Directory entries are not included in the generated jar file

[TheImplementer]

It looks like jar files generated using the groovy_library rule, unlike the ones generated with the java_library one, don't contain directory entries.

For instance, given a java class Test.class under the com.example package, the resulting jar file would contain the following entries (excluding the META-INF directory):

• com/
• com/example/
• com/example/Test.class

At runtime, the following code will then work as expected, returning a URL to the jar file:

ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();
URL url = systemClassLoader.getResource("com/example");

The same does not work (the URL returned is null) with a jar generated with the groovy_library rule because the only entry in it is: com/example/Test.class.