[thirdparty/git.git] / builtin / repack.c

#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;
}
Commit	Line	Data
a1bbc6c0 SB	1	#include "builtin.h"
a1bbc6c0 SB	2	#include "cache.h"
b2141fc1	3	#include "config.h"
a1bbc6c0 SB	4	#include "dir.h"
	5	#include "parse-options.h"
	6	#include "run-command.h"
	7	#include "sigchain.h"
	8	#include "strbuf.h"
	9	#include "string-list.h"
dbbcd44f	10	#include "strvec.h"
525e18c0	11	#include "midx.h"
5d19e813	12	#include "packfile.h"
9460fd48	13	#include "prune-packed.h"
36f0f344	14	#include "object-store.h"
b14ed5ad	15	#include "promisor-remote.h"
120ad2b0	16	#include "shallow.h"
a1bbc6c0 SB	17
a1bbc6c0 SB	18	static int delta_base_offset = 1;
ee34a2be	19	static int pack_kept_objects = -1;
36eba032	20	static int write_bitmaps = -1;
16d75fa4	21	static int use_delta_islands;
a1bbc6c0 SB	22	static char packdir, packtmp;
	23
	24	static const char *const git_repack_usage[] = {
9c9b4f2f	25	N_("git repack [<options>]"),
a1bbc6c0 SB	26	NULL
	27	};
	28
1c409a70 DT	29	static const char incremental_bitmap_conflict_error[] = N_(
	30	"Incremental repacks are incompatible with bitmap indexes. Use\n"
	31	"--no-write-bitmap-index or disable the pack.writebitmaps configuration."
	32	);
	33
	34
a1bbc6c0 SB	35	static int repack_config(const char var, const char value, void *cb)
	36	{
	37	if (!strcmp(var, "repack.usedeltabaseoffset")) {
	38	delta_base_offset = git_config_bool(var, value);
	39	return 0;
	40	}
ee34a2be JK	41	if (!strcmp(var, "repack.packkeptobjects")) {
	42	pack_kept_objects = git_config_bool(var, value);
	43	return 0;
	44	}
71d76cb4 JK	45	if (!strcmp(var, "repack.writebitmaps") \|\|
71d76cb4 JK	46	!strcmp(var, "pack.writebitmaps")) {
d078d85b	47	write_bitmaps = git_config_bool(var, value);
3198b89f JK	48	return 0;
3198b89f JK	49	}
16d75fa4 JK	50	if (!strcmp(var, "repack.usedeltaislands")) {
	51	use_delta_islands = git_config_bool(var, value);
	52	return 0;
	53	}
a1bbc6c0 SB	54	return git_default_config(var, value, cb);
	55	}
	56
	57	/*
	58	* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
	59	*/
	60	static void remove_temporary_files(void)
	61	{
	62	struct strbuf buf = STRBUF_INIT;
	63	size_t dirlen, prefixlen;
	64	DIR *dir;
	65	struct dirent *e;
	66
	67	dir = opendir(packdir);
	68	if (!dir)
	69	return;
	70
	71	/* Point at the slash at the end of ".../objects/pack/" */
	72	dirlen = strlen(packdir) + 1;
	73	strbuf_addstr(&buf, packtmp);
	74	/* Hold the length of ".tmp-%d-pack-" */
	75	prefixlen = buf.len - dirlen;
	76
	77	while ((e = readdir(dir))) {
	78	if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
	79	continue;
	80	strbuf_setlen(&buf, dirlen);
	81	strbuf_addstr(&buf, e->d_name);
	82	unlink(buf.buf);
	83	}
	84	closedir(dir);
	85	strbuf_release(&buf);
	86	}
	87
	88	static void remove_pack_on_signal(int signo)
	89	{
	90	remove_temporary_files();
	91	sigchain_pop(signo);
	92	raise(signo);
	93	}
	94
	95	/*
	96	* Adds all packs hex strings to the fname list, which do not
5d19e813	97	* have a corresponding .keep file. These packs are not to
0c16cd49	98	* be kept if we are going to pack everything into one file.
