[thirdparty/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 const char *prune_worktrees_expire = "3.months.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 prune_worktrees = 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_date_string("gc.pruneworktreesexpire", &prune_worktrees_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(&prune_worktrees, "worktree", "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 (prune_worktrees_expire) {
		argv_array_push(&prune_worktrees, prune_worktrees_expire);
		if (run_command_v_opt(prune_worktrees.argv, RUN_GIT_CMD))
			return error(FAILED_RUN, prune_worktrees.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[] = {
9c9b4f2f	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";
e3df33bb	36	static const char *prune_worktrees_expire = "3.months.ago";
6757ada4	37
234587fc JK	38	static struct argv_array pack_refs_cmd = ARGV_ARRAY_INIT;
	39	static struct argv_array reflog = ARGV_ARRAY_INIT;
	40	static struct argv_array repack = ARGV_ARRAY_INIT;
	41	static struct argv_array prune = ARGV_ARRAY_INIT;
e3df33bb	42	static struct argv_array prune_worktrees = ARGV_ARRAY_INIT;
234587fc	43	static struct argv_array rerere = ARGV_ARRAY_INIT;
6757ada4	44
4c5baf02 JN	45	static char *pidfile;
	46
	47	static void remove_pidfile(void)
	48	{
	49	if (pidfile)
	50	unlink(pidfile);
	51	}
	52
	53	static void remove_pidfile_on_signal(int signo)
	54	{
	55	remove_pidfile();
	56	sigchain_pop(signo);
	57	raise(signo);
	58	}
	59
09dbb90b NTND	60	static void git_config_date_string(const char key, const char *output)
	61	{
	62	if (git_config_get_string_const(key, output))
	63	return;
	64	if (strcmp(*output, "now")) {
	65	unsigned long now = approxidate("now");
	66	if (approxidate(*output) >= now)
	67	git_die_config(key, _("Invalid %s: '%s'"), key, *output);
	68	}
	69	}
	70
5801d3b4	71	static void gc_config(void)
6757ada4	72	{
5801d3b4 TA	73	const char *value;
	74
	75	if (!git_config_get_value("gc.packrefs", &value)) {
c5e5a2c0	76	if (value && !strcmp(value, "notbare"))
6757ada4 JB	77	pack_refs = -1;
6757ada4 JB	78	else
5801d3b4	79	pack_refs = git_config_bool("gc.packrefs", value);
17815501	80	}
5801d3b4 TA	81
	82	git_config_get_int("gc.aggressivewindow", &aggressive_window);
	83	git_config_get_int("gc.aggressivedepth", &aggressive_depth);
	84	git_config_get_int("gc.auto", &gc_auto_threshold);
	85	git_config_get_int("gc.autopacklimit", &gc_auto_pack_limit);
	86	git_config_get_bool("gc.autodetach", &detach_auto);
09dbb90b	87	git_config_date_string("gc.pruneexpire", &prune_expire);
e3df33bb	88	git_config_date_string("gc.pruneworktreesexpire", &prune_worktrees_expire);
5801d3b4	89	git_config(git_default_config, NULL);
6757ada4 JB	90	}
6757ada4 JB	91
a087cc98	92	static int too_many_loose_objects(void)
2c3c4399 JH	93	{
	94	/*
	95	* Quickly check if a "gc" is needed, by estimating how
	96	* many loose objects there are. Because SHA-1 is evenly
	97	* distributed, we can check only one and get a reasonable
	98	* estimate.
