elixir.yml

name: Elixir CI

on:
  push:
    branches: [master]
  pull_request:
    branches: [master]

jobs:
  lint:
    name: Lint (OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}})
    runs-on: ubuntu-latest
    strategy:
      matrix:
        otp: ["26"]
        elixir: ["1.16"]
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        id: beam
        with:
          otp-version: ${{matrix.otp}}
          elixir-version: ${{matrix.elixir}}
      - name: PLT cache
        uses: actions/cache@v2
        with:
          key: |
            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-plt
          restore-keys: |
            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-plt
          path: |
            priv/plts
      - run: mix deps.get
      - run: mix compile --warnings-as-errors
      - run: mix format --check-formatted
      - run: mix credo --strict --all
      - run: mix dialyzer

  test_examples:
    runs-on: ubuntu-latest
    name: Test Sample Applications
    env:
      MIX_ENV: test
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: 26
          elixir-version: 1.16
      - uses: actions/cache@v2
        with:
          key: |
            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-plug-build
          restore-keys: |
            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-plug-build
          path: |
            _build

      - name: run Plug sample app tests
        working-directory: ./examples/plug_app
        run: mix do deps.get, test

  test:
    runs-on: ubuntu-20.04
    name: Test (OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}})
    strategy:
      matrix:
        otp: ["23", "24", "25", "26"]
        elixir: ["1.14", "1.15", "1.16"]
        # Test each elixir version with lowest and highest compatible OTP version, exclude others
        # See https://hexdocs.pm/elixir/compatibility-and-deprecations.html#between-elixir-and-erlang-otp
        exclude:
          - { otp: "24", elixir: "1.14" }
          - { otp: "25", elixir: "1.14" }
          - { otp: "23", elixir: "1.15" }
          - { otp: "25", elixir: "1.15" }
          - { otp: "23", elixir: "1.16" }
          - { otp: "25", elixir: "1.16" }
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: ${{matrix.otp}}
          elixir-version: ${{matrix.elixir}}
      - uses: actions/cache@v2
        with:
          key: |
            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-build
          restore-keys: |
            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-build
          path: |
            _build
      - run: mix deps.get
      - run: mix test