[thirdparty/git.git] / log-tree.c

#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "log-tree.h"
#include "reflog-walk.h"

struct decoration name_decoration = { "object names" };

static void show_parents(struct commit *commit, int abbrev)
{
	struct commit_list *p;
	for (p = commit->parents; p ; p = p->next) {
		struct commit *parent = p->item;
		printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
	}
}

static void show_decorations(struct commit *commit)
{
	const char *prefix;
	struct name_decoration *decoration;

	decoration = lookup_decoration(&name_decoration, &commit->object);
	if (!decoration)
		return;
	prefix = " (";
	while (decoration) {
		printf("%s%s", prefix, decoration->name);
		prefix = ", ";
		decoration = decoration->next;
	}
	putchar(')');
}

/*
 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
 * Signed-off-by: and Acked-by: lines.
 */
static int detect_any_signoff(char *letter, int size)
{
	char ch, *cp;
	int seen_colon = 0;
	int seen_at = 0;
	int seen_name = 0;
	int seen_head = 0;

	cp = letter + size;
	while (letter <= --cp && (ch = *cp) == '\n')
		continue;

	while (letter <= cp) {
		ch = *cp--;
		if (ch == '\n')
			break;

		if (!seen_at) {
			if (ch == '@')
				seen_at = 1;
			continue;
		}
		if (!seen_colon) {
			if (ch == '@')
				return 0;
			else if (ch == ':')
				seen_colon = 1;
			else
				seen_name = 1;
			continue;
		}
		if (('A' <= ch && ch <= 'Z') ||
		    ('a' <= ch && ch <= 'z') ||
		    ch == '-') {
			seen_head = 1;
			continue;
		}
		/* no empty last line doesn't match */
		return 0;
	}
	return seen_head && seen_name;
}

static unsigned long append_signoff(char **buf_p, unsigned long *buf_sz_p,
				    unsigned long at, const char *signoff)
{
	static const char signed_off_by[] = "Signed-off-by: ";
	size_t signoff_len = strlen(signoff);
	int has_signoff = 0;
	char *cp;
	char *buf;
	unsigned long buf_sz;

	buf = *buf_p;
	buf_sz = *buf_sz_p;
	if (buf_sz <= at + strlen(signed_off_by) + signoff_len + 3) {
		buf_sz += strlen(signed_off_by) + signoff_len + 3;
		buf = xrealloc(buf, buf_sz);
		*buf_p = buf;
		*buf_sz_p = buf_sz;
	}
	cp = buf;

	/* First see if we already have the sign-off by the signer */
	while ((cp = strstr(cp, signed_off_by))) {

		has_signoff = 1;

		cp += strlen(signed_off_by);
		if (cp + signoff_len >= buf + at)
			break;
		if (strncmp(cp, signoff, signoff_len))
			continue;
		if (!isspace(cp[signoff_len]))
			continue;
		/* we already have him */
		return at;
	}

	if (!has_signoff)
		has_signoff = detect_any_signoff(buf, at);

	if (!has_signoff)
		buf[at++] = '\n';

	strcpy(buf + at, signed_off_by);
	at += strlen(signed_off_by);
	strcpy(buf + at, signoff);
	at += signoff_len;
	buf[at++] = '\n';
	buf[at] = 0;
	return at;
}

static unsigned int digits_in_number(unsigned int number)
{
	unsigned int i = 10, result = 1;
	while (i <= number) {
		i *= 10;
		result++;
	}
	return result;
}

void show_log(struct rev_info *opt, const char *sep)
{
	char *msgbuf = NULL;
	unsigned long msgbuf_len = 0;
	struct log_info *log = opt->loginfo;
	struct commit *commit = log->commit, *parent = log->parent;
	int abbrev = opt->diffopt.abbrev;
	int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
	const char *extra;
	int len;
	const char *subject = NULL, *extra_headers = opt->extra_headers;

	opt->loginfo = NULL;
	if (!opt->verbose_header) {
		if (opt->left_right) {
			if (commit->object.flags & BOUNDARY)
				putchar('-');
			else if (commit->object.flags & SYMMETRIC_LEFT)
				putchar('<');
			else
				putchar('>');
		}
		fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
		if (opt->parents)
			show_parents(commit, abbrev_commit);
		show_decorations(commit);
		putchar(opt->diffopt.line_termination);
		return;
	}

