advice: Introduce error_resolve_conflict
[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"
572e4f6a 10#include "strbuf.h"
2b64fc89 11#include "quote.h"
17712991
LT
12
13#define MAXNAME (256)
14
15static FILE *config_file;
0dccc7dc 16static const char *config_file_name;
17712991 17static int config_linenr;
02e5ba4a 18static int config_file_eof;
960ccca6
DH
19static int zlib_compression_seen;
20
dc871831
DB
21const char *config_exclusive_filename = NULL;
22
8b1fa778
AR
23static void lowercase(char *p)
24{
25 for (; *p; p++)
26 *p = tolower(*p);
27}
8b1fa778 28
2b64fc89
JK
29void git_config_push_parameter(const char *text)
30{
31 struct strbuf env = STRBUF_INIT;
32 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
33 if (old) {
34 strbuf_addstr(&env, old);
35 strbuf_addch(&env, ' ');
36 }
37 sq_quote_buf(&env, text);
38 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
39 strbuf_release(&env);
40}
41
06eb708f
JK
42static int git_config_parse_parameter(const char *text,
43 config_fn_t fn, void *data)
8b1fa778 44{
572e4f6a
AR
45 struct strbuf tmp = STRBUF_INIT;
46 struct strbuf **pair;
47 strbuf_addstr(&tmp, text);
48 pair = strbuf_split(&tmp, '=');
49 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
50 strbuf_setlen(pair[0], pair[0]->len - 1);
51 strbuf_trim(pair[0]);
52 if (!pair[0]->len) {
53 strbuf_list_free(pair);
06eb708f 54 return error("bogus config parameter: %s", text);
8b1fa778 55 }
06eb708f
JK
56 lowercase(pair[0]->buf);
57 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
58 strbuf_list_free(pair);
59 return -1;
572e4f6a
AR
60 }
61 strbuf_list_free(pair);
8b1fa778
AR
62 return 0;
63}
64
06eb708f
JK
65int git_config_from_parameters(config_fn_t fn, void *data)
66{
2b64fc89
JK
67 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
68 char *envw;
69 const char **argv = NULL;
70 int nr = 0, alloc = 0;
71 int i;
72
73 if (!env)
74 return 0;
75 /* sq_dequote will write over it */
76 envw = xstrdup(env);
77
78 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
79 free(envw);
80 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
81 }
82
83 for (i = 0; i < nr; i++) {
06eb708f 84 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
85 free(argv);
86 free(envw);
87 return -1;
88 }
89 }
90
91 free(argv);
92 free(envw);
06eb708f 93 return nr > 0;
2b64fc89
JK
94}
95
17712991
LT
96static int get_next_char(void)
97{
98 int c;
99 FILE *f;
100
101 c = '\n';
102 if ((f = config_file) != NULL) {
103 c = fgetc(f);
db2c075d
JH
104 if (c == '\r') {
105 /* DOS like systems */
106 c = fgetc(f);
107 if (c != '\n') {
108 ungetc(c, f);
109 c = '\r';
110 }
111 }
17712991
LT
112 if (c == '\n')
113 config_linenr++;
114 if (c == EOF) {
02e5ba4a 115 config_file_eof = 1;
17712991
LT
116 c = '\n';
117 }
118 }
119 return c;
120}
121
122static char *parse_value(void)
123{
e96c19c5
EFL
124 static struct strbuf value = STRBUF_INIT;
125 int quote = 0, comment = 0, space = 0;
17712991 126
e96c19c5 127 strbuf_reset(&value);
17712991
LT
128 for (;;) {
129 int c = get_next_char();
17712991
LT
130 if (c == '\n') {
131 if (quote)
132 return NULL;
e96c19c5 133 return value.buf;
17712991
LT
134 }
135 if (comment)
136 continue;
137 if (isspace(c) && !quote) {
e96c19c5 138 if (value.len)
ebdaae37 139 space++;
17712991
LT
140 continue;
141 }
7ebdba61
JS
142 if (!quote) {
143 if (c == ';' || c == '#') {
144 comment = 1;
145 continue;
146 }
147 }
ebdaae37 148 for (; space; space--)
e96c19c5 149 strbuf_addch(&value, ' ');
17712991
LT
150 if (c == '\\') {
151 c = get_next_char();
152 switch (c) {
153 case '\n':
154 continue;
155 case 't':
156 c = '\t';
157 break;
158 case 'b':
159 c = '\b';
160 break;
161 case 'n':
162 c = '\n';
163 break;
5cbb401d
LT
164 /* Some characters escape as themselves */
165 case '\\': case '"':
166 break;
167 /* Reject unknown escape sequences */
168 default:
169 return NULL;
17712991 170 }
e96c19c5 171 strbuf_addch(&value, c);
17712991
LT
172 continue;
173 }
174 if (c == '"') {
175 quote = 1-quote;
176 continue;
177 }
e96c19c5 178 strbuf_addch(&value, c);
17712991
LT
179 }
180}
181
38c5afa8
LT
182static inline int iskeychar(int c)
183{
184 return isalnum(c) || c == '-';
185}
186
ef90d6d4 187static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
188{
189 int c;
190 char *value;
191
192 /* Get the full name */
193 for (;;) {
194 c = get_next_char();
02e5ba4a 195 if (config_file_eof)
17712991 196 break;
38c5afa8 197 if (!iskeychar(c))
17712991
LT
198 break;
199 name[len++] = tolower(c);
200 if (len >= MAXNAME)
201 return -1;
202 }
203 name[len] = 0;
204 while (c == ' ' || c == '\t')
205 c = get_next_char();
206
207 value = NULL;
208 if (c != '\n') {
209 if (c != '=')
210 return -1;
211 value = parse_value();
212 if (!value)
213 return -1;
214 }
ef90d6d4 215 return fn(name, value, data);
17712991
LT
216}
217
d14f7764
LT
218static int get_extended_base_var(char *name, int baselen, int c)
219{
220 do {
221 if (c == '\n')
222 return -1;
223 c = get_next_char();
224 } while (isspace(c));
225
226 /* We require the format to be '[base "extension"]' */
227 if (c != '"')
228 return -1;
229 name[baselen++] = '.';
230
231 for (;;) {
232 int c = get_next_char();
233 if (c == '\n')
234 return -1;
235 if (c == '"')
236 break;
237 if (c == '\\') {
238 c = get_next_char();
239 if (c == '\n')
240 return -1;
241 }
242 name[baselen++] = c;
243 if (baselen > MAXNAME / 2)
244 return -1;
245 }
246
247 /* Final ']' */
248 if (get_next_char() != ']')
249 return -1;
250 return baselen;
251}
252
17712991
LT
253static int get_base_var(char *name)
254{
255 int baselen = 0;
256
257 for (;;) {
258 int c = get_next_char();
02e5ba4a 259 if (config_file_eof)
17712991
LT
260 return -1;
261 if (c == ']')
262 return baselen;
d14f7764
LT
263 if (isspace(c))
264 return get_extended_base_var(name, baselen, c);
38c5afa8 265 if (!iskeychar(c) && c != '.')
