check-ref-format: simplify --print implementation

normalize_path_copy() is a complicated function, but most of its
functionality will never apply to a ref name that has been checked
with check_ref_format().

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-check-ref-format.c b/builtin-check-ref-format.c
index b97b61a0a4d957d6e2cb59eb314e49c06c8d70d8..e3e7bdf52f0b1f597e6cfd3affcf75f41f183d75 100644 (file)
--- a/builtin-check-ref-format.c
+++ b/builtin-check-ref-format.c
@@ -7,6 +7,28 @@
 #include "builtin.h"
 #include "strbuf.h"
 
+/*
+ * Replace each run of adjacent slashes in src with a single slash,
+ * and write the result to dst.
+ *
+ * This function is similar to normalize_path_copy(), but stripped down
+ * to meet check_ref_format's simpler needs.
+ */
+static void collapse_slashes(char *dst, const char *src)
+{
+       char ch;
+       char prev = '\0';
+
+       while ((ch = *src++) != '\0') {
+               if (prev == '/' && ch == prev)
+                       continue;
+
+               *dst++ = ch;
+               prev = ch;
+       }
+       *dst = '\0';
+}
+
 int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
 {
        if (argc == 3 && !strcmp(argv[1], "--branch")) {
@@ -22,8 +44,7 @@ int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
 
                if (check_ref_format(argv[2]))
                        exit(1);
-               if (normalize_path_copy(refname, argv[2]))
-                       die("Could not normalize ref name '%s'", argv[2]);
+               collapse_slashes(refname, argv[2]);
                printf("%s\n", refname);
                exit(0);
        }