| #include "builtin.h" |
| #include "cache.h" |
| #include "config.h" |
| #include "dir.h" |
| #include "parse-options.h" |
| #include "run-command.h" |
| #include "sigchain.h" |
| #include "strbuf.h" |
| #include "string-list.h" |
| #include "strvec.h" |
| #include "midx.h" |
| #include "packfile.h" |
| #include "prune-packed.h" |
| #include "object-store.h" |
| #include "promisor-remote.h" |
| #include "shallow.h" |
| #include "pack.h" |
| #include "pack-bitmap.h" |
| #include "refs.h" |
| |
| #define ALL_INTO_ONE 1 |
| #define LOOSEN_UNREACHABLE 2 |
| #define PACK_CRUFT 4 |
| |
| #define DELETE_PACK 1 |
| #define CRUFT_PACK 2 |
| |
| static int pack_everything; |
| static int delta_base_offset = 1; |
| static int pack_kept_objects = -1; |
| static int write_bitmaps = -1; |
| static int use_delta_islands; |
| static int run_update_server_info = 1; |
| static char *packdir, *packtmp_name, *packtmp; |
| |
| static const char *const git_repack_usage[] = { |
| N_("git repack [<options>]"), |
| NULL |
| }; |
| |
| static const char incremental_bitmap_conflict_error[] = N_( |
| "Incremental repacks are incompatible with bitmap indexes. Use\n" |
| "--no-write-bitmap-index or disable the pack.writeBitmaps configuration." |
| ); |
| |
| struct pack_objects_args { |
| const char *window; |
| const char *window_memory; |
| const char *depth; |
| const char *threads; |
| const char *max_pack_size; |
| int no_reuse_delta; |
| int no_reuse_object; |
| int quiet; |
| int local; |
| }; |
| |
| static int repack_config(const char *var, const char *value, void *cb) |
| { |
| struct pack_objects_args *cruft_po_args = cb; |
| if (!strcmp(var, "repack.usedeltabaseoffset")) { |
| delta_base_offset = git_config_bool(var, value); |
| return 0; |
| } |
| if (!strcmp(var, "repack.packkeptobjects")) { |
| pack_kept_objects = git_config_bool(var, value); |
| return 0; |
| } |
| if (!strcmp(var, "repack.writebitmaps") || |
| !strcmp(var, "pack.writebitmaps")) { |
| write_bitmaps = git_config_bool(var, value); |
| return 0; |
| } |
| if (!strcmp(var, "repack.usedeltaislands")) { |
| use_delta_islands = git_config_bool(var, value); |
| return 0; |
| } |
| if (strcmp(var, "repack.updateserverinfo") == 0) { |
| run_update_server_info = git_config_bool(var, value); |
| return 0; |
| } |
| if (!strcmp(var, "repack.cruftwindow")) |
| return git_config_string(&cruft_po_args->window, var, value); |
| if (!strcmp(var, "repack.cruftwindowmemory")) |
| return git_config_string(&cruft_po_args->window_memory, var, value); |
| if (!strcmp(var, "repack.cruftdepth")) |
| return git_config_string(&cruft_po_args->depth, var, value); |
| if (!strcmp(var, "repack.cruftthreads")) |
| return git_config_string(&cruft_po_args->threads, var, value); |
| return git_default_config(var, value, cb); |
| } |
| |
| /* |
| * Adds all packs hex strings to either fname_nonkept_list or |
| * fname_kept_list based on whether each pack has a corresponding |
| * .keep file or not. Packs without a .keep file are not to be kept |
| * if we are going to pack everything into one file. |
| */ |
| static void collect_pack_filenames(struct string_list *fname_nonkept_list, |
| struct string_list *fname_kept_list, |
| const struct string_list *extra_keep) |
| { |
| DIR *dir; |
| struct dirent *e; |
| char *fname; |
| |
| if (!(dir = opendir(packdir))) |
| return; |
| |
| while ((e = readdir(dir)) != NULL) { |
| size_t len; |
| int i; |
| |
| if (!strip_suffix(e->d_name, ".pack", &len)) |
| continue; |
| |
| for (i = 0; i < extra_keep->nr; i++) |
| if (!fspathcmp(e->d_name, extra_keep->items[i].string)) |
| break; |
| |
| fname = xmemdupz(e->d_name, len); |
| |
| if ((extra_keep->nr > 0 && i < extra_keep->nr) || |
| (file_exists(mkpath("%s/%s.keep", packdir, fname)))) { |
| string_list_append_nodup(fname_kept_list, fname); |
| } else { |
| struct string_list_item *item; |
| item = string_list_append_nodup(fname_nonkept_list, |
| fname); |
| if (file_exists(mkpath("%s/%s.mtimes", packdir, fname))) |
| item->util = (void*)(uintptr_t)CRUFT_PACK; |
| } |
| } |
| closedir(dir); |
| |
| string_list_sort(fname_kept_list); |
| } |
| |
| static void remove_redundant_pack(const char *dir_name, const char *base_name) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| struct multi_pack_index *m = get_local_multi_pack_index(the_repository); |
| strbuf_addf(&buf, "%s.pack", base_name); |
| if (m && midx_contains_pack(m, buf.buf)) |
| clear_midx_file(the_repository); |
| strbuf_insertf(&buf, 0, "%s/", dir_name); |
| unlink_pack_path(buf.buf, 1); |
