API to parse requirements.txt for setup.py

requirements.txt could a convenient single declarative point for specifying dependencies if it could be pasted into setup.py install_requires as-is. But requirements.txt contains comments and references to other requirements files, which seem to be incompatible with install_requires (reference needed).

It would be nice to have official API that parses requirements.txt file into a list suitable for install_requires section.

https://stackoverflow.com/questions/14399534/reference-requirements-txt-for-the-install-requires-kwarg-in-setuptools-setup-py

[mattvonrocketstein]

requirements.txt supports this, setup.py does not: git+https://github.com/user/repo.git@master#egg=loggable.

setup.py gives an error like this: error in setup command: 'install_requires' must be a string or list of strings containing valid project/version requirement specifiers; Invalid requirement, parse error at "'+https:/'"

stuff like this this is still a valid question and a confusing issue years and years later.

this api should exist and maybe parse requirements.txt to return a dictionary of {"dependency_links": [...], "install_requires": [....]} which is suitable to use like this: setup(<other_setup_keywords>, **parse_requirements('requirements.txt'))

[benoit-pierre]

There’s also no support for environment markers in install_requires requirements (e.g. python-xlib==0.19; "linux" in sys_platform will not work), something that is handled by extras_require.

Note that install_requires can just be a multi-lines string, so if you stick to a subset of pip’s requirements format that is supported by setuptools, you should be able to use something as simple as:

with open('requirements.txt') as fp:
    install_requires = fp.read()

setup(install_requires=install_requires, ...)

in your setup.py.

Also looks like a duplicate of #1074.