4 * create git identifier lines of the form "name <email> date"
6 * Copyright (C) 2005 Linus Torvalds
10 static struct strbuf git_default_name = STRBUF_INIT;
11 static struct strbuf git_default_email = STRBUF_INIT;
12 static char git_default_date[50];
14 #define IDENT_NAME_GIVEN 01
15 #define IDENT_MAIL_GIVEN 02
16 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
17 static int committer_ident_explicitly_given;
18 static int author_ident_explicitly_given;
20 #ifdef NO_GECOS_IN_PWENT
21 #define get_gecos(ignored) "&"
23 #define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
26 static void copy_gecos(const struct passwd *w, struct strbuf *name)
30 /* Traditionally GECOS field had office phone numbers etc, separated
31 * with commas. Also & stands for capitalized form of the login name.
34 for (src = get_gecos(w); *src && *src != ','; src++) {
37 strbuf_addch(name, ch);
39 /* Sorry, Mr. McDonald... */
40 strbuf_addch(name, toupper(*w->pw_name));
41 strbuf_addstr(name, w->pw_name + 1);
46 static int add_mailname_host(struct strbuf *buf)
49 struct strbuf mailnamebuf = STRBUF_INIT;
51 mailname = fopen("/etc/mailname", "r");
54 warning("cannot open /etc/mailname: %s",
58 if (strbuf_getline(&mailnamebuf, mailname, '\n') == EOF) {
60 warning("cannot read /etc/mailname: %s",
62 strbuf_release(&mailnamebuf);
67 strbuf_addbuf(buf, &mailnamebuf);
68 strbuf_release(&mailnamebuf);
73 static void add_domainname(struct strbuf *out)
78 if (gethostname(buf, sizeof(buf))) {
79 warning("cannot get host name: %s", strerror(errno));
80 strbuf_addstr(out, "(none)");
84 strbuf_addstr(out, buf);
85 else if ((he = gethostbyname(buf)) && strchr(he->h_name, '.'))
86 strbuf_addstr(out, he->h_name);
88 strbuf_addf(out, "%s.(none)", buf);
91 static void copy_email(const struct passwd *pw, struct strbuf *email)
94 * Make up a fake email address
95 * (name + '@' + hostname [+ '.' + domainname])
97 strbuf_addstr(email, pw->pw_name);
98 strbuf_addch(email, '@');
100 if (!add_mailname_host(email))
101 return; /* read from "/etc/mailname" (Debian) */
102 add_domainname(email);
105 static const char *ident_default_name(void)
107 if (!git_default_name.len) {
108 copy_gecos(xgetpwuid_self(), &git_default_name);
109 strbuf_trim(&git_default_name);
111 return git_default_name.buf;
114 const char *ident_default_email(void)
116 if (!git_default_email.len) {
117 const char *email = getenv("EMAIL");
119 if (email && email[0]) {
120 strbuf_addstr(&git_default_email, email);
121 committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
122 author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
124 copy_email(xgetpwuid_self(), &git_default_email);
125 strbuf_trim(&git_default_email);
127 return git_default_email.buf;
130 static const char *ident_default_date(void)
132 if (!git_default_date[0])
133 datestamp(git_default_date, sizeof(git_default_date));
134 return git_default_date;
137 static int crud(unsigned char c)
152 * Copy over a string to the destination, but avoid special
153 * characters ('\n', '<' and '>') and remove crud at the end
155 static void strbuf_addstr_without_crud(struct strbuf *sb, const char *src)
160 /* Remove crud from the beginning.. */
161 while ((c = *src) != 0) {
167 /* Remove crud from the end.. */
177 * Copy the rest to the buffer, but avoid the special
178 * characters '\n' '<' and '>' that act as delimiters on
179 * an identification line. We can only remove crud, never add it,
180 * so 'len' is our maximum.
182 strbuf_grow(sb, len);
183 for (i = 0; i < len; i++) {
186 case '\n': case '<': case '>':
189 sb->buf[sb->len++] = c;
191 sb->buf[sb->len] = '\0';
195 * Reverse of fmt_ident(); given an ident line, split the fields
196 * to allow the caller to parse it.
197 * Signal a success by returning 0, but date/tz fields of the result
198 * can still be NULL if the input line only has the name/email part
199 * (e.g. reading from a reflog entry).
201 int split_ident_line(struct ident_split *split, const char *line, int len)
207 memset(split, 0, sizeof(*split));
209 split->name_begin = line;
210 for (cp = line; *cp && cp < line + len; cp++)
212 split->mail_begin = cp + 1;
215 if (!split->mail_begin)
218 for (cp = split->mail_begin - 2; line <= cp; cp--)
220 split->name_end = cp + 1;
223 if (!split->name_end) {
224 /* no human readable name */
225 split->name_end = split->name_begin;
228 for (cp = split->mail_begin; cp < line + len; cp++)
230 split->mail_end = cp;
233 if (!split->mail_end)
237 * Look from the end-of-line to find the trailing ">" of the mail
238 * address, even though we should already know it as split->mail_end.
