config: eliminate config_exclusive_filename
[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
924aaf3e
RJ
15typedef struct config_file {
16 struct config_file *prev;
17 FILE *f;
18 const char *name;
19 int linenr;
20 int eof;
21 struct strbuf value;
22 char var[MAXNAME];
23} config_file;
24
25static config_file *cf;
26
960ccca6
DH
27static int zlib_compression_seen;
28
8b1fa778
AR
29static void lowercase(char *p)
30{
31 for (; *p; p++)
32 *p = tolower(*p);
33}
8b1fa778 34
2b64fc89
JK
35void git_config_push_parameter(const char *text)
36{
37 struct strbuf env = STRBUF_INIT;
38 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
39 if (old) {
40 strbuf_addstr(&env, old);
41 strbuf_addch(&env, ' ');
42 }
43 sq_quote_buf(&env, text);
44 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
45 strbuf_release(&env);
46}
47
2496844b
JK
48int git_config_parse_parameter(const char *text,
49 config_fn_t fn, void *data)
8b1fa778 50{
572e4f6a 51 struct strbuf **pair;
f77bccae 52 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
53 if (!pair[0])
54 return error("bogus config parameter: %s", text);
572e4f6a
AR
55 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
56 strbuf_setlen(pair[0], pair[0]->len - 1);
57 strbuf_trim(pair[0]);
58 if (!pair[0]->len) {
59 strbuf_list_free(pair);
06eb708f 60 return error("bogus config parameter: %s", text);
8b1fa778 61 }
06eb708f
JK
62 lowercase(pair[0]->buf);
63 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
64 strbuf_list_free(pair);
65 return -1;
572e4f6a
AR
66 }
67 strbuf_list_free(pair);
8b1fa778
AR
68 return 0;
69}
70
06eb708f
JK
71int git_config_from_parameters(config_fn_t fn, void *data)
72{
2b64fc89
JK
73 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
74 char *envw;
75 const char **argv = NULL;
76 int nr = 0, alloc = 0;
77 int i;
78
79 if (!env)
80 return 0;
81 /* sq_dequote will write over it */
82 envw = xstrdup(env);
83
84 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
85 free(envw);
86 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
87 }
88
89 for (i = 0; i < nr; i++) {
06eb708f 90 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
91 free(argv);
92 free(envw);
93 return -1;
94 }
95 }
96
97 free(argv);
98 free(envw);
06eb708f 99 return nr > 0;
2b64fc89
JK
100}
101
17712991
LT
102static int get_next_char(void)
103{
104 int c;
105 FILE *f;
106
107 c = '\n';
924aaf3e 108 if (cf && ((f = cf->f) != NULL)) {
17712991 109 c = fgetc(f);
db2c075d
JH
110 if (c == '\r') {
111 /* DOS like systems */
112 c = fgetc(f);
113 if (c != '\n') {
114 ungetc(c, f);
115 c = '\r';
116 }
117 }
17712991 118 if (c == '\n')
924aaf3e 119 cf->linenr++;
17712991 120 if (c == EOF) {
924aaf3e 121 cf->eof = 1;
17712991
LT
122 c = '\n';
123 }
124 }
125 return c;
126}
127
128static char *parse_value(void)
129{
e96c19c5 130 int quote = 0, comment = 0, space = 0;
17712991 131
924aaf3e 132 strbuf_reset(&cf->value);
17712991
LT
133 for (;;) {
134 int c = get_next_char();
17712991
LT
135 if (c == '\n') {
136 if (quote)
137 return NULL;
924aaf3e 138 return cf->value.buf;
17712991
LT
139 }
140 if (comment)
141 continue;
142 if (isspace(c) && !quote) {
924aaf3e 143 if (cf->value.len)
ebdaae37 144 space++;
17712991
LT
145 continue;
146 }
7ebdba61
JS
147 if (!quote) {
148 if (c == ';' || c == '#') {
149 comment = 1;
150 continue;
151 }
152 }
ebdaae37 153 for (; space; space--)
924aaf3e 154 strbuf_addch(&cf->value, ' ');
17712991
LT
155 if (c == '\\') {
156 c = get_next_char();
157 switch (c) {
158 case '\n':
159 continue;
160 case 't':
161 c = '\t';
162 break;
163 case 'b':
164 c = '\b';
165 break;
166 case 'n':
167 c = '\n';
168 break;
5cbb401d
LT
169 /* Some characters escape as themselves */
170 case '\\': case '"':
171 break;
172 /* Reject unknown escape sequences */
173 default:
174 return NULL;
17712991 175 }
924aaf3e 176 strbuf_addch(&cf->value, c);
17712991
LT
177 continue;
178 }
179 if (c == '"') {
180 quote = 1-quote;
181 continue;
182 }
924aaf3e 183 strbuf_addch(&cf->value, c);
17712991
LT
184 }
185}
186
38c5afa8
LT
187static inline int iskeychar(int c)
188{
189 return isalnum(c) || c == '-';
190}
191
ef90d6d4 192static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
193{
194 int c;
195 char *value;
196
197 /* Get the full name */
198 for (;;) {
199 c = get_next_char();
924aaf3e 200 if (cf->eof)
17712991 201 break;
38c5afa8 202 if (!iskeychar(c))
17712991
LT
203 break;
204 name[len++] = tolower(c);
205 if (len >= MAXNAME)
206 return -1;
207 }
208 name[len] = 0;
209 while (c == ' ' || c == '\t')
210 c = get_next_char();
211
212 value = NULL;
213 if (c != '\n') {
214 if (c != '=')
215 return -1;
216 value = parse_value();
217 if (!value)
218 return -1;
219 }
ef90d6d4 220 return fn(name, value, data);
17712991
LT
221}
222
d14f7764
LT
223static int get_extended_base_var(char *name, int baselen, int c)
224{
225 do {
226 if (c == '\n')
227 return -1;
228 c = get_next_char();
229 } while (isspace(c));
230
231 /* We require the format to be '[base "extension"]' */
232 if (c != '"')
233 return -1;
234 name[baselen++] = '.';
235
236 for (;;) {
237 int c = get_next_char();
238 if (c == '\n')
239 return -1;
240 if (c == '"')
241 break;
242 if (c == '\\') {
243 c = get_next_char();
244 if (c == '\n')
245 return -1;
246 }
247 name[baselen++] = c;
248 if (baselen > MAXNAME / 2)
249 return -1;
250 }
251
252 /* Final ']' */
253 if (get_next_char() != ']')
254 return -1;
255 return baselen;
256}
257
17712991
LT
258static int get_base_var(char *name)
259{
260 int baselen = 0;
261
262 for (;;) {
263 int c = get_next_char();
924aaf3e 264 if (cf->eof)
17712991
LT
265 return -1;
266 if (c == ']')
267 return baselen;
d14f7764
LT
268 if (isspace(c))
269 return get_extended_base_var(name, baselen, c);
38c5afa8 270 if (!iskeychar(c) && c != '.')
