upload-pack: optionally allow fetching reachable sha1

diff --git a/diff.h b/diff.h
index a24a767db78d8e864175cf342f03fc48e159e06e..b4a624d235748bf13be44e7479f086880dcf574f 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -15,6 +15,10 @@ struct diff_filespec;
 struct userdiff_driver;
 struct sha1_array;
 struct commit;
+struct combine_diff_path;
+
+typedef int (*pathchange_fn_t)(struct diff_options *options,
+                struct combine_diff_path *path);
 
 typedef void (*change_fn_t)(struct diff_options *options,
                 unsigned old_mode, unsigned new_mode,
@@ -157,6 +161,7 @@ struct diff_options {
        int close_file;
 
        struct pathspec pathspec;
+       pathchange_fn_t pathchange;
        change_fn_t change;
        add_remove_fn_t add_remove;
        diff_format_fn_t format_callback;
@@ -189,8 +194,10 @@ const char *diff_line_prefix(struct diff_options *);
 
 extern const char mime_boundary_leader[];
 
-extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
-                    const char *base, struct diff_options *opt);
+extern struct combine_diff_path *diff_tree_paths(
+       struct combine_diff_path *p, const unsigned char *sha1,
+       const unsigned char **parent_sha1, int nparent,
+       struct strbuf *base, struct diff_options *opt);
 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
                          const char *base, struct diff_options *opt);
 extern int diff_root_tree_sha1(const unsigned char *new, const char *base,