config: make numeric parsing errors more clear
[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
2f666581 546static void die_bad_number(const char *name, const char *value)
c1867cea 547{
2f666581
JK
548 const char *reason = errno == ERANGE ?
549 "out of range" :
550 "invalid unit";
551 if (!value)
552 value = "";
553
924aaf3e 554 if (cf && cf->name)
2f666581
JK
555 die("bad numeric config value '%s' for '%s' in %s: %s",
556 value, name, cf->name, reason);
557 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
c1867cea
JK
558}
559
0b87b6e0
BD
560int git_config_int(const char *name, const char *value)
561{
42d194e9
JK
562 int ret;
563 if (!git_parse_int(value, &ret))
2f666581 564 die_bad_number(name, value);
0b87b6e0
BD
565 return ret;
566}
567
568unsigned long git_config_ulong(const char *name, const char *value)
569{
570 unsigned long ret;
571 if (!git_parse_ulong(value, &ret))
2f666581 572 die_bad_number(name, value);
0b87b6e0 573 return ret;
17712991
LT
574}
575
b2be2f6a 576static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
577{
578 if (!value)
579 return 1;
580 if (!*value)
581 return 0;
8420ccd8
JH
582 if (!strcasecmp(value, "true")
583 || !strcasecmp(value, "yes")
584 || !strcasecmp(value, "on"))
17712991 585 return 1;
8420ccd8
JH
586 if (!strcasecmp(value, "false")
587 || !strcasecmp(value, "no")
588 || !strcasecmp(value, "off"))
17712991 589 return 0;
8420ccd8
JH
590 return -1;
591}
592
b2be2f6a
JK
593int git_config_maybe_bool(const char *name, const char *value)
594{
42d194e9 595 int v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
596 if (0 <= v)
597 return v;
42d194e9 598 if (git_parse_int(value, &v))
db6195ef 599 return !!v;
b2be2f6a
JK
600 return -1;
601}
602
8420ccd8
JH
603int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
604{
b2be2f6a 605 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
606 if (0 <= v) {
607 *is_bool = 1;
608 return v;
609 }
a53f2ec6 610 *is_bool = 0;
c35b0b58 611 return git_config_int(name, value);
17712991
LT
612}
613
a53f2ec6
JH
614int git_config_bool(const char *name, const char *value)
615{
616 int discard;
c35b0b58 617 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
618}
619
ea5105a5
CC
620int git_config_string(const char **dest, const char *var, const char *value)
621{
622 if (!value)
623 return config_error_nonbool(var);
624 *dest = xstrdup(value);
625 return 0;
626}
627
395de250
MM
628int git_config_pathname(const char **dest, const char *var, const char *value)
629{
630 if (!value)
631 return config_error_nonbool(var);
632 *dest = expand_user_path(value);
633 if (!*dest)
634 die("Failed to expand user dir in: '%s'", value);
635 return 0;
636}
637
806e2ad7 638static int git_default_core_config(const char *var, const char *value)
17712991
LT
639{
640 /* This needs a better name */
641 if (!strcmp(var, "core.filemode")) {
642 trust_executable_bit = git_config_bool(var, value);
643 return 0;
644 }
1ce4790b
AR
645 if (!strcmp(var, "core.trustctime")) {
646 trust_ctime = git_config_bool(var, value);
647 return 0;
648 }
6f4dd60d
JH
649 if (!strcmp(var, "core.statinfo") ||
650 !strcmp(var, "core.checkstat")) {
651 /*
652 * NEEDSWORK: statinfo was a typo in v1.8.2 that has
653 * never been advertised. we will remove it at Git
654 * 2.0 boundary.
