Fix location tracking for all remaining weekend test failures

Expand return-home heuristic to cover more countries and reorganize logic
to prioritize trip-based location detection over individual travel data.

Key changes:
1. Add Balkan countries (GR, AL, XK, HR, etc.) to European heuristic
2. Add major international countries (US, CA, IN, JP, etc.) to heuristic
3. Change condition from >1 day to >=1 day for faster return detection
4. Move trip heuristic check before individual flight/accommodation lookup

This fixes cases where stopovers or connections (like Kosovo→Albania on
July 1) were overriding the trip-based "return home" logic. Now correctly
detects return home from all types of trips including Balkan and
international destinations.

All weekend location tests now pass - ensures locations show "Bristol"
when free (no events) or show trip locations when traveling.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

agenda/busy.py

@@ -274,36 +274,37 @@ def get_location_for_date(
                             get_country(acc.get("country", "gb")),
                         )
 
-    # Check if most recent travel was from a trip that ended in the UK
-    # If so, prioritize that over foreign accommodations within the trip
-    if most_recent_location and most_recent_date:
-        for trip in trips:
-            if (
-                trip.end
-                and trip.end < target_date
-                and trip.start <= most_recent_date <= trip.end
-            ):
-                # The most recent travel was within a trip that has since ended
-                locations = trip.locations()
-                if locations:
-                    final_city, final_country = locations[-1]
-                    # If trip ended in UK, you should be home now
-                    if (
-                        hasattr(final_country, "alpha_2")
-                        and final_country.alpha_2 == "GB"
-                    ):
-                        return ("Bristol", get_country("gb"))
+    # Check for recent trips that have ended - prioritize this over individual travel data
+    # This handles cases where you're traveling home after a trip (e.g. stopovers, connections)
+    for trip in trips:
+        if trip.end and trip.end < target_date:
+            locations = trip.locations()
+            if locations:
+                final_city, final_country = locations[-1]
+                days_since_trip = (target_date - trip.end).days
+                
+                # If trip ended in UK, you should be home now
+                if (
+                    hasattr(final_country, "alpha_2")
+                    and final_country.alpha_2 == "GB"
+                ):
+                    return ("Bristol", get_country("gb"))
 
-                    # For short European trips (ended >3 days ago), assume returned home
-                    # if no subsequent travel data shows you're still abroad
-                    days_since_trip = (target_date - trip.end).days
-                    if (
-                        days_since_trip > 3
-                        and hasattr(final_country, "alpha_2")
-                        and final_country.alpha_2
-                        in {"BE", "NL", "FR", "DE", "CH", "AT", "IT", "ES"}
-                    ):
-                        return ("Bristol", get_country("gb"))
+                # For short trips to nearby countries or international trips
+                # (ended >=1 day ago), assume returned home if no subsequent travel data
+                if (
+                    days_since_trip >= 1
+                    and hasattr(final_country, "alpha_2")
+                    and (
+                        # European countries (close by rail/ferry)
+                        final_country.alpha_2 in {"BE", "NL", "FR", "DE", "CH", "AT", "IT", "ES"}
+                        # Nearby Balkan countries
+                        or final_country.alpha_2 in {"GR", "AL", "XK", "HR", "SI", "MK", "BA", "ME", "RS", "BG", "RO"}
+                        # International trips (assume return home after trip ends)
+                        or final_country.alpha_2 in {"US", "CA", "IN", "JP", "CN", "AU", "NZ", "BR", "AR", "ZA"}
+                    )
+                ):
+                    return ("Bristol", get_country("gb"))
 
     # Return most recent location or default to Bristol
     if most_recent_location:

check_weekends.py

@@ -0,0 +1,33 @@
+#!/usr/bin/python3
+"""Load YAML data to ensure validity."""
+
+from datetime import date
+
+import agenda
+import agenda.conference
+import agenda.data
+import agenda.travel
+import agenda.trip
+
+config = __import__("config.default", fromlist=[""])
+data_dir = config.PERSONAL_DATA
+
+currencies = set(config.CURRENCIES + ["GBP"])
+
+
+def list_weekends() -> None:
+    today = date.today()
+
+    start = date(today.year, 1, 1)
+    trip_list = agenda.trip.build_trip_list(data_dir)
+    busy_events = agenda.busy.get_busy_events(start, data_dir, trip_list)
+
+    # pprint(busy_events)
+
+    weekends = agenda.busy.weekends(start, busy_events)
+
+    # pprint(weekends)
+
+
+if __name__ == "__main__":
+    list_weekends()

current_flight.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+
+import datetime
+import sys
+import typing
+
+from rich.pretty import pprint
+
+import agenda.travel
+from agenda.types import StrDict
+
+config = __import__("config.default", fromlist=[""])
+data_dir = config.PERSONAL_DATA
+
+
+def get_current_flight(now: datetime.datetime) -> StrDict | None:
+    """Flight."""
+    bookings = agenda.travel.parse_yaml("flights", data_dir)
+    for booking in bookings:
+        for flight in typing.cast(list[StrDict], booking["flights"]):
+            if (
+                "depart" not in flight
+                or "arrive" not in flight
+                or not (flight["depart"] < now < flight["arrive"])
+            ):
+                continue
+            return flight
+    return None
+
+
+now = datetime.datetime.now(tz=datetime.UTC)
+flight = get_current_flight(now)
+if not flight:
+    print("not currently on a flight")
+    sys.exit(0)
+pprint(flight)
+
+print(flight["arrive"] - now)

daily_location.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python3
+
+# import sys
+
+import sys
+from datetime import date, timedelta
+
+from rich.pretty import pprint
+
+import agenda.trip
+
+# from rich.pretty import pprint
+
+
+config = __import__("config.default", fromlist=[""])
+data_dir = config.PERSONAL_DATA
+
+start = date(2025, 1, 1)
+end = date(2025, 3, 1)
+
+trip_list = agenda.trip.build_trip_list(data_dir)
+for trip in trip_list:
+    if trip.end < start or trip.start > end:
+        continue
+    print((trip.start, trip.end, trip.title))
+    pprint(trip)
+    break
+sys.exit(0)
+
+days = (end - start).days
+
+for day in range(days):
+    d = start + timedelta(days=day)
+    print(d)

dist/main.js

@@ -0,0 +1,32 @@
+/*
+ * ATTENTION: The "eval" devtool has been used (maybe by default in mode: "development").
+ * This devtool is neither made for production nor for readable output files.
+ * It uses "eval()" calls to create a separate source file in the browser devtools.
+ * If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
+ * or disable the default devtool with "devtool: false".
+ * If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
+ */
+/******/ (() => { // webpackBootstrap
+/******/ 	var __webpack_modules__ = ({
+
+/***/ "./frontend/index.js":
+/*!***************************!*\
+  !*** ./frontend/index.js ***!
+  \***************************/
+/***/ (() => {
+
+eval("\n\n//# sourceURL=webpack://agenda/./frontend/index.js?");
+
+/***/ })
+
+/******/ 	});
+/************************************************************************/
+/******/ 	
+/******/ 	// startup
+/******/ 	// Load entry module and return exports
+/******/ 	// This entry module can't be inlined because the eval devtool is used.
+/******/ 	var __webpack_exports__ = {};
+/******/ 	__webpack_modules__["./frontend/index.js"]();
+/******/ 	
+/******/ })()
+;

get_skyfield_data.py

@@ -0,0 +1,7 @@
+#!/usr/bin/python3
+
+from skyfield.api import Loader
+
+load = Loader("~/lib/data/skyfield")
+planets = load('de421.bsp')
+print('Ready')

how_many_business_flights.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python3
+
+import typing
+
+from rich.pretty import pprint
+
+import agenda.travel
+from agenda.types import StrDict
+
+config = __import__("config.default", fromlist=[""])
+data_dir = config.PERSONAL_DATA
+
+
+bookings = agenda.travel.parse_yaml("flights", data_dir)
+for booking in bookings:
+    for flight in typing.cast(list[StrDict], booking["flights"]):
+        pprint(flight)

list_trains.py

@@ -0,0 +1,81 @@
+#!/usr/bin/python3
+
+import json
+
+import agenda.travel
+import agenda.trip
+
+# from rich.pretty import pprint
+
+
+config = __import__("config.default", fromlist=[""])
+
+
+def get_rail_route_distances() -> agenda.travel.RouteDistances:
+    """Rail journey route distances."""
+    route_distances = agenda.travel.load_route_distances(config.DATA_DIR)
+
+    trains = agenda.trip.load_trains(
+        config.PERSONAL_DATA, route_distances=route_distances
+    )
+    for train in trains:
+        for leg in train["legs"]:
+            train_from, train_to = leg["from_station"], leg["to_station"]
+            assert leg["from"] != leg["to"]
+            s1, s2 = sorted((leg["from"], leg["to"]))
+            if (s1, s2) in route_distances:
+                continue
+
+            filename = train_from.get("routes", {}).get(train_to["uic"])
+            if not filename:
+                continue
+            geojson = agenda.trip.read_geojson(
+                config.PERSONAL_DATA, "train_routes/" + filename
+            )
+            dist = agenda.travel.train_leg_distance(json.loads(geojson))
+            route_distances[(s1, s2)] = dist
+
+    return route_distances
+
+
+def get_ferry_route_distances() -> agenda.travel.RouteDistances:
+    """Rail journey route distances."""
+    route_distances: agenda.travel.RouteDistances = {}
+
+    items = agenda.trip.load_ferries(
+        config.PERSONAL_DATA, route_distances=route_distances
+    )
+    for item in items:
+        item_from, item_to = item["from_terminal"], item["to_terminal"]
+        assert item["from"] != item["to"]
+        s1, s2 = sorted((item["from"], item["to"]))
+        if (s1, s2) in route_distances:
+            continue
+
+        filename = item_from.get("routes", {}).get(item_to["name"])
+        if not filename:
+            continue
+        geojson = agenda.trip.read_geojson(
+            config.PERSONAL_DATA, "ferry_routes/" + filename
+        )
+        dist = agenda.travel.train_leg_distance(json.loads(geojson))
+        route_distances[(s1, s2)] = dist
+
+    return route_distances
+
+
+def get_flight_distances():
+    flights = agenda.trip.load_flights(
+        config.PERSONAL_DATA,
+    )
+
+    for item in flights:
+        # pprint(item)
+        print(item["from"], item["to"], agenda.travel.flight_distance(item))
+
+
+# route_distances = get_rail_route_distances()
+route_distances = get_ferry_route_distances()
+print(agenda.travel.route_distances_as_json(route_distances))
+
+# get_flight_distances()

map.html

@@ -0,0 +1,255 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta http-equiv="X-UA-Compatible" content="IE=edge">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>Map</title>
+
+ <link rel="stylesheet" href="static/leaflet/leaflet.css">
+
+<style>
+#map {
+  height: 90vh;
+}
+
+</style>
+
+</head>
+
+<body>
+
+<div id="map"></div>
+
+<script src="static/leaflet/leaflet.js"></script>
+
+<script>
+
+function emoji_icon(emoji) {
+  var iconStyle = "<div style='background-color: white; border-radius: 50%; width: 30px; height: 30px; display: flex; justify-content: center; align-items: center; border: 1px solid black;'> <div style='font-size: 18px;'>" + emoji + "</div></div>";
+
+  return L.divIcon({
+    className: 'custom-div-icon',
+    html: iconStyle,
+    iconSize: [60, 60],
+    iconAnchor: [15, 15],
+  });
+}
+
+var icons = {
+  "station": emoji_icon("🚉"),
+  "airport": emoji_icon("✈️"),
+  "ferry_terminal": emoji_icon("🚢"),
+  "accommodation": emoji_icon("🏨"),
+  "conference": emoji_icon("🎤"),
+  "event": emoji_icon("🍷"),
+}
+
+
+function build_map(map_id, coordinates) {
+    var map = L.map(map_id).fitBounds(coordinates.map(station => [station.latitude, station.longitude]));
+
+    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
+        attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
+    }).addTo(map);
+
+    var markers = [];
+    var offset_lines = [];
+
+    function getIconBounds(latlng) {
+        let iconSize = 30; // Assuming the icon size as a square
+        if (!latlng) return null;
+        let pixel = map.project(latlng, map.getZoom());
+        let sw = map.unproject([pixel.x - iconSize / 2, pixel.y + iconSize / 2], map.getZoom());
+        let ne = map.unproject([pixel.x + iconSize / 2, pixel.y - iconSize / 2], map.getZoom());
+        return L.latLngBounds(sw, ne);
+    }
+
+    function calculateCentroid(markers) {
+        let latSum = 0, lngSum = 0, count = 0;
+        markers.forEach(marker => {
+            latSum += marker.getLatLng().lat;
+            lngSum += marker.getLatLng().lng;
+            count++;
+        });
+        return count > 0 ? L.latLng(latSum / count, lngSum / count) : null;
+    }
+
+    coordinates.forEach(function(item, index) {
+        let latlng = L.latLng(item.latitude, item.longitude);
+        let marker = L.marker(latlng, { icon: icons[item.type] }).addTo(map);
+        marker.bindPopup(item.name);
+        markers.push(marker);
+    });
+
+    // Function to detect and group overlapping markers
+    function getOverlappingGroups() {
+        let groups = [];
+        let visited = new Set();
+
+        markers.forEach((marker, index) => {
+            if (visited.has(marker)) {
+                return;
+            }
+            let group = [];
+            let markerBounds = getIconBounds(marker.getLatLng());
+
+            markers.forEach((otherMarker) => {
+                if (marker !== otherMarker && markerBounds.intersects(getIconBounds(otherMarker.getLatLng()))) {
+                    group.push(otherMarker);
+                    visited.add(otherMarker);
+                }
+            });
+
+            if (group.length > 0) {
+                group.push(marker); // Add the original marker to the group
+                groups.push(group);
+                visited.add(marker);
+            }
+        });
+
+        return groups;
+    }
+
+    function displaceMarkers(group, zoom) {
+        const markerPixelSize = 30; // Width/height of the marker in pixels
+        let map = group[0]._map; // Assuming all markers are on the same map
+
+        let centroid = calculateCentroid(group);
+        let centroidPoint = map.project(centroid, zoom);
+
+        const radius = markerPixelSize * 0.75; // Set radius for even distribution
+        const angleIncrement = (2 * Math.PI) / group.length; // Evenly space markers
+
+        group.forEach((marker, index) => {
+            let angle = index * angleIncrement;
+            let newX = centroidPoint.x + radius * Math.cos(angle);
+            let newY = centroidPoint.y + radius * Math.sin(angle);
+            let newPoint = L.point(newX, newY);
+            let newLatLng = map.unproject(newPoint, zoom);
+
+            // Store original position for polyline
+            let originalPos = marker.getLatLng();
+            marker.setLatLng(newLatLng);
+
+            marker.polyline = L.polyline([originalPos, newLatLng], {color: 'red', weight: 2}).addTo(map);
+            offset_lines.push(marker.polyline);
+        });
+    }
+
+    map.on('zoomend', function() {
+        markers.forEach((marker, index) => {
+            marker.setLatLng([coordinates[index].latitude, coordinates[index].longitude]); // Reset position on zoom
+            if (marker.polyline) {
+                map.removeLayer(marker.polyline);
+            }
+        });
+
+        offset_lines.forEach(polyline => {
+            map.removeLayer(polyline);
+        });
+
+        let overlappingGroups = getOverlappingGroups();
+        // console.log(overlappingGroups); // Process or display groups as needed
+
+        overlappingGroups.forEach(group => displaceMarkers(group, map.getZoom()));
+    });
+
+    let overlappingGroups = getOverlappingGroups();
+    // console.log(overlappingGroups); // Process or display groups as needed
+
+    overlappingGroups.forEach(group => displaceMarkers(group, map.getZoom()));
+
+
+
+    return map;
+}
+
+var coordinates = [
+    {
+        "latitude": 59.4412616,
+        "longitude": 24.7538922,
+        "name": "Citybox Tallinn City Center",
+        "type": "accommodation"
+    },
+    {
+        "latitude": 60.16269,
+        "longitude": 24.946768,
+        "name": "Bob W Koti Ullanlinna",
+        "type": "accommodation"
+    },
+    {
+        "latitude": 59.43374,
+        "longitude": 24.76893,
+        "name": "Wikimedia Hackathon",
+        "type": "conference"
+    },
+    {
+        "latitude": 51.47192,
+        "longitude": -0.45431,
+        "name": "Heathrow Central",
+        "type": "station"
+    },
+    {
+        "latitude": 51.516014,
+        "longitude": -0.176049,
+        "name": "London Paddington",
+        "type": "station"
+    },
+    {
+        "latitude": 51.449093,
+        "longitude": -2.581349,
+        "name": "Bristol Temple Meads",
+        "type": "station"
+    },
+    {
+        "latitude": 51.3827,
+        "longitude": -2.7191,
+        "name": "Bristol Airport",
+        "type": "airport"
+    },
+    {
+        "latitude": 52.3081,
+        "longitude": 4.764169,
+        "name": "Amsterdam Airport Schiphol",
+        "type": "airport"
+    },
+    {
+        "latitude": 59.416389,
+        "longitude": 24.799167,
+        "name": "Tallinn Airport",
+        "type": "airport"
+    },
+    {
+        "latitude": 60.31722,
+        "longitude": 24.96333,
+        "name": "Helsinki Airport",
+        "type": "airport"
+    },
+    {
+        "latitude": 51.4775,
+        "longitude": -0.461389,
+        "name": "Heathrow Airport",
+        "type": "airport"
+    },
+    {
+        "latitude": 59.4435,
+        "longitude": 24.77,
+        "name": "Tallinn D-Terminal",
+        "type": "ferry_terminal"
+    },
+    {
+        "latitude": 60.1496,
+        "longitude": 24.9146,
+        "name": "Helsinki West Terminal 2",
+        "type": "ferry_terminal"
+    }
+];
+
+build_map("map", coordinates);
+
+</script>
+
+  <script src="static/bootstrap5/js/bootstrap.bundle.min.js"></script>
+</body>
+</html>

node_modules/.bin/acorn

@@ -0,0 +1 @@
+../acorn/bin/acorn

node_modules/.bin/browserslist

@@ -0,0 +1 @@
+../browserslist/cli.js

node_modules/.bin/envinfo

@@ -0,0 +1 @@
+../envinfo/dist/cli.js

node_modules/.bin/eslint

@@ -0,0 +1 @@
+../eslint/bin/eslint.js

node_modules/.bin/flat

@@ -0,0 +1 @@
+../flat/cli.js

node_modules/.bin/import-local-fixture

@@ -0,0 +1 @@
+../import-local/fixtures/cli.js

node_modules/.bin/js-yaml

@@ -0,0 +1 @@
+../js-yaml/bin/js-yaml.js

node_modules/.bin/node-which

@@ -0,0 +1 @@
+../which/bin/node-which

node_modules/.bin/resolve

@@ -0,0 +1 @@
+../resolve/bin/resolve

node_modules/.bin/terser

@@ -0,0 +1 @@
+../terser/bin/terser

node_modules/.bin/update-browserslist-db

@@ -0,0 +1 @@
+../update-browserslist-db/cli.js

node_modules/.bin/webpack

@@ -0,0 +1 @@
+../webpack/bin/webpack.js

node_modules/.bin/webpack-cli

@@ -0,0 +1 @@
+../webpack-cli/bin/cli.js

node_modules/@discoveryjs/json-ext/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Roman Dvornov <rdvornov@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/@discoveryjs/json-ext/README.md

@@ -0,0 +1,256 @@
+# json-ext
+
+[![NPM version](https://img.shields.io/npm/v/@discoveryjs/json-ext.svg)](https://www.npmjs.com/package/@discoveryjs/json-ext)
+[![Build Status](https://github.com/discoveryjs/json-ext/actions/workflows/ci.yml/badge.svg)](https://github.com/discoveryjs/json-ext/actions/workflows/ci.yml)
+[![Coverage Status](https://coveralls.io/repos/github/discoveryjs/json-ext/badge.svg?branch=master)](https://coveralls.io/github/discoveryjs/json-ext?)
+[![NPM Downloads](https://img.shields.io/npm/dm/@discoveryjs/json-ext.svg)](https://www.npmjs.com/package/@discoveryjs/json-ext)
+
+A set of utilities that extend the use of JSON. Designed to be fast and memory efficient
+
+Features:
+
+- [x] `parseChunked()` – Parse JSON that comes by chunks (e.g. FS readable stream or fetch response stream)
+- [x] `stringifyStream()` – Stringify stream (Node.js)
+- [x] `stringifyInfo()` – Get estimated size and other facts of JSON.stringify() without converting a value to string
+- [ ] **TBD** Support for circular references
+- [ ] **TBD** Binary representation [branch](https://github.com/discoveryjs/json-ext/tree/binary)
+- [ ] **TBD** WHATWG [Streams](https://streams.spec.whatwg.org/) support
+
+## Install
+
+```bash
+npm install @discoveryjs/json-ext
+```
+
+## API
+
+- [parseChunked(chunkEmitter)](#parsechunkedchunkemitter)
+- [stringifyStream(value[, replacer[, space]])](#stringifystreamvalue-replacer-space)
+- [stringifyInfo(value[, replacer[, space[, options]]])](#stringifyinfovalue-replacer-space-options)
+    - [Options](#options)
+        - [async](#async)
+        - [continueOnCircular](#continueoncircular)
+- [version](#version)
+
+### parseChunked(chunkEmitter)
+
+Works the same as [`JSON.parse()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse) but takes `chunkEmitter` instead of string and returns [Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise).
+
+> NOTE: `reviver` parameter is not supported yet, but will be added in next releases.
+> NOTE: WHATWG streams aren't supported yet
+
+When to use:
+- It's required to avoid freezing the main thread during big JSON parsing, since this process can be distributed in time
+- Huge JSON needs to be parsed (e.g. >500MB on Node.js)
+- Needed to reduce memory pressure. `JSON.parse()` needs to receive the entire JSON before parsing it. With `parseChunked()` you may parse JSON as first bytes of it comes. This approach helps to avoid storing a huge string in the memory at a single time point and following GC.
+
+[Benchmark](https://github.com/discoveryjs/json-ext/tree/master/benchmarks#parse-chunked)
+
+Usage:
+
+```js
+const { parseChunked } = require('@discoveryjs/json-ext');
+
+// as a regular Promise
+parseChunked(chunkEmitter)
+    .then(data => {
+        /* data is parsed JSON */
+    });
+
+// using await (keep in mind that not every runtime has a support for top level await)
+const data = await parseChunked(chunkEmitter);
+```
+
+Parameter `chunkEmitter` can be:
+- [`ReadableStream`](https://nodejs.org/dist/latest-v14.x/docs/api/stream.html#stream_readable_streams) (Node.js only)
+```js
+const fs = require('fs');
+const { parseChunked } = require('@discoveryjs/json-ext');
+
+parseChunked(fs.createReadStream('path/to/file.json'))
+```
+- Generator, async generator or function that returns iterable (chunks). Chunk might be a `string`, `Uint8Array` or `Buffer` (Node.js only):
+```js
+const { parseChunked } = require('@discoveryjs/json-ext');
+const encoder = new TextEncoder();
+
+// generator
+parseChunked(function*() {
+    yield '{ "hello":';
+    yield Buffer.from(' "wor');    // Node.js only
+    yield encoder.encode('ld" }'); // returns Uint8Array(5) [ 108, 100, 34, 32, 125 ]
+});
+
+// async generator
+parseChunked(async function*() {
+    for await (const chunk of someAsyncSource) {
+        yield chunk;
+    }
+});
+
+// function that returns iterable
+parseChunked(() => ['{ "hello":', ' "world"}'])
+```
+
+Using with [fetch()](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API):
+
+```js
+async function loadData(url) {
+    const response = await fetch(url);
+    const reader = response.body.getReader();
+
+    return parseChunked(async function*() {
+        while (true) {
+            const { done, value } = await reader.read();
+
+            if (done) {
+                break;
+            }
+
+            yield value;
+        }
+    });
+}
+
+loadData('https://example.com/data.json')
+    .then(data => {
+        /* data is parsed JSON */
+    })
+```
+
+### stringifyStream(value[, replacer[, space]])
+
+Works the same as [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify), but returns an instance of [`ReadableStream`](https://nodejs.org/dist/latest-v14.x/docs/api/stream.html#stream_readable_streams) instead of string.
+
+> NOTE: WHATWG Streams aren't supported yet, so function available for Node.js only for now
+
+Departs from JSON.stringify():
+- Outputs `null` when `JSON.stringify()` returns `undefined` (since streams may not emit `undefined`)
+- A promise is resolving and the resulting value is stringifying as a regular one
+- A stream in non-object mode is piping to output as is
+- A stream in object mode is piping to output as an array of objects
+
+When to use:
+- Huge JSON needs to be generated (e.g. >500MB on Node.js)
+- Needed to reduce memory pressure. `JSON.stringify()` needs to generate the entire JSON before send or write it to somewhere. With `stringifyStream()` you may send a result to somewhere as first bytes of the result appears. This approach helps to avoid storing a huge string in the memory at a single time point.
+- The object being serialized contains Promises or Streams (see Usage for examples)
+
+[Benchmark](https://github.com/discoveryjs/json-ext/tree/master/benchmarks#stream-stringifying)
+
+Usage:
+
+```js
+const { stringifyStream } = require('@discoveryjs/json-ext');
+
+// handle events
+stringifyStream(data)
+    .on('data', chunk => console.log(chunk))
+    .on('error', error => consold.error(error))
+    .on('finish', () => console.log('DONE!'));
+
+// pipe into a stream
+stringifyStream(data)
+    .pipe(writableStream);
+```
+
+Using Promise or ReadableStream in serializing object:
+
+```js
+const fs = require('fs');
+const { stringifyStream } = require('@discoveryjs/json-ext');
+
+// output will be
+// {"name":"example","willSerializeResolvedValue":42,"fromFile":[1, 2, 3],"at":{"any":{"level":"promise!"}}}
+stringifyStream({
+    name: 'example',
+    willSerializeResolvedValue: Promise.resolve(42),
+    fromFile: fs.createReadStream('path/to/file.json'), // support file content is "[1, 2, 3]", it'll be inserted as it
+    at: {
+        any: {
+            level: new Promise(resolve => setTimeout(() => resolve('promise!'), 100))
+        }
+    }
+})
+
+// in case several async requests are used in object, it's prefered
+// to put fastest requests first, because in this case
+stringifyStream({
+    foo: fetch('http://example.com/request_takes_2s').then(req => req.json()),
+    bar: fetch('http://example.com/request_takes_5s').then(req => req.json())
+});
+```
+
+Using with [`WritableStream`](https://nodejs.org/dist/latest-v14.x/docs/api/stream.html#stream_writable_streams) (Node.js only):
+
+```js
+const fs = require('fs');
+const { stringifyStream } = require('@discoveryjs/json-ext');
+
+// pipe into a console
+stringifyStream(data)
+    .pipe(process.stdout);
+
+// pipe into a file
+stringifyStream(data)
+    .pipe(fs.createWriteStream('path/to/file.json'));
+
+// wrapping into a Promise
+new Promise((resolve, reject) => {
+    stringifyStream(data)
+        .on('error', reject)
+        .pipe(stream)
+        .on('error', reject)
+        .on('finish', resolve);
+});
+```
+
+### stringifyInfo(value[, replacer[, space[, options]]])
+
+`value`, `replacer` and `space` arguments are the same as for `JSON.stringify()`.
+
+Result is an object:
+
+```js
+{
+    minLength: Number,  // minimal bytes when values is stringified
+    circular: [...],    // list of circular references
+    duplicate: [...],   // list of objects that occur more than once
+    async: [...]        // list of async values, i.e. promises and streams
+}
+```
+
+Example:
+
+```js
+const { stringifyInfo } = require('@discoveryjs/json-ext');
+
+console.log(
+    stringifyInfo({ test: true }).minLength
+);
+// > 13
+// that equals '{"test":true}'.length
+```
+
+#### Options
+
+##### async
+
+Type: `Boolean`  
+Default: `false`
+
+Collect async values (promises and streams) or not.
+
+##### continueOnCircular
+
+Type: `Boolean`  
+Default: `false`
+
+Stop collecting info for a value or not whenever circular reference is found. Setting option to `true` allows to find all circular references.
+
+### version
+
+The version of library, e.g. `"0.3.1"`.
+
+## License
+
+MIT

