[thirdparty/git.git] / diff-helper.c

/*
 * Copyright (C) 2005 Junio C Hamano
 */
#include "cache.h"
#include "strbuf.h"
#include "diff.h"

static const char *pickaxe = NULL;
static int pickaxe_opts = 0;
static const char *orderfile = NULL;
static const char *diff_filter = NULL;
static int line_termination = '\n';
static int inter_name_termination = '\t';

static void flush_them(int ac, const char **av)
{
	diffcore_std_no_resolve(av + 1,
				pickaxe, pickaxe_opts,
				orderfile, diff_filter);
	diff_flush(DIFF_FORMAT_PATCH, '\n');
}

static const char diff_helper_usage[] =
"git-diff-helper [-z] [-O<orderfile>] [-S<string>] [--pickaxe-all] [<path>...]";

int main(int ac, const char **av) {
	struct strbuf sb;
	const char *garbage_flush_format;

	strbuf_init(&sb);

	while (1 < ac && av[1][0] == '-') {
		if (av[1][1] == 'z')
			line_termination = inter_name_termination = 0;
		else if (av[1][1] == 'S') {
			pickaxe = av[1] + 2;
		}
		else if (!strcmp(av[1], "--pickaxe-all"))
			pickaxe_opts = DIFF_PICKAXE_ALL;
		else if (!strncmp(av[1], "--diff-filter=", 14))
			diff_filter = av[1] + 14;
		else if (!strncmp(av[1], "-O", 2))
			orderfile = av[1] + 2;
		else
			usage(diff_helper_usage);
		ac--; av++;
	}
	garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n";

	/* the remaining parameters are paths patterns */

	diff_setup(0);
	while (1) {
		unsigned old_mode, new_mode;
		unsigned char old_sha1[20], new_sha1[20];
		char old_path[PATH_MAX];
		int status, score, two_paths;
		char new_path[PATH_MAX];

		int ch;
		char *cp, *ep;

		read_line(&sb, stdin, line_termination);
		if (sb.eof)
			break;
		switch (sb.buf[0]) {
		case ':':
			/* parse the first part up to the status */
			cp = sb.buf + 1;
			old_mode = new_mode = 0;
			while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
				old_mode = (old_mode << 3) | (ch - '0');
				cp++;
			}
			if (*cp++ != ' ')
				break;
			while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
				new_mode = (new_mode << 3) | (ch - '0');
				cp++;
			}
			if (*cp++ != ' ')
				break;
			if (get_sha1_hex(cp, old_sha1))
				break;
			cp += 40;
			if (*cp++ != ' ')
				break;
			if (get_sha1_hex(cp, new_sha1))
				break;
			cp += 40;
			if (*cp++ != ' ')
				break;
			status = *cp++;
			if (!strchr("MCRNDU", status))
				break;
			two_paths = score = 0;
			if (status == DIFF_STATUS_RENAMED ||
			    status == DIFF_STATUS_COPIED)
				two_paths = 1;

			/* pick up score if exists */
			if (sscanf(cp, "%d", &score) != 1)
				score = 0;
			cp = strchr(cp,
				    inter_name_termination);
			if (!cp)
				break;
			if (*cp++ != inter_name_termination)
				break;

			/* first pathname */
			if (!line_termination) {
				read_line(&sb, stdin, line_termination);
				if (sb.eof)
					break;
				strcpy(old_path, sb.buf);
			}
			else if (!two_paths)
				strcpy(old_path, cp);
			else {
				ep = strchr(cp, inter_name_termination);
				if (!ep)
					break;
				strncpy(old_path, cp, ep-cp);
				old_path[ep-cp] = 0;
				cp = ep + 1;
			}

