static int initialized = 0;
struct commit_name *n;
- if (get_sha1(arg, sha1) < 0)
- usage(describe_usage);
+ if (get_sha1(arg, sha1))
+ die("Not a valid object name %s", arg);
cmit = lookup_commit_reference(sha1);
if (!cmit)
- usage(describe_usage);
+ die("%s is not a valid '%s' object", arg, commit_type);
if (!initialized) {
initialized = 1;