17712991
LT
271 return -1;
272 if (baselen > MAXNAME / 2)
273 return -1;
274 name[baselen++] = tolower(c);
275 }
276}
277
ef90d6d4 278static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
279{
280 int comment = 0;
281 int baselen = 0;
924aaf3e 282 char *var = cf->var;
17712991 283
de056402
PB
284 /* U+FEFF Byte Order Mark in UTF8 */
285 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
286 const unsigned char *bomptr = utf8_bom;
287
17712991
LT
288 for (;;) {
289 int c = get_next_char();
de056402
PB
290 if (bomptr && *bomptr) {
291 /* We are at the file beginning; skip UTF8-encoded BOM
292 * if present. Sane editors won't put this in on their
293 * own, but e.g. Windows Notepad will do it happily. */
294 if ((unsigned char) c == *bomptr) {
295 bomptr++;
296 continue;
297 } else {
298 /* Do not tolerate partial BOM. */
299 if (bomptr != utf8_bom)
300 break;
301 /* No BOM at file beginning. Cool. */
302 bomptr = NULL;
303 }
304 }
17712991 305 if (c == '\n') {
924aaf3e 306 if (cf->eof)
17712991
LT
307 return 0;
308 comment = 0;
309 continue;
310 }
311 if (comment || isspace(c))
312 continue;
313 if (c == '#' || c == ';') {
314 comment = 1;
315 continue;
316 }
317 if (c == '[') {
318 baselen = get_base_var(var);
319 if (baselen <= 0)
320 break;
321 var[baselen++] = '.';
322 var[baselen] = 0;
323 continue;
324 }
325 if (!isalpha(c))
326 break;
128af9d1 327 var[baselen] = tolower(c);
ef90d6d4 328 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
329 break;
330 }
924aaf3e 331 die("bad config file line %d in %s", cf->linenr, cf->name);
17712991
LT
332}
333
ebaa1bd4 334static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
335{
336 if (!*end)
337 return 1;
c8deb5a1
SP
338 else if (!strcasecmp(end, "k")) {
339 *val *= 1024;
340 return 1;
341 }
342 else if (!strcasecmp(end, "m")) {
343 *val *= 1024 * 1024;
344 return 1;
345 }
346 else if (!strcasecmp(end, "g")) {
347 *val *= 1024 * 1024 * 1024;
348 return 1;
349 }
350 return 0;
0b87b6e0
BD
351}
352
0433bcd9 353static int git_parse_long(const char *value, long *ret)
0b87b6e0
BD
354{
355 if (value && *value) {
356 char *end;
ebaa1bd4
NA
357 intmax_t val;
358 uintmax_t uval;
359 uintmax_t factor = 1;
360
361 errno = 0;
362 val = strtoimax(value, &end, 0);
363 if (errno == ERANGE)
364 return 0;
c8deb5a1
SP
365 if (!parse_unit_factor(end, &factor))
366 return 0;
ebaa1bd4
NA
367 uval = abs(val);
368 uval *= factor;
369 if ((uval > maximum_signed_value_of_type(long)) ||
370 (abs(val) > uval))
371 return 0;
372 val *= factor;
373 *ret = val;
0b87b6e0
BD
374 return 1;
375 }
376 return 0;
377}
378
379int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
380{
381 if (value && *value) {
382 char *end;
ebaa1bd4
NA
383 uintmax_t val;
384 uintmax_t oldval;
385
386 errno = 0;
387 val = strtoumax(value, &end, 0);
388 if (errno == ERANGE)
389 return 0;
390 oldval = val;
c8deb5a1
SP
391 if (!parse_unit_factor(end, &val))
392 return 0;
ebaa1bd4
NA
393 if ((val > maximum_unsigned_value_of_type(long)) ||
394 (oldval > val))
395 return 0;
c8deb5a1 396 *ret = val;
0b87b6e0 397 return 1;
17712991 398 }
0b87b6e0
BD
399 return 0;
400}
401
c1867cea
JK
402static void die_bad_config(const char *name)
403{
924aaf3e
RJ
404 if (cf && cf->name)
405 die("bad config value for '%s' in %s", name, cf->name);
c1867cea
JK
406 die("bad config value for '%s'", name);
407}
408
0b87b6e0
BD
409int git_config_int(const char *name, const char *value)
410{
0433bcd9 411 long ret = 0;
0b87b6e0 412 if (!git_parse_long(value, &ret))
c1867cea 413 die_bad_config(name);
0b87b6e0
BD
414 return ret;
415}
416
417unsigned long git_config_ulong(const char *name, const char *value)
418{
419 unsigned long ret;
420 if (!git_parse_ulong(value, &ret))
c1867cea 421 die_bad_config(name);
0b87b6e0 422 return ret;
17712991
LT
423}
424
b2be2f6a 425static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
426{
427 if (!value)
428 return 1;
429 if (!*value)
430 return 0;
8420ccd8
JH
431 if (!strcasecmp(value, "true")
432 || !strcasecmp(value, "yes")
433 || !strcasecmp(value, "on"))
17712991 434 return 1;
8420ccd8
JH
435 if (!strcasecmp(value, "false")
436 || !strcasecmp(value, "no")
437 || !strcasecmp(value, "off"))
17712991 438 return 0;
8420ccd8
JH
439 return -1;
440}
441
b2be2f6a
JK
442int git_config_maybe_bool(const char *name, const char *value)
443{
db6195ef 444 long v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
445 if (0 <= v)
446 return v;
db6195ef
JK
447 if (git_parse_long(value, &v))
448 return !!v;
b2be2f6a
JK
449 return -1;
450}
451
8420ccd8
JH
452int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
453{
b2be2f6a 454 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
455 if (0 <= v) {
456 *is_bool = 1;
457 return v;
458 }
a53f2ec6 459 *is_bool = 0;
c35b0b58 460 return git_config_int(name, value);
17712991
LT
461}
462
a53f2ec6
JH
463int git_config_bool(const char *name, const char *value)
464{
465 int discard;
c35b0b58 466 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
467}
468
ea5105a5
CC
469int git_config_string(const char **dest, const char *var, const char *value)
470{
471 if (!value)
472 return config_error_nonbool(var);
473 *dest = xstrdup(value);
474 return 0;
475}
476
395de250
MM
477int git_config_pathname(const char **dest, const char *var, const char *value)
478{
