Add support for "local" packing
[git.git] / ident.c
blob7a9f5672ebfa0d3fc4ba72b7b90273b11aeebee4
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 #include <pwd.h>
11 #include <time.h>
12 #include <ctype.h>
14 static char git_default_date[50];
16 static void copy_gecos(struct passwd *w, char *name, int sz)
18 char *src, *dst;
19 int len, nlen;
21 nlen = strlen(w->pw_name);
23 /* Traditionally GECOS field had office phone numbers etc, separated
24 * with commas. Also & stands for capitalized form of the login name.
27 for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) {
28 int ch = *src;
29 if (ch != '&') {
30 *dst++ = ch;
31 if (ch == 0 || ch == ',')
32 break;
33 len++;
34 continue;
36 if (len + nlen < sz) {
37 /* Sorry, Mr. McDonald... */
38 *dst++ = toupper(*w->pw_name);
39 memcpy(dst, w->pw_name + 1, nlen - 1);
40 dst += nlen - 1;
43 if (len < sz)
44 name[len] = 0;
45 else
46 die("Your parents must have hated you!");
50 int setup_ident(void)
52 int len;
53 struct passwd *pw = getpwuid(getuid());
55 if (!pw)
56 die("You don't exist. Go away!");
58 /* Get the name ("gecos") */
59 copy_gecos(pw, git_default_name, sizeof(git_default_name));
61 /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
62 len = strlen(pw->pw_name);
63 if (len > sizeof(git_default_email)/2)
64 die("Your sysadmin must hate you!");
65 memcpy(git_default_email, pw->pw_name, len);
66 git_default_email[len++] = '@';
67 gethostname(git_default_email + len, sizeof(git_default_email) - len);
68 if (!strchr(git_default_email+len, '.')) {
69 len = strlen(git_default_email);
70 git_default_email[len++] = '.';
71 getdomainname(git_default_email+len, sizeof(git_default_email)-len);
73 /* And set the default date */
74 datestamp(git_default_date, sizeof(git_default_date));
75 return 0;
78 static int add_raw(char *buf, int size, int offset, const char *str)
80 int len = strlen(str);
81 if (offset + len > size)
82 return size;
83 memcpy(buf + offset, str, len);
84 return offset + len;
87 static int crud(unsigned char c)
89 static char crud_array[256];
90 static int crud_array_initialized = 0;
92 if (!crud_array_initialized) {
93 int k;
95 for (k = 0; k <= 31; ++k) crud_array[k] = 1;
96 crud_array[' '] = 1;
97 crud_array['.'] = 1;
98 crud_array[','] = 1;
99 crud_array[':'] = 1;
100 crud_array[';'] = 1;
101 crud_array['<'] = 1;
102 crud_array['>'] = 1;
103 crud_array['"'] = 1;
104 crud_array['\''] = 1;
105 crud_array_initialized = 1;
107 return crud_array[c];
111 * Copy over a string to the destination, but avoid special
112 * characters ('\n', '<' and '>') and remove crud at the end
114 static int copy(char *buf, int size, int offset, const char *src)
116 int i, len;
117 unsigned char c;
119 /* Remove crud from the beginning.. */
120 while ((c = *src) != 0) {
121 if (!crud(c))
122 break;
123 src++;
126 /* Remove crud from the end.. */
127 len = strlen(src);
128 while (len > 0) {
129 c = src[len-1];
130 if (!crud(c))
131 break;
132 --len;
136 * Copy the rest to the buffer, but avoid the special
137 * characters '\n' '<' and '>' that act as delimeters on
138 * a identification line
140 for (i = 0; i < len; i++) {
141 c = *src++;
142 switch (c) {
143 case '\n': case '<': case '>':
144 continue;
146 if (offset >= size)
147 return size;
148 buf[offset++] = c;
150 return offset;
153 char *get_ident(const char *name, const char *email, const char *date_str)
155 static char buffer[1000];
156 char date[50];
157 int i;
159 if (!name)
160 name = git_default_name;
161 if (!email)
162 email = git_default_email;
163 strcpy(date, git_default_date);
164 if (date_str)
165 parse_date(date_str, date, sizeof(date));
167 i = copy(buffer, sizeof(buffer), 0, name);
168 i = add_raw(buffer, sizeof(buffer), i, " <");
169 i = copy(buffer, sizeof(buffer), i, email);
170 i = add_raw(buffer, sizeof(buffer), i, "> ");
171 i = copy(buffer, sizeof(buffer), i, date);
172 if (i >= sizeof(buffer))
173 die("Impossibly long personal identifier");
174 buffer[i] = 0;
175 return buffer;
178 char *git_author_info(void)
180 return get_ident(getenv("GIT_AUTHOR_NAME"), getenv("GIT_AUTHOR_EMAIL"), getenv("GIT_AUTHOR_DATE"));
183 char *git_committer_info(void)
185 return get_ident(getenv("GIT_COMMITTER_NAME"), getenv("GIT_COMMITTER_EMAIL"), getenv("GIT_COMMITTER_DATE"));