Python package setup: setup.py with customisation to handle wrapped fortran

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Python package setup: setup.py with customisation to handle wrapped fortran



I have a python package i would like to distribute. I have the package set-up and am able to download the tarball, unzip and install it using:


python setup.py install



which works fine.



I would also like to upload the package to PyPi, and enable it to be installed using pip.



However, the package contains f2py wrapped fortran, and which needs to be compiled on build with the resulting .so files moved to the eventual installation folder. I am confused as to how to do this using:


python3 setup.py sdist



followed by:


pip3 install pkg_name_here.tar.gz



The reason being that when I run


python3 setup.py sdist



the custom commands are being run, part of which is trying to move the compiled *so files to the installation folder, which has not yet been created. An example of the code outline i have used is in this example here:


from setuptools.command.install import install
from setuptools.command.develop import develop
from setuptools.command.egg_info import egg_info

'''
BEGIN CUSTOM INSTALL COMMANDS
These classes are used to hook into setup.py's install process. Depending on the context:
$ pip install my-package

Can yield `setup.py install`, `setup.py egg_info`, or `setup.py develop`
'''


def custom_command():
import sys
if sys.platform in ['darwin', 'linux']:
os.system('./custom_command.sh')


class CustomInstallCommand(install):
def run(self):
install.run(self)
custom_command()


class CustomDevelopCommand(develop):
def run(self):
develop.run(self)
custom_command()


class CustomEggInfoCommand(egg_info):
def run(self):
egg_info.run(self)
custom_command()

'''
END CUSTOM INSTALL COMMANDS
'''

setup(
...
cmdclass={
'install': CustomInstallCommand,
'develop': CustomDevelopCommand,
'egg_info': CustomEggInfoCommand,
},
...
)



In my instance the custom_command() compiles and wraps the fortran and copies the lib files to the installation folder.



What I would like to know is if there is a way of only running these custom commands during the installation with pip? i.e avoid custom_command() being run during packaging, and only run during installation.









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