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gc.c
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/*
* 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
*/
#define USE_THE_REPOSITORY_VARIABLE
#define DISABLE_SIGN_COMPARE_WARNINGS
#include "builtin.h"
#include "abspath.h"
#include "date.h"
#include "environment.h"
#include "hex.h"
#include "config.h"
#include "tempfile.h"
#include "lockfile.h"
#include "parse-options.h"
#include "run-command.h"
#include "sigchain.h"
#include "strvec.h"
#include "commit.h"
#include "commit-graph.h"
#include "packfile.h"
#include "object-file.h"
#include "object-store-ll.h"
#include "pack.h"
#include "pack-objects.h"
#include "path.h"
#include "blob.h"
#include "tree.h"
#include "promisor-remote.h"
#include "refs.h"
#include "remote.h"
#include "exec-cmd.h"
#include "gettext.h"
#include "hook.h"
#include "setup.h"
#include "trace2.h"
#define FAILED_RUN "failed to run %s"
static const char * const builtin_gc_usage[] = {
N_("git gc [<options>]"),
NULL
};
static timestamp_t gc_log_expire_time;
static struct strvec reflog = STRVEC_INIT;
static struct strvec repack = STRVEC_INIT;
static struct strvec prune = STRVEC_INIT;
static struct strvec prune_worktrees = STRVEC_INIT;
static struct strvec rerere = STRVEC_INIT;
static struct tempfile *pidfile;
static struct lock_file log_lock;
static struct string_list pack_garbage = STRING_LIST_INIT_DUP;
static void clean_pack_garbage(void)
{
int i;
for (i = 0; i < pack_garbage.nr; i++)
unlink_or_warn(pack_garbage.items[i].string);
string_list_clear(&pack_garbage, 0);
}
static void report_pack_garbage(unsigned seen_bits, const char *path)
{
if (seen_bits == PACKDIR_FILE_IDX)
string_list_append(&pack_garbage, path);
}
static void process_log_file(void)
{
struct stat st;
if (fstat(get_lock_file_fd(&log_lock), &st)) {
/*
* Perhaps there was an i/o error or another
* unlikely situation. Try to make a note of
* this in gc.log along with any existing
* messages.
*/
int saved_errno = errno;
fprintf(stderr, _("Failed to fstat %s: %s"),
get_lock_file_path(&log_lock),
strerror(saved_errno));
fflush(stderr);
commit_lock_file(&log_lock);
errno = saved_errno;
} else if (st.st_size) {
/* There was some error recorded in the lock file */
commit_lock_file(&log_lock);
} else {
char *path = repo_git_path(the_repository, "gc.log");
/* No error, clean up any old gc.log */
unlink(path);
rollback_lock_file(&log_lock);
free(path);
}
}
static void process_log_file_at_exit(void)
{
fflush(stderr);
process_log_file();
}
static int gc_config_is_timestamp_never(const char *var)
{
const char *value;
timestamp_t expire;
if (!git_config_get_value(var, &value) && value) {
if (parse_expiry_date(value, &expire))
die(_("failed to parse '%s' value '%s'"), var, value);
return expire == 0;
}
return 0;
}
struct gc_config {
int pack_refs;
int prune_reflogs;
int cruft_packs;
unsigned long max_cruft_size;
int aggressive_depth;
int aggressive_window;
int gc_auto_threshold;
int gc_auto_pack_limit;
int detach_auto;
char *gc_log_expire;
char *prune_expire;
char *prune_worktrees_expire;
char *repack_filter;
char *repack_filter_to;
char *repack_expire_to;
unsigned long big_pack_threshold;
unsigned long max_delta_cache_size;
/*
* Remove this member from gc_config once repo_settings is passed
* through the callchain.
