improve error message in config.c
[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) {
65 space = 1;
66 continue;
67 }
7ebdba61
JS
68 if (!quote) {
69 if (c == ';' || c == '#') {
70 comment = 1;
71 continue;
72 }
73 }
17712991
LT
74 if (space) {
75 if (len)
76 value[len++] = ' ';
77 space = 0;
78 }
79 if (c == '\\') {
80 c = get_next_char();
81 switch (c) {
82 case '\n':
83 continue;
84 case 't':
85 c = '\t';
86 break;
87 case 'b':
88 c = '\b';
89 break;
90 case 'n':
91 c = '\n';
92 break;
5cbb401d
LT
93 /* Some characters escape as themselves */
94 case '\\': case '"':
95 break;
96 /* Reject unknown escape sequences */
97 default:
98 return NULL;
17712991
LT
99 }
100 value[len++] = c;
101 continue;
102 }
103 if (c == '"') {
104 quote = 1-quote;
105 continue;
106 }
17712991
LT
107 value[len++] = c;
108 }
109}
110
38c5afa8
LT
111static inline int iskeychar(int c)
112{
113 return isalnum(c) || c == '-';
114}
115
ef90d6d4 116static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
117{
118 int c;
119 char *value;
120
121 /* Get the full name */
122 for (;;) {
123 c = get_next_char();
02e5ba4a 124 if (config_file_eof)
17712991 125 break;
38c5afa8 126 if (!iskeychar(c))
17712991
LT
127 break;
128 name[len++] = tolower(c);
129 if (len >= MAXNAME)
130 return -1;
131 }
132 name[len] = 0;
133 while (c == ' ' || c == '\t')
134 c = get_next_char();
135
136 value = NULL;
137 if (c != '\n') {
138 if (c != '=')
139 return -1;
140 value = parse_value();
141 if (!value)
142 return -1;
143 }
ef90d6d4 144 return fn(name, value, data);
17712991
LT
145}
146
d14f7764
LT
147static int get_extended_base_var(char *name, int baselen, int c)
148{
149 do {
150 if (c == '\n')
151 return -1;
152 c = get_next_char();
153 } while (isspace(c));
154
155 /* We require the format to be '[base "extension"]' */
156 if (c != '"')
157 return -1;
158 name[baselen++] = '.';
159
160 for (;;) {
161 int c = get_next_char();
162 if (c == '\n')
163 return -1;
164 if (c == '"')
165 break;
166 if (c == '\\') {
167 c = get_next_char();
168 if (c == '\n')
169 return -1;
170 }
171 name[baselen++] = c;
172 if (baselen > MAXNAME / 2)
173 return -1;
174 }
175
176 /* Final ']' */
177 if (get_next_char() != ']')
178 return -1;
179 return baselen;
180}
181
17712991
LT
182static int get_base_var(char *name)
183{
184 int baselen = 0;
185
186 for (;;) {
187 int c = get_next_char();
02e5ba4a 188 if (config_file_eof)
17712991
LT
189 return -1;
190 if (c == ']')
191 return baselen;
d14f7764
LT
192 if (isspace(c))
193 return get_extended_base_var(name, baselen, c);
38c5afa8 194 if (!iskeychar(c) && c != '.')
17712991
LT
195 return -1;
196 if (baselen > MAXNAME / 2)
197 return -1;
198 name[baselen++] = tolower(c);
199 }
200}
201
ef90d6d4 202static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
203{
204 int comment = 0;
205 int baselen = 0;
206 static char var[MAXNAME];
207
de056402
PB
208 /* U+FEFF Byte Order Mark in UTF8 */
209 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
210 const unsigned char *bomptr = utf8_bom;
211
17712991
LT
212 for (;;) {
213 int c = get_next_char();
de056402
PB
214 if (bomptr && *bomptr) {
215 /* We are at the file beginning; skip UTF8-encoded BOM
216 * if present. Sane editors won't put this in on their
217 * own, but e.g. Windows Notepad will do it happily. */
218 if ((unsigned char) c == *bomptr) {
219 bomptr++;
220 continue;
221 } else {
222 /* Do not tolerate partial BOM. */
223 if (bomptr != utf8_bom)
224 break;
225 /* No BOM at file beginning. Cool. */
226 bomptr = NULL;
227 }
228 }
17712991 229 if (c == '\n') {
02e5ba4a 230 if (config_file_eof)
17712991
LT
231 return 0;
232 comment = 0;
233 continue;
234 }
235 if (comment || isspace(c))
236 continue;
237 if (c == '#' || c == ';') {
238 comment = 1;
239 continue;
240 }
241 if (c == '[') {
242 baselen = get_base_var(var);
243 if (baselen <= 0)
244 break;
245 var[baselen++] = '.';
246 var[baselen] = 0;
247 continue;
248 }
249 if (!isalpha(c))
250 break;
128af9d1 251 var[baselen] = tolower(c);
ef90d6d4 252 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
253 break;
254 }
4f629539 255 die("bad config file line %d in %s", config_linenr, config_file_name);
17712991
LT
256}
257
c8deb5a1 258static int parse_unit_factor(const char *end, unsigned long *val)
0b87b6e0
BD
259{
260 if (!*end)
261 return 1;
c8deb5a1
SP
262 else if (!strcasecmp(end, "k")) {
263 *val *= 1024;
264 return 1;
265 }
266 else if (!strcasecmp(end, "m")) {
267 *val *= 1024 * 1024;
268 return 1;
269 }
270 else if (!strcasecmp(end, "g")) {
271 *val *= 1024 * 1024 * 1024;
