git-svn: fix --rmdir when using SVN:: libraries
[gitweb.git] / revision.c
index c8d93ff106d88cd7c11a8b246d0d469301a2ffab..7bff2a10b1044651a776b42d4ee3d91661830aa2 100644 (file)
@@ -53,8 +53,9 @@ static void mark_blob_uninteresting(struct blob *blob)
 
 void mark_tree_uninteresting(struct tree *tree)
 {
+       struct tree_desc desc;
+       struct name_entry entry;
        struct object *obj = &tree->object;
-       struct tree_entry_list *entry;
 
        if (obj->flags & UNINTERESTING)
                return;
@@ -63,17 +64,22 @@ void mark_tree_uninteresting(struct tree *tree)
                return;
        if (parse_tree(tree) < 0)
                die("bad tree %s", sha1_to_hex(obj->sha1));
-       entry = tree->entries;
-       tree->entries = NULL;
-       while (entry) {
-               struct tree_entry_list *next = entry->next;
-               if (entry->directory)
-                       mark_tree_uninteresting(entry->item.tree);
+
+       desc.buf = tree->buffer;
+       desc.size = tree->size;
+       while (tree_entry(&desc, &entry)) {
+               if (S_ISDIR(entry.mode))
+                       mark_tree_uninteresting(lookup_tree(entry.sha1));
                else
-                       mark_blob_uninteresting(entry->item.blob);
-               free(entry);
-               entry = next;
+                       mark_blob_uninteresting(lookup_blob(entry.sha1));
        }
+
+       /*
+        * We don't care about the tree any more
+        * after it has been marked uninteresting.
+        */
+       free(tree->buffer);
+       tree->buffer = NULL;
 }
 
 void mark_parents_uninteresting(struct commit *commit)
@@ -116,21 +122,27 @@ static void add_pending_object(struct rev_info *revs, struct object *obj, const
        add_object(obj, &revs->pending_objects, NULL, name);
 }
 
-static struct commit *get_commit_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
+static struct object *get_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
 {
        struct object *object;
 
        object = parse_object(sha1);
        if (!object)
                die("bad object %s", name);
+       object->flags |= flags;
+       return object;
+}
+
+static struct commit *handle_commit(struct rev_info *revs, struct object *object, const char *name)
+{
+       unsigned long flags = object->flags;
 
        /*
         * Tag object? Look what it points to..
         */
-       while (object->type == tag_type) {
+       while (object->type == TYPE_TAG) {
                struct tag *tag = (struct tag *) object;
-               object->flags |= flags;
-               if (revs->tag_objects && !(object->flags & UNINTERESTING))
+               if (revs->tag_objects && !(flags & UNINTERESTING))
                        add_pending_object(revs, object, tag->tag);
                object = parse_object(tag->tagged->sha1);
                if (!object)
@@ -141,12 +153,12 @@ static struct commit *get_commit_reference(struct rev_info *revs, const char *na
         * Commit object? Just return it, we'll do all the complex
         * reachability crud.
         */
-       if (object->type == commit_type) {
+       if (object->type == TYPE_COMMIT) {
                struct commit *commit = (struct commit *)object;
-               object->flags |= flags;
                if (parse_commit(commit) < 0)
                        die("unable to parse commit %s", name);
                if (flags & UNINTERESTING) {
+                       commit->object.flags |= UNINTERESTING;
                        mark_parents_uninteresting(commit);
                        revs->limited = 1;
                }
@@ -157,7 +169,7 @@ static struct commit *get_commit_reference(struct rev_info *revs, const char *na
         * Tree object? Either mark it uniniteresting, or add it
         * to the list of objects to look at later..
         */
-       if (object->type == tree_type) {
+       if (object->type == TYPE_TREE) {
                struct tree *tree = (struct tree *)object;
                if (!revs->tree_objects)
                        return NULL;
@@ -172,7 +184,7 @@ static struct commit *get_commit_reference(struct rev_info *revs, const char *na
        /*
         * Blob object? You know the drill by now..
         */
-       if (object->type == blob_type) {
+       if (object->type == TYPE_BLOB) {
                struct blob *blob = (struct blob *)object;
                if (!revs->blob_objects)
                        return NULL;
@@ -199,31 +211,27 @@ static int everybody_uninteresting(struct commit_list *orig)
        return 1;
 }
 
