[git/git.git] / builtin / gc.c

/*
 * git gc builtin command
 *
 * Cleanup unreachable files and optimize the repository.
 *
 * Copyright (c) 2007 James Bowes
 *
 * Based on git-gc.sh, which is
 *
 * Copyright (c) 2006 Shawn O. Pearce
 */

#include "builtin.h"
#include "lockfile.h"
#include "parse-options.h"
#include "run-command.h"
#include "sigchain.h"
#include "argv-array.h"
#include "commit.h"

#define FAILED_RUN "failed to run %s"

static const char * const builtin_gc_usage[] = {
	N_("git gc [options]"),
	NULL
};

static int pack_refs = 1;
static int prune_reflogs = 1;
static int aggressive_depth = 250;
static int aggressive_window = 250;
static int gc_auto_threshold = 6700;
static int gc_auto_pack_limit = 50;
static int detach_auto = 1;
static const char *prune_expire = "2.weeks.ago";

static struct argv_array pack_refs_cmd = ARGV_ARRAY_INIT;
static struct argv_array reflog = ARGV_ARRAY_INIT;
static struct argv_array repack = ARGV_ARRAY_INIT;
static struct argv_array prune = ARGV_ARRAY_INIT;
static struct argv_array rerere = ARGV_ARRAY_INIT;

static char *pidfile;

static void remove_pidfile(void)
{
	if (pidfile)
		unlink(pidfile);
}

static void remove_pidfile_on_signal(int signo)
{
	remove_pidfile();
	sigchain_pop(signo);
	raise(signo);
}

static void git_config_date_string(const char *key, const char **output)
{
	if (git_config_get_string_const(key, output))
		return;
	if (strcmp(*output, "now")) {
		unsigned long now = approxidate("now");
		if (approxidate(*output) >= now)
			git_die_config(key, _("Invalid %s: '%s'"), key, *output);
	}
}

static void gc_config(void)
{
	const char *value;

	if (!git_config_get_value("gc.packrefs", &value)) {
		if (value && !strcmp(value, "notbare"))
			pack_refs = -1;
		else
			pack_refs = git_config_bool("gc.packrefs", value);
	}

	git_config_get_int("gc.aggressivewindow", &aggressive_window);
	git_config_get_int("gc.aggressivedepth", &aggressive_depth);
	git_config_get_int("gc.auto", &gc_auto_threshold);
	git_config_get_int("gc.autopacklimit", &gc_auto_pack_limit);
	git_config_get_bool("gc.autodetach", &detach_auto);
	git_config_date_string("gc.pruneexpire", &prune_expire);
	git_config(git_default_config, NULL);
}

static int too_many_loose_objects(void)
{
	/*
	 * Quickly check if a "gc" is needed, by estimating how
	 * many loose objects there are.  Because SHA-1 is evenly
	 * distributed, we can check only one and get a reasonable
	 * estimate.
	 */
	char path[PATH_MAX];
	const char *objdir = get_object_directory();
	DIR *dir;
	struct dirent *ent;
	int auto_threshold;
	int num_loose = 0;
	int needed = 0;

	if (gc_auto_threshold <= 0)
		return 0;

	if (sizeof(path) <= snprintf(path, sizeof(path), "%s/17", objdir)) {
		warning(_("insanely long object directory %.*s"), 50, objdir);
		return 0;
	}
	dir = opendir(path);
	if (!dir)
		return 0;

	auto_threshold = (gc_auto_threshold + 255) / 256;
	while ((ent = readdir(dir)) != NULL) {
		if (strspn(ent->d_name, "0123456789abcdef") != 38 ||
		    ent->d_name[38] != '\0')
			continue;
		if (++num_loose > auto_threshold) {
			needed = 1;
			break;
		}
	}
	closedir(dir);
	return needed;
}

static int too_many_packs(void)
{
	struct packed_git *p;
	int cnt;

	if (gc_auto_pack_limit <= 0)
		return 0;

