auto-tag-on-merge.yaml

name: Release Chart on PR Merge

on:
  pull_request:
    types: [closed]
    branches: [main]

jobs:
  trigger-release:
    name: Tag and Release Chart
    if: |
      github.event.pull_request.merged == true &&
      contains(github.event.pull_request.labels.*.name, 'chart-update')
    runs-on: ubuntu-latest
    permissions:
      contents: write  # Required to push tags
      actions: write   # Required to dispatch workflow_dispatch

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Extract chart info from PR
        id: extract
        run: |
          PR_BRANCH="${{ github.event.pull_request.head.ref }}"

          # Extract chart name and version from branch name
          # Format: update-{chart-name}-{version}
          if [[ "$PR_BRANCH" =~ ^update-([a-zA-Z0-9-]+)-([0-9]+\.[0-9]+\.[0-9]+)$ ]]; then
            CHART_NAME="${BASH_REMATCH[1]}"
            VERSION="${BASH_REMATCH[2]}"
            echo "chart_name=$CHART_NAME" >> $GITHUB_OUTPUT
            echo "version=$VERSION" >> $GITHUB_OUTPUT
            echo "Chart: $CHART_NAME"
            echo "Version: $VERSION"
          else
            echo "::error::Could not parse chart info from branch: $PR_BRANCH"
            exit 1
          fi

      - name: Verify chart version in Chart.yaml
        run: |
          CHART_NAME="${{ steps.extract.outputs.chart_name }}"
          EXPECTED="${{ steps.extract.outputs.version }}"
          CHART_VERSION=$(yq '.version' "./charts/$CHART_NAME/Chart.yaml")

          if [ "$CHART_VERSION" != "$EXPECTED" ]; then
            echo "::error::Chart.yaml version ($CHART_VERSION) does not match expected ($EXPECTED)"
            exit 1
          fi
          echo "Chart.yaml version matches: $CHART_VERSION"

      - name: Create release tag
        run: |
          TAG_NAME="${{ steps.extract.outputs.chart_name }}-v${{ steps.extract.outputs.version }}"

          if git rev-parse "$TAG_NAME" >/dev/null 2>&1; then
            echo "Tag $TAG_NAME already exists, skipping tag creation"
          else
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"

            git tag -a "$TAG_NAME" -m "Release ${{ steps.extract.outputs.chart_name }} v${{ steps.extract.outputs.version }}

          Chart version: ${{ steps.extract.outputs.version }}
          Automated release from PR #${{ github.event.pull_request.number }}"

            # Push with GITHUB_TOKEN — tag won't trigger other workflows,
            # but that's fine since we dispatch helm-release.yaml explicitly below.
            git push origin "$TAG_NAME"
            echo "Created tag: $TAG_NAME"
          fi

      - name: Trigger chart release workflow
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          CHART="${{ steps.extract.outputs.chart_name }}"
          VERSION="v${{ steps.extract.outputs.version }}"

          echo "Dispatching helm-release.yaml for $CHART $VERSION..."
          gh workflow run helm-release.yaml \
            --field chart="$CHART" \
            --field version="$VERSION"

          echo "Dispatched release workflow for $CHART $VERSION"
          echo "Monitor: https://github.com/${{ github.repository }}/actions/workflows/helm-release.yaml"