ci.yml

name: CI

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

jobs:
  build:
    name: Build and test
    runs-on: ubuntu-20.04
    strategy:
      # This depends on listening on a UDP socket on a fixed port so only 1 at a time.
      max-parallel: 1
      matrix:
        elixir-version: ['1.6.6', '1.7.4', '1.10.4']
        otp-version: ['20.3', '21.3']
        exclude:
          - elixir-version: 1.10.4
            otp-version: 20.3
        include:
          - elixir-version: 1.11.4
            otp-version: 23.3
          - elixir-version: 1.11.4
            otp-version: 21.3
    steps:
    - uses: actions/checkout@v2
    - name: Set up Elixir
      uses: erlef/setup-beam@v1
      with:
        elixir-version: ${{ matrix.elixir-version }}
        otp-version: ${{ matrix.otp-version }}
    - name: Restore dependencies cache
      uses: actions/cache@v2
      with:
        path: deps
        key: ${{ runner.os }}-${{ matrix.elixir-version }}-${{ matrix.otp-version}}-mix-${{ hashFiles('**/mix.lock') }}
        restore-keys: ${{ runner.os }}-${{ matrix.elixir-version}}-${{ matrix.otp-version }}-mix-
    - name: Install dependencies
      run: mix deps.get
    - name: Run tests
      run: mix test