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

#include "builtin.h"
#include "config.h"
#include "gettext.h"
#include "revision.h"
#include "reachable.h"
#include "worktree.h"
#include "reflog.h"
#include "parse-options.h"

#define BUILTIN_REFLOG_SHOW_USAGE \
	N_("git reflog [show] [<log-options>] [<ref>]")

#define BUILTIN_REFLOG_EXPIRE_USAGE \
	N_("git reflog expire [--expire=<time>] [--expire-unreachable=<time>]\n" \
	   "                  [--rewrite] [--updateref] [--stale-fix]\n" \
	   "                  [--dry-run | -n] [--verbose] [--all [--single-worktree] | <refs>...]")

#define BUILTIN_REFLOG_DELETE_USAGE \
	N_("git reflog delete [--rewrite] [--updateref]\n" \
	   "                  [--dry-run | -n] [--verbose] <ref>@{<specifier>}...")

#define BUILTIN_REFLOG_EXISTS_USAGE \
	N_("git reflog exists <ref>")

static const char *const reflog_show_usage[] = {
	BUILTIN_REFLOG_SHOW_USAGE,
	NULL,
};

static const char *const reflog_expire_usage[] = {
	BUILTIN_REFLOG_EXPIRE_USAGE,
	NULL
};

static const char *const reflog_delete_usage[] = {
	BUILTIN_REFLOG_DELETE_USAGE,
	NULL
};

static const char *const reflog_exists_usage[] = {
	BUILTIN_REFLOG_EXISTS_USAGE,
	NULL,
};

static const char *const reflog_usage[] = {
	BUILTIN_REFLOG_SHOW_USAGE,
	BUILTIN_REFLOG_EXPIRE_USAGE,
	BUILTIN_REFLOG_DELETE_USAGE,
	BUILTIN_REFLOG_EXISTS_USAGE,
	NULL
};

static timestamp_t default_reflog_expire;
static timestamp_t default_reflog_expire_unreachable;

struct worktree_reflogs {
	struct worktree *worktree;
	struct string_list reflogs;
};

static int collect_reflog(const char *ref, const struct object_id *oid UNUSED,
			  int flags UNUSED, void *cb_data)
{
	struct worktree_reflogs *cb = cb_data;
	struct worktree *worktree = cb->worktree;
	struct strbuf newref = STRBUF_INIT;

	/*
	 * Avoid collecting the same shared ref multiple times because
	 * they are available via all worktrees.
	 */
	if (!worktree->is_current &&
	    parse_worktree_ref(ref, NULL, NULL, NULL) == REF_WORKTREE_SHARED)
		return 0;

	strbuf_worktree_ref(worktree, &newref, ref);
	string_list_append_nodup(&cb->reflogs, strbuf_detach(&newref, NULL));

	return 0;
}

static struct reflog_expire_cfg {
	struct reflog_expire_cfg *next;
	timestamp_t expire_total;
	timestamp_t expire_unreachable;
	char pattern[FLEX_ARRAY];
} *reflog_expire_cfg, **reflog_expire_cfg_tail;

static struct reflog_expire_cfg *find_cfg_ent(const char *pattern, size_t len)
{
	struct reflog_expire_cfg *ent;

	if (!reflog_expire_cfg_tail)
		reflog_expire_cfg_tail = &reflog_expire_cfg;

	for (ent = reflog_expire_cfg; ent; ent = ent->next)
		if (!strncmp(ent->pattern, pattern, len) &&
		    ent->pattern[len] == '\0')
			return ent;

	FLEX_ALLOC_MEM(ent, pattern, pattern, len);
	*reflog_expire_cfg_tail = ent;
	reflog_expire_cfg_tail = &(ent->next);
	return ent;
}

/* expiry timer slot */
#define EXPIRE_TOTAL   01
#define EXPIRE_UNREACH 02

static int reflog_expire_config(const char *var, const char *value, void *cb)
{
	const char *pattern, *key;
	size_t pattern_len;
	timestamp_t expire;
	int slot;
	struct reflog_expire_cfg *ent;

	if (parse_config_key(var, "gc", &pattern, &pattern_len, &key) < 0)
		return git_default_config(var, value, cb);

	if (!strcmp(key, "reflogexpire")) {
		slot = EXPIRE_TOTAL;
		if (git_config_expiry_date(&expire, var, value))
			return -1;
	} else if (!strcmp(key, "reflogexpireunreachable")) {
		slot = EXPIRE_UNREACH;
		if (git_config_expiry_date(&expire, var, value))
			return -1;
	} else
		return git_default_config(var, value, cb);