17712991
LT
266 return -1;
267 if (baselen > MAXNAME / 2)
268 return -1;
269 name[baselen++] = tolower(c);
270 }
271}
272
ef90d6d4 273static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
274{
275 int comment = 0;
276 int baselen = 0;
277 static char var[MAXNAME];
278
de056402
PB
279 /* U+FEFF Byte Order Mark in UTF8 */
280 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
281 const unsigned char *bomptr = utf8_bom;
282
17712991
LT
283 for (;;) {
284 int c = get_next_char();
de056402
PB
285 if (bomptr && *bomptr) {
286 /* We are at the file beginning; skip UTF8-encoded BOM
287 * if present. Sane editors won't put this in on their
288 * own, but e.g. Windows Notepad will do it happily. */
289 if ((unsigned char) c == *bomptr) {
290 bomptr++;
291 continue;
292 } else {
293 /* Do not tolerate partial BOM. */
294 if (bomptr != utf8_bom)
295 break;
296 /* No BOM at file beginning. Cool. */
297 bomptr = NULL;
298 }
299 }
17712991 300 if (c == '\n') {
02e5ba4a 301 if (config_file_eof)
17712991
LT
302 return 0;
303 comment = 0;
304 continue;
305 }
306 if (comment || isspace(c))
307 continue;
308 if (c == '#' || c == ';') {
309 comment = 1;
310 continue;
311 }
312 if (c == '[') {
313 baselen = get_base_var(var);
314 if (baselen <= 0)
315 break;
316 var[baselen++] = '.';
317 var[baselen] = 0;
318 continue;
319 }
320 if (!isalpha(c))
321 break;
128af9d1 322 var[baselen] = tolower(c);
ef90d6d4 323 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
324 break;
325 }
4f629539 326 die("bad config file line %d in %s", config_linenr, config_file_name);
17712991
LT
327}
328
c8deb5a1 329static int parse_unit_factor(const char *end, unsigned long *val)
0b87b6e0
BD
330{
331 if (!*end)
332 return 1;
c8deb5a1
SP
333 else if (!strcasecmp(end, "k")) {
334 *val *= 1024;
335 return 1;
336 }
337 else if (!strcasecmp(end, "m")) {
338 *val *= 1024 * 1024;
339 return 1;
340 }
341 else if (!strcasecmp(end, "g")) {
342 *val *= 1024 * 1024 * 1024;
343 return 1;
344 }
345 return 0;
0b87b6e0
BD
346}
347
0433bcd9 348static int git_parse_long(const char *value, long *ret)
0b87b6e0
BD
349{
350 if (value && *value) {
351 char *end;
352 long val = strtol(value, &end, 0);
c8deb5a1
SP
353 unsigned long factor = 1;
354 if (!parse_unit_factor(end, &factor))
355 return 0;
356 *ret = val * factor;
0b87b6e0
BD
357 return 1;
358 }
359 return 0;
360}
361
362int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
363{
364 if (value && *value) {
365 char *end;
0b87b6e0 366 unsigned long val = strtoul(value, &end, 0);
c8deb5a1
SP
367 if (!parse_unit_factor(end, &val))
368 return 0;
369 *ret = val;
0b87b6e0 370 return 1;
17712991 371 }
0b87b6e0
BD
372 return 0;
373}
374
c1867cea
JK
375static void die_bad_config(const char *name)
376{
377 if (config_file_name)
378 die("bad config value for '%s' in %s", name, config_file_name);
379 die("bad config value for '%s'", name);
380}
381
0b87b6e0
BD
382int git_config_int(const char *name, const char *value)
383{
0433bcd9 384 long ret = 0;
0b87b6e0 385 if (!git_parse_long(value, &ret))
c1867cea 386 die_bad_config(name);
0b87b6e0
BD
387 return ret;
388}
389
390unsigned long git_config_ulong(const char *name, const char *value)
391{
392 unsigned long ret;
393 if (!git_parse_ulong(value, &ret))
c1867cea 394 die_bad_config(name);
0b87b6e0 395 return ret;
17712991
LT
396}
397
b2be2f6a 398static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
399{
400 if (!value)
401 return 1;
402 if (!*value)
403 return 0;
8420ccd8
JH
404 if (!strcasecmp(value, "true")
405 || !strcasecmp(value, "yes")
406 || !strcasecmp(value, "on"))
17712991 407 return 1;
8420ccd8
JH
408 if (!strcasecmp(value, "false")
409 || !strcasecmp(value, "no")
410 || !strcasecmp(value, "off"))
17712991 411 return 0;
8420ccd8
JH
412 return -1;
413}
414
b2be2f6a
JK
415int git_config_maybe_bool(const char *name, const char *value)
416{
db6195ef 417 long v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
418 if (0 <= v)
419 return v;
db6195ef
JK
420 if (git_parse_long(value, &v))
421 return !!v;
b2be2f6a
JK
422 return -1;
423}
424
8420ccd8
JH
425int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
426{
b2be2f6a 427 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
428 if (0 <= v) {
429 *is_bool = 1;
430 return v;
431 }
a53f2ec6 432 *is_bool = 0;
c35b0b58 433 return git_config_int(name, value);
17712991
LT
434}
435
a53f2ec6
JH
436int git_config_bool(const char *name, const char *value)
437{
438 int discard;
c35b0b58 439 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
440}
441
ea5105a5
CC
442int git_config_string(const char **dest, const char *var, const char *value)
443{
444 if (!value)
445 return config_error_nonbool(var);
446 *dest = xstrdup(value);
447 return 0;
448}
449
395de250
MM
450int git_config_pathname(const char **dest, const char *var, const char *value)
451{
452 if (!value)
453 return config_error_nonbool(var);
454 *dest = expand_user_path(value);
455 if (!*dest)
456 die("Failed to expand user dir in: '%s'", value);
457 return 0;
458}
459
806e2ad7 460static int git_default_core_config(const char *var, const char *value)