239 * This can help in cases of broken idents with an extra ">" somewhere
240 * in the email address. Note that we are assuming the timestamp will
241 * never have a ">" in it.
243 * Note that we will always find some ">" before going off the front of
244 * the string, because will always hit the split->mail_end closing
247 for (cp = line + len - 1; *cp != '>'; cp--)
250 for (cp = cp + 1; cp < line + len && isspace(*cp); cp++)
252 if (line + len <= cp)
254 split->date_begin = cp;
255 span = strspn(cp, "0123456789");
258 split->date_end = split->date_begin + span;
259 for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
261 if (line + len <= cp || (*cp != '+' && *cp != '-'))
263 split->tz_begin = cp;
264 span = strspn(cp + 1, "0123456789");
267 split->tz_end = split->tz_begin + 1 + span;
271 split->date_begin = NULL;
272 split->date_end = NULL;
273 split->tz_begin = NULL;
274 split->tz_end = NULL;
278 static const char *env_hint =
280 "*** Please tell me who you are.\n"
284 " git config --global user.email \"you@example.com\"\n"
285 " git config --global user.name \"Your Name\"\n"
287 "to set your account\'s default identity.\n"
288 "Omit --global to set the identity only in this repository.\n"
291 const char *fmt_ident(const char *name, const char *email,
292 const char *date_str, int flag)
294 static struct strbuf ident = STRBUF_INIT;
296 int strict = (flag & IDENT_STRICT);
297 int want_date = !(flag & IDENT_NO_DATE);
298 int want_name = !(flag & IDENT_NO_NAME);
300 if (want_name && !name)
301 name = ident_default_name();
303 email = ident_default_email();
305 if (want_name && !*name) {
309 if (name == git_default_name.buf)
310 fputs(env_hint, stderr);
311 die("empty ident name (for <%s>) not allowed", email);
313 pw = xgetpwuid_self();
317 if (strict && email == git_default_email.buf &&
318 strstr(email, "(none)")) {
319 fputs(env_hint, stderr);
320 die("unable to auto-detect email address (got '%s')", email);
324 if (date_str && date_str[0]) {
325 if (parse_date(date_str, date, sizeof(date)) < 0)
326 die("invalid date format: %s", date_str);
329 strcpy(date, ident_default_date());
332 strbuf_reset(&ident);
334 strbuf_addstr_without_crud(&ident, name);
335 strbuf_addstr(&ident, " <");
337 strbuf_addstr_without_crud(&ident, email);
339 strbuf_addch(&ident, '>');
341 strbuf_addch(&ident, ' ');
342 strbuf_addstr_without_crud(&ident, date);
347 const char *fmt_name(const char *name, const char *email)
349 return fmt_ident(name, email, NULL, IDENT_STRICT | IDENT_NO_DATE);
352 const char *git_author_info(int flag)
354 if (getenv("GIT_AUTHOR_NAME"))
355 author_ident_explicitly_given |= IDENT_NAME_GIVEN;
356 if (getenv("GIT_AUTHOR_EMAIL"))
357 author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
358 return fmt_ident(getenv("GIT_AUTHOR_NAME"),
359 getenv("GIT_AUTHOR_EMAIL"),
360 getenv("GIT_AUTHOR_DATE"),
364 const char *git_committer_info(int flag)
366 if (getenv("GIT_COMMITTER_NAME"))
367 committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
368 if (getenv("GIT_COMMITTER_EMAIL"))
369 committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
370 return fmt_ident(getenv("GIT_COMMITTER_NAME"),
371 getenv("GIT_COMMITTER_EMAIL"),
372 getenv("GIT_COMMITTER_DATE"),
376 static int ident_is_sufficient(int user_ident_explicitly_given)
379 return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
381 return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
385 int committer_ident_sufficiently_given(void)
387 return ident_is_sufficient(committer_ident_explicitly_given);
390 int author_ident_sufficiently_given(void)
392 return ident_is_sufficient(author_ident_explicitly_given);
395 int git_ident_config(const char *var, const char *value, void *data)
397 if (!strcmp(var, "user.name")) {
399 return config_error_nonbool(var);
400 strbuf_reset(&git_default_name);
401 strbuf_addstr(&git_default_name, value);
402 committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
403 author_ident_explicitly_given |= IDENT_NAME_GIVEN;
407 if (!strcmp(var, "user.email")) {
409 return config_error_nonbool(var);
410 strbuf_reset(&git_default_email);
411 strbuf_addstr(&git_default_email, value);
412 committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
413 author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
420 static int buf_cmp(const char *a_begin, const char *a_end,
421 const char *b_begin, const char *b_end)
423 int a_len = a_end - a_begin;
424 int b_len = b_end - b_begin;
425 int min = a_len < b_len ? a_len : b_len;
428 cmp = memcmp(a_begin, b_begin, min);
432 return a_len - b_len;
435 int ident_cmp(const struct ident_split *a,
436 const struct ident_split *b)
440 cmp = buf_cmp(a->mail_begin, a->mail_end,
441 b->mail_begin, b->mail_end);
445 return buf_cmp(a->name_begin, a->name_end,
446 b->name_begin, b->name_end);