name: "Charts: Lint"

on:
  workflow_call:
    inputs:
      checkoutCommit:
        required: true
        type: string
      chartChanges:
        required: true
        type: string

env:
  HELM_VERSION: 3.9.2

jobs:
  generate-lint-matrix:
    name: Generate matrix for linting
    runs-on: ubuntu-22.04
    outputs:
      lint-matrix: |
        {
          "chart": ${{ steps.list-changed.outputs.charts }}
        }
      detected: ${{ steps.list-changed.outputs.detected }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
          ref: ${{ inputs.checkoutCommit }}

      - name: Run chart-testing (list-changed)
        id: list-changed
        if: inputs.chartChanges != ''
        run: |
          EXCLUDED=$(yq -o json eval '.excluded-charts-lint' .ci/ct/ct.yaml)
          CHARTS_JSON=$(yq --null-input -o json eval '"${{ inputs.chartChanges }}" | split(" ")')
          OUTPUT_JSON=$(yq --null-input -o json eval "$CHARTS_JSON - $EXCLUDED")
          echo ::set-output name=charts::${OUTPUT_JSON}
          if [[ $(echo ${OUTPUT_JSON} | jq -c '. | length') -gt 0 ]]; then
            echo "::set-output name=detected::true"
          fi

  lint-charts:
    needs:
      - generate-lint-matrix
    if: needs.generate-lint-matrix.outputs.detected == 'true'
    name: Lint charts
    strategy:
      matrix: ${{ fromJson(needs.generate-lint-matrix.outputs.lint-matrix) }}
      fail-fast: false
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
          ref: ${{ inputs.checkoutCommit }}

      - name: Install Kubernetes tools
        uses: yokawasa/action-setup-kube-tools@v0.8.2
        with:
          setup-tools: |
            helmv3
          helm: "${{ env.HELM_VERSION }}"

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.2.1

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

  # Summarize matrix https://github.community/t/status-check-for-a-matrix-jobs/127354/7
  lint_success:
    needs:
      - generate-lint-matrix
      - lint-charts
    if: |
      always()
    name: Lint successful
    runs-on: ubuntu-22.04
    steps:
      - name: Check lint matrix status
        if: ${{ (needs.generate-lint-matrix.outputs.detected == 'true') && (needs.lint-charts.result != 'success') }}
        run: exit 1