name: CI

on:
  push:
    branches: [ main ]
  pull_request:

permissions:
  contents: read

jobs:

  matrix_build:
    strategy:
      matrix:
        otp-version: ['22', '23', '24']
        # erlef/setup-beam action does not support macos yet
        os: [ubuntu-latest, windows-latest]
        rebar3-version: ['3.17']
        include:
          - otp-version: '21'
            os: ubuntu-latest
            rebar3-version: '3.15.2'
          - otp-version: '21'
            os: windows-latest
            rebar3-version: '3.15.2'
          - otp-version: '20'
            os: ubuntu-latest
            rebar3-version: '3.15.2'

    runs-on: ${{ matrix.os }}
    env:
      # Define to something other than empty string to enable verbose rebar3 logging
      DEBUG: ''
    steps:
      - name: Check out repository code
        uses: actions/checkout@v2
        with:
          persist-credentials: false
          submodules: recursive
      - name: Setup Erlang
        id: setup-beam
        uses: ./.github/actions/setup-beam
        with:
          otp-version: ${{ matrix.otp-version }}
          rebar3-version: ${{ matrix.rebar3-version }}
      - name: Setup MSVC toolchain
        if: ${{ matrix.os == 'windows-latest' }}
        uses: ./.github/actions/msvc-dev-cmd
      - name: Check coding style with erlfmt
        if: ${{ matrix.os == 'ubuntu-latest' }}
        run: rebar3 fmt --check
        continue-on-error: true
      - name: Compile
        run: rebar3 compile
      - name: EUnit tests
        run: rebar3 eunit
      - name: Restore dialyzer PLT from cache
        uses: actions/cache@v2
        with:
          path: ~/.cache/rebar3/rebar3_*_plt
          key: ${{ runner.os }}-${{ steps.setup-beam.outputs.otp-version }}
      - name: Run dialyzer analysis
        run: rebar3 as test dialyzer
      - name: Setup tmate session on job failure
        uses: ./.github/actions/tmate
        if: ${{ failure() }}
        with:
          limit-access-to-actor: true