[thirdparty/git.git] / builtin-fmt-merge-msg.c

#include "builtin.h"
#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "tag.h"

static const char *fmt_merge_msg_usage =
	"git-fmt-merge-msg [--log] [--no-log] [--file <file>]";

static int merge_summary;

static int fmt_merge_msg_config(const char *key, const char *value, void *cb)
{
	static int found_merge_log = 0;
	if (!strcmp("merge.log", key)) {
		found_merge_log = 1;
		merge_summary = git_config_bool(key, value);
	}
	if (!found_merge_log && !strcmp("merge.summary", key))
		merge_summary = git_config_bool(key, value);
	return 0;
}

struct list {
	char **list;
	void **payload;
	unsigned nr, alloc;
};

static void append_to_list(struct list *list, char *value, void *payload)
{
	if (list->nr == list->alloc) {
		list->alloc += 32;
		list->list = xrealloc(list->list, sizeof(char *) * list->alloc);
		list->payload = xrealloc(list->payload,
				sizeof(char *) * list->alloc);
	}
	list->payload[list->nr] = payload;
	list->list[list->nr++] = value;
}

static int find_in_list(struct list *list, char *value)
{
	int i;

	for (i = 0; i < list->nr; i++)
		if (!strcmp(list->list[i], value))
			return i;

	return -1;
}

static void free_list(struct list *list)
{
	int i;

	if (list->alloc == 0)
		return;

	for (i = 0; i < list->nr; i++) {
		free(list->list[i]);
		free(list->payload[i]);
	}
	free(list->list);
	free(list->payload);
	list->nr = list->alloc = 0;
}

struct src_data {
	struct list branch, tag, r_branch, generic;
	int head_status;
};

static struct list srcs = { NULL, NULL, 0, 0};
static struct list origins = { NULL, NULL, 0, 0};

static int handle_line(char *line)
{
	int i, len = strlen(line);
	unsigned char *sha1;
	char *src, *origin;
	struct src_data *src_data;
	int pulling_head = 0;

	if (len < 43 || line[40] != '\t')
		return 1;

	if (!prefixcmp(line + 41, "not-for-merge"))
		return 0;

	if (line[41] != '\t')
		return 2;

	line[40] = 0;
	sha1 = xmalloc(20);
	i = get_sha1(line, sha1);
	line[40] = '\t';
	if (i)
		return 3;

	if (line[len - 1] == '\n')
		line[len - 1] = 0;
	line += 42;

	src = strstr(line, " of ");
	if (src) {
		*src = 0;
		src += 4;
		pulling_head = 0;
	} else {
		src = line;
		pulling_head = 1;
	}

	i = find_in_list(&srcs, src);
	if (i < 0) {
		i = srcs.nr;
		append_to_list(&srcs, xstrdup(src),
				xcalloc(1, sizeof(struct src_data)));
	}
	src_data = srcs.payload[i];

	if (pulling_head) {
		origin = xstrdup(src);
		src_data->head_status |= 1;
	} else if (!prefixcmp(line, "branch ")) {
		origin = xstrdup(line + 7);
		append_to_list(&src_data->branch, origin, NULL);
		src_data->head_status |= 2;
	} else if (!prefixcmp(line, "tag ")) {
		origin = line;
		append_to_list(&src_data->tag, xstrdup(origin + 4), NULL);
		src_data->head_status |= 2;
	} else if (!prefixcmp(line, "remote branch ")) {
		origin = xstrdup(line + 14);
		append_to_list(&src_data->r_branch, origin, NULL);
		src_data->head_status |= 2;
	} else {
		origin = xstrdup(src);
		append_to_list(&src_data->generic, xstrdup(line), NULL);
		src_data->head_status |= 2;
	}

