diff options
Diffstat (limited to 'third_party/git/builtin/repack.c')
| -rw-r--r-- | third_party/git/builtin/repack.c | 580 |
1 files changed, 0 insertions, 580 deletions
diff --git a/third_party/git/builtin/repack.c b/third_party/git/builtin/repack.c deleted file mode 100644 index 01e7767c7928..000000000000 --- a/third_party/git/builtin/repack.c +++ /dev/null @@ -1,580 +0,0 @@ -#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" - -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) -{ - 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); -} - -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) -{ - 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, 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), the_hash_algo->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. - * - * 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); - 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; - 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) { - if (!(pack_everything & ALL_INTO_ONE) || - !is_bare_repository()) - write_bitmaps = 0; - } - if (pack_kept_objects < 0) - pack_kept_objects = write_bitmaps > 0; - - 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); - - 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"); - 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_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) { - 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) { - strvec_pushf(&cmd.args, - "--unpack-unreachable=%s", - unpack_unreachable); - strvec_push(&cmd.env_array, "GIT_REF_PARANOIA=1"); - } 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 { - strvec_push(&cmd.env_array, "GIT_REF_PARANOIA=1"); - } - } - } else { - strvec_push(&cmd.args, "--unpacked"); - strvec_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_object_store(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; - - 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(), 0); - - string_list_clear(&names, 0); - string_list_clear(&rollback, 0); - string_list_clear(&existing_packs, 0); - strbuf_release(&line); - - return 0; -} |