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Date:	Fri, 4 Dec 2015 17:04:42 +0000
From:	Adam Dinwoodie <adam AT dinwoodie DOT org>
To:	cygwin AT cygwin DOT com
Subject:	Re: Git issue.
Message-ID:	<20151204170442.GL14466@dinwoodie.org>
References:	<1032375163 DOT 9174650 DOT 1448234447549 DOT JavaMail DOT zimbra AT comcast DOT net> <1271139068 DOT 9180259 DOT 1448235027708 DOT JavaMail DOT zimbra AT comcast DOT net> <20151203204221 DOT GK14466 AT dinwoodie DOT org> <45790306 DOT 1954012 DOT 1449187639543 DOT JavaMail DOT zimbra AT comcast DOT net>
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On Fri, Dec 04, 2015 at 12:07:19AM +0000, Matt Smith wrote:
> > On Sun, Nov 22, 2015 at 11:30:27PM +0000, boulderfans wrote: 
> > > [/cygdrive/d/projects] 
> > > $ git --git-dir=d:/projects/git-git/.git config alias.foo ls-files 
> > > error: Unable to open tempfile: /cygdrive/d/projects/d:/projects/git-git/.git/config.lock 
> > > error: could not lock config file d:/projects/git-git/.git/config: No such file or directory 
> > > 
> > > The problem is that the code that is checking the --git-dir option 
> > > doesn't work properly if you use a DOS drive:/path specification. 
> > 
> > Cygwin applications, including applications you've compiled yourself 
> > using the Cygwin toolchain, normally expect Cygwin's Linux-like paths, 
> > e.g. /cygdrive/d/projects/git-git. Attempting to use Windows paths 
> > simply isn't meant to work. 
> > 
> > You can convert from a Windows path to the equivalent Cygwin path using 
> > the cygpath utility, e.g.: 
> > 
> > git --git-dir="$(cygpath 'd:/projects/git-git/.git')" config alias.foo ls-files 
>
> Ok.  I wasn't sure as the behavior changed.  It worked in 1.9.5 and
> then stopped working when I moved to 2.5.x.  I'm not sure if it
> matters to you, but doing some bisecting it looks like the behavior
> changed between 2.2.0 and 2.3.0:

Please don't top post on this list, and please don't quote raw email
addresses.  See https://cygwin.com/acronyms/#TOFU for a brief note on
the whys.

Out of curiosity, I wrote a short bisect script to test this behaviour;
the behaviour changed in v2.2.0-rc0-1-gfa137f6, which changed handling
of lock files; it looks like it broke your scenario as a side-effect.

However, as I say, this isn't something that was ever supposed to work;
that it did in the past was coincidence rather than design, so I don't
think you'll have any luck getting the old behaviour back.  Using
cygpath to convert between Windows and Cygwin paths, and otherwise
sticking to Linux/Cygwin-style paths for Cygwin applications and
Windows paths for Windows ones, is the correct way to go about this.

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