[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)

/*
 * FIXME! Share the code with "write-tree.c"
 */
static void init_buffer(char **bufp, unsigned int *sizep)
{
	char *buf = malloc(BLOCKING);
	*sizep = 0;
	*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 void remove_special(char *p)
{
	char c;
	char *dst = p, *src = p;

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

	/*
	 * Go back, and remove crud from the end: some people
	 * have commas etc in their gecos field
	 */
	dst--;
	while (--dst >= p) {
		unsigned char c = *dst;
		switch (c) {
		case ',': case ';': case '.':
			*dst = 0;
			continue;
		}
		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 is not strange at all, and this is
 * how multi-way merges are represented.
 */
#define MAXPARENT (16)

static char *commit_tree_usage = "commit-tree <sha1> [-p <sha1>]* < changelog";

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, *commitgecos;
	char *email, *commitemail, 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_usage);

	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_usage);
		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);
	if (!strchr(realemail+len+1, '.')) {
		strcat(realemail, ".");
		getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
	}
	time(&now);
	tm = localtime(&now);

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

	commitgecos = getenv("COMMIT_AUTHOR_NAME") ? : realgecos;
	commitemail = getenv("COMMIT_AUTHOR_EMAIL") ? : realemail;
	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(commitgecos);
	remove_special(email); remove_special(realemail); remove_special(commitemail);

	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", commitgecos, commitemail, realdate);