	if (!pattern) {
		switch (slot) {
		case EXPIRE_TOTAL:
			default_reflog_expire = expire;
			break;
		case EXPIRE_UNREACH:
			default_reflog_expire_unreachable = expire;
			break;
		}
		return 0;
	}

	ent = find_cfg_ent(pattern, pattern_len);
	if (!ent)
		return -1;
	switch (slot) {
	case EXPIRE_TOTAL:
		ent->expire_total = expire;
		break;
	case EXPIRE_UNREACH:
		ent->expire_unreachable = expire;
		break;
	}
	return 0;
}

static void set_reflog_expiry_param(struct cmd_reflog_expire_cb *cb, const char *ref)
{
	struct reflog_expire_cfg *ent;

	if (cb->explicit_expiry == (EXPIRE_TOTAL|EXPIRE_UNREACH))
		return; /* both given explicitly -- nothing to tweak */

	for (ent = reflog_expire_cfg; ent; ent = ent->next) {
		if (!wildmatch(ent->pattern, ref, 0)) {
			if (!(cb->explicit_expiry & EXPIRE_TOTAL))
				cb->expire_total = ent->expire_total;
			if (!(cb->explicit_expiry & EXPIRE_UNREACH))
				cb->expire_unreachable = ent->expire_unreachable;
			return;
		}
	}

	/*
	 * If unconfigured, make stash never expire
	 */
	if (!strcmp(ref, "refs/stash")) {
		if (!(cb->explicit_expiry & EXPIRE_TOTAL))
			cb->expire_total = 0;
		if (!(cb->explicit_expiry & EXPIRE_UNREACH))
			cb->expire_unreachable = 0;
		return;
	}

	/* Nothing matched -- use the default value */
	if (!(cb->explicit_expiry & EXPIRE_TOTAL))
		cb->expire_total = default_reflog_expire;
	if (!(cb->explicit_expiry & EXPIRE_UNREACH))
		cb->expire_unreachable = default_reflog_expire_unreachable;
}

static int expire_unreachable_callback(const struct option *opt,
				 const char *arg,
				 int unset)
{
	struct cmd_reflog_expire_cb *cmd = opt->value;

	BUG_ON_OPT_NEG(unset);

	if (parse_expiry_date(arg, &cmd->expire_unreachable))
		die(_("invalid timestamp '%s' given to '--%s'"),
		    arg, opt->long_name);

	cmd->explicit_expiry |= EXPIRE_UNREACH;
	return 0;
}

static int expire_total_callback(const struct option *opt,
				 const char *arg,
				 int unset)
{
	struct cmd_reflog_expire_cb *cmd = opt->value;

	BUG_ON_OPT_NEG(unset);

	if (parse_expiry_date(arg, &cmd->expire_total))
		die(_("invalid timestamp '%s' given to '--%s'"),
		    arg, opt->long_name);

	cmd->explicit_expiry |= EXPIRE_TOTAL;
	return 0;
}

static int cmd_reflog_show(int argc, const char **argv, const char *prefix)
{
	struct option options[] = {
		OPT_END()
	};

	parse_options(argc, argv, prefix, options, reflog_show_usage,
		      PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0 |
		      PARSE_OPT_KEEP_UNKNOWN_OPT);

	return cmd_log_reflog(argc, argv, prefix);
}

static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
{
	struct cmd_reflog_expire_cb cmd = { 0 };
	timestamp_t now = time(NULL);
	int i, status, do_all, all_worktrees = 1;
	unsigned int flags = 0;
	int verbose = 0;
	reflog_expiry_should_prune_fn *should_prune_fn = should_expire_reflog_ent;
	const struct option options[] = {
		OPT_BIT(0, "dry-run", &flags, N_("do not actually prune any entries"),
			EXPIRE_REFLOGS_DRY_RUN),
		OPT_BIT(0, "rewrite", &flags,
			N_("rewrite the old SHA1 with the new SHA1 of the entry that now precedes it"),
			EXPIRE_REFLOGS_REWRITE),
		OPT_BIT(0, "updateref", &flags,
			N_("update the reference to the value of the top reflog entry"),
			EXPIRE_REFLOGS_UPDATE_REF),
		OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen")),
		OPT_CALLBACK_F(0, "expire", &cmd, N_("timestamp"),
			       N_("prune entries older than the specified time"),
			       PARSE_OPT_NONEG,
			       expire_total_callback),
		OPT_CALLBACK_F(0, "expire-unreachable", &cmd, N_("timestamp"),
			       N_("prune entries older than <time> that are not reachable from the current tip of the branch"),
			       PARSE_OPT_NONEG,
			       expire_unreachable_callback),
		OPT_BOOL(0, "stale-fix", &cmd.stalefix,
			 N_("prune any reflog entries that point to broken commits")),
		OPT_BOOL(0, "all", &do_all, N_("process the reflogs of all references")),
		OPT_BOOL(1, "single-worktree", &all_worktrees,
			 N_("limits processing to reflogs from the current worktree only")),
		OPT_END()
	};

