How do I subclass the build command?

Question

The subject is self-descriptive: I need to subclass the setup.py build command in order to perform additional build steps. However I\'ve failed to find any

Answer 1

Setuptools does not override the distutils build command itself; only the build_py and build_ext subcommands.

So, to create your own subclass you need to import from the distutils.command.build module, which contains a build class (subclass of Command):

import distutils.command.build

class BuildCommandProxy(distutils.command.build.build):
    pass

Answer 2

For completeness, here is a full example of how to add custom build operations:

import distutils.command.build

# Override build command
class BuildCommand(distutils.command.build.build):

    def run(self):
        # Run the original build command
        distutils.command.build.build.run(self)
        # Custom build stuff goes here

# Replace the build command with ours
setup(...,
      cmdclass={"build": BuildCommand})