python-versions.yml

name: Python versions

# pyproject.toml's requires-python is the only place that names a Python
# version. Every workflow that needs one calls this and reads it back, so
# bumping requires-python moves the lint, test and report jobs together.
on:
  workflow_call:
    outputs:
      all:
        description: JSON array of every supported Python version, oldest first.
        value: ${{ jobs.resolve.outputs.all }}
      latest:
        description: The newest supported Python version.
        value: ${{ jobs.resolve.outputs.latest }}

jobs:
  resolve:
    runs-on: ubuntu-latest
    timeout-minutes: 30
    outputs:
      all: ${{ steps.resolve.outputs.all }}
      latest: ${{ steps.resolve.outputs.latest }}
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - name: Install uv
        uses: astral-sh/setup-uv@20cfd1bf945f4377ade1205e4dbc17946fc9a30d # v10.0.1

      - name: Resolve supported Python versions
        id: resolve
        run: uv run --script .github/scripts/python_versions.py >> "$GITHUB_OUTPUT"