sequencer: use edit_todo_list() in complete_action()
[gitweb.git] / revision.c
index de4dce600d00282655907e9014228791a352f813..13e0519c0241635c0c1fd14a7ff12e9478c70bd4 100644 (file)
@@ -24,6 +24,9 @@
 #include "packfile.h"
 #include "worktree.h"
 #include "argv-array.h"
+#include "commit-reach.h"
+#include "commit-graph.h"
+#include "prio-queue.h"
 
 volatile show_early_output_fn_t show_early_output;
 
@@ -51,7 +54,8 @@ static void mark_blob_uninteresting(struct blob *blob)
        blob->object.flags |= UNINTERESTING;
 }
 
-static void mark_tree_contents_uninteresting(struct tree *tree)
+static void mark_tree_contents_uninteresting(struct repository *r,
+                                            struct tree *tree)
 {
        struct tree_desc desc;
        struct name_entry entry;
@@ -63,10 +67,10 @@ static void mark_tree_contents_uninteresting(struct tree *tree)
        while (tree_entry(&desc, &entry)) {
                switch (object_type(entry.mode)) {
                case OBJ_TREE:
-                       mark_tree_uninteresting(lookup_tree(the_repository, entry.oid));
+                       mark_tree_uninteresting(r, lookup_tree(r, entry.oid));
                        break;
                case OBJ_BLOB:
-                       mark_blob_uninteresting(lookup_blob(the_repository, entry.oid));
+                       mark_blob_uninteresting(lookup_blob(r, entry.oid));
                        break;
                default:
                        /* Subproject commit - not in this repository */
@@ -81,7 +85,7 @@ static void mark_tree_contents_uninteresting(struct tree *tree)
        free_tree_buffer(tree);
 }
 
-void mark_tree_uninteresting(struct tree *tree)
+void mark_tree_uninteresting(struct repository *r, struct tree *tree)
 {
        struct object *obj;
 
@@ -92,7 +96,7 @@ void mark_tree_uninteresting(struct tree *tree)
        if (obj->flags & UNINTERESTING)
                return;
        obj->flags |= UNINTERESTING;
-       mark_tree_contents_uninteresting(tree);
+       mark_tree_contents_uninteresting(r, tree);
 }
 
 struct commit_stack {
@@ -175,7 +179,6 @@ static void add_pending_object_with_path(struct rev_info *revs,
                strbuf_release(&buf);
                return; /* do not add the commit itself */
        }
-       obj->flags |= USER_GIVEN;
        add_object_array_with_path(obj, name, &revs->pending, mode, path);
 }
 
@@ -198,7 +201,7 @@ void add_head_to_pending(struct rev_info *revs)
        struct object *obj;
        if (get_oid("HEAD", &oid))
                return;
-       obj = parse_object(the_repository, &oid);
+       obj = parse_object(revs->repo, &oid);
        if (!obj)
                return;
        add_pending_object(revs, obj, "HEAD");
@@ -210,7 +213,7 @@ static struct object *get_reference(struct rev_info *revs, const char *name,
 {
        struct object *object;
 
-       object = parse_object(the_repository, oid);
+       object = parse_object(revs->repo, oid);
        if (!object) {
                if (revs->ignore_missing)
                        return object;
@@ -247,7 +250,7 @@ static struct commit *handle_commit(struct rev_info *revs,
                        add_pending_object(revs, object, tag->tag);
                if (!tag->tagged)
                        die("bad tag");
-               object = parse_object(the_repository, &tag->tagged->oid);
+               object = parse_object(revs->repo, &tag->tagged->oid);
                if (!object) {
                        if (revs->ignore_missing_links || (flags & UNINTERESTING))
                                return NULL;
@@ -297,7 +300,7 @@ static struct commit *handle_commit(struct rev_info *revs,
                if (!revs->tree_objects)
                        return NULL;
                if (flags & UNINTERESTING) {
-                       mark_tree_contents_uninteresting(tree);
+                       mark_tree_contents_uninteresting(revs->repo, tree);
                        return NULL;
                }
                add_pending_object_with_path(revs, object, name, mode, path);
@@ -766,8 +769,8 @@ static void commit_list_insert_by_date_cached(struct commit *p, struct commit_li
                *cache = new_entry;
 }
 
