build.gradle

// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License.  You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import org.ajoberstar.grgit.Grgit

buildscript {
  repositories {
    mavenCentral()
    jcenter()
  }
  apply from: file('gradle/buildscript.gradle'), to: buildscript

  dependencies {
    // For Apache Rat plugin to ignore non-Git files
    classpath "org.ajoberstar:grgit:1.9.3"
    classpath 'com.github.ben-manes:gradle-versions-plugin:0.17.0'
    classpath 'org.scoverage:gradle-scoverage:2.1.0'
    classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.2'
    classpath 'org.owasp:dependency-check-gradle:3.1.1'
  }
}

apply from: "$rootDir/gradle/dependencies.gradle"

allprojects {

  repositories {
    mavenCentral()
  }
  
  apply plugin: 'idea'
  apply plugin: 'org.owasp.dependencycheck'
  apply plugin: 'com.github.ben-manes.versions'

  dependencyUpdates {
    revision="release"
    resolutionStrategy = {
      componentSelection { rules ->
        rules.all { ComponentSelection selection ->
          boolean rejected = ['snap', 'alpha', 'beta', 'rc', 'cr', 'm'].any { qualifier ->
            selection.candidate.version ==~ /(?i).*[.-]${qualifier}[.\d-]*/
          }
          if (rejected) {
            selection.reject('Release candidate')
          }
        }
      }
    }
    configurations {
      runtime {
        resolutionStrategy {
          force "com.fasterxml.jackson.core:jackson-annotations:$versions.jackson"
        }
      }
    }
  }

  if (JavaVersion.current().isJava8Compatible()) {
    tasks.withType(Javadoc) {
      // disable the crazy super-strict doclint tool in Java 8
      // noinspection SpellCheckingInspection
      options.addStringOption('Xdoclint:none', '-quiet')
    }
  }

}

ext {
  gradleVersion = "4.5.1"
  buildVersionFileName = "kafka-version.properties"

  maxPermSizeArgs = []
  if (!JavaVersion.current().isJava8Compatible())
    maxPermSizeArgs += '-XX:MaxPermSize=512m'

  userMaxForks = project.hasProperty('maxParallelForks') ? maxParallelForks.toInteger() : null

  skipSigning = project.hasProperty('skipSigning') && skipSigning.toBoolean()
  shouldSign = !skipSigning && !version.endsWith("SNAPSHOT") && project.gradle.startParameter.taskNames.any { it.contains("upload") }

  mavenUrl = project.hasProperty('mavenUrl') ? project.mavenUrl : ''
  mavenUsername = project.hasProperty('mavenUsername') ? project.mavenUsername : ''
  mavenPassword = project.hasProperty('mavenPassword') ? project.mavenPassword : ''

  userShowStandardStreams = project.hasProperty("showStandardStreams") ? showStandardStreams : null

  userTestLoggingEvents = project.hasProperty("testLoggingEvents") ? Arrays.asList(testLoggingEvents.split(",")) : null

  generatedDocsDir = new File("${project.rootDir}/docs/generated")

  commitId = project.hasProperty('commitId') ? commitId : null
}

apply from: file('wrapper.gradle')

if (new File('.git').exists()) {
  apply from: file('gradle/rat.gradle')
  rat {
    // Exclude everything under the directory that git should be ignoring via .gitignore or that isn't checked in. These
    // restrict us only to files that are checked in or are staged.
    def repo = Grgit.open(project.file('.'))
    excludes = new ArrayList<String>(repo.clean(ignore: false, directories: true, dryRun: true))
    // And some of the files that we have checked in should also be excluded from this check
    excludes.addAll([
        '**/.git/**',
        '**/build/**',
        'CONTRIBUTING.md',
        'PULL_REQUEST_TEMPLATE.md',
        'gradlew',
        'gradlew.bat',
        '**/README.md',
        '**/id_rsa',
        '**/id_rsa.pub',
        'checkstyle/suppressions.xml',
        'streams/quickstart/java/src/test/resources/projects/basic/goal.txt'
    ])
  }
}

subprojects {
  apply plugin: 'java'
  // apply the eclipse plugin only to subprojects that hold code. 'connect' is just a folder.
  if (!project.name.equals('connect')) {
    apply plugin: 'eclipse'
    fineTuneEclipseClasspathFile(eclipse, project)
  }
  apply plugin: 'maven'
  apply plugin: 'signing'
  apply plugin: 'checkstyle'

  if (!JavaVersion.current().isJava9Compatible())
    apply plugin: 'findbugs'

  sourceCompatibility = 1.7
  targetCompatibility = 1.7

  compileJava {
    options.encoding = 'UTF-8'
    options.compilerArgs << "-Xlint:deprecation"
    // -Xlint:unchecked is too buggy in Java 7, so we only enable for Java 8 or higher
    if (JavaVersion.current().isJava8Compatible())
      options.compilerArgs << "-Xlint:unchecked"
    // --release is the recommended way to select the target release, but it's only supported in Java 9 so we also
    // set --source and --target via `sourceCompatibility` and `targetCompatibility`. If/when Gradle supports `--release`
    // natively (https://github.com/gradle/gradle/issues/2510), we should switch to that.
    if (JavaVersion.current().isJava9Compatible())
      options.compilerArgs << "--release" << "7"
  }

  uploadArchives {
    repositories {
      signing {
          required { shouldSign }
          sign configurations.archives

