CLAMP java libs routing is messed up.

[smaudet]

CLAMP's find_jython_jars routine is messed up (and completely bogus against current jython-ssl tree).

Instead of implementing bad logic to find jars based upon an arbitrary executable path, just search the current classpath. It is not clamp's responsibility to call jython correctly - this is already done by the callee or wrapper script, and everything necessary is already on that classpath.

[jimbaker]

find_jython_jars is based on comparable functionality in the jython shell script/jython.bat for setting up the classpath. At least in my testing on Ubuntu and OSX, it works with the jython-ssl branch, since Clamp is not so useful without at least easy_install support (currently, only jython-ssl supports easy_install, although https://github.com/jimbaker/socket-reboot should hopefully fix this real soon now :), just a bit more work).

But what I think will be a much better solution is if the desired jars to be copied in are passed into the singlejar command. There is in fact some support for this idea in the current --classpath option, but it's not really the right approach as used there. In particular, Clamp now picks up all jars that are included in the clamped code through a discovery approach and ensures these are added to sys.path.

So let's take advantage of the warning about being "pre-alpha, API subject to change" and have the --classpath option set exclusively all jars to be included besides what's discovered in clamped packages. In particular, with --classpath set the find_jython_jars function will not be run.

[smaudet]

There were three problem areas I noted after I managed to get this working (currently shim fixes only in my local branch):

find_jython_jars && find_jython_lib_files in clamp.build

The third area was a general set of pathing problems in Jython, I will report an issue against Jython rather than against clamp. However the functions in question are:

isStandalone in org.python.core.PySystemState
and
makeBundle in org.python.modules.zipimport.zipimporter