diff --git a/Documentation/git-multi-pack-index.txt b/Documentation/git-multi-pack-index.txt index 3696506eb3..631d5c7d15 100644 --- a/Documentation/git-multi-pack-index.txt +++ b/Documentation/git-multi-pack-index.txt @@ -64,6 +64,12 @@ The file given at `` is expected to be readable, and can contain duplicates. (If a given OID is given more than once, it is marked as preferred if at least one instance of it begins with the special `+` marker). + + --incremental:: + Write an incremental MIDX file containing only objects + and packs not present in an existing MIDX layer. + Migrates non-incremental MIDXs to incremental ones when + necessary. Incompatible with `--bitmap`. -- verify:: @@ -74,6 +80,8 @@ expire:: have no objects referenced by the MIDX (with the exception of `.keep` packs and cruft packs). Rewrite the MIDX file afterward to remove all references to these pack-files. ++ +NOTE: this mode is incompatible with incremental MIDX files. repack:: Create a new pack-file containing objects in small pack-files @@ -95,7 +103,8 @@ repack:: + If `repack.packKeptObjects` is `false`, then any pack-files with an associated `.keep` file will not be selected for the batch to repack. - ++ +NOTE: this mode is incompatible with incremental MIDX files. EXAMPLES -------- diff --git a/Documentation/technical/multi-pack-index.txt b/Documentation/technical/multi-pack-index.txt index f2221d2b44..cc063b30be 100644 --- a/Documentation/technical/multi-pack-index.txt +++ b/Documentation/technical/multi-pack-index.txt @@ -61,6 +61,109 @@ Design Details - The MIDX file format uses a chunk-based approach (similar to the commit-graph file) that allows optional data to be added. +Incremental multi-pack indexes +------------------------------ + +As repositories grow in size, it becomes more expensive to write a +multi-pack index (MIDX) that includes all packfiles. To accommodate +this, the "incremental multi-pack indexes" feature allows for combining +a "chain" of multi-pack indexes. + +Each individual component of the chain need only contain a small number +of packfiles. Appending to the chain does not invalidate earlier parts +of the chain, so repositories can control how much time is spent +updating the MIDX chain by determining the number of packs in each layer +of the MIDX chain. + +=== Design state + +At present, the incremental multi-pack indexes feature is missing two +important components: + + - The ability to rewrite earlier portions of the MIDX chain (i.e., to + "compact" some collection of adjacent MIDX layers into a single + MIDX). At present the only supported way of shrinking a MIDX chain + is to rewrite the entire chain from scratch without the `--split` + flag. ++ +There are no fundamental limitations that stand in the way of being able +to implement this feature. It is omitted from the initial implementation +in order to reduce the complexity, but will be added later. + + - Support for reachability bitmaps. The classic single MIDX + implementation does support reachability bitmaps (see the section + titled "multi-pack-index reverse indexes" in + linkgit:gitformat-pack[5] for more details). ++ +As above, there are no fundamental limitations that stand in the way of +extending the incremental MIDX format to support reachability bitmaps. +The design below specifically takes this into account, and support for +reachability bitmaps will be added in a future patch series. It is +omitted from the current implementation for the same reason as above. ++ +In brief, to support reachability bitmaps with the incremental MIDX +feature, the concept of the pseudo-pack order is extended across each +layer of the incremental MIDX chain to form a concatenated pseudo-pack +order. This concatenation takes place in the same order as the chain +itself (in other words, the concatenated pseudo-pack order for a chain +`{$H1, $H2, $H3}` would be the pseudo-pack order for `$H1`, followed by +the pseudo-pack order for `$H2`, followed by the pseudo-pack order for +`$H3`). ++ +The layout will then be extended so that each layer of the incremental +MIDX chain can write a `*.bitmap`. The objects in each layer's bitmap +are offset by the number of objects in the previous layers of the chain. + +=== File layout + +Instead of storing a single `multi-pack-index` file (with an optional +`.rev` and `.bitmap` extension) in `$GIT_DIR/objects/pack`, incremental +MIDXs are stored in the following layout: + +---- +$GIT_DIR/objects/pack/multi-pack-index.d/ +$GIT_DIR/objects/pack/multi-pack-index.d/multi-pack-index-chain +$GIT_DIR/objects/pack/multi-pack-index.d/multi-pack-index-$H1.midx +$GIT_DIR/objects/pack/multi-pack-index.d/multi-pack-index-$H2.midx +$GIT_DIR/objects/pack/multi-pack-index.d/multi-pack-index-$H3.midx +---- + +The `multi-pack-index-chain` file contains a list of the incremental +MIDX files in the chain, in order. The above example shows a chain whose +`multi-pack-index-chain` file would contain the following lines: + +---- +$H1 +$H2 +$H3 +---- + +The `multi-pack-index-$H1.midx` file contains the first layer of the +multi-pack-index chain. The `multi-pack-index-$H2.midx` file contains +the second layer of the chain, and so on. + +When both an incremental- and non-incremental MIDX are present, the +non-incremental MIDX is always read first. + +=== Object positions for incremental MIDXs + +In the original multi-pack-index design, we refer to objects via their +lexicographic position (by object IDs) within the repository's singular +multi-pack-index. In the incremental multi-pack-index design, we refer +to objects via their index into a concatenated lexicographic ordering +among each component in the MIDX chain. + +If `objects_nr()` is a function that returns the number of objects in a +given MIDX layer, then the index of an object at lexicographic position +`i` within, say, $H3 is defined as: + +---- +objects_nr($H2) + objects_nr($H1) + i +---- + +(in the C implementation, this is often computed as `i + +m->num_objects_in_base`). + Future Work ----------- diff --git a/builtin/multi-pack-index.c b/builtin/multi-pack-index.c index 9cf1a32d65..8805cbbeb3 100644 --- a/builtin/multi-pack-index.c +++ b/builtin/multi-pack-index.c @@ -129,6 +129,8 @@ static int cmd_multi_pack_index_write(int argc, const char **argv, MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX), OPT_BIT(0, "progress", &opts.flags, N_("force progress reporting"), MIDX_PROGRESS), + OPT_BIT(0, "incremental", &opts.flags, + N_("write a new incremental MIDX"), MIDX_WRITE_INCREMENTAL), OPT_BOOL(0, "stdin-packs", &opts.stdin_packs, N_("write multi-pack index containing only given indexes")), OPT_FILENAME(0, "refs-snapshot", &opts.refs_snapshot, diff --git a/builtin/repack.c b/builtin/repack.c index d9ea6cecbf..62cfa50c50 100644 --- a/builtin/repack.c +++ b/builtin/repack.c @@ -1218,10 +1218,6 @@ int cmd_repack(int argc, const char **argv, const char *prefix) if (!write_midx && (!