Re: Cygwin Git with Windows paths

["Torsten Bögershausen" <tboegi@web.de>]

On 2018-11-19 04:33, Junio C Hamano wrote:
> "Randall S. Becker" <rsbecker@nexbridge.com> writes:
> 
>>> Torsten Bögershausen <tboegi@web.de> writes:
>>>
>>>> And it may even be that we need a special handling for the "\" to be
>>>> treated as "/".
>>>
>>> I do not do Windows, but is_dir_sep() needs to be tweaked if you want to do
>>> that.
>>
>> Heavy Cygwin user here. It is used in my environment for
>> cross-compilation. Everything should be done using / separators in
>> Cygwin, not \. So /cygdrive/c, /cygdrive/d always prefaces the
>> path rather than C:\ or D:\, which won't parse. It is,
>> essentially, a bash environment, including that git completions
>> work properly. Backslash ends up doing what it would in bash.
> 
> In short, in your opinion, the original message in this thread
> expresses an invalid wish, as C:\path\to\dir\ is not a valid way to
> spell the path to the directory, and it should be written as
> /cygdrive/c/path/to/dir instead?
> 
> How well does this argument work in the real world, when another
> claim in the original message
> 
>     This causes problems for any non-Cygwin tools that might call Git:
> 
>     http://github.com/golang/go/issues/23155
> 
> is taken into account, I wonder, though?
> 


Back to the original email, where the path embedded in ''
and the bash does not interpret the "\", I think.

>   $ git clone git://github.com/benhoyt/goawk 'C:\cygwin64\tmp\goawk'
>   Cloning into 'C:\cygwin64\tmp\goawk'...
>   fatal: Invalid path '/home/Steven/C:\cygwin64\tmp\goawk': No such file or
>   directory

>It seems the problem is that Git thinks the Windows form path is relative
>because it does not start with "/".

>A Git Bisect reveals this:
>05b458c104708141d2fad211d79703b3b99cc5a8 is the first bad commit
>commit 05b458c104708141d2fad211d79703b3b99cc5a8
>Author: Brandon Williams <bmwill@google.com>
>Date:   Mon Dec 12 10:16:52 2016 -0800


The first question is, does this work under Git for Windows ?

Looking into 05b458c104708141d2fad, it seems as if the following functions
need to be "overridden" for cygwin, similar as we do it for mingw:
 is_dir_sep()
 offset_1st_component()
 find_last_dir_sep()


If nothing works,
it may help to add some fprintf(stderr,...) in the functions used
by 05b458c104708141d2f:

strip_last_component(),
get_next_component()
real_path_internal()