name: pr-labels

on:
  push:
    branches:
      - main

jobs:
  is-properly-labeled:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write

    steps:
      - name: Set up python
        uses: actions/setup-python@v5

      - name: Install requests
        run: pip install requests

      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Process commit and find merger responsible for labeling
        id: commit
        run: |
          MERGER=$(python .github/process_commit.py ${{ github.sha }})
          echo "merger=${MERGER}" | tee --append $GITHUB_OUTPUT

      - name: Ping merger responsible for labeling if necessary
        if: ${{ steps.commit.outputs.merger != '' }}
        uses: mshick/add-pr-comment@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          message: |
            Hey ${{ steps.commit.outputs.merger }}!

            You merged this PR, but no labels were added.
            The list of valid labels is available at https://github.com/pytorch/vision/blob/main/.github/process_commit.py