(pack_everything & ALL_INTO_ONE) || !is_bare_repository())) write_bitmaps = 0; - } else if (write_bitmaps && - git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0) && - git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP, 0)) { - write_bitmaps = 0; } if (pack_kept_objects < 0) pack_kept_objects = write_bitmaps > 0 && !write_midx; @@ -1521,8 +1517,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix) if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0)) { unsigned flags = 0; - if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP, 0)) - flags |= MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX; + if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL, 0)) + flags |= MIDX_WRITE_INCREMENTAL; write_midx_file(get_object_directory(), NULL, NULL, flags); } diff --git a/ci/run-build-and-tests.sh b/ci/run-build-and-tests.sh index 98dda42045..2e28d02b20 100755 --- a/ci/run-build-and-tests.sh +++ b/ci/run-build-and-tests.sh @@ -25,7 +25,7 @@ linux-TEST-vars) export GIT_TEST_COMMIT_GRAPH=1 export GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=1 export GIT_TEST_MULTI_PACK_INDEX=1 - export GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=1 + export GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=1 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master export GIT_TEST_NO_WRITE_REV_INDEX=1 export GIT_TEST_CHECKOUT_WORKERS=2 diff --git a/midx-write.c b/midx-write.c index 99c3110a43..e3fa33203f 100644 --- a/midx-write.c +++ b/midx-write.c @@ -17,6 +17,8 @@ #include "refs.h" #include "revision.h" #include "list-objects.h" +#include "path.h" +#include "pack-revindex.h" #define PACK_EXPIRED UINT_MAX #define BITMAP_POS_UNKNOWN (~((uint32_t)0)) @@ -25,7 +27,11 @@ extern int midx_checksum_valid(struct multi_pack_index *m); extern void clear_midx_files_ext(const char *object_dir, const char *ext, - unsigned char *keep_hash); + const char *keep_hash); +extern void clear_incremental_midx_files_ext(const char *object_dir, + const char *ext, + const char **keep_hashes, + uint32_t hashes_nr); extern int cmp_idx_or_pack_name(const char *idx_or_pack_name, const char *idx_name); @@ -86,6 +92,7 @@ struct write_midx_context { size_t nr; size_t alloc; struct multi_pack_index *m; + struct multi_pack_index *base_midx; struct progress *progress; unsigned pack_paths_checked; @@ -99,6 +106,9 @@ struct write_midx_context { int preferred_pack_idx; + int incremental; + uint32_t num_multi_pack_indexes_before; + struct string_list *to_include; }; @@ -122,6 +132,9 @@ static int should_include_pack(const struct write_midx_context *ctx, */ if (ctx->m && midx_contains_pack(ctx->m, file_name)) return 0; + else if (ctx->base_midx && midx_contains_pack(ctx->base_midx, + file_name)) + return 0; else if (ctx->to_include && !string_list_has_string(ctx->to_include, file_name)) return 0; @@ -196,7 +209,7 @@ static int nth_midxed_pack_midx_entry(struct multi_pack_index *m, struct pack_midx_entry *e, uint32_t pos) { - if (pos >= m->num_objects) + if (pos >= m->num_objects + m->num_objects_in_base) return 1; nth_midxed_object_oid(&e->oid, m, pos); @@ -247,12 +260,16 @@ static void midx_fanout_add_midx_fanout(struct midx_fanout *fanout, uint32_t cur_fanout, int preferred_pack) { - uint32_t start = 0, end; + uint32_t start = m->num_objects_in_base, end; uint32_t cur_object; + if (m->base_midx) + midx_fanout_add_midx_fanout(fanout, m->base_midx, cur_fanout, + preferred_pack); + if (cur_fanout) - start = ntohl(m->chunk_oid_fanout[cur_fanout - 1]); - end = ntohl(m->chunk_oid_fanout[cur_fanout]); + start += ntohl(m->chunk_oid_fanout[cur_fanout - 1]); + end = m->num_objects_in_base + ntohl(m->chunk_oid_fanout[cur_fanout]); for (cur_object = start; cur_object < end; cur_object++) { if ((preferred_pack > -1) && @@ -334,7 +351,7 @@ static void compute_sorted_entries(struct write_midx_context *ctx, for (cur_fanout = 0; cur_fanout < 256; cur_fanout++) { fanout.nr = 0; - if (ctx->m) + if (ctx->m && !ctx->incremental) midx_fanout_add_midx_fanout(&fanout, ctx->m, cur_fanout, ctx->preferred_pack_idx); @@ -360,6 +377,10 @@ static void compute_sorted_entries(struct write_midx_context *ctx, if (cur_object && oideq(&fanout.entries[cur_object - 1].oid, &fanout.entries[cur_object].oid)) continue; + if (ctx->incremental && ctx->base_midx && + midx_has_oid(ctx->base_midx, + &fanout.entries[cur_object].oid)) + continue; ALLOC_GROW(ctx->entries, st_add(ctx->entries_nr, 1), alloc_objects); @@ -543,10 +564,16 @@ static int write_midx_revindex(struct hashfile *f, void *data) { struct write_midx_context *ctx = data; - uint32_t i; + uint32_t i, nr_base; + + if (ctx->incremental && ctx->base_midx) + nr_base = ctx->base_midx->num_objects + + ctx->base_midx->num_objects_in_base; + else + nr_base = 0; for (i = 0; i < ctx->entries_nr; i++) - hashwrite_be32(f, ctx->pack_order[i]); + hashwrite_be32(f, ctx->pack_order[i] + nr_base); return 0; } @@ -575,12 +602,18 @@ static int midx_pack_order_cmp(const void *va, const void *vb) static uint32_t *midx_pack_order(struct write_midx_context *ctx) { struct midx_pack_order_data *data; - uint32_t *pack_order; + uint32_t *pack_order, base_objects = 0; uint32_t i; trace2_region_enter("midx", "midx_pack_order", the_repository); + if (ctx->incremental && ctx->base_midx) + base_objects = ctx->base_midx->num_objects + + ctx->base_midx->num_objects_in_base; + + ALLOC_ARRAY(pack_order, ctx->entries_nr); ALLOC_ARRAY(data, ctx->entries_nr); + for (i = 0; i < ctx->entries_nr; i++) { struct pack_midx_entry *e = &ctx->entries[i]; data[i].nr = i; @@ -592,12 +625,11 @@ static uint32_t *midx_pack_order(struct write_midx_context *ctx) QSORT(data, ctx->entries_nr, midx_pack_order_cmp); - ALLOC_ARRAY(pack_order, ctx->entries_nr); for (i = 0; i < ctx->entries_nr; i++) { struct pack_midx_entry *e = &ctx->entries[data[i].nr]; struct pack_info *pack = &ctx->info[ctx->pack_perm[e->pack_int_id]]; if (pack->bitmap_pos == BITMAP_POS_UNKNOWN) - pack->bitmap_pos = i; + pack->bitmap_pos = i + base_objects; pack->bitmap_nr++; pack_order[i] = data[i].nr; } @@ -645,7 +677,8 @@ static void prepare_midx_packing_data(struct packing_data *pdata, prepare_packing_data(the_repository, pdata); for (i = 0; i < ctx->entries_nr; i++) { - struct pack_midx_entry *from = &ctx->entries[ctx->pack_order[i]]; + uint32_t pos = ctx->pack_order[i]; + struct pack_midx_entry *from = &ctx->entries[pos]; struct object_entry *to = packlist_alloc(pdata, &from->oid); oe_set_in_pack(pdata, to, @@ -893,35 +926,128 @@ cleanup: static int fill_packs_from_midx(struct write_midx_context *ctx, const char *preferred_pack_name, uint32_t flags) { - uint32_t i; + struct multi_pack_index *m; - for (i = 0; i < ctx->m->num_packs; i++) { - ALLOC_GROW(ctx->info, ctx->nr + 1, ctx->alloc); + for (m = ctx->m; m; m = m->base_midx) { + uint32_t i; + + for (i = 0; i < m->num_packs; i++) { + ALLOC_GROW(ctx->info, ctx->nr + 1, ctx->alloc); - if (flags & MIDX_WRITE_REV_INDEX || preferred_pack_name) { /* * If generating a reverse index, need to have * packed_git's loaded to compare their * mtimes and object count. * - * * If a preferred pack is specified, need to * have packed_git's loaded to ensure the chosen * preferred pack has a non-zero object count. */ - if (prepare_midx_pack(the_repository, ctx->m, i)) - return error(_("could not load pack")); + if (flags & MIDX_WRITE_REV_INDEX || + preferred_pack_name) { + if (prepare_midx_pack(the_repository, m, + m->num_packs_in_base + i)) { + error(_("could not load pack")); + return 1; + } - if (open_pack_index(ctx->m->packs[i])) - die(_("could not open index for %s"), - ctx->m->packs[i]->pack_name); + if (open_pack_index(m->packs[i])) + die(_("could not open index for %s"), + m->packs[i]->pack_name); + } + + fill_pack_info(&ctx->info[ctx->nr++], m->packs[i], + m->pack_names[i], + m->num_packs_in_base + i); } + } + return 0; +} - fill_pack_info(&ctx->info[ctx->nr++], ctx->m->packs[i], - ctx->m->pack_names[i], i); +static struct { + const char *non_split; + const char *split; +} midx_exts[] = { + {NULL, MIDX_EXT_MIDX}, + {MIDX_EXT_BITMAP, MIDX_EXT_BITMAP}, + {MIDX_EXT_REV, MIDX_EXT_REV}, +}; + +static int link_midx_to_chain(struct multi_pack_index *m) +{ + struct strbuf from = STRBUF_INIT; + struct strbuf to = STRBUF_INIT; + int ret = 0; + size_t i; + + if (!m || m->has_chain) { + /* + * Either no MIDX previously existed, or it was already + * part of a MIDX chain. In both cases, we have nothing + * to link, so return early. + */ + goto done; } - return 0; + for (i = 0; i < ARRAY_SIZE(midx_exts); i++) { + const unsigned char *hash = get_midx_checksum(m); + + get_midx_filename_ext(&from, m->object_dir, hash, + midx_exts[i].non_split); + get_split_midx_filename_ext(&to, m->object_dir, hash, + midx_exts[i].split); + + if (link(from.buf, to.buf) < 0 && errno != ENOENT) { + ret = error_errno(_("unable to link '%s' to '%s'"), + from.buf, to.buf); + goto