benchmark.yml

on:
  pull_request:

permissions:
  pull-requests: write

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  benchmark:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - ref: ${{ github.base_ref }}
            name: base
          - ref: ${{ github.head_ref }}
            name: head
    steps:
      - uses: actions/checkout@v3
        with:
          ref: ${{ matrix.ref }}
      - uses: ruby/setup-ruby@v1
        with:
          ruby-version: "3.2"
          bundler-cache: true
      - uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { issue: { number: issue_number }, repo: { owner, repo }  } = context;
            const { data: comments } = await github.rest.issues.listComments({ owner, repo, issue_number });
            const existingComment = comments.find(comment => comment.user.login === "github-actions[bot]" && comment.body.includes("Benchmark result: ${{ matrix.name }}"))

            const { execSync } = require("child_process");
            const result = execSync("bin/benchmark");
            const body = `
              Benchmark result: ${{ matrix.name }} (${{ matrix.ref }})
              \`\`\`
              ${result}
              \`\`\`
            `;

            if (existingComment) {
              github.rest.issues.updateComment({ owner, repo, body, comment_id: existingComment.id });
            } else {
              github.rest.issues.createComment({ owner, repo, body, issue_number });
            }