272 return 1;
273 }
274 return 0;
0b87b6e0
BD
275}
276
0433bcd9 277static int git_parse_long(const char *value, long *ret)
0b87b6e0
BD
278{
279 if (value && *value) {
280 char *end;
281 long val = strtol(value, &end, 0);
c8deb5a1
SP
282 unsigned long factor = 1;
283 if (!parse_unit_factor(end, &factor))
284 return 0;
285 *ret = val * factor;
0b87b6e0
BD
286 return 1;
287 }
288 return 0;
289}
290
291int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
292{
293 if (value && *value) {
294 char *end;
0b87b6e0 295 unsigned long val = strtoul(value, &end, 0);
c8deb5a1
SP
296 if (!parse_unit_factor(end, &val))
297 return 0;
298 *ret = val;
0b87b6e0 299 return 1;
17712991 300 }
0b87b6e0
BD
301 return 0;
302}
303
c1867cea
JK
304static void die_bad_config(const char *name)
305{
306 if (config_file_name)
307 die("bad config value for '%s' in %s", name, config_file_name);
308 die("bad config value for '%s'", name);
309}
310
0b87b6e0
BD
311int git_config_int(const char *name, const char *value)
312{
0433bcd9 313 long ret = 0;
0b87b6e0 314 if (!git_parse_long(value, &ret))
c1867cea 315 die_bad_config(name);
0b87b6e0
BD
316 return ret;
317}
318
319unsigned long git_config_ulong(const char *name, const char *value)
320{
321 unsigned long ret;
322 if (!git_parse_ulong(value, &ret))
c1867cea 323 die_bad_config(name);
0b87b6e0 324 return ret;
17712991
LT
325}
326
a53f2ec6 327int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
17712991 328{
a53f2ec6 329 *is_bool = 1;
17712991
LT
330 if (!value)
331 return 1;
332 if (!*value)
333 return 0;
624314fd 334 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
17712991 335 return 1;
624314fd 336 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
17712991 337 return 0;
a53f2ec6 338 *is_bool = 0;
c35b0b58 339 return git_config_int(name, value);
17712991
LT
340}
341
a53f2ec6
JH
342int git_config_bool(const char *name, const char *value)
343{
344 int discard;
c35b0b58 345 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
346}
347
ea5105a5
CC
348int git_config_string(const char **dest, const char *var, const char *value)
349{
350 if (!value)
351 return config_error_nonbool(var);
352 *dest = xstrdup(value);
353 return 0;
354}
355
806e2ad7 356static int git_default_core_config(const char *var, const char *value)
17712991
LT
357{
358 /* This needs a better name */
359 if (!strcmp(var, "core.filemode")) {
360 trust_executable_bit = git_config_bool(var, value);
361 return 0;
362 }
1ce4790b
AR
363 if (!strcmp(var, "core.trustctime")) {
364 trust_ctime = git_config_bool(var, value);
365 return 0;
366 }
17712991 367
9378c161
JH
368 if (!strcmp(var, "core.quotepath")) {
369 quote_path_fully = git_config_bool(var, value);
370 return 0;
371 }
372
78a8d641
JS
373 if (!strcmp(var, "core.symlinks")) {
374 has_symlinks = git_config_bool(var, value);
375 return 0;
376 }
377
0a9b88b7
LT
378 if (!strcmp(var, "core.ignorecase")) {
379 ignore_case = git_config_bool(var, value);
380 return 0;
381 }
382
7d1864ce
JH
383 if (!strcmp(var, "core.bare")) {
384 is_bare_repository_cfg = git_config_bool(var, value);
385 return 0;
386 }
387
5f73076c
JH
388 if (!strcmp(var, "core.ignorestat")) {
389 assume_unchanged = git_config_bool(var, value);
390 return 0;
391 }
392
e388c738
JH
393 if (!strcmp(var, "core.prefersymlinkrefs")) {
394 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
395 return 0;
396 }
397
6de08ae6
SP
398 if (!strcmp(var, "core.logallrefupdates")) {
399 log_all_ref_updates = git_config_bool(var, value);
400 return 0;
401 }
402
2f8acdb3
JH
403 if (!strcmp(var, "core.warnambiguousrefs")) {
404 warn_ambiguous_refs = git_config_bool(var, value);
405 return 0;
406 }
407
960ccca6 408 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
409 int level = git_config_int(var, value);
410 if (level == -1)
411 level = Z_DEFAULT_COMPRESSION;
412 else if (level < 0 || level > Z_BEST_COMPRESSION)
413 die("bad zlib compression level %d", level);
414 zlib_compression_level = level;
960ccca6
DH
415 zlib_compression_seen = 1;
416 return 0;
417 }
418
419 if (!strcmp(var, "core.compression")) {
420 int level = git_config_int(var, value);
421 if (level == -1)
422 level = Z_DEFAULT_COMPRESSION;
423 else if (level < 0 || level > Z_BEST_COMPRESSION)
424 die("bad zlib compression level %d", level);
425 core_compression_level = level;
426 core_compression_seen = 1;
427 if (!zlib_compression_seen)
428 zlib_compression_level = level;
12f6c308
JBH
429 return 0;
430 }
431
60bb8b14 432 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 433 int pgsz_x2 = getpagesize() * 2;
