name: Benchmark PR

on:
  pull_request_target:
    types: [labeled]

jobs:
  benchmark:
    if: ${{ github.event.label.name == 'benchmark' }}
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      PR-BENCH: ${{ steps.benchmark-pr.outputs.BENCH_RESULT }}
      MASTER-BENCH: ${{ steps.benchmark-master.outputs.BENCH_RESULT }}
    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: false
          ref: ${{github.event.pull_request.head.sha}}
          repository: ${{github.event.pull_request.head.repo.full_name}}

      - uses: actions/setup-node@v4
        with:
          node-version: 18

      - name: Install
        run: |
          npm install --ignore-scripts

      - name: Run benchmark
        id: benchmark-pr
        run: |
          npm run --silent bench > ./bench-result
          content=$(cat ./bench-result)
          content="${content//'%'/'%25'}"
          content="${content//$'\n'/'%0A'}"
          content="${content//$'\r'/'%0D'}"
          echo "::set-output name=BENCH_RESULT::$content"

      # master benchmark
      - uses: actions/checkout@v4
        with:
          ref: 'master'

      - name: Install
        run: |
          npm install --ignore-scripts

      - name: Run benchmark
        id: benchmark-master
        run: |
          npm run --silent bench > ./bench-result
          content=$(cat ./bench-result)
          content="${content//'%'/'%25'}"
          content="${content//$'\n'/'%0A'}"
          content="${content//$'\r'/'%0D'}"
          echo "::set-output name=BENCH_RESULT::$content"

  output-benchmark:
    if: "always()"
    needs: [benchmark]
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - name: Comment PR
        uses: thollander/actions-comment-pull-request@v2
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          message: |
            **PR**:
            ```
            ${{ needs.benchmark.outputs.PR-BENCH }}
            ```
            **MASTER**:
            ```
            ${{ needs.benchmark.outputs.MASTER-BENCH }}
            ```
            
      - uses: actions-ecosystem/action-remove-labels@v1
        with:
          labels: |
            benchmark
          github_token: ${{ secrets.GITHUB_TOKEN }}