-static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
-                   struct commit_list **list, struct commit_list **cache_ptr)
+static int process_parents(struct rev_info *revs, struct commit *commit,
+                          struct commit_list **list, struct commit_list **cache_ptr)
 {
        struct commit_list *parent = commit->parents;
        unsigned left_flag;
@@ -806,7 +809,8 @@ static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
                        if (p->object.flags & SEEN)
                                continue;
                        p->object.flags |= SEEN;
-                       commit_list_insert_by_date_cached(p, list, cached_base, cache_ptr);
+                       if (list)
+                               commit_list_insert_by_date_cached(p, list, cached_base, cache_ptr);
                }
                return 0;
        }
@@ -845,7 +849,8 @@ static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
                p->object.flags |= left_flag;
                if (!(p->object.flags & SEEN)) {
                        p->object.flags |= SEEN;
-                       commit_list_insert_by_date_cached(p, list, cached_base, cache_ptr);
+                       if (list)
+                               commit_list_insert_by_date_cached(p, list, cached_base, cache_ptr);
                }
                if (revs->first_parent_only)
                        break;
@@ -877,7 +882,7 @@ static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
                return;
 
        left_first = left_count < right_count;
-       init_patch_ids(&ids);
+       init_patch_ids(revs->repo, &ids);
        ids.diffopts.pathspec = revs->diffopt.pathspec;
 
        /* Compute patch-ids for one side */
@@ -1089,7 +1094,7 @@ static int limit_list(struct rev_info *revs)
 
                if (revs->max_age != -1 && (commit->date < revs->max_age))
                        obj->flags |= UNINTERESTING;
-               if (add_parents_to_list(revs, commit, &list, NULL) < 0)
+               if (process_parents(revs, commit, &list, NULL) < 0)
                        return -1;
                if (obj->flags & UNINTERESTING) {
                        mark_parents_uninteresting(commit);
@@ -1176,7 +1181,7 @@ struct all_refs_cb {
        int warned_bad_reflog;
        struct rev_info *all_revs;
        const char *name_for_errormsg;
-       struct ref_store *refs;
+       struct worktree *wt;
 };
 
 int ref_excluded(struct string_list *ref_excludes, const char *path)
@@ -1213,7 +1218,7 @@ static void init_all_refs_cb(struct all_refs_cb *cb, struct rev_info *revs,
        cb->all_revs = revs;
        cb->all_flags = flags;
        revs->rev_input_given = 1;
-       cb->refs = NULL;
+       cb->wt = NULL;
 }
 
 void clear_ref_exclusion(struct string_list **ref_excludes_p)
@@ -1253,7 +1258,7 @@ static void handle_one_reflog_commit(struct object_id *oid, void *cb_data)
 {
        struct all_refs_cb *cb = cb_data;
        if (!is_null_oid(oid)) {
-               struct object *o = parse_object(the_repository, oid);
+               struct object *o = parse_object(cb->all_revs->repo, oid);
                if (o) {
                        o->flags |= cb->all_flags;
                        /* ??? CMDLINEFLAGS ??? */
@@ -1276,14 +1281,20 @@ static int handle_one_reflog_ent(struct object_id *ooid, struct object_id *noid,
        return 0;
 }
 
-static int handle_one_reflog(const char *path, const struct object_id *oid,
+static int handle_one_reflog(const char *refname_in_wt,
+                            const struct object_id *oid,
                             int flag, void *cb_data)
 {
        struct all_refs_cb *cb = cb_data;
+       struct strbuf refname = STRBUF_INIT;
+
        cb->warned_bad_reflog = 0;
-       cb->name_for_errormsg = path;
-       refs_for_each_reflog_ent(cb->refs, path,
+       strbuf_worktree_ref(cb->wt, &refname, refname_in_wt);
+       cb->name_for_errormsg = refname.buf;
+       refs_for_each_reflog_ent(get_main_ref_store(the_repository),
+                                refname.buf,
                                 handle_one_reflog_ent, cb_data);
+       strbuf_release(&refname);
        return 0;
 }
 