60bb8b14 434 packed_git_window_size = git_config_int(var, value);
5faaf246
JH
435
436 /* This value must be multiple of (pagesize * 2) */
437 packed_git_window_size /= pgsz_x2;
438 if (packed_git_window_size < 1)
439 packed_git_window_size = 1;
440 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
441 return 0;
442 }
443
77ccc5bb
SP
444 if (!strcmp(var, "core.packedgitlimit")) {
445 packed_git_limit = git_config_int(var, value);
446 return 0;
447 }
448
18bdec11
SP
449 if (!strcmp(var, "core.deltabasecachelimit")) {
450 delta_base_cache_limit = git_config_int(var, value);
451 return 0;
452 }
453
6c510bee 454 if (!strcmp(var, "core.autocrlf")) {
d7f46334
LT
455 if (value && !strcasecmp(value, "input")) {
456 auto_crlf = -1;
457 return 0;
458 }
6c510bee
LT
459 auto_crlf = git_config_bool(var, value);
460 return 0;
461 }
462
21e5ad50
SP
463 if (!strcmp(var, "core.safecrlf")) {
464 if (value && !strcasecmp(value, "warn")) {
465 safe_crlf = SAFE_CRLF_WARN;
466 return 0;
467 }
468 safe_crlf = git_config_bool(var, value);
469 return 0;
470 }
471
806e2ad7
LT
472 if (!strcmp(var, "core.pager"))
473 return git_config_string(&pager_program, var, value);
474
475 if (!strcmp(var, "core.editor"))
476 return git_config_string(&editor_program, var, value);
477
478 if (!strcmp(var, "core.excludesfile"))
479 return git_config_string(&excludes_file, var, value);
480
481 if (!strcmp(var, "core.whitespace")) {
482 if (!value)
483 return config_error_nonbool(var);
484 whitespace_rule_cfg = parse_whitespace_rule(value);
485 return 0;
486 }
487
aafe9fba
LT
488 if (!strcmp(var, "core.fsyncobjectfiles")) {
489 fsync_object_files = git_config_bool(var, value);
490 return 0;
491 }
492
671c9b7e
LT
493 if (!strcmp(var, "core.preloadindex")) {
494 core_preload_index = git_config_bool(var, value);
495 return 0;
496 }
497
806e2ad7
LT
498 /* Add other config variables here and to Documentation/config.txt. */
499 return 0;
500}
501
d1364529 502static int git_default_user_config(const char *var, const char *value)
806e2ad7 503{
e1b10391 504 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
505 if (!value)
506 return config_error_nonbool(var);
817151e6 507 strlcpy(git_default_name, value, sizeof(git_default_name));
bb1ae3f6
SB
508 if (git_default_email[0])
509 user_ident_explicitly_given = 1;
e1b10391
LT
510 return 0;
511 }
512
513 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
514 if (!value)
515 return config_error_nonbool(var);
817151e6 516 strlcpy(git_default_email, value, sizeof(git_default_email));
bb1ae3f6
SB
517 if (git_default_name[0])
518 user_ident_explicitly_given = 1;
e1b10391
LT
519 return 0;
520 }
521
d1364529
LT
522 /* Add other config variables here and to Documentation/config.txt. */
523 return 0;
524}
525
1141f492 526static int git_default_i18n_config(const char *var, const char *value)
d1364529 527{
ea5105a5
CC
528 if (!strcmp(var, "i18n.commitencoding"))
529 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 530
ea5105a5
CC
531 if (!strcmp(var, "i18n.logoutputencoding"))
532 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 533
1141f492
LT
534 /* Add other config variables here and to Documentation/config.txt. */
535 return 0;
536}
039bc64e 537
1141f492
LT
538static int git_default_branch_config(const char *var, const char *value)
539{
9ed36cfa
JS
540 if (!strcmp(var, "branch.autosetupmerge")) {
541 if (value && !strcasecmp(value, "always")) {
542 git_branch_track = BRANCH_TRACK_ALWAYS;
543 return 0;
544 }
545 git_branch_track = git_config_bool(var, value);
546 return 0;
547 }
c998ae9b
DS
548 if (!strcmp(var, "branch.autosetuprebase")) {
549 if (!value)
550 return config_error_nonbool(var);
551 else if (!strcmp(value, "never"))
552 autorebase = AUTOREBASE_NEVER;
553 else if (!strcmp(value, "local"))
554 autorebase = AUTOREBASE_LOCAL;
555 else if (!strcmp(value, "remote"))
556 autorebase = AUTOREBASE_REMOTE;
557 else if (!strcmp(value, "always"))
558 autorebase = AUTOREBASE_ALWAYS;
559 else
560 return error("Malformed value for %s", var);
561 return 0;
562 }
a9cc857a 563
1ab661dd 564 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
565 return 0;
566}
567
d551a488
MSO
568static int git_default_mailmap_config(const char *var, const char *value)
569{
570 if (!strcmp(var, "mailmap.file"))
571 return git_config_string(&git_mailmap_file, var, value);
572
573 /* Add other config variables here and to Documentation/config.txt. */
574 return 0;
575}
576
1141f492
LT
577int git_default_config(const char *var, const char *value, void *dummy)
578{
579 if (!prefixcmp(var, "core."))
