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

/*
 * GIT - The information manager from hell
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"

#include <pwd.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
#include <time.h>

#define BLOCKING (1ul << 14)
#define ORIG_OFFSET (40)

/*
 * Leave space at the beginning to insert the tag
 * once we know how big things are.
 *
 * FIXME! Share the code with "write-tree.c"
 */
static void init_buffer(char **bufp, unsigned int *sizep)
{
	char *buf = malloc(BLOCKING);
	memset(buf, 0, ORIG_OFFSET);
	*sizep = ORIG_OFFSET;
	*bufp = buf;
}

static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
{
	char one_line[2048];
	va_list args;
	int len;
	unsigned long alloc, size, newsize;
	char *buf;

	va_start(args, fmt);
	len = vsnprintf(one_line, sizeof(one_line), fmt, args);
	va_end(args);
	size = *sizep;
	newsize = size + len;
	alloc = (size + 32767) & ~32767;
	buf = *bufp;
	if (newsize > alloc) {
		alloc = (newsize + 32767) & ~32767;
		buf = realloc(buf, alloc);
		*bufp = buf;
	}
	*sizep = newsize;
	memcpy(buf + size, one_line, len);
}

static int prepend_integer(char *buffer, unsigned val, int i)
{
	buffer[--i] = '\0';
	do {
		buffer[--i] = '0' + (val % 10);
		val /= 10;
	} while (val);
	return i;
}

static void finish_buffer(char *tag, char **bufp, unsigned int *sizep)
{
	int taglen;
	int offset;
	char *buf = *bufp;
	unsigned int size = *sizep;

	offset = prepend_integer(buf, size - ORIG_OFFSET, ORIG_OFFSET);
	taglen = strlen(tag);
	offset -= taglen;
	buf += offset;
	size -= offset;
	memcpy(buf, tag, taglen);

	*bufp = buf;
	*sizep = size;
}

static void remove_special(char *p)
{
	char c;
	char *dst = p;

	for (;;) {
		c = *p;
		p++;
		switch(c) {
		case '\n': case '<': case '>':
			continue;
		}
		*dst++ = c;
		if (!c)
			break;
	}
}

static const char *month_names[] = {
        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

static const char *weekday_names[] = {
        "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};


static char *skipfws(char *str)
{
	while (isspace(*str))
		str++;
	return str;
}

	
/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
   (i.e. English) day/month names, and it doesn't work correctly with %z. */
static void parse_rfc2822_date(char *date, char *result, int maxlen)
{
	struct tm tm;
	char *p;
	int i, offset;
	time_t then;

	memset(&tm, 0, sizeof(tm));

	/* Skip day-name */
	p = skipfws(date);
	if (!isdigit(*p)) {
		for (i=0; i<7; i++) {
			if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
				p = skipfws(p+4);
				goto day;
			}
		}
		return;
	}					

	/* day */
 day:
	tm.tm_mday = strtoul(p, &p, 10);

	if (tm.tm_mday < 1 || tm.tm_mday > 31)
		return;

	if (!isspace(*p))
		return;

	p = skipfws(p);

	/* month */

	for (i=0; i<12; i++) {
		if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
			tm.tm_mon = i;
			p = skipfws(p+strlen(month_names[i]));
			goto year;
		}
	}
	return; /* Error -- bad month */

	/* year */
 year:	
	tm.tm_year = strtoul(p, &p, 10);

	if (!tm.tm_year && !isspace(*p))
		return;

	if (tm.tm_year > 1900)
		tm.tm_year -= 1900;
		
	p=skipfws(p);

	/* hour */
	if (!isdigit(*p))
		return;
	tm.tm_hour = strtoul(p, &p, 10);
	
	if (!tm.tm_hour > 23)
		return;

	if (*p != ':')
		return; /* Error -- bad time */
	p++;

	/* minute */
	if (!isdigit(*p))
		return;
	tm.tm_min = strtoul(p, &p, 10);
	
	if (!tm.tm_min > 59)
		return;

	if (isspace(*p))
		goto zone;

	if (*p != ':')
		return; /* Error -- bad time */
	p++;

	/* second */
	if (!isdigit(*p))
		return;
	tm.tm_sec = strtoul(p, &p, 10);
	
	if (!tm.tm_sec > 59)
		return;

	if (!isspace(*p))
		return;

 zone:
	p = skipfws(p);

	if (*p == '-')
		offset = -60;
	else if (*p == '+')
		offset = 60;
	else
	       return;

	if (!isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3]) || !isdigit(p[4]))
		return;

	i = strtoul(p+1, NULL, 10);
	offset *= ((i % 100) + ((i / 100) * 60));

	if (*(skipfws(p + 5)))
		return;

	then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
	if (then == -1)
		return;

	then -= offset;

	snprintf(result, maxlen, "%lu %5.5s", then, p);
}

static void check_valid(unsigned char *sha1, const char *expect)
{
	void *buf;
	char type[20];
	unsigned long size;

	buf = read_sha1_file(sha1, type, &size);
	if (!buf || strcmp(type, expect))
		die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
	free(buf);
}

