ci.yml

name: CI

on:
  pull_request:
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ubuntu-20.04
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      MIX_ENV: test
    strategy:
      fail-fast: false
      matrix:
        include:
          - pair:
              elixir: 1.7.4
              otp: 20.3.8.26
          - pair:
              elixir: 1.15.7
              otp: 25.3
            lint: lint
            coverage: coverage
    steps:
      - name: Checkout this repository
        uses: actions/checkout@v3

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

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

      - run: mix deps.get

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

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

      - run: mix deps.compile

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

      - name: Run tests
        run: mix test
        if: ${{ !matrix.coverage }}

      - name: Run tests with coverage
        run: mix coveralls.github
        if: ${{ matrix.coverage }}