mv: move index search code out

"Huh?" is removed from die() message.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/mv.c

@@ -78,6 +78,29 @@ static void prepare_move_submodule(const char *src, int first,
 	strbuf_release(&submodule_dotgit);
 }
 
+static int index_range_of_same_dir(const char *src, int length,
+				   int *first_p, int *last_p)
+{
+	const char *src_w_slash = add_slash(src);
+	int first, last, len_w_slash = length + 1;
+
+	first = cache_name_pos(src_w_slash, len_w_slash);
+	if (first >= 0)
+		die(_("%.*s is in index"), len_w_slash, src_w_slash);
+
+	first = -1 - first;
+	for (last = first; last < active_nr; last++) {
+		const char *path = active_cache[last]->name;
+		if (strncmp(path, src_w_slash, len_w_slash))
+			break;
+	}
+	if (src_w_slash != src)
+		free((char *)src_w_slash);
+	*first_p = first;
+	*last_p = last;
+	return last - first;
+}
+
 int cmd_mv(int argc, const char **argv, const char *prefix)
 {
 	int i, gitmodules_modified = 0;
@@ -154,25 +177,10 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 				prepare_move_submodule(src, first,
 						       submodule_gitfile + i);
 			else {
-				const char *src_w_slash = add_slash(src);
-				int last, len_w_slash = length + 1;
+				int last;
 
 				modes[i] = WORKING_DIRECTORY;
-
-				first = cache_name_pos(src_w_slash, len_w_slash);
-				if (first >= 0)
-					die (_("Huh? %.*s is in index?"),
-							len_w_slash, src_w_slash);
-
-				first = -1 - first;
-				for (last = first; last < active_nr; last++) {
-					const char *path = active_cache[last]->name;
-					if (strncmp(path, src_w_slash, len_w_slash))
-						break;
-				}
-				if (src_w_slash != src)
-					free((char *)src_w_slash);
-
+				index_range_of_same_dir(src, length, &first, &last);
 				if (last - first < 1)
 					bad = _("source directory is empty");
 				else {