	/*
	 * The "oneline" format has several special cases:
	 *  - The pretty-printed commit lacks a newline at the end
	 *    of the buffer, but we do want to make sure that we
	 *    have a newline there. If the separator isn't already
	 *    a newline, add an extra one.
	 *  - unlike other log messages, the one-line format does
	 *    not have an empty line between entries.
	 */
	extra = "";
	if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
		extra = "\n";
	if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
		putchar(opt->diffopt.line_termination);
	opt->shown_one = 1;

	/*
	 * Print header line of header..
	 */

	if (opt->commit_format == CMIT_FMT_EMAIL) {
		char *sha1 = sha1_to_hex(commit->object.sha1);
		if (opt->total > 0) {
			static char buffer[64];
			snprintf(buffer, sizeof(buffer),
					"Subject: [%s %0*d/%d] ",
					opt->subject_prefix,
					digits_in_number(opt->total),
					opt->nr, opt->total);
			subject = buffer;
		} else if (opt->total == 0) {
			static char buffer[256];
			snprintf(buffer, sizeof(buffer),
					"Subject: [%s] ",
					opt->subject_prefix);
			subject = buffer;
		} else {
			subject = "Subject: ";
		}

		printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
		if (opt->message_id)
			printf("Message-Id: <%s>\n", opt->message_id);
		if (opt->ref_message_id)
			printf("In-Reply-To: <%s>\nReferences: <%s>\n",
			       opt->ref_message_id, opt->ref_message_id);
		if (opt->mime_boundary) {
			static char subject_buffer[1024];
			static char buffer[1024];
			snprintf(subject_buffer, sizeof(subject_buffer) - 1,
				 "%s"
				 "MIME-Version: 1.0\n"
				 "Content-Type: multipart/mixed;"
				 " boundary=\"%s%s\"\n"
				 "\n"
				 "This is a multi-part message in MIME "
				 "format.\n"
				 "--%s%s\n"
				 "Content-Type: text/plain; "
				 "charset=UTF-8; format=fixed\n"
				 "Content-Transfer-Encoding: 8bit\n\n",
				 extra_headers ? extra_headers : "",
				 mime_boundary_leader, opt->mime_boundary,
				 mime_boundary_leader, opt->mime_boundary);
			extra_headers = subject_buffer;

			snprintf(buffer, sizeof(buffer) - 1,
				 "--%s%s\n"
				 "Content-Type: text/x-patch;"
				 " name=\"%s.diff\"\n"
				 "Content-Transfer-Encoding: 8bit\n"
				 "Content-Disposition: %s;"
				 " filename=\"%s.diff\"\n\n",
				 mime_boundary_leader, opt->mime_boundary,
				 sha1,
				 opt->no_inline ? "attachment" : "inline",
				 sha1);
			opt->diffopt.stat_sep = buffer;
		}
	} else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
		fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
		      stdout);
		if (opt->commit_format != CMIT_FMT_ONELINE)
			fputs("commit ", stdout);
		if (commit->object.flags & BOUNDARY)
			putchar('-');
		else if (opt->left_right) {
			if (commit->object.flags & SYMMETRIC_LEFT)
				putchar('<');
			else
				putchar('>');
		}
		fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
		      stdout);
		if (opt->parents)
			show_parents(commit, abbrev_commit);
		if (parent)
			printf(" (from %s)",
			       diff_unique_abbrev(parent->object.sha1,
						  abbrev_commit));
		show_decorations(commit);
		printf("%s",
		       diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
		putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
		if (opt->reflog_info) {
			show_reflog_message(opt->reflog_info,
				    opt->commit_format == CMIT_FMT_ONELINE,
				    opt->date_mode);
			if (opt->commit_format == CMIT_FMT_ONELINE) {
				printf("%s", sep);
				return;
			}
		}
	}