done; + } + + strbuf_reset(&from); + strbuf_reset(&to); + } + +done: + strbuf_release(&from); + strbuf_release(&to); + return ret; +} + +static void clear_midx_files(const char *object_dir, + const char **hashes, + uint32_t hashes_nr, + unsigned incremental) +{ + /* + * if incremental: + * - remove all non-incremental MIDX files + * - remove any incremental MIDX files not in the current one + * + * if non-incremental: + * - remove all incremental MIDX files + * - remove any non-incremental MIDX files not matching the current + * hash + */ + struct strbuf buf = STRBUF_INIT; + const char *exts[] = { MIDX_EXT_BITMAP, MIDX_EXT_REV, MIDX_EXT_MIDX }; + uint32_t i, j; + + for (i = 0; i < ARRAY_SIZE(exts); i++) { + clear_incremental_midx_files_ext(object_dir, exts[i], + hashes, hashes_nr); + for (j = 0; j < hashes_nr; j++) + clear_midx_files_ext(object_dir, exts[i], hashes[j]); + } + + if (incremental) + get_midx_filename(&buf, object_dir); + else + get_midx_chain_filename(&buf, object_dir); + + if (unlink(buf.buf) && errno != ENOENT) + die_errno(_("failed to clear multi-pack-index at %s"), buf.buf); + + strbuf_release(&buf); } static int write_midx_internal(const char *object_dir, @@ -936,42 +1062,66 @@ static int write_midx_internal(const char *object_dir, uint32_t i, start_pack; struct hashfile *f = NULL; struct lock_file lk; + struct tempfile *incr; struct write_midx_context ctx = { 0 }; int bitmapped_packs_concat_len = 0; int pack_name_concat_len = 0; int dropped_packs = 0; int result = 0; + const char **keep_hashes = NULL; struct chunkfile *cf; trace2_region_enter("midx", "write_midx_internal", the_repository); - get_midx_filename(&midx_name, object_dir); + ctx.incremental = !!(flags & MIDX_WRITE_INCREMENTAL); + if (ctx.incremental && (flags & MIDX_WRITE_BITMAP)) + die(_("cannot write incremental MIDX with bitmap")); + + if (ctx.incremental) + strbuf_addf(&midx_name, + "%s/pack/multi-pack-index.d/tmp_midx_XXXXXX", + object_dir); + else + get_midx_filename(&midx_name, object_dir); if (safe_create_leading_directories(midx_name.buf)) die_errno(_("unable to create leading directories of %s"), midx_name.buf); - if (!packs_to_include) { - /* - * Only reference an existing MIDX when not filtering which - * packs to include, since all packs and objects are copied - * blindly from an existing MIDX if one is present. - */ - ctx.m = lookup_multi_pack_index(the_repository, object_dir); - } + if (!packs_to_include || ctx.incremental) { + struct multi_pack_index *m = lookup_multi_pack_index(the_repository, + object_dir); + if (m && !midx_checksum_valid(m)) { + warning(_("ignoring existing multi-pack-index; checksum mismatch")); + m = NULL; + } - if (ctx.m && !midx_checksum_valid(ctx.m)) { - warning(_("ignoring existing multi-pack-index; checksum mismatch")); - ctx.m = NULL; + if (m) { + /* + * Only reference an existing MIDX when not filtering + * which packs to include, since all packs and objects + * are copied blindly from an existing MIDX if one is + * present. + */ + if (ctx.incremental) + ctx.base_midx = m; + else if (!packs_to_include) + ctx.m = m; + } } ctx.nr = 0; - ctx.alloc = ctx.m ? ctx.m->num_packs : 16; + ctx.alloc = ctx.m ? ctx.m->num_packs + ctx.m->num_packs_in_base : 16; ctx.info = NULL; ALLOC_ARRAY(ctx.info, ctx.alloc); - if (ctx.m && fill_packs_from_midx(&ctx, preferred_pack_name, - flags) < 0) { - result = 1; + if (ctx.incremental) { + struct multi_pack_index *m = ctx.base_midx; + while (m) { + ctx.num_multi_pack_indexes_before++; + m = m->base_midx; + } + } else if (ctx.m && fill_packs_from_midx(&ctx, preferred_pack_name, + flags) < 0) { goto cleanup; } @@ -988,7 +1138,8 @@ static int write_midx_internal(const char *object_dir, for_each_file_in_pack_dir(object_dir, add_pack_to_midx, &ctx); stop_progress(&ctx.progress); - if ((ctx.m && ctx.nr == ctx.m->num_packs) && + if ((ctx.m && ctx.nr == ctx.m->num_packs + ctx.m->num_packs_in_base) && + !ctx.incremental && !(packs_to_include || packs_to_drop)) { struct bitmap_index *bitmap_git; int bitmap_exists; @@ -1004,12 +1155,14 @@ static int write_midx_internal(const char *object_dir, * corresponding bitmap (or one wasn't requested). */ if (!want_bitmap) - clear_midx_files_ext(object_dir, ".bitmap", - NULL); + clear_midx_files_ext(object_dir, "bitmap", NULL); goto cleanup; } } + if (ctx.incremental && !ctx.nr) + goto cleanup; /* nothing to do */ + if (preferred_pack_name) { ctx.preferred_pack_idx = -1; @@ -1155,8 +1308,30 @@ static int write_midx_internal(const char *object_dir, pack_name_concat_len += MIDX_CHUNK_ALIGNMENT - (pack_name_concat_len % MIDX_CHUNK_ALIGNMENT); - hold_lock_file_for_update(&lk, midx_name.buf, LOCK_DIE_ON_ERROR); - f = hashfd(get_lock_file_fd(&lk), get_lock_file_path(&lk)); + if (ctx.incremental) { + struct strbuf lock_name = STRBUF_INIT; + + get_midx_chain_filename(&lock_name, object_dir); + hold_lock_file_for_update(&lk, lock_name.buf, LOCK_DIE_ON_ERROR); + strbuf_release(&lock_name); + + incr = mks_tempfile_m(midx_name.buf, 0444); + if (!incr) { + error(_("unable to create temporary MIDX layer")); + return -1; + } + + if (adjust_shared_perm(get_tempfile_path(incr))) { + error(_("unable to adjust shared permissions for '%s'"), + get_tempfile_path(incr)); + return -1; + } + + f = hashfd(get_tempfile_fd(incr), get_tempfile_path(incr)); + } else { + hold_lock_file_for_update(&lk, midx_name.buf, LOCK_DIE_ON_ERROR); + f = hashfd(get_lock_file_fd(&lk), get_lock_file_path(&lk)); + } if (ctx.nr - dropped_packs == 0) { error(_("no pack files to index.")); @@ -1249,14 +1424,55 @@ static int write_midx_internal(const char *object_dir, * have been freed in the previous if block. */ - if (ctx.m) + CALLOC_ARRAY(keep_hashes, ctx.num_multi_pack_indexes_before + 1); + + if (ctx.incremental) { + FILE *chainf = fdopen_lock_file(&lk, "w"); + struct strbuf final_midx_name = STRBUF_INIT; + struct multi_pack_index *m = ctx.base_midx; + + if (!chainf) { + error_errno(_("unable to open multi-pack-index chain file")); + return -1; + } + + if (link_midx_to_chain(ctx.base_midx) < 0) + return -1; + + get_split_midx_filename_ext(&final_midx_name, object_dir, + midx_hash, MIDX_EXT_MIDX); + + if (rename_tempfile(&incr, final_midx_name.buf) < 0) { + error_errno(_("unable to rename new multi-pack-index layer")); + return -1; + } + + keep_hashes[ctx.num_multi_pack_indexes_before] = + xstrdup(hash_to_hex(midx_hash)); + + for (i = 0; i < ctx.num_multi_pack_indexes_before; i++) { + uint32_t j = ctx.num_multi_pack_indexes_before - i - 1; + + keep_hashes[j] = xstrdup(hash_to_hex(get_midx_checksum(m))); + m = m->base_midx; + } + + for (i = 0; i < ctx.num_multi_pack_indexes_before + 1; i++) + fprintf(get_lock_file_fp(&lk), "%s\n", keep_hashes[i]); + } else { + keep_hashes[ctx.num_multi_pack_indexes_before] = + xstrdup(hash_to_hex(midx_hash)); + } + + if (ctx.m || ctx.base_midx) close_object_store(the_repository->objects); if (commit_lock_file(&lk) < 0) die_errno(_("could not write multi-pack-index")); - clear_midx_files_ext(object_dir, ".bitmap", midx_hash); - clear_midx_files_ext(object_dir, ".rev", midx_hash); + clear_midx_files(object_dir, keep_hashes, + ctx.num_multi_pack_indexes_before + 1, + ctx.incremental); cleanup: for (i = 0; i < ctx.nr; i++) { @@ -1271,6 +1487,11 @@ cleanup: free(ctx.entries); free(ctx.pack_perm); free(ctx.pack_order); + if (keep_hashes) { + for (i = 0; i < ctx.num_multi_pack_indexes_before + 1; i++) + free((char *)keep_hashes[i]); + free(keep_hashes); + } strbuf_release(&midx_name); trace2_region_leave("midx", "write_midx_internal", the_repository); @@ -1307,6 +1528,9 @@ int expire_midx_packs(struct repository *r, const char *object_dir, unsigned fla if (!m) return 0; + if (m->base_midx) + die(_("cannot expire packs from an incremental multi-pack-index")); + CALLOC_ARRAY(count, m->num_packs); if (flags & MIDX_PROGRESS) @@ -1481,6 +1705,8 @@ int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, if (!m) return 0; + if (m->base_midx) + die(_("cannot repack an incremental multi-pack-index")); CALLOC_ARRAY(include_pack, m->num_packs); diff --git a/midx.c b/midx.c index 3992b05465..c867b2b6c2 100644 --- a/midx.c +++ b/midx.c @@ -16,7 +16,10 @@ int midx_checksum_valid(struct multi_pack_index *m); void clear_midx_files_ext(const char *object_dir, const char *ext, - unsigned char *keep_hash); + const char *keep_hash); +void clear_incremental_midx_files_ext(const char *object_dir, const char *ext, + char **keep_hashes, + uint32_t hashes_nr); int cmp_idx_or_pack_name(const char *idx_or_pack_name, const char *idx_name); @@ -91,7 +94,9 @@ static int midx_read_object_offsets(const unsigned char *chunk_start, #define MIDX_MIN_SIZE (MIDX_HEADER_SIZE + the_hash_algo->rawsz) -struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local) +static struct multi_pack_index *load_multi_pack_index_one(const char *object_dir, + const char *midx_name, + int local) { struct multi_pack_index *m = NULL; int fd; @@ -99,31 +104,26 @@ struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local size_t midx_size; void *midx_map = NULL; uint32_t hash_version; - struct strbuf midx_name = STRBUF_INIT; uint32_t i; const char *cur_pack_name; struct chunkfile *cf = NULL; - get_midx_filename(&midx_name, object_dir); - - fd = git_open(midx_name.buf); + fd = git_open(midx_name); if (fd < 0) goto cleanup_fail; if (fstat(fd, &st)) { - error_errno(_("failed to read %s"), midx_name.buf); + error_errno(_("failed to read %s"), midx_name); goto cleanup_fail; } midx_size = xsize_t(st.st_size); if (midx_size < MIDX_MIN_SIZE) { - error(_("multi-pack-index file %s is too small"), midx_name.buf); + error(_("multi-pack-index file %s is too small"), midx_name); goto cleanup_fail; } - strbuf_release(&midx_name); - midx_map = xmmap(NULL, midx_size, PROT_READ, MAP_PRIVATE, fd, 0); close(fd); @@ -213,7 +213,6 @@ struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local cleanup_fail: free(m); - strbuf_release(&midx_name); free_chunkfile(cf); if (midx_map) munmap(midx_map, midx_size); @@ -222,6 +221,173 @@ cleanup_fail: return NULL; } +void get_midx_chain_dirname(struct strbuf *buf, const char *object_dir) +{ + strbuf_addf(buf, "%s/pack/multi-pack-index.d", object_dir); +} + +void get_midx_chain_filename(struct strbuf *buf, const char *object_dir) +{ + get_midx_chain_dirname(buf, object_dir); + strbuf_addstr(buf, "/multi-pack-index-chain"); +} + +void get_split_midx_filename_ext(struct strbuf *buf, const char *object_dir, + const unsigned char *hash, const char *ext) +{ + get_midx_chain_dirname(buf, object_dir); + strbuf_addf(buf, "/multi-pack-index-%s.%s", hash_to_hex(hash), ext); +} + +static int open_multi_pack_index_chain(const char *chain_file, + int *fd, struct stat *st) +{ + *fd = git_open(chain_file); + if (*fd < 0) + return 0; + if (fstat(*fd, st)) { + close(*fd); + return 0; + } + if (st->st_size < the_hash_algo->hexsz) { + close(*fd); + if (!st->st_size) { + /* treat empty files the same as missing */ + errno = ENOENT; + } else { + warning(_("multi-pack-index chain file too small")); + errno = EINVAL; + } + return 0; + } + return 1; +} + +static int add_midx_to_chain(struct multi_pack_index *midx, + struct multi_pack_index *midx_chain, + struct object_id *oids, + int n) +{ + if (midx_chain) { + if (unsigned_add_overflows(midx_chain->num_packs, + midx_chain->num_packs_in_base)) { + warning(_("pack count in base MIDX too high: %"PRIuMAX), + (uintmax_t)midx_chain->num_packs_in_base); + return 0; + } + if (unsigned_add_overflows(midx_chain->num_objects, + midx_chain->num_objects_in_base)) { + warning(_("object count in base MIDX too high: %"PRIuMAX), + (uintmax_t)midx_chain->num_objects_in_base); + return 0; + } + midx->num_packs_in_base = midx_chain->num_packs + + midx_chain->num_packs_in_base; + midx->num_objects_in_base = midx_chain->num_objects + + midx_chain->num_objects_in_base; + } + + midx->base_midx = midx_chain; + midx->has_chain = 1; + + return 1; +} + +static struct multi_pack_index *load_midx_chain_fd_st(const char *object_dir, + int local, + int fd, struct stat *st, + int *incomplete_chain) +{ + struct multi_pack_index *midx_chain = NULL; + struct strbuf buf = STRBUF_INIT; + struct object_id *layers = NULL; + int valid = 1; + uint32_t i, count; + FILE *fp = xfdopen(fd, "r"); + + count = st->st_size / (the_hash_algo->hexsz + 1); + CALLOC_ARRAY(layers, count); + + for (i = 0; i < count; i++) { + struct multi_pack_index *m; + + if (strbuf_getline_lf(&buf, fp) == EOF) + break; + + if (get_oid_hex(buf.buf, &layers[i])) { + warning(_("invalid multi-pack-index chain: line '%s' " + "not a hash"), + buf.buf); + valid = 0; + break; + } + + valid = 0; + + strbuf_reset(&buf); + get_split_midx_filename_ext(&buf, object_dir, layers[i].hash, + MIDX_EXT_MIDX); + m = load_multi_pack_index_one(object_dir, buf.buf, local); + + if (m) { + if (add_midx_to_chain(m, midx_chain, layers, i)) { + midx_chain = m; + valid = 1; + } else { + close_midx(m); + } + } + if (!valid) { + warning(_("unable to find all multi-pack index files")); + break; + } + } + + free(layers); + fclose(fp); + strbuf_release(&buf); + + *incomplete_chain = !valid; + return midx_chain; +} + +static struct multi_pack_index *load_multi_pack_index_chain(const char *object_dir, + int local) +{ + struct strbuf chain_file = STRBUF_INIT; + struct stat st; + int fd; + struct multi_pack_index *m = NULL; + + get_midx_chain_filename(&chain_file, object_dir); + if (open_multi_pack_index_chain(chain_file.buf, &fd, &st)) { + int incomplete; + /* ownership of fd is taken over by load function */ + m = load_midx_chain_fd_st(object_dir, local, fd, &st, + &incomplete); + } + + strbuf_release(&chain_file); + return m; +} + +struct multi_pack_index *load_multi_pack_index(const char *object_dir, + int local) +{ + struct strbuf midx_name = STRBUF_INIT; + struct multi_pack_index *m; + + get_midx_filename(&midx_name, object_dir); + + m = load_multi_pack_index_one(object_dir, midx_name.buf, local); + if (!m) + m = load_multi_pack_index_chain(object_dir, local); + + strbuf_release(&midx_name); + + return m; +} + void close_midx(struct multi_pack_index *m) { uint32_t i; @@ -230,6 +396,7 @@ void close_midx(struct multi_pack_index *m) return; close_midx(m->next); + close_midx(m->base_midx); munmap((unsigned char *)m->data, m->data_len); @@ -242,14 +409,49 @@ void close_midx(struct multi_pack_index *m) free(m); } -int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id) +static uint32_t midx_for_object(struct multi_pack_index **_m, uint32_t pos) +{ + struct multi_pack_index *m = *_m; + while (m && pos < m->num_objects_in_base) + m = m->base_midx; + + if (!m) + BUG("NULL multi-pack-index for object position: %"PRIu32, pos); + + if (pos >= m->num_objects + m->num_objects_in_base) + die(_("invalid MIDX object position, MIDX is likely corrupt")); + + *_m = m; + + return pos - m->num_objects_in_base; +} + +static uint32_t midx_for_pack(struct multi_pack_index **_m, + uint32_t pack_int_id) +{ + struct multi_pack_index *m = *_m; + while (m && pack_int_id < m->num_packs_in_base) + m = m->base_midx; + + if (!m) + BUG("NULL multi-pack-index for pack ID: %"PRIu32, pack_int_id); + + if (pack_int_id >= m->num_packs + m->num_packs_in_base) + die(_("bad pack-int-id: %u (%u total packs)"), + pack_int_id, m->num_packs + m->num_packs_in_base); + + *_m = m; + + return pack_int_id - m->num_packs_in_base; +} + +int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, + uint32_t pack_int_id) { struct strbuf pack_name = STRBUF_INIT; struct packed_git *p; - if (pack_int_id >= m->num_packs) - die(_("bad pack-int-id: %u (%u total packs)"), - pack_int_id, m->num_packs); + pack_int_id = midx_for_pack(&m, pack_int_id); if (m->packs[pack_int_id]) return 0; @@ -271,41 +473,71 @@ int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t return 0; } +struct packed_git *nth_midxed_pack(struct multi_pack_index *m, + uint32_t pack_int_id) +{ + uint32_t local_pack_int_id = midx_for_pack(&m, pack_int_id); + return m->packs[local_pack_int_id]; +} + #define MIDX_CHUNK_BITMAPPED_PACKS_WIDTH (2 * sizeof(uint32_t)) int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m, struct bitmapped_pack *bp, uint32_t pack_int_id) { + uint32_t local_pack_int_id = midx_for_pack(&m, pack_int_id); + if (!m->chunk_bitmapped_packs) return error(_("MIDX does not contain the BTMP chunk")); if (prepare_midx_pack(r, m, pack_int_id)) return error(_("could not load bitmapped pack %"PRIu32), pack_int_id); - bp->p = m->packs[pack_int_id]; + bp->p = m->packs[local_pack_int_id]; bp->bitmap_pos = get_be32((char *)m->chunk_bitmapped_packs + - MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * pack_int_id); + MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * local_pack_int_id); bp->bitmap_nr = get_be32((char *)m->chunk_bitmapped_packs + - MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * pack_int_id + + MIDX_CHUNK_BITMAPPED_PACKS_WIDTH * local_pack_int_id + sizeof(uint32_t)); bp->pack_int_id = pack_int_id; return 0; } -int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result) +int bsearch_one_midx(const struct object_id *oid, struct multi_pack_index *m, + uint32_t *result) { - return bsearch_hash(oid->hash, m->chunk_oid_fanout, m->chunk_oid_lookup, - the_hash_algo->rawsz, result); + int ret = bsearch_hash(oid->hash, m->chunk_oid_fanout, + m->chunk_oid_lookup, the_hash_algo->rawsz, + result); + if (result) + *result += m->num_objects_in_base; + return ret; +} + +int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, + uint32_t *result) +{ + for (; m; m = m->base_midx) + if (bsearch_one_midx(oid, m, result)) + return 1; + return 0; +} + +int midx_has_oid(struct multi_pack_index *m, const struct object_id *oid) +{ + return bsearch_midx(oid, m, NULL); } struct object_id *nth_midxed_object_oid(struct object_id *oid, struct multi_pack_index *m, uint32_t n) { - if (n >= m->num_objects) + if (n >= m->num_objects + m->num_objects_in_base) return NULL; + n = midx_for_object(&m, n); + oidread(oid, m->chunk_oid_lookup + st_mult(m->hash_len, n), the_repository->hash_algo); return oid; @@ -316,6 +548,8 @@ off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos) const unsigned char *offset_data; uint32_t offset32; + pos = midx_for_object(&m, pos); + offset_data = m->chunk_object_offsets + (off_t)pos * MIDX_CHUNK_OFFSET_WIDTH; offset32 = get_be32(offset_data + sizeof(uint32_t)); @@ -334,8 +568,10 @@ off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos) uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos) { - return get_be32(m->chunk_object_offsets + - (off_t)pos * MIDX_CHUNK_OFFSET_WIDTH); + pos = midx_for_object(&m, pos); + + return m->num_packs_in_base + get_be32(m->chunk_object_offsets + + (off_t)pos * MIDX_CHUNK_OFFSET_WIDTH); } int fill_midx_entry(struct repository *r, @@ -350,14 +586,12 @@ int fill_midx_entry(struct repository *r, if (!bsearch_midx(oid, m, &pos)) return 0; - if (pos >= m->num_objects) - return 0; - + midx_for_object(&m, pos); pack_int_id = nth_midxed_pack_int_id(m, pos); if (prepare_midx_pack(r, m, pack_int_id)) return 0; - p = m->packs[pack_int_id]; + p = m->packs[pack_int_id - m->num_packs_in_base]; /* * We are about to tell the caller where they can locate the @@ -411,8 +645,8 @@ int cmp_idx_or_pack_name(const char *idx_or_pack_name, return strcmp(idx_or_pack_name, idx_name); } -int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name, - uint32_t *pos) +static int midx_contains_pack_1(struct multi_pack_index *m, + const char *idx_or_pack_name) { uint32_t first = 0, last = m->num_packs; @@ -423,11 +657,8 @@ int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name, current = m->pack_names[mid]; cmp = cmp_idx_or_pack_name(idx_or_pack_name, current); - if (!cmp) { - if (pos) - *pos = mid; + if (!cmp) return 1; - } if (cmp > 0) { first = mid + 1; continue; @@ -440,19 +671,25 @@ int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name, int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name) { - return midx_locate_pack(m, idx_or_pack_name, NULL); + for (; m; m = m->base_midx) + if (midx_contains_pack_1(m, idx_or_pack_name)) + return 1; + return 0; } int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id) { if (m->preferred_pack_idx == -1) { + uint32_t midx_pos; if (load_midx_revindex(m) < 0) { m->preferred_pack_idx = -2; return -1; } - m->preferred_pack_idx = - nth_midxed_pack_int_id(m, pack_pos_to_midx(m, 0)); + midx_pos = pack_pos_to_midx(m, m->num_objects_in_base); + + m->preferred_pack_idx = nth_midxed_pack_int_id(m, midx_pos); + } else if (m->preferred_pack_idx == -2) return -1; /* no revindex */ @@ -494,7 +731,8 @@ int midx_checksum_valid(struct multi_pack_index *m) } struct clear_midx_data { - char *keep; + char **keep; + uint32_t keep_nr; const char *ext; }; @@ -502,32 +740,63 @@ static void clear_midx_file_ext(const char *full_path, size_t full_path_len UNUS const char *file_name, void *_data) { struct clear_midx_data *data = _data; + uint32_t i; if (!(starts_with(file_name, "multi-pack-index-") && ends_with(file_name, data->ext))) return; - if (data->keep && !strcmp(data->keep, file_name)) - return; - + for (i = 0; i < data->keep_nr; i++) { + if (!strcmp(data->keep[i], file_name)) + return; + } if (unlink(full_path)) die_errno(_("failed to remove %s"), full_path); } void clear_midx_files_ext(const char *object_dir, const char *ext, - unsigned char *keep_hash) + const char *keep_hash) { struct clear_midx_data data; memset(&data, 0, sizeof(struct clear_midx_data)); - if (keep_hash) - data.keep = xstrfmt("multi-pack-index-%s%s", - hash_to_hex(keep_hash), ext); + if (keep_hash) { + ALLOC_ARRAY(data.keep, 1); + + data.keep[0] = xstrfmt("multi-pack-index-%s.%s", keep_hash, ext); + data.keep_nr = 1; + } data.ext = ext; for_each_file_in_pack_dir(object_dir, clear_midx_file_ext, &data); + if (keep_hash) + free(data.keep[0]); + free(data.keep); +} + +void clear_incremental_midx_files_ext(const char *object_dir, const char *ext, + char **keep_hashes, + uint32_t hashes_nr) +{ + struct clear_midx_data data; + uint32_t i; + + memset(&data, 0, sizeof(struct clear_midx_data)); + + ALLOC_ARRAY(data.keep, hashes_nr); + for (i = 0; i < hashes_nr; i++) + data.keep[i] = xstrfmt("multi-pack-index-%s.%s", keep_hashes[i], + ext); + data.keep_nr = hashes_nr; + data.ext = ext; + + for_each_file_in_pack_subdir(object_dir, "multi-pack-index.d", + clear_midx_file_ext, &data); + + for (i = 0; i < hashes_nr; i++) + free(data.keep[i]); free(data.keep); } @@ -545,8 +814,8 @@ 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->odb->path, ".bitmap", NULL); - clear_midx_files_ext(r->objects->odb->path, ".rev", NULL); + clear_midx_files_ext(r->objects->odb->path, MIDX_EXT_BITMAP, NULL); + clear_midx_files_ext(r->objects->odb->path, MIDX_EXT_REV, NULL); strbuf_release(&midx); } @@ -596,6 +865,7 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag uint32_t i; struct progress *progress = NULL; struct multi_pack_index *m = load_multi_pack_index(object_dir, 1); + struct multi_pack_index *curr; verify_midx_error = 0; if (!m) { @@ -618,8 +888,8 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag if (flags & MIDX_PROGRESS) progress = start_delayed_progress(_("Looking for referenced packfiles"), - m->num_packs); - for (i = 0; i < m->num_packs; i++) { + m->num_packs + m->num_packs_in_base); + for (i = 0; i < m->num_packs + m->num_packs_in_base; i++) { if (prepare_midx_pack(r, m, i)) midx_report("failed to load pack in position %d", i); @@ -639,17 +909,20 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag if (flags & MIDX_PROGRESS) progress = start_sparse_progress(_("Verifying OID order in multi-pack-index"), m->num_objects - 1); - for (i = 0; i < m->num_objects - 1; i++) { - struct object_id