Edward Betts
53aab8c4bc
Flask is now declared under [project.optional-dependencies] as the `web` extra, so `pip install osm-geojson[web]` installs both the CLI and Flask. The `dev` extra includes Flask too so the test/dev venv gets everything. Update README and AGENTS.md accordingly. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
125 lines
3.7 KiB
Markdown
125 lines
3.7 KiB
Markdown
# AGENTS.md
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Guidelines for AI coding agents working in this repository.
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## Project overview
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A collection of Python tools for working with OpenStreetMap public transport
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data. Includes a CLI tool and a Flask web frontend with a JSON API.
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## Repository layout
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```
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pyproject.toml - Package metadata and build configuration
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src/
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osm_geojson/
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__init__.py - Top-level package marker
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py.typed - Marker for mypy typed package
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pt/
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__init__.py - Public transport subpackage
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core.py - Data fetching and processing functions
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cli.py - Click CLI commands
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web/
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app.py - Flask application (routes + API endpoints)
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templates/
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index.html - Main map UI
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api.html - API documentation page (served at /docs)
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static/
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app.js - Frontend JavaScript
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style.css - CSS for the map UI
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favicon.svg - SVG favicon
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tests/
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fixtures/ - Saved OSM API responses for offline testing
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test_osm_pt_geojson.py - Test suite
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README.md - User-facing documentation
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AGENTS.md - This file
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```
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`osm_geojson` is the top-level namespace for all tools in this collection. Each
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tool lives in its own subpackage (e.g. `osm_geojson.pt`), with its CLI entry
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point registered in `pyproject.toml` under `[project.scripts]`.
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## Code conventions
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- Python 3.11+
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- CLI via [Click](https://click.palletsprojects.com/)
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- HTTP via [Requests](https://requests.readthedocs.io/)
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- Web frontend via [Flask](https://flask.palletsprojects.com/) 3.x
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- Parse XML with lxml if needed; prefer the OSM JSON API where possible
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- Errors go to stderr; data output goes to stdout (CLI)
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- GeoJSON output uses `ensure_ascii=False`
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- All modules, functions, and test functions must have docstrings
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- Library code (`core.py`) raises `OsmError` instead of calling `sys.exit()`;
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the CLI and Flask views catch `OsmError` and handle it appropriately
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## OSM API
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Tools fetch data from the public OSM API:
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```
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https://www.openstreetmap.org/api/0.6/
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```
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No authentication is required for read-only access. Include a descriptive
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`User-Agent` header in all requests.
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## Web frontend API endpoints
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| Endpoint | Description |
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|---|---|
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| `GET /api/route/<id>` | Full route GeoJSON, stop list, and sibling routes |
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| `GET /api/segment/<id>?from=NAME&to=NAME[&stops=0]` | Segment between two named stops |
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| `GET /api/route_master/<id>` | All member routes of a route_master |
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| `GET /docs` | API documentation page |
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All API responses are JSON. Errors return `{"error": "<code>", "message": "<text>"}`.
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## Running the web frontend
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```
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cd web
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flask --app app.py run
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```
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Install the package with the `web` extra to include Flask:
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```
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pip install -e ".[web]"
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```
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## Type checking
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All code uses type hints. Run mypy in strict mode to check:
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```
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mypy --strict src/osm_geojson/
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```
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## Testing
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Run the test suite with:
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```
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pytest tests/
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```
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Tests use the `responses` library to mock HTTP calls and never hit the live OSM
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API. Fixture data is stored in `tests/fixtures/` as saved API responses.
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### Example relations used during development
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| ID | Description |
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|----------|------------------------------------------|
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| 15083963 | M11 Istanbul Metro (subway, direction 1) |
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| 15083964 | M11 Istanbul Metro (subway, direction 2) |
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| 15083966 | M11 Istanbul Metro (route_master) |
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| 18892969 | Bus A1: Bristol Airport → Bus Station |
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## Dependencies
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Use a virtual environment. Install the package and test dependencies with:
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```
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python3 -m venv .venv
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.venv/bin/pip install -e ".[dev]"
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```
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