git config: don't allow multiple config file locations
[git/git.git] / builtin-config.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "color.h"
4 #include "parse-options.h"
5
6 static const char *const builtin_config_usage[] = {
7 "git config [options]",
8 NULL
9 };
10
11 static char *key;
12 static regex_t *key_regexp;
13 static regex_t *regexp;
14 static int show_keys;
15 static int use_key_regexp;
16 static int do_all;
17 static int do_not_match;
18 static int seen;
19 static char delim = '=';
20 static char key_delim = ' ';
21 static char term = '\n';
22 static enum { T_RAW, T_INT, T_BOOL, T_BOOL_OR_INT } type = T_RAW;
23
24 static int use_global_config, use_system_config;
25 static const char *given_config_file;
26 static int actions;
27 static const char *get_color_slot, *get_colorbool_slot;
28 static int end_null;
29
30 #define ACTION_GET (1<<0)
31 #define ACTION_GET_ALL (1<<1)
32 #define ACTION_GET_REGEXP (1<<2)
33 #define ACTION_REPLACE_ALL (1<<3)
34 #define ACTION_ADD (1<<4)
35 #define ACTION_UNSET (1<<5)
36 #define ACTION_UNSET_ALL (1<<6)
37 #define ACTION_RENAME_SECTION (1<<7)
38 #define ACTION_REMOVE_SECTION (1<<8)
39 #define ACTION_LIST (1<<9)
40 #define ACTION_EDIT (1<<10)
41 #define ACTION_SET (1<<11)
42 #define ACTION_SET_ALL (1<<12)
43 #define ACTION_GET_COLOR (1<<13)
44 #define ACTION_GET_COLORBOOL (1<<14)
45
46 static struct option builtin_config_options[] = {
47 OPT_GROUP("Config file location"),
48 OPT_BOOLEAN(0, "global", &use_global_config, "use global config file"),
49 OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
50 OPT_STRING('f', "file", &given_config_file, "FILE", "use given config file"),
51 OPT_GROUP("Action"),
52 OPT_BIT(0, "get", &actions, "get value: name [value-regex]", ACTION_GET),
53 OPT_BIT(0, "get-all", &actions, "get all values: key [value-regex]", ACTION_GET_ALL),
54 OPT_BIT(0, "get-regexp", &actions, "get values for regexp: name-regex [value-regex]", ACTION_GET_REGEXP),
55 OPT_BIT(0, "replace-all", &actions, "replace all matching variables: name [value [value_regex]", ACTION_REPLACE_ALL),
56 OPT_BIT(0, "add", &actions, "adds a new variable: name value", ACTION_ADD),
57 OPT_BIT(0, "unset", &actions, "removes a variable: name [value-regex]", ACTION_UNSET),
58 OPT_BIT(0, "unset-all", &actions, "removes all matches: name [value-regex]", ACTION_UNSET_ALL),
59 OPT_BIT(0, "rename-section", &actions, "rename section: old-name new-name", ACTION_RENAME_SECTION),
60 OPT_BIT(0, "remove-section", &actions, "remove a section: name", ACTION_REMOVE_SECTION),
61 OPT_BIT('l', "list", &actions, "list all", ACTION_LIST),
62 OPT_BIT('e', "edit", &actions, "opens an editor", ACTION_EDIT),
63 OPT_STRING(0, "get-color", &get_color_slot, "slot", "find the color configured: [default]"),
64 OPT_STRING(0, "get-colorbool", &get_colorbool_slot, "slot", "find the color setting: [stdout-is-tty]"),
65 OPT_GROUP("Type"),
66 OPT_SET_INT(0, "bool", &type, "value is \"true\" or \"false\"", T_BOOL),
67 OPT_SET_INT(0, "int", &type, "value is decimal number", T_INT),
68 OPT_SET_INT(0, "bool-or-int", &type, NULL, T_BOOL_OR_INT),
69 OPT_GROUP("Other"),
70 OPT_BOOLEAN('z', "null", &end_null, "terminate values with NUL byte"),
71 OPT_END(),
72 };
73
74 static void check_argc(int argc, int min, int max) {
75 if (argc >= min && argc <= max)
76 return;
77 error("wrong number of arguments");
78 usage_with_options(builtin_config_usage, builtin_config_options);
79 }
80
81 static int show_all_config(const char *key_, const char *value_, void *cb)
82 {
83 if (value_)
84 printf("%s%c%s%c", key_, delim, value_, term);
85 else
86 printf("%s%c", key_, term);
87 return 0;
88 }
89
90 static int show_config(const char *key_, const char *value_, void *cb)
91 {
92 char value[256];
93 const char *vptr = value;
94 int dup_error = 0;
95
