[thirdparty/git.git] / reflog-walk.c

#include "cache.h"
#include "commit.h"
#include "refs.h"
#include "diff.h"
#include "revision.h"
#include "string-list.h"
#include "reflog-walk.h"

struct complete_reflogs {
	char *ref;
	char *short_ref;
	struct reflog_info {
		struct object_id ooid, noid;
		char *email;
		timestamp_t timestamp;
		int tz;
		char *message;
	} *items;
	int nr, alloc;
};

static int read_one_reflog(struct object_id *ooid, struct object_id *noid,
		const char *email, timestamp_t timestamp, int tz,
		const char *message, void *cb_data)
{
	struct complete_reflogs *array = cb_data;
	struct reflog_info *item;

	ALLOC_GROW(array->items, array->nr + 1, array->alloc);
	item = array->items + array->nr;
	oidcpy(&item->ooid, ooid);
	oidcpy(&item->noid, noid);
	item->email = xstrdup(email);
	item->timestamp = timestamp;
	item->tz = tz;
	item->message = xstrdup(message);
	array->nr++;
	return 0;
}

static void free_complete_reflog(struct complete_reflogs *array)
{
	int i;

	if (!array)
		return;

	for (i = 0; i < array->nr; i++) {
		free(array->items[i].email);
		free(array->items[i].message);
	}
	free(array->items);
	free(array->ref);
	free(array->short_ref);
	free(array);
}

static void complete_reflogs_clear(void *util, const char *str)
{
	struct complete_reflogs *array = util;
	free_complete_reflog(array);
}

static struct complete_reflogs *read_complete_reflog(const char *ref)
{
	struct complete_reflogs *reflogs =
		xcalloc(1, sizeof(struct complete_reflogs));
	reflogs->ref = xstrdup(ref);
	for_each_reflog_ent(ref, read_one_reflog, reflogs);
	if (reflogs->nr == 0) {
		const char *name;
		void *name_to_free;
		name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
						     NULL, NULL);
		if (name) {
			for_each_reflog_ent(name, read_one_reflog, reflogs);
			free(name_to_free);
		}
	}
	if (reflogs->nr == 0) {
		char *refname = xstrfmt("refs/%s", ref);
		for_each_reflog_ent(refname, read_one_reflog, reflogs);
		if (reflogs->nr == 0) {
			free(refname);
			refname = xstrfmt("refs/heads/%s", ref);
			for_each_reflog_ent(refname, read_one_reflog, reflogs);
		}
		free(refname);
	}
	return reflogs;
}

static int get_reflog_recno_by_time(struct complete_reflogs *array,
	timestamp_t timestamp)
{
	int i;
	for (i = array->nr - 1; i >= 0; i--)
		if (timestamp >= array->items[i].timestamp)
			return i;
	return -1;
}

struct commit_reflog {
	int recno;
	enum selector_type {
		SELECTOR_NONE,
		SELECTOR_INDEX,
		SELECTOR_DATE
	} selector;
	struct complete_reflogs *reflogs;
};

struct reflog_walk_info {
	struct commit_reflog **logs;
	size_t nr, alloc;
	struct string_list complete_reflogs;
	struct commit_reflog *last_commit_reflog;
};

void init_reflog_walk(struct reflog_walk_info **info)
{
	CALLOC_ARRAY(*info, 1);
	(*info)->complete_reflogs.strdup_strings = 1;
}

void reflog_walk_info_release(struct reflog_walk_info *info)
{
	size_t i;

	if (!info)
		return;

	for (i = 0; i < info->nr; i++)
		free(info->logs[i]);
	string_list_clear_func(&info->complete_reflogs,
			       complete_reflogs_clear);
	free(info->logs);
	free(info);
}

