X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=diff-tree.c;h=0f370927dd2496a420af53d137676b6c3c445f75;hb=aba06682473e2d797011f966d66c93043e3ed57a;hp=826812af83f1f267014860f285fc03286bc5329e;hpb=6cbd72f8d5d794112eab68f7e7222c9a0c5d6587;p=git.git

diff --git a/diff-tree.c b/diff-tree.c
index 826812af8..0f370927d 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -164,14 +164,13 @@ static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, co
 {
 	void *tree1, *tree2;
 	unsigned long size1, size2;
-	char type[20];
 	int retval;
 
-	tree1 = read_sha1_file(old, type, &size1);
-	if (!tree1 || strcmp(type, "tree"))
+	tree1 = read_tree_with_tree_or_commit_sha1(old, &size1, 0);
+	if (!tree1)
 		die("unable to read source tree (%s)", sha1_to_hex(old));
-	tree2 = read_sha1_file(new, type, &size2);
-	if (!tree2 || strcmp(type, "tree"))
+	tree2 = read_tree_with_tree_or_commit_sha1(new, &size2, 0);
+	if (!tree2)
 		die("unable to read destination tree (%s)", sha1_to_hex(new));
 	retval = diff_tree(tree1, size1, tree2, size2, base);
 	free(tree1);
@@ -179,6 +178,8 @@ static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, co
 	return retval;
 }
 
+static char *diff_tree_usage = "diff-tree [-r] [-z] <tree sha1> <tree sha1>";
+
 int main(int argc, char **argv)
 {
 	unsigned char old[20], new[20];
@@ -195,10 +196,10 @@ int main(int argc, char **argv)
 			line_termination = '\0';
 			continue;
 		}
-		usage("diff-tree [-r] [-z] <tree sha1> <tree sha1>");
+		usage(diff_tree_usage);
 	}
 
 	if (argc != 3 || get_sha1_hex(argv[1], old) || get_sha1_hex(argv[2], new))
-		usage("diff-tree <tree sha1> <tree sha1>");
+		usage(diff_tree_usage);
 	return diff_tree_sha1(old, new, "");
 }