Rename the "crlf" attribute "text"
[git/git.git] / config.c
CommitLineData
10bea152
JS
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
17712991 8#include "cache.h"
7f0e39fa 9#include "exec_cmd.h"
17712991
LT
10
11#define MAXNAME (256)
12
13static FILE *config_file;
0dccc7dc 14static const char *config_file_name;
17712991 15static int config_linenr;
02e5ba4a 16static int config_file_eof;
960ccca6
DH
17static int zlib_compression_seen;
18
dc871831
DB
19const char *config_exclusive_filename = NULL;
20
17712991
LT
21static int get_next_char(void)
22{
23 int c;
24 FILE *f;
25
26 c = '\n';
27 if ((f = config_file) != NULL) {
28 c = fgetc(f);
db2c075d
JH
29 if (c == '\r') {
30 /* DOS like systems */
31 c = fgetc(f);
32 if (c != '\n') {
33 ungetc(c, f);
34 c = '\r';
35 }
36 }
17712991
LT
37 if (c == '\n')
38 config_linenr++;
39 if (c == EOF) {
02e5ba4a 40 config_file_eof = 1;
17712991
LT
41 c = '\n';
42 }
43 }
44 return c;
45}
46
47static char *parse_value(void)
48{
49 static char value[1024];
50 int quote = 0, comment = 0, len = 0, space = 0;
51
52 for (;;) {
53 int c = get_next_char();
e0b3cc0d 54 if (len >= sizeof(value) - 1)
17712991
LT
55 return NULL;
56 if (c == '\n') {
57 if (quote)
58 return NULL;
59 value[len] = 0;
60 return value;
61 }
62 if (comment)
63 continue;
64 if (isspace(c) && !quote) {
ebdaae37
BS
65 if (len)
66 space++;
17712991
LT
67 continue;
68 }
7ebdba61
JS
69 if (!quote) {
70 if (c == ';' || c == '#') {
71 comment = 1;
72 continue;
73 }
74 }
ebdaae37
BS
75 for (; space; space--)
76 value[len++] = ' ';
17712991
LT
77 if (c == '\\') {
78 c = get_next_char();
79 switch (c) {
80 case '\n':
81 continue;
82 case 't':
83 c = '\t';
84 break;
85 case 'b':
86 c = '\b';
87 break;
88 case 'n':
89 c = '\n';
90 break;
5cbb401d
LT
91 /* Some characters escape as themselves */
92 case '\\': case '"':
93 break;
94 /* Reject unknown escape sequences */
95 default:
96 return NULL;
17712991
LT
97 }
98 value[len++] = c;
99 continue;
100 }
101 if (c == '"') {
102 quote = 1-quote;
103 continue;
104 }
17712991
LT
105 value[len++] = c;
106 }
107}
108
38c5afa8
LT
109static inline int iskeychar(int c)
110{
111 return isalnum(c) || c == '-';
112}
113
ef90d6d4 114static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
115{
116 int c;
117 char *value;
118
119 /* Get the full name */
120 for (;;) {
121 c = get_next_char();
02e5ba4a 122 if (config_file_eof)
17712991 123 break;
38c5afa8 124 if (!iskeychar(c))
17712991
LT
125 break;
126 name[len++] = tolower(c);
127 if (len >= MAXNAME)
128 return -1;
129 }
130 name[len] = 0;
131 while (c == ' ' || c == '\t')
132 c = get_next_char();
133
134 value = NULL;
135 if (c != '\n') {
136 if (c != '=')
137 return -1;
138 value = parse_value();
139 if (!value)
140 return -1;
141 }
ef90d6d4 142 return fn(name, value, data);
17712991
LT
143}
144
d14f7764
LT
145static int get_extended_base_var(char *name, int baselen, int c)
146{
147 do {
148 if (c == '\n')
149 return -1;
150 c = get_next_char();
151 } while (isspace(c));
152
153 /* We require the format to be '[base "extension"]' */
154 if (c != '"')
155 return -1;
156 name[baselen++] = '.';
157
158 for (;;) {
159 int c = get_next_char();
160 if (c == '\n')
161 return -1;
162 if (c == '"')
163 break;
164 if (c == '\\') {
165 c = get_next_char();
166 if (c == '\n')
167 return -1;
168 }
169 name[baselen++] = c;
170 if (baselen > MAXNAME / 2)
171 return -1;
172 }
173
174 /* Final ']' */
175 if (get_next_char() != ']')
176 return -1;
177 return baselen;
178}
179
17712991
LT
180static int get_base_var(char *name)
181{
182 int baselen = 0;
183
184 for (;;) {
185 int c = get_next_char();
02e5ba4a 186 if (config_file_eof)
17712991
LT
187 return -1;
188 if (c == ']')
189 return baselen;
d14f7764
LT
190 if (isspace(c))
191 return get_extended_base_var(name, baselen, c);
38c5afa8 192 if (!iskeychar(c) && c != '.')
