name: PR build check

on:
  pull_request:
    paths-ignore:
      - '**.md'

env:
  CI_CHUNK_SIZE: 75

jobs:
  prepare:
    name: Prepare job
    runs-on: ubuntu-latest
    outputs:
      individualMatrix: ${{ steps.generate-matrices.outputs.individualMatrix }}
      multisrcMatrix: ${{ steps.generate-matrices.outputs.multisrcMatrix }}
    env:
      CI_MODULE_GEN: true
    steps:
      - name: Clone repo
        uses: actions/checkout@v3

      - name: Validate Gradle Wrapper
        uses: gradle/wrapper-validation-action@v1

      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          java-version: 8
          distribution: adopt

      - name: Copy CI files
        run: |
          mkdir -p ~/.gradle
          cp .github/runner-files/ci-gradle.properties ~/.gradle/gradle.properties

      - name: Generate multisrc sources
        uses: gradle/gradle-command-action@v2
        with:
          arguments: :multisrc:generateExtensions

      - name: Get number of modules
        run: |
          set -x
          ./gradlew -q projects | grep '.*extensions\:\(individual\|multisrc\)\:.*\:.*' > projects.txt

          echo "NUM_INDIVIDUAL_MODULES=$(cat projects.txt | grep '.*\:individual\:.*' | wc -l)" >> $GITHUB_ENV
          echo "NUM_MULTISRC_MODULES=$(cat projects.txt | grep '.*\:multisrc\:.*' | wc -l)" >> $GITHUB_ENV

      - id: generate-matrices
        name: Create output matrices
        uses: actions/github-script@v6
        with:
          script: |
            const numIndividualModules = process.env.NUM_INDIVIDUAL_MODULES;
            const numMultisrcModules = process.env.NUM_MULTISRC_MODULES;
            const chunkSize = process.env.CI_CHUNK_SIZE;

            const numIndividualChunks = Math.ceil(numIndividualModules / chunkSize);
            const numMultisrcChunks = Math.ceil(numMultisrcModules / chunkSize);

            console.log(`Individual modules: ${numIndividualModules} (${numIndividualChunks} chunks of ${chunkSize})`);
            console.log(`Multi-source modules: ${numMultisrcModules} (${numMultisrcChunks} chunks of ${chunkSize})`);

            core.setOutput('individualMatrix', { 'chunk': [...Array(numIndividualChunks).keys()] });
            core.setOutput('multisrcMatrix', { 'chunk': [...Array(numMultisrcChunks).keys()] });

  build_multisrc:
    name: Build multisrc modules
    needs: prepare
    runs-on: ubuntu-latest
    strategy:
      matrix: ${{ fromJSON(needs.prepare.outputs.multisrcMatrix) }}
    steps:
      - name: Checkout PR
        uses: actions/checkout@v3

      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          java-version: 8
          distribution: adopt

      - name: Copy CI files
        run: |
          mkdir -p ~/.gradle
          cp .github/runner-files/ci-gradle.properties ~/.gradle/gradle.properties

      - name: Generate sources from the multi-source library
        uses: gradle/gradle-command-action@v2
        env:
          CI_MODULE_GEN: "true"
        with:
          arguments: :multisrc:generateExtensions
          cache-read-only: true

      - name: Build extensions (chunk ${{ matrix.chunk }})
        uses: gradle/gradle-command-action@v2
        env:
          CI_MULTISRC: "true"
          CI_CHUNK_NUM: ${{ matrix.chunk }}
        with:
          arguments: assembleDebug
          cache-read-only: true

  build_individual:
    name: Build individual modules
    needs: prepare
    runs-on: ubuntu-latest
    strategy:
      matrix: ${{ fromJSON(needs.prepare.outputs.individualMatrix) }}
    steps:
      - name: Checkout PR
        uses: actions/checkout@v3

      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          java-version: 8
          distribution: adopt

      - name: Copy CI files
        run: |
          mkdir -p ~/.gradle
          cp .github/runner-files/ci-gradle.properties ~/.gradle/gradle.properties

      - name: Build extensions (chunk ${{ matrix.chunk }})
        uses: gradle/gradle-command-action@v2
        env:
          CI_MULTISRC: "false"
          CI_CHUNK_NUM: ${{ matrix.chunk }}
        with:
          arguments: assembleDebug
          cache-read-only: true