ci.yml

name: CI

on:
  pull_request:
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ubuntu-20.04
    env:
      MIX_ENV: test
    strategy:
      fail-fast: false
      matrix:
        include:
          - pair:
              elixir: "1.10.4"
              otp: "21.3"
          - pair:
              elixir: "1.16"
              otp: "26.2"
            lint: lint
    steps:
      - uses: actions/checkout@v4

      - name: Install Erlang and Elixir
        uses: erlef/setup-beam@v1
        with:
          otp-version: ${{ matrix.pair.otp }}
          elixir-version: ${{ matrix.pair.elixir }}

      - name: Install dependencies
        run: mix deps.get --check-locked

      - name: Ensure that files are formatted
        run: mix format --check-formatted
        if: ${{ matrix.lint }}

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

      - name: Run tests
        run: mix test