ci.yml

name: CI

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

permissions:
  pull-requests: write

jobs:
  unit_tests:
    name: Unit tests Elixir ${{matrix.elixir}} / OTP ${{matrix.otp}}
    runs-on: ubuntu-20.04

    strategy:
      matrix:
        include:
          - elixir: "1.14"
            otp: "25"
          - elixir: "1.12"
            otp: "23"

    steps:
      - name: Checkout
        uses: actions/checkout@v3

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

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

      - name: Restore _build cache
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}

      - name: Restore plt cache
        if: ${{ matrix.otp == '25' && matrix.elixir == '1.14' }}
        uses: actions/cache@v3
        with:
          path: priv/plts
          key: ${{ runner.os }}-build-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}

      - name: Install deps
        run: mix deps.get

      - name: Check Formatting
        run: mix format --check-formatted

      - name: Run unit tests
        run: |
          mix clean
          mix test

      - name: Run unit tests with persistent_term backend
        run: |
          mix clean
          mix test
        env:
          SCHEMA_PROVIDER: persistent_term

      - name: Run dialyzer
        if: ${{ matrix.otp == '25' && matrix.elixir == '1.14' }}
        run: |
          mkdir -p priv/plts/{local,core}
          MIX_ENV=test mix dialyzer

  federation_compatibility_tests:
    name: Federation compatibility tests
    runs-on: ubuntu-20.04

    strategy:
      matrix:
        include:
          - elixir: "1.14"
            otp: "25"

    steps:
      - name: Save action secrets
        id: actionsecrets
        shell: bash
        run: |
          if [ $IS_FORK != "true" ]; then
            echo "github_token=$GITHUB_TOKEN" >> $GITHUB_OUTPUT
          fi
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          IS_FORK: ${{ github.event.pull_request.head.repo.full_name != github.repository }}

      - name: Checkout
        uses: actions/checkout@v3

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

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

      - name: Restore _build cache
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}

      - name: Print federation compatibility schema
        run: |
          mix deps.get
          mix absinthe.federation.schema.sdl --schema ProductsWeb.Schema --out schema.graphql
        working-directory: ./federation_compatibility

      - name: Test subgraph compatibility
        uses: apollographql/federation-subgraph-compatibility@v1
        with:
          compose: "federation_compatibility_docker_compose.yml"
          schema: "federation_compatibility/schema.graphql"
          token: ${{ steps.actionsecrets.outputs.github_token }}
          port: 4001
          failOnWarning: true
          failOnRequired: true