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midx: compute paths via their source

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With the preceding commits we started to always have the object database
source available when we load, write or access multi-pack indices. With
this in place we can change how MIDX paths are computed so that we don't
have to pass in the combination of a hash algorithm and object directory
anymore, but only the object database source.

Refactor the code accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2025-08-11 15:46:50 +02:00
committed by Junio C Hamano
parent 7744936f37
commit 13296ac909
5 changed files with 62 additions and 75 deletions
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52
midx-write.c
View File

@@ -26,9 +26,9 @@
#define MIDX_CHUNK_LARGE_OFFSET_WIDTH (sizeof(uint64_t))
extern int midx_checksum_valid(struct multi_pack_index *m);
extern void clear_midx_files_ext(const char *object_dir, const char *ext,
extern void clear_midx_files_ext(struct odb_source *source, const char *ext,
const char *keep_hash);
extern void clear_incremental_midx_files_ext(const char *object_dir,
extern void clear_incremental_midx_files_ext(struct odb_source *source,
const char *ext,
const char **keep_hashes,
uint32_t hashes_nr);
@@ -112,6 +112,7 @@ struct write_midx_context {
struct string_list *to_include;
struct repository *repo;
struct odb_source *source;
};
static int should_include_pack(const struct write_midx_context *ctx,
@@ -648,7 +649,6 @@ static uint32_t *midx_pack_order(struct write_midx_context *ctx)
}
static void write_midx_reverse_index(struct write_midx_context *ctx,
const char *object_dir,
unsigned char *midx_hash)
{
struct strbuf buf = STRBUF_INIT;
@@ -657,11 +657,10 @@ static void write_midx_reverse_index(struct write_midx_context *ctx,
trace2_region_enter("midx", "write_midx_reverse_index", ctx->repo);
if (ctx->incremental)
get_split_midx_filename_ext(ctx->repo->hash_algo, &buf,
object_dir, midx_hash,
MIDX_EXT_REV);
get_split_midx_filename_ext(ctx->source, &buf,
midx_hash, MIDX_EXT_REV);
else
get_midx_filename_ext(ctx->repo->hash_algo, &buf, object_dir,
get_midx_filename_ext(ctx->source, &buf,
midx_hash, MIDX_EXT_REV);
tmp_file = write_rev_file_order(ctx->repo, NULL, ctx->pack_order,
@@ -836,7 +835,6 @@ static struct commit **find_commits_for_midx_bitmap(uint32_t *indexed_commits_nr
}
static int write_midx_bitmap(struct write_midx_context *ctx,
const char *object_dir,
const unsigned char *midx_hash,
struct packing_data *pdata,
struct commit **commits,
@@ -852,12 +850,11 @@ static int write_midx_bitmap(struct write_midx_context *ctx,
trace2_region_enter("midx", "write_midx_bitmap", ctx->repo);
if (ctx->incremental)
get_split_midx_filename_ext(ctx->repo->hash_algo, &bitmap_name,
object_dir, midx_hash,
MIDX_EXT_BITMAP);
get_split_midx_filename_ext(ctx->source, &bitmap_name,
midx_hash, MIDX_EXT_BITMAP);
else
get_midx_filename_ext(ctx->repo->hash_algo, &bitmap_name,
object_dir, midx_hash, MIDX_EXT_BITMAP);
get_midx_filename_ext(ctx->source, &bitmap_name,
midx_hash, MIDX_EXT_BITMAP);
if (flags & MIDX_WRITE_BITMAP_HASH_CACHE)
options |= BITMAP_OPT_HASH_CACHE;
@@ -981,11 +978,9 @@ static int link_midx_to_chain(struct multi_pack_index *m)
for (i = 0; i < ARRAY_SIZE(midx_exts); i++) {
const unsigned char *hash = get_midx_checksum(m);
