ci.yml

name: Continuous Integration
on:
  push:
  pull_request:
    branches:
      - main

jobs:
  run-tests:
    runs-on: ubuntu-latest
    strategy:
      # two-dimensional matrix. first for "frontend"/"backend" and second for "lint"/"typecheck"
      matrix:
        subfolder: ["frontend", "backend"]
        command: ["lint", "typecheck"]
      fail-fast: false

    name: Run yarn ${{ matrix.command }} in ${{ matrix.subfolder }}/
    defaults:
      run:
        working-directory: ${{ matrix.subfolder }}
    steps:
      - uses: actions/checkout@v4

      - name: Use Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '22'

      - name: Cache dependencies
        uses: actions/cache@v4
        with:
          path: ${{ matrix.subfolder }}/node_modules
          key: ${{ runner.os }}-${{ matrix.subfolder }}-yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
              ${{ runner.os }}-${{ matrix.subfolder }}-yarn-
          save-always: true

      - name: Install dependencies
        run: yarn install --frozen-lockfile

      - name: Run ${{ matrix.command }}
        run: yarn ${{ matrix.command }}