	if (!strcmp(".", src) || !strcmp(src, origin)) {
		int len = strlen(origin);
		if (origin[0] == '\'' && origin[len - 1] == '\'') {
			origin = xmemdupz(origin + 1, len - 2);
		} else {
			origin = xstrdup(origin);
		}
	} else {
		char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
		sprintf(new_origin, "%s of %s", origin, src);
		origin = new_origin;
	}
	append_to_list(&origins, origin, sha1);
	return 0;
}

static void print_joined(const char *singular, const char *plural,
		struct list *list)
{
	if (list->nr == 0)
		return;
	if (list->nr == 1) {
		printf("%s%s", singular, list->list[0]);
	} else {
		int i;
		printf("%s", plural);
		for (i = 0; i < list->nr - 1; i++)
			printf("%s%s", i > 0 ? ", " : "", list->list[i]);
		printf(" and %s", list->list[list->nr - 1]);
	}
}

static void shortlog(const char *name, unsigned char *sha1,
		struct commit *head, struct rev_info *rev, int limit)
{
	int i, count = 0;
	struct commit *commit;
	struct object *branch;
	struct list subjects = { NULL, NULL, 0, 0 };
	int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;

	branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
	if (!branch || branch->type != OBJ_COMMIT)
		return;

	setup_revisions(0, NULL, rev, NULL);
	rev->ignore_merges = 1;
	add_pending_object(rev, branch, name);
	add_pending_object(rev, &head->object, "^HEAD");
	head->object.flags |= UNINTERESTING;
	if (prepare_revision_walk(rev))
		die("revision walk setup failed");
	while ((commit = get_revision(rev)) != NULL) {
		char *oneline, *bol, *eol;

		/* ignore merges */
		if (commit->parents && commit->parents->next)
			continue;

		count++;
		if (subjects.nr > limit)
			continue;

		bol = strstr(commit->buffer, "\n\n");
		if (bol) {
			unsigned char c;
			do {
				c = *++bol;
			} while (isspace(c));
			if (!c)
				bol = NULL;
		}

		if (!bol) {
			append_to_list(&subjects, xstrdup(sha1_to_hex(
							commit->object.sha1)),
					NULL);
			continue;
		}

		eol = strchr(bol, '\n');
		if (eol) {
			oneline = xmemdupz(bol, eol - bol);
		} else {
			oneline = xstrdup(bol);
		}
		append_to_list(&subjects, oneline, NULL);
	}

	if (count > limit)
		printf("\n* %s: (%d commits)\n", name, count);
	else
		printf("\n* %s:\n", name);

	for (i = 0; i < subjects.nr; i++)
		if (i >= limit)
			printf("  ...\n");
		else
			printf("  %s\n", subjects.list[i]);

	clear_commit_marks((struct commit *)branch, flags);
	clear_commit_marks(head, flags);
	free_commit_list(rev->commits);
	rev->commits = NULL;
	rev->pending.nr = 0;

	free_list(&subjects);
}

int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
{
	int limit = 20, i = 0;
	char line[1024];
	FILE *in = stdin;
	const char *sep = "";
	unsigned char head_sha1[20];
	const char *current_branch;

	git_config(fmt_merge_msg_config, NULL);

	while (argc > 1) {
		if (!strcmp(argv[1], "--log") || !strcmp(argv[1], "--summary"))
			merge_summary = 1;
		else if (!strcmp(argv[1], "--no-log")
				|| !strcmp(argv[1], "--no-summary"))
			merge_summary = 0;
		else if (!strcmp(argv[1], "-F") || !strcmp(argv[1], "--file")) {
			if (argc < 3)
				die ("Which file?");
			if (!strcmp(argv[2], "-"))
				in = stdin;
			else {
				fclose(in);
				in = fopen(argv[2], "r");
				if (!in)
					die("cannot open %s", argv[2]);
			}
			argc--; argv++;
		} else
			break;
		argc--; argv++;
	}

	if (argc > 1)
		usage(fmt_merge_msg_usage);

