[Distutils] virtual-python.py, sys.prefix, and Mac
ronaldoussoren at mac.com
Wed Sep 19 20:40:54 CEST 2007
On 19 Sep, 2007, at 19:23, Ian Bicking wrote:
> Ronald Oussoren wrote:
>> On Wednesday, September 19, 2007, at 07:26AM, "Ian Bicking" <ianb at colorstudy.com
>> > wrote:
>>>> It is in the python.org source tree: Modules/getpath.c
>>> That's the file used in the Framework build of Python? I only see
>>> some small references to __APPLE__, none of which seem related to
>>> Frameworks. Also, if you build Python from source it works fine
>>> -- it's only the python that Apple ships that has the problem.
>>> They must use some patched version of this file that they use...?
>> Start reading at line 694 in Modules/getpath.c, that's in the head
>> of the release25-maint branch.
> It's only 695 lines long...?
Oops, I've only been using vi for a decade or so... Luckily you found
the right bit anyway ;-)
> At line 458 it seems like it is looking for lib/python2.5/os.py, in
> some Framework-specific code. It will look relative to the binary,
> but only after looking in the Framework first. Simply breaking the
> Framework lookup somehow would do it.
> Here's the code to find the Framework locations:
> pythonModule =
> /* Use dylib functions to find out where the framework was loaded
> from */
> buf = (char *)NSLibraryNameForModule(pythonModule);
> I'm not sure how to do anything to that though.
I don't think you can. What you can do create the directory structure
for a framework inside the virtual python environment, including a
copy of the actual shared library, then copy a minimal subset of the
stdlibrary into that (anything you need for your custom site.py) and
have that site.py build the correct sys.path.
You must then copy sys.executable into the virtual python environment
as well and use macholib to rewrite the link command for the python
framework from /Library/Frameworks/Python.framework/... to
@executable_path/../Frameworks/Python.framework/.... This should
ensure that the right shared library is loaded and your environment
works as you want.
You could also ship with the sources to the command-line interpreter
and build that with the right LDFLAGS during installation of the
> Ian Bicking : ianb at colorstudy.com : http://blog.ianbicking.org
> : Write code, do good : http://topp.openplans.org/careers
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