revision.c: --full-history fix.

diff --git a/revision.c b/revision.c
index 7bff2a10b1044651a776b42d4ee3d91661830aa2..1cf6276ad8fdfa957bd7b3734494467c40e74962 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -31,17 +31,12 @@ static char *path_name(struct name_path *path, const char *name)
        return n;
 }
 
-struct object_list **add_object(struct object *obj,
-                                      struct object_list **p,
-                                      struct name_path *path,
-                                      const char *name)
+void add_object(struct object *obj,
+               struct object_array *p,
+               struct name_path *path,
+               const char *name)
 {
-       struct object_list *entry = xmalloc(sizeof(*entry));
-       entry->item = obj;
-       entry->next = *p;
-       entry->name = path_name(path, name);
-       *p = entry;
-       return &entry->next;
+       add_object_array(obj, path_name(path, name), p);
 }
 
 static void mark_blob_uninteresting(struct blob *blob)
@@ -117,9 +112,9 @@ void mark_parents_uninteresting(struct commit *commit)
        }
 }
 
-static void add_pending_object(struct rev_info *revs, struct object *obj, const char *name)
+void add_pending_object(struct rev_info *revs, struct object *obj, const char *name)
 {
-       add_object(obj, &revs->pending_objects, NULL, name);
+       add_object_array(obj, name, &revs->pending);
 }
 
 static struct object *get_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
@@ -285,7 +280,7 @@ int rev_same_tree_as_empty(struct rev_info *revs, struct tree *t1)
 static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
 {
        struct commit_list **pp, *parent;
-       int tree_changed = 0;
+       int tree_changed = 0, tree_same = 0;
 
        if (!commit->tree)
                return;
@@ -303,6 +298,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                parse_commit(p);
                switch (rev_compare_tree(revs, p->tree, commit->tree)) {
                case REV_TREE_SAME:
+                       tree_same = 1;
                        if (!revs->simplify_history || (p->object.flags & UNINTERESTING)) {
                                /* Even if a merge with an uninteresting
                                 * side branch brought the entire change
@@ -339,7 +335,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
                }
                die("bad tree compare for commit %s", sha1_to_hex(commit->object.sha1));
        }
-       if (tree_changed)
+       if (tree_changed && !tree_same)
                commit->object.flags |= TREECHANGE;
 }
 
@@ -836,7 +832,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                object = get_reference(revs, arg, sha1, flags ^ local_flags);
                add_pending_object(revs, object, arg);
        }
-       if (def && !revs->pending_objects) {
+       if (def && !revs->pending.nr) {
                unsigned char sha1[20];
                struct object *object;
                if (get_sha1(def, sha1))
@@ -868,11 +864,13 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
 
 void prepare_revision_walk(struct rev_info *revs)
 {
-       struct object_list *list;
+       int nr = revs->pending.nr;
+       struct object_array_entry *list = revs->pending.objects;
 
-       list = revs->pending_objects;
-       revs->pending_objects = NULL;
-       while (list) {
+       revs->pending.nr = 0;
+       revs->pending.alloc = 0;
+       revs->pending.objects = NULL;
+       while (--nr >= 0) {
                struct commit *commit = handle_commit(revs, list->item, list->name);
                if (commit) {
                        if (!(commit->object.flags & SEEN)) {
@@ -880,7 +878,7 @@ void prepare_revision_walk(struct rev_info *revs)
                                insert_by_date(commit, &revs->commits);
                        }
                }
-               list = list->next;
+               list++;
        }
 
        if (revs->no_walk)
@@ -899,6 +897,8 @@ static int rewrite_one(struct rev_info *revs, struct commit **pp)
                struct commit *p = *pp;
                if (!revs->limited)
                        add_parents_to_list(revs, p, &revs->commits);
+               if (p->parents && p->parents->next)
+                       return 0;
                if (p->object.flags & (TREECHANGE | UNINTERESTING))
                        return 0;
                if (!p->parents)
@@ -991,8 +991,15 @@ struct commit *get_revision(struct rev_info *revs)
                    commit->parents && commit->parents->next)
                        continue;
                if (revs->prune_fn && revs->dense) {
-                       if (!(commit->object.flags & TREECHANGE))
-                               continue;
+                       /* Commit without changes? */
+                       if (!(commit->object.flags & TREECHANGE)) {
+                               /* drop merges unless we want parenthood */
+                               if (!revs->parents)
+                                       continue;
+                               /* non-merge - always ignore it */
+                               if (commit->parents && !commit->parents->next)
+                                       continue;
+                       }
                        if (revs->parents)
                                rewrite_parents(revs, commit);
                }