          // To test locally, replace mavenUrl in ~/.gradle/gradle.properties to file://localhost/tmp/myRepo/
          mavenDeployer {
              beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
              repository(url: "${mavenUrl}") {
                  authentication(userName: "${mavenUsername}", password: "${mavenPassword}")
              }
              afterEvaluate {
                  pom.artifactId = "${archivesBaseName}"
                  pom.project {
                      name 'Apache Kafka'
                      packaging 'jar'
                      url 'http://kafka.apache.org'
                      licenses {
                          license {
                              name 'The Apache Software License, Version 2.0'
                              url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
                              distribution 'repo'
                          }
                      }
                  }
              }
          }
      }
    }
  }

  def testLoggingEvents = ["passed", "skipped", "failed"]
  def testShowStandardStreams = false
  def testExceptionFormat = 'full'

  test {
    maxParallelForks = userMaxForks ?: Runtime.runtime.availableProcessors()

    minHeapSize = "256m"
    maxHeapSize = "2048m"
    jvmArgs = maxPermSizeArgs

    testLogging {
      events = userTestLoggingEvents ?: testLoggingEvents
      showStandardStreams = userShowStandardStreams ?: testShowStandardStreams
      exceptionFormat = testExceptionFormat
    }

  }

  task integrationTest(type: Test, dependsOn: compileJava) {
    maxParallelForks = userMaxForks ?: Runtime.runtime.availableProcessors()

    minHeapSize = "256m"
    maxHeapSize = "2048m"
    jvmArgs = maxPermSizeArgs

    testLogging {
      events = userTestLoggingEvents ?: testLoggingEvents
      showStandardStreams = userShowStandardStreams ?: testShowStandardStreams
      exceptionFormat = testExceptionFormat
    }

    useJUnit {
      includeCategories 'org.apache.kafka.test.IntegrationTest'
    }

  }

  task unitTest(type: Test, dependsOn: compileJava) {
    maxParallelForks = userMaxForks ?: Runtime.runtime.availableProcessors()

    minHeapSize = "256m"
    maxHeapSize = "2048m"
    jvmArgs = maxPermSizeArgs

    testLogging {
      events = userTestLoggingEvents ?: testLoggingEvents
      showStandardStreams = userShowStandardStreams ?: testShowStandardStreams
      exceptionFormat = testExceptionFormat
    }

    useJUnit {
      excludeCategories 'org.apache.kafka.test.IntegrationTest'
    }
    
  }

  jar {
    from "$rootDir/LICENSE"
    from "$rootDir/NOTICE"
  }

  task srcJar(type: Jar) {
    classifier = 'sources'
    from "$rootDir/LICENSE"
    from "$rootDir/NOTICE"
    from sourceSets.main.allSource
  }

  task javadocJar(type: Jar, dependsOn: javadoc) {
    classifier 'javadoc'
    from "$rootDir/LICENSE"
    from "$rootDir/NOTICE"
    from javadoc.destinationDir
  }

  task docsJar(dependsOn: javadocJar)

  javadoc {
    options.charSet = 'UTF-8'
    options.docEncoding = 'UTF-8'
    options.encoding = 'UTF-8'
  }

  task systemTestLibs(dependsOn: jar)

  artifacts {
    archives srcJar
    archives javadocJar
  }

  if(!sourceSets.test.allSource.isEmpty()) {
    task testJar(type: Jar) {
      classifier = 'test'
      from "$rootDir/LICENSE"
      from "$rootDir/NOTICE"
      from sourceSets.test.output
    }

    task testSrcJar(type: Jar, dependsOn: testJar) {
      classifier = 'test-sources'
      from "$rootDir/LICENSE"
      from "$rootDir/NOTICE"
      from sourceSets.test.allSource
    }

    artifacts {
      archives testJar
      archives testSrcJar
    }
  }

  plugins.withType(ScalaPlugin) {
    task scaladocJar(type:Jar) {
      classifier = 'scaladoc'
      from "$rootDir/LICENSE"
      from "$rootDir/NOTICE"
      from scaladoc.destinationDir
    }

