create-release.yml

name: Create GitHub Release

on:
  workflow_dispatch:
    inputs:
      branch:
        description: 'Branch to release from'
        required: true
        default: 'beta'
  workflow_run:
    workflows: ['Test PR']
    types: [completed]
    branches: ['main', 'beta']

jobs:
  create-release:
    if: github.event_name == 'workflow_dispatch' || (github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'push')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          ref: ${{ inputs.branch || github.event.workflow_run.head_branch }}

      - name: Generate app token
        id: app-token
        uses: actions/create-github-app-token@v2
        with:
          app-id: ${{ secrets.RELEASE_APP_ID }}
          private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}

      - name: Read version
        id: version
        run: |
          VERSION=$(grep '^version' pyproject.toml | sed 's/version = "\(.*\)"/\1/')
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"

          if [[ "$VERSION" == *"b"* || "$VERSION" == *"rc"* || "$VERSION" == *"a"* ]]; then
            echo "prerelease=true" >> "$GITHUB_OUTPUT"
          else
            echo "prerelease=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Validate version matches branch
        run: |
          BRANCH="${{ inputs.branch || github.event.workflow_run.head_branch }}"
          VERSION="${{ steps.version.outputs.version }}"
          PRERELEASE="${{ steps.version.outputs.prerelease }}"

          if [[ "$BRANCH" == "beta" && "$PRERELEASE" == "false" ]]; then
            echo "::error::Beta branch must have a prerelease version (e.g. 3.1.0b0), got '$VERSION'"
            exit 1
          fi

          if [[ "$BRANCH" == "main" && "$PRERELEASE" == "true" ]]; then
            echo "::error::Main branch must not have a prerelease version, got '$VERSION'"
            exit 1
          fi

      - name: Create release
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          FLAGS=""
          if [ "${{ steps.version.outputs.prerelease }}" = "true" ]; then
            FLAGS="--prerelease"
          fi

          gh release create "${{ steps.version.outputs.version }}" \
            --target "${{ inputs.branch || github.event.workflow_run.head_branch }}" \
            --title "${{ steps.version.outputs.version }}" \
            --generate-notes \
            $FLAGS