[BUG] 'add -u' doesn't work from untracked subdir

["SZEDER Gábor" <szeder@ira.uka.de>]

Hi,


As the subject says, 'git add -u' does not work from an untracked
subdir, because it doesn't add modified files to the index.  The
following script reproduces the issue:

mkdir repo
cd repo
git init
echo 1 >foo
git add foo
git commit -m first
echo 2 >foo
mkdir untracked_subdir
cd untracked_subdir
git add -u
git diff

It worked in the initial 'git add -u' implementation (dfdac5d, git-add
-u: match the index with working tree, 2007-04-20), but 2ed2c222
(git-add -u paths... now works from subdirectory, 2007-08-16) broke it
later, and is broken ever since.


Regards,
Gábor