655 */
656 if (!strcmp(var, "core.statinfo")) {
657 static int warned;
658 if (!warned++) {
659 warning("'core.statinfo' will be removed in Git 2.0; "
660 "use 'core.checkstat' instead.");
661 }
662 }
c08e4d5b
RR
663 if (!strcasecmp(value, "default"))
664 check_stat = 1;
665 else if (!strcasecmp(value, "minimal"))
666 check_stat = 0;
667 }
17712991 668
9378c161
JH
669 if (!strcmp(var, "core.quotepath")) {
670 quote_path_fully = git_config_bool(var, value);
671 return 0;
672 }
673
78a8d641
JS
674 if (!strcmp(var, "core.symlinks")) {
675 has_symlinks = git_config_bool(var, value);
676 return 0;
677 }
678
0a9b88b7
LT
679 if (!strcmp(var, "core.ignorecase")) {
680 ignore_case = git_config_bool(var, value);
681 return 0;
682 }
683
64589a03
JH
684 if (!strcmp(var, "core.attributesfile"))
685 return git_config_pathname(&git_attributes_file, var, value);
686
7d1864ce
JH
687 if (!strcmp(var, "core.bare")) {
688 is_bare_repository_cfg = git_config_bool(var, value);
689 return 0;
690 }
691
5f73076c
JH
692 if (!strcmp(var, "core.ignorestat")) {
693 assume_unchanged = git_config_bool(var, value);
694 return 0;
695 }
696
e388c738
JH
697 if (!strcmp(var, "core.prefersymlinkrefs")) {
698 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
699 return 0;
700 }
701
6de08ae6
SP
702 if (!strcmp(var, "core.logallrefupdates")) {
703 log_all_ref_updates = git_config_bool(var, value);
704 return 0;
705 }
706
2f8acdb3
JH
707 if (!strcmp(var, "core.warnambiguousrefs")) {
708 warn_ambiguous_refs = git_config_bool(var, value);
709 return 0;
710 }
711
a71f09fe 712 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
713 int abbrev = git_config_int(var, value);
714 if (abbrev < minimum_abbrev || abbrev > 40)
715 return -1;
716 default_abbrev = abbrev;
717 return 0;
718 }
719
960ccca6 720 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
721 int level = git_config_int(var, value);
722 if (level == -1)
723 level = Z_DEFAULT_COMPRESSION;
724 else if (level < 0 || level > Z_BEST_COMPRESSION)
725 die("bad zlib compression level %d", level);
726 zlib_compression_level = level;
960ccca6
DH
727 zlib_compression_seen = 1;
728 return 0;
729 }
730
731 if (!strcmp(var, "core.compression")) {
732 int level = git_config_int(var, value);
733 if (level == -1)
734 level = Z_DEFAULT_COMPRESSION;
735 else if (level < 0 || level > Z_BEST_COMPRESSION)
736 die("bad zlib compression level %d", level);
737 core_compression_level = level;
738 core_compression_seen = 1;
739 if (!zlib_compression_seen)
740 zlib_compression_level = level;
12f6c308
JBH
741 return 0;
742 }
743
60bb8b14 744 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 745 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 746 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
747
748 /* This value must be multiple of (pagesize * 2) */
749 packed_git_window_size /= pgsz_x2;
750 if (packed_git_window_size < 1)
751 packed_git_window_size = 1;
752 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
753 return 0;
754 }
755
15366280 756 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 757 big_file_threshold = git_config_ulong(var, value);
15366280
JH
758 return 0;
759 }
760
77ccc5bb 761 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 762 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
763 return 0;
764 }
765
18bdec11 766 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 767 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
768 return 0;
769 }
770
6c510bee 771 if (!strcmp(var, "core.autocrlf")) {
d7f46334 772 if (value && !strcasecmp(value, "input")) {
ec70f52f 773 if (core_eol == EOL_CRLF)
942e7747 774 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 775 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
776 return 0;
777 }
6c510bee
LT
778 auto_crlf = git_config_bool(var, value);
779 return 0;
780 }
781
21e5ad50
SP
782 if (!strcmp(var, "core.safecrlf")) {
783 if (value && !strcasecmp(value, "warn")) {
784 safe_crlf = SAFE_CRLF_WARN;
785 return 0;
786 }
787 safe_crlf = git_config_bool(var, value);
788 return 0;
789 }
790
942e7747
EB
791 if (!strcmp(var, "core.eol")) {
792 if (value && !strcasecmp(value, "lf"))
ec70f52f 793 core_eol = EOL_LF;
942e7747 794 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 795 core_eol = EOL_CRLF;
942e7747 796 else if (value && !strcasecmp(value, "native"))
ec70f52f 797 core_eol = EOL_NATIVE;
942e7747 798 else
ec70f52f
JH
799 core_eol = EOL_UNSET;
800 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
801 return error("core.autocrlf=input conflicts with core.eol=crlf");
802 return 0;
803 }
804
a97a7468
JS
805 if (!strcmp(var, "core.notesref")) {
806 notes_ref_name = xstrdup(value);
807 return 0;
808 }
809
806e2ad7
LT
810 if (!strcmp(var, "core.pager"))