	prepare_packed_git();
	for (cnt = 0, p = packed_git; p; p = p->next) {
		if (!p->pack_local)
			continue;
		if (p->pack_keep)
			continue;
		/*
		 * Perhaps check the size of the pack and count only
		 * very small ones here?
		 */
		cnt++;
	}
	return gc_auto_pack_limit <= cnt;
}

static void add_repack_all_option(void)
{
	if (prune_expire && !strcmp(prune_expire, "now"))
		argv_array_push(&repack, "-a");
	else {
		argv_array_push(&repack, "-A");
		if (prune_expire)
			argv_array_pushf(&repack, "--unpack-unreachable=%s", prune_expire);
	}
}

static int need_to_gc(void)
{
	/*
	 * Setting gc.auto to 0 or negative can disable the
	 * automatic gc.
	 */
	if (gc_auto_threshold <= 0)
		return 0;

	/*
	 * If there are too many loose objects, but not too many
	 * packs, we run "repack -d -l".  If there are too many packs,
	 * we run "repack -A -d -l".  Otherwise we tell the caller
	 * there is no need.
	 */
	if (too_many_packs())
		add_repack_all_option();
	else if (!too_many_loose_objects())
		return 0;

	if (run_hook_le(NULL, "pre-auto-gc", NULL))
		return 0;
	return 1;
}

/* return NULL on success, else hostname running the gc */
static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
{
	static struct lock_file lock;
	char my_host[128];
	struct strbuf sb = STRBUF_INIT;
	struct stat st;
	uintmax_t pid;
	FILE *fp;
	int fd;

	if (pidfile)
		/* already locked */
		return NULL;

	if (gethostname(my_host, sizeof(my_host)))
		strcpy(my_host, "unknown");

	fd = hold_lock_file_for_update(&lock, git_path("gc.pid"),
				       LOCK_DIE_ON_ERROR);
	if (!force) {
		static char locking_host[128];
		int should_exit;
		fp = fopen(git_path("gc.pid"), "r");
		memset(locking_host, 0, sizeof(locking_host));
		should_exit =
			fp != NULL &&
			!fstat(fileno(fp), &st) &&
			/*
			 * 12 hour limit is very generous as gc should
			 * never take that long. On the other hand we
			 * don't really need a strict limit here,
			 * running gc --auto one day late is not a big
			 * problem. --force can be used in manual gc
			 * after the user verifies that no gc is
			 * running.
			 */
			time(NULL) - st.st_mtime <= 12 * 3600 &&
			fscanf(fp, "%"PRIuMAX" %127c", &pid, locking_host) == 2 &&
			/* be gentle to concurrent "gc" on remote hosts */
			(strcmp(locking_host, my_host) || !kill(pid, 0) || errno == EPERM);
		if (fp != NULL)
			fclose(fp);
		if (should_exit) {
			if (fd >= 0)
				rollback_lock_file(&lock);
			*ret_pid = pid;
			return locking_host;
		}
	}

	strbuf_addf(&sb, "%"PRIuMAX" %s",
		    (uintmax_t) getpid(), my_host);
	write_in_full(fd, sb.buf, sb.len);
	strbuf_release(&sb);
	commit_lock_file(&lock);

	pidfile = git_pathdup("gc.pid");
	sigchain_push_common(remove_pidfile_on_signal);
	atexit(remove_pidfile);

	return NULL;
}

static int gc_before_repack(void)
{
	if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
		return error(FAILED_RUN, pack_refs_cmd.argv[0]);

	if (prune_reflogs && run_command_v_opt(reflog.argv, RUN_GIT_CMD))
		return error(FAILED_RUN, reflog.argv[0]);

	pack_refs = 0;
	prune_reflogs = 0;
	return 0;
}

int cmd_gc(int argc, const char **argv, const char *prefix)
{
	int aggressive = 0;
	int auto_gc = 0;
	int quiet = 0;
	int force = 0;
	const char *name;
	pid_t pid;

