Re: [Jython-dev] I'd like to contribute

[Paul D. <pau...@ds...>]

On Saturday 18 November 2006 02:24, Charlie Groves wrote:
> hmm, that line is in an else block with after an 'if os.name ==
> 'java':'.  os.name is assigned in javaos.py.  Does that file exist in
> your dist/Lib?  

yes.

> Is dist/Lib in sys.path for you? 

To answer this question I had to go back to the documentation and figure out 
exactly how the sys.path stuff works.  

In the DeveloperGuide it says to make the following script to run jython:

--------------------
#!/bin/sh
exec java -Dpython.home=<path>/dist/ -jar <path>/dist/jython.jar $*
--------------------

Well, by going down this route I get into many problems which would take a 
while to explain!  What I have done instead is the following:

--------------------
exec 
java -Dpython.path=/home/pdrummond/bin/Python-2.3.6/Lib -jar /home/pdrummond/src/jython/2.3/dist/jython.jar 
$*
--------------------

Rather than specify python.home I have just set the python path to point to 
the python lib directory.  This works as I can sucessfully run 
dist/Lib/test/regrtest.py now.  However, when I inspect the sys.path in the 
jython console, the output is weird:

----------------------------
dist> jython
Jython 2.3a0 on java1.5.0_08 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> import sys.path; print sys.path
['', '/home/pdrummond/src/jython/2.3/dist/.', '/home/pdrummond/src/jython/2.3/dist/Lib', '/home/pdrummond/bin/Python-2.3.6/Lib', '/home/pdrummond/src/jython/2.3/dist/__classpath__']
>>>
----------------------------
Looks like "/home/pdrummond/src/jython/2.3/dist is being prefixed to 
everything!  If I remove the python.path property from the exec script and 
instead specify python.path in the registry file then everything works fine:

----------------------------
bash> cat bin/jython
#!/bin/sh
exec java -jar /home/pdrummond/src/jython/2.3/dist/jython.jar $*

bash> head 2.3/dist/registry
# Python Registry -*- ksh -*-
# This default registry sets many common options to their default values
# All of these settings could be erased with no change in behavior
python.path=/home/pdrummond/Python-2.3.6/Lib

bash> jython
Jython 2.3a0 on java1.5.0_08 (JIT: null)
>>> import sys;print sys.path
['', '.', '/home/pdrummond/src/jython/2.3/dist/Lib', '/home/pdrummond/Python-2.3.6/Lib', '__classpath__']
>>>     
----------------------------

Note that I must put the registry file in "dist" for jython to pick it up.  

To summerize, specifying python.path in the registry works but specifying it 
as a property doesn't!  

Cheers,
Paul Drummond