config: set errno in numeric git_parse_* functions
[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 12
4d8dd149
HV
13struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
1bc88819
HV
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
4d8dd149 22 } u;
924aaf3e 23 const char *name;
b2dc0945 24 int die_on_error;
924aaf3e
RJ
25 int linenr;
26 int eof;
27 struct strbuf value;
0971e992 28 struct strbuf var;
924aaf3e 29
4d8dd149
HV
30 int (*fgetc)(struct config_source *c);
31 int (*ungetc)(int c, struct config_source *conf);
32 long (*ftell)(struct config_source *c);
33};
34
35static struct config_source *cf;
924aaf3e 36
960ccca6
DH
37static int zlib_compression_seen;
38
4d8dd149
HV
39static int config_file_fgetc(struct config_source *conf)
40{
41 return fgetc(conf->u.file);
42}
43
44static int config_file_ungetc(int c, struct config_source *conf)
45{
46 return ungetc(c, conf->u.file);
47}
48
49static long config_file_ftell(struct config_source *conf)
50{
51 return ftell(conf->u.file);
52}
53
1bc88819
HV
54
55static int config_buf_fgetc(struct config_source *conf)
56{
57 if (conf->u.buf.pos < conf->u.buf.len)
58 return conf->u.buf.buf[conf->u.buf.pos++];
59
60 return EOF;
61}
62
63static int config_buf_ungetc(int c, struct config_source *conf)
64{
65 if (conf->u.buf.pos > 0)
66 return conf->u.buf.buf[--conf->u.buf.pos];
67
68 return EOF;
69}
70
71static long config_buf_ftell(struct config_source *conf)
72{
73 return conf->u.buf.pos;
74}
75
9b25a0b5
JK
76#define MAX_INCLUDE_DEPTH 10
77static const char include_depth_advice[] =
78"exceeded maximum include depth (%d) while including\n"
79" %s\n"
80"from\n"
81" %s\n"
82"Do you have circular includes?";
83static int handle_path_include(const char *path, struct config_include_data *inc)
84{
85 int ret = 0;
86 struct strbuf buf = STRBUF_INIT;
4c0a89fc
JK
87 char *expanded = expand_user_path(path);
88
89 if (!expanded)
90 return error("Could not expand include path '%s'", path);
91 path = expanded;
9b25a0b5
JK
92
93 /*
94 * Use an absolute path as-is, but interpret relative paths
95 * based on the including config file.
96 */
97 if (!is_absolute_path(path)) {
98 char *slash;
99
100 if (!cf || !cf->name)
101 return error("relative config includes must come from files");
102
103 slash = find_last_dir_sep(cf->name);
104 if (slash)
105 strbuf_add(&buf, cf->name, slash - cf->name + 1);
106 strbuf_addstr(&buf, path);
107 path = buf.buf;
108 }
109
4698c8fe 110 if (!access_or_die(path, R_OK, 0)) {
9b25a0b5
JK
111 if (++inc->depth > MAX_INCLUDE_DEPTH)
112 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
113 cf && cf->name ? cf->name : "the command line");
114 ret = git_config_from_file(git_config_include, path, inc);
115 inc->depth--;
116 }
117 strbuf_release(&buf);
4c0a89fc 118 free(expanded);
9b25a0b5
JK
119 return ret;
120}
121
122int git_config_include(const char *var, const char *value, void *data)
123{
124 struct config_include_data *inc = data;
125 const char *type;
126 int ret;
127
128 /*
129 * Pass along all values, including "include" directives; this makes it
130 * possible to query information on the includes themselves.
131 */
132 ret = inc->fn(var, value, inc->data);
133 if (ret < 0)
134 return ret;
135
136 type = skip_prefix(var, "include.");
137 if (!type)
138 return ret;
139
140 if (!strcmp(type, "path"))
141 ret = handle_path_include(value, inc);
142 return ret;
143}
144
8b1fa778
AR
145static void lowercase(char *p)
146{
147 for (; *p; p++)
148 *p = tolower(*p);
149}
8b1fa778 150
2b64fc89
JK
151void git_config_push_parameter(const char *text)
152{
153 struct strbuf env = STRBUF_INIT;
154 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
155 if (old) {
156 strbuf_addstr(&env, old);
157 strbuf_addch(&env, ' ');
158 }
159 sq_quote_buf(&env, text);
160 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
161 strbuf_release(&env);
162}
163
2496844b
JK
164int git_config_parse_parameter(const char *text,
165 config_fn_t fn, void *data)
8b1fa778 166{
572e4f6a 167 struct strbuf **pair;
f77bccae 168 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
169 if (!pair[0])
170 return error("bogus config parameter: %s", text);
572e4f6a
AR
171 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
172 strbuf_setlen(pair[0], pair[0]->len - 1);
173 strbuf_trim(pair[0]);
174 if (!pair[0]->len) {
175 strbuf_list_free(pair);
06eb708f 176 return error("bogus config parameter: %s", text);
8b1fa778 177 }
06eb708f
JK
178 lowercase(pair[0]->buf);
179 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
180 strbuf_list_free(pair);
181 return -1;
572e4f6a
AR
182 }
183 strbuf_list_free(pair);
8b1fa778
AR
184 return 0;
185}
186
06eb708f
JK
187int git_config_from_parameters(config_fn_t fn, void *data)
188{
2b64fc89
JK
189 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
190 char *envw;
191 const char **argv = NULL;
192 int nr = 0, alloc = 0;
193 int i;
194
195 if (!env)
196 return 0;
197 /* sq_dequote will write over it */
198 envw = xstrdup(env);
199
200 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
201 free(envw);
202 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
203 }
204
205 for (i = 0; i < nr; i++) {
06eb708f 206 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
207 free(argv);
208 free(envw);
209 return -1;
210 }
211 }
212
213 free(argv);
214 free(envw);
06eb708f 215 return nr > 0;
2b64fc89
JK
216}
217
17712991
LT
218static int get_next_char(void)
219{
4d8dd149 220 int c = cf->fgetc(cf);
17712991 221
dbb9a812
HV
222 if (c == '\r') {
223 /* DOS like systems */
4d8dd149 224 c = cf->fgetc(cf);
dbb9a812 225 if (c != '\n') {
4d8dd149 226 cf->ungetc(c, cf);
dbb9a812 227 c = '\r';
17712991
LT
228 }
229 }
dbb9a812
HV
230 if (c == '\n')
231 cf->linenr++;
232 if (c == EOF) {
233 cf->eof = 1;
234 c = '\n';
235 }
17712991
LT
236 return c;
237}
238
239static char *parse_value(void)
240{
e96c19c5 241 int quote = 0, comment = 0, space = 0;
17712991 242
924aaf3e 243 strbuf_reset(&cf->value);
17712991
LT
244 for (;;) {
245 int c = get_next_char();
17712991 246 if (c == '\n') {
4b340593
MS
247 if (quote) {
248 cf->linenr--;
17712991 249 return NULL;
4b340593 250 }
924aaf3e 251 return cf->value.buf;
17712991
LT
252 }
253 if (comment)
254 continue;
255 if (isspace(c) && !quote) {
924aaf3e 256 if (cf->value.len)
ebdaae37 257 space++;
17712991
LT
258 continue;
259 }
7ebdba61
JS
260 if (!quote) {
261 if (c == ';' || c == '#') {
262 comment = 1;
263 continue;
264 }
265 }
ebdaae37 266 for (; space; space--)
924aaf3e 267 strbuf_addch(&cf->value, ' ');
17712991
LT
268 if (c == '\\') {
269 c = get_next_char();
270 switch (c) {
271 case '\n':
272 continue;
273 case 't':
274 c = '\t';
275 break;
276 case 'b':
277 c = '\b';
278 break;
279 case 'n':