	struct option builtin_gc_options[] = {
		OPT__QUIET(&quiet, N_("suppress progress reporting")),
		{ OPTION_STRING, 0, "prune", &prune_expire, N_("date"),
			N_("prune unreferenced objects"),
			PARSE_OPT_OPTARG, NULL, (intptr_t)prune_expire },
		OPT_BOOL(0, "aggressive", &aggressive, N_("be more thorough (increased runtime)")),
		OPT_BOOL(0, "auto", &auto_gc, N_("enable auto-gc mode")),
		OPT_BOOL(0, "force", &force, N_("force running gc even if there may be another gc running")),
		OPT_END()
	};

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_gc_usage, builtin_gc_options);

	argv_array_pushl(&pack_refs_cmd, "pack-refs", "--all", "--prune", NULL);
	argv_array_pushl(&reflog, "reflog", "expire", "--all", NULL);
	argv_array_pushl(&repack, "repack", "-d", "-l", NULL);
	argv_array_pushl(&prune, "prune", "--expire", NULL);
	argv_array_pushl(&rerere, "rerere", "gc", NULL);

	gc_config();

	if (pack_refs < 0)
		pack_refs = !is_bare_repository();

	argc = parse_options(argc, argv, prefix, builtin_gc_options,
			     builtin_gc_usage, 0);
	if (argc > 0)
		usage_with_options(builtin_gc_usage, builtin_gc_options);

	if (aggressive) {
		argv_array_push(&repack, "-f");
		if (aggressive_depth > 0)
			argv_array_pushf(&repack, "--depth=%d", aggressive_depth);
		if (aggressive_window > 0)
			argv_array_pushf(&repack, "--window=%d", aggressive_window);
	}
	if (quiet)
		argv_array_push(&repack, "-q");

	if (auto_gc) {
		/*
		 * Auto-gc should be least intrusive as possible.
		 */
		if (!need_to_gc())
			return 0;
		if (!quiet) {
			if (detach_auto)
				fprintf(stderr, _("Auto packing the repository in background for optimum performance.\n"));
			else
				fprintf(stderr, _("Auto packing the repository for optimum performance.\n"));
			fprintf(stderr, _("See \"git help gc\" for manual housekeeping.\n"));
		}
		if (detach_auto) {
			if (gc_before_repack())
				return -1;
			/*
			 * failure to daemonize is ok, we'll continue
			 * in foreground
			 */
			daemonize();
		}
	} else
		add_repack_all_option();

	name = lock_repo_for_gc(force, &pid);
	if (name) {
		if (auto_gc)
			return 0; /* be quiet on --auto */
		die(_("gc is already running on machine '%s' pid %"PRIuMAX" (use --force if not)"),
		    name, (uintmax_t)pid);
	}

	if (gc_before_repack())
		return -1;

	if (run_command_v_opt(repack.argv, RUN_GIT_CMD))
		return error(FAILED_RUN, repack.argv[0]);

	if (prune_expire) {
		argv_array_push(&prune, prune_expire);
		if (quiet)
			argv_array_push(&prune, "--no-progress");
		if (run_command_v_opt(prune.argv, RUN_GIT_CMD))
			return error(FAILED_RUN, prune.argv[0]);
	}

	if (run_command_v_opt(rerere.argv, RUN_GIT_CMD))
		return error(FAILED_RUN, rerere.argv[0]);

	if (auto_gc && too_many_loose_objects())
		warning(_("There are too many unreachable loose objects; "
			"run 'git prune' to remove them."));