	default_reflog_expire_unreachable = now - 30 * 24 * 3600;
	default_reflog_expire = now - 90 * 24 * 3600;
	git_config(reflog_expire_config, NULL);

	save_commit_buffer = 0;
	do_all = status = 0;

	cmd.explicit_expiry = 0;
	cmd.expire_total = default_reflog_expire;
	cmd.expire_unreachable = default_reflog_expire_unreachable;

	argc = parse_options(argc, argv, prefix, options, reflog_expire_usage, 0);

	if (verbose)
		should_prune_fn = should_expire_reflog_ent_verbose;

	/*
	 * We can trust the commits and objects reachable from refs
	 * even in older repository.  We cannot trust what's reachable
	 * from reflog if the repository was pruned with older git.
	 */
	if (cmd.stalefix) {
		struct rev_info revs;

		repo_init_revisions(the_repository, &revs, prefix);
		revs.do_not_die_on_missing_tree = 1;
		revs.ignore_missing = 1;
		revs.ignore_missing_links = 1;
		if (verbose)
			printf(_("Marking reachable objects..."));
		mark_reachable_objects(&revs, 0, 0, NULL);
		release_revisions(&revs);
		if (verbose)
			putchar('\n');
	}

	if (do_all) {
		struct worktree_reflogs collected = {
			.reflogs = STRING_LIST_INIT_DUP,
		};
		struct string_list_item *item;
		struct worktree **worktrees, **p;

		worktrees = get_worktrees();
		for (p = worktrees; *p; p++) {
			if (!all_worktrees && !(*p)->is_current)
				continue;
			collected.worktree = *p;
			refs_for_each_reflog(get_worktree_ref_store(*p),
					     collect_reflog, &collected);
		}
		free_worktrees(worktrees);

		for_each_string_list_item(item, &collected.reflogs) {
			struct expire_reflog_policy_cb cb = {
				.cmd = cmd,
				.dry_run = !!(flags & EXPIRE_REFLOGS_DRY_RUN),
			};

			set_reflog_expiry_param(&cb.cmd,  item->string);
			status |= reflog_expire(item->string, flags,
						reflog_expiry_prepare,
						should_prune_fn,
						reflog_expiry_cleanup,
						&cb);
		}
		string_list_clear(&collected.reflogs, 0);
	}

	for (i = 0; i < argc; i++) {
		char *ref;
		struct expire_reflog_policy_cb cb = { .cmd = cmd };

		if (!dwim_log(argv[i], strlen(argv[i]), NULL, &ref)) {
			status |= error(_("%s points nowhere!"), argv[i]);
			continue;
		}
		set_reflog_expiry_param(&cb.cmd, ref);
		status |= reflog_expire(ref, flags,
					reflog_expiry_prepare,
					should_prune_fn,
					reflog_expiry_cleanup,
					&cb);
		free(ref);
	}
	return status;
}

static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
{
	int i, status = 0;
	unsigned int flags = 0;
	int verbose = 0;

	const struct option options[] = {
		OPT_BIT(0, "dry-run", &flags, N_("do not actually prune any entries"),
			EXPIRE_REFLOGS_DRY_RUN),
		OPT_BIT(0, "rewrite", &flags,
			N_("rewrite the old SHA1 with the new SHA1 of the entry that now precedes it"),
			EXPIRE_REFLOGS_REWRITE),
		OPT_BIT(0, "updateref", &flags,
			N_("update the reference to the value of the top reflog entry"),
			EXPIRE_REFLOGS_UPDATE_REF),
		OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen")),
		OPT_END()
	};

	argc = parse_options(argc, argv, prefix, options, reflog_delete_usage, 0);

	if (argc < 1)
		return error(_("no reflog specified to delete"));

	for (i = 0; i < argc; i++)
		status |= reflog_delete(argv[i], flags, verbose);

	return status;
}

static int cmd_reflog_exists(int argc, const char **argv, const char *prefix)
{
	struct option options[] = {
		OPT_END()
	};
	const char *refname;

	argc = parse_options(argc, argv, prefix, options, reflog_exists_usage,
			     0);
	if (!argc)
		usage_with_options(reflog_exists_usage, options);

	refname = argv[0];
	if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
		die(_("invalid ref format: %s"), refname);
	return !reflog_exists(refname);
}

