fleet-label.yml

name: Fleet Label PR
on:
  pull_request:
    types: [opened, edited, synchronize]

permissions:
  pull-requests: write
  issues: read

jobs:
  label_pr:
    runs-on: ubuntu-latest
    steps:
      - name: Check linked issue and apply label/milestone
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PR_URL: ${{ github.event.pull_request.html_url }}
          REPO: ${{ github.repository }}
        run: |
          # Use GitHub's own closing keyword resolution to find linked issues
          ISSUE_NUMBER=$(gh pr view "$PR_URL" --json closingIssuesReferences --jq '.closingIssuesReferences[0].number // empty')

          if [ -z "$ISSUE_NUMBER" ]; then
            echo "No closing issue reference found on this PR. Exiting."
            exit 0
          fi

          echo "Found linked issue: #$ISSUE_NUMBER"

          # Check if the linked issue has the 'fleet' label
          HAS_FLEET=$(gh issue view "$ISSUE_NUMBER" --repo "$REPO" --json labels --jq '[.labels[].name] | any(. == "fleet")')

          if [ "$HAS_FLEET" = "true" ]; then
            echo "Linked issue has 'fleet' label. Applying 'fleet-merge-ready' to PR."
            gh pr edit "$PR_URL" --add-label "fleet-merge-ready"

            # Check if linked issue has a milestone and copy it
            MILESTONE_TITLE=$(gh issue view "$ISSUE_NUMBER" --repo "$REPO" --json milestone --jq '.milestone.title // empty')
            if [ -n "$MILESTONE_TITLE" ]; then
              echo "Applying milestone '$MILESTONE_TITLE' to PR."
              gh pr edit "$PR_URL" --milestone "$MILESTONE_TITLE"
            fi
          else
            echo "Linked issue does not have 'fleet' label. Ignoring."
          fi