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Enter the gradle

Parameswari Ettiappan, profile picture
Parameswari Ettiappan

This document summarizes a presentation given by Ken Sipe on Gradle. It begins with an introduction of Ken Sipe and his background. It then provides an overview of existing Java build tools like Ant, Maven, and Ant with Ivy. It describes some shortcomings of Ant and Maven and introduces Gradle as a build tool built on Ant and Ivy but using Groovy as a build DSL. The document outlines key functionality of a build system and shows examples of simple Gradle build files. It discusses additional Gradle features like tasks, dependencies, plugins, and customization options.

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NFJS Software Symposium Series 2011 Ken Sipe - CTO, Gradleware Enter The Gradle
Enter the Gradle About 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
Enter the Gradle Java Build Tools javac IDE ANT Maven ANT + Ivy Gradle
Enter the Gradle Desired Functionality of a Build System n Dependency management n Versioning n Compile Java code, build jars ¨ + Other JVM Languages n Execute tests and report results, fail build on failed tests n Run quality-check tools (PMD, Findbugs, Checkstyles) n File generation (XmlBeans, Xsl, Velocity, AspectJ) n Property expansion / token substitution n Build vs. deploy vs. release n Full control when needed n Cross-platform n IDE Support n Documentation / Support
Enter the Gradle ANT nCross Platform Builds nIDE Independent nXML “script” files ¨build.xml
Enter the Gradle Maven nDefined Lifecycle nConvention for Project Structure nPlugins nDependency Management nXML based ¨pom.xml
Enter the Gradle ANT + Ivy nBuild steps defined and executed with Ant nDependencies managed with Ivy nAnt targets to install, retrieve artifacts from Ivy repository
Enter the Gradle Ant and Maven Short Comings nhard to implement an algorithm in the build file; ¨simple if or for constructs are hard to achieve, and very unnatural nhard to go beyond the foresight of the Ant/ Maven developers n"build by convention" is not supported (Ant), or ties your hands because the configuration is hard (Maven), nsupport for multi-module builds is limited nboilerplate of XML is annoying
Enter the Gradle What 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, …
Enter the Gradle What is Gradle? Gradle is Declarative Specify what... ...not how
Enter the Gradle What is Gradle? Gradle is Declarative ... without being Rigid
Enter the Gradle Example Scenarios nMany source dirs per project nDependencies per source dir nJDK per source dir nMany artifacts per project
Enter the Gradle Getting Started http://gradle.org/ ~$ gradle -t :reportTask ------------------------------------------------------------ Root Project ------------------------------------------------------------ No tasks BUILD SUCCESSFUL
Enter the Gradle Simple Build File file:build.gradle apply plugin: 'java' ~/projects/playground/gradle-nfjs$ gradle -t :reportTask ------------------------------------------------------------ Root Project ------------------------------------------------------------ :assemble - Builds all Jar, War, Zip, and Tar archives. -> :jar :build - Assembles and tests this project. -> :assemble, :check :buildDependents - Assembles and tests this project and all projects that depend on it. -> :build :buildNeeded - Assembles and tests this project and all projects it depends on. -> :build :check - Runs all checks. -> :test :classes - Assembles the main classes. -> :compileJava, :processResources :clean - Deletes the build directory. :compileJava - Compiles the main Java source. :compileTestJava - Compiles the test Java source. -> :classes :jar - Generates a jar archive with all the compiled classes.
Gradle Create 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 }
Gradle DSL 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'} }
Enter the Gradle Sample Simple Build File apply plugin:'war' version = 0.1 repositories { mavenCentral() } dependencies { compile "commons-lang:commons-lang:2.4" }
Enter the Gradle Defaults apply plugin:'war' version = 0.1 defaultTasks ‘clean’, ‘build’ repositories { mavenCentral() } dependencies { compile "commons-lang:commons-lang:2.4" }
Enter the Gradle Beyond the Basics 19
Enter 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?
