[PATCH v2 1/2] git: make "git -C '' <cmd>" not to barf

[Karthik Nayak <karthik.188@gmail.com>]

It now acts like "cd ''" and does not barf and treats
it as a no-op, this is usefull if a caller function
does not want to change directory and hence gives no
path value, which would have generally caused git to
output an undesired error message.

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 git.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/git.c b/git.c
index 8c7ee9c..ea92a64 100644
--- a/git.c
+++ b/git.c
@@ -204,10 +204,14 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 				fprintf(stderr, "No directory given for -C.\n" );
 				usage(git_usage_string);
 			}
-			if (chdir((*argv)[1]))
-				die_errno("Cannot change to '%s'", (*argv)[1]);
-			if (envchanged)
-				*envchanged = 1;
+			if (*(*argv)[1] == 0)
+				; /* Ignore "" as a directory */
+			else {
+				if (chdir((*argv)[1]))
+					die_errno("Cannot change to '%s'", (*argv)[1]);
+				if (envchanged)
+					*envchanged = 1;
+			}
 			(*argv)++;
 			(*argc)--;
 		} else {
-- 
2.3.1.167.g7f4ba4b.dirty