			/* second pathname */
			if (!two_paths)
				strcpy(new_path, old_path);
			else {
				if (!line_termination) {
					read_line(&sb, stdin,
						  line_termination);
					if (sb.eof)
						break;
					strcpy(new_path, sb.buf);
				}
				else
					strcpy(new_path, cp);
			}
			diff_helper_input(old_mode, new_mode,
					  old_sha1, new_sha1,
					  old_path, status, score,
					  new_path);
			continue;
		}
		flush_them(ac, av);
		printf(garbage_flush_format, sb.buf);
	}
	flush_them(ac, av);
	return 0;
}
Commit	Line	Data
be3cfa85 JH	1	/*
	2	* Copyright (C) 2005 Junio C Hamano
	3	*/
d1df5743 JH	4	#include "cache.h"
	5	#include "strbuf.h"
	6	#include "diff.h"
	7
057c7d30	8	static const char *pickaxe = NULL;
367cec1c	9	static int pickaxe_opts = 0;
ce240675	10	static const char *orderfile = NULL;
f2ce9fde	11	static const char *diff_filter = NULL;
81e50eab JH	12	static int line_termination = '\n';
81e50eab JH	13	static int inter_name_termination = '\t';
915838c3	14
ce240675 JH	15	static void flush_them(int ac, const char **av)
ce240675 JH	16	{
f2ce9fde JH	17	diffcore_std_no_resolve(av + 1,
	18	pickaxe, pickaxe_opts,
	19	orderfile, diff_filter);
e68b6f15	20	diff_flush(DIFF_FORMAT_PATCH, '\n');
ce240675 JH	21	}
ce240675 JH	22
4d1f1190	23	static const char diff_helper_usage[] =
232b75ab	24	"git-diff-helper [-z] [-O<orderfile>] [-S<string>] [--pickaxe-all] [<path>...]";
d1df5743	25
91a6eaa0	26	int main(int ac, const char **av) {
b6d8f309	27	struct strbuf sb;
2bc25641	28	const char *garbage_flush_format;
d1df5743	29
b6d8f309	30	strbuf_init(&sb);
d1df5743 JH	31
d1df5743 JH	32	while (1 < ac && av[1][0] == '-') {
b6d8f309	33	if (av[1][1] == 'z')
81e50eab	34	line_termination = inter_name_termination = 0;
52e95789 JH	35	else if (av[1][1] == 'S') {
	36	pickaxe = av[1] + 2;
	37	}
367cec1c JH	38	else if (!strcmp(av[1], "--pickaxe-all"))
367cec1c JH	39	pickaxe_opts = DIFF_PICKAXE_ALL;
f2ce9fde JH	40	else if (!strncmp(av[1], "--diff-filter=", 14))
	41	diff_filter = av[1] + 14;
	42	else if (!strncmp(av[1], "-O", 2))
	43	orderfile = av[1] + 2;
d1df5743	44	else
902b92e0	45	usage(diff_helper_usage);
d1df5743 JH	46	ac--; av++;
d1df5743 JH	47	}
2bc25641 JH	48	garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n";
2bc25641 JH	49
d1df5743 JH	50	/* the remaining parameters are paths patterns */
d1df5743 JH	51
b6d8f309	52	diff_setup(0);
d1df5743	53	while (1) {
b6d8f309 JH	54	unsigned old_mode, new_mode;
	55	unsigned char old_sha1[20], new_sha1[20];
	56	char old_path[PATH_MAX];
	57	int status, score, two_paths;
	58	char new_path[PATH_MAX];
	59
	60	int ch;
	61	char cp, ep;
	62
	63	read_line(&sb, stdin, line_termination);
	64	if (sb.eof)
d1df5743	65	break;
b6d8f309	66	switch (sb.buf[0]) {
81e50eab	67	case ':':
b6d8f309 JH	68	/* parse the first part up to the status */
	69	cp = sb.buf + 1;
	70	old_mode = new_mode = 0;
	71	while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
	72	old_mode = (old_mode << 3) \| (ch - '0');
	73	cp++;
	74	}
	75	if (*cp++ != ' ')
81e50eab	76	break;
b6d8f309 JH	77	while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
	78	new_mode = (new_mode << 3) \| (ch - '0');
	79	cp++;
	80	}
	81	if (*cp++ != ' ')
81e50eab	82	break;
b6d8f309 JH	83	if (get_sha1_hex(cp, old_sha1))
	84	break;
	85	cp += 40;
	86	if (*cp++ != ' ')
	87	break;
	88	if (get_sha1_hex(cp, new_sha1))
	89	break;
	90	cp += 40;
	91	if (*cp++ != ' ')
	92	break;
	93	status = *cp++;
	94	if (!strchr("MCRNDU", status))
	95	break;
	96	two_paths = score = 0;
e7baa4f4 JH	97	if (status == DIFF_STATUS_RENAMED \|\|
e7baa4f4 JH	98	status == DIFF_STATUS_COPIED)
b6d8f309	99	two_paths = 1;
b6d8f309	100
ddafa7e9 JH	101	/* pick up score if exists */
	102	if (sscanf(cp, "%d", &score) != 1)
	103	score = 0;
	104	cp = strchr(cp,
	105	inter_name_termination);
	106	if (!cp)
	107	break;
b6d8f309 JH	108	if (*cp++ != inter_name_termination)
	109	break;
	110
	111	/* first pathname */
	112	if (!line_termination) {
	113	read_line(&sb, stdin, line_termination);
	114	if (sb.eof)
	115	break;
	116	strcpy(old_path, sb.buf);
	117	}
	118	else if (!two_paths)
	119	strcpy(old_path, cp);
	120	else {
	121	ep = strchr(cp, inter_name_termination);
	122	if (!ep)
	123	break;
	124	strncpy(old_path, cp, ep-cp);
	125	old_path[ep-cp] = 0;
	126	cp = ep + 1;
	127	}
	128
	129	/* second pathname */
	130	if (!two_paths)
	131	strcpy(new_path, old_path);
	132	else {
	133	if (!line_termination) {
	134	read_line(&sb, stdin,
	135	line_termination);
	136	if (sb.eof)
	137	break;
	138	strcpy(new_path, sb.buf);
	139	}
	140	else
	141	strcpy(new_path, cp);
	142	}
	143	diff_helper_input(old_mode, new_mode,
	144	old_sha1, new_sha1,
	145	old_path, status, score,
	146	new_path);
	147	continue;
e11b29c5	148	}
ce240675	149	flush_them(ac, av);
2bc25641	150	printf(garbage_flush_format, sb.buf);
d1df5743	151	}
ce240675	152	flush_them(ac, av);
d1df5743 JH	153	return 0;
d1df5743 JH	154	}