| strbuf_release(&buf); |
| } |
| |
| static void prepare_pack_objects(struct child_process *cmd, |
| const struct pack_objects_args *args, |
| const char *out) |
| { |
| strvec_push(&cmd->args, "pack-objects"); |
| if (args->window) |
| strvec_pushf(&cmd->args, "--window=%s", args->window); |
| if (args->window_memory) |
| strvec_pushf(&cmd->args, "--window-memory=%s", args->window_memory); |
| if (args->depth) |
| strvec_pushf(&cmd->args, "--depth=%s", args->depth); |
| if (args->threads) |
| strvec_pushf(&cmd->args, "--threads=%s", args->threads); |
| if (args->max_pack_size) |
| strvec_pushf(&cmd->args, "--max-pack-size=%s", args->max_pack_size); |
| if (args->no_reuse_delta) |
| strvec_pushf(&cmd->args, "--no-reuse-delta"); |
| if (args->no_reuse_object) |
| strvec_pushf(&cmd->args, "--no-reuse-object"); |
| if (args->local) |
| strvec_push(&cmd->args, "--local"); |
| if (args->quiet) |
| strvec_push(&cmd->args, "--quiet"); |
| if (delta_base_offset) |
| strvec_push(&cmd->args, "--delta-base-offset"); |
| strvec_push(&cmd->args, out); |
| cmd->git_cmd = 1; |
| cmd->out = -1; |
| } |
| |
| /* |
| * Write oid to the given struct child_process's stdin, starting it first if |
| * necessary. |
| */ |
| static int write_oid(const struct object_id *oid, struct packed_git *pack, |
| uint32_t pos, void *data) |
| { |
| struct child_process *cmd = data; |
| |
| if (cmd->in == -1) { |
| if (start_command(cmd)) |
| die(_("could not start pack-objects to repack promisor objects")); |
| } |
| |
| xwrite(cmd->in, oid_to_hex(oid), the_hash_algo->hexsz); |
| xwrite(cmd->in, "\n", 1); |
| return 0; |
| } |
| |
| static struct { |
| const char *name; |
| unsigned optional:1; |
| } exts[] = { |
| {".pack"}, |
| {".rev", 1}, |
| {".mtimes", 1}, |
| {".bitmap", 1}, |
| {".promisor", 1}, |
| {".idx"}, |
| }; |
| |
| struct generated_pack_data { |
| struct tempfile *tempfiles[ARRAY_SIZE(exts)]; |
| }; |
| |
| static struct generated_pack_data *populate_pack_exts(const char *name) |
| { |
| struct stat statbuf; |
| struct strbuf path = STRBUF_INIT; |
| struct generated_pack_data *data = xcalloc(1, sizeof(*data)); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(exts); i++) { |
| strbuf_reset(&path); |
| strbuf_addf(&path, "%s-%s%s", packtmp, name, exts[i].name); |
| |
| if (stat(path.buf, &statbuf)) |
| continue; |
| |
| data->tempfiles[i] = register_tempfile(path.buf); |
| } |
| |
| strbuf_release(&path); |
| return data; |
| } |
| |
| static void repack_promisor_objects(const struct pack_objects_args *args, |
| struct string_list *names) |
| { |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| FILE *out; |
| struct strbuf line = STRBUF_INIT; |
| |
| prepare_pack_objects(&cmd, args, packtmp); |
| cmd.in = -1; |
| |
| /* |
| * NEEDSWORK: Giving pack-objects only the OIDs without any ordering |
| * hints may result in suboptimal deltas in the resulting pack. See if |
| * the OIDs can be sent with fake paths such that pack-objects can use a |
| * {type -> existing pack order} ordering when computing deltas instead |
| * of a {type -> size} ordering, which may produce better deltas. |
| */ |
| for_each_packed_object(write_oid, &cmd, |
| FOR_EACH_OBJECT_PROMISOR_ONLY); |
| |
| if (cmd.in == -1) { |
| /* No packed objects; cmd was never started */ |
| child_process_clear(&cmd); |
| return; |
| } |
| |
| close(cmd.in); |
| |
| out = xfdopen(cmd.out, "r"); |
| while (strbuf_getline_lf(&line, out) != EOF) { |
| struct string_list_item *item; |
| char *promisor_name; |
| |
| if (line.len != the_hash_algo->hexsz) |
| die(_("repack: Expecting full hex object ID lines only from pack-objects.")); |
| item = string_list_append(names, line.buf); |
| |
| /* |
| * pack-objects creates the .pack and .idx files, but not the |
| * .promisor file. Create the .promisor file, which is empty. |
| * |
| * NEEDSWORK: fetch-pack sometimes generates non-empty |
| * .promisor files containing the ref names and associated |
| * hashes at the point of generation of the corresponding |
| * packfile, but this would not preserve their contents. Maybe |
| * concatenate the contents of all .promisor files instead of |
| * just creating a new empty file. |
| */ |
| promisor_name = mkpathdup("%s-%s.promisor", packtmp, |
| line.buf); |
| write_promisor_file(promisor_name, NULL, 0); |
| |
| item->util = populate_pack_exts(item->string); |
| |
| free(promisor_name); |
| } |
| fclose(out); |
| if (finish_command(&cmd)) |
| die(_("could not finish pack-objects to repack promisor objects")); |
