@matheusbsbs / matheus-bagliano / commits / 83296d20e8

pack-bitmap: return multiple packs via `reuse_partial_packfile_from_bitmap()`

Further prepare for enabling verbatim pack-reuse over multiple packfiles by changing the signature of reuse_partial_packfile_from_bitmap() to populate an array of `struct bitmapped_pack *`'s instead of a pointer to a single packfile. Since the array we're filling out is sized dynamically[^1], add an additional `size_t *` parameter which will hold the number of reusable packs (equal to the number of elements in the array). Note that since we still have not implemented true multi-pack reuse, these changes aren't propagated out to the rest of the caller in builtin/pack-objects.c. In the interim state, we expect that the array has a single element, and we use that element to fill out the static `reuse_packfile` variable (which is a bog-standard `struct packed_git *`). Future commits will continue to push this change further out through the pack-objects code. [^1]: That is, even though we know the number of packs which are candidates for pack-reuse, we do not know how many of those candidates we can actually reuse. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Taylor Blau committed Dec 14, 2023 at 17:24 UTC 83296d20e84e248ea539fe1332fca2139cfcfb8b
3 files changed +14 -6
builtin/pack-objects.c
+7 -2
index c3df6d9657..87e16636a8 100644 --- a/builtin/pack-objects.c +++ b/builtin/pack-objects.c @@ -3940,14 +3940,19 @@ static int pack_options_allow_reuse(void) static int get_object_list_from_bitmap(struct rev_info *revs) { + struct bitmapped_pack *packs = NULL; + size_t packs_nr = 0; + if (!(bitmap_git = prepare_bitmap_walk(revs, 0))) return -1; if (pack_options_allow_reuse()) - reuse_partial_packfile_from_bitmap(bitmap_git, &reuse_packfile, + reuse_partial_packfile_from_bitmap(bitmap_git, &packs, + &packs_nr, &reuse_packfile_bitmap); - if (reuse_packfile) { + if (packs) { + reuse_packfile = packs[0].p; reuse_packfile_objects = bitmap_popcount(reuse_packfile_bitmap); if (!reuse_packfile_objects) BUG("expected non-empty reuse bitmap");
pack-bitmap.c
+4 -2
index c75a83e9cc..4d5a484678 100644 --- a/pack-bitmap.c +++ b/pack-bitmap.c @@ -2001,7 +2001,8 @@ static int bitmapped_pack_cmp(const void *va, const void *vb) } void reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git, - struct packed_git **packfile_out, + struct bitmapped_pack **packs_out, + size_t *packs_nr_out, struct bitmap **reuse_out) { struct repository *r = the_repository; @@ -2069,7 +2070,8 @@ void reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git, * need to be handled separately. */ bitmap_and_not(result, reuse); - *packfile_out = packs[0].p; + *packs_out = packs; + *packs_nr_out = packs_nr; *reuse_out = reuse; }
pack-bitmap.h
+3 -2
index ab3fdcde6b..7a12a2ce81 100644 --- a/pack-bitmap.h +++ b/pack-bitmap.h @@ -78,8 +78,9 @@ int test_bitmap_hashes(struct repository *r); struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs, int filter_provided_objects); uint32_t midx_preferred_pack(struct bitmap_index *bitmap_git); -void reuse_partial_packfile_from_bitmap(struct bitmap_index *, - struct packed_git **packfile, +void reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git, + struct bitmapped_pack **packs_out, + size_t *packs_nr_out, struct bitmap **reuse_out); int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping, kh_oid_map_t *reused_bitmaps, int show_progress);