Enter the Gradle Non Declarative Examples version = "1.0-${new Date().format('yyyyMMdd')}" task sources { ! sourceSets.test.allGroovy ! ! .matching {include '**/*Demo*.groovy' } ! ! .files.each { ! ! ! println “$it.absolutePath” ! } }
Enter the Gradle Extensible Object Model tasks.withType(Jar).allObjects { jarTask -> ! jarTask.osgi = new DefaultOsgiManifest() ! jarTask.doFirst { task -> ! ! importOsgiManifestIntoManifest(task) } }
Enter the Gradle Rich and Extensible API tasks.withType(Jar).allObjects { jarTask -> jarTask.manifest.mainAttributes(Provider: "CodeMentor Inc.") } tasks.withType(Compile).allObjects { compile -> compile.options.fork.executable = “$pathToJavac” } dependencies.allObjects { dependency -> throwExceptionIfDependencyIsGPL(dependency) }
Enter the Gradle Task Rules tasks.addRule("Pattern: ping<ID>") { String taskName -> if (taskName.startsWith("ping")) { task(taskName) << { // add task println "Pinging: " + (taskName - 'ping') } } } task groupPing(dependsOn: [pingServer1, pingServer2]) ~/projects/playground$ gradle gP :pingServer1 Pinging: Server1 :pingServer2 Pinging: Server2 :groupPing
Enter the Gradle Gradle Lifecycle 25
Enter the Gradle Build Phases nInitialization ¨supports single and multi-project builds ¨creates project instances for all that are taking part in the build nConfiguration ¨DAG (dependency acyclic graph) of tasks is created nExecution
Enter the Gradle setting.gradle file nexecuted during initialization phase nrequired for multi-project builds ¨in root project ndefines participating projects for builds noptional for single-project build
Enter the Gradle Order of Execution settings.gradle println ‘executed during the init phase’ build.gradle println ‘executed during the config phase’ task test << { println ‘executed during the execution phase’ }
Enter the Gradle Jump 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' } }
Enter the Gradle Gradle Dependencies 30
Enter the Gradle Runtime Dependencies dependencies { runtime group: 'org.springframework', name: 'spring-core', version: '2.5' runtime 'org.springframework:spring-core:2.5', 'org.springframework:spring-aop:2.5 }
Enter the Gradle Separate Compiles from Tests dependencies { compile 'org.springframework:spring-webmvc:3.0.0.RELEASE' testCompile 'org.springframework:spring-test:3.0.0.RELEASE' testCompile 'junit:junit:4.7' }
Enter the Gradle Transitive configurations.compile.transitive = true dependencies { compile 'org.springframework:spring-webmvc:3.0.0.RC2' testCompile 'org.springframework:spring-test:3.0.0.RC2' testCompile 'junit:junit:4.7' } Options 1: Everything runtime('org.hibernate:hibernate:3.0.5') { transitive = true } runtime group: 'org.hibernate', name: 'hibernate', version: '3.0.5', transitive: true runtime(group: 'org.hibernate', name: 'hibernate', version: '3.0.5') { transitive = true } Options 2: Selective
Enter the Gradle File Dependencies dependencies { runtime files('libs/a.jar', 'libs/b.jar') runtime fileTree(dir: 'libs', includes: ['*.jar']) }
Enter the Gradle Giving Names to Dependencies List groovy = ["org.codehaus.groovy:groovy-all:1.5.4@jar", "commons-cli:commons-cli:1.0@jar", "org.apache.ant:ant:1.7.0@jar"] List hibernate = ['org.hibernate:hibernate:3.0.5@jar', 'somegroup:someorg:1.0@jar'] dependencies { runtime groovy, hibernate }
Enter the Gradle Maven Repos repositories { mavenCentral() } Or repositories { mavenCentral name: 'single-jar-repo', urls: "http://repo.mycompany.com/jars" mavenCentral name: 'multi-jar-repos', urls: ["http://repo.mycompany.com/jars1", "http://repo.mycompany.com/jars1"] } repositories { mavenRepo urls: "http://repo.mycompany.com/maven2" } Or
Enter the Gradle Flat File Repo repositories { flatDir name: 'localRepository', dirs: 'lib' flatDir dirs: ['lib1', 'lib2'] }