@@ -1298,8 +1309,8 @@ static void add_other_reflogs_to_pending(struct all_refs_cb *cb)
                if (wt->is_current)
                        continue;
 
-               cb->refs = get_worktree_ref_store(wt);
-               refs_for_each_reflog(cb->refs,
+               cb->wt = wt;
+               refs_for_each_reflog(get_worktree_ref_store(wt),
                                     handle_one_reflog,
                                     cb);
        }
@@ -1312,7 +1323,7 @@ void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
 
        cb.all_revs = revs;
        cb.all_flags = flags;
-       cb.refs = get_main_ref_store(the_repository);
+       cb.wt = NULL;
        for_each_reflog(handle_one_reflog, &cb);
 
        if (!revs->single_worktree)
@@ -1320,13 +1331,14 @@ void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
 }
 
 static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
-                          struct strbuf *path)
+                          struct strbuf *path, unsigned int flags)
 {
        size_t baselen = path->len;
        int i;
 
        if (it->entry_count >= 0) {
-               struct tree *tree = lookup_tree(the_repository, &it->oid);
+               struct tree *tree = lookup_tree(revs->repo, &it->oid);
+               tree->object.flags |= flags;
                add_pending_object_with_path(revs, &tree->object, "",
                                             040000, path->buf);
        }
@@ -1334,14 +1346,15 @@ static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
        for (i = 0; i < it->subtree_nr; i++) {
                struct cache_tree_sub *sub = it->down[i];
                strbuf_addf(path, "%s%s", baselen ? "/" : "", sub->name);
-               add_cache_tree(sub->cache_tree, revs, path);
+               add_cache_tree(sub->cache_tree, revs, path, flags);
                strbuf_setlen(path, baselen);
        }
 
 }
 
 static void do_add_index_objects_to_pending(struct rev_info *revs,
-                                           struct index_state *istate)
+                                           struct index_state *istate,
+                                           unsigned int flags)
 {
        int i;
 
@@ -1352,16 +1365,17 @@ static void do_add_index_objects_to_pending(struct rev_info *revs,
                if (S_ISGITLINK(ce->ce_mode))
                        continue;
 
-               blob = lookup_blob(the_repository, &ce->oid);
+               blob = lookup_blob(revs->repo, &ce->oid);
                if (!blob)
                        die("unable to add index blob to traversal");
+               blob->object.flags |= flags;
                add_pending_object_with_path(revs, &blob->object, "",
                                             ce->ce_mode, ce->name);
        }
 
        if (istate->cache_tree) {
                struct strbuf path = STRBUF_INIT;
-               add_cache_tree(istate->cache_tree, revs, &path);
+               add_cache_tree(istate->cache_tree, revs, &path, flags);
                strbuf_release(&path);
        }
 }
@@ -1370,8 +1384,8 @@ void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
 {
        struct worktree **worktrees, **p;
 
-       read_cache();
-       do_add_index_objects_to_pending(revs, &the_index);
+       read_index(revs->repo->index);
+       do_add_index_objects_to_pending(revs, revs->repo->index, flags);
 
        if (revs->single_worktree)
                return;
@@ -1387,7 +1401,7 @@ void add_index_objects_to_pending(struct rev_info *revs, unsigned int flags)
                if (read_index_from(&istate,
                                    worktree_git_path(wt, "index"),
                                    get_worktree_git_dir(wt)) > 0)
-                       do_add_index_objects_to_pending(revs, &istate);
+                       do_add_index_objects_to_pending(revs, &istate, flags);
                discard_index(&istate);
        }
        free_worktrees(worktrees);
@@ -1439,10 +1453,13 @@ static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
        return 1;
 }
 
-void init_revisions(struct rev_info *revs, const char *prefix)
+void repo_init_revisions(struct repository *r,
+                        struct rev_info *revs,
+                        const char *prefix)
 {
        memset(revs, 0, sizeof(*revs));
 
