[PATCH] Provide access to git_dir through get_git_dir().

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

cache.h

@@ -136,6 +136,7 @@ extern unsigned int active_nr, active_alloc, active_cache_changed;
 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 
+extern char *get_git_dir(void);
 extern char *get_object_directory(void);
 extern char *get_refs_directory(void);
 extern char *get_index_file(void);

fsck-objects.c

@@ -406,10 +406,7 @@ static int fsck_head_link(void)
 	char hex[40];
 	unsigned char sha1[20];
 	static char path[PATH_MAX], link[PATH_MAX];
-	const char *git_dir;
-
-	git_dir = getenv(GIT_DIR_ENVIRONMENT);
-	if (!git_dir) git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+	const char *git_dir = get_git_dir();
 
 	snprintf(path, sizeof(path), "%s/HEAD", git_dir);
 	if (readlink(path, link, sizeof(link)) < 0)

path.c

@@ -41,12 +41,10 @@ char *mkpath(const char *fmt, ...)
 
 char *git_path(const char *fmt, ...)
 {
-	const char *git_dir;
+	const char *git_dir = get_git_dir();
 	va_list args;
 	unsigned len;
 
-	git_dir = getenv(GIT_DIR_ENVIRONMENT);
-	if (!git_dir) git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 	len = strlen(git_dir);
 	if (len > PATH_MAX-100)
 		return bad_path;

sha1_file.c

@@ -70,6 +70,13 @@ static void setup_git_env(void)
 		git_graft_file = strdup(git_path("info/grafts"));
 }
 
+char *get_git_dir(void)
+{
+	if (!git_dir)
+		setup_git_env();
+	return git_dir;
+}
+
 char *get_object_directory(void)
 {
 	if (!git_object_dir)