17712991
LT
461{
462 /* This needs a better name */
463 if (!strcmp(var, "core.filemode")) {
464 trust_executable_bit = git_config_bool(var, value);
465 return 0;
466 }
1ce4790b
AR
467 if (!strcmp(var, "core.trustctime")) {
468 trust_ctime = git_config_bool(var, value);
469 return 0;
470 }
17712991 471
9378c161
JH
472 if (!strcmp(var, "core.quotepath")) {
473 quote_path_fully = git_config_bool(var, value);
474 return 0;
475 }
476
78a8d641
JS
477 if (!strcmp(var, "core.symlinks")) {
478 has_symlinks = git_config_bool(var, value);
479 return 0;
480 }
481
0a9b88b7
LT
482 if (!strcmp(var, "core.ignorecase")) {
483 ignore_case = git_config_bool(var, value);
484 return 0;
485 }
486
7d1864ce
JH
487 if (!strcmp(var, "core.bare")) {
488 is_bare_repository_cfg = git_config_bool(var, value);
489 return 0;
490 }
491
5f73076c
JH
492 if (!strcmp(var, "core.ignorestat")) {
493 assume_unchanged = git_config_bool(var, value);
494 return 0;
495 }
496
e388c738
JH
497 if (!strcmp(var, "core.prefersymlinkrefs")) {
498 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
499 return 0;
500 }
501
6de08ae6
SP
502 if (!strcmp(var, "core.logallrefupdates")) {
503 log_all_ref_updates = git_config_bool(var, value);
504 return 0;
505 }
506
2f8acdb3
JH
507 if (!strcmp(var, "core.warnambiguousrefs")) {
508 warn_ambiguous_refs = git_config_bool(var, value);
509 return 0;
510 }
511
a71f09fe 512 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
513 int abbrev = git_config_int(var, value);
514 if (abbrev < minimum_abbrev || abbrev > 40)
515 return -1;
516 default_abbrev = abbrev;
517 return 0;
518 }
519
960ccca6 520 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
521 int level = git_config_int(var, value);
522 if (level == -1)
523 level = Z_DEFAULT_COMPRESSION;
524 else if (level < 0 || level > Z_BEST_COMPRESSION)
525 die("bad zlib compression level %d", level);
526 zlib_compression_level = level;
960ccca6
DH
527 zlib_compression_seen = 1;
528 return 0;
529 }
530
531 if (!strcmp(var, "core.compression")) {
532 int level = git_config_int(var, value);
533 if (level == -1)
534 level = Z_DEFAULT_COMPRESSION;
535 else if (level < 0 || level > Z_BEST_COMPRESSION)
536 die("bad zlib compression level %d", level);
537 core_compression_level = level;
538 core_compression_seen = 1;
539 if (!zlib_compression_seen)
540 zlib_compression_level = level;
12f6c308
JBH
541 return 0;
542 }
543
60bb8b14 544 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 545 int pgsz_x2 = getpagesize() * 2;
60bb8b14 546 packed_git_window_size = git_config_int(var, value);
5faaf246
JH
547
548 /* This value must be multiple of (pagesize * 2) */
549 packed_git_window_size /= pgsz_x2;
550 if (packed_git_window_size < 1)
551 packed_git_window_size = 1;
552 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
553 return 0;
554 }
555
15366280
JH
556 if (!strcmp(var, "core.bigfilethreshold")) {
557 long n = git_config_int(var, value);
558 big_file_threshold = 0 < n ? n : 0;
559 return 0;
560 }
561
77ccc5bb
SP
562 if (!strcmp(var, "core.packedgitlimit")) {
563 packed_git_limit = git_config_int(var, value);
564 return 0;
565 }
566
18bdec11
SP
567 if (!strcmp(var, "core.deltabasecachelimit")) {
568 delta_base_cache_limit = git_config_int(var, value);
569 return 0;
570 }
571
6c510bee 572 if (!strcmp(var, "core.autocrlf")) {
d7f46334 573 if (value && !strcasecmp(value, "input")) {
ec70f52f 574 if (core_eol == EOL_CRLF)
942e7747 575 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 576 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
577 return 0;
578 }
6c510bee
LT
579 auto_crlf = git_config_bool(var, value);
580 return 0;
581 }
582
21e5ad50
SP
583 if (!strcmp(var, "core.safecrlf")) {
584 if (value && !strcasecmp(value, "warn")) {
585 safe_crlf = SAFE_CRLF_WARN;
586 return 0;
587 }
588 safe_crlf = git_config_bool(var, value);
589 return 0;
590 }
591
942e7747
EB
592 if (!strcmp(var, "core.eol")) {
593 if (value && !strcasecmp(value, "lf"))
ec70f52f 594 core_eol = EOL_LF;
942e7747 595 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 596 core_eol = EOL_CRLF;
942e7747 597 else if (value && !strcasecmp(value, "native"))
ec70f52f 598 core_eol = EOL_NATIVE;
942e7747 599 else
ec70f52f
JH
600 core_eol = EOL_UNSET;
601 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
602 return error("core.autocrlf=input conflicts with core.eol=crlf");
603 return 0;
604 }
605
a97a7468
JS
606 if (!strcmp(var, "core.notesref")) {
607 notes_ref_name = xstrdup(value);
608 return 0;
609 }
610
806e2ad7
LT
611 if (!strcmp(var, "core.pager"))
612 return git_config_string(&pager_program, var, value);
613
614 if (!strcmp(var, "core.editor"))
615 return git_config_string(&editor_program, var, value);
616
d3e7da89
AK
617 if (!strcmp(var, "core.askpass"))
618 return git_config_string(&askpass_program, var, value);
619
806e2ad7 620 if (!strcmp(var, "core.excludesfile"))
395de250 621 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
622
623 if (!strcmp(var, "core.whitespace")) {
624 if (!value)