oid1, oid2; - nth_midxed_object_oid(&oid1, m, i); - nth_midxed_object_oid(&oid2, m, i + 1); + for (curr = m; curr; curr = curr->base_midx) { + for (i = 0; i < m->num_objects - 1; i++) { + struct object_id oid1, oid2; - if (oidcmp(&oid1, &oid2) >= 0) - midx_report(_("oid lookup out of order: oid[%d] = %s >= %s = oid[%d]"), - i, oid_to_hex(&oid1), oid_to_hex(&oid2), i + 1); + nth_midxed_object_oid(&oid1, m, m->num_objects_in_base + i); + nth_midxed_object_oid(&oid2, m, m->num_objects_in_base + i + 1); - midx_display_sparse_progress(progress, i + 1); + if (oidcmp(&oid1, &oid2) >= 0) + midx_report(_("oid lookup out of order: oid[%d] = %s >= %s = oid[%d]"), + i, oid_to_hex(&oid1), oid_to_hex(&oid2), i + 1); + + midx_display_sparse_progress(progress, i + 1); + } } stop_progress(&progress); @@ -659,8 +932,8 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag * each of the objects and only require 1 packfile to be open at a * time. */ - ALLOC_ARRAY(pairs, m->num_objects); - for (i = 0; i < m->num_objects; i++) { + ALLOC_ARRAY(pairs, m->num_objects + m->num_objects_in_base); + for (i = 0; i < m->num_objects + m->num_objects_in_base; i++) { pairs[i].pos = i; pairs[i].pack_int_id = nth_midxed_pack_int_id(m, i); } @@ -674,16 +947,18 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag if (flags & MIDX_PROGRESS) progress = start_sparse_progress(_("Verifying object offsets"), m->num_objects); - for (i = 0; i < m->num_objects; i++) { + for (i = 0; i < m->num_objects + m->num_objects_in_base; i++) { struct object_id oid; struct pack_entry e; off_t m_offset, p_offset; if (i > 0 && pairs[i-1].pack_int_id != pairs[i].pack_int_id && - m->packs[pairs[i-1].pack_int_id]) - { - close_pack_fd(m->packs[pairs[i-1].pack_int_id]); - close_pack_index(m->packs[pairs[i-1].pack_int_id]); + nth_midxed_pack(m, pairs[i-1].pack_int_id)) { + uint32_t pack_int_id = pairs[i-1].pack_int_id; + struct packed_git *p = nth_midxed_pack(m, pack_int_id); + + close_pack_fd(p); + close_pack_index(p); } nth_midxed_object_oid(&oid, m, pairs[i].pos); diff --git a/midx.h b/midx.h index 8554f2d616..42d4f8d149 100644 --- a/midx.h +++ b/midx.h @@ -24,12 +24,13 @@ struct bitmapped_pack; #define MIDX_CHUNKID_OBJECTOFFSETS 0x4f4f4646 /* "OOFF" */ #define MIDX_CHUNKID_LARGEOFFSETS 0x4c4f4646 /* "LOFF" */ #define MIDX_CHUNKID_REVINDEX 0x52494458 /* "RIDX" */ +#define MIDX_CHUNKID_BASE 0x42415345 /* "BASE" */ #define MIDX_CHUNK_OFFSET_WIDTH (2 * sizeof(uint32_t)) #define MIDX_LARGE_OFFSET_NEEDED 0x80000000 #define GIT_TEST_MULTI_PACK_INDEX "GIT_TEST_MULTI_PACK_INDEX" -#define GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP \ - "GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP" +#define GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL \ + "GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL" struct multi_pack_index { struct multi_pack_index *next; @@ -50,6 +51,7 @@ struct multi_pack_index { int preferred_pack_idx; int local; + int has_chain; const unsigned char *chunk_pack_names; size_t chunk_pack_names_len; @@ -63,6 +65,10 @@ struct multi_pack_index { const unsigned char *chunk_revindex; size_t chunk_revindex_len; + struct multi_pack_index *base_midx; + uint32_t num_objects_in_base; + uint32_t num_packs_in_base; + const char **pack_names; struct packed_git **packs; char object_dir[FLEX_ARRAY]; @@ -73,20 +79,32 @@ struct multi_pack_index { #define MIDX_WRITE_BITMAP (1 << 2) #define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3) #define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4) +#define MIDX_WRITE_INCREMENTAL (1 << 5) #define MIDX_EXT_REV "rev" #define MIDX_EXT_BITMAP "bitmap" +#define MIDX_EXT_MIDX "midx" const unsigned char *get_midx_checksum(struct multi_pack_index *m); void get_midx_filename(struct strbuf *out, const char *object_dir); void get_midx_filename_ext(struct strbuf *out, const char *object_dir, 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(struct strbuf *buf, const char *object_dir, + const unsigned char *hash, const char *ext); struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local); int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id); +struct packed_git *nth_midxed_pack(struct multi_pack_index *m, + uint32_t pack_int_id); int nth_bitmapped_pack(struct repository *r, struct multi_pack_index *m, struct bitmapped_pack *bp, uint32_t pack_int_id); -int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result); +int bsearch_one_midx(const struct object_id *oid, struct multi_pack_index *m, + uint32_t *result); +int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, + uint32_t *result); +int midx_has_oid(struct multi_pack_index *m, const struct object_id *oid); off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos); uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos); struct object_id *nth_midxed_object_oid(struct object_id *oid, @@ -95,8 +113,6 @@ struct object_id *nth_midxed_object_oid(struct object_id *oid, int fill_midx_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e, struct multi_pack_index *m); int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name); -int midx_locate_pack(struct multi_pack_index *m, const char *idx_or_pack_name, - uint32_t *pos); int midx_preferred_pack(struct multi_pack_index *m, uint32_t *pack_int_id); int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local); diff --git a/object-name.c b/object-name.c index a3e13c16af..f340b740c5 100644 --- a/object-name.c +++ b/object-name.c @@ -135,28 +135,32 @@ static int match_hash(unsigned len, const unsigned char *a, const unsigned char static void unique_in_midx(struct multi_pack_index *m, struct disambiguate_state *ds) { - uint32_t num, i, first = 0; - const struct object_id *current = NULL; - int len = ds->len > ds->repo->hash_algo->hexsz ? - ds->repo->hash_algo->hexsz : ds->len; - num = m->num_objects; + for (; m; m = m->base_midx) { + uint32_t num, i, first = 0; + const struct object_id *current = NULL; + int len = ds->len > ds->repo->hash_algo->hexsz ? + ds->repo->hash_algo->hexsz : ds->len; - if (!num) - return; + if (!m->num_objects) + continue; - bsearch_midx(&ds->bin_pfx, m, &first); + num = m->num_objects + m->num_objects_in_base; - /* - * At this point, "first" is the location of the lowest object - * with an object name that could match "bin_pfx". See if we have - * 0, 1 or more objects that actually match(es). - */ - for (i = first; i < num && !ds->ambiguous; i++) { - struct object_id oid; - current = nth_midxed_object_oid(&oid, m, i); - if (!match_hash(len, ds->bin_pfx.hash, current->hash)) - break; - update_candidates(ds, current); + bsearch_one_midx(&ds->bin_pfx, m, &first); + + /* + * At this point, "first" is the location of the lowest + * object with an object name that could match + * "bin_pfx". See if we have 0, 1 or more objects that + * actually match(es). + */ + for (i = first; i < num && !ds->ambiguous; i++) { + struct object_id oid; + current = nth_midxed_object_oid(&oid, m, i); + if (!match_hash(len, ds->bin_pfx.hash, current->hash)) + break; + update_candidates(ds, current); + } } } @@ -709,37 +713,40 @@ static int repo_extend_abbrev_len(struct repository *r UNUSED, static void find_abbrev_len_for_midx(struct multi_pack_index *m, struct min_abbrev_data *mad) { - int match = 0; - uint32_t num, first = 0; - struct object_id oid; - const struct object_id *mad_oid; + for (; m; m = m->base_midx) { + int match = 0; + uint32_t num, first = 0; + struct object_id oid; + const struct object_id *mad_oid; - if (!m->num_objects) - return; + if (!m->num_objects) + continue; - num = m->num_objects; - mad_oid = mad->oid; - match = bsearch_midx(mad_oid, m, &first); + num = m->num_objects + m->num_objects_in_base; + mad_oid = mad->oid; + match = bsearch_one_midx(mad_oid, m, &first); - /* - * first is now the position in the packfile where we would insert - * mad->hash if it does not exist (or the position of mad->hash if - * it does