280 c = '\n';
281 break;
5cbb401d
LT
282 /* Some characters escape as themselves */
283 case '\\': case '"':
284 break;
285 /* Reject unknown escape sequences */
286 default:
287 return NULL;
17712991 288 }
924aaf3e 289 strbuf_addch(&cf->value, c);
17712991
LT
290 continue;
291 }
292 if (c == '"') {
293 quote = 1-quote;
294 continue;
295 }
924aaf3e 296 strbuf_addch(&cf->value, c);
17712991
LT
297 }
298}
299
38c5afa8
LT
300static inline int iskeychar(int c)
301{
302 return isalnum(c) || c == '-';
303}
304
0971e992 305static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
306{
307 int c;
308 char *value;
309
310 /* Get the full name */
311 for (;;) {
312 c = get_next_char();
924aaf3e 313 if (cf->eof)
17712991 314 break;
38c5afa8 315 if (!iskeychar(c))
17712991 316 break;
0971e992 317 strbuf_addch(name, tolower(c));
17712991 318 }
0971e992 319
17712991
LT
320 while (c == ' ' || c == '\t')
321 c = get_next_char();
322
323 value = NULL;
324 if (c != '\n') {
325 if (c != '=')
326 return -1;
327 value = parse_value();
328 if (!value)
329 return -1;
330 }
0971e992 331 return fn(name->buf, value, data);
17712991
LT
332}
333
0971e992 334static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
335{
336 do {
337 if (c == '\n')
4b340593 338 goto error_incomplete_line;
d14f7764
LT
339 c = get_next_char();
340 } while (isspace(c));
341
342 /* We require the format to be '[base "extension"]' */
343 if (c != '"')
344 return -1;
0971e992 345 strbuf_addch(name, '.');
d14f7764
LT
346
347 for (;;) {
348 int c = get_next_char();
349 if (c == '\n')
4b340593 350 goto error_incomplete_line;
d14f7764
LT
351 if (c == '"')
352 break;
353 if (c == '\\') {
354 c = get_next_char();
355 if (c == '\n')
4b340593 356 goto error_incomplete_line;
d14f7764 357 }
0971e992 358 strbuf_addch(name, c);
d14f7764
LT
359 }
360
361 /* Final ']' */
362 if (get_next_char() != ']')
363 return -1;
0971e992 364 return 0;
4b340593
MS
365error_incomplete_line:
366 cf->linenr--;
367 return -1;
d14f7764
LT
368}
369
0971e992 370static int get_base_var(struct strbuf *name)
17712991 371{
17712991
LT
372 for (;;) {
373 int c = get_next_char();
924aaf3e 374 if (cf->eof)
17712991
LT
375 return -1;
376 if (c == ']')
0971e992 377 return 0;
d14f7764 378 if (isspace(c))
0971e992 379 return get_extended_base_var(name, c);
38c5afa8 380 if (!iskeychar(c) && c != '.')
17712991 381 return -1;
0971e992 382 strbuf_addch(name, tolower(c));
17712991
LT
383 }
384}
385
4d8dd149 386static int git_parse_source(config_fn_t fn, void *data)
17712991
LT
387{
388 int comment = 0;
389 int baselen = 0;
0971e992 390 struct strbuf *var = &cf->var;
17712991 391
de056402
PB
392 /* U+FEFF Byte Order Mark in UTF8 */
393 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
394 const unsigned char *bomptr = utf8_bom;
395
17712991
LT
396 for (;;) {
397 int c = get_next_char();
de056402
PB
398 if (bomptr && *bomptr) {
399 /* We are at the file beginning; skip UTF8-encoded BOM
400 * if present. Sane editors won't put this in on their
401 * own, but e.g. Windows Notepad will do it happily. */
402 if ((unsigned char) c == *bomptr) {
403 bomptr++;
404 continue;
405 } else {
406 /* Do not tolerate partial BOM. */
407 if (bomptr != utf8_bom)
408 break;
409 /* No BOM at file beginning. Cool. */
410 bomptr = NULL;
411 }
412 }
17712991 413 if (c == '\n') {
924aaf3e 414 if (cf->eof)
17712991
LT
415 return 0;
416 comment = 0;
417 continue;
418 }
419 if (comment || isspace(c))
420 continue;
421 if (c == '#' || c == ';') {
422 comment = 1;
423 continue;
424 }
425 if (c == '[') {
0971e992
BW
426 /* Reset prior to determining a new stem */
427 strbuf_reset(var);
428 if (get_base_var(var) < 0 || var->len < 1)
17712991 429 break;
0971e992
BW
430 strbuf_addch(var, '.');
431 baselen = var->len;
17712991
LT
432 continue;
433 }
434 if (!isalpha(c))
435 break;
0971e992
BW
436 /*
437 * Truncate the var name back to the section header
438 * stem prior to grabbing the suffix part of the name
439 * and the value.
440 */
441 strbuf_setlen(var, baselen);
442 strbuf_addch(var, tolower(c));
443 if (get_value(fn, data, var) < 0)
17712991
LT
444 break;
445 }
b2dc0945
HV
446 if (cf->die_on_error)
447 die("bad config file line %d in %s", cf->linenr, cf->name);
448 else
449 return error("bad config file line %d in %s", cf->linenr, cf->name);
17712991
LT
450}
451
ebaa1bd4 452static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
453{
454 if (!*end)
455 return 1;
c8deb5a1
SP
456 else if (!strcasecmp(end, "k")) {
457 *val *= 1024;
458 return 1;
459 }
460 else if (!strcasecmp(end, "m")) {
461 *val *= 1024 * 1024;
462 return 1;
463 }
464 else if (!strcasecmp(end, "g")) {
465 *val *= 1024 * 1024 * 1024;
466 return 1;
467 }
468 return 0;
0b87b6e0
BD
469}
470
7192777d 471static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
0b87b6e0
BD
472{
473 if (value && *value) {
474 char *end;
ebaa1bd4
NA
475 intmax_t val;
476 uintmax_t uval;
477 uintmax_t factor = 1;
478
479 errno = 0;
480 val = strtoimax(value, &end, 0);
481 if (errno == ERANGE)
482 return 0;
33fdd77e
JK
483 if (!parse_unit_factor(end, &factor)) {
484 errno = EINVAL;
c8deb5a1 485 return 0;
33fdd77e 486 }
ebaa1bd4
NA
487 uval = abs(val);
488 uval *= factor;
33fdd77e
JK
489 if (uval > max || abs(val) > uval) {
490 errno = ERANGE;
ebaa1bd4 491 return 0;
33fdd77e 492 }
ebaa1bd4
NA
493 val *= factor;
494 *ret = val;
0b87b6e0
BD
495 return 1;
496 }
33fdd77e 497 errno = EINVAL;
0b87b6e0
BD
498 return 0;
499}
500
7192777d 501int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
17712991
LT
502{
503 if (value && *value) {
504 char *end;
ebaa1bd4
NA
505 uintmax_t val;
506 uintmax_t oldval;
507
508 errno = 0;
509 val = strtoumax(value, &end, 0);
510 if (errno == ERANGE)
511 return 0;
512 oldval = val;
33fdd77e
JK
513 if (!parse_unit_factor(end, &val)) {
514 errno = EINVAL;
c8deb5a1 515 return 0;
33fdd77e
JK
516 }
517 if (val > max || oldval > val) {
518 errno = ERANGE;
ebaa1bd4 519 return 0;
33fdd77e 520 }
c8deb5a1 521 *ret = val;
0b87b6e0 522 return 1;
17712991 523 }
33fdd77e 524 errno = EINVAL;
0b87b6e0
BD
525 return 0;
526}
527
42d194e9 528static int git_parse_int(const char *value, int *ret)
7192777d
JK
529{
530 intmax_t tmp;
42d194e9 531 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
7192777d
JK
532 return 0;
533 *ret = tmp;
534 return 1;
535}
536
537int git_parse_ulong(const char *value, unsigned long *ret)
538{
539 uintmax_t tmp;
540 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
541 return 0;
542 *ret = tmp;
543 return 1;
544}
545
c1867cea
JK
546static void die_bad_config(const char *name)
547{
924aaf3e
RJ
548 if (cf && cf->name)
549 die("bad config value for '%s' in %s", name, cf->name);
c1867cea
JK
550 die("bad config value for '%s'", name);