get_midx_filename_ext(m->source->odb->repo->hash_algo, &from,
m->source->path,
get_midx_filename_ext(m->source, &from,
hash, midx_exts[i].non_split);
get_split_midx_filename_ext(m->source->odb->repo->hash_algo, &to,
m->source->path, hash,
get_split_midx_filename_ext(m->source, &to, hash,
midx_exts[i].split);
if (link(from.buf, to.buf) < 0 && errno != ENOENT) {
@@ -1023,16 +1018,16 @@ static void clear_midx_files(struct odb_source *source,
uint32_t i, j;
for (i = 0; i < ARRAY_SIZE(exts); i++) {
clear_incremental_midx_files_ext(source->path, exts[i],
clear_incremental_midx_files_ext(source, exts[i],
hashes, hashes_nr);
for (j = 0; j < hashes_nr; j++)
clear_midx_files_ext(source->path, exts[i], hashes[j]);
clear_midx_files_ext(source, exts[i], hashes[j]);
}
if (incremental)
get_midx_filename(source->odb->repo->hash_algo, &buf, source->path);
get_midx_filename(source, &buf);
else
get_midx_chain_filename(&buf, source->path);
get_midx_chain_filename(source, &buf);
if (unlink(buf.buf) && errno != ENOENT)
die_errno(_("failed to clear multi-pack-index at %s"), buf.buf);
@@ -1065,6 +1060,7 @@ static int write_midx_internal(struct odb_source *source,
trace2_region_enter("midx", "write_midx_internal", r);
ctx.repo = r;
ctx.source = source;
ctx.incremental = !!(flags & MIDX_WRITE_INCREMENTAL);
@@ -1073,7 +1069,7 @@ static int write_midx_internal(struct odb_source *source,
"%s/pack/multi-pack-index.d/tmp_midx_XXXXXX",
source->path);
else
get_midx_filename(r->hash_algo, &midx_name, source->path);
get_midx_filename(source, &midx_name);
if (safe_create_leading_directories(r, midx_name.buf))
die_errno(_("unable to create leading directories of %s"),
midx_name.buf);
@@ -1153,7 +1149,7 @@ static int write_midx_internal(struct odb_source *source,
* corresponding bitmap (or one wasn't requested).
*/
if (!want_bitmap)
clear_midx_files_ext(source->path, "bitmap", NULL);
clear_midx_files_ext(source, "bitmap", NULL);
goto cleanup;
}
}
@@ -1321,7 +1317,7 @@ static int write_midx_internal(struct odb_source *source,
if (ctx.incremental) {
struct strbuf lock_name = STRBUF_INIT;
get_midx_chain_filename(&lock_name, source->path);
get_midx_chain_filename(source, &lock_name);
hold_lock_file_for_update(&lk, lock_name.buf, LOCK_DIE_ON_ERROR);
strbuf_release(&lock_name);
@@ -1384,7 +1380,7 @@ static int write_midx_internal(struct odb_source *source,
if (flags & MIDX_WRITE_REV_INDEX &&
git_env_bool("GIT_TEST_MIDX_WRITE_REV", 0))
write_midx_reverse_index(&ctx, source->path, midx_hash);
write_midx_reverse_index(&ctx, midx_hash);
if (flags & MIDX_WRITE_BITMAP) {
struct packing_data pdata;
@@ -1407,7 +1403,7 @@ static int write_midx_internal(struct odb_source *source,
FREE_AND_NULL(ctx.entries);
ctx.entries_nr = 0;
if (write_midx_bitmap(&ctx, source->path,
if (write_midx_bitmap(&ctx,
midx_hash, &pdata, commits, commits_nr,
flags) < 0) {
error(_("could not write multi-pack bitmap"));
@@ -1440,8 +1436,8 @@ static int write_midx_internal(struct odb_source *source,
if (link_midx_to_chain(ctx.base_midx) < 0)
return -1;
get_split_midx_filename_ext(r->hash_algo, &final_midx_name,
source->path, midx_hash, MIDX_EXT_MIDX);
get_split_midx_filename_ext(source, &final_midx_name,
midx_hash, MIDX_EXT_MIDX);
if (rename_tempfile(&incr, final_midx_name.buf) < 0) {
error_errno(_("unable to rename new multi-pack-index layer"));

