name: CI

on:
  push:
  pull_request:
    branches:
      # Branches from forks have the form 'user:branch-name' so we only run
      # this job on pull_request events for branches that look like fork
      # branches. Without this we would end up running this job twice for non
      # forked PRs, once for the push and then once for opening the PR.
      - "**:**"
  schedule:
    - cron: "0 3 * * 1" # Every monday at 3 AM

jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
        crystal: [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: Install dependencies
        run: shards install
        env:
          SHARDS_OPTS: --ignore-crystal-version

      - name: Run specs
        run: make test

      - name: Check formatting
        run: crystal tool format --check