+       revs->repo = r;
        revs->abbrev = DEFAULT_ABBREV;
        revs->ignore_merges = 1;
        revs->simplify_history = 1;
@@ -1464,11 +1481,11 @@ void init_revisions(struct rev_info *revs, const char *prefix)
        revs->commit_format = CMIT_FMT_DEFAULT;
        revs->expand_tabs_in_log_default = 8;
 
-       init_grep_defaults();
-       grep_init(&revs->grep_filter, prefix);
+       init_grep_defaults(revs->repo);
+       grep_init(&revs->grep_filter, revs->repo, prefix);
        revs->grep_filter.status_only = 1;
 
-       diff_setup(&revs->diffopt);
+       repo_diff_setup(revs->repo, &revs->diffopt);
        if (prefix && !revs->diffopt.prefix) {
                revs->diffopt.prefix = prefix;
                revs->diffopt.prefix_length = strlen(prefix);
@@ -1496,6 +1513,7 @@ static void prepare_show_merge(struct rev_info *revs)
        struct object_id oid;
        const char **prune = NULL;
        int i, prune_num = 1; /* counting terminating NULL */
+       struct index_state *istate = revs->repo->index;
 
        if (get_oid("HEAD", &oid))
                die("--merge without HEAD?");
@@ -1511,20 +1529,20 @@ static void prepare_show_merge(struct rev_info *revs)
        free_commit_list(bases);
        head->object.flags |= SYMMETRIC_LEFT;
 
-       if (!active_nr)
-               read_cache();
-       for (i = 0; i < active_nr; i++) {
-               const struct cache_entry *ce = active_cache[i];
+       if (!istate->cache_nr)
+               read_index(istate);
+       for (i = 0; i < istate->cache_nr; i++) {
+               const struct cache_entry *ce = istate->cache[i];
                if (!ce_stage(ce))
                        continue;
-               if (ce_path_match(&the_index, ce, &revs->prune_data, NULL)) {
+               if (ce_path_match(istate, ce, &revs->prune_data, NULL)) {
                        prune_num++;
                        REALLOC_ARRAY(prune, prune_num);
                        prune[prune_num-2] = ce->name;
                        prune[prune_num-1] = NULL;
                }
-               while ((i+1 < active_nr) &&
-                      ce_same_name(ce, active_cache[i+1]))
+               while ((i+1 < istate->cache_nr) &&
+                      ce_same_name(ce, istate->cache[i+1]))
                        i++;
        }
        clear_pathspec(&revs->prune_data);
@@ -1581,8 +1599,8 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
                *dotdot = '\0';
        }
 
-       a_obj = parse_object(the_repository, &a_oid);
-       b_obj = parse_object(the_repository, &b_oid);
+       a_obj = parse_object(revs->repo, &a_oid);
+       b_obj = parse_object(revs->repo, &b_oid);
        if (!a_obj || !b_obj)
                return dotdot_missing(arg, dotdot, revs, symmetric);
 
@@ -1595,8 +1613,8 @@ static int handle_dotdot_1(const char *arg, char *dotdot,
                struct commit *a, *b;
                struct commit_list *exclude;
 
-               a = lookup_commit_reference(the_repository, &a_obj->oid);
-               b = lookup_commit_reference(the_repository, &b_obj->oid);
+               a = lookup_commit_reference(revs->repo, &a_obj->oid);
+               b = lookup_commit_reference(revs->repo, &b_obj->oid);
                if (!a || !b)
                        return dotdot_missing(arg, dotdot, revs, symmetric);
 
@@ -2133,7 +2151,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
                revs->limited = 1;
        } else if (!strcmp(arg, "--ignore-missing")) {
                revs->ignore_missing = 1;
-       } else if (!strcmp(arg, "--exclude-promisor-objects")) {
+       } else if (revs->allow_exclude_promisor_objects_opt &&
+                  !strcmp(arg, "--exclude-promisor-objects")) {
                if (fetch_if_missing)
                        BUG("exclude_promisor_objects can only be used when fetch_if_missing is 0");
                revs->exclude_promisor_objects = 1;
@@ -2204,7 +2223,7 @@ static int handle_revision_pseudo_opt(const char *submodule,
                        BUG("--single-worktree cannot be used together with submodule");
                refs = get_submodule_ref_store(submodule);
        } else
-               refs = get_main_ref_store(the_repository);
+               refs = get_main_ref_store(revs->repo);
 
