setup_requires makes pip failing

[vbauchart]

setup_requires makes pip failing when using own devpi repository because it does honor PIP_INDEX_URL

Btw using setup_requires is now deprecated in setuptools itself
pypa/setuptools#1320 (comment)

[vbauchart]

here is my full error.
As you can see, he tries to connect on internet instead of using my own repository

# pip --version
pip 19.3.1 from /opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/pip (python 3.8)

# pip install sagecipher
WARNING: Running pip install with root privileges is generally not a good idea. Try `pip install --user` instead.
Looking in indexes: https://****/artifactory/api/pypi/remote-global-pypi-release/simple/
Collecting sagecipher
  Downloading https://https://****/artifactory/api/pypi/remote-global-pypi-release/simple/
/artifactory/api/pypi/remote-global-pypi-release/packages/packages/79/bb/5cf41087b5eb5b8482023b5d0b885c54311900c96e434d78749c69941deb/sagecipher-0.7.5.tar.gz
    ERROR: Command errored out with exit status 1:
     command: /opt/rh/rh-python38/root/usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-x8yqbguq/sagecipher/setup.py'"'"'; __file__='"'"'/tmp/pip-install-x8yqbguq/sagecipher/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-x8yqbguq/sagecipher/pip-egg-info
         cwd: /tmp/pip-install-x8yqbguq/sagecipher/
    Complete output (25 lines):
    Download error on https://pypi.org/simple/pytest-runner/: [Errno -2] Name or service not known -- Some packages may not be found!
    Couldn't find index page for 'pytest-runner' (maybe misspelled?)
    Download error on https://pypi.org/simple/: [Errno -2] Name or service not known -- Some packages may not be found!
    No local packages or working download links found for pytest-runner
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-x8yqbguq/sagecipher/setup.py", line 10, in <module>
        setup(
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/setuptools/__init__.py", line 144, in setup
        _install_setup_requires(attrs)
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/setuptools/__init__.py", line 139, in _install_setup_requires
        dist.fetch_build_eggs(dist.setup_requires)
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/setuptools/dist.py", line 717, in fetch_build_eggs
        resolved_dists = pkg_resources.working_set.resolve(
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 780, in resolve
        dist = best[req.key] = env.best_match(
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 1065, in best_match
        return self.obtain(req, installer)
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 1077, in obtain
        return installer(requirement)
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/setuptools/dist.py", line 787, in fetch_build_egg
        return cmd.easy_install(req)
      File "/opt/rh/rh-python38/root/usr/lib/python3.8/site-packages/setuptools/command/easy_install.py", line 678, in easy_install
        raise DistutilsError(msg)
    distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('pytest-runner')
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.