Previously, this test utility happily returned with exit code 0 if garbage
was thrown at it. Now it reports failure if an unknown function name was
given on the command line.
Signed-off-by: NJohannes Sixt <j6t@kdbg.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

When normalizing an absolute path, we might have to add a slash _and_ a
NUL to the buffer, so the buffer was one too small.

Let's just future proof the code and alloc PATH_MAX + 1 bytes.
Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Make git recognize a new environment variable that prevents it from
chdir'ing up into specified directories when looking for a GIT_DIR.
Useful for avoiding slow network directories.

For example, I use git in an environment where homedirs are automounted
and "ls /home/nonexistent" takes about 9 seconds.  Setting
GIT_CEILING_DIRS="/home" allows "git help -a" (for bash completion) and
"git symbolic-ref" (for my shell prompt) to run in a reasonable time.
Signed-off-by: NDavid Reiss <dreiss@facebook.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NDavid Reiss <dreiss@facebook.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

normalize_absolute_path removes several oddities form absolute paths,
giving nice clean paths like "/dir/sub1/sub2".  Also add a test case
for this utility, based on a new test program (in the style of test-sha1).
Signed-off-by: NDavid Reiss <dreiss@facebook.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>