        /*
         * NOTE!
@@ -2318,7 +2337,7 @@ static void NORETURN diagnose_missing_default(const char *def)
  */
 int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct setup_revision_opt *opt)
 {
-       int i, flags, left, seen_dashdash, read_from_stdin, got_rev_arg = 0, revarg_opt;
+       int i, flags, left, seen_dashdash, got_rev_arg = 0, revarg_opt;
        struct argv_array prune_data = ARGV_ARRAY_INIT;
        const char *submodule = NULL;
 
@@ -2348,7 +2367,6 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
        revarg_opt = opt ? opt->revarg_opt : 0;
        if (seen_dashdash)
                revarg_opt |= REVARG_CANNOT_BE_FILENAME;
-       read_from_stdin = 0;
        for (left = i = 1; i < argc; i++) {
                const char *arg = argv[i];
                if (*arg == '-') {
@@ -2367,7 +2385,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
                                        argv[left++] = arg;
                                        continue;
                                }
-                               if (read_from_stdin++)
+                               if (revs->read_from_stdin++)
                                        die("--stdin given twice?");
                                read_revisions_from_stdin(revs, &prune_data);
                                continue;
@@ -2454,7 +2472,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
        if (revs->diffopt.objfind)
                revs->simplify_history = 0;
 
-       if (revs->topo_order)
+       if (revs->topo_order && !generation_numbers_enabled(the_repository))
                revs->limited = 1;
 
        if (revs->prune_data.nr) {
@@ -2885,13 +2903,225 @@ void reset_revision_walk(void)
 static int mark_uninteresting(const struct object_id *oid,
                              struct packed_git *pack,
                              uint32_t pos,
-                             void *unused)
+                             void *cb)
 {
-       struct object *o = parse_object(the_repository, oid);
+       struct rev_info *revs = cb;
+       struct object *o = parse_object(revs->repo, oid);
        o->flags |= UNINTERESTING | SEEN;
        return 0;
 }
 
