testing-needed.yml

name: testing-needed

on:
  pull_request_target:
    types:
      - synchronize
      - opened
      - reopened
      - labeled
      - unlabeled

jobs:
  verify-change:
    runs-on: ubuntu-latest
    outputs:
      label_names: ${{ steps.update-label.outputs.label_names }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          # The pull_request_target event runs in the context of the PR's BASE.
          # We need to checkout the PR's HEAD to be able to check the diff.
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0
      - name: Check diff
        id: check-diff
        run: |
          loc=$(git diff --shortstat HEAD ${{ github.sha }} | awk '{print $4+$6}')
          echo "Lines of change: $loc"
          echo "lines_of_change=$loc" >> $GITHUB_OUTPUT
      - name: Update label
        id: update-label
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          # TODO: Add testing-needed-e2e-full label once the internal pipeline
          # supports running e2e-full tests with the VM-Operator build from PR.
          script: |
            if (${{ steps.check-diff.outputs.lines_of_change > 99 }}) {
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                labels: ['testing-needed-e2e-fast']
              })
            } else {
              try {
                await github.rest.issues.removeLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  name: 'testing-needed-e2e-fast'
                })
              } catch (e) {
                if (e.status !== 404) {
                  throw e
                }
              }
            }

            const labels = await github.rest.issues.listLabelsOnIssue({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number
            })
            const label_names = labels.data.map(label => label.name)
            core.info('Current label names: ' + label_names)
            core.setOutput('label_names', label_names)

  check-label:
    strategy:
      matrix:
        # the types of tests that are expressed as labels, ex. for the test
        # type "e2e-fast", the labels would be testing-needed-e2e-fast and
        # testing-done-e2e-fast
        test-type:
          - e2e-fast
          - e2e-full
    runs-on: ubuntu-latest
    needs: verify-change
    steps:
      - name: do-not-merge
        env:
          LABEL_NAMES: ${{ needs.verify-change.outputs.label_names }}
        # This step will run if one of the labels is present and the related
        # label indicating testing is done is not present, ex. the label
        # testing-needed-e2e-fast is present without also testing-done-e2e-fast.
        # Additionally, it should never run if testing-done-e2e-full is present.
        if: |
          contains(env.LABEL_NAMES, format('testing-needed-{0}', matrix.test-type)) &&
          !contains(env.LABEL_NAMES, format('testing-done-{0}', matrix.test-type)) &&
          !contains(env.LABEL_NAMES, 'testing-done-e2e-full')
        run: |
          echo "Pull request is labeled as 'testing-needed-${{ matrix.test-type }}'"
          exit 1