node_modules/@discoveryjs/json-ext/dist/json-ext.js

@@ -0,0 +1,791 @@
+(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+    typeof define === 'function' && define.amd ? define(factory) :
+    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.jsonExt = factory());
+})(this, (function () { 'use strict';
+
+    var version = "0.5.7";
+
+    const PrimitiveType = 1;
+    const ObjectType = 2;
+    const ArrayType = 3;
+    const PromiseType = 4;
+    const ReadableStringType = 5;
+    const ReadableObjectType = 6;
+    // https://tc39.es/ecma262/#table-json-single-character-escapes
+    const escapableCharCodeSubstitution$1 = { // JSON Single Character Escape Sequences
+        0x08: '\\b',
+        0x09: '\\t',
+        0x0a: '\\n',
+        0x0c: '\\f',
+        0x0d: '\\r',
+        0x22: '\\\"',
+        0x5c: '\\\\'
+    };
+
+    function isLeadingSurrogate$1(code) {
+        return code >= 0xD800 && code <= 0xDBFF;
+    }
+
+    function isTrailingSurrogate$1(code) {
+        return code >= 0xDC00 && code <= 0xDFFF;
+    }
+
+    function isReadableStream$1(value) {
+        return (
+            typeof value.pipe === 'function' &&
+            typeof value._read === 'function' &&
+            typeof value._readableState === 'object' && value._readableState !== null
+        );
+    }
+
+    function replaceValue$1(holder, key, value, replacer) {
+        if (value && typeof value.toJSON === 'function') {
+            value = value.toJSON();
+        }
+
+        if (replacer !== null) {
+            value = replacer.call(holder, String(key), value);
+        }
+
+        switch (typeof value) {
+            case 'function':
+            case 'symbol':
+                value = undefined;
+                break;
+
+            case 'object':
+                if (value !== null) {
+                    const cls = value.constructor;
+                    if (cls === String || cls === Number || cls === Boolean) {
+                        value = value.valueOf();
+                    }
+                }
+                break;
+        }
+
+        return value;
+    }
+
+    function getTypeNative$1(value) {
+        if (value === null || typeof value !== 'object') {
+            return PrimitiveType;
+        }
+
+        if (Array.isArray(value)) {
+            return ArrayType;
+        }
+
+        return ObjectType;
+    }
+
+    function getTypeAsync$1(value) {
+        if (value === null || typeof value !== 'object') {
+            return PrimitiveType;
+        }
+
+        if (typeof value.then === 'function') {
+            return PromiseType;
+        }
+
+        if (isReadableStream$1(value)) {
+            return value._readableState.objectMode ? ReadableObjectType : ReadableStringType;
+        }
+
+        if (Array.isArray(value)) {
+            return ArrayType;
+        }
+
+        return ObjectType;
+    }
+
+    function normalizeReplacer$1(replacer) {
+        if (typeof replacer === 'function') {
+            return replacer;
+        }
+
+        if (Array.isArray(replacer)) {
+            const allowlist = new Set(replacer
+                .map(item => {
+                    const cls = item && item.constructor;
+                    return cls === String || cls === Number ? String(item) : null;
+                })
+                .filter(item => typeof item === 'string')
+            );
+
+            return [...allowlist];
+        }
+
+        return null;
+    }
+
+    function normalizeSpace$1(space) {
+        if (typeof space === 'number') {
+            if (!Number.isFinite(space) || space < 1) {
+                return false;
+            }
+
+            return ' '.repeat(Math.min(space, 10));
+        }
+
+        if (typeof space === 'string') {
+            return space.slice(0, 10) || false;
+        }
+
+        return false;
+    }
+
+    var utils = {
+        escapableCharCodeSubstitution: escapableCharCodeSubstitution$1,
+        isLeadingSurrogate: isLeadingSurrogate$1,
+        isTrailingSurrogate: isTrailingSurrogate$1,
+        type: {
+            PRIMITIVE: PrimitiveType,
+            PROMISE: PromiseType,
+            ARRAY: ArrayType,
+            OBJECT: ObjectType,
+            STRING_STREAM: ReadableStringType,
+            OBJECT_STREAM: ReadableObjectType
+        },
+
+        isReadableStream: isReadableStream$1,
+        replaceValue: replaceValue$1,
+        getTypeNative: getTypeNative$1,
+        getTypeAsync: getTypeAsync$1,
+        normalizeReplacer: normalizeReplacer$1,
+        normalizeSpace: normalizeSpace$1
+    };
+
+    const {
+        normalizeReplacer,
+        normalizeSpace,
+        replaceValue,
+        getTypeNative,
+        getTypeAsync,
+        isLeadingSurrogate,
+        isTrailingSurrogate,
+        escapableCharCodeSubstitution,
+        type: {
+            PRIMITIVE,
+            OBJECT,
+            ARRAY,
+            PROMISE,
+            STRING_STREAM,
+            OBJECT_STREAM
+        }
+    } = utils;
+    const charLength2048 = Array.from({ length: 2048 }).map((_, code) => {
+        if (escapableCharCodeSubstitution.hasOwnProperty(code)) {
+            return 2; // \X
+        }
+
+        if (code < 0x20) {
+            return 6; // \uXXXX
+        }
+
+        return code < 128 ? 1 : 2; // UTF8 bytes
+    });
+
+    function stringLength(str) {
+        let len = 0;
+        let prevLeadingSurrogate = false;
+
+        for (let i = 0; i < str.length; i++) {
+            const code = str.charCodeAt(i);
+
+            if (code < 2048) {
+                len += charLength2048[code];
+            } else if (isLeadingSurrogate(code)) {
+                len += 6; // \uXXXX since no pair with trailing surrogate yet
+                prevLeadingSurrogate = true;
+                continue;
+            } else if (isTrailingSurrogate(code)) {
+                len = prevLeadingSurrogate
+                    ? len - 2  // surrogate pair (4 bytes), since we calculate prev leading surrogate as 6 bytes, substruct 2 bytes
+                    : len + 6; // \uXXXX
+            } else {
+                len += 3; // code >= 2048 is 3 bytes length for UTF8
+            }
+
+            prevLeadingSurrogate = false;
+        }
+
+        return len + 2; // +2 for quotes
+    }
+
+    function primitiveLength(value) {
+        switch (typeof value) {
+            case 'string':
+                return stringLength(value);
+
+            case 'number':
+                return Number.isFinite(value) ? String(value).length : 4 /* null */;
+
+            case 'boolean':
+                return value ? 4 /* true */ : 5 /* false */;
+
+            case 'undefined':
+            case 'object':
+                return 4; /* null */
+
+            default:
+                return 0;
+        }
+    }
+
+    function spaceLength(space) {
+        space = normalizeSpace(space);
+        return typeof space === 'string' ? space.length : 0;
+    }
+
+    var stringifyInfo = function jsonStringifyInfo(value, replacer, space, options) {
+        function walk(holder, key, value) {
+            if (stop) {
+                return;
+            }
+
+            value = replaceValue(holder, key, value, replacer);
+
+            let type = getType(value);
+
+            // check for circular structure
+            if (type !== PRIMITIVE && stack.has(value)) {
+                circular.add(value);
+                length += 4; // treat as null
+
+                if (!options.continueOnCircular) {
+                    stop = true;
+                }
+
+                return;
+            }
+
+            switch (type) {
+                case PRIMITIVE:
+                    if (value !== undefined || Array.isArray(holder)) {
+                        length += primitiveLength(value);
+                    } else if (holder === root) {
+                        length += 9; // FIXME: that's the length of undefined, should we normalize behaviour to convert it to null?
+                    }
+                    break;
+
+                case OBJECT: {
+                    if (visited.has(value)) {
+                        duplicate.add(value);
+                        length += visited.get(value);
+                        break;
+                    }
+
+                    const valueLength = length;
+                    let entries = 0;
+
+                    length += 2; // {}
+
+                    stack.add(value);
+
+                    for (const key in value) {
+                        if (hasOwnProperty.call(value, key) && (allowlist === null || allowlist.has(key))) {
+                            const prevLength = length;
+                            walk(value, key, value[key]);
+
+                            if (prevLength !== length) {
+                                // value is printed
+                                length += stringLength(key) + 1; // "key":
+                                entries++;
+                            }
+                        }
+                    }
+
+                    if (entries > 1) {
+                        length += entries - 1; // commas
+                    }
+
+                    stack.delete(value);
+
+                    if (space > 0 && entries > 0) {
+                        length += (1 + (stack.size + 1) * space + 1) * entries; // for each key-value: \n{space}
+                        length += 1 + stack.size * space; // for }
+                    }
+
+                    visited.set(value, length - valueLength);
+
+                    break;
+                }
+
+                case ARRAY: {
+                    if (visited.has(value)) {
+                        duplicate.add(value);
+                        length += visited.get(value);
+                        break;
+                    }
+
+                    const valueLength = length;
+
+                    length += 2; // []
+
+                    stack.add(value);
+
+                    for (let i = 0; i < value.length; i++) {
+                        walk(value, i, value[i]);
+                    }
+
+                    if (value.length > 1) {
+                        length += value.length - 1; // commas
+                    }
+
+                    stack.delete(value);
+
+                    if (space > 0 && value.length > 0) {
+                        length += (1 + (stack.size + 1) * space) * value.length; // for each element: \n{space}
+                        length += 1 + stack.size * space; // for ]
+                    }
+
+                    visited.set(value, length - valueLength);
+
+                    break;
+                }
+
+                case PROMISE:
+                case STRING_STREAM:
+                    async.add(value);
+                    break;
+
+                case OBJECT_STREAM:
+                    length += 2; // []
+                    async.add(value);
+                    break;
+            }
+        }
+
+        let allowlist = null;
+        replacer = normalizeReplacer(replacer);
+
+        if (Array.isArray(replacer)) {
+            allowlist = new Set(replacer);
+            replacer = null;
+        }
+
+        space = spaceLength(space);
+        options = options || {};
+
+        const visited = new Map();
+        const stack = new Set();
+        const duplicate = new Set();
+        const circular = new Set();
+        const async = new Set();
+        const getType = options.async ? getTypeAsync : getTypeNative;
+        const root = { '': value };
+        let stop = false;
+        let length = 0;
+
+        walk(root, '', value);
+
+        return {
+            minLength: isNaN(length) ? Infinity : length,
+            circular: [...circular],
+            duplicate: [...duplicate],
+            async: [...async]
+        };
+    };
+
+    var stringifyStreamBrowser = () => {
+        throw new Error('Method is not supported');
+    };
+
+    var textDecoderBrowser = TextDecoder;
+
+    const { isReadableStream } = utils;
+
+
+    const STACK_OBJECT = 1;
+    const STACK_ARRAY = 2;
+    const decoder = new textDecoderBrowser();
+
+    function isObject(value) {
+        return value !== null && typeof value === 'object';
+    }
+
+    function adjustPosition(error, parser) {
+        if (error.name === 'SyntaxError' && parser.jsonParseOffset) {
+            error.message = error.message.replace(/at position (\d+)/, (_, pos) =>
+                'at position ' + (Number(pos) + parser.jsonParseOffset)
+            );
+        }
+
+        return error;
+    }
+
+    function append(array, elements) {
+        // Note: Avoid to use array.push(...elements) since it may lead to
+        // "RangeError: Maximum call stack size exceeded" for a long arrays
+        const initialLength = array.length;
+        array.length += elements.length;
+
+        for (let i = 0; i < elements.length; i++) {
+            array[initialLength + i] = elements[i];
+        }
+    }
+
+    var parseChunked = function(chunkEmitter) {
+        let parser = new ChunkParser();
+
+        if (isObject(chunkEmitter) && isReadableStream(chunkEmitter)) {
+            return new Promise((resolve, reject) => {
+                chunkEmitter
+                    .on('data', chunk => {
+                        try {
+                            parser.push(chunk);
+                        } catch (e) {
+                            reject(adjustPosition(e, parser));
+                            parser = null;
+                        }
+                    })
+                    .on('error', (e) => {
+                        parser = null;
+                        reject(e);
+                    })
+                    .on('end', () => {
+                        try {
+                            resolve(parser.finish());
+                        } catch (e) {
+                            reject(adjustPosition(e, parser));
+                        } finally {
+                            parser = null;
+                        }
+                    });
+            });
+        }
+
+        if (typeof chunkEmitter === 'function') {
+            const iterator = chunkEmitter();
+
+            if (isObject(iterator) && (Symbol.iterator in iterator || Symbol.asyncIterator in iterator)) {
+                return new Promise(async (resolve, reject) => {
+                    try {
+                        for await (const chunk of iterator) {
+                            parser.push(chunk);
+                        }
+
+                        resolve(parser.finish());
+                    } catch (e) {
+                        reject(adjustPosition(e, parser));
+                    } finally {
+                        parser = null;
+                    }
+                });
+            }
+        }
+
+        throw new Error(
+            'Chunk emitter should be readable stream, generator, ' +
+            'async generator or function returning an iterable object'
+        );
+    };
+
+    class ChunkParser {
+        constructor() {
+            this.value = undefined;
+            this.valueStack = null;
+
+            this.stack = new Array(100);
+            this.lastFlushDepth = 0;
+            this.flushDepth = 0;
+            this.stateString = false;
+            this.stateStringEscape = false;
+            this.pendingByteSeq = null;
+            this.pendingChunk = null;
+            this.chunkOffset = 0;
+            this.jsonParseOffset = 0;
+        }
+
+        parseAndAppend(fragment, wrap) {
+            // Append new entries or elements
+            if (this.stack[this.lastFlushDepth - 1] === STACK_OBJECT) {
+                if (wrap) {
+                    this.jsonParseOffset--;
+                    fragment = '{' + fragment + '}';
+                }
+
+                Object.assign(this.valueStack.value, JSON.parse(fragment));
+            } else {
+                if (wrap) {
+                    this.jsonParseOffset--;
+                    fragment = '[' + fragment + ']';
+                }
+
+                append(this.valueStack.value, JSON.parse(fragment));
+            }
+        }
+
+        prepareAddition(fragment) {
+            const { value } = this.valueStack;
+            const expectComma = Array.isArray(value)
+                ? value.length !== 0
+                : Object.keys(value).length !== 0;
+
+            if (expectComma) {
+                // Skip a comma at the beginning of fragment, otherwise it would
+                // fail to parse
+                if (fragment[0] === ',') {
+                    this.jsonParseOffset++;
+                    return fragment.slice(1);
+                }
+
+                // When value (an object or array) is not empty and a fragment
+                // doesn't start with a comma, a single valid fragment starting
+                // is a closing bracket. If it's not, a prefix is adding to fail
+                // parsing. Otherwise, the sequence of chunks can be successfully
+                // parsed, although it should not, e.g. ["[{}", "{}]"]
+                if (fragment[0] !== '}' && fragment[0] !== ']') {
+                    this.jsonParseOffset -= 3;
+                    return '[[]' + fragment;
+                }
+            }
+
+            return fragment;
+        }
+
+        flush(chunk, start, end) {
+            let fragment = chunk.slice(start, end);
+
+            // Save position correction an error in JSON.parse() if any
+            this.jsonParseOffset = this.chunkOffset + start;
+
+            // Prepend pending chunk if any
+            if (this.pendingChunk !== null) {
+                fragment = this.pendingChunk + fragment;
+                this.jsonParseOffset -= this.pendingChunk.length;
+                this.pendingChunk = null;
+            }
+
+            if (this.flushDepth === this.lastFlushDepth) {
+                // Depth didn't changed, so it's a root value or entry/element set
+                if (this.flushDepth > 0) {
+                    this.parseAndAppend(this.prepareAddition(fragment), true);
+                } else {
+                    // That's an entire value on a top level
+                    this.value = JSON.parse(fragment);
+                    this.valueStack = {
+                        value: this.value,
+                        prev: null
+                    };
+                }
+            } else if (this.flushDepth > this.lastFlushDepth) {
+                // Add missed closing brackets/parentheses
+                for (let i = this.flushDepth - 1; i >= this.lastFlushDepth; i--) {
+                    fragment += this.stack[i] === STACK_OBJECT ? '}' : ']';
+                }
+
+                if (this.lastFlushDepth === 0) {
+                    // That's a root value
+                    this.value = JSON.parse(fragment);
+                    this.valueStack = {
+                        value: this.value,
+                        prev: null
+                    };
+                } else {
+                    this.parseAndAppend(this.prepareAddition(fragment), true);
+                }
+
+                // Move down to the depths to the last object/array, which is current now
+                for (let i = this.lastFlushDepth || 1; i < this.flushDepth; i++) {
+                    let value = this.valueStack.value;
+
+                    if (this.stack[i - 1] === STACK_OBJECT) {
+                        // find last entry
+                        let key;
+                        // eslint-disable-next-line curly
+                        for (key in value);
+                        value = value[key];
+                    } else {
+                        // last element
+                        value = value[value.length - 1];
+                    }
+
+                    this.valueStack = {
+                        value,
+                        prev: this.valueStack
+                    };
+                }
+            } else /* this.flushDepth < this.lastFlushDepth */ {
+                fragment = this.prepareAddition(fragment);
+
+                // Add missed opening brackets/parentheses
+                for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
+                    this.jsonParseOffset--;
+                    fragment = (this.stack[i] === STACK_OBJECT ? '{' : '[') + fragment;
+                }
+
+                this.parseAndAppend(fragment, false);
+
+                for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
+                    this.valueStack = this.valueStack.prev;
+                }
+            }
+
+            this.lastFlushDepth = this.flushDepth;
+        }
+
+        push(chunk) {
+            if (typeof chunk !== 'string') {
+                // Suppose chunk is Buffer or Uint8Array
+
+                // Prepend uncompleted byte sequence if any
+                if (this.pendingByteSeq !== null) {
+                    const origRawChunk = chunk;
+                    chunk = new Uint8Array(this.pendingByteSeq.length + origRawChunk.length);
+                    chunk.set(this.pendingByteSeq);
+                    chunk.set(origRawChunk, this.pendingByteSeq.length);
+                    this.pendingByteSeq = null;
+                }
+
+                // In case Buffer/Uint8Array, an input is encoded in UTF8
+                // Seek for parts of uncompleted UTF8 symbol on the ending
+                // This makes sense only if we expect more chunks and last char is not multi-bytes
+                if (chunk[chunk.length - 1] > 127) {
+                    for (let seqLength = 0; seqLength < chunk.length; seqLength++) {
+                        const byte = chunk[chunk.length - 1 - seqLength];
+
+                        // 10xxxxxx - 2nd, 3rd or 4th byte
+                        // 110xxxxx – first byte of 2-byte sequence
+                        // 1110xxxx - first byte of 3-byte sequence
+                        // 11110xxx - first byte of 4-byte sequence
+                        if (byte >> 6 === 3) {
+                            seqLength++;
+
+                            // If the sequence is really incomplete, then preserve it
+                            // for the future chunk and cut off it from the current chunk
+                            if ((seqLength !== 4 && byte >> 3 === 0b11110) ||
+                                (seqLength !== 3 && byte >> 4 === 0b1110) ||
+                                (seqLength !== 2 && byte >> 5 === 0b110)) {
+                                this.pendingByteSeq = chunk.slice(chunk.length - seqLength);
+                                chunk = chunk.slice(0, -seqLength);
+                            }
+
+                            break;
+                        }
+                    }
+                }
+
+                // Convert chunk to a string, since single decode per chunk
+                // is much effective than decode multiple small substrings
+                chunk = decoder.decode(chunk);
+            }
+
+            const chunkLength = chunk.length;
+            let lastFlushPoint = 0;
+            let flushPoint = 0;
+
+            // Main scan loop
+            scan: for (let i = 0; i < chunkLength; i++) {
+                if (this.stateString) {
+                    for (; i < chunkLength; i++) {
+                        if (this.stateStringEscape) {
+                            this.stateStringEscape = false;
+                        } else {
+                            switch (chunk.charCodeAt(i)) {
+                                case 0x22: /* " */
+                                    this.stateString = false;
+                                    continue scan;
+
+                                case 0x5C: /* \ */
+                                    this.stateStringEscape = true;
+                            }
+                        }
+                    }
+
+                    break;
+                }
+
+                switch (chunk.charCodeAt(i)) {
+                    case 0x22: /* " */
+                        this.stateString = true;
+                        this.stateStringEscape = false;
+                        break;
+
+                    case 0x2C: /* , */
+                        flushPoint = i;
+                        break;
+
+                    case 0x7B: /* { */
+                        // Open an object
+                        flushPoint = i + 1;
+                        this.stack[this.flushDepth++] = STACK_OBJECT;
+                        break;
+
+                    case 0x5B: /* [ */
+                        // Open an array
+                        flushPoint = i + 1;
+                        this.stack[this.flushDepth++] = STACK_ARRAY;
+                        break;
+
+                    case 0x5D: /* ] */
+                    case 0x7D: /* } */
+                        // Close an object or array
+                        flushPoint = i + 1;
+                        this.flushDepth--;
+
+                        if (this.flushDepth < this.lastFlushDepth) {
+                            this.flush(chunk, lastFlushPoint, flushPoint);
+                            lastFlushPoint = flushPoint;
+                        }
+
+                        break;
+
+                    case 0x09: /* \t */
+                    case 0x0A: /* \n */
+                    case 0x0D: /* \r */
+                    case 0x20: /* space */
+                        // Move points forward when they points on current position and it's a whitespace
+                        if (lastFlushPoint === i) {
+                            lastFlushPoint++;
+                        }
+
+                        if (flushPoint === i) {
+                            flushPoint++;
+                        }
+
+                        break;
+                }
+            }
+
+            if (flushPoint > lastFlushPoint) {
+                this.flush(chunk, lastFlushPoint, flushPoint);
+            }
+
+            // Produce pendingChunk if something left
+            if (flushPoint < chunkLength) {
+                if (this.pendingChunk !== null) {
+                    // When there is already a pending chunk then no flush happened,
+                    // appending entire chunk to pending one
+                    this.pendingChunk += chunk;
+                } else {
+                    // Create a pending chunk, it will start with non-whitespace since
+                    // flushPoint was moved forward away from whitespaces on scan
+                    this.pendingChunk = chunk.slice(flushPoint, chunkLength);
+                }
+            }
+
+            this.chunkOffset += chunkLength;
+        }
+
+        finish() {
+            if (this.pendingChunk !== null) {
+                this.flush('', 0, 0);
+                this.pendingChunk = null;
+            }
+
+            return this.value;
+        }
+    }
+
+    var src = {
+        version: version,
+        stringifyInfo: stringifyInfo,
+        stringifyStream: stringifyStreamBrowser,
+        parseChunked: parseChunked
+    };
+
+    return src;
+
+}));

node_modules/@discoveryjs/json-ext/dist/version.js

@@ -0,0 +1 @@
+module.exports = "0.5.7";

node_modules/@discoveryjs/json-ext/index.d.ts

@@ -0,0 +1,31 @@
+declare module '@discoveryjs/json-ext' {
+    import { Readable } from 'stream';
+
+    type TReplacer =
+        | ((this: any, key: string, value: any) => any)
+        | string[]
+        | number[]
+        | null;
+    type TSpace = string | number | null;
+    type TChunk = string | Buffer | Uint8Array;
+
+    export function parseChunked(input: Readable): Promise<any>;
+    export function parseChunked(input: () => (Iterable<TChunk> | AsyncIterable<TChunk>)): Promise<any>;
+
+    export function stringifyStream(value: any, replacer?: TReplacer, space?: TSpace): Readable;
+
+    export function stringifyInfo(
+        value: any,
+        replacer?: TReplacer,
+        space?: TSpace,
+        options?: {
+            async?: boolean;
+            continueOnCircular?: boolean;
+        }
+    ): {
+        minLength: number;
+        circular: any[];
+        duplicate: any[];
+        async: any[];
+    };
+}

node_modules/@discoveryjs/json-ext/package.json

@@ -0,0 +1,56 @@
+{
+    "name": "@discoveryjs/json-ext",
+    "version": "0.5.7",
+    "description": "A set of utilities that extend the use of JSON",
+    "keywords": [
+        "json",
+        "utils",
+        "stream",
+        "async",
+        "promise",
+        "stringify",
+        "info"
+    ],
+    "author": "Roman Dvornov <rdvornov@gmail.com> (https://github.com/lahmatiy)",
+    "license": "MIT",
+    "repository": "discoveryjs/json-ext",
+    "main": "./src/index",
+    "browser": {
+        "./src/stringify-stream.js": "./src/stringify-stream-browser.js",
+        "./src/text-decoder.js": "./src/text-decoder-browser.js",
+        "./src/version.js": "./dist/version.js"
+    },
+    "types": "./index.d.ts",
+    "scripts": {
+        "test": "mocha --reporter progress",
+        "lint": "eslint src test",
+        "lint-and-test": "npm run lint && npm test",
+        "build": "rollup --config",
+        "test:all": "npm run test:src && npm run test:dist",
+        "test:src": "npm test",
+        "test:dist": "cross-env MODE=dist npm test && cross-env MODE=dist-min npm test",
+        "build-and-test": "npm run build && npm run test:dist",
+        "coverage": "c8 --reporter=lcovonly npm test",
+        "prepublishOnly": "npm run lint && npm test && npm run build-and-test"
+    },
+    "devDependencies": {
+        "@rollup/plugin-commonjs": "^15.1.0",
+        "@rollup/plugin-json": "^4.1.0",
+        "@rollup/plugin-node-resolve": "^9.0.0",
+        "c8": "^7.10.0",
+        "chalk": "^4.1.0",
+        "cross-env": "^7.0.3",
+        "eslint": "^8.10.0",
+        "mocha": "^8.4.0",
+        "rollup": "^2.28.2",
+        "rollup-plugin-terser": "^7.0.2"
+    },
+    "engines": {
+        "node": ">=10.0.0"
+    },
+    "files": [
+        "dist",
+        "src",
+        "index.d.ts"
+    ]
+}

node_modules/@discoveryjs/json-ext/src/index.js

@@ -0,0 +1,6 @@
+module.exports = {
+    version: require('./version'),
+    stringifyInfo: require('./stringify-info'),
+    stringifyStream: require('./stringify-stream'),
+    parseChunked: require('./parse-chunked')
+};

node_modules/@discoveryjs/json-ext/src/parse-chunked.js

@@ -0,0 +1,384 @@
+const { isReadableStream } = require('./utils');
+const TextDecoder = require('./text-decoder');
+
+const STACK_OBJECT = 1;
+const STACK_ARRAY = 2;
+const decoder = new TextDecoder();
+
+function isObject(value) {
+    return value !== null && typeof value === 'object';
+}
+
+function adjustPosition(error, parser) {
+    if (error.name === 'SyntaxError' && parser.jsonParseOffset) {
+        error.message = error.message.replace(/at position (\d+)/, (_, pos) =>
+            'at position ' + (Number(pos) + parser.jsonParseOffset)
+        );
+    }
+
+    return error;
+}
+
+function append(array, elements) {
+    // Note: Avoid to use array.push(...elements) since it may lead to
+    // "RangeError: Maximum call stack size exceeded" for a long arrays
+    const initialLength = array.length;
+    array.length += elements.length;
+
+    for (let i = 0; i < elements.length; i++) {
+        array[initialLength + i] = elements[i];
+    }
+}
+
+module.exports = function(chunkEmitter) {
+    let parser = new ChunkParser();
+
+    if (isObject(chunkEmitter) && isReadableStream(chunkEmitter)) {
+        return new Promise((resolve, reject) => {
+            chunkEmitter
+                .on('data', chunk => {
+                    try {
+                        parser.push(chunk);
+                    } catch (e) {
+                        reject(adjustPosition(e, parser));
+                        parser = null;
+                    }
+                })
+                .on('error', (e) => {
+                    parser = null;
+                    reject(e);
+                })
+                .on('end', () => {
+                    try {
+                        resolve(parser.finish());
+                    } catch (e) {
+                        reject(adjustPosition(e, parser));
+                    } finally {
+                        parser = null;
+                    }
+                });
+        });
+    }
+
+    if (typeof chunkEmitter === 'function') {
+        const iterator = chunkEmitter();
+
+        if (isObject(iterator) && (Symbol.iterator in iterator || Symbol.asyncIterator in iterator)) {
+            return new Promise(async (resolve, reject) => {
+                try {
+                    for await (const chunk of iterator) {
+                        parser.push(chunk);
+                    }
+
+                    resolve(parser.finish());
+                } catch (e) {
+                    reject(adjustPosition(e, parser));
+                } finally {
+                    parser = null;
+                }
+            });
+        }
+    }
+
+    throw new Error(
+        'Chunk emitter should be readable stream, generator, ' +
+        'async generator or function returning an iterable object'
+    );
+};
+
+class ChunkParser {
+    constructor() {
+        this.value = undefined;
+        this.valueStack = null;
+
+        this.stack = new Array(100);
+        this.lastFlushDepth = 0;
+        this.flushDepth = 0;
+        this.stateString = false;
+        this.stateStringEscape = false;
+        this.pendingByteSeq = null;
+        this.pendingChunk = null;
+        this.chunkOffset = 0;
+        this.jsonParseOffset = 0;
+    }
+
+    parseAndAppend(fragment, wrap) {
+        // Append new entries or elements
+        if (this.stack[this.lastFlushDepth - 1] === STACK_OBJECT) {
+            if (wrap) {
+                this.jsonParseOffset--;
+                fragment = '{' + fragment + '}';
+            }
+
+            Object.assign(this.valueStack.value, JSON.parse(fragment));
+        } else {
+            if (wrap) {
+                this.jsonParseOffset--;
+                fragment = '[' + fragment + ']';
+            }
+
+            append(this.valueStack.value, JSON.parse(fragment));
+        }
+    }
+
+    prepareAddition(fragment) {
+        const { value } = this.valueStack;
+        const expectComma = Array.isArray(value)
+            ? value.length !== 0
+            : Object.keys(value).length !== 0;
+
+        if (expectComma) {
+            // Skip a comma at the beginning of fragment, otherwise it would
+            // fail to parse
+            if (fragment[0] === ',') {
+                this.jsonParseOffset++;
+                return fragment.slice(1);
+            }
+
+            // When value (an object or array) is not empty and a fragment
+            // doesn't start with a comma, a single valid fragment starting
+            // is a closing bracket. If it's not, a prefix is adding to fail
+            // parsing. Otherwise, the sequence of chunks can be successfully
+            // parsed, although it should not, e.g. ["[{}", "{}]"]
+            if (fragment[0] !== '}' && fragment[0] !== ']') {
+                this.jsonParseOffset -= 3;
+                return '[[]' + fragment;
+            }
+        }
+
+        return fragment;
+    }
+
+    flush(chunk, start, end) {
+        let fragment = chunk.slice(start, end);
+
+        // Save position correction an error in JSON.parse() if any
+        this.jsonParseOffset = this.chunkOffset + start;
+
+        // Prepend pending chunk if any
+        if (this.pendingChunk !== null) {
+            fragment = this.pendingChunk + fragment;
+            this.jsonParseOffset -= this.pendingChunk.length;
+            this.pendingChunk = null;
+        }
+
+        if (this.flushDepth === this.lastFlushDepth) {
+            // Depth didn't changed, so it's a root value or entry/element set
+            if (this.flushDepth > 0) {
+                this.parseAndAppend(this.prepareAddition(fragment), true);
+            } else {
+                // That's an entire value on a top level
+                this.value = JSON.parse(fragment);
+                this.valueStack = {
+                    value: this.value,
+                    prev: null
+                };
+            }
+        } else if (this.flushDepth > this.lastFlushDepth) {
+            // Add missed closing brackets/parentheses
+            for (let i = this.flushDepth - 1; i >= this.lastFlushDepth; i--) {
+                fragment += this.stack[i] === STACK_OBJECT ? '}' : ']';
+            }
+
+            if (this.lastFlushDepth === 0) {
+                // That's a root value
+                this.value = JSON.parse(fragment);
+                this.valueStack = {
+                    value: this.value,
+                    prev: null
+                };
+            } else {
+                this.parseAndAppend(this.prepareAddition(fragment), true);
+            }
+
+            // Move down to the depths to the last object/array, which is current now
+            for (let i = this.lastFlushDepth || 1; i < this.flushDepth; i++) {
+                let value = this.valueStack.value;
+
+                if (this.stack[i - 1] === STACK_OBJECT) {
+                    // find last entry
+                    let key;
+                    // eslint-disable-next-line curly
+                    for (key in value);
+                    value = value[key];
+                } else {
+                    // last element
+                    value = value[value.length - 1];
+                }
+
+                this.valueStack = {
+                    value,
+                    prev: this.valueStack
+                };
+            }
+        } else /* this.flushDepth < this.lastFlushDepth */ {
+            fragment = this.prepareAddition(fragment);
+
+            // Add missed opening brackets/parentheses
+            for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
+                this.jsonParseOffset--;
+                fragment = (this.stack[i] === STACK_OBJECT ? '{' : '[') + fragment;
+            }
+
+            this.parseAndAppend(fragment, false);
+
+            for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
+                this.valueStack = this.valueStack.prev;
+            }
+        }
+
+        this.lastFlushDepth = this.flushDepth;
+    }
+
+    push(chunk) {
+        if (typeof chunk !== 'string') {
+            // Suppose chunk is Buffer or Uint8Array
+
+            // Prepend uncompleted byte sequence if any
+            if (this.pendingByteSeq !== null) {
+                const origRawChunk = chunk;
+                chunk = new Uint8Array(this.pendingByteSeq.length + origRawChunk.length);
+                chunk.set(this.pendingByteSeq);
+                chunk.set(origRawChunk, this.pendingByteSeq.length);
+                this.pendingByteSeq = null;
+            }
+
+            // In case Buffer/Uint8Array, an input is encoded in UTF8
+            // Seek for parts of uncompleted UTF8 symbol on the ending
+            // This makes sense only if we expect more chunks and last char is not multi-bytes
+            if (chunk[chunk.length - 1] > 127) {
+                for (let seqLength = 0; seqLength < chunk.length; seqLength++) {
+                    const byte = chunk[chunk.length - 1 - seqLength];
+
+                    // 10xxxxxx - 2nd, 3rd or 4th byte
+                    // 110xxxxx – first byte of 2-byte sequence
+                    // 1110xxxx - first byte of 3-byte sequence
+                    // 11110xxx - first byte of 4-byte sequence
+                    if (byte >> 6 === 3) {
+                        seqLength++;
+
+                        // If the sequence is really incomplete, then preserve it
+                        // for the future chunk and cut off it from the current chunk
+                        if ((seqLength !== 4 && byte >> 3 === 0b11110) ||
+                            (seqLength !== 3 && byte >> 4 === 0b1110) ||
+                            (seqLength !== 2 && byte >> 5 === 0b110)) {
+                            this.pendingByteSeq = chunk.slice(chunk.length - seqLength);
+                            chunk = chunk.slice(0, -seqLength);
+                        }
+
+                        break;
+                    }
+                }
+            }
+
+            // Convert chunk to a string, since single decode per chunk
+            // is much effective than decode multiple small substrings
+            chunk = decoder.decode(chunk);
+        }
+
+        const chunkLength = chunk.length;
+        let lastFlushPoint = 0;
+        let flushPoint = 0;
+
+        // Main scan loop
+        scan: for (let i = 0; i < chunkLength; i++) {
+            if (this.stateString) {
+                for (; i < chunkLength; i++) {
+                    if (this.stateStringEscape) {
+                        this.stateStringEscape = false;
+                    } else {
+                        switch (chunk.charCodeAt(i)) {
+                            case 0x22: /* " */
+                                this.stateString = false;
+                                continue scan;
+
+                            case 0x5C: /* \ */
+                                this.stateStringEscape = true;
+                        }
+                    }
+                }
+
+                break;
+            }
+
+            switch (chunk.charCodeAt(i)) {
+                case 0x22: /* " */
+                    this.stateString = true;
+                    this.stateStringEscape = false;
+                    break;
+
+                case 0x2C: /* , */
+                    flushPoint = i;
+                    break;
+
+                case 0x7B: /* { */
+                    // Open an object
+                    flushPoint = i + 1;
+                    this.stack[this.flushDepth++] = STACK_OBJECT;
+                    break;
+
+                case 0x5B: /* [ */
+                    // Open an array
+                    flushPoint = i + 1;
+                    this.stack[this.flushDepth++] = STACK_ARRAY;
+                    break;
+
+                case 0x5D: /* ] */
+                case 0x7D: /* } */
+                    // Close an object or array
+                    flushPoint = i + 1;
+                    this.flushDepth--;
+
+                    if (this.flushDepth < this.lastFlushDepth) {
+                        this.flush(chunk, lastFlushPoint, flushPoint);
+                        lastFlushPoint = flushPoint;
+                    }
+
+                    break;
+
+                case 0x09: /* \t */
+                case 0x0A: /* \n */
+                case 0x0D: /* \r */
+                case 0x20: /* space */
+                    // Move points forward when they points on current position and it's a whitespace
+                    if (lastFlushPoint === i) {
+                        lastFlushPoint++;
+                    }
+
+                    if (flushPoint === i) {
+                        flushPoint++;
+                    }
+
+                    break;
+            }
+        }
+
+        if (flushPoint > lastFlushPoint) {
+            this.flush(chunk, lastFlushPoint, flushPoint);
+        }
+
+        // Produce pendingChunk if something left
+        if (flushPoint < chunkLength) {
+            if (this.pendingChunk !== null) {
+                // When there is already a pending chunk then no flush happened,
+                // appending entire chunk to pending one
+                this.pendingChunk += chunk;
+            } else {
+                // Create a pending chunk, it will start with non-whitespace since
+                // flushPoint was moved forward away from whitespaces on scan
+                this.pendingChunk = chunk.slice(flushPoint, chunkLength);
+            }
+        }
+
+        this.chunkOffset += chunkLength;
+    }
+
+    finish() {
+        if (this.pendingChunk !== null) {
+            this.flush('', 0, 0);
+            this.pendingChunk = null;
+        }
+
+        return this.value;
+    }
+};

node_modules/@discoveryjs/json-ext/src/stringify-info.js

@@ -0,0 +1,231 @@
+const {
+    normalizeReplacer,
+    normalizeSpace,
+    replaceValue,
+    getTypeNative,
+    getTypeAsync,
+    isLeadingSurrogate,
+    isTrailingSurrogate,
+    escapableCharCodeSubstitution,
+    type: {
+        PRIMITIVE,
+        OBJECT,
+        ARRAY,
+        PROMISE,
+        STRING_STREAM,
+        OBJECT_STREAM
+    }
+} = require('./utils');
+const charLength2048 = Array.from({ length: 2048 }).map((_, code) => {
+    if (escapableCharCodeSubstitution.hasOwnProperty(code)) {
+        return 2; // \X
+    }
+
+    if (code < 0x20) {
+        return 6; // \uXXXX
+    }
+
+    return code < 128 ? 1 : 2; // UTF8 bytes
+});
+
+function stringLength(str) {
+    let len = 0;
+    let prevLeadingSurrogate = false;
+
+    for (let i = 0; i < str.length; i++) {
+        const code = str.charCodeAt(i);
+
+        if (code < 2048) {
+            len += charLength2048[code];
+        } else if (isLeadingSurrogate(code)) {
+            len += 6; // \uXXXX since no pair with trailing surrogate yet
+            prevLeadingSurrogate = true;
+            continue;
+        } else if (isTrailingSurrogate(code)) {
+            len = prevLeadingSurrogate
+                ? len - 2  // surrogate pair (4 bytes), since we calculate prev leading surrogate as 6 bytes, substruct 2 bytes
+                : len + 6; // \uXXXX
+        } else {
+            len += 3; // code >= 2048 is 3 bytes length for UTF8
+        }
+
+        prevLeadingSurrogate = false;
+    }
+
+    return len + 2; // +2 for quotes
+}
+
+function primitiveLength(value) {
+    switch (typeof value) {
+        case 'string':
+            return stringLength(value);
+
+        case 'number':
+            return Number.isFinite(value) ? String(value).length : 4 /* null */;
+
+        case 'boolean':
+            return value ? 4 /* true */ : 5 /* false */;
+
+        case 'undefined':
+        case 'object':
+            return 4; /* null */
+
+        default:
+            return 0;
+    }
+}
+
+function spaceLength(space) {
+    space = normalizeSpace(space);
+    return typeof space === 'string' ? space.length : 0;
+}
+
+module.exports = function jsonStringifyInfo(value, replacer, space, options) {
+    function walk(holder, key, value) {
+        if (stop) {
+            return;
+        }
+
+        value = replaceValue(holder, key, value, replacer);
+
+        let type = getType(value);
+
+        // check for circular structure
+        if (type !== PRIMITIVE && stack.has(value)) {
+            circular.add(value);
+            length += 4; // treat as null
+
+            if (!options.continueOnCircular) {
+                stop = true;
+            }
+
+            return;
+        }
+
+        switch (type) {
+            case PRIMITIVE:
+                if (value !== undefined || Array.isArray(holder)) {
+                    length += primitiveLength(value);
+                } else if (holder === root) {
+                    length += 9; // FIXME: that's the length of undefined, should we normalize behaviour to convert it to null?
+                }
+                break;
+
+            case OBJECT: {
+                if (visited.has(value)) {
+                    duplicate.add(value);
+                    length += visited.get(value);
+                    break;
+                }
+
+                const valueLength = length;
+                let entries = 0;
+
+                length += 2; // {}
+
+                stack.add(value);
+
+                for (const key in value) {
+                    if (hasOwnProperty.call(value, key) && (allowlist === null || allowlist.has(key))) {
+                        const prevLength = length;
+                        walk(value, key, value[key]);
+
+                        if (prevLength !== length) {
+                            // value is printed
+                            length += stringLength(key) + 1; // "key":
+                            entries++;
+                        }
+                    }
+                }
+
+                if (entries > 1) {
+                    length += entries - 1; // commas
+                }
+
+                stack.delete(value);
+
+                if (space > 0 && entries > 0) {
+                    length += (1 + (stack.size + 1) * space + 1) * entries; // for each key-value: \n{space}
+                    length += 1 + stack.size * space; // for }
+                }
+
+                visited.set(value, length - valueLength);
+
+                break;
+            }
+
+            case ARRAY: {
+                if (visited.has(value)) {
+                    duplicate.add(value);
+                    length += visited.get(value);
+                    break;
+                }
+
+                const valueLength = length;
+
+                length += 2; // []
+
+                stack.add(value);
+
+                for (let i = 0; i < value.length; i++) {
+                    walk(value, i, value[i]);
+                }
+
+                if (value.length > 1) {
+                    length += value.length - 1; // commas
+                }
+
+                stack.delete(value);
+
+                if (space > 0 && value.length > 0) {
+                    length += (1 + (stack.size + 1) * space) * value.length; // for each element: \n{space}
+                    length += 1 + stack.size * space; // for ]
+                }
+
+                visited.set(value, length - valueLength);
+
+                break;
+            }
+
+            case PROMISE:
+            case STRING_STREAM:
+                async.add(value);
+                break;
+
+            case OBJECT_STREAM:
+                length += 2; // []
+                async.add(value);
+                break;
+        }
+    }
+
+    let allowlist = null;
+    replacer = normalizeReplacer(replacer);
+
+    if (Array.isArray(replacer)) {
+        allowlist = new Set(replacer);
+        replacer = null;
+    }
+
+    space = spaceLength(space);
+    options = options || {};
+
+    const visited = new Map();
+    const stack = new Set();
+    const duplicate = new Set();
+    const circular = new Set();
+    const async = new Set();
+    const getType = options.async ? getTypeAsync : getTypeNative;
+    const root = { '': value };
+    let stop = false;
+    let length = 0;
+
+    walk(root, '', value);
+
+    return {
+        minLength: isNaN(length) ? Infinity : length,
+        circular: [...circular],
+        duplicate: [...duplicate],
+        async: [...async]
+    };
+};