*/
size_t delta_base_cache_limit;
};
#define GC_CONFIG_INIT { \
.pack_refs = 1, \
.prune_reflogs = 1, \
.cruft_packs = 1, \
.aggressive_depth = 50, \
.aggressive_window = 250, \
.gc_auto_threshold = 6700, \
.gc_auto_pack_limit = 50, \
.detach_auto = 1, \
.gc_log_expire = xstrdup("1.day.ago"), \
.prune_expire = xstrdup("2.weeks.ago"), \
.prune_worktrees_expire = xstrdup("3.months.ago"), \
.max_delta_cache_size = DEFAULT_DELTA_CACHE_SIZE, \
.delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT, \
}
static void gc_config_release(struct gc_config *cfg)
{
free(cfg->gc_log_expire);
free(cfg->prune_expire);
free(cfg->prune_worktrees_expire);
free(cfg->repack_filter);
free(cfg->repack_filter_to);
}
static void gc_config(struct gc_config *cfg)
{
const char *value;
char *owned = NULL;
unsigned long ulongval;
if (!git_config_get_value("gc.packrefs", &value)) {
if (value && !strcmp(value, "notbare"))
cfg->pack_refs = -1;
else
cfg->pack_refs = git_config_bool("gc.packrefs", value);
}
if (gc_config_is_timestamp_never("gc.reflogexpire") &&
gc_config_is_timestamp_never("gc.reflogexpireunreachable"))
cfg->prune_reflogs = 0;
git_config_get_int("gc.aggressivewindow", &cfg->aggressive_window);
git_config_get_int("gc.aggressivedepth", &cfg->aggressive_depth);
git_config_get_int("gc.auto", &cfg->gc_auto_threshold);
git_config_get_int("gc.autopacklimit", &cfg->gc_auto_pack_limit);
git_config_get_bool("gc.autodetach", &cfg->detach_auto);
git_config_get_bool("gc.cruftpacks", &cfg->cruft_packs);
git_config_get_ulong("gc.maxcruftsize", &cfg->max_cruft_size);
if (!repo_config_get_expiry(the_repository, "gc.pruneexpire", &owned)) {
free(cfg->prune_expire);
cfg->prune_expire = owned;
}
if (!repo_config_get_expiry(the_repository, "gc.worktreepruneexpire", &owned)) {
free(cfg->prune_worktrees_expire);
cfg->prune_worktrees_expire = owned;
}
if (!repo_config_get_expiry(the_repository, "gc.logexpiry", &owned)) {
free(cfg->gc_log_expire);
cfg->gc_log_expire = owned;
}
git_config_get_ulong("gc.bigpackthreshold", &cfg->big_pack_threshold);
git_config_get_ulong("pack.deltacachesize", &cfg->max_delta_cache_size);
if (!git_config_get_ulong("core.deltabasecachelimit", &ulongval))
cfg->delta_base_cache_limit = ulongval;
if (!git_config_get_string("gc.repackfilter", &owned)) {
free(cfg->repack_filter);
cfg->repack_filter = owned;
}
if (!git_config_get_string("gc.repackfilterto", &owned)) {
free(cfg->repack_filter_to);
cfg->repack_filter_to = owned;
}
git_config(git_default_config, NULL);
}
enum schedule_priority {
SCHEDULE_NONE = 0,
SCHEDULE_WEEKLY = 1,
SCHEDULE_DAILY = 2,
SCHEDULE_HOURLY = 3,
};
static enum schedule_priority parse_schedule(const char *value)
{
if (!value)
return SCHEDULE_NONE;
if (!strcasecmp(value, "hourly"))
return SCHEDULE_HOURLY;
if (!strcasecmp(value, "daily"))
return SCHEDULE_DAILY;
if (!strcasecmp(value, "weekly"))
return SCHEDULE_WEEKLY;
return SCHEDULE_NONE;
}
struct maintenance_run_opts {
int auto_flag;
int detach;
int quiet;
enum schedule_priority schedule;
};
#define MAINTENANCE_RUN_OPTS_INIT { \
.detach = -1, \
}
static int pack_refs_condition(UNUSED struct gc_config *cfg)
{
/*
* The auto-repacking logic for refs is handled by the ref backends and
* exposed via `git pack-refs --auto`. We thus always return truish
* here and let the backend decide for us.