17712991
LT
193 return -1;
194 if (baselen > MAXNAME / 2)
195 return -1;
196 name[baselen++] = tolower(c);
197 }
198}
199
ef90d6d4 200static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
201{
202 int comment = 0;
203 int baselen = 0;
204 static char var[MAXNAME];
205
de056402
PB
206 /* U+FEFF Byte Order Mark in UTF8 */
207 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
208 const unsigned char *bomptr = utf8_bom;
209
17712991
LT
210 for (;;) {
211 int c = get_next_char();
de056402
PB
212 if (bomptr && *bomptr) {
213 /* We are at the file beginning; skip UTF8-encoded BOM
214 * if present. Sane editors won't put this in on their
215 * own, but e.g. Windows Notepad will do it happily. */
216 if ((unsigned char) c == *bomptr) {
217 bomptr++;
218 continue;
219 } else {
220 /* Do not tolerate partial BOM. */
221 if (bomptr != utf8_bom)
222 break;
223 /* No BOM at file beginning. Cool. */
224 bomptr = NULL;
225 }
226 }
17712991 227 if (c == '\n') {
02e5ba4a 228 if (config_file_eof)
17712991
LT
229 return 0;
230 comment = 0;
231 continue;
232 }
233 if (comment || isspace(c))
234 continue;
235 if (c == '#' || c == ';') {
236 comment = 1;
237 continue;
238 }
239 if (c == '[') {
240 baselen = get_base_var(var);
241 if (baselen <= 0)
242 break;
243 var[baselen++] = '.';
244 var[baselen] = 0;
245 continue;
246 }
247 if (!isalpha(c))
248 break;
128af9d1 249 var[baselen] = tolower(c);
ef90d6d4 250 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
251 break;
252 }
4f629539 253 die("bad config file line %d in %s", config_linenr, config_file_name);
17712991
LT
254}
255
c8deb5a1 256static int parse_unit_factor(const char *end, unsigned long *val)
0b87b6e0
BD
257{
258 if (!*end)
259 return 1;
c8deb5a1
SP
260 else if (!strcasecmp(end, "k")) {
261 *val *= 1024;
262 return 1;
263 }
264 else if (!strcasecmp(end, "m")) {
265 *val *= 1024 * 1024;
266 return 1;
267 }
268 else if (!strcasecmp(end, "g")) {
269 *val *= 1024 * 1024 * 1024;
270 return 1;
271 }
272 return 0;
0b87b6e0
BD
273}
274
0433bcd9 275static int git_parse_long(const char *value, long *ret)
0b87b6e0
BD
276{
277 if (value && *value) {
278 char *end;
279 long val = strtol(value, &end, 0);
c8deb5a1
SP
280 unsigned long factor = 1;
281 if (!parse_unit_factor(end, &factor))
282 return 0;
283 *ret = val * factor;
0b87b6e0
BD
284 return 1;
285 }
286 return 0;
287}
288
289int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
290{
291 if (value && *value) {
292 char *end;
0b87b6e0 293 unsigned long val = strtoul(value, &end, 0);
c8deb5a1
SP
294 if (!parse_unit_factor(end, &val))
295 return 0;
296 *ret = val;
0b87b6e0 297 return 1;
17712991 298 }
0b87b6e0
BD
299 return 0;
300}
301
c1867cea
JK
302static void die_bad_config(const char *name)
303{
304 if (config_file_name)
305 die("bad config value for '%s' in %s", name, config_file_name);
306 die("bad config value for '%s'", name);
307}
308
0b87b6e0
BD
309int git_config_int(const char *name, const char *value)
310{
0433bcd9 311 long ret = 0;
0b87b6e0 312 if (!git_parse_long(value, &ret))
c1867cea 313 die_bad_config(name);
0b87b6e0
BD
314 return ret;
315}
316
317unsigned long git_config_ulong(const char *name, const char *value)
318{
319 unsigned long ret;
320 if (!git_parse_ulong(value, &ret))
c1867cea 321 die_bad_config(name);
0b87b6e0 322 return ret;
17712991
LT
323}
324
a53f2ec6 325int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
17712991 326{
a53f2ec6 327 *is_bool = 1;
17712991
LT
328 if (!value)
329 return 1;
330 if (!*value)
331 return 0;
8f8c6faf 332 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on"))
17712991 333 return 1;
8f8c6faf 334 if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off"))
17712991 335 return 0;
a53f2ec6 336 *is_bool = 0;
c35b0b58 337 return git_config_int(name, value);
17712991
LT
338}
339
a53f2ec6
JH
340int git_config_bool(const char *name, const char *value)
341{
342 int discard;
c35b0b58 343 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
344}
345
ea5105a5
CC
346int git_config_string(const char **dest, const char *var, const char *value)
347{
348 if (!value)
349 return config_error_nonbool(var);
350 *dest = xstrdup(value);
351 return 0;
352}
353
395de250
MM
354int git_config_pathname(const char **dest, const char *var, const char *value)
355{
356 if (!value)
357 return config_error_nonbool(var);
358 *dest = expand_user_path(value);
359 if (!*dest)
360 die("Failed to expand user dir in: '%s'", value);
361 return 0;
362}
363
806e2ad7 364static int git_default_core_config(const char *var, const char *value)
17712991
LT
365{
366 /* This needs a better name */
367 if (!strcmp(var, "core.filemode")) {
368 trust_executable_bit = git_config_bool(var, value);
369 return 0;
370 }
1ce4790b
AR
371 if (!strcmp(var, "core.trustctime")) {
372 trust_ctime = git_config_bool(var, value);
373 return 0;
374 }
17712991 375
9378c161
JH
376 if (!strcmp(var, "core.quotepath")) {
377 quote_path_fully = git_config_bool(var, value);
378 return 0;
379 }
380
78a8d641
JS
381 if (!strcmp(var, "core.symlinks")) {
382 has_symlinks = git_config_bool(var, value);
383 return 0;
384 }
385
0a9b88b7
LT
386 if (!strcmp(var, "core.ignorecase")) {
387 ignore_case = git_config_bool(var, value);
388 return 0;
389 }
390
7d1864ce
JH
391 if (!strcmp(var, "core.bare")) {
392 is_bare_repository_cfg = git_config_bool(var, value);