-#define TREE_SAME      0
-#define TREE_NEW       1
-#define TREE_DIFFERENT 2
-static int tree_difference = TREE_SAME;
+static int tree_difference = REV_TREE_SAME;
 
 static void file_add_remove(struct diff_options *options,
                    int addremove, unsigned mode,
                    const unsigned char *sha1,
                    const char *base, const char *path)
 {
-       int diff = TREE_DIFFERENT;
+       int diff = REV_TREE_DIFFERENT;
 
        /*
-        * Is it an add of a new file? It means that
-        * the old tree didn't have it at all, so we
-        * will turn "TREE_SAME" -> "TREE_NEW", but
-        * leave any "TREE_DIFFERENT" alone (and if
-        * it already was "TREE_NEW", we'll keep it
-        * "TREE_NEW" of course).
+        * Is it an add of a new file? It means that the old tree
+        * didn't have it at all, so we will turn "REV_TREE_SAME" ->
+        * "REV_TREE_NEW", but leave any "REV_TREE_DIFFERENT" alone
+        * (and if it already was "REV_TREE_NEW", we'll keep it
+        * "REV_TREE_NEW" of course).
         */
        if (addremove == '+') {
                diff = tree_difference;
-               if (diff != TREE_SAME)
+               if (diff != REV_TREE_SAME)
                        return;
-               diff = TREE_NEW;
+               diff = REV_TREE_NEW;
        }
        tree_difference = diff;
 }
@@ -234,28 +242,23 @@ static void file_change(struct diff_options *options,
                 const unsigned char *new_sha1,
                 const char *base, const char *path)
 {
-       tree_difference = TREE_DIFFERENT;
+       tree_difference = REV_TREE_DIFFERENT;
 }
 
-static struct diff_options diff_opt = {
-       .recursive = 1,
-       .add_remove = file_add_remove,
-       .change = file_change,
-};
-
-static int compare_tree(struct tree *t1, struct tree *t2)
+int rev_compare_tree(struct rev_info *revs, struct tree *t1, struct tree *t2)
 {
        if (!t1)
-               return TREE_NEW;
+               return REV_TREE_NEW;
        if (!t2)
-               return TREE_DIFFERENT;
-       tree_difference = TREE_SAME;
-       if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0)
-               return TREE_DIFFERENT;
+               return REV_TREE_DIFFERENT;
+       tree_difference = REV_TREE_SAME;
+       if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "",
+                          &revs->pruning) < 0)
+               return REV_TREE_DIFFERENT;
        return tree_difference;
 }
 
-static int same_tree_as_empty(struct tree *t1)
+int rev_same_tree_as_empty(struct rev_info *revs, struct tree *t1)
 {
        int retval;
        void *tree;
@@ -264,7 +267,7 @@ static int same_tree_as_empty(struct tree *t1)
        if (!t1)
                return 0;
 
-       tree = read_object_with_reference(t1->object.sha1, "tree", &real.size, NULL);
+       tree = read_object_with_reference(t1->object.sha1, tree_type, &real.size, NULL);
        if (!tree)
                return 0;
        real.buf = tree;
@@ -273,7 +276,7 @@ static int same_tree_as_empty(struct tree *t1)
        empty.size = 0;
 
        tree_difference = 0;
-       retval = diff_tree(&empty, &real, "", &diff_opt);
+       retval = diff_tree(&empty, &real, "", &revs->pruning);
        free(tree);
 
        return retval >= 0 && !tree_difference;
@@ -288,7 +291,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                return;
 
        if (!commit->parents) {
-               if (!same_tree_as_empty(commit->tree))
+               if (!rev_same_tree_as_empty(revs, commit->tree))
                        commit->object.flags |= TREECHANGE;
                return;
        }
@@ -298,9 +301,9 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                struct commit *p = parent->item;
 
                parse_commit(p);
-               switch (compare_tree(p->tree, commit->tree)) {
-               case TREE_SAME:
-                       if (p->object.flags & UNINTERESTING) {
+               switch (rev_compare_tree(revs, p->tree, commit->tree)) {
+               case REV_TREE_SAME:
+                       if (!revs->simplify_history || (p->object.flags & UNINTERESTING)) {
                                /* Even if a merge with an uninteresting
                                 * side branch brought the entire change
                                 * we are interested in, we do not want
@@ -314,13 +317,22 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                        commit->parents = parent;
                        return;
 