479 if (!value)
480 return config_error_nonbool(var);
481 *dest = expand_user_path(value);
482 if (!*dest)
483 die("Failed to expand user dir in: '%s'", value);
484 return 0;
485}
486
806e2ad7 487static int git_default_core_config(const char *var, const char *value)
17712991
LT
488{
489 /* This needs a better name */
490 if (!strcmp(var, "core.filemode")) {
491 trust_executable_bit = git_config_bool(var, value);
492 return 0;
493 }
1ce4790b
AR
494 if (!strcmp(var, "core.trustctime")) {
495 trust_ctime = git_config_bool(var, value);
496 return 0;
497 }
17712991 498
9378c161
JH
499 if (!strcmp(var, "core.quotepath")) {
500 quote_path_fully = git_config_bool(var, value);
501 return 0;
502 }
503
78a8d641
JS
504 if (!strcmp(var, "core.symlinks")) {
505 has_symlinks = git_config_bool(var, value);
506 return 0;
507 }
508
0a9b88b7
LT
509 if (!strcmp(var, "core.ignorecase")) {
510 ignore_case = git_config_bool(var, value);
511 return 0;
512 }
513
64589a03
JH
514 if (!strcmp(var, "core.attributesfile"))
515 return git_config_pathname(&git_attributes_file, var, value);
516
7d1864ce
JH
517 if (!strcmp(var, "core.bare")) {
518 is_bare_repository_cfg = git_config_bool(var, value);
519 return 0;
520 }
521
5f73076c
JH
522 if (!strcmp(var, "core.ignorestat")) {
523 assume_unchanged = git_config_bool(var, value);
524 return 0;
525 }
526
e388c738
JH
527 if (!strcmp(var, "core.prefersymlinkrefs")) {
528 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
529 return 0;
530 }
531
6de08ae6
SP
532 if (!strcmp(var, "core.logallrefupdates")) {
533 log_all_ref_updates = git_config_bool(var, value);
534 return 0;
535 }
536
2f8acdb3
JH
537 if (!strcmp(var, "core.warnambiguousrefs")) {
538 warn_ambiguous_refs = git_config_bool(var, value);
539 return 0;
540 }
541
a71f09fe 542 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
543 int abbrev = git_config_int(var, value);
544 if (abbrev < minimum_abbrev || abbrev > 40)
545 return -1;
546 default_abbrev = abbrev;
547 return 0;
548 }
549
960ccca6 550 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
551 int level = git_config_int(var, value);
552 if (level == -1)
553 level = Z_DEFAULT_COMPRESSION;
554 else if (level < 0 || level > Z_BEST_COMPRESSION)
555 die("bad zlib compression level %d", level);
556 zlib_compression_level = level;
960ccca6
DH
557 zlib_compression_seen = 1;
558 return 0;
559 }
560
561 if (!strcmp(var, "core.compression")) {
562 int level = git_config_int(var, value);
563 if (level == -1)
564 level = Z_DEFAULT_COMPRESSION;
565 else if (level < 0 || level > Z_BEST_COMPRESSION)
566 die("bad zlib compression level %d", level);
567 core_compression_level = level;
568 core_compression_seen = 1;
569 if (!zlib_compression_seen)
570 zlib_compression_level = level;
12f6c308
JBH
571 return 0;
572 }
573
60bb8b14 574 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 575 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 576 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
577
578 /* This value must be multiple of (pagesize * 2) */
579 packed_git_window_size /= pgsz_x2;
580 if (packed_git_window_size < 1)
581 packed_git_window_size = 1;
582 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
583 return 0;
584 }
585
15366280 586 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 587 big_file_threshold = git_config_ulong(var, value);
15366280
JH
588 return 0;
589 }
590
77ccc5bb 591 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 592 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
593 return 0;
594 }
595
18bdec11 596 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 597 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
598 return 0;
599 }
600
5f44324d
JH
601 if (!strcmp(var, "core.logpackaccess"))
602 return git_config_string(&log_pack_access, var, value);
603
6c510bee 604 if (!strcmp(var, "core.autocrlf")) {
d7f46334 605 if (value && !strcasecmp(value, "input")) {
ec70f52f 606 if (core_eol == EOL_CRLF)
942e7747 607 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 608 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
609 return 0;
610 }
6c510bee
LT
611 auto_crlf = git_config_bool(var, value);
612 return 0;
613 }
614
21e5ad50
SP
615 if (!strcmp(var, "core.safecrlf")) {
616 if (value && !strcasecmp(value, "warn")) {
617 safe_crlf = SAFE_CRLF_WARN;
618 return 0;
619 }
620 safe_crlf = git_config_bool(var, value);
621 return 0;
622 }
623
942e7747
EB
624 if (!strcmp(var, "core.eol")) {
625 if (value && !strcasecmp(value, "lf"))
ec70f52f 626 core_eol = EOL_LF;
942e7747 627 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 628 core_eol = EOL_CRLF;
942e7747 629 else if (value && !strcasecmp(value, "native"))
ec70f52f 630 core_eol = EOL_NATIVE;
942e7747 631 else
ec70f52f
JH
632 core_eol = EOL_UNSET;
633 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
634 return error("core.autocrlf=input conflicts with core.eol=crlf");
635 return 0;
636 }
637
a97a7468
JS
638 if (!strcmp(var, "core.notesref")) {
639 notes_ref_name = xstrdup(value);
640 return 0;
641 }
642
806e2ad7
LT
643 if (!strcmp(var, "core.pager"))
644 return git_config_string(&pager_program, var, value);
645
646 if (!strcmp(var, "core.editor"))
647 return git_config_string(&editor_program, var, value);
648
d3e7da89
AK
649 if (!strcmp(var, "core.askpass"))