625 return config_error_nonbool(var);
626 whitespace_rule_cfg = parse_whitespace_rule(value);
627 return 0;
628 }
629
aafe9fba
LT
630 if (!strcmp(var, "core.fsyncobjectfiles")) {
631 fsync_object_files = git_config_bool(var, value);
632 return 0;
633 }
634
671c9b7e
LT
635 if (!strcmp(var, "core.preloadindex")) {
636 core_preload_index = git_config_bool(var, value);
637 return 0;
638 }
639
348df166
JS
640 if (!strcmp(var, "core.createobject")) {
641 if (!strcmp(value, "rename"))
642 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
643 else if (!strcmp(value, "link"))
644 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
645 else
646 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
647 return 0;
648 }
649
08aefc9e
NTND
650 if (!strcmp(var, "core.sparsecheckout")) {
651 core_apply_sparse_checkout = git_config_bool(var, value);
652 return 0;
653 }
654
806e2ad7
LT
655 /* Add other config variables here and to Documentation/config.txt. */
656 return 0;
657}
658
d1364529 659static int git_default_user_config(const char *var, const char *value)
806e2ad7 660{
e1b10391 661 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
662 if (!value)
663 return config_error_nonbool(var);
817151e6 664 strlcpy(git_default_name, value, sizeof(git_default_name));
91c38a21 665 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
e1b10391
LT
666 return 0;
667 }
668
669 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
670 if (!value)
671 return config_error_nonbool(var);
817151e6 672 strlcpy(git_default_email, value, sizeof(git_default_email));
91c38a21 673 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
e1b10391
LT
674 return 0;
675 }
676
d1364529
LT
677 /* Add other config variables here and to Documentation/config.txt. */
678 return 0;
679}
680
1141f492 681static int git_default_i18n_config(const char *var, const char *value)
d1364529 682{
ea5105a5
CC
683 if (!strcmp(var, "i18n.commitencoding"))
684 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 685
ea5105a5
CC
686 if (!strcmp(var, "i18n.logoutputencoding"))
687 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 688
1141f492
LT
689 /* Add other config variables here and to Documentation/config.txt. */
690 return 0;
691}
039bc64e 692
1141f492
LT
693static int git_default_branch_config(const char *var, const char *value)
694{
9ed36cfa
JS
695 if (!strcmp(var, "branch.autosetupmerge")) {
696 if (value && !strcasecmp(value, "always")) {
697 git_branch_track = BRANCH_TRACK_ALWAYS;
698 return 0;
699 }
700 git_branch_track = git_config_bool(var, value);
701 return 0;
702 }
c998ae9b
DS
703 if (!strcmp(var, "branch.autosetuprebase")) {
704 if (!value)
705 return config_error_nonbool(var);
706 else if (!strcmp(value, "never"))
707 autorebase = AUTOREBASE_NEVER;
708 else if (!strcmp(value, "local"))
709 autorebase = AUTOREBASE_LOCAL;
710 else if (!strcmp(value, "remote"))
711 autorebase = AUTOREBASE_REMOTE;
712 else if (!strcmp(value, "always"))
713 autorebase = AUTOREBASE_ALWAYS;
714 else
715 return error("Malformed value for %s", var);
716 return 0;
717 }
a9cc857a 718
1ab661dd 719 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
720 return 0;
721}
722
52153747
FAG
723static int git_default_push_config(const char *var, const char *value)
724{
725 if (!strcmp(var, "push.default")) {
726 if (!value)
727 return config_error_nonbool(var);
728 else if (!strcmp(value, "nothing"))
729 push_default = PUSH_DEFAULT_NOTHING;
730 else if (!strcmp(value, "matching"))
731 push_default = PUSH_DEFAULT_MATCHING;
53c40311
JH
732 else if (!strcmp(value, "upstream"))
733 push_default = PUSH_DEFAULT_UPSTREAM;
734 else if (!strcmp(value, "tracking")) /* deprecated */
735 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
736 else if (!strcmp(value, "current"))
737 push_default = PUSH_DEFAULT_CURRENT;
738 else {
739 error("Malformed value for %s: %s", var, value);
740 return error("Must be one of nothing, matching, "
741 "tracking or current.");
742 }
743 return 0;
744 }
745
746 /* Add other config variables here and to Documentation/config.txt. */
747 return 0;
748}
749
d551a488
MSO
750static int git_default_mailmap_config(const char *var, const char *value)
751{
752 if (!strcmp(var, "mailmap.file"))
753 return git_config_string(&git_mailmap_file, var, value);
754
755 /* Add other config variables here and to Documentation/config.txt. */
756 return 0;
757}
758
1141f492
LT
759int git_default_config(const char *var, const char *value, void *dummy)
760{
761 if (!prefixcmp(var, "core."))
762 return git_default_core_config(var, value);
763
764 if (!prefixcmp(var, "user."))
765 return git_default_user_config(var, value);
766
767 if (!prefixcmp(var, "i18n."))
768 return git_default_i18n_config(var, value);
769
770 if (!prefixcmp(var, "branch."))
771 return git_default_branch_config(var, value);
772
52153747
FAG
773 if (!prefixcmp(var, "push."))
774 return git_default_push_config(var, value);
775
d551a488
MSO
776 if (!prefixcmp(var, "mailmap."))
777 return git_default_mailmap_config(var, value);
778
75194438
JK
779 if (!prefixcmp(var, "advice."))
