name: "Charts: Validate"

on:
  workflow_dispatch:
  pull_request:
    paths:
      - "charts/**"

concurrency:
  group: ${{ github.head_ref }}-validate
  # cancel-in-progress: true

jobs:
  pr-metadata:
    name: Collect PR metadata
    runs-on: ubuntu-20.04
    outputs:
      branch: ${{ steps.branch-name.outputs.current_branch }}
      isFork: ${{ github.event.pull_request.head.repo.full_name != github.repository }}
      addedOrModified: ${{ steps.filter.outputs.addedOrModified }}
      addedOrModifiedFiles: ${{ steps.filter.outputs.addedOrModified_files }}
      addedOrModifiedCharts: ${{ steps.filter-charts.outputs.addedOrModified }}
    steps:
      - name: Get branch name
        id: branch-name
        uses: tj-actions/branch-names@v5.1

      - name: Checkout
        uses: actions/checkout@v2

      - name: Collect changed files
        uses: dorny/paths-filter@v2
        id: filter
        with:
          list-files: shell
          filters: |
            addedOrModified:
              - added|modified: 'charts/**'

      - name: Collect changed charts
        if: |
          steps.filter.outputs.addedOrModified == 'true'
        id: filter-charts
        run: |
          CHARTS=()
          PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
          # Get only the chart paths
          for CHARTPATH in "${PATHS[@]}"
          do
            IFS='/' read -r -a path_parts <<< "${CHARTPATH}"
            CHARTS+=("${path_parts[1]}/${path_parts[2]}")
          done

          # Remove duplicates
          CHARTS=( `printf "%s\n" "${CHARTS[@]}" | sort -u` )
          # Set output to changed charts
          printf "::set-output name=addedOrModified::%s\n" "${CHARTS[*]}"

  generate-readme:
    name: Generate chart README files
    runs-on: ubuntu-20.04
    outputs:
      commitHash: ${{ steps.create-commit.outputs.commit_hash }}
    needs:
      - pr-metadata
    steps:
      - name: Checkout
        if: |
          needs.pr-metadata.outputs.isFork == 'true'
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Get app-token
        uses: getsentry/action-github-app-token@v1
        id: get-app-token
        if: |
          needs.pr-metadata.outputs.isFork == 'false'
        with:
          app_id: ${{ secrets.K8S_AT_HOME_APP_ID }}
          private_key: ${{ secrets.K8S_AT_HOME_APP_PRIVATE_KEY }}

      - name: Checkout with app-token
        if: |
          needs.pr-metadata.outputs.isFork == 'false'
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
          token: ${{ steps.get-app-token.outputs.token }}

      - uses: yokawasa/action-setup-kube-tools@v0.8.0
        if: |
          needs.pr-metadata.outputs.addedOrModified == 'true'
        with:
          setup-tools: |
            yq
          yq: "4.16.2"

      - name: Install helm-docs
        if: |
          needs.pr-metadata.outputs.addedOrModified == 'true'
        run: |
          wget -O /tmp/helm-docs.deb  https://github.com/k8s-at-home/helm-docs/releases/download/v0.1.1/helm-docs_0.1.1_Linux_x86_64.deb
          sudo dpkg -i /tmp/helm-docs.deb

      - name: Annotate Charts.yaml for Renovate PR's
        if: |
          needs.pr-metadata.outputs.addedOrModified == 'true' &&
          startsWith(needs.pr-metadata.outputs.branch, 'renovate/')
        run: |
          export DEFAULT_BRANCH=$(git remote show origin | awk '/HEAD branch/ {print $NF}')
          CHARTS=(${{ needs.pr-metadata.outputs.addedOrModifiedCharts }})
          for i in "${CHARTS[@]}"
          do
              IFS='/' read -r -a chart_parts <<< "$i"
              if [ -f "charts/${chart_parts[0]}"/"${chart_parts[1]}/Chart.yaml" ]; then
                ./hack/renovate-releasenotes.sh "charts/${chart_parts[0]}"/"${chart_parts[1]}"
              fi
              echo ""
          done

      - name: Generate README for changed charts
        if: |
          needs.pr-metadata.outputs.addedOrModified == 'true'
        run: |
          CHARTS=(${{ needs.pr-metadata.outputs.addedOrModifiedCharts }})
          for i in "${CHARTS[@]}"
          do
              printf "Rendering README for chart %s\n" "${i}"
              echo " ${i}"
              IFS='/' read -r -a chart_parts <<< "$i"
              if [ -f "charts/${chart_parts[0]}"/"${chart_parts[1]}/Chart.yaml" ]; then
                ./hack/gen-helm-docs.sh "${chart_parts[0]}" "${chart_parts[1]}"
              fi
              echo ""
          done

      - name: Create commit
        id: create-commit
        if: |
          needs.pr-metadata.outputs.addedOrModified == 'true'
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          file_pattern: charts/**/
          commit_message: Auto-update chart metadata and README
          commit_user_name: ${{ github.actor }}
          commit_user_email: ${{ github.actor }}@users.noreply.github.com

  changes-lint:
    name: Detect changes for linting
    runs-on: ubuntu-20.04
    outputs:
      matrix: |
        {
          "chart": ${{ steps.list-changed.outputs.charts }}
        }
      detected: ${{ steps.list-changed.outputs.detected }}
    needs:
      - pr-metadata
      - generate-readme
    if: |
      needs.generate-readme.outputs.commitHash == ''
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Set up chart-testing
      uses: helm/chart-testing-action@v2.1.0

