| #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 "argv-array.h" |
| #include "midx.h" |
| #include "packfile.h" |
| #include "object-store.h" |
| |
| static int delta_base_offset = 1; |
| static int pack_kept_objects = -1; |
| static int write_bitmaps = -1; |
| static int use_delta_islands; |
| static char *packdir, *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." |
| ); |
| |
| |
| static int repack_config(const char *var, const char *value, void *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; |
| } |
| return git_default_config(var, value, cb); |
| } |
| |
| /* |
| * Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files. |
| */ |
| static void remove_temporary_files(void) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| size_t dirlen, prefixlen; |
| DIR *dir; |
| struct dirent *e; |
| |
| dir = opendir(packdir); |
| if (!dir) |
| return; |
| |
| /* Point at the slash at the end of ".../objects/pack/" */ |
| dirlen = strlen(packdir) + 1; |
| strbuf_addstr(&buf, packtmp); |
| /* Hold the length of ".tmp-%d-pack-" */ |
| prefixlen = buf.len - dirlen; |
| |
| while ((e = readdir(dir))) { |
| if (strncmp(e->d_name, buf.buf + dirlen, prefixlen)) |
| continue; |
| strbuf_setlen(&buf, dirlen); |
| strbuf_addstr(&buf, e->d_name); |
| unlink(buf.buf); |
| } |
| closedir(dir); |
| strbuf_release(&buf); |
| } |
| |
| static void remove_pack_on_signal(int signo) |
| { |
| remove_temporary_files(); |
| sigchain_pop(signo); |
| raise(signo); |
| } |
| |
| /* |
| * Adds all packs hex strings to the fname list, which do not |
| * have a corresponding .keep file. These packs are not to |
| * be kept if we are going to pack everything into one file. |
| */ |
| static void get_non_kept_pack_filenames(struct string_list *fname_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; |
| |
| for (i = 0; i < extra_keep->nr; i++) |
| if (!fspathcmp(e->d_name, extra_keep->items[i].string)) |
| break; |
| if (extra_keep->nr > 0 && i < extra_keep->nr) |
| continue; |
| |
| if (!strip_suffix(e->d_name, ".pack", &len)) |
| continue; |
| |
| fname = xmemdupz(e->d_name, len); |
| |
| if (!file_exists(mkpath("%s/%s.keep", packdir, fname))) |
| string_list_append_nodup(fname_list, fname); |
| else |
| free(fname); |
| } |
| closedir(dir); |
| } |
| |
| static void remove_redundant_pack(const char *dir_name, const char *base_name) |
| { |
| const char *exts[] = {".pack", ".idx", ".keep", ".bitmap", ".promisor"}; |
| int i; |
| struct strbuf buf = STRBUF_INIT; |
| size_t plen; |
| |
| strbuf_addf(&buf, "%s/%s", dir_name, base_name); |
| plen = buf.len; |
| |
| for (i = 0; i < ARRAY_SIZE(exts); i++) { |
| strbuf_setlen(&buf, plen); |
| strbuf_addstr(&buf, exts[i]); |
| unlink(buf.buf); |
| } |
| strbuf_release(&buf); |
| } |
| |
| 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 void prepare_pack_objects(struct child_process *cmd, |
| const struct pack_objects_args *args) |
| { |
| argv_array_push(&cmd->args, "pack-objects"); |
| if (args->window) |
| argv_array_pushf(&cmd->args, "--window=%s", args->window); |
| if (args->window_memory) |
| argv_array_pushf(&cmd->args, "--window-memory=%s", args->window_memory); |
| if (args->depth) |
| argv_array_pushf(&cmd->args, "--depth=%s", args->depth); |
| if (args->threads) |
| argv_array_pushf(&cmd->args, "--threads=%s", args->threads); |
| if (args->max_pack_size) |
| argv_array_pushf(&cmd->args, "--max-pack-size=%s", args->max_pack_size); |
| if (args->no_reuse_delta) |
| argv_array_pushf(&cmd->args, "--no-reuse-delta"); |
| if (args->no_reuse_object) |
| argv_array_pushf(&cmd->args, "--no-reuse-object"); |
| if (args->local) |
| argv_array_push(&cmd->args, "--local"); |
| if (args->quiet) |
| argv_array_push(&cmd->args, "--quiet"); |
| if (delta_base_offset) |
| argv_array_push(&cmd->args, "--delta-base-offset"); |
| argv_array_push(&cmd->args, packtmp); |
| 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), GIT_SHA1_HEXSZ); |
| xwrite(cmd->in, "\n", 1); |
| return 0; |
| } |
| |
| 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); |
| 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 */ |
| return; |
| |
| close(cmd.in); |
| |
| out = xfdopen(cmd.out, "r"); |
| while (strbuf_getline_lf(&line, out) != EOF) { |
| char *promisor_name; |
| int fd; |
| if (line.len != the_hash_algo->hexsz) |
