voirs-spatial 0.1.0-rc.1

# GitHub Actions Workflow for Performance Regression Detection
#
# This workflow runs on pull requests and checks for performance regressions
# against the baseline stored in the repository.

name: Performance Regression Check

on:
  pull_request:
    branches: [ main, develop ]
    paths:
      - 'src/**'
      - 'benches/**'
      - 'Cargo.toml'
      - 'Cargo.lock'
  workflow_dispatch:

env:
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: 1

jobs:
  performance-regression:
    name: Check for Performance Regressions
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        fetch-depth: 0  # Full history for baseline comparison

    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
      with:
        components: rustfmt, clippy

    - name: Cache cargo registry
      uses: actions/cache@v4
      with:
        path: ~/.cargo/registry
        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo index
      uses: actions/cache@v4
      with:
        path: ~/.cargo/git
        key: ${{ runner.os }}-cargo-git-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo build
      uses: actions/cache@v4
      with:
        path: target
        key: ${{ runner.os }}-cargo-target-${{ hashFiles('**/Cargo.lock') }}

    - name: Install criterion
      run: cargo install --version=0.5.1 cargo-criterion || true

    - name: Restore baseline
      uses: actions/cache@v4
      with:
        path: .benchmark_baselines
        key: benchmark-baseline-${{ github.base_ref }}
        restore-keys: |
          benchmark-baseline-

    - name: Run performance benchmarks
      run: |
        cargo bench --bench regression_tracking -- --noplot

    - name: Check for regressions
      id: regression_check
      run: |
        chmod +x scripts/check_performance_regression.sh
        ./scripts/check_performance_regression.sh || echo "::set-output name=regression::true"

    - name: Upload benchmark results
      if: always()
      uses: actions/upload-artifact@v4
      with:
        name: benchmark-results
        path: |
          target/criterion/
          regression_report.md

    - name: Comment PR with results
      if: github.event_name == 'pull_request' && steps.regression_check.outputs.regression == 'true'
      uses: actions/github-script@v7
      with:
        script: |
          const fs = require('fs');
          const report = fs.existsSync('regression_report.md')
            ? fs.readFileSync('regression_report.md', 'utf8')
            : 'Performance regression detected. See workflow logs for details.';

          github.rest.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: `## ⚠️ Performance Regression Detected\n\n${report}\n\nPlease review the changes and optimize as needed.`
          });

    - name: Fail if regression detected
      if: steps.regression_check.outputs.regression == 'true'
      run: |
        echo "::error::Performance regression detected"
        exit 1

  # Optional: Update baseline on merge to main
  update-baseline:
    name: Update Performance Baseline
    runs-on: ubuntu-latest
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'

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

    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable

    - name: Run benchmarks
      run: cargo bench --bench regression_tracking -- --noplot

    - name: Save new baseline
      run: |
        chmod +x scripts/save_baseline.sh
        ./scripts/save_baseline.sh

    - name: Cache baseline
      uses: actions/cache@v4
      with:
        path: .benchmark_baselines
        key: benchmark-baseline-${{ github.ref_name }}-${{ github.sha }}