Why does setuptools not understand git+https URLs?

Question

According to Dependency section in the setuptools manual git repository URLs can be specified in the dependency_links argument to setup with git+URL. Yet,

cd /tmp
mkdir py-test
cd py-test
touch __init__.py

and creation of a setup.py file with

from setuptools import setup, find_packages
from pkg_resources import parse_version

setup(
    name = "py-test",
    version = "1.0",
    packages = ["."],
    dependency_links = [
        "git+https://github.com/wxWidgets/wxPython.git"
    ],
    install_requires = ["wxPython"],
)

causes the error Download error on git+https://github.com/wxWidgets/wxPython.git: unknown url type: git+https -- Some packages may not be found! when I run python setup.py build && sudo setup.py install.

The installation of the package python-setuptools-git doesn't help.

I'm using setuptools 18.2 with python 2.7 on Ubuntu 15.04.

Answer 1

From the setuptools docs:

In the case of a VCS checkout, you should also append #egg=project-version in order to identify for what package that checkout should be used

So the fix is just to append the #egg=wxPython fragment onto the end:

dependency_links = [
    "git+https://github.com/wxWidgets/wxPython.git#egg=wxPython"
]