int add_reflog_for_walk(struct reflog_walk_info *info,
		struct commit *commit, const char *name)
{
	timestamp_t timestamp = 0;
	int recno = -1;
	struct string_list_item *item;
	struct complete_reflogs *reflogs;
	char *branch, *at = strchr(name, '@');
	struct commit_reflog *commit_reflog;
	enum selector_type selector = SELECTOR_NONE;

	if (commit->object.flags & UNINTERESTING)
		die("cannot walk reflogs for %s", name);

	branch = xstrdup(name);
	if (at && at[1] == '{') {
		char *ep;
		branch[at - name] = '\0';
		recno = strtoul(at + 2, &ep, 10);
		if (*ep != '}') {
			recno = -1;
			timestamp = approxidate(at + 2);
			selector = SELECTOR_DATE;
		}
		else
			selector = SELECTOR_INDEX;
	} else
		recno = 0;

	item = string_list_lookup(&info->complete_reflogs, branch);
	if (item)
		reflogs = item->util;
	else {
		if (*branch == '\0') {
			free(branch);
			branch = resolve_refdup("HEAD", 0, NULL, NULL);
			if (!branch)
				die("no current branch");

		}
		reflogs = read_complete_reflog(branch);
		if (!reflogs || reflogs->nr == 0) {
			char *b;
			int ret = dwim_log(branch, strlen(branch),
					   NULL, &b);
			if (ret > 1)
				free(b);
			else if (ret == 1) {
				free_complete_reflog(reflogs);
				free(branch);
				branch = b;
				reflogs = read_complete_reflog(branch);
			}
		}
		if (!reflogs || reflogs->nr == 0) {
			free_complete_reflog(reflogs);
			free(branch);
			return -1;
		}
		string_list_insert(&info->complete_reflogs, branch)->util
			= reflogs;
	}
	free(branch);

	CALLOC_ARRAY(commit_reflog, 1);
	if (recno < 0) {
		commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
		if (commit_reflog->recno < 0) {
			free(commit_reflog);
			return -1;
		}
	} else
		commit_reflog->recno = reflogs->nr - recno - 1;
	commit_reflog->selector = selector;
	commit_reflog->reflogs = reflogs;

	ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
	info->logs[info->nr++] = commit_reflog;

	return 0;
}

void get_reflog_selector(struct strbuf *sb,
			 struct reflog_walk_info *reflog_info,
			 const struct date_mode *dmode, int force_date,
			 int shorten)
{
	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	struct reflog_info *info;
	const char *printed_ref;

	if (!commit_reflog)
		return;

	if (shorten) {
		if (!commit_reflog->reflogs->short_ref)
			commit_reflog->reflogs->short_ref
				= shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
		printed_ref = commit_reflog->reflogs->short_ref;
	} else {
		printed_ref = commit_reflog->reflogs->ref;
	}

	strbuf_addf(sb, "%s@{", printed_ref);
	if (commit_reflog->selector == SELECTOR_DATE ||
	    (commit_reflog->selector == SELECTOR_NONE && force_date)) {
		info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
		strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
	} else {
		strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
			    - 2 - commit_reflog->recno);
	}

	strbuf_addch(sb, '}');
}

void get_reflog_message(struct strbuf *sb,
			struct reflog_walk_info *reflog_info)
{
	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	struct reflog_info *info;
	size_t len;

	if (!commit_reflog)
		return;

	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	len = strlen(info->message);
	if (len > 0)
		len--; /* strip away trailing newline */
	strbuf_add(sb, info->message, len);
}

const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
{
	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	struct reflog_info *info;

	if (!commit_reflog)
		return NULL;

	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	return info->email;
}

timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
{
	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	struct reflog_info *info;

	if (!commit_reflog)
		return 0;