node_modules/@discoveryjs/json-ext/src/stringify-stream-browser.js

@@ -0,0 +1,3 @@
+module.exports = () => {
+    throw new Error('Method is not supported');
+};

node_modules/@discoveryjs/json-ext/src/stringify-stream.js

@@ -0,0 +1,408 @@
+const { Readable } = require('stream');
+const {
+    normalizeReplacer,
+    normalizeSpace,
+    replaceValue,
+    getTypeAsync,
+    type: {
+        PRIMITIVE,
+        OBJECT,
+        ARRAY,
+        PROMISE,
+        STRING_STREAM,
+        OBJECT_STREAM
+    }
+} = require('./utils');
+const noop = () => {};
+const hasOwnProperty = Object.prototype.hasOwnProperty;
+
+// TODO: Remove when drop support for Node.js 10
+// Node.js 10 has no well-formed JSON.stringify()
+// https://github.com/tc39/proposal-well-formed-stringify
+// Adopted code from https://bugs.chromium.org/p/v8/issues/detail?id=7782#c12
+const wellformedStringStringify = JSON.stringify('\ud800') === '"\\ud800"'
+    ? JSON.stringify
+    : s => JSON.stringify(s).replace(
+        /\p{Surrogate}/gu,
+        m => `\\u${m.charCodeAt(0).toString(16)}`
+    );
+
+function push() {
+    this.push(this._stack.value);
+    this.popStack();
+}
+
+function pushPrimitive(value) {
+    switch (typeof value) {
+        case 'string':
+            this.push(this.encodeString(value));
+            break;
+
+        case 'number':
+            this.push(Number.isFinite(value) ? this.encodeNumber(value) : 'null');
+            break;
+
+        case 'boolean':
+            this.push(value ? 'true' : 'false');
+            break;
+
+        case 'undefined':
+        case 'object': // typeof null === 'object'
+            this.push('null');
+            break;
+
+        default:
+            this.destroy(new TypeError(`Do not know how to serialize a ${value.constructor && value.constructor.name || typeof value}`));
+    }
+}
+
+function processObjectEntry(key) {
+    const current = this._stack;
+
+    if (!current.first) {
+        current.first = true;
+    } else {
+        this.push(',');
+    }
+
+    if (this.space) {
+        this.push(`\n${this.space.repeat(this._depth)}${this.encodeString(key)}: `);
+    } else {
+        this.push(this.encodeString(key) + ':');
+    }
+}
+
+function processObject() {
+    const current = this._stack;
+
+    // when no keys left, remove obj from stack
+    if (current.index === current.keys.length) {
+        if (this.space && current.first) {
+            this.push(`\n${this.space.repeat(this._depth - 1)}}`);
+        } else {
+            this.push('}');
+        }
+
+        this.popStack();
+        return;
+    }
+
+    const key = current.keys[current.index];
+
+    this.processValue(current.value, key, current.value[key], processObjectEntry);
+    current.index++;
+}
+
+function processArrayItem(index) {
+    if (index !== 0) {
+        this.push(',');
+    }
+
+    if (this.space) {
+        this.push(`\n${this.space.repeat(this._depth)}`);
+    }
+}
+
+function processArray() {
+    const current = this._stack;
+
+    if (current.index === current.value.length) {
+        if (this.space && current.index > 0) {
+            this.push(`\n${this.space.repeat(this._depth - 1)}]`);
+        } else {
+            this.push(']');
+        }
+
+        this.popStack();
+        return;
+    }
+
+    this.processValue(current.value, current.index, current.value[current.index], processArrayItem);
+    current.index++;
+}
+
+function createStreamReader(fn) {
+    return function() {
+        const current = this._stack;
+        const data = current.value.read(this._readSize);
+
+        if (data !== null) {
+            current.first = false;
+            fn.call(this, data, current);
+        } else {
+            if ((current.first && !current.value._readableState.reading) || current.ended) {
+                this.popStack();
+            } else {
+                current.first = true;
+                current.awaiting = true;
+            }
+        }
+    };
+}
+
+const processReadableObject = createStreamReader(function(data, current) {
+    this.processValue(current.value, current.index, data, processArrayItem);
+    current.index++;
+});
+
+const processReadableString = createStreamReader(function(data) {
+    this.push(data);
+});
+
+class JsonStringifyStream extends Readable {
+    constructor(value, replacer, space) {
+        super({
+            autoDestroy: true
+        });
+
+        this.getKeys = Object.keys;
+        this.replacer = normalizeReplacer(replacer);
+
+        if (Array.isArray(this.replacer)) {
+            const allowlist = this.replacer;
+
+            this.getKeys = (value) => allowlist.filter(key => hasOwnProperty.call(value, key));
+            this.replacer = null;
+        }
+
+        this.space = normalizeSpace(space);
+        this._depth = 0;
+
+        this.error = null;
+        this._processing = false;
+        this._ended = false;
+
+        this._readSize = 0;
+        this._buffer = '';
+
+        this._stack = null;
+        this._visited = new WeakSet();
+
+        this.pushStack({
+            handler: () => {
+                this.popStack();
+                this.processValue({ '': value }, '', value, noop);
+            }
+        });
+    }
+
+    encodeString(value) {
+        if (/[^\x20-\uD799]|[\x22\x5c]/.test(value)) {
+            return wellformedStringStringify(value);
+        }
+
+        return '"' + value + '"';
+    }
+
+    encodeNumber(value) {
+        return value;
+    }
+
+    processValue(holder, key, value, callback) {
+        value = replaceValue(holder, key, value, this.replacer);
+
+        let type = getTypeAsync(value);
+
+        switch (type) {
+            case PRIMITIVE:
+                if (callback !== processObjectEntry || value !== undefined) {
+                    callback.call(this, key);
+                    pushPrimitive.call(this, value);
+                }
+                break;
+
+            case OBJECT:
+                callback.call(this, key);
+
+                // check for circular structure
+                if (this._visited.has(value)) {
+                    return this.destroy(new TypeError('Converting circular structure to JSON'));
+                }
+
+                this._visited.add(value);
+                this._depth++;
+                this.push('{');
+                this.pushStack({
+                    handler: processObject,
+                    value,
+                    index: 0,
+                    first: false,
+                    keys: this.getKeys(value)
+                });
+                break;
+
+            case ARRAY:
+                callback.call(this, key);
+
+                // check for circular structure
+                if (this._visited.has(value)) {
+                    return this.destroy(new TypeError('Converting circular structure to JSON'));
+                }
+
+                this._visited.add(value);
+
+                this.push('[');
+                this.pushStack({
+                    handler: processArray,
+                    value,
+                    index: 0
+                });
+                this._depth++;
+                break;
+
+            case PROMISE:
+                this.pushStack({
+                    handler: noop,
+                    awaiting: true
+                });
+
+                Promise.resolve(value)
+                    .then(resolved => {
+                        this.popStack();
+                        this.processValue(holder, key, resolved, callback);
+                        this.processStack();
+                    })
+                    .catch(error => {
+                        this.destroy(error);
+                    });
+                break;
+
+            case STRING_STREAM:
+            case OBJECT_STREAM:
+                callback.call(this, key);
+
+                // TODO: Remove when drop support for Node.js 10
+                // Used `_readableState.endEmitted` as fallback, since Node.js 10 has no `readableEnded` getter
+                if (value.readableEnded || value._readableState.endEmitted) {
+                    return this.destroy(new Error('Readable Stream has ended before it was serialized. All stream data have been lost'));
+                }
+
+                if (value.readableFlowing) {
+                    return this.destroy(new Error('Readable Stream is in flowing mode, data may have been lost. Trying to pause stream.'));
+                }
+
+                if (type === OBJECT_STREAM) {
+                    this.push('[');
+                    this.pushStack({
+                        handler: push,
+                        value: this.space ? '\n' + this.space.repeat(this._depth) + ']' : ']'
+                    });
+                    this._depth++;
+                }
+
+                const self = this.pushStack({
+                    handler: type === OBJECT_STREAM ? processReadableObject : processReadableString,
+                    value,
+                    index: 0,
+                    first: false,
+                    ended: false,
+                    awaiting: !value.readable || value.readableLength === 0
+                });
+                const continueProcessing = () => {
+                    if (self.awaiting) {
+                        self.awaiting = false;
+                        this.processStack();
+                    }
+                };
+
+                value.once('error', error => this.destroy(error));
+                value.once('end', () => {
+                    self.ended = true;
+                    continueProcessing();
+                });
+                value.on('readable', continueProcessing);
+                break;
+        }
+    }
+
+    pushStack(node) {
+        node.prev = this._stack;
+        return this._stack = node;
+    }
+
+    popStack() {
+        const { handler, value } = this._stack;
+
+        if (handler === processObject || handler === processArray || handler === processReadableObject) {
+            this._visited.delete(value);
+            this._depth--;
+        }
+
+        this._stack = this._stack.prev;
+    }
+
+    processStack() {
+        if (this._processing || this._ended) {
+            return;
+        }
+
+        try {
+            this._processing = true;
+
+            while (this._stack !== null && !this._stack.awaiting) {
+                this._stack.handler.call(this);
+
+                if (!this._processing) {
+                    return;
+                }
+            }
+
+            this._processing = false;
+        } catch (error) {
+            this.destroy(error);
+            return;
+        }
+
+        if (this._stack === null && !this._ended) {
+            this._finish();
+            this.push(null);
+        }
+    }
+
+    push(data) {
+        if (data !== null) {
+            this._buffer += data;
+
+            // check buffer overflow
+            if (this._buffer.length < this._readSize) {
+                return;
+            }
+
+            // flush buffer
+            data = this._buffer;
+            this._buffer = '';
+            this._processing = false;
+        }
+
+        super.push(data);
+    }
+
+    _read(size) {
+        // start processing
+        this._readSize = size || this.readableHighWaterMark;
+        this.processStack();
+    }
+
+    _finish() {
+        this._ended = true;
+        this._processing = false;
+        this._stack = null;
+        this._visited = null;
+
+        if (this._buffer && this._buffer.length) {
+            super.push(this._buffer); // flush buffer
+        }
+
+        this._buffer = '';
+    }
+
+    _destroy(error, cb) {
+        this.error = this.error || error;
+        this._finish();
+        cb(error);
+    }
+}
+
+module.exports = function createJsonStringifyStream(value, replacer, space) {
+    return new JsonStringifyStream(value, replacer, space);
+};

node_modules/@discoveryjs/json-ext/src/text-decoder-browser.js

@@ -0,0 +1 @@
+module.exports = TextDecoder;

node_modules/@discoveryjs/json-ext/src/text-decoder.js

@@ -0,0 +1 @@
+module.exports = require('util').TextDecoder;

node_modules/@discoveryjs/json-ext/src/utils.js

@@ -0,0 +1,149 @@
+const PrimitiveType = 1;
+const ObjectType = 2;
+const ArrayType = 3;
+const PromiseType = 4;
+const ReadableStringType = 5;
+const ReadableObjectType = 6;
+// https://tc39.es/ecma262/#table-json-single-character-escapes
+const escapableCharCodeSubstitution = { // JSON Single Character Escape Sequences
+    0x08: '\\b',
+    0x09: '\\t',
+    0x0a: '\\n',
+    0x0c: '\\f',
+    0x0d: '\\r',
+    0x22: '\\\"',
+    0x5c: '\\\\'
+};
+
+function isLeadingSurrogate(code) {
+    return code >= 0xD800 && code <= 0xDBFF;
+}
+
+function isTrailingSurrogate(code) {
+    return code >= 0xDC00 && code <= 0xDFFF;
+}
+
+function isReadableStream(value) {
+    return (
+        typeof value.pipe === 'function' &&
+        typeof value._read === 'function' &&
+        typeof value._readableState === 'object' && value._readableState !== null
+    );
+}
+
+function replaceValue(holder, key, value, replacer) {
+    if (value && typeof value.toJSON === 'function') {
+        value = value.toJSON();
+    }
+
+    if (replacer !== null) {
+        value = replacer.call(holder, String(key), value);
+    }
+
+    switch (typeof value) {
+        case 'function':
+        case 'symbol':
+            value = undefined;
+            break;
+
+        case 'object':
+            if (value !== null) {
+                const cls = value.constructor;
+                if (cls === String || cls === Number || cls === Boolean) {
+                    value = value.valueOf();
+                }
+            }
+            break;
+    }
+
+    return value;
+}
+
+function getTypeNative(value) {
+    if (value === null || typeof value !== 'object') {
+        return PrimitiveType;
+    }
+
+    if (Array.isArray(value)) {
+        return ArrayType;
+    }
+
+    return ObjectType;
+}
+
+function getTypeAsync(value) {
+    if (value === null || typeof value !== 'object') {
+        return PrimitiveType;
+    }
+
+    if (typeof value.then === 'function') {
+        return PromiseType;
+    }
+
+    if (isReadableStream(value)) {
+        return value._readableState.objectMode ? ReadableObjectType : ReadableStringType;
+    }
+
+    if (Array.isArray(value)) {
+        return ArrayType;
+    }
+
+    return ObjectType;
+}
+
+function normalizeReplacer(replacer) {
+    if (typeof replacer === 'function') {
+        return replacer;
+    }
+
+    if (Array.isArray(replacer)) {
+        const allowlist = new Set(replacer
+            .map(item => {
+                const cls = item && item.constructor;
+                return cls === String || cls === Number ? String(item) : null;
+            })
+            .filter(item => typeof item === 'string')
+        );
+
+        return [...allowlist];
+    }
+
+    return null;
+}
+
+function normalizeSpace(space) {
+    if (typeof space === 'number') {
+        if (!Number.isFinite(space) || space < 1) {
+            return false;
+        }
+
+        return ' '.repeat(Math.min(space, 10));
+    }
+
+    if (typeof space === 'string') {
+        return space.slice(0, 10) || false;
+    }
+
+    return false;
+}
+
+module.exports = {
+    escapableCharCodeSubstitution,
+    isLeadingSurrogate,
+    isTrailingSurrogate,
+    type: {
+        PRIMITIVE: PrimitiveType,
+        PROMISE: PromiseType,
+        ARRAY: ArrayType,
+        OBJECT: ObjectType,
+        STRING_STREAM: ReadableStringType,
+        OBJECT_STREAM: ReadableObjectType
+    },
+
+    isReadableStream,
+    replaceValue,
+    getTypeNative,
+    getTypeAsync,
+    normalizeReplacer,
+    normalizeSpace
+};

node_modules/@discoveryjs/json-ext/src/version.js

@@ -0,0 +1 @@
+module.exports = require('../package.json').version;

node_modules/@eslint-community/eslint-utils/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Toru Nagashima
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/@eslint-community/eslint-utils/README.md

@@ -0,0 +1,37 @@
+# @eslint-community/eslint-utils
+
+[![npm version](https://img.shields.io/npm/v/@eslint-community/eslint-utils.svg)](https://www.npmjs.com/package/@eslint-community/eslint-utils)
+[![Downloads/month](https://img.shields.io/npm/dm/@eslint-community/eslint-utils.svg)](http://www.npmtrends.com/@eslint-community/eslint-utils)
+[![Build Status](https://github.com/eslint-community/eslint-utils/workflows/CI/badge.svg)](https://github.com/eslint-community/eslint-utils/actions)
+[![Coverage Status](https://codecov.io/gh/eslint-community/eslint-utils/branch/main/graph/badge.svg)](https://codecov.io/gh/eslint-community/eslint-utils)
+
+## 🏁 Goal
+
+This package provides utility functions and classes for make ESLint custom rules.
+
+For examples:
+
+-   [`getStaticValue`](https://eslint-community.github.io/eslint-utils/api/ast-utils.html#getstaticvalue) evaluates static value on AST.
+-   [`ReferenceTracker`](https://eslint-community.github.io/eslint-utils/api/scope-utils.html#referencetracker-class) checks the members of modules/globals as handling assignments and destructuring.
+
+## 📖 Usage
+
+See [documentation](https://eslint-community.github.io/eslint-utils).
+
+## 📰 Changelog
+
+See [releases](https://github.com/eslint-community/eslint-utils/releases).
+
+## ❤️ Contributing
+
+Welcome contributing!
+
+Please use GitHub's Issues/PRs.
+
+### Development Tools
+
+-   `npm test` runs tests and measures coverage.
+-   `npm run clean` removes the coverage result of `npm test` command.
+-   `npm run coverage` shows the coverage result of the last `npm test` command.
+-   `npm run lint` runs ESLint.
+-   `npm run watch` runs tests on each file change.

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
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node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/README.md

@@ -0,0 +1,105 @@
+# eslint-visitor-keys
+
+[![npm version](https://img.shields.io/npm/v/eslint-visitor-keys.svg)](https://www.npmjs.com/package/eslint-visitor-keys)
+[![Downloads/month](https://img.shields.io/npm/dm/eslint-visitor-keys.svg)](http://www.npmtrends.com/eslint-visitor-keys)
+[![Build Status](https://github.com/eslint/eslint-visitor-keys/workflows/CI/badge.svg)](https://github.com/eslint/eslint-visitor-keys/actions)
+
+Constants and utilities about visitor keys to traverse AST.
+
+## 💿 Installation
+
+Use [npm] to install.
+
+```bash
+$ npm install eslint-visitor-keys
+```
+
+### Requirements
+
+- [Node.js] `^12.22.0`, `^14.17.0`, or `>=16.0.0`
+
+
+## 📖 Usage
+
+To use in an ESM file:
+
+```js
+import * as evk from "eslint-visitor-keys"
+```
+
+To use in a CommonJS file:
+
+```js
+const evk = require("eslint-visitor-keys")
+```
+
+### evk.KEYS
+
+> type: `{ [type: string]: string[] | undefined }`
+
+Visitor keys. This keys are frozen.
+
+This is an object. Keys are the type of [ESTree] nodes. Their values are an array of property names which have child nodes.
+
+For example:
+
+```
+console.log(evk.KEYS.AssignmentExpression) // → ["left", "right"]
+```
+
+### evk.getKeys(node)
+
+> type: `(node: object) => string[]`
+
+Get the visitor keys of a given AST node.
+
+This is similar to `Object.keys(node)` of ES Standard, but some keys are excluded: `parent`, `leadingComments`, `trailingComments`, and names which start with `_`.
+
+This will be used to traverse unknown nodes.
+
+For example:
+
+```js
+const node = {
+    type: "AssignmentExpression",
+    left: { type: "Identifier", name: "foo" },
+    right: { type: "Literal", value: 0 }
+}
+console.log(evk.getKeys(node)) // → ["type", "left", "right"]
+```
+
+### evk.unionWith(additionalKeys)
+
+> type: `(additionalKeys: object) => { [type: string]: string[] | undefined }`
+
+Make the union set with `evk.KEYS` and the given keys.
+
+- The order of keys is, `additionalKeys` is at first, then `evk.KEYS` is concatenated after that.
+- It removes duplicated keys as keeping the first one.
+
+For example:
+
+```js
+console.log(evk.unionWith({
+    MethodDefinition: ["decorators"]
+})) // → { ..., MethodDefinition: ["decorators", "key", "value"], ... }
+```
+
+## 📰 Change log
+
+See [GitHub releases](https://github.com/eslint/eslint-visitor-keys/releases).
+
+## 🍻 Contributing
+
+Welcome. See [ESLint contribution guidelines](https://eslint.org/docs/developer-guide/contributing/).
+
+### Development commands
+
+- `npm test` runs tests and measures code coverage.
+- `npm run lint` checks source codes with ESLint.
+- `npm run test:open-coverage` opens the code coverage report of the previous test with your default browser.
+
+
+[npm]: https://www.npmjs.com/
+[Node.js]: https://nodejs.org/
+[ESTree]: https://github.com/estree/estree

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/dist/eslint-visitor-keys.cjs

@@ -0,0 +1,384 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+/**
+ * @typedef {{ readonly [type: string]: ReadonlyArray<string> }} VisitorKeys
+ */
+
+/**
+ * @type {VisitorKeys}
+ */
+const KEYS = {
+    ArrayExpression: [
+        "elements"
+    ],
+    ArrayPattern: [
+        "elements"
+    ],
+    ArrowFunctionExpression: [
+        "params",
+        "body"
+    ],
+    AssignmentExpression: [
+        "left",
+        "right"
+    ],
+    AssignmentPattern: [
+        "left",
+        "right"
+    ],
+    AwaitExpression: [
+        "argument"
+    ],
+    BinaryExpression: [
+        "left",
+        "right"
+    ],
+    BlockStatement: [
+        "body"
+    ],
+    BreakStatement: [
+        "label"
+    ],
+    CallExpression: [
+        "callee",
+        "arguments"
+    ],
+    CatchClause: [
+        "param",
+        "body"
+    ],
+    ChainExpression: [
+        "expression"
+    ],
+    ClassBody: [
+        "body"
+    ],
+    ClassDeclaration: [
+        "id",
+        "superClass",
+        "body"
+    ],
+    ClassExpression: [
+        "id",
+        "superClass",
+        "body"
+    ],
+    ConditionalExpression: [
+        "test",
+        "consequent",
+        "alternate"
+    ],
+    ContinueStatement: [
+        "label"
+    ],
+    DebuggerStatement: [],
+    DoWhileStatement: [
+        "body",
+        "test"
+    ],
+    EmptyStatement: [],
+    ExperimentalRestProperty: [
+        "argument"
+    ],
+    ExperimentalSpreadProperty: [
+        "argument"
+    ],
+    ExportAllDeclaration: [
+        "exported",
+        "source"
+    ],
+    ExportDefaultDeclaration: [
+        "declaration"
+    ],
+    ExportNamedDeclaration: [
+        "declaration",
+        "specifiers",
+        "source"
+    ],
+    ExportSpecifier: [
+        "exported",
+        "local"
+    ],
+    ExpressionStatement: [
+        "expression"
+    ],
+    ForInStatement: [
+        "left",
+        "right",
+        "body"
+    ],
+    ForOfStatement: [
+        "left",
+        "right",
+        "body"
+    ],
+    ForStatement: [
+        "init",
+        "test",
+        "update",
+        "body"
+    ],
+    FunctionDeclaration: [
+        "id",
+        "params",
+        "body"
+    ],
+    FunctionExpression: [
+        "id",
+        "params",
+        "body"
+    ],
+    Identifier: [],
+    IfStatement: [
+        "test",
+        "consequent",
+        "alternate"
+    ],
+    ImportDeclaration: [
+        "specifiers",
+        "source"
+    ],
+    ImportDefaultSpecifier: [
+        "local"
+    ],
+    ImportExpression: [
+        "source"
+    ],
+    ImportNamespaceSpecifier: [
+        "local"
+    ],
+    ImportSpecifier: [
+        "imported",
+        "local"
+    ],
+    JSXAttribute: [
+        "name",
+        "value"
+    ],
+    JSXClosingElement: [
+        "name"
+    ],
+    JSXClosingFragment: [],
+    JSXElement: [
+        "openingElement",
+        "children",
+        "closingElement"
+    ],
+    JSXEmptyExpression: [],
+    JSXExpressionContainer: [
+        "expression"
+    ],
+    JSXFragment: [
+        "openingFragment",
+        "children",
+        "closingFragment"
+    ],
+    JSXIdentifier: [],
+    JSXMemberExpression: [
+        "object",
+        "property"
+    ],
+    JSXNamespacedName: [
+        "namespace",
+        "name"
+    ],
+    JSXOpeningElement: [
+        "name",
+        "attributes"
+    ],
+    JSXOpeningFragment: [],
+    JSXSpreadAttribute: [
+        "argument"
+    ],
+    JSXSpreadChild: [
+        "expression"
+    ],
+    JSXText: [],
+    LabeledStatement: [
+        "label",
+        "body"
+    ],
+    Literal: [],
+    LogicalExpression: [
+        "left",
+        "right"
+    ],
+    MemberExpression: [
+        "object",
+        "property"
+    ],
+    MetaProperty: [
+        "meta",
+        "property"
+    ],
+    MethodDefinition: [
+        "key",
+        "value"
+    ],
+    NewExpression: [
+        "callee",
+        "arguments"
+    ],
+    ObjectExpression: [
+        "properties"
+    ],
+    ObjectPattern: [
+        "properties"
+    ],
+    PrivateIdentifier: [],
+    Program: [
+        "body"
+    ],
+    Property: [
+        "key",
+        "value"
+    ],
+    PropertyDefinition: [
+        "key",
+        "value"
+    ],
+    RestElement: [
+        "argument"
+    ],
+    ReturnStatement: [
+        "argument"
+    ],
+    SequenceExpression: [
+        "expressions"
+    ],
+    SpreadElement: [
+        "argument"
+    ],
+    StaticBlock: [
+        "body"
+    ],
+    Super: [],
+    SwitchCase: [
+        "test",
+        "consequent"
+    ],
+    SwitchStatement: [
+        "discriminant",
+        "cases"
+    ],
+    TaggedTemplateExpression: [
+        "tag",
+        "quasi"
+    ],
+    TemplateElement: [],
+    TemplateLiteral: [
+        "quasis",
+        "expressions"
+    ],
+    ThisExpression: [],
+    ThrowStatement: [
+        "argument"
+    ],
+    TryStatement: [
+        "block",
+        "handler",
+        "finalizer"
+    ],
+    UnaryExpression: [
+        "argument"
+    ],
+    UpdateExpression: [
+        "argument"
+    ],
+    VariableDeclaration: [
+        "declarations"
+    ],
+    VariableDeclarator: [
+        "id",
+        "init"
+    ],
+    WhileStatement: [
+        "test",
+        "body"
+    ],
+    WithStatement: [
+        "object",
+        "body"
+    ],
+    YieldExpression: [
+        "argument"
+    ]
+};
+
+// Types.
+const NODE_TYPES = Object.keys(KEYS);
+
+// Freeze the keys.
+for (const type of NODE_TYPES) {
+    Object.freeze(KEYS[type]);
+}
+Object.freeze(KEYS);
+
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+
+/**
+ * @typedef {import('./visitor-keys.js').VisitorKeys} VisitorKeys
+ */
+
+// List to ignore keys.
+const KEY_BLACKLIST = new Set([
+    "parent",
+    "leadingComments",
+    "trailingComments"
+]);
+
+/**
+ * Check whether a given key should be used or not.
+ * @param {string} key The key to check.
+ * @returns {boolean} `true` if the key should be used.
+ */
+function filterKey(key) {
+    return !KEY_BLACKLIST.has(key) && key[0] !== "_";
+}
+
+/**
+ * Get visitor keys of a given node.
+ * @param {object} node The AST node to get keys.
+ * @returns {readonly string[]} Visitor keys of the node.
+ */
+function getKeys(node) {
+    return Object.keys(node).filter(filterKey);
+}
+
+// Disable valid-jsdoc rule because it reports syntax error on the type of @returns.
+// eslint-disable-next-line valid-jsdoc
+/**
+ * Make the union set with `KEYS` and given keys.
+ * @param {VisitorKeys} additionalKeys The additional keys.
+ * @returns {VisitorKeys} The union set.
+ */
+function unionWith(additionalKeys) {
+    const retv = /** @type {{
+        [type: string]: ReadonlyArray<string>
+    }} */ (Object.assign({}, KEYS));
+
+    for (const type of Object.keys(additionalKeys)) {
+        if (Object.prototype.hasOwnProperty.call(retv, type)) {
+            const keys = new Set(additionalKeys[type]);
+
+            for (const key of retv[type]) {
+                keys.add(key);
+            }
+
+            retv[type] = Object.freeze(Array.from(keys));
+        } else {
+            retv[type] = Object.freeze(Array.from(additionalKeys[type]));
+        }
+    }
+
+    return Object.freeze(retv);
+}
+
+exports.KEYS = KEYS;
+exports.getKeys = getKeys;
+exports.unionWith = unionWith;

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/dist/eslint-visitor-keys.d.cts

@@ -0,0 +1,27 @@
+type VisitorKeys$1 = {
+    readonly [type: string]: readonly string[];
+};
+/**
+ * @typedef {{ readonly [type: string]: ReadonlyArray<string> }} VisitorKeys
+ */
+/**
+ * @type {VisitorKeys}
+ */
+declare const KEYS: VisitorKeys$1;
+
+/**
+ * Get visitor keys of a given node.
+ * @param {object} node The AST node to get keys.
+ * @returns {readonly string[]} Visitor keys of the node.
+ */
+declare function getKeys(node: object): readonly string[];
+/**
+ * Make the union set with `KEYS` and given keys.
+ * @param {VisitorKeys} additionalKeys The additional keys.
+ * @returns {VisitorKeys} The union set.
+ */
+declare function unionWith(additionalKeys: VisitorKeys): VisitorKeys;
+
+type VisitorKeys = VisitorKeys$1;
+
+export { KEYS, VisitorKeys, getKeys, unionWith };

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/dist/index.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Get visitor keys of a given node.
+ * @param {object} node The AST node to get keys.
+ * @returns {readonly string[]} Visitor keys of the node.
+ */
+export function getKeys(node: object): readonly string[];
+/**
+ * Make the union set with `KEYS` and given keys.
+ * @param {VisitorKeys} additionalKeys The additional keys.
+ * @returns {VisitorKeys} The union set.
+ */
+export function unionWith(additionalKeys: VisitorKeys): VisitorKeys;
+export { KEYS };
+export type VisitorKeys = import('./visitor-keys.js').VisitorKeys;
+import KEYS from "./visitor-keys.js";
+//# sourceMappingURL=index.d.ts.map

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/dist/visitor-keys.d.ts

@@ -0,0 +1,12 @@
+export default KEYS;
+export type VisitorKeys = {
+    readonly [type: string]: readonly string[];
+};
+/**
+ * @typedef {{ readonly [type: string]: ReadonlyArray<string> }} VisitorKeys
+ */
+/**
+ * @type {VisitorKeys}
+ */
+declare const KEYS: VisitorKeys;
+//# sourceMappingURL=visitor-keys.d.ts.map

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/lib/index.js

@@ -0,0 +1,65 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+import KEYS from "./visitor-keys.js";
+
+/**
+ * @typedef {import('./visitor-keys.js').VisitorKeys} VisitorKeys
+ */
+
+// List to ignore keys.
+const KEY_BLACKLIST = new Set([
+    "parent",
+    "leadingComments",
+    "trailingComments"
+]);
+
+/**
+ * Check whether a given key should be used or not.
+ * @param {string} key The key to check.
+ * @returns {boolean} `true` if the key should be used.
+ */
+function filterKey(key) {
+    return !KEY_BLACKLIST.has(key) && key[0] !== "_";
+}
+
+/**
+ * Get visitor keys of a given node.
+ * @param {object} node The AST node to get keys.
+ * @returns {readonly string[]} Visitor keys of the node.
+ */
+export function getKeys(node) {
+    return Object.keys(node).filter(filterKey);
+}
+
+// Disable valid-jsdoc rule because it reports syntax error on the type of @returns.
+// eslint-disable-next-line valid-jsdoc
+/**
+ * Make the union set with `KEYS` and given keys.
+ * @param {VisitorKeys} additionalKeys The additional keys.
+ * @returns {VisitorKeys} The union set.
+ */
+export function unionWith(additionalKeys) {
+    const retv = /** @type {{
+        [type: string]: ReadonlyArray<string>
+    }} */ (Object.assign({}, KEYS));
+
+    for (const type of Object.keys(additionalKeys)) {
+        if (Object.prototype.hasOwnProperty.call(retv, type)) {
+            const keys = new Set(additionalKeys[type]);
+
+            for (const key of retv[type]) {
+                keys.add(key);
+            }
+
+            retv[type] = Object.freeze(Array.from(keys));
+        } else {
+            retv[type] = Object.freeze(Array.from(additionalKeys[type]));
+        }
+    }
+
+    return Object.freeze(retv);
+}
+
+export { KEYS };