/*
 * main "reflog"
 */

int cmd_reflog(int argc, const char **argv, const char *prefix)
{
	parse_opt_subcommand_fn *fn = NULL;
	struct option options[] = {
		OPT_SUBCOMMAND("show", &fn, cmd_reflog_show),
		OPT_SUBCOMMAND("expire", &fn, cmd_reflog_expire),
		OPT_SUBCOMMAND("delete", &fn, cmd_reflog_delete),
		OPT_SUBCOMMAND("exists", &fn, cmd_reflog_exists),
		OPT_END()
	};

	argc = parse_options(argc, argv, prefix, options, reflog_usage,
			     PARSE_OPT_SUBCOMMAND_OPTIONAL |
			     PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0 |
			     PARSE_OPT_KEEP_UNKNOWN_OPT);
	if (fn)
		return fn(argc - 1, argv + 1, prefix);
	else
		return cmd_log_reflog(argc, argv, prefix);
}
Commit	Line	Data
4264dc15	1	#include "builtin.h"
b2141fc1	2	#include "config.h"
f394e093	3	#include "gettext.h"
1389d9dd JH	4	#include "revision.h"
1389d9dd JH	5	#include "reachable.h"
c9ef0d95	6	#include "worktree.h"
7d3d226e	7	#include "reflog.h"
49fd5511	8	#include "parse-options.h"
1389d9dd	9
fbc15b13 ÆAB	10	#define BUILTIN_REFLOG_SHOW_USAGE \
	11	N_("git reflog [show] [<log-options>] [<ref>]")
	12
1e91d3fa	13	#define BUILTIN_REFLOG_EXPIRE_USAGE \
cbe48529 ÆAB	14	N_("git reflog expire [--expire=<time>] [--expire-unreachable=<time>]\n" \
	15	" [--rewrite] [--updateref] [--stale-fix]\n" \
	16	" [--dry-run \| -n] [--verbose] [--all [--single-worktree] \| <refs>...]")
1e91d3fa ÆAB	17
1e91d3fa ÆAB	18	#define BUILTIN_REFLOG_DELETE_USAGE \
cbe48529 ÆAB	19	N_("git reflog delete [--rewrite] [--updateref]\n" \
cbe48529 ÆAB	20	" [--dry-run \| -n] [--verbose] <ref>@{<specifier>}...")
1e91d3fa ÆAB	21
	22	#define BUILTIN_REFLOG_EXISTS_USAGE \
	23	N_("git reflog exists <ref>")
	24
fbc15b13 ÆAB	25	static const char *const reflog_show_usage[] = {
	26	BUILTIN_REFLOG_SHOW_USAGE,
	27	NULL,
	28	};
	29
1e91d3fa ÆAB	30	static const char *const reflog_expire_usage[] = {
	31	BUILTIN_REFLOG_EXPIRE_USAGE,
	32	NULL
	33	};
	34
	35	static const char *const reflog_delete_usage[] = {
	36	BUILTIN_REFLOG_DELETE_USAGE,
	37	NULL
	38	};
	39
a34393f5 ÆAB	40	static const char *const reflog_exists_usage[] = {
	41	BUILTIN_REFLOG_EXISTS_USAGE,
	42	NULL,
	43	};
4264dc15	44
e3c36758	45	static const char *const reflog_usage[] = {
fbc15b13	46	BUILTIN_REFLOG_SHOW_USAGE,
e3c36758 ÆAB	47	BUILTIN_REFLOG_EXPIRE_USAGE,
	48	BUILTIN_REFLOG_DELETE_USAGE,
	49	BUILTIN_REFLOG_EXISTS_USAGE,
	50	NULL
	51	};
	52
dddbad72 JS	53	static timestamp_t default_reflog_expire;
dddbad72 JS	54	static timestamp_t default_reflog_expire_unreachable;
4aec56d1	55
f2919bae ÆAB	56	struct worktree_reflogs {
	57	struct worktree *worktree;
	58	struct string_list reflogs;
bda3a31c JH	59	};
bda3a31c JH	60
5cf88fd8 ÆAB	61	static int collect_reflog(const char ref, const struct object_id oid UNUSED,
5cf88fd8 ÆAB	62	int flags UNUSED, void *cb_data)
bda3a31c	63	{
f2919bae ÆAB	64	struct worktree_reflogs *cb = cb_data;
f2919bae ÆAB	65	struct worktree *worktree = cb->worktree;
c9ef0d95 NTND	66	struct strbuf newref = STRBUF_INIT;
	67
	68	/*
	69	* Avoid collecting the same shared ref multiple times because
	70	* they are available via all worktrees.
	71	*/
71e54734 HWN	72	if (!worktree->is_current &&
71e54734 HWN	73	parse_worktree_ref(ref, NULL, NULL, NULL) == REF_WORKTREE_SHARED)
