name: '[CI/CD] CI Pipeline'
on: # rebuild any PRs and main branch changes
  pull_request_target:
    types:
      - opened
      - reopened
      - synchronize
      - labeled
    branches:
      - main
      - bitnami:main
permissions:
  issues: write
  pull-requests: write
env:
  CSP_API_URL: https://console.cloud.vmware.com
  CSP_API_TOKEN: ${{ secrets.CSP_API_TESTING_TOKEN }}
  VIB_PUBLIC_URL: https://cp.bromelia.vmware.com
# Avoid concurrency over the same PR
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
jobs:
  get-chart:
    runs-on: ubuntu-latest
    name: Get modified charts
    if: ${{ github.event.pull_request.state != 'closed' }}
    outputs:
      chart: ${{ steps.get-chart.outputs.chart }}
      result: ${{ steps.get-chart.outputs.result }}
    steps:
      - name: Install dependencies
        run: sudo apt-get install -y patchutils
      - id: get-chart
        name: Get modified charts
        env:
          DIFF_URL: "${{github.event.pull_request.diff_url}}"
          TEMP_FILE: "${{runner.temp}}/pr-${{github.event.number}}.diff"
        run: |
          # This request doesn't consume API calls.
          curl -Lkso $TEMP_FILE $DIFF_URL
          files_changed="$(sed -nr 's/[\-\+]{3} [ab]\/(.*)/\1/p' $TEMP_FILE | sort | uniq)"
          # Adding || true to avoid "Process exited with code 1" errors
          charts_dirs_changed="$(echo "$files_changed" | xargs dirname | grep -o "bitnami/[^/]*" | sort | uniq || true)"
          # Using grep -c as a better alternative to wc -l when dealing with empty strings."
          num_charts_changed="$(echo "$charts_dirs_changed" | grep -c "bitnami" || true)"
          num_version_bumps="$(filterdiff -s -i "*Chart.yaml" $TEMP_FILE | grep -c "+version" || true)"
          non_readme_files=$(echo "$files_changed" | grep -vc "\.md" || true)

          if [[ "$non_readme_files" -le "0" ]]; then
            # The only changes are .md files -> SKIP
            echo "result=skip" >> $GITHUB_OUTPUT
          elif [[ "$num_charts_changed" -ne "$num_version_bumps" ]]; then
            # Changes done in charts but version not bumped -> ERROR
            charts_changed_str="$(echo ${charts_dirs_changed[@]})"
            echo "error=Detected changes in charts without version bump in Chart.yaml. Charts changed: ${num_charts_changed} ${charts_changed_str}. Version bumps detected: ${num_version_bumps}" >> $GITHUB_OUTPUT
            echo "result=fail" >> $GITHUB_OUTPUT
          elif [[ "$num_charts_changed" -eq "1" ]]; then
            # Changes done in only one chart -> OK
            chart_name=$(echo "$charts_dirs_changed" | sed "s|bitnami/||g")
            echo "chart=${chart_name}" >> $GITHUB_OUTPUT
            echo "result=ok" >> $GITHUB_OUTPUT
          elif [[ "$num_charts_changed" -le "0" ]]; then
            # Changes done in the bitnami/ folder but not inside a chart subfolder -> SKIP
            echo "error=No changes detected in charts. The rest of the tests will be skipped." >> $GITHUB_OUTPUT
            echo "result=skip" >> $GITHUB_OUTPUT
          else
            # Changes done in more than chart -> SKIP
            charts_changed_str="$(echo ${charts_dirs_changed[@]})"
            echo "error=Changes detected in more than one chart directory: ${charts_changed_str}. It is strongly advised to change only one chart in a PR. The rest of the tests will be skipped." >> $GITHUB_OUTPUT
            echo "result=skip" >> $GITHUB_OUTPUT
          fi
      # Using actions/github-scripts because using exit 1 in the script above would not provide any output
      # Source: https://github.community/t/no-output-on-process-completed-with-exit-code-1/123821/3
      - id: show-error
        name: Show error
        if: ${{ steps.get-chart.outputs.result != 'ok' }}
        uses: actions/github-script@v6
        with:
          script: |
            let message='${{ steps.get-chart.outputs.error }}';
            if ('${{ steps.get-chart.outputs.result }}' === 'fail' ) {
              core.setFailed(message);
            } else {
              core.warning(message);
            }
  vib-verify:
    runs-on: ubuntu-latest
    needs: get-chart
    # Given performance issues of the action feature on GH's side, we need to be very restrictive in the job's triggers:
    # -> The 'Get modified charts' job suceededs AND
    #  ( ---> The pipeline was triggered due to a label addition and said label was the 'verify' one OR
    #    ---> the PR already contains the 'verify' label )
    if: |
      needs.get-chart.outputs.result == 'ok' &&
      (
        contains(github.event.pull_request.labels.*.name, 'verify') || (github.event.action == 'labeled' && github.event.label.name == 'verify')
      )
    name: VIB Verify
    steps:
      - uses: actions/checkout@v3
        name: Checkout Repository
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
      - id: get-asset-vib-config
        name: Get asset-specific configuration for VIB action
        run: |
          config_file=".vib/${{ needs.get-chart.outputs.chart }}/vib-action.config"