54
midx.c
View File

@@ -16,9 +16,9 @@
#define MIDX_PACK_ERROR ((void *)(intptr_t)-1)
int midx_checksum_valid(struct multi_pack_index *m);
void clear_midx_files_ext(const char *object_dir, const char *ext,
void clear_midx_files_ext(struct odb_source *source, const char *ext,
const char *keep_hash);
void clear_incremental_midx_files_ext(const char *object_dir, const char *ext,
void clear_incremental_midx_files_ext(struct odb_source *source, const char *ext,
char **keep_hashes,
uint32_t hashes_nr);
int cmp_idx_or_pack_name(const char *idx_or_pack_name,
@@ -29,19 +29,17 @@ const unsigned char *get_midx_checksum(struct multi_pack_index *m)
return m->data + m->data_len - m->source->odb->repo->hash_algo->rawsz;
}
void get_midx_filename(const struct git_hash_algo *hash_algo,
struct strbuf *out, const char *object_dir)
void get_midx_filename(struct odb_source *source, struct strbuf *out)
{
get_midx_filename_ext(hash_algo, out, object_dir, NULL, NULL);
get_midx_filename_ext(source, out, NULL, NULL);
}
void get_midx_filename_ext(const struct git_hash_algo *hash_algo,
struct strbuf *out, const char *object_dir,
void get_midx_filename_ext(struct odb_source *source, struct strbuf *out,
const unsigned char *hash, const char *ext)
{
strbuf_addf(out, "%s/pack/multi-pack-index", object_dir);
strbuf_addf(out, "%s/pack/multi-pack-index", source->path);
if (ext)
strbuf_addf(out, "-%s.%s", hash_to_hex_algop(hash, hash_algo), ext);
strbuf_addf(out, "-%s.%s", hash_to_hex_algop(hash, source->odb->repo->hash_algo), ext);
}
static int midx_read_oid_fanout(const unsigned char *chunk_start,
@@ -222,24 +220,23 @@ cleanup_fail:
return NULL;
}
void get_midx_chain_dirname(struct strbuf *buf, const char *object_dir)
void get_midx_chain_dirname(struct odb_source *source, struct strbuf *buf)
{
strbuf_addf(buf, "%s/pack/multi-pack-index.d", object_dir);
strbuf_addf(buf, "%s/pack/multi-pack-index.d", source->path);
}
void get_midx_chain_filename(struct strbuf *buf, const char *object_dir)
void get_midx_chain_filename(struct odb_source *source, struct strbuf *buf)
{
get_midx_chain_dirname(buf, object_dir);
get_midx_chain_dirname(source, buf);
strbuf_addstr(buf, "/multi-pack-index-chain");
}
void get_split_midx_filename_ext(const struct git_hash_algo *hash_algo,
struct strbuf *buf, const char *object_dir,
void get_split_midx_filename_ext(struct odb_source *source, struct strbuf *buf,
const unsigned char *hash, const char *ext)
{
get_midx_chain_dirname(buf, object_dir);
get_midx_chain_dirname(source, buf);
strbuf_addf(buf, "/multi-pack-index-%s.%s",
hash_to_hex_algop(hash, hash_algo), ext);
hash_to_hex_algop(hash, source->odb->repo->hash_algo), ext);
}
static int open_multi_pack_index_chain(const struct git_hash_algo *hash_algo,
@@ -326,7 +323,7 @@ static struct multi_pack_index *load_midx_chain_fd_st(struct odb_source *source,
valid = 0;
strbuf_reset(&buf);
get_split_midx_filename_ext(hash_algo, &buf, source->path,
get_split_midx_filename_ext(source, &buf,
layer.hash, MIDX_EXT_MIDX);
m = load_multi_pack_index_one(source, buf.buf);
@@ -358,7 +355,7 @@ static struct multi_pack_index *load_multi_pack_index_chain(struct odb_source *s
int fd;
struct multi_pack_index *m = NULL;
get_midx_chain_filename(&chain_file, source->path);
get_midx_chain_filename(source, &chain_file);
if (open_multi_pack_index_chain(source->odb->repo->hash_algo, chain_file.buf, &fd, &st)) {
int incomplete;
/* ownership of fd is taken over by load function */
@@ -374,8 +371,7 @@ struct multi_pack_index *load_multi_pack_index(struct odb_source *source)
struct strbuf midx_name = STRBUF_INIT;
struct multi_pack_index *m;
get_midx_filename(source->odb->repo->hash_algo, &midx_name,
source->path);
get_midx_filename(source, &midx_name);
m = load_multi_pack_index_one(source, midx_name.buf);
if (!m)
@@ -762,7 +758,7 @@ static void clear_midx_file_ext(const char *full_path, size_t full_path_len UNUS
die_errno(_("failed to remove %s"), full_path);
}
void clear_midx_files_ext(const char *object_dir, const char *ext,
void clear_midx_files_ext(struct odb_source *source, const char *ext,
const char *keep_hash)
{
struct clear_midx_data data;
@@ -776,7 +772,7 @@ void clear_midx_files_ext(const char *object_dir, const char *ext,
}
data.ext = ext;
for_each_file_in_pack_dir(object_dir,
for_each_file_in_pack_dir(source->path,
clear_midx_file_ext,
&data);
@@ -785,7 +781,7 @@ void clear_midx_files_ext(const char *object_dir, const char *ext,
free(data.keep);
}
void clear_incremental_midx_files_ext(const char *object_dir, const char *ext,
void clear_incremental_midx_files_ext(struct odb_source *source, const char *ext,
char **keep_hashes,
uint32_t hashes_nr)
{
@@ -801,7 +797,7 @@ void clear_incremental_midx_files_ext(const char *object_dir, const char *ext,
data.keep_nr = hashes_nr;
data.ext = ext;
for_each_file_in_pack_subdir(object_dir, "multi-pack-index.d",
for_each_file_in_pack_subdir(source->path, "multi-pack-index.d",
clear_midx_file_ext, &data);
for (i = 0; i < hashes_nr; i++)
@@ -813,7 +809,7 @@ void clear_midx_file(struct repository *r)
{
struct strbuf midx = STRBUF_INIT;
get_midx_filename(r->hash_algo, &midx, r->objects->sources->path);
get_midx_filename(r->objects->sources, &midx);
if (r->objects) {
struct odb_source *source;
@@ -828,8 +824,8 @@ void clear_midx_file(struct repository *r)
if (remove_path(midx.buf))
die(_("failed to clear multi-pack-index at %s"), midx.buf);
clear_midx_files_ext(r->objects->sources->path, MIDX_EXT_BITMAP, NULL);
clear_midx_files_ext(r->objects->sources->path, MIDX_EXT_REV, NULL);
clear_midx_files_ext(r->objects->sources, MIDX_EXT_BITMAP, NULL);
clear_midx_files_ext(r->objects->sources, MIDX_EXT_REV, NULL);
strbuf_release(&midx);
}
@@ -888,7 +884,7 @@ int verify_midx_file(struct odb_source *source, unsigned flags)
struct stat sb;
struct strbuf filename = STRBUF_INIT;
get_midx_filename(r->hash_algo, &filename, source->path);
get_midx_filename(source, &filename);
if (!stat(filename.buf, &sb)) {
error(_("multi-pack-index file exists, but failed to parse"));

