.github/workflows/cicd-relabel-bot.yml

# If the PR get's updated by a new commit, it prevents auto-merges
# since there's no CI event attached to the commit anymore.
# This workflow re-attaches the label after a push, if the PR
# was already labeled prior to the push.
name: CICD Relabel bot

on:
  pull_request_target:

jobs:
  relabel:
    runs-on: ubuntu-latest
    env:
      PR_NUMBER: ${{ github.event.number }}
      GH_TOKEN: ${{ secrets.NEMO_RELABEL_TOKEN }}
      HOSTNAME: ${{ github.server_url }}
    permissions: write-all
    steps:
      - name: Checkout repo
        uses: actions/checkout@v4

      - name: Check if PR was already labeled with `Run CICD`
        id: pre-flight
        run: |
          LABELS=$(gh pr view "$PR_NUMBER" --json labels)
          HAS_LABEL=$(echo $LABELS \
            | jq '[.labels[].name] | any(. == "Run CICD")'
          )

          echo "has-label=$HAS_LABEL" | tee -a "$GITHUB_OUTPUT"

      - name: Relabel PR
        if: ${{ steps.pre-flight.outputs.has-label == 'true' }}
        run: |
          gh pr edit "$PR_NUMBER" --remove-label "Run CICD"
          gh pr edit "$PR_NUMBER" --add-label "Run CICD"