Merge branch 'jc/i18n-shell-script-gettext'
[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
9b25a0b5
JK
29#define MAX_INCLUDE_DEPTH 10
30static const char include_depth_advice[] =
31"exceeded maximum include depth (%d) while including\n"
32" %s\n"
33"from\n"
34" %s\n"
35"Do you have circular includes?";
36static int handle_path_include(const char *path, struct config_include_data *inc)
37{
38 int ret = 0;
39 struct strbuf buf = STRBUF_INIT;
40
41 /*
42 * Use an absolute path as-is, but interpret relative paths
43 * based on the including config file.
44 */
45 if (!is_absolute_path(path)) {
46 char *slash;
47
48 if (!cf || !cf->name)
49 return error("relative config includes must come from files");
50
51 slash = find_last_dir_sep(cf->name);
52 if (slash)
53 strbuf_add(&buf, cf->name, slash - cf->name + 1);
54 strbuf_addstr(&buf, path);
55 path = buf.buf;
56 }
57
58 if (!access(path, R_OK)) {
59 if (++inc->depth > MAX_INCLUDE_DEPTH)
60 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
61 cf && cf->name ? cf->name : "the command line");
62 ret = git_config_from_file(git_config_include, path, inc);
63 inc->depth--;
64 }
65 strbuf_release(&buf);
66 return ret;
67}
68
69int git_config_include(const char *var, const char *value, void *data)
70{
71 struct config_include_data *inc = data;
72 const char *type;
73 int ret;
74
75 /*
76 * Pass along all values, including "include" directives; this makes it
77 * possible to query information on the includes themselves.
78 */
79 ret = inc->fn(var, value, inc->data);
80 if (ret < 0)
81 return ret;
82
83 type = skip_prefix(var, "include.");
84 if (!type)
85 return ret;
86
87 if (!strcmp(type, "path"))
88 ret = handle_path_include(value, inc);
89 return ret;
90}
91
8b1fa778
AR
92static void lowercase(char *p)
93{
94 for (; *p; p++)
95 *p = tolower(*p);
96}
8b1fa778 97
2b64fc89
JK
98void git_config_push_parameter(const char *text)
99{
100 struct strbuf env = STRBUF_INIT;
101 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
102 if (old) {
103 strbuf_addstr(&env, old);
104 strbuf_addch(&env, ' ');
105 }
106 sq_quote_buf(&env, text);
107 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
108 strbuf_release(&env);
109}
110
2496844b
JK
111int git_config_parse_parameter(const char *text,
112 config_fn_t fn, void *data)
8b1fa778 113{
572e4f6a 114 struct strbuf **pair;
f77bccae 115 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
116 if (!pair[0])
117 return error("bogus config parameter: %s", text);
572e4f6a
AR
118 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
119 strbuf_setlen(pair[0], pair[0]->len - 1);
120 strbuf_trim(pair[0]);
121 if (!pair[0]->len) {
122 strbuf_list_free(pair);
06eb708f 123 return error("bogus config parameter: %s", text);
8b1fa778 124 }
06eb708f
JK
125 lowercase(pair[0]->buf);
126 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
127 strbuf_list_free(pair);
128 return -1;
572e4f6a
AR
129 }
130 strbuf_list_free(pair);
8b1fa778
AR
131 return 0;
132}
133
06eb708f
JK
134int git_config_from_parameters(config_fn_t fn, void *data)
135{
2b64fc89
JK
136 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
137 char *envw;
138 const char **argv = NULL;
139 int nr = 0, alloc = 0;
140 int i;
141
142 if (!env)
143 return 0;
144 /* sq_dequote will write over it */
145 envw = xstrdup(env);
146
147 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
148 free(envw);
149 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
150 }
151
152 for (i = 0; i < nr; i++) {
06eb708f 153 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
154 free(argv);
155 free(envw);
156 return -1;
157 }
158 }
159
160 free(argv);
161 free(envw);
06eb708f 162 return nr > 0;
2b64fc89
JK
163}
164
17712991
LT
165static int get_next_char(void)
166{
167 int c;
168 FILE *f;
169
170 c = '\n';
924aaf3e 171 if (cf && ((f = cf->f) != NULL)) {
17712991 172 c = fgetc(f);
db2c075d
JH
173 if (c == '\r') {
174 /* DOS like systems */
175 c = fgetc(f);
176 if (c != '\n') {
177 ungetc(c, f);
178 c = '\r';
179 }
180 }
17712991 181 if (c == '\n')
924aaf3e 182 cf->linenr++;
17712991 183 if (c == EOF) {
924aaf3e 184 cf->eof = 1;
17712991
LT
185 c = '\n';
186 }
187 }
188 return c;
189}
190
191static char *parse_value(void)
192{
e96c19c5 193 int quote = 0, comment = 0, space = 0;
17712991 194
924aaf3e 195 strbuf_reset(&cf->value);
17712991
LT
196 for (;;) {
197 int c = get_next_char();
17712991 198 if (c == '\n') {
4b340593
MS
199 if (quote) {
200 cf->linenr--;
17712991 201 return NULL;
4b340593 202 }
924aaf3e 203 return cf->value.buf;
17712991
LT
204 }
205 if (comment)
206 continue;
207 if (isspace(c) && !quote) {
924aaf3e 208 if (cf->value.len)
ebdaae37 209 space++;
17712991
LT
210 continue;
211 }
7ebdba61
JS
212 if (!quote) {
213 if (c == ';' || c == '#') {
214 comment = 1;
215 continue;
216 }
217 }
ebdaae37 218 for (; space; space--)
924aaf3e 219 strbuf_addch(&cf->value, ' ');
17712991
LT
220 if (c == '\\') {
221 c = get_next_char();
222 switch (c) {
223 case '\n':
224 continue;
225 case 't':
226 c = '\t';
227 break;
228 case 'b':
229 c = '\b';
230 break;
231 case 'n':
232 c = '\n';
233 break;
5cbb401d
LT
234 /* Some characters escape as themselves */
235 case '\\': case '"':
236 break;
237 /* Reject unknown escape sequences */
238 default:
239 return NULL;
17712991 240 }
924aaf3e 241 strbuf_addch(&cf->value, c);
17712991
LT
242 continue;
243 }
244 if (c == '"') {
245 quote = 1-quote;
246 continue;
247 }
924aaf3e 248 strbuf_addch(&cf->value, c);
17712991
LT
249 }
250}
251
38c5afa8
LT
252static inline int iskeychar(int c)
253{
254 return isalnum(c) || c == '-';
255}
256
ef90d6d4 257static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
258{
259 int c;
260 char *value;
261
262 /* Get the full name */
263 for (;;) {
264 c = get_next_char();
924aaf3e 265 if (cf->eof)
17712991 266 break;