	return 0;
}
Commit	Line	Data
6757ada4 JB	1	/*
	2	* git gc builtin command
	3	*
	4	* Cleanup unreachable files and optimize the repository.
	5	*
	6	* Copyright (c) 2007 James Bowes
	7	*
	8	* Based on git-gc.sh, which is
	9	*
	10	* Copyright (c) 2006 Shawn O. Pearce
	11	*/
	12
baffc0e7	13	#include "builtin.h"
697cc8ef	14	#include "lockfile.h"
44c637c8	15	#include "parse-options.h"
6757ada4	16	#include "run-command.h"
4c5baf02	17	#include "sigchain.h"
234587fc	18	#include "argv-array.h"
eab3296c	19	#include "commit.h"
6757ada4 JB	20
	21	#define FAILED_RUN "failed to run %s"
	22
44c637c8	23	static const char * const builtin_gc_usage[] = {
6705c162	24	N_("git gc [options]"),
44c637c8 JB	25	NULL
44c637c8 JB	26	};
6757ada4	27
56752391	28	static int pack_refs = 1;
62aad184	29	static int prune_reflogs = 1;
125f8146	30	static int aggressive_depth = 250;
1c192f34	31	static int aggressive_window = 250;
2c3c4399	32	static int gc_auto_threshold = 6700;
97063974	33	static int gc_auto_pack_limit = 50;
9f673f94	34	static int detach_auto = 1;
d3154b44	35	static const char *prune_expire = "2.weeks.ago";
6757ada4	36
234587fc JK	37	static struct argv_array pack_refs_cmd = ARGV_ARRAY_INIT;
	38	static struct argv_array reflog = ARGV_ARRAY_INIT;
	39	static struct argv_array repack = ARGV_ARRAY_INIT;
	40	static struct argv_array prune = ARGV_ARRAY_INIT;
	41	static struct argv_array rerere = ARGV_ARRAY_INIT;
6757ada4	42
4c5baf02 JN	43	static char *pidfile;
	44
	45	static void remove_pidfile(void)
	46	{
	47	if (pidfile)
	48	unlink(pidfile);
	49	}
	50
	51	static void remove_pidfile_on_signal(int signo)
	52	{
	53	remove_pidfile();
	54	sigchain_pop(signo);
	55	raise(signo);
	56	}
	57
09dbb90b NTND	58	static void git_config_date_string(const char key, const char *output)
	59	{
	60	if (git_config_get_string_const(key, output))
	61	return;
	62	if (strcmp(*output, "now")) {
	63	unsigned long now = approxidate("now");
	64	if (approxidate(*output) >= now)
	65	git_die_config(key, _("Invalid %s: '%s'"), key, *output);
	66	}
	67	}
	68
5801d3b4	69	static void gc_config(void)
6757ada4	70	{
5801d3b4 TA	71	const char *value;
	72
	73	if (!git_config_get_value("gc.packrefs", &value)) {
c5e5a2c0	74	if (value && !strcmp(value, "notbare"))
6757ada4 JB	75	pack_refs = -1;
6757ada4 JB	76	else
5801d3b4	77	pack_refs = git_config_bool("gc.packrefs", value);
17815501	78	}
5801d3b4 TA	79
	80	git_config_get_int("gc.aggressivewindow", &aggressive_window);
	81	git_config_get_int("gc.aggressivedepth", &aggressive_depth);
	82	git_config_get_int("gc.auto", &gc_auto_threshold);
	83	git_config_get_int("gc.autopacklimit", &gc_auto_pack_limit);
	84	git_config_get_bool("gc.autodetach", &detach_auto);
09dbb90b	85	git_config_date_string("gc.pruneexpire", &prune_expire);
5801d3b4	86	git_config(git_default_config, NULL);
6757ada4 JB	87	}
6757ada4 JB	88
a087cc98	89	static int too_many_loose_objects(void)
2c3c4399 JH	90	{
	91	/*
	92	* Quickly check if a "gc" is needed, by estimating how
	93	* many loose objects there are. Because SHA-1 is evenly