	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	return info->timestamp;
}

void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
			 const struct date_mode *dmode, int force_date)
{
	if (reflog_info && reflog_info->last_commit_reflog) {
		struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
		struct reflog_info *info;
		struct strbuf selector = STRBUF_INIT;

		info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
		get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
		if (oneline) {
			printf("%s: %s", selector.buf, info->message);
		}
		else {
			printf("Reflog: %s (%s)\nReflog message: %s",
			       selector.buf, info->email, info->message);
		}

		strbuf_release(&selector);
	}
}

int reflog_walk_empty(struct reflog_walk_info *info)
{
	return !info || !info->nr;
}

static struct commit *next_reflog_commit(struct commit_reflog *log)
{
	for (; log->recno >= 0; log->recno--) {
		struct reflog_info *entry = &log->reflogs->items[log->recno];
		struct object *obj = parse_object(the_repository,
						  &entry->noid);

		if (obj && obj->type == OBJ_COMMIT)
			return (struct commit *)obj;
	}
	return NULL;
}

static timestamp_t log_timestamp(struct commit_reflog *log)
{
	return log->reflogs->items[log->recno].timestamp;
}

struct commit *next_reflog_entry(struct reflog_walk_info *walk)
{
	struct commit_reflog *best = NULL;
	struct commit *best_commit = NULL;
	size_t i;

	for (i = 0; i < walk->nr; i++) {
		struct commit_reflog *log = walk->logs[i];
		struct commit *commit = next_reflog_commit(log);

		if (!commit)
			continue;

		if (!best || log_timestamp(log) > log_timestamp(best)) {
			best = log;
			best_commit = commit;
		}
	}

	if (best) {
		best->recno--;
		walk->last_commit_reflog = best;
		return best_commit;
	}

