blame.c: Properly initialize strbuf after calling, textconv_object()
[git/dscho.git] / ident.c
blob9e2438826dfce158e04549933d5c588dd6abcf5c
1 /*
2 * ident.c
4 * create git identifier lines of the form "name <email> date"
6 * Copyright (C) 2005 Linus Torvalds
7 */
8 #include "cache.h"
10 static char git_default_date[50];
12 static void copy_gecos(const struct passwd *w, char *name, size_t sz)
14 char *src, *dst;
15 size_t len, nlen;
17 nlen = strlen(w->pw_name);
19 /* Traditionally GECOS field had office phone numbers etc, separated
20 * with commas. Also & stands for capitalized form of the login name.
23 for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) {
24 int ch = *src;
25 if (ch != '&') {
26 *dst++ = ch;
27 if (ch == 0 || ch == ',')
28 break;
29 len++;
30 continue;
32 if (len + nlen < sz) {
33 /* Sorry, Mr. McDonald... */
34 *dst++ = toupper(*w->pw_name);
35 memcpy(dst, w->pw_name + 1, nlen - 1);
36 dst += nlen - 1;
39 if (len < sz)
40 name[len] = 0;
41 else
42 die("Your parents must have hated you!");
46 static void copy_email(const struct passwd *pw)
49 * Make up a fake email address
50 * (name + '@' + hostname [+ '.' + domainname])
52 size_t len = strlen(pw->pw_name);
53 if (len > sizeof(git_default_email)/2)
54 die("Your sysadmin must hate you!");
55 memcpy(git_default_email, pw->pw_name, len);
56 git_default_email[len++] = '@';
57 gethostname(git_default_email + len, sizeof(git_default_email) - len);
58 if (!strchr(git_default_email+len, '.')) {
59 struct hostent *he = gethostbyname(git_default_email + len);
60 char *domainname;
62 len = strlen(git_default_email);
63 git_default_email[len++] = '.';
64 if (he && (domainname = strchr(he->h_name, '.')))
65 strlcpy(git_default_email + len, domainname + 1,
66 sizeof(git_default_email) - len);
67 else
68 strlcpy(git_default_email + len, "(none)",
69 sizeof(git_default_email) - len);
73 static void setup_ident(void)
75 struct passwd *pw = NULL;
77 /* Get the name ("gecos") */
78 if (!git_default_name[0]) {
79 pw = getpwuid(getuid());
80 if (!pw)
81 die("You don't exist. Go away!");
82 copy_gecos(pw, git_default_name, sizeof(git_default_name));
85 if (!git_default_email[0]) {
86 const char *email = getenv("EMAIL");
88 if (email && email[0]) {
89 strlcpy(git_default_email, email,
90 sizeof(git_default_email));
91 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
92 } else {
93 if (!pw)
94 pw = getpwuid(getuid());
95 if (!pw)
96 die("You don't exist. Go away!");
97 copy_email(pw);
101 /* And set the default date */
102 if (!git_default_date[0])
103 datestamp(git_default_date, sizeof(git_default_date));
106 static int add_raw(char *buf, size_t size, int offset, const char *str)
108 size_t len = strlen(str);
109 if (offset + len > size)
110 return size;
111 memcpy(buf + offset, str, len);
112 return offset + len;
115 static int crud(unsigned char c)
117 return c <= 32 ||
118 c == '.' ||
119 c == ',' ||
120 c == ':' ||
121 c == ';' ||
122 c == '<' ||
123 c == '>' ||
124 c == '"' ||
125 c == '\\' ||
126 c == '\'';
130 * Copy over a string to the destination, but avoid special
131 * characters ('\n', '<' and '>') and remove crud at the end
133 static int copy(char *buf, size_t size, int offset, const char *src)
135 size_t i, len;
136 unsigned char c;
138 /* Remove crud from the beginning.. */
139 while ((c = *src) != 0) {
140 if (!crud(c))
141 break;
142 src++;
145 /* Remove crud from the end.. */
146 len = strlen(src);
147 while (len > 0) {
148 c = src[len-1];
149 if (!crud(c))
150 break;
151 --len;
155 * Copy the rest to the buffer, but avoid the special
156 * characters '\n' '<' and '>' that act as delimiters on
157 * an identification line
159 for (i = 0; i < len; i++) {
160 c = *src++;
161 switch (c) {
162 case '\n': case '<': case '>':
163 continue;
165 if (offset >= size)
166 return size;
167 buf[offset++] = c;
169 return offset;
172 static const char *env_hint =
173 "\n"
174 "*** Please tell me who you are.\n"
175 "\n"
176 "Run\n"
177 "\n"
178 " git config --global user.email \"you@example.com\"\n"
179 " git config --global user.name \"Your Name\"\n"
180 "\n"
181 "to set your account\'s default identity.\n"
182 "Omit --global to set the identity only in this repository.\n"
183 "\n";
185 const char *fmt_ident(const char *name, const char *email,
186 const char *date_str, int flag)
188 static char buffer[1000];
189 char date[50];
190 int i;
191 int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME);
192 int warn_on_no_name = (flag & IDENT_WARN_ON_NO_NAME);
193 int name_addr_only = (flag & IDENT_NO_DATE);
195 setup_ident();
196 if (!name)
197 name = git_default_name;
198 if (!email)
199 email = git_default_email;
201 if (!*name) {
202 struct passwd *pw;
204 if ((warn_on_no_name || error_on_no_name) &&
205 name == git_default_name && env_hint) {
206 fputs(env_hint, stderr);
207 env_hint = NULL; /* warn only once */
209 if (error_on_no_name)
210 die("empty ident %s <%s> not allowed", name, email);
211 pw = getpwuid(getuid());
212 if (!pw)
213 die("You don't exist. Go away!");
214 strlcpy(git_default_name, pw->pw_name,
215 sizeof(git_default_name));
216 name = git_default_name;
219 strcpy(date, git_default_date);
220 if (!name_addr_only && date_str)
221 parse_date(date_str, date, sizeof(date));
223 i = copy(buffer, sizeof(buffer), 0, name);
224 i = add_raw(buffer, sizeof(buffer), i, " <");
225 i = copy(buffer, sizeof(buffer), i, email);
226 if (!name_addr_only) {
227 i = add_raw(buffer, sizeof(buffer), i, "> ");
228 i = copy(buffer, sizeof(buffer), i, date);
229 } else {
230 i = add_raw(buffer, sizeof(buffer), i, ">");
232 if (i >= sizeof(buffer))
233 die("Impossibly long personal identifier");
234 buffer[i] = 0;
235 return buffer;
238 const char *fmt_name(const char *name, const char *email)
240 return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE);
243 const char *git_author_info(int flag)
245 return fmt_ident(getenv("GIT_AUTHOR_NAME"),
246 getenv("GIT_AUTHOR_EMAIL"),
247 getenv("GIT_AUTHOR_DATE"),
248 flag);
251 const char *git_committer_info(int flag)
253 if (getenv("GIT_COMMITTER_NAME"))
254 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
255 if (getenv("GIT_COMMITTER_EMAIL"))
256 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
257 return fmt_ident(getenv("GIT_COMMITTER_NAME"),
258 getenv("GIT_COMMITTER_EMAIL"),
259 getenv("GIT_COMMITTER_DATE"),
260 flag);
263 int user_ident_sufficiently_given(void)
265 #ifndef WINDOWS
266 return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
267 #else
268 return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
269 #endif