-               case TREE_NEW:
-                       if (revs->remove_empty_trees && same_tree_as_empty(p->tree)) {
-                               *pp = parent->next;
-                               continue;
+               case REV_TREE_NEW:
+                       if (revs->remove_empty_trees &&
+                           rev_same_tree_as_empty(revs, p->tree)) {
+                               /* We are adding all the specified
+                                * paths from this parent, so the
+                                * history beyond this parent is not
+                                * interesting.  Remove its parents
+                                * (they are grandparents for us).
+                                * IOW, we pretend this parent is a
+                                * "root" commit.
+                                */
+                               parse_commit(p);
+                               p->parents = NULL;
                        }
                /* fallthrough */
-               case TREE_DIFFERENT:
+               case REV_TREE_DIFFERENT:
                        tree_changed = 1;
                        pp = &parent->next;
                        continue;
@@ -335,6 +347,10 @@ static void add_parents_to_list(struct rev_info *revs, struct commit *commit, st
 {
        struct commit_list *parent = commit->parents;
 
+       if (commit->object.flags & ADDED)
+               return;
+       commit->object.flags |= ADDED;
+
        /*
         * If the commit is uninteresting, don't try to
         * prune parents - we want the maximal uninteresting
@@ -368,8 +384,11 @@ static void add_parents_to_list(struct rev_info *revs, struct commit *commit, st
         * simplify the commit history and find the parent
         * that has no differences in the path set if one exists.
         */
-       if (revs->paths)
-               try_to_simplify_commit(revs, commit);
+       if (revs->prune_fn)
+               revs->prune_fn(revs, commit);
+
+       if (revs->no_walk)
+               return;
 
        parent = commit->parents;
        while (parent) {
@@ -391,9 +410,6 @@ static void limit_list(struct rev_info *revs)
        struct commit_list *newlist = NULL;
        struct commit_list **p = &newlist;
 
-       if (revs->paths)
-               diff_tree_setup_paths(revs->paths);
-
        while (list) {
                struct commit_list *entry = list;
                struct commit *commit = list->item;
@@ -417,24 +433,46 @@ static void limit_list(struct rev_info *revs)
                        continue;
                p = &commit_list_insert(commit, p)->next;
        }
+       if (revs->boundary) {
+               /* mark the ones that are on the result list first */
+               for (list = newlist; list; list = list->next) {
+                       struct commit *commit = list->item;
+                       commit->object.flags |= TMP_MARK;
+               }
+               for (list = newlist; list; list = list->next) {
+                       struct commit *commit = list->item;
+                       struct object *obj = &commit->object;
+                       struct commit_list *parent;
+                       if (obj->flags & UNINTERESTING)
+                               continue;
+                       for (parent = commit->parents;
+                            parent;
+                            parent = parent->next) {
+                               struct commit *pcommit = parent->item;
+                               if (!(pcommit->object.flags & UNINTERESTING))
+                                       continue;
+                               pcommit->object.flags |= BOUNDARY;
+                               if (pcommit->object.flags & TMP_MARK)
+                                       continue;
+                               pcommit->object.flags |= TMP_MARK;
+                               p = &commit_list_insert(pcommit, p)->next;
+                       }
+               }
+               for (list = newlist; list; list = list->next) {
+                       struct commit *commit = list->item;
+                       commit->object.flags &= ~TMP_MARK;
+               }
+       }
        revs->commits = newlist;
 }
 
-static void add_one_commit(struct commit *commit, struct rev_info *revs)
-{
-       if (!commit || (commit->object.flags & SEEN))
-               return;
-       commit->object.flags |= SEEN;
-       commit_list_insert(commit, &revs->commits);
-}
-
 static int all_flags;
 static struct rev_info *all_revs;
 
 static int handle_one_ref(const char *path, const unsigned char *sha1)
 {
-       struct commit *commit = get_commit_reference(all_revs, path, sha1, all_flags);
-       add_one_commit(commit, all_revs);
+       struct object *object = get_reference(all_revs, path, sha1, all_flags);
+       add_pending_object(all_revs, object, "");
        return 0;
 }
 
@@ -445,6 +483,64 @@ static void handle_all(struct rev_info *revs, unsigned flags)
        for_each_ref(handle_one_ref);
 }
 