	/* get current branch */
	current_branch = resolve_ref("HEAD", head_sha1, 1, NULL);
	if (!current_branch)
		die("No current branch");
	if (!prefixcmp(current_branch, "refs/heads/"))
		current_branch += 11;

	while (fgets(line, sizeof(line), in)) {
		i++;
		if (line[0] == 0)
			continue;
		if (handle_line(line))
			die ("Error in line %d: %s", i, line);
	}

	printf("Merge ");
	for (i = 0; i < srcs.nr; i++) {
		struct src_data *src_data = srcs.payload[i];
		const char *subsep = "";

		printf(sep);
		sep = "; ";

		if (src_data->head_status == 1) {
			printf(srcs.list[i]);
			continue;
		}
		if (src_data->head_status == 3) {
			subsep = ", ";
			printf("HEAD");
		}
		if (src_data->branch.nr) {
			printf(subsep);
			subsep = ", ";
			print_joined("branch ", "branches ", &src_data->branch);
		}
		if (src_data->r_branch.nr) {
			printf(subsep);
			subsep = ", ";
			print_joined("remote branch ", "remote branches ",
					&src_data->r_branch);
		}
		if (src_data->tag.nr) {
			printf(subsep);
			subsep = ", ";
			print_joined("tag ", "tags ", &src_data->tag);
		}
		if (src_data->generic.nr) {
			printf(subsep);
			print_joined("commit ", "commits ", &src_data->generic);
		}
		if (strcmp(".", srcs.list[i]))
			printf(" of %s", srcs.list[i]);
	}

	if (!strcmp("master", current_branch))
		putchar('\n');
	else
		printf(" into %s\n", current_branch);

	if (merge_summary) {
		struct commit *head;
		struct rev_info rev;

		head = lookup_commit(head_sha1);
		init_revisions(&rev, prefix);
		rev.commit_format = CMIT_FMT_ONELINE;
		rev.ignore_merges = 1;
		rev.limited = 1;

		for (i = 0; i < origins.nr; i++)
			shortlog(origins.list[i], origins.payload[i],
					head, &rev, limit);
	}