a1bbc6c0	99	*/
ed7e5fc3 NTND	100	static void get_non_kept_pack_filenames(struct string_list *fname_list,
ed7e5fc3 NTND	101	const struct string_list *extra_keep)
a1bbc6c0 SB	102	{
	103	DIR *dir;
	104	struct dirent *e;
	105	char *fname;
a1bbc6c0 SB	106
	107	if (!(dir = opendir(packdir)))
	108	return;
	109
	110	while ((e = readdir(dir)) != NULL) {
26936bfd	111	size_t len;
ed7e5fc3 NTND	112	int i;
	113
	114	for (i = 0; i < extra_keep->nr; i++)
	115	if (!fspathcmp(e->d_name, extra_keep->items[i].string))
	116	break;
	117	if (extra_keep->nr > 0 && i < extra_keep->nr)
	118	continue;
	119
26936bfd	120	if (!strip_suffix(e->d_name, ".pack", &len))
a1bbc6c0 SB	121	continue;
a1bbc6c0 SB	122
a1bbc6c0 SB	123	fname = xmemdupz(e->d_name, len);
a1bbc6c0 SB	124
5d19e813	125	if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
a1bbc6c0 SB	126	string_list_append_nodup(fname_list, fname);
	127	else
	128	free(fname);
	129	}
	130	closedir(dir);
	131	}
	132
	133	static void remove_redundant_pack(const char dir_name, const char base_name)
	134	{
a1bbc6c0	135	struct strbuf buf = STRBUF_INIT;
59552fb3	136	struct multi_pack_index *m = get_local_multi_pack_index(the_repository);
e08f7bb0 TB	137	strbuf_addf(&buf, "%s.pack", base_name);
	138	if (m && midx_contains_pack(m, buf.buf))
	139	clear_midx_file(the_repository);
	140	strbuf_insertf(&buf, 0, "%s/", dir_name);
8434e85d	141	unlink_pack_path(buf.buf, 1);
a1bbc6c0 SB	142	strbuf_release(&buf);
	143	}
	144
2b958e79 JT	145	struct pack_objects_args {
	146	const char *window;
	147	const char *window_memory;
	148	const char *depth;
	149	const char *threads;
	150	const char *max_pack_size;
	151	int no_reuse_delta;
	152	int no_reuse_object;
	153	int quiet;
	154	int local;
	155	};
	156
	157	static void prepare_pack_objects(struct child_process *cmd,
	158	const struct pack_objects_args *args)
	159	{
22f9b7f3	160	strvec_push(&cmd->args, "pack-objects");
2b958e79	161	if (args->window)
22f9b7f3	162	strvec_pushf(&cmd->args, "--window=%s", args->window);
2b958e79	163	if (args->window_memory)
22f9b7f3	164	strvec_pushf(&cmd->args, "--window-memory=%s", args->window_memory);
2b958e79	165	if (args->depth)
22f9b7f3	166	strvec_pushf(&cmd->args, "--depth=%s", args->depth);
2b958e79	167	if (args->threads)
22f9b7f3	168	strvec_pushf(&cmd->args, "--threads=%s", args->threads);
2b958e79	169	if (args->max_pack_size)
22f9b7f3	170	strvec_pushf(&cmd->args, "--max-pack-size=%s", args->max_pack_size);
2b958e79	171	if (args->no_reuse_delta)
22f9b7f3	172	strvec_pushf(&cmd->args, "--no-reuse-delta");
2b958e79	173	if (args->no_reuse_object)
22f9b7f3	174	strvec_pushf(&cmd->args, "--no-reuse-object");
2b958e79	175	if (args->local)
22f9b7f3	176	strvec_push(&cmd->args, "--local");
2b958e79	177	if (args->quiet)
22f9b7f3	178	strvec_push(&cmd->args, "--quiet");
2b958e79	179	if (delta_base_offset)
22f9b7f3 JK	180	strvec_push(&cmd->args, "--delta-base-offset");
22f9b7f3 JK	181	strvec_push(&cmd->args, packtmp);
2b958e79 JT	182	cmd->git_cmd = 1;
	183	cmd->out = -1;
	184	}
	185
5d19e813 JT	186	/*
	187	* Write oid to the given struct child_process's stdin, starting it first if
	188	* necessary.