	/*
	 * And then the pretty-printed message itself
	 */
	len = pretty_print_commit(opt->commit_format, commit, ~0u,
				  &msgbuf, &msgbuf_len, abbrev, subject,
				  extra_headers, opt->date_mode);

	if (opt->add_signoff)
		len = append_signoff(&msgbuf, &msgbuf_len, len,
				     opt->add_signoff);
	printf("%s%s%s", msgbuf, extra, sep);
	free(msgbuf);
}

int log_tree_diff_flush(struct rev_info *opt)
{
	diffcore_std(&opt->diffopt);

	if (diff_queue_is_empty()) {
		int saved_fmt = opt->diffopt.output_format;
		opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
		diff_flush(&opt->diffopt);
		opt->diffopt.output_format = saved_fmt;
		return 0;
	}

	if (opt->loginfo && !opt->no_commit_id) {
		/* When showing a verbose header (i.e. log message),
		 * and not in --pretty=oneline format, we would want
		 * an extra newline between the end of log and the
		 * output for readability.
		 */
		show_log(opt, opt->diffopt.msg_sep);
		if (opt->verbose_header &&
		    opt->commit_format != CMIT_FMT_ONELINE) {
			int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
			if ((pch & opt->diffopt.output_format) == pch)
				printf("---");
			putchar('\n');
		}
	}
	diff_flush(&opt->diffopt);
	return 1;
}

static int do_diff_combined(struct rev_info *opt, struct commit *commit)
{
	unsigned const char *sha1 = commit->object.sha1;

	diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
	return !opt->loginfo;
}

/*
 * Show the diff of a commit.
 *
 * Return true if we printed any log info messages
 */
static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
{
	int showed_log;
	struct commit_list *parents;
	unsigned const char *sha1 = commit->object.sha1;

	if (!opt->diff)
		return 0;

	/* Root commit? */
	parents = commit->parents;
	if (!parents) {
		if (opt->show_root_diff) {
			diff_root_tree_sha1(sha1, "", &opt->diffopt);
			log_tree_diff_flush(opt);
		}
		return !opt->loginfo;
	}

	/* More than one parent? */
	if (parents && parents->next) {
		if (opt->ignore_merges)
			return 0;
		else if (opt->combine_merges)
			return do_diff_combined(opt, commit);

		/* If we show individual diffs, show the parent info */
		log->parent = parents->item;
	}

	showed_log = 0;
	for (;;) {
		struct commit *parent = parents->item;

		diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
		log_tree_diff_flush(opt);

		showed_log |= !opt->loginfo;

		/* Set up the log info for the next parent, if any.. */
		parents = parents->next;
		if (!parents)
			break;
		log->parent = parents->item;
		opt->loginfo = log;
	}
	return showed_log;
}

int log_tree_commit(struct rev_info *opt, struct commit *commit)
{
	struct log_info log;
	int shown;

	log.commit = commit;
	log.parent = NULL;
	opt->loginfo = &log;