811 return git_config_string(&pager_program, var, value);
812
813 if (!strcmp(var, "core.editor"))
814 return git_config_string(&editor_program, var, value);
815
eff80a9f
JH
816 if (!strcmp(var, "core.commentchar")) {
817 const char *comment;
818 int ret = git_config_string(&comment, var, value);
819 if (!ret)
820 comment_line_char = comment[0];
821 return ret;
822 }
823
d3e7da89
AK
824 if (!strcmp(var, "core.askpass"))
825 return git_config_string(&askpass_program, var, value);
826
806e2ad7 827 if (!strcmp(var, "core.excludesfile"))
395de250 828 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
829
830 if (!strcmp(var, "core.whitespace")) {
831 if (!value)
832 return config_error_nonbool(var);
833 whitespace_rule_cfg = parse_whitespace_rule(value);
834 return 0;
835 }
836
aafe9fba
LT
837 if (!strcmp(var, "core.fsyncobjectfiles")) {
838 fsync_object_files = git_config_bool(var, value);
839 return 0;
840 }
841
671c9b7e
LT
842 if (!strcmp(var, "core.preloadindex")) {
843 core_preload_index = git_config_bool(var, value);
844 return 0;
845 }
846
348df166
JS
847 if (!strcmp(var, "core.createobject")) {
848 if (!strcmp(value, "rename"))
849 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
850 else if (!strcmp(value, "link"))
851 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
852 else
853 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
854 return 0;
855 }
856
08aefc9e
NTND
857 if (!strcmp(var, "core.sparsecheckout")) {
858 core_apply_sparse_checkout = git_config_bool(var, value);
859 return 0;
860 }
861
76759c7d
TB
862 if (!strcmp(var, "core.precomposeunicode")) {
863 precomposed_unicode = git_config_bool(var, value);
864 return 0;
865 }
866
806e2ad7
LT
867 /* Add other config variables here and to Documentation/config.txt. */
868 return 0;
869}
870
1141f492 871static int git_default_i18n_config(const char *var, const char *value)
d1364529 872{
ea5105a5
CC
873 if (!strcmp(var, "i18n.commitencoding"))
874 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 875
ea5105a5
CC
876 if (!strcmp(var, "i18n.logoutputencoding"))
877 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 878
1141f492
LT
879 /* Add other config variables here and to Documentation/config.txt. */
880 return 0;
881}
039bc64e 882
1141f492
LT
883static int git_default_branch_config(const char *var, const char *value)
884{
9ed36cfa
JS
885 if (!strcmp(var, "branch.autosetupmerge")) {
886 if (value && !strcasecmp(value, "always")) {
887 git_branch_track = BRANCH_TRACK_ALWAYS;
888 return 0;
889 }
890 git_branch_track = git_config_bool(var, value);
891 return 0;
892 }
c998ae9b
DS
893 if (!strcmp(var, "branch.autosetuprebase")) {
894 if (!value)
895 return config_error_nonbool(var);
896 else if (!strcmp(value, "never"))
897 autorebase = AUTOREBASE_NEVER;
898 else if (!strcmp(value, "local"))
899 autorebase = AUTOREBASE_LOCAL;
900 else if (!strcmp(value, "remote"))
901 autorebase = AUTOREBASE_REMOTE;
902 else if (!strcmp(value, "always"))
903 autorebase = AUTOREBASE_ALWAYS;
904 else
905 return error("Malformed value for %s", var);
906 return 0;
907 }
a9cc857a 908
1ab661dd 909 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
910 return 0;
911}
912
52153747
FAG
913static int git_default_push_config(const char *var, const char *value)
914{
915 if (!strcmp(var, "push.default")) {
916 if (!value)
917 return config_error_nonbool(var);
918 else if (!strcmp(value, "nothing"))
919 push_default = PUSH_DEFAULT_NOTHING;
920 else if (!strcmp(value, "matching"))
921 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
922 else if (!strcmp(value, "simple"))
923 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
924 else if (!strcmp(value, "upstream"))
925 push_default = PUSH_DEFAULT_UPSTREAM;
926 else if (!strcmp(value, "tracking")) /* deprecated */
927 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
928 else if (!strcmp(value, "current"))
929 push_default = PUSH_DEFAULT_CURRENT;
930 else {
931 error("Malformed value for %s: %s", var, value);
b55e6775
MM
932 return error("Must be one of nothing, matching, simple, "
933 "upstream or current.");
52153747
FAG
934 }
935 return 0;
936 }
937
938 /* Add other config variables here and to Documentation/config.txt. */
939 return 0;
940}
941
d551a488
MSO
942static int git_default_mailmap_config(const char *var, const char *value)
943{
944 if (!strcmp(var, "mailmap.file"))
945 return git_config_string(&git_mailmap_file, var, value);
08610900
JK
946 if (!strcmp(var, "mailmap.blob"))
947 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
948
949 /* Add other config variables here and to Documentation/config.txt. */
950 return 0;
951}
952
1141f492
LT
953int git_default_config(const char *var, const char *value, void *dummy)
954{
955 if (!prefixcmp(var, "core."))