	189	*/
	190	static int write_oid(const struct object_id oid, struct packed_git pack,
	191	uint32_t pos, void *data)
	192	{
	193	struct child_process *cmd = data;
	194
	195	if (cmd->in == -1) {
	196	if (start_command(cmd))
c83d950e	197	die(_("could not start pack-objects to repack promisor objects"));
5d19e813 JT	198	}
5d19e813 JT	199
dd336a55	200	xwrite(cmd->in, oid_to_hex(oid), the_hash_algo->hexsz);
5d19e813 JT	201	xwrite(cmd->in, "\n", 1);
	202	return 0;
	203	}
	204
	205	static void repack_promisor_objects(const struct pack_objects_args *args,
	206	struct string_list *names)
	207	{
	208	struct child_process cmd = CHILD_PROCESS_INIT;
	209	FILE *out;
	210	struct strbuf line = STRBUF_INIT;
	211
	212	prepare_pack_objects(&cmd, args);
	213	cmd.in = -1;
	214
	215	/*
	216	* NEEDSWORK: Giving pack-objects only the OIDs without any ordering
	217	* hints may result in suboptimal deltas in the resulting pack. See if
	218	* the OIDs can be sent with fake paths such that pack-objects can use a
	219	* {type -> existing pack order} ordering when computing deltas instead
	220	* of a {type -> size} ordering, which may produce better deltas.
	221	*/
	222	for_each_packed_object(write_oid, &cmd,
	223	FOR_EACH_OBJECT_PROMISOR_ONLY);
	224
	225	if (cmd.in == -1)
	226	/* No packed objects; cmd was never started */
	227	return;
	228
	229	close(cmd.in);
	230
	231	out = xfdopen(cmd.out, "r");
	232	while (strbuf_getline_lf(&line, out) != EOF) {
	233	char *promisor_name;
	234	int fd;
2f0c9e9a	235	if (line.len != the_hash_algo->hexsz)
3813a89f	236	die(_("repack: Expecting full hex object ID lines only from pack-objects."));
5d19e813 JT	237	string_list_append(names, line.buf);
	238
	239	/*
	240	* pack-objects creates the .pack and .idx files, but not the
	241	* .promisor file. Create the .promisor file, which is empty.
5374a290 JT	242	*
	243	* NEEDSWORK: fetch-pack sometimes generates non-empty
	244	* .promisor files containing the ref names and associated
	245	* hashes at the point of generation of the corresponding
	246	* packfile, but this would not preserve their contents. Maybe
	247	* concatenate the contents of all .promisor files instead of
	248	* just creating a new empty file.