	99	*/
	100	char path[PATH_MAX];
	101	const char *objdir = get_object_directory();
	102	DIR *dir;
	103	struct dirent *ent;
	104	int auto_threshold;
	105	int num_loose = 0;
	106	int needed = 0;
	107
17815501 JH	108	if (gc_auto_threshold <= 0)
	109	return 0;
	110
2c3c4399	111	if (sizeof(path) <= snprintf(path, sizeof(path), "%s/17", objdir)) {
fea6128b	112	warning(_("insanely long object directory %.*s"), 50, objdir);
2c3c4399 JH	113	return 0;
	114	}
	115	dir = opendir(path);
	116	if (!dir)
	117	return 0;
	118
	119	auto_threshold = (gc_auto_threshold + 255) / 256;
	120	while ((ent = readdir(dir)) != NULL) {
	121	if (strspn(ent->d_name, "0123456789abcdef") != 38 \|\|
	122	ent->d_name[38] != '\0')
	123	continue;
	124	if (++num_loose > auto_threshold) {
	125	needed = 1;
	126	break;
	127	}
	128	}
	129	closedir(dir);
	130	return needed;
	131	}
	132
17815501 JH	133	static int too_many_packs(void)
	134	{
	135	struct packed_git *p;
	136	int cnt;
	137
	138	if (gc_auto_pack_limit <= 0)
	139	return 0;
	140
	141	prepare_packed_git();
	142	for (cnt = 0, p = packed_git; p; p = p->next) {
17815501 JH	143	if (!p->pack_local)
17815501 JH	144	continue;
01af249f	145	if (p->pack_keep)
17815501 JH	146	continue;
	147	/*
	148	* Perhaps check the size of the pack and count only
	149	* very small ones here?
	150	*/
	151	cnt++;
	152	}
	153	return gc_auto_pack_limit <= cnt;
	154	}
	155
7e52f566 JK	156	static void add_repack_all_option(void)
	157	{
	158	if (prune_expire && !strcmp(prune_expire, "now"))
234587fc	159	argv_array_push(&repack, "-a");
7e52f566	160	else {
234587fc JK	161	argv_array_push(&repack, "-A");
	162	if (prune_expire)
	163	argv_array_pushf(&repack, "--unpack-unreachable=%s", prune_expire);
7e52f566 JK	164	}
	165	}
	166
a087cc98 JH	167	static int need_to_gc(void)
	168	{
	169	/*
b14d255b BC	170	* Setting gc.auto to 0 or negative can disable the
b14d255b BC	171	* automatic gc.
a087cc98	172	*/
b14d255b	173	if (gc_auto_threshold <= 0)
95143f9e JH	174	return 0;
95143f9e JH	175
17815501 JH	176	/*
	177	* If there are too many loose objects, but not too many
	178	* packs, we run "repack -d -l". If there are too many packs,
	179	* we run "repack -A -d -l". Otherwise we tell the caller
	180	* there is no need.
	181	*/
17815501	182	if (too_many_packs())
7e52f566	183	add_repack_all_option();
17815501 JH	184	else if (!too_many_loose_objects())
17815501 JH	185	return 0;
bde30540	186
15048f8a	187	if (run_hook_le(NULL, "pre-auto-gc", NULL))
bde30540	188	return 0;
95143f9e	189	return 1;
a087cc98 JH	190	}
a087cc98 JH	191
64a99eb4 NTND	192	/* return NULL on success, else hostname running the gc */
	193	static const char lock_repo_for_gc(int force, pid_t ret_pid)
	194	{
	195	static struct lock_file lock;
64a99eb4 NTND	196	char my_host[128];
	197	struct strbuf sb = STRBUF_INIT;
	198	struct stat st;
	199	uintmax_t pid;
	200	FILE *fp;
4f1c0b21	201	int fd;
64a99eb4	202
4c5baf02 JN	203	if (pidfile)
	204	/* already locked */
	205	return NULL;
	206
64a99eb4 NTND	207	if (gethostname(my_host, sizeof(my_host)))
	208	strcpy(my_host, "unknown");
	209
	210	fd = hold_lock_file_for_update(&lock, git_path("gc.pid"),
	211	LOCK_DIE_ON_ERROR);
	212	if (!force) {
4f1c0b21 EP	213	static char locking_host[128];
4f1c0b21 EP	214	int should_exit;
64a99eb4 NTND	215	fp = fopen(git_path("gc.pid"), "r");
	216	memset(locking_host, 0, sizeof(locking_host));
	217	should_exit =
	218	fp != NULL &&
	219	!fstat(fileno(fp), &st) &&
	220	/*
	221	* 12 hour limit is very generous as gc should
	222	* never take that long. On the other hand we
	223	* don't really need a strict limit here,
	224	* running gc --auto one day late is not a big
	225	* problem. --force can be used in manual gc
	226	* after the user verifies that no gc is
	227	* running.