780 return git_default_advice_config(var, value);
781
1141f492
LT
782 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
783 pager_use_color = git_config_bool(var,value);
784 return 0;
785 }
786
787 /* Add other config variables here and to Documentation/config.txt. */
788 return 0;
789}
790
ef90d6d4 791int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
792{
793 int ret;
4f629539 794 FILE *f = fopen(filename, "r");
17712991
LT
795
796 ret = -1;
797 if (f) {
798 config_file = f;
4f629539 799 config_file_name = filename;
17712991 800 config_linenr = 1;
02e5ba4a 801 config_file_eof = 0;
ef90d6d4 802 ret = git_parse_file(fn, data);
17712991 803 fclose(f);
4f629539 804 config_file_name = NULL;
17712991
LT
805 }
806 return ret;
807}
10bea152 808
506b17b1
JS
809const char *git_etc_gitconfig(void)
810{
7f0e39fa 811 static const char *system_wide;
2de9de5e
SP
812 if (!system_wide)
813 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 814 return system_wide;
506b17b1
JS
815}
816
0ef37164 817int git_env_bool(const char *k, int def)
ab88c363
JK
818{
819 const char *v = getenv(k);
820 return v ? git_config_bool(k, v) : def;
821}
822
823int git_config_system(void)
824{
825 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
826}
827
dbdf5854 828int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 829{
aa387407 830 int ret = 0, found = 0;
dc871831 831 const char *home = NULL;
5f1a63e0 832
8befc50c 833 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
dc871831
DB
834 if (config_exclusive_filename)
835 return git_config_from_file(fn, config_exclusive_filename, data);
aa387407 836 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
dc871831
DB
837 ret += git_config_from_file(fn, git_etc_gitconfig(),
838 data);
aa387407
FC
839 found += 1;
840 }
5f1a63e0 841
dc871831 842 home = getenv("HOME");
8f323c00 843 if (home) {
9befac47 844 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
aa387407 845 if (!access(user_config, R_OK)) {
dc871831 846 ret += git_config_from_file(fn, user_config, data);
aa387407
FC
847 found += 1;
848 }
5f1a63e0
JS
849 free(user_config);
850 }
851
dbdf5854 852 if (repo_config && !access(repo_config, R_OK)) {
aa387407
FC
853 ret += git_config_from_file(fn, repo_config, data);
854 found += 1;
855 }
8b1fa778 856
5a0c9eeb
JK
857 switch (git_config_from_parameters(fn, data)) {
858 case -1: /* error */
859 ret--;
860 break;
861 case 0: /* found nothing */
862 break;
863 default: /* found at least one item */
864 found++;
865 break;
866 }
8b1fa778 867
1f2baa78 868 return ret == 0 ? found : ret;
4f629539
JH
869}
870
dbdf5854
NTND
871int git_config(config_fn_t fn, void *data)
872{
873 char *repo_config = NULL;
874 int ret;
875
876 repo_config = git_pathdup("config");
877 ret = git_config_early(fn, data, repo_config);
878 if (repo_config)
879 free(repo_config);
880 return ret;
881}
882
10bea152
JS
883/*
884 * Find all the stuff for git_config_set() below.
885 */
4ddba79d
JS
886
887#define MAX_MATCHES 512
888
10bea152
JS
889static struct {
890 int baselen;
4b25d091 891 char *key;
f98d863d 892 int do_not_match;
4b25d091 893 regex_t *value_regex;
4ddba79d 894 int multi_replace;
dc49cd76 895 size_t offset[MAX_MATCHES];
10bea152
JS
896 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
897 int seen;
898} store;
899
4b25d091 900static int matches(const char *key, const char *value)
f98d863d
JS
901{
902 return !strcmp(key, store.key) &&
903 (store.value_regex == NULL ||
904 (store.do_not_match ^
905 !regexec(store.value_regex, value, 0, NULL, 0)));
906}
907
4b25d091 908static int store_aux(const char *key, const char *value, void *cb)
10bea152 909{
ae9ee41d
JH
910 const char *ep;
911 size_t section_len;
912
10bea152
JS
913 switch (store.state) {
914 case KEY_SEEN:
f98d863d 915 if (matches(key, value)) {
4ddba79d 916 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 917 warning("%s has multiple values", key);
4ddba79d 918 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 919 error("too many matches for %s", key);
4ddba79d 920 return 1;
10bea152 921 }
4ddba79d
JS
922
923 store.offset[store.seen] = ftell(config_file);
10bea152
JS
924 store.seen++;
925 }
926 break;
927 case SECTION_SEEN:
ae9ee41d
JH
928 /*
929 * What we are looking for is in store.key (both
930 * section and var), and its section part is baselen
931 * long. We found key (again, both section and var).
932 * We would want to know if this key is in the same
933 * section as what we are looking for. We already
934 * know we are in the same section as what should
935 * hold store.key.
936 */
937 ep = strrchr(key, '.');
938 section_len = ep - key;
939
940 if ((section_len != store.baselen) ||
941 memcmp(key, store.key, section_len+1)) {
10bea152
JS
942 store.state = SECTION_END_SEEN;
943 break;
ae9ee41d
JH
944 }
945
946 /*
947 * Do not increment matches: this is no match, but we
948 * just made sure we are in the desired section.
949 */
950 store.offset[store.seen] = ftell(config_file);
10bea152
JS
951 /* fallthru */
952 case SECTION_END_SEEN:
953 case START:
f98d863d 954 if (matches(key, value)) {
4ddba79d 955 store.offset[store.seen] = ftell(config_file);
10bea152
JS
956 store.state = KEY_SEEN;
957 store.seen++;
d14f7764
LT
958 } else {
959 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 960 !strncmp(key, store.key, store.baselen)) {
93ddef3e 961 store.state = SECTION_SEEN;
bdf0ef08 962 store.offset[store.seen] = ftell(config_file);
d14f7764 963 }
bdf0ef08 964 }
10bea152
JS
965 }
966 return 0;
967}
968
64c0d71c 969static int write_error(const char *filename)
480c9e52 970{
64c0d71c 971 error("failed to write new configuration file %s", filename);
480c9e52
AW
972
973 /* Same error code as "failed to rename". */
974 return 4;
975}
976
4b25d091 977static int store_write_section(int fd, const char *key)
10bea152 978{
cb891a59
KH
979 const char *dot;
980 int i, success;
f285a2d7 981 struct strbuf sb = STRBUF_INIT;
d14f7764 982
cb891a59 983 dot = memchr(key, '.', store.baselen);
d14f7764 984 if (dot) {
cb891a59
KH
985 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
986 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 987 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
988 strbuf_addch(&sb, '\\');
989 strbuf_addch(&sb, key[i]);
d14f7764 990 }
cb891a59
KH
991 strbuf_addstr(&sb, "\"]\n");
992 } else {
993 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
994 }
995
cb891a59
KH
996 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
997 strbuf_release(&sb);
480c9e52 998
cb891a59 999 return success;
10bea152
JS
1000}
1001
4b25d091 1002static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1003{
cb891a59
KH
1004 int i, success;
1005 int length = strlen(key + store.baselen + 1);
1006 const char *quote = "";
f285a2d7 1007 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1008
6281f394
JM
1009 /*
1010 * Check to see if the value needs to be surrounded with a dq pair.