96 if (!use_key_regexp && strcmp(key_, key))
97 return 0;
98 if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
99 return 0;
100 if (regexp != NULL &&
101 (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
102 return 0;
103
104 if (show_keys) {
105 if (value_)
106 printf("%s%c", key_, key_delim);
107 else
108 printf("%s", key_);
109 }
110 if (seen && !do_all)
111 dup_error = 1;
112 if (type == T_INT)
113 sprintf(value, "%d", git_config_int(key_, value_?value_:""));
114 else if (type == T_BOOL)
115 vptr = git_config_bool(key_, value_) ? "true" : "false";
116 else if (type == T_BOOL_OR_INT) {
117 int is_bool, v;
118 v = git_config_bool_or_int(key_, value_, &is_bool);
119 if (is_bool)
120 vptr = v ? "true" : "false";
121 else
122 sprintf(value, "%d", v);
123 }
124 else
125 vptr = value_?value_:"";
126 seen++;
127 if (dup_error) {
128 error("More than one value for the key %s: %s",
129 key_, vptr);
130 }
131 else
132 printf("%s%c", vptr, term);
133
134 return 0;
135 }
136
137 static int get_value(const char *key_, const char *regex_)
138 {
139 int ret = -1;
140 char *tl;
141 char *global = NULL, *repo_config = NULL;
142 const char *system_wide = NULL, *local;
143
144 local = config_exclusive_filename;
145 if (!local) {
146 const char *home = getenv("HOME");
147 local = repo_config = git_pathdup("config");
148 if (git_config_global() && home)
149 global = xstrdup(mkpath("%s/.gitconfig", home));
150 if (git_config_system())
151 system_wide = git_etc_gitconfig();
152 }
153
154 key = xstrdup(key_);
155 for (tl=key+strlen(key)-1; tl >= key && *tl != '.'; --tl)
156 *tl = tolower(*tl);
157 for (tl=key; *tl && *tl != '.'; ++tl)
158 *tl = tolower(*tl);
159
160 if (use_key_regexp) {
161 key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
162 if (regcomp(key_regexp, key, REG_EXTENDED)) {
163 fprintf(stderr, "Invalid key pattern: %s\n", key_);
164 goto free_strings;
165 }
166 }
167
168 if (regex_) {
169 if (regex_[0] == '!') {
170 do_not_match = 1;
171 regex_++;
172 }
173
174 regexp = (regex_t*)xmalloc(sizeof(regex_t));
175 if (regcomp(regexp, regex_, REG_EXTENDED)) {
176 fprintf(stderr, "Invalid pattern: %s\n", regex_);
177 goto free_strings;
178 }
179 }
180
181 if (do_all && system_wide)
182 git_config_from_file(show_config, system_wide, NULL);
183 if (do_all && global)
184 git_config_from_file(show_config, global, NULL);
185 git_config_from_file(show_config, local, NULL);
186 if (!do_all && !seen && global)
187 git_config_from_file(show_config, global, NULL);
188 if (!do_all && !seen && system_wide)
189 git_config_from_file(show_config, system_wide, NULL);
190
191 free(key);
192 if (regexp) {
193 regfree(regexp);
194 free(regexp);
195 }
196
197 if (do_all)
198 ret = !seen;
199 else
200 ret = (seen == 1) ? 0 : seen > 1 ? 2 : 1;
201
202 free_strings:
203 free(repo_config);
204 free(global);
205 return ret;
206 }
207
208 static char *normalize_value(const char *key, const char *value)
209 {
210 char *normalized;
211
212 if (!value)
213 return NULL;
214
215 if (type == T_RAW)
216 normalized = xstrdup(value);
217 else {
218 normalized = xmalloc(64);
219 if (type == T_INT) {
220 int v = git_config_int(key, value);
221 sprintf(normalized, "%d", v);
222 }
223 else if (type == T_BOOL)
224 sprintf(normalized, "%s",
225 git_config_bool(key, value) ? "true" : "false");
226 else if (type == T_BOOL_OR_INT) {
227 int is_bool, v;
228 v = git_config_bool_or_int(key, value, &is_bool);
229 if (!is_bool)
230 sprintf(normalized, "%d", v);
231 else
232 sprintf(normalized, "%s", v ? "true" : "false");
233 }
234 }
235
236 return normalized;
237 }
238
239 static int get_color_found;
240 static const char *get_color_slot;
241 static const char *get_colorbool_slot;
242 static char parsed_color[COLOR_MAXLEN];
243
244 static int git_get_color_config(const char *var, const char *value, void *cb)