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

	write_sha1_file(buffer, size, "commit", 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
e83c5163 LT	14	#define BLOCKING (1ul << 14)
e83c5163 LT	15
e83c5163 LT	16	/*
e83c5163 LT	17	* FIXME! Share the code with "write-tree.c"
	18	*/
	19	static void init_buffer(char *bufp, unsigned int sizep)
	20	{
	21	char *buf = malloc(BLOCKING);
a44c9a5e	22	*sizep = 0;
e83c5163 LT	23	*bufp = buf;
	24	}
	25
	26	static void add_buffer(char *bufp, unsigned int sizep, const char *fmt, ...)
	27	{
	28	char one_line[2048];
	29	va_list args;
	30	int len;
	31	unsigned long alloc, size, newsize;
	32	char *buf;
	33
	34	va_start(args, fmt);
	35	len = vsnprintf(one_line, sizeof(one_line), fmt, args);
	36	va_end(args);
	37	size = *sizep;
	38	newsize = size + len;
	39	alloc = (size + 32767) & ~32767;
	40	buf = *bufp;
	41	if (newsize > alloc) {
aebb2679	42	alloc = (newsize + 32767) & ~32767;
e83c5163 LT	43	buf = realloc(buf, alloc);
	44	*bufp = buf;
	45	}
	46	*sizep = newsize;
	47	memcpy(buf + size, one_line, len);
	48	}
	49
e83c5163 LT	50	static void remove_special(char *p)
	51	{
	52	char c;
74b2428f	53	char dst = p, src = p;
e83c5163 LT	54
e83c5163 LT	55	for (;;) {
74b2428f BR	56	c = *src;
74b2428f BR	57	src++;
e83c5163 LT	58	switch(c) {
	59	case '\n': case '<': case '>':
	60	continue;
	61	}
	62	*dst++ = c;
	63	if (!c)
	64	break;
	65	}
5e5128ed LT	66
	67	/*
	68	* Go back, and remove crud from the end: some people
	69	* have commas etc in their gecos field
	70	*/
	71	dst--;
	72	while (--dst >= p) {
	73	unsigned char c = *dst;
	74	switch (c) {
	75	case ',': case ';': case '.':
	76	*dst = 0;
	77	continue;
	78	}
	79	break;
	80	}
e83c5163 LT	81	}
e83c5163 LT	82
27de946d DW	83	static const char *month_names[] = {
	84	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	85	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	86	};
	87
	88	static const char *weekday_names[] = {
	89	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	90	};
	91
	92
	93	static char skipfws(char str)
	94	{
	95	while (isspace(*str))
	96	str++;
	97	return str;
	98	}
	99
	100
	101	/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
	102	(i.e. English) day/month names, and it doesn't work correctly with %z. */
	103	static void parse_rfc2822_date(char date, char result, int maxlen)
	104	{
	105	struct tm tm;
	106	char *p;
	107	int i, offset;
	108	time_t then;
	109
	110	memset(&tm, 0, sizeof(tm));
	111
	112	/* Skip day-name */
	113	p = skipfws(date);
	114	if (!isdigit(*p)) {
	115	for (i=0; i<7; i++) {
	116	if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
	117	p = skipfws(p+4);
	118	goto day;
	119	}
	120	}
	121	return;
	122	}
	123
	124	/* day */
	125	day:
	126	tm.tm_mday = strtoul(p, &p, 10);
	127
	128	if (tm.tm_mday < 1 \|\| tm.tm_mday > 31)
	129	return;
	130
	131	if (!isspace(*p))
	132	return;
	133
	134	p = skipfws(p);
	135
	136	/* month */
	137
	138	for (i=0; i<12; i++) {
	139	if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
	140	tm.tm_mon = i;
	141	p = skipfws(p+strlen(month_names[i]));
	142	goto year;
	143	}
	144	}
	145	return; /* Error -- bad month */
	146
147	/* year */
148	year:
149	tm.tm_year = strtoul(p, &p, 10);
150
151	if (!tm.tm_year && !isspace(*p))
152	return;
153
154	if (tm.tm_year > 1900)
155	tm.tm_year -= 1900;
156
157	p=skipfws(p);
158
159	/* hour */
160	if (!isdigit(*p))
161	return;
162	tm.tm_hour = strtoul(p, &p, 10);
163
164	if (!tm.tm_hour > 23)
165	return;
166
167	if (*p != ':')
168	return; /* Error -- bad time */
169	p++;
170
171	/* minute */
172	if (!isdigit(*p))
173	return;
174	tm.tm_min = strtoul(p, &p, 10);
175
176	if (!tm.tm_min > 59)
177	return;
178
179	if (isspace(*p))
180	goto zone;
181
182	if (*p != ':')
183	return; /* Error -- bad time */
184	p++;
185
186	/* second */
187	if (!isdigit(*p))
188	return;
189	tm.tm_sec = strtoul(p, &p, 10);
190
191	if (!tm.tm_sec > 59)
192	return;
193
194	if (!isspace(*p))
195	return;
196
197	zone:
198	p = skipfws(p);
199
200	if (*p == '-')
201	offset = -60;
202	else if (*p == '+')
203	offset = 60;
204	else
205	return;
206
207	if (!isdigit(p[1]) \|\| !isdigit(p[2]) \|\| !isdigit(p[3]) \|\| !isdigit(p[4]))
208	return;
