Helix-ELR-Trigger.yml

name: Scheduled ELR Release

on:
  schedule:
    # Runs daily at 06:00 UTC
    - cron: '0 6 * * *'
  workflow_dispatch:
    inputs:
      dry_run:
        description: 'Dry run — skip branch creation, dev bump, and ELR dispatch'
        required: false
        default: 'false'
        type: boolean

permissions:
  contents: write

jobs:
  create-release-and-trigger-elr:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout dev
        uses: actions/checkout@v3
        with:
          ref: dev
          fetch-depth: 0
          token: ${{ secrets.ELR_TRIGGER_PAT }}

      - name: Fetch all remote branches
        run: git fetch --all

      - name: Set up JDK 11
        uses: actions/setup-java@v3
        with:
          java-version: '11'
          distribution: 'temurin'

      # ── 1. Read version from dev pom.xml ──────────────────────────────────
      - name: Derive versions
        id: version
        run: |
          SNAPSHOT_VERSION=$(mvn help:evaluate -Dexpression=revision -q -DforceStdout)
          BASE_VERSION=${SNAPSHOT_VERSION%-SNAPSHOT}

          MAJOR=$(echo "$BASE_VERSION" | cut -d. -f1)
          MINOR=$(echo "$BASE_VERSION" | cut -d. -f2)
          PATCH=$(echo "$BASE_VERSION" | cut -d. -f3)
          NEXT_PATCH="${MAJOR}.${MINOR}.$((PATCH + 1))"

          TIMESTAMP=$(date +%Y%m%d%H%M)
          RELEASE_VERSION="${NEXT_PATCH}-dev-${TIMESTAMP}"   # e.g. 1.4.6-dev-202503271030
          RELEASE_BRANCH="release_${RELEASE_VERSION}"        # e.g. release_1.4.6-dev-202503271030
          NEXT_DEV_VERSION="${NEXT_PATCH}-SNAPSHOT"          # e.g. 1.4.6-SNAPSHOT

          echo "base_version=$BASE_VERSION"             >> "$GITHUB_OUTPUT"
          echo "next_patch=$NEXT_PATCH"                 >> "$GITHUB_OUTPUT"
          echo "release_version=$RELEASE_VERSION"       >> "$GITHUB_OUTPUT"
          echo "release_branch=$RELEASE_BRANCH"         >> "$GITHUB_OUTPUT"
          echo "next_dev_version=$NEXT_DEV_VERSION"     >> "$GITHUB_OUTPUT"

          echo "Base: $BASE_VERSION | Release: $RELEASE_VERSION | Next dev: $NEXT_DEV_VERSION"

      # ── 2. Check if there are new commits on dev vs latest release branch ──
      - name: Check for new changes
        id: changes
        run: |
          BASE_VERSION="${{ steps.version.outputs.base_version }}"

          # Look for existing release branches for the current base version
          LATEST_RELEASE_BRANCH=$(git branch -r --list "origin/release_${BASE_VERSION}-dev-*" \
            | sed 's|origin/||' \
            | tr -d ' ' \
            | sort | tail -n 1)

          echo "Latest release branch found: '$LATEST_RELEASE_BRANCH'"

          if [ -z "$LATEST_RELEASE_BRANCH" ]; then
            echo "No prior release branch found — will create first release."
            echo "has_changes=true" >> "$GITHUB_OUTPUT"
          else
            COMMIT_COUNT=$(git rev-list --count "origin/${LATEST_RELEASE_BRANCH}..origin/dev")
            echo "New commits since $LATEST_RELEASE_BRANCH: $COMMIT_COUNT"
            if [ "$COMMIT_COUNT" -gt 0 ]; then
              echo "has_changes=true"  >> "$GITHUB_OUTPUT"
            else
              echo "has_changes=false" >> "$GITHUB_OUTPUT"
            fi
          fi

      # ── 3. Skip if nothing new ─────────────────────────────────────────────
      - name: No changes — skip release
        if: steps.changes.outputs.has_changes != 'true'
        run: |
          echo "No new commits on dev since the last release branch. Skipping release."
          exit 0

      # ── 4. Bump dev pom.xml to next SNAPSHOT ──────────────────────────────
      #       Must happen before cutting the release branch so this commit lands
      #       on both dev and the release branch — future comparisons won't
      #       count the pom bump as a new change.
      - name: Bump dev to next SNAPSHOT
        if: steps.changes.outputs.has_changes == 'true' && inputs.dry_run != 'true'
        run: |
          git config user.name  "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          git pull origin dev
          mvn versions:set-property \
            -Dproperty=revision \
            -DnewVersion="${{ steps.version.outputs.next_dev_version }}" \
            -DgenerateBackupPoms=false
          git add -A
          git commit -m "chore: bump dev to ${{ steps.version.outputs.next_dev_version }}"
          git push origin dev

      # ── 5. Cut release branch from dev ────────────────────────────────────
      - name: Create release branch
        if: steps.changes.outputs.has_changes == 'true' && inputs.dry_run != 'true'
        run: |
          git checkout -b "${{ steps.version.outputs.release_branch }}"
          git push origin "${{ steps.version.outputs.release_branch }}"

      # ── 6. Trigger ELR publish ─────────────────────────────────────────────
      - name: Dispatch ELR publish workflow
        if: steps.changes.outputs.has_changes == 'true' && inputs.dry_run != 'true'
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.ELR_TRIGGER_PAT }}
          script: |
            const branch  = '${{ steps.version.outputs.release_branch }}';
            const version = '${{ steps.version.outputs.release_version }}';
            console.log(`Triggering ELR for branch: ${branch}, version: ${version}`);
            await github.rest.actions.createWorkflowDispatch({
              owner: 'linkedin',
              repo:  'helix-elr',
              workflow_id: 'publish-linkedin-jfrog.yml',
              ref:   'helix-elr-main',
              inputs: {
                version:             version,
                branch:              branch,
                repo:                'linkedin/helix',
                jdk_build_version:   '11',
                jdk_release_version: '11',
              }
            });
            console.log('ELR workflow dispatch triggered successfully.');