publish_release.yml

name: Publish Release

on:
  workflow_dispatch:
    inputs:
      prerelease:
        type: boolean
        description: "Prerelease"
        # Whether to create a prerelease or proper release
        default: true
        required: true
      swift_syntax_version:
        type: string
        default: 601.0.0
        description: "swift-syntax version"
        # The version of swift-syntax to tag. If this is a prerelease, `-prerelease-<date>` is added to this version.
        required: true

jobs:
  check_triggering_actor:
    name: Check user is allowed to create release
    # Only a single user should be allowed to create releases to avoid two people triggering the creation of a release
    # at the same time. If the release manager changes between users, update this condition.
    runs-on: ubuntu-latest
    steps:
      - run: |
          if [[ "${{ github.triggering_actor }}" != "ahoppen" ]]; then
            echo "${{ github.triggering_actor }} is not allowed to create a release"
            exit 1
          fi
  # test:
  #   name: Test in ${{ matrix.release && 'Release' || 'Debug' }} configuration
  #   uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       release: [true, false]
  #   with:
  #     # We require that releases of swift-syntax build without warnings
  #     linux_build_command: swift test -Xswiftc -warnings-as-errors ${{ matrix.release && '-c release' || '' }}
  #     windows_build_command: swift test -Xswiftc -warnings-as-errors ${{ matrix.release && '-c release' || '' }}
  create_tag:
    name: Create Tag
    runs-on: ubuntu-latest
    needs: [check_triggering_actor]
    permissions:
      contents: write
    outputs:
      swift_syntax_version: ${{ steps.swift_syntax_version.outputs.swift_syntax_version }}
    steps:
      - name: Determine tag name
        id: swift_syntax_version
        run: |
          if [[ "${{ github.event.inputs.prerelease }}" == "false" ]]; then
            SWIFT_SYNTAX_VERSION="${{ github.event.inputs.swift_syntax_version }}"
          else
            SWIFT_SYNTAX_VERSION="${{ github.event.inputs.swift_syntax_version }}-prerelease-$(date +'%Y-%m-%d')"
          fi
          echo "Using swift-syntax version: $SWIFT_SYNTAX_VERSION"
          echo "swift_syntax_version=$SWIFT_SYNTAX_VERSION" >> "$GITHUB_OUTPUT"
      - name: Checkout repository
        uses: actions/checkout@v4
      - name: Tag release
        run: |
          git tag "${{ steps.swift_syntax_version.outputs.swift_syntax_version }}"
          git push origin "${{ steps.swift_syntax_version.outputs.swift_syntax_version }}"
  create_release:
    name: Create release on GitHub
    runs-on: ubuntu-latest
    needs: [create_tag]
    # Only create a release automatically for prereleases. For real releases, release notes should be crafted by hand.
    if: ${{ github.event.inputs.prerelease }}
    permissions:
      contents: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
      - name: Create release
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh release create "${{ needs.create_tag.outputs.swift_syntax_version }}" \
            --title "${{ needs.create_tag.outputs.swift_syntax_version }}" \
            --prerelease