	94	* distributed, we can check only one and get a reasonable
	95	* estimate.
	96	*/
	97	char path[PATH_MAX];
	98	const char *objdir = get_object_directory();
	99	DIR *dir;
	100	struct dirent *ent;
	101	int auto_threshold;
	102	int num_loose = 0;
	103	int needed = 0;
	104
17815501 JH	105	if (gc_auto_threshold <= 0)
	106	return 0;
	107
2c3c4399	108	if (sizeof(path) <= snprintf(path, sizeof(path), "%s/17", objdir)) {
fea6128b	109	warning(_("insanely long object directory %.*s"), 50, objdir);
2c3c4399 JH	110	return 0;
	111	}
	112	dir = opendir(path);
	113	if (!dir)
	114	return 0;
	115
	116	auto_threshold = (gc_auto_threshold + 255) / 256;
	117	while ((ent = readdir(dir)) != NULL) {
	118	if (strspn(ent->d_name, "0123456789abcdef") != 38 \|\|
	119	ent->d_name[38] != '\0')
	120	continue;
	121	if (++num_loose > auto_threshold) {
	122	needed = 1;
	123	break;
	124	}
	125	}
	126	closedir(dir);
	127	return needed;
	128	}
	129
17815501 JH	130	static int too_many_packs(void)
	131	{
	132	struct packed_git *p;
	133	int cnt;
	134
	135	if (gc_auto_pack_limit <= 0)
	136	return 0;
	137
	138	prepare_packed_git();
	139	for (cnt = 0, p = packed_git; p; p = p->next) {
17815501 JH	140	if (!p->pack_local)
17815501 JH	141	continue;
01af249f	142	if (p->pack_keep)
17815501 JH	143	continue;
	144	/*
	145	* Perhaps check the size of the pack and count only
	146	* very small ones here?
	147	*/
	148	cnt++;
	149	}
	150	return gc_auto_pack_limit <= cnt;
	151	}
	152
7e52f566 JK	153	static void add_repack_all_option(void)
	154	{
	155	if (prune_expire && !strcmp(prune_expire, "now"))
234587fc	156	argv_array_push(&repack, "-a");
7e52f566	157	else {
234587fc JK	158	argv_array_push(&repack, "-A");
	159	if (prune_expire)
	160	argv_array_pushf(&repack, "--unpack-unreachable=%s", prune_expire);
7e52f566 JK	161	}
	162	}
	163
a087cc98 JH	164	static int need_to_gc(void)
	165	{
	166	/*
b14d255b BC	167	* Setting gc.auto to 0 or negative can disable the
b14d255b BC	168	* automatic gc.
a087cc98	169	*/
b14d255b	170	if (gc_auto_threshold <= 0)
95143f9e JH	171	return 0;
95143f9e JH	172
17815501 JH	173	/*
	174	* If there are too many loose objects, but not too many
	175	* packs, we run "repack -d -l". If there are too many packs,
	176	* we run "repack -A -d -l". Otherwise we tell the caller
	177	* there is no need.
	178	*/
17815501	179	if (too_many_packs())
7e52f566	180	add_repack_all_option();
17815501 JH	181	else if (!too_many_loose_objects())
17815501 JH	182	return 0;
bde30540	183
15048f8a	184	if (run_hook_le(NULL, "pre-auto-gc", NULL))
bde30540	185	return 0;
95143f9e	186	return 1;
a087cc98 JH	187	}
a087cc98 JH	188
64a99eb4 NTND	189	/* return NULL on success, else hostname running the gc */
	190	static const char lock_repo_for_gc(int force, pid_t ret_pid)
	191	{
	192	static struct lock_file lock;
64a99eb4 NTND	193	char my_host[128];
	194	struct strbuf sb = STRBUF_INIT;
	195	struct stat st;
	196	uintmax_t pid;
	197	FILE *fp;
4f1c0b21	198	int fd;
64a99eb4	199
4c5baf02 JN	200	if (pidfile)