580 return git_default_core_config(var, value);
581
582 if (!prefixcmp(var, "user."))
583 return git_default_user_config(var, value);
584
585 if (!prefixcmp(var, "i18n."))
586 return git_default_i18n_config(var, value);
587
588 if (!prefixcmp(var, "branch."))
589 return git_default_branch_config(var, value);
590
d551a488
MSO
591 if (!prefixcmp(var, "mailmap."))
592 return git_default_mailmap_config(var, value);
593
1141f492
LT
594 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
595 pager_use_color = git_config_bool(var,value);
596 return 0;
597 }
598
599 /* Add other config variables here and to Documentation/config.txt. */
600 return 0;
601}
602
ef90d6d4 603int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
604{
605 int ret;
4f629539 606 FILE *f = fopen(filename, "r");
17712991
LT
607
608 ret = -1;
609 if (f) {
610 config_file = f;
4f629539 611 config_file_name = filename;
17712991 612 config_linenr = 1;
02e5ba4a 613 config_file_eof = 0;
ef90d6d4 614 ret = git_parse_file(fn, data);
17712991 615 fclose(f);
4f629539 616 config_file_name = NULL;
17712991
LT
617 }
618 return ret;
619}
10bea152 620
506b17b1
JS
621const char *git_etc_gitconfig(void)
622{
7f0e39fa 623 static const char *system_wide;
2de9de5e
SP
624 if (!system_wide)
625 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 626 return system_wide;
506b17b1
JS
627}
628
e4bffb5a 629static int git_env_bool(const char *k, int def)
ab88c363
JK
630{
631 const char *v = getenv(k);
632 return v ? git_config_bool(k, v) : def;
633}
634
635int git_config_system(void)
636{
637 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
638}
639
640int git_config_global(void)
641{
642 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
643}
644
ef90d6d4 645int git_config(config_fn_t fn, void *data)
4f629539 646{
5f1a63e0
JS
647 int ret = 0;
648 char *repo_config = NULL;
dc871831 649 const char *home = NULL;
5f1a63e0 650
8befc50c 651 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
dc871831
DB
652 if (config_exclusive_filename)
653 return git_config_from_file(fn, config_exclusive_filename, data);
654 if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
655 ret += git_config_from_file(fn, git_etc_gitconfig(),
656 data);
5f1a63e0 657
dc871831 658 home = getenv("HOME");
ab88c363 659 if (git_config_global() && home) {
9befac47 660 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
e33d0611 661 if (!access(user_config, R_OK))
dc871831 662 ret += git_config_from_file(fn, user_config, data);
5f1a63e0
JS
663 free(user_config);
664 }
665
a4f34cbb 666 repo_config = git_pathdup("config");
dc871831 667 ret += git_config_from_file(fn, repo_config, data);
4cac42b1 668 free(repo_config);
5f1a63e0 669 return ret;
4f629539
JH
670}
671
10bea152
JS
672/*
673 * Find all the stuff for git_config_set() below.
