[PATCH] added -C option to chdir() into another directory first

[kevin brintnall <kbrint@rufus.net>]

This allows things like 'git -C /somewhere pull' without specifying both
--work-tree and --git-dir.

Signed-off-by: kevin brintnall <kbrint@rufus.net>
---
 git.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/git.c b/git.c
index c2b181e..b218bfe 100644
--- a/git.c
+++ b/git.c
@@ -5,7 +5,7 @@
 #include "run-command.h"
 
 const char git_usage_string[] =
-	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
+	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [-C BASE_DIR] [--help] COMMAND [ARGS]";
 
 const char git_more_info_string[] =
 	"See 'git help COMMAND' for more information on a specific command.";
@@ -116,6 +116,16 @@ static int handle_options(const char*** argv, int* argc, int* envchanged)
 			setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
 			if (envchanged)
 				*envchanged = 1;
+		} else if (!strcmp(cmd, "-C")) {
+			char *dir = (*argv)[1];
+			if (*argc < 2) {
+				fprintf(stderr, "No directory given for -C");
+				usage(git_usage_string);
+			}
+			if (chdir(dir))
+				die("Cannot change to %s: %s", dir, strerror(errno));
+			(*argv)++;
+			(*argc)--;
 		} else {
 			fprintf(stderr, "Unknown option: %s\n", cmd);
 			usage(git_usage_string);
-- 
1.6.1.3