393 return 0;
394 }
395
5f73076c
JH
396 if (!strcmp(var, "core.ignorestat")) {
397 assume_unchanged = git_config_bool(var, value);
398 return 0;
399 }
400
e388c738
JH
401 if (!strcmp(var, "core.prefersymlinkrefs")) {
402 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
403 return 0;
404 }
405
6de08ae6
SP
406 if (!strcmp(var, "core.logallrefupdates")) {
407 log_all_ref_updates = git_config_bool(var, value);
408 return 0;
409 }
410
2f8acdb3
JH
411 if (!strcmp(var, "core.warnambiguousrefs")) {
412 warn_ambiguous_refs = git_config_bool(var, value);
413 return 0;
414 }
415
960ccca6 416 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
417 int level = git_config_int(var, value);
418 if (level == -1)
419 level = Z_DEFAULT_COMPRESSION;
420 else if (level < 0 || level > Z_BEST_COMPRESSION)
421 die("bad zlib compression level %d", level);
422 zlib_compression_level = level;
960ccca6
DH
423 zlib_compression_seen = 1;
424 return 0;
425 }
426
427 if (!strcmp(var, "core.compression")) {
428 int level = git_config_int(var, value);
429 if (level == -1)
430 level = Z_DEFAULT_COMPRESSION;
431 else if (level < 0 || level > Z_BEST_COMPRESSION)
432 die("bad zlib compression level %d", level);
433 core_compression_level = level;
434 core_compression_seen = 1;
435 if (!zlib_compression_seen)
436 zlib_compression_level = level;
12f6c308
JBH
437 return 0;
438 }
439
60bb8b14 440 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 441 int pgsz_x2 = getpagesize() * 2;
60bb8b14 442 packed_git_window_size = git_config_int(var, value);
5faaf246
JH
443
444 /* This value must be multiple of (pagesize * 2) */
445 packed_git_window_size /= pgsz_x2;
446 if (packed_git_window_size < 1)
447 packed_git_window_size = 1;
448 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
449 return 0;
450 }
451
77ccc5bb
SP
452 if (!strcmp(var, "core.packedgitlimit")) {
453 packed_git_limit = git_config_int(var, value);
454 return 0;
455 }
456
18bdec11
SP
457 if (!strcmp(var, "core.deltabasecachelimit")) {
458 delta_base_cache_limit = git_config_int(var, value);
459 return 0;
460 }
461
6c510bee 462 if (!strcmp(var, "core.autocrlf")) {
d7f46334 463 if (value && !strcasecmp(value, "input")) {
fd6cce9e 464 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
465 return 0;
466 }
6c510bee
LT
467 auto_crlf = git_config_bool(var, value);
468 return 0;
469 }
470
21e5ad50
SP
471 if (!strcmp(var, "core.safecrlf")) {
472 if (value && !strcasecmp(value, "warn")) {
473 safe_crlf = SAFE_CRLF_WARN;
474 return 0;
475 }
476 safe_crlf = git_config_bool(var, value);
477 return 0;
478 }
479
a97a7468
JS
480 if (!strcmp(var, "core.notesref")) {
481 notes_ref_name = xstrdup(value);
482 return 0;
483 }
484
806e2ad7
LT
485 if (!strcmp(var, "core.pager"))
486 return git_config_string(&pager_program, var, value);
487
488 if (!strcmp(var, "core.editor"))
489 return git_config_string(&editor_program, var, value);
490
491 if (!strcmp(var, "core.excludesfile"))
395de250 492 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
493
494 if (!strcmp(var, "core.whitespace")) {
495 if (!value)
496 return config_error_nonbool(var);
497 whitespace_rule_cfg = parse_whitespace_rule(value);
498 return 0;
499 }
500
aafe9fba
LT
501 if (!strcmp(var, "core.fsyncobjectfiles")) {
502 fsync_object_files = git_config_bool(var, value);
503 return 0;
504 }
505
671c9b7e
LT
506 if (!strcmp(var, "core.preloadindex")) {
507 core_preload_index = git_config_bool(var, value);
508 return 0;
509 }
510
348df166
JS
511 if (!strcmp(var, "core.createobject")) {
512 if (!strcmp(value, "rename"))
513 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
514 else if (!strcmp(value, "link"))
515 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
516 else
517 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
518 return 0;
519 }
520
08aefc9e
NTND
521 if (!strcmp(var, "core.sparsecheckout")) {
522 core_apply_sparse_checkout = git_config_bool(var, value);
523 return 0;
524 }
525
806e2ad7
LT
526 /* Add other config variables here and to Documentation/config.txt. */
527 return 0;
528}
529
d1364529 530static int git_default_user_config(const char *var, const char *value)
806e2ad7 531{
e1b10391 532 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
533 if (!value)
534 return config_error_nonbool(var);
817151e6 535 strlcpy(git_default_name, value, sizeof(git_default_name));
91c38a21 536 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
e1b10391
LT
537 return 0;
538 }
539
540 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
541 if (!value)
542 return config_error_nonbool(var);
817151e6 543 strlcpy(git_default_email, value, sizeof(git_default_email));
91c38a21 544 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
e1b10391
LT
545 return 0;
546 }
547
d1364529
LT
548 /* Add other config variables here and to Documentation/config.txt. */
549 return 0;
550}
551
1141f492 552static int git_default_i18n_config(const char *var, const char *value)
d1364529 553{
ea5105a5
CC
554 if (!strcmp(var, "i18n.commitencoding"))
555 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 556
ea5105a5
CC
557 if (!strcmp(var, "i18n.logoutputencoding"))
558 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 559
1141f492
LT
560 /* Add other config variables here and to Documentation/config.txt. */
561 return 0;
562}
039bc64e 563
1141f492
LT
