Pip-compile ignores environment-marked requirements in setup.py

[ghost]

Pip-compile ignores environment-marked requirements in setup.py's install_requires section, even when the condition succeeds. However, this does not happen when using a requirements.in file with the same requirements.

Environment Versions

1. macOS Mojave
2. Python version: 3.6.0
3. pip version: 19.3
4. pip-tools version: 4.2.0

Steps to replicate

1. Create a requirements.in file with requests>1.0;python_version=='3.6'. Run pip-compile with Python 3.6 .
2. In a separate folder, create a setup.py file with

from setuptools import setup
setup(
    name="my-package",
    install_requires=["requests>=1.0;python_version=='3.6'"],
)

Run pip-compile with Python 3.6 .

Expected result

#
# This file is autogenerated by pip-compile
# To update, run:
#
#    pip-compile
#
certifi==2019.9.11        # via requests
chardet==3.0.4            # via requests
idna==2.8                 # via requests
requests==2.22.0 ; python_version == "3.6"
urllib3==1.25.6           # via requests

for both.

Actual result

The above for the requirements.in file, just the top comments (no actual requirements) for the setup.py file.

[atugushev]

Hello @jbai14,

Thanks for the detailed issue! It duplicates #625.

[ghost]

Ah, thanks! I'll close this then.