    //documentation task should also trigger building scala doc jar
    docsJar.dependsOn scaladocJar

    artifacts {
      archives scaladocJar
    }
  }

  tasks.withType(ScalaCompile) {
    scalaCompileOptions.additionalParameters = [
      "-deprecation",
      "-unchecked",
      "-encoding", "utf8",
      "-Xlog-reflective-calls",
      "-feature",
      "-language:postfixOps",
      "-language:implicitConversions",
      "-language:existentials",
      "-Xlint:by-name-right-associative",
      "-Xlint:delayedinit-select",
      "-Xlint:doc-detached",
      "-Xlint:missing-interpolator",
      "-Xlint:nullary-override",
      "-Xlint:nullary-unit",
      "-Xlint:option-implicit",
      "-Xlint:package-object-classes",
      "-Xlint:poly-implicit-overload",
      "-Xlint:private-shadow",
      "-Xlint:stars-align",
      "-Xlint:type-parameter-shadow",
      "-Xlint:unsound-match",
    ]

    if (versions.baseScala != '2.11') {
      scalaCompileOptions.additionalParameters += [
        "-Xlint:constant",
        "-Xlint:unused"
      ]
    }

    configure(scalaCompileOptions.forkOptions) {
      memoryMaximumSize = '1g'
      jvmArgs = ['-Xss2m'] + maxPermSizeArgs
    }
  }

  checkstyle {
    configFile = new File(rootDir, "checkstyle/checkstyle.xml")
    configProperties = [importControlFile: "$rootDir/checkstyle/import-control.xml"]
    // version 7.x requires Java 8
    toolVersion = '6.19'
  }
  test.dependsOn('checkstyleMain', 'checkstyleTest')

  if (!JavaVersion.current().isJava9Compatible()) {
    findbugs {
      toolVersion = "3.0.1"
      excludeFilter = file("$rootDir/gradle/findbugs-exclude.xml")
      ignoreFailures = false
    }
    test.dependsOn('findbugsMain')

    tasks.withType(FindBugs) {
      reports {
        xml.enabled(project.hasProperty('xmlFindBugsReport'))
        html.enabled(!project.hasProperty('xmlFindBugsReport'))
      }
    }
  }

  // Ignore core since its a scala project
  if (it.path != ':core') {
    apply plugin: "jacoco"

    jacoco {
      toolVersion = "0.8.1"
    }

    // NOTE: Jacoco Gradle plugin does not support "offline instrumentation" this means that classes mocked by PowerMock
    // may report 0 coverage, since the source was modified after initial instrumentation.
    // See https://github.com/jacoco/jacoco/issues/51
    jacocoTestReport {
      dependsOn tasks.test
      sourceSets sourceSets.main
      reports {
        html.enabled = true
        xml.enabled = true
        csv.enabled = false
      }
    }
  }

  def coverageGen = it.path == ':core' ? 'reportScoverage' : 'jacocoTestReport'
  task reportCoverage(dependsOn: [coverageGen])

}

gradle.taskGraph.whenReady { taskGraph ->
  taskGraph.getAllTasks().findAll { it.name.contains('findbugsScoverage') || it.name.contains('findbugsTest') }.each { task ->
    task.enabled = false
  }
}

def fineTuneEclipseClasspathFile(eclipse, project) {
  eclipse.classpath.file {
    beforeMerged { cp ->
      cp.entries.clear()
      // for the core project add the directories defined under test/scala as separate source directories
      if (project.name.equals('core')) {
        cp.entries.add(new org.gradle.plugins.ide.eclipse.model.SourceFolder("src/test/scala/integration", null))
        cp.entries.add(new org.gradle.plugins.ide.eclipse.model.SourceFolder("src/test/scala/other", null))
        cp.entries.add(new org.gradle.plugins.ide.eclipse.model.SourceFolder("src/test/scala/unit", null))
      }
    }
    whenMerged { cp ->
      // for the core project exclude the separate sub-directories defined under test/scala. These are added as source dirs above
      if (project.name.equals('core')) {
        cp.entries.findAll { it.kind == "src" && it.path.equals("src/test/scala") }*.excludes = ["integration/", "other/", "unit/"]
      }
      /* 
       * Set all eclipse build output to go to 'build_eclipse' directory. This is to ensure that gradle and eclipse use different 
       * build output directories, and also avoid using the eclpise default of 'bin' which clashes with some of our script directories.
       * https://discuss.gradle.org/t/eclipse-generated-files-should-be-put-in-the-same-place-as-the-gradle-generated-files/6986/2
       */
      cp.entries.findAll { it.kind == "output" }*.path = "build_eclipse"
      /*
       * Some projects have explicitly added test output dependencies. These are required for the gradle build but not required
       * in Eclipse since the dependent projects are added as dependencies. So clean up these from the generated classpath.
       */
      cp.entries.removeAll { it.kind == "lib" && it.path.matches(".*/build/(classes|resources)/test") }
    }
  }
}