	shown = log_tree_diff(opt, commit, &log);
	if (!shown && opt->loginfo && opt->always_show_header) {
		log.parent = NULL;
		show_log(opt, "");
		shown = 1;
	}
	opt->loginfo = NULL;
	maybe_flush_or_die(stdout, "stdout");
	return shown;
}
Commit	Line	Data
5f1c3f07 JH	1	#include "cache.h"
	2	#include "diff.h"
	3	#include "commit.h"
	4	#include "log-tree.h"
8860fd42	5	#include "reflog-walk.h"
5f1c3f07	6
ca135e7a LT	7	struct decoration name_decoration = { "object names" };
ca135e7a LT	8
c8c893c6 LT	9	static void show_parents(struct commit *commit, int abbrev)
	10	{
	11	struct commit_list *p;
	12	for (p = commit->parents; p ; p = p->next) {
	13	struct commit *parent = p->item;
	14	printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
	15	}
	16	}
	17
ca135e7a LT	18	static void show_decorations(struct commit *commit)
	19	{
	20	const char *prefix;
	21	struct name_decoration *decoration;
	22
	23	decoration = lookup_decoration(&name_decoration, &commit->object);
	24	if (!decoration)
	25	return;
	26	prefix = " (";
	27	while (decoration) {
	28	printf("%s%s", prefix, decoration->name);
	29	prefix = ", ";
	30	decoration = decoration->next;
	31	}
	32	putchar(')');
	33	}
	34
fc1c75ec FBH	35	/*
	36	* Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
	37	* Signed-off-by: and Acked-by: lines.
	38	*/
	39	static int detect_any_signoff(char *letter, int size)
	40	{
	41	char ch, *cp;
	42	int seen_colon = 0;
	43	int seen_at = 0;
	44	int seen_name = 0;
	45	int seen_head = 0;
	46
	47	cp = letter + size;
	48	while (letter <= --cp && (ch = *cp) == '\n')
	49	continue;
	50
	51	while (letter <= cp) {
	52	ch = *cp--;
	53	if (ch == '\n')
	54	break;
	55
	56	if (!seen_at) {
	57	if (ch == '@')
	58	seen_at = 1;
	59	continue;
	60	}
	61	if (!seen_colon) {
	62	if (ch == '@')
	63	return 0;
	64	else if (ch == ':')
	65	seen_colon = 1;
	66	else
	67	seen_name = 1;
	68	continue;
	69	}
	70	if (('A' <= ch && ch <= 'Z') \|\|
	71	('a' <= ch && ch <= 'z') \|\|
	72	ch == '-') {
	73	seen_head = 1;
	74	continue;
	75	}
	76	/* no empty last line doesn't match */
	77	return 0;
	78	}
	79	return seen_head && seen_name;
	80	}
	81
80583c0e JH	82	static unsigned long append_signoff(char *buf_p, unsigned long buf_sz_p,
80583c0e JH	83	unsigned long at, const char *signoff)
cf2251b6	84	{
cf2251b6	85	static const char signed_off_by[] = "Signed-off-by: ";
80583c0e	86	size_t signoff_len = strlen(signoff);
fc1c75ec	87	int has_signoff = 0;
80583c0e JH	88	char *cp;
	89	char *buf;
	90	unsigned long buf_sz;
cf2251b6	91
80583c0e JH	92	buf = *buf_p;
	93	buf_sz = *buf_sz_p;
	94	if (buf_sz <= at + strlen(signed_off_by) + signoff_len + 3) {
	95	buf_sz += strlen(signed_off_by) + signoff_len + 3;
	96	buf = xrealloc(buf, buf_sz);
	97	*buf_p = buf;
	98	*buf_sz_p = buf_sz;
	99	}
	100	cp = buf;
cf2251b6 JH	101
cf2251b6 JH	102	/* First see if we already have the sign-off by the signer */
fc1c75ec FBH	103	while ((cp = strstr(cp, signed_off_by))) {
	104
	105	has_signoff = 1;
	106
cf2251b6	107	cp += strlen(signed_off_by);
fc1c75ec FBH	108	if (cp + signoff_len >= buf + at)
	109	break;
	110	if (strncmp(cp, signoff, signoff_len))
	111	continue;
	112	if (!isspace(cp[signoff_len]))
	113	continue;
	114	/* we already have him */
	115	return at;
cf2251b6 JH	116	}
cf2251b6 JH	117
fc1c75ec FBH	118	if (!has_signoff)