	201	/* already locked */
	202	return NULL;
	203
64a99eb4 NTND	204	if (gethostname(my_host, sizeof(my_host)))
	205	strcpy(my_host, "unknown");
	206
	207	fd = hold_lock_file_for_update(&lock, git_path("gc.pid"),
	208	LOCK_DIE_ON_ERROR);
	209	if (!force) {
4f1c0b21 EP	210	static char locking_host[128];
4f1c0b21 EP	211	int should_exit;
64a99eb4 NTND	212	fp = fopen(git_path("gc.pid"), "r");
	213	memset(locking_host, 0, sizeof(locking_host));
	214	should_exit =
	215	fp != NULL &&
	216	!fstat(fileno(fp), &st) &&
	217	/*
	218	* 12 hour limit is very generous as gc should
	219	* never take that long. On the other hand we
	220	* don't really need a strict limit here,
	221	* running gc --auto one day late is not a big
	222	* problem. --force can be used in manual gc
	223	* after the user verifies that no gc is
	224	* running.
	225	*/
	226	time(NULL) - st.st_mtime <= 12 * 3600 &&
	227	fscanf(fp, "%"PRIuMAX" %127c", &pid, locking_host) == 2 &&
	228	/* be gentle to concurrent "gc" on remote hosts */
ed7eda8b	229	(strcmp(locking_host, my_host) \|\| !kill(pid, 0) \|\| errno == EPERM);
64a99eb4 NTND	230	if (fp != NULL)
	231	fclose(fp);
	232	if (should_exit) {
	233	if (fd >= 0)
	234	rollback_lock_file(&lock);
	235	*ret_pid = pid;
	236	return locking_host;
	237	}
	238	}
	239
	240	strbuf_addf(&sb, "%"PRIuMAX" %s",
	241	(uintmax_t) getpid(), my_host);
	242	write_in_full(fd, sb.buf, sb.len);
	243	strbuf_release(&sb);
	244	commit_lock_file(&lock);
	245
4c5baf02 JN	246	pidfile = git_pathdup("gc.pid");
	247	sigchain_push_common(remove_pidfile_on_signal);
	248	atexit(remove_pidfile);
	249
64a99eb4 NTND	250	return NULL;
	251	}
	252
62aad184 NTND	253	static int gc_before_repack(void)
	254	{
	255	if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
	256	return error(FAILED_RUN, pack_refs_cmd.argv[0]);
	257
	258	if (prune_reflogs && run_command_v_opt(reflog.argv, RUN_GIT_CMD))
	259	return error(FAILED_RUN, reflog.argv[0]);
	260
	261	pack_refs = 0;
	262	prune_reflogs = 0;
	263	return 0;
	264	}
	265
6757ada4 JB	266	int cmd_gc(int argc, const char *argv, const char prefix)
6757ada4 JB	267	{
44c637c8	268	int aggressive = 0;
2c3c4399	269	int auto_gc = 0;
a0c14cbb	270	int quiet = 0;
64a99eb4 NTND	271	int force = 0;
	272	const char *name;
	273	pid_t pid;
6757ada4	274
44c637c8	275	struct option builtin_gc_options[] = {
6705c162 NTND	276	OPT__QUIET(&quiet, N_("suppress progress reporting")),
	277	{ OPTION_STRING, 0, "prune", &prune_expire, N_("date"),
	278	N_("prune unreferenced objects"),
58e9d9d4	279	PARSE_OPT_OPTARG, NULL, (intptr_t)prune_expire },
d5d09d47 SB	280	OPT_BOOL(0, "aggressive", &aggressive, N_("be more thorough (increased runtime)")),
d5d09d47 SB	281	OPT_BOOL(0, "auto", &auto_gc, N_("enable auto-gc mode")),
64a99eb4	282	OPT_BOOL(0, "force", &force, N_("force running gc even if there may be another gc running")),
44c637c8 JB	283	OPT_END()
	284	};
	285
0c8151b6 NTND	286	if (argc == 2 && !strcmp(argv[1], "-h"))
	287	usage_with_options(builtin_gc_usage, builtin_gc_options);
	288