*/
return 1;
}
static int maintenance_task_pack_refs(struct maintenance_run_opts *opts,
UNUSED struct gc_config *cfg)
{
struct child_process cmd = CHILD_PROCESS_INIT;
cmd.git_cmd = 1;
strvec_pushl(&cmd.args, "pack-refs", "--all", "--prune", NULL);
if (opts->auto_flag)
strvec_push(&cmd.args, "--auto");
return run_command(&cmd);
}
static int too_many_loose_objects(struct gc_config *cfg)
{
/*
* 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.
*/
DIR *dir;
struct dirent *ent;
int auto_threshold;
int num_loose = 0;
int needed = 0;
const unsigned hexsz_loose = the_hash_algo->hexsz - 2;
char *path;
path = repo_git_path(the_repository, "objects/17");
dir = opendir(path);
free(path);
if (!dir)
return 0;
auto_threshold = DIV_ROUND_UP(cfg->gc_auto_threshold, 256);
while ((ent = readdir(dir)) != NULL) {
if (strspn(ent->d_name, "0123456789abcdef") != hexsz_loose ||
ent->d_name[hexsz_loose] != '\0')
continue;
if (++num_loose > auto_threshold) {
needed = 1;
break;
}
}
closedir(dir);
return needed;
}
static struct packed_git *find_base_packs(struct string_list *packs,
unsigned long limit)
{
struct packed_git *p, *base = NULL;
for (p = get_all_packs(the_repository); p; p = p->next) {
if (!p->pack_local || p->is_cruft)
continue;
if (limit) {
if (p->pack_size >= limit)
string_list_append(packs, p->pack_name);
} else if (!base || base->pack_size < p->pack_size) {
base = p;
}
}
if (base)
string_list_append(packs, base->pack_name);
return base;
}
static int too_many_packs(struct gc_config *cfg)
{
struct packed_git *p;
int cnt;
if (cfg->gc_auto_pack_limit <= 0)
return 0;
for (cnt = 0, p = get_all_packs(the_repository); 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 cfg->gc_auto_pack_limit < cnt;
}
static uint64_t total_ram(void)
{
#if defined(HAVE_SYSINFO)
struct sysinfo si;
if (!sysinfo(&si))
return si.totalram;
#elif defined(HAVE_BSD_SYSCTL) && (defined(HW_MEMSIZE) || defined(HW_PHYSMEM))
int64_t physical_memory;
int mib[2];
size_t length;
mib[0] = CTL_HW;
# if defined(HW_MEMSIZE)
mib[1] = HW_MEMSIZE;
# else
mib[1] = HW_PHYSMEM;
# endif
length = sizeof(int64_t);
if (!sysctl(mib, 2, &physical_memory, &length, NULL, 0))
return physical_memory;
#elif defined(GIT_WINDOWS_NATIVE)
MEMORYSTATUSEX memInfo;
memInfo.dwLength = sizeof(MEMORYSTATUSEX);
if (GlobalMemoryStatusEx(&memInfo))
return memInfo.ullTotalPhys;
#endif
return 0;
}
static uint64_t estimate_repack_memory(struct gc_config *cfg,
struct packed_git *pack)
{
unsigned long nr_objects = repo_approximate_object_count(the_repository);
size_t os_cache, heap;
if (!pack || !nr_objects)
return 0;
/*
* First we have to scan through at least one pack.
* Assume enough room in OS file cache to keep the entire pack
* or we may accidentally evict data of other processes from
* the cache.
