name: Elixir

on:
  pull_request:
    branches:
      - 'main'
    types: [opened, reopened, synchronize, labeled]
  push:
    branches:
      - 'main'

jobs:
  test-matrix:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - uses: actions/checkout@v2
      - name: Read file
        id: set-matrix
        run: |
          matrixStringifiedObject="{\"otp_version\":[\"24.0.6\",\"23.3.4.7\",\"22.3.4.21\"],\"elixir_version\":[\"1.12.3\",\"1.11.4\"],\"rebar3_version\":[\"3.16.1\"],\"os\":[\"ubuntu-18.04\"],\"include\":[{\"otp_version\":\"21.3.8.24\",\"elixir_version\":\"1.10.4\",\"rebar3_version\":\"3.15.2\"},{\"otp_version\":\"21.3.8.24\",\"elixir_version\":\"1.11.4\",\"rebar3_version\":\"3.15.2\"}],\"exclude\":[{\"otp_version\":\"21.3.8.24\",\"elixir_version\":\"1.12.3\"}]}"
          echo "::set-output name=matrix::$matrixStringifiedObject"
  opentelemetry-phoenix:
    needs: [test-matrix]
    if: (contains(github.event.pull_request.labels.*.name, 'elixir') && contains(github.event.pull_request.labels.*.name, 'opentelemetry_phoenix'))
    env:
      app: 'opentelemetry_phoenix'
    defaults:
      run:
        working-directory: instrumentation/${{ env.app }}
    runs-on: ubuntu-18.04
    name: Opentelemetry Phoenix test on Elixir ${{ matrix.elixir_version }} (OTP ${{ matrix.otp_version }})
    strategy:
      fail-fast: false
      matrix: ${{ fromJson(needs.test-matrix.outputs.matrix) }}
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: ${{ matrix.otp_version }}
          elixir-version: ${{ matrix.elixir_version }}
          rebar3-version: ${{ matrix.rebar3_version }}
      - name: Cache
        uses: actions/cache@v2
        with:
          path: |
            ${{ env.app }}/deps
            ${{ env.app }}/_build
          key: ${{ runner.os }}-build-${{ matrix.otp_version }}-${{ matrix.elixir_version }}-v3-${{ hashFiles(format('{0}{1}', github.workspace, 'instrumentation/${{ env.app }}/mix.lock')) }}
      - name: Fetch deps
        if: steps.deps-cache.outputs.cache-hit != 'true'
        run: mix deps.get
      - name: Compile project
        run: mix compile --warnings-as-errors
      - name: Check formatting
        run: mix format --check-formatted
      - name: Test
        run: mix test