Enter the Gradle Custom Gradle custom tasks and plugins 38
Enter the Gradle Custom Task task hello(type: HelloTask) task greeting(type: HelloTask) { greeting = 'greetings from new Task' } class HelloTask extends DefaultTask { def greeting = 'hello from HelloTask' @org.gradle.api.tasks.TaskAction def printGreeting() { println greeting } }
Gradle Plugins nPlugins == Build Scripts nTwo Flavors: ¨ Another build script (local or remote) (Script Plugin) ¨ A class implementing org.gradle.api.Plugin (Binary Plugin)
Gradle Applying Plugins 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'
Gradle Standard Gradle Plugins Plugin-Id applies base java-base base groovy-base java-base groovy groovy-base scala-base java-base scala scala-base war java osgi code-quality maven eclipse
Enter the Gradle Jetty Plugin Demo with CamelCase 43
Enter the Gradle Custom Plugin apply plugin: (GreetingPlugin) class GreetingPlugin implements Plugin { def void use(Project project, ProjectPluginsContainer projectPluginsHandler) { project.task('hello') << { println "Hello from the greetingPlugin" } } } ** All projects using this plugin will now have the ‘hello’ task added and all its functionality
Enter the Gradle Common Interests 45
Gradle Jar 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') } }
Enter the Gradle Explode the WAR war.doLast { ant.unzip(src: war.archivePath, dest: "$buildDir/exploded") }
Enter the Gradle Integration with ANT <project> <target name="hello" depends="intro"> <echo>Hello, from Ant</echo> </target> </project> build.xml ant.importBuild 'build.xml' hello.doFirst { println 'Here comes Ant' } task intro << { println 'Hello, from Gradle'} build.gradle ~/projects/playground/gradle/ant$ gradle hello :intro Hello, from Gradle :hello Here comes Ant [ant:echo] Hello, from Ant output:
Enter the Gradle Integration 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
Enter the Gradle Running Processes from Gradle ant.java(classname: 'com.my.classname', fork: true, classpath: "${sourceSets.main.runtimeClasspath.asPath}")
Enter the Gradle Cobertura (1/2) apply plugin:'java' def cobSerFile="${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") } } }
Enter the Gradle Cobertura (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) } }
Enter the Gradle Special Environments // File: build.gradle loadConfiguration() task printProps << { println "serverName: $config.serverName" println "mail.server: $config.mail.server" println "mail.port: $config.mail.port" } def loadConfiguration() { def environment = hasProperty('env') ? env : 'dev' setProperty 'environment', environment println "Environment is set to $environment" def configFile = file('config.groovy') def config = new ConfigSlurper(environment).parse(configFile.toURL()) setProperty 'config', config } // File: config.groovy mail { server = 'localhost' port = 25 } environments { dev { serverName = 'http://localhost:9090' } test { serverName = 'http://testserver' mail { server = 'mail.testserver' } } prod { serverName = 'http://www.nfjs.com' mail { port = 552 server = 'mail.host.com' } } } thanks to mrhaki for the tip! ~/projects/playground/gradle/env$ gradle -q -Penv=test pP Environment is set to test serverName: http://testserver mail.server: mail.testserver mail.port: 25
Enter the Gradle wrapper task wrapper(type: Wrapper) { gradleVersion = '0.8' } build build.gradle gradle-wrapper.jar gradle-wrapper.properties gradlew.bat gradlew task execution results:
Enter the Gradle •Gradle is version 1.0-Milestone2a! but •It is very powerful! Summary
Enter the Gradle n Closing and Q&A ¨Please fill out the session evaluation ¨Ken Sipe n ken.sipe@gradleware.com n kensipe.blogspot.com n twitter: @kensipe Summary

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Enter the gradle

