[Distutils] distutils post processing
Eric S. Johansson
esj at harvee.org
Tue Nov 7 21:43:30 CET 2006
Phillip J. Eby wrote:
> At 10:42 AM 11/7/2006 -0500, Eric S. Johansson wrote:
>> I'm trying to extend distutiles to do things like fix permissions etc.
>> have a draft that works but I'm not sure how to invoke it. I'm
>> running it after setup() but as you would expect it always run on any
>> setup operation. How can I limit when my code run only when it's a
>> build command?
>> I tried following the distutiles extension instructions but it is a bit
>> thin. some pointers would be appreciated. Thanks for your time.
> Subclass the appropriate command class, e.g.
> distuils.command.build_ext.build_ext or whatever, extending the run()
> method to do what you want. Add it to the 'cmdclass' dictionary in your
> setup() call.
thank you. Your advice helped by can't quite say why. Somehow it
closed a missing gap. I would suggest something more like this inside
the documentation for integrating new commands
distutils lets the developer modify different phases of the build,
installation, and distribution processes. By overriding one of the
distutils/command modules, one can modify the build process for your
It's often hard to know where to start with regards to modifying setup
processes. Frequently it is simpler than it first appears. For
example, modifying the mainline build process for pre processing and
post processing of data requires a subclass to build and overload the
run method. this new run method would do the pre-and or postprocessing
necessary. At the right time it would also call the original run
method. See the example below.
"""Specialized Python source builder."""
# pre processing
# normal processing
# post processing
setup would be told about this new class using its cmdclass argument.
This argument is a dictionary of class name to look for (i.e. one of
the five above) and the class associated with that name.
anyway, that's some of the kind of information that would have been
useful when I was reading the documentation.
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