Groovy Maven Builds

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Evgeny GoldinThomson Reuters@evgeny_goldin

Groovy Maven Builds

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Evgeny Goldin

Software Developer – 12 yearsDev : C++ => Perl => Java => Groovy /

ScalaCM : Ant => Maven => Gradle OS : Artifactory, TeamCity, JenkinsWrite for GroovyMag and Methods & ToolsMaven plugins, GCommons library

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Maven state of affairs:

Maven is rarely used to its fullest potential“maven-antrun-plugin” is overusedNo community around plugins

http://maven.apache.org/pluginshttp://mojo.codehaus.org/plugins.html

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About this session:

Maven can be made better! .. especially when you use GroovyWe’ll see how:

GMavenPolyglot MavenGroovy MOJOs + Demo

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Maven and Gradle

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Gradle - dynamic build applications.

Maven - repeatable build processes.

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Maven makes it awkward to ..

“if” a model composition / plugin executionSpecify dynamic value when configuring a

pluginPut your own logic in POMModify existing plugins behaviorPass in-memory information between plugins

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Is the game over? Or can builds become applications?

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Use case – Build Metadata

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http://goo.gl/i0ldH

Ant: ~60 LOC (100 total)

3 files

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http://goo.gl/GdS6y

Groovy: ~10

LOC (30 total)

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Compiles Groovy codeExecutes Groovy codeGenerates Java Stubs, required for MOJOsJoin Compilation with Java (sort of)http://pinboard.in/u:evgenyg/t:gmaven/

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<goal>execute</goal>

Runs Groovy codeRuns Groovy scriptRuns Groovy class

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http://goo.gl/8DOe2

Get IDE support back!

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<goal>execute</goal>

Runs Groovy codeRuns Groovy scriptRuns Groovy classMavenProject MavenSessionMaven’s “ServletContext”

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MavenProject – Static Info

http://goo.gl/3Ve31CoordinatesPropertiesArtifactsDependenciesBasedirRemote repositories

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MavenSession – Runtime Info

http://goo.gl/Kh8iLCurrent MavenProjectBuild start timeUser propertiesSystem propertiesGoalsLocal repository

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GMaven



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Use case – Build Metadata

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http://evgeny-goldin.com/wiki/Maven-about-plugin

<plugin>

<groupId>com.goldin.plugins</groupId>

<artifactId>maven-about-plugin</artifactId>

<version>0.2.3.4-about-fix</version>

</plugin>

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http://evgeny-goldin.com/wiki/Gradle-about-plugin

apply plugin: 'about‘

...

about { dumpDependencies = true }

...

assemble.doLast { about.execute() }

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something.jar/META-INF/about.txt

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?

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Polyglot Maven

https://docs.sonatype.org/display/PMAVEN/https://github.com/sonatype/polyglot-mavengit clone + mvn clean installtranslate pom.xml pom.groovy

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http://goo.gl/U5eqr

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http://goo.gl/av0Dx

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Polyglot Maven

Groovy syntactic sugar to Maven POMCouldn’t find a way to

Attach a code to a lifecycleLocate MavenProject and MavenSession

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Polyglot Maven


pluginPut your own logic in POM“validate” phase

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Groovy MOJOs

ReusableMore exposure to Maven runtime

environmenthttp://pinboard.in/u:evgenyg/t:mojo/

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Use case – Duplicates

http://goo.gl/ZFRvp

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http://www.flickr.com/photos/rohdesign/3534506648/ (rohdesign.com)

https://github.com/evgeny-goldin/gmaven-samples

Duplicates Finder

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http://evgeny-goldin.com/wiki/Duplicates-finder-plugin

<plugin>

<groupId>com.goldin.plugins</groupId>

<artifactId>duplicates-finder-plugin</artifactId>

<version>0.2.3.4</version>

</plugin>

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http://evgeny-goldin.com/wiki/Gradle-duplicates-plugin

apply plugin: 'duplicates'

...

duplicates { configurations = [ 'compile', 'runtime' ] }

...