| } |
| |
| struct pack_geometry { |
| struct packed_git **pack; |
| uint32_t pack_nr, pack_alloc; |
| uint32_t split; |
| }; |
| |
| static uint32_t geometry_pack_weight(struct packed_git *p) |
| { |
| if (open_pack_index(p)) |
| die(_("cannot open index for %s"), p->pack_name); |
| return p->num_objects; |
| } |
| |
| static int geometry_cmp(const void *va, const void *vb) |
| { |
| uint32_t aw = geometry_pack_weight(*(struct packed_git **)va), |
| bw = geometry_pack_weight(*(struct packed_git **)vb); |
| |
| if (aw < bw) |
| return -1; |
| if (aw > bw) |
| return 1; |
| return 0; |
| } |
| |
| static void init_pack_geometry(struct pack_geometry **geometry_p, |
| struct string_list *existing_kept_packs) |
| { |
| struct packed_git *p; |
| struct pack_geometry *geometry; |
| struct strbuf buf = STRBUF_INIT; |
| |
| *geometry_p = xcalloc(1, sizeof(struct pack_geometry)); |
| geometry = *geometry_p; |
| |
| for (p = get_all_packs(the_repository); p; p = p->next) { |
| if (!pack_kept_objects) { |
| /* |
| * Any pack that has its pack_keep bit set will appear |
| * in existing_kept_packs below, but this saves us from |
| * doing a more expensive check. |
| */ |
| if (p->pack_keep) |
| continue; |
| |
| /* |
| * The pack may be kept via the --keep-pack option; |
| * check 'existing_kept_packs' to determine whether to |
| * ignore it. |
| */ |
| strbuf_reset(&buf); |
| strbuf_addstr(&buf, pack_basename(p)); |
| strbuf_strip_suffix(&buf, ".pack"); |
| |
| if (string_list_has_string(existing_kept_packs, buf.buf)) |
| continue; |
| } |
| if (p->is_cruft) |
| continue; |
| |
| ALLOC_GROW(geometry->pack, |
| geometry->pack_nr + 1, |
| geometry->pack_alloc); |
| |
| geometry->pack[geometry->pack_nr] = p; |
| geometry->pack_nr++; |
| } |
| |
| QSORT(geometry->pack, geometry->pack_nr, geometry_cmp); |
| strbuf_release(&buf); |
| } |
| |
| static void split_pack_geometry(struct pack_geometry *geometry, int factor) |
| { |
| uint32_t i; |
| uint32_t split; |
| off_t total_size = 0; |
| |
| if (!geometry->pack_nr) { |
| geometry->split = geometry->pack_nr; |
| return; |
| } |
| |
| /* |
| * First, count the number of packs (in descending order of size) which |
| * already form a geometric progression. |
| */ |
| for (i = geometry->pack_nr - 1; i > 0; i--) { |
| struct packed_git *ours = geometry->pack[i]; |
| struct packed_git *prev = geometry->pack[i - 1]; |
| |
| if (unsigned_mult_overflows(factor, geometry_pack_weight(prev))) |
| die(_("pack %s too large to consider in geometric " |
| "progression"), |
| prev->pack_name); |
| |
| if (geometry_pack_weight(ours) < factor * geometry_pack_weight(prev)) |
| break; |
| } |
| |
| split = i; |
| |
| if (split) { |
| /* |
| * Move the split one to the right, since the top element in the |
| * last-compared pair can't be in the progression. Only do this |
| * when we split in the middle of the array (otherwise if we got |
| * to the end, then the split is in the right place). |
| */ |
| split++; |
| } |
| |
| /* |
| * Then, anything to the left of 'split' must be in a new pack. But, |
| * creating that new pack may cause packs in the heavy half to no longer |
| * form a geometric progression. |
| * |
| * Compute an expected size of the new pack, and then determine how many |
| * packs in the heavy half need to be joined into it (if any) to restore |
| * the geometric progression. |
| */ |
| for (i = 0; i < split; i++) { |
| struct packed_git *p = geometry->pack[i]; |
| |
| if (unsigned_add_overflows(total_size, geometry_pack_weight(p))) |
| die(_("pack %s too large to roll up"), p->pack_name); |
| total_size += geometry_pack_weight(p); |
| } |
| for (i = split; i < geometry->pack_nr; i++) { |
| struct packed_git *ours = geometry->pack[i]; |
| |
| if (unsigned_mult_overflows(factor, total_size)) |
| die(_("pack %s too large to roll up"), ours->pack_name); |
| |
| if (geometry_pack_weight(ours) < factor * total_size) { |
| if (unsigned_add_overflows(total_size, |
| geometry_pack_weight(ours))) |
| die(_("pack %s too large to roll up"), |
| ours->pack_name); |
| |
| split++; |
| total_size += geometry_pack_weight(ours); |
| } else |
| break; |
| } |
| |
| geometry->split = split; |
| } |
| |
| static struct packed_git *get_largest_active_pack(struct pack_geometry *geometry) |
| { |
| if (!geometry) { |
| /* |
| * No geometry means either an all-into-one repack (in which |
| * case there is only one pack left and it is the largest) or an |
| * incremental one. |
| * |
| * If repacking incrementally, then we could check the size of |
