[PATCH] Move git_author_info and git_commiter_info to ident.c
[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>
11#include <time.h>
12#include <ctype.h>
13
14static char real_email[1000];
15static char real_name[1000];
16static char real_date[50];
17
18int setup_ident(void)
19{
20 int len;
21 struct passwd *pw = getpwuid(getuid());
22
23 if (!pw)
24 die("You don't exist. Go away!");
25
26 /* Get the name ("gecos") */
27 len = strlen(pw->pw_gecos);
28 if (len >= sizeof(real_name))
29 die("Your parents must have hated you");
30 memcpy(real_name, pw->pw_gecos, len+1);
31
32 /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
33 len = strlen(pw->pw_name);
34 if (len > sizeof(real_email)/2)
35 die("Your parents must have hated you");
36 memcpy(real_email, pw->pw_name, len);
37 real_email[len++] = '@';
38 gethostname(real_email + len, sizeof(real_email) - len);
39 if (!strchr(real_email+len, '.')) {
40 len = strlen(real_email);
41 real_email[len++] = '.';
42 getdomainname(real_email+len, sizeof(real_email)-len);
43 }
44
45 /* And set the default date */
46 datestamp(real_date, sizeof(real_date));
47 return 0;
48}
49
50static int add_raw(char *buf, int size, int offset, const char *str)
51{
52 int len = strlen(str);
53 if (offset + len > size)
54 return size;
55 memcpy(buf + offset, str, len);
56 return offset + len;
57}
58
59static int crud(unsigned char c)
60{
61 static const char crud_array[256] = {
62 [0 ... 31] = 1,
63 [' '] = 1,
64 ['.'] = 1, [','] = 1,
65 [':'] = 1, [';'] = 1,
66 ['<'] = 1, ['>'] = 1,
67 ['"'] = 1, ['\''] = 1,
68 };
69 return crud_array[c];
70}
71
72/*
73 * Copy over a string to the destination, but avoid special
74 * characters ('\n', '<' and '>') and remove crud at the end
75 */
76static int copy(char *buf, int size, int offset, const char *src)
77{
78 int i, len;
79 unsigned char c;
80
81 /* Remove crud from the beginning.. */
82 while ((c = *src) != 0) {
83 if (!crud(c))
84 break;
85 src++;
86 }
87
88 /* Remove crud from the end.. */
89 len = strlen(src);
90 while (len > 0) {
91 c = src[len-1];
92 if (!crud(c))
93 break;
94 --len;
95 }
96
97 /*
98 * Copy the rest to the buffer, but avoid the special
99 * characters '\n' '<' and '>' that act as delimeters on
100 * a identification line
101 */
102 for (i = 0; i < len; i++) {
103 c = *src++;
104 switch (c) {
105 case '\n': case '<': case '>':
106 continue;
107 }
108 if (offset >= size)
109 return size;
110 buf[offset++] = c;
111 }
112 return offset;
113}
114
115char *get_ident(const char *name, const char *email, const char *date_str)
116{
117 static char buffer[1000];
118 char date[50];
119 int i;
120
121 if (!name)
122 name = real_name;
123 if (!email)
124 email = real_email;
125 strcpy(date, real_date);
126 if (date_str)
127 parse_date(date_str, date, sizeof(date));
128
129 i = copy(buffer, sizeof(buffer), 0, name);
130 i = add_raw(buffer, sizeof(buffer), i, " <");
131 i = copy(buffer, sizeof(buffer), i, email);
132 i = add_raw(buffer, sizeof(buffer), i, "> ");
133 i = copy(buffer, sizeof(buffer), i, date);
134 if (i >= sizeof(buffer))
135 die("Impossibly long personal identifier");
136 buffer[i] = 0;
137 return buffer;
138}
d289d136
EB
139
140char *git_author_info(void)
141{
142 return get_ident(gitenv("GIT_AUTHOR_NAME"), gitenv("GIT_AUTHOR_EMAIL"), gitenv("GIT_AUTHOR_DATE"));
143}
144
145char *git_committer_info(void)
146{
147 return get_ident(gitenv("GIT_COMMITTER_NAME"), gitenv("GIT_COMMITTER_EMAIL"), gitenv("GIT_COMMITTER_DATE"));
148}