551}
552
0b87b6e0
BD
553int git_config_int(const char *name, const char *value)
554{
42d194e9
JK
555 int ret;
556 if (!git_parse_int(value, &ret))
c1867cea 557 die_bad_config(name);
0b87b6e0
BD
558 return ret;
559}
560
561unsigned long git_config_ulong(const char *name, const char *value)
562{
563 unsigned long ret;
564 if (!git_parse_ulong(value, &ret))
c1867cea 565 die_bad_config(name);
0b87b6e0 566 return ret;
17712991
LT
567}
568
b2be2f6a 569static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
570{
571 if (!value)
572 return 1;
573 if (!*value)
574 return 0;
8420ccd8
JH
575 if (!strcasecmp(value, "true")
576 || !strcasecmp(value, "yes")
577 || !strcasecmp(value, "on"))
17712991 578 return 1;
8420ccd8
JH
579 if (!strcasecmp(value, "false")
580 || !strcasecmp(value, "no")
581 || !strcasecmp(value, "off"))
17712991 582 return 0;
8420ccd8
JH
583 return -1;
584}
585
b2be2f6a
JK
586int git_config_maybe_bool(const char *name, const char *value)
587{
42d194e9 588 int v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
589 if (0 <= v)
590 return v;
42d194e9 591 if (git_parse_int(value, &v))
db6195ef 592 return !!v;
b2be2f6a
JK
593 return -1;
594}
595
8420ccd8
JH
596int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
597{
b2be2f6a 598 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
599 if (0 <= v) {
600 *is_bool = 1;
601 return v;
602 }
a53f2ec6 603 *is_bool = 0;
c35b0b58 604 return git_config_int(name, value);
17712991
LT
605}
606
a53f2ec6
JH
607int git_config_bool(const char *name, const char *value)
608{
609 int discard;
c35b0b58 610 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
611}
612
ea5105a5
CC
613int git_config_string(const char **dest, const char *var, const char *value)
614{
615 if (!value)
616 return config_error_nonbool(var);
617 *dest = xstrdup(value);
618 return 0;
619}
620
395de250
MM
621int git_config_pathname(const char **dest, const char *var, const char *value)
622{
623 if (!value)
624 return config_error_nonbool(var);
625 *dest = expand_user_path(value);
626 if (!*dest)
627 die("Failed to expand user dir in: '%s'", value);
628 return 0;
629}
630
806e2ad7 631static int git_default_core_config(const char *var, const char *value)
17712991
LT
632{
633 /* This needs a better name */
634 if (!strcmp(var, "core.filemode")) {
635 trust_executable_bit = git_config_bool(var, value);
636 return 0;
637 }
1ce4790b
AR
638 if (!strcmp(var, "core.trustctime")) {
639 trust_ctime = git_config_bool(var, value);
640 return 0;
641 }
6f4dd60d
JH
642 if (!strcmp(var, "core.statinfo") ||
643 !strcmp(var, "core.checkstat")) {
644 /*
645 * NEEDSWORK: statinfo was a typo in v1.8.2 that has
646 * never been advertised. we will remove it at Git
647 * 2.0 boundary.
648 */
649 if (!strcmp(var, "core.statinfo")) {
650 static int warned;
651 if (!warned++) {
652 warning("'core.statinfo' will be removed in Git 2.0; "
653 "use 'core.checkstat' instead.");
654 }
655 }
c08e4d5b
RR
656 if (!strcasecmp(value, "default"))
657 check_stat = 1;
658 else if (!strcasecmp(value, "minimal"))
659 check_stat = 0;
660 }
17712991 661
9378c161
JH
662 if (!strcmp(var, "core.quotepath")) {
663 quote_path_fully = git_config_bool(var, value);
664 return 0;
665 }
666
78a8d641
JS
667 if (!strcmp(var, "core.symlinks")) {
668 has_symlinks = git_config_bool(var, value);
669 return 0;
670 }
671
0a9b88b7
LT
672 if (!strcmp(var, "core.ignorecase")) {
673 ignore_case = git_config_bool(var, value);
674 return 0;
675 }
676
64589a03
JH
677 if (!strcmp(var, "core.attributesfile"))
678 return git_config_pathname(&git_attributes_file, var, value);
679
7d1864ce
JH
680 if (!strcmp(var, "core.bare")) {
681 is_bare_repository_cfg = git_config_bool(var, value);
682 return 0;
683 }
684
5f73076c
JH
685 if (!strcmp(var, "core.ignorestat")) {
686 assume_unchanged = git_config_bool(var, value);
687 return 0;
688 }
689
e388c738
JH
690 if (!strcmp(var, "core.prefersymlinkrefs")) {
691 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
692 return 0;
693 }
694
6de08ae6
SP
695 if (!strcmp(var, "core.logallrefupdates")) {
696 log_all_ref_updates = git_config_bool(var, value);
697 return 0;
698 }
699
2f8acdb3
JH
700 if (!strcmp(var, "core.warnambiguousrefs")) {
701 warn_ambiguous_refs = git_config_bool(var, value);
702 return 0;
703 }
704
a71f09fe 705 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
706 int abbrev = git_config_int(var, value);
707 if (abbrev < minimum_abbrev || abbrev > 40)
708 return -1;
709 default_abbrev = abbrev;
710 return 0;
711 }
712
960ccca6 713 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
714 int level = git_config_int(var, value);
715 if (level == -1)
716 level = Z_DEFAULT_COMPRESSION;
717 else if (level < 0 || level > Z_BEST_COMPRESSION)
718 die("bad zlib compression level %d", level);
719 zlib_compression_level = level;
960ccca6
DH
720 zlib_compression_seen = 1;
721 return 0;
722 }
723
724 if (!strcmp(var, "core.compression")) {
725 int level = git_config_int(var, value);
726 if (level == -1)
727 level = Z_DEFAULT_COMPRESSION;
728 else if (level < 0 || level > Z_BEST_COMPRESSION)
729 die("bad zlib compression level %d", level);
730 core_compression_level = level;
731 core_compression_seen = 1;
732 if (!zlib_compression_seen)
733 zlib_compression_level = level;
12f6c308
JBH
734 return 0;
735 }
736
60bb8b14 737 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 738 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 739 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
740
741 /* This value must be multiple of (pagesize * 2) */
742 packed_git_window_size /= pgsz_x2;
743 if (packed_git_window_size < 1)
744 packed_git_window_size = 1;
745 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
746 return 0;
747 }
748
15366280 749 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 750 big_file_threshold = git_config_ulong(var, value);
15366280
JH
751 return 0;
752 }
753
77ccc5bb 754 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 755 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
756 return 0;
757 }
758
18bdec11 759 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 760 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
761 return 0;
762 }
763
6c510bee 764 if (!strcmp(var, "core.autocrlf")) {
d7f46334 765 if (value && !strcasecmp(value, "input")) {
ec70f52f 766 if (core_eol == EOL_CRLF)
942e7747 767 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 768 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
769 return 0;
770 }
6c510bee
LT
771 auto_crlf = git_config_bool(var, value);
772 return 0;
773 }
774
21e5ad50
SP
775 if (!strcmp(var, "core.safecrlf")) {
776 if (value && !strcasecmp(value, "warn")) {
777 safe_crlf = SAFE_CRLF_WARN;
778 return 0;