674 */
4ddba79d
JS
675
676#define MAX_MATCHES 512
677
10bea152
JS
678static struct {
679 int baselen;
680 char* key;
f98d863d 681 int do_not_match;
10bea152 682 regex_t* value_regex;
4ddba79d 683 int multi_replace;
dc49cd76 684 size_t offset[MAX_MATCHES];
10bea152
JS
685 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
686 int seen;
687} store;
688
f98d863d
JS
689static int matches(const char* key, const char* value)
690{
691 return !strcmp(key, store.key) &&
692 (store.value_regex == NULL ||
693 (store.do_not_match ^
694 !regexec(store.value_regex, value, 0, NULL, 0)));
695}
696
ef90d6d4 697static int store_aux(const char* key, const char* value, void *cb)
10bea152 698{
ae9ee41d
JH
699 const char *ep;
700 size_t section_len;
701
10bea152
JS
702 switch (store.state) {
703 case KEY_SEEN:
f98d863d 704 if (matches(key, value)) {
4ddba79d 705 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 706 warning("%s has multiple values", key);
4ddba79d 707 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 708 error("too many matches for %s", key);
4ddba79d 709 return 1;
10bea152 710 }
4ddba79d
JS
711
712 store.offset[store.seen] = ftell(config_file);
10bea152
JS
713 store.seen++;
714 }
715 break;
716 case SECTION_SEEN:
ae9ee41d
JH
717 /*
718 * What we are looking for is in store.key (both
719 * section and var), and its section part is baselen
720 * long. We found key (again, both section and var).
721 * We would want to know if this key is in the same
722 * section as what we are looking for. We already
723 * know we are in the same section as what should
724 * hold store.key.
725 */
726 ep = strrchr(key, '.');
727 section_len = ep - key;
728
729 if ((section_len != store.baselen) ||
730 memcmp(key, store.key, section_len+1)) {
10bea152
JS
731 store.state = SECTION_END_SEEN;
732 break;
ae9ee41d
JH
733 }
734
735 /*
736 * Do not increment matches: this is no match, but we
737 * just made sure we are in the desired section.
738 */
739 store.offset[store.seen] = ftell(config_file);
10bea152
JS
740 /* fallthru */
741 case SECTION_END_SEEN:
742 case START:
f98d863d 743 if (matches(key, value)) {
4ddba79d 744 store.offset[store.seen] = ftell(config_file);
10bea152
JS
745 store.state = KEY_SEEN;
746 store.seen++;
d14f7764
LT
747 } else {
748 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 749 !strncmp(key, store.key, store.baselen)) {
93ddef3e 750 store.state = SECTION_SEEN;
bdf0ef08 751 store.offset[store.seen] = ftell(config_file);
d14f7764 752 }
bdf0ef08 753 }
10bea152
JS
754 }
755 return 0;
756}
757
64c0d71c 758static int write_error(const char *filename)
480c9e52 759{
64c0d71c 760 error("failed to write new configuration file %s", filename);
480c9e52
AW
761
762 /* Same error code as "failed to rename". */
763 return 4;
764}
765
766static int store_write_section(int fd, const char* key)
10bea152 767{
cb891a59
KH
768 const char *dot;
769 int i, success;
f285a2d7 770 struct strbuf sb = STRBUF_INIT;
d14f7764 771
cb891a59 772 dot = memchr(key, '.', store.baselen);
d14f7764 773 if (dot) {
cb891a59
KH
774 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
775 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 776 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
777 strbuf_addch(&sb, '\\');
778 strbuf_addch(&sb, key[i]);
d14f7764 779 }
cb891a59
KH
780 strbuf_addstr(&sb, "\"]\n");
781 } else {
782 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
783 }
784
cb891a59
KH
785 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
786 strbuf_release(&sb);
480c9e52 787
cb891a59 788 return success;
10bea152
JS
789}
790
480c9e52 791static int store_write_pair(int fd, const char* key, const char* value)
10bea152 792{
cb891a59
KH
793 int i, success;
794 int length = strlen(key + store.baselen + 1);
795 const char *quote = "";
f285a2d7 796 struct strbuf sb = STRBUF_INIT;
cdd4fb15 797
6281f394
JM
798 /*
799 * Check to see if the value needs to be surrounded with a dq pair.
800 * Note that problematic characters are always backslash-quoted; this
801 * check is about not losing leading or trailing SP and strings that
802 * follow beginning-of-comment characters (i.e. ';' and '#') by the
803 * configuration parser.
