add-untriaged.yml

name: Apply 'untriaged' label during issue lifecycle

on:
  issues:
    types: [opened, reopened, transferred]

jobs:
  apply-label-if-not-collaborator:
    runs-on: ubuntu-latest
    steps:
      - name: Check if issue author is a collaborator
        id: check-collaborator
        uses: actions/github-script@v6
        with:
          script: |
            const issueAuthor = context.payload.issue.user.login;
            const repoOwner = context.repo.owner;
            const repoName = context.repo.repo;
            let isCollaborator = false;
            try {
              // Attempt to fetch user's permission level
              await github.rest.repos.getCollaboratorPermissionLevel({
                owner: repoOwner,
                repo: repoName,
                username: issueAuthor,
              });

              // If no error is thrown, the user is a collaborator
              isCollaborator = true;
            } catch (error) {
              // Error thrown indicates the user is not a collaborator,
              // or does not have explicit permission set.
              console.log(`${issueAuthor} is not a collaborator.`);
            }
            core.setOutput('is_collaborator', isCollaborator.toString());
      - name: Apply label if not a collaborator
        if: steps.check-collaborator.outputs.is_collaborator == 'false'
        uses: actions/github-script@v6
        with:
          script: |
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['untriaged']
            })