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

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

[Karthik Nayak]

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

[PATCH v2 2/2] git-C: Add test to check "git -C ''"

[Karthik Nayak]

Add a test to check whether "git -C ''" works
without giving an error. This is achieved by
adding a commit and checking the log using
"git -C ''" and comparing the log message with
the commit message.

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
---
 t/t0056-git-C.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/t/t0056-git-C.sh b/t/t0056-git-C.sh
index 99c0377..1cefd4a 100755
--- a/t/t0056-git-C.sh
+++ b/t/t0056-git-C.sh
@@ -1,3 +1,4 @@
+
 #!/bin/sh
 
 test_description='"-C <path>" option and its effects on other path-related options'
@@ -81,4 +82,13 @@ test_expect_success 'Relative followed by fullpath: "-C ./here -C /there" is equ
 	test_cmp expected actual
 '
 
+test_expect_success 'Should not barf when "git -C "" cmd" is used' '
+	echo 1 > a.txt &&
+	msg="initial a.txt" &&
+	(git add a.txt && git commit -m "$msg") &&
+	echo "$msg" >expected &&
+	git -C "" log --format=%s >actual &&
+	test_cmp expected actual
+'
+
 test_done
-- 
2.3.1.167.g7f4ba4b.dirty