38c5afa8 267 if (!iskeychar(c))
17712991
LT
268 break;
269 name[len++] = tolower(c);
270 if (len >= MAXNAME)
271 return -1;
272 }
273 name[len] = 0;
274 while (c == ' ' || c == '\t')
275 c = get_next_char();
276
277 value = NULL;
278 if (c != '\n') {
279 if (c != '=')
280 return -1;
281 value = parse_value();
282 if (!value)
283 return -1;
284 }
ef90d6d4 285 return fn(name, value, data);
17712991
LT
286}
287
d14f7764
LT
288static int get_extended_base_var(char *name, int baselen, int c)
289{
290 do {
291 if (c == '\n')
4b340593 292 goto error_incomplete_line;
d14f7764
LT
293 c = get_next_char();
294 } while (isspace(c));
295
296 /* We require the format to be '[base "extension"]' */
297 if (c != '"')
298 return -1;
299 name[baselen++] = '.';
300
301 for (;;) {
302 int c = get_next_char();
303 if (c == '\n')
4b340593 304 goto error_incomplete_line;
d14f7764
LT
305 if (c == '"')
306 break;
307 if (c == '\\') {
308 c = get_next_char();
309 if (c == '\n')
4b340593 310 goto error_incomplete_line;
d14f7764
LT
311 }
312 name[baselen++] = c;
313 if (baselen > MAXNAME / 2)
314 return -1;
315 }
316
317 /* Final ']' */
318 if (get_next_char() != ']')
319 return -1;
320 return baselen;
4b340593
MS
321error_incomplete_line:
322 cf->linenr--;
323 return -1;
d14f7764
LT
324}
325
17712991
LT
326static int get_base_var(char *name)
327{
328 int baselen = 0;
329
330 for (;;) {
331 int c = get_next_char();
924aaf3e 332 if (cf->eof)
17712991
LT
333 return -1;
334 if (c == ']')
335 return baselen;
d14f7764
LT
336 if (isspace(c))
337 return get_extended_base_var(name, baselen, c);
38c5afa8 338 if (!iskeychar(c) && c != '.')
17712991
LT
339 return -1;
340 if (baselen > MAXNAME / 2)
341 return -1;
342 name[baselen++] = tolower(c);
343 }
344}
345
ef90d6d4 346static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
347{
348 int comment = 0;
349 int baselen = 0;
924aaf3e 350 char *var = cf->var;
17712991 351
de056402
PB
352 /* U+FEFF Byte Order Mark in UTF8 */
353 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
354 const unsigned char *bomptr = utf8_bom;
355
17712991
LT
356 for (;;) {
357 int c = get_next_char();
de056402
PB
358 if (bomptr && *bomptr) {
359 /* We are at the file beginning; skip UTF8-encoded BOM
360 * if present. Sane editors won't put this in on their
361 * own, but e.g. Windows Notepad will do it happily. */
362 if ((unsigned char) c == *bomptr) {
363 bomptr++;
364 continue;
365 } else {
366 /* Do not tolerate partial BOM. */
367 if (bomptr != utf8_bom)
368 break;
369 /* No BOM at file beginning. Cool. */
370 bomptr = NULL;
371 }
372 }
17712991 373 if (c == '\n') {
924aaf3e 374 if (cf->eof)
17712991
LT
375 return 0;
376 comment = 0;
377 continue;
378 }
379 if (comment || isspace(c))
380 continue;
381 if (c == '#' || c == ';') {
382 comment = 1;
383 continue;
384 }
385 if (c == '[') {
386 baselen = get_base_var(var);
387 if (baselen <= 0)
388 break;
389 var[baselen++] = '.';
390 var[baselen] = 0;
391 continue;
392 }
393 if (!isalpha(c))
394 break;
128af9d1 395 var[baselen] = tolower(c);
ef90d6d4 396 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
397 break;
398 }
924aaf3e 399 die("bad config file line %d in %s", cf->linenr, cf->name);
17712991
LT
400}
401
ebaa1bd4 402static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
403{
404 if (!*end)
405 return 1;
c8deb5a1
SP
406 else if (!strcasecmp(end, "k")) {
407 *val *= 1024;
408 return 1;
409 }
410 else if (!strcasecmp(end, "m")) {
411 *val *= 1024 * 1024;
412 return 1;
413 }
414 else if (!strcasecmp(end, "g")) {
415 *val *= 1024 * 1024 * 1024;
416 return 1;
417 }
418 return 0;
0b87b6e0
BD
419}
420
0433bcd9 421static int git_parse_long(const char *value, long *ret)
0b87b6e0
BD
422{
423 if (value && *value) {
424 char *end;
ebaa1bd4
NA
425 intmax_t val;
426 uintmax_t uval;
427 uintmax_t factor = 1;
428
429 errno = 0;
430 val = strtoimax(value, &end, 0);
431 if (errno == ERANGE)
432 return 0;
c8deb5a1
SP
433 if (!parse_unit_factor(end, &factor))
434 return 0;
ebaa1bd4
NA
435 uval = abs(val);
436 uval *= factor;
437 if ((uval > maximum_signed_value_of_type(long)) ||
438 (abs(val) > uval))
439 return 0;
440 val *= factor;
441 *ret = val;
0b87b6e0
BD
442 return 1;
443 }
444 return 0;
445}
446
447int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
448{
449 if (value && *value) {
450 char *end;
ebaa1bd4
NA
451 uintmax_t val;
452 uintmax_t oldval;
453
454 errno = 0;
455 val = strtoumax(value, &end, 0);
456 if (errno == ERANGE)
457 return 0;
458 oldval = val;
c8deb5a1
SP
459 if (!parse_unit_factor(end, &val))
460 return 0;
ebaa1bd4
NA
461 if ((val > maximum_unsigned_value_of_type(long)) ||
462 (oldval > val))
463 return 0;
c8deb5a1 464 *ret = val;
0b87b6e0 465 return 1;
17712991 466 }
0b87b6e0
BD
467 return 0;
468}
469
c1867cea
JK
470static void die_bad_config(const char *name)
471{
924aaf3e
RJ
472 if (cf && cf->name)
473 die("bad config value for '%s' in %s", name, cf->name);
c1867cea
JK
474 die("bad config value for '%s'", name);
475}
476
0b87b6e0
BD
477int git_config_int(const char *name, const char *value)
478{
0433bcd9 479 long ret = 0;
0b87b6e0 480 if (!git_parse_long(value, &ret))
c1867cea 481 die_bad_config(name);
0b87b6e0
BD
482 return ret;
483}
484
485unsigned long git_config_ulong(const char *name, const char *value)
486{
487 unsigned long ret;
488 if (!git_parse_ulong(value, &ret))
c1867cea 489 die_bad_config(name);
0b87b6e0 490 return ret;
17712991
LT
491}
492
b2be2f6a 493static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
494{
495 if (!value)
496 return 1;
497 if (!*value)
498 return 0;
8420ccd8
JH
499 if (!strcasecmp(value, "true")
500 || !strcasecmp(value, "yes")
501 || !strcasecmp(value, "on"))
17712991 502 return 1;
8420ccd8
JH
503 if (!strcasecmp(value, "false")
504 || !strcasecmp(value, "no")
505 || !strcasecmp(value, "off"))
17712991 506 return 0;
8420ccd8
JH
