mercury_bot.yml

name: OWNERS PR Check

# Checks OWNERS file additions and modifications submitted by mercury-bot on a
# partner's behalf, typically in response to a partner updating their project
# metadata.
#
# Automatically approves modifications mercury-bot makes. Sanity checks
# net-new OWNERS files to ensure their addition does not conflict with
# existing locks.

on:
  pull_request_target:
    types: [opened, synchronize, reopened, edited, ready_for_review, labeled]
    paths:
    - charts/partners/**/OWNERS


jobs:
  owners-file-check:
    name: OWNERS file PR checker
    runs-on: ubuntu-20.04
    if: github.event.pull_request.draft == false && github.actor == 'redhat-mercury-bot'
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        
      - name: Set up Python 3.x Part 1
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"

      - name: Set up Python 3.x Part 2
        run: |
          # set up python
          python3 -m venv ve1
          cd scripts
          ../ve1/bin/pip3 install -r requirements.txt
          ../ve1/bin/pip3 install .
          cd ..

      - name: get files changed
        id: get_files_changed
        env:
          BOT_TOKEN: ${{ secrets.BOT_TOKEN }}
        run: |
          # get files in PR
          ./ve1/bin/pr-artifact --api-url=${{ github.event.pull_request._links.self.href }} \
                                --get-files

      - name: check if only an OWNERS file is pushed
        id: check_for_owners
        env:
          pr_files_py: "${{ steps.get_files_changed.outputs.pr_files }}"
        run: |
          # check if PR contains just one partner OWNERS file
          pr_files=($(echo "$pr_files_py" | tr -d '[],'))
          echo "Files in PR: ${pr_files[@]}"
          eval first_file=${pr_files[0]}
          if [ ${#pr_files[@]} == 1 ]; then
            eval first_file=${pr_files[0]}
            if [[ $first_file == "charts/partners/"*/*"/OWNERS" ]] ; then
                echo "An OWNERS file has been modified or added"
                echo "merge_pr=true" | tee -a $GITHUB_OUTPUT
            else
              echo "The file in the PR is not a partner OWNERS file"
              echo "merge_pr=false" | tee -a $GITHUB_OUTPUT
              echo "msg=ERROR: PR does not include a partner OWNERS file." >> $GITHUB_OUTPUT
            fi
          else
            echo "The PR contains multiple files."
            echo "msg=ERROR: PR contains multiple files." >> $GITHUB_OUTPUT
            echo "merge_pr=false" | tee -a $GITHUB_OUTPUT
          fi

      # We know that only one file was modified at this point, and it seems
      # mergeable. Determine if that file was created or modified here.
      #
      # This step only checks the first file for its modification type!
      - name: Determine if net-new OWNERS file
        id: populate-file-mod-type
        if: ${{ steps.check_for_owners.outputs.merge_pr == 'true' }}
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const resp = await github.rest.pulls.listFiles({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number,
            });
            const ownersFile = resp.data[0];
            console.log(`Modified file "${ownersFile.filename} has a status of ${ownersFile.status}`);
            console.log(`setting output: net-new-owners-file=${ownersFile.status == 'added'}`);
            core.setOutput('net-new-owners-file', ownersFile.status == 'added');

      - name: Add category/organization/chart-name from modified file to GITHUB_OUTPUT
        id: gather-metadata
        env:
          API_URL: ${{ github.event.pull_request._links.self.href }}
          BOT_TOKEN: ${{ secrets.BOT_TOKEN }}
        run: |
          ./ve1/bin/extract-metadata-from-pr \
            --emit-to-github-output \
            ${{ env.API_URL }}

      # Only used to assert content of the OWNERS file.
      - name: Checkout Pull Request
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
          token: ${{ secrets.BOT_TOKEN }}
          fetch-depth: 0
          path: "pr-branch"

      # TODO: Implemented as a shell script temporarily. Future enhancement
      # would re-use some existing logic that we have for the Red Hat OWNERS
      # check, and build something similar for general use.
      - name: Ensure OWNERS content and path content align
        working-directory: "pr-branch"
        id: fact-check
        run: |
          file=$(echo ${{ steps.get_files_changed.outputs.pr_files }} | yq .0)
          owner_contents_chart_name=$(yq '.chart.name' ${file})
          owner_contents_vendor_label=$(yq '.vendor.label' ${file})
          echo "Chart Name Comparison: ${owner_contents_chart_name} = ${{ steps.gather-metadata.outputs.chart-name }}"
          echo "Vendor Label Comparison: ${owner_contents_vendor_label} = ${{ steps.gather-metadata.outputs.organization }}"
          test "${owner_contents_chart_name}" = "${{ steps.gather-metadata.outputs.chart-name }}"
          test "${owner_contents_vendor_label}" = "${{ steps.gather-metadata.outputs.organization }}"

      - name: Comment on PR if facts are mismatched
        id: comment-if-fact-check-failure
        if: failure() && steps.fact-check.outcome == 'failure'
        run: |
          gh pr comment ${{ github.event.number }} --body "${{ env.COMMENT_BODY }}"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          COMMENT_BODY: |
            ### Submission Facts Mismatch

            The content of the OWNERS file and your submission path do not seem to match. Double check that
            your vendor label and chart name values in your OWNERS file match with your submission path.

            _This comment was auto-generated by [GitHub Actions](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})._

      - name: Check if chart name is locked
        id: determine-lock-status
        uses: ./.github/actions/check-chart-locks
        with:
          chart-name: ${{ steps.gather-metadata.outputs.chart-name }}
          fail-workflow-if-locked: 'false'

      # Do not merge net-new OWNERS files for locked chart names. Allow a
      # modification to an existing file. The mercury-bot periodically updates
      # this file as users make changes to their project settings.
      - name: Determine if should merge and is safe to merge
        id: safe-to-merge
        run: |
          echo "OWNERS file is net new: ${{ steps.populate-file-mod-type.outputs.net-new-owners-file }}"
          echo "Chart name is already locked: ${{ steps.determine-lock-status.outputs.chart-is-locked }}"
          echo "merge_pr=${{ steps.populate-file-mod-type.outputs.net-new-owners-file == 'false' || (steps.populate-file-mod-type.outputs.net-new-owners-file == 'true' && steps.determine-lock-status.outputs.chart-is-locked == 'false') }}" | tee -a $GITHUB_OUTPUT

      - name: Comment on PR
        if: ${{ steps.check_for_owners.outputs.merge_pr == 'false' }}
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
              var issue_number = ${{ github.event.number }};
              var comment = "${{ steps.check_for_owners.outputs.msg }}";
              github.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: Number(issue_number),
                body: comment
              });

      - name: Reflect on check for OWNERS file result
        if: |
          steps.check_for_owners.outputs.merge_pr == 'false'
          || steps.safe-to-merge.outputs.merge_pr == 'false'
        run: |
          echo "::error: The PR was not for a single partner OWNERS file, or was for a chart name locked to another contributor"
          exit 1

      - name: Approve PR
        id: approve_pr
        if: |
          steps.check_for_owners.outputs.merge_pr == 'true'
          && steps.safe-to-merge.outputs.merge_pr == 'true'
        uses: hmarr/auto-approve-action@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Merge PR
        id: merge_pr
        if: ${{ steps.approve_pr.conclusion == 'success' }}
        uses: pascalgn/automerge-action@v0.16.2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          MERGE_METHOD: squash
          MERGE_LABELS: ""