ci.yml

name: CI

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

permissions:
  contents: read

jobs:
  mix_check:
    name: Elixir ${{ matrix.elixir }} / OTP ${{ matrix.otp }}
    runs-on: ubuntu-20.04
    strategy:
      # Following matrix is maintained by following https://hexdocs.pm/elixir/compatibility-and-deprecations.html
      # And, only the most recent 3 versions of Elixir are involved.
      matrix:
        include:
          # Elixir v1.17
          - { elixir: '1.17.x', otp: '27.x' }
          - { elixir: '1.17.x', otp: '26.x' }
          - { elixir: '1.17.x', otp: '25.x' }
          # Elixir v1.16
          - { elixir: '1.16.x', otp: '26.x' }
          - { elixir: '1.16.x', otp: '25.x' }
          - { elixir: '1.16.x', otp: '24.x' }
          # Elixir v1.15
          - { elixir: '1.15.x', otp: '26.x' }
          - { elixir: '1.15.x', otp: '25.x' }
          - { elixir: '1.15.x', otp: '24.x' }
    steps:
    - uses: actions/checkout@v4
    - name: Setup Elixir
      uses: erlef/setup-beam@v1
      with:
        elixir-version: ${{ matrix.elixir }}
        otp-version: ${{ matrix.otp }}
    - name: Restore dependencies cache
      uses: actions/cache@v4
      with:
        path: deps
        key: ${{ runner.os }}-elixir_${{ matrix.elixir }}-otp_${{ matrix.otp }}-mix_${{ hashFiles('**/mix.lock') }}
        restore-keys: ${{ runner.os }}-elixir_${{ matrix.elixir }}-otp_${{ matrix.otp }}-mix
    - name: Install dependencies
      run: mix deps.get
    - name: Run mix check
      run: mix check