*/
os_cache = pack->pack_size + pack->index_size;
/* then pack-objects needs lots more for book keeping */
heap = sizeof(struct object_entry) * nr_objects;
/*
* internal rev-list --all --objects takes up some memory too,
* let's say half of it is for blobs
*/
heap += sizeof(struct blob) * nr_objects / 2;
/*
* and the other half is for trees (commits and tags are
* usually insignificant)
*/
heap += sizeof(struct tree) * nr_objects / 2;
/* and then obj_hash[], underestimated in fact */
heap += sizeof(struct object *) * nr_objects;
/* revindex is used also */
heap += (sizeof(off_t) + sizeof(uint32_t)) * nr_objects;
/*
* read_sha1_file() (either at delta calculation phase, or
* writing phase) also fills up the delta base cache
*/
heap += cfg->delta_base_cache_limit;
/* and of course pack-objects has its own delta cache */
heap += cfg->max_delta_cache_size;
return os_cache + heap;
}
static int keep_one_pack(struct string_list_item *item, void *data UNUSED)
{
strvec_pushf(&repack, "--keep-pack=%s", basename(item->string));
return 0;
}
static void add_repack_all_option(struct gc_config *cfg,
struct string_list *keep_pack)
{
if (cfg->prune_expire && !strcmp(cfg->prune_expire, "now")
&& !(cfg->cruft_packs && cfg->repack_expire_to))
strvec_push(&repack, "-a");
else if (cfg->cruft_packs) {
strvec_push(&repack, "--cruft");
if (cfg->prune_expire)
strvec_pushf(&repack, "--cruft-expiration=%s", cfg->prune_expire);
if (cfg->max_cruft_size)
strvec_pushf(&repack, "--max-cruft-size=%lu",
cfg->max_cruft_size);
if (cfg->repack_expire_to)
strvec_pushf(&repack, "--expire-to=%s", cfg->repack_expire_to);
} else {
strvec_push(&repack, "-A");
if (cfg->prune_expire)
strvec_pushf(&repack, "--unpack-unreachable=%s", cfg->prune_expire);
}
if (keep_pack)
for_each_string_list(keep_pack, keep_one_pack, NULL);
if (cfg->repack_filter && *cfg->repack_filter)
strvec_pushf(&repack, "--filter=%s", cfg->repack_filter);
if (cfg->repack_filter_to && *cfg->repack_filter_to)
strvec_pushf(&repack, "--filter-to=%s", cfg->repack_filter_to);
}
static void add_repack_incremental_option(void)
{
strvec_push(&repack, "--no-write-bitmap-index");
}
static int need_to_gc(struct gc_config *cfg)
{
/*
* Setting gc.auto to 0 or negative can disable the
* automatic gc.
*/
if (cfg->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(cfg)) {
struct string_list keep_pack = STRING_LIST_INIT_NODUP;
if (cfg->big_pack_threshold) {
find_base_packs(&keep_pack, cfg->big_pack_threshold);
if (keep_pack.nr >= cfg->gc_auto_pack_limit) {
cfg->big_pack_threshold = 0;
string_list_clear(&keep_pack, 0);
find_base_packs(&keep_pack, 0);
}
} else {
struct packed_git *p = find_base_packs(&keep_pack, 0);
uint64_t mem_have, mem_want;
mem_have = total_ram();
mem_want = estimate_repack_memory(cfg, p);
/*
* Only allow 1/2 of memory for pack-objects, leave
* the rest for the OS and other processes in the
* system.
*/
if (!mem_have || mem_want < mem_have / 2)
string_list_clear(&keep_pack, 0);
}
add_repack_all_option(cfg, &keep_pack);
string_list_clear(&keep_pack, 0);
} else if (too_many_loose_objects(cfg))
add_repack_incremental_option();
else
return 0;
if (run_hooks(the_repository, "pre-auto-gc"))
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)
{
struct lock_file lock = LOCK_INIT;
char my_host[HOST_NAME_MAX + 1];
struct strbuf sb = STRBUF_INIT;
struct stat st;
uintmax_t pid;
FILE *fp;
int fd;
char *pidfile_path;
if (is_tempfile_active(pidfile))
/* already locked */
return NULL;
if (xgethostname(my_host, sizeof(my_host)))