650 return git_config_string(&askpass_program, var, value);
651
806e2ad7 652 if (!strcmp(var, "core.excludesfile"))
395de250 653 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
654
655 if (!strcmp(var, "core.whitespace")) {
656 if (!value)
657 return config_error_nonbool(var);
658 whitespace_rule_cfg = parse_whitespace_rule(value);
659 return 0;
660 }
661
aafe9fba
LT
662 if (!strcmp(var, "core.fsyncobjectfiles")) {
663 fsync_object_files = git_config_bool(var, value);
664 return 0;
665 }
666
671c9b7e
LT
667 if (!strcmp(var, "core.preloadindex")) {
668 core_preload_index = git_config_bool(var, value);
669 return 0;
670 }
671
348df166
JS
672 if (!strcmp(var, "core.createobject")) {
673 if (!strcmp(value, "rename"))
674 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
675 else if (!strcmp(value, "link"))
676 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
677 else
678 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
679 return 0;
680 }
681
08aefc9e
NTND
682 if (!strcmp(var, "core.sparsecheckout")) {
683 core_apply_sparse_checkout = git_config_bool(var, value);
684 return 0;
685 }
686
806e2ad7
LT
687 /* Add other config variables here and to Documentation/config.txt. */
688 return 0;
689}
690
d1364529 691static int git_default_user_config(const char *var, const char *value)
806e2ad7 692{
e1b10391 693 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
694 if (!value)
695 return config_error_nonbool(var);
817151e6 696 strlcpy(git_default_name, value, sizeof(git_default_name));
91c38a21 697 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
e1b10391
LT
698 return 0;
699 }
700
701 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
702 if (!value)
703 return config_error_nonbool(var);
817151e6 704 strlcpy(git_default_email, value, sizeof(git_default_email));
91c38a21 705 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
e1b10391
LT
706 return 0;
707 }
708
d1364529
LT
709 /* Add other config variables here and to Documentation/config.txt. */
710 return 0;
711}
712
1141f492 713static int git_default_i18n_config(const char *var, const char *value)
d1364529 714{
ea5105a5
CC
715 if (!strcmp(var, "i18n.commitencoding"))
716 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 717
ea5105a5
CC
718 if (!strcmp(var, "i18n.logoutputencoding"))
719 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 720
1141f492
LT
721 /* Add other config variables here and to Documentation/config.txt. */
722 return 0;
723}
039bc64e 724
1141f492
LT
725static int git_default_branch_config(const char *var, const char *value)
726{
9ed36cfa
JS
727 if (!strcmp(var, "branch.autosetupmerge")) {
728 if (value && !strcasecmp(value, "always")) {
729 git_branch_track = BRANCH_TRACK_ALWAYS;
730 return 0;
731 }
732 git_branch_track = git_config_bool(var, value);
733 return 0;
734 }
c998ae9b
DS
735 if (!strcmp(var, "branch.autosetuprebase")) {
736 if (!value)
737 return config_error_nonbool(var);
738 else if (!strcmp(value, "never"))
739 autorebase = AUTOREBASE_NEVER;
740 else if (!strcmp(value, "local"))
741 autorebase = AUTOREBASE_LOCAL;
742 else if (!strcmp(value, "remote"))
743 autorebase = AUTOREBASE_REMOTE;
744 else if (!strcmp(value, "always"))
745 autorebase = AUTOREBASE_ALWAYS;
746 else
747 return error("Malformed value for %s", var);
748 return 0;
749 }
a9cc857a 750
1ab661dd 751 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
752 return 0;
753}
754
52153747
FAG
755static int git_default_push_config(const char *var, const char *value)
756{
757 if (!strcmp(var, "push.default")) {
758 if (!value)
759 return config_error_nonbool(var);
760 else if (!strcmp(value, "nothing"))
761 push_default = PUSH_DEFAULT_NOTHING;
762 else if (!strcmp(value, "matching"))
763 push_default = PUSH_DEFAULT_MATCHING;
53c40311
JH
764 else if (!strcmp(value, "upstream"))
765 push_default = PUSH_DEFAULT_UPSTREAM;
766 else if (!strcmp(value, "tracking")) /* deprecated */
767 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
768 else if (!strcmp(value, "current"))
769 push_default = PUSH_DEFAULT_CURRENT;
770 else {
771 error("Malformed value for %s: %s", var, value);
772 return error("Must be one of nothing, matching, "
773 "tracking or current.");
774 }
775 return 0;
776 }
777
778 /* Add other config variables here and to Documentation/config.txt. */
779 return 0;
780}
781
d551a488
MSO
782static int git_default_mailmap_config(const char *var, const char *value)
783{
784 if (!strcmp(var, "mailmap.file"))
785 return git_config_string(&git_mailmap_file, var, value);
786
787 /* Add other config variables here and to Documentation/config.txt. */
788 return 0;
789}
790
1141f492
LT
791int git_default_config(const char *var, const char *value, void *dummy)
792{
793 if (!prefixcmp(var, "core."))
794 return git_default_core_config(var, value);
795
796 if (!prefixcmp(var, "user."))
797 return git_default_user_config(var, value);
798
799 if (!prefixcmp(var, "i18n."))
800 return git_default_i18n_config(var, value);
801
802 if (!prefixcmp(var, "branch."))
803 return git_default_branch_config(var, value);
804
52153747
FAG
805 if (!prefixcmp(var, "push."))
806 return git_default_push_config(var, value);
807
d551a488
MSO
808 if (!prefixcmp(var, "mailmap."))
809 return git_default_mailmap_config(var, value);
810
75194438
JK
811 if (!prefixcmp(var, "advice."))
