labels_from_comment.yml

# This workflow allows any user to add one of the `awaiting-author`, or `WIP` labels,
# by commenting on the PR or issue.
# Other labels from this set are removed automatically at the same time.

name: Label PR based on Comment

on:
  issue_comment:
    types: [created]

jobs:
  update-label:
    if: github.event.issue.pull_request != null && (contains(github.event.comment.body, 'awaiting-author') || contains(github.event.comment.body, 'WIP'))
    runs-on: ubuntu-latest

    steps:
    - name: Add label based on comment
      uses: actions/github-script@v6
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        script: |
          const { owner, repo, number: issue_number  } = context.issue;
          const commentLines = context.payload.comment.body.split('\r\n');

          const awaitingAuthor = commentLines.includes('awaiting-author');
          const wip = commentLines.includes('WIP');

          if (awaitingAuthor || wip) {
            await github.rest.issues.removeLabel({ owner, repo, issue_number, name: 'awaiting-author' }).catch(() => {});
            await github.rest.issues.removeLabel({ owner, repo, issue_number, name: 'WIP' }).catch(() => {});
          }

          if (awaitingAuthor) {
            await github.rest.issues.addLabels({ owner, repo, issue_number, labels: ['awaiting-author'] });
          }
          if (wip) {
            await github.rest.issues.addLabels({ owner, repo, issue_number, labels: ['WIP'] });
          }