234587fc JK	289	argv_array_pushl(&pack_refs_cmd, "pack-refs", "--all", "--prune", NULL);
	290	argv_array_pushl(&reflog, "reflog", "expire", "--all", NULL);
	291	argv_array_pushl(&repack, "repack", "-d", "-l", NULL);
2cfe2a78	292	argv_array_pushl(&prune, "prune", "--expire", NULL);
234587fc JK	293	argv_array_pushl(&rerere, "rerere", "gc", NULL);
234587fc JK	294
5801d3b4	295	gc_config();
6757ada4 JB	296
	297	if (pack_refs < 0)
	298	pack_refs = !is_bare_repository();
	299
37782920 SB	300	argc = parse_options(argc, argv, prefix, builtin_gc_options,
37782920 SB	301	builtin_gc_usage, 0);
44c637c8 JB	302	if (argc > 0)
	303	usage_with_options(builtin_gc_usage, builtin_gc_options);
	304
	305	if (aggressive) {
234587fc	306	argv_array_push(&repack, "-f");
125f8146 NTND	307	if (aggressive_depth > 0)
125f8146 NTND	308	argv_array_pushf(&repack, "--depth=%d", aggressive_depth);
234587fc JK	309	if (aggressive_window > 0)
234587fc JK	310	argv_array_pushf(&repack, "--window=%d", aggressive_window);
6757ada4	311	}
a0c14cbb	312	if (quiet)
234587fc	313	argv_array_push(&repack, "-q");
6757ada4	314
2c3c4399 JH	315	if (auto_gc) {
	316	/*
	317	* Auto-gc should be least intrusive as possible.
	318	*/
2c3c4399 JH	319	if (!need_to_gc())
2c3c4399 JH	320	return 0;
9f673f94 NTND	321	if (!quiet) {
	322	if (detach_auto)
	323	fprintf(stderr, _("Auto packing the repository in background for optimum performance.\n"));
	324	else
	325	fprintf(stderr, _("Auto packing the repository for optimum performance.\n"));
	326	fprintf(stderr, _("See \"git help gc\" for manual housekeeping.\n"));
	327	}
62aad184 NTND	328	if (detach_auto) {
	329	if (gc_before_repack())
	330	return -1;
9f673f94 NTND	331	/*
	332	* failure to daemonize is ok, we'll continue
	333	* in foreground
	334	*/
	335	daemonize();
62aad184	336	}
a37cce3b	337	} else
7e52f566	338	add_repack_all_option();
2c3c4399	339
64a99eb4 NTND	340	name = lock_repo_for_gc(force, &pid);
	341	if (name) {
	342	if (auto_gc)
	343	return 0; /* be quiet on --auto */
	344	die(_("gc is already running on machine '%s' pid %"PRIuMAX" (use --force if not)"),
	345	name, (uintmax_t)pid);
	346	}
	347
62aad184 NTND	348	if (gc_before_repack())
62aad184 NTND	349	return -1;
6757ada4	350
234587fc JK	351	if (run_command_v_opt(repack.argv, RUN_GIT_CMD))
234587fc JK	352	return error(FAILED_RUN, repack.argv[0]);
6757ada4	353
58e9d9d4	354	if (prune_expire) {
234587fc	355	argv_array_push(&prune, prune_expire);
bf0a59b3	356	if (quiet)
234587fc JK	357	argv_array_push(&prune, "--no-progress");
	358	if (run_command_v_opt(prune.argv, RUN_GIT_CMD))
	359	return error(FAILED_RUN, prune.argv[0]);
58e9d9d4	360	}
6757ada4	361
234587fc JK	362	if (run_command_v_opt(rerere.argv, RUN_GIT_CMD))
234587fc JK	363	return error(FAILED_RUN, rerere.argv[0]);
6757ada4	364
a087cc98	365	if (auto_gc && too_many_loose_objects())
fea6128b ÆAB	366	warning(_("There are too many unreachable loose objects; "
fea6128b ÆAB	367	"run 'git prune' to remove them."));
a087cc98	368
6757ada4 JB	369	return 0;
6757ada4 JB	370	}