812 return git_default_advice_config(var, value);
813
1141f492
LT
814 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
815 pager_use_color = git_config_bool(var,value);
816 return 0;
817 }
818
568508e7
JH
819 if (!strcmp(var, "pack.packsizelimit")) {
820 pack_size_limit_cfg = git_config_ulong(var, value);
821 return 0;
822 }
1141f492
LT
823 /* Add other config variables here and to Documentation/config.txt. */
824 return 0;
825}
826
ef90d6d4 827int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
828{
829 int ret;
4f629539 830 FILE *f = fopen(filename, "r");
17712991
LT
831
832 ret = -1;
833 if (f) {
924aaf3e
RJ
834 config_file top;
835
836 /* push config-file parsing state stack */
837 top.prev = cf;
838 top.f = f;
839 top.name = filename;
840 top.linenr = 1;
841 top.eof = 0;
842 strbuf_init(&top.value, 1024);
843 cf = &top;
844
ef90d6d4 845 ret = git_parse_file(fn, data);
924aaf3e
RJ
846
847 /* pop config-file parsing state stack */
848 strbuf_release(&top.value);
849 cf = top.prev;
850
17712991
LT
851 fclose(f);
852 }
853 return ret;
854}
10bea152 855
506b17b1
JS
856const char *git_etc_gitconfig(void)
857{
7f0e39fa 858 static const char *system_wide;
2de9de5e
SP
859 if (!system_wide)
860 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 861 return system_wide;
506b17b1
JS
862}
863
0ef37164 864int git_env_bool(const char *k, int def)
ab88c363
JK
865{
866 const char *v = getenv(k);
867 return v ? git_config_bool(k, v) : def;
868}
869
870int git_config_system(void)
871{
872 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
873}
874
dbdf5854 875int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 876{
aa387407 877 int ret = 0, found = 0;
dc871831 878 const char *home = NULL;
5f1a63e0 879
aa387407 880 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
dc871831
DB
881 ret += git_config_from_file(fn, git_etc_gitconfig(),
882 data);
aa387407
FC
883 found += 1;
884 }
5f1a63e0 885
dc871831 886 home = getenv("HOME");
8f323c00 887 if (home) {
05bab3ea
RJ
888 char buf[PATH_MAX];
889 char *user_config = mksnpath(buf, sizeof(buf), "%s/.gitconfig", home);
aa387407 890 if (!access(user_config, R_OK)) {
dc871831 891 ret += git_config_from_file(fn, user_config, data);
aa387407
FC
892 found += 1;
893 }
5f1a63e0
JS
894 }
895
dbdf5854 896 if (repo_config && !access(repo_config, R_OK)) {
aa387407
FC
897 ret += git_config_from_file(fn, repo_config, data);
898 found += 1;
899 }
8b1fa778 900
5a0c9eeb
JK
901 switch (git_config_from_parameters(fn, data)) {
902 case -1: /* error */
1c2c9bee 903 die("unable to parse command-line config");
5a0c9eeb
JK
904 break;
905 case 0: /* found nothing */
906 break;
907 default: /* found at least one item */
908 found++;
909 break;
910 }
8b1fa778 911
1f2baa78 912 return ret == 0 ? found : ret;
4f629539
JH
913}
914
c9b5e2a5
JK
915int git_config_with_options(config_fn_t fn, void *data,
916 const char *filename)
dbdf5854
NTND
917{
918 char *repo_config = NULL;
919 int ret;
920
c9b5e2a5
JK
921 /*
922 * If we have a specific filename, use it. Otherwise, follow the
923 * regular lookup sequence.
924 */
925 if (filename)
926 return git_config_from_file(fn, filename, data);
927
dbdf5854
NTND
928 repo_config = git_pathdup("config");
929 ret = git_config_early(fn, data, repo_config);
930 if (repo_config)
931 free(repo_config);
932 return ret;
933}
934
c9b5e2a5
JK
935int git_config(config_fn_t fn, void *data)
936{
4a7bb5ba 937 return git_config_with_options(fn, data, NULL);
c9b5e2a5
JK
938}
939
10bea152
JS
940/*
941 * Find all the stuff for git_config_set() below.
942 */
4ddba79d
JS
943
944#define MAX_MATCHES 512
945
10bea152
JS
946static struct {
947 int baselen;
4b25d091 948 char *key;
f98d863d 949 int do_not_match;
4b25d091 950 regex_t *value_regex;
4ddba79d 951 int multi_replace;
dc49cd76 952 size_t offset[MAX_MATCHES];
10bea152
JS
953 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
954 int seen;
955} store;
956
4b25d091 957static int matches(const char *key, const char *value)
f98d863d
JS
958{
959 return !strcmp(key, store.key) &&
960 (store.value_regex == NULL ||
961 (store.do_not_match ^
962 !regexec(store.value_regex, value, 0, NULL, 0)));
963}
964
4b25d091 965static int store_aux(const char *key, const char *value, void *cb)
10bea152 966{
ae9ee41d
JH
967 const char *ep;
968 size_t section_len;
924aaf3e 969 FILE *f = cf->f;
ae9ee41d 970
10bea152
JS
971 switch (store.state) {
972 case KEY_SEEN:
f98d863d 973 if (matches(key, value)) {
4ddba79d 974 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 975 warning("%s has multiple values", key);
4ddba79d 976 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 977 error("too many matches for %s", key);
4ddba79d 978 return 1;
10bea152 979 }
4ddba79d 980
924aaf3e 981 store.offset[store.seen] = ftell(f);
10bea152
JS
982 store.seen++;
983 }
984 break;
985 case SECTION_SEEN:
ae9ee41d
JH
986 /*
987 * What we are looking for is in store.key (both
988 * section and var), and its section part is baselen
989 * long. We found key (again, both section and var).
990 * We would want to know if this key is in the same
991 * section as what we are looking for. We already
992 * know we are in the same section as what should
993 * hold store.key.
994 */
995 ep = strrchr(key, '.');
996 section_len = ep - key;
997
998 if ((section_len != store.baselen) ||
999 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1000 store.state = SECTION_END_SEEN;
1001 break;
ae9ee41d
JH
1002 }
1003
1004 /*
1005 * Do not increment matches: this is no match, but we
1006 * just made sure we are in the desired section.
