name: Lint and Test Charts

on:
  pull_request:
    branches:
      - master
    paths:
      - "charts/**"

jobs:
  lint:
    runs-on: ubuntu-20.04
    container: quay.io/helmpack/chart-testing:v3.4.0
    steps:
      - name: Install helm-docs
        working-directory: /tmp
        env:
          HELM_DOCS_URL: https://github.com/norwoodj/helm-docs/releases/download/v1.5.0/helm-docs_1.5.0_Linux_x86_64.tar.gz
        run: |
          curl -LSs $HELM_DOCS_URL | tar xz && \
          mv ./helm-docs /usr/local/bin/helm-docs && \
          chmod +x /usr/local/bin/helm-docs && \
          helm-docs --version

      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Check if documentation is up-to-date
        run: helm-docs && git diff --exit-code HEAD

      - name: Run chart-testing (lint)
        run: ct lint --config .github/ct/config.yaml

  test:
    runs-on: ubuntu-20.04
    needs:
      - lint
    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: |
          changed=$(ct list-changed --config .github/ct/config.yaml)
          if [[ -n "$changed" ]]; then
            echo "::set-output name=changed::true"
          fi

      - name: Create k8s Kind Cluster
        uses: helm/kind-action@v1.2.0
        if: steps.list-changed.outputs.changed == 'true'

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