/*
 * Having more than two parents may be strange, but hey, there's
 * no conceptual reason why the file format couldn't accept multi-way
 * merges. It might be the "union" of several packages, for example.
 *
 * I don't really expect that to happen, but this is here to make
 * it clear that _conceptually_ it's ok..
 */
#define MAXPARENT (16)

int main(int argc, char **argv)
{
	int i, len;
	int parents = 0;
	unsigned char tree_sha1[20];
	unsigned char parent_sha1[MAXPARENT][20];
	unsigned char commit_sha1[20];
	char *gecos, *realgecos;
	char *email, realemail[1000];
	char date[20], realdate[20];
	char *audate;
	char comment[1000];
	struct passwd *pw;
	time_t now;
	struct tm *tm;
	char *buffer;
	unsigned int size;

	if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
		usage("commit-tree <sha1> [-p <sha1>]* < changelog");

	check_valid(tree_sha1, "tree");
	for (i = 2; i < argc; i += 2) {
		char *a, *b;
		a = argv[i]; b = argv[i+1];
		if (!b || strcmp(a, "-p") || get_sha1_hex(b, parent_sha1[parents]))
			usage("commit-tree <sha1> [-p <sha1>]* < changelog");
		check_valid(parent_sha1[parents], "commit");
		parents++;
	}
	if (!parents)
		fprintf(stderr, "Committing initial tree %s\n", argv[1]);
	pw = getpwuid(getuid());
	if (!pw)
		die("You don't exist. Go away!");
	realgecos = pw->pw_gecos;
	len = strlen(pw->pw_name);
	memcpy(realemail, pw->pw_name, len);
	realemail[len] = '@';
	gethostname(realemail+len+1, sizeof(realemail)-len-1);
	time(&now);
	tm = localtime(&now);

	strftime(realdate, sizeof(realdate), "%s %z", tm);
	strcpy(date, realdate);

	gecos = getenv("AUTHOR_NAME") ? : realgecos;
	email = getenv("AUTHOR_EMAIL") ? : realemail;
	audate = getenv("AUTHOR_DATE");
	if (audate)
		parse_rfc2822_date(audate, date, sizeof(date));

	remove_special(gecos); remove_special(realgecos);
	remove_special(email); remove_special(realemail);

	init_buffer(&buffer, &size);
	add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));

	/*
	 * NOTE! This ordering means that the same exact tree merged with a
	 * different order of parents will be a _different_ changeset even
	 * if everything else stays the same.
	 */
	for (i = 0; i < parents; i++)
		add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));

	/* Person/date information */
	add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
	add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", realgecos, realemail, realdate);

	/* And add the comment */
	while (fgets(comment, sizeof(comment), stdin) != NULL)
		add_buffer(&buffer, &size, "%s", comment);

	finish_buffer("commit ", &buffer, &size);