xsnprintf(my_host, sizeof(my_host), "unknown");
pidfile_path = repo_git_path(the_repository, "gc.pid");
fd = hold_lock_file_for_update(&lock, pidfile_path,
LOCK_DIE_ON_ERROR);
if (!force) {
static char locking_host[HOST_NAME_MAX + 1];
static char *scan_fmt;
int should_exit;
if (!scan_fmt)
scan_fmt = xstrfmt("%s %%%ds", "%"SCNuMAX, HOST_NAME_MAX);
fp = fopen(pidfile_path, "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, scan_fmt, &pid, locking_host) == 2 &&
/* be gentle to concurrent "gc" on remote hosts */
(strcmp(locking_host, my_host) || !kill(pid, 0) || errno == EPERM);
if (fp)
fclose(fp);
if (should_exit) {
if (fd >= 0)
rollback_lock_file(&lock);
*ret_pid = pid;
free(pidfile_path);
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 = register_tempfile(pidfile_path);
free(pidfile_path);
return NULL;
}
/*
* Returns 0 if there was no previous error and gc can proceed, 1 if
* gc should not proceed due to an error in the last run. Prints a
* message and returns with a non-[01] status code if an error occurred
* while reading gc.log
*/
static int report_last_gc_error(void)
{
struct strbuf sb = STRBUF_INIT;
int ret = 0;
ssize_t len;
struct stat st;
char *gc_log_path = repo_git_path(the_repository, "gc.log");
if (stat(gc_log_path, &st)) {
if (errno == ENOENT)
goto done;
ret = die_message_errno(_("cannot stat '%s'"), gc_log_path);
goto done;
}
if (st.st_mtime < gc_log_expire_time)
goto done;
len = strbuf_read_file(&sb, gc_log_path, 0);
if (len < 0)
ret = die_message_errno(_("cannot read '%s'"), gc_log_path);
else if (len > 0) {
/*
* A previous gc failed. Report the error, and don't
* bother with an automatic gc run since it is likely
* to fail in the same way.
*/
warning(_("The last gc run reported the following. "
"Please correct the root cause\n"
"and remove %s\n"
"Automatic cleanup will not be performed "
"until the file is removed.\n\n"
"%s"),
gc_log_path, sb.buf);
ret = 1;
}
strbuf_release(&sb);
done:
free(gc_log_path);
return ret;
}
static void gc_before_repack(struct maintenance_run_opts *opts,
struct gc_config *cfg)
{
/*
* We may be called twice, as both the pre- and
* post-daemonized phases will call us, but running these
* commands more than once is pointless and wasteful.
*/
static int done = 0;
if (done++)
return;
if (cfg->pack_refs && maintenance_task_pack_refs(opts, cfg))
die(FAILED_RUN, "pack-refs");
if (cfg->prune_reflogs) {
struct child_process cmd = CHILD_PROCESS_INIT;
cmd.git_cmd = 1;
strvec_pushv(&cmd.args, reflog.v);
if (run_command(&cmd))
die(FAILED_RUN, reflog.v[0]);
}
}
int cmd_gc(int argc,
const char **argv,
const char *prefix,
struct repository *repo UNUSED)
{
int aggressive = 0;
int quiet = 0;
int force = 0;
const char *name;
pid_t pid;
int daemonized = 0;
int keep_largest_pack = -1;
timestamp_t dummy;
struct child_process rerere_cmd = CHILD_PROCESS_INIT;
struct maintenance_run_opts opts = MAINTENANCE_RUN_OPTS_INIT;
struct gc_config cfg = GC_CONFIG_INIT;
const char *prune_expire_sentinel = "sentinel";
const char *prune_expire_arg = prune_expire_sentinel;
int ret;
struct option builtin_gc_options[] = {
OPT__QUIET(&quiet, N_("suppress progress reporting")),
{ OPTION_STRING, 0, "prune", &prune_expire_arg, N_("date"),
N_("prune unreferenced objects"),
PARSE_OPT_OPTARG, NULL, (intptr_t)prune_expire_arg },
OPT_BOOL(0, "cruft", &cfg.cruft_packs, N_("pack unreferenced objects separately")),
OPT_MAGNITUDE(0, "max-cruft-size", &cfg.max_cruft_size,
N_("with --cruft, limit the size of new cruft packs")),
