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pack-revindex: make `load_pack_revindex` take a repository 

In a future commit, we will introduce a `pack.readReverseIndex`
configuration, which forces Git to generate the reverse index from
scratch instead of loading it from disk.

In order to avoid reading this configuration value more than once, we'll
use the `repo_settings` struct to lazily load this value.

In order to access the `struct repo_settings`, add a repository argument
to `load_pack_revindex`, and update all callers to pass the correct
instance (in all cases, `the_repository`).

In certain instances, a new function-local variable is introduced to
take the place of a `struct repository *` argument to the function
itself to avoid propagating the new parameter even further throughout
the tree.

Co-authored-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau 2023-04-12 18:20:24 -04:00 committed by Junio C Hamano
parent b77919ed6e
commit 65308ad8f7
4 changed files with 18 additions and 14 deletions
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23
pack-bitmap.c
View File

@ -463,7 +463,7 @@ static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git
return 0;
}
static int load_reverse_index(struct bitmap_index *bitmap_git)
static int load_reverse_index(struct repository *r, struct bitmap_index *bitmap_git)
{
if (bitmap_is_midx(bitmap_git)) {
uint32_t i;
@ -477,23 +477,23 @@ static int load_reverse_index(struct bitmap_index *bitmap_git)
* since we will need to make use of them in pack-objects.
*/
for (i = 0; i < bitmap_git->midx->num_packs; i++) {
ret = load_pack_revindex(bitmap_git->midx->packs[i]);
ret = load_pack_revindex(r, bitmap_git->midx->packs[i]);
if (ret)
return ret;
}
return 0;
}
return load_pack_revindex(bitmap_git->pack);
return load_pack_revindex(r, bitmap_git->pack);
}
static int load_bitmap(struct bitmap_index *bitmap_git)
static int load_bitmap(struct repository *r, struct bitmap_index *bitmap_git)
{
assert(bitmap_git->map);
bitmap_git->bitmaps = kh_init_oid_map();
bitmap_git->ext_index.positions = kh_init_oid_pos();
if (load_reverse_index(bitmap_git))
if (load_reverse_index(r, bitmap_git))
goto failed;
if (!(bitmap_git->commits = read_bitmap_1(bitmap_git)) ||
@ -580,7 +580,7 @@ struct bitmap_index *prepare_bitmap_git(struct repository *r)
{
struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git));
if (!open_bitmap(r, bitmap_git) && !load_bitmap(bitmap_git))
if (!open_bitmap(r, bitmap_git) && !load_bitmap(r, bitmap_git))
return bitmap_git;
free_bitmap_index(bitmap_git);
@ -589,9 +589,10 @@ struct bitmap_index *prepare_bitmap_git(struct repository *r)
struct bitmap_index *prepare_midx_bitmap_git(struct multi_pack_index *midx)
{
struct repository *r = the_repository;
struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git));
if (!open_midx_bitmap_1(bitmap_git, midx) && !load_bitmap(bitmap_git))
if (!open_midx_bitmap_1(bitmap_git, midx) && !load_bitmap(r, bitmap_git))
return bitmap_git;
free_bitmap_index(bitmap_git);
@ -1592,7 +1593,7 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
* from disk. this is the point of no return; after this the rev_list
* becomes invalidated and we must perform the revwalk through bitmaps
*/
if (load_bitmap(bitmap_git) < 0)
if (load_bitmap(revs->repo, bitmap_git) < 0)
goto cleanup;
object_array_clear(&revs->pending);
@ -1742,6 +1743,7 @@ int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
uint32_t *entries,
struct bitmap **reuse_out)
{
struct repository *r = the_repository;
struct packed_git *pack;
struct bitmap *result = bitmap_git->result;
struct bitmap *reuse;
@ -1752,7 +1754,7 @@ int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
assert(result);
load_reverse_index(bitmap_git);
load_reverse_index(r, bitmap_git);
if (bitmap_is_midx(bitmap_git))
pack = bitmap_git->midx->packs[midx_preferred_pack(bitmap_git)];
@ -2132,11 +2134,12 @@ int rebuild_bitmap(const uint32_t *reposition,
uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git,
struct packing_data *mapping)
{
struct repository *r = the_repository;
uint32_t i, num_objects;
uint32_t *reposition;
if (!bitmap_is_midx(bitmap_git))
load_reverse_index(bitmap_git);
load_reverse_index(r, bitmap_git);
else if (load_midx_revindex(bitmap_git->midx) < 0)
BUG("rebuild_existing_bitmaps: missing required rev-cache "
"extension");

4
pack-revindex.c
View File

@ -283,7 +283,7 @@ static int load_pack_revindex_from_disk(struct packed_git *p)
return ret;
}
int load_pack_revindex(struct packed_git *p)
int load_pack_revindex(struct repository *r, struct packed_git *p)
{
if (p->revindex || p->revindex_data)
return 0;
@ -356,7 +356,7 @@ int offset_to_pack_pos(struct packed_git *p, off_t ofs, uint32_t *pos)
{
unsigned lo, hi;
if (load_pack_revindex(p) < 0)
if (load_pack_revindex(the_repository, p) < 0)
return -1;
lo = 0;

3
pack-revindex.h
View File

@ -39,6 +39,7 @@
struct packed_git;
struct multi_pack_index;
struct repository;
/*
* load_pack_revindex populates the revindex's internal data-structures for the
@ -47,7 +48,7 @@ struct multi_pack_index;
* If a '.rev' file is present it is mmap'd, and pointers are assigned into it
* (instead of using the in-memory variant).
*/
int load_pack_revindex(struct packed_git *p);
int load_pack_revindex(struct repository *r, struct packed_git *p);
/*
* load_midx_revindex loads the '.rev' file corresponding to the given

2
packfile.c
View File

@ -2151,7 +2151,7 @@ int for_each_object_in_pack(struct packed_git *p,
int r = 0;
if (flags & FOR_EACH_OBJECT_PACK_ORDER) {
if (load_pack_revindex(p))
if (load_pack_revindex(the_repository, p))
return -1;
}