| * all packs to determine which should be preferred, but leave |
| * this for later. |
| */ |
| return NULL; |
| } |
| if (geometry->split == geometry->pack_nr) |
| return NULL; |
| return geometry->pack[geometry->pack_nr - 1]; |
| } |
| |
| static void clear_pack_geometry(struct pack_geometry *geometry) |
| { |
| if (!geometry) |
| return; |
| |
| free(geometry->pack); |
| geometry->pack_nr = 0; |
| geometry->pack_alloc = 0; |
| geometry->split = 0; |
| } |
| |
| struct midx_snapshot_ref_data { |
| struct tempfile *f; |
| struct oidset seen; |
| int preferred; |
| }; |
| |
| static int midx_snapshot_ref_one(const char *refname UNUSED, |
| const struct object_id *oid, |
| int flag UNUSED, void *_data) |
| { |
| struct midx_snapshot_ref_data *data = _data; |
| struct object_id peeled; |
| |
| if (!peel_iterated_oid(oid, &peeled)) |
| oid = &peeled; |
| |
| if (oidset_insert(&data->seen, oid)) |
| return 0; /* already seen */ |
| |
| if (oid_object_info(the_repository, oid, NULL) != OBJ_COMMIT) |
| return 0; |
| |
| fprintf(data->f->fp, "%s%s\n", data->preferred ? "+" : "", |
| oid_to_hex(oid)); |
| |
| return 0; |
| } |
| |
| static void midx_snapshot_refs(struct tempfile *f) |
| { |
| struct midx_snapshot_ref_data data; |
| const struct string_list *preferred = bitmap_preferred_tips(the_repository); |
| |
| data.f = f; |
| data.preferred = 0; |
| oidset_init(&data.seen, 0); |
| |
| if (!fdopen_tempfile(f, "w")) |
| die(_("could not open tempfile %s for writing"), |
| get_tempfile_path(f)); |
| |
| if (preferred) { |
| struct string_list_item *item; |
| |
| data.preferred = 1; |
| for_each_string_list_item(item, preferred) |
| for_each_ref_in(item->string, midx_snapshot_ref_one, &data); |
| data.preferred = 0; |
| } |
| |
| for_each_ref(midx_snapshot_ref_one, &data); |
| |
| if (close_tempfile_gently(f)) { |
| int save_errno = errno; |
| delete_tempfile(&f); |
| errno = save_errno; |
| die_errno(_("could not close refs snapshot tempfile")); |
| } |
| |
| oidset_clear(&data.seen); |
| } |
| |
| static void midx_included_packs(struct string_list *include, |
| struct string_list *existing_nonkept_packs, |
| struct string_list *existing_kept_packs, |
| struct string_list *names, |
| struct pack_geometry *geometry) |
| { |
| struct string_list_item *item; |
| |
| for_each_string_list_item(item, existing_kept_packs) |
| string_list_insert(include, xstrfmt("%s.idx", item->string)); |
| for_each_string_list_item(item, names) |
| string_list_insert(include, xstrfmt("pack-%s.idx", item->string)); |
| if (geometry) { |
| struct strbuf buf = STRBUF_INIT; |
| uint32_t i; |
| for (i = geometry->split; i < geometry->pack_nr; i++) { |
| struct packed_git *p = geometry->pack[i]; |
| |
| strbuf_addstr(&buf, pack_basename(p)); |
| strbuf_strip_suffix(&buf, ".pack"); |
| strbuf_addstr(&buf, ".idx"); |
| |
| string_list_insert(include, strbuf_detach(&buf, NULL)); |
| } |
| |
| for_each_string_list_item(item, existing_nonkept_packs) { |
| if (!((uintptr_t)item->util & CRUFT_PACK)) { |
| /* |
| * no need to check DELETE_PACK, since we're not |
| * doing an ALL_INTO_ONE repack |
| */ |
| continue; |
| } |
| string_list_insert(include, xstrfmt("%s.idx", item->string)); |
| } |
| } else { |
| for_each_string_list_item(item, existing_nonkept_packs) { |
| if ((uintptr_t)item->util & DELETE_PACK) |
| continue; |
| string_list_insert(include, xstrfmt("%s.idx", item->string)); |
| } |
| } |
| } |
| |
| static int write_midx_included_packs(struct string_list *include, |
| struct pack_geometry *geometry, |
| const char *refs_snapshot, |
| int show_progress, int write_bitmaps) |
| { |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| struct string_list_item *item; |
| struct packed_git *largest = get_largest_active_pack(geometry); |
| FILE *in; |
| int ret; |
| |
| if (!include->nr) |
| return 0; |
| |
| cmd.in = -1; |
| cmd.git_cmd = 1; |
| |
| strvec_push(&cmd.args, "multi-pack-index"); |
| strvec_pushl(&cmd.args, "write", "--stdin-packs", NULL); |
| |
| if (show_progress) |
| strvec_push(&cmd.args, "--progress"); |
| else |
| strvec_push(&cmd.args, "--no-progress"); |
| |
| if (write_bitmaps) |
| strvec_push(&cmd.args, "--bitmap"); |
| |
| if (largest) |
| strvec_pushf(&cmd.args, "--preferred-pack=%s", |
| pack_basename(largest)); |
| |
| if (refs_snapshot) |
| strvec_pushf(&cmd.args, "--refs-snapshot=%s", refs_snapshot); |
| |
| ret = start_command(&cmd); |
| if (ret) |
| return ret; |
| |
| in = xfdopen(cmd.in, "w"); |
| for_each_string_list_item(item, include) |