245 {
246 if (!strcmp(var, get_color_slot)) {
247 if (!value)
248 config_error_nonbool(var);
249 color_parse(value, var, parsed_color);
250 get_color_found = 1;
251 }
252 return 0;
253 }
254
255 static void get_color(const char *def_color)
256 {
257 get_color_found = 0;
258 parsed_color[0] = '\0';
259 git_config(git_get_color_config, NULL);
260
261 if (!get_color_found && def_color)
262 color_parse(def_color, "command line", parsed_color);
263
264 fputs(parsed_color, stdout);
265 }
266
267 static int stdout_is_tty;
268 static int get_colorbool_found;
269 static int get_diff_color_found;
270 static int git_get_colorbool_config(const char *var, const char *value,
271 void *cb)
272 {
273 if (!strcmp(var, get_colorbool_slot)) {
274 get_colorbool_found =
275 git_config_colorbool(var, value, stdout_is_tty);
276 }
277 if (!strcmp(var, "diff.color")) {
278 get_diff_color_found =
279 git_config_colorbool(var, value, stdout_is_tty);
280 }
281 if (!strcmp(var, "color.ui")) {
282 git_use_color_default = git_config_colorbool(var, value, stdout_is_tty);
283 return 0;
284 }
285 return 0;
286 }
287
288 static int get_colorbool(int print)
289 {
290 get_colorbool_found = -1;
291 get_diff_color_found = -1;
292 git_config(git_get_colorbool_config, NULL);
293
294 if (get_colorbool_found < 0) {
295 if (!strcmp(get_colorbool_slot, "color.diff"))
296 get_colorbool_found = get_diff_color_found;
297 if (get_colorbool_found < 0)
298 get_colorbool_found = git_use_color_default;
299 }
300
301 if (print) {
302 printf("%s\n", get_colorbool_found ? "true" : "false");
303 return 0;
304 } else
305 return get_colorbool_found ? 0 : 1;
306 }
307
308 int cmd_config(int argc, const char **argv, const char *unused_prefix)
309 {
310 int nongit;
311 char *value;
312 const char *prefix = setup_git_directory_gently(&nongit);
313
314 config_exclusive_filename = getenv(CONFIG_ENVIRONMENT);
315
316 argc = parse_options(argc, argv, builtin_config_options, builtin_config_usage,
317 PARSE_OPT_STOP_AT_NON_OPTION);
318
319 if (use_global_config + use_system_config + !!given_config_file > 1) {
320 error("only one config file at a time.");
321 usage_with_options(builtin_config_usage, builtin_config_options);
322 }
323
324 if (use_global_config) {
325 char *home = getenv("HOME");
326 if (home) {
327 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
328 config_exclusive_filename = user_config;
329 } else {
330 die("$HOME not set");
331 }
332 }
333 else if (use_system_config)
334 config_exclusive_filename = git_etc_gitconfig();
335 else if (given_config_file) {
336 if (!is_absolute_path(given_config_file) && prefix)
337 config_exclusive_filename = prefix_filename(prefix,
338 strlen(prefix),
339 argv[2]);
340 else
341 config_exclusive_filename = given_config_file;
342 }
343
344 if (end_null) {
345 term = '\0';
346 delim = '\n';
347 key_delim = '\n';
348 }
349
350 if (get_color_slot)
351 actions |= ACTION_GET_COLOR;
352 if (get_colorbool_slot)
353 actions |= ACTION_GET_COLORBOOL;
354
355 if (HAS_MULTI_BITS(actions)) {
356 error("only one action at a time.");
357 usage_with_options(builtin_config_usage, builtin_config_options);
358 }
359 if (actions == 0)
360 switch (argc) {
361 case 1: actions = ACTION_GET; break;
362 case 2: actions = ACTION_SET; break;
363 case 3: actions = ACTION_SET_ALL; break;
364 default:
365 usage_with_options(builtin_config_usage, builtin_config_options);
366 }
367
368 if (actions == ACTION_LIST) {
369 if (git_config(show_all_config, NULL) < 0) {
370 if (config_exclusive_filename)
371 die("unable to read config file %s: %s",
372 config_exclusive_filename, strerror(errno));
373 else
374 die("error processing config file(s)");
375 }
376 }
377 else if (actions == ACTION_EDIT) {
378 git_config(git_default_config, NULL);
379 launch_editor(config_exclusive_filename ?
