# This GitHub Actions workflow runs JMH benchmarks when a new comment is created on a pull request
name: Run JMH Benchmarks for Pull Request

on:
  issue_comment: # This workflow triggers when a comment is created
    types: [created]

# Only allow one instance of JMH benchmarking to be running at any given time
concurrency: all

jobs:
  benchmarking:
    # Only run this job if a comment on a pull request contains '/benchmark' and is a PR on the uber/NullAway repository
    if: github.event.issue.pull_request && contains(github.event.comment.body, '/benchmark') && github.repository == 'uber/NullAway'
    runs-on: ubuntu-latest 
    permissions: write-all 

    steps:
    - name: Add reaction
      uses: peter-evans/create-or-update-comment@v3
      with:
        comment-id: ${{ github.event.comment.id }}
        reactions: '+1'
        
    - name: Checkout repository 
      uses: actions/checkout@v3

    - name: Set branch name 
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }} 
      run: |
        chmod +x ./.github/workflows/get_repo_details.sh 
        ./.github/workflows/get_repo_details.sh "${{ secrets.GITHUB_TOKEN }}" "${{ github.event.issue.number }}" "${{ github.repository }}"

    - id: 'auth'
      name: Authenticating 
      uses: 'google-github-actions/auth@v1' 
      with:
        credentials_json: '${{ secrets.GCP_SA_KEY_1 }}' 

    - name: Set up Google Cloud SDK 
      uses: google-github-actions/setup-gcloud@v1
      
    - name: Start VM
      run: gcloud compute instances start nullway-jmh --zone=us-central1-a
      
    - name: Run benchmarks 
      run: |
        chmod +x ./.github/workflows/run_gcp_benchmarks.sh
        ./.github/workflows/run_gcp_benchmarks.sh 
        
    - name: Cleanup
      # Delete the branch directory on the Google Cloud instance
      if: always()
      run: |
        ./.github/workflows/gcloud_ssh.sh " export BRANCH_NAME=${BRANCH_NAME} && rm -r -f $BRANCH_NAME"

    - name: Formatting Benchmark # Create a text file containing the benchmark results
      run:  |
        (echo 'Main Branch:'; echo '```' ; cat main_text.txt; echo '```'; echo 'With This PR:'; echo '```' ; cat pr_text.txt; echo '```') > benchmark.txt
   
    - name: Comment Benchmark
      uses: mshick/add-pr-comment@v2
      if: always() # This step is for adding the comment
      with:         
        message-path: benchmark.txt  # The path to the message file to leave as a comment
        message-id: benchmark
    - name: Stop VM
      if: always()
      run: gcloud compute instances stop nullway-jmh --zone=us-central1-a