+static int add_parents_only(struct rev_info *revs, const char *arg, int flags)
+{
+       unsigned char sha1[20];
+       struct object *it;
+       struct commit *commit;
+       struct commit_list *parents;
+
+       if (*arg == '^') {
+               flags ^= UNINTERESTING;
+               arg++;
+       }
+       if (get_sha1(arg, sha1))
+               return 0;
+       while (1) {
+               it = get_reference(revs, arg, sha1, 0);
+               if (it->type != TYPE_TAG)
+                       break;
+               memcpy(sha1, ((struct tag*)it)->tagged->sha1, 20);
+       }
+       if (it->type != TYPE_COMMIT)
+               return 0;
+       commit = (struct commit *)it;
+       for (parents = commit->parents; parents; parents = parents->next) {
+               it = &parents->item->object;
+               it->flags |= flags;
+               add_pending_object(revs, it, arg);
+       }
+       return 1;
+}
+
+void init_revisions(struct rev_info *revs)
+{
+       memset(revs, 0, sizeof(*revs));
+
+       revs->abbrev = DEFAULT_ABBREV;
+       revs->ignore_merges = 1;
+       revs->simplify_history = 1;
+       revs->pruning.recursive = 1;
+       revs->pruning.add_remove = file_add_remove;
+       revs->pruning.change = file_change;
+       revs->lifo = 1;
+       revs->dense = 1;
+       revs->prefix = setup_git_directory();
+       revs->max_age = -1;
+       revs->min_age = -1;
+       revs->max_count = -1;
+
+       revs->prune_fn = NULL;
+       revs->prune_data = NULL;
+
+       revs->topo_setter = topo_sort_default_setter;
+       revs->topo_getter = topo_sort_default_getter;
+
+       revs->commit_format = CMIT_FMT_DEFAULT;
+
+       diff_setup(&revs->diffopt);
+}
+
 /*
  * Parse revision information, filling in the "rev_info" structure,
  * and removing the used arguments from the argument list.
@@ -458,14 +554,6 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
        const char **unrecognized = argv + 1;
        int left = 1;
 
-       memset(revs, 0, sizeof(*revs));
-       revs->lifo = 1;
-       revs->dense = 1;
-       revs->prefix = setup_git_directory();
-       revs->max_age = -1;
-       revs->min_age = -1;
-       revs->max_count = -1;
-
        /* First, search for "--" */
        seen_dashdash = 0;
        for (i = 1; i < argc; i++) {
@@ -474,25 +562,26 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        continue;
                argv[i] = NULL;
                argc = i;
-               revs->paths = get_pathspec(revs->prefix, argv + i + 1);
+               revs->prune_data = get_pathspec(revs->prefix, argv + i + 1);
                seen_dashdash = 1;
                break;
        }
 
        flags = 0;
        for (i = 1; i < argc; i++) {
-               struct commit *commit;
+               struct object *object;
                const char *arg = argv[i];
                unsigned char sha1[20];
                char *dotdot;
                int local_flags;
 