OPT_BOOL(0, "aggressive", &aggressive, N_("be more thorough (increased runtime)")),
OPT_BOOL_F(0, "auto", &opts.auto_flag, N_("enable auto-gc mode"),
PARSE_OPT_NOCOMPLETE),
OPT_BOOL(0, "detach", &opts.detach,
N_("perform garbage collection in the background")),
OPT_BOOL_F(0, "force", &force,
N_("force running gc even if there may be another gc running"),
PARSE_OPT_NOCOMPLETE),
OPT_BOOL(0, "keep-largest-pack", &keep_largest_pack,
N_("repack all other packs except the largest pack")),
OPT_STRING(0, "expire-to", &cfg.repack_expire_to, N_("dir"),
N_("pack prefix to store a pack containing pruned objects")),
OPT_END()
};
show_usage_with_options_if_asked(argc, argv,
builtin_gc_usage, builtin_gc_options);
strvec_pushl(&reflog, "reflog", "expire", "--all", NULL);
strvec_pushl(&repack, "repack", "-d", "-l", NULL);
strvec_pushl(&prune, "prune", "--expire", NULL);
strvec_pushl(&prune_worktrees, "worktree", "prune", "--expire", NULL);
strvec_pushl(&rerere, "rerere", "gc", NULL);
gc_config(&cfg);
if (parse_expiry_date(cfg.gc_log_expire, &gc_log_expire_time))
die(_("failed to parse gc.logExpiry value %s"), cfg.gc_log_expire);
if (cfg.pack_refs < 0)
cfg.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 (prune_expire_arg != prune_expire_sentinel) {
free(cfg.prune_expire);
cfg.prune_expire = xstrdup_or_null(prune_expire_arg);
}
if (cfg.prune_expire && parse_expiry_date(cfg.prune_expire, &dummy))
die(_("failed to parse prune expiry value %s"), cfg.prune_expire);
if (aggressive) {
strvec_push(&repack, "-f");
if (cfg.aggressive_depth > 0)
strvec_pushf(&repack, "--depth=%d", cfg.aggressive_depth);
if (cfg.aggressive_window > 0)
strvec_pushf(&repack, "--window=%d", cfg.aggressive_window);
}
if (quiet)
strvec_push(&repack, "-q");
if (opts.auto_flag) {
if (cfg.detach_auto && opts.detach < 0)
opts.detach = 1;
/*
* Auto-gc should be least intrusive as possible.
*/
if (!need_to_gc(&cfg)) {
ret = 0;
goto out;
}
if (!quiet) {
if (opts.detach > 0)
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"));
}
} else {
struct string_list keep_pack = STRING_LIST_INIT_NODUP;
if (keep_largest_pack != -1) {
if (keep_largest_pack)
find_base_packs(&keep_pack, 0);
} else if (cfg.big_pack_threshold) {
find_base_packs(&keep_pack, cfg.big_pack_threshold);
}
add_repack_all_option(&cfg, &keep_pack);
string_list_clear(&keep_pack, 0);
}
if (opts.detach > 0) {
ret = report_last_gc_error();
if (ret == 1) {
/* Last gc --auto failed. Skip this one. */
ret = 0;
goto out;
} else if (ret) {
/* an I/O error occurred, already reported */
goto out;
}
if (lock_repo_for_gc(force, &pid)) {
ret = 0;
goto out;
}
gc_before_repack(&opts, &cfg); /* dies on failure */
delete_tempfile(&pidfile);
/*
* failure to daemonize is ok, we'll continue
* in foreground
*/
daemonized = !daemonize();
}
name = lock_repo_for_gc(force, &pid);
if (name) {
if (opts.auto_flag) {
ret = 0;
goto out; /* be quiet on --auto */
}
die(_("gc is already running on machine '%s' pid %"PRIuMAX" (use --force if not)"),
name, (uintmax_t)pid);
}
if (daemonized) {
char *path = repo_git_path(the_repository, "gc.log");
hold_lock_file_for_update(&log_lock, path,
LOCK_DIE_ON_ERROR);
dup2(get_lock_file_fd(&log_lock), 2);
atexit(process_log_file_at_exit);
free(path);
}
gc_before_repack(&opts, &cfg);
if (!repository_format_precious_objects) {
struct child_process repack_cmd = CHILD_PROCESS_INIT;
repack_cmd.git_cmd = 1;
repack_cmd.close_object_store = 1;
strvec_pushv(&repack_cmd.args, repack.v);
if (run_command(&repack_cmd))