1011 * Note that problematic characters are always backslash-quoted; this
1012 * check is about not losing leading or trailing SP and strings that
1013 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1014 * configuration parser.
1015 */
cdd4fb15 1016 if (value[0] == ' ')
cb891a59 1017 quote = "\"";
cdd4fb15
BG
1018 for (i = 0; value[i]; i++)
1019 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1020 quote = "\"";
1021 if (i && value[i - 1] == ' ')
1022 quote = "\"";
1023
cb891a59
KH
1024 strbuf_addf(&sb, "\t%.*s = %s",
1025 length, key + store.baselen + 1, quote);
10bea152 1026
10bea152
JS
1027 for (i = 0; value[i]; i++)
1028 switch (value[i]) {
480c9e52 1029 case '\n':
cb891a59 1030 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1031 break;
1032 case '\t':
cb891a59 1033 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1034 break;
1035 case '"':
1036 case '\\':
cb891a59 1037 strbuf_addch(&sb, '\\');
480c9e52 1038 default:
cb891a59 1039 strbuf_addch(&sb, value[i]);
480c9e52
AW
1040 break;
1041 }
cb891a59
KH
1042 strbuf_addf(&sb, "%s\n", quote);
1043
1044 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1045 strbuf_release(&sb);
1046
1047 return success;
10bea152
JS
1048}
1049
4b25d091
FC
1050static ssize_t find_beginning_of_line(const char *contents, size_t size,
1051 size_t offset_, int *found_bracket)
4ddba79d 1052{
dc49cd76
SP
1053 size_t equal_offset = size, bracket_offset = size;
1054 ssize_t offset;
4ddba79d 1055
7a31cc0f 1056contline:
a6080a0a 1057 for (offset = offset_-2; offset > 0
4ddba79d
JS
1058 && contents[offset] != '\n'; offset--)
1059 switch (contents[offset]) {
1060 case '=': equal_offset = offset; break;
1061 case ']': bracket_offset = offset; break;
1062 }
7a31cc0f
FL
1063 if (offset > 0 && contents[offset-1] == '\\') {
1064 offset_ = offset;
1065 goto contline;
1066 }
4ddba79d
JS
1067 if (bracket_offset < equal_offset) {
1068 *found_bracket = 1;
1069 offset = bracket_offset+1;
1070 } else
1071 offset++;
1072
1073 return offset;
1074}
1075
4b25d091 1076int git_config_set(const char *key, const char *value)
10bea152 1077{
4ddba79d 1078 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1079}
1080
b09c53a3
LP
1081/*
1082 * Auxiliary function to sanity-check and split the key into the section
1083 * identifier and variable name.
1084 *
1085 * Returns 0 on success, -1 when there is an invalid character in the key and
1086 * -2 if there is no section name in the key.
1087 *
1088 * store_key - pointer to char* which will hold a copy of the key with
1089 * lowercase section and variable name
1090 * baselen - pointer to int which will hold the length of the
1091 * section + subsection part, can be NULL
1092 */
1093int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1094{
1095 int i, dot, baselen;
1096 const char *last_dot = strrchr(key, '.');
1097
1098 /*
1099 * Since "key" actually contains the section name and the real
1100 * key name separated by a dot, we have to know where the dot is.
1101 */
1102
2169ddc0 1103 if (last_dot == NULL || last_dot == key) {
b09c53a3 1104 error("key does not contain a section: %s", key);
7a397419 1105 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1106 }
1107
2169ddc0
LP
1108 if (!last_dot[1]) {
1109 error("key does not contain variable name: %s", key);
7a397419 1110 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1111 }
1112
b09c53a3
LP
1113 baselen = last_dot - key;
1114 if (baselen_)
1115 *baselen_ = baselen;
1116
1117 /*
1118 * Validate the key and while at it, lower case it for matching.
1119 */
1120 *store_key = xmalloc(strlen(key) + 1);
1121
1122 dot = 0;
1123 for (i = 0; key[i]; i++) {
1124 unsigned char c = key[i];
1125 if (c == '.')
1126 dot = 1;
1127 /* Leave the extended basename untouched.. */
1128 if (!dot || i > baselen) {
1129 if (!iskeychar(c) ||
1130 (i == baselen + 1 && !isalpha(c))) {
1131 error("invalid key: %s", key);
1132 goto out_free_ret_1;
1133 }
1134 c = tolower(c);
1135 } else if (c == '\n') {
1136 error("invalid key (newline): %s", key);
1137 goto out_free_ret_1;
1138 }
1139 (*store_key)[i] = c;
1140 }
1141 (*store_key)[i] = 0;
1142
1143 return 0;
1144
1145out_free_ret_1:
1146 free(*store_key);
7a397419 1147 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1148}
1149
10bea152
JS
1150/*
1151 * If value==NULL, unset in (remove from) config,
1152 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1153 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1154 * else all matching key/values (regardless how many) are removed,
1155 * before the new pair is written.
10bea152
JS
1156 *
1157 * Returns 0 on success.
1158 *
1159 * This function does this:
1160 *
1161 * - it locks the config file by creating ".git/config.lock"
1162 *
1163 * - it then parses the config using store_aux() as validator to find
1164 * the position on the key/value pair to replace. If it is to be unset,
1165 * it must be found exactly once.