	return NULL;
}
Commit	Line	Data
8860fd42 JS	1	#include "cache.h"
	2	#include "commit.h"
	3	#include "refs.h"
	4	#include "diff.h"
	5	#include "revision.h"
c455c87c	6	#include "string-list.h"
53645a3a	7	#include "reflog-walk.h"
8860fd42 JS	8
	9	struct complete_reflogs {
	10	char *ref;
81ffbf83	11	char *short_ref;
8860fd42	12	struct reflog_info {
8ebc3fd0	13	struct object_id ooid, noid;
8860fd42	14	char *email;
dddbad72	15	timestamp_t timestamp;
8860fd42 JS	16	int tz;
	17	char *message;
	18	} *items;
	19	int nr, alloc;
	20	};
	21
9461d272	22	static int read_one_reflog(struct object_id ooid, struct object_id noid,
dddbad72	23	const char *email, timestamp_t timestamp, int tz,
8860fd42 JS	24	const char message, void cb_data)
	25	{
	26	struct complete_reflogs *array = cb_data;
	27	struct reflog_info *item;
	28
6647cc26	29	ALLOC_GROW(array->items, array->nr + 1, array->alloc);
8860fd42	30	item = array->items + array->nr;
9461d272	31	oidcpy(&item->ooid, ooid);
9461d272	32	oidcpy(&item->noid, noid);
8860fd42 JS	33	item->email = xstrdup(email);
	34	item->timestamp = timestamp;
	35	item->tz = tz;
	36	item->message = xstrdup(message);
	37	array->nr++;
	38	return 0;
	39	}
	40
e30d463d JK	41	static void free_complete_reflog(struct complete_reflogs *array)
	42	{
	43	int i;
	44
	45	if (!array)
	46	return;
	47
	48	for (i = 0; i < array->nr; i++) {
	49	free(array->items[i].email);
	50	free(array->items[i].message);
	51	}
	52	free(array->items);
	53	free(array->ref);
81ffbf83	54	free(array->short_ref);
e30d463d JK	55	free(array);
	56	}
	57
81ffbf83 ÆAB	58	static void complete_reflogs_clear(void util, const char str)
	59	{
	60	struct complete_reflogs *array = util;
	61	free_complete_reflog(array);
	62	}
	63
8860fd42 JS	64	static struct complete_reflogs read_complete_reflog(const char ref)
	65	{
	66	struct complete_reflogs *reflogs =
8e1aa2f7	67	xcalloc(1, sizeof(struct complete_reflogs));
8860fd42 JS	68	reflogs->ref = xstrdup(ref);
	69	for_each_reflog_ent(ref, read_one_reflog, reflogs);
	70	if (reflogs->nr == 0) {
96ec7b1e NTND	71	const char *name;
96ec7b1e NTND	72	void *name_to_free;
7695d118	73	name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
efbd4fdf	74	NULL, NULL);
d5a35c11	75	if (name) {
8860fd42	76	for_each_reflog_ent(name, read_one_reflog, reflogs);
96ec7b1e	77	free(name_to_free);
d5a35c11	78	}
8860fd42 JS	79	}
8860fd42 JS	80	if (reflogs->nr == 0) {
75faa45a	81	char *refname = xstrfmt("refs/%s", ref);
8860fd42 JS	82	for_each_reflog_ent(refname, read_one_reflog, reflogs);
8860fd42 JS	83	if (reflogs->nr == 0) {
75faa45a JK	84	free(refname);
75faa45a JK	85	refname = xstrfmt("refs/heads/%s", ref);
8860fd42 JS	86	for_each_reflog_ent(refname, read_one_reflog, reflogs);
	87	}
	88	free(refname);
	89	}
	90	return reflogs;
	91	}
	92
	93	static int get_reflog_recno_by_time(struct complete_reflogs *array,
dddbad72	94	timestamp_t timestamp)
8860fd42 JS	95	{
8860fd42 JS	96	int i;
40ab7c33	97	for (i = array->nr - 1; i >= 0; i--)
8860fd42 JS	98	if (timestamp >= array->items[i].timestamp)
	99	return i;
	100	return -1;
	101	}
	102
8860fd42	103	struct commit_reflog {
a763126b JK	104	int recno;
	105	enum selector_type {
	106	SELECTOR_NONE,
	107	SELECTOR_INDEX,
	108	SELECTOR_DATE
	109	} selector;
8860fd42 JS	110	struct complete_reflogs *reflogs;
	111	};
	112
	113	struct reflog_walk_info {
d08565bf JK	114	struct commit_reflog **logs;
d08565bf JK	115	size_t nr, alloc;
c455c87c	116	struct string_list complete_reflogs;
8860fd42 JS	117	struct commit_reflog *last_commit_reflog;
	118	};
	119
24d36f14	120	void init_reflog_walk(struct reflog_walk_info **info)
8860fd42	121	{
ca56dadb	122	CALLOC_ARRAY(*info, 1);
75afe7ac	123	(*info)->complete_reflogs.strdup_strings = 1;
8860fd42 JS	124	}
8860fd42 JS	125