804 */
cdd4fb15 805 if (value[0] == ' ')
cb891a59 806 quote = "\"";
cdd4fb15
BG
807 for (i = 0; value[i]; i++)
808 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
809 quote = "\"";
810 if (i && value[i - 1] == ' ')
811 quote = "\"";
812
cb891a59
KH
813 strbuf_addf(&sb, "\t%.*s = %s",
814 length, key + store.baselen + 1, quote);
10bea152 815
10bea152
JS
816 for (i = 0; value[i]; i++)
817 switch (value[i]) {
480c9e52 818 case '\n':
cb891a59 819 strbuf_addstr(&sb, "\\n");
480c9e52
AW
820 break;
821 case '\t':
cb891a59 822 strbuf_addstr(&sb, "\\t");
480c9e52
AW
823 break;
824 case '"':
825 case '\\':
cb891a59 826 strbuf_addch(&sb, '\\');
480c9e52 827 default:
cb891a59 828 strbuf_addch(&sb, value[i]);
480c9e52
AW
829 break;
830 }
cb891a59
KH
831 strbuf_addf(&sb, "%s\n", quote);
832
833 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
834 strbuf_release(&sb);
835
836 return success;
10bea152
JS
837}
838
dc49cd76
SP
839static ssize_t find_beginning_of_line(const char* contents, size_t size,
840 size_t offset_, int* found_bracket)
4ddba79d 841{
dc49cd76
SP
842 size_t equal_offset = size, bracket_offset = size;
843 ssize_t offset;
4ddba79d 844
7a31cc0f 845contline:
a6080a0a 846 for (offset = offset_-2; offset > 0
4ddba79d
JS
847 && contents[offset] != '\n'; offset--)
848 switch (contents[offset]) {
849 case '=': equal_offset = offset; break;
850 case ']': bracket_offset = offset; break;
851 }
7a31cc0f
FL
852 if (offset > 0 && contents[offset-1] == '\\') {
853 offset_ = offset;
854 goto contline;
855 }
4ddba79d
JS
856 if (bracket_offset < equal_offset) {
857 *found_bracket = 1;
858 offset = bracket_offset+1;
859 } else
860 offset++;
861
862 return offset;
863}
864
10bea152
JS
865int git_config_set(const char* key, const char* value)
866{
4ddba79d 867 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
868}
869
870/*
871 * If value==NULL, unset in (remove from) config,
872 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
873 * if multi_replace==0, nothing, or only one matching key/value is replaced,
874 * else all matching key/values (regardless how many) are removed,
875 * before the new pair is written.
10bea152
JS
876 *
877 * Returns 0 on success.
878 *
879 * This function does this:
880 *
881 * - it locks the config file by creating ".git/config.lock"
882 *
883 * - it then parses the config using store_aux() as validator to find
884 * the position on the key/value pair to replace. If it is to be unset,
885 * it must be found exactly once.
886 *
887 * - the config file is mmap()ed and the part before the match (if any) is
888 * written to the lock file, then the changed part and the rest.
889 *
890 * - the config file is removed and the lock file rename()d to it.
891 *
892 */
893int git_config_set_multivar(const char* key, const char* value,
4ddba79d 894 const char* value_regex, int multi_replace)
10bea152 895{
d14f7764 896 int i, dot;
f8ba655e 897 int fd = -1, in_fd;
dafc88b1 898 int ret;
9c3796fc 899 char* config_filename;
6cbf973c 900 struct lock_file *lock = NULL;
b17e659d 901 const char* last_dot = strrchr(key, '.');
4ddba79d 902
dc871831
DB
903 if (config_exclusive_filename)
904 config_filename = xstrdup(config_exclusive_filename);
905 else
a4f34cbb 906 config_filename = git_pathdup("config");
9c3796fc 907
10bea152
JS
908 /*
909 * Since "key" actually contains the section name and the real
910 * key name separated by a dot, we have to know where the dot is.
911 */
b17e659d 912
dafc88b1 913 if (last_dot == NULL) {
64c0d71c 914 error("key does not contain a section: %s", key);
dafc88b1
SH
915 ret = 2;
916 goto out_free;
10bea152 917 }
b17e659d
JS
918 store.baselen = last_dot - key;
919
920 store.multi_replace = multi_replace;
10bea152
JS
921
922 /*
923 * Validate the key and while at it, lower case it for matching.
924 */
2d7320d0 925 store.key = xmalloc(strlen(key) + 1);
d14f7764
LT
926 dot = 0;
927 for (i = 0; key[i]; i++) {
928 unsigned char c = key[i];
929 if (c == '.')
930 dot = 1;
931 /* Leave the extended basename untouched.. */
932 if (!dot || i > store.baselen) {
38c5afa8 933 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
64c0d71c 934 error("invalid key: %s", key);
d14f7764
LT
935 free(store.key);
936 ret = 1;
937 goto out_free;
938 }
939 c = tolower(c);
6f71686e 940 } else if (c == '\n') {
64c0d71c 941 error("invalid key (newline): %s", key);
6f71686e
JS
942 free(store.key);
943 ret = 1;
944 goto out_free;
d14f7764
LT
945 }
946 store.key[i] = c;
947 }
3dd94e3b 948 store.key[i] = 0;
10bea152
JS
949
950 /*
6cbf973c 951 * The lock serves a purpose in addition to locking: the new
10bea152
JS
952 * contents of .git/config will be written into it.
953 */
6cbf973c
BS
954 lock = xcalloc(sizeof(struct lock_file), 1);
955 fd = hold_lock_file_for_update(lock, config_filename, 0);
956 if (fd < 0) {
e88d022a 957 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 958 free(store.key);
dafc88b1
SH
959 ret = -1;
960 goto out_free;
10bea152
JS
961 }
962
963 /*
964 * If .git/config does not exist yet, write a minimal version.