// Aggregates all jacoco results into the root project directory
task jacocoRootReport(type: org.gradle.testing.jacoco.tasks.JacocoReport) {
  def javaProjects = subprojects.findAll { it.path != ':core' }

  description = 'Generates an aggregate report from all subprojects'
  dependsOn(javaProjects.test)

  additionalSourceDirs = files(javaProjects.sourceSets.main.allSource.srcDirs)
  sourceDirectories = files(javaProjects.sourceSets.main.allSource.srcDirs)
  classDirectories =  files(javaProjects.sourceSets.main.output)
  executionData = files(javaProjects.jacocoTestReport.executionData)

  reports {
    html.enabled = true
    xml.enabled = true
  }

  // workaround to ignore projects that don't have any tests at all
  onlyIf = { true }
  doFirst {
    executionData = files(executionData.findAll { it.exists() })
  }
}

task reportCoverage(dependsOn: ['jacocoRootReport', 'core:reportCoverage'])

for ( sv in availableScalaVersions ) {
  String taskSuffix = sv.replaceAll("\\.", "_")

  tasks.create(name: "jar_core_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['core:jar']
  }

  tasks.create(name: "test_core_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['core:test']
  }

  tasks.create(name: "srcJar_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['core:srcJar']
  }

  tasks.create(name: "docsJar_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['core:docsJar']
  }

  tasks.create(name: "install_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['install']
  }

  tasks.create(name: "releaseTarGz_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['releaseTarGz']
  }

  tasks.create(name: "uploadCoreArchives_${taskSuffix}", type: GradleBuild) {
    startParameter = project.getGradle().getStartParameter().newInstance()
    startParameter.projectProperties += [scalaVersion: "${sv}"]
    tasks = ['core:uploadArchives']
  }
}

def connectPkgs = ['connect:api', 'connect:runtime', 'connect:transforms', 'connect:json', 'connect:file']
def pkgs = ['clients', 'examples', 'log4j-appender', 'tools', 'streams', 'streams:test-utils', 'streams:examples'] + connectPkgs

/** Create one task per default Scala version */
def withDefScalaVersions(taskName) {
  defaultScalaVersions.collect { taskName + '_' + it.replaceAll('\\.', '_') }
}

tasks.create(name: "jarConnect", dependsOn: connectPkgs.collect { it + ":jar" }) {}
tasks.create(name: "jarAll", dependsOn: withDefScalaVersions('jar_core') + pkgs.collect { it + ":jar" }) { }

tasks.create(name: "srcJarAll", dependsOn: withDefScalaVersions('srcJar') + pkgs.collect { it + ":srcJar" }) { }

tasks.create(name: "docsJarAll", dependsOn: withDefScalaVersions('docsJar') + pkgs.collect { it + ":docsJar" }) { }

tasks.create(name: "testConnect", dependsOn: connectPkgs.collect { it + ":test" }) {}
tasks.create(name: "testAll", dependsOn: withDefScalaVersions('test_core') + pkgs.collect { it + ":test" }) { }

tasks.create(name: "installAll", dependsOn: withDefScalaVersions('install') + pkgs.collect { it + ":install" }) { }

tasks.create(name: "releaseTarGzAll", dependsOn: withDefScalaVersions('releaseTarGz')) { }

tasks.create(name: "uploadArchivesAll", dependsOn: withDefScalaVersions('uploadCoreArchives') + pkgs.collect { it + ":uploadArchives" }) { }

project(':core') {
  println "Building project 'core' with Scala version ${versions.scala}"

  apply plugin: 'scala'
  apply plugin: "org.scoverage"
  archivesBaseName = "kafka_${versions.baseScala}"

  dependencies {
    compile project(':clients')
    compile libs.jacksonDatabind
    compile libs.joptSimple
    compile libs.metrics
    compile libs.scalaLibrary
    // only needed transitively, but set it explicitly to ensure it has the same version as scala-library
    compile libs.scalaReflect
    compile libs.scalaLogging
    compile libs.slf4jApi
    compile(libs.zkclient) {
      exclude module: 'zookeeper'
    }
    compile(libs.zookeeper) {
      exclude module: 'slf4j-log4j12'
      exclude module: 'log4j'
      exclude module: 'netty'
    }

    compileOnly libs.log4j

    testCompile project(':clients').sourceSets.test.output
    testCompile libs.bcpkix
    testCompile libs.easymock
    testCompile(libs.apacheda) {
      exclude group: 'xml-apis', module: 'xml-apis'
    }
    testCompile libs.apachedsCoreApi
    testCompile libs.apachedsInterceptorKerberos
    testCompile libs.apachedsProtocolShared
    testCompile libs.apachedsProtocolKerberos
    testCompile libs.apachedsProtocolLdap
    testCompile libs.apachedsLdifPartition
    testCompile libs.apachedsMavibotPartition
    testCompile libs.apachedsJdbmPartition
    testCompile libs.junit
    testCompile libs.scalatest
    testCompile libs.slf4jlog4j
    testCompile libs.jfreechart