  • 1. NFJS Software Symposium Series 2011 Ken Sipe - CTO, Gradleware Enter The Gradle
  • 2. Enter the Gradle About 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
  • 3. Enter the Gradle Java Build Tools javac IDE ANT Maven ANT + Ivy Gradle
  • 4. Enter the Gradle Desired Functionality of a Build System n Dependency management n Versioning n Compile Java code, build jars ¨ + Other JVM Languages n Execute tests and report results, fail build on failed tests n Run quality-check tools (PMD, Findbugs, Checkstyles) n File generation (XmlBeans, Xsl, Velocity, AspectJ) n Property expansion / token substitution n Build vs. deploy vs. release n Full control when needed n Cross-platform n IDE Support n Documentation / Support
  • 5. Enter the Gradle ANT nCross Platform Builds nIDE Independent nXML “script” files ¨build.xml
  • 6. Enter the Gradle Maven nDefined Lifecycle nConvention for Project Structure nPlugins nDependency Management nXML based ¨pom.xml
  • 7. Enter the Gradle ANT + Ivy nBuild steps defined and executed with Ant nDependencies managed with Ivy nAnt targets to install, retrieve artifacts from Ivy repository
  • 8. Enter the Gradle Ant and Maven Short Comings nhard to implement an algorithm in the build file; ¨simple if or for constructs are hard to achieve, and very unnatural nhard to go beyond the foresight of the Ant/ Maven developers n"build by convention" is not supported (Ant), or ties your hands because the configuration is hard (Maven), nsupport for multi-module builds is limited nboilerplate of XML is annoying
  • 9. Enter the Gradle What 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, …
  • 10. Enter the Gradle What is Gradle? Gradle is Declarative Specify what... ...not how
  • 11. Enter the Gradle What is Gradle? Gradle is Declarative ... without being Rigid
  • 12. Enter the Gradle Example Scenarios nMany source dirs per project nDependencies per source dir nJDK per source dir nMany artifacts per project
  • 13. Enter the Gradle Getting Started http://gradle.org/ ~$ gradle -t :reportTask ------------------------------------------------------------ Root Project ------------------------------------------------------------ No tasks BUILD SUCCESSFUL
  • 14. Enter the Gradle Simple Build File file:build.gradle apply plugin: 'java' ~/projects/playground/gradle-nfjs$ gradle -t :reportTask ------------------------------------------------------------ Root Project ------------------------------------------------------------ :assemble - Builds all Jar, War, Zip, and Tar archives. -> :jar :build - Assembles and tests this project. -> :assemble, :check :buildDependents - Assembles and tests this project and all projects that depend on it. -> :build :buildNeeded - Assembles and tests this project and all projects it depends on. -> :build :check - Runs all checks. -> :test :classes - Assembles the main classes. -> :compileJava, :processResources :clean - Deletes the build directory. :compileJava - Compiles the main Java source. :compileTestJava - Compiles the test Java source. -> :classes :jar - Generates a jar archive with all the compiled classes.
  • 15. Gradle Create 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 }
  • 16. Gradle DSL 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'} }
  • 17. Enter the Gradle Sample Simple Build File apply plugin:'war' version = 0.1 repositories { mavenCentral() } dependencies { compile "commons-lang:commons-lang:2.4" }
  • 18. Enter the Gradle Defaults apply plugin:'war' version = 0.1 defaultTasks ‘clean’, ‘build’ repositories { mavenCentral() } dependencies { compile "commons-lang:commons-lang:2.4" }
  • 19. Enter the Gradle Beyond the Basics 19
  • 20. Enter 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?