965 */
88fb958b
AR
966 in_fd = open(config_filename, O_RDONLY);
967 if ( in_fd < 0 ) {
10bea152
JS
968 free(store.key);
969
88fb958b
AR
970 if ( ENOENT != errno ) {
971 error("opening %s: %s", config_filename,
972 strerror(errno));
dafc88b1
SH
973 ret = 3; /* same as "invalid config file" */
974 goto out_free;
88fb958b 975 }
10bea152
JS
976 /* if nothing to unset, error out */
977 if (value == NULL) {
dafc88b1
SH
978 ret = 5;
979 goto out_free;
10bea152
JS
980 }
981
982 store.key = (char*)key;
480c9e52 983 if (!store_write_section(fd, key) ||
93c1e079
JH
984 !store_write_pair(fd, key, value))
985 goto write_err_out;
986 } else {
88fb958b 987 struct stat st;
10bea152 988 char* contents;
dc49cd76
SP
989 size_t contents_sz, copy_begin, copy_end;
990 int i, new_line = 0;
10bea152
JS
991
992 if (value_regex == NULL)
993 store.value_regex = NULL;
994 else {
f98d863d
JS
995 if (value_regex[0] == '!') {
996 store.do_not_match = 1;
997 value_regex++;
998 } else
999 store.do_not_match = 0;
1000
2d7320d0 1001 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1002 if (regcomp(store.value_regex, value_regex,
1003 REG_EXTENDED)) {
64c0d71c 1004 error("invalid pattern: %s", value_regex);
10bea152 1005 free(store.value_regex);
dafc88b1
SH
1006 ret = 6;
1007 goto out_free;
10bea152
JS
1008 }
1009 }
1010
4ddba79d 1011 store.offset[0] = 0;
10bea152
JS
1012 store.state = START;
1013 store.seen = 0;
1014
1015 /*
1016 * After this, store.offset will contain the *end* offset
1017 * of the last match, or remain at 0 if no match was found.
1018 * As a side effect, we make sure to transform only a valid
1019 * existing config file.
1020 */
ef90d6d4 1021 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1022 error("invalid config file %s", config_filename);
10bea152
JS
1023 free(store.key);
1024 if (store.value_regex != NULL) {
1025 regfree(store.value_regex);
1026 free(store.value_regex);
1027 }
dafc88b1
SH
1028 ret = 3;
1029 goto out_free;
10bea152
JS
1030 }
1031
1032 free(store.key);
1033 if (store.value_regex != NULL) {
1034 regfree(store.value_regex);
1035 free(store.value_regex);
1036 }
1037
4ddba79d
JS
1038 /* if nothing to unset, or too many matches, error out */
1039 if ((store.seen == 0 && value == NULL) ||
1040 (store.seen > 1 && multi_replace == 0)) {
dafc88b1
SH
1041 ret = 5;
1042 goto out_free;
10bea152
JS
1043 }
1044
88fb958b 1045 fstat(in_fd, &st);
dc49cd76
SP
1046 contents_sz = xsize_t(st.st_size);
1047 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1048 MAP_PRIVATE, in_fd, 0);
1049 close(in_fd);
1050
4ddba79d
JS
1051 if (store.seen == 0)
1052 store.seen = 1;
1053
1054 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1055 if (store.offset[i] == 0) {
dc49cd76 1056 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1057 } else if (store.state != KEY_SEEN) {
1058 copy_end = store.offset[i];
10bea152 1059 } else
4ddba79d 1060 copy_end = find_beginning_of_line(
dc49cd76 1061 contents, contents_sz,
4ddba79d
JS
1062 store.offset[i]-2, &new_line);
1063
02e5ba4a
JK
1064 if (copy_end > 0 && contents[copy_end-1] != '\n')
1065 new_line = 1;
1066
4ddba79d
JS
1067 /* write the first part of the config */
1068 if (copy_end > copy_begin) {
93c1e079
JH
1069 if (write_in_full(fd, contents + copy_begin,
1070 copy_end - copy_begin) <
1071 copy_end - copy_begin)
1072 goto write_err_out;
1073 if (new_line &&
1074 write_in_full(fd, "\n", 1) != 1)
1075 goto write_err_out;
4ddba79d
JS
1076 }
1077 copy_begin = store.offset[i];
10bea152
JS
1078 }
1079
10bea152
JS
1080 /* write the pair (value == NULL means unset) */
1081 if (value != NULL) {
93c1e079
JH
1082 if (store.state == START) {
1083 if (!store_write_section(fd, key))
1084 goto write_err_out;
480c9e52 1085 }
93c1e079
JH
1086 if (!store_write_pair(fd, key, value))
1087 goto write_err_out;
10bea152
JS
1088 }
1089
1090 /* write the rest of the config */
dc49cd76 1091 if (copy_begin < contents_sz)
93c1e079 1092 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1093 contents_sz - copy_begin) <
1094 contents_sz - copy_begin)
93c1e079 1095 goto write_err_out;
10bea152 1096
dc49cd76 1097 munmap(contents, contents_sz);
10bea152
JS
1098 }
1099
4ed7cd3a 1100 if (commit_lock_file(lock) < 0) {
64c0d71c 1101 error("could not commit config file %s", config_filename);
dafc88b1
SH
1102 ret = 4;
1103 goto out_free;
10bea152
JS
1104 }
1105
6cbf973c
BS
1106 /*
1107 * lock is committed, so don't try to roll it back below.
