ci.yml

name: CI

on:
  pull_request:
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ${{ matrix.os }}
    env:
      MIX_ENV: test
    strategy:
      fail-fast: false
      matrix:
        include:
          # Oldest.
          - elixir: "1.11"
            otp: "23.3"
            os: ubuntu-20.04

          # Newest.
          - elixir: "1.17"
            otp: "27.0"
            lint: lint
            os: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

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

      - run: mix deps.get --only test

      - run: mix format --check-formatted
        if: ${{ matrix.lint }}

      - run: mix do deps.get, deps.unlock --check-unused
        if: ${{ matrix.lint }}

      - run: mix compile --warnings-as-errors
        if: ${{ matrix.lint }}

      - run: mix test