779 }
780 safe_crlf = git_config_bool(var, value);
781 return 0;
782 }
783
942e7747
EB
784 if (!strcmp(var, "core.eol")) {
785 if (value && !strcasecmp(value, "lf"))
ec70f52f 786 core_eol = EOL_LF;
942e7747 787 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 788 core_eol = EOL_CRLF;
942e7747 789 else if (value && !strcasecmp(value, "native"))
ec70f52f 790 core_eol = EOL_NATIVE;
942e7747 791 else
ec70f52f
JH
792 core_eol = EOL_UNSET;
793 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
794 return error("core.autocrlf=input conflicts with core.eol=crlf");
795 return 0;
796 }
797
a97a7468
JS
798 if (!strcmp(var, "core.notesref")) {
799 notes_ref_name = xstrdup(value);
800 return 0;
801 }
802
806e2ad7
LT
803 if (!strcmp(var, "core.pager"))
804 return git_config_string(&pager_program, var, value);
805
806 if (!strcmp(var, "core.editor"))
807 return git_config_string(&editor_program, var, value);
808
eff80a9f
JH
809 if (!strcmp(var, "core.commentchar")) {
810 const char *comment;
811 int ret = git_config_string(&comment, var, value);
812 if (!ret)
813 comment_line_char = comment[0];
814 return ret;
815 }
816
d3e7da89
AK
817 if (!strcmp(var, "core.askpass"))
818 return git_config_string(&askpass_program, var, value);
819
806e2ad7 820 if (!strcmp(var, "core.excludesfile"))
395de250 821 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
822
823 if (!strcmp(var, "core.whitespace")) {
824 if (!value)
825 return config_error_nonbool(var);
826 whitespace_rule_cfg = parse_whitespace_rule(value);
827 return 0;
828 }
829
aafe9fba
LT
830 if (!strcmp(var, "core.fsyncobjectfiles")) {
831 fsync_object_files = git_config_bool(var, value);
832 return 0;
833 }
834
671c9b7e
LT
835 if (!strcmp(var, "core.preloadindex")) {
836 core_preload_index = git_config_bool(var, value);
837 return 0;
838 }
839
348df166
JS
840 if (!strcmp(var, "core.createobject")) {
841 if (!strcmp(value, "rename"))
842 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
843 else if (!strcmp(value, "link"))
844 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
845 else
846 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
847 return 0;
848 }
849
08aefc9e
NTND
850 if (!strcmp(var, "core.sparsecheckout")) {
851 core_apply_sparse_checkout = git_config_bool(var, value);
852 return 0;
853 }
854
76759c7d
TB
855 if (!strcmp(var, "core.precomposeunicode")) {
856 precomposed_unicode = git_config_bool(var, value);
857 return 0;
858 }
859
806e2ad7
LT
860 /* Add other config variables here and to Documentation/config.txt. */
861 return 0;
862}
863
1141f492 864static int git_default_i18n_config(const char *var, const char *value)
d1364529 865{
ea5105a5
CC
866 if (!strcmp(var, "i18n.commitencoding"))
867 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 868
ea5105a5
CC
869 if (!strcmp(var, "i18n.logoutputencoding"))
870 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 871
1141f492
LT
872 /* Add other config variables here and to Documentation/config.txt. */
873 return 0;
874}
039bc64e 875
1141f492
LT
876static int git_default_branch_config(const char *var, const char *value)
877{
9ed36cfa
JS
878 if (!strcmp(var, "branch.autosetupmerge")) {
879 if (value && !strcasecmp(value, "always")) {
880 git_branch_track = BRANCH_TRACK_ALWAYS;
881 return 0;
882 }
883 git_branch_track = git_config_bool(var, value);
884 return 0;
885 }
c998ae9b
DS
886 if (!strcmp(var, "branch.autosetuprebase")) {
887 if (!value)
888 return config_error_nonbool(var);
889 else if (!strcmp(value, "never"))
890 autorebase = AUTOREBASE_NEVER;
891 else if (!strcmp(value, "local"))
892 autorebase = AUTOREBASE_LOCAL;
893 else if (!strcmp(value, "remote"))
894 autorebase = AUTOREBASE_REMOTE;
895 else if (!strcmp(value, "always"))
896 autorebase = AUTOREBASE_ALWAYS;
897 else
898 return error("Malformed value for %s", var);
899 return 0;
900 }
a9cc857a 901
1ab661dd 902 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
903 return 0;
904}
905
52153747
FAG
906static int git_default_push_config(const char *var, const char *value)
907{
908 if (!strcmp(var, "push.default")) {
909 if (!value)
910 return config_error_nonbool(var);
911 else if (!strcmp(value, "nothing"))
912 push_default = PUSH_DEFAULT_NOTHING;
913 else if (!strcmp(value, "matching"))
914 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
915 else if (!strcmp(value, "simple"))
916 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
917 else if (!strcmp(value, "upstream"))
918 push_default = PUSH_DEFAULT_UPSTREAM;
919 else if (!strcmp(value, "tracking")) /* deprecated */
920 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
921 else if (!strcmp(value, "current"))
922 push_default = PUSH_DEFAULT_CURRENT;
923 else {
924 error("Malformed value for %s: %s", var, value);
b55e6775
MM
925 return error("Must be one of nothing, matching, simple, "
926 "upstream or current.");
52153747
FAG
927 }
928 return 0;
929 }
930
931 /* Add other config variables here and to Documentation/config.txt. */
932 return 0;
933}
934
d551a488
MSO
935static int git_default_mailmap_config(const char *var, const char *value)
936{
937 if (!strcmp(var, "mailmap.file"))
938 return git_config_string(&git_mailmap_file, var, value);
08610900
JK
939 if (!strcmp(var, "mailmap.blob"))
940 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
941
942 /* Add other config variables here and to Documentation/config.txt. */
943 return 0;
944}
945
1141f492
LT
946int git_default_config(const char *var, const char *value, void *dummy)
947{
948 if (!prefixcmp(var, "core."))
949 return git_default_core_config(var, value);
950
951 if (!prefixcmp(var, "user."))
9597921b 952 return git_ident_config(var, value, dummy);
1141f492
LT
953
954 if (!prefixcmp(var, "i18n."))
955 return git_default_i18n_config(var, value);
956
957 if (!prefixcmp(var, "branch."))
958 return git_default_branch_config(var, value);
959
52153747
FAG
960 if (!prefixcmp(var, "push."))
961 return git_default_push_config(var, value);
962
d551a488
MSO
963 if (!prefixcmp(var, "mailmap."))
964 return git_default_mailmap_config(var, value);
965
75194438
JK
966 if (!prefixcmp(var, "advice."))
967 return git_default_advice_config(var, value);
968
1141f492
LT
969 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
970 pager_use_color = git_config_bool(var,value);
971 return 0;
972 }
973
568508e7
JH
974 if (!strcmp(var, "pack.packsizelimit")) {
975 pack_size_limit_cfg = git_config_ulong(var, value);
976 return 0;
977 }
1141f492
LT
978 /* Add other config variables here and to Documentation/config.txt. */
979 return 0;
980}
981
ca4b5de2 982/*
b2dc0945 983 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 984 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
985 * this function.