c9ef0d95 NTND	74	return 0;
c9ef0d95 NTND	75
f2919bae ÆAB	76	strbuf_worktree_ref(worktree, &newref, ref);
f2919bae ÆAB	77	string_list_append_nodup(&cb->reflogs, strbuf_detach(&newref, NULL));
bda3a31c	78
bda3a31c JH	79	return 0;
	80	}
	81
3cb22b8e JH	82	static struct reflog_expire_cfg {
3cb22b8e JH	83	struct reflog_expire_cfg *next;
dddbad72 JS	84	timestamp_t expire_total;
dddbad72 JS	85	timestamp_t expire_unreachable;
3cb22b8e JH	86	char pattern[FLEX_ARRAY];
	87	} reflog_expire_cfg, *reflog_expire_cfg_tail;
	88
	89	static struct reflog_expire_cfg find_cfg_ent(const char pattern, size_t len)
4aec56d1	90	{
3cb22b8e JH	91	struct reflog_expire_cfg *ent;
	92
	93	if (!reflog_expire_cfg_tail)
	94	reflog_expire_cfg_tail = &reflog_expire_cfg;
	95
	96	for (ent = reflog_expire_cfg; ent; ent = ent->next)
c3a700fb JK	97	if (!strncmp(ent->pattern, pattern, len) &&
c3a700fb JK	98	ent->pattern[len] == '\0')
3cb22b8e JH	99	return ent;
3cb22b8e JH	100
96ffc06f	101	FLEX_ALLOC_MEM(ent, pattern, pattern, len);
3cb22b8e JH	102	*reflog_expire_cfg_tail = ent;
	103	reflog_expire_cfg_tail = &(ent->next);
	104	return ent;
	105	}
	106
3cb22b8e JH	107	/* expiry timer slot */
	108	#define EXPIRE_TOTAL 01
	109	#define EXPIRE_UNREACH 02
	110
	111	static int reflog_expire_config(const char var, const char value, void *cb)
	112	{
b3873c33	113	const char pattern, key;
f5914f4b	114	size_t pattern_len;
dddbad72	115	timestamp_t expire;
3cb22b8e JH	116	int slot;
	117	struct reflog_expire_cfg *ent;
	118
b3873c33	119	if (parse_config_key(var, "gc", &pattern, &pattern_len, &key) < 0)
3cb22b8e JH	120	return git_default_config(var, value, cb);
3cb22b8e JH	121
b3873c33	122	if (!strcmp(key, "reflogexpire")) {
3cb22b8e	123	slot = EXPIRE_TOTAL;
5f967424	124	if (git_config_expiry_date(&expire, var, value))
3cb22b8e	125	return -1;
b3873c33	126	} else if (!strcmp(key, "reflogexpireunreachable")) {
3cb22b8e	127	slot = EXPIRE_UNREACH;
5f967424	128	if (git_config_expiry_date(&expire, var, value))
3cb22b8e JH	129	return -1;
	130	} else
	131	return git_default_config(var, value, cb);
	132
b3873c33	133	if (!pattern) {
3cb22b8e JH	134	switch (slot) {
	135	case EXPIRE_TOTAL:
	136	default_reflog_expire = expire;
	137	break;
	138	case EXPIRE_UNREACH:
	139	default_reflog_expire_unreachable = expire;
	140	break;
	141	}
4f342b96 JH	142	return 0;
4f342b96 JH	143	}
3cb22b8e	144
b3873c33	145	ent = find_cfg_ent(pattern, pattern_len);
3cb22b8e JH	146	if (!ent)
	147	return -1;
	148	switch (slot) {
	149	case EXPIRE_TOTAL:
	150	ent->expire_total = expire;
	151	break;
	152	case EXPIRE_UNREACH:
	153	ent->expire_unreachable = expire;
	154	break;
	155	}
	156	return 0;
	157	}
	158
33d7bdd6	159	static void set_reflog_expiry_param(struct cmd_reflog_expire_cb cb, const char ref)
3cb22b8e JH	160	{
	161	struct reflog_expire_cfg *ent;
	162
33d7bdd6	163	if (cb->explicit_expiry == (EXPIRE_TOTAL\|EXPIRE_UNREACH))
3cb22b8e JH	164	return; /* both given explicitly -- nothing to tweak */
	165
	166	for (ent = reflog_expire_cfg; ent; ent = ent->next) {
55d34269	167	if (!wildmatch(ent->pattern, ref, 0)) {
33d7bdd6	168	if (!(cb->explicit_expiry & EXPIRE_TOTAL))
3cb22b8e	169	cb->expire_total = ent->expire_total;
