labeler.yml

name: "@PR • Labeler"
run-name: "@PR • Labeler triggered by ${{ github.actor }} ${{ format('on branch {0}', github.head_ref) }}"

on:
  - pull_request_target

jobs:
  triage:
    permissions:
      contents: read
      pull-requests: write
    runs-on: ubuntu-latest
    steps:
      - name: generate token
        id: generate-token
        uses: tibdex/github-app-token@v1
        with:
          app_id: ${{ secrets.GH_BOT_APP_ID }}
          private_key: ${{ secrets.GH_BOT_PRIVATE_KEY }}
      - uses: actions/labeler@v4
        with:
          repo-token: ${{ steps.generate-token.outputs.token }}
      - uses: actions/github-script@v6
        if: github.event.pull_request.head.repo.fork
        with:
          github-token: ${{ steps.generate-token.outputs.token }}
          script: |
            try {
              const { data: rawLabels } = await github.rest.issues.listLabelsOnIssue({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
              }) || [];
              const labels = rawLabels.map(label => label.name)
              console.log(labels)
              if(labels.includes('fork')) {
                return
              }
              await github.rest.issues.setLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                labels: [...labels, 'fork']
              })
            } catch(error) {
              console.error(error)
            }