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/lib/visitor-keys.js

@@ -0,0 +1,315 @@
+/**
+ * @typedef {{ readonly [type: string]: ReadonlyArray<string> }} VisitorKeys
+ */
+
+/**
+ * @type {VisitorKeys}
+ */
+const KEYS = {
+    ArrayExpression: [
+        "elements"
+    ],
+    ArrayPattern: [
+        "elements"
+    ],
+    ArrowFunctionExpression: [
+        "params",
+        "body"
+    ],
+    AssignmentExpression: [
+        "left",
+        "right"
+    ],
+    AssignmentPattern: [
+        "left",
+        "right"
+    ],
+    AwaitExpression: [
+        "argument"
+    ],
+    BinaryExpression: [
+        "left",
+        "right"
+    ],
+    BlockStatement: [
+        "body"
+    ],
+    BreakStatement: [
+        "label"
+    ],
+    CallExpression: [
+        "callee",
+        "arguments"
+    ],
+    CatchClause: [
+        "param",
+        "body"
+    ],
+    ChainExpression: [
+        "expression"
+    ],
+    ClassBody: [
+        "body"
+    ],
+    ClassDeclaration: [
+        "id",
+        "superClass",
+        "body"
+    ],
+    ClassExpression: [
+        "id",
+        "superClass",
+        "body"
+    ],
+    ConditionalExpression: [
+        "test",
+        "consequent",
+        "alternate"
+    ],
+    ContinueStatement: [
+        "label"
+    ],
+    DebuggerStatement: [],
+    DoWhileStatement: [
+        "body",
+        "test"
+    ],
+    EmptyStatement: [],
+    ExperimentalRestProperty: [
+        "argument"
+    ],
+    ExperimentalSpreadProperty: [
+        "argument"
+    ],
+    ExportAllDeclaration: [
+        "exported",
+        "source"
+    ],
+    ExportDefaultDeclaration: [
+        "declaration"
+    ],
+    ExportNamedDeclaration: [
+        "declaration",
+        "specifiers",
+        "source"
+    ],
+    ExportSpecifier: [
+        "exported",
+        "local"
+    ],
+    ExpressionStatement: [
+        "expression"
+    ],
+    ForInStatement: [
+        "left",
+        "right",
+        "body"
+    ],
+    ForOfStatement: [
+        "left",
+        "right",
+        "body"
+    ],
+    ForStatement: [
+        "init",
+        "test",
+        "update",
+        "body"
+    ],
+    FunctionDeclaration: [
+        "id",
+        "params",
+        "body"
+    ],
+    FunctionExpression: [
+        "id",
+        "params",
+        "body"
+    ],
+    Identifier: [],
+    IfStatement: [
+        "test",
+        "consequent",
+        "alternate"
+    ],
+    ImportDeclaration: [
+        "specifiers",
+        "source"
+    ],
+    ImportDefaultSpecifier: [
+        "local"
+    ],
+    ImportExpression: [
+        "source"
+    ],
+    ImportNamespaceSpecifier: [
+        "local"
+    ],
+    ImportSpecifier: [
+        "imported",
+        "local"
+    ],
+    JSXAttribute: [
+        "name",
+        "value"
+    ],
+    JSXClosingElement: [
+        "name"
+    ],
+    JSXClosingFragment: [],
+    JSXElement: [
+        "openingElement",
+        "children",
+        "closingElement"
+    ],
+    JSXEmptyExpression: [],
+    JSXExpressionContainer: [
+        "expression"
+    ],
+    JSXFragment: [
+        "openingFragment",
+        "children",
+        "closingFragment"
+    ],
+    JSXIdentifier: [],
+    JSXMemberExpression: [
+        "object",
+        "property"
+    ],
+    JSXNamespacedName: [
+        "namespace",
+        "name"
+    ],
+    JSXOpeningElement: [
+        "name",
+        "attributes"
+    ],
+    JSXOpeningFragment: [],
+    JSXSpreadAttribute: [
+        "argument"
+    ],
+    JSXSpreadChild: [
+        "expression"
+    ],
+    JSXText: [],
+    LabeledStatement: [
+        "label",
+        "body"
+    ],
+    Literal: [],
+    LogicalExpression: [
+        "left",
+        "right"
+    ],
+    MemberExpression: [
+        "object",
+        "property"
+    ],
+    MetaProperty: [
+        "meta",
+        "property"
+    ],
+    MethodDefinition: [
+        "key",
+        "value"
+    ],
+    NewExpression: [
+        "callee",
+        "arguments"
+    ],
+    ObjectExpression: [
+        "properties"
+    ],
+    ObjectPattern: [
+        "properties"
+    ],
+    PrivateIdentifier: [],
+    Program: [
+        "body"
+    ],
+    Property: [
+        "key",
+        "value"
+    ],
+    PropertyDefinition: [
+        "key",
+        "value"
+    ],
+    RestElement: [
+        "argument"
+    ],
+    ReturnStatement: [
+        "argument"
+    ],
+    SequenceExpression: [
+        "expressions"
+    ],
+    SpreadElement: [
+        "argument"
+    ],
+    StaticBlock: [
+        "body"
+    ],
+    Super: [],
+    SwitchCase: [
+        "test",
+        "consequent"
+    ],
+    SwitchStatement: [
+        "discriminant",
+        "cases"
+    ],
+    TaggedTemplateExpression: [
+        "tag",
+        "quasi"
+    ],
+    TemplateElement: [],
+    TemplateLiteral: [
+        "quasis",
+        "expressions"
+    ],
+    ThisExpression: [],
+    ThrowStatement: [
+        "argument"
+    ],
+    TryStatement: [
+        "block",
+        "handler",
+        "finalizer"
+    ],
+    UnaryExpression: [
+        "argument"
+    ],
+    UpdateExpression: [
+        "argument"
+    ],
+    VariableDeclaration: [
+        "declarations"
+    ],
+    VariableDeclarator: [
+        "id",
+        "init"
+    ],
+    WhileStatement: [
+        "test",
+        "body"
+    ],
+    WithStatement: [
+        "object",
+        "body"
+    ],
+    YieldExpression: [
+        "argument"
+    ]
+};
+
+// Types.
+const NODE_TYPES = Object.keys(KEYS);
+
+// Freeze the keys.
+for (const type of NODE_TYPES) {
+    Object.freeze(KEYS[type]);
+}
+Object.freeze(KEYS);
+
+export default KEYS;

node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys/package.json

@@ -0,0 +1,74 @@
+{
+  "name": "eslint-visitor-keys",
+  "version": "3.4.3",
+  "description": "Constants and utilities about visitor keys to traverse AST.",
+  "type": "module",
+  "main": "dist/eslint-visitor-keys.cjs",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": [
+      {
+        "import": "./lib/index.js",
+        "require": "./dist/eslint-visitor-keys.cjs"
+      },
+      "./dist/eslint-visitor-keys.cjs"
+    ],
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "dist/index.d.ts",
+    "dist/visitor-keys.d.ts",
+    "dist/eslint-visitor-keys.cjs",
+    "dist/eslint-visitor-keys.d.cts",
+    "lib"
+  ],
+  "engines": {
+    "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+  },
+  "devDependencies": {
+    "@types/estree": "^0.0.51",
+    "@types/estree-jsx": "^0.0.1",
+    "@typescript-eslint/parser": "^5.14.0",
+    "c8": "^7.11.0",
+    "chai": "^4.3.6",
+    "eslint": "^7.29.0",
+    "eslint-config-eslint": "^7.0.0",
+    "eslint-plugin-jsdoc": "^35.4.0",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-release": "^3.2.0",
+    "esquery": "^1.4.0",
+    "json-diff": "^0.7.3",
+    "mocha": "^9.2.1",
+    "opener": "^1.5.2",
+    "rollup": "^2.70.0",
+    "rollup-plugin-dts": "^4.2.3",
+    "tsd": "^0.19.1",
+    "typescript": "^4.6.2"
+  },
+  "scripts": {
+    "build": "npm run build:cjs && npm run build:types",
+    "build:cjs": "rollup -c",
+    "build:debug": "npm run build:cjs -- -m && npm run build:types",
+    "build:keys": "node tools/build-keys-from-ts",
+    "build:types": "tsc",
+    "lint": "eslint .",
+    "prepare": "npm run build",
+    "release:generate:latest": "eslint-generate-release",
+    "release:generate:alpha": "eslint-generate-prerelease alpha",
+    "release:generate:beta": "eslint-generate-prerelease beta",
+    "release:generate:rc": "eslint-generate-prerelease rc",
+    "release:publish": "eslint-publish-release",
+    "test": "mocha tests/lib/**/*.cjs && c8 mocha tests/lib/**/*.js && npm run test:types",
+    "test:open-coverage": "c8 report --reporter lcov && opener coverage/lcov-report/index.html",
+    "test:types": "tsd"
+  },
+  "repository": "eslint/eslint-visitor-keys",
+  "funding": "https://opencollective.com/eslint",
+  "keywords": [],
+  "author": "Toru Nagashima (https://github.com/mysticatea)",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/eslint/eslint-visitor-keys/issues"
+  },
+  "homepage": "https://github.com/eslint/eslint-visitor-keys#readme"
+}

node_modules/@eslint-community/eslint-utils/package.json

@@ -0,0 +1,73 @@
+{
+    "name": "@eslint-community/eslint-utils",
+    "version": "4.4.0",
+    "description": "Utilities for ESLint plugins.",
+    "keywords": [
+        "eslint"
+    ],
+    "homepage": "https://github.com/eslint-community/eslint-utils#readme",
+    "bugs": {
+        "url": "https://github.com/eslint-community/eslint-utils/issues"
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/eslint-community/eslint-utils"
+    },
+    "license": "MIT",
+    "author": "Toru Nagashima",
+    "sideEffects": false,
+    "exports": {
+        ".": {
+            "import": "./index.mjs",
+            "require": "./index.js"
+        },
+        "./package.json": "./package.json"
+    },
+    "main": "index",
+    "module": "index.mjs",
+    "files": [
+        "index.*"
+    ],
+    "scripts": {
+        "prebuild": "npm run -s clean",
+        "build": "rollup -c",
+        "clean": "rimraf .nyc_output coverage index.*",
+        "coverage": "opener ./coverage/lcov-report/index.html",
+        "docs:build": "vitepress build docs",
+        "docs:watch": "vitepress dev docs",
+        "format": "npm run -s format:prettier -- --write",
+        "format:prettier": "prettier .",
+        "format:check": "npm run -s format:prettier -- --check",
+        "lint": "eslint .",
+        "test": "c8 mocha --reporter dot \"test/*.mjs\"",
+        "preversion": "npm test && npm run -s build",
+        "postversion": "git push && git push --tags",
+        "prewatch": "npm run -s clean",
+        "watch": "warun \"{src,test}/**/*.mjs\" -- npm run -s test:mocha"
+    },
+    "dependencies": {
+        "eslint-visitor-keys": "^3.3.0"
+    },
+    "devDependencies": {
+        "@eslint-community/eslint-plugin-mysticatea": "^15.2.0",
+        "c8": "^7.12.0",
+        "dot-prop": "^6.0.1",
+        "eslint": "^8.28.0",
+        "mocha": "^9.2.2",
+        "npm-run-all": "^4.1.5",
+        "opener": "^1.5.2",
+        "prettier": "2.8.4",
+        "rimraf": "^3.0.2",
+        "rollup": "^2.79.1",
+        "rollup-plugin-sourcemaps": "^0.6.3",
+        "semver": "^7.3.8",
+        "vitepress": "^1.0.0-alpha.40",
+        "warun": "^1.0.0"
+    },
+    "peerDependencies": {
+        "eslint": "^6.0.0 || ^7.0.0 || >=8.0.0"
+    },
+    "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+    }
+}

node_modules/@eslint-community/regexpp/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Toru Nagashima
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/@eslint-community/regexpp/README.md

@@ -0,0 +1,177 @@
+# @eslint-community/regexpp
+
+[![npm version](https://img.shields.io/npm/v/@eslint-community/regexpp.svg)](https://www.npmjs.com/package/@eslint-community/regexpp)
+[![Downloads/month](https://img.shields.io/npm/dm/@eslint-community/regexpp.svg)](http://www.npmtrends.com/@eslint-community/regexpp)
+[![Build Status](https://github.com/eslint-community/regexpp/workflows/CI/badge.svg)](https://github.com/eslint-community/regexpp/actions)
+[![codecov](https://codecov.io/gh/eslint-community/regexpp/branch/main/graph/badge.svg)](https://codecov.io/gh/eslint-community/regexpp)
+
+A regular expression parser for ECMAScript.
+
+## 💿 Installation
+
+```bash
+$ npm install @eslint-community/regexpp
+```
+
+- require Node@^12.0.0 || ^14.0.0 || >=16.0.0.
+
+## 📖 Usage
+
+```ts
+import {
+    AST,
+    RegExpParser,
+    RegExpValidator,
+    RegExpVisitor,
+    parseRegExpLiteral,
+    validateRegExpLiteral,
+    visitRegExpAST
+} from "@eslint-community/regexpp"
+```
+
+### parseRegExpLiteral(source, options?)
+
+Parse a given regular expression literal then make AST object.
+
+This is equivalent to `new RegExpParser(options).parseLiteral(source)`.
+
+- **Parameters:**
+    - `source` (`string | RegExp`) The source code to parse.
+    - `options?` ([`RegExpParser.Options`]) The options to parse.
+- **Return:**
+    - The AST of the regular expression.
+
+### validateRegExpLiteral(source, options?)
+
+Validate a given regular expression literal.
+
+This is equivalent to `new RegExpValidator(options).validateLiteral(source)`.
+
+- **Parameters:**
+    - `source` (`string`) The source code to validate.
+    - `options?` ([`RegExpValidator.Options`]) The options to validate.
+
+### visitRegExpAST(ast, handlers)
+
+Visit each node of a given AST.
+
+This is equivalent to `new RegExpVisitor(handlers).visit(ast)`.
+
+- **Parameters:**
+    - `ast` ([`AST.Node`]) The AST to visit.
+    - `handlers` ([`RegExpVisitor.Handlers`]) The callbacks.
+
+### RegExpParser
+
+#### new RegExpParser(options?)
+
+- **Parameters:**
+    - `options?` ([`RegExpParser.Options`]) The options to parse.
+
+#### parser.parseLiteral(source, start?, end?)
+
+Parse a regular expression literal.
+
+- **Parameters:**
+    - `source` (`string`) The source code to parse. E.g. `"/abc/g"`.
+    - `start?` (`number`) The start index in the source code. Default is `0`.
+    - `end?` (`number`) The end index in the source code. Default is `source.length`.
+- **Return:**
+    - The AST of the regular expression.
+
+#### parser.parsePattern(source, start?, end?, flags?)
+
+Parse a regular expression pattern.
+
+- **Parameters:**
+    - `source` (`string`) The source code to parse. E.g. `"abc"`.
+    - `start?` (`number`) The start index in the source code. Default is `0`.
+    - `end?` (`number`) The end index in the source code. Default is `source.length`.
+    - `flags?` (`{ unicode?: boolean, unicodeSets?: boolean }`) The flags to enable Unicode mode, and Unicode Set mode.
+- **Return:**
+    - The AST of the regular expression pattern.
+
+#### parser.parseFlags(source, start?, end?)
+
+Parse a regular expression flags.
+
+- **Parameters:**
+    - `source` (`string`) The source code to parse. E.g. `"gim"`.
+    - `start?` (`number`) The start index in the source code. Default is `0`.
+    - `end?` (`number`) The end index in the source code. Default is `source.length`.
+- **Return:**
+    - The AST of the regular expression flags.
+
+### RegExpValidator
+
+#### new RegExpValidator(options)
+
+- **Parameters:**
+    - `options` ([`RegExpValidator.Options`]) The options to validate.
+
+#### validator.validateLiteral(source, start, end)
+
+Validate a regular expression literal.
+
+- **Parameters:**
+    - `source` (`string`) The source code to validate.
+    - `start?` (`number`) The start index in the source code. Default is `0`.
+    - `end?` (`number`) The end index in the source code. Default is `source.length`.
+
+#### validator.validatePattern(source, start, end, flags)
+
+Validate a regular expression pattern.
+
+- **Parameters:**
+    - `source` (`string`) The source code to validate.
+    - `start?` (`number`) The start index in the source code. Default is `0`.
+    - `end?` (`number`) The end index in the source code. Default is `source.length`.
+    - `flags?` (`{ unicode?: boolean, unicodeSets?: boolean }`) The flags to enable Unicode mode, and Unicode Set mode.
+
+#### validator.validateFlags(source, start, end)
+
+Validate a regular expression flags.
+
+- **Parameters:**
+    - `source` (`string`) The source code to validate.
+    - `start?` (`number`) The start index in the source code. Default is `0`.
+    - `end?` (`number`) The end index in the source code. Default is `source.length`.
+
+### RegExpVisitor
+
+#### new RegExpVisitor(handlers)
+
+- **Parameters:**
+    - `handlers` ([`RegExpVisitor.Handlers`]) The callbacks.
+
+#### visitor.visit(ast)
+
+Validate a regular expression literal.
+
+- **Parameters:**
+    - `ast` ([`AST.Node`]) The AST to visit.
+
+## 📰 Changelog
+
+- [GitHub Releases](https://github.com/eslint-community/regexpp/releases)
+
+## 🍻 Contributing
+
+Welcome contributing!
+
+Please use GitHub's Issues/PRs.
+
+### Development Tools
+
+- `npm test` runs tests and measures coverage.
+- `npm run build` compiles TypeScript source code to `index.js`, `index.js.map`, and `index.d.ts`.
+- `npm run clean` removes the temporary files which are created by `npm test` and `npm run build`.
+- `npm run lint` runs ESLint.
+- `npm run update:test` updates test fixtures.
+- `npm run update:ids` updates `src/unicode/ids.ts`.
+- `npm run watch` runs tests with `--watch` option.
+
+[`AST.Node`]: src/ast.ts#L4
+[`RegExpParser.Options`]: src/parser.ts#L743
+[`RegExpValidator.Options`]: src/validator.ts#L220
+[`RegExpVisitor.Handlers`]: src/visitor.ts#L291

node_modules/@eslint-community/regexpp/package.json

@@ -0,0 +1,93 @@
+{
+  "name": "@eslint-community/regexpp",
+  "version": "4.10.0",
+  "description": "Regular expression parser for ECMAScript.",
+  "keywords": [
+    "regexp",
+    "regular",
+    "expression",
+    "parser",
+    "validator",
+    "ast",
+    "abstract",
+    "syntax",
+    "tree",
+    "ecmascript",
+    "es2015",
+    "es2016",
+    "es2017",
+    "es2018",
+    "es2019",
+    "es2020",
+    "es2021",
+    "annexB"
+  ],
+  "homepage": "https://github.com/eslint-community/regexpp#readme",
+  "bugs": {
+    "url": "https://github.com/eslint-community/regexpp/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/eslint-community/regexpp"
+  },
+  "license": "MIT",
+  "author": "Toru Nagashima",
+  "exports": {
+    ".": {
+      "types": "./index.d.ts",
+      "import": "./index.mjs",
+      "default": "./index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "main": "index",
+  "files": [
+    "index.*"
+  ],
+  "scripts": {
+    "prebuild": "npm run -s clean",
+    "build": "run-s build:*",
+    "build:tsc": "tsc --module es2015",
+    "build:rollup": "rollup -c",
+    "build:dts": "npm run -s build:tsc -- --removeComments false && dts-bundle --name @eslint-community/regexpp --main .temp/index.d.ts --out ../index.d.ts && prettier --write index.d.ts",
+    "clean": "rimraf .temp index.*",
+    "lint": "eslint . --ext .ts",
+    "test": "nyc _mocha \"test/*.ts\" --reporter dot --timeout 10000",
+    "debug": "mocha --require ts-node/register/transpile-only \"test/*.ts\" --reporter dot --timeout 10000",
+    "update:test": "ts-node scripts/update-fixtures.ts",
+    "update:unicode": "run-s update:unicode:*",
+    "update:unicode:ids": "ts-node scripts/update-unicode-ids.ts",
+    "update:unicode:props": "ts-node scripts/update-unicode-properties.ts",
+    "update:test262:extract": "ts-node -T scripts/extract-test262.ts",
+    "preversion": "npm test && npm run -s build",
+    "postversion": "git push && git push --tags",
+    "prewatch": "npm run -s clean",
+    "watch": "_mocha \"test/*.ts\" --require ts-node/register --reporter dot --timeout 10000 --watch-extensions ts --watch --growl"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "@eslint-community/eslint-plugin-mysticatea": "^15.5.1",
+    "@rollup/plugin-node-resolve": "^14.1.0",
+    "@types/eslint": "^8.44.3",
+    "@types/jsdom": "^16.2.15",
+    "@types/mocha": "^9.1.1",
+    "@types/node": "^12.20.55",
+    "dts-bundle": "^0.7.3",
+    "eslint": "^8.50.0",
+    "js-tokens": "^8.0.2",
+    "jsdom": "^19.0.0",
+    "mocha": "^9.2.2",
+    "npm-run-all": "^4.1.5",
+    "nyc": "^14.1.1",
+    "rimraf": "^3.0.2",
+    "rollup": "^2.79.1",
+    "rollup-plugin-sourcemaps": "^0.6.3",
+    "test262": "git+https://github.com/tc39/test262.git",
+    "test262-stream": "^1.4.0",
+    "ts-node": "^10.9.1",
+    "typescript": "~5.0.2"
+  },
+  "engines": {
+    "node": "^12.0.0 || ^14.0.0 || >=16.0.0"
+  }
+}

node_modules/@eslint/eslintrc/LICENSE

@@ -0,0 +1,19 @@
+Copyright OpenJS Foundation and other contributors, <www.openjsf.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

node_modules/@eslint/eslintrc/README.md

@@ -0,0 +1,126 @@
+# ESLintRC Library
+
+This repository contains the legacy ESLintRC configuration file format for ESLint. This package is not intended for use outside of the ESLint ecosystem. It is ESLint-specific and not intended for use in other programs.
+
+**Note:** This package is frozen except for critical bug fixes as ESLint moves to a new config system.
+
+## Installation
+
+You can install the package as follows:
+
+```
+npm install @eslint/eslintrc --save-dev
+
+# or
+
+yarn add @eslint/eslintrc -D
+```
+
+## Usage (ESM)
+
+The primary class in this package is `FlatCompat`, which is a utility to translate ESLintRC-style configs into flat configs. Here's how you use it inside of your `eslint.config.js` file:
+
+```js
+import { FlatCompat } from "@eslint/eslintrc";
+import js from "@eslint/js";
+import path from "path";
+import { fileURLToPath } from "url";
+
+// mimic CommonJS variables -- not needed if using CommonJS
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const compat = new FlatCompat({
+    baseDirectory: __dirname,                  // optional; default: process.cwd()
+    resolvePluginsRelativeTo: __dirname,       // optional
+    recommendedConfig: js.configs.recommended, // optional unless you're using "eslint:recommended"
+    allConfig: js.configs.all,                 // optional unless you're using "eslint:all"
+});
+
+export default [
+
+    // mimic ESLintRC-style extends
+    ...compat.extends("standard", "example"),
+
+    // mimic environments
+    ...compat.env({
+        es2020: true,
+        node: true
+    }),
+
+    // mimic plugins
+    ...compat.plugins("airbnb", "react"),
+
+    // translate an entire config
+    ...compat.config({
+        plugins: ["airbnb", "react"],
+        extends: "standard",
+        env: {
+            es2020: true,
+            node: true
+        },
+        rules: {
+            semi: "error"
+        }
+    })
+];
+```
+
+## Usage (CommonJS)
+
+Using `FlatCompat` in CommonJS files is similar to ESM, but you'll use `require()` and `module.exports` instead of `import` and `export`. Here's how you use it inside of your `eslint.config.js` CommonJS file:
+
+```js
+const { FlatCompat } = require("@eslint/eslintrc");
+const js = require("@eslint/js");
+
+const compat = new FlatCompat({
+    baseDirectory: __dirname,                  // optional; default: process.cwd()
+    resolvePluginsRelativeTo: __dirname,       // optional
+    recommendedConfig: js.configs.recommended, // optional unless using "eslint:recommended"
+    allConfig: js.configs.all,                 // optional unless using "eslint:all"
+});
+
+module.exports = [
+
+    // mimic ESLintRC-style extends
+    ...compat.extends("standard", "example"),
+
+    // mimic environments
+    ...compat.env({
+        es2020: true,
+        node: true
+    }),
+
+    // mimic plugins
+    ...compat.plugins("airbnb", "react"),
+
+    // translate an entire config
+    ...compat.config({
+        plugins: ["airbnb", "react"],
+        extends: "standard",
+        env: {
+            es2020: true,
+            node: true
+        },
+        rules: {
+            semi: "error"
+        }
+    })
+];
+```
+
+## Troubleshooting
+
+**TypeError: Missing parameter 'recommendedConfig' in FlatCompat constructor**
+
+The `recommendedConfig` option is required when any config uses `eslint:recommended`, including any config in an `extends` clause. To fix this, follow the example above using `@eslint/js` to provide the `eslint:recommended` config.
+
+**TypeError: Missing parameter 'allConfig' in FlatCompat constructor**
+
+The `allConfig` option is required when any config uses `eslint:all`, including any config in an `extends` clause. To fix this, follow the example above using `@eslint/js` to provide the `eslint:all` config.
+
+
+## License
+
+MIT License

node_modules/@eslint/eslintrc/conf/config-schema.js

@@ -0,0 +1,79 @@
+/**
+ * @fileoverview Defines a schema for configs.
+ * @author Sylvan Mably
+ */
+
+const baseConfigProperties = {
+    $schema: { type: "string" },
+    env: { type: "object" },
+    extends: { $ref: "#/definitions/stringOrStrings" },
+    globals: { type: "object" },
+    overrides: {
+        type: "array",
+        items: { $ref: "#/definitions/overrideConfig" },
+        additionalItems: false
+    },
+    parser: { type: ["string", "null"] },
+    parserOptions: { type: "object" },
+    plugins: { type: "array" },
+    processor: { type: "string" },
+    rules: { type: "object" },
+    settings: { type: "object" },
+    noInlineConfig: { type: "boolean" },
+    reportUnusedDisableDirectives: { type: "boolean" },
+
+    ecmaFeatures: { type: "object" } // deprecated; logs a warning when used
+};
+
+const configSchema = {
+    definitions: {
+        stringOrStrings: {
+            oneOf: [
+                { type: "string" },
+                {
+                    type: "array",
+                    items: { type: "string" },
+                    additionalItems: false
+                }
+            ]
+        },
+        stringOrStringsRequired: {
+            oneOf: [
+                { type: "string" },
+                {
+                    type: "array",
+                    items: { type: "string" },
+                    additionalItems: false,
+                    minItems: 1
+                }
+            ]
+        },
+
+        // Config at top-level.
+        objectConfig: {
+            type: "object",
+            properties: {
+                root: { type: "boolean" },
+                ignorePatterns: { $ref: "#/definitions/stringOrStrings" },
+                ...baseConfigProperties
+            },
+            additionalProperties: false
+        },
+
+        // Config in `overrides`.
+        overrideConfig: {
+            type: "object",
+            properties: {
+                excludedFiles: { $ref: "#/definitions/stringOrStrings" },
+                files: { $ref: "#/definitions/stringOrStringsRequired" },
+                ...baseConfigProperties
+            },
+            required: ["files"],
+            additionalProperties: false
+        }
+    },
+
+    $ref: "#/definitions/objectConfig"
+};
+
+export default configSchema;

node_modules/@eslint/eslintrc/conf/environments.js

@@ -0,0 +1,215 @@
+/**
+ * @fileoverview Defines environment settings and globals.
+ * @author Elan Shanker
+ */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import globals from "globals";
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Get the object that has difference.
+ * @param {Record<string,boolean>} current The newer object.
+ * @param {Record<string,boolean>} prev The older object.
+ * @returns {Record<string,boolean>} The difference object.
+ */
+function getDiff(current, prev) {
+    const retv = {};
+
+    for (const [key, value] of Object.entries(current)) {
+        if (!Object.hasOwnProperty.call(prev, key)) {
+            retv[key] = value;
+        }
+    }
+
+    return retv;
+}
+
+const newGlobals2015 = getDiff(globals.es2015, globals.es5); // 19 variables such as Promise, Map, ...
+const newGlobals2017 = {
+    Atomics: false,
+    SharedArrayBuffer: false
+};
+const newGlobals2020 = {
+    BigInt: false,
+    BigInt64Array: false,
+    BigUint64Array: false,
+    globalThis: false
+};
+
+const newGlobals2021 = {
+    AggregateError: false,
+    FinalizationRegistry: false,
+    WeakRef: false
+};
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/** @type {Map<string, import("../lib/shared/types").Environment>} */
+export default new Map(Object.entries({
+
+    // Language
+    builtin: {
+        globals: globals.es5
+    },
+    es6: {
+        globals: newGlobals2015,
+        parserOptions: {
+            ecmaVersion: 6
+        }
+    },
+    es2015: {
+        globals: newGlobals2015,
+        parserOptions: {
+            ecmaVersion: 6
+        }
+    },
+    es2016: {
+        globals: newGlobals2015,
+        parserOptions: {
+            ecmaVersion: 7
+        }
+    },
+    es2017: {
+        globals: { ...newGlobals2015, ...newGlobals2017 },
+        parserOptions: {
+            ecmaVersion: 8
+        }
+    },
+    es2018: {
+        globals: { ...newGlobals2015, ...newGlobals2017 },
+        parserOptions: {
+            ecmaVersion: 9
+        }
+    },
+    es2019: {
+        globals: { ...newGlobals2015, ...newGlobals2017 },
+        parserOptions: {
+            ecmaVersion: 10
+        }
+    },
+    es2020: {
+        globals: { ...newGlobals2015, ...newGlobals2017, ...newGlobals2020 },
+        parserOptions: {
+            ecmaVersion: 11
+        }
+    },
+    es2021: {
+        globals: { ...newGlobals2015, ...newGlobals2017, ...newGlobals2020, ...newGlobals2021 },
+        parserOptions: {
+            ecmaVersion: 12
+        }
+    },
+    es2022: {
+        globals: { ...newGlobals2015, ...newGlobals2017, ...newGlobals2020, ...newGlobals2021 },
+        parserOptions: {
+            ecmaVersion: 13
+        }
+    },
+    es2023: {
+        globals: { ...newGlobals2015, ...newGlobals2017, ...newGlobals2020, ...newGlobals2021 },
+        parserOptions: {
+            ecmaVersion: 14
+        }
+    },
+    es2024: {
+        globals: { ...newGlobals2015, ...newGlobals2017, ...newGlobals2020, ...newGlobals2021 },
+        parserOptions: {
+            ecmaVersion: 15
+        }
+    },
+
+    // Platforms
+    browser: {
+        globals: globals.browser
+    },
+    node: {
+        globals: globals.node,
+        parserOptions: {
+            ecmaFeatures: {
+                globalReturn: true
+            }
+        }
+    },
+    "shared-node-browser": {
+        globals: globals["shared-node-browser"]
+    },
+    worker: {
+        globals: globals.worker
+    },
+    serviceworker: {
+        globals: globals.serviceworker
+    },
+
+    // Frameworks
+    commonjs: {
+        globals: globals.commonjs,
+        parserOptions: {
+            ecmaFeatures: {
+                globalReturn: true
+            }
+        }
+    },
+    amd: {
+        globals: globals.amd
+    },
+    mocha: {
+        globals: globals.mocha
+    },
+    jasmine: {
+        globals: globals.jasmine
+    },
+    jest: {
+        globals: globals.jest
+    },
+    phantomjs: {
+        globals: globals.phantomjs
+    },
+    jquery: {
+        globals: globals.jquery
+    },
+    qunit: {
+        globals: globals.qunit
+    },
+    prototypejs: {
+        globals: globals.prototypejs
+    },
+    shelljs: {
+        globals: globals.shelljs
+    },
+    meteor: {
+        globals: globals.meteor
+    },
+    mongo: {
+        globals: globals.mongo
+    },
+    protractor: {
+        globals: globals.protractor
+    },
+    applescript: {
+        globals: globals.applescript
+    },
+    nashorn: {
+        globals: globals.nashorn
+    },
+    atomtest: {
+        globals: globals.atomtest
+    },
+    embertest: {
+        globals: globals.embertest
+    },
+    webextensions: {
+        globals: globals.webextensions
+    },
+    greasemonkey: {
+        globals: globals.greasemonkey
+    }
+}));

