Issue2351

Hello, 

 I'm still trying to understand how I can create Lib.jar from the Lib/ directory that comes with the "Core" installation. I want to make a compact Jython installation without many files in the Lib directory. I also do not want to make changes to my scripts, so I like to use "*" to pick up modules, instead of explicit import of separate classes as in the case of single "jython.jar" file.

Is any procedure I should follow to create Lib.jar from the the Lib/ directory for Jython 2.7?

So Clamp (https://github.com/jythontools/clamp) partially addresses this, but doesn't currently offer a facility to exclude files. On #jython on freenode, this has also been discussed with reference to stripping out unnecessary classes from included jar files for a given application - someone may not need Python networking via ssl/socket/select, so no need for BouncyCastle, ICU4J, and Netty. Reduces Jython to about 9 MB...

I suggest you file this issue against Clamp as an RFE - maybe we can figure what could work well.

Another possibility is to use Gradle to exclude classes: 
https://docs.gradle.org/current/dsl/org.gradle.api.tasks.bundling.Jar.html#org.gradle.api.tasks.bundling.Jar:excludes

Note that we plan to move Jython to using Gradle, instead of Ant.