name: Benchmark

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

permissions:
   contents: read

jobs:
  Run_benchmarks:
    if: contains(github.event.pull_request.labels.*.name, 'benchmark')
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Benchmark Repo
        uses: actions/checkout@v4
        with:
          repository: django/django-asv
          path: "."
      - name: Install Requirements
        run: pip install -r requirements.txt
      - name: Cache Django
        uses: actions/cache@v3
        with:
          path: Django/*
          key: Django
      - name: Run Benchmarks
        shell: bash -l {0}
        run: |-
          asv machine --machine ubuntu-latest --yes > /dev/null
          echo 'Beginning benchmarks...'
          asv continuous --interleave-processes -a processes=2 --split --show-stderr 'HEAD^' 'HEAD' |\
          sed -n -E '/(before.*after.*ratio)|(BENCHMARKS)/,$p' >> out.txt
          echo 'Benchmarks Done.'
          echo '```' >> $GITHUB_STEP_SUMMARY
          cat out.txt >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          if grep -q "PERFORMANCE DECREASED" out.txt;
          then
            exit 1
          fi
