Re: Problem with vimdiff and file name resolution

On 2014-07-10, Christian Brabandt wrote:
> Hi Gary!
>
> On Mi, 09 Jul 2014, Gary Johnson wrote:
> > On one of the Linux machines on which I run Vim we run a backup
> > program which creates hourly and nightly backups of each user's home
> > directory in ~/.snapshot. The problem is that when I try to view
> > the differences between a file and its backup copy using vimdiff,
> > vimdiff resolves both file names to the same file.
> >
> > For example, the following command,
> >
> > $ vimdiff -N -u NONE -i NONE .snapshot/nightly.0/.configfiles/profile.common .configfiles/profile.common
> >
> > creates two vertically-split windows, but both windows contain the
> > same file, .snapshot/nightly.0/.configfiles/profile.common.
> >
> > I can view the differences by using just diff instead,
> >
> > $ diff .snapshot/nightly.0/.configfiles/profile.common .configfiles/profile.common
> >
> > and ls also shows them to be different files:
> >
> > $ ls -l .snapshot/nightly.0/.configfiles/profile.common .configfiles/profile.common
> > -rwx------ 1 gary gary 3523 Jul 9 13:09 .configfiles/profile.common
> > -rwx------ 1 gary gary 2992 Jul 7 10:07 .snapshot/nightly.0/.configfiles/profile.common
> >
> > This seems like a bug.
> >
> > I'm running 7.4.283 on Fedora 17 Linux.
>
> Is there an easy way to reproduce the issue? It somehow sounds, like
> Vim is thinking the second argument as a directory and uses the same
> file again. What happens, if you swap the arguments?

Swapping the arguments causes vimdiff to open
.configfiles/profile.common in both windows. In both cases, vimdiff
opens the first file in both windows.

I'll work on a way to reproduce it.

Thanks,
Gary

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