          # Supported configuration customizations and default values
          verification_mode="PARALLEL"

          if [[ -f $config_file ]]; then
            verification_mode="$(cat $config_file | grep 'verification-mode' | cut -d'=' -f2)"
          fi
          runtime_parameters_file=""
          if [[ -f ".vib/${{ needs.get-chart.outputs.chart }}/runtime-parameters.yaml" ]]; then
            # The path is relative to the .vib folder
            runtime_parameters_file="${{ needs.get-chart.outputs.chart }}/runtime-parameters.yaml"
          fi
          echo "verification_mode=${verification_mode}" >> $GITHUB_OUTPUT
          echo "runtime_parameters_file=${runtime_parameters_file}" >> $GITHUB_OUTPUT
      - uses: vmware-labs/vmware-image-builder-action@v0
        name: Verify ${{ needs.get-chart.outputs.chart }}
        with:
          pipeline: ${{ needs.get-chart.outputs.chart }}/vib-verify.json
          verification-mode: ${{ steps.get-asset-vib-config.outputs.verification_mode }}
          runtime-parameters-file: ${{ steps.get-asset-vib-config.outputs.runtime_parameters_file }}
        env:
          # Target-Platform used by default
          VIB_ENV_TARGET_PLATFORM: ${{ secrets.VIB_ENV_TARGET_PLATFORM }}
          # Alternative Target-Platform to be used in case of incompatibilities
          VIB_ENV_ALTERNATIVE_TARGET_PLATFORM: ${{ secrets.VIB_ENV_ALTERNATIVE_TARGET_PLATFORM }}
  auto-pr-review:
    runs-on: ubuntu-latest
    needs: vib-verify
    name: Reviewal for automated PRs
    # Job to be run only when the triage for automated PRs did as well,
    # not taking into account whether 'VIB Verify' succeeded
    if: |
      always() &&
      contains(github.event.pull_request.labels.*.name, 'auto-merge') &&
      github.event.pull_request.user.login == 'bitnami-bot'
    steps:
      # Approve the CI's PR if the 'VIB Verify' job succeeded
      # Approved by the 'github-actions' user; a PR can't be approved by its author
      - name: PR approval
        if: ${{ needs.vib-verify.result == 'success' }}
        uses: hmarr/auto-approve-action@v3.0.0
        with:
          pull-request-number: ${{ github.event.number }}
      - name: Merge
        id: merge
        if: ${{ needs.vib-verify.result == 'success' }}
        uses: actions/github-script@v6
        with:
          result-encoding: string
          retries: 3
          github-token: ${{ secrets.BITNAMI_BOT_TOKEN }}
          script: |
            github.rest.pulls.merge({
              pull_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              merge_method: 'squash'
            })
      # If the CI did not succeed ('VIB Verify' failed or skipped),
      # post a comment on the PR and assign a maintainer agent to review it
      - name: Manual review required
        if: ${{ always() && (needs.vib-verify.result != 'success' || steps.merge.outcome != 'success' ) }}
        uses: peter-evans/create-or-update-comment@v3.0.0
        with:
          issue-number: ${{ github.event.number }}
          # Necessary to trigger support workflows
          token: ${{ secrets.BITNAMI_BOT_TOKEN }}
          body: |
            There has been an error during the automated release process. Manual revision is now required.
            Please check the related [action_run#${{ github.run_id }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}) for more information.