33d7bdd6	170	if (!(cb->explicit_expiry & EXPIRE_UNREACH))
3cb22b8e JH	171	cb->expire_unreachable = ent->expire_unreachable;
	172	return;
	173	}
	174	}
	175
60bce2bb JH	176	/*
	177	* If unconfigured, make stash never expire
	178	*/
	179	if (!strcmp(ref, "refs/stash")) {
33d7bdd6	180	if (!(cb->explicit_expiry & EXPIRE_TOTAL))
60bce2bb	181	cb->expire_total = 0;
33d7bdd6	182	if (!(cb->explicit_expiry & EXPIRE_UNREACH))
60bce2bb JH	183	cb->expire_unreachable = 0;
	184	return;
	185	}
	186
3cb22b8e	187	/* Nothing matched -- use the default value */
33d7bdd6	188	if (!(cb->explicit_expiry & EXPIRE_TOTAL))
3cb22b8e	189	cb->expire_total = default_reflog_expire;
33d7bdd6	190	if (!(cb->explicit_expiry & EXPIRE_UNREACH))
3cb22b8e	191	cb->expire_unreachable = default_reflog_expire_unreachable;
4aec56d1 JH	192	}
4aec56d1 JH	193
33d7bdd6 JC	194	static int expire_unreachable_callback(const struct option *opt,
	195	const char *arg,
	196	int unset)
	197	{
	198	struct cmd_reflog_expire_cb *cmd = opt->value;
	199
ee610f00 JK	200	BUG_ON_OPT_NEG(unset);
ee610f00 JK	201
33d7bdd6 JC	202	if (parse_expiry_date(arg, &cmd->expire_unreachable))
	203	die(_("invalid timestamp '%s' given to '--%s'"),
	204	arg, opt->long_name);
	205
	206	cmd->explicit_expiry \|= EXPIRE_UNREACH;
	207	return 0;
	208	}
	209
	210	static int expire_total_callback(const struct option *opt,
	211	const char *arg,
	212	int unset)
	213	{
	214	struct cmd_reflog_expire_cb *cmd = opt->value;
	215
ee610f00 JK	216	BUG_ON_OPT_NEG(unset);
ee610f00 JK	217
33d7bdd6 JC	218	if (parse_expiry_date(arg, &cmd->expire_total))
	219	die(_("invalid timestamp '%s' given to '--%s'"),
	220	arg, opt->long_name);
	221
	222	cmd->explicit_expiry \|= EXPIRE_TOTAL;
	223	return 0;
	224	}
	225
fbc15b13 ÆAB	226	static int cmd_reflog_show(int argc, const char *argv, const char prefix)
	227	{
	228	struct option options[] = {
	229	OPT_END()
	230	};
	231
	232	parse_options(argc, argv, prefix, options, reflog_show_usage,
	233	PARSE_OPT_KEEP_DASHDASH \| PARSE_OPT_KEEP_ARGV0 \|
99d86d60	234	PARSE_OPT_KEEP_UNKNOWN_OPT);
fbc15b13	235
840344db	236	return cmd_log_reflog(argc, argv, prefix);
fbc15b13 ÆAB	237	}
fbc15b13 ÆAB	238
4264dc15 JH	239	static int cmd_reflog_expire(int argc, const char *argv, const char prefix)
4264dc15 JH	240	{
46fbe418	241	struct cmd_reflog_expire_cb cmd = { 0 };
dddbad72	242	timestamp_t now = time(NULL);
c9ef0d95	243	int i, status, do_all, all_worktrees = 1;
aba56c89	244	unsigned int flags = 0;
fcd2c3d9 ÆAB	245	int verbose = 0;
fcd2c3d9 ÆAB	246	reflog_expiry_should_prune_fn *should_prune_fn = should_expire_reflog_ent;
33d7bdd6 JC	247	const struct option options[] = {
	248	OPT_BIT(0, "dry-run", &flags, N_("do not actually prune any entries"),
	249	EXPIRE_REFLOGS_DRY_RUN),
	250	OPT_BIT(0, "rewrite", &flags,
	251	N_("rewrite the old SHA1 with the new SHA1 of the entry that now precedes it"),
	252	EXPIRE_REFLOGS_REWRITE),
	253	OPT_BIT(0, "updateref", &flags,
	254	N_("update the reference to the value of the top reflog entry"),
	255	EXPIRE_REFLOGS_UPDATE_REF),
9e1f22c8	256	OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen")),
33d7bdd6 JC	257	OPT_CALLBACK_F(0, "expire", &cmd, N_("timestamp"),
	258	N_("prune entries older than the specified time"),