564static int git_default_branch_config(const char *var, const char *value)
565{
9ed36cfa
JS
566 if (!strcmp(var, "branch.autosetupmerge")) {
567 if (value && !strcasecmp(value, "always")) {
568 git_branch_track = BRANCH_TRACK_ALWAYS;
569 return 0;
570 }
571 git_branch_track = git_config_bool(var, value);
572 return 0;
573 }
c998ae9b
DS
574 if (!strcmp(var, "branch.autosetuprebase")) {
575 if (!value)
576 return config_error_nonbool(var);
577 else if (!strcmp(value, "never"))
578 autorebase = AUTOREBASE_NEVER;
579 else if (!strcmp(value, "local"))
580 autorebase = AUTOREBASE_LOCAL;
581 else if (!strcmp(value, "remote"))
582 autorebase = AUTOREBASE_REMOTE;
583 else if (!strcmp(value, "always"))
584 autorebase = AUTOREBASE_ALWAYS;
585 else
586 return error("Malformed value for %s", var);
587 return 0;
588 }
a9cc857a 589
1ab661dd 590 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
591 return 0;
592}
593
52153747
FAG
594static int git_default_push_config(const char *var, const char *value)
595{
596 if (!strcmp(var, "push.default")) {
597 if (!value)
598 return config_error_nonbool(var);
599 else if (!strcmp(value, "nothing"))
600 push_default = PUSH_DEFAULT_NOTHING;
601 else if (!strcmp(value, "matching"))
602 push_default = PUSH_DEFAULT_MATCHING;
603 else if (!strcmp(value, "tracking"))
604 push_default = PUSH_DEFAULT_TRACKING;
605 else if (!strcmp(value, "current"))
606 push_default = PUSH_DEFAULT_CURRENT;
607 else {
608 error("Malformed value for %s: %s", var, value);
609 return error("Must be one of nothing, matching, "
610 "tracking or current.");
611 }
612 return 0;
613 }
614
615 /* Add other config variables here and to Documentation/config.txt. */
616 return 0;
617}
618
d551a488
MSO
619static int git_default_mailmap_config(const char *var, const char *value)
620{
621 if (!strcmp(var, "mailmap.file"))
622 return git_config_string(&git_mailmap_file, var, value);
623
624 /* Add other config variables here and to Documentation/config.txt. */
625 return 0;
626}
627
1141f492
LT
628int git_default_config(const char *var, const char *value, void *dummy)
629{
630 if (!prefixcmp(var, "core."))
631 return git_default_core_config(var, value);
632
633 if (!prefixcmp(var, "user."))
634 return git_default_user_config(var, value);
635
636 if (!prefixcmp(var, "i18n."))
637 return git_default_i18n_config(var, value);
638
639 if (!prefixcmp(var, "branch."))
640 return git_default_branch_config(var, value);
641
52153747
FAG
642 if (!prefixcmp(var, "push."))
643 return git_default_push_config(var, value);
644
d551a488
MSO
645 if (!prefixcmp(var, "mailmap."))
646 return git_default_mailmap_config(var, value);
647
75194438
JK
648 if (!prefixcmp(var, "advice."))
649 return git_default_advice_config(var, value);
650
1141f492
LT
651 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
652 pager_use_color = git_config_bool(var,value);
653 return 0;
654 }
655
656 /* Add other config variables here and to Documentation/config.txt. */
657 return 0;
658}
659
ef90d6d4 660int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
661{
662 int ret;
4f629539 663 FILE *f = fopen(filename, "r");
17712991
LT
664
665 ret = -1;
666 if (f) {
667 config_file = f;
4f629539 668 config_file_name = filename;
17712991 669 config_linenr = 1;
02e5ba4a 670 config_file_eof = 0;
ef90d6d4 671 ret = git_parse_file(fn, data);
17712991 672 fclose(f);
4f629539 673 config_file_name = NULL;
17712991
LT
674 }
675 return ret;
676}
10bea152 677
506b17b1
JS
678const char *git_etc_gitconfig(void)
679{
7f0e39fa 680 static const char *system_wide;
2de9de5e
SP
681 if (!system_wide)
682 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 683 return system_wide;
506b17b1
JS
684}
685
e4bffb5a 686static int git_env_bool(const char *k, int def)
ab88c363
JK
687{
688 const char *v = getenv(k);
689 return v ? git_config_bool(k, v) : def;
690}
691
692int git_config_system(void)
693{
694 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
695}
696
697int git_config_global(void)
698{
699 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
700}
701
ef90d6d4 702int git_config(config_fn_t fn, void *data)
4f629539 703{
aa387407 704 int ret = 0, found = 0;
5f1a63e0 705 char *repo_config = NULL;
dc871831 706 const char *home = NULL;
5f1a63e0 707
8befc50c 708 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
dc871831
DB
709 if (config_exclusive_filename)
710 return git_config_from_file(fn, config_exclusive_filename, data);
aa387407 711 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
dc871831
DB
712 ret += git_config_from_file(fn, git_etc_gitconfig(),
713 data);
aa387407
FC
714 found += 1;
715 }
5f1a63e0 716
dc871831 717 home = getenv("HOME");
ab88c363 718 if (git_config_global() && home) {
9befac47 719 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
aa387407 720 if (!access(user_config, R_OK)) {
dc871831 721 ret += git_config_from_file(fn, user_config, data);
aa387407
FC
722 found += 1;
723 }
5f1a63e0
JS
724 free(user_config);
725 }
726
a4f34cbb 727 repo_config = git_pathdup("config");
aa387407
FC
728 if (!access(repo_config, R_OK)) {
729 ret += git_config_from_file(fn, repo_config, data);
730 found += 1;
731 }
4cac42b1 732 free(repo_config);
aa387407
FC
733 if (found == 0)
734 return -1;
5f1a63e0 735 return ret;
4f629539
JH
736}
737
10bea152
JS
738/*
739 * Find all the stuff for git_config_set() below.
