ci-cd.yaml

# This workflow:
#   - lints the chart, runs tests and verifies documentation is up to date
# Additionally if the event isn't a pull-request (and hence a merge/push to main):
#   - sync README to gh-pages branch
#   - release a new chart version if the version isn't already released
name: CI/CD

on:
  push:
    branches:
      - main
  pull_request:

# Cancel previous PR builds.
concurrency:
  # Cancel all workflow runs except latest within a concurrency group. This is achieved by defining a concurrency group for the PR.
  # Non-PR builds have singleton concurrency groups.
  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.event.number || github.sha }}
  cancel-in-progress: true

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.0.1
      - name: Lint charts
        run: ct lint --charts=charts/trino --validate-maintainers=false

  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Set up Helm
        uses: azure/setup-helm@v1
        with:
          version: v3.4.0
      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.0.1
      - name: Create kind cluster
        uses: helm/kind-action@v1.2.0
      - name: Install charts
        run: ct install --charts=charts/trino

  docs:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
        with:
          python-version: '3.x'
      - name: Install Frigate
        run: pip install frigate
      - name: Check if chart README is in-sync
        run: |
          frigate gen charts/trino > charts/trino/README.md
          if ! git diff --exit-code --quiet; then
            cat << 'EOF'
          charts/trino/README.md is not in sync with chart
          Please update charts/trino/README.md by running:
              python3 -m venv .venv && . .venv/bin/activate
              pip install frigate
              frigate gen charts/trino > charts/trino/README.md

          Here's a diff of what's changed:
          EOF

            git diff
            # fail the job
            exit 1
          else
            echo "charts/trino/README.md is in-sync with chart"
          fi

  # Everything above is CI, everything here and below is for releases and runs only on non-pull-request events
  sync-readme:
    needs: [lint, test, docs]
    runs-on: ubuntu-latest
    if: github.event_name != 'pull_request'
    steps:
      - name: Checkout main
        uses: actions/checkout@v2
        with:
          path: main
      - name: Checkout gh-pages
        uses: actions/checkout@v2
        with:
          ref: gh-pages
          path: gh-pages
      - name: Copy all README files from main to gh-pages
        run: |
          cd main
          # cp --parents preserves directory structure
          find . -name 'README.md' -exec cp --parents '{}' "../gh-pages/" ';'
      - name: Commit changes to gh-pages and push
        run: |
          cd gh-pages
          git add .
          git config user.name "GITHUB_ACTOR"
          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
          # Commit only if changes exist to avoid failure in this step
          git diff-index --quiet HEAD || git commit --signoff -m "Sync READMEs from main"
          git push

  release:
    needs: [lint, test, docs, sync-readme]
    runs-on: ubuntu-latest
    if: github.event_name != 'pull_request'
    steps:
      - uses: actions/checkout@v2
        with:
          # history is required to generate changelog
          fetch-depth: 0
      - name: Configure Git
        run: |
          git config user.name "$GITHUB_ACTOR"
          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
      - name: Build release changelog
        id: github_release
        uses: mikepenz/release-changelog-builder-action@v2.9.0
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          configuration: '.github/changelog-config.json'
          outputFile: ${{ runner.temp }}/CHANGELOG.md
      - name: Inspect changelog
        run: cat ${{ runner.temp }}/CHANGELOG.md
      - name: Release charts
        uses: helm/chart-releaser-action@v1.3.0
        env:
          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
          CR_RELEASE_NOTES_FILE: ${{ runner.temp }}/CHANGELOG.md
          # If we didn't bump the chart version then we can skip the release
          CR_SKIP_EXISTING: true