Re: [PATCH] gitk: Use git-difftool for external diffs

David Aguilar [off-list ref] writes:

I started the first step:

http://thread.gmane.org/gmane.comp.version-control.git/135613
http://thread.gmane.org/gmane.comp.version-control.git/135613/focus=135612

Thanks.

The 2nd patch implements the the --gui option which Markus
pointed out would be needed to avoid issues such as calling
"vimdiff" from a console-less gitk:

http://article.gmane.org/gmane.comp.version-control.git/133386

I marked the --gui patch as "RFC" since it introduced a new
config variable and I want to make sure that we agreed on its
name.  I didn't get any feedback about that patch
(my fault-- we were in RC freeze and I forgot to CC: Markus).

I don't think "diff.guitool" would hurt.  However,...

I think the "--gui" patch is a more or less independent issue to "gitk
runs external diff through difftool", because difftool/mergetool already
have a built-in way to auto-guess which backend to use depending on what
its environment looks like (e.g. do we have $DISPLAY etc.).

The "--gui" patch is about giving a more explicit way for the caller to
control that backend picking decision process and it is more like icing
than a prerequisite for the issue.  IOW, I think the end result will be
usable by gitk users even if they do not configure "diff.guitool".