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-rw-r--r--builtin-diff-tree.c33
1 files changed, 29 insertions, 4 deletions
diff --git a/builtin-diff-tree.c b/builtin-diff-tree.c
index ebbd6317c..1138c2da7 100644
--- a/builtin-diff-tree.c
+++ b/builtin-diff-tree.c
@@ -42,21 +42,46 @@ static int stdin_diff_commit(struct commit *commit, char *line, int len)
return log_tree_commit(&log_tree_opt, commit);
}
+/* Diff two trees. */
+static int stdin_diff_trees(struct tree *tree1, char *line, int len)
+{
+ unsigned char sha1[20];
+ struct tree *tree2;
+ if (len != 82 || !isspace(line[40]) || get_sha1_hex(line + 41, sha1))
+ return error("Need exactly two trees, separated by a space");
+ tree2 = lookup_tree(sha1);
+ if (!tree2 || parse_tree(tree2))
+ return -1;
+ printf("%s %s\n", sha1_to_hex(tree1->object.sha1),
+ sha1_to_hex(tree2->object.sha1));
+ diff_tree_sha1(tree1->object.sha1, tree2->object.sha1,
+ "", &log_tree_opt.diffopt);
+ log_tree_diff_flush(&log_tree_opt);
+ return 0;
+}
+
static int diff_tree_stdin(char *line)
{
int len = strlen(line);
unsigned char sha1[20];
- struct commit *commit;
+ struct object *obj;
if (!len || line[len-1] != '\n')
return -1;
line[len-1] = 0;
if (get_sha1_hex(line, sha1))
return -1;
- commit = lookup_commit(sha1);
- if (!commit || parse_commit(commit))
+ obj = lookup_object(sha1);
+ obj = obj ? obj : parse_object(sha1);
+ if (!obj)
return -1;
- return stdin_diff_commit(commit, line, len);
+ if (obj->type == OBJ_COMMIT)
+ return stdin_diff_commit((struct commit *)obj, line, len);
+ if (obj->type == OBJ_TREE)
+ return stdin_diff_trees((struct tree *)obj, line, len);
+ error("Object %s is a %s, not a commit or tree",
+ sha1_to_hex(sha1), typename(obj->type));
+ return -1;
}
static const char diff_tree_usage[] =