Make git-cherry-pick in target "all"
[git/git.git] / ident.c
CommitLineData
6aa33f40
LT
1/*
2 * ident.c
3 *
4 * create git identifier lines of the form "name <email> date"
5 *
6 * Copyright (C) 2005 Linus Torvalds
7 */
8#include "cache.h"
9
10#include <pwd.h>
6aa33f40 11
e1b10391 12static char git_default_date[50];
6aa33f40 13
e9bacb4f
JH
14static void copy_gecos(struct passwd *w, char *name, int sz)
15{
16 char *src, *dst;
17 int len, nlen;
18
19 nlen = strlen(w->pw_name);
20
21 /* Traditionally GECOS field had office phone numbers etc, separated
22 * with commas. Also & stands for capitalized form of the login name.
23 */
24
25 for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) {
26 int ch = *src;
27 if (ch != '&') {
28 *dst++ = ch;
29 if (ch == 0 || ch == ',')
30 break;
31 len++;
32 continue;
33 }
34 if (len + nlen < sz) {
35 /* Sorry, Mr. McDonald... */
36 *dst++ = toupper(*w->pw_name);
37 memcpy(dst, w->pw_name + 1, nlen - 1);
38 dst += nlen - 1;
39 }
40 }
41 if (len < sz)
42 name[len] = 0;
43 else
44 die("Your parents must have hated you!");
45
46}
47
6aa33f40
LT
48int setup_ident(void)
49{
50 int len;
51 struct passwd *pw = getpwuid(getuid());
52
53 if (!pw)
54 die("You don't exist. Go away!");
55
56 /* Get the name ("gecos") */
e1b10391 57 copy_gecos(pw, git_default_name, sizeof(git_default_name));
6aa33f40
LT
58
59 /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
60 len = strlen(pw->pw_name);
e1b10391 61 if (len > sizeof(git_default_email)/2)
7a868a84 62 die("Your sysadmin must hate you!");
e1b10391
LT
63 memcpy(git_default_email, pw->pw_name, len);
64 git_default_email[len++] = '@';
65 gethostname(git_default_email + len, sizeof(git_default_email) - len);
66 if (!strchr(git_default_email+len, '.')) {
67 len = strlen(git_default_email);
68 git_default_email[len++] = '.';
69 getdomainname(git_default_email+len, sizeof(git_default_email)-len);
6aa33f40 70 }
6aa33f40 71 /* And set the default date */
e1b10391 72 datestamp(git_default_date, sizeof(git_default_date));
6aa33f40
LT
73 return 0;
74}
75
76static int add_raw(char *buf, int size, int offset, const char *str)
77{
78 int len = strlen(str);
79 if (offset + len > size)
80 return size;
81 memcpy(buf + offset, str, len);
82 return offset + len;
83}
84
85static int crud(unsigned char c)
86{
fb2af037
JR
87 static char crud_array[256];
88 static int crud_array_initialized = 0;
89
90 if (!crud_array_initialized) {
91 int k;
92
93 for (k = 0; k <= 31; ++k) crud_array[k] = 1;
94 crud_array[' '] = 1;
95 crud_array['.'] = 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_initialized = 1;
104 }
6aa33f40
LT
105 return crud_array[c];
106}
107
108/*
109 * Copy over a string to the destination, but avoid special
110 * characters ('\n', '<' and '>') and remove crud at the end
111 */
112static int copy(char *buf, int size, int offset, const char *src)
113{
114 int i, len;
115 unsigned char c;
116
117 /* Remove crud from the beginning.. */
118 while ((c = *src) != 0) {
119 if (!crud(c))
120 break;
121 src++;
122 }
123
124 /* Remove crud from the end.. */
125 len = strlen(src);
126 while (len > 0) {
127 c = src[len-1];
128 if (!crud(c))
129 break;
130 --len;
131 }
132
133 /*
134 * Copy the rest to the buffer, but avoid the special
135 * characters '\n' '<' and '>' that act as delimeters on
136 * a identification line
137 */
138 for (i = 0; i < len; i++) {
139 c = *src++;
140 switch (c) {
141 case '\n': case '<': case '>':
142 continue;
143 }
144 if (offset >= size)
145 return size;
146 buf[offset++] = c;
147 }
148 return offset;
149}
150
151char *get_ident(const char *name, const char *email, const char *date_str)
152{
153 static char buffer[1000];
154 char date[50];
155 int i;
156
157 if (!name)
e1b10391 158 name = git_default_name;
6aa33f40 159 if (!email)
e1b10391
LT
160 email = git_default_email;
161 strcpy(date, git_default_date);
6aa33f40
LT
162 if (date_str)
163 parse_date(date_str, date, sizeof(date));
164
165 i = copy(buffer, sizeof(buffer), 0, name);
166 i = add_raw(buffer, sizeof(buffer), i, " <");
167 i = copy(buffer, sizeof(buffer), i, email);
168 i = add_raw(buffer, sizeof(buffer), i, "> ");
169 i = copy(buffer, sizeof(buffer), i, date);
170 if (i >= sizeof(buffer))
171 die("Impossibly long personal identifier");
172 buffer[i] = 0;
173 return buffer;
174}
d289d136
EB
175
176char *git_author_info(void)
177{
a9ab586a 178 return get_ident(getenv("GIT_AUTHOR_NAME"), getenv("GIT_AUTHOR_EMAIL"), getenv("GIT_AUTHOR_DATE"));
d289d136
EB
179}
180
181char *git_committer_info(void)
182{
a9ab586a 183 return get_ident(getenv("GIT_COMMITTER_NAME"), getenv("GIT_COMMITTER_EMAIL"), getenv("GIT_COMMITTER_DATE"));
d289d136 184}