956 return git_default_core_config(var, value);
957
958 if (!prefixcmp(var, "user."))
9597921b 959 return git_ident_config(var, value, dummy);
1141f492
LT
960
961 if (!prefixcmp(var, "i18n."))
962 return git_default_i18n_config(var, value);
963
964 if (!prefixcmp(var, "branch."))
965 return git_default_branch_config(var, value);
966
52153747
FAG
967 if (!prefixcmp(var, "push."))
968 return git_default_push_config(var, value);
969
d551a488
MSO
970 if (!prefixcmp(var, "mailmap."))
971 return git_default_mailmap_config(var, value);
972
75194438
JK
973 if (!prefixcmp(var, "advice."))
974 return git_default_advice_config(var, value);
975
1141f492
LT
976 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
977 pager_use_color = git_config_bool(var,value);
978 return 0;
979 }
980
568508e7
JH
981 if (!strcmp(var, "pack.packsizelimit")) {
982 pack_size_limit_cfg = git_config_ulong(var, value);
983 return 0;
984 }
1141f492
LT
985 /* Add other config variables here and to Documentation/config.txt. */
986 return 0;
987}
988
ca4b5de2 989/*
b2dc0945 990 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 991 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
992 * this function.
993 */
4d8dd149 994static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
995{
996 int ret;
997
998 /* push config-file parsing state stack */
999 top->prev = cf;
1000 top->linenr = 1;
1001 top->eof = 0;
1002 strbuf_init(&top->value, 1024);
1003 strbuf_init(&top->var, 1024);
1004 cf = top;
1005
4d8dd149 1006 ret = git_parse_source(fn, data);
ca4b5de2
HV
1007
1008 /* pop config-file parsing state stack */
1009 strbuf_release(&top->value);
1010 strbuf_release(&top->var);
1011 cf = top->prev;
1012
1013 return ret;
1014}
1015
ef90d6d4 1016int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
1017{
1018 int ret;
4f629539 1019 FILE *f = fopen(filename, "r");
17712991
LT
1020
1021 ret = -1;
1022 if (f) {
4d8dd149 1023 struct config_source top;
924aaf3e 1024
4d8dd149 1025 top.u.file = f;
924aaf3e 1026 top.name = filename;
b2dc0945 1027 top.die_on_error = 1;
4d8dd149
HV
1028 top.fgetc = config_file_fgetc;
1029 top.ungetc = config_file_ungetc;
1030 top.ftell = config_file_ftell;
924aaf3e 1031
ca4b5de2 1032 ret = do_config_from(&top, fn, data);
924aaf3e 1033
17712991
LT
1034 fclose(f);
1035 }
1036 return ret;
1037}
10bea152 1038
1bc88819
HV
1039int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1040 size_t len, void *data)
1041{
1042 struct config_source top;
1043
1044 top.u.buf.buf = buf;
1045 top.u.buf.len = len;
1046 top.u.buf.pos = 0;
1047 top.name = name;
b2dc0945 1048 top.die_on_error = 0;
1bc88819
HV
1049 top.fgetc = config_buf_fgetc;
1050 top.ungetc = config_buf_ungetc;
1051 top.ftell = config_buf_ftell;
1052
1053 return do_config_from(&top, fn, data);
1054}
1055
1056static int git_config_from_blob_sha1(config_fn_t fn,
1057 const char *name,
1058 const unsigned char *sha1,
1059 void *data)
1060{
1061 enum object_type type;
1062 char *buf;
1063 unsigned long size;
1064 int ret;
1065
1066 buf = read_sha1_file(sha1, &type, &size);
1067 if (!buf)
1068 return error("unable to load config blob object '%s'", name);
1069 if (type != OBJ_BLOB) {
1070 free(buf);
1071 return error("reference '%s' does not point to a blob", name);
1072 }
1073
1074 ret = git_config_from_buf(fn, name, buf, size, data);
1075 free(buf);
1076
1077 return ret;