740 */
4ddba79d
JS
741
742#define MAX_MATCHES 512
743
10bea152
JS
744static struct {
745 int baselen;
4b25d091 746 char *key;
f98d863d 747 int do_not_match;
4b25d091 748 regex_t *value_regex;
4ddba79d 749 int multi_replace;
dc49cd76 750 size_t offset[MAX_MATCHES];
10bea152
JS
751 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
752 int seen;
753} store;
754
4b25d091 755static int matches(const char *key, const char *value)
f98d863d
JS
756{
757 return !strcmp(key, store.key) &&
758 (store.value_regex == NULL ||
759 (store.do_not_match ^
760 !regexec(store.value_regex, value, 0, NULL, 0)));
761}
762
4b25d091 763static int store_aux(const char *key, const char *value, void *cb)
10bea152 764{
ae9ee41d
JH
765 const char *ep;
766 size_t section_len;
767
10bea152
JS
768 switch (store.state) {
769 case KEY_SEEN:
f98d863d 770 if (matches(key, value)) {
4ddba79d 771 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 772 warning("%s has multiple values", key);
4ddba79d 773 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 774 error("too many matches for %s", key);
4ddba79d 775 return 1;
10bea152 776 }
4ddba79d
JS
777
778 store.offset[store.seen] = ftell(config_file);
10bea152
JS
779 store.seen++;
780 }
781 break;
782 case SECTION_SEEN:
ae9ee41d
JH
783 /*
784 * What we are looking for is in store.key (both
785 * section and var), and its section part is baselen
786 * long. We found key (again, both section and var).
787 * We would want to know if this key is in the same
788 * section as what we are looking for. We already
789 * know we are in the same section as what should
790 * hold store.key.
791 */
792 ep = strrchr(key, '.');
793 section_len = ep - key;
794
795 if ((section_len != store.baselen) ||
796 memcmp(key, store.key, section_len+1)) {
10bea152
JS
797 store.state = SECTION_END_SEEN;
798 break;
ae9ee41d
JH
799 }
800
801 /*
802 * Do not increment matches: this is no match, but we
803 * just made sure we are in the desired section.
804 */
805 store.offset[store.seen] = ftell(config_file);
10bea152
JS
806 /* fallthru */
807 case SECTION_END_SEEN:
808 case START:
f98d863d 809 if (matches(key, value)) {
4ddba79d 810 store.offset[store.seen] = ftell(config_file);
10bea152
JS
811 store.state = KEY_SEEN;
812 store.seen++;
d14f7764
LT
813 } else {
814 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 815 !strncmp(key, store.key, store.baselen)) {
93ddef3e 816 store.state = SECTION_SEEN;
bdf0ef08 817 store.offset[store.seen] = ftell(config_file);
d14f7764 818 }
bdf0ef08 819 }
10bea152
JS
820 }
821 return 0;
822}
823
64c0d71c 824static int write_error(const char *filename)
480c9e52 825{
64c0d71c 826 error("failed to write new configuration file %s", filename);
480c9e52
AW
827
828 /* Same error code as "failed to rename". */
829 return 4;
830}
831
4b25d091 832static int store_write_section(int fd, const char *key)
10bea152 833{
cb891a59
KH
834 const char *dot;
835 int i, success;
f285a2d7 836 struct strbuf sb = STRBUF_INIT;
d14f7764 837
cb891a59 838 dot = memchr(key, '.', store.baselen);
d14f7764 839 if (dot) {
cb891a59
KH
840 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
841 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 842 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
843 strbuf_addch(&sb, '\\');
844 strbuf_addch(&sb, key[i]);
d14f7764 845 }
cb891a59
KH
846 strbuf_addstr(&sb, "\"]\n");
847 } else {
848 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
849 }
850
cb891a59
KH
851 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
852 strbuf_release(&sb);
480c9e52 853
cb891a59 854 return success;
10bea152
JS
855}
856
4b25d091 857static int store_write_pair(int fd, const char *key, const char *value)
10bea152 858{
cb891a59
KH
859 int i, success;
860 int length = strlen(key + store.baselen + 1);
861 const char *quote = "";
f285a2d7 862 struct strbuf sb = STRBUF_INIT;
cdd4fb15 863
6281f394
JM
864 /*
865 * Check to see if the value needs to be surrounded with a dq pair.
866 * Note that problematic characters are always backslash-quoted; this
867 * check is about not losing leading or trailing SP and strings that
868 * follow beginning-of-comment characters (i.e. ';' and '#') by the
869 * configuration parser.