	/* No cleanup yet; is standalone anyway */

	return 0;
}
Commit	Line	Data
25f38f06	1	#include "builtin.h"
00449f99 JS	2	#include "cache.h"
	3	#include "commit.h"
	4	#include "diff.h"
	5	#include "revision.h"
	6	#include "tag.h"
	7
	8	static const char *fmt_merge_msg_usage =
6cd9cfef	9	"git-fmt-merge-msg [--log] [--no-log] [--file <file>]";
00449f99	10
96f1e58f	11	static int merge_summary;
00449f99	12
ef90d6d4	13	static int fmt_merge_msg_config(const char key, const char value, void *cb)
00449f99	14	{
6cd9cfef SG	15	static int found_merge_log = 0;
	16	if (!strcmp("merge.log", key)) {
	17	found_merge_log = 1;
	18	merge_summary = git_config_bool(key, value);
	19	}
	20	if (!found_merge_log && !strcmp("merge.summary", key))
00449f99 JS	21	merge_summary = git_config_bool(key, value);
	22	return 0;
	23	}
	24
	25	struct list {
	26	char **list;
	27	void **payload;
	28	unsigned nr, alloc;
	29	};
	30
	31	static void append_to_list(struct list list, char value, void *payload)
	32	{
	33	if (list->nr == list->alloc) {
	34	list->alloc += 32;
83572c1a JF	35	list->list = xrealloc(list->list, sizeof(char ) list->alloc);
83572c1a JF	36	list->payload = xrealloc(list->payload,
00449f99 JS	37	sizeof(char ) list->alloc);
	38	}
	39	list->payload[list->nr] = payload;
	40	list->list[list->nr++] = value;
	41	}
	42
	43	static int find_in_list(struct list list, char value)
	44	{
	45	int i;
	46
	47	for (i = 0; i < list->nr; i++)
	48	if (!strcmp(list->list[i], value))
	49	return i;
	50
	51	return -1;
	52	}
	53
	54	static void free_list(struct list *list)
	55	{
	56	int i;
	57
	58	if (list->alloc == 0)
	59	return;
	60
	61	for (i = 0; i < list->nr; i++) {
	62	free(list->list[i]);
4cac42b1	63	free(list->payload[i]);
00449f99 JS	64	}
	65	free(list->list);
	66	free(list->payload);
	67	list->nr = list->alloc = 0;
	68	}
	69
	70	struct src_data {
	71	struct list branch, tag, r_branch, generic;
	72	int head_status;
	73	};
	74
	75	static struct list srcs = { NULL, NULL, 0, 0};
	76	static struct list origins = { NULL, NULL, 0, 0};
	77
	78	static int handle_line(char *line)
	79	{
	80	int i, len = strlen(line);
	81	unsigned char *sha1;
	82	char src, origin;
	83	struct src_data *src_data;
e918c6ab	84	int pulling_head = 0;
00449f99 JS	85
	86	if (len < 43 \|\| line[40] != '\t')
	87	return 1;
	88
cc44c765	89	if (!prefixcmp(line + 41, "not-for-merge"))
00449f99 JS	90	return 0;
	91
	92	if (line[41] != '\t')
	93	return 2;
	94
	95	line[40] = 0;
	96	sha1 = xmalloc(20);
	97	i = get_sha1(line, sha1);
	98	line[40] = '\t';
	99	if (i)
	100	return 3;
	101
	102	if (line[len - 1] == '\n')
	103	line[len - 1] = 0;
	104	line += 42;
	105
	106	src = strstr(line, " of ");
	107	if (src) {
	108	*src = 0;
	109	src += 4;
e918c6ab JH	110	pulling_head = 0;
	111	} else {
	112	src = line;
	113	pulling_head = 1;
	114	}
00449f99 JS	115
	116	i = find_in_list(&srcs, src);
	117	if (i < 0) {
	118	i = srcs.nr;
9befac47	119	append_to_list(&srcs, xstrdup(src),
00449f99 JS	120	xcalloc(1, sizeof(struct src_data)));
	121	}
	122	src_data = srcs.payload[i];
	123
e918c6ab	124	if (pulling_head) {
9befac47	125	origin = xstrdup(src);
e918c6ab	126	src_data->head_status \|= 1;
cc44c765	127	} else if (!prefixcmp(line, "branch ")) {
9befac47	128	origin = xstrdup(line + 7);
00449f99 JS	129	append_to_list(&src_data->branch, origin, NULL);
00449f99 JS	130	src_data->head_status \|= 2;
cc44c765	131	} else if (!prefixcmp(line, "tag ")) {
00449f99	132	origin = line;
