git-bundle: only die if pack would be empty, warn if ref is skipped

diff --git a/tree-diff.c b/tree-diff.c
index 916f489c5b79e04035f96dd9f667f70efedb83fa..c8275823d0eb976e95b256f2bce5497f45d5da77 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -39,8 +39,7 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
                show_entry(opt, "+", t2, base);
                return 1;
        }
-       if (!opt->find_copies_harder &&
-           !memcmp(sha1, sha2, 20) && mode1 == mode2)
+       if (!opt->find_copies_harder && !hashcmp(sha1, sha2) && mode1 == mode2)
                return 0;
 
        /*
@@ -140,13 +139,13 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
        const unsigned char *sha1 = tree_entry_extract(desc, &path, &mode);
 
        if (opt->recursive && S_ISDIR(mode)) {
-               char type[20];
+               enum object_type type;
                char *newbase = malloc_base(base, path, strlen(path));
                struct tree_desc inner;
                void *tree;
 
-               tree = read_sha1_file(sha1, type, &inner.size);
-               if (!tree || strcmp(type, tree_type))
+               tree = read_sha1_file(sha1, &type, &inner.size);
+               if (!tree || type != OBJ_TREE)
                        die("corrupt tree sha %s", sha1_to_hex(sha1));
 
                inner.buf = tree;
@@ -216,6 +215,24 @@ int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const cha
        return retval;
 }
 
+int diff_root_tree_sha1(const unsigned char *new, const char *base, struct diff_options *opt)
+{
+       int retval;
+       void *tree;
+       struct tree_desc empty, real;
+
+       tree = read_object_with_reference(new, tree_type, &real.size, NULL);
+       if (!tree)
+               die("unable to read root tree (%s)", sha1_to_hex(new));
+       real.buf = tree;
+
+       empty.size = 0;
+       empty.buf = "";
+       retval = diff_tree(&empty, &real, base, opt);
+       free(tree);
+       return retval;
+}
+
 static int count_paths(const char **paths)
 {
        int i = 0;