name: 'Watch Benchmarks'

on:
  workflow_dispatch:
  push:
    branches:
      - main
    paths:
      - 'bench/**'

permissions:
  issues: write

jobs:
  changes:
    runs-on: ubuntu-latest

    outputs:
      files: ${{ steps.changes.outputs.benchmarks_files }}
      changes: ${{ steps.changes.outputs.benchmarks }}

    steps:
      - uses: actions/checkout@v3

      - name: 'Detect File Changes'
        uses: dorny/paths-filter@v2
        id: changes
        with:
          list-files: json
          base: ${{ github.ref }}
          working-directory: bench
          filters: |
            benchmarks:
              - added|modified: 'bench/*.js'

  benchmark:
    needs: changes
    if: needs.changes.outputs.files != '[]'
    strategy:
      fail-fast: true
      matrix:
        # Parse JSON array containing names of all filters matching any of changed files
        # e.g. ['add-property.js', 'array-append.js'] if both bench files contains changes
        bench-file: ${{ fromJSON(needs.changes.outputs.files) }}
    steps:
      - name: Running ${{ matrix.bench-file }}
        uses: ./.github/workflows/bench.yml
        with:
          bench-file: ${{ matrix.bench-file }}