986 */
4d8dd149 987static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
988{
989 int ret;
990
991 /* push config-file parsing state stack */
992 top->prev = cf;
993 top->linenr = 1;
994 top->eof = 0;
995 strbuf_init(&top->value, 1024);
996 strbuf_init(&top->var, 1024);
997 cf = top;
998
4d8dd149 999 ret = git_parse_source(fn, data);
ca4b5de2
HV
1000
1001 /* pop config-file parsing state stack */
1002 strbuf_release(&top->value);
1003 strbuf_release(&top->var);
1004 cf = top->prev;
1005
1006 return ret;
1007}
1008
ef90d6d4 1009int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
1010{
1011 int ret;
4f629539 1012 FILE *f = fopen(filename, "r");
17712991
LT
1013
1014 ret = -1;
1015 if (f) {
4d8dd149 1016 struct config_source top;
924aaf3e 1017
4d8dd149 1018 top.u.file = f;
924aaf3e 1019 top.name = filename;
b2dc0945 1020 top.die_on_error = 1;
4d8dd149
HV
1021 top.fgetc = config_file_fgetc;
1022 top.ungetc = config_file_ungetc;
1023 top.ftell = config_file_ftell;
924aaf3e 1024
ca4b5de2 1025 ret = do_config_from(&top, fn, data);
924aaf3e 1026
17712991
LT
1027 fclose(f);
1028 }
1029 return ret;
1030}
10bea152 1031
1bc88819
HV
1032int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1033 size_t len, void *data)
1034{
1035 struct config_source top;
1036
1037 top.u.buf.buf = buf;
1038 top.u.buf.len = len;
1039 top.u.buf.pos = 0;
1040 top.name = name;
b2dc0945 1041 top.die_on_error = 0;
1bc88819
HV
1042 top.fgetc = config_buf_fgetc;
1043 top.ungetc = config_buf_ungetc;
1044 top.ftell = config_buf_ftell;
1045
1046 return do_config_from(&top, fn, data);
1047}
1048
1049static int git_config_from_blob_sha1(config_fn_t fn,
1050 const char *name,
1051 const unsigned char *sha1,
1052 void *data)
1053{
1054 enum object_type type;
1055 char *buf;
1056 unsigned long size;
1057 int ret;
1058
1059 buf = read_sha1_file(sha1, &type, &size);
1060 if (!buf)
1061 return error("unable to load config blob object '%s'", name);
1062 if (type != OBJ_BLOB) {
1063 free(buf);
1064 return error("reference '%s' does not point to a blob", name);
1065 }
1066
1067 ret = git_config_from_buf(fn, name, buf, size, data);
1068 free(buf);
1069
1070 return ret;
1071}
1072
1073static int git_config_from_blob_ref(config_fn_t fn,
1074 const char *name,
1075 void *data)
1076{
1077 unsigned char sha1[20];
1078
1079 if (get_sha1(name, sha1) < 0)
1080 return error("unable to resolve config blob '%s'", name);
1081 return git_config_from_blob_sha1(fn, name, sha1, data);
1082}
1083
506b17b1
JS
1084const char *git_etc_gitconfig(void)
1085{
7f0e39fa 1086 static const char *system_wide;
2de9de5e
SP
1087 if (!system_wide)
1088 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1089 return system_wide;
506b17b1
JS
1090}
1091
0ef37164 1092int git_env_bool(const char *k, int def)
ab88c363
JK
1093{
1094 const char *v = getenv(k);
1095 return v ? git_config_bool(k, v) : def;
1096}
1097
1098int git_config_system(void)
1099{
1100 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1101}
1102
dbdf5854 1103int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1104{
aa387407 1105 int ret = 0, found = 0;
21cf3227
HKNN
1106 char *xdg_config = NULL;
1107 char *user_config = NULL;
1108
1109 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 1110
4698c8fe 1111 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1112 ret += git_config_from_file(fn, git_etc_gitconfig(),
1113 data);
aa387407
FC
1114 found += 1;
1115 }
5f1a63e0 1116
4698c8fe 1117 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1118 ret += git_config_from_file(fn, xdg_config, data);
1119 found += 1;
1120 }
1121
4698c8fe 1122 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1123 ret += git_config_from_file(fn, user_config, data);
1124 found += 1;
5f1a63e0
JS
1125 }
1126
4698c8fe 1127 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1128 ret += git_config_from_file(fn, repo_config, data);
1129 found += 1;
1130 }
8b1fa778 1131
5a0c9eeb
JK
1132 switch (git_config_from_parameters(fn, data)) {
1133 case -1: /* error */
1c2c9bee 1134 die("unable to parse command-line config");
5a0c9eeb
JK
1135 break;
1136 case 0: /* found nothing */
1137 break;
1138 default: /* found at least one item */
1139 found++;
1140 break;
1141 }
8b1fa778 1142
21cf3227
HKNN
1143 free(xdg_config);
1144 free(user_config);
1f2baa78 1145 return ret == 0 ? found : ret;
4f629539
JH
1146}
1147
c9b5e2a5 1148int git_config_with_options(config_fn_t fn, void *data,
1bc88819
HV
1149 const char *filename,
1150 const char *blob_ref,
1151 int respect_includes)
dbdf5854
NTND
1152{
1153 char *repo_config = NULL;
1154 int ret;
9b25a0b5
JK
1155 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1156
1157 if (respect_includes) {
1158 inc.fn = fn;
1159 inc.data = data;
1160 fn = git_config_include;
1161 data = &inc;
1162 }
dbdf5854 1163
c9b5e2a5
JK
1164 /*
1165 * If we have a specific filename, use it. Otherwise, follow the
1166 * regular lookup sequence.
1167 */
1168 if (filename)
1169 return git_config_from_file(fn, filename, data);
1bc88819
HV
1170 else if (blob_ref)
1171 return git_config_from_blob_ref(fn, blob_ref, data);
c9b5e2a5 1172
dbdf5854
NTND
1173 repo_config = git_pathdup("config");
1174 ret = git_config_early(fn, data, repo_config);
1175 if (repo_config)
1176 free(repo_config);
1177 return ret;
1178}
1179
c9b5e2a5
JK
1180int git_config(config_fn_t fn, void *data)
1181{
1bc88819 1182 return git_config_with_options(fn, data, NULL, NULL, 1);
c9b5e2a5
JK
1183}
1184
10bea152
JS
1185/*
1186 * Find all the stuff for git_config_set() below.
1187 */
4ddba79d
JS
1188
1189#define MAX_MATCHES 512
1190
10bea152
JS
1191static struct {
1192 int baselen;
4b25d091 1193 char *key;
f98d863d 1194 int do_not_match;
4b25d091 1195 regex_t *value_regex;
4ddba79d 1196 int multi_replace;
dc49cd76 1197 size_t offset[MAX_MATCHES];
10bea152
JS
1198 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1199 int seen;
1200} store;
1201
4b25d091 1202static int matches(const char *key, const char *value)
f98d863d
JS
1203{
1204 return !strcmp(key, store.key) &&
1205 (store.value_regex == NULL ||
1206 (store.do_not_match ^
1207 !regexec(store.value_regex, value, 0, NULL, 0)));
1208}
1209
4b25d091 1210static int store_aux(const char *key, const char *value, void *cb)
10bea152 1211{
ae9ee41d
JH
1212 const char *ep;
1213 size_t section_len;
1214
10bea152
JS
1215 switch (store.state) {
1216 case KEY_SEEN:
f98d863d 1217 if (matches(key, value)) {
4ddba79d 1218 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1219 warning("%s has multiple values", key);
4ddba79d 1220 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 1221 error("too many matches for %s", key);
4ddba79d 1222 return 1;
10bea152 1223 }
4ddba79d 1224
4d8dd149 1225 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1226 store.seen++;
1227 }
1228 break;
1229 case SECTION_SEEN:
ae9ee41d
JH
1230 /*
1231 * What we are looking for is in store.key (both
1232 * section and var), and its section part is baselen
1233 * long. We found key (again, both section and var).
