Question

I have runtime dependencies on some external jars that I would like to ‘rejar’ into a single jar. These external dependencies are stored in an external_jars directory, and I’d like to be able to not have to list them all (i.e., not to need to change my build scripts if my dependencies change). Any thoughts?

Google gave me a good answer on how to do this – if you don’t mind listing out each jar as a dependency:

http://markmail.org/message/zijbwm46maxzzoo5

Roughly, I want something along the lines of the following, which would combine all jars in the lib directory into out.jar (with some sane overwrite rules).

jar -combine -out out.jar -in lib/*.jar 

Answer 1

Just use zipgroupfileset with the Ant Zip task

<zip destfile='out.jar'>     <zipgroupfileset dir='lib' includes='*.jar'/> </zip> 

This will flatten all included jar libraries’ content.