exist). Hence, we consider a maximum of two objects - * nearby for the abbreviation length. - */ - mad->init_len = 0; - if (!match) { - if (nth_midxed_object_oid(&oid, m, first)) - extend_abbrev_len(&oid, mad); - } else if (first < num - 1) { - if (nth_midxed_object_oid(&oid, m, first + 1)) - extend_abbrev_len(&oid, mad); + /* + * first is now the position in the packfile where we + * would insert mad->hash if it does not exist (or the + * position of mad->hash if it does exist). Hence, we + * consider a maximum of two objects nearby for the + * abbreviation length. + */ + mad->init_len = 0; + if (!match) { + if (nth_midxed_object_oid(&oid, m, first)) + extend_abbrev_len(&oid, mad); + } else if (first < num - 1) { + if (nth_midxed_object_oid(&oid, m, first + 1)) + extend_abbrev_len(&oid, mad); + } + if (first > 0) { + if (nth_midxed_object_oid(&oid, m, first - 1)) + extend_abbrev_len(&oid, mad); + } + mad->init_len = mad->cur_len; } - if (first > 0) { - if (nth_midxed_object_oid(&oid, m, first - 1)) - extend_abbrev_len(&oid, mad); - } - mad->init_len = mad->cur_len; } static void find_abbrev_len_for_pack(struct packed_git *p, diff --git a/packfile.c b/packfile.c index 813584646f..cf12a539ea 100644 --- a/packfile.c +++ b/packfile.c @@ -815,9 +815,10 @@ static void report_pack_garbage(struct string_list *list) report_helper(list, seen_bits, first, list->nr); } -void for_each_file_in_pack_dir(const char *objdir, - each_file_in_pack_dir_fn fn, - void *data) +void for_each_file_in_pack_subdir(const char *objdir, + const char *subdir, + each_file_in_pack_dir_fn fn, + void *data) { struct strbuf path = STRBUF_INIT; size_t dirnamelen; @@ -826,6 +827,8 @@ void for_each_file_in_pack_dir(const char *objdir, strbuf_addstr(&path, objdir); strbuf_addstr(&path, "/pack"); + if (subdir) + strbuf_addf(&path, "/%s", subdir); dir = opendir(path.buf); if (!dir) { if (errno != ENOENT) @@ -847,6 +850,13 @@ void for_each_file_in_pack_dir(const char *objdir, strbuf_release(&path); } +void for_each_file_in_pack_dir(const char *objdir, + each_file_in_pack_dir_fn fn, + void *data) +{ + for_each_file_in_pack_subdir(objdir, NULL, fn, data); +} + struct prepare_pack_data { struct repository *r; struct string_list *garbage; @@ -880,7 +890,8 @@ static void prepare_pack(const char *full_name, size_t full_name_len, if (!report_garbage) return; - if (!strcmp(file_name, "multi-pack-index")) + if (!strcmp(file_name, "multi-pack-index") || + !strcmp(file_name, "multi-pack-index.d")) return; if (starts_with(file_name, "multi-pack-index") && (ends_with(file_name, ".bitmap") || ends_with(file_name, ".rev"))) @@ -1064,7 +1075,7 @@ struct packed_git *get_all_packs(struct repository *r) prepare_packed_git(r); for (m = r->objects->multi_pack_index; m; m = m->next) { uint32_t i; - for (i = 0; i < m->num_packs; i++) + for (i = 0; i < m->num_packs + m->num_packs_in_base; i++) prepare_midx_pack(r, m, i); } diff --git a/packfile.h b/packfile.h index eb18ec15db..0f78658229 100644 --- a/packfile.h +++ b/packfile.h @@ -55,6 +55,10 @@ struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); typedef void each_file_in_pack_dir_fn(const char *full_path, size_t full_path_len, const char *file_name, void *data); +void for_each_file_in_pack_subdir(const char *objdir, + const char *subdir, + each_file_in_pack_dir_fn fn, + void *data); void for_each_file_in_pack_dir(const char *objdir, each_file_in_pack_dir_fn fn, void *data); diff --git a/t/README b/t/README index 724ee58195..44c02d8129 100644 --- a/t/README +++ b/t/README @@ -445,9 +445,9 @@ GIT_TEST_MULTI_PACK_INDEX=, when true, forces the multi-pack- index to be written after every 'git repack' command, and overrides the 'core.multiPackIndex' setting to true. -GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=, when true, sets the -'--bitmap' option on all invocations of 'git multi-pack-index write', -and ignores pack-objects' '--write-bitmap-index'. +GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=, when true, sets +the '--incremental' option on all invocations of 'git multi-pack-index +write'. GIT_TEST_SIDEBAND_ALL=, when true, overrides the 'uploadpack.allowSidebandAll' setting to true, and when false, forces diff --git a/t/helper/test-read-midx.c b/t/helper/test-read-midx.c index 83effc2b5f..69757e94fc 100644 --- a/t/helper/test-read-midx.c +++ b/t/helper/test-read-midx.c @@ -9,8 +9,10 @@ #include "packfile.h" #include "setup.h" #include "gettext.h" +#include "pack-revindex.h" -static int read_midx_file(const char *object_dir, int show_objects) +static int read_midx_file(const char *object_dir, const char *checksum, + int show_objects) { uint32_t i; struct multi_pack_index *m; @@ -21,6 +23,13 @@ static int read_midx_file(const char *object_dir, int show_objects) if (!m) return 1; + if (checksum) { + while (m && strcmp(hash_to_hex(get_midx_checksum(m)), checksum)) + m = m->base_midx; + if (!m) + return 1; + } + printf("header: %08x %d %d %d %d\n", m->signature, m->version, @@ -54,7 +63,8 @@ static int read_midx_file(const char *object_dir, int show_objects) struct pack_entry e; for (i = 0; i < m->num_objects; i++) { - nth_midxed_object_oid(&oid, m, i); + nth_midxed_object_oid(&oid, m, + i + m->num_objects_in_base); fill_midx_entry(the_repository, &oid, &e, m); printf("%s %"PRIu64"\t%s\n", @@ -111,7 +121,7 @@ static int read_midx_bitmapped_packs(const char *object_dir) if (!midx) return 1; - for (i = 0; i < midx->num_packs; i++) { + for (i = 0; i < midx->num_packs + midx->num_packs_in_base; i++) { if (nth_bitmapped_pack(the_repository, midx, &pack, i) < 0) return 1; @@ -127,16 +137,16 @@ static int read_midx_bitmapped_packs(const char *object_dir) int cmd__read_midx(int argc, const char **argv) { - if (!(argc == 2 || argc == 3)) - usage("read-midx [--show-objects|--checksum|--preferred-pack|--bitmap] "); + if (!(argc == 2 || argc == 3 || argc == 4)) + usage("read-midx [--show-objects|--checksum|--preferred-pack|--bitmap] "); if (!strcmp(argv[1], "--show-objects")) - return read_midx_file(argv[2], 1); + return read_midx_file(argv[2], argv[3], 1); else if (!strcmp(argv[1], "--checksum")) return read_midx_checksum(argv[2]); else if (!strcmp(argv[1], "--preferred-pack")) return read_midx_preferred_pack(argv[2]); else if (!strcmp(argv[1], "--bitmap")) return read_midx_bitmapped_packs(argv[2]); - return read_midx_file(argv[1], 0); + return read_midx_file(argv[1], argv[2], 0); } diff --git a/t/lib-bitmap.sh b/t/lib-bitmap.sh index f595937094..62aa6744a6 100644 --- a/t/lib-bitmap.sh +++ b/t/lib-bitmap.sh @@ -1,6 +1,8 @@ # Helpers for scripts testing bitmap functionality; see t5310 for # example usage. +. "$TEST_DIRECTORY"/lib-midx.sh + objdir=.git/objects midx=$objdir/pack/multi-pack-index @@ -264,10 +266,6 @@ have_delta () { test_cmp expect actual } -midx_checksum () { - test-tool read-midx --checksum "$1" -} - # midx_pack_source midx_pack_source () { test-tool read-midx --show-objects .git/objects | grep "^$1 " | cut -f2 diff --git a/t/lib-midx.sh b/t/lib-midx.sh index 1261994744..e38c609604 100644 --- a/t/lib-midx.sh +++ b/t/lib-midx.sh @@ -6,3 +6,31 @@ test_midx_consistent () { test_cmp expect actual && git multi-pack-index --object-dir=$1 verify } + +midx_checksum () { + test-tool read-midx --checksum "$1" +} + +midx_git_two_modes () { + git -c core.multiPackIndex=false $1 >expect && + git -c core.multiPackIndex=true $1 >actual && + if [ "$2" = "sorted" ] + then + sort expect.sorted && + mv expect.sorted expect && + sort actual.sorted && + mv actual.sorted actual + fi && + test_cmp expect actual +} + +compare_results_with_midx () { + MSG=$1 + test_expect_success "check normal git operations: $MSG" ' + midx_git_two_modes "rev-list --objects --all" && + midx_git_two_modes "log --raw" && + midx_git_two_modes "count-objects --verbose" && + midx_git_two_modes "cat-file --batch-all-objects --batch-check" && + midx_git_two_modes "cat-file --batch-all-objects --batch-check --unordered" sorted + ' +} diff --git a/t/t0410-partial-clone.sh b/t/t0410-partial-clone.sh index 2c30c86e7b..34bdb3ab1f 100755 --- a/t/t0410-partial-clone.sh +++ b/t/t0410-partial-clone.sh @@ -5,8 +5,6 @@ test_description='partial clone' . ./test-lib.sh . "$TEST_DIRECTORY"/lib-terminal.sh -# missing promisor objects cause repacks which write bitmaps to fail -GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 # When enabled, some commands will write commit-graphs. This causes fsck # to fail when delete_object() is called because fsck will attempt to # verify the out-of-sync commit graph. diff --git a/t/t5310-pack-bitmaps.sh b/t/t5310-pack-bitmaps.sh index d7fd71360e..a6de7c5764 100755 --- a/t/t5310-pack-bitmaps.sh +++ b/t/t5310-pack-bitmaps.sh @@ -5,10 +5,6 @@ test_description='exercise basic bitmap functionality' . ./test-lib.sh . "$TEST_DIRECTORY"/lib-bitmap.sh -# t5310 deals only with single-pack bitmaps, so don't write MIDX bitmaps in -# their place. -GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 - # Likewise, allow individual tests to control whether or not they use # the boundary-based traversal. sane_unset GIT_TEST_PACK_USE_BITMAP_BOUNDARY_TRAVERSAL diff --git a/t/t5313-pack-bounds-checks.sh b/t/t5313-pack-bounds-checks.sh index ceaa6700a2..86fc73f9fb 100755 --- a/t/t5313-pack-bounds-checks.sh +++ b/t/t5313-pack-bounds-checks.sh @@ -7,11 +7,11 @@ TEST_PASSES_SANITIZE_LEAK=true clear_base () { test_when_finished 'restore_base' && - rm -f $base + rm -r -f $base } restore_base () { - cp base-backup/* .git/objects/pack/ + cp -r base-backup/* .git/objects/pack/ } do_pack () { @@ -64,9 +64,9 @@ test_expect_success 'set up base packfile and variables' ' git commit -m base && git repack -ad && base=$(echo .git/objects/pack/*) && - chmod +w $base && + chmod -R +w $base && mkdir base-backup && - cp $base base-backup/ && + cp -r $base base-backup/ && object=$(git rev-parse HEAD:file) ' diff --git a/t/t5319-multi-pack-index.sh b/t/t5319-multi-pack-index.sh index ace5ac3b61..ce1b58c732 100755 --- a/t/t5319-multi-pack-index.sh +++ b/t/t5319-multi-pack-index.sh @@ -3,8 +3,11 @@ test_description='multi-pack-indexes' . ./test-lib.sh . "$TEST_DIRECTORY"/lib-chunk.sh +. "$TEST_DIRECTORY"/lib-midx.sh GIT_TEST_MULTI_PACK_INDEX=0 +GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 +GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=0 objdir=.git/objects HASH_LEN=$(test_oid rawsz) @@ -107,30 +110,6 @@ test_expect_success 'write midx with one v1 pack' ' midx_read_expect 1 18 4 $objdir ' -midx_git_two_modes () { - git -c core.multiPackIndex=false $1 >expect && - git -c core.multiPackIndex=true $1 >actual && - if [ "$2" = "sorted" ] - then - sort expect.sorted && - mv expect.sorted expect && - sort actual.sorted && - mv actual.sorted actual - fi && - test_cmp expect actual -} - -compare_results_with_midx () { - MSG=$1 - test_expect_success "check normal git operations: $MSG" ' - midx_git_two_modes "rev-list --objects --all" && - midx_git_two_modes "log --raw" && - midx_git_two_modes "count-objects --verbose" && - midx_git_two_modes "cat-file --batch-all-objects --batch-check" && - midx_git_two_modes "cat-file --batch-all-objects --batch-check --unordered" sorted - ' -} - test_expect_success 'write midx with one v2 pack' ' git pack-objects --index-version=2,0x40 $objdir/pack/test &2 && incrpackid=$(git pack-objects --all --unpacked --incremental .git/objects/pack/pack err && + git repack -Adl --write-bitmap-index 2>err && cat >expect <<-EOF && warning: disabling bitmap writing, as some objects are not being packed EOF @@ -284,8 +286,7 @@ test_expect_success 'repacking fails when missing .pack actually means missing o test_expect_success 'bitmaps are created by default in bare repos' ' git clone --bare .git bare.git && rm -f bare.git/objects/pack/*.bitmap && - GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 \ - git -C bare.git repack -ad && + git -C bare.git repack -ad && bitmap=$(ls bare.git/objects/pack/*.bitmap) && test_path_is_file "$bitmap" ' @@ -296,8 +297,7 @@ test_expect_success 'incremental repack does not complain' ' ' test_expect_success 'bitmaps can be disabled on bare repos' ' - GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 \ - git -c repack.writeBitmaps=false -C bare.git repack -ad && + git -c repack.writeBitmaps=false -C bare.git repack -ad && bitmap=$(ls bare.git/objects/pack/*.bitmap || :) && test -z "$bitmap" ' @@ -308,8 +308,7 @@ test_expect_success 'no bitmaps created if .keep files present' ' keep=${pack%.pack}.keep && test_when_finished "rm -f \"\$keep\"" && >"$keep" && - GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 \ - git -C bare.git repack -ad 2>stderr && + git -C bare.git repack -ad 2>stderr && test_must_be_empty stderr && find bare.git/objects/pack/ -type f -name "*.bitmap" >actual && test_must_be_empty actual @@ -320,8 +319,7 @@ test_expect_success 'auto-bitmaps do not complain if unavailable' ' blob=$(test-tool genrandom big $((1024*1024)) | git -C bare.git hash-object -w --stdin) && git -C bare.git update-ref refs/tags/big $blob && - GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 \ - git -C bare.git repack -ad 2>stderr && + git -C bare.git repack -ad 2>stderr && test_must_be_empty stderr && find bare.git/objects/pack -type f -name "*.bitmap" >actual && test_must_be_empty actual @@ -342,9 +340,7 @@ test_expect_success 'repacking with a filter works' ' ' test_expect_success '--filter fails with --write-bitmap-index' ' - test_must_fail \ - env GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0 \ - git -C bare.git repack -a -d --write-bitmap-index --filter=blob:none + test_must_fail git -C bare.git repack -a -d --write-bitmap-index --filter=blob:none ' test_expect_success 'repacking with two filters works' ' @@ -540,11 +536,11 @@ test_expect_success 'setup for --write-midx tests' ' test_expect_success '--write-midx unchanged' ' ( cd midx && - GIT_TEST_MULTI_PACK_INDEX=0 git repack && + git repack && test_path_is_missing $midx && test_path_is_missing $midx-*.bitmap && - GIT_TEST_MULTI_PACK_INDEX=0 git repack --write-midx && + git repack --write-midx && test_path_is_file $midx && test_path_is_missing $midx-*.bitmap && @@ -557,7 +553,7 @@ test_expect_success '--write-midx with a new pack' ' cd midx && test_commit loose && - GIT_TEST_MULTI_PACK_INDEX=0 git repack --write-midx && + git repack --write-midx && test_path_is_file $midx && test_path_is_missing $midx-*.bitmap && @@ -568,7 +564,7 @@ test_expect_success '--write-midx with a new pack' ' test_expect_success '--write-midx with -b' ' ( cd midx && - GIT_TEST_MULTI_PACK_INDEX=0 git repack -mb && + git repack -mb && test_path_is_file $midx && test_path_is_file $midx-*.bitmap && @@ -581,7 +577,7 @@ test_expect_success '--write-midx with -d' ' cd midx && test_commit repack && - GIT_TEST_MULTI_PACK_INDEX=0 git repack -Ad --write-midx && + git repack -Ad --write-midx && test_path_is_file $midx && test_path_is_missing $midx-*.bitmap && @@ -594,21 +590,21 @@ test_expect_success 'cleans up MIDX when appropriate' ' cd midx && test_commit repack-2 && - GIT_TEST_MULTI_PACK_INDEX=0 git repack -Adb --write-midx && + git repack -Adb --write-midx && checksum=$(midx_checksum $objdir) && test_path_is_file $midx && test_path_is_file $midx-$checksum.bitmap && test_commit repack-3 && - GIT_TEST_MULTI_PACK_INDEX=0 git repack -Adb --write-midx && + git repack -Adb --write-midx && test_path_is_file $midx && test_path_is_missing $midx-$checksum.bitmap && test_path_is_file $midx-$(midx_checksum $objdir).bitmap && test_commit repack-4 && - GIT_TEST_MULTI_PACK_INDEX=0 git repack -Adb && + git repack -Adb && find $objdir/pack -type f -name "multi-pack-index*" >files && test_must_be_empty files @@ -629,7 +625,6 @@ test_expect_success '--write-midx with preferred bitmap tips' ' git log --format="create refs/tags/%s/%s %H" HEAD >refs && git update-ref --stdin