870 */
cdd4fb15 871 if (value[0] == ' ')
cb891a59 872 quote = "\"";
cdd4fb15
BG
873 for (i = 0; value[i]; i++)
874 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
875 quote = "\"";
876 if (i && value[i - 1] == ' ')
877 quote = "\"";
878
cb891a59
KH
879 strbuf_addf(&sb, "\t%.*s = %s",
880 length, key + store.baselen + 1, quote);
10bea152 881
10bea152
JS
882 for (i = 0; value[i]; i++)
883 switch (value[i]) {
480c9e52 884 case '\n':
cb891a59 885 strbuf_addstr(&sb, "\\n");
480c9e52
AW
886 break;
887 case '\t':
cb891a59 888 strbuf_addstr(&sb, "\\t");
480c9e52
AW
889 break;
890 case '"':
891 case '\\':
cb891a59 892 strbuf_addch(&sb, '\\');
480c9e52 893 default:
cb891a59 894 strbuf_addch(&sb, value[i]);
480c9e52
AW
895 break;
896 }
cb891a59
KH
897 strbuf_addf(&sb, "%s\n", quote);
898
899 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
900 strbuf_release(&sb);
901
902 return success;
10bea152
JS
903}
904
4b25d091
FC
905static ssize_t find_beginning_of_line(const char *contents, size_t size,
906 size_t offset_, int *found_bracket)
4ddba79d 907{
dc49cd76
SP
908 size_t equal_offset = size, bracket_offset = size;
909 ssize_t offset;
4ddba79d 910
7a31cc0f 911contline:
a6080a0a 912 for (offset = offset_-2; offset > 0
4ddba79d
JS
913 && contents[offset] != '\n'; offset--)
914 switch (contents[offset]) {
915 case '=': equal_offset = offset; break;
916 case ']': bracket_offset = offset; break;
917 }
7a31cc0f
FL
918 if (offset > 0 && contents[offset-1] == '\\') {
919 offset_ = offset;
920 goto contline;
921 }
4ddba79d
JS
922 if (bracket_offset < equal_offset) {
923 *found_bracket = 1;
924 offset = bracket_offset+1;
925 } else
926 offset++;
927
928 return offset;
929}
930
4b25d091 931int git_config_set(const char *key, const char *value)
10bea152 932{
4ddba79d 933 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
934}
935
936/*
937 * If value==NULL, unset in (remove from) config,
938 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
939 * if multi_replace==0, nothing, or only one matching key/value is replaced,
940 * else all matching key/values (regardless how many) are removed,
941 * before the new pair is written.
10bea152
JS
942 *
943 * Returns 0 on success.
944 *
945 * This function does this:
946 *
947 * - it locks the config file by creating ".git/config.lock"
948 *
949 * - it then parses the config using store_aux() as validator to find
950 * the position on the key/value pair to replace. If it is to be unset,
951 * it must be found exactly once.
952 *
953 * - the config file is mmap()ed and the part before the match (if any) is
954 * written to the lock file, then the changed part and the rest.
955 *
956 * - the config file is removed and the lock file rename()d to it.
957 *
958 */
4b25d091
FC
959int git_config_set_multivar(const char *key, const char *value,
960 const char *value_regex, int multi_replace)
10bea152 961{
d14f7764 962 int i, dot;
f8ba655e 963 int fd = -1, in_fd;
dafc88b1 964 int ret;
4b25d091 965 char *config_filename;
6cbf973c 966 struct lock_file *lock = NULL;
4b25d091 967 const char *last_dot = strrchr(key, '.');
4ddba79d 968
dc871831
DB
969 if (config_exclusive_filename)
970 config_filename = xstrdup(config_exclusive_filename);
971 else
a4f34cbb 972 config_filename = git_pathdup("config");
9c3796fc 973
10bea152
JS
974 /*
975 * Since "key" actually contains the section name and the real
976 * key name separated by a dot, we have to know where the dot is.
977 */
b17e659d 978
dafc88b1 979 if (last_dot == NULL) {
64c0d71c 980 error("key does not contain a section: %s", key);
dafc88b1
SH
981 ret = 2;
982 goto out_free;
10bea152 983 }
b17e659d
JS
984 store.baselen = last_dot - key;
985
986 store.multi_replace = multi_replace;
10bea152
JS
987
988 /*
989 * Validate the key and while at it, lower case it for matching.
990 */
2d7320d0 991 store.key = xmalloc(strlen(key) + 1);
d14f7764
LT
992 dot = 0;
993 for (i = 0; key[i]; i++) {
994 unsigned char c = key[i];
995 if (c == '.')
996 dot = 1;
997 /* Leave the extended basename untouched.. */
998 if (!dot || i > store.baselen) {
38c5afa8 999 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
64c0d71c 1000 error("invalid key: %s", key);
d14f7764
LT
1001 free(store.key);
1002 ret = 1;
1003 goto out_free;
1004 }
1005 c = tolower(c);
6f71686e 1006 } else if (c == '\n') {
64c0d71c 1007 error("invalid key (newline): %s", key);
6f71686e
JS
1008 free(store.key);
1009 ret = 1;
1010 goto out_free;
d14f7764
LT
1011 }
1012 store.key[i] = c;
1013 }
3dd94e3b 1014 store.key[i] = 0;
10bea152
JS
1015
1016 /*
6cbf973c 1017 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1018 * contents of .git/config will be written into it.
