ci.yml

name: CI

on:
  push:
    branches: [main, master]
  pull_request:
    branches: [main, master]

jobs:
  syntax:
    name: Node ${{ matrix.node }} syntax check
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        node: [20, 22]
    steps:
      - uses: actions/checkout@v4

      - name: Use Node.js ${{ matrix.node }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node }}

      # The project has zero npm dependencies, so there's no `npm install` here.
      # `node --check` parses each file and fails the job on any syntax error.
      - name: Syntax-check every .js under src/
        run: |
          set -e
          find src -name '*.js' -type f -print0 | while IFS= read -r -d '' f; do
            echo "::group::$f"
            node --check "$f"
            echo "::endgroup::"
          done

      - name: Confirm zero npm dependencies
        run: |
          # The project is meant to run on pure Node.js builtins.
          # If someone adds a `dependencies` block to package.json this test
          # flags it so the maintainers notice in review.
          if node -e "const p=require('./package.json'); if(p.dependencies && Object.keys(p.dependencies).length>0) {console.error('Unexpected deps:',p.dependencies); process.exit(1)}"; then
            echo "OK: no npm dependencies"
          fi