pr-label-check.yaml

# make sure the pr is labeled as wanted, case: we could generate changelog by the pr label
name: PR Label Check

# Trigger the workflow on pull requests only
on:
  pull_request:
    types: [opened, labeled, unlabeled, synchronize]

env:
  LEASE_ONE_OF_LABELS: "release/bug release/feature release/none pr/robot_update"
  FORBID_LABELS: "pr/not-ready not-ready"

jobs:
  check-label:
    name: Check label set
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      # must set one of required label, for release note generator
      - name: check label
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -x
          PR_NUMBER="${{ github.event.number }}"
          [ -n "${PR_NUMBER}" ] || { echo "no PR number" ; exit 1 ; }
          gh pr view ${PR_NUMBER}
          PR_LABEL=` gh pr view ${PR_NUMBER} | grep -i "^labels:" | tr ',' ' ' | tr -s ' ' | sed 's/labels://g' `
          [ -n "${PR_LABEL}" ] || { echo "no PR_LABEL " ;  exit 1 ; }
          echo "============ checking forbidden label ============ "
          for LABEL in ${PR_LABEL} ; do
              if grep -i " ${LABEL} " <<< " ${{ env.FORBID_LABELS }} " &>/dev/null ; then
                  echo "error, forbidden label ${LABEL} is not clear, all forbidden labels: '${{ env.FORBID_LABELS }}' "
                  exit 1
              fi
          done
          echo "============ checking required label ============ "
          COUNTER=0
          for LABEL in ${PR_LABEL} ; do
              ! grep -i " ${LABEL} " <<< " ${{ env.LEASE_ONE_OF_LABELS }} " &>/dev/null  || (( COUNTER=COUNTER+1 ))
          done
          if (( COUNTER == 0 )) ; then
              echo "error, at lease, one of '${{ env.LEASE_ONE_OF_LABELS }}' should be set "
              exit 1
          fi
          echo "============ result ============ "
          echo "pr labels: ${PR_LABEL}"
          echo "required one label: ${{ env.LEASE_ONE_OF_LABELS }} "
          echo "forbideen labels: ${{ env.FORBID_LABELS }} "