507 return -1;
508}
509
b2be2f6a
JK
510int git_config_maybe_bool(const char *name, const char *value)
511{
db6195ef 512 long v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
513 if (0 <= v)
514 return v;
db6195ef
JK
515 if (git_parse_long(value, &v))
516 return !!v;
b2be2f6a
JK
517 return -1;
518}
519
8420ccd8
JH
520int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
521{
b2be2f6a 522 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
523 if (0 <= v) {
524 *is_bool = 1;
525 return v;
526 }
a53f2ec6 527 *is_bool = 0;
c35b0b58 528 return git_config_int(name, value);
17712991
LT
529}
530
a53f2ec6
JH
531int git_config_bool(const char *name, const char *value)
532{
533 int discard;
c35b0b58 534 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
535}
536
ea5105a5
CC
537int git_config_string(const char **dest, const char *var, const char *value)
538{
539 if (!value)
540 return config_error_nonbool(var);
541 *dest = xstrdup(value);
542 return 0;
543}
544
395de250
MM
545int git_config_pathname(const char **dest, const char *var, const char *value)
546{
547 if (!value)
548 return config_error_nonbool(var);
549 *dest = expand_user_path(value);
550 if (!*dest)
551 die("Failed to expand user dir in: '%s'", value);
552 return 0;
553}
554
806e2ad7 555static int git_default_core_config(const char *var, const char *value)
17712991
LT
556{
557 /* This needs a better name */
558 if (!strcmp(var, "core.filemode")) {
559 trust_executable_bit = git_config_bool(var, value);
560 return 0;
561 }
1ce4790b
AR
562 if (!strcmp(var, "core.trustctime")) {
563 trust_ctime = git_config_bool(var, value);
564 return 0;
565 }
17712991 566
9378c161
JH
567 if (!strcmp(var, "core.quotepath")) {
568 quote_path_fully = git_config_bool(var, value);
569 return 0;
570 }
571
78a8d641
JS
572 if (!strcmp(var, "core.symlinks")) {
573 has_symlinks = git_config_bool(var, value);
574 return 0;
575 }
576
0a9b88b7
LT
577 if (!strcmp(var, "core.ignorecase")) {
578 ignore_case = git_config_bool(var, value);
579 return 0;
580 }
581
64589a03
JH
582 if (!strcmp(var, "core.attributesfile"))
583 return git_config_pathname(&git_attributes_file, var, value);
584
7d1864ce
JH
585 if (!strcmp(var, "core.bare")) {
586 is_bare_repository_cfg = git_config_bool(var, value);
587 return 0;
588 }
589
5f73076c
JH
590 if (!strcmp(var, "core.ignorestat")) {
591 assume_unchanged = git_config_bool(var, value);
592 return 0;
593 }
594
e388c738
JH
595 if (!strcmp(var, "core.prefersymlinkrefs")) {
596 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
597 return 0;
598 }
599
6de08ae6
SP
600 if (!strcmp(var, "core.logallrefupdates")) {
601 log_all_ref_updates = git_config_bool(var, value);
602 return 0;
603 }
604
2f8acdb3
JH
605 if (!strcmp(var, "core.warnambiguousrefs")) {
606 warn_ambiguous_refs = git_config_bool(var, value);
607 return 0;
608 }
609
a71f09fe 610 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
611 int abbrev = git_config_int(var, value);
612 if (abbrev < minimum_abbrev || abbrev > 40)
613 return -1;
614 default_abbrev = abbrev;
615 return 0;
616 }
617
960ccca6 618 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
619 int level = git_config_int(var, value);
620 if (level == -1)
621 level = Z_DEFAULT_COMPRESSION;
622 else if (level < 0 || level > Z_BEST_COMPRESSION)
623 die("bad zlib compression level %d", level);
624 zlib_compression_level = level;
960ccca6
DH
625 zlib_compression_seen = 1;
626 return 0;
627 }
628
629 if (!strcmp(var, "core.compression")) {
630 int level = git_config_int(var, value);
631 if (level == -1)
632 level = Z_DEFAULT_COMPRESSION;
633 else if (level < 0 || level > Z_BEST_COMPRESSION)
634 die("bad zlib compression level %d", level);
635 core_compression_level = level;
636 core_compression_seen = 1;
637 if (!zlib_compression_seen)
638 zlib_compression_level = level;
12f6c308
JBH
639 return 0;
640 }
641
60bb8b14 642 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 643 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 644 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
645
646 /* This value must be multiple of (pagesize * 2) */
647 packed_git_window_size /= pgsz_x2;
648 if (packed_git_window_size < 1)
649 packed_git_window_size = 1;
650 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
651 return 0;
652 }
653
15366280 654 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 655 big_file_threshold = git_config_ulong(var, value);
15366280
JH
656 return 0;
657 }
658
77ccc5bb 659 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 660 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
661 return 0;
662 }
663
18bdec11 664 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 665 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
666 return 0;
667 }
668
5f44324d
JH
669 if (!strcmp(var, "core.logpackaccess"))
670 return git_config_string(&log_pack_access, var, value);
671
6c510bee 672 if (!strcmp(var, "core.autocrlf")) {
d7f46334 673 if (value && !strcasecmp(value, "input")) {
ec70f52f 674 if (core_eol == EOL_CRLF)
942e7747 675 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 676 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
677 return 0;
678 }
6c510bee
LT
679 auto_crlf = git_config_bool(var, value);
680 return 0;
681 }
682
21e5ad50
SP
683 if (!strcmp(var, "core.safecrlf")) {
684 if (value && !strcasecmp(value, "warn")) {
685 safe_crlf = SAFE_CRLF_WARN;
686 return 0;
687 }
688 safe_crlf = git_config_bool(var, value);
689 return 0;
690 }
691
942e7747
EB
692 if (!strcmp(var, "core.eol")) {
693 if (value && !strcasecmp(value, "lf"))
ec70f52f 694 core_eol = EOL_LF;
942e7747 695 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 696 core_eol = EOL_CRLF;
942e7747 697 else if (value && !strcasecmp(value, "native"))
ec70f52f 698 core_eol = EOL_NATIVE;
942e7747 699 else
ec70f52f
JH
700 core_eol = EOL_UNSET;
