introduce GIT_WORK_TREE to specify the work tree

diff --git a/git.c b/git.c
index 29b55a16047837084fd9e2e8238137b8a2fe44ea..05a391b4d66fa9daa0ba1c4409eed1e8ee27be30 100644 (file)
--- a/git.c
+++ b/git.c
@@ -4,7 +4,7 @@
 #include "quote.h"
 
 const char git_usage_string[] =
-       "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]";
+       "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
 
 static void prepend_to_path(const char *dir, int len)
 {
@@ -69,6 +69,16 @@ static int handle_options(const char*** argv, int* argc)
                        handled++;
                } else if (!prefixcmp(cmd, "--git-dir=")) {
                        setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
+               } else if (!strcmp(cmd, "--work-tree")) {
+                       if (*argc < 2) {
+                               fprintf(stderr, "No directory given for --work-tree.\n" );
+                               usage(git_usage_string);
+                       }
+                       setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
+                       (*argv)++;
+                       (*argc)--;
+               } else if (!prefixcmp(cmd, "--work-tree=")) {
+                       setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
                } else if (!strcmp(cmd, "--bare")) {
                        static char git_dir[PATH_MAX+1];
                        setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 1);