Merge branch 'tb/incremental-midx-part-2' into ps/cat-file-filter-batch

* tb/incremental-midx-part-2:
  midx: implement writing incremental MIDX bitmaps
  pack-bitmap.c: use `ewah_or_iterator` for type bitmap iterators
  pack-bitmap.c: keep track of each layer's type bitmaps
  ewah: implement `struct ewah_or_iterator`
  pack-bitmap.c: apply pseudo-merge commits with incremental MIDXs
  pack-bitmap.c: compute disk-usage with incremental MIDXs
  pack-bitmap.c: teach `rev-list --test-bitmap` about incremental MIDXs
  pack-bitmap.c: support bitmap pack-reuse with incremental MIDXs
  pack-bitmap.c: teach `show_objects_for_type()` about incremental MIDXs
  pack-bitmap.c: teach `bitmap_for_commit()` about incremental MIDXs
  pack-bitmap.c: open and store incremental bitmap layers
  pack-revindex: prepare for incremental MIDX bitmaps
  Documentation: describe incremental MIDX bitmaps
  Documentation: remove a "future work" item from the MIDX docs

1 files changed, 3 insertions, 1 deletions

diff --git a/pack-bitmap.h b/pack-bitmap.h
index d7f4b8b8e9..dd0951088f 100644
--- a/pack-bitmap.h
+++ b/pack-bitmap.h
@@ -111,6 +111,7 @@ struct bitmap_writer {
 
 	kh_oid_map_t *bitmaps;
 	struct packing_data *to_pack;
+	struct multi_pack_index *midx; /* if appending to a MIDX chain */
 
 	struct bitmapped_commit *selected;
 	unsigned int selected_nr, selected_alloc;
@@ -125,7 +126,8 @@ struct bitmap_writer {
 };
 
 void bitmap_writer_init(struct bitmap_writer *writer, struct repository *r,
-			struct packing_data *pdata);
+			struct packing_data *pdata,
+			struct multi_pack_index *midx);
 void bitmap_writer_show_progress(struct bitmap_writer *writer, int show);
 void bitmap_writer_set_checksum(struct bitmap_writer *writer,
 				const unsigned char *sha1);