diff --follow: do not waste cycles while recursing

diff --git a/tree-diff.c b/tree-diff.c
index 7d745b44061955ced9ce4624a498647a1d8d32a5..5b68c0864cac22d083228d5966487913df5c6be2 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -68,7 +68,7 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
                if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE)) {
                        newbase[baselen + pathlen1] = 0;
                        opt->change(opt, mode1, mode2,
-                                   sha1, sha2, newbase);
+                                   sha1, sha2, newbase, 0, 0);
                        newbase[baselen + pathlen1] = '/';
                }
                retval = diff_tree_sha1(sha1, sha2, newbase, opt);
@@ -77,7 +77,7 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        }
 
        fullname = malloc_fullname(base, baselen, path1, pathlen1);
-       opt->change(opt, mode1, mode2, sha1, sha2, fullname);
+       opt->change(opt, mode1, mode2, sha1, sha2, fullname, 0, 0);
        free(fullname);
        return 0;
 }
@@ -241,7 +241,7 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
 
                if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE)) {
                        newbase[baselen + pathlen] = 0;
-                       opt->add_remove(opt, *prefix, mode, sha1, newbase);
+                       opt->add_remove(opt, *prefix, mode, sha1, newbase, 0);
                        newbase[baselen + pathlen] = '/';
                }
 
@@ -252,7 +252,7 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
                free(newbase);
        } else {
                char *fullname = malloc_fullname(base, baselen, path, pathlen);
-               opt->add_remove(opt, prefix[0], mode, sha1, fullname);
+               opt->add_remove(opt, prefix[0], mode, sha1, fullname, 0);
                free(fullname);
        }
 }
@@ -346,7 +346,7 @@ static void try_to_follow_renames(struct tree_desc *t1, struct tree_desc *t2, co
 
        diff_setup(&diff_opts);
        DIFF_OPT_SET(&diff_opts, RECURSIVE);
-       diff_opts.detect_rename = DIFF_DETECT_RENAME;
+       DIFF_OPT_SET(&diff_opts, FIND_COPIES_HARDER);
        diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
        diff_opts.single_follow = opt->paths[0];
        diff_opts.break_opt = opt->break_opt;
@@ -412,7 +412,7 @@ int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const cha
        init_tree_desc(&t1, tree1, size1);
        init_tree_desc(&t2, tree2, size2);
        retval = diff_tree(&t1, &t2, base, opt);
-       if (DIFF_OPT_TST(opt, FOLLOW_RENAMES) && diff_might_be_rename()) {
+       if (!*base && DIFF_OPT_TST(opt, FOLLOW_RENAMES) && diff_might_be_rename()) {
                init_tree_desc(&t1, tree1, size1);
                init_tree_desc(&t2, tree2, size2);
                try_to_follow_renames(&t1, &t2, base, opt);