                if (*arg == '-') {
+                       int opts;
                        if (!strncmp(arg, "--max-count=", 12)) {
                                revs->max_count = atoi(arg + 12);
                                continue;
                        }
-                       /* accept -<digit>, like traditilnal "head" */
+                       /* accept -<digit>, like traditional "head" */
                        if ((*arg == '-') && isdigit(arg[1])) {
                                revs->max_count = atoi(arg + 1);
                                continue;
@@ -509,32 +598,26 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strncmp(arg, "--max-age=", 10)) {
                                revs->max_age = atoi(arg + 10);
-                               revs->limited = 1;
-                               continue;
-                       }
-                       if (!strncmp(arg, "--min-age=", 10)) {
-                               revs->min_age = atoi(arg + 10);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strncmp(arg, "--since=", 8)) {
                                revs->max_age = approxidate(arg + 8);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strncmp(arg, "--after=", 8)) {
                                revs->max_age = approxidate(arg + 8);
-                               revs->limited = 1;
+                               continue;
+                       }
+                       if (!strncmp(arg, "--min-age=", 10)) {
+                               revs->min_age = atoi(arg + 10);
                                continue;
                        }
                        if (!strncmp(arg, "--before=", 9)) {
                                revs->min_age = approxidate(arg + 9);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strncmp(arg, "--until=", 8)) {
                                revs->min_age = approxidate(arg + 8);
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strcmp(arg, "--all")) {
@@ -553,13 +636,15 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strcmp(arg, "--topo-order")) {
                                revs->topo_order = 1;
-                               revs->limited = 1;
                                continue;
                        }
                        if (!strcmp(arg, "--date-order")) {
                                revs->lifo = 0;
                                revs->topo_order = 1;
-                               revs->limited = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--parents")) {
+                               revs->parents = 1;
                                continue;
                        }
                        if (!strcmp(arg, "--dense")) {
@@ -574,10 +659,14 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                                revs->remove_empty_trees = 1;
                                continue;
                        }
-                       if (!strncmp(arg, "--no-merges", 11)) {
+                       if (!strcmp(arg, "--no-merges")) {
                                revs->no_merges = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "--boundary")) {
+                               revs->boundary = 1;
+                               continue;
+                       }
                        if (!strcmp(arg, "--objects")) {
                                revs->tag_objects = 1;
                                revs->tree_objects = 1;
@@ -593,7 +682,89 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                        }
                        if (!strcmp(arg, "--unpacked")) {
                                revs->unpacked = 1;
-                               revs->limited = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "-r")) {
+                               revs->diff = 1;
+                               revs->diffopt.recursive = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "-t")) {
+                               revs->diff = 1;
+                               revs->diffopt.recursive = 1;
+                               revs->diffopt.tree_in_recursive = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "-m")) {
+                               revs->ignore_merges = 0;
+                               continue;
+                       }
+                       if (!strcmp(arg, "-c")) {
+                               revs->diff = 1;
+                               revs->dense_combined_merges = 0;
+                               revs->combine_merges = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--cc")) {
+                               revs->diff = 1;
+                               revs->dense_combined_merges = 1;
+                               revs->combine_merges = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "-v")) {
+                               revs->verbose_header = 1;
+                               continue;
+                       }
+                       if (!strncmp(arg, "--pretty", 8)) {
+                               revs->verbose_header = 1;
+                               revs->commit_format = get_commit_format(arg+8);
+                               continue;
+                       }
+                       if (!strcmp(arg, "--root")) {
+                               revs->show_root_diff = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--no-commit-id")) {
+                               revs->no_commit_id = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--always")) {
+                               revs->always_show_header = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--no-abbrev")) {
+                               revs->abbrev = 0;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--abbrev")) {
+                               revs->abbrev = DEFAULT_ABBREV;
+                               continue;
+                       }
+                       if (!strncmp(arg, "--abbrev=", 9)) {
+                               revs->abbrev = strtoul(arg + 9, NULL, 10);
+                               if (revs->abbrev < MINIMUM_ABBREV)
+                                       revs->abbrev = MINIMUM_ABBREV;
+                               else if (revs->abbrev > 40)
+                                       revs->abbrev = 40;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--abbrev-commit")) {
+                               revs->abbrev_commit = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--full-diff")) {
+                               revs->diff = 1;
+                               revs->full_diff = 1;
+                               continue;
+                       }
+                       if (!strcmp(arg, "--full-history")) {
+                               revs->simplify_history = 0;
+                               continue;
+                       }
+                       opts = diff_opt_parse(&revs->diffopt, argv+i, argc-i);
+                       if (opts > 0) {
+                               revs->diff = 1;
+                               i += opts - 1;
                                continue;
                        }
                        *unrecognized++ = arg;
@@ -603,73 +774,131 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                dotdot = strstr(arg, "..");
                if (dotdot) {
                        unsigned char from_sha1[20];
-                       char *next = dotdot + 2;
+                       const char *next = dotdot + 2;
+                       const char *this = arg;
                        *dotdot = 0;
                        if (!*next)
                                next = "HEAD";
-                       if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) {
-                               struct commit *exclude;
-                               struct commit *include;
-
-                               exclude = get_commit_reference(revs, arg, from_sha1, flags ^ UNINTERESTING);
-                               include = get_commit_reference(revs, next, sha1, flags);
+                       if (dotdot == arg)
+                               this = "HEAD";
+                       if (!get_sha1(this, from_sha1) &&
+                           !get_sha1(next, sha1)) {
+                               struct object *exclude;
+                               struct object *include;
+
+                               exclude = get_reference(revs, this, from_sha1, flags ^ UNINTERESTING);
+                               include = get_reference(revs, next, sha1, flags);
                                if (!exclude || !include)
                                        die("Invalid revision range %s..%s", arg, next);
-                               add_one_commit(exclude, revs);
-                               add_one_commit(include, revs);
+
+                               if (!seen_dashdash) {
+                                       *dotdot = '.';
+                                       verify_non_filename(revs->prefix, arg);
+                               }
+                               add_pending_object(revs, exclude, this);
+                               add_pending_object(revs, include, next);
                                continue;
                        }
                        *dotdot = '.';
                }
+               dotdot = strstr(arg, "^@");
+               if (dotdot && !dotdot[2]) {
+                       *dotdot = 0;
+                       if (add_parents_only(revs, arg, flags))
+                               continue;
+                       *dotdot = '^';
+               }
                local_flags = 0;
                if (*arg == '^') {
                        local_flags = UNINTERESTING;
                        arg++;
                }
-               if (get_sha1(arg, sha1) < 0) {
-                       struct stat st;
+               if (get_sha1(arg, sha1)) {
                        int j;
 