    - name: Run chart-testing (list-changed)
      id: list-changed
      run: |
        EXCLUDED=$(yq eval -o=json '.excluded-charts // []' .github/ct-lint.yaml)
        CHARTS=$(ct list-changed --config .github/ct-lint.yaml)
        CHARTS_JSON=$(echo "${CHARTS}" | jq -R -s -c 'split("\n")[:-1]')
        OUTPUT_JSON=$(echo "{\"excluded\": ${EXCLUDED}, \"all\": ${CHARTS_JSON}}" | jq -c '.all-.excluded')
        echo ::set-output name=charts::${OUTPUT_JSON}
        if [[ $(echo ${OUTPUT_JSON} | jq -c '. | length') -gt 0 ]]; then
          echo "::set-output name=detected::true"
        fi

  changes-install:
    name: Detect changes for install
    runs-on: ubuntu-20.04
    outputs:
      matrix: |
        {
          "chart": ${{ steps.list-changed.outputs.charts }}
        }
      detected: ${{ steps.list-changed.outputs.detected }}
    needs:
      - pr-metadata
      - generate-readme
    if: |
      needs.generate-readme.outputs.commitHash == ''
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Set up chart-testing
      uses: helm/chart-testing-action@v2.1.0

    - name: Run chart-testing (list-changed)
      id: list-changed
      run: |
        EXCLUDED=$(yq eval -o=json '.excluded-charts // []' .github/ct-install.yaml)
        CHARTS=$(ct list-changed --config .github/ct-install.yaml)
        CHARTS_JSON=$(echo "${CHARTS}" | jq -R -s -c 'split("\n")[:-1]')
        OUTPUT_JSON=$(echo "{\"excluded\": ${EXCLUDED}, \"all\": ${CHARTS_JSON}}" | jq -c '.all-.excluded')
        echo ::set-output name=charts::${OUTPUT_JSON}
        if [[ $(echo ${OUTPUT_JSON} | jq -c '. | length') -gt 0 ]]; then
          echo "::set-output name=detected::true"
        fi

  lint:
    needs:
    - changes-lint
    if:
      needs.changes-lint.outputs.detected == 'true'
    name: Lint charts
    strategy:
      matrix: ${{ fromJson(needs.changes-lint.outputs.matrix) }}
      fail-fast: true
      max-parallel: 15
    runs-on: ubuntu-20.04
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Install Helm
      uses: azure/setup-helm@v1
      with:
        version: v3.6.3

    - uses: actions/setup-python@v2
      with:
        python-version: 3.7

    - name: Set up chart-testing
      uses: helm/chart-testing-action@v2.1.0

    - name: Run chart-testing (lint)
      id: lint
      run: ct lint --config .github/ct-lint.yaml --charts ${{ matrix.chart }}

  # Summarize matrix https://github.community/t/status-check-for-a-matrix-jobs/127354/7
  lint_success:
    needs:
    - lint
    if: ${{ always() }}
    name: Lint successful
    runs-on: ubuntu-20.04
    steps:
    - name: Check lint matrix status
      if: ${{ needs.changes-lint.outputs.detected == 'true' && needs.lint.result != 'success' }}
      run: exit 1

  unittest:
    needs:
    - lint_success
    name: Run unit tests
    runs-on: ubuntu-20.04
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Install Dev tools
      run: sudo apt-get update && sudo apt-get install -y jq libjq-dev

    - name: Install Helm
      uses: azure/setup-helm@v1
      with:
        version: v3.6.3

    - name: Install Ruby
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.7

    - name: Install dependencies
      env:
        RUBYJQ_USE_SYSTEM_LIBRARIES: 1
      run: |
        bundle install

    - name: Run tests
      run: |
        bundle exec m -r ./test/

  install:
    needs:
    - changes-install
    - lint_success
    if:
      needs.changes-install.outputs.detected == 'true'
    name: Install charts
    strategy:
      matrix: ${{ fromJson(needs.changes-install.outputs.matrix) }}
      fail-fast: true
      max-parallel: 15
    runs-on: ubuntu-20.04
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 0

    - name: Install Helm
      uses: azure/setup-helm@v1
      with:
        version: v3.6.3

    - uses: actions/setup-python@v2
      with:
        python-version: 3.7

    - name: Set up chart-testing
      uses: helm/chart-testing-action@v2.1.0

    - name: Create k3d cluster
      uses: nolar/setup-k3d-k3s@v1
      with:
        version: v1.19

    - name: Remove node taints
      run: |
        kubectl taint --all=true nodes node.cloudprovider.kubernetes.io/uninitialized- || true

    - name: Run chart-testing (install)
      run: ct install --config .github/ct-install.yaml --charts ${{ matrix.chart }}

  # Summarize matrix https://github.community/t/status-check-for-a-matrix-jobs/127354/7
  install_success:
    needs:
    - changes-install
    - install
    if: ${{ always() }}
    name: Install successful
    runs-on: ubuntu-20.04
    steps:
    - name: Check install matrix status
      if: ${{ needs.changes-install.outputs.detected == 'true' && needs.install.result != 'success' }}
      run: exit 1