| fprintf(in, "%s\n", item->string); |
| fclose(in); |
| |
| return finish_command(&cmd); |
| } |
| |
| static void remove_redundant_bitmaps(struct string_list *include, |
| const char *packdir) |
| { |
| struct strbuf path = STRBUF_INIT; |
| struct string_list_item *item; |
| size_t packdir_len; |
| |
| strbuf_addstr(&path, packdir); |
| strbuf_addch(&path, '/'); |
| packdir_len = path.len; |
| |
| /* |
| * Remove any pack bitmaps corresponding to packs which are now |
| * included in the MIDX. |
| */ |
| for_each_string_list_item(item, include) { |
| strbuf_addstr(&path, item->string); |
| strbuf_strip_suffix(&path, ".idx"); |
| strbuf_addstr(&path, ".bitmap"); |
| |
| if (unlink(path.buf) && errno != ENOENT) |
| warning_errno(_("could not remove stale bitmap: %s"), |
| path.buf); |
| |
| strbuf_setlen(&path, packdir_len); |
| } |
| strbuf_release(&path); |
| } |
| |
| static int write_cruft_pack(const struct pack_objects_args *args, |
| const char *destination, |
| const char *pack_prefix, |
| const char *cruft_expiration, |
| struct string_list *names, |
| struct string_list *existing_packs, |
| struct string_list *existing_kept_packs) |
| { |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| struct strbuf line = STRBUF_INIT; |
| struct string_list_item *item; |
| FILE *in, *out; |
| int ret; |
| const char *scratch; |
| int local = skip_prefix(destination, packdir, &scratch); |
| |
| prepare_pack_objects(&cmd, args, destination); |
| |
| strvec_push(&cmd.args, "--cruft"); |
| if (cruft_expiration) |
| strvec_pushf(&cmd.args, "--cruft-expiration=%s", |
| cruft_expiration); |
| |
| strvec_push(&cmd.args, "--honor-pack-keep"); |
| strvec_push(&cmd.args, "--non-empty"); |
| strvec_push(&cmd.args, "--max-pack-size=0"); |
| |
| cmd.in = -1; |
| |
| ret = start_command(&cmd); |
| if (ret) |
| return ret; |
| |
| /* |
| * names has a confusing double use: it both provides the list |
| * of just-written new packs, and accepts the name of the cruft |
| * pack we are writing. |
| * |
| * By the time it is read here, it contains only the pack(s) |
| * that were just written, which is exactly the set of packs we |
| * want to consider kept. |
| * |
| * If `--expire-to` is given, the double-use served by `names` |
| * ensures that the pack written to `--expire-to` excludes any |
| * objects contained in the cruft pack. |
| */ |
| in = xfdopen(cmd.in, "w"); |
| for_each_string_list_item(item, names) |
| fprintf(in, "%s-%s.pack\n", pack_prefix, item->string); |
| for_each_string_list_item(item, existing_packs) |
| fprintf(in, "-%s.pack\n", item->string); |
| for_each_string_list_item(item, existing_kept_packs) |
| fprintf(in, "%s.pack\n", item->string); |
| fclose(in); |
| |
| out = xfdopen(cmd.out, "r"); |
| while (strbuf_getline_lf(&line, out) != EOF) { |
| struct string_list_item *item; |
| |
| if (line.len != the_hash_algo->hexsz) |
| die(_("repack: Expecting full hex object ID lines only " |
| "from pack-objects.")); |
| /* |
| * avoid putting packs written outside of the repository in the |
| * list of names |
| */ |
| if (local) { |
| item = string_list_append(names, line.buf); |
| item->util = populate_pack_exts(line.buf); |
| } |
| } |
| fclose(out); |
| |
| strbuf_release(&line); |
| |
| return finish_command(&cmd); |
| } |
| |
| int cmd_repack(int argc, const char **argv, const char *prefix) |
| { |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| struct string_list_item *item; |
| struct string_list names = STRING_LIST_INIT_DUP; |
| struct string_list existing_nonkept_packs = STRING_LIST_INIT_DUP; |
| struct string_list existing_kept_packs = STRING_LIST_INIT_DUP; |
| struct pack_geometry *geometry = NULL; |
| struct strbuf line = STRBUF_INIT; |
| struct tempfile *refs_snapshot = NULL; |
| int i, ext, ret; |
| FILE *out; |
| int show_progress; |
| |
| /* variables to be filled by option parsing */ |
| int delete_redundant = 0; |
| const char *unpack_unreachable = NULL; |
| int keep_unreachable = 0; |
| struct string_list keep_pack_list = STRING_LIST_INIT_NODUP; |
| struct pack_objects_args po_args = {NULL}; |
| struct pack_objects_args cruft_po_args = {NULL}; |
| int geometric_factor = 0; |
| int write_midx = 0; |
| const char *cruft_expiration = NULL; |
| const char *expire_to = NULL; |
| |
| struct option builtin_repack_options[] = { |
| OPT_BIT('a', NULL, &pack_everything, |
| N_("pack everything in a single pack"), ALL_INTO_ONE), |
| OPT_BIT('A', NULL, &pack_everything, |
| N_("same as -a, and turn unreachable objects loose"), |