                        if (seen_dashdash || local_flags)
                                die("bad revision '%s'", arg);
 
-                       /* If we didn't have a "--", all filenames must exist */
-                       for (j = i; j < argc; j++) {
-                               if (lstat(argv[j], &st) < 0)
-                                       die("'%s': %s", arg, strerror(errno));
-                       }
-                       revs->paths = get_pathspec(revs->prefix, argv + i);
+                       /* If we didn't have a "--":
+                        * (1) all filenames must exist;
+                        * (2) all rev-args must not be interpretable
+                        *     as a valid filename.
+                        * but the latter we have checked in the main loop.
+                        */
+                       for (j = i; j < argc; j++)
+                               verify_filename(revs->prefix, argv[j]);
+
+                       revs->prune_data = get_pathspec(revs->prefix, argv + i);
                        break;
                }
-               commit = get_commit_reference(revs, arg, sha1, flags ^ local_flags);
-               add_one_commit(commit, revs);
+               if (!seen_dashdash)
+                       verify_non_filename(revs->prefix, arg);
+               object = get_reference(revs, arg, sha1, flags ^ local_flags);
+               add_pending_object(revs, object, arg);
        }
-       if (def && !revs->commits) {
+       if (def && !revs->pending_objects) {
                unsigned char sha1[20];
-               struct commit *commit;
-               if (get_sha1(def, sha1) < 0)
+               struct object *object;
+               if (get_sha1(def, sha1))
                        die("bad default revision '%s'", def);
-               commit = get_commit_reference(revs, def, sha1, 0);
-               add_one_commit(commit, revs);
+               object = get_reference(revs, def, sha1, 0);
+               add_pending_object(revs, object, def);
        }
-       if (revs->paths)
+
+       if (revs->topo_order || revs->unpacked)
                revs->limited = 1;
+
+       if (revs->prune_data) {
+               diff_tree_setup_paths(revs->prune_data, &revs->pruning);
+               revs->prune_fn = try_to_simplify_commit;
+               if (!revs->full_diff)
+                       diff_tree_setup_paths(revs->prune_data, &revs->diffopt);
+       }
+       if (revs->combine_merges) {
+               revs->ignore_merges = 0;
+               if (revs->dense_combined_merges &&
+                   (revs->diffopt.output_format != DIFF_FORMAT_DIFFSTAT))
+                       revs->diffopt.output_format = DIFF_FORMAT_PATCH;
+       }
+       revs->diffopt.abbrev = revs->abbrev;
+       diff_setup_done(&revs->diffopt);
+
        return left;
 }
 
 void prepare_revision_walk(struct rev_info *revs)
 {
-       sort_by_date(&revs->commits);
+       struct object_list *list;
+
+       list = revs->pending_objects;
+       revs->pending_objects = NULL;
+       while (list) {
+               struct commit *commit = handle_commit(revs, list->item, list->name);
+               if (commit) {
+                       if (!(commit->object.flags & SEEN)) {
+                               commit->object.flags |= SEEN;
+                               insert_by_date(commit, &revs->commits);
+                       }
+               }
+               list = list->next;
+       }
+
+       if (revs->no_walk)
+               return;
        if (revs->limited)
                limit_list(revs);
        if (revs->topo_order)
-               sort_in_topological_order(&revs->commits, revs->lifo);
+               sort_in_topological_order_fn(&revs->commits, revs->lifo,
+                                            revs->topo_setter,
+                                            revs->topo_getter);
 }
 
