Re: CYGWIN git cannot install python packages with pip

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

Hi,

On Thu, 4 May 2017, ankostis wrote:

> On 4 May 2017 at 11:47, Adam Dinwoodie <adam@dinwoodie.org> wrote:
> > Confirmed: the Cygwin project as a general rule doesn't support this
> > sort of mixing of Windows and Cygwin tools.  Either use Python and Git
> > packages both provided by Cygwin, or both provided by Windows.
> >
> > Mixing and matching does work sometimes -- as was apparently the case
> > with Cygwin Git v2.8.3-1 -- but it requires care and you're generally on
> > your own with it.
> 
> MSYS2's git-2.12.1 also works fine, so there must be something
> different in this build of git that breaks this long-standing capability.

MSYS2's runtime has auto-conversion functionality, trying to guess what
arguments passed to a non-MSYS2 program may be Unix paths, converting them
to Windows ones.

So what you may see here has nothing to do with MSYS2's Git *not* having
the change that breaks Cygwin Git for you, but MSYS2's runtime saving you
from trouble.

> Judging from the error-message, it somehow concatenates input & output
> paths.
> Isn't this something to research about?

It is something to research about. But by you, not by me. I need to focus
on bigger-impact issues, because I do not scale, and Git for Windows'
users generally do not experience the problem you described.

Ciao,
Johannes