| LOOSEN_UNREACHABLE | ALL_INTO_ONE), |
| OPT_BIT(0, "cruft", &pack_everything, |
| N_("same as -a, pack unreachable cruft objects separately"), |
| PACK_CRUFT), |
| OPT_STRING(0, "cruft-expiration", &cruft_expiration, N_("approxidate"), |
| N_("with -C, expire objects older than this")), |
| OPT_BOOL('d', NULL, &delete_redundant, |
| N_("remove redundant packs, and run git-prune-packed")), |
| OPT_BOOL('f', NULL, &po_args.no_reuse_delta, |
| N_("pass --no-reuse-delta to git-pack-objects")), |
| OPT_BOOL('F', NULL, &po_args.no_reuse_object, |
| N_("pass --no-reuse-object to git-pack-objects")), |
| OPT_NEGBIT('n', NULL, &run_update_server_info, |
| N_("do not run git-update-server-info"), 1), |
| OPT__QUIET(&po_args.quiet, N_("be quiet")), |
| OPT_BOOL('l', "local", &po_args.local, |
| N_("pass --local to git-pack-objects")), |
| OPT_BOOL('b', "write-bitmap-index", &write_bitmaps, |
| N_("write bitmap index")), |
| OPT_BOOL('i', "delta-islands", &use_delta_islands, |
| N_("pass --delta-islands to git-pack-objects")), |
| OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"), |
| N_("with -A, do not loosen objects older than this")), |
| OPT_BOOL('k', "keep-unreachable", &keep_unreachable, |
| N_("with -a, repack unreachable objects")), |
| OPT_STRING(0, "window", &po_args.window, N_("n"), |
| N_("size of the window used for delta compression")), |
| OPT_STRING(0, "window-memory", &po_args.window_memory, N_("bytes"), |
| N_("same as the above, but limit memory size instead of entries count")), |
| OPT_STRING(0, "depth", &po_args.depth, N_("n"), |
| N_("limits the maximum delta depth")), |
| OPT_STRING(0, "threads", &po_args.threads, N_("n"), |
| N_("limits the maximum number of threads")), |
| OPT_STRING(0, "max-pack-size", &po_args.max_pack_size, N_("bytes"), |
| N_("maximum size of each packfile")), |
| OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects, |
| N_("repack objects in packs marked with .keep")), |
| OPT_STRING_LIST(0, "keep-pack", &keep_pack_list, N_("name"), |
| N_("do not repack this pack")), |
| OPT_INTEGER('g', "geometric", &geometric_factor, |
| N_("find a geometric progression with factor <N>")), |
| OPT_BOOL('m', "write-midx", &write_midx, |
| N_("write a multi-pack index of the resulting packs")), |
| OPT_STRING(0, "expire-to", &expire_to, N_("dir"), |
| N_("pack prefix to store a pack containing pruned objects")), |
| OPT_END() |
| }; |
| |
| git_config(repack_config, &cruft_po_args); |
| |
| argc = parse_options(argc, argv, prefix, builtin_repack_options, |
| git_repack_usage, 0); |
| |
| if (delete_redundant && repository_format_precious_objects) |
| die(_("cannot delete packs in a precious-objects repo")); |
| |
| if (keep_unreachable && |
| (unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE))) |
| die(_("options '%s' and '%s' cannot be used together"), "--keep-unreachable", "-A"); |
| |
| if (pack_everything & PACK_CRUFT) { |
| pack_everything |= ALL_INTO_ONE; |
| |
| if (unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE)) |
| die(_("options '%s' and '%s' cannot be used together"), "--cruft", "-A"); |
| if (keep_unreachable) |
| die(_("options '%s' and '%s' cannot be used together"), "--cruft", "-k"); |
| } |
| |
| if (write_bitmaps < 0) { |
| 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; |
| |
| if (write_bitmaps && !(pack_everything & ALL_INTO_ONE) && !write_midx) |
| die(_(incremental_bitmap_conflict_error)); |
| |
| if (write_midx && write_bitmaps) { |
| struct strbuf path = STRBUF_INIT; |
| |
| strbuf_addf(&path, "%s/%s_XXXXXX", get_object_directory(), |
| "bitmap-ref-tips"); |
| |
| refs_snapshot = xmks_tempfile(path.buf); |
| midx_snapshot_refs(refs_snapshot); |
| |
| strbuf_release(&path); |
| } |
| |
| packdir = mkpathdup("%s/pack", get_object_directory()); |
| packtmp_name = xstrfmt(".tmp-%d-pack", (int)getpid()); |
| packtmp = mkpathdup("%s/%s", packdir, packtmp_name); |
| |
| collect_pack_filenames(&existing_nonkept_packs, &existing_kept_packs, |
| &keep_pack_list); |
| |
| if (geometric_factor) { |
| if (pack_everything) |
| die(_("options '%s' and '%s' cannot be used together"), "--geometric", "-A/-a"); |
| init_pack_geometry(&geometry, &existing_kept_packs); |
| split_pack_geometry(geometry, geometric_factor); |
| } |
| |
| prepare_pack_objects(&cmd, &po_args, packtmp); |
| |
| show_progress = !po_args.quiet && isatty(2); |
| |
| strvec_push(&cmd.args, "--keep-true-parents"); |
| if (!pack_kept_objects) |
| strvec_push(&cmd.args, "--honor-pack-keep"); |
| for (i = 0; i < keep_pack_list.nr; i++) |