	228	*/
	229	time(NULL) - st.st_mtime <= 12 * 3600 &&
	230	fscanf(fp, "%"PRIuMAX" %127c", &pid, locking_host) == 2 &&
	231	/* be gentle to concurrent "gc" on remote hosts */
ed7eda8b	232	(strcmp(locking_host, my_host) \|\| !kill(pid, 0) \|\| errno == EPERM);
64a99eb4 NTND	233	if (fp != NULL)
	234	fclose(fp);
	235	if (should_exit) {
	236	if (fd >= 0)
	237	rollback_lock_file(&lock);
	238	*ret_pid = pid;
	239	return locking_host;
	240	}
	241	}
	242
	243	strbuf_addf(&sb, "%"PRIuMAX" %s",
	244	(uintmax_t) getpid(), my_host);
	245	write_in_full(fd, sb.buf, sb.len);
	246	strbuf_release(&sb);
	247	commit_lock_file(&lock);
	248
4c5baf02 JN	249	pidfile = git_pathdup("gc.pid");
	250	sigchain_push_common(remove_pidfile_on_signal);
	251	atexit(remove_pidfile);
	252
64a99eb4 NTND	253	return NULL;
	254	}
	255
62aad184 NTND	256	static int gc_before_repack(void)
	257	{
	258	if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
	259	return error(FAILED_RUN, pack_refs_cmd.argv[0]);
	260
	261	if (prune_reflogs && run_command_v_opt(reflog.argv, RUN_GIT_CMD))
	262	return error(FAILED_RUN, reflog.argv[0]);
	263
	264	pack_refs = 0;
	265	prune_reflogs = 0;
	266	return 0;
	267	}
	268
6757ada4 JB	269	int cmd_gc(int argc, const char *argv, const char prefix)
6757ada4 JB	270	{
44c637c8	271	int aggressive = 0;
2c3c4399	272	int auto_gc = 0;
a0c14cbb	273	int quiet = 0;
64a99eb4 NTND	274	int force = 0;
	275	const char *name;
	276	pid_t pid;
6757ada4	277
44c637c8	278	struct option builtin_gc_options[] = {
6705c162 NTND	279	OPT__QUIET(&quiet, N_("suppress progress reporting")),
	280	{ OPTION_STRING, 0, "prune", &prune_expire, N_("date"),
	281	N_("prune unreferenced objects"),
58e9d9d4	282	PARSE_OPT_OPTARG, NULL, (intptr_t)prune_expire },
d5d09d47 SB	283	OPT_BOOL(0, "aggressive", &aggressive, N_("be more thorough (increased runtime)")),
d5d09d47 SB	284	OPT_BOOL(0, "auto", &auto_gc, N_("enable auto-gc mode")),
64a99eb4	285	OPT_BOOL(0, "force", &force, N_("force running gc even if there may be another gc running")),
44c637c8 JB	286	OPT_END()
	287	};
	288
0c8151b6 NTND	289	if (argc == 2 && !strcmp(argv[1], "-h"))
	290	usage_with_options(builtin_gc_usage, builtin_gc_options);
	291
234587fc JK	292	argv_array_pushl(&pack_refs_cmd, "pack-refs", "--all", "--prune", NULL);
	293	argv_array_pushl(&reflog, "reflog", "expire", "--all", NULL);
	294	argv_array_pushl(&repack, "repack", "-d", "-l", NULL);
2cfe2a78	295	argv_array_pushl(&prune, "prune", "--expire", NULL);
df0b6cfb	296	argv_array_pushl(&prune_worktrees, "worktree", "prune", "--expire", NULL);
234587fc JK	297	argv_array_pushl(&rerere, "rerere", "gc", NULL);
234587fc JK	298
5801d3b4	299	gc_config();
6757ada4 JB	300
	301	if (pack_refs < 0)
	302	pack_refs = !is_bare_repository();
	303
37782920 SB	304	argc = parse_options(argc, argv, prefix, builtin_gc_options,
37782920 SB	305	builtin_gc_usage, 0);
44c637c8 JB	306	if (argc > 0)
	307	usage_with_options(builtin_gc_usage, builtin_gc_options);
	308
	309	if (aggressive) {
234587fc	310	argv_array_push(&repack, "-f");
125f8146 NTND	311	if (aggressive_depth > 0)
125f8146 NTND	312	argv_array_pushf(&repack, "--depth=%d", aggressive_depth);
234587fc JK	313	if (aggressive_window > 0)
234587fc JK	314	argv_array_pushf(&repack, "--window=%d", aggressive_window);
6757ada4	315	}
a0c14cbb	316	if (quiet)
234587fc	317	argv_array_push(&repack, "-q");
6757ada4	318
2c3c4399 JH	319	if (auto_gc) {
	320	/*
	321	* Auto-gc should be least intrusive as possible.