	259	PARSE_OPT_NONEG,
	260	expire_total_callback),
	261	OPT_CALLBACK_F(0, "expire-unreachable", &cmd, N_("timestamp"),
	262	N_("prune entries older than <time> that are not reachable from the current tip of the branch"),
	263	PARSE_OPT_NONEG,
	264	expire_unreachable_callback),
	265	OPT_BOOL(0, "stale-fix", &cmd.stalefix,
	266	N_("prune any reflog entries that point to broken commits")),
	267	OPT_BOOL(0, "all", &do_all, N_("process the reflogs of all references")),
	268	OPT_BOOL(1, "single-worktree", &all_worktrees,
9e1f22c8	269	N_("limits processing to reflogs from the current worktree only")),
33d7bdd6 JC	270	OPT_END()
33d7bdd6 JC	271	};
4264dc15	272
4a9f4394 AS	273	default_reflog_expire_unreachable = now - 30 * 24 * 3600;
4a9f4394 AS	274	default_reflog_expire = now - 90 * 24 * 3600;
ef90d6d4	275	git_config(reflog_expire_config, NULL);
4aec56d1	276
4264dc15 JH	277	save_commit_buffer = 0;
4264dc15 JH	278	do_all = status = 0;
4aec56d1	279
33d7bdd6	280	cmd.explicit_expiry = 0;
46fbe418 ÆAB	281	cmd.expire_total = default_reflog_expire;
46fbe418 ÆAB	282	cmd.expire_unreachable = default_reflog_expire_unreachable;
4264dc15	283
33d7bdd6	284	argc = parse_options(argc, argv, prefix, options, reflog_expire_usage, 0);
3cb22b8e	285
fcd2c3d9 ÆAB	286	if (verbose)
	287	should_prune_fn = should_expire_reflog_ent_verbose;
	288
3cb22b8e JH	289	/*
	290	* We can trust the commits and objects reachable from refs
	291	* even in older repository. We cannot trust what's reachable
	292	* from reflog if the repository was pruned with older git.
	293	*/
46fbe418	294	if (cmd.stalefix) {
994b328f ÆAB	295	struct rev_info revs;
	296
	297	repo_init_revisions(the_repository, &revs, prefix);
	298	revs.do_not_die_on_missing_tree = 1;
	299	revs.ignore_missing = 1;
	300	revs.ignore_missing_links = 1;
fcd2c3d9	301	if (verbose)
dd509db3	302	printf(_("Marking reachable objects..."));
994b328f	303	mark_reachable_objects(&revs, 0, 0, NULL);
2108fe4a	304	release_revisions(&revs);
fcd2c3d9	305	if (verbose)
1389d9dd JH	306	putchar('\n');
	307	}
	308
bda3a31c	309	if (do_all) {
f2919bae ÆAB	310	struct worktree_reflogs collected = {
	311	.reflogs = STRING_LIST_INIT_DUP,
	312	};
	313	struct string_list_item *item;
c9ef0d95	314	struct worktree worktrees, p;
bda3a31c	315
03f2465b	316	worktrees = get_worktrees();
c9ef0d95 NTND	317	for (p = worktrees; *p; p++) {
	318	if (!all_worktrees && !(*p)->is_current)
	319	continue;
f2919bae	320	collected.worktree = *p;
c9ef0d95 NTND	321	refs_for_each_reflog(get_worktree_ref_store(*p),
	322	collect_reflog, &collected);
	323	}
	324	free_worktrees(worktrees);
f2919bae ÆAB	325
f2919bae ÆAB	326	for_each_string_list_item(item, &collected.reflogs) {
fcd2c3d9 ÆAB	327	struct expire_reflog_policy_cb cb = {
	328	.cmd = cmd,
	329	.dry_run = !!(flags & EXPIRE_REFLOGS_DRY_RUN),
	330	};
ae35e16c	331
33d7bdd6	332	set_reflog_expiry_param(&cb.cmd, item->string);
f2919bae	333	status \|= reflog_expire(item->string, flags,
fa5b1830	334	reflog_expiry_prepare,
fcd2c3d9	335	should_prune_fn,
fa5b1830 MH	336	reflog_expiry_cleanup,
fa5b1830 MH	337	&cb);
bda3a31c	338	}
f2919bae	339	string_list_clear(&collected.reflogs, 0);
bda3a31c JH	340	}
bda3a31c JH	341
33d7bdd6	342	for (i = 0; i < argc; i++) {