1108 * NOTE: Since lockfile.c keeps a linked list of all created
1109 * lock_file structures, it isn't safe to free(lock). It's
1110 * better to just leave it hanging around.
1111 */
1112 lock = NULL;
dafc88b1
SH
1113 ret = 0;
1114
1115out_free:
6cbf973c
BS
1116 if (lock)
1117 rollback_lock_file(lock);
4cac42b1 1118 free(config_filename);
dafc88b1 1119 return ret;
93c1e079
JH
1120
1121write_err_out:
64c0d71c 1122 ret = write_error(lock->filename);
93c1e079
JH
1123 goto out_free;
1124
10bea152
JS
1125}
1126
118f8b24
PB
1127static int section_name_match (const char *buf, const char *name)
1128{
1129 int i = 0, j = 0, dot = 0;
1130 for (; buf[i] && buf[i] != ']'; i++) {
1131 if (!dot && isspace(buf[i])) {
1132 dot = 1;
1133 if (name[j++] != '.')
1134 break;
1135 for (i++; isspace(buf[i]); i++)
1136 ; /* do nothing */
1137 if (buf[i] != '"')
1138 break;
1139 continue;
1140 }
1141 if (buf[i] == '\\' && dot)
1142 i++;
1143 else if (buf[i] == '"' && dot) {
1144 for (i++; isspace(buf[i]); i++)
1145 ; /* do_nothing */
1146 break;
1147 }
1148 if (buf[i] != name[j++])
1149 break;
1150 }
1151 return (buf[i] == ']' && name[j] == 0);
1152}
1153
1154/* if new_name == NULL, the section is removed instead */
0667fcfb
JS
1155int git_config_rename_section(const char *old_name, const char *new_name)
1156{
118f8b24 1157 int ret = 0, remove = 0;
fc1905bb 1158 char *config_filename;
0667fcfb
JS
1159 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1160 int out_fd;
1161 char buf[1024];
1162
dc871831
DB
1163 if (config_exclusive_filename)
1164 config_filename = xstrdup(config_exclusive_filename);
1165 else
a4f34cbb 1166 config_filename = git_pathdup("config");
0667fcfb 1167 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1168 if (out_fd < 0) {
64c0d71c 1169 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1170 goto out;
1171 }
0667fcfb 1172
fc1905bb 1173 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1174 /* no config file means nothing to rename, no error */
1175 goto unlock_and_out;
fc1905bb 1176 }
0667fcfb
JS
1177
1178 while (fgets(buf, sizeof(buf), config_file)) {
1179 int i;
480c9e52 1180 int length;
0667fcfb
JS
1181 for (i = 0; buf[i] && isspace(buf[i]); i++)
1182 ; /* do nothing */
1183 if (buf[i] == '[') {
1184 /* it's a section */
118f8b24
PB
1185 if (section_name_match (&buf[i+1], old_name)) {
1186 ret++;
1187 if (new_name == NULL) {
1188 remove = 1;
0667fcfb
JS
1189 continue;
1190 }
0667fcfb 1191 store.baselen = strlen(new_name);
480c9e52 1192 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1193 ret = write_error(lock->filename);
480c9e52
AW
1194 goto out;
1195 }
0667fcfb
JS
1196 continue;
1197 }
118f8b24 1198 remove = 0;
0667fcfb 1199 }
118f8b24
PB
1200 if (remove)
1201 continue;
480c9e52
AW
1202 length = strlen(buf);
1203 if (write_in_full(out_fd, buf, length) != length) {
64c0d71c 1204 ret = write_error(lock->filename);
480c9e52
AW
1205 goto out;
1206 }
0667fcfb 1207 }
fc1905bb 1208 fclose(config_file);
01ebb9dc 1209 unlock_and_out:
4ed7cd3a 1210 if (commit_lock_file(lock) < 0)
64c0d71c 1211 ret = error("could not commit config file %s", config_filename);
fc1905bb
JH
1212 out:
1213 free(config_filename);
0667fcfb
JS
1214 return ret;
1215}
40ea4ed9
JH
1216
1217/*
1218 * Call this to report error for your variable that should not
1219 * get a boolean value (i.e. "[my] var" means "true").
1220 */
1221int config_error_nonbool(const char *var)
1222{
1223 return error("Missing value for '%s'", var);
1224}