1234 * We would want to know if this key is in the same
1235 * section as what we are looking for. We already
1236 * know we are in the same section as what should
1237 * hold store.key.
1238 */
1239 ep = strrchr(key, '.');
1240 section_len = ep - key;
1241
1242 if ((section_len != store.baselen) ||
1243 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1244 store.state = SECTION_END_SEEN;
1245 break;
ae9ee41d
JH
1246 }
1247
1248 /*
1249 * Do not increment matches: this is no match, but we
1250 * just made sure we are in the desired section.
1251 */
4d8dd149 1252 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1253 /* fallthru */
1254 case SECTION_END_SEEN:
1255 case START:
f98d863d 1256 if (matches(key, value)) {
4d8dd149 1257 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1258 store.state = KEY_SEEN;
1259 store.seen++;
d14f7764
LT
1260 } else {
1261 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1262 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1263 store.state = SECTION_SEEN;
4d8dd149 1264 store.offset[store.seen] = cf->ftell(cf);
d14f7764 1265 }
bdf0ef08 1266 }
10bea152
JS
1267 }
1268 return 0;
1269}
1270
64c0d71c 1271static int write_error(const char *filename)
480c9e52 1272{
64c0d71c 1273 error("failed to write new configuration file %s", filename);
480c9e52
AW
1274
1275 /* Same error code as "failed to rename". */
1276 return 4;
1277}
1278
4b25d091 1279static int store_write_section(int fd, const char *key)
10bea152 1280{
cb891a59
KH
1281 const char *dot;
1282 int i, success;
f285a2d7 1283 struct strbuf sb = STRBUF_INIT;
d14f7764 1284
cb891a59 1285 dot = memchr(key, '.', store.baselen);
d14f7764 1286 if (dot) {
cb891a59
KH
1287 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1288 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1289 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1290 strbuf_addch(&sb, '\\');
1291 strbuf_addch(&sb, key[i]);
d14f7764 1292 }
cb891a59
KH
1293 strbuf_addstr(&sb, "\"]\n");
1294 } else {
1295 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1296 }
1297
cb891a59
KH
1298 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1299 strbuf_release(&sb);
480c9e52 1300
cb891a59 1301 return success;
10bea152
JS
1302}
1303
4b25d091 1304static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1305{
cb891a59
KH
1306 int i, success;
1307 int length = strlen(key + store.baselen + 1);
1308 const char *quote = "";
f285a2d7 1309 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1310
6281f394
JM
1311 /*
1312 * Check to see if the value needs to be surrounded with a dq pair.
1313 * Note that problematic characters are always backslash-quoted; this
1314 * check is about not losing leading or trailing SP and strings that
1315 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1316 * configuration parser.
1317 */
cdd4fb15 1318 if (value[0] == ' ')
cb891a59 1319 quote = "\"";
cdd4fb15
BG
1320 for (i = 0; value[i]; i++)
1321 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1322 quote = "\"";
1323 if (i && value[i - 1] == ' ')
1324 quote = "\"";
1325
cb891a59
KH
1326 strbuf_addf(&sb, "\t%.*s = %s",
1327 length, key + store.baselen + 1, quote);
10bea152 1328
10bea152
JS
1329 for (i = 0; value[i]; i++)
1330 switch (value[i]) {
480c9e52 1331 case '\n':
cb891a59 1332 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1333 break;
1334 case '\t':
cb891a59 1335 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1336 break;
1337 case '"':
1338 case '\\':
cb891a59 1339 strbuf_addch(&sb, '\\');
480c9e52 1340 default:
cb891a59 1341 strbuf_addch(&sb, value[i]);
480c9e52
AW
1342 break;
1343 }
cb891a59
KH
1344 strbuf_addf(&sb, "%s\n", quote);
1345
1346 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1347 strbuf_release(&sb);
1348
1349 return success;
10bea152
JS
1350}
1351
4b25d091
FC
1352static ssize_t find_beginning_of_line(const char *contents, size_t size,
1353 size_t offset_, int *found_bracket)
4ddba79d 1354{
dc49cd76
SP
1355 size_t equal_offset = size, bracket_offset = size;
1356 ssize_t offset;
4ddba79d 1357
7a31cc0f 1358contline:
a6080a0a 1359 for (offset = offset_-2; offset > 0
4ddba79d
JS
1360 && contents[offset] != '\n'; offset--)
1361 switch (contents[offset]) {
1362 case '=': equal_offset = offset; break;
1363 case ']': bracket_offset = offset; break;
1364 }
7a31cc0f
FL
1365 if (offset > 0 && contents[offset-1] == '\\') {
1366 offset_ = offset;
1367 goto contline;
1368 }
4ddba79d
JS
1369 if (bracket_offset < equal_offset) {
1370 *found_bracket = 1;
1371 offset = bracket_offset+1;
1372 } else
1373 offset++;
1374
1375 return offset;
1376}
1377
5ec31182
RR
1378int git_config_set_in_file(const char *config_filename,
1379 const char *key, const char *value)
1380{
1381 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1382}
1383
4b25d091 1384int git_config_set(const char *key, const char *value)
10bea152 1385{
4ddba79d 1386 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1387}
1388
b09c53a3
LP
1389/*
1390 * Auxiliary function to sanity-check and split the key into the section
1391 * identifier and variable name.
1392 *
1393 * Returns 0 on success, -1 when there is an invalid character in the key and
1394 * -2 if there is no section name in the key.
1395 *
1396 * store_key - pointer to char* which will hold a copy of the key with
1397 * lowercase section and variable name
1398 * baselen - pointer to int which will hold the length of the
1399 * section + subsection part, can be NULL
1400 */
1401int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1402{
1403 int i, dot, baselen;
1404 const char *last_dot = strrchr(key, '.');
1405
1406 /*
1407 * Since "key" actually contains the section name and the real
1408 * key name separated by a dot, we have to know where the dot is.
1409 */
1410
2169ddc0 1411 if (last_dot == NULL || last_dot == key) {
b09c53a3 1412 error("key does not contain a section: %s", key);
7a397419 1413 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1414 }
1415
2169ddc0
LP
1416 if (!last_dot[1]) {
1417 error("key does not contain variable name: %s", key);
7a397419 1418 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1419 }
1420
b09c53a3
LP
1421 baselen = last_dot - key;
1422 if (baselen_)
1423 *baselen_ = baselen;
1424
1425 /*
1426 * Validate the key and while at it, lower case it for matching.
1427 */
1428 *store_key = xmalloc(strlen(key) + 1);
1429
1430 dot = 0;
1431 for (i = 0; key[i]; i++) {
1432 unsigned char c = key[i];
1433 if (c == '.')