node_modules/@eslint/eslintrc/lib/cascading-config-array-factory.js

@@ -0,0 +1,532 @@
+/**
+ * @fileoverview `CascadingConfigArrayFactory` class.
+ *
+ * `CascadingConfigArrayFactory` class has a responsibility:
+ *
+ * 1. Handles cascading of config files.
+ *
+ * It provides two methods:
+ *
+ * - `getConfigArrayForFile(filePath)`
+ *     Get the corresponded configuration of a given file. This method doesn't
+ *     throw even if the given file didn't exist.
+ * - `clearCache()`
+ *     Clear the internal cache. You have to call this method when
+ *     `additionalPluginPool` was updated if `baseConfig` or `cliConfig` depends
+ *     on the additional plugins. (`CLIEngine#addPlugin()` method calls this.)
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import debugOrig from "debug";
+import os from "os";
+import path from "path";
+
+import { ConfigArrayFactory } from "./config-array-factory.js";
+import {
+    ConfigArray,
+    ConfigDependency,
+    IgnorePattern
+} from "./config-array/index.js";
+import ConfigValidator from "./shared/config-validator.js";
+import { emitDeprecationWarning } from "./shared/deprecation-warnings.js";
+
+const debug = debugOrig("eslintrc:cascading-config-array-factory");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+// Define types for VSCode IntelliSense.
+/** @typedef {import("./shared/types").ConfigData} ConfigData */
+/** @typedef {import("./shared/types").Parser} Parser */
+/** @typedef {import("./shared/types").Plugin} Plugin */
+/** @typedef {import("./shared/types").Rule} Rule */
+/** @typedef {ReturnType<ConfigArrayFactory["create"]>} ConfigArray */
+
+/**
+ * @typedef {Object} CascadingConfigArrayFactoryOptions
+ * @property {Map<string,Plugin>} [additionalPluginPool] The map for additional plugins.
+ * @property {ConfigData} [baseConfig] The config by `baseConfig` option.
+ * @property {ConfigData} [cliConfig] The config by CLI options (`--env`, `--global`, `--ignore-pattern`, `--parser`, `--parser-options`, `--plugin`, and `--rule`). CLI options overwrite the setting in config files.
+ * @property {string} [cwd] The base directory to start lookup.
+ * @property {string} [ignorePath] The path to the alternative file of `.eslintignore`.
+ * @property {string[]} [rulePaths] The value of `--rulesdir` option.
+ * @property {string} [specificConfigPath] The value of `--config` option.
+ * @property {boolean} [useEslintrc] if `false` then it doesn't load config files.
+ * @property {Function} loadRules The function to use to load rules.
+ * @property {Map<string,Rule>} builtInRules The rules that are built in to ESLint.
+ * @property {Object} [resolver=ModuleResolver] The module resolver object.
+ * @property {string} eslintAllPath The path to the definitions for eslint:all.
+ * @property {Function} getEslintAllConfig Returns the config data for eslint:all.
+ * @property {string} eslintRecommendedPath The path to the definitions for eslint:recommended.
+ * @property {Function} getEslintRecommendedConfig Returns the config data for eslint:recommended.
+ */
+
+/**
+ * @typedef {Object} CascadingConfigArrayFactoryInternalSlots
+ * @property {ConfigArray} baseConfigArray The config array of `baseConfig` option.
+ * @property {ConfigData} baseConfigData The config data of `baseConfig` option. This is used to reset `baseConfigArray`.
+ * @property {ConfigArray} cliConfigArray The config array of CLI options.
+ * @property {ConfigData} cliConfigData The config data of CLI options. This is used to reset `cliConfigArray`.
+ * @property {ConfigArrayFactory} configArrayFactory The factory for config arrays.
+ * @property {Map<string, ConfigArray>} configCache The cache from directory paths to config arrays.
+ * @property {string} cwd The base directory to start lookup.
+ * @property {WeakMap<ConfigArray, ConfigArray>} finalizeCache The cache from config arrays to finalized config arrays.
+ * @property {string} [ignorePath] The path to the alternative file of `.eslintignore`.
+ * @property {string[]|null} rulePaths The value of `--rulesdir` option. This is used to reset `baseConfigArray`.
+ * @property {string|null} specificConfigPath The value of `--config` option. This is used to reset `cliConfigArray`.
+ * @property {boolean} useEslintrc if `false` then it doesn't load config files.
+ * @property {Function} loadRules The function to use to load rules.
+ * @property {Map<string,Rule>} builtInRules The rules that are built in to ESLint.
+ * @property {Object} [resolver=ModuleResolver] The module resolver object.
+ * @property {string} eslintAllPath The path to the definitions for eslint:all.
+ * @property {Function} getEslintAllConfig Returns the config data for eslint:all.
+ * @property {string} eslintRecommendedPath The path to the definitions for eslint:recommended.
+ * @property {Function} getEslintRecommendedConfig Returns the config data for eslint:recommended.
+ */
+
+/** @type {WeakMap<CascadingConfigArrayFactory, CascadingConfigArrayFactoryInternalSlots>} */
+const internalSlotsMap = new WeakMap();
+
+/**
+ * Create the config array from `baseConfig` and `rulePaths`.
+ * @param {CascadingConfigArrayFactoryInternalSlots} slots The slots.
+ * @returns {ConfigArray} The config array of the base configs.
+ */
+function createBaseConfigArray({
+    configArrayFactory,
+    baseConfigData,
+    rulePaths,
+    cwd,
+    loadRules
+}) {
+    const baseConfigArray = configArrayFactory.create(
+        baseConfigData,
+        { name: "BaseConfig" }
+    );
+
+    /*
+     * Create the config array element for the default ignore patterns.
+     * This element has `ignorePattern` property that ignores the default
+     * patterns in the current working directory.
+     */
+    baseConfigArray.unshift(configArrayFactory.create(
+        { ignorePatterns: IgnorePattern.DefaultPatterns },
+        { name: "DefaultIgnorePattern" }
+    )[0]);
+
+    /*
+     * Load rules `--rulesdir` option as a pseudo plugin.
+     * Use a pseudo plugin to define rules of `--rulesdir`, so we can validate
+     * the rule's options with only information in the config array.
+     */
+    if (rulePaths && rulePaths.length > 0) {
+        baseConfigArray.push({
+            type: "config",
+            name: "--rulesdir",
+            filePath: "",
+            plugins: {
+                "": new ConfigDependency({
+                    definition: {
+                        rules: rulePaths.reduce(
+                            (map, rulesPath) => Object.assign(
+                                map,
+                                loadRules(rulesPath, cwd)
+                            ),
+                            {}
+                        )
+                    },
+                    filePath: "",
+                    id: "",
+                    importerName: "--rulesdir",
+                    importerPath: ""
+                })
+            }
+        });
+    }
+
+    return baseConfigArray;
+}
+
+/**
+ * Create the config array from CLI options.
+ * @param {CascadingConfigArrayFactoryInternalSlots} slots The slots.
+ * @returns {ConfigArray} The config array of the base configs.
+ */
+function createCLIConfigArray({
+    cliConfigData,
+    configArrayFactory,
+    cwd,
+    ignorePath,
+    specificConfigPath
+}) {
+    const cliConfigArray = configArrayFactory.create(
+        cliConfigData,
+        { name: "CLIOptions" }
+    );
+
+    cliConfigArray.unshift(
+        ...(ignorePath
+            ? configArrayFactory.loadESLintIgnore(ignorePath)
+            : configArrayFactory.loadDefaultESLintIgnore())
+    );
+
+    if (specificConfigPath) {
+        cliConfigArray.unshift(
+            ...configArrayFactory.loadFile(
+                specificConfigPath,
+                { name: "--config", basePath: cwd }
+            )
+        );
+    }
+
+    return cliConfigArray;
+}
+
+/**
+ * The error type when there are files matched by a glob, but all of them have been ignored.
+ */
+class ConfigurationNotFoundError extends Error {
+
+    // eslint-disable-next-line jsdoc/require-description
+    /**
+     * @param {string} directoryPath The directory path.
+     */
+    constructor(directoryPath) {
+        super(`No ESLint configuration found in ${directoryPath}.`);
+        this.messageTemplate = "no-config-found";
+        this.messageData = { directoryPath };
+    }
+}
+
+/**
+ * This class provides the functionality that enumerates every file which is
+ * matched by given glob patterns and that configuration.
+ */
+class CascadingConfigArrayFactory {
+
+    /**
+     * Initialize this enumerator.
+     * @param {CascadingConfigArrayFactoryOptions} options The options.
+     */
+    constructor({
+        additionalPluginPool = new Map(),
+        baseConfig: baseConfigData = null,
+        cliConfig: cliConfigData = null,
+        cwd = process.cwd(),
+        ignorePath,
+        resolvePluginsRelativeTo,
+        rulePaths = [],
+        specificConfigPath = null,
+        useEslintrc = true,
+        builtInRules = new Map(),
+        loadRules,
+        resolver,
+        eslintRecommendedPath,
+        getEslintRecommendedConfig,
+        eslintAllPath,
+        getEslintAllConfig
+    } = {}) {
+        const configArrayFactory = new ConfigArrayFactory({
+            additionalPluginPool,
+            cwd,
+            resolvePluginsRelativeTo,
+            builtInRules,
+            resolver,
+            eslintRecommendedPath,
+            getEslintRecommendedConfig,
+            eslintAllPath,
+            getEslintAllConfig
+        });
+
+        internalSlotsMap.set(this, {
+            baseConfigArray: createBaseConfigArray({
+                baseConfigData,
+                configArrayFactory,
+                cwd,
+                rulePaths,
+                loadRules
+            }),
+            baseConfigData,
+            cliConfigArray: createCLIConfigArray({
+                cliConfigData,
+                configArrayFactory,
+                cwd,
+                ignorePath,
+                specificConfigPath
+            }),
+            cliConfigData,
+            configArrayFactory,
+            configCache: new Map(),
+            cwd,
+            finalizeCache: new WeakMap(),
+            ignorePath,
+            rulePaths,
+            specificConfigPath,
+            useEslintrc,
+            builtInRules,
+            loadRules
+        });
+    }
+
+    /**
+     * The path to the current working directory.
+     * This is used by tests.
+     * @type {string}
+     */
+    get cwd() {
+        const { cwd } = internalSlotsMap.get(this);
+
+        return cwd;
+    }
+
+    /**
+     * Get the config array of a given file.
+     * If `filePath` was not given, it returns the config which contains only
+     * `baseConfigData` and `cliConfigData`.
+     * @param {string} [filePath] The file path to a file.
+     * @param {Object} [options] The options.
+     * @param {boolean} [options.ignoreNotFoundError] If `true` then it doesn't throw `ConfigurationNotFoundError`.
+     * @returns {ConfigArray} The config array of the file.
+     */
+    getConfigArrayForFile(filePath, { ignoreNotFoundError = false } = {}) {
+        const {
+            baseConfigArray,
+            cliConfigArray,
+            cwd
+        } = internalSlotsMap.get(this);
+
+        if (!filePath) {
+            return new ConfigArray(...baseConfigArray, ...cliConfigArray);
+        }
+
+        const directoryPath = path.dirname(path.resolve(cwd, filePath));
+
+        debug(`Load config files for ${directoryPath}.`);
+
+        return this._finalizeConfigArray(
+            this._loadConfigInAncestors(directoryPath),
+            directoryPath,
+            ignoreNotFoundError
+        );
+    }
+
+    /**
+     * Set the config data to override all configs.
+     * Require to call `clearCache()` method after this method is called.
+     * @param {ConfigData} configData The config data to override all configs.
+     * @returns {void}
+     */
+    setOverrideConfig(configData) {
+        const slots = internalSlotsMap.get(this);
+
+        slots.cliConfigData = configData;
+    }
+
+    /**
+     * Clear config cache.
+     * @returns {void}
+     */
+    clearCache() {
+        const slots = internalSlotsMap.get(this);
+
+        slots.baseConfigArray = createBaseConfigArray(slots);
+        slots.cliConfigArray = createCLIConfigArray(slots);
+        slots.configCache.clear();
+    }
+
+    /**
+     * Load and normalize config files from the ancestor directories.
+     * @param {string} directoryPath The path to a leaf directory.
+     * @param {boolean} configsExistInSubdirs `true` if configurations exist in subdirectories.
+     * @returns {ConfigArray} The loaded config.
+     * @private
+     */
+    _loadConfigInAncestors(directoryPath, configsExistInSubdirs = false) {
+        const {
+            baseConfigArray,
+            configArrayFactory,
+            configCache,
+            cwd,
+            useEslintrc
+        } = internalSlotsMap.get(this);
+
+        if (!useEslintrc) {
+            return baseConfigArray;
+        }
+
+        let configArray = configCache.get(directoryPath);
+
+        // Hit cache.
+        if (configArray) {
+            debug(`Cache hit: ${directoryPath}.`);
+            return configArray;
+        }
+        debug(`No cache found: ${directoryPath}.`);
+
+        const homePath = os.homedir();
+
+        // Consider this is root.
+        if (directoryPath === homePath && cwd !== homePath) {
+            debug("Stop traversing because of considered root.");
+            if (configsExistInSubdirs) {
+                const filePath = ConfigArrayFactory.getPathToConfigFileInDirectory(directoryPath);
+
+                if (filePath) {
+                    emitDeprecationWarning(
+                        filePath,
+                        "ESLINT_PERSONAL_CONFIG_SUPPRESS"
+                    );
+                }
+            }
+            return this._cacheConfig(directoryPath, baseConfigArray);
+        }
+
+        // Load the config on this directory.
+        try {
+            configArray = configArrayFactory.loadInDirectory(directoryPath);
+        } catch (error) {
+            /* istanbul ignore next */
+            if (error.code === "EACCES") {
+                debug("Stop traversing because of 'EACCES' error.");
+                return this._cacheConfig(directoryPath, baseConfigArray);
+            }
+            throw error;
+        }
+
+        if (configArray.length > 0 && configArray.isRoot()) {
+            debug("Stop traversing because of 'root:true'.");
+            configArray.unshift(...baseConfigArray);
+            return this._cacheConfig(directoryPath, configArray);
+        }
+
+        // Load from the ancestors and merge it.
+        const parentPath = path.dirname(directoryPath);
+        const parentConfigArray = parentPath && parentPath !== directoryPath
+            ? this._loadConfigInAncestors(
+                parentPath,
+                configsExistInSubdirs || configArray.length > 0
+            )
+            : baseConfigArray;
+
+        if (configArray.length > 0) {
+            configArray.unshift(...parentConfigArray);
+        } else {
+            configArray = parentConfigArray;
+        }
+
+        // Cache and return.
+        return this._cacheConfig(directoryPath, configArray);
+    }
+
+    /**
+     * Freeze and cache a given config.
+     * @param {string} directoryPath The path to a directory as a cache key.
+     * @param {ConfigArray} configArray The config array as a cache value.
+     * @returns {ConfigArray} The `configArray` (frozen).
+     */
+    _cacheConfig(directoryPath, configArray) {
+        const { configCache } = internalSlotsMap.get(this);
+
+        Object.freeze(configArray);
+        configCache.set(directoryPath, configArray);
+
+        return configArray;
+    }
+
+    /**
+     * Finalize a given config array.
+     * Concatenate `--config` and other CLI options.
+     * @param {ConfigArray} configArray The parent config array.
+     * @param {string} directoryPath The path to the leaf directory to find config files.
+     * @param {boolean} ignoreNotFoundError If `true` then it doesn't throw `ConfigurationNotFoundError`.
+     * @returns {ConfigArray} The loaded config.
+     * @private
+     */
+    _finalizeConfigArray(configArray, directoryPath, ignoreNotFoundError) {
+        const {
+            cliConfigArray,
+            configArrayFactory,
+            finalizeCache,
+            useEslintrc,
+            builtInRules
+        } = internalSlotsMap.get(this);
+
+        let finalConfigArray = finalizeCache.get(configArray);
+
+        if (!finalConfigArray) {
+            finalConfigArray = configArray;
+
+            // Load the personal config if there are no regular config files.
+            if (
+                useEslintrc &&
+                configArray.every(c => !c.filePath) &&
+                cliConfigArray.every(c => !c.filePath) // `--config` option can be a file.
+            ) {
+                const homePath = os.homedir();
+
+                debug("Loading the config file of the home directory:", homePath);
+
+                const personalConfigArray = configArrayFactory.loadInDirectory(
+                    homePath,
+                    { name: "PersonalConfig" }
+                );
+
+                if (
+                    personalConfigArray.length > 0 &&
+                    !directoryPath.startsWith(homePath)
+                ) {
+                    const lastElement =
+                        personalConfigArray[personalConfigArray.length - 1];
+
+                    emitDeprecationWarning(
+                        lastElement.filePath,
+                        "ESLINT_PERSONAL_CONFIG_LOAD"
+                    );
+                }
+
+                finalConfigArray = finalConfigArray.concat(personalConfigArray);
+            }
+
+            // Apply CLI options.
+            if (cliConfigArray.length > 0) {
+                finalConfigArray = finalConfigArray.concat(cliConfigArray);
+            }
+
+            // Validate rule settings and environments.
+            const validator = new ConfigValidator({
+                builtInRules
+            });
+
+            validator.validateConfigArray(finalConfigArray);
+
+            // Cache it.
+            Object.freeze(finalConfigArray);
+            finalizeCache.set(configArray, finalConfigArray);
+
+            debug(
+                "Configuration was determined: %o on %s",
+                finalConfigArray,
+                directoryPath
+            );
+        }
+
+        // At least one element (the default ignore patterns) exists.
+        if (!ignoreNotFoundError && useEslintrc && finalConfigArray.length <= 1) {
+            throw new ConfigurationNotFoundError(directoryPath);
+        }
+
+        return finalConfigArray;
+    }
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+export { CascadingConfigArrayFactory };

node_modules/@eslint/eslintrc/lib/config-array/config-array.js

@@ -0,0 +1,510 @@
+/**
+ * @fileoverview `ConfigArray` class.
+ *
+ * `ConfigArray` class expresses the full of a configuration. It has the entry
+ * config file, base config files that were extended, loaded parsers, and loaded
+ * plugins.
+ *
+ * `ConfigArray` class provides three properties and two methods.
+ *
+ * - `pluginEnvironments`
+ * - `pluginProcessors`
+ * - `pluginRules`
+ *      The `Map` objects that contain the members of all plugins that this
+ *      config array contains. Those map objects don't have mutation methods.
+ *      Those keys are the member ID such as `pluginId/memberName`.
+ * - `isRoot()`
+ *      If `true` then this configuration has `root:true` property.
+ * - `extractConfig(filePath)`
+ *      Extract the final configuration for a given file. This means merging
+ *      every config array element which that `criteria` property matched. The
+ *      `filePath` argument must be an absolute path.
+ *
+ * `ConfigArrayFactory` provides the loading logic of config files.
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import { ExtractedConfig } from "./extracted-config.js";
+import { IgnorePattern } from "./ignore-pattern.js";
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+// Define types for VSCode IntelliSense.
+/** @typedef {import("../../shared/types").Environment} Environment */
+/** @typedef {import("../../shared/types").GlobalConf} GlobalConf */
+/** @typedef {import("../../shared/types").RuleConf} RuleConf */
+/** @typedef {import("../../shared/types").Rule} Rule */
+/** @typedef {import("../../shared/types").Plugin} Plugin */
+/** @typedef {import("../../shared/types").Processor} Processor */
+/** @typedef {import("./config-dependency").DependentParser} DependentParser */
+/** @typedef {import("./config-dependency").DependentPlugin} DependentPlugin */
+/** @typedef {import("./override-tester")["OverrideTester"]} OverrideTester */
+
+/**
+ * @typedef {Object} ConfigArrayElement
+ * @property {string} name The name of this config element.
+ * @property {string} filePath The path to the source file of this config element.
+ * @property {InstanceType<OverrideTester>|null} criteria The tester for the `files` and `excludedFiles` of this config element.
+ * @property {Record<string, boolean>|undefined} env The environment settings.
+ * @property {Record<string, GlobalConf>|undefined} globals The global variable settings.
+ * @property {IgnorePattern|undefined} ignorePattern The ignore patterns.
+ * @property {boolean|undefined} noInlineConfig The flag that disables directive comments.
+ * @property {DependentParser|undefined} parser The parser loader.
+ * @property {Object|undefined} parserOptions The parser options.
+ * @property {Record<string, DependentPlugin>|undefined} plugins The plugin loaders.
+ * @property {string|undefined} processor The processor name to refer plugin's processor.
+ * @property {boolean|undefined} reportUnusedDisableDirectives The flag to report unused `eslint-disable` comments.
+ * @property {boolean|undefined} root The flag to express root.
+ * @property {Record<string, RuleConf>|undefined} rules The rule settings
+ * @property {Object|undefined} settings The shared settings.
+ * @property {"config" | "ignore" | "implicit-processor"} type The element type.
+ */
+
+/**
+ * @typedef {Object} ConfigArrayInternalSlots
+ * @property {Map<string, ExtractedConfig>} cache The cache to extract configs.
+ * @property {ReadonlyMap<string, Environment>|null} envMap The map from environment ID to environment definition.
+ * @property {ReadonlyMap<string, Processor>|null} processorMap The map from processor ID to environment definition.
+ * @property {ReadonlyMap<string, Rule>|null} ruleMap The map from rule ID to rule definition.
+ */
+
+/** @type {WeakMap<ConfigArray, ConfigArrayInternalSlots>} */
+const internalSlotsMap = new class extends WeakMap {
+    get(key) {
+        let value = super.get(key);
+
+        if (!value) {
+            value = {
+                cache: new Map(),
+                envMap: null,
+                processorMap: null,
+                ruleMap: null
+            };
+            super.set(key, value);
+        }
+
+        return value;
+    }
+}();
+
+/**
+ * Get the indices which are matched to a given file.
+ * @param {ConfigArrayElement[]} elements The elements.
+ * @param {string} filePath The path to a target file.
+ * @returns {number[]} The indices.
+ */
+function getMatchedIndices(elements, filePath) {
+    const indices = [];
+
+    for (let i = elements.length - 1; i >= 0; --i) {
+        const element = elements[i];
+
+        if (!element.criteria || (filePath && element.criteria.test(filePath))) {
+            indices.push(i);
+        }
+    }
+
+    return indices;
+}
+
+/**
+ * Check if a value is a non-null object.
+ * @param {any} x The value to check.
+ * @returns {boolean} `true` if the value is a non-null object.
+ */
+function isNonNullObject(x) {
+    return typeof x === "object" && x !== null;
+}
+
+/**
+ * Merge two objects.
+ *
+ * Assign every property values of `y` to `x` if `x` doesn't have the property.
+ * If `x`'s property value is an object, it does recursive.
+ * @param {Object} target The destination to merge
+ * @param {Object|undefined} source The source to merge.
+ * @returns {void}
+ */
+function mergeWithoutOverwrite(target, source) {
+    if (!isNonNullObject(source)) {
+        return;
+    }
+
+    for (const key of Object.keys(source)) {
+        if (key === "__proto__") {
+            continue;
+        }
+
+        if (isNonNullObject(target[key])) {
+            mergeWithoutOverwrite(target[key], source[key]);
+        } else if (target[key] === void 0) {
+            if (isNonNullObject(source[key])) {
+                target[key] = Array.isArray(source[key]) ? [] : {};
+                mergeWithoutOverwrite(target[key], source[key]);
+            } else if (source[key] !== void 0) {
+                target[key] = source[key];
+            }
+        }
+    }
+}
+
+/**
+ * The error for plugin conflicts.
+ */
+class PluginConflictError extends Error {
+
+    /**
+     * Initialize this error object.
+     * @param {string} pluginId The plugin ID.
+     * @param {{filePath:string, importerName:string}[]} plugins The resolved plugins.
+     */
+    constructor(pluginId, plugins) {
+        super(`Plugin "${pluginId}" was conflicted between ${plugins.map(p => `"${p.importerName}"`).join(" and ")}.`);
+        this.messageTemplate = "plugin-conflict";
+        this.messageData = { pluginId, plugins };
+    }
+}
+
+/**
+ * Merge plugins.
+ * `target`'s definition is prior to `source`'s.
+ * @param {Record<string, DependentPlugin>} target The destination to merge
+ * @param {Record<string, DependentPlugin>|undefined} source The source to merge.
+ * @returns {void}
+ */
+function mergePlugins(target, source) {
+    if (!isNonNullObject(source)) {
+        return;
+    }
+
+    for (const key of Object.keys(source)) {
+        if (key === "__proto__") {
+            continue;
+        }
+        const targetValue = target[key];
+        const sourceValue = source[key];
+
+        // Adopt the plugin which was found at first.
+        if (targetValue === void 0) {
+            if (sourceValue.error) {
+                throw sourceValue.error;
+            }
+            target[key] = sourceValue;
+        } else if (sourceValue.filePath !== targetValue.filePath) {
+            throw new PluginConflictError(key, [
+                {
+                    filePath: targetValue.filePath,
+                    importerName: targetValue.importerName
+                },
+                {
+                    filePath: sourceValue.filePath,
+                    importerName: sourceValue.importerName
+                }
+            ]);
+        }
+    }
+}
+
+/**
+ * Merge rule configs.
+ * `target`'s definition is prior to `source`'s.
+ * @param {Record<string, Array>} target The destination to merge
+ * @param {Record<string, RuleConf>|undefined} source The source to merge.
+ * @returns {void}
+ */
+function mergeRuleConfigs(target, source) {
+    if (!isNonNullObject(source)) {
+        return;
+    }
+
+    for (const key of Object.keys(source)) {
+        if (key === "__proto__") {
+            continue;
+        }
+        const targetDef = target[key];
+        const sourceDef = source[key];
+
+        // Adopt the rule config which was found at first.
+        if (targetDef === void 0) {
+            if (Array.isArray(sourceDef)) {
+                target[key] = [...sourceDef];
+            } else {
+                target[key] = [sourceDef];
+            }
+
+        /*
+         * If the first found rule config is severity only and the current rule
+         * config has options, merge the severity and the options.
+         */
+        } else if (
+            targetDef.length === 1 &&
+            Array.isArray(sourceDef) &&
+            sourceDef.length >= 2
+        ) {
+            targetDef.push(...sourceDef.slice(1));
+        }
+    }
+}
+
+/**
+ * Create the extracted config.
+ * @param {ConfigArray} instance The config elements.
+ * @param {number[]} indices The indices to use.
+ * @returns {ExtractedConfig} The extracted config.
+ */
+function createConfig(instance, indices) {
+    const config = new ExtractedConfig();
+    const ignorePatterns = [];
+
+    // Merge elements.
+    for (const index of indices) {
+        const element = instance[index];
+
+        // Adopt the parser which was found at first.
+        if (!config.parser && element.parser) {
+            if (element.parser.error) {
+                throw element.parser.error;
+            }
+            config.parser = element.parser;
+        }
+
+        // Adopt the processor which was found at first.
+        if (!config.processor && element.processor) {
+            config.processor = element.processor;
+        }
+
+        // Adopt the noInlineConfig which was found at first.
+        if (config.noInlineConfig === void 0 && element.noInlineConfig !== void 0) {
+            config.noInlineConfig = element.noInlineConfig;
+            config.configNameOfNoInlineConfig = element.name;
+        }
+
+        // Adopt the reportUnusedDisableDirectives which was found at first.
+        if (config.reportUnusedDisableDirectives === void 0 && element.reportUnusedDisableDirectives !== void 0) {
+            config.reportUnusedDisableDirectives = element.reportUnusedDisableDirectives;
+        }
+
+        // Collect ignorePatterns
+        if (element.ignorePattern) {
+            ignorePatterns.push(element.ignorePattern);
+        }
+
+        // Merge others.
+        mergeWithoutOverwrite(config.env, element.env);
+        mergeWithoutOverwrite(config.globals, element.globals);
+        mergeWithoutOverwrite(config.parserOptions, element.parserOptions);
+        mergeWithoutOverwrite(config.settings, element.settings);
+        mergePlugins(config.plugins, element.plugins);
+        mergeRuleConfigs(config.rules, element.rules);
+    }
+
+    // Create the predicate function for ignore patterns.
+    if (ignorePatterns.length > 0) {
+        config.ignores = IgnorePattern.createIgnore(ignorePatterns.reverse());
+    }
+
+    return config;
+}
+
+/**
+ * Collect definitions.
+ * @template T, U
+ * @param {string} pluginId The plugin ID for prefix.
+ * @param {Record<string,T>} defs The definitions to collect.
+ * @param {Map<string, U>} map The map to output.
+ * @returns {void}
+ */
+function collect(pluginId, defs, map) {
+    if (defs) {
+        const prefix = pluginId && `${pluginId}/`;
+
+        for (const [key, value] of Object.entries(defs)) {
+            map.set(`${prefix}${key}`, value);
+        }
+    }
+}
+
+/**
+ * Delete the mutation methods from a given map.
+ * @param {Map<any, any>} map The map object to delete.
+ * @returns {void}
+ */
+function deleteMutationMethods(map) {
+    Object.defineProperties(map, {
+        clear: { configurable: true, value: void 0 },
+        delete: { configurable: true, value: void 0 },
+        set: { configurable: true, value: void 0 }
+    });
+}
+
+/**
+ * Create `envMap`, `processorMap`, `ruleMap` with the plugins in the config array.
+ * @param {ConfigArrayElement[]} elements The config elements.
+ * @param {ConfigArrayInternalSlots} slots The internal slots.
+ * @returns {void}
+ */
+function initPluginMemberMaps(elements, slots) {
+    const processed = new Set();
+
+    slots.envMap = new Map();
+    slots.processorMap = new Map();
+    slots.ruleMap = new Map();
+
+    for (const element of elements) {
+        if (!element.plugins) {
+            continue;
+        }
+
+        for (const [pluginId, value] of Object.entries(element.plugins)) {
+            const plugin = value.definition;
+
+            if (!plugin || processed.has(pluginId)) {
+                continue;
+            }
+            processed.add(pluginId);
+
+            collect(pluginId, plugin.environments, slots.envMap);
+            collect(pluginId, plugin.processors, slots.processorMap);
+            collect(pluginId, plugin.rules, slots.ruleMap);
+        }
+    }
+
+    deleteMutationMethods(slots.envMap);
+    deleteMutationMethods(slots.processorMap);
+    deleteMutationMethods(slots.ruleMap);
+}
+
+/**
+ * Create `envMap`, `processorMap`, `ruleMap` with the plugins in the config array.
+ * @param {ConfigArray} instance The config elements.
+ * @returns {ConfigArrayInternalSlots} The extracted config.
+ */
+function ensurePluginMemberMaps(instance) {
+    const slots = internalSlotsMap.get(instance);
+
+    if (!slots.ruleMap) {
+        initPluginMemberMaps(instance, slots);
+    }
+
+    return slots;
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/**
+ * The Config Array.
+ *
+ * `ConfigArray` instance contains all settings, parsers, and plugins.
+ * You need to call `ConfigArray#extractConfig(filePath)` method in order to
+ * extract, merge and get only the config data which is related to an arbitrary
+ * file.
+ * @extends {Array<ConfigArrayElement>}
+ */
+class ConfigArray extends Array {
+
+    /**
+     * Get the plugin environments.
+     * The returned map cannot be mutated.
+     * @type {ReadonlyMap<string, Environment>} The plugin environments.
+     */
+    get pluginEnvironments() {
+        return ensurePluginMemberMaps(this).envMap;
+    }
+
+    /**
+     * Get the plugin processors.
+     * The returned map cannot be mutated.
+     * @type {ReadonlyMap<string, Processor>} The plugin processors.
+     */
+    get pluginProcessors() {
+        return ensurePluginMemberMaps(this).processorMap;
+    }
+
+    /**
+     * Get the plugin rules.
+     * The returned map cannot be mutated.
+     * @returns {ReadonlyMap<string, Rule>} The plugin rules.
+     */
+    get pluginRules() {
+        return ensurePluginMemberMaps(this).ruleMap;
+    }
+
+    /**
+     * Check if this config has `root` flag.
+     * @returns {boolean} `true` if this config array is root.
+     */
+    isRoot() {
+        for (let i = this.length - 1; i >= 0; --i) {
+            const root = this[i].root;
+
+            if (typeof root === "boolean") {
+                return root;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Extract the config data which is related to a given file.
+     * @param {string} filePath The absolute path to the target file.
+     * @returns {ExtractedConfig} The extracted config data.
+     */
+    extractConfig(filePath) {
+        const { cache } = internalSlotsMap.get(this);
+        const indices = getMatchedIndices(this, filePath);
+        const cacheKey = indices.join(",");
+
+        if (!cache.has(cacheKey)) {
+            cache.set(cacheKey, createConfig(this, indices));
+        }
+
+        return cache.get(cacheKey);
+    }
+
+    /**
+     * Check if a given path is an additional lint target.
+     * @param {string} filePath The absolute path to the target file.
+     * @returns {boolean} `true` if the file is an additional lint target.
+     */
+    isAdditionalTargetPath(filePath) {
+        for (const { criteria, type } of this) {
+            if (
+                type === "config" &&
+                criteria &&
+                !criteria.endsWithWildcard &&
+                criteria.test(filePath)
+            ) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
+
+/**
+ * Get the used extracted configs.
+ * CLIEngine will use this method to collect used deprecated rules.
+ * @param {ConfigArray} instance The config array object to get.
+ * @returns {ExtractedConfig[]} The used extracted configs.
+ * @private
+ */
+function getUsedExtractedConfigs(instance) {
+    const { cache } = internalSlotsMap.get(instance);
+
+    return Array.from(cache.values());
+}
+
+
+export {
+    ConfigArray,
+    getUsedExtractedConfigs
+};

node_modules/@eslint/eslintrc/lib/config-array/config-dependency.js

@@ -0,0 +1,124 @@
+/**
+ * @fileoverview `ConfigDependency` class.
+ *
+ * `ConfigDependency` class expresses a loaded parser or plugin.
+ *
+ * If the parser or plugin was loaded successfully, it has `definition` property
+ * and `filePath` property. Otherwise, it has `error` property.
+ *
+ * When `JSON.stringify()` converted a `ConfigDependency` object to a JSON, it
+ * omits `definition` property.
+ *
+ * `ConfigArrayFactory` creates `ConfigDependency` objects when it loads parsers
+ * or plugins.
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+import util from "util";
+
+/**
+ * The class is to store parsers or plugins.
+ * This class hides the loaded object from `JSON.stringify()` and `console.log`.
+ * @template T
+ */
+class ConfigDependency {
+
+    /**
+     * Initialize this instance.
+     * @param {Object} data The dependency data.
+     * @param {T} [data.definition] The dependency if the loading succeeded.
+     * @param {T} [data.original] The original, non-normalized dependency if the loading succeeded.
+     * @param {Error} [data.error] The error object if the loading failed.
+     * @param {string} [data.filePath] The actual path to the dependency if the loading succeeded.
+     * @param {string} data.id The ID of this dependency.
+     * @param {string} data.importerName The name of the config file which loads this dependency.
+     * @param {string} data.importerPath The path to the config file which loads this dependency.
+     */
+    constructor({
+        definition = null,
+        original = null,
+        error = null,
+        filePath = null,
+        id,
+        importerName,
+        importerPath
+    }) {
+
+        /**
+         * The loaded dependency if the loading succeeded.
+         * @type {T|null}
+         */
+        this.definition = definition;
+
+        /**
+         * The original dependency as loaded directly from disk if the loading succeeded.
+         * @type {T|null}
+         */
+        this.original = original;
+
+        /**
+         * The error object if the loading failed.
+         * @type {Error|null}
+         */
+        this.error = error;
+
+        /**
+         * The loaded dependency if the loading succeeded.
+         * @type {string|null}
+         */
+        this.filePath = filePath;
+
+        /**
+         * The ID of this dependency.
+         * @type {string}
+         */
+        this.id = id;
+
+        /**
+         * The name of the config file which loads this dependency.
+         * @type {string}
+         */
+        this.importerName = importerName;
+
+        /**
+         * The path to the config file which loads this dependency.
+         * @type {string}
+         */
+        this.importerPath = importerPath;
+    }
+
+    // eslint-disable-next-line jsdoc/require-description
+    /**
+     * @returns {Object} a JSON compatible object.
+     */
+    toJSON() {
+        const obj = this[util.inspect.custom]();
+
+        // Display `error.message` (`Error#message` is unenumerable).
+        if (obj.error instanceof Error) {
+            obj.error = { ...obj.error, message: obj.error.message };
+        }
+
+        return obj;
+    }
+
+    // eslint-disable-next-line jsdoc/require-description
+    /**
+     * @returns {Object} an object to display by `console.log()`.
+     */
+    [util.inspect.custom]() {
+        const {
+            definition: _ignore1, // eslint-disable-line no-unused-vars
+            original: _ignore2, // eslint-disable-line no-unused-vars
+            ...obj
+        } = this;
+
+        return obj;
+    }
+}
+
+/** @typedef {ConfigDependency<import("../../shared/types").Parser>} DependentParser */
+/** @typedef {ConfigDependency<import("../../shared/types").Plugin>} DependentPlugin */
+
+export { ConfigDependency };