1007 */
924aaf3e 1008 store.offset[store.seen] = ftell(f);
10bea152
JS
1009 /* fallthru */
1010 case SECTION_END_SEEN:
1011 case START:
f98d863d 1012 if (matches(key, value)) {
924aaf3e 1013 store.offset[store.seen] = ftell(f);
10bea152
JS
1014 store.state = KEY_SEEN;
1015 store.seen++;
d14f7764
LT
1016 } else {
1017 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1018 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1019 store.state = SECTION_SEEN;
924aaf3e 1020 store.offset[store.seen] = ftell(f);
d14f7764 1021 }
bdf0ef08 1022 }
10bea152
JS
1023 }
1024 return 0;
1025}
1026
64c0d71c 1027static int write_error(const char *filename)
480c9e52 1028{
64c0d71c 1029 error("failed to write new configuration file %s", filename);
480c9e52
AW
1030
1031 /* Same error code as "failed to rename". */
1032 return 4;
1033}
1034
4b25d091 1035static int store_write_section(int fd, const char *key)
10bea152 1036{
cb891a59
KH
1037 const char *dot;
1038 int i, success;
f285a2d7 1039 struct strbuf sb = STRBUF_INIT;
d14f7764 1040
cb891a59 1041 dot = memchr(key, '.', store.baselen);
d14f7764 1042 if (dot) {
cb891a59
KH
1043 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1044 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1045 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1046 strbuf_addch(&sb, '\\');
1047 strbuf_addch(&sb, key[i]);
d14f7764 1048 }
cb891a59
KH
1049 strbuf_addstr(&sb, "\"]\n");
1050 } else {
1051 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1052 }
1053
cb891a59
KH
1054 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1055 strbuf_release(&sb);
480c9e52 1056
cb891a59 1057 return success;
10bea152
JS
1058}
1059
4b25d091 1060static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1061{
cb891a59
KH
1062 int i, success;
1063 int length = strlen(key + store.baselen + 1);
1064 const char *quote = "";
f285a2d7 1065 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1066
6281f394
JM
1067 /*
1068 * Check to see if the value needs to be surrounded with a dq pair.
1069 * Note that problematic characters are always backslash-quoted; this
1070 * check is about not losing leading or trailing SP and strings that
1071 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1072 * configuration parser.
1073 */
cdd4fb15 1074 if (value[0] == ' ')
cb891a59 1075 quote = "\"";
cdd4fb15
BG
1076 for (i = 0; value[i]; i++)
1077 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1078 quote = "\"";
1079 if (i && value[i - 1] == ' ')
1080 quote = "\"";
1081
cb891a59
KH
1082 strbuf_addf(&sb, "\t%.*s = %s",
1083 length, key + store.baselen + 1, quote);
10bea152 1084
10bea152
JS
1085 for (i = 0; value[i]; i++)
1086 switch (value[i]) {
480c9e52 1087 case '\n':
cb891a59 1088 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1089 break;
1090 case '\t':
cb891a59 1091 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1092 break;
1093 case '"':
1094 case '\\':
cb891a59 1095 strbuf_addch(&sb, '\\');
480c9e52 1096 default:
cb891a59 1097 strbuf_addch(&sb, value[i]);
480c9e52
AW
1098 break;
1099 }
cb891a59
KH
1100 strbuf_addf(&sb, "%s\n", quote);
1101
1102 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1103 strbuf_release(&sb);
1104
1105 return success;
10bea152
JS
1106}
1107
4b25d091
FC
1108static ssize_t find_beginning_of_line(const char *contents, size_t size,
1109 size_t offset_, int *found_bracket)
4ddba79d 1110{
dc49cd76
SP
1111 size_t equal_offset = size, bracket_offset = size;
1112 ssize_t offset;
4ddba79d 1113
7a31cc0f 1114contline:
a6080a0a 1115 for (offset = offset_-2; offset > 0
4ddba79d
JS
1116 && contents[offset] != '\n'; offset--)
1117 switch (contents[offset]) {
1118 case '=': equal_offset = offset; break;
1119 case ']': bracket_offset = offset; break;
1120 }
7a31cc0f
FL
1121 if (offset > 0 && contents[offset-1] == '\\') {
1122 offset_ = offset;
1123 goto contline;
1124 }
4ddba79d
JS
1125 if (bracket_offset < equal_offset) {
1126 *found_bracket = 1;
1127 offset = bracket_offset+1;
1128 } else
1129 offset++;
1130
1131 return offset;
1132}
1133
5ec31182
RR
1134int git_config_set_in_file(const char *config_filename,
1135 const char *key, const char *value)
1136{
1137 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1138}
1139
4b25d091 1140int git_config_set(const char *key, const char *value)
10bea152 1141{
4ddba79d 1142 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1143}
1144
b09c53a3
LP
1145/*
1146 * Auxiliary function to sanity-check and split the key into the section
1147 * identifier and variable name.
1148 *
1149 * Returns 0 on success, -1 when there is an invalid character in the key and
1150 * -2 if there is no section name in the key.
1151 *
1152 * store_key - pointer to char* which will hold a copy of the key with
1153 * lowercase section and variable name
1154 * baselen - pointer to int which will hold the length of the
1155 * section + subsection part, can be NULL
1156 */
1157int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1158{
1159 int i, dot, baselen;
1160 const char *last_dot = strrchr(key, '.');
1161
1162 /*
1163 * Since "key" actually contains the section name and the real
1164 * key name separated by a dot, we have to know where the dot is.
1165 */
1166
2169ddc0 1167 if (last_dot == NULL || last_dot == key) {
b09c53a3 1168 error("key does not contain a section: %s", key);
7a397419 1169 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1170 }
1171
2169ddc0
LP
1172 if (!last_dot[1]) {
1173 error("key does not contain variable name: %s", key);
7a397419 1174 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1175 }
1176
b09c53a3
LP
1177 baselen = last_dot - key;
1178 if (baselen_)
1179 *baselen_ = baselen;
1180
1181 /*
1182 * Validate the key and while at it, lower case it for matching.
1183 */
1184 *store_key = xmalloc(strlen(key) + 1);
1185
1186 dot = 0;
1187 for (i = 0; key[i]; i++) {
1188 unsigned char c = key[i];
1189 if (c == '.')
1190 dot = 1;
1191 /* Leave the extended basename untouched.. */
1192 if (!dot || i > baselen) {
1193 if (!iskeychar(c) ||
1194 (i == baselen + 1 && !isalpha(c))) {
1195 error("invalid key: %s", key);
1196 goto out_free_ret_1;
1197 }
1198 c = tolower(c);
1199 } else if (c == '\n') {
1200 error("invalid key (newline): %s", key);
1201 goto out_free_ret_1;
1202 }
1203 (*store_key)[i] = c;
1204 }
1205 (*store_key)[i] = 0;
1206
1207 return 0;
1208
1209out_free_ret_1:
1210 free(*store_key);
7a397419 1211 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1212}
1213
10bea152
JS
1214/*
1215 * If value==NULL, unset in (remove from) config,
1216 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1217 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1218 * else all matching key/values (regardless how many) are removed,
1219 * before the new pair is written.
10bea152
JS
1220 *
1221 * Returns 0 on success.