701 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
702 return error("core.autocrlf=input conflicts with core.eol=crlf");
703 return 0;
704 }
705
a97a7468
JS
706 if (!strcmp(var, "core.notesref")) {
707 notes_ref_name = xstrdup(value);
708 return 0;
709 }
710
806e2ad7
LT
711 if (!strcmp(var, "core.pager"))
712 return git_config_string(&pager_program, var, value);
713
714 if (!strcmp(var, "core.editor"))
715 return git_config_string(&editor_program, var, value);
716
d3e7da89
AK
717 if (!strcmp(var, "core.askpass"))
718 return git_config_string(&askpass_program, var, value);
719
806e2ad7 720 if (!strcmp(var, "core.excludesfile"))
395de250 721 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
722
723 if (!strcmp(var, "core.whitespace")) {
724 if (!value)
725 return config_error_nonbool(var);
726 whitespace_rule_cfg = parse_whitespace_rule(value);
727 return 0;
728 }
729
aafe9fba
LT
730 if (!strcmp(var, "core.fsyncobjectfiles")) {
731 fsync_object_files = git_config_bool(var, value);
732 return 0;
733 }
734
671c9b7e
LT
735 if (!strcmp(var, "core.preloadindex")) {
736 core_preload_index = git_config_bool(var, value);
737 return 0;
738 }
739
348df166
JS
740 if (!strcmp(var, "core.createobject")) {
741 if (!strcmp(value, "rename"))
742 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
743 else if (!strcmp(value, "link"))
744 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
745 else
746 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
747 return 0;
748 }
749
08aefc9e
NTND
750 if (!strcmp(var, "core.sparsecheckout")) {
751 core_apply_sparse_checkout = git_config_bool(var, value);
752 return 0;
753 }
754
806e2ad7
LT
755 /* Add other config variables here and to Documentation/config.txt. */
756 return 0;
757}
758
d1364529 759static int git_default_user_config(const char *var, const char *value)
806e2ad7 760{
e1b10391 761 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
762 if (!value)
763 return config_error_nonbool(var);
817151e6 764 strlcpy(git_default_name, value, sizeof(git_default_name));
91c38a21 765 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
e1b10391
LT
766 return 0;
767 }
768
769 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
770 if (!value)
771 return config_error_nonbool(var);
817151e6 772 strlcpy(git_default_email, value, sizeof(git_default_email));
91c38a21 773 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
e1b10391
LT
774 return 0;
775 }
776
d1364529
LT
777 /* Add other config variables here and to Documentation/config.txt. */
778 return 0;
779}
780
1141f492 781static int git_default_i18n_config(const char *var, const char *value)
d1364529 782{
ea5105a5
CC
783 if (!strcmp(var, "i18n.commitencoding"))
784 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 785
ea5105a5
CC
786 if (!strcmp(var, "i18n.logoutputencoding"))
787 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 788
1141f492
LT
789 /* Add other config variables here and to Documentation/config.txt. */
790 return 0;
791}
039bc64e 792
1141f492
LT
793static int git_default_branch_config(const char *var, const char *value)
794{
9ed36cfa
JS
795 if (!strcmp(var, "branch.autosetupmerge")) {
796 if (value && !strcasecmp(value, "always")) {
797 git_branch_track = BRANCH_TRACK_ALWAYS;
798 return 0;
799 }
800 git_branch_track = git_config_bool(var, value);
801 return 0;
802 }
c998ae9b
DS
803 if (!strcmp(var, "branch.autosetuprebase")) {
804 if (!value)
805 return config_error_nonbool(var);
806 else if (!strcmp(value, "never"))
807 autorebase = AUTOREBASE_NEVER;
808 else if (!strcmp(value, "local"))
809 autorebase = AUTOREBASE_LOCAL;
810 else if (!strcmp(value, "remote"))
811 autorebase = AUTOREBASE_REMOTE;
812 else if (!strcmp(value, "always"))
813 autorebase = AUTOREBASE_ALWAYS;
814 else
815 return error("Malformed value for %s", var);
816 return 0;
817 }
a9cc857a 818
1ab661dd 819 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
820 return 0;
821}
822
52153747
FAG
823static int git_default_push_config(const char *var, const char *value)
824{
825 if (!strcmp(var, "push.default")) {
826 if (!value)
827 return config_error_nonbool(var);
828 else if (!strcmp(value, "nothing"))
829 push_default = PUSH_DEFAULT_NOTHING;
830 else if (!strcmp(value, "matching"))
831 push_default = PUSH_DEFAULT_MATCHING;
53c40311
JH
832 else if (!strcmp(value, "upstream"))
833 push_default = PUSH_DEFAULT_UPSTREAM;
834 else if (!strcmp(value, "tracking")) /* deprecated */
835 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
836 else if (!strcmp(value, "current"))
837 push_default = PUSH_DEFAULT_CURRENT;
838 else {
839 error("Malformed value for %s: %s", var, value);
840 return error("Must be one of nothing, matching, "
841 "tracking or current.");
842 }
843 return 0;
844 }
845
846 /* Add other config variables here and to Documentation/config.txt. */
847 return 0;
848}
849
d551a488
MSO
850static int git_default_mailmap_config(const char *var, const char *value)
851{
852 if (!strcmp(var, "mailmap.file"))
853 return git_config_string(&git_mailmap_file, var, value);
854
855 /* Add other config variables here and to Documentation/config.txt. */
856 return 0;
857}
858
1141f492
LT
859int git_default_config(const char *var, const char *value, void *dummy)
860{
861 if (!prefixcmp(var, "core."))
862 return git_default_core_config(var, value);
863
864 if (!prefixcmp(var, "user."))
865 return git_default_user_config(var, value);
866
867 if (!prefixcmp(var, "i18n."))
868 return git_default_i18n_config(var, value);
869
870 if (!prefixcmp(var, "branch."))
871 return git_default_branch_config(var, value);
872
52153747
FAG
873 if (!prefixcmp(var, "push."))
874 return git_default_push_config(var, value);
875
d551a488
MSO
876 if (!prefixcmp(var, "mailmap."))
877 return git_default_mailmap_config(var, value);
878
75194438
JK
879 if (!prefixcmp(var, "advice."))