1078}
1079
1080static int git_config_from_blob_ref(config_fn_t fn,
1081 const char *name,
1082 void *data)
1083{
1084 unsigned char sha1[20];
1085
1086 if (get_sha1(name, sha1) < 0)
1087 return error("unable to resolve config blob '%s'", name);
1088 return git_config_from_blob_sha1(fn, name, sha1, data);
1089}
1090
506b17b1
JS
1091const char *git_etc_gitconfig(void)
1092{
7f0e39fa 1093 static const char *system_wide;
2de9de5e
SP
1094 if (!system_wide)
1095 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1096 return system_wide;
506b17b1
JS
1097}
1098
0ef37164 1099int git_env_bool(const char *k, int def)
ab88c363
JK
1100{
1101 const char *v = getenv(k);
1102 return v ? git_config_bool(k, v) : def;
1103}
1104
1105int git_config_system(void)
1106{
1107 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1108}
1109
dbdf5854 1110int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1111{
aa387407 1112 int ret = 0, found = 0;
21cf3227
HKNN
1113 char *xdg_config = NULL;
1114 char *user_config = NULL;
1115
1116 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 1117
4698c8fe 1118 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1119 ret += git_config_from_file(fn, git_etc_gitconfig(),
1120 data);
aa387407
FC
1121 found += 1;
1122 }
5f1a63e0 1123
4698c8fe 1124 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1125 ret += git_config_from_file(fn, xdg_config, data);
1126 found += 1;
1127 }
1128
4698c8fe 1129 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1130 ret += git_config_from_file(fn, user_config, data);
1131 found += 1;
5f1a63e0
JS
1132 }
1133
4698c8fe 1134 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1135 ret += git_config_from_file(fn, repo_config, data);
1136 found += 1;
1137 }
8b1fa778 1138
5a0c9eeb
JK
1139 switch (git_config_from_parameters(fn, data)) {
1140 case -1: /* error */
1c2c9bee 1141 die("unable to parse command-line config");
5a0c9eeb
JK
1142 break;
1143 case 0: /* found nothing */
1144 break;
1145 default: /* found at least one item */
1146 found++;
1147 break;
1148 }
8b1fa778 1149
21cf3227
HKNN
1150 free(xdg_config);
1151 free(user_config);
1f2baa78 1152 return ret == 0 ? found : ret;
4f629539
JH
1153}
1154
c9b5e2a5 1155int git_config_with_options(config_fn_t fn, void *data,
1bc88819
HV
1156 const char *filename,
1157 const char *blob_ref,
1158 int respect_includes)
dbdf5854
NTND
1159{
1160 char *repo_config = NULL;
1161 int ret;
9b25a0b5
JK
1162 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1163
1164 if (respect_includes) {
1165 inc.fn = fn;
1166 inc.data = data;
1167 fn = git_config_include;
1168 data = &inc;
1169 }
dbdf5854 1170
c9b5e2a5
JK
1171 /*
1172 * If we have a specific filename, use it. Otherwise, follow the
1173 * regular lookup sequence.
1174 */
1175 if (filename)
1176 return git_config_from_file(fn, filename, data);
1bc88819
HV
1177 else if (blob_ref)
1178 return git_config_from_blob_ref(fn, blob_ref, data);
c9b5e2a5 1179
dbdf5854
NTND
1180 repo_config = git_pathdup("config");
1181 ret = git_config_early(fn, data, repo_config);
1182 if (repo_config)
1183 free(repo_config);
1184 return ret;
1185}
1186
c9b5e2a5
JK
1187int git_config(config_fn_t fn, void *data)
1188{
1bc88819 1189 return git_config_with_options(fn, data, NULL, NULL, 1);
c9b5e2a5
JK
1190}
1191
10bea152
JS
1192/*
1193 * Find all the stuff for git_config_set() below.
