Use uv in GitHub Actions

[philgyford]

They're working OK with pip now, but would be nice to change over.

Use the setup-uv action.

See adamchainz's repos for examples, e.g. https://github.com/adamchainz/django-upgrade/blob/main/.github/workflows/main.yml

[philgyford]

As you can see this was a struggle.

The issue seemed to be that if one of a python group failed, they were all marked as failed.

So, python311-djangomain would fail (because on djangomain, format_html() requires args or kwargs, which my code currently isn't using.

But it would mark not only python311-djangomain as failing, but also python311-django42 and python311-django51 as failing too.

Ran out of random things to try. This is where we got to:

name: Tests

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

env:
  FORCE_COLOR: 1

jobs:
  test:
    name: "Python ${{ matrix.python-version }}, Django ${{ matrix.django-version}}"
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
        django-version: ["4.2", "5.1", "main"]
        exclude:
          - python-version: "3.13"
            django-version: "4.2"
          - python-version: "3.9"
            django-version: "5.1"
          - python-version: "3.9"
            django-version: "main"

    steps:
      - name: Git clone
        uses: actions/checkout@v4

      - name: Install Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}

      - name: Install uv
        uses: astral-sh/setup-uv@v5
        with:
          enable-cache: False
          # cache-dependency-glob: "pyproject.toml"
          # cache-suffix: ${{ matrix.python-version }}
          # cache-suffix: ${{ matrix.python-version }}-${{ matrix.django-version}}

      - name: Sync uv
        run: uv sync --dev

      - name: Test with Tox
        run: uv run --with tox --with tox-uv --with tox-gh-actions tox --parallel auto
        env:
          DJANGO: ${{ matrix.django-version }}

      - name: Upload Coverage to Codecov
        uses: codecov/codecov-action@v5
        with:
          flags: ${{ matrix.python-version }}
          name: Python ${{ matrix.python-version }}
          token: ${{ secrets.CODECOV_TOKEN }}

  ruff:
    name: Run ruff
    runs-on: ubuntu-latest

    steps:
      - name: Git clone
        uses: actions/checkout@v4

      - name: Install uv and set Python version
        uses: astral-sh/setup-uv@v5
        with:
          python-version: "3.12"

      - name: Install dependencies
        run: uv pip install ruff tox tox-gh-actions tox-uv

      - name: Run ruff
        run: tox -e ruff

  slack:
    # https://github.com/8398a7/action-slack/issues/72#issuecomment-649910353
    name: Slack notification
    runs-on: ubuntu-latest
    needs: [test, ruff]

    # this is required, otherwise it gets skipped if any needed jobs fail.
    # https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idneeds
    if: always() # Pick up events even if the job fails or is cancelled.

    steps:
      - uses: technote-space/workflow-conclusion-action@v3

      - name: Send Slack notification
        uses: 8398a7/action-slack@v3
        with:
          status: ${{ job.status }}
          # fields: repo,message,commit,author,action,eventName,ref,workflow,job,took # selectable (default: repo,message)
          fields: repo,message,commit,author,action
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.ACTIONS_CI_SLACK_HOOK }}