	322	*/
2c3c4399 JH	323	if (!need_to_gc())
2c3c4399 JH	324	return 0;
9f673f94 NTND	325	if (!quiet) {
	326	if (detach_auto)
	327	fprintf(stderr, _("Auto packing the repository in background for optimum performance.\n"));
	328	else
	329	fprintf(stderr, _("Auto packing the repository for optimum performance.\n"));
	330	fprintf(stderr, _("See \"git help gc\" for manual housekeeping.\n"));
	331	}
62aad184 NTND	332	if (detach_auto) {
	333	if (gc_before_repack())
	334	return -1;
9f673f94 NTND	335	/*
	336	* failure to daemonize is ok, we'll continue
	337	* in foreground
	338	*/
	339	daemonize();
62aad184	340	}
a37cce3b	341	} else
7e52f566	342	add_repack_all_option();
2c3c4399	343
64a99eb4 NTND	344	name = lock_repo_for_gc(force, &pid);
	345	if (name) {
	346	if (auto_gc)
	347	return 0; /* be quiet on --auto */
	348	die(_("gc is already running on machine '%s' pid %"PRIuMAX" (use --force if not)"),
	349	name, (uintmax_t)pid);
	350	}
	351
62aad184 NTND	352	if (gc_before_repack())
62aad184 NTND	353	return -1;
6757ada4	354
234587fc JK	355	if (run_command_v_opt(repack.argv, RUN_GIT_CMD))
234587fc JK	356	return error(FAILED_RUN, repack.argv[0]);
6757ada4	357
58e9d9d4	358	if (prune_expire) {
234587fc	359	argv_array_push(&prune, prune_expire);
bf0a59b3	360	if (quiet)
234587fc JK	361	argv_array_push(&prune, "--no-progress");
	362	if (run_command_v_opt(prune.argv, RUN_GIT_CMD))
	363	return error(FAILED_RUN, prune.argv[0]);
58e9d9d4	364	}
6757ada4	365
e3df33bb NTND	366	if (prune_worktrees_expire) {
	367	argv_array_push(&prune_worktrees, prune_worktrees_expire);
	368	if (run_command_v_opt(prune_worktrees.argv, RUN_GIT_CMD))
	369	return error(FAILED_RUN, prune_worktrees.argv[0]);
	370	}
	371
234587fc JK	372	if (run_command_v_opt(rerere.argv, RUN_GIT_CMD))
234587fc JK	373	return error(FAILED_RUN, rerere.argv[0]);
6757ada4	374
a087cc98	375	if (auto_gc && too_many_loose_objects())
fea6128b ÆAB	376	warning(_("There are too many unreachable loose objects; "
fea6128b ÆAB	377	"run 'git prune' to remove them."));
a087cc98	378
6757ada4 JB	379	return 0;
6757ada4 JB	380	}