name: "Verify Velero CRDs across k8s versions"
on:
  pull_request:
    # Do not run when the change only includes these directories.
    paths-ignore:
      - "site/**"
      - "design/**"

jobs:
  # Build the Velero CLI once for all Kubernetes versions, and cache it so the fan-out workers can get it.
  build-cli:
    runs-on: ubuntu-latest
    steps:
      - name: Set up Go
        uses: actions/setup-go@v2
        with:
          go-version: 1.16
        id: go
      # Look for a CLI that's made for this PR
      - name: Fetch built CLI
        id: cache
        uses: actions/cache@v2
        env:
          cache-name: cache-velero-cli
        with:
          path: ./_output/bin/linux/amd64/velero
          # The cache key a combination of the current PR number, and a SHA256 hash of the Velero binary
          key: velero-${{ github.event.pull_request.number }}-${{ hashFiles('./_output/bin/linux/amd64/velero') }}
          # This key controls the prefixes that we'll look at in the cache to restore from
          restore-keys: |
            velero-${{ github.event.pull_request.number }}-

      - name: Fetch cached go modules
        uses: actions/cache@v2
        if: steps.cache.outputs.cache-hit != 'true'
        with:
          path: ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-

      - name: Check out the code
        uses: actions/checkout@v2
        if: steps.cache.outputs.cache-hit != 'true'

      # If no binaries were built for this PR, build it now.
      - name: Build Velero CLI
        if: steps.cache.outputs.cache-hit != 'true'
        run: |
          make local

  # Check the common CLI against all kubernetes versions
  crd-check:
    needs: build-cli
    runs-on: ubuntu-latest
    strategy:
      matrix:
        # Latest k8s versions. There's no series-based tag, nor is there a latest tag.
        k8s:
          - 1.16.15
          - 1.17.17
          - 1.18.15
          - 1.19.7
          - 1.20.2
          - 1.21.1
          - 1.22.0
    # All steps run in parallel unless otherwise specified.
    # See https://docs.github.com/en/actions/learn-github-actions/managing-complex-workflows#creating-dependent-jobs
    steps:
      - name: Fetch built CLI
        id: cache
        uses: actions/cache@v2
        env:
          cache-name: cache-velero-cli
        with:
          path: ./_output/bin/linux/amd64/velero
          # The cache key a combination of the current PR number, and a SHA256 hash of the Velero binary
          key: velero-${{ github.event.pull_request.number }}-${{ hashFiles('./_output/bin/linux/amd64/velero') }}
          # This key controls the prefixes that we'll look at in the cache to restore from
          restore-keys: |
            velero-${{ github.event.pull_request.number }}-
      - uses: engineerd/setup-kind@v0.5.0
        with:
          version: "v0.11.1"
          image: "kindest/node:v${{ matrix.k8s }}"
      - name: Install CRDs
        run: |
          kubectl cluster-info
          kubectl get pods -n kube-system
          kubectl version
          echo "current-context:" $(kubectl config current-context)
          echo "environment-kubeconfig:" ${KUBECONFIG}
          ./_output/bin/linux/amd64/velero install --crds-only --dry-run -oyaml | kubectl apply -f -