    scoverage libs.scoveragePlugin
    scoverage libs.scoverageRuntime
  }
  
  scoverage {
    reportDir = file("${rootProject.buildDir}/scoverage")
    highlighting = false
  }
  checkScoverage {
    minimumRate = 0.0
  }
  checkScoverage.shouldRunAfter('test')

  configurations {
    // manually excludes some unnecessary dependencies
    compile.exclude module: 'javax'
    compile.exclude module: 'jline'
    compile.exclude module: 'jms'
    compile.exclude module: 'jmxri'
    compile.exclude module: 'jmxtools'
    compile.exclude module: 'mail'
    // To prevent a UniqueResourceException due the same resource existing in both
    // org.apache.directory.api/api-all and org.apache.directory.api/api-ldap-schema-data
    testCompile.exclude module: 'api-ldap-schema-data'
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
    }
    into "$buildDir/dependant-libs-${versions.scala}"
    duplicatesStrategy 'exclude'
  }

  task genProtocolErrorDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.common.protocol.Errors'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "protocol_errors.html").newOutputStream()
  }

  task genProtocolApiKeyDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.common.protocol.ApiKeys'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "protocol_api_keys.html").newOutputStream()
  }

  task genProtocolMessageDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.common.protocol.Protocol'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "protocol_messages.html").newOutputStream()
  }

  task genAdminClientConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.clients.admin.AdminClientConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "admin_client_config.html").newOutputStream()
  }

  task genProducerConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.clients.producer.ProducerConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "producer_config.html").newOutputStream()
  }

  task genConsumerConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.clients.consumer.ConsumerConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "consumer_config.html").newOutputStream()
  }

  task genKafkaConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'kafka.server.KafkaConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "kafka_config.html").newOutputStream()
  }

  task genTopicConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'kafka.log.LogConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "topic_config.html").newOutputStream()
  }

  task genConsumerMetricsDocs(type: JavaExec) {
    classpath = sourceSets.test.runtimeClasspath
    main = 'org.apache.kafka.clients.consumer.internals.ConsumerMetrics'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "consumer_metrics.html").newOutputStream()
  }

  task genProducerMetricsDocs(type: JavaExec) {
    classpath = sourceSets.test.runtimeClasspath
    main = 'org.apache.kafka.clients.producer.internals.ProducerMetrics'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "producer_metrics.html").newOutputStream()
  }

  task siteDocsTar(dependsOn: ['genProtocolErrorDocs', 'genProtocolApiKeyDocs', 'genProtocolMessageDocs',
                               'genAdminClientConfigDocs', 'genProducerConfigDocs', 'genConsumerConfigDocs',
                               'genKafkaConfigDocs', 'genTopicConfigDocs',
                               ':connect:runtime:genConnectConfigDocs', ':connect:runtime:genConnectTransformationDocs',
                               ':streams:genStreamsConfigDocs', 'genConsumerMetricsDocs', 'genProducerMetricsDocs',
                               ':connect:runtime:genConnectMetricsDocs'], type: Tar) {
    classifier = 'site-docs'
    compression = Compression.GZIP
    from project.file("$rootDir/docs")
    into 'site-docs'
    duplicatesStrategy 'exclude'
  }

  tasks.create(name: "releaseTarGz", dependsOn: configurations.archives.artifacts, type: Tar) {
    into "kafka_${versions.baseScala}-${version}"
    compression = Compression.GZIP
    from(project.file("$rootDir/bin")) { into "bin/" }
    from(project.file("$rootDir/config")) { into "config/" }
    from "$rootDir/LICENSE"
    from "$rootDir/NOTICE"
    from(configurations.runtime) { into("libs/") }
    from(configurations.archives.artifacts.files) { into("libs/") }
    from(project.siteDocsTar) { into("site-docs/") }
    from(project(':tools').jar) { into("libs/") }
    from(project(':tools').configurations.runtime) { into("libs/") }
    from(project(':connect:api').jar) { into("libs/") }
    from(project(':connect:api').configurations.runtime) { into("libs/") }
    from(project(':connect:runtime').jar) { into("libs/") }
    from(project(':connect:runtime').configurations.runtime) { into("libs/") }
    from(project(':connect:transforms').jar) { into("libs/") }
    from(project(':connect:transforms').configurations.runtime) { into("libs/") }
    from(project(':connect:json').jar) { into("libs/") }
    from(project(':connect:json').configurations.runtime) { into("libs/") }
    from(project(':connect:file').jar) { into("libs/") }
    from(project(':connect:file').configurations.runtime) { into("libs/") }
    from(project(':streams').jar) { into("libs/") }
    from(project(':streams').configurations.runtime) { into("libs/") }
    from(project(':streams:test-utils').jar) { into("libs/") }
    from(project(':streams:test-utils').configurations.runtime) { into("libs/") }
    from(project(':streams:examples').jar) { into("libs/") }
    from(project(':streams:examples').configurations.runtime) { into("libs/") }
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn('copyDependantLibs')
  }