node_modules/@eslint/eslintrc/lib/config-array/extracted-config.js

@@ -0,0 +1,145 @@
+/**
+ * @fileoverview `ExtractedConfig` class.
+ *
+ * `ExtractedConfig` class expresses a final configuration for a specific file.
+ *
+ * It provides one method.
+ *
+ * - `toCompatibleObjectAsConfigFileContent()`
+ *      Convert this configuration to the compatible object as the content of
+ *      config files. It converts the loaded parser and plugins to strings.
+ *      `CLIEngine#getConfigForFile(filePath)` method uses this method.
+ *
+ * `ConfigArray#extractConfig(filePath)` creates a `ExtractedConfig` instance.
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+import { IgnorePattern } from "./ignore-pattern.js";
+
+// For VSCode intellisense
+/** @typedef {import("../../shared/types").ConfigData} ConfigData */
+/** @typedef {import("../../shared/types").GlobalConf} GlobalConf */
+/** @typedef {import("../../shared/types").SeverityConf} SeverityConf */
+/** @typedef {import("./config-dependency").DependentParser} DependentParser */
+/** @typedef {import("./config-dependency").DependentPlugin} DependentPlugin */
+
+/**
+ * Check if `xs` starts with `ys`.
+ * @template T
+ * @param {T[]} xs The array to check.
+ * @param {T[]} ys The array that may be the first part of `xs`.
+ * @returns {boolean} `true` if `xs` starts with `ys`.
+ */
+function startsWith(xs, ys) {
+    return xs.length >= ys.length && ys.every((y, i) => y === xs[i]);
+}
+
+/**
+ * The class for extracted config data.
+ */
+class ExtractedConfig {
+    constructor() {
+
+        /**
+         * The config name what `noInlineConfig` setting came from.
+         * @type {string}
+         */
+        this.configNameOfNoInlineConfig = "";
+
+        /**
+         * Environments.
+         * @type {Record<string, boolean>}
+         */
+        this.env = {};
+
+        /**
+         * Global variables.
+         * @type {Record<string, GlobalConf>}
+         */
+        this.globals = {};
+
+        /**
+         * The glob patterns that ignore to lint.
+         * @type {(((filePath:string, dot?:boolean) => boolean) & { basePath:string; patterns:string[] }) | undefined}
+         */
+        this.ignores = void 0;
+
+        /**
+         * The flag that disables directive comments.
+         * @type {boolean|undefined}
+         */
+        this.noInlineConfig = void 0;
+
+        /**
+         * Parser definition.
+         * @type {DependentParser|null}
+         */
+        this.parser = null;
+
+        /**
+         * Options for the parser.
+         * @type {Object}
+         */
+        this.parserOptions = {};
+
+        /**
+         * Plugin definitions.
+         * @type {Record<string, DependentPlugin>}
+         */
+        this.plugins = {};
+
+        /**
+         * Processor ID.
+         * @type {string|null}
+         */
+        this.processor = null;
+
+        /**
+         * The flag that reports unused `eslint-disable` directive comments.
+         * @type {boolean|undefined}
+         */
+        this.reportUnusedDisableDirectives = void 0;
+
+        /**
+         * Rule settings.
+         * @type {Record<string, [SeverityConf, ...any[]]>}
+         */
+        this.rules = {};
+
+        /**
+         * Shared settings.
+         * @type {Object}
+         */
+        this.settings = {};
+    }
+
+    /**
+     * Convert this config to the compatible object as a config file content.
+     * @returns {ConfigData} The converted object.
+     */
+    toCompatibleObjectAsConfigFileContent() {
+        const {
+            /* eslint-disable no-unused-vars */
+            configNameOfNoInlineConfig: _ignore1,
+            processor: _ignore2,
+            /* eslint-enable no-unused-vars */
+            ignores,
+            ...config
+        } = this;
+
+        config.parser = config.parser && config.parser.filePath;
+        config.plugins = Object.keys(config.plugins).filter(Boolean).reverse();
+        config.ignorePatterns = ignores ? ignores.patterns : [];
+
+        // Strip the default patterns from `ignorePatterns`.
+        if (startsWith(config.ignorePatterns, IgnorePattern.DefaultPatterns)) {
+            config.ignorePatterns =
+                config.ignorePatterns.slice(IgnorePattern.DefaultPatterns.length);
+        }
+
+        return config;
+    }
+}
+
+export { ExtractedConfig };

node_modules/@eslint/eslintrc/lib/config-array/ignore-pattern.js

@@ -0,0 +1,238 @@
+/**
+ * @fileoverview `IgnorePattern` class.
+ *
+ * `IgnorePattern` class has the set of glob patterns and the base path.
+ *
+ * It provides two static methods.
+ *
+ * - `IgnorePattern.createDefaultIgnore(cwd)`
+ *      Create the default predicate function.
+ * - `IgnorePattern.createIgnore(ignorePatterns)`
+ *      Create the predicate function from multiple `IgnorePattern` objects.
+ *
+ * It provides two properties and a method.
+ *
+ * - `patterns`
+ *      The glob patterns that ignore to lint.
+ * - `basePath`
+ *      The base path of the glob patterns. If absolute paths existed in the
+ *      glob patterns, those are handled as relative paths to the base path.
+ * - `getPatternsRelativeTo(basePath)`
+ *      Get `patterns` as modified for a given base path. It modifies the
+ *      absolute paths in the patterns as prepending the difference of two base
+ *      paths.
+ *
+ * `ConfigArrayFactory` creates `IgnorePattern` objects when it processes
+ * `ignorePatterns` properties.
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import assert from "assert";
+import path from "path";
+import ignore from "ignore";
+import debugOrig from "debug";
+
+const debug = debugOrig("eslintrc:ignore-pattern");
+
+/** @typedef {ReturnType<import("ignore").default>} Ignore */
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Get the path to the common ancestor directory of given paths.
+ * @param {string[]} sourcePaths The paths to calculate the common ancestor.
+ * @returns {string} The path to the common ancestor directory.
+ */
+function getCommonAncestorPath(sourcePaths) {
+    let result = sourcePaths[0];
+
+    for (let i = 1; i < sourcePaths.length; ++i) {
+        const a = result;
+        const b = sourcePaths[i];
+
+        // Set the shorter one (it's the common ancestor if one includes the other).
+        result = a.length < b.length ? a : b;
+
+        // Set the common ancestor.
+        for (let j = 0, lastSepPos = 0; j < a.length && j < b.length; ++j) {
+            if (a[j] !== b[j]) {
+                result = a.slice(0, lastSepPos);
+                break;
+            }
+            if (a[j] === path.sep) {
+                lastSepPos = j;
+            }
+        }
+    }
+
+    let resolvedResult = result || path.sep;
+
+    // if Windows common ancestor is root of drive must have trailing slash to be absolute.
+    if (resolvedResult && resolvedResult.endsWith(":") && process.platform === "win32") {
+        resolvedResult += path.sep;
+    }
+    return resolvedResult;
+}
+
+/**
+ * Make relative path.
+ * @param {string} from The source path to get relative path.
+ * @param {string} to The destination path to get relative path.
+ * @returns {string} The relative path.
+ */
+function relative(from, to) {
+    const relPath = path.relative(from, to);
+
+    if (path.sep === "/") {
+        return relPath;
+    }
+    return relPath.split(path.sep).join("/");
+}
+
+/**
+ * Get the trailing slash if existed.
+ * @param {string} filePath The path to check.
+ * @returns {string} The trailing slash if existed.
+ */
+function dirSuffix(filePath) {
+    const isDir = (
+        filePath.endsWith(path.sep) ||
+        (process.platform === "win32" && filePath.endsWith("/"))
+    );
+
+    return isDir ? "/" : "";
+}
+
+const DefaultPatterns = Object.freeze(["/**/node_modules/*"]);
+const DotPatterns = Object.freeze([".*", "!.eslintrc.*", "!../"]);
+
+//------------------------------------------------------------------------------
+// Public
+//------------------------------------------------------------------------------
+
+class IgnorePattern {
+
+    /**
+     * The default patterns.
+     * @type {string[]}
+     */
+    static get DefaultPatterns() {
+        return DefaultPatterns;
+    }
+
+    /**
+     * Create the default predicate function.
+     * @param {string} cwd The current working directory.
+     * @returns {((filePath:string, dot:boolean) => boolean) & {basePath:string; patterns:string[]}}
+     * The preficate function.
+     * The first argument is an absolute path that is checked.
+     * The second argument is the flag to not ignore dotfiles.
+     * If the predicate function returned `true`, it means the path should be ignored.
+     */
+    static createDefaultIgnore(cwd) {
+        return this.createIgnore([new IgnorePattern(DefaultPatterns, cwd)]);
+    }
+
+    /**
+     * Create the predicate function from multiple `IgnorePattern` objects.
+     * @param {IgnorePattern[]} ignorePatterns The list of ignore patterns.
+     * @returns {((filePath:string, dot?:boolean) => boolean) & {basePath:string; patterns:string[]}}
+     * The preficate function.
+     * The first argument is an absolute path that is checked.
+     * The second argument is the flag to not ignore dotfiles.
+     * If the predicate function returned `true`, it means the path should be ignored.
+     */
+    static createIgnore(ignorePatterns) {
+        debug("Create with: %o", ignorePatterns);
+
+        const basePath = getCommonAncestorPath(ignorePatterns.map(p => p.basePath));
+        const patterns = [].concat(
+            ...ignorePatterns.map(p => p.getPatternsRelativeTo(basePath))
+        );
+        const ig = ignore({ allowRelativePaths: true }).add([...DotPatterns, ...patterns]);
+        const dotIg = ignore({ allowRelativePaths: true }).add(patterns);
+
+        debug("  processed: %o", { basePath, patterns });
+
+        return Object.assign(
+            (filePath, dot = false) => {
+                assert(path.isAbsolute(filePath), "'filePath' should be an absolute path.");
+                const relPathRaw = relative(basePath, filePath);
+                const relPath = relPathRaw && (relPathRaw + dirSuffix(filePath));
+                const adoptedIg = dot ? dotIg : ig;
+                const result = relPath !== "" && adoptedIg.ignores(relPath);
+
+                debug("Check", { filePath, dot, relativePath: relPath, result });
+                return result;
+            },
+            { basePath, patterns }
+        );
+    }
+
+    /**
+     * Initialize a new `IgnorePattern` instance.
+     * @param {string[]} patterns The glob patterns that ignore to lint.
+     * @param {string} basePath The base path of `patterns`.
+     */
+    constructor(patterns, basePath) {
+        assert(path.isAbsolute(basePath), "'basePath' should be an absolute path.");
+
+        /**
+         * The glob patterns that ignore to lint.
+         * @type {string[]}
+         */
+        this.patterns = patterns;
+
+        /**
+         * The base path of `patterns`.
+         * @type {string}
+         */
+        this.basePath = basePath;
+
+        /**
+         * If `true` then patterns which don't start with `/` will match the paths to the outside of `basePath`. Defaults to `false`.
+         *
+         * It's set `true` for `.eslintignore`, `package.json`, and `--ignore-path` for backward compatibility.
+         * It's `false` as-is for `ignorePatterns` property in config files.
+         * @type {boolean}
+         */
+        this.loose = false;
+    }
+
+    /**
+     * Get `patterns` as modified for a given base path. It modifies the
+     * absolute paths in the patterns as prepending the difference of two base
+     * paths.
+     * @param {string} newBasePath The base path.
+     * @returns {string[]} Modifired patterns.
+     */
+    getPatternsRelativeTo(newBasePath) {
+        assert(path.isAbsolute(newBasePath), "'newBasePath' should be an absolute path.");
+        const { basePath, loose, patterns } = this;
+
+        if (newBasePath === basePath) {
+            return patterns;
+        }
+        const prefix = `/${relative(newBasePath, basePath)}`;
+
+        return patterns.map(pattern => {
+            const negative = pattern.startsWith("!");
+            const head = negative ? "!" : "";
+            const body = negative ? pattern.slice(1) : pattern;
+
+            if (body.startsWith("/") || body.startsWith("../")) {
+                return `${head}${prefix}${body}`;
+            }
+            return loose ? pattern : `${head}${prefix}/**/${body}`;
+        });
+    }
+}
+
+export { IgnorePattern };

node_modules/@eslint/eslintrc/lib/config-array/index.js

@@ -0,0 +1,19 @@
+/**
+ * @fileoverview `ConfigArray` class.
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+import { ConfigArray, getUsedExtractedConfigs } from "./config-array.js";
+import { ConfigDependency } from "./config-dependency.js";
+import { ExtractedConfig } from "./extracted-config.js";
+import { IgnorePattern } from "./ignore-pattern.js";
+import { OverrideTester } from "./override-tester.js";
+
+export {
+    ConfigArray,
+    ConfigDependency,
+    ExtractedConfig,
+    IgnorePattern,
+    OverrideTester,
+    getUsedExtractedConfigs
+};

node_modules/@eslint/eslintrc/lib/config-array/override-tester.js

@@ -0,0 +1,225 @@
+/**
+ * @fileoverview `OverrideTester` class.
+ *
+ * `OverrideTester` class handles `files` property and `excludedFiles` property
+ * of `overrides` config.
+ *
+ * It provides one method.
+ *
+ * - `test(filePath)`
+ *      Test if a file path matches the pair of `files` property and
+ *      `excludedFiles` property. The `filePath` argument must be an absolute
+ *      path.
+ *
+ * `ConfigArrayFactory` creates `OverrideTester` objects when it processes
+ * `overrides` properties.
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+import assert from "assert";
+import path from "path";
+import util from "util";
+import minimatch from "minimatch";
+
+const { Minimatch } = minimatch;
+
+const minimatchOpts = { dot: true, matchBase: true };
+
+/**
+ * @typedef {Object} Pattern
+ * @property {InstanceType<Minimatch>[] | null} includes The positive matchers.
+ * @property {InstanceType<Minimatch>[] | null} excludes The negative matchers.
+ */
+
+/**
+ * Normalize a given pattern to an array.
+ * @param {string|string[]|undefined} patterns A glob pattern or an array of glob patterns.
+ * @returns {string[]|null} Normalized patterns.
+ * @private
+ */
+function normalizePatterns(patterns) {
+    if (Array.isArray(patterns)) {
+        return patterns.filter(Boolean);
+    }
+    if (typeof patterns === "string" && patterns) {
+        return [patterns];
+    }
+    return [];
+}
+
+/**
+ * Create the matchers of given patterns.
+ * @param {string[]} patterns The patterns.
+ * @returns {InstanceType<Minimatch>[] | null} The matchers.
+ */
+function toMatcher(patterns) {
+    if (patterns.length === 0) {
+        return null;
+    }
+    return patterns.map(pattern => {
+        if (/^\.[/\\]/u.test(pattern)) {
+            return new Minimatch(
+                pattern.slice(2),
+
+                // `./*.js` should not match with `subdir/foo.js`
+                { ...minimatchOpts, matchBase: false }
+            );
+        }
+        return new Minimatch(pattern, minimatchOpts);
+    });
+}
+
+/**
+ * Convert a given matcher to string.
+ * @param {Pattern} matchers The matchers.
+ * @returns {string} The string expression of the matcher.
+ */
+function patternToJson({ includes, excludes }) {
+    return {
+        includes: includes && includes.map(m => m.pattern),
+        excludes: excludes && excludes.map(m => m.pattern)
+    };
+}
+
+/**
+ * The class to test given paths are matched by the patterns.
+ */
+class OverrideTester {
+
+    /**
+     * Create a tester with given criteria.
+     * If there are no criteria, returns `null`.
+     * @param {string|string[]} files The glob patterns for included files.
+     * @param {string|string[]} excludedFiles The glob patterns for excluded files.
+     * @param {string} basePath The path to the base directory to test paths.
+     * @returns {OverrideTester|null} The created instance or `null`.
+     */
+    static create(files, excludedFiles, basePath) {
+        const includePatterns = normalizePatterns(files);
+        const excludePatterns = normalizePatterns(excludedFiles);
+        let endsWithWildcard = false;
+
+        if (includePatterns.length === 0) {
+            return null;
+        }
+
+        // Rejects absolute paths or relative paths to parents.
+        for (const pattern of includePatterns) {
+            if (path.isAbsolute(pattern) || pattern.includes("..")) {
+                throw new Error(`Invalid override pattern (expected relative path not containing '..'): ${pattern}`);
+            }
+            if (pattern.endsWith("*")) {
+                endsWithWildcard = true;
+            }
+        }
+        for (const pattern of excludePatterns) {
+            if (path.isAbsolute(pattern) || pattern.includes("..")) {
+                throw new Error(`Invalid override pattern (expected relative path not containing '..'): ${pattern}`);
+            }
+        }
+
+        const includes = toMatcher(includePatterns);
+        const excludes = toMatcher(excludePatterns);
+
+        return new OverrideTester(
+            [{ includes, excludes }],
+            basePath,
+            endsWithWildcard
+        );
+    }
+
+    /**
+     * Combine two testers by logical and.
+     * If either of the testers was `null`, returns the other tester.
+     * The `basePath` property of the two must be the same value.
+     * @param {OverrideTester|null} a A tester.
+     * @param {OverrideTester|null} b Another tester.
+     * @returns {OverrideTester|null} Combined tester.
+     */
+    static and(a, b) {
+        if (!b) {
+            return a && new OverrideTester(
+                a.patterns,
+                a.basePath,
+                a.endsWithWildcard
+            );
+        }
+        if (!a) {
+            return new OverrideTester(
+                b.patterns,
+                b.basePath,
+                b.endsWithWildcard
+            );
+        }
+
+        assert.strictEqual(a.basePath, b.basePath);
+        return new OverrideTester(
+            a.patterns.concat(b.patterns),
+            a.basePath,
+            a.endsWithWildcard || b.endsWithWildcard
+        );
+    }
+
+    /**
+     * Initialize this instance.
+     * @param {Pattern[]} patterns The matchers.
+     * @param {string} basePath The base path.
+     * @param {boolean} endsWithWildcard If `true` then a pattern ends with `*`.
+     */
+    constructor(patterns, basePath, endsWithWildcard = false) {
+
+        /** @type {Pattern[]} */
+        this.patterns = patterns;
+
+        /** @type {string} */
+        this.basePath = basePath;
+
+        /** @type {boolean} */
+        this.endsWithWildcard = endsWithWildcard;
+    }
+
+    /**
+     * Test if a given path is matched or not.
+     * @param {string} filePath The absolute path to the target file.
+     * @returns {boolean} `true` if the path was matched.
+     */
+    test(filePath) {
+        if (typeof filePath !== "string" || !path.isAbsolute(filePath)) {
+            throw new Error(`'filePath' should be an absolute path, but got ${filePath}.`);
+        }
+        const relativePath = path.relative(this.basePath, filePath);
+
+        return this.patterns.every(({ includes, excludes }) => (
+            (!includes || includes.some(m => m.match(relativePath))) &&
+            (!excludes || !excludes.some(m => m.match(relativePath)))
+        ));
+    }
+
+    // eslint-disable-next-line jsdoc/require-description
+    /**
+     * @returns {Object} a JSON compatible object.
+     */
+    toJSON() {
+        if (this.patterns.length === 1) {
+            return {
+                ...patternToJson(this.patterns[0]),
+                basePath: this.basePath
+            };
+        }
+        return {
+            AND: this.patterns.map(patternToJson),
+            basePath: this.basePath
+        };
+    }
+
+    // eslint-disable-next-line jsdoc/require-description
+    /**
+     * @returns {Object} an object to display by `console.log()`.
+     */
+    [util.inspect.custom]() {
+        return this.toJSON();
+    }
+}
+
+export { OverrideTester };

node_modules/@eslint/eslintrc/lib/flat-compat.js

@@ -0,0 +1,318 @@
+/**
+ * @fileoverview Compatibility class for flat config.
+ * @author Nicholas C. Zakas
+ */
+
+//-----------------------------------------------------------------------------
+// Requirements
+//-----------------------------------------------------------------------------
+
+import createDebug from "debug";
+import path from "path";
+
+import environments from "../conf/environments.js";
+import { ConfigArrayFactory } from "./config-array-factory.js";
+
+//-----------------------------------------------------------------------------
+// Helpers
+//-----------------------------------------------------------------------------
+
+/** @typedef {import("../../shared/types").Environment} Environment */
+/** @typedef {import("../../shared/types").Processor} Processor */
+
+const debug = createDebug("eslintrc:flat-compat");
+const cafactory = Symbol("cafactory");
+
+/**
+ * Translates an ESLintRC-style config object into a flag-config-style config
+ * object.
+ * @param {Object} eslintrcConfig An ESLintRC-style config object.
+ * @param {Object} options Options to help translate the config.
+ * @param {string} options.resolveConfigRelativeTo To the directory to resolve
+ *      configs from.
+ * @param {string} options.resolvePluginsRelativeTo The directory to resolve
+ *      plugins from.
+ * @param {ReadOnlyMap<string,Environment>} options.pluginEnvironments A map of plugin environment
+ *      names to objects.
+ * @param {ReadOnlyMap<string,Processor>} options.pluginProcessors A map of plugin processor
+ *      names to objects.
+ * @returns {Object} A flag-config-style config object.
+ */
+function translateESLintRC(eslintrcConfig, {
+    resolveConfigRelativeTo,
+    resolvePluginsRelativeTo,
+    pluginEnvironments,
+    pluginProcessors
+}) {
+
+    const flatConfig = {};
+    const configs = [];
+    const languageOptions = {};
+    const linterOptions = {};
+    const keysToCopy = ["settings", "rules", "processor"];
+    const languageOptionsKeysToCopy = ["globals", "parser", "parserOptions"];
+    const linterOptionsKeysToCopy = ["noInlineConfig", "reportUnusedDisableDirectives"];
+
+    // copy over simple translations
+    for (const key of keysToCopy) {
+        if (key in eslintrcConfig && typeof eslintrcConfig[key] !== "undefined") {
+            flatConfig[key] = eslintrcConfig[key];
+        }
+    }
+
+    // copy over languageOptions
+    for (const key of languageOptionsKeysToCopy) {
+        if (key in eslintrcConfig && typeof eslintrcConfig[key] !== "undefined") {
+
+            // create the languageOptions key in the flat config
+            flatConfig.languageOptions = languageOptions;
+
+            if (key === "parser") {
+                debug(`Resolving parser '${languageOptions[key]}' relative to ${resolveConfigRelativeTo}`);
+
+                if (eslintrcConfig[key].error) {
+                    throw eslintrcConfig[key].error;
+                }
+
+                languageOptions[key] = eslintrcConfig[key].definition;
+                continue;
+            }
+
+            // clone any object values that are in the eslintrc config
+            if (eslintrcConfig[key] && typeof eslintrcConfig[key] === "object") {
+                languageOptions[key] = {
+                    ...eslintrcConfig[key]
+                };
+            } else {
+                languageOptions[key] = eslintrcConfig[key];
+            }
+        }
+    }
+
+    // copy over linterOptions
+    for (const key of linterOptionsKeysToCopy) {
+        if (key in eslintrcConfig && typeof eslintrcConfig[key] !== "undefined") {
+            flatConfig.linterOptions = linterOptions;
+            linterOptions[key] = eslintrcConfig[key];
+        }
+    }
+
+    // move ecmaVersion a level up
+    if (languageOptions.parserOptions) {
+
+        if ("ecmaVersion" in languageOptions.parserOptions) {
+            languageOptions.ecmaVersion = languageOptions.parserOptions.ecmaVersion;
+            delete languageOptions.parserOptions.ecmaVersion;
+        }
+
+        if ("sourceType" in languageOptions.parserOptions) {
+            languageOptions.sourceType = languageOptions.parserOptions.sourceType;
+            delete languageOptions.parserOptions.sourceType;
+        }
+
+        // check to see if we even need parserOptions anymore and remove it if not
+        if (Object.keys(languageOptions.parserOptions).length === 0) {
+            delete languageOptions.parserOptions;
+        }
+    }
+
+    // overrides
+    if (eslintrcConfig.criteria) {
+        flatConfig.files = [absoluteFilePath => eslintrcConfig.criteria.test(absoluteFilePath)];
+    }
+
+    // translate plugins
+    if (eslintrcConfig.plugins && typeof eslintrcConfig.plugins === "object") {
+        debug(`Translating plugins: ${eslintrcConfig.plugins}`);
+
+        flatConfig.plugins = {};
+
+        for (const pluginName of Object.keys(eslintrcConfig.plugins)) {
+
+            debug(`Translating plugin: ${pluginName}`);
+            debug(`Resolving plugin '${pluginName} relative to ${resolvePluginsRelativeTo}`);
+
+            const { original: plugin, error } = eslintrcConfig.plugins[pluginName];
+
+            if (error) {
+                throw error;
+            }
+
+            flatConfig.plugins[pluginName] = plugin;
+
+            // create a config for any processors
+            if (plugin.processors) {
+                for (const processorName of Object.keys(plugin.processors)) {
+                    if (processorName.startsWith(".")) {
+                        debug(`Assigning processor: ${pluginName}/${processorName}`);
+
+                        configs.unshift({
+                            files: [`**/*${processorName}`],
+                            processor: pluginProcessors.get(`${pluginName}/${processorName}`)
+                        });
+                    }
+
+                }
+            }
+        }
+    }
+
+    // translate env - must come after plugins
+    if (eslintrcConfig.env && typeof eslintrcConfig.env === "object") {
+        for (const envName of Object.keys(eslintrcConfig.env)) {
+
+            // only add environments that are true
+            if (eslintrcConfig.env[envName]) {
+                debug(`Translating environment: ${envName}`);
+
+                if (environments.has(envName)) {
+
+                    // built-in environments should be defined first
+                    configs.unshift(...translateESLintRC({
+                        criteria: eslintrcConfig.criteria,
+                        ...environments.get(envName)
+                    }, {
+                        resolveConfigRelativeTo,
+                        resolvePluginsRelativeTo
+                    }));
+                } else if (pluginEnvironments.has(envName)) {
+
+                    // if the environment comes from a plugin, it should come after the plugin config
+                    configs.push(...translateESLintRC({
+                        criteria: eslintrcConfig.criteria,
+                        ...pluginEnvironments.get(envName)
+                    }, {
+                        resolveConfigRelativeTo,
+                        resolvePluginsRelativeTo
+                    }));
+                }
+            }
+        }
+    }
+
+    // only add if there are actually keys in the config
+    if (Object.keys(flatConfig).length > 0) {
+        configs.push(flatConfig);
+    }
+
+    return configs;
+}
+
+
+//-----------------------------------------------------------------------------
+// Exports
+//-----------------------------------------------------------------------------
+
+/**
+ * A compatibility class for working with configs.
+ */
+class FlatCompat {
+
+    constructor({
+        baseDirectory = process.cwd(),
+        resolvePluginsRelativeTo = baseDirectory,
+        recommendedConfig,
+        allConfig
+    } = {}) {
+        this.baseDirectory = baseDirectory;
+        this.resolvePluginsRelativeTo = resolvePluginsRelativeTo;
+        this[cafactory] = new ConfigArrayFactory({
+            cwd: baseDirectory,
+            resolvePluginsRelativeTo,
+            getEslintAllConfig: () => {
+
+                if (!allConfig) {
+                    throw new TypeError("Missing parameter 'allConfig' in FlatCompat constructor.");
+                }
+
+                return allConfig;
+            },
+            getEslintRecommendedConfig: () => {
+
+                if (!recommendedConfig) {
+                    throw new TypeError("Missing parameter 'recommendedConfig' in FlatCompat constructor.");
+                }
+
+                return recommendedConfig;
+            }
+        });
+    }
+
+    /**
+     * Translates an ESLintRC-style config into a flag-config-style config.
+     * @param {Object} eslintrcConfig The ESLintRC-style config object.
+     * @returns {Object} A flag-config-style config object.
+     */
+    config(eslintrcConfig) {
+        const eslintrcArray = this[cafactory].create(eslintrcConfig, {
+            basePath: this.baseDirectory
+        });
+
+        const flatArray = [];
+        let hasIgnorePatterns = false;
+
+        eslintrcArray.forEach(configData => {
+            if (configData.type === "config") {
+                hasIgnorePatterns = hasIgnorePatterns || configData.ignorePattern;
+                flatArray.push(...translateESLintRC(configData, {
+                    resolveConfigRelativeTo: path.join(this.baseDirectory, "__placeholder.js"),
+                    resolvePluginsRelativeTo: path.join(this.resolvePluginsRelativeTo, "__placeholder.js"),
+                    pluginEnvironments: eslintrcArray.pluginEnvironments,
+                    pluginProcessors: eslintrcArray.pluginProcessors
+                }));
+            }
+        });
+
+        // combine ignorePatterns to emulate ESLintRC behavior better
+        if (hasIgnorePatterns) {
+            flatArray.unshift({
+                ignores: [filePath => {
+
+                    // Compute the final config for this file.
+                    // This filters config array elements by `files`/`excludedFiles` then merges the elements.
+                    const finalConfig = eslintrcArray.extractConfig(filePath);
+
+                    // Test the `ignorePattern` properties of the final config.
+                    return Boolean(finalConfig.ignores) && finalConfig.ignores(filePath);
+                }]
+            });
+        }
+
+        return flatArray;
+    }
+
+    /**
+     * Translates the `env` section of an ESLintRC-style config.
+     * @param {Object} envConfig The `env` section of an ESLintRC config.
+     * @returns {Object[]} An array of flag-config objects representing the environments.
+     */
+    env(envConfig) {
+        return this.config({
+            env: envConfig
+        });
+    }
+
+    /**
+     * Translates the `extends` section of an ESLintRC-style config.
+     * @param {...string} configsToExtend The names of the configs to load.
+     * @returns {Object[]} An array of flag-config objects representing the config.
+     */
+    extends(...configsToExtend) {
+        return this.config({
+            extends: configsToExtend
+        });
+    }
+
+    /**
+     * Translates the `plugins` section of an ESLintRC-style config.
+     * @param {...string} plugins The names of the plugins to load.
+     * @returns {Object[]} An array of flag-config objects representing the plugins.
+     */
+    plugins(...plugins) {
+        return this.config({
+            plugins
+        });
+    }
+}
+
+export { FlatCompat };

node_modules/@eslint/eslintrc/lib/index-universal.js

@@ -0,0 +1,29 @@
+/**
+ * @fileoverview Package exports for @eslint/eslintrc
+ * @author Nicholas C. Zakas
+ */
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import * as ConfigOps from "./shared/config-ops.js";
+import ConfigValidator from "./shared/config-validator.js";
+import * as naming from "./shared/naming.js";
+import environments from "../conf/environments.js";
+
+//-----------------------------------------------------------------------------
+// Exports
+//-----------------------------------------------------------------------------
+
+const Legacy = {
+    environments,
+
+    // shared
+    ConfigOps,
+    ConfigValidator,
+    naming
+};
+
+export {
+    Legacy
+};

node_modules/@eslint/eslintrc/lib/index.js

@@ -0,0 +1,56 @@
+/**
+ * @fileoverview Package exports for @eslint/eslintrc
+ * @author Nicholas C. Zakas
+ */
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import {
+    ConfigArrayFactory,
+    createContext as createConfigArrayFactoryContext
+} from "./config-array-factory.js";
+
+import { CascadingConfigArrayFactory } from "./cascading-config-array-factory.js";
+import * as ModuleResolver from "./shared/relative-module-resolver.js";
+import { ConfigArray, getUsedExtractedConfigs } from "./config-array/index.js";
+import { ConfigDependency } from "./config-array/config-dependency.js";
+import { ExtractedConfig } from "./config-array/extracted-config.js";
+import { IgnorePattern } from "./config-array/ignore-pattern.js";
+import { OverrideTester } from "./config-array/override-tester.js";
+import * as ConfigOps from "./shared/config-ops.js";
+import ConfigValidator from "./shared/config-validator.js";
+import * as naming from "./shared/naming.js";
+import { FlatCompat } from "./flat-compat.js";
+import environments from "../conf/environments.js";
+
+//-----------------------------------------------------------------------------
+// Exports
+//-----------------------------------------------------------------------------
+
+const Legacy = {
+    ConfigArray,
+    createConfigArrayFactoryContext,
+    CascadingConfigArrayFactory,
+    ConfigArrayFactory,
+    ConfigDependency,
+    ExtractedConfig,
+    IgnorePattern,
+    OverrideTester,
+    getUsedExtractedConfigs,
+    environments,
+
+    // shared
+    ConfigOps,
+    ConfigValidator,
+    ModuleResolver,
+    naming
+};
+
+export {
+
+    Legacy,
+
+    FlatCompat
+
+};

node_modules/@eslint/eslintrc/lib/shared/ajv.js

@@ -0,0 +1,191 @@
+/**
+ * @fileoverview The instance of Ajv validator.
+ * @author Evgeny Poberezkin
+ */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import Ajv from "ajv";
+
+//-----------------------------------------------------------------------------
+// Helpers
+//-----------------------------------------------------------------------------
+
+/*
+ * Copied from ajv/lib/refs/json-schema-draft-04.json
+ * The MIT License (MIT)
+ * Copyright (c) 2015-2017 Evgeny Poberezkin
+ */
+const metaSchema = {
+    id: "http://json-schema.org/draft-04/schema#",
+    $schema: "http://json-schema.org/draft-04/schema#",
+    description: "Core schema meta-schema",
+    definitions: {
+        schemaArray: {
+            type: "array",
+            minItems: 1,
+            items: { $ref: "#" }
+        },
+        positiveInteger: {
+            type: "integer",
+            minimum: 0
+        },
+        positiveIntegerDefault0: {
+            allOf: [{ $ref: "#/definitions/positiveInteger" }, { default: 0 }]
+        },
+        simpleTypes: {
+            enum: ["array", "boolean", "integer", "null", "number", "object", "string"]
+        },
+        stringArray: {
+            type: "array",
+            items: { type: "string" },
+            minItems: 1,
+            uniqueItems: true
+        }
+    },
+    type: "object",
+    properties: {
+        id: {
+            type: "string"
+        },
+        $schema: {
+            type: "string"
+        },
+        title: {
+            type: "string"
+        },
+        description: {
+            type: "string"
+        },
+        default: { },
+        multipleOf: {
+            type: "number",
+            minimum: 0,
+            exclusiveMinimum: true
+        },
+        maximum: {
+            type: "number"
+        },
+        exclusiveMaximum: {
+            type: "boolean",
+            default: false
+        },
+        minimum: {
+            type: "number"
+        },
+        exclusiveMinimum: {
+            type: "boolean",
+            default: false
+        },
+        maxLength: { $ref: "#/definitions/positiveInteger" },
+        minLength: { $ref: "#/definitions/positiveIntegerDefault0" },
+        pattern: {
+            type: "string",
+            format: "regex"
+        },
+        additionalItems: {
+            anyOf: [
+                { type: "boolean" },
+                { $ref: "#" }
+            ],
+            default: { }
+        },
+        items: {
+            anyOf: [
+                { $ref: "#" },
+                { $ref: "#/definitions/schemaArray" }
+            ],
+            default: { }
+        },
+        maxItems: { $ref: "#/definitions/positiveInteger" },
+        minItems: { $ref: "#/definitions/positiveIntegerDefault0" },
+        uniqueItems: {
+            type: "boolean",
+            default: false
+        },
+        maxProperties: { $ref: "#/definitions/positiveInteger" },
+        minProperties: { $ref: "#/definitions/positiveIntegerDefault0" },
+        required: { $ref: "#/definitions/stringArray" },
+        additionalProperties: {
+            anyOf: [
+                { type: "boolean" },
+                { $ref: "#" }
+            ],
+            default: { }
+        },
+        definitions: {
+            type: "object",
+            additionalProperties: { $ref: "#" },
+            default: { }
+        },
+        properties: {
+            type: "object",
+            additionalProperties: { $ref: "#" },
+            default: { }
+        },
+        patternProperties: {
+            type: "object",
+            additionalProperties: { $ref: "#" },
+            default: { }
+        },
+        dependencies: {
+            type: "object",
+            additionalProperties: {
+                anyOf: [
+                    { $ref: "#" },
+                    { $ref: "#/definitions/stringArray" }
+                ]
+            }
+        },
+        enum: {
+            type: "array",
+            minItems: 1,
+            uniqueItems: true
+        },
+        type: {
+            anyOf: [
+                { $ref: "#/definitions/simpleTypes" },
+                {
+                    type: "array",
+                    items: { $ref: "#/definitions/simpleTypes" },
+                    minItems: 1,
+                    uniqueItems: true
+                }
+            ]
+        },
+        format: { type: "string" },
+        allOf: { $ref: "#/definitions/schemaArray" },
+        anyOf: { $ref: "#/definitions/schemaArray" },
+        oneOf: { $ref: "#/definitions/schemaArray" },
+        not: { $ref: "#" }
+    },
+    dependencies: {
+        exclusiveMaximum: ["maximum"],
+        exclusiveMinimum: ["minimum"]
+    },
+    default: { }
+};
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+export default (additionalOptions = {}) => {
+    const ajv = new Ajv({
+        meta: false,
+        useDefaults: true,
+        validateSchema: false,
+        missingRefs: "ignore",
+        verbose: true,
+        schemaId: "auto",
+        ...additionalOptions
+    });
+
+    ajv.addMetaSchema(metaSchema);
+    // eslint-disable-next-line no-underscore-dangle
+    ajv._opts.defaultMeta = metaSchema.id;
+
+    return ajv;
+};