90fb46ec	343	char *ref;
46fbe418 ÆAB	344	struct expire_reflog_policy_cb cb = { .cmd = cmd };
46fbe418 ÆAB	345
ae35e16c	346	if (!dwim_log(argv[i], strlen(argv[i]), NULL, &ref)) {
dd509db3	347	status \|= error(_("%s points nowhere!"), argv[i]);
4264dc15 JH	348	continue;
4264dc15 JH	349	}
33d7bdd6	350	set_reflog_expiry_param(&cb.cmd, ref);
cc40b5ce	351	status \|= reflog_expire(ref, flags,
fa5b1830	352	reflog_expiry_prepare,
fcd2c3d9	353	should_prune_fn,
fa5b1830 MH	354	reflog_expiry_cleanup,
fa5b1830 MH	355	&cb);
3c815049	356	free(ref);
4264dc15 JH	357	}
	358	return status;
	359	}
	360
552cecc2 JS	361	static int cmd_reflog_delete(int argc, const char *argv, const char prefix)
552cecc2 JS	362	{
552cecc2	363	int i, status = 0;
aba56c89	364	unsigned int flags = 0;
fcd2c3d9	365	int verbose = 0;
7d3d226e	366
33d7bdd6 JC	367	const struct option options[] = {
	368	OPT_BIT(0, "dry-run", &flags, N_("do not actually prune any entries"),
	369	EXPIRE_REFLOGS_DRY_RUN),
	370	OPT_BIT(0, "rewrite", &flags,
	371	N_("rewrite the old SHA1 with the new SHA1 of the entry that now precedes it"),
	372	EXPIRE_REFLOGS_REWRITE),
	373	OPT_BIT(0, "updateref", &flags,
	374	N_("update the reference to the value of the top reflog entry"),
	375	EXPIRE_REFLOGS_UPDATE_REF),
9e1f22c8	376	OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen")),
33d7bdd6 JC	377	OPT_END()
	378	};
	379
	380	argc = parse_options(argc, argv, prefix, options, reflog_delete_usage, 0);
3c386aa3	381
33d7bdd6	382	if (argc < 1)
dd509db3	383	return error(_("no reflog specified to delete"));
3c386aa3	384
7d3d226e JC	385	for (i = 0; i < argc; i++)
7d3d226e JC	386	status \|= reflog_delete(argv[i], flags, verbose);
552cecc2	387
552cecc2 JS	388	return status;
	389	}
	390
afcb2e7a DT	391	static int cmd_reflog_exists(int argc, const char *argv, const char prefix)
afcb2e7a DT	392	{
a34393f5 ÆAB	393	struct option options[] = {
	394	OPT_END()
	395	};
	396	const char *refname;
afcb2e7a	397
a34393f5 ÆAB	398	argc = parse_options(argc, argv, prefix, options, reflog_exists_usage,
	399	0);
	400	if (!argc)
	401	usage_with_options(reflog_exists_usage, options);
afcb2e7a	402
a34393f5 ÆAB	403	refname = argv[0];
	404	if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
	405	die(_("invalid ref format: %s"), refname);
	406	return !reflog_exists(refname);
afcb2e7a DT	407	}
afcb2e7a DT	408
1389d9dd JH	409	/*
	410	* main "reflog"
	411	*/
	412
4264dc15 JH	413	int cmd_reflog(int argc, const char *argv, const char prefix)
4264dc15 JH	414	{
729b9733	415	parse_opt_subcommand_fn *fn = NULL;
e3c36758	416	struct option options[] = {
729b9733 SG	417	OPT_SUBCOMMAND("show", &fn, cmd_reflog_show),
	418	OPT_SUBCOMMAND("expire", &fn, cmd_reflog_expire),
	419	OPT_SUBCOMMAND("delete", &fn, cmd_reflog_delete),
	420	OPT_SUBCOMMAND("exists", &fn, cmd_reflog_exists),
e3c36758 ÆAB	421	OPT_END()
	422	};
	423
	424	argc = parse_options(argc, argv, prefix, options, reflog_usage,
729b9733	425	PARSE_OPT_SUBCOMMAND_OPTIONAL \|
e3c36758	426	PARSE_OPT_KEEP_DASHDASH \| PARSE_OPT_KEEP_ARGV0 \|
729b9733 SG	427	PARSE_OPT_KEEP_UNKNOWN_OPT);
	428	if (fn)
	429	return fn(argc - 1, argv + 1, prefix);
	430	else
	431	return cmd_log_reflog(argc, argv, prefix);
4264dc15	432	}