  • 21. Enter the Gradle Non Declarative Examples version = "1.0-${new Date().format('yyyyMMdd')}" task sources { ! sourceSets.test.allGroovy ! ! .matching {include '**/*Demo*.groovy' } ! ! .files.each { ! ! ! println “$it.absolutePath” ! } }
  • 22. Enter the Gradle Extensible Object Model tasks.withType(Jar).allObjects { jarTask -> ! jarTask.osgi = new DefaultOsgiManifest() ! jarTask.doFirst { task -> ! ! importOsgiManifestIntoManifest(task) } }
  • 23. Enter the Gradle Rich and Extensible API tasks.withType(Jar).allObjects { jarTask -> jarTask.manifest.mainAttributes(Provider: "CodeMentor Inc.") } tasks.withType(Compile).allObjects { compile -> compile.options.fork.executable = “$pathToJavac” } dependencies.allObjects { dependency -> throwExceptionIfDependencyIsGPL(dependency) }
  • 24. Enter the Gradle Task Rules tasks.addRule("Pattern: ping<ID>") { String taskName -> if (taskName.startsWith("ping")) { task(taskName) << { // add task println "Pinging: " + (taskName - 'ping') } } } task groupPing(dependsOn: [pingServer1, pingServer2]) ~/projects/playground$ gradle gP :pingServer1 Pinging: Server1 :pingServer2 Pinging: Server2 :groupPing
  • 25. Enter the Gradle Gradle Lifecycle 25
  • 26. Enter the Gradle Build Phases nInitialization ¨supports single and multi-project builds ¨creates project instances for all that are taking part in the build nConfiguration ¨DAG (dependency acyclic graph) of tasks is created nExecution
  • 27. Enter the Gradle setting.gradle file nexecuted during initialization phase nrequired for multi-project builds ¨in root project ndefines participating projects for builds noptional for single-project build
  • 28. Enter the Gradle Order of Execution settings.gradle println ‘executed during the init phase’ build.gradle println ‘executed during the config phase’ task test << { println ‘executed during the execution phase’ }
  • 29. Enter the Gradle Jump 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' } }
  • 30. Enter the Gradle Gradle Dependencies 30
  • 31. Enter the Gradle Runtime Dependencies dependencies { runtime group: 'org.springframework', name: 'spring-core', version: '2.5' runtime 'org.springframework:spring-core:2.5', 'org.springframework:spring-aop:2.5 }
  • 32. Enter the Gradle Separate Compiles from Tests dependencies { compile 'org.springframework:spring-webmvc:3.0.0.RELEASE' testCompile 'org.springframework:spring-test:3.0.0.RELEASE' testCompile 'junit:junit:4.7' }
  • 33. Enter the Gradle Transitive configurations.compile.transitive = true dependencies { compile 'org.springframework:spring-webmvc:3.0.0.RC2' testCompile 'org.springframework:spring-test:3.0.0.RC2' testCompile 'junit:junit:4.7' } Options 1: Everything runtime('org.hibernate:hibernate:3.0.5') { transitive = true } runtime group: 'org.hibernate', name: 'hibernate', version: '3.0.5', transitive: true runtime(group: 'org.hibernate', name: 'hibernate', version: '3.0.5') { transitive = true } Options 2: Selective
  • 34. Enter the Gradle File Dependencies dependencies { runtime files('libs/a.jar', 'libs/b.jar') runtime fileTree(dir: 'libs', includes: ['*.jar']) }
  • 35. Enter the Gradle Giving Names to Dependencies List groovy = ["org.codehaus.groovy:groovy-all:1.5.4@jar", "commons-cli:commons-cli:1.0@jar", "org.apache.ant:ant:1.7.0@jar"] List hibernate = ['org.hibernate:hibernate:3.0.5@jar', 'somegroup:someorg:1.0@jar'] dependencies { runtime groovy, hibernate }
  • 36. Enter the Gradle Maven Repos repositories { mavenCentral() } Or repositories { mavenCentral name: 'single-jar-repo', urls: "http://repo.mycompany.com/jars" mavenCentral name: 'multi-jar-repos', urls: ["http://repo.mycompany.com/jars1", "http://repo.mycompany.com/jars1"] } repositories { mavenRepo urls: "http://repo.mycompany.com/maven2" } Or
  • 37. Enter the Gradle Flat File Repo repositories { flatDir name: 'localRepository', dirs: 'lib' flatDir dirs: ['lib1', 'lib2'] }