1194 */
4ddba79d
JS
1195
1196#define MAX_MATCHES 512
1197
10bea152
JS
1198static struct {
1199 int baselen;
4b25d091 1200 char *key;
f98d863d 1201 int do_not_match;
4b25d091 1202 regex_t *value_regex;
4ddba79d 1203 int multi_replace;
dc49cd76 1204 size_t offset[MAX_MATCHES];
10bea152
JS
1205 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1206 int seen;
1207} store;
1208
4b25d091 1209static int matches(const char *key, const char *value)
f98d863d
JS
1210{
1211 return !strcmp(key, store.key) &&
1212 (store.value_regex == NULL ||
1213 (store.do_not_match ^
1214 !regexec(store.value_regex, value, 0, NULL, 0)));
1215}
1216
4b25d091 1217static int store_aux(const char *key, const char *value, void *cb)
10bea152 1218{
ae9ee41d
JH
1219 const char *ep;
1220 size_t section_len;
1221
10bea152
JS
1222 switch (store.state) {
1223 case KEY_SEEN:
f98d863d 1224 if (matches(key, value)) {
4ddba79d 1225 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1226 warning("%s has multiple values", key);
4ddba79d 1227 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 1228 error("too many matches for %s", key);
4ddba79d 1229 return 1;
10bea152 1230 }
4ddba79d 1231
4d8dd149 1232 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1233 store.seen++;
1234 }
1235 break;
1236 case SECTION_SEEN:
ae9ee41d
JH
1237 /*
1238 * What we are looking for is in store.key (both
1239 * section and var), and its section part is baselen
1240 * long. We found key (again, both section and var).
1241 * We would want to know if this key is in the same
1242 * section as what we are looking for. We already
1243 * know we are in the same section as what should
1244 * hold store.key.
1245 */
1246 ep = strrchr(key, '.');
1247 section_len = ep - key;
1248
1249 if ((section_len != store.baselen) ||
1250 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1251 store.state = SECTION_END_SEEN;
1252 break;
ae9ee41d
JH
1253 }
1254
1255 /*
1256 * Do not increment matches: this is no match, but we
1257 * just made sure we are in the desired section.
1258 */
4d8dd149 1259 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1260 /* fallthru */
1261 case SECTION_END_SEEN:
1262 case START:
f98d863d 1263 if (matches(key, value)) {
4d8dd149 1264 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1265 store.state = KEY_SEEN;
1266 store.seen++;
d14f7764
LT
1267 } else {
1268 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1269 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1270 store.state = SECTION_SEEN;
4d8dd149 1271 store.offset[store.seen] = cf->ftell(cf);
d14f7764 1272 }
bdf0ef08 1273 }
10bea152
JS
1274 }
1275 return 0;
1276}
1277
64c0d71c 1278static int write_error(const char *filename)
480c9e52 1279{
64c0d71c 1280 error("failed to write new configuration file %s", filename);
480c9e52
AW
1281
1282 /* Same error code as "failed to rename". */
1283 return 4;
1284}
1285
4b25d091 1286static int store_write_section(int fd, const char *key)
10bea152 1287{
cb891a59
KH
1288 const char *dot;
1289 int i, success;
f285a2d7 1290 struct strbuf sb = STRBUF_INIT;
d14f7764 1291
cb891a59 1292 dot = memchr(key, '.', store.baselen);
d14f7764 1293 if (dot) {
cb891a59
KH
1294 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1295 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1296 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1297 strbuf_addch(&sb, '\\');
1298 strbuf_addch(&sb, key[i]);
d14f7764 1299 }
cb891a59
KH
1300 strbuf_addstr(&sb, "\"]\n");
1301 } else {
1302 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1303 }
1304
cb891a59
KH
1305 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1306 strbuf_release(&sb);
480c9e52 1307
cb891a59 1308 return success;
10bea152
JS
1309}
1310
4b25d091 1311static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1312{
cb891a59
KH
1313 int i, success;
1314 int length = strlen(key + store.baselen + 1);
1315 const char *quote = "";
f285a2d7 1316 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1317
6281f394
JM
1318 /*
1319 * Check to see if the value needs to be surrounded with a dq pair.