+define_commit_slab(indegree_slab, int);
+define_commit_slab(author_date_slab, timestamp_t);
+
+struct topo_walk_info {
+       uint32_t min_generation;
+       struct prio_queue explore_queue;
+       struct prio_queue indegree_queue;
+       struct prio_queue topo_queue;
+       struct indegree_slab indegree;
+       struct author_date_slab author_date;
+};
+
+static inline void test_flag_and_insert(struct prio_queue *q, struct commit *c, int flag)
+{
+       if (c->object.flags & flag)
+               return;
+
+       c->object.flags |= flag;
+       prio_queue_put(q, c);
+}
+
+static void explore_walk_step(struct rev_info *revs)
+{
+       struct topo_walk_info *info = revs->topo_walk_info;
+       struct commit_list *p;
+       struct commit *c = prio_queue_get(&info->explore_queue);
+
+       if (!c)
+               return;
+
+       if (parse_commit_gently(c, 1) < 0)
+               return;
+
+       if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
+               record_author_date(&info->author_date, c);
+
+       if (revs->max_age != -1 && (c->date < revs->max_age))
+               c->object.flags |= UNINTERESTING;
+
+       if (process_parents(revs, c, NULL, NULL) < 0)
+               return;
+
+       if (c->object.flags & UNINTERESTING)
+               mark_parents_uninteresting(c);
+
+       for (p = c->parents; p; p = p->next)
+               test_flag_and_insert(&info->explore_queue, p->item, TOPO_WALK_EXPLORED);
+}
+
+static void explore_to_depth(struct rev_info *revs,
+                            uint32_t gen_cutoff)
+{
+       struct topo_walk_info *info = revs->topo_walk_info;
+       struct commit *c;
+       while ((c = prio_queue_peek(&info->explore_queue)) &&
+              c->generation >= gen_cutoff)
+               explore_walk_step(revs);
+}
+
+static void indegree_walk_step(struct rev_info *revs)
+{
+       struct commit_list *p;
+       struct topo_walk_info *info = revs->topo_walk_info;
+       struct commit *c = prio_queue_get(&info->indegree_queue);
+
+       if (!c)
+               return;
+
+       if (parse_commit_gently(c, 1) < 0)
+               return;
+
+       explore_to_depth(revs, c->generation);
+
+       for (p = c->parents; p; p = p->next) {
+               struct commit *parent = p->item;
+               int *pi = indegree_slab_at(&info->indegree, parent);
+
+               if (*pi)
+                       (*pi)++;
+               else
+                       *pi = 2;
+
+               test_flag_and_insert(&info->indegree_queue, parent, TOPO_WALK_INDEGREE);
+
+               if (revs->first_parent_only)
+                       return;
+       }
+}
+
+static void compute_indegrees_to_depth(struct rev_info *revs,
+                                      uint32_t gen_cutoff)
+{
+       struct topo_walk_info *info = revs->topo_walk_info;
+       struct commit *c;
+       while ((c = prio_queue_peek(&info->indegree_queue)) &&
+              c->generation >= gen_cutoff)
+               indegree_walk_step(revs);
+}
+
+static void init_topo_walk(struct rev_info *revs)
+{
+       struct topo_walk_info *info;
+       struct commit_list *list;
+       revs->topo_walk_info = xmalloc(sizeof(struct topo_walk_info));
+       info = revs->topo_walk_info;
+       memset(info, 0, sizeof(struct topo_walk_info));
+
+       init_indegree_slab(&info->indegree);
+       memset(&info->explore_queue, 0, sizeof(info->explore_queue));
+       memset(&info->indegree_queue, 0, sizeof(info->indegree_queue));
+       memset(&info->topo_queue, 0, sizeof(info->topo_queue));
+
+       switch (revs->sort_order) {
+       default: /* REV_SORT_IN_GRAPH_ORDER */
+               info->topo_queue.compare = NULL;
+               break;
+       case REV_SORT_BY_COMMIT_DATE:
+               info->topo_queue.compare = compare_commits_by_commit_date;
+               break;
+       case REV_SORT_BY_AUTHOR_DATE:
+               init_author_date_slab(&info->author_date);
+               info->topo_queue.compare = compare_commits_by_author_date;
+               info->topo_queue.cb_data = &info->author_date;
+               break;
+       }
+
+       info->explore_queue.compare = compare_commits_by_gen_then_commit_date;
+       info->indegree_queue.compare = compare_commits_by_gen_then_commit_date;
+
+       info->min_generation = GENERATION_NUMBER_INFINITY;
+       for (list = revs->commits; list; list = list->next) {
+               struct commit *c = list->item;
+
+               if (parse_commit_gently(c, 1))
+                       continue;
+
+               test_flag_and_insert(&info->explore_queue, c, TOPO_WALK_EXPLORED);
+               test_flag_and_insert(&info->indegree_queue, c, TOPO_WALK_INDEGREE);
+
+               if (c->generation < info->min_generation)
+                       info->min_generation = c->generation;
+
+               *(indegree_slab_at(&info->indegree, c)) = 1;
+
+               if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
+                       record_author_date(&info->author_date, c);
+       }
+       compute_indegrees_to_depth(revs, info->min_generation);
+
+       for (list = revs->commits; list; list = list->next) {
+               struct commit *c = list->item;
+
+               if (*(indegree_slab_at(&info->indegree, c)) == 1)
+                       prio_queue_put(&info->topo_queue, c);
+       }
+
+       /*
+        * This is unfortunate; the initial tips need to be shown
+        * in the order given from the revision traversal machinery.
+        */
+       if (revs->sort_order == REV_SORT_IN_GRAPH_ORDER)
+               prio_queue_reverse(&info->topo_queue);
+}
+
+static struct commit *next_topo_commit(struct rev_info *revs)
+{
+       struct commit *c;
+       struct topo_walk_info *info = revs->topo_walk_info;
+
+       /* pop next off of topo_queue */
+       c = prio_queue_get(&info->topo_queue);
+
+       if (c)
+               *(indegree_slab_at(&info->indegree, c)) = 0;
+
+       return c;
+}
+
+static void expand_topo_walk(struct rev_info *revs, struct commit *commit)
+{
+       struct commit_list *p;
+       struct topo_walk_info *info = revs->topo_walk_info;
+       if (process_parents(revs, commit, NULL, NULL) < 0) {
+               if (!revs->ignore_missing_links)
+                       die("Failed to traverse parents of commit %s",
+                           oid_to_hex(&commit->object.oid));
+       }
+
+       for (p = commit->parents; p; p = p->next) {
+               struct commit *parent = p->item;
+               int *pi;
+
+               if (parse_commit_gently(parent, 1) < 0)
+                       continue;
+
+               if (parent->generation < info->min_generation) {
+                       info->min_generation = parent->generation;
+                       compute_indegrees_to_depth(revs, info->min_generation);
+               }
+
+               pi = indegree_slab_at(&info->indegree, parent);
+
+               (*pi)--;
+               if (*pi == 1)
+                       prio_queue_put(&info->topo_queue, parent);
+
+               if (revs->first_parent_only)
+                       return;
+       }
+}
+
 int prepare_revision_walk(struct rev_info *revs)
 {
        int i;
@@ -2920,7 +3150,7 @@ int prepare_revision_walk(struct rev_info *revs)
                revs->treesame.name = "treesame";
 