9befac47	133	append_to_list(&src_data->tag, xstrdup(origin + 4), NULL);
00449f99	134	src_data->head_status \|= 2;
cc44c765	135	} else if (!prefixcmp(line, "remote branch ")) {
9befac47	136	origin = xstrdup(line + 14);
00449f99 JS	137	append_to_list(&src_data->r_branch, origin, NULL);
00449f99 JS	138	src_data->head_status \|= 2;
00449f99	139	} else {
9befac47 SP	140	origin = xstrdup(src);
9befac47 SP	141	append_to_list(&src_data->generic, xstrdup(line), NULL);
00449f99 JS	142	src_data->head_status \|= 2;
	143	}
	144
	145	if (!strcmp(".", src) \|\| !strcmp(src, origin)) {
	146	int len = strlen(origin);
	147	if (origin[0] == '\'' && origin[len - 1] == '\'') {
182af834 PH	148	origin = xmemdupz(origin + 1, len - 2);
182af834 PH	149	} else {
9befac47	150	origin = xstrdup(origin);
182af834	151	}
00449f99	152	} else {
2d7320d0	153	char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
00449f99 JS	154	sprintf(new_origin, "%s of %s", origin, src);
	155	origin = new_origin;
	156	}
	157	append_to_list(&origins, origin, sha1);
	158	return 0;
	159	}
	160
	161	static void print_joined(const char singular, const char plural,
	162	struct list *list)
	163	{
	164	if (list->nr == 0)
	165	return;
	166	if (list->nr == 1) {
	167	printf("%s%s", singular, list->list[0]);
	168	} else {
	169	int i;
	170	printf("%s", plural);
	171	for (i = 0; i < list->nr - 1; i++)
	172	printf("%s%s", i > 0 ? ", " : "", list->list[i]);
	173	printf(" and %s", list->list[list->nr - 1]);
	174	}
	175	}
	176
	177	static void shortlog(const char name, unsigned char sha1,
	178	struct commit head, struct rev_info rev, int limit)
	179	{
	180	int i, count = 0;
	181	struct commit *commit;
	182	struct object *branch;
	183	struct list subjects = { NULL, NULL, 0, 0 };
7dc0fe3b	184	int flags = UNINTERESTING \| TREESAME \| SEEN \| SHOWN \| ADDED;
00449f99 JS	185
00449f99 JS	186	branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
1974632c	187	if (!branch \|\| branch->type != OBJ_COMMIT)
00449f99 JS	188	return;
	189
	190	setup_revisions(0, NULL, rev, NULL);
	191	rev->ignore_merges = 1;
	192	add_pending_object(rev, branch, name);
	193	add_pending_object(rev, &head->object, "^HEAD");
	194	head->object.flags \|= UNINTERESTING;
3d51e1b5 MK	195	if (prepare_revision_walk(rev))
3d51e1b5 MK	196	die("revision walk setup failed");
00449f99 JS	197	while ((commit = get_revision(rev)) != NULL) {
	198	char oneline, bol, *eol;
	199
	200	/* ignore merges */
	201	if (commit->parents && commit->parents->next)
	202	continue;
	203
	204	count++;
	205	if (subjects.nr > limit)
	206	continue;
	207
	208	bol = strstr(commit->buffer, "\n\n");
6a28518a LT	209	if (bol) {
	210	unsigned char c;
	211	do {
	212	c = *++bol;
	213	} while (isspace(c));
	214	if (!c)
	215	bol = NULL;
	216	}
	217
00449f99	218	if (!bol) {
9befac47	219	append_to_list(&subjects, xstrdup(sha1_to_hex(
00449f99 JS	220	commit->object.sha1)),
	221	NULL);
	222	continue;
	223	}
	224
00449f99	225	eol = strchr(bol, '\n');
00449f99	226	if (eol) {
182af834 PH	227	oneline = xmemdupz(bol, eol - bol);
182af834 PH	228	} else {
9befac47	229	oneline = xstrdup(bol);
182af834	230	}
00449f99 JS	231	append_to_list(&subjects, oneline, NULL);
	232	}
	233
	234	if (count > limit)
	235	printf("\n* %s: (%d commits)\n", name, count);
	236	else
	237	printf("\n* %s:\n", name);
	238
	239	for (i = 0; i < subjects.nr; i++)
	240	if (i >= limit)
	241	printf(" ...\n");
	242	else
	243	printf(" %s\n", subjects.list[i]);