1434 dot = 1;
1435 /* Leave the extended basename untouched.. */
1436 if (!dot || i > baselen) {
1437 if (!iskeychar(c) ||
1438 (i == baselen + 1 && !isalpha(c))) {
1439 error("invalid key: %s", key);
1440 goto out_free_ret_1;
1441 }
1442 c = tolower(c);
1443 } else if (c == '\n') {
1444 error("invalid key (newline): %s", key);
1445 goto out_free_ret_1;
1446 }
1447 (*store_key)[i] = c;
1448 }
1449 (*store_key)[i] = 0;
1450
1451 return 0;
1452
1453out_free_ret_1:
1454 free(*store_key);
97ed50f9 1455 *store_key = NULL;
7a397419 1456 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1457}
1458
10bea152
JS
1459/*
1460 * If value==NULL, unset in (remove from) config,
1461 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1462 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1463 * else all matching key/values (regardless how many) are removed,
1464 * before the new pair is written.
10bea152
JS
1465 *
1466 * Returns 0 on success.
1467 *
1468 * This function does this:
1469 *
1470 * - it locks the config file by creating ".git/config.lock"
1471 *
1472 * - it then parses the config using store_aux() as validator to find
1473 * the position on the key/value pair to replace. If it is to be unset,
1474 * it must be found exactly once.
1475 *
1476 * - the config file is mmap()ed and the part before the match (if any) is
1477 * written to the lock file, then the changed part and the rest.
1478 *
1479 * - the config file is removed and the lock file rename()d to it.
1480 *
1481 */
5ec31182
RR
1482int git_config_set_multivar_in_file(const char *config_filename,
1483 const char *key, const char *value,
1484 const char *value_regex, int multi_replace)
10bea152 1485{
f8ba655e 1486 int fd = -1, in_fd;
dafc88b1 1487 int ret;
6cbf973c 1488 struct lock_file *lock = NULL;
0a5f5759 1489 char *filename_buf = NULL;
4ddba79d 1490
b09c53a3
LP
1491 /* parse-key returns negative; flip the sign to feed exit(3) */
1492 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1493 if (ret)
dafc88b1 1494 goto out_free;
b17e659d
JS
1495
1496 store.multi_replace = multi_replace;
10bea152 1497
0a5f5759
JK
1498 if (!config_filename)
1499 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1500
1501 /*
6cbf973c 1502 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1503 * contents of .git/config will be written into it.
1504 */
6cbf973c
BS
1505 lock = xcalloc(sizeof(struct lock_file), 1);
1506 fd = hold_lock_file_for_update(lock, config_filename, 0);
1507 if (fd < 0) {
6ffd567b 1508 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1509 free(store.key);
7a397419 1510 ret = CONFIG_NO_LOCK;
dafc88b1 1511 goto out_free;
10bea152
JS
1512 }
1513
1514 /*
1515 * If .git/config does not exist yet, write a minimal version.
1516 */
88fb958b
AR
1517 in_fd = open(config_filename, O_RDONLY);
1518 if ( in_fd < 0 ) {
10bea152
JS
1519 free(store.key);
1520
88fb958b
AR
1521 if ( ENOENT != errno ) {
1522 error("opening %s: %s", config_filename,
1523 strerror(errno));
7a397419 1524 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1525 goto out_free;
88fb958b 1526 }
10bea152
JS
1527 /* if nothing to unset, error out */
1528 if (value == NULL) {
7a397419 1529 ret = CONFIG_NOTHING_SET;
dafc88b1 1530 goto out_free;
10bea152
JS
1531 }
1532
4b25d091 1533 store.key = (char *)key;
480c9e52 1534 if (!store_write_section(fd, key) ||
93c1e079
JH
1535 !store_write_pair(fd, key, value))
1536 goto write_err_out;
1537 } else {
88fb958b 1538 struct stat st;
4b25d091 1539 char *contents;
dc49cd76
SP
1540 size_t contents_sz, copy_begin, copy_end;
1541 int i, new_line = 0;
10bea152
JS
1542
1543 if (value_regex == NULL)
1544 store.value_regex = NULL;
1545 else {
f98d863d
JS
1546 if (value_regex[0] == '!') {
1547 store.do_not_match = 1;
1548 value_regex++;
1549 } else
1550 store.do_not_match = 0;
1551
2d7320d0 1552 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1553 if (regcomp(store.value_regex, value_regex,
1554 REG_EXTENDED)) {
64c0d71c 1555 error("invalid pattern: %s", value_regex);
10bea152 1556 free(store.value_regex);
7a397419 1557 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1558 goto out_free;
10bea152
JS
1559 }
1560 }
1561
4ddba79d 1562 store.offset[0] = 0;
10bea152
JS
1563 store.state = START;
1564 store.seen = 0;
1565
1566 /*
1567 * After this, store.offset will contain the *end* offset
1568 * of the last match, or remain at 0 if no match was found.
1569 * As a side effect, we make sure to transform only a valid
1570 * existing config file.
1571 */
ef90d6d4 1572 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1573 error("invalid config file %s", config_filename);
10bea152
JS
1574 free(store.key);
1575 if (store.value_regex != NULL) {
1576 regfree(store.value_regex);
1577 free(store.value_regex);
1578 }
7a397419 1579 ret = CONFIG_INVALID_FILE;
dafc88b1 1580 goto out_free;
10bea152
JS
1581 }
1582
1583 free(store.key);
1584 if (store.value_regex != NULL) {
1585 regfree(store.value_regex);
1586 free(store.value_regex);
1587 }
1588
4ddba79d
JS
1589 /* if nothing to unset, or too many matches, error out */
1590 if ((store.seen == 0 && value == NULL) ||
1591 (store.seen > 1 && multi_replace == 0)) {
7a397419 1592 ret = CONFIG_NOTHING_SET;
dafc88b1 1593 goto out_free;
10bea152
JS
1594 }
1595
88fb958b 1596 fstat(in_fd, &st);
dc49cd76
SP
1597 contents_sz = xsize_t(st.st_size);
1598 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1599 MAP_PRIVATE, in_fd, 0);
1600 close(in_fd);
1601
4ddba79d
JS
1602 if (store.seen == 0)
1603 store.seen = 1;
1604
1605 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1606 if (store.offset[i] == 0) {
dc49cd76 1607 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1608 } else if (store.state != KEY_SEEN) {
1609 copy_end = store.offset[i];
10bea152 1610 } else
4ddba79d 1611 copy_end = find_beginning_of_line(
dc49cd76 1612 contents, contents_sz,
4ddba79d
JS
1613 store.offset[i]-2, &new_line);
1614
02e5ba4a
JK
1615 if (copy_end > 0 && contents[copy_end-1] != '\n')
1616 new_line = 1;
1617
4ddba79d
JS
1618 /* write the first part of the config */
1619 if (copy_end > copy_begin) {
93c1e079
JH
1620 if (write_in_full(fd, contents + copy_begin,
1621 copy_end - copy_begin) <
1622 copy_end - copy_begin)
1623 goto write_err_out;
1624 if (new_line &&
2b7ca830 1625 write_str_in_full(fd, "\n") != 1)
93c1e079 1626 goto write_err_out;
4ddba79d
JS
1627 }
1628 copy_begin = store.offset[i];
10bea152
JS
1629 }
1630
10bea152
JS
1631 /* write the pair (value == NULL means unset) */
1632 if (value != NULL) {
93c1e079
JH
1633 if (store.state == START) {
1634 if (!store_write_section(fd, key))
1635 goto write_err_out;
480c9e52 1636 }
93c1e079
JH
1637 if (!store_write_pair(fd, key, value))
1638 goto write_err_out;
10bea152
JS
1639 }
1640
1641 /* write the rest of the config */
dc49cd76 1642 if (copy_begin < contents_sz)
93c1e079 1643 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1644 contents_sz - copy_begin) <
1645 contents_sz - copy_begin)
93c1e079 1646 goto write_err_out;
10bea152 1647
dc49cd76 1648 munmap(contents, contents_sz);
10bea152
JS
1649 }
1650
4ed7cd3a 1651 if (commit_lock_file(lock) < 0) {
64c0d71c 1652 error("could not commit config file %s", config_filename);
7a397419 1653 ret = CONFIG_NO_WRITE;
dafc88b1 1654 goto out_free;
10bea152
JS
1655 }
1656
6cbf973c
BS
1657 /*
1658 * lock is committed, so don't try to roll it back below.