5d19e813 JT	249	*/
	250	promisor_name = mkpathdup("%s-%s.promisor", packtmp,
	251	line.buf);
	252	fd = open(promisor_name, O_CREAT\|O_EXCL\|O_WRONLY, 0600);
	253	if (fd < 0)
c83d950e	254	die_errno(_("unable to create '%s'"), promisor_name);
5d19e813 JT	255	close(fd);
	256	free(promisor_name);
	257	}
	258	fclose(out);
	259	if (finish_command(&cmd))
c83d950e	260	die(_("could not finish pack-objects to repack promisor objects"));
5d19e813 JT	261	}
5d19e813 JT	262
a1bbc6c0 SB	263	#define ALL_INTO_ONE 1
	264	#define LOOSEN_UNREACHABLE 2
	265
	266	int cmd_repack(int argc, const char *argv, const char prefix)
	267	{
42a02d85 JK	268	struct {
42a02d85 JK	269	const char *name;
b77fcd1e	270	unsigned optional:1;
42a02d85 JK	271	} exts[] = {
	272	{".pack"},
	273	{".idx"},
5cf2741c	274	{".bitmap", 1},
5d19e813	275	{".promisor", 1},
42a02d85	276	};
d3180279	277	struct child_process cmd = CHILD_PROCESS_INIT;
a1bbc6c0	278	struct string_list_item *item;
a1bbc6c0 SB	279	struct string_list names = STRING_LIST_INIT_DUP;
	280	struct string_list rollback = STRING_LIST_INIT_NODUP;
	281	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	282	struct strbuf line = STRBUF_INIT;
ed7e5fc3	283	int i, ext, ret, failed;
a1bbc6c0 SB	284	FILE *out;
	285
	286	/* variables to be filled by option parsing */
	287	int pack_everything = 0;
	288	int delete_redundant = 0;
aa8bd519	289	const char *unpack_unreachable = NULL;
905f27b8	290	int keep_unreachable = 0;
ed7e5fc3	291	struct string_list keep_pack_list = STRING_LIST_INIT_NODUP;
a1bbc6c0	292	int no_update_server_info = 0;
2b958e79	293	struct pack_objects_args po_args = {NULL};
a1bbc6c0 SB	294
	295	struct option builtin_repack_options[] = {
	296	OPT_BIT('a', NULL, &pack_everything,
	297	N_("pack everything in a single pack"), ALL_INTO_ONE),
	298	OPT_BIT('A', NULL, &pack_everything,
	299	N_("same as -a, and turn unreachable objects loose"),
	300	LOOSEN_UNREACHABLE \| ALL_INTO_ONE),
	301	OPT_BOOL('d', NULL, &delete_redundant,
	302	N_("remove redundant packs, and run git-prune-packed")),
2b958e79	303	OPT_BOOL('f', NULL, &po_args.no_reuse_delta,
a1bbc6c0	304	N_("pass --no-reuse-delta to git-pack-objects")),
2b958e79	305	OPT_BOOL('F', NULL, &po_args.no_reuse_object,
a1bbc6c0 SB	306	N_("pass --no-reuse-object to git-pack-objects")),
	307	OPT_BOOL('n', NULL, &no_update_server_info,
	308	N_("do not run git-update-server-info")),
2b958e79 JT	309	OPT__QUIET(&po_args.quiet, N_("be quiet")),
2b958e79 JT	310	OPT_BOOL('l', "local", &po_args.local,
a1bbc6c0	311	N_("pass --local to git-pack-objects")),
d078d85b	312	OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
5cf2741c	313	N_("write bitmap index")),
16d75fa4 JK	314	OPT_BOOL('i', "delta-islands", &use_delta_islands,
16d75fa4 JK	315	N_("pass --delta-islands to git-pack-objects")),
a1bbc6c0 SB	316	OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
a1bbc6c0 SB	317	N_("with -A, do not loosen objects older than this")),
905f27b8 JK	318	OPT_BOOL('k', "keep-unreachable", &keep_unreachable,
905f27b8 JK	319	N_("with -a, repack unreachable objects")),
2b958e79	320	OPT_STRING(0, "window", &po_args.window, N_("n"),
a1bbc6c0	321	N_("size of the window used for delta compression")),
2b958e79	322	OPT_STRING(0, "window-memory", &po_args.window_memory, N_("bytes"),