| strvec_pushf(&cmd.args, "--keep-pack=%s", |
| keep_pack_list.items[i].string); |
| strvec_push(&cmd.args, "--non-empty"); |
| if (!geometry) { |
| /* |
| * We need to grab all reachable objects, including those that |
| * are reachable from reflogs and the index. |
| * |
| * When repacking into a geometric progression of packs, |
| * however, we ask 'git pack-objects --stdin-packs', and it is |
| * not about packing objects based on reachability but about |
| * repacking all the objects in specified packs and loose ones |
| * (indeed, --stdin-packs is incompatible with these options). |
| */ |
| strvec_push(&cmd.args, "--all"); |
| strvec_push(&cmd.args, "--reflog"); |
| strvec_push(&cmd.args, "--indexed-objects"); |
| } |
| if (has_promisor_remote()) |
| strvec_push(&cmd.args, "--exclude-promisor-objects"); |
| if (!write_midx) { |
| if (write_bitmaps > 0) |
| strvec_push(&cmd.args, "--write-bitmap-index"); |
| else if (write_bitmaps < 0) |
| strvec_push(&cmd.args, "--write-bitmap-index-quiet"); |
| } |
| if (use_delta_islands) |
| strvec_push(&cmd.args, "--delta-islands"); |
| |
| if (pack_everything & ALL_INTO_ONE) { |
| repack_promisor_objects(&po_args, &names); |
| |
| if (existing_nonkept_packs.nr && delete_redundant && |
| !(pack_everything & PACK_CRUFT)) { |
| for_each_string_list_item(item, &names) { |
| strvec_pushf(&cmd.args, "--keep-pack=%s-%s.pack", |
| packtmp_name, item->string); |
| } |
| if (unpack_unreachable) { |
| strvec_pushf(&cmd.args, |
| "--unpack-unreachable=%s", |
| unpack_unreachable); |
| } else if (pack_everything & LOOSEN_UNREACHABLE) { |
| strvec_push(&cmd.args, |
| "--unpack-unreachable"); |
| } else if (keep_unreachable) { |
| strvec_push(&cmd.args, "--keep-unreachable"); |
| strvec_push(&cmd.args, "--pack-loose-unreachable"); |
| } |
| } |
| } else if (geometry) { |
| strvec_push(&cmd.args, "--stdin-packs"); |
| strvec_push(&cmd.args, "--unpacked"); |
| } else { |
| strvec_push(&cmd.args, "--unpacked"); |
| strvec_push(&cmd.args, "--incremental"); |
| } |
| |
| if (geometry) |
| cmd.in = -1; |
| else |
| cmd.no_stdin = 1; |
| |
| ret = start_command(&cmd); |
| if (ret) |
| goto cleanup; |
| |
| if (geometry) { |
| FILE *in = xfdopen(cmd.in, "w"); |
| /* |
| * The resulting pack should contain all objects in packs that |
| * are going to be rolled up, but exclude objects in packs which |
| * are being left alone. |
| */ |
| for (i = 0; i < geometry->split; i++) |
| fprintf(in, "%s\n", pack_basename(geometry->pack[i])); |
| for (i = geometry->split; i < geometry->pack_nr; i++) |
| fprintf(in, "^%s\n", pack_basename(geometry->pack[i])); |
| fclose(in); |
| } |
| |
| out = xfdopen(cmd.out, "r"); |
| while (strbuf_getline_lf(&line, out) != EOF) { |
| struct string_list_item *item; |
| |
| if (line.len != the_hash_algo->hexsz) |
| die(_("repack: Expecting full hex object ID lines only from pack-objects.")); |
| item = string_list_append(&names, line.buf); |
| item->util = populate_pack_exts(item->string); |
| } |
| strbuf_release(&line); |
| fclose(out); |
| ret = finish_command(&cmd); |
| if (ret) |
| goto cleanup; |
| |
| if (!names.nr && !po_args.quiet) |
| printf_ln(_("Nothing new to pack.")); |
| |
| if (pack_everything & PACK_CRUFT) { |
| const char *pack_prefix; |
| if (!skip_prefix(packtmp, packdir, &pack_prefix)) |
| die(_("pack prefix %s does not begin with objdir %s"), |
| packtmp, packdir); |
| if (*pack_prefix == '/') |
| pack_prefix++; |
| |
| if (!cruft_po_args.window) |
| cruft_po_args.window = po_args.window; |
| if (!cruft_po_args.window_memory) |
| cruft_po_args.window_memory = po_args.window_memory; |
| if (!cruft_po_args.depth) |
| cruft_po_args.depth = po_args.depth; |
| if (!cruft_po_args.threads) |
| cruft_po_args.threads = po_args.threads; |
| |
| cruft_po_args.local = po_args.local; |
| cruft_po_args.quiet = po_args.quiet; |
| |
| ret = write_cruft_pack(&cruft_po_args, packtmp, pack_prefix, |
| cruft_expiration, &names, |
| &existing_nonkept_packs, |
| &existing_kept_packs); |
| if (ret) |
| goto cleanup; |
| |
| if (delete_redundant && expire_to) { |
| /* |
| * If `--expire-to` is given with `-d`, it's possible |
| * that we're about to prune some objects. With cruft |
| * packs, pruning is implicit: any objects from existing |
| * packs that weren't picked up by new packs are removed |
| * when their packs are deleted. |
| * |
| * Generate an additional cruft pack, with one twist: |
| * `names` now includes the name of the cruft pack |
| * written in the previous step. So the contents of |
