get_tree_entry: map blank requested entry to tree root

diff --git a/describe.c b/describe.c
index 2b9301fc1205795e30dfd7a7493cb03cdebdb437..f4029ee74e80305e9ec9e5793d2e12c07096f45a 100644 (file)
--- a/describe.c
+++ b/describe.c
@@ -42,7 +42,7 @@ static void add_to_known_names(const char *path,
        struct commit_name *name = xmalloc(sizeof(struct commit_name) + len);
 
        name->commit = commit;
-       name->prio = prio; 
+       name->prio = prio;
        memcpy(name->path, path, len);
        idx = names;
        if (idx >= allocs) {
@@ -53,7 +53,7 @@ static void add_to_known_names(const char *path,
        names = ++idx;
 }
 
-static int get_name(const char *path, const unsigned char *sha1)
+static int get_name(const char *path, const unsigned char *sha1, int flag, void *cb_data)
 {
        struct commit *commit = lookup_commit_reference_gently(sha1, 1);
        struct object *object;
@@ -113,7 +113,7 @@ static void describe(const char *arg, int last_one)
 
        if (!initialized) {
                initialized = 1;
-               for_each_ref(get_name);
+               for_each_ref(get_name, NULL);
                qsort(name_array, names, sizeof(*name_array), compare_names);
        }
 
@@ -154,14 +154,16 @@ int main(int argc, char **argv)
                        tags = 1;
                else if (!strncmp(arg, "--abbrev=", 9)) {
                        abbrev = strtoul(arg + 9, NULL, 10);
-                       if (abbrev < MINIMUM_ABBREV || 40 <= abbrev)
+                       if (abbrev < MINIMUM_ABBREV || 40 < abbrev)
                                abbrev = DEFAULT_ABBREV;
                }
                else
                        usage(describe_usage);
        }
 
-       if (i == argc)
+       setup_git_directory();
+
+       if (argc <= i)
                describe("HEAD", 1);
        else
                while (i < argc) {