  jar.manifest {
    attributes(
      'Version': "${version}"
    )
  }

  tasks.create(name: "copyDependantTestLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('*.jar')
    }
    into "$buildDir/dependant-testlibs"
    duplicatesStrategy 'exclude'
  }

  systemTestLibs.dependsOn('jar', 'testJar', 'copyDependantTestLibs')

  checkstyle {
    configProperties = [importControlFile: "$rootDir/checkstyle/import-control-core.xml"]
  }
}

project(':examples') {
  archivesBaseName = "kafka-examples"

  dependencies {
    compile project(':core')
  }

  javadoc {
    enabled = false
  }

  checkstyle {
    configProperties = [importControlFile: "$rootDir/checkstyle/import-control-core.xml"]
  }
}

project(':clients') {
  archivesBaseName = "kafka-clients"

  dependencies {
    compile libs.lz4
    compile libs.snappy
    compile libs.slf4jApi

    testCompile libs.bcpkix
    testCompile libs.junit
    testCompile libs.easymock
    testCompile libs.powermockJunit4
    testCompile libs.powermockEasymock

    testRuntime libs.slf4jlog4j
  }

  task determineCommitId {
    def takeFromHash = 16
    if (commitId) {
      commitId = commitId.take(takeFromHash)
    } else if (file("$rootDir/.git/HEAD").exists()) {
      def headRef = file("$rootDir/.git/HEAD").text
      if (headRef.contains('ref: ')) {
        headRef = headRef.replaceAll('ref: ', '').trim()
        if (file("$rootDir/.git/$headRef").exists()) {
          commitId = file("$rootDir/.git/$headRef").text.trim().take(takeFromHash)
        }
      } else {
        commitId = headRef.trim().take(takeFromHash)
      }
    } else {
      commitId = "unknown"
    }
  }

  task createVersionFile(dependsOn: determineCommitId) {
    ext.receiptFile = file("$buildDir/kafka/$buildVersionFileName")
    outputs.file receiptFile
    outputs.upToDateWhen { false }
    doLast {
      def data = [
        commitId: commitId,
        version: version,
      ]

      receiptFile.parentFile.mkdirs()
      def content = data.entrySet().collect { "$it.key=$it.value" }.sort().join("\n")
      receiptFile.setText(content, "ISO-8859-1")
    }
  }

  jar {
    dependsOn createVersionFile
    from("$buildDir") {
        include "kafka/$buildVersionFileName"
    }
  }

  clean.doFirst {
    delete "$buildDir/kafka/"
  }

  javadoc {
    include "**/org/apache/kafka/clients/admin/*"
    include "**/org/apache/kafka/clients/consumer/*"
    include "**/org/apache/kafka/clients/producer/*"
    include "**/org/apache/kafka/common/*"
    include "**/org/apache/kafka/common/acl/*"
    include "**/org/apache/kafka/common/annotation/*"
    include "**/org/apache/kafka/common/errors/*"
    include "**/org/apache/kafka/common/header/*"
    include "**/org/apache/kafka/common/resource/*"
    include "**/org/apache/kafka/common/serialization/*"
    include "**/org/apache/kafka/common/config/*"
    include "**/org/apache/kafka/common/security/auth/*"
    include "**/org/apache/kafka/server/policy/*"
    include "**/org/apache/kafka/common/security/token/delegation/*"
  }
}

project(':tools') {
  archivesBaseName = "kafka-tools"

  dependencies {
    compile project(':clients')
    compile project(':log4j-appender')
    compile libs.argparse4j
    compile libs.jacksonDatabind
    compile libs.slf4jApi

    compile libs.jacksonJaxrsJsonProvider
    compile libs.jerseyContainerServlet
    compile libs.jaxbApi // Jersey dependency that was available in the JDK before Java 9
    compile libs.activation // Jersey dependency that was available in the JDK before Java 9
    compile libs.jettyServer
    compile libs.jettyServlet
    compile libs.jettyServlets

    testCompile project(':clients')
    testCompile libs.junit
    testCompile project(':clients').sourceSets.test.output
    testCompile libs.easymock
    testCompile libs.powermockJunit4
    testCompile libs.powermockEasymock

    testRuntime libs.slf4jlog4j
  }

  javadoc {
    enabled = false
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
    }
    into "$buildDir/dependant-libs-${versions.scala}"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn 'copyDependantLibs'
  }
}

project(':streams') {
  archivesBaseName = "kafka-streams"

  dependencies {
    compile project(':clients')
    compile project(':connect:json')  // this dependency should be removed after we unify data API
    compile libs.slf4jApi
    compile libs.rocksDBJni

