label.yml

name: Label Pull Requests

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  label-pr:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Get changed files
        id: changed-files
        run: |
          git fetch origin ${{ github.base_ref }} --depth=1
          git diff --name-only origin/${{ github.base_ref }} > changed-files.txt
          echo "##[group]Changed files"
          cat changed-files.txt
          echo "##[endgroup]"
          echo "::set-output name=files::$(cat changed-files.txt)"

      - name: Add labels to PR
        env:
          GH_TOKEN: "${{ github.token }}"
          FILES: ${{ steps.changed-files.outputs.files }}
        run: |
          # Labels
          LABEL_NEW="pr: new extension"
          LABEL_CHANGE="pr: change existing extension"
          LABEL_OTHER="pr: other"

          # Folder to monitor
          TARGET_FOLDER="extensions/"

          # Initialize flags
          ADD_NEW="false"
          MODIFY_EXISTING="false"

          # Process each file
          while IFS= read -r FILE; do
            if [[ "$FILE" == $TARGET_FOLDER* ]]; then
              if ! git ls-tree -r origin/${{ github.base_ref }} --name-only | grep -q "^$FILE$"; then
                ADD_NEW="true"
              else
                MODIFY_EXISTING="true"
              fi
            fi
          done < changed-files.txt

          # Add labels
          if [[ "$ADD_NEW" == "true" ]]; then
            gh pr edit ${{ github.event.number }} --add-label "$LABEL_NEW"
          fi

          if [[ "$MODIFY_EXISTING" == "true" ]]; then
            gh pr edit ${{ github.event.number }} --add-label "$LABEL_CHANGE"
          fi

          if [[ "$ADD_NEW" == "false" && "$MODIFY_EXISTING" == "false" ]]; then
            gh pr edit ${{ github.event.number }} --add-label "$LABEL_OTHER"
          fi