-static int rewrite_one(struct commit **pp)
+static int rewrite_one(struct rev_info *revs, struct commit **pp)
 {
        for (;;) {
                struct commit *p = *pp;
+               if (!revs->limited)
+                       add_parents_to_list(revs, p, &revs->commits);
                if (p->object.flags & (TREECHANGE | UNINTERESTING))
                        return 0;
                if (!p->parents)
@@ -678,12 +907,12 @@ static int rewrite_one(struct commit **pp)
        }
 }
 
-static void rewrite_parents(struct commit *commit)
+static void rewrite_parents(struct rev_info *revs, struct commit *commit)
 {
        struct commit_list **pp = &commit->parents;
        while (*pp) {
                struct commit_list *parent = *pp;
-               if (rewrite_one(&parent->item) < 0) {
+               if (rewrite_one(revs, &parent->item) < 0) {
                        *pp = parent->next;
                        continue;
                }
@@ -691,6 +920,17 @@ static void rewrite_parents(struct commit *commit)
        }
 }
 
+static void mark_boundary_to_show(struct commit *commit)
+{
+       struct commit_list *p = commit->parents;
+       while (p) {
+               commit = p->item;
+               p = p->next;
+               if (commit->object.flags & BOUNDARY)
+                       commit->object.flags |= BOUNDARY_SHOW;
+       }
+}
+
 struct commit *get_revision(struct rev_info *revs)
 {
        struct commit_list *list = revs->commits;
@@ -709,28 +949,57 @@ struct commit *get_revision(struct rev_info *revs)
        }
 
        do {
-               struct commit *commit = revs->commits->item;
+               struct commit_list *entry = revs->commits;
+               struct commit *commit = entry->item;
+
+               revs->commits = entry->next;
+               free(entry);
+
+               /*
+                * If we haven't done the list limiting, we need to look at
+                * the parents here. We also need to do the date-based limiting
+                * that we'd otherwise have done in limit_list().
+                */
+               if (!revs->limited) {
+                       if ((revs->unpacked &&
+                            has_sha1_pack(commit->object.sha1)) ||
+                           (revs->max_age != -1 &&
+                            (commit->date < revs->max_age)))
+                               continue;
+                       add_parents_to_list(revs, commit, &revs->commits);
+               }
+               if (commit->object.flags & SHOWN)
+                       continue;
 
-               if (commit->object.flags & (UNINTERESTING|SHOWN))
-                       goto next;
+               /* We want to show boundary commits only when their
+                * children are shown.  When path-limiter is in effect,
+                * rewrite_parents() drops some commits from getting shown,
+                * and there is no point showing boundary parents that
+                * are not shown.  After rewrite_parents() rewrites the
+                * parents of a commit that is shown, we mark the boundary
+                * parents with BOUNDARY_SHOW.
+                */
+               if (commit->object.flags & BOUNDARY_SHOW) {
+                       commit->object.flags |= SHOWN;
+                       return commit;
+               }
+               if (commit->object.flags & UNINTERESTING)
+                       continue;
                if (revs->min_age != -1 && (commit->date > revs->min_age))
-                       goto next;
-               if (revs->max_age != -1 && (commit->date < revs->max_age))
-                       return NULL;
-               if (revs->no_merges && commit->parents && commit->parents->next)
-                       goto next;
-               if (revs->paths && revs->dense) {
+                       continue;
+               if (revs->no_merges &&
+                   commit->parents && commit->parents->next)
+                       continue;
+               if (revs->prune_fn && revs->dense) {
                        if (!(commit->object.flags & TREECHANGE))
-                               goto next;
-                       rewrite_parents(commit);
+                               continue;
+                       if (revs->parents)
+                               rewrite_parents(revs, commit);
                }
-               /* More to go? */
-               if (revs->max_count)
-                       pop_most_recent_commit(&revs->commits, SEEN);
+               if (revs->boundary)
+                       mark_boundary_to_show(commit);
                commit->object.flags |= SHOWN;
                return commit;
-next:
-               pop_most_recent_commit(&revs->commits, SEEN);
        } while (revs->commits);
        return NULL;
 }