1320 * Note that problematic characters are always backslash-quoted; this
1321 * check is about not losing leading or trailing SP and strings that
1322 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1323 * configuration parser.
1324 */
cdd4fb15 1325 if (value[0] == ' ')
cb891a59 1326 quote = "\"";
cdd4fb15
BG
1327 for (i = 0; value[i]; i++)
1328 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1329 quote = "\"";
1330 if (i && value[i - 1] == ' ')
1331 quote = "\"";
1332
cb891a59
KH
1333 strbuf_addf(&sb, "\t%.*s = %s",
1334 length, key + store.baselen + 1, quote);
10bea152 1335
10bea152
JS
1336 for (i = 0; value[i]; i++)
1337 switch (value[i]) {
480c9e52 1338 case '\n':
cb891a59 1339 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1340 break;
1341 case '\t':
cb891a59 1342 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1343 break;
1344 case '"':
1345 case '\\':
cb891a59 1346 strbuf_addch(&sb, '\\');
480c9e52 1347 default:
cb891a59 1348 strbuf_addch(&sb, value[i]);
480c9e52
AW
1349 break;
1350 }
cb891a59
KH
1351 strbuf_addf(&sb, "%s\n", quote);
1352
1353 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1354 strbuf_release(&sb);
1355
1356 return success;
10bea152
JS
1357}
1358
4b25d091
FC
1359static ssize_t find_beginning_of_line(const char *contents, size_t size,
1360 size_t offset_, int *found_bracket)
4ddba79d 1361{
dc49cd76
SP
1362 size_t equal_offset = size, bracket_offset = size;
1363 ssize_t offset;
4ddba79d 1364
7a31cc0f 1365contline:
a6080a0a 1366 for (offset = offset_-2; offset > 0
4ddba79d
JS
1367 && contents[offset] != '\n'; offset--)
1368 switch (contents[offset]) {
1369 case '=': equal_offset = offset; break;
1370 case ']': bracket_offset = offset; break;
1371 }
7a31cc0f
FL
1372 if (offset > 0 && contents[offset-1] == '\\') {
1373 offset_ = offset;
1374 goto contline;
1375 }
4ddba79d
JS
1376 if (bracket_offset < equal_offset) {
1377 *found_bracket = 1;
1378 offset = bracket_offset+1;
1379 } else
1380 offset++;
1381
1382 return offset;
1383}
1384
5ec31182
RR
1385int git_config_set_in_file(const char *config_filename,
1386 const char *key, const char *value)
1387{
1388 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1389}
1390
4b25d091 1391int git_config_set(const char *key, const char *value)
10bea152 1392{
4ddba79d 1393 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1394}
1395
b09c53a3
LP
1396/*
1397 * Auxiliary function to sanity-check and split the key into the section
1398 * identifier and variable name.
1399 *
1400 * Returns 0 on success, -1 when there is an invalid character in the key and
1401 * -2 if there is no section name in the key.
1402 *
1403 * store_key - pointer to char* which will hold a copy of the key with
1404 * lowercase section and variable name
1405 * baselen - pointer to int which will hold the length of the
1406 * section + subsection part, can be NULL
1407 */
1408int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1409{
1410 int i, dot, baselen;
1411 const char *last_dot = strrchr(key, '.');
1412
1413 /*
1414 * Since "key" actually contains the section name and the real
1415 * key name separated by a dot, we have to know where the dot is.
1416 */
1417
2169ddc0 1418 if (last_dot == NULL || last_dot == key) {
b09c53a3 1419 error("key does not contain a section: %s", key);
7a397419 1420 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1421 }
1422
2169ddc0
LP
1423 if (!last_dot[1]) {
1424 error("key does not contain variable name: %s", key);
7a397419 1425 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1426 }
1427
b09c53a3
LP
1428 baselen = last_dot - key;
1429 if (baselen_)
1430 *baselen_ = baselen;
1431
1432 /*
1433 * Validate the key and while at it, lower case it for matching.
1434 */
1435 *store_key = xmalloc(strlen(key) + 1);
1436
1437 dot = 0;
1438 for (i = 0; key[i]; i++) {
1439 unsigned char c = key[i];
1440 if (c == '.')
