Example Gradle build Java with FindBugs and PMD and CPD

build.gradle

apply plugin: "java"
apply plugin: "eclipse"
apply plugin: "maven"
apply plugin: "findbugs"
apply plugin: "pmd"

def defaultEncoding = 'UTF-8'
[compileJava, compileTestJava]*.options*.encoding = defaultEncoding

sourceCompatibility = 1.7
targetCompatibility = 1.7
group = 'com.mychaelstyle'
archivesBaseName = 'MyLibs'
version = '0.1.0'

repositories {
  mavenCentral()
  maven {
    url 'file:'+System.getenv('HOME')+'/.m2/repository'
  }  
}

dependencies {
  testCompile "junit:junit:4.11"
  compile 'log4j:log4j:1.2.17'
  runtime fileTree(dir: 'libs', include: '*.jar')
}

uploadArchives {
  repositories {
    mavenDeployer {
      file(System.getenv('HOME')+'/.m2/repository').mkdirs()
      repository(url: 'file:'+System.getenv('HOME')+'/.m2/repository')
    }
  }
}

jar {
  manifest {
    attributes 'Implementation-Title': 'MyLibs', 'Implementation-Version': 0.1
    attributes "Main-Class" : "com.mychaelstyle.Main"
  }
  from configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
}

task writePom << {
  pom {
    project {
      inceptionYear '2014'
      licenses {
        license {
          name 'The Apache Software License, Version 2.0'
          url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
          distribution 'repo'
        }
      }
    }
  }.writeTo("$projectDir/pom.xml")
}

findbugs {
  ignoreFailures = true
  toolVersion = "2.0.1"
  sourceSets = [sourceSets.main]
  reportsDir = file("$project.buildDir/reports/findbugs")
  effort = "max"
}

pmd {
  ignoreFailures = true
  sourceSets = [sourceSets.main]
  reportsDir = file("$project.buildDir/reports/pmd")
  ruleSets = [
    "basic",
    "braces"
  ]
}
// add CPD to check
check << {
  File outDir = new File('build/reports/pmd/')
  outDir.mkdirs()
  ant.taskdef(name: 'cpd', classname: 'net.sourceforge.pmd.cpd.CPDTask',
    classpath: configurations.pmd.asPath)
  ant.cpd(minimumTokenCount: '100', format: 'xml',
    outputFile: new File(outDir , 'cpd.xml')) {
    fileset(dir: "src/main/java") {
      include(name: '**/*.java')
    }
  }
}
// gradle wrapper
task wrapper(type: Wrapper) {
  gradleVersion = '1.9'
}