	119	has_signoff = detect_any_signoff(buf, at);
	120
	121	if (!has_signoff)
	122	buf[at++] = '\n';
c35f4c37	123
cf2251b6 JH	124	strcpy(buf + at, signed_off_by);
	125	at += strlen(signed_off_by);
	126	strcpy(buf + at, signoff);
	127	at += signoff_len;
	128	buf[at++] = '\n';
	129	buf[at] = 0;
	130	return at;
	131	}
	132
e00de24b JS	133	static unsigned int digits_in_number(unsigned int number)
	134	{
	135	unsigned int i = 10, result = 1;
	136	while (i <= number) {
	137	i *= 10;
	138	result++;
	139	}
	140	return result;
	141	}
	142
39bc9a6c	143	void show_log(struct rev_info opt, const char sep)
91539833	144	{
80583c0e JH	145	char *msgbuf = NULL;
80583c0e JH	146	unsigned long msgbuf_len = 0;
39bc9a6c	147	struct log_info *log = opt->loginfo;
91539833 LT	148	struct commit commit = log->commit, parent = log->parent;
	149	int abbrev = opt->diffopt.abbrev;
	150	int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
a4d34e2d	151	const char *extra;
91539833	152	int len;
20ff0680	153	const char subject = NULL, extra_headers = opt->extra_headers;
91539833 LT	154
	155	opt->loginfo = NULL;
	156	if (!opt->verbose_header) {
74bd9029 JH	157	if (opt->left_right) {
	158	if (commit->object.flags & BOUNDARY)
	159	putchar('-');
	160	else if (commit->object.flags & SYMMETRIC_LEFT)
	161	putchar('<');
	162	else
	163	putchar('>');
	164	}
c8c893c6 LT	165	fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
	166	if (opt->parents)
	167	show_parents(commit, abbrev_commit);
ca135e7a	168	show_decorations(commit);
1dcb6922	169	putchar(opt->diffopt.line_termination);
91539833 LT	170	return;
	171	}
	172
	173	/*
a4d34e2d LT	174	* The "oneline" format has several special cases:
	175	* - The pretty-printed commit lacks a newline at the end
	176	* of the buffer, but we do want to make sure that we
	177	* have a newline there. If the separator isn't already
	178	* a newline, add an extra one.
	179	* - unlike other log messages, the one-line format does
	180	* not have an empty line between entries.
91539833	181	*/
a4d34e2d LT	182	extra = "";
	183	if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
	184	extra = "\n";
91539833	185	if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
abd4e222	186	putchar(opt->diffopt.line_termination);
91539833 LT	187	opt->shown_one = 1;
	188
	189	/*
	190	* Print header line of header..
	191	*/
3eefc189	192
596524b3	193	if (opt->commit_format == CMIT_FMT_EMAIL) {
698ce6f8	194	char *sha1 = sha1_to_hex(commit->object.sha1);
596524b3 JS	195	if (opt->total > 0) {
	196	static char buffer[64];
	197	snprintf(buffer, sizeof(buffer),
2d9e4a47 RJ	198	"Subject: [%s %0*d/%d] ",
2d9e4a47 RJ	199	opt->subject_prefix,
e00de24b	200	digits_in_number(opt->total),
596524b3 JS	201	opt->nr, opt->total);
596524b3 JS	202	subject = buffer;
2d9e4a47 RJ	203	} else if (opt->total == 0) {
	204	static char buffer[256];
	205	snprintf(buffer, sizeof(buffer),
	206	"Subject: [%s] ",
	207	opt->subject_prefix);
	208	subject = buffer;
	209	} else {
8ac80a57	210	subject = "Subject: ";
2d9e4a47	211	}
8ac80a57	212
698ce6f8	213	printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
d1566f78 JT	214	if (opt->message_id)
	215	printf("Message-Id: <%s>\n", opt->message_id);
	216	if (opt->ref_message_id)
	217	printf("In-Reply-To: <%s>\nReferences: <%s>\n",