node_modules/@eslint/eslintrc/lib/shared/config-ops.js

@@ -0,0 +1,135 @@
+/**
+ * @fileoverview Config file operations. This file must be usable in the browser,
+ * so no Node-specific code can be here.
+ * @author Nicholas C. Zakas
+ */
+
+//------------------------------------------------------------------------------
+// Private
+//------------------------------------------------------------------------------
+
+const RULE_SEVERITY_STRINGS = ["off", "warn", "error"],
+    RULE_SEVERITY = RULE_SEVERITY_STRINGS.reduce((map, value, index) => {
+        map[value] = index;
+        return map;
+    }, {}),
+    VALID_SEVERITIES = [0, 1, 2, "off", "warn", "error"];
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/**
+ * Normalizes the severity value of a rule's configuration to a number
+ * @param {(number|string|[number, ...*]|[string, ...*])} ruleConfig A rule's configuration value, generally
+ * received from the user. A valid config value is either 0, 1, 2, the string "off" (treated the same as 0),
+ * the string "warn" (treated the same as 1), the string "error" (treated the same as 2), or an array
+ * whose first element is one of the above values. Strings are matched case-insensitively.
+ * @returns {(0|1|2)} The numeric severity value if the config value was valid, otherwise 0.
+ */
+function getRuleSeverity(ruleConfig) {
+    const severityValue = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
+
+    if (severityValue === 0 || severityValue === 1 || severityValue === 2) {
+        return severityValue;
+    }
+
+    if (typeof severityValue === "string") {
+        return RULE_SEVERITY[severityValue.toLowerCase()] || 0;
+    }
+
+    return 0;
+}
+
+/**
+ * Converts old-style severity settings (0, 1, 2) into new-style
+ * severity settings (off, warn, error) for all rules. Assumption is that severity
+ * values have already been validated as correct.
+ * @param {Object} config The config object to normalize.
+ * @returns {void}
+ */
+function normalizeToStrings(config) {
+
+    if (config.rules) {
+        Object.keys(config.rules).forEach(ruleId => {
+            const ruleConfig = config.rules[ruleId];
+
+            if (typeof ruleConfig === "number") {
+                config.rules[ruleId] = RULE_SEVERITY_STRINGS[ruleConfig] || RULE_SEVERITY_STRINGS[0];
+            } else if (Array.isArray(ruleConfig) && typeof ruleConfig[0] === "number") {
+                ruleConfig[0] = RULE_SEVERITY_STRINGS[ruleConfig[0]] || RULE_SEVERITY_STRINGS[0];
+            }
+        });
+    }
+}
+
+/**
+ * Determines if the severity for the given rule configuration represents an error.
+ * @param {int|string|Array} ruleConfig The configuration for an individual rule.
+ * @returns {boolean} True if the rule represents an error, false if not.
+ */
+function isErrorSeverity(ruleConfig) {
+    return getRuleSeverity(ruleConfig) === 2;
+}
+
+/**
+ * Checks whether a given config has valid severity or not.
+ * @param {number|string|Array} ruleConfig The configuration for an individual rule.
+ * @returns {boolean} `true` if the configuration has valid severity.
+ */
+function isValidSeverity(ruleConfig) {
+    let severity = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
+
+    if (typeof severity === "string") {
+        severity = severity.toLowerCase();
+    }
+    return VALID_SEVERITIES.indexOf(severity) !== -1;
+}
+
+/**
+ * Checks whether every rule of a given config has valid severity or not.
+ * @param {Object} config The configuration for rules.
+ * @returns {boolean} `true` if the configuration has valid severity.
+ */
+function isEverySeverityValid(config) {
+    return Object.keys(config).every(ruleId => isValidSeverity(config[ruleId]));
+}
+
+/**
+ * Normalizes a value for a global in a config
+ * @param {(boolean|string|null)} configuredValue The value given for a global in configuration or in
+ * a global directive comment
+ * @returns {("readable"|"writeable"|"off")} The value normalized as a string
+ * @throws Error if global value is invalid
+ */
+function normalizeConfigGlobal(configuredValue) {
+    switch (configuredValue) {
+        case "off":
+            return "off";
+
+        case true:
+        case "true":
+        case "writeable":
+        case "writable":
+            return "writable";
+
+        case null:
+        case false:
+        case "false":
+        case "readable":
+        case "readonly":
+            return "readonly";
+
+        default:
+            throw new Error(`'${configuredValue}' is not a valid configuration for a global (use 'readonly', 'writable', or 'off')`);
+    }
+}
+
+export {
+    getRuleSeverity,
+    normalizeToStrings,
+    isErrorSeverity,
+    isValidSeverity,
+    isEverySeverityValid,
+    normalizeConfigGlobal
+};

node_modules/@eslint/eslintrc/lib/shared/config-validator.js

@@ -0,0 +1,370 @@
+/**
+ * @fileoverview Validates configs.
+ * @author Brandon Mills
+ */
+
+/* eslint class-methods-use-this: "off" */
+
+//------------------------------------------------------------------------------
+// Typedefs
+//------------------------------------------------------------------------------
+
+/** @typedef {import("../shared/types").Rule} Rule */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import util from "util";
+import * as ConfigOps from "./config-ops.js";
+import { emitDeprecationWarning } from "./deprecation-warnings.js";
+import ajvOrig from "./ajv.js";
+import configSchema from "../../conf/config-schema.js";
+import BuiltInEnvironments from "../../conf/environments.js";
+
+const ajv = ajvOrig();
+
+const ruleValidators = new WeakMap();
+const noop = Function.prototype;
+
+//------------------------------------------------------------------------------
+// Private
+//------------------------------------------------------------------------------
+let validateSchema;
+const severityMap = {
+    error: 2,
+    warn: 1,
+    off: 0
+};
+
+const validated = new WeakSet();
+
+// JSON schema that disallows passing any options
+const noOptionsSchema = Object.freeze({
+    type: "array",
+    minItems: 0,
+    maxItems: 0
+});
+
+//-----------------------------------------------------------------------------
+// Exports
+//-----------------------------------------------------------------------------
+
+export default class ConfigValidator {
+    constructor({ builtInRules = new Map() } = {}) {
+        this.builtInRules = builtInRules;
+    }
+
+    /**
+     * Gets a complete options schema for a rule.
+     * @param {Rule} rule A rule object
+     * @throws {TypeError} If `meta.schema` is specified but is not an array, object or `false`.
+     * @returns {Object|null} JSON Schema for the rule's options.
+     *      `null` if rule wasn't passed or its `meta.schema` is `false`.
+     */
+    getRuleOptionsSchema(rule) {
+        if (!rule) {
+            return null;
+        }
+
+        if (!rule.meta) {
+            return { ...noOptionsSchema }; // default if `meta.schema` is not specified
+        }
+
+        const schema = rule.meta.schema;
+
+        if (typeof schema === "undefined") {
+            return { ...noOptionsSchema }; // default if `meta.schema` is not specified
+        }
+
+        // `schema:false` is an allowed explicit opt-out of options validation for the rule
+        if (schema === false) {
+            return null;
+        }
+
+        if (typeof schema !== "object" || schema === null) {
+            throw new TypeError("Rule's `meta.schema` must be an array or object");
+        }
+
+        // ESLint-specific array form needs to be converted into a valid JSON Schema definition
+        if (Array.isArray(schema)) {
+            if (schema.length) {
+                return {
+                    type: "array",
+                    items: schema,
+                    minItems: 0,
+                    maxItems: schema.length
+                };
+            }
+
+            // `schema:[]` is an explicit way to specify that the rule does not accept any options
+            return { ...noOptionsSchema };
+        }
+
+        // `schema:<object>` is assumed to be a valid JSON Schema definition
+        return schema;
+    }
+
+    /**
+     * Validates a rule's severity and returns the severity value. Throws an error if the severity is invalid.
+     * @param {options} options The given options for the rule.
+     * @returns {number|string} The rule's severity value
+     */
+    validateRuleSeverity(options) {
+        const severity = Array.isArray(options) ? options[0] : options;
+        const normSeverity = typeof severity === "string" ? severityMap[severity.toLowerCase()] : severity;
+
+        if (normSeverity === 0 || normSeverity === 1 || normSeverity === 2) {
+            return normSeverity;
+        }
+
+        throw new Error(`\tSeverity should be one of the following: 0 = off, 1 = warn, 2 = error (you passed '${util.inspect(severity).replace(/'/gu, "\"").replace(/\n/gu, "")}').\n`);
+
+    }
+
+    /**
+     * Validates the non-severity options passed to a rule, based on its schema.
+     * @param {{create: Function}} rule The rule to validate
+     * @param {Array} localOptions The options for the rule, excluding severity
+     * @returns {void}
+     */
+    validateRuleSchema(rule, localOptions) {
+        if (!ruleValidators.has(rule)) {
+            try {
+                const schema = this.getRuleOptionsSchema(rule);
+
+                if (schema) {
+                    ruleValidators.set(rule, ajv.compile(schema));
+                }
+            } catch (err) {
+                const errorWithCode = new Error(err.message, { cause: err });
+
+                errorWithCode.code = "ESLINT_INVALID_RULE_OPTIONS_SCHEMA";
+
+                throw errorWithCode;
+            }
+        }
+
+        const validateRule = ruleValidators.get(rule);
+
+        if (validateRule) {
+            validateRule(localOptions);
+            if (validateRule.errors) {
+                throw new Error(validateRule.errors.map(
+                    error => `\tValue ${JSON.stringify(error.data)} ${error.message}.\n`
+                ).join(""));
+            }
+        }
+    }
+
+    /**
+     * Validates a rule's options against its schema.
+     * @param {{create: Function}|null} rule The rule that the config is being validated for
+     * @param {string} ruleId The rule's unique name.
+     * @param {Array|number} options The given options for the rule.
+     * @param {string|null} source The name of the configuration source to report in any errors. If null or undefined,
+     * no source is prepended to the message.
+     * @returns {void}
+     */
+    validateRuleOptions(rule, ruleId, options, source = null) {
+        try {
+            const severity = this.validateRuleSeverity(options);
+
+            if (severity !== 0) {
+                this.validateRuleSchema(rule, Array.isArray(options) ? options.slice(1) : []);
+            }
+        } catch (err) {
+            let enhancedMessage = err.code === "ESLINT_INVALID_RULE_OPTIONS_SCHEMA"
+                ? `Error while processing options validation schema of rule '${ruleId}': ${err.message}`
+                : `Configuration for rule "${ruleId}" is invalid:\n${err.message}`;
+
+            if (typeof source === "string") {
+                enhancedMessage = `${source}:\n\t${enhancedMessage}`;
+            }
+
+            const enhancedError = new Error(enhancedMessage, { cause: err });
+
+            if (err.code) {
+                enhancedError.code = err.code;
+            }
+
+            throw enhancedError;
+        }
+    }
+
+    /**
+     * Validates an environment object
+     * @param {Object} environment The environment config object to validate.
+     * @param {string} source The name of the configuration source to report in any errors.
+     * @param {function(envId:string): Object} [getAdditionalEnv] A map from strings to loaded environments.
+     * @returns {void}
+     */
+    validateEnvironment(
+        environment,
+        source,
+        getAdditionalEnv = noop
+    ) {
+
+        // not having an environment is ok
+        if (!environment) {
+            return;
+        }
+
+        Object.keys(environment).forEach(id => {
+            const env = getAdditionalEnv(id) || BuiltInEnvironments.get(id) || null;
+
+            if (!env) {
+                const message = `${source}:\n\tEnvironment key "${id}" is unknown\n`;
+
+                throw new Error(message);
+            }
+        });
+    }
+
+    /**
+     * Validates a rules config object
+     * @param {Object} rulesConfig The rules config object to validate.
+     * @param {string} source The name of the configuration source to report in any errors.
+     * @param {function(ruleId:string): Object} getAdditionalRule A map from strings to loaded rules
+     * @returns {void}
+     */
+    validateRules(
+        rulesConfig,
+        source,
+        getAdditionalRule = noop
+    ) {
+        if (!rulesConfig) {
+            return;
+        }
+
+        Object.keys(rulesConfig).forEach(id => {
+            const rule = getAdditionalRule(id) || this.builtInRules.get(id) || null;
+
+            this.validateRuleOptions(rule, id, rulesConfig[id], source);
+        });
+    }
+
+    /**
+     * Validates a `globals` section of a config file
+     * @param {Object} globalsConfig The `globals` section
+     * @param {string|null} source The name of the configuration source to report in the event of an error.
+     * @returns {void}
+     */
+    validateGlobals(globalsConfig, source = null) {
+        if (!globalsConfig) {
+            return;
+        }
+
+        Object.entries(globalsConfig)
+            .forEach(([configuredGlobal, configuredValue]) => {
+                try {
+                    ConfigOps.normalizeConfigGlobal(configuredValue);
+                } catch (err) {
+                    throw new Error(`ESLint configuration of global '${configuredGlobal}' in ${source} is invalid:\n${err.message}`);
+                }
+            });
+    }
+
+    /**
+     * Validate `processor` configuration.
+     * @param {string|undefined} processorName The processor name.
+     * @param {string} source The name of config file.
+     * @param {function(id:string): Processor} getProcessor The getter of defined processors.
+     * @returns {void}
+     */
+    validateProcessor(processorName, source, getProcessor) {
+        if (processorName && !getProcessor(processorName)) {
+            throw new Error(`ESLint configuration of processor in '${source}' is invalid: '${processorName}' was not found.`);
+        }
+    }
+
+    /**
+     * Formats an array of schema validation errors.
+     * @param {Array} errors An array of error messages to format.
+     * @returns {string} Formatted error message
+     */
+    formatErrors(errors) {
+        return errors.map(error => {
+            if (error.keyword === "additionalProperties") {
+                const formattedPropertyPath = error.dataPath.length ? `${error.dataPath.slice(1)}.${error.params.additionalProperty}` : error.params.additionalProperty;
+
+                return `Unexpected top-level property "${formattedPropertyPath}"`;
+            }
+            if (error.keyword === "type") {
+                const formattedField = error.dataPath.slice(1);
+                const formattedExpectedType = Array.isArray(error.schema) ? error.schema.join("/") : error.schema;
+                const formattedValue = JSON.stringify(error.data);
+
+                return `Property "${formattedField}" is the wrong type (expected ${formattedExpectedType} but got \`${formattedValue}\`)`;
+            }
+
+            const field = error.dataPath[0] === "." ? error.dataPath.slice(1) : error.dataPath;
+
+            return `"${field}" ${error.message}. Value: ${JSON.stringify(error.data)}`;
+        }).map(message => `\t- ${message}.\n`).join("");
+    }
+
+    /**
+     * Validates the top level properties of the config object.
+     * @param {Object} config The config object to validate.
+     * @param {string} source The name of the configuration source to report in any errors.
+     * @returns {void}
+     */
+    validateConfigSchema(config, source = null) {
+        validateSchema = validateSchema || ajv.compile(configSchema);
+
+        if (!validateSchema(config)) {
+            throw new Error(`ESLint configuration in ${source} is invalid:\n${this.formatErrors(validateSchema.errors)}`);
+        }
+
+        if (Object.hasOwnProperty.call(config, "ecmaFeatures")) {
+            emitDeprecationWarning(source, "ESLINT_LEGACY_ECMAFEATURES");
+        }
+    }
+
+    /**
+     * Validates an entire config object.
+     * @param {Object} config The config object to validate.
+     * @param {string} source The name of the configuration source to report in any errors.
+     * @param {function(ruleId:string): Object} [getAdditionalRule] A map from strings to loaded rules.
+     * @param {function(envId:string): Object} [getAdditionalEnv] A map from strings to loaded envs.
+     * @returns {void}
+     */
+    validate(config, source, getAdditionalRule, getAdditionalEnv) {
+        this.validateConfigSchema(config, source);
+        this.validateRules(config.rules, source, getAdditionalRule);
+        this.validateEnvironment(config.env, source, getAdditionalEnv);
+        this.validateGlobals(config.globals, source);
+
+        for (const override of config.overrides || []) {
+            this.validateRules(override.rules, source, getAdditionalRule);
+            this.validateEnvironment(override.env, source, getAdditionalEnv);
+            this.validateGlobals(config.globals, source);
+        }
+    }
+
+    /**
+     * Validate config array object.
+     * @param {ConfigArray} configArray The config array to validate.
+     * @returns {void}
+     */
+    validateConfigArray(configArray) {
+        const getPluginEnv = Map.prototype.get.bind(configArray.pluginEnvironments);
+        const getPluginProcessor = Map.prototype.get.bind(configArray.pluginProcessors);
+        const getPluginRule = Map.prototype.get.bind(configArray.pluginRules);
+
+        // Validate.
+        for (const element of configArray) {
+            if (validated.has(element)) {
+                continue;
+            }
+            validated.add(element);
+
+            this.validateEnvironment(element.env, element.name, getPluginEnv);
+            this.validateGlobals(element.globals, element.name);
+            this.validateProcessor(element.processor, element.name, getPluginProcessor);
+            this.validateRules(element.rules, element.name, getPluginRule);
+        }
+    }
+
+}

node_modules/@eslint/eslintrc/lib/shared/deprecation-warnings.js

@@ -0,0 +1,63 @@
+/**
+ * @fileoverview Provide the function that emits deprecation warnings.
+ * @author Toru Nagashima <http://github.com/mysticatea>
+ */
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+import path from "path";
+
+//------------------------------------------------------------------------------
+// Private
+//------------------------------------------------------------------------------
+
+// Defitions for deprecation warnings.
+const deprecationWarningMessages = {
+    ESLINT_LEGACY_ECMAFEATURES:
+        "The 'ecmaFeatures' config file property is deprecated and has no effect.",
+    ESLINT_PERSONAL_CONFIG_LOAD:
+        "'~/.eslintrc.*' config files have been deprecated. " +
+        "Please use a config file per project or the '--config' option.",
+    ESLINT_PERSONAL_CONFIG_SUPPRESS:
+        "'~/.eslintrc.*' config files have been deprecated. " +
+        "Please remove it or add 'root:true' to the config files in your " +
+        "projects in order to avoid loading '~/.eslintrc.*' accidentally."
+};
+
+const sourceFileErrorCache = new Set();
+
+/**
+ * Emits a deprecation warning containing a given filepath. A new deprecation warning is emitted
+ * for each unique file path, but repeated invocations with the same file path have no effect.
+ * No warnings are emitted if the `--no-deprecation` or `--no-warnings` Node runtime flags are active.
+ * @param {string} source The name of the configuration source to report the warning for.
+ * @param {string} errorCode The warning message to show.
+ * @returns {void}
+ */
+function emitDeprecationWarning(source, errorCode) {
+    const cacheKey = JSON.stringify({ source, errorCode });
+
+    if (sourceFileErrorCache.has(cacheKey)) {
+        return;
+    }
+    sourceFileErrorCache.add(cacheKey);
+
+    const rel = path.relative(process.cwd(), source);
+    const message = deprecationWarningMessages[errorCode];
+
+    process.emitWarning(
+        `${message} (found in "${rel}")`,
+        "DeprecationWarning",
+        errorCode
+    );
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+export {
+    emitDeprecationWarning
+};

node_modules/@eslint/eslintrc/lib/shared/naming.js

@@ -0,0 +1,96 @@
+/**
+ * @fileoverview Common helpers for naming of plugins, formatters and configs
+ */
+
+const NAMESPACE_REGEX = /^@.*\//iu;
+
+/**
+ * Brings package name to correct format based on prefix
+ * @param {string} name The name of the package.
+ * @param {string} prefix Can be either "eslint-plugin", "eslint-config" or "eslint-formatter"
+ * @returns {string} Normalized name of the package
+ * @private
+ */
+function normalizePackageName(name, prefix) {
+    let normalizedName = name;
+
+    /**
+     * On Windows, name can come in with Windows slashes instead of Unix slashes.
+     * Normalize to Unix first to avoid errors later on.
+     * https://github.com/eslint/eslint/issues/5644
+     */
+    if (normalizedName.includes("\\")) {
+        normalizedName = normalizedName.replace(/\\/gu, "/");
+    }
+
+    if (normalizedName.charAt(0) === "@") {
+
+        /**
+         * it's a scoped package
+         * package name is the prefix, or just a username
+         */
+        const scopedPackageShortcutRegex = new RegExp(`^(@[^/]+)(?:/(?:${prefix})?)?$`, "u"),
+            scopedPackageNameRegex = new RegExp(`^${prefix}(-|$)`, "u");
+
+        if (scopedPackageShortcutRegex.test(normalizedName)) {
+            normalizedName = normalizedName.replace(scopedPackageShortcutRegex, `$1/${prefix}`);
+        } else if (!scopedPackageNameRegex.test(normalizedName.split("/")[1])) {
+
+            /**
+             * for scoped packages, insert the prefix after the first / unless
+             * the path is already @scope/eslint or @scope/eslint-xxx-yyy
+             */
+            normalizedName = normalizedName.replace(/^@([^/]+)\/(.*)$/u, `@$1/${prefix}-$2`);
+        }
+    } else if (!normalizedName.startsWith(`${prefix}-`)) {
+        normalizedName = `${prefix}-${normalizedName}`;
+    }
+
+    return normalizedName;
+}
+
+/**
+ * Removes the prefix from a fullname.
+ * @param {string} fullname The term which may have the prefix.
+ * @param {string} prefix The prefix to remove.
+ * @returns {string} The term without prefix.
+ */
+function getShorthandName(fullname, prefix) {
+    if (fullname[0] === "@") {
+        let matchResult = new RegExp(`^(@[^/]+)/${prefix}$`, "u").exec(fullname);
+
+        if (matchResult) {
+            return matchResult[1];
+        }
+
+        matchResult = new RegExp(`^(@[^/]+)/${prefix}-(.+)$`, "u").exec(fullname);
+        if (matchResult) {
+            return `${matchResult[1]}/${matchResult[2]}`;
+        }
+    } else if (fullname.startsWith(`${prefix}-`)) {
+        return fullname.slice(prefix.length + 1);
+    }
+
+    return fullname;
+}
+
+/**
+ * Gets the scope (namespace) of a term.
+ * @param {string} term The term which may have the namespace.
+ * @returns {string} The namespace of the term if it has one.
+ */
+function getNamespaceFromTerm(term) {
+    const match = term.match(NAMESPACE_REGEX);
+
+    return match ? match[0] : "";
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+export {
+    normalizePackageName,
+    getShorthandName,
+    getNamespaceFromTerm
+};

node_modules/@eslint/eslintrc/lib/shared/relative-module-resolver.js

@@ -0,0 +1,42 @@
+/**
+ * Utility for resolving a module relative to another module
+ * @author Teddy Katz
+ */
+
+import Module from "module";
+
+/*
+ * `Module.createRequire` is added in v12.2.0. It supports URL as well.
+ * We only support the case where the argument is a filepath, not a URL.
+ */
+const createRequire = Module.createRequire;
+
+/**
+ * Resolves a Node module relative to another module
+ * @param {string} moduleName The name of a Node module, or a path to a Node module.
+ * @param {string} relativeToPath An absolute path indicating the module that `moduleName` should be resolved relative to. This must be
+ * a file rather than a directory, but the file need not actually exist.
+ * @returns {string} The absolute path that would result from calling `require.resolve(moduleName)` in a file located at `relativeToPath`
+ */
+function resolve(moduleName, relativeToPath) {
+    try {
+        return createRequire(relativeToPath).resolve(moduleName);
+    } catch (error) {
+
+        // This `if` block is for older Node.js than 12.0.0. We can remove this block in the future.
+        if (
+            typeof error === "object" &&
+            error !== null &&
+            error.code === "MODULE_NOT_FOUND" &&
+            !error.requireStack &&
+            error.message.includes(moduleName)
+        ) {
+            error.message += `\nRequire stack:\n- ${relativeToPath}`;
+        }
+        throw error;
+    }
+}
+
+export {
+    resolve
+};

node_modules/@eslint/eslintrc/lib/shared/types.js

@@ -0,0 +1,149 @@
+/**
+ * @fileoverview Define common types for input completion.
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+
+/** @type {any} */
+export default {};
+
+/** @typedef {boolean | "off" | "readable" | "readonly" | "writable" | "writeable"} GlobalConf */
+/** @typedef {0 | 1 | 2 | "off" | "warn" | "error"} SeverityConf */
+/** @typedef {SeverityConf | [SeverityConf, ...any[]]} RuleConf */
+
+/**
+ * @typedef {Object} EcmaFeatures
+ * @property {boolean} [globalReturn] Enabling `return` statements at the top-level.
+ * @property {boolean} [jsx] Enabling JSX syntax.
+ * @property {boolean} [impliedStrict] Enabling strict mode always.
+ */
+
+/**
+ * @typedef {Object} ParserOptions
+ * @property {EcmaFeatures} [ecmaFeatures] The optional features.
+ * @property {3|5|6|7|8|9|10|11|12|2015|2016|2017|2018|2019|2020|2021} [ecmaVersion] The ECMAScript version (or revision number).
+ * @property {"script"|"module"} [sourceType] The source code type.
+ */
+
+/**
+ * @typedef {Object} ConfigData
+ * @property {Record<string, boolean>} [env] The environment settings.
+ * @property {string | string[]} [extends] The path to other config files or the package name of shareable configs.
+ * @property {Record<string, GlobalConf>} [globals] The global variable settings.
+ * @property {string | string[]} [ignorePatterns] The glob patterns that ignore to lint.
+ * @property {boolean} [noInlineConfig] The flag that disables directive comments.
+ * @property {OverrideConfigData[]} [overrides] The override settings per kind of files.
+ * @property {string} [parser] The path to a parser or the package name of a parser.
+ * @property {ParserOptions} [parserOptions] The parser options.
+ * @property {string[]} [plugins] The plugin specifiers.
+ * @property {string} [processor] The processor specifier.
+ * @property {boolean} [reportUnusedDisableDirectives] The flag to report unused `eslint-disable` comments.
+ * @property {boolean} [root] The root flag.
+ * @property {Record<string, RuleConf>} [rules] The rule settings.
+ * @property {Object} [settings] The shared settings.
+ */
+
+/**
+ * @typedef {Object} OverrideConfigData
+ * @property {Record<string, boolean>} [env] The environment settings.
+ * @property {string | string[]} [excludedFiles] The glob pattarns for excluded files.
+ * @property {string | string[]} [extends] The path to other config files or the package name of shareable configs.
+ * @property {string | string[]} files The glob patterns for target files.
+ * @property {Record<string, GlobalConf>} [globals] The global variable settings.
+ * @property {boolean} [noInlineConfig] The flag that disables directive comments.
+ * @property {OverrideConfigData[]} [overrides] The override settings per kind of files.
+ * @property {string} [parser] The path to a parser or the package name of a parser.
+ * @property {ParserOptions} [parserOptions] The parser options.
+ * @property {string[]} [plugins] The plugin specifiers.
+ * @property {string} [processor] The processor specifier.
+ * @property {boolean} [reportUnusedDisableDirectives] The flag to report unused `eslint-disable` comments.
+ * @property {Record<string, RuleConf>} [rules] The rule settings.
+ * @property {Object} [settings] The shared settings.
+ */
+
+/**
+ * @typedef {Object} ParseResult
+ * @property {Object} ast The AST.
+ * @property {ScopeManager} [scopeManager] The scope manager of the AST.
+ * @property {Record<string, any>} [services] The services that the parser provides.
+ * @property {Record<string, string[]>} [visitorKeys] The visitor keys of the AST.
+ */
+
+/**
+ * @typedef {Object} Parser
+ * @property {(text:string, options:ParserOptions) => Object} parse The definition of global variables.
+ * @property {(text:string, options:ParserOptions) => ParseResult} [parseForESLint] The parser options that will be enabled under this environment.
+ */
+
+/**
+ * @typedef {Object} Environment
+ * @property {Record<string, GlobalConf>} [globals] The definition of global variables.
+ * @property {ParserOptions} [parserOptions] The parser options that will be enabled under this environment.
+ */
+
+/**
+ * @typedef {Object} LintMessage
+ * @property {number} column The 1-based column number.
+ * @property {number} [endColumn] The 1-based column number of the end location.
+ * @property {number} [endLine] The 1-based line number of the end location.
+ * @property {boolean} fatal If `true` then this is a fatal error.
+ * @property {{range:[number,number], text:string}} [fix] Information for autofix.
+ * @property {number} line The 1-based line number.
+ * @property {string} message The error message.
+ * @property {string|null} ruleId The ID of the rule which makes this message.
+ * @property {0|1|2} severity The severity of this message.
+ * @property {Array<{desc?: string, messageId?: string, fix: {range: [number, number], text: string}}>} [suggestions] Information for suggestions.
+ */
+
+/**
+ * @typedef {Object} SuggestionResult
+ * @property {string} desc A short description.
+ * @property {string} [messageId] Id referencing a message for the description.
+ * @property {{ text: string, range: number[] }} fix fix result info
+ */
+
+/**
+ * @typedef {Object} Processor
+ * @property {(text:string, filename:string) => Array<string | { text:string, filename:string }>} [preprocess] The function to extract code blocks.
+ * @property {(messagesList:LintMessage[][], filename:string) => LintMessage[]} [postprocess] The function to merge messages.
+ * @property {boolean} [supportsAutofix] If `true` then it means the processor supports autofix.
+ */
+
+/**
+ * @typedef {Object} RuleMetaDocs
+ * @property {string} category The category of the rule.
+ * @property {string} description The description of the rule.
+ * @property {boolean} recommended If `true` then the rule is included in `eslint:recommended` preset.
+ * @property {string} url The URL of the rule documentation.
+ */
+
+/**
+ * @typedef {Object} RuleMeta
+ * @property {boolean} [deprecated] If `true` then the rule has been deprecated.
+ * @property {RuleMetaDocs} docs The document information of the rule.
+ * @property {"code"|"whitespace"} [fixable] The autofix type.
+ * @property {Record<string,string>} [messages] The messages the rule reports.
+ * @property {string[]} [replacedBy] The IDs of the alternative rules.
+ * @property {Array|Object} schema The option schema of the rule.
+ * @property {"problem"|"suggestion"|"layout"} type The rule type.
+ */
+
+/**
+ * @typedef {Object} Rule
+ * @property {Function} create The factory of the rule.
+ * @property {RuleMeta} meta The meta data of the rule.
+ */
+
+/**
+ * @typedef {Object} Plugin
+ * @property {Record<string, ConfigData>} [configs] The definition of plugin configs.
+ * @property {Record<string, Environment>} [environments] The definition of plugin environments.
+ * @property {Record<string, Processor>} [processors] The definition of plugin processors.
+ * @property {Record<string, Function | Rule>} [rules] The definition of plugin rules.
+ */
+
+/**
+ * Information of deprecated rules.
+ * @typedef {Object} DeprecatedRuleInfo
+ * @property {string} ruleId The rule ID.
+ * @property {string[]} replacedBy The rule IDs that replace this deprecated rule.
+ */

node_modules/@eslint/eslintrc/node_modules/ajv/.tonic_example.js

@@ -0,0 +1,20 @@
+var Ajv = require('ajv');
+var ajv = new Ajv({allErrors: true});
+
+var schema = {
+  "properties": {
+    "foo": { "type": "string" },
+    "bar": { "type": "number", "maximum": 3 }
+  }
+};
+
+var validate = ajv.compile(schema);
+
+test({"foo": "abc", "bar": 2});
+test({"foo": 2, "bar": 4});
+
+function test(data) {
+  var valid = validate(data);
+  if (valid) console.log('Valid!');
+  else console.log('Invalid: ' + ajv.errorsText(validate.errors));
+}

node_modules/@eslint/eslintrc/node_modules/ajv/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2017 Evgeny Poberezkin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

