2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
14 #define BLOCKING (1ul << 14)
15 #define ORIG_OFFSET (40)
18 * Leave space at the beginning to insert the tag
19 * once we know how big things are.
21 * FIXME! Share the code with "write-tree.c"
23 static void init_buffer(char **bufp, unsigned int *sizep)
25 char *buf = malloc(BLOCKING);
26 memset(buf, 0, ORIG_OFFSET);
31 static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
36 unsigned long alloc, size, newsize;
40 len = vsnprintf(one_line, sizeof(one_line), fmt, args);
44 alloc = (size + 32767) & ~32767;
46 if (newsize > alloc) {
47 alloc = (newsize + 32767) & ~32767;
48 buf = realloc(buf, alloc);
52 memcpy(buf + size, one_line, len);
55 static int prepend_integer(char *buffer, unsigned val, int i)
59 buffer[--i] = '0' + (val % 10);
65 static void finish_buffer(char *tag, char **bufp, unsigned int *sizep)
70 unsigned int size = *sizep;
72 offset = prepend_integer(buf, size - ORIG_OFFSET, ORIG_OFFSET);
77 memcpy(buf, tag, taglen);
83 static void remove_special(char *p)
92 case '\n': case '<': case '>':
101 static const char *month_names[] = {
102 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
103 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
106 static const char *weekday_names[] = {
107 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
111 static char *skipfws(char *str)
113 while (isspace(*str))
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)
128 memset(&tm, 0, sizeof(tm));
133 for (i=0; i<7; i++) {
134 if (!strncmp(p,weekday_names[i],3) && p[3] == ',') {
144 tm.tm_mday = strtoul(p, &p, 10);
146 if (tm.tm_mday < 1 || tm.tm_mday > 31)
156 for (i=0; i<12; i++) {
157 if (!strncmp(p, month_names[i], 3) && isspace(p[3])) {
159 p = skipfws(p+strlen(month_names[i]));
163 return; /* Error -- bad month */
167 tm.tm_year = strtoul(p, &p, 10);
169 if (!tm.tm_year && !isspace(*p))
172 if (tm.tm_year > 1900)
180 tm.tm_hour = strtoul(p, &p, 10);
182 if (!tm.tm_hour > 23)
186 return; /* Error -- bad time */
192 tm.tm_min = strtoul(p, &p, 10);
201 return; /* Error -- bad time */
207 tm.tm_sec = strtoul(p, &p, 10);
225 if (!isdigit(p[1]) || !isdigit(p[2]) || !isdigit(p[3]) || !isdigit(p[4]))
228 i = strtoul(p+1, NULL, 10);
229 offset *= ((i % 100) + ((i / 100) * 60));
231 if (*(skipfws(p + 5)))
234 then = mktime(&tm); /* mktime appears to ignore the GMT offset, stupidly */
240 snprintf(result, maxlen, "%lu %5.5s", then, p);
244 * Having more than two parents may be strange, but hey, there's
245 * no conceptual reason why the file format couldn't accept multi-way
246 * merges. It might be the "union" of several packages, for example.
248 * I don't really expect that to happen, but this is here to make
249 * it clear that _conceptually_ it's ok..
251 #define MAXPARENT (16)
253 int main(int argc, char **argv)
257 unsigned char tree_sha1[20];
258 unsigned char parent_sha1[MAXPARENT][20];
259 unsigned char commit_sha1[20];
260 char *gecos, *realgecos;
261 char *email, realemail[1000];
262 char date[20], realdate[20];
271 if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
272 usage("commit-tree <sha1> [-p <sha1>]* < changelog");
274 for (i = 2; i < argc; i += 2) {
276 a = argv[i]; b = argv[i+1];
277 if (!b || strcmp(a, "-p") || get_sha1_hex(b, parent_sha1[parents]))
278 usage("commit-tree <sha1> [-p <sha1>]* < changelog");
282 fprintf(stderr, "Committing initial tree %s\n", argv[1]);
283 pw = getpwuid(getuid());
285 die("You don't exist. Go away!");
286 realgecos = pw->pw_gecos;
287 len = strlen(pw->pw_name);
288 memcpy(realemail, pw->pw_name, len);
289 realemail[len] = '@';
290 gethostname(realemail+len+1, sizeof(realemail)-len-1);
292 tm = localtime(&now);
294 strftime(realdate, sizeof(realdate), "%s %z", tm);
295 strcpy(date, realdate);
297 gecos = getenv("AUTHOR_NAME") ? : realgecos;
298 email = getenv("AUTHOR_EMAIL") ? : realemail;
299 audate = getenv("AUTHOR_DATE");
301 parse_rfc2822_date(audate, date, sizeof(date));
303 remove_special(gecos); remove_special(realgecos);
304 remove_special(email); remove_special(realemail);
306 init_buffer(&buffer, &size);
307 add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
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.
314 for (i = 0; i < parents; i++)
315 add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
317 /* Person/date information */
318 add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
319 add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", realgecos, realemail, realdate);
321 /* And add the comment */
322 while (fgets(comment, sizeof(comment), stdin) != NULL)
323 add_buffer(&buffer, &size, "%s", comment);
325 finish_buffer("commit ", &buffer, &size);
327 write_sha1_file(buffer, size, commit_sha1);
328 printf("%s\n", sha1_to_hex(commit_sha1));