>gradle duplicates

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Maven PluginsDuplicates found in:

-=-= [org.codehaus.plexus:plexus-classworlds:jar:2.2.2:compile, classworlds:classworlds:jar:1.1:compile] =-=-

-=-= [commons-logging:commons-logging-api:jar:1.1:compile, commons-logging:commons-logging:jar:1.1.1:compile] =-=-

-=-= [nekohtml:xercesMinimal:jar:1.9.6.2:compile, xerces:xercesImpl:jar:2.8.1:compile] =-=-

-=-= [nekohtml:nekohtml:jar:1.9.6.2:compile, net.sourceforge.nekohtml:nekohtml:jar:1.9.9:compile] =-=-

-=-= [commons-beanutils:commons-beanutils:jar:1.8.0:compile, commons-collections:commons-collections:jar:3.2.1:compile] =-=-

Google GuiceDuplicates found in:

-=-= [com.google.inject:guice:jar:3.0-SNAPSHOT:compile, com.google.inject:guice:jar:no_deps:3.0-SNAPSHOT:compile] =-=-

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CodeNarcDuplicates found in:

-=-= [org.codenarc:CodeNarc:0.14, org.codehaus.groovy:groovy-all:1.7.5] =-=-

--- [org.codehaus.groovy.ast.expr.RegexExpression]

--- [org.codehaus.groovy.transform.powerassert.Value]

--- [org.codehaus.groovy.transform.powerassert.ValueRecorder]

Test CompileDuplicates found in:

-=-= [junit:junit-dep:4.8.2, junit:junit:4.8.2] =-=-

-=-= [org.hamcrest:hamcrest-core:1.2, junit:junit:4.8.2] =-=-

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Groovy MOJOs

A Groovy class + @AnnoMojo

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Groovy MOJOs

A Groovy class + @AnnoMojoDynamic properties

http://goo.gl/UqBqn

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Groovy MOJOs


http://goo.gl/UqBqn

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Groovy MOJOs


http://goo.gl/xV73v

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Groovy MOJOs

A Groovy class + @AnnoMojoDynamic propertiesNew Maven properties

http://goo.gl/tEgQa

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Groovy MOJOs

Other plugins can be extended or invokedTheir initialization though, may not work wellhttp://github.com/TimMoore/mojo-executor

http://goo.gl/tEgQa

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mojo-executor

http://goo.gl/CT6AQ

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Groovy MOJOs

A Groovy class + @AnnoMojoDynamic propertiesNew Maven propertiesOther plugins can be extended or invokedThat’s how you deal with Maven!

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Maven 3 vs. Maven 2

IE9 vs. IE6Maven 3: Aether, mojo-executor, better Mojo

supportMaven 3 Mojos will not run on Maven 2Maven 2 support will seriously hold you back

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Groovy MOJOs



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So ..

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So ..GMaven - custom build behavior on any

phasePolyglot Maven is a Groovy syntactic sugar Groovy Mojos is the way to make it your

way

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So .. GMaven - custom build behavior on any

phasePolyglot Maven is a Groovy syntactic sugar Groovy Mojos is the way to make it your wayCreating build applications with Maven –

doable!Maven is not a solution, but a platform

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So .. GMaven - custom build behavior on any

phasePolyglot Maven is a Groovy syntactic sugar Groovy Mojos is the way to make it your wayCreating build applications with Maven –

doable!Maven is not a solution, but a platformWe don’t have to be limited by existing pluginsPerl, IDEA, Jenkins, jQuery, Grails, Gradle ..

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Maven Plugins

http://evgeny-goldin.com/wiki/Maven-pluginsmaven-copy-pluginmaven-jenkins-pluginmaven-assert-plugin maven-mail-pluginmaven-about-pluginduplicates-finder-plugin

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Maven Plugins

http://evgeny-goldin.com/wiki/Maven-pluginsmaven-copy-pluginmaven-jenkins-pluginmaven-assert-plugin maven-mail-pluginmaven-about-pluginduplicates-finder-plugin

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Gradle Plugins

http://evgeny-goldin.com/wiki/Gradle-plugins “About” plugin“Duplicates” plugin“CodeNarc” plugin

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Links

@evgeny_goldinhttp://evgeny-goldin.comhttp://pinboard.in/u:evgenyg/t:gmaven/http://pinboard.in/u:evgenyg/t:mojo/http://pinboard.in/u:evgenyg/t:maven3/

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Technology

Groovy Maven Builds