status: show branchname with a configurable color
[git/git.git] / color.c
CommitLineData
7c92fe0e 1#include "cache.h"
85023577 2#include "color.h"
7c92fe0e 3
6b2f2d98
MK
4int git_use_color_default = 0;
5
7c92fe0e
JK
6static int parse_color(const char *name, int len)
7{
8 static const char * const color_names[] = {
9 "normal", "black", "red", "green", "yellow",
10 "blue", "magenta", "cyan", "white"
11 };
12 char *end;
13 int i;
14 for (i = 0; i < ARRAY_SIZE(color_names); i++) {
15 const char *str = color_names[i];
16 if (!strncasecmp(name, str, len) && !str[len])
17 return i - 1;
18 }
19 i = strtol(name, &end, 10);
a0cf49c1 20 if (end - name == len && i >= -1 && i <= 255)
7c92fe0e
JK
21 return i;
22 return -2;
23}
24
25static int parse_attr(const char *name, int len)
26{
27 static const int attr_values[] = { 1, 2, 4, 5, 7 };
28 static const char * const attr_names[] = {
29 "bold", "dim", "ul", "blink", "reverse"
30 };
31 int i;
32 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
33 const char *str = attr_names[i];
34 if (!strncasecmp(name, str, len) && !str[len])
35 return attr_values[i];
36 }
37 return -1;
38}
39
40void color_parse(const char *value, const char *var, char *dst)
2c2dc7c8
RS
41{
42 color_parse_mem(value, strlen(value), var, dst);
43}
44
45void color_parse_mem(const char *value, int value_len, const char *var,
46 char *dst)
7c92fe0e
JK
47{
48 const char *ptr = value;
2c2dc7c8 49 int len = value_len;
8b124135 50 unsigned int attr = 0;
7c92fe0e
JK
51 int fg = -2;
52 int bg = -2;
53
2c2dc7c8 54 if (!strncasecmp(value, "reset", len)) {
dc6ebd4c 55 strcpy(dst, GIT_COLOR_RESET);
7c92fe0e
JK
56 return;
57 }
58
8b124135 59 /* [fg [bg]] [attr]... */
2c2dc7c8 60 while (len > 0) {
7c92fe0e 61 const char *word = ptr;
2c2dc7c8 62 int val, wordlen = 0;
7c92fe0e 63
2c2dc7c8
RS
64 while (len > 0 && !isspace(word[wordlen])) {
65 wordlen++;
66 len--;
67 }
7c92fe0e 68
2c2dc7c8
RS
69 ptr = word + wordlen;
70 while (len > 0 && isspace(*ptr)) {
7c92fe0e 71 ptr++;
2c2dc7c8
RS
72 len--;
73 }
7c92fe0e 74
2c2dc7c8 75 val = parse_color(word, wordlen);
7c92fe0e
JK
76 if (val >= -1) {
77 if (fg == -2) {
78 fg = val;
79 continue;
80 }
81 if (bg == -2) {
82 bg = val;
83 continue;
84 }
85 goto bad;
86 }
2c2dc7c8 87 val = parse_attr(word, wordlen);
8b124135
JH
88 if (0 <= val)
89 attr |= (1 << val);
90 else
7c92fe0e 91 goto bad;
7c92fe0e
JK
92 }
93
8b124135 94 if (attr || fg >= 0 || bg >= 0) {
7c92fe0e 95 int sep = 0;
8b124135 96 int i;
7c92fe0e
JK
97
98 *dst++ = '\033';
99 *dst++ = '[';
8b124135
JH
100
101 for (i = 0; attr; i++) {
102 unsigned bit = (1 << i);
103 if (!(attr & bit))
104 continue;
105 attr &= ~bit;
106 if (sep++)
107 *dst++ = ';';
108 *dst++ = '0' + i;
7c92fe0e
JK
109 }
110 if (fg >= 0) {
111 if (sep++)
112 *dst++ = ';';
113 if (fg < 8) {
114 *dst++ = '3';
115 *dst++ = '0' + fg;
116 } else {
117 dst += sprintf(dst, "38;5;%d", fg);
118 }
119 }
120 if (bg >= 0) {
121 if (sep++)
122 *dst++ = ';';
123 if (bg < 8) {
124 *dst++ = '4';
125 *dst++ = '0' + bg;
126 } else {
127 dst += sprintf(dst, "48;5;%d", bg);
128 }
129 }
130 *dst++ = 'm';
131 }
132 *dst = 0;
133 return;
134bad:
2c2dc7c8 135 die("bad color value '%.*s' for variable '%s'", value_len, value, var);
7c92fe0e
JK
136}
137
0f6f5a40 138int git_config_colorbool(const char *var, const char *value, int stdout_is_tty)
7c92fe0e 139{
57f2b842
JH
140 if (value) {
141 if (!strcasecmp(value, "never"))
142 return 0;
143 if (!strcasecmp(value, "always"))
144 return 1;
145 if (!strcasecmp(value, "auto"))
146 goto auto_color;
7c92fe0e 147 }
57f2b842 148
73e9da01
ML
149 if (!var)
150 return -1;
151
57f2b842
JH
152 /* Missing or explicit false to turn off colorization */
153 if (!git_config_bool(var, value))
7c92fe0e 154 return 0;
57f2b842
JH
155
156 /* any normal truth value defaults to 'auto' */
157 auto_color:
0f6f5a40
JH
158 if (stdout_is_tty < 0)
159 stdout_is_tty = isatty(1);
6e9af863 160 if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
57f2b842
JH
161 char *term = getenv("TERM");
162 if (term && strcmp(term, "dumb"))
163 return 1;
164 }
165 return 0;
7c92fe0e
JK
166}
167
ef90d6d4 168int git_color_default_config(const char *var, const char *value, void *cb)
6b2f2d98
MK
169{
170 if (!strcmp(var, "color.ui")) {
171 git_use_color_default = git_config_colorbool(var, value, -1);
172 return 0;
173 }
174
ef90d6d4 175 return git_default_config(var, value, cb);
6b2f2d98
MK
176}
177
f26a0012 178static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
7c92fe0e
JK
179 va_list args, const char *trail)
180{
181 int r = 0;
182
183 if (*color)
f26a0012
KH
184 r += fprintf(fp, "%s", color);
185 r += vfprintf(fp, fmt, args);
7c92fe0e 186 if (*color)
dc6ebd4c 187 r += fprintf(fp, "%s", GIT_COLOR_RESET);
7c92fe0e 188 if (trail)
f26a0012 189 r += fprintf(fp, "%s", trail);
7c92fe0e
JK
190 return r;
191}
192
193
194
f26a0012 195int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
7c92fe0e
JK
196{
197 va_list args;
198 int r;
199 va_start(args, fmt);
f26a0012 200 r = color_vfprintf(fp, color, fmt, args, NULL);
7c92fe0e
JK
201 va_end(args);
202 return r;
203}
204
f26a0012 205int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
7c92fe0e
JK
206{
207 va_list args;
208 int r;
209 va_start(args, fmt);
f26a0012 210 r = color_vfprintf(fp, color, fmt, args, "\n");
7c92fe0e
JK
211 va_end(args);
212 return r;
213}