External tool is ignored when using difftool with --no-index

[Sylvain Lacaze <sylvain@xxxxxxxxx>]

Hi,

I have “p4merge” setup as diff.tool and merge.tool, and it work great
in normal operation (i.e., “p4merge” opens), e.g:

$: git difftool HEAD~3 somePath/someFile.m

However, when I use “—no-index” to compare 2 arbitrary file, difftool
just uses diff:

$: git difftool --no-index somePath/someFile.m somePath/someOtherFile.m
$: git difftool --no-index --tool=p4merge somePath/someFile.m
somePath/someOtherFile.m

Both the above command just yield normal diff.

I’m using the latest GIT build:

$: git version
git version 2.20.1.windows.1


Best,

Sylvain