        if (revs->exclude_promisor_objects) {
-               for_each_packed_object(mark_uninteresting, NULL,
+               for_each_packed_object(mark_uninteresting, revs,
                                       FOR_EACH_OBJECT_PROMISOR_ONLY);
        }
 
@@ -2928,11 +3158,13 @@ int prepare_revision_walk(struct rev_info *revs)
                commit_list_sort_by_date(&revs->commits);
        if (revs->no_walk)
                return 0;
-       if (revs->limited)
+       if (revs->limited) {
                if (limit_list(revs) < 0)
                        return -1;
-       if (revs->topo_order)
-               sort_in_topological_order(&revs->commits, revs->sort_order);
+               if (revs->topo_order)
+                       sort_in_topological_order(&revs->commits, revs->sort_order);
+       } else if (revs->topo_order)
+               init_topo_walk(revs);
        if (revs->line_level_traverse)
                line_log_filter(revs);
        if (revs->simplify_merges)
@@ -2949,7 +3181,7 @@ static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp
        for (;;) {
                struct commit *p = *pp;
                if (!revs->limited)
-                       if (add_parents_to_list(revs, p, &revs->commits, &cache) < 0)
+                       if (process_parents(revs, p, &revs->commits, &cache) < 0)
                                return rewrite_one_error;
                if (p->object.flags & UNINTERESTING)
                        return rewrite_one_ok;
@@ -3238,7 +3470,7 @@ static void track_linear(struct rev_info *revs, struct commit *commit)
                struct commit_list *p;
                for (p = revs->previous_parents; p; p = p->next)
                        if (p->item == NULL || /* first commit */
-                           !oidcmp(&p->item->object.oid, &commit->object.oid))
+                           oideq(&p->item->object.oid, &commit->object.oid))
                                break;
                revs->linear = p != NULL;
        }
@@ -3257,6 +3489,8 @@ static struct commit *get_revision_1(struct rev_info *revs)
 
                if (revs->reflog_info)
                        commit = next_reflog_entry(revs->reflog_info);
+               else if (revs->topo_walk_info)
+                       commit = next_topo_commit(revs);
                else
                        commit = pop_commit(&revs->commits);
 
@@ -3278,7 +3512,9 @@ static struct commit *get_revision_1(struct rev_info *revs)
 
                        if (revs->reflog_info)
                                try_to_simplify_commit(revs, commit);
-                       else if (add_parents_to_list(revs, commit, &revs->commits, NULL) < 0) {
+                       else if (revs->topo_walk_info)
+                               expand_topo_walk(revs, commit);
+                       else if (process_parents(revs, commit, &revs->commits, NULL) < 0) {
                                if (!revs->ignore_missing_links)
                                        die("Failed to traverse parents of commit %s",
                                                oid_to_hex(&commit->object.oid));