880 return git_default_advice_config(var, value);
881
1141f492
LT
882 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
883 pager_use_color = git_config_bool(var,value);
884 return 0;
885 }
886
568508e7
JH
887 if (!strcmp(var, "pack.packsizelimit")) {
888 pack_size_limit_cfg = git_config_ulong(var, value);
889 return 0;
890 }
1141f492
LT
891 /* Add other config variables here and to Documentation/config.txt. */
892 return 0;
893}
894
ef90d6d4 895int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
896{
897 int ret;
4f629539 898 FILE *f = fopen(filename, "r");
17712991
LT
899
900 ret = -1;
901 if (f) {
924aaf3e
RJ
902 config_file top;
903
904 /* push config-file parsing state stack */
905 top.prev = cf;
906 top.f = f;
907 top.name = filename;
908 top.linenr = 1;
909 top.eof = 0;
910 strbuf_init(&top.value, 1024);
911 cf = &top;
912
ef90d6d4 913 ret = git_parse_file(fn, data);
924aaf3e
RJ
914
915 /* pop config-file parsing state stack */
916 strbuf_release(&top.value);
917 cf = top.prev;
918
17712991
LT
919 fclose(f);
920 }
921 return ret;
922}
10bea152 923
506b17b1
JS
924const char *git_etc_gitconfig(void)
925{
7f0e39fa 926 static const char *system_wide;
2de9de5e
SP
927 if (!system_wide)
928 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 929 return system_wide;
506b17b1
JS
930}
931
0ef37164 932int git_env_bool(const char *k, int def)
ab88c363
JK
933{
934 const char *v = getenv(k);
935 return v ? git_config_bool(k, v) : def;
936}
937
938int git_config_system(void)
939{
940 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
941}
942
dbdf5854 943int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 944{
aa387407 945 int ret = 0, found = 0;
dc871831 946 const char *home = NULL;
5f1a63e0 947
aa387407 948 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
dc871831
DB
949 ret += git_config_from_file(fn, git_etc_gitconfig(),
950 data);
aa387407
FC
951 found += 1;
952 }
5f1a63e0 953
dc871831 954 home = getenv("HOME");
8f323c00 955 if (home) {
05bab3ea
RJ
956 char buf[PATH_MAX];
957 char *user_config = mksnpath(buf, sizeof(buf), "%s/.gitconfig", home);
aa387407 958 if (!access(user_config, R_OK)) {
dc871831 959 ret += git_config_from_file(fn, user_config, data);
aa387407
FC
960 found += 1;
961 }
5f1a63e0
JS
962 }
963
dbdf5854 964 if (repo_config && !access(repo_config, R_OK)) {
aa387407
FC
965 ret += git_config_from_file(fn, repo_config, data);
966 found += 1;
967 }
8b1fa778 968
5a0c9eeb
JK
969 switch (git_config_from_parameters(fn, data)) {
970 case -1: /* error */
1c2c9bee 971 die("unable to parse command-line config");
5a0c9eeb
JK
972 break;
973 case 0: /* found nothing */
974 break;
975 default: /* found at least one item */
976 found++;
977 break;
978 }
8b1fa778 979
1f2baa78 980 return ret == 0 ? found : ret;
4f629539
JH
981}
982
c9b5e2a5 983int git_config_with_options(config_fn_t fn, void *data,
9b25a0b5 984 const char *filename, int respect_includes)
dbdf5854
NTND
985{
986 char *repo_config = NULL;
987 int ret;
9b25a0b5
JK
988 struct config_include_data inc = CONFIG_INCLUDE_INIT;
989
990 if (respect_includes) {
991 inc.fn = fn;
992 inc.data = data;
993 fn = git_config_include;
994 data = &inc;
995 }
dbdf5854 996
c9b5e2a5
JK
997 /*
998 * If we have a specific filename, use it. Otherwise, follow the
999 * regular lookup sequence.
1000 */
1001 if (filename)
1002 return git_config_from_file(fn, filename, data);
1003
dbdf5854
NTND
1004 repo_config = git_pathdup("config");
1005 ret = git_config_early(fn, data, repo_config);
1006 if (repo_config)
1007 free(repo_config);
1008 return ret;
1009}
1010
c9b5e2a5
JK
1011int git_config(config_fn_t fn, void *data)
1012{
9b25a0b5 1013 return git_config_with_options(fn, data, NULL, 1);
c9b5e2a5
JK
1014}
1015
10bea152
JS
1016/*
1017 * Find all the stuff for git_config_set() below.
1018 */
4ddba79d
JS
1019
1020#define MAX_MATCHES 512
1021
10bea152
JS
1022static struct {
1023 int baselen;
4b25d091 1024 char *key;
f98d863d 1025 int do_not_match;
4b25d091 1026 regex_t *value_regex;
4ddba79d 1027 int multi_replace;
dc49cd76 1028 size_t offset[MAX_MATCHES];
10bea152
JS
1029 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1030 int seen;
1031} store;
1032
4b25d091 1033static int matches(const char *key, const char *value)
f98d863d
JS
1034{
1035 return !strcmp(key, store.key) &&
1036 (store.value_regex == NULL ||
1037 (store.do_not_match ^
1038 !regexec(store.value_regex, value, 0, NULL, 0)));
1039}
1040
4b25d091 1041static int store_aux(const char *key, const char *value, void *cb)
10bea152 1042{
ae9ee41d
JH
1043 const char *ep;
1044 size_t section_len;
924aaf3e 1045 FILE *f = cf->f;
ae9ee41d 1046
10bea152
JS
1047 switch (store.state) {
1048 case KEY_SEEN:
f98d863d 1049 if (matches(key, value)) {
4ddba79d 1050 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1051 warning("%s has multiple values", key);
4ddba79d 1052 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 1053 error("too many matches for %s", key);
4ddba79d 1054 return 1;
10bea152 1055 }
4ddba79d 1056
924aaf3e 1057 store.offset[store.seen] = ftell(f);
10bea152
JS
1058 store.seen++;
1059 }
1060 break;
1061 case SECTION_SEEN:
ae9ee41d
JH
1062 /*
1063 * What we are looking for is in store.key (both
1064 * section and var), and its section part is baselen
1065 * long. We found key (again, both section and var).
1066 * We would want to know if this key is in the same
1067 * section as what we are looking for. We already
1068 * know we are in the same section as what should
1069 * hold store.key.
1070 */
1071 ep = strrchr(key, '.');
1072 section_len = ep - key;
1073
1074 if ((section_len != store.baselen) ||
1075 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1076 store.state = SECTION_END_SEEN;
1077 break;
ae9ee41d
JH
1078 }
1079
1080 /*
1081 * Do not increment matches: this is no match, but we
1082 * just made sure we are in the desired section.
