#Dependencies

#Dependency Policy

The mataroa project has an unusually strict yet usually unclear dependency policy.

Vague rules include:

• No third-party Django apps.
• All Python / PyPI packages should be individually vetted.
  • Packages should be published from community-trusted organisations or developers.
  • Packages should be actively maintained (though not necessarily actively developed).
  • Packages should hold a high quality of coding practices.
• No JavaScript libraries / dependencies.

Current list of top-level PyPI dependencies (source at pyproject.toml):

• Django
• psycopg
• gunicorn
• Markdown
• Pygments
• bleach
• stripe

#Adding a new dependency

After approving a dependency, add it using uv:

1. Ensure uv is installed and a virtualenv exists (managed by uv).
2. Add the dependency to pyproject.toml and lockfile with:
   • Runtime: uv add PACKAGE
   • Dev-only: uv add --dev PACKAGE
3. Install/sync dependencies: uv sync

#Upgrading dependencies

When a new Django version is out it’s a good idea to upgrade everything.

Steps:

1. Update the lockfile: uv lock --upgrade
2. Review changes: git diff uv.lock and spot non-patch level version bumps.
3. Examine release notes of each one.
4. Install updated deps: uv sync
5. Unless something comes up, make sure tests and smoke tests pass.
6. Deploy new dependency versions.