    // testCompileOnly prevents streams from exporting a dependency on test-utils, which would cause a dependency cycle
    testCompileOnly project(':streams:test-utils')
    testCompile project(':clients').sourceSets.test.output
    testCompile project(':core')
    testCompile project(':core').sourceSets.test.output
    testCompile libs.junit
    testCompile libs.easymock
    testCompile libs.bcpkix

    testRuntime libs.slf4jlog4j
  }

  javadoc {
    include "**/org/apache/kafka/streams/**"
    exclude "**/internals/**"
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
    }
    into "$buildDir/dependant-libs-${versions.scala}"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn 'copyDependantLibs'
  }

  systemTestLibs {
    dependsOn testJar
  }

  task genStreamsConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.streams.StreamsConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "streams_config.html").newOutputStream()
  }
}

project(':streams:test-utils') {
  archivesBaseName = "kafka-streams-test-utils"

  dependencies {
    compile project(':streams')
    compile project(':clients')

    testCompile project(':clients').sourceSets.test.output
    testCompile libs.junit

    testRuntime libs.slf4jlog4j
  }

  javadoc {
    include "**/org/apache/kafka/streams/test/**"
    exclude "**/internals/**"
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.runtime) {
      exclude('kafka-streams*')
    }
    into "$buildDir/dependant-libs-${versions.scala}"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn 'copyDependantLibs'
  }

}

project(':streams:examples') {
  archivesBaseName = "kafka-streams-examples"

  dependencies {
    compile project(':streams')
    compile project(':connect:json')  // this dependency should be removed after we unify data API
    compile libs.slf4jlog4j

    testCompile project(':streams:test-utils')
    testCompile project(':clients').sourceSets.test.output // for org.apache.kafka.test.IntegrationTest
    testCompile libs.junit
  }

  javadoc {
    enabled = false
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.runtime) {
      exclude('kafka-streams*')
    }
    into "$buildDir/dependant-libs-${versions.scala}"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn 'copyDependantLibs'
  }
}

project(':streams:upgrade-system-tests-0100') {
  archivesBaseName = "kafka-streams-upgrade-system-tests-0100"

  dependencies {
    testCompile libs.kafkaStreams_0100
  }

  systemTestLibs {
    dependsOn testJar
  }
}

project(':streams:upgrade-system-tests-0101') {
  archivesBaseName = "kafka-streams-upgrade-system-tests-0101"

  dependencies {
    testCompile libs.kafkaStreams_0101
  }

  systemTestLibs {
    dependsOn testJar
  }
}

project(':streams:upgrade-system-tests-0102') {
  archivesBaseName = "kafka-streams-upgrade-system-tests-0102"

  dependencies {
    testCompile libs.kafkaStreams_0102
  }

  systemTestLibs {
    dependsOn testJar
  }
}

project(':streams:upgrade-system-tests-0110') {
  archivesBaseName = "kafka-streams-upgrade-system-tests-0110"

  dependencies {
    testCompile libs.kafkaStreams_0110
  }

  systemTestLibs {
    dependsOn testJar
  }
}

project(':streams:upgrade-system-tests-10') {
  archivesBaseName = "kafka-streams-upgrade-system-tests-10"

  dependencies {
    testCompile libs.kafkaStreams_10
  }

  systemTestLibs {
    dependsOn testJar
  }
}

project(':jmh-benchmarks') {

  apply plugin: 'com.github.johnrengelman.shadow'

  shadowJar {
    baseName = 'kafka-jmh-benchmarks-all'
    classifier = null
    version = null
  }

  dependencies {
    compile project(':clients')
    compile project(':streams')
    compile libs.jmhCore
    compile libs.jmhGeneratorAnnProcess
    compile libs.jmhCoreBenchmarks
  }

  jar {
    manifest {
      attributes "Main-Class": "org.openjdk.jmh.Main"
    }
  }


  task jmh(type: JavaExec, dependsOn: [':jmh-benchmarks:clean', ':jmh-benchmarks:shadowJar']) {

    main="-jar"

    doFirst {
      if (System.getProperty("jmhArgs")) {
          args System.getProperty("jmhArgs").split(',')
      }
      args = [shadowJar.archivePath, *args]
    }
  }

  javadoc {
     enabled = false
  }
}

project(':log4j-appender') {
  archivesBaseName = "kafka-log4j-appender"

  dependencies {
    compile project(':clients')
    compile libs.slf4jlog4j

    testCompile project(':clients').sourceSets.test.output
    testCompile libs.junit
  }

  javadoc {
    enabled = false
  }

}

project(':connect:api') {
  archivesBaseName = "connect-api"

  dependencies {
    compile project(':clients')
    compile libs.slf4jApi

    testCompile libs.junit

    testRuntime libs.slf4jlog4j
    testCompile project(':clients').sourceSets.test.output
  }