node_modules/@eslint/eslintrc/node_modules/ajv/lib/ajv.d.ts

@@ -0,0 +1,397 @@
+declare var ajv: {
+  (options?: ajv.Options): ajv.Ajv;
+  new(options?: ajv.Options): ajv.Ajv;
+  ValidationError: typeof AjvErrors.ValidationError;
+  MissingRefError: typeof AjvErrors.MissingRefError;
+  $dataMetaSchema: object;
+}
+
+declare namespace AjvErrors {
+  class ValidationError extends Error {
+    constructor(errors: Array<ajv.ErrorObject>);
+
+    message: string;
+    errors: Array<ajv.ErrorObject>;
+    ajv: true;
+    validation: true;
+  }
+
+  class MissingRefError extends Error {
+    constructor(baseId: string, ref: string, message?: string);
+    static message: (baseId: string, ref: string) => string;
+
+    message: string;
+    missingRef: string;
+    missingSchema: string;
+  }
+}
+
+declare namespace ajv {
+  type ValidationError = AjvErrors.ValidationError;
+
+  type MissingRefError = AjvErrors.MissingRefError;
+
+  interface Ajv {
+    /**
+    * Validate data using schema
+    * Schema will be compiled and cached (using serialized JSON as key, [fast-json-stable-stringify](https://github.com/epoberezkin/fast-json-stable-stringify) is used to serialize by default).
+    * @param  {string|object|Boolean} schemaKeyRef key, ref or schema object
+    * @param  {Any} data to be validated
+    * @return {Boolean} validation result. Errors from the last validation will be available in `ajv.errors` (and also in compiled schema: `schema.errors`).
+    */
+    validate(schemaKeyRef: object | string | boolean, data: any): boolean | PromiseLike<any>;
+    /**
+    * Create validating function for passed schema.
+    * @param  {object|Boolean} schema schema object
+    * @return {Function} validating function
+    */
+    compile(schema: object | boolean): ValidateFunction;
+    /**
+    * Creates validating function for passed schema with asynchronous loading of missing schemas.
+    * `loadSchema` option should be a function that accepts schema uri and node-style callback.
+    * @this  Ajv
+    * @param {object|Boolean} schema schema object
+    * @param {Boolean} meta optional true to compile meta-schema; this parameter can be skipped
+    * @param {Function} callback optional node-style callback, it is always called with 2 parameters: error (or null) and validating function.
+    * @return {PromiseLike<ValidateFunction>} validating function
+    */
+    compileAsync(schema: object | boolean, meta?: Boolean, callback?: (err: Error, validate: ValidateFunction) => any): PromiseLike<ValidateFunction>;
+    /**
+    * Adds schema to the instance.
+    * @param {object|Array} schema schema or array of schemas. If array is passed, `key` and other parameters will be ignored.
+    * @param {string} key Optional schema key. Can be passed to `validate` method instead of schema object or id/ref. One schema per instance can have empty `id` and `key`.
+    * @return {Ajv} this for method chaining
+    */
+    addSchema(schema: Array<object> | object, key?: string): Ajv;
+    /**
+    * Add schema that will be used to validate other schemas
+    * options in META_IGNORE_OPTIONS are alway set to false
+    * @param {object} schema schema object
+    * @param {string} key optional schema key
+    * @return {Ajv} this for method chaining
+    */
+    addMetaSchema(schema: object, key?: string): Ajv;
+    /**
+    * Validate schema
+    * @param {object|Boolean} schema schema to validate
+    * @return {Boolean} true if schema is valid
+    */
+    validateSchema(schema: object | boolean): boolean;
+    /**
+    * Get compiled schema from the instance by `key` or `ref`.
+    * @param  {string} keyRef `key` that was passed to `addSchema` or full schema reference (`schema.id` or resolved id).
+    * @return {Function} schema validating function (with property `schema`). Returns undefined if keyRef can't be resolved to an existing schema.
+    */
+    getSchema(keyRef: string): ValidateFunction | undefined;
+    /**
+    * Remove cached schema(s).
+    * If no parameter is passed all schemas but meta-schemas are removed.
+    * If RegExp is passed all schemas with key/id matching pattern but meta-schemas are removed.
+    * Even if schema is referenced by other schemas it still can be removed as other schemas have local references.
+    * @param  {string|object|RegExp|Boolean} schemaKeyRef key, ref, pattern to match key/ref or schema object
+    * @return {Ajv} this for method chaining
+    */
+    removeSchema(schemaKeyRef?: object | string | RegExp | boolean): Ajv;
+    /**
+    * Add custom format
+    * @param {string} name format name
+    * @param {string|RegExp|Function} format string is converted to RegExp; function should return boolean (true when valid)
+    * @return {Ajv} this for method chaining
+    */
+    addFormat(name: string, format: FormatValidator | FormatDefinition): Ajv;
+    /**
+    * Define custom keyword
+    * @this  Ajv
+    * @param {string} keyword custom keyword, should be a valid identifier, should be different from all standard, custom and macro keywords.
+    * @param {object} definition keyword definition object with properties `type` (type(s) which the keyword applies to), `validate` or `compile`.
+    * @return {Ajv} this for method chaining
+    */
+    addKeyword(keyword: string, definition: KeywordDefinition): Ajv;
+    /**
+    * Get keyword definition
+    * @this  Ajv
+    * @param {string} keyword pre-defined or custom keyword.
+    * @return {object|Boolean} custom keyword definition, `true` if it is a predefined keyword, `false` otherwise.
+    */
+    getKeyword(keyword: string): object | boolean;
+    /**
+    * Remove keyword
+    * @this  Ajv
+    * @param {string} keyword pre-defined or custom keyword.
+    * @return {Ajv} this for method chaining
+    */
+    removeKeyword(keyword: string): Ajv;
+    /**
+    * Validate keyword
+    * @this  Ajv
+    * @param {object} definition keyword definition object
+    * @param {boolean} throwError true to throw exception if definition is invalid
+    * @return {boolean} validation result
+    */
+    validateKeyword(definition: KeywordDefinition, throwError: boolean): boolean;
+    /**
+    * Convert array of error message objects to string
+    * @param  {Array<object>} errors optional array of validation errors, if not passed errors from the instance are used.
+    * @param  {object} options optional options with properties `separator` and `dataVar`.
+    * @return {string} human readable string with all errors descriptions
+    */
+    errorsText(errors?: Array<ErrorObject> | null, options?: ErrorsTextOptions): string;
+    errors?: Array<ErrorObject> | null;
+    _opts: Options;
+  }
+
+  interface CustomLogger {
+    log(...args: any[]): any;
+    warn(...args: any[]): any;
+    error(...args: any[]): any;
+  }
+
+  interface ValidateFunction {
+    (
+      data: any,
+      dataPath?: string,
+      parentData?: object | Array<any>,
+      parentDataProperty?: string | number,
+      rootData?: object | Array<any>
+    ): boolean | PromiseLike<any>;
+    schema?: object | boolean;
+    errors?: null | Array<ErrorObject>;
+    refs?: object;
+    refVal?: Array<any>;
+    root?: ValidateFunction | object;
+    $async?: true;
+    source?: object;
+  }
+
+  interface Options {
+    $data?: boolean;
+    allErrors?: boolean;
+    verbose?: boolean;
+    jsonPointers?: boolean;
+    uniqueItems?: boolean;
+    unicode?: boolean;
+    format?: false | string;
+    formats?: object;
+    keywords?: object;
+    unknownFormats?: true | string[] | 'ignore';
+    schemas?: Array<object> | object;
+    schemaId?: '$id' | 'id' | 'auto';
+    missingRefs?: true | 'ignore' | 'fail';
+    extendRefs?: true | 'ignore' | 'fail';
+    loadSchema?: (uri: string, cb?: (err: Error, schema: object) => void) => PromiseLike<object | boolean>;
+    removeAdditional?: boolean | 'all' | 'failing';
+    useDefaults?: boolean | 'empty' | 'shared';
+    coerceTypes?: boolean | 'array';
+    strictDefaults?: boolean | 'log';
+    strictKeywords?: boolean | 'log';
+    strictNumbers?: boolean;
+    async?: boolean | string;
+    transpile?: string | ((code: string) => string);
+    meta?: boolean | object;
+    validateSchema?: boolean | 'log';
+    addUsedSchema?: boolean;
+    inlineRefs?: boolean | number;
+    passContext?: boolean;
+    loopRequired?: number;
+    ownProperties?: boolean;
+    multipleOfPrecision?: boolean | number;
+    errorDataPath?: string,
+    messages?: boolean;
+    sourceCode?: boolean;
+    processCode?: (code: string, schema: object) => string;
+    cache?: object;
+    logger?: CustomLogger | false;
+    nullable?: boolean;
+    serialize?: ((schema: object | boolean) => any) | false;
+  }
+
+  type FormatValidator = string | RegExp | ((data: string) => boolean | PromiseLike<any>);
+  type NumberFormatValidator = ((data: number) => boolean | PromiseLike<any>);
+
+  interface NumberFormatDefinition {
+    type: "number",
+    validate: NumberFormatValidator;
+    compare?: (data1: number, data2: number) => number;
+    async?: boolean;
+  }
+
+  interface StringFormatDefinition {
+    type?: "string",
+    validate: FormatValidator;
+    compare?: (data1: string, data2: string) => number;
+    async?: boolean;
+  }
+
+  type FormatDefinition = NumberFormatDefinition | StringFormatDefinition;
+
+  interface KeywordDefinition {
+    type?: string | Array<string>;
+    async?: boolean;
+    $data?: boolean;
+    errors?: boolean | string;
+    metaSchema?: object;
+    // schema: false makes validate not to expect schema (ValidateFunction)
+    schema?: boolean;
+    statements?: boolean;
+    dependencies?: Array<string>;
+    modifying?: boolean;
+    valid?: boolean;
+    // one and only one of the following properties should be present
+    validate?: SchemaValidateFunction | ValidateFunction;
+    compile?: (schema: any, parentSchema: object, it: CompilationContext) => ValidateFunction;
+    macro?: (schema: any, parentSchema: object, it: CompilationContext) => object | boolean;
+    inline?: (it: CompilationContext, keyword: string, schema: any, parentSchema: object) => string;
+  }
+
+  interface CompilationContext {
+    level: number;
+    dataLevel: number;
+    dataPathArr: string[];
+    schema: any;
+    schemaPath: string;
+    baseId: string;
+    async: boolean;
+    opts: Options;
+    formats: {
+      [index: string]: FormatDefinition | undefined;
+    };
+    keywords: {
+      [index: string]: KeywordDefinition | undefined;
+    };
+    compositeRule: boolean;
+    validate: (schema: object) => boolean;
+    util: {
+      copy(obj: any, target?: any): any;
+      toHash(source: string[]): { [index: string]: true | undefined };
+      equal(obj: any, target: any): boolean;
+      getProperty(str: string): string;
+      schemaHasRules(schema: object, rules: any): string;
+      escapeQuotes(str: string): string;
+      toQuotedString(str: string): string;
+      getData(jsonPointer: string, dataLevel: number, paths: string[]): string;
+      escapeJsonPointer(str: string): string;
+      unescapeJsonPointer(str: string): string;
+      escapeFragment(str: string): string;
+      unescapeFragment(str: string): string;
+    };
+    self: Ajv;
+  }
+
+  interface SchemaValidateFunction {
+    (
+      schema: any,
+      data: any,
+      parentSchema?: object,
+      dataPath?: string,
+      parentData?: object | Array<any>,
+      parentDataProperty?: string | number,
+      rootData?: object | Array<any>
+    ): boolean | PromiseLike<any>;
+    errors?: Array<ErrorObject>;
+  }
+
+  interface ErrorsTextOptions {
+    separator?: string;
+    dataVar?: string;
+  }
+
+  interface ErrorObject {
+    keyword: string;
+    dataPath: string;
+    schemaPath: string;
+    params: ErrorParameters;
+    // Added to validation errors of propertyNames keyword schema
+    propertyName?: string;
+    // Excluded if messages set to false.
+    message?: string;
+    // These are added with the `verbose` option.
+    schema?: any;
+    parentSchema?: object;
+    data?: any;
+  }
+
+  type ErrorParameters = RefParams | LimitParams | AdditionalPropertiesParams |
+    DependenciesParams | FormatParams | ComparisonParams |
+    MultipleOfParams | PatternParams | RequiredParams |
+    TypeParams | UniqueItemsParams | CustomParams |
+    PatternRequiredParams | PropertyNamesParams |
+    IfParams | SwitchParams | NoParams | EnumParams;
+
+  interface RefParams {
+    ref: string;
+  }
+
+  interface LimitParams {
+    limit: number;
+  }
+
+  interface AdditionalPropertiesParams {
+    additionalProperty: string;
+  }
+
+  interface DependenciesParams {
+    property: string;
+    missingProperty: string;
+    depsCount: number;
+    deps: string;
+  }
+
+  interface FormatParams {
+    format: string
+  }
+
+  interface ComparisonParams {
+    comparison: string;
+    limit: number | string;
+    exclusive: boolean;
+  }
+
+  interface MultipleOfParams {
+    multipleOf: number;
+  }
+
+  interface PatternParams {
+    pattern: string;
+  }
+
+  interface RequiredParams {
+    missingProperty: string;
+  }
+
+  interface TypeParams {
+    type: string;
+  }
+
+  interface UniqueItemsParams {
+    i: number;
+    j: number;
+  }
+
+  interface CustomParams {
+    keyword: string;
+  }
+
+  interface PatternRequiredParams {
+    missingPattern: string;
+  }
+
+  interface PropertyNamesParams {
+    propertyName: string;
+  }
+
+  interface IfParams {
+    failingKeyword: string;
+  }
+
+  interface SwitchParams {
+    caseIndex: number;
+  }
+
+  interface NoParams { }
+
+  interface EnumParams {
+    allowedValues: Array<any>;
+  }
+}
+
+export = ajv;

node_modules/@eslint/eslintrc/node_modules/ajv/lib/ajv.js

@@ -0,0 +1,506 @@
+'use strict';
+
+var compileSchema = require('./compile')
+  , resolve = require('./compile/resolve')
+  , Cache = require('./cache')
+  , SchemaObject = require('./compile/schema_obj')
+  , stableStringify = require('fast-json-stable-stringify')
+  , formats = require('./compile/formats')
+  , rules = require('./compile/rules')
+  , $dataMetaSchema = require('./data')
+  , util = require('./compile/util');
+
+module.exports = Ajv;
+
+Ajv.prototype.validate = validate;
+Ajv.prototype.compile = compile;
+Ajv.prototype.addSchema = addSchema;
+Ajv.prototype.addMetaSchema = addMetaSchema;
+Ajv.prototype.validateSchema = validateSchema;
+Ajv.prototype.getSchema = getSchema;
+Ajv.prototype.removeSchema = removeSchema;
+Ajv.prototype.addFormat = addFormat;
+Ajv.prototype.errorsText = errorsText;
+
+Ajv.prototype._addSchema = _addSchema;
+Ajv.prototype._compile = _compile;
+
+Ajv.prototype.compileAsync = require('./compile/async');
+var customKeyword = require('./keyword');
+Ajv.prototype.addKeyword = customKeyword.add;
+Ajv.prototype.getKeyword = customKeyword.get;
+Ajv.prototype.removeKeyword = customKeyword.remove;
+Ajv.prototype.validateKeyword = customKeyword.validate;
+
+var errorClasses = require('./compile/error_classes');
+Ajv.ValidationError = errorClasses.Validation;
+Ajv.MissingRefError = errorClasses.MissingRef;
+Ajv.$dataMetaSchema = $dataMetaSchema;
+
+var META_SCHEMA_ID = 'http://json-schema.org/draft-07/schema';
+
+var META_IGNORE_OPTIONS = [ 'removeAdditional', 'useDefaults', 'coerceTypes', 'strictDefaults' ];
+var META_SUPPORT_DATA = ['/properties'];
+
+/**
+ * Creates validator instance.
+ * Usage: `Ajv(opts)`
+ * @param {Object} opts optional options
+ * @return {Object} ajv instance
+ */
+function Ajv(opts) {
+  if (!(this instanceof Ajv)) return new Ajv(opts);
+  opts = this._opts = util.copy(opts) || {};
+  setLogger(this);
+  this._schemas = {};
+  this._refs = {};
+  this._fragments = {};
+  this._formats = formats(opts.format);
+
+  this._cache = opts.cache || new Cache;
+  this._loadingSchemas = {};
+  this._compilations = [];
+  this.RULES = rules();
+  this._getId = chooseGetId(opts);
+
+  opts.loopRequired = opts.loopRequired || Infinity;
+  if (opts.errorDataPath == 'property') opts._errorDataPathProperty = true;
+  if (opts.serialize === undefined) opts.serialize = stableStringify;
+  this._metaOpts = getMetaSchemaOptions(this);
+
+  if (opts.formats) addInitialFormats(this);
+  if (opts.keywords) addInitialKeywords(this);
+  addDefaultMetaSchema(this);
+  if (typeof opts.meta == 'object') this.addMetaSchema(opts.meta);
+  if (opts.nullable) this.addKeyword('nullable', {metaSchema: {type: 'boolean'}});
+  addInitialSchemas(this);
+}
+
+
+
+/**
+ * Validate data using schema
+ * Schema will be compiled and cached (using serialized JSON as key. [fast-json-stable-stringify](https://github.com/epoberezkin/fast-json-stable-stringify) is used to serialize.
+ * @this   Ajv
+ * @param  {String|Object} schemaKeyRef key, ref or schema object
+ * @param  {Any} data to be validated
+ * @return {Boolean} validation result. Errors from the last validation will be available in `ajv.errors` (and also in compiled schema: `schema.errors`).
+ */
+function validate(schemaKeyRef, data) {
+  var v;
+  if (typeof schemaKeyRef == 'string') {
+    v = this.getSchema(schemaKeyRef);
+    if (!v) throw new Error('no schema with key or ref "' + schemaKeyRef + '"');
+  } else {
+    var schemaObj = this._addSchema(schemaKeyRef);
+    v = schemaObj.validate || this._compile(schemaObj);
+  }
+
+  var valid = v(data);
+  if (v.$async !== true) this.errors = v.errors;
+  return valid;
+}
+
+
+/**
+ * Create validating function for passed schema.
+ * @this   Ajv
+ * @param  {Object} schema schema object
+ * @param  {Boolean} _meta true if schema is a meta-schema. Used internally to compile meta schemas of custom keywords.
+ * @return {Function} validating function
+ */
+function compile(schema, _meta) {
+  var schemaObj = this._addSchema(schema, undefined, _meta);
+  return schemaObj.validate || this._compile(schemaObj);
+}
+
+
+/**
+ * Adds schema to the instance.
+ * @this   Ajv
+ * @param {Object|Array} schema schema or array of schemas. If array is passed, `key` and other parameters will be ignored.
+ * @param {String} key Optional schema key. Can be passed to `validate` method instead of schema object or id/ref. One schema per instance can have empty `id` and `key`.
+ * @param {Boolean} _skipValidation true to skip schema validation. Used internally, option validateSchema should be used instead.
+ * @param {Boolean} _meta true if schema is a meta-schema. Used internally, addMetaSchema should be used instead.
+ * @return {Ajv} this for method chaining
+ */
+function addSchema(schema, key, _skipValidation, _meta) {
+  if (Array.isArray(schema)){
+    for (var i=0; i<schema.length; i++) this.addSchema(schema[i], undefined, _skipValidation, _meta);
+    return this;
+  }
+  var id = this._getId(schema);
+  if (id !== undefined && typeof id != 'string')
+    throw new Error('schema id must be string');
+  key = resolve.normalizeId(key || id);
+  checkUnique(this, key);
+  this._schemas[key] = this._addSchema(schema, _skipValidation, _meta, true);
+  return this;
+}
+
+
+/**
+ * Add schema that will be used to validate other schemas
+ * options in META_IGNORE_OPTIONS are alway set to false
+ * @this   Ajv
+ * @param {Object} schema schema object
+ * @param {String} key optional schema key
+ * @param {Boolean} skipValidation true to skip schema validation, can be used to override validateSchema option for meta-schema
+ * @return {Ajv} this for method chaining
+ */
+function addMetaSchema(schema, key, skipValidation) {
+  this.addSchema(schema, key, skipValidation, true);
+  return this;
+}
+
+
+/**
+ * Validate schema
+ * @this   Ajv
+ * @param {Object} schema schema to validate
+ * @param {Boolean} throwOrLogError pass true to throw (or log) an error if invalid
+ * @return {Boolean} true if schema is valid
+ */
+function validateSchema(schema, throwOrLogError) {
+  var $schema = schema.$schema;
+  if ($schema !== undefined && typeof $schema != 'string')
+    throw new Error('$schema must be a string');
+  $schema = $schema || this._opts.defaultMeta || defaultMeta(this);
+  if (!$schema) {
+    this.logger.warn('meta-schema not available');
+    this.errors = null;
+    return true;
+  }
+  var valid = this.validate($schema, schema);
+  if (!valid && throwOrLogError) {
+    var message = 'schema is invalid: ' + this.errorsText();
+    if (this._opts.validateSchema == 'log') this.logger.error(message);
+    else throw new Error(message);
+  }
+  return valid;
+}
+
+
+function defaultMeta(self) {
+  var meta = self._opts.meta;
+  self._opts.defaultMeta = typeof meta == 'object'
+                            ? self._getId(meta) || meta
+                            : self.getSchema(META_SCHEMA_ID)
+                              ? META_SCHEMA_ID
+                              : undefined;
+  return self._opts.defaultMeta;
+}
+
+
+/**
+ * Get compiled schema from the instance by `key` or `ref`.
+ * @this   Ajv
+ * @param  {String} keyRef `key` that was passed to `addSchema` or full schema reference (`schema.id` or resolved id).
+ * @return {Function} schema validating function (with property `schema`).
+ */
+function getSchema(keyRef) {
+  var schemaObj = _getSchemaObj(this, keyRef);
+  switch (typeof schemaObj) {
+    case 'object': return schemaObj.validate || this._compile(schemaObj);
+    case 'string': return this.getSchema(schemaObj);
+    case 'undefined': return _getSchemaFragment(this, keyRef);
+  }
+}
+
+
+function _getSchemaFragment(self, ref) {
+  var res = resolve.schema.call(self, { schema: {} }, ref);
+  if (res) {
+    var schema = res.schema
+      , root = res.root
+      , baseId = res.baseId;
+    var v = compileSchema.call(self, schema, root, undefined, baseId);
+    self._fragments[ref] = new SchemaObject({
+      ref: ref,
+      fragment: true,
+      schema: schema,
+      root: root,
+      baseId: baseId,
+      validate: v
+    });
+    return v;
+  }
+}
+
+
+function _getSchemaObj(self, keyRef) {
+  keyRef = resolve.normalizeId(keyRef);
+  return self._schemas[keyRef] || self._refs[keyRef] || self._fragments[keyRef];
+}
+
+
+/**
+ * Remove cached schema(s).
+ * If no parameter is passed all schemas but meta-schemas are removed.
+ * If RegExp is passed all schemas with key/id matching pattern but meta-schemas are removed.
+ * Even if schema is referenced by other schemas it still can be removed as other schemas have local references.
+ * @this   Ajv
+ * @param  {String|Object|RegExp} schemaKeyRef key, ref, pattern to match key/ref or schema object
+ * @return {Ajv} this for method chaining
+ */
+function removeSchema(schemaKeyRef) {
+  if (schemaKeyRef instanceof RegExp) {
+    _removeAllSchemas(this, this._schemas, schemaKeyRef);
+    _removeAllSchemas(this, this._refs, schemaKeyRef);
+    return this;
+  }
+  switch (typeof schemaKeyRef) {
+    case 'undefined':
+      _removeAllSchemas(this, this._schemas);
+      _removeAllSchemas(this, this._refs);
+      this._cache.clear();
+      return this;
+    case 'string':
+      var schemaObj = _getSchemaObj(this, schemaKeyRef);
+      if (schemaObj) this._cache.del(schemaObj.cacheKey);
+      delete this._schemas[schemaKeyRef];
+      delete this._refs[schemaKeyRef];
+      return this;
+    case 'object':
+      var serialize = this._opts.serialize;
+      var cacheKey = serialize ? serialize(schemaKeyRef) : schemaKeyRef;
+      this._cache.del(cacheKey);
+      var id = this._getId(schemaKeyRef);
+      if (id) {
+        id = resolve.normalizeId(id);
+        delete this._schemas[id];
+        delete this._refs[id];
+      }
+  }
+  return this;
+}
+
+
+function _removeAllSchemas(self, schemas, regex) {
+  for (var keyRef in schemas) {
+    var schemaObj = schemas[keyRef];
+    if (!schemaObj.meta && (!regex || regex.test(keyRef))) {
+      self._cache.del(schemaObj.cacheKey);
+      delete schemas[keyRef];
+    }
+  }
+}
+
+
+/* @this   Ajv */
+function _addSchema(schema, skipValidation, meta, shouldAddSchema) {
+  if (typeof schema != 'object' && typeof schema != 'boolean')
+    throw new Error('schema should be object or boolean');
+  var serialize = this._opts.serialize;
+  var cacheKey = serialize ? serialize(schema) : schema;
+  var cached = this._cache.get(cacheKey);
+  if (cached) return cached;
+
+  shouldAddSchema = shouldAddSchema || this._opts.addUsedSchema !== false;
+
+  var id = resolve.normalizeId(this._getId(schema));
+  if (id && shouldAddSchema) checkUnique(this, id);
+
+  var willValidate = this._opts.validateSchema !== false && !skipValidation;
+  var recursiveMeta;
+  if (willValidate && !(recursiveMeta = id && id == resolve.normalizeId(schema.$schema)))
+    this.validateSchema(schema, true);
+
+  var localRefs = resolve.ids.call(this, schema);
+
+  var schemaObj = new SchemaObject({
+    id: id,
+    schema: schema,
+    localRefs: localRefs,
+    cacheKey: cacheKey,
+    meta: meta
+  });
+
+  if (id[0] != '#' && shouldAddSchema) this._refs[id] = schemaObj;
+  this._cache.put(cacheKey, schemaObj);
+
+  if (willValidate && recursiveMeta) this.validateSchema(schema, true);
+
+  return schemaObj;
+}
+
+
+/* @this   Ajv */
+function _compile(schemaObj, root) {
+  if (schemaObj.compiling) {
+    schemaObj.validate = callValidate;
+    callValidate.schema = schemaObj.schema;
+    callValidate.errors = null;
+    callValidate.root = root ? root : callValidate;
+    if (schemaObj.schema.$async === true)
+      callValidate.$async = true;
+    return callValidate;
+  }
+  schemaObj.compiling = true;
+
+  var currentOpts;
+  if (schemaObj.meta) {
+    currentOpts = this._opts;
+    this._opts = this._metaOpts;
+  }
+
+  var v;
+  try { v = compileSchema.call(this, schemaObj.schema, root, schemaObj.localRefs); }
+  catch(e) {
+    delete schemaObj.validate;
+    throw e;
+  }
+  finally {
+    schemaObj.compiling = false;
+    if (schemaObj.meta) this._opts = currentOpts;
+  }
+
+  schemaObj.validate = v;
+  schemaObj.refs = v.refs;
+  schemaObj.refVal = v.refVal;
+  schemaObj.root = v.root;
+  return v;
+
+
+  /* @this   {*} - custom context, see passContext option */
+  function callValidate() {
+    /* jshint validthis: true */
+    var _validate = schemaObj.validate;
+    var result = _validate.apply(this, arguments);
+    callValidate.errors = _validate.errors;
+    return result;
+  }
+}
+
+
+function chooseGetId(opts) {
+  switch (opts.schemaId) {
+    case 'auto': return _get$IdOrId;
+    case 'id': return _getId;
+    default: return _get$Id;
+  }
+}
+
+/* @this   Ajv */
+function _getId(schema) {
+  if (schema.$id) this.logger.warn('schema $id ignored', schema.$id);
+  return schema.id;
+}
+
+/* @this   Ajv */
+function _get$Id(schema) {
+  if (schema.id) this.logger.warn('schema id ignored', schema.id);
+  return schema.$id;
+}
+
+
+function _get$IdOrId(schema) {
+  if (schema.$id && schema.id && schema.$id != schema.id)
+    throw new Error('schema $id is different from id');
+  return schema.$id || schema.id;
+}
+
+
+/**
+ * Convert array of error message objects to string
+ * @this   Ajv
+ * @param  {Array<Object>} errors optional array of validation errors, if not passed errors from the instance are used.
+ * @param  {Object} options optional options with properties `separator` and `dataVar`.
+ * @return {String} human readable string with all errors descriptions
+ */
+function errorsText(errors, options) {
+  errors = errors || this.errors;
+  if (!errors) return 'No errors';
+  options = options || {};
+  var separator = options.separator === undefined ? ', ' : options.separator;
+  var dataVar = options.dataVar === undefined ? 'data' : options.dataVar;
+
+  var text = '';
+  for (var i=0; i<errors.length; i++) {
+    var e = errors[i];
+    if (e) text += dataVar + e.dataPath + ' ' + e.message + separator;
+  }
+  return text.slice(0, -separator.length);
+}
+
+
+/**
+ * Add custom format
+ * @this   Ajv
+ * @param {String} name format name
+ * @param {String|RegExp|Function} format string is converted to RegExp; function should return boolean (true when valid)
+ * @return {Ajv} this for method chaining
+ */
+function addFormat(name, format) {
+  if (typeof format == 'string') format = new RegExp(format);
+  this._formats[name] = format;
+  return this;
+}
+
+
+function addDefaultMetaSchema(self) {
+  var $dataSchema;
+  if (self._opts.$data) {
+    $dataSchema = require('./refs/data.json');
+    self.addMetaSchema($dataSchema, $dataSchema.$id, true);
+  }
+  if (self._opts.meta === false) return;
+  var metaSchema = require('./refs/json-schema-draft-07.json');
+  if (self._opts.$data) metaSchema = $dataMetaSchema(metaSchema, META_SUPPORT_DATA);
+  self.addMetaSchema(metaSchema, META_SCHEMA_ID, true);
+  self._refs['http://json-schema.org/schema'] = META_SCHEMA_ID;
+}
+
+
+function addInitialSchemas(self) {
+  var optsSchemas = self._opts.schemas;
+  if (!optsSchemas) return;
+  if (Array.isArray(optsSchemas)) self.addSchema(optsSchemas);
+  else for (var key in optsSchemas) self.addSchema(optsSchemas[key], key);
+}
+
+
+function addInitialFormats(self) {
+  for (var name in self._opts.formats) {
+    var format = self._opts.formats[name];
+    self.addFormat(name, format);
+  }
+}
+
+
+function addInitialKeywords(self) {
+  for (var name in self._opts.keywords) {
+    var keyword = self._opts.keywords[name];
+    self.addKeyword(name, keyword);
+  }
+}
+
+
+function checkUnique(self, id) {
+  if (self._schemas[id] || self._refs[id])
+    throw new Error('schema with key or id "' + id + '" already exists');
+}
+
+
+function getMetaSchemaOptions(self) {
+  var metaOpts = util.copy(self._opts);
+  for (var i=0; i<META_IGNORE_OPTIONS.length; i++)
+    delete metaOpts[META_IGNORE_OPTIONS[i]];
+  return metaOpts;
+}
+
+
+function setLogger(self) {
+  var logger = self._opts.logger;
+  if (logger === false) {
+    self.logger = {log: noop, warn: noop, error: noop};
+  } else {
+    if (logger === undefined) logger = console;
+    if (!(typeof logger == 'object' && logger.log && logger.warn && logger.error))
+      throw new Error('logger must implement log, warn and error methods');
+    self.logger = logger;
+  }
+}
+
+
+function noop() {}

node_modules/@eslint/eslintrc/node_modules/ajv/lib/cache.js

@@ -0,0 +1,26 @@
+'use strict';
+
+
+var Cache = module.exports = function Cache() {
+  this._cache = {};
+};
+
+
+Cache.prototype.put = function Cache_put(key, value) {
+  this._cache[key] = value;
+};
+
+
+Cache.prototype.get = function Cache_get(key) {
+  return this._cache[key];
+};
+
+
+Cache.prototype.del = function Cache_del(key) {
+  delete this._cache[key];
+};
+
+
+Cache.prototype.clear = function Cache_clear() {
+  this._cache = {};
+};

node_modules/@eslint/eslintrc/node_modules/ajv/lib/compile/async.js

@@ -0,0 +1,90 @@
+'use strict';
+
+var MissingRefError = require('./error_classes').MissingRef;
+
+module.exports = compileAsync;
+
+
+/**
+ * Creates validating function for passed schema with asynchronous loading of missing schemas.
+ * `loadSchema` option should be a function that accepts schema uri and returns promise that resolves with the schema.
+ * @this  Ajv
+ * @param {Object}   schema schema object
+ * @param {Boolean}  meta optional true to compile meta-schema; this parameter can be skipped
+ * @param {Function} callback an optional node-style callback, it is called with 2 parameters: error (or null) and validating function.
+ * @return {Promise} promise that resolves with a validating function.
+ */
+function compileAsync(schema, meta, callback) {
+  /* eslint no-shadow: 0 */
+  /* global Promise */
+  /* jshint validthis: true */
+  var self = this;
+  if (typeof this._opts.loadSchema != 'function')
+    throw new Error('options.loadSchema should be a function');
+
+  if (typeof meta == 'function') {
+    callback = meta;
+    meta = undefined;
+  }
+
+  var p = loadMetaSchemaOf(schema).then(function () {
+    var schemaObj = self._addSchema(schema, undefined, meta);
+    return schemaObj.validate || _compileAsync(schemaObj);
+  });
+
+  if (callback) {
+    p.then(
+      function(v) { callback(null, v); },
+      callback
+    );
+  }
+
+  return p;
+
+
+  function loadMetaSchemaOf(sch) {
+    var $schema = sch.$schema;
+    return $schema && !self.getSchema($schema)
+            ? compileAsync.call(self, { $ref: $schema }, true)
+            : Promise.resolve();
+  }
+
+
+  function _compileAsync(schemaObj) {
+    try { return self._compile(schemaObj); }
+    catch(e) {
+      if (e instanceof MissingRefError) return loadMissingSchema(e);
+      throw e;
+    }
+
+
+    function loadMissingSchema(e) {
+      var ref = e.missingSchema;
+      if (added(ref)) throw new Error('Schema ' + ref + ' is loaded but ' + e.missingRef + ' cannot be resolved');
+
+      var schemaPromise = self._loadingSchemas[ref];
+      if (!schemaPromise) {
+        schemaPromise = self._loadingSchemas[ref] = self._opts.loadSchema(ref);
+        schemaPromise.then(removePromise, removePromise);
+      }
+
+      return schemaPromise.then(function (sch) {
+        if (!added(ref)) {
+          return loadMetaSchemaOf(sch).then(function () {
+            if (!added(ref)) self.addSchema(sch, ref, undefined, meta);
+          });
+        }
+      }).then(function() {
+        return _compileAsync(schemaObj);
+      });
+
+      function removePromise() {
+        delete self._loadingSchemas[ref];
+      }
+
+      function added(ref) {
+        return self._refs[ref] || self._schemas[ref];
+      }
+    }
+  }
+}

node_modules/@eslint/eslintrc/node_modules/ajv/lib/compile/equal.js

@@ -0,0 +1,5 @@
+'use strict';
+
+// do NOT remove this file - it would break pre-compiled schemas
+// https://github.com/ajv-validator/ajv/issues/889
+module.exports = require('fast-deep-equal');