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pack-bitmap: implement object type filter

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The preceding commit has added a new object filter for git-rev-list(1)
which allows to filter objects by type. Implement the equivalent filter
for packfile bitmaps so that we can answer these queries fast.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2021-04-19 13:46:58 +02:00
committed by Junio C Hamano
parent b0c42a53c9
commit 7ab6aafa58
2 changed files with 50 additions and 4 deletions
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29
pack-bitmap.c
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@ -779,9 +779,6 @@ static void filter_bitmap_exclude_type(struct bitmap_index *bitmap_git,
eword_t mask;
uint32_t i;
if (type != OBJ_BLOB && type != OBJ_TREE)
BUG("filter_bitmap_exclude_type: unsupported type '%d'", type);
/*
* The non-bitmap version of this filter never removes
* objects which the other side specifically asked for,
@ -911,6 +908,24 @@ static void filter_bitmap_tree_depth(struct bitmap_index *bitmap_git,
OBJ_BLOB);
}
static void filter_bitmap_object_type(struct bitmap_index *bitmap_git,
struct object_list *tip_objects,
struct bitmap *to_filter,
enum object_type object_type)
{
if (object_type < OBJ_COMMIT || object_type > OBJ_TAG)
BUG("filter_bitmap_object_type given invalid object");
if (object_type != OBJ_TAG)
filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_TAG);
if (object_type != OBJ_COMMIT)
filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_COMMIT);
if (object_type != OBJ_TREE)
filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_TREE);
if (object_type != OBJ_BLOB)
filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter, OBJ_BLOB);
}
static int filter_bitmap(struct bitmap_index *bitmap_git,
struct object_list *tip_objects,
struct bitmap *to_filter,
@ -943,6 +958,14 @@ static int filter_bitmap(struct bitmap_index *bitmap_git,
return 0;
}
if (filter->choice == LOFC_OBJECT_TYPE) {
if (bitmap_git)
filter_bitmap_object_type(bitmap_git, tip_objects,
to_filter,
filter->object_type);
return 0;
}
/* filter choice not handled */
return -1;
}