| * _this_ cruft pack exclude everything contained in the |
| * existing cruft pack (that is, all of the unreachable |
| * objects which are no older than |
| * `--cruft-expiration`). |
| * |
| * To make this work, cruft_expiration must become NULL |
| * so that this cruft pack doesn't actually prune any |
| * objects. If it were non-NULL, this call would always |
| * generate an empty pack (since every object not in the |
| * cruft pack generated above will have an mtime older |
| * than the expiration). |
| */ |
| ret = write_cruft_pack(&cruft_po_args, expire_to, |
| pack_prefix, |
| NULL, |
| &names, |
| &existing_nonkept_packs, |
| &existing_kept_packs); |
| if (ret) |
| goto cleanup; |
| } |
| } |
| |
| string_list_sort(&names); |
| |
| close_object_store(the_repository->objects); |
| |
| /* |
| * Ok we have prepared all new packfiles. |
| */ |
| for_each_string_list_item(item, &names) { |
| struct generated_pack_data *data = item->util; |
| |
| for (ext = 0; ext < ARRAY_SIZE(exts); ext++) { |
| char *fname; |
| |
| fname = mkpathdup("%s/pack-%s%s", |
| packdir, item->string, exts[ext].name); |
| |
| if (data->tempfiles[ext]) { |
| const char *fname_old = get_tempfile_path(data->tempfiles[ext]); |
| struct stat statbuffer; |
| |
| if (!stat(fname_old, &statbuffer)) { |
| statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); |
| chmod(fname_old, statbuffer.st_mode); |
| } |
| |
| if (rename_tempfile(&data->tempfiles[ext], fname)) |
| die_errno(_("renaming pack to '%s' failed"), fname); |
| } else if (!exts[ext].optional) |
| die(_("pack-objects did not write a '%s' file for pack %s-%s"), |
| exts[ext].name, packtmp, item->string); |
| else if (unlink(fname) < 0 && errno != ENOENT) |
| die_errno(_("could not unlink: %s"), fname); |
| |
| free(fname); |
| } |
| } |
| /* End of pack replacement. */ |
| |
| if (delete_redundant && pack_everything & ALL_INTO_ONE) { |
| const int hexsz = the_hash_algo->hexsz; |
| for_each_string_list_item(item, &existing_nonkept_packs) { |
| char *sha1; |
| size_t len = strlen(item->string); |
| if (len < hexsz) |
| continue; |
| sha1 = item->string + len - hexsz; |
| /* |
| * Mark this pack for deletion, which ensures that this |
| * pack won't be included in a MIDX (if `--write-midx` |
| * was given) and that we will actually delete this pack |
| * (if `-d` was given). |
| */ |
| if (!string_list_has_string(&names, sha1)) |
| item->util = (void*)(uintptr_t)((size_t)item->util | DELETE_PACK); |
| } |
| } |
| |
| if (write_midx) { |
| struct string_list include = STRING_LIST_INIT_NODUP; |
| midx_included_packs(&include, &existing_nonkept_packs, |
| &existing_kept_packs, &names, geometry); |
| |
| ret = write_midx_included_packs(&include, geometry, |
| refs_snapshot ? get_tempfile_path(refs_snapshot) : NULL, |
| show_progress, write_bitmaps > 0); |
| |
| if (!ret && write_bitmaps) |
| remove_redundant_bitmaps(&include, packdir); |
| |
| string_list_clear(&include, 0); |
| |
| if (ret) |
| goto cleanup; |
| } |
| |
| reprepare_packed_git(the_repository); |
| |
| if (delete_redundant) { |
| int opts = 0; |
| for_each_string_list_item(item, &existing_nonkept_packs) { |
| if (!((uintptr_t)item->util & DELETE_PACK)) |
| continue; |
| remove_redundant_pack(packdir, item->string); |
| } |
| |
| if (geometry) { |
| struct strbuf buf = STRBUF_INIT; |
| |
| uint32_t i; |
| for (i = 0; i < geometry->split; i++) { |
| struct packed_git *p = geometry->pack[i]; |
| if (string_list_has_string(&names, |
| hash_to_hex(p->hash))) |
| continue; |
| |
| strbuf_reset(&buf); |
| strbuf_addstr(&buf, pack_basename(p)); |
| strbuf_strip_suffix(&buf, ".pack"); |
| |
| if ((p->pack_keep) || |
| (string_list_has_string(&existing_kept_packs, |
| buf.buf))) |
| continue; |
| |
| remove_redundant_pack(packdir, buf.buf); |
| } |
| strbuf_release(&buf); |
| } |
| if (show_progress) |
| opts |= PRUNE_PACKED_VERBOSE; |
| prune_packed_objects(opts); |
| |
| if (!keep_unreachable && |
| (!(pack_everything & LOOSEN_UNREACHABLE) || |
| unpack_unreachable) && |
| is_repository_shallow(the_repository)) |
| prune_shallow(PRUNE_QUICK); |
| } |
| |
| if (run_update_server_info) |
| update_server_info(0); |
| |
| 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; |
| write_midx_file(get_object_directory(), NULL, NULL, flags); |
| } |
| |
| cleanup: |
| string_list_clear(&names, 1); |
| string_list_clear(&existing_nonkept_packs, 0); |
| string_list_clear(&existing_kept_packs, 0); |
| clear_pack_geometry(geometry); |
| |
| return ret; |
| } |