X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=tag.c;h=e574c4b7a496d3a1d113801214197a04d5c74d42;hb=d4072c9722d1ef28abe8ef0eb0b244017fff3f42;hp=2b25fc0e1dc53234e38e8ed8fdc1cb99fa4fd84a;hpb=5569bf9bbedd63a00780fc5c110e0cfab3aa97b9;p=git.git

diff --git a/tag.c b/tag.c
index 2b25fc0e..e574c4b7 100644
--- a/tag.c
+++ b/tag.c
@@ -3,6 +3,18 @@
 
 const char *tag_type = "tag";
 
+struct object *deref_tag(struct object *o, const char *warn, int warnlen)
+{
+	while (o && o->type == tag_type)
+		o = parse_object(((struct tag *)o)->tagged->sha1);
+	if (!o && warn) {
+		if (!warnlen)
+			warnlen = strlen(warn);
+		error("missing object referenced by '%.*s'", warnlen, warn);
+	}
+	return o;
+}
+
 struct tag *lookup_tag(const unsigned char *sha1)
 {
         struct object *obj = lookup_object(sha1);