[Pythonmac-SIG] SciPy install on Tiger with Python 2.4.1 framework

[Chris Barker]

Bob Ippolito wrote:
> On Aug 11, 2005, at 6:15 AM, Samuel M. Smith wrote:
>>if sys.platform=='darwin':
>>     if os.path.realpath(sys.executable).startswith('/System'):
>>         # This is when Python is from Apple framework
>>         opt.extend(["-Wl,-framework","-Wl,Python"])
>>     #else we are running in Fink python.
>>     opt.extend(["-lcc_dynamic","-bundle"])
>>else:
>>     opt.append("-shared")
>>
>>Which looked like to me that someone had already accounted for the
>>framework build so I didn't make any changes
>>to setup.py
> 
> Well, they tried to, but they did it wrong.  It should be using a  
> more robust way for detecting a framework Python.  Something like  
> 'Python.framework' in os.path.realpath(sys.executable)

Bob's exactly right (as usual) and I just feel the need to rant a little:

This is really lame coding, and it's a pattern I see a lot:

if ONE_WAY_TO_CHECK_FOR_ONE_THING:
	do this
else:
	we MUST be doing what I have on my system!

lame, and bug prone.

At the very least, they could have done something like:

if sys.platform=='darwin':
      if os.path.realpath(sys.executable).startswith('/System'):
          # This is when Python is from Apple framework
          opt.extend(["-Wl,-framework","-Wl,Python"])
     elif (Do something to actually check for fink):
          opt.extend(["-lcc_dynamic","-bundle"])
     else:
	raise Exception("You seem to have a python I haven't been configured for")
else:
      opt.append("-shared")

Would that be so hard? If they had done that, at least you would have 
gotten a clear message about what was wrong.

Checking for fink could be a simple as:
     os.path.realpath(sys.executable).startswith('/sw'):

That's not all that robust either, but it's a start.

<\rant>

-Chris


-- 
Christopher Barker, Ph.D.
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