1083 */
924aaf3e 1084 store.offset[store.seen] = ftell(f);
10bea152
JS
1085 /* fallthru */
1086 case SECTION_END_SEEN:
1087 case START:
f98d863d 1088 if (matches(key, value)) {
924aaf3e 1089 store.offset[store.seen] = ftell(f);
10bea152
JS
1090 store.state = KEY_SEEN;
1091 store.seen++;
d14f7764
LT
1092 } else {
1093 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1094 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1095 store.state = SECTION_SEEN;
924aaf3e 1096 store.offset[store.seen] = ftell(f);
d14f7764 1097 }
bdf0ef08 1098 }
10bea152
JS
1099 }
1100 return 0;
1101}
1102
64c0d71c 1103static int write_error(const char *filename)
480c9e52 1104{
64c0d71c 1105 error("failed to write new configuration file %s", filename);
480c9e52
AW
1106
1107 /* Same error code as "failed to rename". */
1108 return 4;
1109}
1110
4b25d091 1111static int store_write_section(int fd, const char *key)
10bea152 1112{
cb891a59
KH
1113 const char *dot;
1114 int i, success;
f285a2d7 1115 struct strbuf sb = STRBUF_INIT;
d14f7764 1116
cb891a59 1117 dot = memchr(key, '.', store.baselen);
d14f7764 1118 if (dot) {
cb891a59
KH
1119 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1120 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1121 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1122 strbuf_addch(&sb, '\\');
1123 strbuf_addch(&sb, key[i]);
d14f7764 1124 }
cb891a59
KH
1125 strbuf_addstr(&sb, "\"]\n");
1126 } else {
1127 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1128 }
1129
cb891a59
KH
1130 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1131 strbuf_release(&sb);
480c9e52 1132
cb891a59 1133 return success;
10bea152
JS
1134}
1135
4b25d091 1136static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1137{
cb891a59
KH
1138 int i, success;
1139 int length = strlen(key + store.baselen + 1);
1140 const char *quote = "";
f285a2d7 1141 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1142
6281f394
JM
1143 /*
1144 * Check to see if the value needs to be surrounded with a dq pair.
1145 * Note that problematic characters are always backslash-quoted; this
1146 * check is about not losing leading or trailing SP and strings that
1147 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1148 * configuration parser.
1149 */
cdd4fb15 1150 if (value[0] == ' ')
cb891a59 1151 quote = "\"";
cdd4fb15
BG
1152 for (i = 0; value[i]; i++)
1153 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1154 quote = "\"";
1155 if (i && value[i - 1] == ' ')
1156 quote = "\"";
1157
cb891a59
KH
1158 strbuf_addf(&sb, "\t%.*s = %s",
1159 length, key + store.baselen + 1, quote);
10bea152 1160
10bea152
JS
1161 for (i = 0; value[i]; i++)
1162 switch (value[i]) {
480c9e52 1163 case '\n':
cb891a59 1164 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1165 break;
1166 case '\t':
cb891a59 1167 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1168 break;
1169 case '"':
1170 case '\\':
cb891a59 1171 strbuf_addch(&sb, '\\');
480c9e52 1172 default:
cb891a59 1173 strbuf_addch(&sb, value[i]);
480c9e52
AW
1174 break;
1175 }
cb891a59
KH
1176 strbuf_addf(&sb, "%s\n", quote);
1177
1178 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1179 strbuf_release(&sb);
1180
1181 return success;
10bea152
JS
1182}
1183
4b25d091
FC
1184static ssize_t find_beginning_of_line(const char *contents, size_t size,
1185 size_t offset_, int *found_bracket)
4ddba79d 1186{
dc49cd76
SP
1187 size_t equal_offset = size, bracket_offset = size;
1188 ssize_t offset;
4ddba79d 1189
7a31cc0f 1190contline:
a6080a0a 1191 for (offset = offset_-2; offset > 0
4ddba79d
JS
1192 && contents[offset] != '\n'; offset--)
1193 switch (contents[offset]) {
1194 case '=': equal_offset = offset; break;
1195 case ']': bracket_offset = offset; break;
1196 }
7a31cc0f
FL
1197 if (offset > 0 && contents[offset-1] == '\\') {
1198 offset_ = offset;
1199 goto contline;
1200 }
4ddba79d
JS
1201 if (bracket_offset < equal_offset) {
1202 *found_bracket = 1;
1203 offset = bracket_offset+1;
1204 } else
1205 offset++;
1206
1207 return offset;
1208}
1209
5ec31182
RR
1210int git_config_set_in_file(const char *config_filename,
1211 const char *key, const char *value)
1212{
1213 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1214}
1215
4b25d091 1216int git_config_set(const char *key, const char *value)
10bea152 1217{
4ddba79d 1218 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1219}
1220
b09c53a3
LP
1221/*
1222 * Auxiliary function to sanity-check and split the key into the section
1223 * identifier and variable name.
1224 *
1225 * Returns 0 on success, -1 when there is an invalid character in the key and
1226 * -2 if there is no section name in the key.
1227 *
1228 * store_key - pointer to char* which will hold a copy of the key with
1229 * lowercase section and variable name
1230 * baselen - pointer to int which will hold the length of the
1231 * section + subsection part, can be NULL
1232 */
1233int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1234{
1235 int i, dot, baselen;
1236 const char *last_dot = strrchr(key, '.');
1237
1238 /*
1239 * Since "key" actually contains the section name and the real
1240 * key name separated by a dot, we have to know where the dot is.
1241 */
1242
2169ddc0 1243 if (last_dot == NULL || last_dot == key) {
b09c53a3 1244 error("key does not contain a section: %s", key);
7a397419 1245 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1246 }
1247
2169ddc0
LP
1248 if (!last_dot[1]) {
1249 error("key does not contain variable name: %s", key);
7a397419 1250 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1251 }
1252
b09c53a3
LP
1253 baselen = last_dot - key;
1254 if (baselen_)
1255 *baselen_ = baselen;
1256
1257 /*
1258 * Validate the key and while at it, lower case it for matching.
1259 */
1260 *store_key = xmalloc(strlen(key) + 1);
1261
1262 dot = 0;
1263 for (i = 0; key[i]; i++) {
1264 unsigned char c = key[i];
1265 if (c == '.')
1266 dot = 1;
1267 /* Leave the extended basename untouched.. */
1268 if (!dot || i > baselen) {
1269 if (!iskeychar(c) ||
1270 (i == baselen + 1 && !isalpha(c))) {
1271 error("invalid key: %s", key);
1272 goto out_free_ret_1;
1273 }
1274 c = tolower(c);
1275 } else if (c == '\n') {
1276 error("invalid key (newline): %s", key);
1277 goto out_free_ret_1;
1278 }
1279 (*store_key)[i] = c;
1280 }
1281 (*store_key)[i] = 0;
1282
1283 return 0;
1284
1285out_free_ret_1:
1286 free(*store_key);
7a397419 1287 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1288}
1289
10bea152
JS
1290/*
1291 * If value==NULL, unset in (remove from) config,
1292 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1293 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1294 * else all matching key/values (regardless how many) are removed,
1295 * before the new pair is written.