  javadoc {
    include "**/org/apache/kafka/connect/**" // needed for the `javadocAll` task
    options.links "http://docs.oracle.com/javase/7/docs/api/"
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
      exclude('connect-*')
    }
    into "$buildDir/dependant-libs"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn copyDependantLibs
  }
}

project(':connect:transforms') {
  archivesBaseName = "connect-transforms"

  dependencies {
    compile project(':connect:api')
    compile libs.slf4jApi

    testCompile libs.easymock
    testCompile libs.junit
    testCompile libs.powermockJunit4
    testCompile libs.powermockEasymock

    testRuntime libs.slf4jlog4j
    testCompile project(':clients').sourceSets.test.output
  }

  javadoc {
    enabled = false
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
      exclude('connect-*')
    }
    into "$buildDir/dependant-libs"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn copyDependantLibs
  }
}

project(':connect:json') {
  archivesBaseName = "connect-json"

  dependencies {
    compile project(':connect:api')
    compile libs.jacksonDatabind
    compile libs.slf4jApi

    testCompile libs.easymock
    testCompile libs.junit
    testCompile libs.powermockJunit4
    testCompile libs.powermockEasymock

    testRuntime libs.slf4jlog4j
    testCompile project(':clients').sourceSets.test.output
  }

  javadoc {
    enabled = false
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
      exclude('connect-*')
    }
    into "$buildDir/dependant-libs"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn copyDependantLibs
  }
}

project(':connect:runtime') {
  archivesBaseName = "connect-runtime"

  dependencies {
    compile project(':connect:api')
    compile project(":connect:transforms")
    compile project(':clients')
    compile project(':tools')
    compile libs.slf4jApi

    compile libs.jacksonJaxrsJsonProvider
    compile libs.jerseyContainerServlet
    compile libs.jaxbApi // Jersey dependency that was available in the JDK before Java 9
    compile libs.activation // Jersey dependency that was available in the JDK before Java 9
    compile libs.jettyServer
    compile libs.jettyServlet
    compile libs.jettyServlets
    compile libs.jettyClient
    compile(libs.reflections)
    compile(libs.mavenArtifact)

    testCompile project(':clients').sourceSets.test.output
    testCompile libs.easymock
    testCompile libs.junit
    testCompile libs.powermockJunit4
    testCompile libs.powermockEasymock

    testCompile project(":connect:json")
    testCompile project(':clients').sourceSets.test.output

    testRuntime libs.slf4jlog4j
  }

  javadoc {
    enabled = false
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
      exclude('connect-*')
    }
    into "$buildDir/dependant-libs"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn copyDependantLibs
  }

  task genConnectConfigDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.connect.runtime.distributed.DistributedConfig'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "connect_config.html").newOutputStream()
  }

  task genConnectTransformationDocs(type: JavaExec) {
    classpath = sourceSets.main.runtimeClasspath
    main = 'org.apache.kafka.connect.tools.TransformationDoc'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "connect_transforms.html").newOutputStream()
  }

  task genConnectMetricsDocs(type: JavaExec) {
    classpath = sourceSets.test.runtimeClasspath
    main = 'org.apache.kafka.connect.runtime.ConnectMetrics'
    if( !generatedDocsDir.exists() ) { generatedDocsDir.mkdirs() }
    standardOutput = new File(generatedDocsDir, "connect_metrics.html").newOutputStream()
  }

}

project(':connect:file') {
  archivesBaseName = "connect-file"

  dependencies {
    compile project(':connect:api')
    compile libs.slf4jApi

    testCompile libs.easymock
    testCompile libs.junit
    testCompile libs.powermockJunit4
    testCompile libs.powermockEasymock

    testRuntime libs.slf4jlog4j
    testCompile project(':clients').sourceSets.test.output
  }

  javadoc {
    enabled = false
  }

  tasks.create(name: "copyDependantLibs", type: Copy) {
    from (configurations.testRuntime) {
      include('slf4j-log4j12*')
      include('log4j*jar')
    }
    from (configurations.runtime) {
      exclude('kafka-clients*')
      exclude('connect-*')
    }
    into "$buildDir/dependant-libs"
    duplicatesStrategy 'exclude'
  }

  jar {
    dependsOn copyDependantLibs
  }
}

task aggregatedJavadoc(type: Javadoc) {
  def projectsWithJavadoc = subprojects.findAll { it.javadoc.enabled }
  source = projectsWithJavadoc.collect { it.sourceSets.main.allJava }
  classpath = files(projectsWithJavadoc.collect { it.sourceSets.main.compileClasspath })
  includes = projectsWithJavadoc.collectMany { it.javadoc.getIncludes() }
  excludes = projectsWithJavadoc.collectMany { it.javadoc.getExcludes() }
  options.links "http://docs.oracle.com/javase/7/docs/api/"
}