	218	opt->ref_message_id, opt->ref_message_id);
698ce6f8 JS	219	if (opt->mime_boundary) {
	220	static char subject_buffer[1024];
	221	static char buffer[1024];
	222	snprintf(subject_buffer, sizeof(subject_buffer) - 1,
20ff0680	223	"%s"
698ce6f8	224	"MIME-Version: 1.0\n"
33ee4cfb	225	"Content-Type: multipart/mixed;"
698ce6f8 JS	226	" boundary=\"%s%s\"\n"
	227	"\n"
	228	"This is a multi-part message in MIME "
	229	"format.\n"
	230	"--%s%s\n"
	231	"Content-Type: text/plain; "
	232	"charset=UTF-8; format=fixed\n"
	233	"Content-Transfer-Encoding: 8bit\n\n",
20ff0680	234	extra_headers ? extra_headers : "",
698ce6f8 JS	235	mime_boundary_leader, opt->mime_boundary,
698ce6f8 JS	236	mime_boundary_leader, opt->mime_boundary);
20ff0680	237	extra_headers = subject_buffer;
698ce6f8 JS	238
	239	snprintf(buffer, sizeof(buffer) - 1,
	240	"--%s%s\n"
33ee4cfb	241	"Content-Type: text/x-patch;"
698ce6f8 JS	242	" name=\"%s.diff\"\n"
698ce6f8 JS	243	"Content-Transfer-Encoding: 8bit\n"
33ee4cfb	244	"Content-Disposition: %s;"
698ce6f8 JS	245	" filename=\"%s.diff\"\n\n",
698ce6f8 JS	246	mime_boundary_leader, opt->mime_boundary,
c112f689 JS	247	sha1,
	248	opt->no_inline ? "attachment" : "inline",
	249	sha1);
698ce6f8 JS	250	opt->diffopt.stat_sep = buffer;
698ce6f8 JS	251	}
e52a5de4	252	} else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
74bd9029 JH	253	fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
	254	stdout);
	255	if (opt->commit_format != CMIT_FMT_ONELINE)
	256	fputs("commit ", stdout);
e330a406 LT	257	if (commit->object.flags & BOUNDARY)
	258	putchar('-');
	259	else if (opt->left_right) {
	260	if (commit->object.flags & SYMMETRIC_LEFT)
74bd9029 JH	261	putchar('<');
	262	else
	263	putchar('>');
	264	}
	265	fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
	266	stdout);
c66b6c06 JH	267	if (opt->parents)
c66b6c06 JH	268	show_parents(commit, abbrev_commit);
73f0a157	269	if (parent)
3eefc189 JH	270	printf(" (from %s)",
	271	diff_unique_abbrev(parent->object.sha1,
	272	abbrev_commit));
ca135e7a	273	show_decorations(commit);
ce436973 JK	274	printf("%s",
ce436973 JK	275	diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
e557667e	276	putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
903b45fe	277	if (opt->reflog_info) {
4d12a471	278	show_reflog_message(opt->reflog_info,
4e244cbc	279	opt->commit_format == CMIT_FMT_ONELINE,
a7b02ccf	280	opt->date_mode);
903b45fe NP	281	if (opt->commit_format == CMIT_FMT_ONELINE) {
	282	printf("%s", sep);
	283	return;
	284	}
	285	}
3eefc189	286	}
91539833 LT	287
	288	/*
	289	* And then the pretty-printed message itself
	290	*/
80583c0e JH	291	len = pretty_print_commit(opt->commit_format, commit, ~0u,
80583c0e JH	292	&msgbuf, &msgbuf_len, abbrev, subject,
a7b02ccf	293	extra_headers, opt->date_mode);
cf2251b6 JH	294
cf2251b6 JH	295	if (opt->add_signoff)
80583c0e	296	len = append_signoff(&msgbuf, &msgbuf_len, len,
cf2251b6	297	opt->add_signoff);
80583c0e JH	298	printf("%s%s%s", msgbuf, extra, sep);
80583c0e JH	299	free(msgbuf);
91539833 LT	300	}
91539833 LT	301
cd2bdc53	302	int log_tree_diff_flush(struct rev_info *opt)
5f1c3f07 JH	303	{
5f1c3f07 JH	304	diffcore_std(&opt->diffopt);
91539833	305
5f1c3f07 JH	306	if (diff_queue_is_empty()) {
	307	int saved_fmt = opt->diffopt.output_format;