1222 *
1223 * This function does this:
1224 *
1225 * - it locks the config file by creating ".git/config.lock"
1226 *
1227 * - it then parses the config using store_aux() as validator to find
1228 * the position on the key/value pair to replace. If it is to be unset,
1229 * it must be found exactly once.
1230 *
1231 * - the config file is mmap()ed and the part before the match (if any) is
1232 * written to the lock file, then the changed part and the rest.
1233 *
1234 * - the config file is removed and the lock file rename()d to it.
1235 *
1236 */
5ec31182
RR
1237int git_config_set_multivar_in_file(const char *config_filename,
1238 const char *key, const char *value,
1239 const char *value_regex, int multi_replace)
10bea152 1240{
f8ba655e 1241 int fd = -1, in_fd;
dafc88b1 1242 int ret;
6cbf973c 1243 struct lock_file *lock = NULL;
0a5f5759 1244 char *filename_buf = NULL;
4ddba79d 1245
b09c53a3
LP
1246 /* parse-key returns negative; flip the sign to feed exit(3) */
1247 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1248 if (ret)
dafc88b1 1249 goto out_free;
b17e659d
JS
1250
1251 store.multi_replace = multi_replace;
10bea152 1252
0a5f5759
JK
1253 if (!config_filename)
1254 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1255
1256 /*
6cbf973c 1257 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1258 * contents of .git/config will be written into it.
1259 */
6cbf973c
BS
1260 lock = xcalloc(sizeof(struct lock_file), 1);
1261 fd = hold_lock_file_for_update(lock, config_filename, 0);
1262 if (fd < 0) {
6ffd567b 1263 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1264 free(store.key);
7a397419 1265 ret = CONFIG_NO_LOCK;
dafc88b1 1266 goto out_free;
10bea152
JS
1267 }
1268
1269 /*
1270 * If .git/config does not exist yet, write a minimal version.
1271 */
88fb958b
AR
1272 in_fd = open(config_filename, O_RDONLY);
1273 if ( in_fd < 0 ) {
10bea152
JS
1274 free(store.key);
1275
88fb958b
AR
1276 if ( ENOENT != errno ) {
1277 error("opening %s: %s", config_filename,
1278 strerror(errno));
7a397419 1279 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1280 goto out_free;
88fb958b 1281 }
10bea152
JS
1282 /* if nothing to unset, error out */
1283 if (value == NULL) {
7a397419 1284 ret = CONFIG_NOTHING_SET;
dafc88b1 1285 goto out_free;
10bea152
JS
1286 }
1287
4b25d091 1288 store.key = (char *)key;
480c9e52 1289 if (!store_write_section(fd, key) ||
93c1e079
JH
1290 !store_write_pair(fd, key, value))
1291 goto write_err_out;
1292 } else {
88fb958b 1293 struct stat st;
4b25d091 1294 char *contents;
dc49cd76
SP
1295 size_t contents_sz, copy_begin, copy_end;
1296 int i, new_line = 0;
10bea152
JS
1297
1298 if (value_regex == NULL)
1299 store.value_regex = NULL;
1300 else {
f98d863d
JS
1301 if (value_regex[0] == '!') {
1302 store.do_not_match = 1;
1303 value_regex++;
1304 } else
1305 store.do_not_match = 0;
1306
2d7320d0 1307 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1308 if (regcomp(store.value_regex, value_regex,
1309 REG_EXTENDED)) {
64c0d71c 1310 error("invalid pattern: %s", value_regex);
10bea152 1311 free(store.value_regex);
7a397419 1312 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1313 goto out_free;
10bea152
JS
1314 }
1315 }
1316
4ddba79d 1317 store.offset[0] = 0;
10bea152
JS
1318 store.state = START;
1319 store.seen = 0;
1320
1321 /*
1322 * After this, store.offset will contain the *end* offset
1323 * of the last match, or remain at 0 if no match was found.
1324 * As a side effect, we make sure to transform only a valid
1325 * existing config file.
1326 */
ef90d6d4 1327 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1328 error("invalid config file %s", config_filename);
10bea152
JS
1329 free(store.key);
1330 if (store.value_regex != NULL) {
1331 regfree(store.value_regex);
1332 free(store.value_regex);
1333 }
7a397419 1334 ret = CONFIG_INVALID_FILE;
dafc88b1 1335 goto out_free;
10bea152
JS
1336 }
1337
1338 free(store.key);
1339 if (store.value_regex != NULL) {
1340 regfree(store.value_regex);
1341 free(store.value_regex);
1342 }
1343
4ddba79d
JS
1344 /* if nothing to unset, or too many matches, error out */
1345 if ((store.seen == 0 && value == NULL) ||
1346 (store.seen > 1 && multi_replace == 0)) {
7a397419 1347 ret = CONFIG_NOTHING_SET;
dafc88b1 1348 goto out_free;
10bea152
JS
1349 }
1350
88fb958b 1351 fstat(in_fd, &st);
dc49cd76
SP
1352 contents_sz = xsize_t(st.st_size);
1353 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1354 MAP_PRIVATE, in_fd, 0);
1355 close(in_fd);
1356
4ddba79d
JS
1357 if (store.seen == 0)
1358 store.seen = 1;
1359
1360 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1361 if (store.offset[i] == 0) {
dc49cd76 1362 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1363 } else if (store.state != KEY_SEEN) {
1364 copy_end = store.offset[i];
10bea152 1365 } else
4ddba79d 1366 copy_end = find_beginning_of_line(
dc49cd76 1367 contents, contents_sz,
4ddba79d
JS
1368 store.offset[i]-2, &new_line);
1369
02e5ba4a
JK
1370 if (copy_end > 0 && contents[copy_end-1] != '\n')
1371 new_line = 1;
1372
4ddba79d
JS
1373 /* write the first part of the config */
1374 if (copy_end > copy_begin) {
93c1e079
JH
1375 if (write_in_full(fd, contents + copy_begin,
1376 copy_end - copy_begin) <
1377 copy_end - copy_begin)
1378 goto write_err_out;
1379 if (new_line &&
2b7ca830 1380 write_str_in_full(fd, "\n") != 1)
93c1e079 1381 goto write_err_out;
4ddba79d
JS
1382 }
1383 copy_begin = store.offset[i];
10bea152
JS
1384 }
1385
10bea152
JS
1386 /* write the pair (value == NULL means unset) */
1387 if (value != NULL) {
93c1e079
JH
1388 if (store.state == START) {
1389 if (!store_write_section(fd, key))
1390 goto write_err_out;
480c9e52 1391 }
93c1e079
JH
1392 if (!store_write_pair(fd, key, value))
1393 goto write_err_out;
10bea152
JS
1394 }
1395
1396 /* write the rest of the config */
dc49cd76 1397 if (copy_begin < contents_sz)
93c1e079 1398 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1399 contents_sz - copy_begin) <
1400 contents_sz - copy_begin)
93c1e079 1401 goto write_err_out;
10bea152 1402
dc49cd76 1403 munmap(contents, contents_sz);
10bea152
JS
1404 }
1405
4ed7cd3a 1406 if (commit_lock_file(lock) < 0) {
64c0d71c 1407 error("could not commit config file %s", config_filename);
7a397419 1408 ret = CONFIG_NO_WRITE;
dafc88b1 1409 goto out_free;
10bea152
JS
1410 }
1411
6cbf973c
BS
1412 /*
1413 * lock is committed, so don't try to roll it back below.