81ffbf83 ÆAB	126	void reflog_walk_info_release(struct reflog_walk_info *info)
	127	{
	128	size_t i;
	129
	130	if (!info)
	131	return;
	132
	133	for (i = 0; i < info->nr; i++)
	134	free(info->logs[i]);
	135	string_list_clear_func(&info->complete_reflogs,
	136	complete_reflogs_clear);
	137	free(info->logs);
	138	free(info);
	139	}
	140
7b69b873	141	int add_reflog_for_walk(struct reflog_walk_info *info,
8860fd42 JS	142	struct commit commit, const char name)
8860fd42 JS	143	{
dddbad72	144	timestamp_t timestamp = 0;
8860fd42	145	int recno = -1;
c455c87c	146	struct string_list_item *item;
8860fd42 JS	147	struct complete_reflogs *reflogs;
	148	char branch, at = strchr(name, '@');
	149	struct commit_reflog *commit_reflog;
a763126b	150	enum selector_type selector = SELECTOR_NONE;
8860fd42	151
db055e65	152	if (commit->object.flags & UNINTERESTING)
1a07e59c	153	die("cannot walk reflogs for %s", name);
db055e65	154
8860fd42 JS	155	branch = xstrdup(name);
	156	if (at && at[1] == '{') {
	157	char *ep;
	158	branch[at - name] = '\0';
	159	recno = strtoul(at + 2, &ep, 10);
	160	if (*ep != '}') {
	161	recno = -1;
	162	timestamp = approxidate(at + 2);
a763126b	163	selector = SELECTOR_DATE;
8860fd42	164	}
a763126b JK	165	else
a763126b JK	166	selector = SELECTOR_INDEX;
8860fd42 JS	167	} else
	168	recno = 0;
	169
e8c8b713	170	item = string_list_lookup(&info->complete_reflogs, branch);
8860fd42 JS	171	if (item)
	172	reflogs = item->util;
	173	else {
d271fd53	174	if (*branch == '\0') {
d271fd53	175	free(branch);
efbd4fdf	176	branch = resolve_refdup("HEAD", 0, NULL, NULL);
96ec7b1e	177	if (!branch)
1a07e59c	178	die("no current branch");
96ec7b1e	179
d271fd53	180	}
8860fd42	181	reflogs = read_complete_reflog(branch);
eb3a4822	182	if (!reflogs \|\| reflogs->nr == 0) {
eb3a4822	183	char *b;
5026b471	184	int ret = dwim_log(branch, strlen(branch),
6f45ec88	185	NULL, &b);
5026b471 JS	186	if (ret > 1)
	187	free(b);
	188	else if (ret == 1) {
e30d463d	189	free_complete_reflog(reflogs);
eb3a4822 JS	190	free(branch);
	191	branch = b;
	192	reflogs = read_complete_reflog(branch);
	193	}
	194	}
5026b471	195	if (!reflogs \|\| reflogs->nr == 0) {
e30d463d	196	free_complete_reflog(reflogs);
5026b471	197	free(branch);
7b69b873	198	return -1;
5026b471	199	}
78a395d3	200	string_list_insert(&info->complete_reflogs, branch)->util
8860fd42 JS	201	= reflogs;
8860fd42 JS	202	}
5026b471	203	free(branch);
8860fd42	204
ca56dadb	205	CALLOC_ARRAY(commit_reflog, 1);
8860fd42	206	if (recno < 0) {
8860fd42 JS	207	commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
8860fd42 JS	208	if (commit_reflog->recno < 0) {
8860fd42	209	free(commit_reflog);
7b69b873	210	return -1;
8860fd42 JS	211	}
	212	} else
	213	commit_reflog->recno = reflogs->nr - recno - 1;
a763126b	214	commit_reflog->selector = selector;
8860fd42 JS	215	commit_reflog->reflogs = reflogs;
8860fd42 JS	216
d08565bf JK	217	ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
d08565bf JK	218	info->logs[info->nr++] = commit_reflog;
8860fd42	219
d08565bf	220	return 0;
8860fd42 JS	221	}
8860fd42 JS	222
72b103fe TR	223	void get_reflog_selector(struct strbuf *sb,
72b103fe TR	224	struct reflog_walk_info *reflog_info,
a5481a6c	225	const struct date_mode *dmode, int force_date,
8f8f5476	226	int shorten)
72b103fe TR	227	{
	228	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	229	struct reflog_info *info;
8f8f5476	230	const char *printed_ref;
72b103fe TR	231
	232	if (!commit_reflog)
	233	return;
	234
8f8f5476 TR	235	if (shorten) {
	236	if (!commit_reflog->reflogs->short_ref)
	237	commit_reflog->reflogs->short_ref
	238	= shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
	239	printed_ref = commit_reflog->reflogs->short_ref;
	240	} else {
	241	printed_ref = commit_reflog->reflogs->ref;
	242	}
	243
	244	strbuf_addf(sb, "%s@{", printed_ref);
