Rocking the Gradle

Ken Sipe Rocking The Gradle Rocking the GradleAbout Speaker Developer: Embedded, C++, Java, Groovy, Grails, C#, Objective C Speaker: JavaOne 2009 Rock Star, NFJS, JAX Microsoft MCP Sun Certified Java 2 Architect Master of Scrums Agile Coach Instructor: VisiBroker CORBA Rational Rose, OOAD http://kensipe.blogspot.com/ http://del.icio.us/kensipe twitter: @kensipe ken.sipe@gradleware.com Rocking the GradleJava Build Tools javac IDE ANT Maven ANT + Ivy Gradle Rocking the GradleGradle Book Rocking the GradleWhat is Gradle? nBuilt on top of Ant + Ivy nBuild DSL written in Groovy nUses Groovy AntBuilder ¨ant.compile, ant.jar nPlugins define common tasks to build different types of projects ¨java, groovy, war, … Rocking the GradleWhat is Gradle? Gradle is Declarative Specify what... ...not how Rocking the Gradle Quick Demo Rocking the GradleCreate a task createTask('hello') { // depreciated println 'Hello World' } task hello << { println 'Hello world!' } task intro(dependsOn: hello) << {   println "I'm Gradle"  }  project.tasks.add('someTask').doFirst { // do something } Rocking the GradleDSL Syntax And Tasks task hello << { println 'Hello' } // direct API access is fine for single statements hello.dependsOn otherTask // for multiple access we prefer closure syntax hello { onlyIf { day == 'monday' } dependsOn otherTask } // combining Configuration and Actions task hello { onlyIf { day == 'monday' } doFirst {println 'Hello'} } Rocking the GradleSample Simple Build File apply plugin:'war' version = 0.1 repositories { mavenCentral() } dependencies { compile "commons-lang:commons-lang:2.4" } Rocking the Gradle Beyond the Basics Rocking the Gradle Does it really matter if your build system uses XML or Groovy? Can there be aspects of the build that are difficult from a declarative perspective? Rocking the GradleNon Declarative Examples version = "1.0-${new Date().format('yyyyMMdd')}" task sources { ! sourceSets.test.allGroovy ! ! .matching {include '**/*Demo*.groovy' } ! ! .files.each { ! ! ! println “$it.absolutePath” ! } } Rocking the GradleExtensible Object Model tasks.withType(Jar).allObjects { jarTask -> ! jarTask.osgi = new DefaultOsgiManifest() ! jarTask.doFirst { task -> ! ! importOsgiManifestIntoManifest(task) } } Rocking the GradleJump Between Phases task release(dependsOn: assemble) << { println 'We release now' } build.taskGraph.whenReady { taskGraph -> if (taskGraph.hasTask(':release')) { version = '1.0' } else { version = '1.0-SNAPSHOT' } } Rocking the Gradle What makes Gradle Rock! Rocking the Gradle #1 - Gradle Wrapper Rocking the GradleGradle Wrapper enables enterprise wide project conventions Rocking the GradleGradle Wrapper enables bootstrap to a working build Rocking the GradleContinuous Delivery Best Practice Rocking the Gradle #2 - Multi-Project Builds Rocking the GradleMulti-Project nDependencies ¨Source Level nIncremental Builds nLess Hoops! Rocking the Gradle #3 - Integration with ANT and Maven Rocking the GradleIntegration with Maven nIntegration with Maven repositories ¨autogeneration of pom.xml ¨install to local Maven repo ¨deploy to any remote Repo ¨full maven metadata generation nIntegration of Maven builds in the future Rocking the GradleIntegration with ANT Hello, from Ant build.xml ant.importBuild 'build.xml' hello.doFirst { println 'Here comes Ant' } task intro << { println 'Hello, from Gradle'} build.gradle ~/projects/playground/gradle/ant$ gradle hello :intro Hello, from Gradle :hello Here comes Ant [ant:echo] Hello, from Ant output: Rocking the GradleRunning Processes from Gradle ant.java(classname: 'com.my.classname', fork: true, classpath: "${sourceSets.main.runtimeClasspath.asPath}") Rocking the GradleCobertura (1/2) apply plugin:'java' def cobSerFile="${project.buildDir}/cobertura.ser" def srcOriginal="${sourceSets.main.classesDir}" def srcCopy="${srcOriginal}-copy" repositories { mavenCentral() } dependencies { testRuntime 'net.sourceforge.cobertura:cobertura:1.9.3' testCompile 'junit:junit:4.5' } test.doFirst { ant { delete(file:cobSerFile, failonerror:false) delete(dir: srcCopy, failonerror:false) taskdef(resource:'tasks.properties', classpath: configurations.testRuntime.asPath) copy(todir: srcCopy) { fileset(dir: srcOriginal) } 'cobertura-instrument'(datafile:cobSerFile) { fileset(dir: srcOriginal, includes:"my/classes/**/*.class", excludes:"**/*Test.class") } } } Rocking the GradleCobertura (2/2) test { // pass information on cobertura datafile to your testing framework // see information below this code snippet } test.doLast { if (new File(srcCopy).exists()) { // replace instrumented classes with backup copy again ant { delete(file: srcOriginal) move(file: srcCopy, tofile: srcOriginal) } // create cobertura reports ant.'cobertura-report'(destdir:"${project.buildDirName}/test-results", format:'html', srcdir:"src/main/java", datafile:cobSerFile) } } Rocking the Gradle #4 - Incremental Builds Rocking the Gradle #5 - Boot Strapping Build Scripts GradleApplying n Any gradle script can be a plugin. n Binary plugins must be in the build script classpath ¨can have id's (meta properties in the jar). ¨will learn later how to add elements to the build script classpath. ¨The build-in plugins are by default in the build script classpath. apply from: 'otherScript.gradle' apply from: 'http://mycomp.com/otherScript.gradle' apply plugin: org.gradle.api.plugins.JavaPlugin apply plugin: 'java' Rocking the GradleJar n Jars can be added to the buildscript classpath ¨Custom build logic ¨Plugins ¨Helper classes (e.g. commons-math) buildscript { repositories { mavenCentral() } dependencies { classpath "commons-lang:commons-lang:3.1" classpath files('lib/foo.jar') } } Rocking the Gradle #6 - Corporate Defined Conventions Rocking the GradleProject Standards Rocking the Gradle #7 - Rich Model with Implicit Depends Rocking the GradleImplicit Depends Rocking the Gradle #8 - Concise Express what is different... ...Not all the details of how your build is the same Rocking the Gradle #9 - Gradle is Groovy Rocking the Gradle Gradle Rocks! Rocking the Gradle n Get More Info: ¨http://forums.gradle.org ¨http://gradleware.com ¨Road Map n http://www.gradle.org/roadmap Summary Rocking the Gradle n Closing and Q&A ¨Please fill out the session evaluation ¨Ken Sipe n ken.sipe@gmail.com n kensipe.blogspot.com n twitter: @kensipe Summary