release.yml

name: release

on:
  workflow_dispatch:
    inputs:
      branch:
        description: 'Branch to release from'
        required: false
        default: master
        type: string
      version_bump:
        description: 'Version component to bump'
        required: false
        default: patch
        type: choice
        options:
          - patch
          - minor
          - major

concurrency:
  group: publish-ghpages-${{ github.repository }}
  cancel-in-progress: false

permissions:
  contents: write

jobs:
  create_tag:
    runs-on: ubuntu-24.04
    environment: release
    outputs:
      tag: ${{ steps.version.outputs.tag }}
      snapshot_sha: ${{ steps.snapshot.outputs.sha }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
        with:
          ref: ${{ inputs.branch }}
          fetch-depth: 0

      - name: Compute next version
        id: version
        run: |
          LATEST=$(git tag --list 'v*' --sort=-version:refname | head -1)
          if [ -z "$LATEST" ]; then
            LATEST="v0.0.0"
          fi
          VERSION="${LATEST#v}"
          MAJOR=$(echo "$VERSION" | cut -d. -f1)
          MINOR=$(echo "$VERSION" | cut -d. -f2)
          PATCH=$(echo "$VERSION" | cut -d. -f3)
          case "${{ inputs.version_bump }}" in
            major) MAJOR=$((MAJOR+1)); MINOR=0; PATCH=0 ;;
            minor) MINOR=$((MINOR+1)); PATCH=0 ;;
            patch) PATCH=$((PATCH+1)) ;;
          esac
          NEW_TAG="v${MAJOR}.${MINOR}.${PATCH}"
          echo "tag=$NEW_TAG" >> "$GITHUB_OUTPUT"
          echo "Previous version $LATEST → next version $NEW_TAG"

      - name: Set snapshot SHA
        id: snapshot
        run: echo "sha=$(git rev-parse --short=8 HEAD)" >> "$GITHUB_OUTPUT"

      - name: Check out gh-pages branch
        id: checkout-gh-pages
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
        with:
          ref: gh-pages
          path: gh-pages
          fetch-depth: 1
        continue-on-error: true

      - name: Verify snapshot exists for release
        run: |
          SHA="${{ steps.snapshot.outputs.sha }}"
          if [ "${{ steps.checkout-gh-pages.outcome }}" != "success" ]; then
            echo "::error::gh-pages branch does not exist; no snapshot available for commit $SHA"
            exit 1
          fi
          if [ ! -d "gh-pages/p2/snapshots/$SHA" ]; then
            echo "::error::No snapshot found for commit $SHA in p2/snapshots/; the commit must be built and deployed as a snapshot before releasing"
            exit 1
          fi
          echo "Found snapshot for commit $SHA"

      - name: Create and push tag
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          echo "Bumping to ${{ steps.version.outputs.tag }}"
          git tag "${{ steps.version.outputs.tag }}"
          git push origin "${{ steps.version.outputs.tag }}"

  publish:
    needs: create_tag
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
        with:
          ref: ${{ needs.create_tag.outputs.tag }}
          fetch-depth: 0

      - name: Check out gh-pages branch
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
        with:
          ref: gh-pages
          path: gh-pages
          fetch-depth: 1

      - name: Publish p2 release to gh-pages
        run: bash .github/scripts/publish-p2-ghpages.sh
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          RELEASE_VERSION: ${{ needs.create_tag.outputs.tag }}
          SNAPSHOT_SHA: ${{ needs.create_tag.outputs.snapshot_sha }}

      - name: Create release with p2 update site
        run: |
          RELEASE_VERSION="${{ needs.create_tag.outputs.tag }}"
          SNAPSHOT_SHA="${{ needs.create_tag.outputs.snapshot_sha }}"
          mkdir -p release-staging/repository
          cp -r "gh-pages/p2/snapshots/$SNAPSHOT_SHA/." release-staging/repository/
          cd release-staging
          zip -r p2-update-site.zip repository/
          gh release create "$RELEASE_VERSION" \
            p2-update-site.zip \
            --generate-notes \
            --title "Release ${RELEASE_VERSION#v}"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Summary
        run: |
          TAG="${{ needs.create_tag.outputs.tag }}"
          REPO="${{ github.server_url }}/${{ github.repository }}"
          echo "::notice::Created release $TAG from branch ${{ inputs.branch }}"
          {
            echo "## Release created"
            echo ""
            echo "| | |"
            echo "|---|---|"
            echo "| **Tag** | [$TAG]($REPO/releases/tag/$TAG) |"
            echo "| **Branch** | \`${{ inputs.branch }}\` |"
            echo "| **Bump** | \`${{ inputs.version_bump }}\` |"
          } >> "$GITHUB_STEP_SUMMARY"

# Release workflow:
#   Snapshots:  every push to master or v[0-9]* branches → see snapshot.yml
#   Release:    workflow_dispatch → create tag, promote snapshot to p2/releases/<version>/
#
# p2 repository URLs (GitHub Pages):
#   Latest snapshot: https://dsldevkit.github.io/dsl-devkit/p2/snapshots/latest/
#   Pinned snapshot: https://dsldevkit.github.io/dsl-devkit/p2/snapshots/<sha>/
#   Latest release:  https://dsldevkit.github.io/dsl-devkit/p2/releases/latest/
#   Pinned release:  https://dsldevkit.github.io/dsl-devkit/p2/releases/{version}/