build.yml

name: Build

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

permissions:
  contents: read

jobs:

  # validate gradle wrapper binary https://github.com/gradle/wrapper-validation-action
  gradle-wrapper-validation:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: gradle/actions/wrapper-validation@v4

  build:
    runs-on: ubuntu-latest
    steps:

      - name: Checkout
        uses: actions/checkout@v4

      - name: Gradle build without tests
        uses: ./.github/workflows/gradle-goal
        with:
          # We also compile the test-classes, even though we are skipping the tests
          command: "./gradlew build testClasses -x test"

      # We first tar the working directory and then upload it
      # We do this because the upload-artifact action doesn't preserve file permissions
      - name: Create working dir archive
        run: "mkdir ./wdarch && tar --exclude='./wdarch' -czf ./wdarch/working-dir-build-cache.tar.gz ."
      - name: Cache working directory with build results
        uses: actions/upload-artifact@v4
        with:
          name: working-dir-build-cache
          path: ./wdarch/working-dir-build-cache.tar.gz
          retention-days: 1 # No need to waste space when this artifact is only used as part of the build process

      - name: Agent artifact
        uses: actions/upload-artifact@v4
        with:
          name: elastic-otel-javaagent
          path: |
            ./agent/build/libs/elastic-otel-javaagent-*.jar

      - name: Agent extension artifact
        uses: actions/upload-artifact@v4
        with:
          name: elastic-otel-agentextension
          path: |
            ./agentextension/build/libs/elastic-otel-agentextension-*.jar

  test:
    runs-on: ubuntu-latest
    needs:
      - build
    strategy:
      # Even if the tests fail on one JDK we want to know if it also fails on others
      fail-fast: false 
      matrix:
        # The JVMs for testing will be automatically downloaded by gradle using the toolchains-feature
        # We use the following plugin to download them: https://github.com/gradle/foojay-toolchains
        # We should make sure to always add the latest releases here when they are GA
        # non LTS-releases should be removed if a newer version is GA
        include:
          - version: 8
            vm: 'hotspot'
          - version: 11
            vm: 'hotspot'
          - version: 17
            vm: 'hotspot'
          - version: 21
            vm: 'hotspot'
          - version: 11
            vm: 'openj9'
          - version: 21
            vm: 'openj9'
    steps:
      # We use the cached working directory so that we don't have to recompile everything
      - name: Download cached build working directory
        uses: actions/download-artifact@v4
        with:
          name: working-dir-build-cache
          path: ./
      - name: Untar cached build working directory
        run: "tar -xvf working-dir-build-cache.tar.gz"
      - name: Run tests
        uses: ./.github/workflows/gradle-goal
        with:
          # We manually skip the compileJni task because we know it is up-to-date in the cached
          # working directory. The up-to-date check of this task checks for the presence of docker
          # images used for compiling the native library, which do not exist because we are in a new
          # environment.
          command: "./gradlew test -x compileJni -PtestJavaVersion=${{ matrix.version }} -PtestJavaVM=${{ matrix.vm }}"
      - name: Store test results
        if: success() || failure()
        # The test reporting workflow only supports the @v3 artifact mechanism
        uses: actions/upload-artifact@v3
        with:
          name: test-results-${{ matrix.version }}-${{ matrix.vm }}
          path: '**/build/test-results/test/TEST-*.xml'