1019 */
6cbf973c
BS
1020 lock = xcalloc(sizeof(struct lock_file), 1);
1021 fd = hold_lock_file_for_update(lock, config_filename, 0);
1022 if (fd < 0) {
6ffd567b 1023 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1024 free(store.key);
dafc88b1
SH
1025 ret = -1;
1026 goto out_free;
10bea152
JS
1027 }
1028
1029 /*
1030 * If .git/config does not exist yet, write a minimal version.
1031 */
88fb958b
AR
1032 in_fd = open(config_filename, O_RDONLY);
1033 if ( in_fd < 0 ) {
10bea152
JS
1034 free(store.key);
1035
88fb958b
AR
1036 if ( ENOENT != errno ) {
1037 error("opening %s: %s", config_filename,
1038 strerror(errno));
dafc88b1
SH
1039 ret = 3; /* same as "invalid config file" */
1040 goto out_free;
88fb958b 1041 }
10bea152
JS
1042 /* if nothing to unset, error out */
1043 if (value == NULL) {
dafc88b1
SH
1044 ret = 5;
1045 goto out_free;
10bea152
JS
1046 }
1047
4b25d091 1048 store.key = (char *)key;
480c9e52 1049 if (!store_write_section(fd, key) ||
93c1e079
JH
1050 !store_write_pair(fd, key, value))
1051 goto write_err_out;
1052 } else {
88fb958b 1053 struct stat st;
4b25d091 1054 char *contents;
dc49cd76
SP
1055 size_t contents_sz, copy_begin, copy_end;
1056 int i, new_line = 0;
10bea152
JS
1057
1058 if (value_regex == NULL)
1059 store.value_regex = NULL;
1060 else {
f98d863d
JS
1061 if (value_regex[0] == '!') {
1062 store.do_not_match = 1;
1063 value_regex++;
1064 } else
1065 store.do_not_match = 0;
1066
2d7320d0 1067 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1068 if (regcomp(store.value_regex, value_regex,
1069 REG_EXTENDED)) {
64c0d71c 1070 error("invalid pattern: %s", value_regex);
10bea152 1071 free(store.value_regex);
dafc88b1
SH
1072 ret = 6;
1073 goto out_free;
10bea152
JS
1074 }
1075 }
1076
4ddba79d 1077 store.offset[0] = 0;
10bea152
JS
1078 store.state = START;
1079 store.seen = 0;
1080
1081 /*
1082 * After this, store.offset will contain the *end* offset
1083 * of the last match, or remain at 0 if no match was found.
1084 * As a side effect, we make sure to transform only a valid
1085 * existing config file.
1086 */
ef90d6d4 1087 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1088 error("invalid config file %s", config_filename);
10bea152
JS
1089 free(store.key);
1090 if (store.value_regex != NULL) {
1091 regfree(store.value_regex);
1092 free(store.value_regex);
1093 }
dafc88b1
SH
1094 ret = 3;
1095 goto out_free;
10bea152
JS
1096 }
1097
1098 free(store.key);
1099 if (store.value_regex != NULL) {
1100 regfree(store.value_regex);
1101 free(store.value_regex);
1102 }
1103
4ddba79d
JS
1104 /* if nothing to unset, or too many matches, error out */
1105 if ((store.seen == 0 && value == NULL) ||
1106 (store.seen > 1 && multi_replace == 0)) {
dafc88b1
SH
1107 ret = 5;
1108 goto out_free;
10bea152
JS
1109 }
1110
88fb958b 1111 fstat(in_fd, &st);
dc49cd76
SP
1112 contents_sz = xsize_t(st.st_size);
1113 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1114 MAP_PRIVATE, in_fd, 0);
1115 close(in_fd);
1116
4ddba79d
JS
1117 if (store.seen == 0)
1118 store.seen = 1;
1119
1120 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1121 if (store.offset[i] == 0) {
dc49cd76 1122 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1123 } else if (store.state != KEY_SEEN) {
1124 copy_end = store.offset[i];
10bea152 1125 } else
4ddba79d 1126 copy_end = find_beginning_of_line(
dc49cd76 1127 contents, contents_sz,
4ddba79d
JS
1128 store.offset[i]-2, &new_line);
1129
02e5ba4a
JK
1130 if (copy_end > 0 && contents[copy_end-1] != '\n')
1131 new_line = 1;
1132
4ddba79d
JS
1133 /* write the first part of the config */
1134 if (copy_end > copy_begin) {
93c1e079
JH
1135 if (write_in_full(fd, contents + copy_begin,
1136 copy_end - copy_begin) <
1137 copy_end - copy_begin)
1138 goto write_err_out;
1139 if (new_line &&
2b7ca830 1140 write_str_in_full(fd, "\n") != 1)
93c1e079 1141 goto write_err_out;
4ddba79d
JS
1142 }
1143 copy_begin = store.offset[i];
10bea152
JS
1144 }
1145
10bea152
JS
1146 /* write the pair (value == NULL means unset) */
1147 if (value != NULL) {
93c1e079
JH
1148 if (store.state == START) {
1149 if (!store_write_section(fd, key))
1150 goto write_err_out;
480c9e52 1151 }
93c1e079
JH
1152 if (!store_write_pair(fd, key, value))
1153 goto write_err_out;
10bea152
JS
1154 }
1155
1156 /* write the rest of the config */
dc49cd76 1157 if (copy_begin < contents_sz)
93c1e079 1158 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1159 contents_sz - copy_begin) <
1160 contents_sz - copy_begin)
93c1e079 1161 goto write_err_out;
10bea152 1162
dc49cd76 1163 munmap(contents, contents_sz);
10bea152
JS
1164 }
1165
4ed7cd3a 1166 if (commit_lock_file(lock) < 0) {
64c0d71c 1167 error("could not commit config file %s", config_filename);
dafc88b1
SH
1168 ret = 4;
1169 goto out_free;
10bea152
JS
1170 }
1171
6cbf973c
BS
1172 /*
1173 * lock is committed, so don't try to roll it back below.