  • 38. Enter the Gradle Custom Gradle custom tasks and plugins 38
  • 39. Enter the Gradle Custom Task task hello(type: HelloTask) task greeting(type: HelloTask) { greeting = 'greetings from new Task' } class HelloTask extends DefaultTask { def greeting = 'hello from HelloTask' @org.gradle.api.tasks.TaskAction def printGreeting() { println greeting } }
  • 40. Gradle Plugins nPlugins == Build Scripts nTwo Flavors: ¨ Another build script (local or remote) (Script Plugin) ¨ A class implementing org.gradle.api.Plugin (Binary Plugin)
  • 41. Gradle Applying Plugins 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'
  • 42. Gradle Standard Gradle Plugins Plugin-Id applies base java-base base groovy-base java-base groovy groovy-base scala-base java-base scala scala-base war java osgi code-quality maven eclipse
  • 43. Enter the Gradle Jetty Plugin Demo with CamelCase 43
  • 44. Enter the Gradle Custom Plugin apply plugin: (GreetingPlugin) class GreetingPlugin implements Plugin { def void use(Project project, ProjectPluginsContainer projectPluginsHandler) { project.task('hello') << { println "Hello from the greetingPlugin" } } } ** All projects using this plugin will now have the ‘hello’ task added and all its functionality
  • 45. Enter the Gradle Common Interests 45
  • 46. Gradle Jar 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') } }
  • 47. Enter the Gradle Explode the WAR war.doLast { ant.unzip(src: war.archivePath, dest: "$buildDir/exploded") }
  • 48. Enter the Gradle Integration with ANT <project> <target name="hello" depends="intro"> <echo>Hello, from Ant</echo> </target> </project> build.xml ant.importBuild 'build.xml' hello.doFirst { println 'Here comes Ant' } task intro << { println 'Hello, from Gradle'} build.gradle ~/projects/playground/gradle/ant$ gradle hello :intro Hello, from Gradle :hello Here comes Ant [ant:echo] Hello, from Ant output:
  • 49. Enter the Gradle Integration 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
  • 50. Enter the Gradle Running Processes from Gradle ant.java(classname: 'com.my.classname', fork: true, classpath: "${sourceSets.main.runtimeClasspath.asPath}")
  • 51. Enter the Gradle Cobertura (1/2) apply plugin:'java' def cobSerFile="${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") } } }
  • 52. Enter the Gradle Cobertura (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) } }
  • 53. Enter the Gradle Special Environments // File: build.gradle loadConfiguration() task printProps << { println "serverName: $config.serverName" println "mail.server: $config.mail.server" println "mail.port: $config.mail.port" } def loadConfiguration() { def environment = hasProperty('env') ? env : 'dev' setProperty 'environment', environment println "Environment is set to $environment" def configFile = file('config.groovy') def config = new ConfigSlurper(environment).parse(configFile.toURL()) setProperty 'config', config } // File: config.groovy mail { server = 'localhost' port = 25 } environments { dev { serverName = 'http://localhost:9090' } test { serverName = 'http://testserver' mail { server = 'mail.testserver' } } prod { serverName = 'http://www.nfjs.com' mail { port = 552 server = 'mail.host.com' } } } thanks to mrhaki for the tip! ~/projects/playground/gradle/env$ gradle -q -Penv=test pP Environment is set to test serverName: http://testserver mail.server: mail.testserver mail.port: 25
  • 54. Enter the Gradle wrapper task wrapper(type: Wrapper) { gradleVersion = '0.8' } build build.gradle gradle-wrapper.jar gradle-wrapper.properties gradlew.bat gradlew task execution results:
  • 55. Enter the Gradle •Gradle is version 1.0-Milestone2a! but •It is very powerful! Summary
  • 56. Enter the Gradle n Closing and Q&A ¨Please fill out the session evaluation ¨Ken Sipe n ken.sipe@gradleware.com n kensipe.blogspot.com n twitter: @kensipe Summary