a1bbc6c0	323	N_("same as the above, but limit memory size instead of entries count")),
2b958e79	324	OPT_STRING(0, "depth", &po_args.depth, N_("n"),
a1bbc6c0	325	N_("limits the maximum delta depth")),
2b958e79	326	OPT_STRING(0, "threads", &po_args.threads, N_("n"),
40bcf318	327	N_("limits the maximum number of threads")),
2b958e79	328	OPT_STRING(0, "max-pack-size", &po_args.max_pack_size, N_("bytes"),
a1bbc6c0	329	N_("maximum size of each packfile")),
ee34a2be JK	330	OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
ee34a2be JK	331	N_("repack objects in packs marked with .keep")),
ed7e5fc3 NTND	332	OPT_STRING_LIST(0, "keep-pack", &keep_pack_list, N_("name"),
ed7e5fc3 NTND	333	N_("do not repack this pack")),
a1bbc6c0 SB	334	OPT_END()
	335	};
	336
	337	git_config(repack_config, NULL);
	338
	339	argc = parse_options(argc, argv, prefix, builtin_repack_options,
	340	git_repack_usage, 0);
	341
067fbd41 JK	342	if (delete_redundant && repository_format_precious_objects)
	343	die(_("cannot delete packs in a precious-objects repo"));
	344
905f27b8 JK	345	if (keep_unreachable &&
	346	(unpack_unreachable \|\| (pack_everything & LOOSEN_UNREACHABLE)))
	347	die(_("--keep-unreachable and -A are incompatible"));
	348
73284822	349	if (write_bitmaps < 0) {
25575015	350	if (!(pack_everything & ALL_INTO_ONE) \|\|
7ff024e7	351	!is_bare_repository())
25575015	352	write_bitmaps = 0;
73284822	353	}
ee34a2be	354	if (pack_kept_objects < 0)
7ff024e7	355	pack_kept_objects = write_bitmaps > 0;
ee34a2be	356
1c409a70 DT	357	if (write_bitmaps && !(pack_everything & ALL_INTO_ONE))
	358	die(_(incremental_bitmap_conflict_error));
	359
a1bbc6c0 SB	360	packdir = mkpathdup("%s/pack", get_object_directory());
	361	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
	362
	363	sigchain_push_common(remove_pack_on_signal);
	364
2b958e79 JT	365	prepare_pack_objects(&cmd, &po_args);
2b958e79 JT	366
22f9b7f3	367	strvec_push(&cmd.args, "--keep-true-parents");
ee34a2be	368	if (!pack_kept_objects)
22f9b7f3	369	strvec_push(&cmd.args, "--honor-pack-keep");
ed7e5fc3	370	for (i = 0; i < keep_pack_list.nr; i++)
22f9b7f3	371	strvec_pushf(&cmd.args, "--keep-pack=%s",
f6d8942b	372	keep_pack_list.items[i].string);
22f9b7f3 JK	373	strvec_push(&cmd.args, "--non-empty");
	374	strvec_push(&cmd.args, "--all");
	375	strvec_push(&cmd.args, "--reflog");
	376	strvec_push(&cmd.args, "--indexed-objects");
b14ed5ad	377	if (has_promisor_remote())
22f9b7f3	378	strvec_push(&cmd.args, "--exclude-promisor-objects");
25575015	379	if (write_bitmaps > 0)
22f9b7f3	380	strvec_push(&cmd.args, "--write-bitmap-index");
25575015	381	else if (write_bitmaps < 0)
22f9b7f3	382	strvec_push(&cmd.args, "--write-bitmap-index-quiet");
16d75fa4	383	if (use_delta_islands)
22f9b7f3	384	strvec_push(&cmd.args, "--delta-islands");
a1bbc6c0 SB	385
a1bbc6c0 SB	386	if (pack_everything & ALL_INTO_ONE) {
ed7e5fc3	387	get_non_kept_pack_filenames(&existing_packs, &keep_pack_list);
a1bbc6c0	388
5d19e813 JT	389	repack_promisor_objects(&po_args, &names);
5d19e813 JT	390
a1bbc6c0	391	if (existing_packs.nr && delete_redundant) {
8d422993	392	if (unpack_unreachable) {
22f9b7f3	393	strvec_pushf(&cmd.args,
f6d8942b JK	394	"--unpack-unreachable=%s",
