Implement git remote rename

diff --git a/tree-diff.c b/tree-diff.c
index aa0a100295c5c48483c6bfbbfc0105b70680becc..9f67af6c1fbb9130962cd373d8e2ebecf543c640 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -15,6 +15,15 @@ static char *malloc_base(const char *base, int baselen, const char *path, int pa
        return newbase;
 }
 
+static char *malloc_fullname(const char *base, int baselen, const char *path, int pathlen)
+{
+       char *fullname = xmalloc(baselen + pathlen + 1);
+       memcpy(fullname, base, baselen);
+       memcpy(fullname + baselen, path, pathlen);
+       fullname[baselen + pathlen] = 0;
+       return fullname;
+}
+
 static void show_entry(struct diff_options *opt, const char *prefix, struct tree_desc *desc,
                       const char *base, int baselen);
 
@@ -24,6 +33,7 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        const char *path1, *path2;
        const unsigned char *sha1, *sha2;
        int cmp, pathlen1, pathlen2;
+       char *fullname;
 
        sha1 = tree_entry_extract(t1, &path1, &mode1);
        sha2 = tree_entry_extract(t2, &path2, &mode2);
@@ -55,15 +65,20 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode1)) {
                int retval;
                char *newbase = malloc_base(base, baselen, path1, pathlen1);
-               if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE))
+               if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE)) {
+                       newbase[baselen + pathlen1] = 0;
                        opt->change(opt, mode1, mode2,
-                                   sha1, sha2, base, path1);
+                                   sha1, sha2, newbase);
+                       newbase[baselen + pathlen1] = '/';
+               }
                retval = diff_tree_sha1(sha1, sha2, newbase, opt);
                free(newbase);
                return retval;
        }
 
-       opt->change(opt, mode1, mode2, sha1, sha2, base, path1);
+       fullname = malloc_fullname(base, baselen, path1, pathlen1);
+       opt->change(opt, mode1, mode2, sha1, sha2, fullname);
+       free(fullname);
        return 0;
 }
 
@@ -205,10 +220,10 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
        unsigned mode;
        const char *path;
        const unsigned char *sha1 = tree_entry_extract(desc, &path, &mode);
+       int pathlen = tree_entry_len(path, sha1);
 
        if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode)) {
                enum object_type type;
-               int pathlen = tree_entry_len(path, sha1);
                char *newbase = malloc_base(base, baselen, path, pathlen);
                struct tree_desc inner;
                void *tree;
@@ -224,7 +239,9 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
                free(tree);
                free(newbase);
        } else {
-               opt->add_remove(opt, prefix[0], mode, sha1, base, path);
+               char *fullname = malloc_fullname(base, baselen, path, pathlen);
+               opt->add_remove(opt, prefix[0], mode, sha1, fullname);
+               free(fullname);
        }
 }
 
@@ -286,7 +303,7 @@ int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, stru
                        update_tree_entry(t2);
                        continue;
                }
-               die("git-diff-tree: internal error");
+               die("git diff-tree: internal error");
        }
        return 0;
 }
@@ -326,6 +343,7 @@ static void try_to_follow_renames(struct tree_desc *t1, struct tree_desc *t2, co
                die("unable to set up diff options to follow renames");
        diff_tree(t1, t2, base, &diff_opts);
        diffcore_std(&diff_opts);
+       diff_tree_release_paths(&diff_opts);
 
        /* Go through the new set of filepairing, and see if we find a more interesting one */
        for (i = 0; i < q->nr; i++) {
@@ -342,6 +360,7 @@ static void try_to_follow_renames(struct tree_desc *t1, struct tree_desc *t2, co
                        choice = p;
 
                        /* Update the path we use from now on.. */
+                       diff_tree_release_paths(opt);
                        opt->paths[0] = xstrdup(p->one->path);
                        diff_tree_setup_paths(opt->paths, opt);
                        break;