die(FAILED_RUN, repack.v[0]);
if (cfg.prune_expire) {
struct child_process prune_cmd = CHILD_PROCESS_INIT;
/* run `git prune` even if using cruft packs */
strvec_push(&prune, cfg.prune_expire);
if (quiet)
strvec_push(&prune, "--no-progress");
if (repo_has_promisor_remote(the_repository))
strvec_push(&prune,
"--exclude-promisor-objects");
prune_cmd.git_cmd = 1;
strvec_pushv(&prune_cmd.args, prune.v);
if (run_command(&prune_cmd))
die(FAILED_RUN, prune.v[0]);
}
}
if (cfg.prune_worktrees_expire) {
struct child_process prune_worktrees_cmd = CHILD_PROCESS_INIT;
strvec_push(&prune_worktrees, cfg.prune_worktrees_expire);
prune_worktrees_cmd.git_cmd = 1;
strvec_pushv(&prune_worktrees_cmd.args, prune_worktrees.v);
if (run_command(&prune_worktrees_cmd))
die(FAILED_RUN, prune_worktrees.v[0]);
}
rerere_cmd.git_cmd = 1;
strvec_pushv(&rerere_cmd.args, rerere.v);
if (run_command(&rerere_cmd))
die(FAILED_RUN, rerere.v[0]);
report_garbage = report_pack_garbage;
reprepare_packed_git(the_repository);
if (pack_garbage.nr > 0) {
close_object_store(the_repository->objects);
clean_pack_garbage();
}
if (the_repository->settings.gc_write_commit_graph == 1)
write_commit_graph_reachable(the_repository->objects->odb,
!quiet && !daemonized ? COMMIT_GRAPH_WRITE_PROGRESS : 0,
NULL);
if (opts.auto_flag && too_many_loose_objects(&cfg))
warning(_("There are too many unreachable loose objects; "
"run 'git prune' to remove them."));
if (!daemonized) {
char *path = repo_git_path(the_repository, "gc.log");
unlink(path);
free(path);
}
out:
gc_config_release(&cfg);
return 0;
}
static const char *const builtin_maintenance_run_usage[] = {
N_("git maintenance run [--auto] [--[no-]quiet] [--task=<task>] [--schedule]"),
NULL
};
static int maintenance_opt_schedule(const struct option *opt, const char *arg,
int unset)
{
enum schedule_priority *priority = opt->value;
if (unset)
die(_("--no-schedule is not allowed"));
*priority = parse_schedule(arg);
if (!*priority)
die(_("unrecognized --schedule argument '%s'"), arg);
return 0;
}
/* Remember to update object flag allocation in object.h */
#define SEEN (1u<<0)
struct cg_auto_data {
int num_not_in_graph;
int limit;
};
static int dfs_on_ref(const char *refname UNUSED,
const char *referent UNUSED,
const struct object_id *oid,
int flags UNUSED,
void *cb_data)
{
struct cg_auto_data *data = (struct cg_auto_data *)cb_data;
int result = 0;
struct object_id peeled;
struct commit_list *stack = NULL;
struct commit *commit;
if (!peel_iterated_oid(the_repository, oid, &peeled))
oid = &peeled;
if (oid_object_info(the_repository, oid, NULL) != OBJ_COMMIT)
return 0;
commit = lookup_commit(the_repository, oid);
if (!commit)
return 0;
if (repo_parse_commit(the_repository, commit) ||
commit_graph_position(commit) != COMMIT_NOT_FROM_GRAPH)
return 0;
data->num_not_in_graph++;
if (data->num_not_in_graph >= data->limit)
return 1;
commit_list_append(commit, &stack);
while (!result && stack) {
struct commit_list *parent;
commit = pop_commit(&stack);
for (parent = commit->parents; parent; parent = parent->next) {
if (repo_parse_commit(the_repository, parent->item) ||
commit_graph_position(parent->item) != COMMIT_NOT_FROM_GRAPH ||
parent->item->object.flags & SEEN)
continue;
parent->item->object.flags |= SEEN;
data->num_not_in_graph++;
if (data->num_not_in_graph >= data->limit) {
result = 1;
break;
}
commit_list_append(parent->item, &stack);
}
}
free_commit_list(stack);
return result;
}
static int should_write_commit_graph(struct gc_config *cfg UNUSED)
{