10bea152
JS
1296 *
1297 * Returns 0 on success.
1298 *
1299 * This function does this:
1300 *
1301 * - it locks the config file by creating ".git/config.lock"
1302 *
1303 * - it then parses the config using store_aux() as validator to find
1304 * the position on the key/value pair to replace. If it is to be unset,
1305 * it must be found exactly once.
1306 *
1307 * - the config file is mmap()ed and the part before the match (if any) is
1308 * written to the lock file, then the changed part and the rest.
1309 *
1310 * - the config file is removed and the lock file rename()d to it.
1311 *
1312 */
5ec31182
RR
1313int git_config_set_multivar_in_file(const char *config_filename,
1314 const char *key, const char *value,
1315 const char *value_regex, int multi_replace)
10bea152 1316{
f8ba655e 1317 int fd = -1, in_fd;
dafc88b1 1318 int ret;
6cbf973c 1319 struct lock_file *lock = NULL;
0a5f5759 1320 char *filename_buf = NULL;
4ddba79d 1321
b09c53a3
LP
1322 /* parse-key returns negative; flip the sign to feed exit(3) */
1323 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1324 if (ret)
dafc88b1 1325 goto out_free;
b17e659d
JS
1326
1327 store.multi_replace = multi_replace;
10bea152 1328
0a5f5759
JK
1329 if (!config_filename)
1330 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1331
1332 /*
6cbf973c 1333 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1334 * contents of .git/config will be written into it.
1335 */
6cbf973c
BS
1336 lock = xcalloc(sizeof(struct lock_file), 1);
1337 fd = hold_lock_file_for_update(lock, config_filename, 0);
1338 if (fd < 0) {
6ffd567b 1339 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1340 free(store.key);
7a397419 1341 ret = CONFIG_NO_LOCK;
dafc88b1 1342 goto out_free;
10bea152
JS
1343 }
1344
1345 /*
1346 * If .git/config does not exist yet, write a minimal version.
1347 */
88fb958b
AR
1348 in_fd = open(config_filename, O_RDONLY);
1349 if ( in_fd < 0 ) {
10bea152
JS
1350 free(store.key);
1351
88fb958b
AR
1352 if ( ENOENT != errno ) {
1353 error("opening %s: %s", config_filename,
1354 strerror(errno));
7a397419 1355 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1356 goto out_free;
88fb958b 1357 }
10bea152
JS
1358 /* if nothing to unset, error out */
1359 if (value == NULL) {
7a397419 1360 ret = CONFIG_NOTHING_SET;
dafc88b1 1361 goto out_free;
10bea152
JS
1362 }
1363
4b25d091 1364 store.key = (char *)key;
480c9e52 1365 if (!store_write_section(fd, key) ||
93c1e079
JH
1366 !store_write_pair(fd, key, value))
1367 goto write_err_out;
1368 } else {
88fb958b 1369 struct stat st;
4b25d091 1370 char *contents;
dc49cd76
SP
1371 size_t contents_sz, copy_begin, copy_end;
1372 int i, new_line = 0;
10bea152
JS
1373
1374 if (value_regex == NULL)
1375 store.value_regex = NULL;
1376 else {
f98d863d
JS
1377 if (value_regex[0] == '!') {
1378 store.do_not_match = 1;
1379 value_regex++;
1380 } else
1381 store.do_not_match = 0;
1382
2d7320d0 1383 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1384 if (regcomp(store.value_regex, value_regex,
1385 REG_EXTENDED)) {
64c0d71c 1386 error("invalid pattern: %s", value_regex);
10bea152 1387 free(store.value_regex);
7a397419 1388 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1389 goto out_free;
10bea152
JS
1390 }
1391 }
1392
4ddba79d 1393 store.offset[0] = 0;
10bea152
JS
1394 store.state = START;
1395 store.seen = 0;
1396
1397 /*
1398 * After this, store.offset will contain the *end* offset
1399 * of the last match, or remain at 0 if no match was found.
1400 * As a side effect, we make sure to transform only a valid
1401 * existing config file.
1402 */
ef90d6d4 1403 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1404 error("invalid config file %s", config_filename);
10bea152
JS
1405 free(store.key);
1406 if (store.value_regex != NULL) {
1407 regfree(store.value_regex);
1408 free(store.value_regex);
1409 }
7a397419 1410 ret = CONFIG_INVALID_FILE;
dafc88b1 1411 goto out_free;
10bea152
JS
1412 }
1413
1414 free(store.key);
1415 if (store.value_regex != NULL) {
1416 regfree(store.value_regex);
1417 free(store.value_regex);
1418 }
1419
4ddba79d
JS
1420 /* if nothing to unset, or too many matches, error out */
1421 if ((store.seen == 0 && value == NULL) ||
1422 (store.seen > 1 && multi_replace == 0)) {
7a397419 1423 ret = CONFIG_NOTHING_SET;
dafc88b1 1424 goto out_free;
10bea152
JS
1425 }
1426
88fb958b 1427 fstat(in_fd, &st);
dc49cd76
SP
1428 contents_sz = xsize_t(st.st_size);
1429 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1430 MAP_PRIVATE, in_fd, 0);
1431 close(in_fd);
1432
4ddba79d
JS
1433 if (store.seen == 0)
1434 store.seen = 1;
1435
1436 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1437 if (store.offset[i] == 0) {
dc49cd76 1438 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1439 } else if (store.state != KEY_SEEN) {
1440 copy_end = store.offset[i];
10bea152 1441 } else
4ddba79d 1442 copy_end = find_beginning_of_line(
dc49cd76 1443 contents, contents_sz,
4ddba79d
JS
1444 store.offset[i]-2, &new_line);
1445
02e5ba4a
JK
1446 if (copy_end > 0 && contents[copy_end-1] != '\n')
1447 new_line = 1;
1448
4ddba79d
JS
1449 /* write the first part of the config */
1450 if (copy_end > copy_begin) {
93c1e079
JH
1451 if (write_in_full(fd, contents + copy_begin,
1452 copy_end - copy_begin) <
1453 copy_end - copy_begin)
1454 goto write_err_out;
1455 if (new_line &&
2b7ca830 1456 write_str_in_full(fd, "\n") != 1)
93c1e079 1457 goto write_err_out;
4ddba79d
JS
1458 }
1459 copy_begin = store.offset[i];
10bea152
JS
1460 }
1461
10bea152
JS
1462 /* write the pair (value == NULL means unset) */
1463 if (value != NULL) {
93c1e079
JH
1464 if (store.state == START) {
1465 if (!store_write_section(fd, key))
1466 goto write_err_out;
480c9e52 1467 }
93c1e079
JH
1468 if (!store_write_pair(fd, key, value))
1469 goto write_err_out;
10bea152
JS
1470 }
1471
1472 /* write the rest of the config */
dc49cd76 1473 if (copy_begin < contents_sz)
93c1e079 1474 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1475 contents_sz - copy_begin) <
1476 contents_sz - copy_begin)
93c1e079 1477 goto write_err_out;
10bea152 1478
dc49cd76 1479 munmap(contents, contents_sz);
10bea152
JS
1480 }
1481
4ed7cd3a 1482 if (commit_lock_file(lock) < 0) {
64c0d71c 1483 error("could not commit config file %s", config_filename);
7a397419 1484 ret = CONFIG_NO_WRITE;
dafc88b1 1485 goto out_free;
10bea152
JS
1486 }
1487
6cbf973c
BS
1488 /*
1489 * lock is committed, so don't try to roll it back below.
