release.yml

name: Release

on:
  push:
    branches: [main]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false

permissions:
  contents: read

jobs:
  release:
    runs-on: ubuntu-latest
    environment:
      name: pypi
      url: https://pypi.org/project/template-python/
    permissions:
      contents: write
      id-token: write
    steps:
      - uses: actions/checkout@v4

      - uses: astral-sh/setup-uv@v6
        with:
          python-version: "3.12"

      - name: Read package version
        id: version
        run: |
          VERSION="$(python -c 'import tomllib; print(tomllib.load(open("pyproject.toml", "rb"))["project"]["version"])')"
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "tag=v$VERSION" >> "$GITHUB_OUTPUT"

      - name: Check if version is already published to PyPI
        id: pypi-check
        env:
          VERSION: ${{ steps.version.outputs.version }}
        run: |
          if curl --fail --silent --show-error "https://pypi.org/pypi/template-python/$VERSION/json" >/dev/null; then
            echo "template-python==$VERSION is already on PyPI; skipping package upload"
            echo "published=true" >> "$GITHUB_OUTPUT"
          else
            echo "published=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Build the package
        if: steps.pypi-check.outputs.published != 'true'
        run: uv build

      - name: Check if GitHub release already exists
        id: github-release-check
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          TAG: ${{ steps.version.outputs.tag }}
        run: |
          if gh api "repos/$GITHUB_REPOSITORY/releases/tags/$TAG" >/dev/null 2>&1; then
            echo "GitHub release $TAG already exists; skipping release creation"
            echo "exists=true" >> "$GITHUB_OUTPUT"
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Create GitHub release and tag
        if: steps.github-release-check.outputs.exists != 'true'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.tag }}
          target_commitish: ${{ github.sha }}
          name: ${{ steps.version.outputs.tag }}
          generate_release_notes: true

      - name: Publish to PyPI
        if: steps.pypi-check.outputs.published != 'true'
        uses: pypa/gh-action-pypi-publish@release/v1
        with:
          packages-dir: dist