1174 * NOTE: Since lockfile.c keeps a linked list of all created
1175 * lock_file structures, it isn't safe to free(lock). It's
1176 * better to just leave it hanging around.
1177 */
1178 lock = NULL;
dafc88b1
SH
1179 ret = 0;
1180
1181out_free:
6cbf973c
BS
1182 if (lock)
1183 rollback_lock_file(lock);
4cac42b1 1184 free(config_filename);
dafc88b1 1185 return ret;
93c1e079
JH
1186
1187write_err_out:
64c0d71c 1188 ret = write_error(lock->filename);
93c1e079
JH
1189 goto out_free;
1190
10bea152
JS
1191}
1192
118f8b24
PB
1193static int section_name_match (const char *buf, const char *name)
1194{
1195 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1196 if (buf[i] != '[')
1197 return 0;
1198 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1199 if (!dot && isspace(buf[i])) {
1200 dot = 1;
1201 if (name[j++] != '.')
1202 break;
1203 for (i++; isspace(buf[i]); i++)
1204 ; /* do nothing */
1205 if (buf[i] != '"')
1206 break;
1207 continue;
1208 }
1209 if (buf[i] == '\\' && dot)
1210 i++;
1211 else if (buf[i] == '"' && dot) {
1212 for (i++; isspace(buf[i]); i++)
1213 ; /* do_nothing */
1214 break;
1215 }
1216 if (buf[i] != name[j++])
1217 break;
1218 }
a4c0d463
AV
1219 if (buf[i] == ']' && name[j] == 0) {
1220 /*
1221 * We match, now just find the right length offset by
1222 * gobbling up any whitespace after it, as well
1223 */
1224 i++;
1225 for (; buf[i] && isspace(buf[i]); i++)
1226 ; /* do nothing */
1227 return i;
1228 }
1229 return 0;
118f8b24
PB
1230}
1231
1232/* if new_name == NULL, the section is removed instead */
0667fcfb
JS
1233int git_config_rename_section(const char *old_name, const char *new_name)
1234{
118f8b24 1235 int ret = 0, remove = 0;
fc1905bb 1236 char *config_filename;
0667fcfb
JS
1237 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1238 int out_fd;
1239 char buf[1024];
1240
dc871831
DB
1241 if (config_exclusive_filename)
1242 config_filename = xstrdup(config_exclusive_filename);
1243 else
a4f34cbb 1244 config_filename = git_pathdup("config");
0667fcfb 1245 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1246 if (out_fd < 0) {
64c0d71c 1247 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1248 goto out;
1249 }
0667fcfb 1250
fc1905bb 1251 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1252 /* no config file means nothing to rename, no error */
1253 goto unlock_and_out;
fc1905bb 1254 }
0667fcfb
JS
1255
1256 while (fgets(buf, sizeof(buf), config_file)) {
1257 int i;
480c9e52 1258 int length;
9a5abfc7 1259 char *output = buf;
0667fcfb
JS
1260 for (i = 0; buf[i] && isspace(buf[i]); i++)
1261 ; /* do nothing */
1262 if (buf[i] == '[') {
1263 /* it's a section */
a4c0d463
AV
1264 int offset = section_name_match(&buf[i], old_name);
1265 if (offset > 0) {
118f8b24
PB
1266 ret++;
1267 if (new_name == NULL) {
1268 remove = 1;
0667fcfb
JS
1269 continue;
1270 }
0667fcfb 1271 store.baselen = strlen(new_name);
480c9e52 1272 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1273 ret = write_error(lock->filename);
480c9e52
AW
1274 goto out;
1275 }
9a5abfc7
AV
1276 /*
1277 * We wrote out the new section, with
1278 * a newline, now skip the old
1279 * section's length
1280 */
1281 output += offset + i;
1282 if (strlen(output) > 0) {
1283 /*
1284 * More content means there's
1285 * a declaration to put on the
1286 * next line; indent with a
1287 * tab
1288 */
1289 output -= 1;
1290 output[0] = '\t';
1291 }
0667fcfb 1292 }
118f8b24 1293 remove = 0;
0667fcfb 1294 }
118f8b24
PB
1295 if (remove)
1296 continue;
9a5abfc7
AV
1297 length = strlen(output);
1298 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1299 ret = write_error(lock->filename);
480c9e52
AW
1300 goto out;
1301 }
0667fcfb 1302 }
fc1905bb 1303 fclose(config_file);
01ebb9dc 1304 unlock_and_out:
4ed7cd3a 1305 if (commit_lock_file(lock) < 0)
64c0d71c 1306 ret = error("could not commit config file %s", config_filename);
fc1905bb
JH
1307 out:
1308 free(config_filename);
0667fcfb
JS
1309 return ret;
1310}
40ea4ed9
JH
1311
1312/*
1313 * Call this to report error for your variable that should not
1314 * get a boolean value (i.e. "[my] var" means "true").
1315 */
1316int config_error_nonbool(const char *var)
1317{
1318 return error("Missing value for '%s'", var);
1319}