pip install with --index-url=<local drive> ignores path containing dots

[jrast]

• Pip version: 8.1.2 and 9.0.1
• Python version: CPython 2.7.12 32bit
• Operating System: Windows 7 64bit

Description:

I tried to install the backports.functools-lru-cache package which is simple index located on my drive (created with pip2pi). The actual package is in the folder D:\temp\pip2pi\simple\backports.functools-lru-cache and named backports.functools-lru-cache-1.3-py2.py3-none-any.whl. However, it seems pip replaces the dot in the path with a dash - and therefore is not able to find the package.

What I've run:

pip install --index-url="file:///d:/temp/pip2pi/simple" backports.functool-lru-cache

Collecting backports.functools-lru-cache
  Url 'file:///d:/temp/pip2pi/simple/backports-functools-lru-cache/' is ignored: it is neither a file nor a directory.
  Could not find a version that satisfies the requirement backports.functools-lru-cache (from versions: )
No matching distribution found for backports.functools-lru-cache

[dstufft]

This is expected behavior and it stems from pip2pi not correctly implementing PEP 503.