794151e9	245	if (commit_reflog->selector == SELECTOR_DATE \|\|
55ccf85a	246	(commit_reflog->selector == SELECTOR_NONE && force_date)) {
72b103fe TR	247	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	248	strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
	249	} else {
	250	strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
	251	- 2 - commit_reflog->recno);
	252	}
	253
	254	strbuf_addch(sb, '}');
	255	}
	256
8f8f5476 TR	257	void get_reflog_message(struct strbuf *sb,
	258	struct reflog_walk_info *reflog_info)
	259	{
	260	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	261	struct reflog_info *info;
	262	size_t len;
	263
	264	if (!commit_reflog)
	265	return;
	266
	267	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	268	len = strlen(info->message);
	269	if (len > 0)
	270	len--; /* strip away trailing newline */
	271	strbuf_add(sb, info->message, len);
	272	}
	273
cd1957f5 JK	274	const char get_reflog_ident(struct reflog_walk_info reflog_info)
	275	{
	276	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	277	struct reflog_info *info;
	278
	279	if (!commit_reflog)
	280	return NULL;
	281
	282	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	283	return info->email;
	284	}
	285
de239446 JK	286	timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
	287	{
	288	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
	289	struct reflog_info *info;
	290
	291	if (!commit_reflog)
	292	return 0;
	293
	294	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
	295	return info->timestamp;
	296	}
	297
72b103fe	298	void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
a5481a6c	299	const struct date_mode *dmode, int force_date)
8860fd42	300	{
72b103fe TR	301	if (reflog_info && reflog_info->last_commit_reflog) {
72b103fe TR	302	struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
8860fd42	303	struct reflog_info *info;
72b103fe	304	struct strbuf selector = STRBUF_INIT;
8860fd42	305
4d12a471	306	info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
55ccf85a	307	get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
4d12a471	308	if (oneline) {
72b103fe	309	printf("%s: %s", selector.buf, info->message);
4d12a471 JH	310	}
4d12a471 JH	311	else {
72b103fe TR	312	printf("Reflog: %s (%s)\nReflog message: %s",
72b103fe TR	313	selector.buf, info->email, info->message);
4d12a471	314	}
72b103fe TR	315
72b103fe TR	316	strbuf_release(&selector);
8860fd42 JS	317	}
8860fd42 JS	318	}
7f97de5e JK	319
	320	int reflog_walk_empty(struct reflog_walk_info *info)
	321	{
d08565bf JK	322	return !info \|\| !info->nr;
	323	}
	324
	325	static struct commit next_reflog_commit(struct commit_reflog log)
	326	{
	327	for (; log->recno >= 0; log->recno--) {
	328	struct reflog_info *entry = &log->reflogs->items[log->recno];
109cd76d SB	329	struct object *obj = parse_object(the_repository,
109cd76d SB	330	&entry->noid);
d08565bf JK	331
	332	if (obj && obj->type == OBJ_COMMIT)
	333	return (struct commit *)obj;
	334	}
	335	return NULL;
	336	}
	337
	338	static timestamp_t log_timestamp(struct commit_reflog *log)
	339	{
	340	return log->reflogs->items[log->recno].timestamp;
	341	}
	342
	343	struct commit next_reflog_entry(struct reflog_walk_info walk)
	344	{
	345	struct commit_reflog *best = NULL;
	346	struct commit *best_commit = NULL;
	347	size_t i;
	348
	349	for (i = 0; i < walk->nr; i++) {
	350	struct commit_reflog *log = walk->logs[i];
	351	struct commit *commit = next_reflog_commit(log);
	352
	353	if (!commit)
	354	continue;
	355
	356	if (!best \|\| log_timestamp(log) > log_timestamp(best)) {
	357	best = log;
	358	best_commit = commit;
	359	}
	360	}
	361
	362	if (best) {
	363	best->recno--;
	364	walk->last_commit_reflog = best;
	365	return best_commit;
	366	}
	367
	368	return NULL;
7f97de5e	369	}