	write_sha1_file(buffer, size, commit_sha1);
	printf("%s\n", sha1_to_hex(commit_sha1));
	return 0;
}
Commit	Line	Data
8bc9a0c7 LT	1	/*
	2	* GIT - The information manager from hell
	3	*
	4	* Copyright (C) Linus Torvalds, 2005
	5	*/
e83c5163 LT	6	#include "cache.h"
	7
	8	#include <pwd.h>
	9	#include <time.h>
27de946d DW	10	#include <string.h>
	11	#include <ctype.h>
	12	#include <time.h>
e83c5163 LT	13
	14	#define BLOCKING (1ul << 14)
	15	#define ORIG_OFFSET (40)
	16
	17	/*
	18	* Leave space at the beginning to insert the tag
	19	* once we know how big things are.
	20	*
	21	* FIXME! Share the code with "write-tree.c"
	22	*/
	23	static void init_buffer(char *bufp, unsigned int sizep)
	24	{
	25	char *buf = malloc(BLOCKING);
	26	memset(buf, 0, ORIG_OFFSET);
	27	*sizep = ORIG_OFFSET;
	28	*bufp = buf;
	29	}
	30
	31	static void add_buffer(char *bufp, unsigned int sizep, const char *fmt, ...)
	32	{
	33	char one_line[2048];
	34	va_list args;
	35	int len;
	36	unsigned long alloc, size, newsize;
	37	char *buf;
	38
	39	va_start(args, fmt);
	40	len = vsnprintf(one_line, sizeof(one_line), fmt, args);
	41	va_end(args);
	42	size = *sizep;
	43	newsize = size + len;
	44	alloc = (size + 32767) & ~32767;
	45	buf = *bufp;
	46	if (newsize > alloc) {
aebb2679	47	alloc = (newsize + 32767) & ~32767;
e83c5163 LT	48	buf = realloc(buf, alloc);
	49	*bufp = buf;
	50	}
	51	*sizep = newsize;
	52	memcpy(buf + size, one_line, len);
	53	}
	54
	55	static int prepend_integer(char *buffer, unsigned val, int i)
	56	{
	57	buffer[--i] = '\0';
	58	do {
	59	buffer[--i] = '0' + (val % 10);
	60	val /= 10;
	61	} while (val);
	62	return i;
	63	}
	64
	65	static void finish_buffer(char tag, char bufp, unsigned int sizep)
	66	{
	67	int taglen;
	68	int offset;
	69	char buf = bufp;
	70	unsigned int size = *sizep;
	71
	72	offset = prepend_integer(buf, size - ORIG_OFFSET, ORIG_OFFSET);
	73	taglen = strlen(tag);
	74	offset -= taglen;
	75	buf += offset;
	76	size -= offset;
	77	memcpy(buf, tag, taglen);
	78
	79	*bufp = buf;
	80	*sizep = size;
	81	}
	82
	83	static void remove_special(char *p)
	84	{
	85	char c;
	86	char *dst = p;
	87
	88	for (;;) {
	89	c = *p;
	90	p++;
	91	switch(c) {
	92	case '\n': case '<': case '>':
	93	continue;
	94	}
	95	*dst++ = c;
	96	if (!c)
	97	break;
	98	}
	99	}
	100
27de946d DW	101	static const char *month_names[] = {
	102	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	103	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	104	};
	105
	106	static const char *weekday_names[] = {
	107	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	108	};
	109
	110
	111	static char skipfws(char str)
	112	{
	113	while (isspace(*str))
	114	str++;
	115	return str;
	116	}
	117
	118
	119	/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
	120	(i.e. English) day/month names, and it doesn't work correctly with %z. */
	121	static void parse_rfc2822_date(char date, char result, int maxlen)
	122	{
	123	struct tm tm;
	124	char *p;
	125	int i, offset;
	126	time_t then;
	127
	128	memset(&tm, 0, sizeof(tm));
	129
	130	/* Skip day-name */
	131	p = skipfws(date);
	132	if (!isdigit(*p)) {
	133	for (i=0; i<7; i++) {
	134	if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
	135	p = skipfws(p+4);
	136	goto day;
	137	}
	138	}
	139	return;
	140	}
	141
	142	/* day */
	143	day:
	144	tm.tm_mday = strtoul(p, &p, 10);
	145
	146	if (tm.tm_mday < 1 \|\| tm.tm_mday > 31)
	147	return;
	148
	149	if (!isspace(*p))
	150	return;
	151
	152	p = skipfws(p);
	153
	154	/* month */
	155
	156	for (i=0; i<12; i++) {
	157	if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
	158	tm.tm_mon = i;
	159	p = skipfws(p+strlen(month_names[i]));
	160	goto year;
	161	}
	162	}
	163	return; /* Error -- bad month */
	164
165	/* year */
166	year:
167	tm.tm_year = strtoul(p, &p, 10);
168
169	if (!tm.tm_year && !isspace(*p))
170	return;
171
172	if (tm.tm_year > 1900)
173	tm.tm_year -= 1900;
174
175	p=skipfws(p);
176
177	/* hour */
178	if (!isdigit(*p))
179	return;
180	tm.tm_hour = strtoul(p, &p, 10);
181
182	if (!tm.tm_hour > 23)
183	return;
184
185	if (*p != ':')
186	return; /* Error -- bad time */
187	p++;
188
189	/* minute */
190	if (!isdigit(*p))
191	return;
192	tm.tm_min = strtoul(p, &p, 10);
193
194	if (!tm.tm_min > 59)
195	return;
196
197	if (isspace(*p))
198	goto zone;
199
200	if (*p != ':')
201	return; /* Error -- bad time */
202	p++;
203