	244
	245	clear_commit_marks((struct commit *)branch, flags);
	246	clear_commit_marks(head, flags);
	247	free_commit_list(rev->commits);
	248	rev->commits = NULL;
	249	rev->pending.nr = 0;
	250
	251	free_list(&subjects);
	252	}
	253
25f38f06	254	int cmd_fmt_merge_msg(int argc, const char *argv, const char prefix)
00449f99 JS	255	{
	256	int limit = 20, i = 0;
	257	char line[1024];
	258	FILE *in = stdin;
	259	const char *sep = "";
	260	unsigned char head_sha1[20];
ed378ec7	261	const char *current_branch;
00449f99	262
ef90d6d4	263	git_config(fmt_merge_msg_config, NULL);
00449f99 JS	264
00449f99 JS	265	while (argc > 1) {
6cd9cfef	266	if (!strcmp(argv[1], "--log") \|\| !strcmp(argv[1], "--summary"))
00449f99	267	merge_summary = 1;
6cd9cfef SG	268	else if (!strcmp(argv[1], "--no-log")
6cd9cfef SG	269	\|\| !strcmp(argv[1], "--no-summary"))
00449f99 JS	270	merge_summary = 0;
00449f99 JS	271	else if (!strcmp(argv[1], "-F") \|\| !strcmp(argv[1], "--file")) {
163d7b9b	272	if (argc < 3)
00449f99 JS	273	die ("Which file?");
	274	if (!strcmp(argv[2], "-"))
	275	in = stdin;
	276	else {
	277	fclose(in);
	278	in = fopen(argv[2], "r");
163d7b9b MC	279	if (!in)
163d7b9b MC	280	die("cannot open %s", argv[2]);
00449f99 JS	281	}
	282	argc--; argv++;
	283	} else
	284	break;
	285	argc--; argv++;
	286	}
	287
	288	if (argc > 1)
	289	usage(fmt_merge_msg_usage);
	290
	291	/* get current branch */
8da19775	292	current_branch = resolve_ref("HEAD", head_sha1, 1, NULL);
6b1f8c32 LT	293	if (!current_branch)
6b1f8c32 LT	294	die("No current branch");
cc44c765	295	if (!prefixcmp(current_branch, "refs/heads/"))
00449f99 JS	296	current_branch += 11;
	297
	298	while (fgets(line, sizeof(line), in)) {
	299	i++;
	300	if (line[0] == 0)
	301	continue;
	302	if (handle_line(line))
	303	die ("Error in line %d: %s", i, line);
	304	}
	305
	306	printf("Merge ");
	307	for (i = 0; i < srcs.nr; i++) {
	308	struct src_data *src_data = srcs.payload[i];
	309	const char *subsep = "";
	310
	311	printf(sep);
	312	sep = "; ";
	313
	314	if (src_data->head_status == 1) {
	315	printf(srcs.list[i]);
	316	continue;
	317	}
	318	if (src_data->head_status == 3) {
	319	subsep = ", ";
	320	printf("HEAD");
	321	}
	322	if (src_data->branch.nr) {
	323	printf(subsep);
	324	subsep = ", ";
	325	print_joined("branch ", "branches ", &src_data->branch);
	326	}
	327	if (src_data->r_branch.nr) {
	328	printf(subsep);
	329	subsep = ", ";
	330	print_joined("remote branch ", "remote branches ",
	331	&src_data->r_branch);
	332	}
	333	if (src_data->tag.nr) {
	334	printf(subsep);
	335	subsep = ", ";
	336	print_joined("tag ", "tags ", &src_data->tag);
	337	}
	338	if (src_data->generic.nr) {
	339	printf(subsep);
	340	print_joined("commit ", "commits ", &src_data->generic);
	341	}
	342	if (strcmp(".", srcs.list[i]))
	343	printf(" of %s", srcs.list[i]);
	344	}
	345
	346	if (!strcmp("master", current_branch))
	347	putchar('\n');
	348	else
	349	printf(" into %s\n", current_branch);
	350
	351	if (merge_summary) {
	352	struct commit *head;
	353	struct rev_info rev;
	354
	355	head = lookup_commit(head_sha1);
db6296a5	356	init_revisions(&rev, prefix);
00449f99 JS	357	rev.commit_format = CMIT_FMT_ONELINE;
	358	rev.ignore_merges = 1;
	359	rev.limited = 1;
	360
	361	for (i = 0; i < origins.nr; i++)
	362	shortlog(origins.list[i], origins.payload[i],
	363	head, &rev, limit);
	364	}
	365
	366	/* No cleanup yet; is standalone anyway */
	367
	368	return 0;
	369	}