| die(_("repack: Expecting full hex object ID lines only from pack-objects.")); |
| 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. |
| */ |
| promisor_name = mkpathdup("%s-%s.promisor", packtmp, |
| line.buf); |
| fd = open(promisor_name, O_CREAT|O_EXCL|O_WRONLY, 0600); |
| if (fd < 0) |
| die_errno(_("unable to create '%s'"), promisor_name); |
| close(fd); |
| free(promisor_name); |
| } |
| fclose(out); |
| if (finish_command(&cmd)) |
| die(_("could not finish pack-objects to repack promisor objects")); |
| } |
| |
| #define ALL_INTO_ONE 1 |
| #define LOOSEN_UNREACHABLE 2 |
| |
| int cmd_repack(int argc, const char **argv, const char *prefix) |
| { |
| struct { |
| const char *name; |
| unsigned optional:1; |
| } exts[] = { |
| {".pack"}, |
| {".idx"}, |
| {".bitmap", 1}, |
| {".promisor", 1}, |
| }; |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| struct string_list_item *item; |
| struct string_list names = STRING_LIST_INIT_DUP; |
| struct string_list rollback = STRING_LIST_INIT_NODUP; |
| struct string_list existing_packs = STRING_LIST_INIT_DUP; |
| struct strbuf line = STRBUF_INIT; |
| int i, ext, ret, failed; |
| FILE *out; |
| |
| /* variables to be filled by option parsing */ |
| int pack_everything = 0; |
| int delete_redundant = 0; |
| const char *unpack_unreachable = NULL; |
| int keep_unreachable = 0; |
| struct string_list keep_pack_list = STRING_LIST_INIT_NODUP; |
| int no_update_server_info = 0; |
| int midx_cleared = 0; |
| struct pack_objects_args po_args = {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_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_BOOL('n', NULL, &no_update_server_info, |
| N_("do not run git-update-server-info")), |
| 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_END() |
| }; |
| |
| git_config(repack_config, NULL); |
| |
| 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(_("--keep-unreachable and -A are incompatible")); |
| |
| if (write_bitmaps < 0) |
| write_bitmaps = (pack_everything & ALL_INTO_ONE) && |
| is_bare_repository(); |
| if (pack_kept_objects < 0) |
| pack_kept_objects = write_bitmaps; |
| |
| if (write_bitmaps && !(pack_everything & ALL_INTO_ONE)) |
| die(_(incremental_bitmap_conflict_error)); |
| |
| packdir = mkpathdup("%s/pack", get_object_directory()); |
| packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid()); |
| |
| sigchain_push_common(remove_pack_on_signal); |
| |
| prepare_pack_objects(&cmd, &po_args); |
| |
| argv_array_push(&cmd.args, "--keep-true-parents"); |
| if (!pack_kept_objects) |
| argv_array_push(&cmd.args, "--honor-pack-keep"); |
| for (i = 0; i < keep_pack_list.nr; i++) |
| argv_array_pushf(&cmd.args, "--keep-pack=%s", |
| keep_pack_list.items[i].string); |
| argv_array_push(&cmd.args, "--non-empty"); |
| argv_array_push(&cmd.args, "--all"); |
| argv_array_push(&cmd.args, "--reflog"); |
| argv_array_push(&cmd.args, "--indexed-objects"); |
| if (repository_format_partial_clone) |
| argv_array_push(&cmd.args, "--exclude-promisor-objects"); |
| if (write_bitmaps) |
| argv_array_push(&cmd.args, "--write-bitmap-index"); |
| if (use_delta_islands) |
| argv_array_push(&cmd.args, "--delta-islands"); |
| |
| if (pack_everything & ALL_INTO_ONE) { |
| get_non_kept_pack_filenames(&existing_packs, &keep_pack_list); |
| |
| repack_promisor_objects(&po_args, &names); |
| |
| if (existing_packs.nr && delete_redundant) { |
| if (unpack_unreachable) { |
| argv_array_pushf(&cmd.args, |
| "--unpack-unreachable=%s", |
| unpack_unreachable); |
| argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1"); |
| } else if (pack_everything & LOOSEN_UNREACHABLE) { |
| argv_array_push(&cmd.args, |
| "--unpack-unreachable"); |
| } else if (keep_unreachable) { |
| argv_array_push(&cmd.args, "--keep-unreachable"); |
| argv_array_push(&cmd.args, "--pack-loose-unreachable"); |
| } else { |
| argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1"); |
| } |
| } |
| } else { |
| argv_array_push(&cmd.args, "--unpacked"); |
| argv_array_push(&cmd.args, "--incremental"); |
| } |
| |
| cmd.no_stdin = 1; |
| |
| ret = start_command(&cmd); |
| if (ret) |
| return ret; |
| |
| out = xfdopen(cmd.out, "r"); |
| while (strbuf_getline_lf(&line, out) != EOF) { |
| if (line.len != the_hash_algo->hexsz) |
| die(_("repack: Expecting full hex object ID lines only from pack-objects.")); |
| string_list_append(&names, line.buf); |
| } |