204	/* second */
205	if (!isdigit(*p))
206	return;
207	tm.tm_sec = strtoul(p, &p, 10);
208
209	if (!tm.tm_sec > 59)
210	return;
211
212	if (!isspace(*p))
213	return;
214
215	zone:
216	p = skipfws(p);
217
218	if (*p == '-')
219	offset = -60;
220	else if (*p == '+')
221	offset = 60;
222	else
223	return;
224
225	if (!isdigit(p[1]) \|\| !isdigit(p[2]) \|\| !isdigit(p[3]) \|\| !isdigit(p[4]))
226	return;
227
228	i = strtoul(p+1, NULL, 10);
229	offset = ((i % 100) + ((i / 100) 60));
230
231	if (*(skipfws(p + 5)))
232	return;
233
234	then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
235	if (then == -1)
236	return;
237
238	then -= offset;
239
240	snprintf(result, maxlen, "%lu %5.5s", then, p);
241	}
242
d0d7cbe7 LT	243	static void check_valid(unsigned char sha1, const char expect)
	244	{
	245	void *buf;
	246	char type[20];
	247	unsigned long size;
	248
	249	buf = read_sha1_file(sha1, type, &size);
	250	if (!buf \|\| strcmp(type, expect))
	251	die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
	252	free(buf);
	253	}
	254
e83c5163 LT	255	/*
	256	* Having more than two parents may be strange, but hey, there's
	257	* no conceptual reason why the file format couldn't accept multi-way
	258	* merges. It might be the "union" of several packages, for example.
	259	*
	260	* I don't really expect that to happen, but this is here to make
	261	* it clear that _conceptually_ it's ok..
	262	*/
	263	#define MAXPARENT (16)
	264
	265	int main(int argc, char **argv)
	266	{
	267	int i, len;
	268	int parents = 0;
	269	unsigned char tree_sha1[20];
	270	unsigned char parent_sha1[MAXPARENT][20];
d6d3f9d0	271	unsigned char commit_sha1[20];
e83c5163 LT	272	char gecos, realgecos;
e83c5163 LT	273	char *email, realemail[1000];
27de946d DW	274	char date[20], realdate[20];
27de946d DW	275	char *audate;
e83c5163 LT	276	char comment[1000];
	277	struct passwd *pw;
	278	time_t now;
27de946d	279	struct tm *tm;
e83c5163 LT	280	char *buffer;
	281	unsigned int size;
	282
	283	if (argc < 2 \|\| get_sha1_hex(argv[1], tree_sha1) < 0)
	284	usage("commit-tree <sha1> [-p <sha1>]* < changelog");
	285
d0d7cbe7	286	check_valid(tree_sha1, "tree");
e83c5163 LT	287	for (i = 2; i < argc; i += 2) {
	288	char a, b;
	289	a = argv[i]; b = argv[i+1];
	290	if (!b \|\| strcmp(a, "-p") \|\| get_sha1_hex(b, parent_sha1[parents]))
	291	usage("commit-tree <sha1> [-p <sha1>]* < changelog");
d0d7cbe7	292	check_valid(parent_sha1[parents], "commit");
e83c5163 LT	293	parents++;
	294	}
	295	if (!parents)
	296	fprintf(stderr, "Committing initial tree %s\n", argv[1]);
	297	pw = getpwuid(getuid());
	298	if (!pw)
2de381f9	299	die("You don't exist. Go away!");
e83c5163 LT	300	realgecos = pw->pw_gecos;
	301	len = strlen(pw->pw_name);
	302	memcpy(realemail, pw->pw_name, len);
	303	realemail[len] = '@';
	304	gethostname(realemail+len+1, sizeof(realemail)-len-1);
	305	time(&now);
27de946d DW	306	tm = localtime(&now);
	307
	308	strftime(realdate, sizeof(realdate), "%s %z", tm);
	309	strcpy(date, realdate);
e83c5163	310
bf16c71e LT	311	gecos = getenv("AUTHOR_NAME") ? : realgecos;
bf16c71e LT	312	email = getenv("AUTHOR_EMAIL") ? : realemail;
27de946d DW	313	audate = getenv("AUTHOR_DATE");
	314	if (audate)
	315	parse_rfc2822_date(audate, date, sizeof(date));
e83c5163 LT	316
	317	remove_special(gecos); remove_special(realgecos);
	318	remove_special(email); remove_special(realemail);
e83c5163 LT	319
	320	init_buffer(&buffer, &size);
	321	add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
	322
	323	/*
	324	* NOTE! This ordering means that the same exact tree merged with a
	325	* different order of parents will be a _different_ changeset even
	326	* if everything else stays the same.
	327	*/
	328	for (i = 0; i < parents; i++)
	329	add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
	330
	331	/* Person/date information */
	332	add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
	333	add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", realgecos, realemail, realdate);
	334
	335	/* And add the comment */
	336	while (fgets(comment, sizeof(comment), stdin) != NULL)
	337	add_buffer(&buffer, &size, "%s", comment);
	338
	339	finish_buffer("commit ", &buffer, &size);
	340
d6d3f9d0 LT	341	write_sha1_file(buffer, size, commit_sha1);
d6d3f9d0 LT	342	printf("%s\n", sha1_to_hex(commit_sha1));
e83c5163 LT	343	return 0;
e83c5163 LT	344	}