gradle: custom jar task - jar

Question

I feel like I am missing something obvious here, but I can't seem to find it.
I have a project, where I want my package structure like so
/src
/webapp
/webapp-package-1
/webapp-package-2
/iface
/iface-package-1
/iface-package-2
I want to define a task that packages up the classes for iface and makes it into a jar. So I followed the user guide here: http://www.gradle.org/0.8/docs/userguide/userguide_single.html#configureSourceSet (I am using version 0.8).
I now have this,
sourceSets {
main {
java {
srcDir 'src'
}
resources {
srcDir 'src'
}
}
intTest {
java {
srcDir 'src/iface/'
}
resources {
srcDir 'src'
}
}
test {
java {
srcDir 'test'
}
resources {
srcDir 'src'
}
}
}
task intTestJar(type: Jar, dependsOn: intTestClasses) {
from sourceSets.intTest.classes
}
And can verify that the classes in intTest are being built appropriately in /build/classes/intTest. However, trying to invoke the intTestJar always gives me this warning:
[ant:jar] Warning: skipping jar archive C:\workspace\foo\build\libs\foo-1.0.jar because no files were included.
I don't understand this, because the classes are being created successfully. Also, the full build task creates the entire jar successfully.
Ideas?

Answer 1

This solution appears to work with the latest version of Gradle(0.9.2). I ran the intTestJar task exactly as shown above(adding the java plugin of course) on this file tree:
└── iface
└── ifacePackageOne
├── Test.java
└── testFile.txt
and here's the resulting jar structure:
├── META-INF
│   └── MANIFEST.MF
└── iface
└── ifacePackageOne
├── Test.class
└── testFile.txt
So the short answer - try a newer version of Gradle. http://gradle.org/