	308	opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
	309	diff_flush(&opt->diffopt);
	310	opt->diffopt.output_format = saved_fmt;
	311	return 0;
	312	}
91539833	313
3969cf7d JH	314	if (opt->loginfo && !opt->no_commit_id) {
	315	/* When showing a verbose header (i.e. log message),
	316	* and not in --pretty=oneline format, we would want
	317	* an extra newline between the end of log and the
	318	* output for readability.
	319	*/
39bc9a6c	320	show_log(opt, opt->diffopt.msg_sep);
3969cf7d JH	321	if (opt->verbose_header &&
	322	opt->commit_format != CMIT_FMT_ONELINE) {
	323	int pch = DIFF_FORMAT_DIFFSTAT \| DIFF_FORMAT_PATCH;
	324	if ((pch & opt->diffopt.output_format) == pch)
abd4e222 LT	325	printf("---");
abd4e222 LT	326	putchar('\n');
3969cf7d JH	327	}
3969cf7d JH	328	}
5f1c3f07 JH	329	diff_flush(&opt->diffopt);
	330	return 1;
	331	}
	332
cd2bdc53	333	static int do_diff_combined(struct rev_info opt, struct commit commit)
5f1c3f07 JH	334	{
	335	unsigned const char *sha1 = commit->object.sha1;
	336
91539833 LT	337	diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
91539833 LT	338	return !opt->loginfo;
5f1c3f07 JH	339	}
5f1c3f07 JH	340
91539833 LT	341	/*
	342	* Show the diff of a commit.
	343	*
	344	* Return true if we printed any log info messages
	345	*/
	346	static int log_tree_diff(struct rev_info opt, struct commit commit, struct log_info *log)
5f1c3f07	347	{
91539833	348	int showed_log;
5f1c3f07 JH	349	struct commit_list *parents;
	350	unsigned const char *sha1 = commit->object.sha1;
	351
91539833 LT	352	if (!opt->diff)
	353	return 0;
	354
5f1c3f07	355	/* Root commit? */
91539833 LT	356	parents = commit->parents;
91539833 LT	357	if (!parents) {
2b60356d RS	358	if (opt->show_root_diff) {
	359	diff_root_tree_sha1(sha1, "", &opt->diffopt);
	360	log_tree_diff_flush(opt);
	361	}
91539833	362	return !opt->loginfo;
5f1c3f07 JH	363	}
	364
	365	/* More than one parent? */
91539833	366	if (parents && parents->next) {
5f1c3f07 JH	367	if (opt->ignore_merges)
	368	return 0;
	369	else if (opt->combine_merges)
	370	return do_diff_combined(opt, commit);
91539833 LT	371
	372	/* If we show individual diffs, show the parent info */
	373	log->parent = parents->item;
5f1c3f07 JH	374	}
5f1c3f07 JH	375
91539833 LT	376	showed_log = 0;
91539833 LT	377	for (;;) {
5f1c3f07	378	struct commit *parent = parents->item;
5f1c3f07	379
91539833 LT	380	diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
	381	log_tree_diff_flush(opt);
	382
	383	showed_log \|= !opt->loginfo;
	384
	385	/* Set up the log info for the next parent, if any.. */
	386	parents = parents->next;
	387	if (!parents)
	388	break;
	389	log->parent = parents->item;
	390	opt->loginfo = log;
	391	}
	392	return showed_log;
	393	}
	394
	395	int log_tree_commit(struct rev_info opt, struct commit commit)
	396	{
	397	struct log_info log;
3eefc189	398	int shown;
91539833 LT	399
	400	log.commit = commit;
	401	log.parent = NULL;
	402	opt->loginfo = &log;
	403
3eefc189 JH	404	shown = log_tree_diff(opt, commit, &log);
3eefc189 JH	405	if (!shown && opt->loginfo && opt->always_show_header) {
91539833	406	log.parent = NULL;
39bc9a6c	407	show_log(opt, "");
3eefc189	408	shown = 1;
5f1c3f07	409	}
91539833	410	opt->loginfo = NULL;
06f59e9f	411	maybe_flush_or_die(stdout, "stdout");
3eefc189	412	return shown;
5f1c3f07	413	}