1490 * NOTE: Since lockfile.c keeps a linked list of all created
1491 * lock_file structures, it isn't safe to free(lock). It's
1492 * better to just leave it hanging around.
1493 */
1494 lock = NULL;
dafc88b1
SH
1495 ret = 0;
1496
1497out_free:
6cbf973c
BS
1498 if (lock)
1499 rollback_lock_file(lock);
0a5f5759 1500 free(filename_buf);
dafc88b1 1501 return ret;
93c1e079
JH
1502
1503write_err_out:
64c0d71c 1504 ret = write_error(lock->filename);
93c1e079
JH
1505 goto out_free;
1506
10bea152
JS
1507}
1508
5ec31182
RR
1509int git_config_set_multivar(const char *key, const char *value,
1510 const char *value_regex, int multi_replace)
1511{
4a7bb5ba 1512 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1513 multi_replace);
5ec31182
RR
1514}
1515
118f8b24
PB
1516static int section_name_match (const char *buf, const char *name)
1517{
1518 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1519 if (buf[i] != '[')
1520 return 0;
1521 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1522 if (!dot && isspace(buf[i])) {
1523 dot = 1;
1524 if (name[j++] != '.')
1525 break;
1526 for (i++; isspace(buf[i]); i++)
1527 ; /* do nothing */
1528 if (buf[i] != '"')
1529 break;
1530 continue;
1531 }
1532 if (buf[i] == '\\' && dot)
1533 i++;
1534 else if (buf[i] == '"' && dot) {
1535 for (i++; isspace(buf[i]); i++)
1536 ; /* do_nothing */
1537 break;
1538 }
1539 if (buf[i] != name[j++])
1540 break;
1541 }
a4c0d463
AV
1542 if (buf[i] == ']' && name[j] == 0) {
1543 /*
1544 * We match, now just find the right length offset by
1545 * gobbling up any whitespace after it, as well
1546 */
1547 i++;
1548 for (; buf[i] && isspace(buf[i]); i++)
1549 ; /* do nothing */
1550 return i;
1551 }
1552 return 0;
118f8b24
PB
1553}
1554
1555/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1556int git_config_rename_section_in_file(const char *config_filename,
1557 const char *old_name, const char *new_name)
0667fcfb 1558{
118f8b24 1559 int ret = 0, remove = 0;
42bd39b5 1560 char *filename_buf = NULL;
0667fcfb
JS
1561 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1562 int out_fd;
1563 char buf[1024];
924aaf3e 1564 FILE *config_file;
0667fcfb 1565
42bd39b5
JK
1566 if (!config_filename)
1567 config_filename = filename_buf = git_pathdup("config");
1568
0667fcfb 1569 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1570 if (out_fd < 0) {
64c0d71c 1571 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1572 goto out;
1573 }
0667fcfb 1574
fc1905bb 1575 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1576 /* no config file means nothing to rename, no error */
1577 goto unlock_and_out;
fc1905bb 1578 }
0667fcfb
JS
1579
1580 while (fgets(buf, sizeof(buf), config_file)) {
1581 int i;
480c9e52 1582 int length;
9a5abfc7 1583 char *output = buf;
0667fcfb
JS
1584 for (i = 0; buf[i] && isspace(buf[i]); i++)
1585 ; /* do nothing */
1586 if (buf[i] == '[') {
1587 /* it's a section */
a4c0d463
AV
1588 int offset = section_name_match(&buf[i], old_name);
1589 if (offset > 0) {
118f8b24
PB
1590 ret++;
1591 if (new_name == NULL) {
1592 remove = 1;
0667fcfb
JS
1593 continue;
1594 }
0667fcfb 1595 store.baselen = strlen(new_name);
480c9e52 1596 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1597 ret = write_error(lock->filename);
480c9e52
AW
1598 goto out;
1599 }
9a5abfc7
AV
1600 /*
1601 * We wrote out the new section, with
1602 * a newline, now skip the old
1603 * section's length
1604 */
1605 output += offset + i;
1606 if (strlen(output) > 0) {
1607 /*
1608 * More content means there's
1609 * a declaration to put on the
1610 * next line; indent with a
1611 * tab
1612 */
1613 output -= 1;
1614 output[0] = '\t';
1615 }
0667fcfb 1616 }
118f8b24 1617 remove = 0;
0667fcfb 1618 }
118f8b24
PB
1619 if (remove)
1620 continue;
9a5abfc7
AV
1621 length = strlen(output);
1622 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1623 ret = write_error(lock->filename);
480c9e52
AW
1624 goto out;
1625 }
0667fcfb 1626 }
fc1905bb 1627 fclose(config_file);
8b590075 1628unlock_and_out:
4ed7cd3a 1629 if (commit_lock_file(lock) < 0)
64c0d71c 1630 ret = error("could not commit config file %s", config_filename);
8b590075 1631out:
42bd39b5 1632 free(filename_buf);
0667fcfb
JS
1633 return ret;
1634}
40ea4ed9 1635
42bd39b5
JK
1636int git_config_rename_section(const char *old_name, const char *new_name)
1637{
4a7bb5ba 1638 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1639}
1640
40ea4ed9
JH
1641/*
1642 * Call this to report error for your variable that should not
1643 * get a boolean value (i.e. "[my] var" means "true").
1644 */
1645int config_error_nonbool(const char *var)
1646{
1647 return error("Missing value for '%s'", var);
1648}