209
210	i = strtoul(p+1, NULL, 10);
211	offset = ((i % 100) + ((i / 100) 60));
212
213	if (*(skipfws(p + 5)))
214	return;
215
216	then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
217	if (then == -1)
218	return;
219
220	then -= offset;
221
222	snprintf(result, maxlen, "%lu %5.5s", then, p);
223	}
224
d0d7cbe7 LT	225	static void check_valid(unsigned char sha1, const char expect)
	226	{
	227	void *buf;
	228	char type[20];
	229	unsigned long size;
	230
	231	buf = read_sha1_file(sha1, type, &size);
	232	if (!buf \|\| strcmp(type, expect))
	233	die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
	234	free(buf);
	235	}
	236
e83c5163	237	/*
c5bac17a JH	238	* Having more than two parents is not strange at all, and this is
c5bac17a JH	239	* how multi-way merges are represented.
e83c5163 LT	240	*/
	241	#define MAXPARENT (16)
	242
c5bac17a JH	243	static char commit_tree_usage = "commit-tree <sha1> [-p <sha1>] < changelog";
c5bac17a JH	244
e83c5163 LT	245	int main(int argc, char **argv)
	246	{
	247	int i, len;
	248	int parents = 0;
	249	unsigned char tree_sha1[20];
	250	unsigned char parent_sha1[MAXPARENT][20];
d6d3f9d0	251	unsigned char commit_sha1[20];
b70070f0 GK	252	char gecos, realgecos, *commitgecos;
b70070f0 GK	253	char email, commitemail, realemail[1000];
27de946d DW	254	char date[20], realdate[20];
27de946d DW	255	char *audate;
e83c5163 LT	256	char comment[1000];
	257	struct passwd *pw;
	258	time_t now;
27de946d	259	struct tm *tm;
e83c5163 LT	260	char *buffer;
	261	unsigned int size;
	262
	263	if (argc < 2 \|\| get_sha1_hex(argv[1], tree_sha1) < 0)
c5bac17a	264	usage(commit_tree_usage);
e83c5163	265
d0d7cbe7	266	check_valid(tree_sha1, "tree");
e83c5163 LT	267	for (i = 2; i < argc; i += 2) {
	268	char a, b;
	269	a = argv[i]; b = argv[i+1];
	270	if (!b \|\| strcmp(a, "-p") \|\| get_sha1_hex(b, parent_sha1[parents]))
c5bac17a	271	usage(commit_tree_usage);
d0d7cbe7	272	check_valid(parent_sha1[parents], "commit");
e83c5163 LT	273	parents++;
	274	}
	275	if (!parents)
	276	fprintf(stderr, "Committing initial tree %s\n", argv[1]);
	277	pw = getpwuid(getuid());
	278	if (!pw)
2de381f9	279	die("You don't exist. Go away!");
e83c5163 LT	280	realgecos = pw->pw_gecos;
	281	len = strlen(pw->pw_name);
	282	memcpy(realemail, pw->pw_name, len);
	283	realemail[len] = '@';
	284	gethostname(realemail+len+1, sizeof(realemail)-len-1);
b96afa59 LT	285	if (!strchr(realemail+len+1, '.')) {
	286	strcat(realemail, ".");
	287	getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
	288	}
e83c5163	289	time(&now);
27de946d DW	290	tm = localtime(&now);
	291
	292	strftime(realdate, sizeof(realdate), "%s %z", tm);
	293	strcpy(date, realdate);
e83c5163	294
b70070f0 GK	295	commitgecos = getenv("COMMIT_AUTHOR_NAME") ? : realgecos;
b70070f0 GK	296	commitemail = getenv("COMMIT_AUTHOR_EMAIL") ? : realemail;
bf16c71e LT	297	gecos = getenv("AUTHOR_NAME") ? : realgecos;
bf16c71e LT	298	email = getenv("AUTHOR_EMAIL") ? : realemail;
27de946d DW	299	audate = getenv("AUTHOR_DATE");
	300	if (audate)
	301	parse_rfc2822_date(audate, date, sizeof(date));
e83c5163	302
b70070f0 GK	303	remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
b70070f0 GK	304	remove_special(email); remove_special(realemail); remove_special(commitemail);
e83c5163 LT	305
	306	init_buffer(&buffer, &size);
	307	add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
	308
	309	/*
	310	* NOTE! This ordering means that the same exact tree merged with a
	311	* different order of parents will be a _different_ changeset even
	312	* if everything else stays the same.
	313	*/
	314	for (i = 0; i < parents; i++)
	315	add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
	316
	317	/* Person/date information */
	318	add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
b70070f0	319	add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);
e83c5163 LT	320
	321	/* And add the comment */
	322	while (fgets(comment, sizeof(comment), stdin) != NULL)
	323	add_buffer(&buffer, &size, "%s", comment);
	324
a44c9a5e	325	write_sha1_file(buffer, size, "commit", commit_sha1);
d6d3f9d0	326	printf("%s\n", sha1_to_hex(commit_sha1));
e83c5163 LT	327	return 0;
e83c5163 LT	328	}