f6d8942b JK	395	unpack_unreachable);
22f9b7f3	396	strvec_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
8d422993	397	} else if (pack_everything & LOOSEN_UNREACHABLE) {
22f9b7f3	398	strvec_push(&cmd.args,
f6d8942b	399	"--unpack-unreachable");
905f27b8	400	} else if (keep_unreachable) {
22f9b7f3 JK	401	strvec_push(&cmd.args, "--keep-unreachable");
22f9b7f3 JK	402	strvec_push(&cmd.args, "--pack-loose-unreachable");
8d422993	403	} else {
22f9b7f3	404	strvec_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
8d422993	405	}
a1bbc6c0 SB	406	}
a1bbc6c0 SB	407	} else {
22f9b7f3 JK	408	strvec_push(&cmd.args, "--unpacked");
22f9b7f3 JK	409	strvec_push(&cmd.args, "--incremental");
a1bbc6c0 SB	410	}
a1bbc6c0 SB	411
a1bbc6c0 SB	412	cmd.no_stdin = 1;
	413
	414	ret = start_command(&cmd);
	415	if (ret)
ffc9329f	416	return ret;
a1bbc6c0	417
a1bbc6c0	418	out = xfdopen(cmd.out, "r");
8f309aeb	419	while (strbuf_getline_lf(&line, out) != EOF) {
2f0c9e9a	420	if (line.len != the_hash_algo->hexsz)
3813a89f	421	die(_("repack: Expecting full hex object ID lines only from pack-objects."));
a1bbc6c0	422	string_list_append(&names, line.buf);
a1bbc6c0 SB	423	}
	424	fclose(out);
	425	ret = finish_command(&cmd);
	426	if (ret)
ffc9329f	427	return ret;
a1bbc6c0	428
2b958e79	429	if (!names.nr && !po_args.quiet)
c83d950e	430	printf_ln(_("Nothing new to pack."));
a1bbc6c0	431
2d511cfc	432	close_object_store(the_repository->objects);
5bdece0d	433
a1bbc6c0 SB	434	/*
	435	* Ok we have prepared all new packfiles.
	436	* First see if there are packs of the same name and if so
	437	* if we can move them out of the way (this can happen if we
	438	* repacked immediately after packing fully.
	439	*/
	440	failed = 0;
	441	for_each_string_list_item(item, &names) {
b328c216	442	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303	443	char fname, fname_old;
525e18c0	444
9d7fbfd2	445	fname = mkpathdup("%s/pack-%s%s", packdir,
42a02d85	446	item->string, exts[ext].name);
a1bbc6c0 SB	447	if (!file_exists(fname)) {
	448	free(fname);
	449	continue;
	450	}
	451
e3cf2303	452	fname_old = mkpathdup("%s/old-%s%s", packdir,
42a02d85	453	item->string, exts[ext].name);
a1bbc6c0 SB	454	if (file_exists(fname_old))
	455	if (unlink(fname_old))
	456	failed = 1;
	457
	458	if (!failed && rename(fname, fname_old)) {
	459	free(fname);
e3cf2303	460	free(fname_old);
a1bbc6c0 SB	461	failed = 1;
	462	break;
	463	} else {
	464	string_list_append(&rollback, fname);
e3cf2303	465	free(fname_old);
a1bbc6c0 SB	466	}
	467	}
	468	if (failed)
	469	break;
	470	}
	471	if (failed) {
	472	struct string_list rollback_failure = STRING_LIST_INIT_DUP;
	473	for_each_string_list_item(item, &rollback) {
e3cf2303	474	char fname, fname_old;
a1bbc6c0	475	fname = mkpathdup("%s/%s", packdir, item->string);
e3cf2303	476	fname_old = mkpathdup("%s/old-%s", packdir, item->string);
a1bbc6c0 SB	477	if (rename(fname_old, fname))
	478	string_list_append(&rollback_failure, fname);
	479	free(fname);
e3cf2303	480	free(fname_old);
a1bbc6c0 SB	481	}
	482
	483	if (rollback_failure.nr) {
	484	int i;
	485	fprintf(stderr,
c83d950e NTND	486	_("WARNING: Some packs in use have been renamed by\n"
	487	"WARNING: prefixing old- to their name, in order to\n"
