label_and_milestone_checker.yml

name: Labels and milestone
on:
  pull_request:
    types:
      - opened
      - synchronize
      - reopened
      - labeled
      - unlabeled
      - milestoned
      - demilestoned
  merge_group: # to be prepared on merge queue
    types: [checks_requested]

jobs:
  check_labels:
    if: (github.event_name == 'pull_request' && contains(github.event.pull_request.labels.*.name, 'ready to merge'))
    name: Check ready-to-merge PR has at least one type label
    runs-on: ubuntu-latest
    steps:
      - name: Check labels
        uses: docker://agilepathway/pull-request-label-checker:latest
        with:
          any_of: bugfix,feature,documentation,performance,enhancement,maintenance
          repo_token: ${{ secrets.GITHUB_TOKEN }}

  check_next_milestone:
    name: Check milestone is next release
    if: (github.event_name == 'pull_request' && github.event.pull_request.milestone != null)
    runs-on: ubuntu-latest
    steps:
      - name: Check milestone for closest due date
        env:
          GH_TOKEN: ${{ github.token }}
          PR_MILESTONE_NAME: ${{ github.event.pull_request.milestone.title }}
        run: |
          # Install GitHub CLI if necessary
          # sudo apt-get install -y gh

          IFS='/' read -r repoOwner repoName <<< "${{ github.repository }}"

          # Fetch the closest future milestone
          # shellcheck disable=SC2016
          CLOSEST_MILESTONE=$(gh api graphql -f query='
            query($repoName: String!, $repoOwner: String!) {
              repository(name: $repoName, owner: $repoOwner) {
                milestones(states: OPEN, orderBy: {field: DUE_DATE, direction: ASC}, first: 100) {
                  nodes {
                    title
                    number
                    dueOn
                  }
                }
              }
          }' --jq '.data.repository.milestones.nodes | map(select(.dueOn >= now)) | .[0].number' -f repoName="$repoName" -f repoOwner="$repoOwner")

          # Extract the milestone number of the current PR
          PR_MILESTONE_NUMBER=$(gh api "/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}" --jq '.milestone.number')
          CLOSEST_MILESTONE_NAME=$(gh api "/repos/${{ github.repository }}/milestones/$CLOSEST_MILESTONE" --jq '.title')


          # Check if the PR's milestone is the closest future milestone
          if [ "$CLOSEST_MILESTONE" != "$PR_MILESTONE_NUMBER" ]; then
            echo "If this PR can be merged in time for the earlier milestone,"
            echo "changing the milestone to $CLOSEST_MILESTONE_NAME will make the check pass."
            echo "If this PR must wait until $PR_MILESTONE_NAME,"
            echo "remove the ready-to-merge tag to skip this check,"
            echo "and re-add it when all earlier milestones are completed."
            exit 1
          fi