1166 *
1167 * - the config file is mmap()ed and the part before the match (if any) is
1168 * written to the lock file, then the changed part and the rest.
1169 *
1170 * - the config file is removed and the lock file rename()d to it.
1171 *
1172 */
4b25d091
FC
1173int git_config_set_multivar(const char *key, const char *value,
1174 const char *value_regex, int multi_replace)
10bea152 1175{
f8ba655e 1176 int fd = -1, in_fd;
dafc88b1 1177 int ret;
4b25d091 1178 char *config_filename;
6cbf973c 1179 struct lock_file *lock = NULL;
4ddba79d 1180
dc871831
DB
1181 if (config_exclusive_filename)
1182 config_filename = xstrdup(config_exclusive_filename);
1183 else
a4f34cbb 1184 config_filename = git_pathdup("config");
9c3796fc 1185
b09c53a3
LP
1186 /* parse-key returns negative; flip the sign to feed exit(3) */
1187 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1188 if (ret)
dafc88b1 1189 goto out_free;
b17e659d
JS
1190
1191 store.multi_replace = multi_replace;
10bea152 1192
10bea152
JS
1193
1194 /*
6cbf973c 1195 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1196 * contents of .git/config will be written into it.
1197 */
6cbf973c
BS
1198 lock = xcalloc(sizeof(struct lock_file), 1);
1199 fd = hold_lock_file_for_update(lock, config_filename, 0);
1200 if (fd < 0) {
6ffd567b 1201 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1202 free(store.key);
7a397419 1203 ret = CONFIG_NO_LOCK;
dafc88b1 1204 goto out_free;
10bea152
JS
1205 }
1206
1207 /*
1208 * If .git/config does not exist yet, write a minimal version.
1209 */
88fb958b
AR
1210 in_fd = open(config_filename, O_RDONLY);
1211 if ( in_fd < 0 ) {
10bea152
JS
1212 free(store.key);
1213
88fb958b
AR
1214 if ( ENOENT != errno ) {
1215 error("opening %s: %s", config_filename,
1216 strerror(errno));
7a397419 1217 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1218 goto out_free;
88fb958b 1219 }
10bea152
JS
1220 /* if nothing to unset, error out */
1221 if (value == NULL) {
7a397419 1222 ret = CONFIG_NOTHING_SET;
dafc88b1 1223 goto out_free;
10bea152
JS
1224 }
1225
4b25d091 1226 store.key = (char *)key;
480c9e52 1227 if (!store_write_section(fd, key) ||
93c1e079
JH
1228 !store_write_pair(fd, key, value))
1229 goto write_err_out;
1230 } else {
88fb958b 1231 struct stat st;
4b25d091 1232 char *contents;
dc49cd76
SP
1233 size_t contents_sz, copy_begin, copy_end;
1234 int i, new_line = 0;
10bea152
JS
1235
1236 if (value_regex == NULL)
1237 store.value_regex = NULL;
1238 else {
f98d863d
JS
1239 if (value_regex[0] == '!') {
1240 store.do_not_match = 1;
1241 value_regex++;
1242 } else
1243 store.do_not_match = 0;
1244
2d7320d0 1245 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1246 if (regcomp(store.value_regex, value_regex,
1247 REG_EXTENDED)) {
64c0d71c 1248 error("invalid pattern: %s", value_regex);
10bea152 1249 free(store.value_regex);
7a397419 1250 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1251 goto out_free;
10bea152
JS
1252 }
1253 }
1254
4ddba79d 1255 store.offset[0] = 0;
10bea152
JS
1256 store.state = START;
1257 store.seen = 0;
1258
1259 /*
1260 * After this, store.offset will contain the *end* offset
1261 * of the last match, or remain at 0 if no match was found.
1262 * As a side effect, we make sure to transform only a valid
1263 * existing config file.
1264 */
ef90d6d4 1265 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1266 error("invalid config file %s", config_filename);
10bea152
JS
1267 free(store.key);
1268 if (store.value_regex != NULL) {
1269 regfree(store.value_regex);
1270 free(store.value_regex);
1271 }
7a397419 1272 ret = CONFIG_INVALID_FILE;
dafc88b1 1273 goto out_free;
10bea152
JS
1274 }
1275
1276 free(store.key);
1277 if (store.value_regex != NULL) {
1278 regfree(store.value_regex);
1279 free(store.value_regex);
1280 }
1281
4ddba79d
JS
1282 /* if nothing to unset, or too many matches, error out */
1283 if ((store.seen == 0 && value == NULL) ||
1284 (store.seen > 1 && multi_replace == 0)) {
7a397419 1285 ret = CONFIG_NOTHING_SET;
dafc88b1 1286 goto out_free;
10bea152
JS
1287 }
1288
88fb958b 1289 fstat(in_fd, &st);
dc49cd76
SP
1290 contents_sz = xsize_t(st.st_size);
1291 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1292 MAP_PRIVATE, in_fd, 0);
1293 close(in_fd);
1294
4ddba79d
JS
1295 if (store.seen == 0)
1296 store.seen = 1;
1297
1298 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1299 if (store.offset[i] == 0) {
dc49cd76 1300 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1301 } else if (store.state != KEY_SEEN) {
1302 copy_end = store.offset[i];
10bea152 1303 } else
4ddba79d 1304 copy_end = find_beginning_of_line(
dc49cd76 1305 contents, contents_sz,
4ddba79d
JS
1306 store.offset[i]-2, &new_line);
1307
02e5ba4a
JK
1308 if (copy_end > 0 && contents[copy_end-1] != '\n')
1309 new_line = 1;
1310
4ddba79d
JS
1311 /* write the first part of the config */
1312 if (copy_end > copy_begin) {
93c1e079
JH
1313 if (write_in_full(fd, contents + copy_begin,
1314 copy_end - copy_begin) <
1315 copy_end - copy_begin)
1316 goto write_err_out;
1317 if (new_line &&
2b7ca830 1318 write_str_in_full(fd, "\n") != 1)
93c1e079 1319 goto write_err_out;
4ddba79d
JS
1320 }
1321 copy_begin = store.offset[i];
10bea152
JS
1322 }
1323
10bea152
JS
1324 /* write the pair (value == NULL means unset) */
1325 if (value != NULL) {
93c1e079
JH
1326 if (store.state == START) {
1327 if (!store_write_section(fd, key))
1328 goto write_err_out;
480c9e52 1329 }
93c1e079
JH
1330 if (!store_write_pair(fd, key, value))
1331 goto write_err_out;
10bea152
JS
1332 }
1333
1334 /* write the rest of the config */
dc49cd76 1335 if (copy_begin < contents_sz)
93c1e079 1336 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1337 contents_sz - copy_begin) <
1338 contents_sz - copy_begin)
93c1e079 1339 goto write_err_out;
10bea152 1340
dc49cd76 1341 munmap(contents, contents_sz);
10bea152
JS
1342 }
1343
4ed7cd3a 1344 if (commit_lock_file(lock) < 0) {
64c0d71c 1345 error("could not commit config file %s", config_filename);
7a397419 1346 ret = CONFIG_NO_WRITE;
dafc88b1 1347 goto out_free;
10bea152
JS
1348 }
1349
6cbf973c
BS
1350 /*
1351 * lock is committed, so don't try to roll it back below.
