name: CI

on:
  push:
  pull_request:
    branches: [master]
  schedule:
    - cron: '0 6 * * 1'  # Every monday 6 AM

jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
        crystal: [1.0.0, latest, nightly]
    runs-on: ${{ matrix.os }}

    steps:
      - name: Install Crystal
        uses: oprypin/install-crystal@v1
        with:
          crystal: ${{ matrix.crystal }}

      - name: Download source
        uses: actions/checkout@v2

      - name: Run specs
        run: crystal spec

      - name: Check formatting
        run: crystal tool format; git diff --exit-code
        if: matrix.crystal == 'latest' && matrix.os == 'ubuntu-latest'