| fclose(out); |
| ret = finish_command(&cmd); |
| if (ret) |
| return ret; |
| |
| if (!names.nr && !po_args.quiet) |
| printf_ln(_("Nothing new to pack.")); |
| |
| close_all_packs(the_repository->objects); |
| |
| /* |
| * Ok we have prepared all new packfiles. |
| * First see if there are packs of the same name and if so |
| * if we can move them out of the way (this can happen if we |
| * repacked immediately after packing fully. |
| */ |
| failed = 0; |
| for_each_string_list_item(item, &names) { |
| for (ext = 0; ext < ARRAY_SIZE(exts); ext++) { |
| char *fname, *fname_old; |
| |
| if (!midx_cleared) { |
| clear_midx_file(the_repository); |
| midx_cleared = 1; |
| } |
| |
| fname = mkpathdup("%s/pack-%s%s", packdir, |
| item->string, exts[ext].name); |
| if (!file_exists(fname)) { |
| free(fname); |
| continue; |
| } |
| |
| fname_old = mkpathdup("%s/old-%s%s", packdir, |
| item->string, exts[ext].name); |
| if (file_exists(fname_old)) |
| if (unlink(fname_old)) |
| failed = 1; |
| |
| if (!failed && rename(fname, fname_old)) { |
| free(fname); |
| free(fname_old); |
| failed = 1; |
| break; |
| } else { |
| string_list_append(&rollback, fname); |
| free(fname_old); |
| } |
| } |
| if (failed) |
| break; |
| } |
| if (failed) { |
| struct string_list rollback_failure = STRING_LIST_INIT_DUP; |
| for_each_string_list_item(item, &rollback) { |
| char *fname, *fname_old; |
| fname = mkpathdup("%s/%s", packdir, item->string); |
| fname_old = mkpathdup("%s/old-%s", packdir, item->string); |
| if (rename(fname_old, fname)) |
| string_list_append(&rollback_failure, fname); |
| free(fname); |
| free(fname_old); |
| } |
| |
| if (rollback_failure.nr) { |
| int i; |
| fprintf(stderr, |
| _("WARNING: Some packs in use have been renamed by\n" |
| "WARNING: prefixing old- to their name, in order to\n" |
| "WARNING: replace them with the new version of the\n" |
| "WARNING: file. But the operation failed, and the\n" |
| "WARNING: attempt to rename them back to their\n" |
| "WARNING: original names also failed.\n" |
| "WARNING: Please rename them in %s manually:\n"), packdir); |
| for (i = 0; i < rollback_failure.nr; i++) |
| fprintf(stderr, "WARNING: old-%s -> %s\n", |
| rollback_failure.items[i].string, |
| rollback_failure.items[i].string); |
| } |
| exit(1); |
| } |
| |
| /* Now the ones with the same name are out of the way... */ |
| for_each_string_list_item(item, &names) { |
| for (ext = 0; ext < ARRAY_SIZE(exts); ext++) { |
| char *fname, *fname_old; |
| struct stat statbuffer; |
| int exists = 0; |
| fname = mkpathdup("%s/pack-%s%s", |
| packdir, item->string, exts[ext].name); |
| fname_old = mkpathdup("%s-%s%s", |
| packtmp, item->string, exts[ext].name); |
| if (!stat(fname_old, &statbuffer)) { |
| statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); |
| chmod(fname_old, statbuffer.st_mode); |
| exists = 1; |
| } |
| if (exists || !exts[ext].optional) { |
| if (rename(fname_old, fname)) |
| die_errno(_("renaming '%s' failed"), fname_old); |
| } |
| free(fname); |
| free(fname_old); |
| } |
| } |
| |
| /* Remove the "old-" files */ |
| for_each_string_list_item(item, &names) { |
| for (ext = 0; ext < ARRAY_SIZE(exts); ext++) { |
| char *fname; |
| fname = mkpathdup("%s/old-%s%s", |
| packdir, |
| item->string, |
| exts[ext].name); |
| if (remove_path(fname)) |
| warning(_("failed to remove '%s'"), fname); |
| free(fname); |
| } |
| } |
| |
| /* End of pack replacement. */ |
| |
| reprepare_packed_git(the_repository); |
| |
| if (delete_redundant) { |
| const int hexsz = the_hash_algo->hexsz; |
| int opts = 0; |
| string_list_sort(&names); |
| for_each_string_list_item(item, &existing_packs) { |
| char *sha1; |
| size_t len = strlen(item->string); |
| if (len < hexsz) |
| continue; |
| sha1 = item->string + len - hexsz; |
| if (!string_list_has_string(&names, sha1)) |
| remove_redundant_pack(packdir, item->string); |
| } |
| if (!po_args.quiet && isatty(2)) |
| 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 (!no_update_server_info) |
| update_server_info(0); |
| remove_temporary_files(); |
| |
| if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0)) |
| write_midx_file(get_object_directory()); |
| |
| string_list_clear(&names, 0); |
| string_list_clear(&rollback, 0); |
| string_list_clear(&existing_packs, 0); |
| strbuf_release(&line); |
| |
| return 0; |
| } |