1352 * NOTE: Since lockfile.c keeps a linked list of all created
1353 * lock_file structures, it isn't safe to free(lock). It's
1354 * better to just leave it hanging around.
1355 */
1356 lock = NULL;
dafc88b1
SH
1357 ret = 0;
1358
1359out_free:
6cbf973c
BS
1360 if (lock)
1361 rollback_lock_file(lock);
4cac42b1 1362 free(config_filename);
dafc88b1 1363 return ret;
93c1e079
JH
1364
1365write_err_out:
64c0d71c 1366 ret = write_error(lock->filename);
93c1e079
JH
1367 goto out_free;
1368
10bea152
JS
1369}
1370
118f8b24
PB
1371static int section_name_match (const char *buf, const char *name)
1372{
1373 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1374 if (buf[i] != '[')
1375 return 0;
1376 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1377 if (!dot && isspace(buf[i])) {
1378 dot = 1;
1379 if (name[j++] != '.')
1380 break;
1381 for (i++; isspace(buf[i]); i++)
1382 ; /* do nothing */
1383 if (buf[i] != '"')
1384 break;
1385 continue;
1386 }
1387 if (buf[i] == '\\' && dot)
1388 i++;
1389 else if (buf[i] == '"' && dot) {
1390 for (i++; isspace(buf[i]); i++)
1391 ; /* do_nothing */
1392 break;
1393 }
1394 if (buf[i] != name[j++])
1395 break;
1396 }
a4c0d463
AV
1397 if (buf[i] == ']' && name[j] == 0) {
1398 /*
1399 * We match, now just find the right length offset by
1400 * gobbling up any whitespace after it, as well
1401 */
1402 i++;
1403 for (; buf[i] && isspace(buf[i]); i++)
1404 ; /* do nothing */
1405 return i;
1406 }
1407 return 0;
118f8b24
PB
1408}
1409
1410/* if new_name == NULL, the section is removed instead */
0667fcfb
JS
1411int git_config_rename_section(const char *old_name, const char *new_name)
1412{
118f8b24 1413 int ret = 0, remove = 0;
fc1905bb 1414 char *config_filename;
0667fcfb
JS
1415 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1416 int out_fd;
1417 char buf[1024];
1418
dc871831
DB
1419 if (config_exclusive_filename)
1420 config_filename = xstrdup(config_exclusive_filename);
1421 else
a4f34cbb 1422 config_filename = git_pathdup("config");
0667fcfb 1423 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1424 if (out_fd < 0) {
64c0d71c 1425 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1426 goto out;
1427 }
0667fcfb 1428
fc1905bb 1429 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1430 /* no config file means nothing to rename, no error */
1431 goto unlock_and_out;
fc1905bb 1432 }
0667fcfb
JS
1433
1434 while (fgets(buf, sizeof(buf), config_file)) {
1435 int i;
480c9e52 1436 int length;
9a5abfc7 1437 char *output = buf;
0667fcfb
JS
1438 for (i = 0; buf[i] && isspace(buf[i]); i++)
1439 ; /* do nothing */
1440 if (buf[i] == '[') {
1441 /* it's a section */
a4c0d463
AV
1442 int offset = section_name_match(&buf[i], old_name);
1443 if (offset > 0) {
118f8b24
PB
1444 ret++;
1445 if (new_name == NULL) {
1446 remove = 1;
0667fcfb
JS
1447 continue;
1448 }
0667fcfb 1449 store.baselen = strlen(new_name);
480c9e52 1450 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1451 ret = write_error(lock->filename);
480c9e52
AW
1452 goto out;
1453 }
9a5abfc7
AV
1454 /*
1455 * We wrote out the new section, with
1456 * a newline, now skip the old
1457 * section's length
1458 */
1459 output += offset + i;
1460 if (strlen(output) > 0) {
1461 /*
1462 * More content means there's
1463 * a declaration to put on the
1464 * next line; indent with a
1465 * tab
1466 */
1467 output -= 1;
1468 output[0] = '\t';
1469 }
0667fcfb 1470 }
118f8b24 1471 remove = 0;
0667fcfb 1472 }
118f8b24
PB
1473 if (remove)
1474 continue;
9a5abfc7
AV
1475 length = strlen(output);
1476 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1477 ret = write_error(lock->filename);
480c9e52
AW
1478 goto out;
1479 }
0667fcfb 1480 }
fc1905bb 1481 fclose(config_file);
01ebb9dc 1482 unlock_and_out:
4ed7cd3a 1483 if (commit_lock_file(lock) < 0)
64c0d71c 1484 ret = error("could not commit config file %s", config_filename);
fc1905bb
JH
1485 out:
1486 free(config_filename);
0667fcfb
JS
1487 return ret;
1488}
40ea4ed9
JH
1489
1490/*
1491 * Call this to report error for your variable that should not
1492 * get a boolean value (i.e. "[my] var" means "true").
1493 */
1494int config_error_nonbool(const char *var)
1495{
1496 return error("Missing value for '%s'", var);
1497}