	488	"WARNING: replace them with the new version of the\n"
	489	"WARNING: file. But the operation failed, and the\n"
	490	"WARNING: attempt to rename them back to their\n"
	491	"WARNING: original names also failed.\n"
	492	"WARNING: Please rename them in %s manually:\n"), packdir);
a1bbc6c0 SB	493	for (i = 0; i < rollback_failure.nr; i++)
	494	fprintf(stderr, "WARNING: old-%s -> %s\n",
	495	rollback_failure.items[i].string,
	496	rollback_failure.items[i].string);
	497	}
	498	exit(1);
	499	}
	500
	501	/* Now the ones with the same name are out of the way... */
	502	for_each_string_list_item(item, &names) {
b328c216	503	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	504	char fname, fname_old;
a1bbc6c0 SB	505	struct stat statbuffer;
b77fcd1e	506	int exists = 0;
a1bbc6c0	507	fname = mkpathdup("%s/pack-%s%s",
42a02d85	508	packdir, item->string, exts[ext].name);
a1bbc6c0	509	fname_old = mkpathdup("%s-%s%s",
42a02d85	510	packtmp, item->string, exts[ext].name);
a1bbc6c0 SB	511	if (!stat(fname_old, &statbuffer)) {
	512	statbuffer.st_mode &= ~(S_IWUSR \| S_IWGRP \| S_IWOTH);
	513	chmod(fname_old, statbuffer.st_mode);
b77fcd1e JK	514	exists = 1;
	515	}
	516	if (exists \|\| !exts[ext].optional) {
	517	if (rename(fname_old, fname))
	518	die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0	519	}
a1bbc6c0 SB	520	free(fname);
	521	free(fname_old);
	522	}
	523	}
	524
	525	/* Remove the "old-" files */
	526	for_each_string_list_item(item, &names) {
b328c216	527	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303 JK	528	char *fname;
	529	fname = mkpathdup("%s/old-%s%s",
	530	packdir,
	531	item->string,
	532	exts[ext].name);
0b63c6a5	533	if (remove_path(fname))
e923a8ab	534	warning(_("failed to remove '%s'"), fname);
e3cf2303	535	free(fname);
a1bbc6c0 SB	536	}
	537	}
	538
	539	/* End of pack replacement. */
	540
5d19e813 JT	541	reprepare_packed_git(the_repository);
5d19e813 JT	542
a1bbc6c0	543	if (delete_redundant) {
2f0c9e9a	544	const int hexsz = the_hash_algo->hexsz;
4489a480	545	int opts = 0;
3383e199	546	string_list_sort(&names);
a1bbc6c0 SB	547	for_each_string_list_item(item, &existing_packs) {
	548	char *sha1;
	549	size_t len = strlen(item->string);
2f0c9e9a	550	if (len < hexsz)
a1bbc6c0	551	continue;
2f0c9e9a	552	sha1 = item->string + len - hexsz;
a1bbc6c0 SB	553	if (!string_list_has_string(&names, sha1))
	554	remove_redundant_pack(packdir, item->string);
	555	}
2b958e79	556	if (!po_args.quiet && isatty(2))
4489a480 RS	557	opts \|= PRUNE_PACKED_VERBOSE;
4489a480 RS	558	prune_packed_objects(opts);
5dcfbf56 JS	559
	560	if (!keep_unreachable &&
	561	(!(pack_everything & LOOSEN_UNREACHABLE) \|\|
	562	unpack_unreachable) &&
	563	is_repository_shallow(the_repository))
	564	prune_shallow(PRUNE_QUICK);
a1bbc6c0 SB	565	}
a1bbc6c0 SB	566
4489a480 RS	567	if (!no_update_server_info)
4489a480 RS	568	update_server_info(0);
a1bbc6c0	569	remove_temporary_files();
0465a505 DS	570
0465a505 DS	571	if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0))
efbc3aee	572	write_midx_file(get_object_directory(), 0);
0465a505	573
a1bbc6c0 SB	574	string_list_clear(&names, 0);
	575	string_list_clear(&rollback, 0);
	576	string_list_clear(&existing_packs, 0);
	577	strbuf_release(&line);
	578
	579	return 0;
	580	}