380 config_exclusive_filename : git_path("config"),
381 NULL, NULL);
382 }
383 else if (actions == ACTION_SET) {
384 check_argc(argc, 2, 2);
385 value = normalize_value(argv[0], argv[1]);
386 return git_config_set(argv[0], value);
387 }
388 else if (actions == ACTION_SET_ALL) {
389 check_argc(argc, 2, 3);
390 value = normalize_value(argv[0], argv[1]);
391 return git_config_set_multivar(argv[0], value, argv[2], 0);
392 }
393 else if (actions == ACTION_ADD) {
394 check_argc(argc, 2, 2);
395 value = normalize_value(argv[0], argv[1]);
396 return git_config_set_multivar(argv[0], value, "^$", 0);
397 }
398 else if (actions == ACTION_REPLACE_ALL) {
399 check_argc(argc, 2, 3);
400 value = normalize_value(argv[0], argv[1]);
401 return git_config_set_multivar(argv[0], value, argv[2], 1);
402 }
403 else if (actions == ACTION_GET) {
404 check_argc(argc, 1, 2);
405 return get_value(argv[0], argv[1]);
406 }
407 else if (actions == ACTION_GET_ALL) {
408 do_all = 1;
409 check_argc(argc, 1, 2);
410 return get_value(argv[0], argv[1]);
411 }
412 else if (actions == ACTION_GET_REGEXP) {
413 show_keys = 1;
414 use_key_regexp = 1;
415 do_all = 1;
416 check_argc(argc, 1, 2);
417 return get_value(argv[0], argv[1]);
418 }
419 else if (actions == ACTION_UNSET) {
420 check_argc(argc, 1, 2);
421 if (argc == 2)
422 return git_config_set_multivar(argv[0], NULL, argv[1], 0);
423 else
424 return git_config_set(argv[0], NULL);
425 }
426 else if (actions == ACTION_UNSET_ALL) {
427 check_argc(argc, 1, 2);
428 return git_config_set_multivar(argv[0], NULL, argv[1], 1);
429 }
430 else if (actions == ACTION_RENAME_SECTION) {
431 int ret;
432 check_argc(argc, 2, 2);
433 ret = git_config_rename_section(argv[0], argv[1]);
434 if (ret < 0)
435 return ret;
436 if (ret == 0)
437 die("No such section!");
438 }
439 else if (actions == ACTION_REMOVE_SECTION) {
440 int ret;
441 check_argc(argc, 1, 1);
442 ret = git_config_rename_section(argv[0], NULL);
443 if (ret < 0)
444 return ret;
445 if (ret == 0)
446 die("No such section!");
447 }
448 else if (actions == ACTION_GET_COLOR) {
449 get_color(argv[0]);
450 }
451 else if (actions == ACTION_GET_COLORBOOL) {
452 if (argc == 1)
453 stdout_is_tty = git_config_bool("command line", argv[0]);
454 else if (argc == 0)
455 stdout_is_tty = isatty(1);
456 return get_colorbool(argc != 0);
457 }
458
459 return 0;
460 }