elixir.yaml

name: CI Pipeline

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

env:
  MIX_ENV: test
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

permissions:
  contents: read

jobs:
  build:
    name: Build and test
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        include:
          - elixir: "1.14"
            otp: "23.0"

            # Latest versions.
          - elixir: "1.17"
            otp: "27.0"
            lint: lint
            coverage: coverage
    steps:
      - name: Check out this repository
        uses: actions/checkout@v4

      - name: Start the Mosquitto MQTT broker
        run: |
          docker run \
          --detach \
          --name mqtt \
          -v ${{ github.workspace }}/.mosquitto:/mosquitto/config \
          -p 1883:1883 \
          -p 1884:1884 \
          eclipse-mosquitto:2.0

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

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

      - run: mix do deps.get --check-locked, deps.compile
        if: steps.cache-deps.outputs.cache-hit != 'true'

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

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

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

      - run: mix coveralls
        if: ${{ matrix.coverage }}