13
midx.h
View File

@@ -86,15 +86,12 @@ struct multi_pack_index {
#define MIDX_EXT_MIDX "midx"
const unsigned char *get_midx_checksum(struct multi_pack_index *m);
void get_midx_filename(const struct git_hash_algo *hash_algo,
struct strbuf *out, const char *object_dir);
void get_midx_filename_ext(const struct git_hash_algo *hash_algo,
struct strbuf *out, const char *object_dir,
void get_midx_filename(struct odb_source *source, struct strbuf *out);
void get_midx_filename_ext(struct odb_source *source, struct strbuf *out,
const unsigned char *hash, const char *ext);
void get_midx_chain_dirname(struct strbuf *buf, const char *object_dir);
void get_midx_chain_filename(struct strbuf *buf, const char *object_dir);
void get_split_midx_filename_ext(const struct git_hash_algo *hash_algo,
struct strbuf *buf, const char *object_dir,
void get_midx_chain_dirname(struct odb_source *source, struct strbuf *out);
void get_midx_chain_filename(struct odb_source *source, struct strbuf *out);
void get_split_midx_filename_ext(struct odb_source *source, struct strbuf *buf,
const unsigned char *hash, const char *ext);
struct multi_pack_index *load_multi_pack_index(struct odb_source *source);

10
pack-bitmap.c
View File

@@ -418,13 +418,12 @@ char *midx_bitmap_filename(struct multi_pack_index *midx)
{
struct strbuf buf = STRBUF_INIT;
if (midx->has_chain)
get_split_midx_filename_ext(midx->source->odb->repo->hash_algo, &buf,
midx->source->path,
get_split_midx_filename_ext(midx->source, &buf,
get_midx_checksum(midx),
MIDX_EXT_BITMAP);
else
get_midx_filename_ext(midx->source->odb->repo->hash_algo, &buf,
midx->source->path, get_midx_checksum(midx),
get_midx_filename_ext(midx->source, &buf,
get_midx_checksum(midx),
MIDX_EXT_BITMAP);
return strbuf_detach(&buf, NULL);
@@ -463,8 +462,7 @@ static int open_midx_bitmap_1(struct bitmap_index *bitmap_git,
if (bitmap_git->pack || bitmap_git->midx) {
struct strbuf buf = STRBUF_INIT;
get_midx_filename(midx->source->odb->repo->hash_algo, &buf,
midx->source->path);
get_midx_filename(midx->source, &buf);
trace2_data_string("bitmap", bitmap_repo(bitmap_git),
"ignoring extra midx bitmap file", buf.buf);
close(fd);

8
pack-revindex.c
View File

@@ -389,12 +389,12 @@ int load_midx_revindex(struct multi_pack_index *m)
"source", "rev");
if (m->has_chain)
get_split_midx_filename_ext(m->source->odb->repo->hash_algo, &revindex_name,
m->source->path, get_midx_checksum(m),
get_split_midx_filename_ext(m->source, &revindex_name,
get_midx_checksum(m),
MIDX_EXT_REV);
else
get_midx_filename_ext(m->source->odb->repo->hash_algo, &revindex_name,
m->source->path, get_midx_checksum(m),
get_midx_filename_ext(m->source, &revindex_name,
get_midx_checksum(m),
MIDX_EXT_REV);
ret = load_revindex_from_disk(m->source->odb->repo->hash_algo,