1414 * NOTE: Since lockfile.c keeps a linked list of all created
1415 * lock_file structures, it isn't safe to free(lock). It's
1416 * better to just leave it hanging around.
1417 */
1418 lock = NULL;
dafc88b1
SH
1419 ret = 0;
1420
1421out_free:
6cbf973c
BS
1422 if (lock)
1423 rollback_lock_file(lock);
0a5f5759 1424 free(filename_buf);
dafc88b1 1425 return ret;
93c1e079
JH
1426
1427write_err_out:
64c0d71c 1428 ret = write_error(lock->filename);
93c1e079
JH
1429 goto out_free;
1430
10bea152
JS
1431}
1432
5ec31182
RR
1433int git_config_set_multivar(const char *key, const char *value,
1434 const char *value_regex, int multi_replace)
1435{
4a7bb5ba 1436 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1437 multi_replace);
5ec31182
RR
1438}
1439
118f8b24
PB
1440static int section_name_match (const char *buf, const char *name)
1441{
1442 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1443 if (buf[i] != '[')
1444 return 0;
1445 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1446 if (!dot && isspace(buf[i])) {
1447 dot = 1;
1448 if (name[j++] != '.')
1449 break;
1450 for (i++; isspace(buf[i]); i++)
1451 ; /* do nothing */
1452 if (buf[i] != '"')
1453 break;
1454 continue;
1455 }
1456 if (buf[i] == '\\' && dot)
1457 i++;
1458 else if (buf[i] == '"' && dot) {
1459 for (i++; isspace(buf[i]); i++)
1460 ; /* do_nothing */
1461 break;
1462 }
1463 if (buf[i] != name[j++])
1464 break;
1465 }
a4c0d463
AV
1466 if (buf[i] == ']' && name[j] == 0) {
1467 /*
1468 * We match, now just find the right length offset by
1469 * gobbling up any whitespace after it, as well
1470 */
1471 i++;
1472 for (; buf[i] && isspace(buf[i]); i++)
1473 ; /* do nothing */
1474 return i;
1475 }
1476 return 0;
118f8b24
PB
1477}
1478
1479/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1480int git_config_rename_section_in_file(const char *config_filename,
1481 const char *old_name, const char *new_name)
0667fcfb 1482{
118f8b24 1483 int ret = 0, remove = 0;
42bd39b5 1484 char *filename_buf = NULL;
0667fcfb
JS
1485 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1486 int out_fd;
1487 char buf[1024];
924aaf3e 1488 FILE *config_file;
0667fcfb 1489
42bd39b5
JK
1490 if (!config_filename)
1491 config_filename = filename_buf = git_pathdup("config");
1492
0667fcfb 1493 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1494 if (out_fd < 0) {
64c0d71c 1495 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1496 goto out;
1497 }
0667fcfb 1498
fc1905bb 1499 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1500 /* no config file means nothing to rename, no error */
1501 goto unlock_and_out;
fc1905bb 1502 }
0667fcfb
JS
1503
1504 while (fgets(buf, sizeof(buf), config_file)) {
1505 int i;
480c9e52 1506 int length;
9a5abfc7 1507 char *output = buf;
0667fcfb
JS
1508 for (i = 0; buf[i] && isspace(buf[i]); i++)
1509 ; /* do nothing */
1510 if (buf[i] == '[') {
1511 /* it's a section */
a4c0d463
AV
1512 int offset = section_name_match(&buf[i], old_name);
1513 if (offset > 0) {
118f8b24
PB
1514 ret++;
1515 if (new_name == NULL) {
1516 remove = 1;
0667fcfb
JS
1517 continue;
1518 }
0667fcfb 1519 store.baselen = strlen(new_name);
480c9e52 1520 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1521 ret = write_error(lock->filename);
480c9e52
AW
1522 goto out;
1523 }
9a5abfc7
AV
1524 /*
1525 * We wrote out the new section, with
1526 * a newline, now skip the old
1527 * section's length
1528 */
1529 output += offset + i;
1530 if (strlen(output) > 0) {
1531 /*
1532 * More content means there's
1533 * a declaration to put on the
1534 * next line; indent with a
1535 * tab
1536 */
1537 output -= 1;
1538 output[0] = '\t';
1539 }
0667fcfb 1540 }
118f8b24 1541 remove = 0;
0667fcfb 1542 }
118f8b24
PB
1543 if (remove)
1544 continue;
9a5abfc7
AV
1545 length = strlen(output);
1546 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1547 ret = write_error(lock->filename);
480c9e52
AW
1548 goto out;
1549 }
0667fcfb 1550 }
fc1905bb 1551 fclose(config_file);
8b590075 1552unlock_and_out:
4ed7cd3a 1553 if (commit_lock_file(lock) < 0)
64c0d71c 1554 ret = error("could not commit config file %s", config_filename);
8b590075 1555out:
42bd39b5 1556 free(filename_buf);
0667fcfb
JS
1557 return ret;
1558}
40ea4ed9 1559
42bd39b5
JK
1560int git_config_rename_section(const char *old_name, const char *new_name)
1561{
4a7bb5ba 1562 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1563}
1564
40ea4ed9
JH
1565/*
1566 * Call this to report error for your variable that should not
1567 * get a boolean value (i.e. "[my] var" means "true").
1568 */
1569int config_error_nonbool(const char *var)
1570{
1571 return error("Missing value for '%s'", var);
1572}