name: Lint and Test Charts

on: pull_request

jobs:
  lint-test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Install Helm
        uses: azure/setup-helm@v1
        with:
          version: v3.4.0

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

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.0.1

      - name: Run chart-testing (list-changed)
        id: list-changed
        run: |
          changed=$(ct list-changed --config .github/ct.yaml)
          if [[ -n "$changed" ]]; then
            echo "::set-output name=changed::true"
          fi

          changed_unfiltered=$(ct list-changed --config .github/ct.yaml --excluded-charts "")
          if [[ $(grep -E "^charts/common(-test)?$" <<< "$changed_unfiltered") ]]; then
            echo "::set-output name=common::true"
          fi

      - name: Run chart-testing (lint)
        id: lint
        run: ct lint --config .github/ct.yaml --excluded-charts ""
        if: steps.list-changed.outputs.common == 'true' || steps.list-changed.outputs.common == 'true'

      - name: Create kind cluster
        uses: helm/kind-action@v1.1.0
        if: steps.list-changed.outputs.changed == 'true' || steps.list-changed.outputs.common == 'true'

      - name: Run chart-testing (install)
        run: ct install --config .github/ct.yaml
        if: steps.list-changed.outputs.changed == 'true'

      - name: Run chart-testing (common-test)
        run: |
          ct install --config .github/ct.yaml --charts 'charts/common-test'
        if: steps.list-changed.outputs.common == 'true'