ci.yml

name: CI
on: [push, pull_request]
permissions:
  contents: read

jobs:
  mix_test:
    name: mix test (OTP ${{matrix.otp}} | Elixir ${{matrix.elixir}})

    env:
      MIX_ENV: test

    strategy:
      matrix:
        include:
          - elixir: 1.12.0
            otp: 22.3

          - elixir: 1.14.3
            otp: 25.1
            lint: true

    runs-on: ubuntu-20.04

    steps:
    - name: Checkout
      uses: actions/checkout@v3

    - name: Set up Elixir
      uses: erlef/setup-beam@v1
      with:
        elixir-version: ${{ matrix.elixir }}
        otp-version: ${{ matrix.otp }}

    - name: Restore deps and _build cache
      uses: actions/cache@v3
      with:
        path: |
          deps
          _build
        key: deps-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}
        restore-keys: |
          deps-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}

    - name: Install dependencies
      run: mix deps.get --only test

    - name: Remove compiled application files
      run: mix clean

    - name: Compile & lint dependencies
      run: mix compile --warnings-as-errors
      if: ${{ matrix.lint }}

    - name: Run tests
      run: mix test