1 files changed, 23 insertions, 0 deletions
diff --git a/builtin-check-ref-format.c b/builtin-check-ref-format.c
new file mode 100644
index 0000000000..f9381e07ea
--- /dev/null
+++ b/builtin-check-ref-format.c
@@ -0,0 +1,23 @@
+/*
+ * GIT - The information manager from hell
+ */
+
+#include "cache.h"
+#include "refs.h"
+#include "builtin.h"
+#include "strbuf.h"
+
+int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
+{
+	if (argc == 3 && !strcmp(argv[1], "--branch")) {
+		struct strbuf sb = STRBUF_INIT;
+
+		if (strbuf_check_branch_ref(&sb, argv[2]))
+			die("'%s' is not a valid branch name", argv[2]);
+		printf("%s\n", sb.buf + 11);
+		exit(0);
+	}
+	if (argc != 2)
+		usage("git check-ref-format refname");
+	return !!check_ref_format(argv[1]);
+}