gradle - how do I build a jar with a lib dir with other jars in it?

Question

In gradle - how can I embed jars inside my build output jar in the lib directory (specifially the lib/enttoolkit.jar and lib/mail.jar)?

Answer 1

If you have all the jars inside a directory (lets call it libs) in your project, you only need this:

jar {     into('lib') {         from 'libs'     } } 

I guess it is more likely that these jars are dependencies of some sort. Then you could do it like this:

configurations {     // configuration that holds jars to copy into lib     extraLibs } dependencies {     extraLibs 'org.something:something-dep1:version'     extraLibs 'org.something:something-dep2:version' }  jar {     into('lib') {         from configurations.extraLibs     } } 

Answer 2

Lifted verbatim from: http://docs.codehaus.org/display/GRADLE/Cookbook#Cookbook-Creatingafatjar

Gradle 0.9:

jar {     from configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } } 

Gradle 0.8:

jar.doFirst {     for(file in configurations.compile) {         jar.merge(file)     } } 

The above snippets will only include the compile dependencies for that project, not any transitive runtime dependencies. If you also want to merge those, replace configurations.compile with configurations.runtime.

EDIT: only choosing jars you need

Make a new configuration, releaseJars maybe

configurations {     releaseJars } 

Add the jars you want to that configuration

dependencies {     releaseJars group: 'javax.mail', name: 'mail', version: '1.4'     //etc } 

then use that configuration in the jar task outlined above.