1659 * NOTE: Since lockfile.c keeps a linked list of all created
1660 * lock_file structures, it isn't safe to free(lock). It's
1661 * better to just leave it hanging around.
1662 */
1663 lock = NULL;
dafc88b1
SH
1664 ret = 0;
1665
1666out_free:
6cbf973c
BS
1667 if (lock)
1668 rollback_lock_file(lock);
0a5f5759 1669 free(filename_buf);
dafc88b1 1670 return ret;
93c1e079
JH
1671
1672write_err_out:
64c0d71c 1673 ret = write_error(lock->filename);
93c1e079
JH
1674 goto out_free;
1675
10bea152
JS
1676}
1677
5ec31182
RR
1678int git_config_set_multivar(const char *key, const char *value,
1679 const char *value_regex, int multi_replace)
1680{
4a7bb5ba 1681 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1682 multi_replace);
5ec31182
RR
1683}
1684
118f8b24
PB
1685static int section_name_match (const char *buf, const char *name)
1686{
1687 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1688 if (buf[i] != '[')
1689 return 0;
1690 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1691 if (!dot && isspace(buf[i])) {
1692 dot = 1;
1693 if (name[j++] != '.')
1694 break;
1695 for (i++; isspace(buf[i]); i++)
1696 ; /* do nothing */
1697 if (buf[i] != '"')
1698 break;
1699 continue;
1700 }
1701 if (buf[i] == '\\' && dot)
1702 i++;
1703 else if (buf[i] == '"' && dot) {
1704 for (i++; isspace(buf[i]); i++)
1705 ; /* do_nothing */
1706 break;
1707 }
1708 if (buf[i] != name[j++])
1709 break;
1710 }
a4c0d463
AV
1711 if (buf[i] == ']' && name[j] == 0) {
1712 /*
1713 * We match, now just find the right length offset by
1714 * gobbling up any whitespace after it, as well
1715 */
1716 i++;
1717 for (; buf[i] && isspace(buf[i]); i++)
1718 ; /* do nothing */
1719 return i;
1720 }
1721 return 0;
118f8b24
PB
1722}
1723
94a35b1a
JK
1724static int section_name_is_ok(const char *name)
1725{
1726 /* Empty section names are bogus. */
1727 if (!*name)
1728 return 0;
1729
1730 /*
1731 * Before a dot, we must be alphanumeric or dash. After the first dot,
1732 * anything goes, so we can stop checking.
1733 */
1734 for (; *name && *name != '.'; name++)
1735 if (*name != '-' && !isalnum(*name))
1736 return 0;
1737 return 1;
1738}
1739
118f8b24 1740/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1741int git_config_rename_section_in_file(const char *config_filename,
1742 const char *old_name, const char *new_name)
0667fcfb 1743{
118f8b24 1744 int ret = 0, remove = 0;
42bd39b5 1745 char *filename_buf = NULL;
94a35b1a 1746 struct lock_file *lock;
0667fcfb
JS
1747 int out_fd;
1748 char buf[1024];
924aaf3e 1749 FILE *config_file;
0667fcfb 1750
94a35b1a
JK
1751 if (new_name && !section_name_is_ok(new_name)) {
1752 ret = error("invalid section name: %s", new_name);
1753 goto out;
1754 }
1755
42bd39b5
JK
1756 if (!config_filename)
1757 config_filename = filename_buf = git_pathdup("config");
1758
94a35b1a 1759 lock = xcalloc(sizeof(struct lock_file), 1);
0667fcfb 1760 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1761 if (out_fd < 0) {
64c0d71c 1762 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1763 goto out;
1764 }
0667fcfb 1765
fc1905bb 1766 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1767 /* no config file means nothing to rename, no error */
1768 goto unlock_and_out;
fc1905bb 1769 }
0667fcfb
JS
1770
1771 while (fgets(buf, sizeof(buf), config_file)) {
1772 int i;
480c9e52 1773 int length;
9a5abfc7 1774 char *output = buf;
0667fcfb
JS
1775 for (i = 0; buf[i] && isspace(buf[i]); i++)
1776 ; /* do nothing */
1777 if (buf[i] == '[') {
1778 /* it's a section */
a4c0d463
AV
1779 int offset = section_name_match(&buf[i], old_name);
1780 if (offset > 0) {
118f8b24
PB
1781 ret++;
1782 if (new_name == NULL) {
1783 remove = 1;
0667fcfb
JS
1784 continue;
1785 }
0667fcfb 1786 store.baselen = strlen(new_name);
480c9e52 1787 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1788 ret = write_error(lock->filename);
480c9e52
AW
1789 goto out;
1790 }
9a5abfc7
AV
1791 /*
1792 * We wrote out the new section, with
1793 * a newline, now skip the old
1794 * section's length
1795 */
1796 output += offset + i;
1797 if (strlen(output) > 0) {
1798 /*
1799 * More content means there's
1800 * a declaration to put on the
1801 * next line; indent with a
1802 * tab
1803 */
1804 output -= 1;
1805 output[0] = '\t';
1806 }
0667fcfb 1807 }
118f8b24 1808 remove = 0;
0667fcfb 1809 }
118f8b24
PB
1810 if (remove)
1811 continue;
9a5abfc7
AV
1812 length = strlen(output);
1813 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1814 ret = write_error(lock->filename);
480c9e52
AW
1815 goto out;
1816 }
0667fcfb 1817 }
fc1905bb 1818 fclose(config_file);
8b590075 1819unlock_and_out:
4ed7cd3a 1820 if (commit_lock_file(lock) < 0)
64c0d71c 1821 ret = error("could not commit config file %s", config_filename);
8b590075 1822out:
42bd39b5 1823 free(filename_buf);
0667fcfb
JS
1824 return ret;
1825}
40ea4ed9 1826
42bd39b5
JK
1827int git_config_rename_section(const char *old_name, const char *new_name)
1828{
4a7bb5ba 1829 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1830}
1831
40ea4ed9
JH
1832/*
1833 * Call this to report error for your variable that should not
1834 * get a boolean value (i.e. "[my] var" means "true").
1835 */
a469a101 1836#undef config_error_nonbool
40ea4ed9
JH
1837int config_error_nonbool(const char *var)
1838{
1839 return error("Missing value for '%s'", var);
1840}
1b86bbb0
JK
1841
1842int parse_config_key(const char *var,
1843 const char *section,
1844 const char **subsection, int *subsection_len,
1845 const char **key)
1846{
1847 int section_len = strlen(section);
1848 const char *dot;
1849
1850 /* Does it start with "section." ? */
1851 if (prefixcmp(var, section) || var[section_len] != '.')
1852 return -1;
1853
1854 /*
1855 * Find the key; we don't know yet if we have a subsection, but we must
1856 * parse backwards from the end, since the subsection may have dots in
1857 * it, too.
1858 */
1859 dot = strrchr(var, '.');
1860 *key = dot + 1;
1861
1862 /* Did we have a subsection at all? */
1863 if (dot == var + section_len) {
1864 *subsection = NULL;
1865 *subsection_len = 0;
1866 }
1867 else {
1868 *subsection = var + section_len + 1;
1869 *subsection_len = dot - *subsection;
1870 }
1871
1872 return 0;
1873}