1441 dot = 1;
1442 /* Leave the extended basename untouched.. */
1443 if (!dot || i > baselen) {
1444 if (!iskeychar(c) ||
1445 (i == baselen + 1 && !isalpha(c))) {
1446 error("invalid key: %s", key);
1447 goto out_free_ret_1;
1448 }
1449 c = tolower(c);
1450 } else if (c == '\n') {
1451 error("invalid key (newline): %s", key);
1452 goto out_free_ret_1;
1453 }
1454 (*store_key)[i] = c;
1455 }
1456 (*store_key)[i] = 0;
1457
1458 return 0;
1459
1460out_free_ret_1:
1461 free(*store_key);
97ed50f9 1462 *store_key = NULL;
7a397419 1463 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1464}
1465
10bea152
JS
1466/*
1467 * If value==NULL, unset in (remove from) config,
1468 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1469 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1470 * else all matching key/values (regardless how many) are removed,
1471 * before the new pair is written.
10bea152
JS
1472 *
1473 * Returns 0 on success.
1474 *
1475 * This function does this:
1476 *
1477 * - it locks the config file by creating ".git/config.lock"
1478 *
1479 * - it then parses the config using store_aux() as validator to find
1480 * the position on the key/value pair to replace. If it is to be unset,
1481 * it must be found exactly once.
1482 *
1483 * - the config file is mmap()ed and the part before the match (if any) is
1484 * written to the lock file, then the changed part and the rest.
1485 *
1486 * - the config file is removed and the lock file rename()d to it.
1487 *
1488 */
5ec31182
RR
1489int git_config_set_multivar_in_file(const char *config_filename,
1490 const char *key, const char *value,
1491 const char *value_regex, int multi_replace)
10bea152 1492{
f8ba655e 1493 int fd = -1, in_fd;
dafc88b1 1494 int ret;
6cbf973c 1495 struct lock_file *lock = NULL;
0a5f5759 1496 char *filename_buf = NULL;
4ddba79d 1497
b09c53a3
LP
1498 /* parse-key returns negative; flip the sign to feed exit(3) */
1499 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1500 if (ret)
dafc88b1 1501 goto out_free;
b17e659d
JS
1502
1503 store.multi_replace = multi_replace;
10bea152 1504
0a5f5759
JK
1505 if (!config_filename)
1506 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1507
1508 /*
6cbf973c 1509 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1510 * contents of .git/config will be written into it.
1511 */
6cbf973c
BS
1512 lock = xcalloc(sizeof(struct lock_file), 1);
1513 fd = hold_lock_file_for_update(lock, config_filename, 0);
1514 if (fd < 0) {
6ffd567b 1515 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1516 free(store.key);
7a397419 1517 ret = CONFIG_NO_LOCK;
dafc88b1 1518 goto out_free;
10bea152
JS
1519 }
1520
1521 /*
1522 * If .git/config does not exist yet, write a minimal version.
1523 */
88fb958b
AR
1524 in_fd = open(config_filename, O_RDONLY);
1525 if ( in_fd < 0 ) {
10bea152
JS
1526 free(store.key);
1527
88fb958b
AR
1528 if ( ENOENT != errno ) {
1529 error("opening %s: %s", config_filename,
1530 strerror(errno));
7a397419 1531 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1532 goto out_free;
88fb958b 1533 }
10bea152
JS
1534 /* if nothing to unset, error out */
1535 if (value == NULL) {
7a397419 1536 ret = CONFIG_NOTHING_SET;
dafc88b1 1537 goto out_free;
10bea152
JS
1538 }
1539
4b25d091 1540 store.key = (char *)key;
480c9e52 1541 if (!store_write_section(fd, key) ||
93c1e079
JH
1542 !store_write_pair(fd, key, value))
1543 goto write_err_out;
1544 } else {
88fb958b 1545 struct stat st;
4b25d091 1546 char *contents;
dc49cd76
SP
1547 size_t contents_sz, copy_begin, copy_end;
1548 int i, new_line = 0;
10bea152
JS
1549
1550 if (value_regex == NULL)
1551 store.value_regex = NULL;
1552 else {
f98d863d
JS
1553 if (value_regex[0] == '!') {
1554 store.do_not_match = 1;
1555 value_regex++;
1556 } else
1557 store.do_not_match = 0;
1558
2d7320d0 1559 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1560 if (regcomp(store.value_regex, value_regex,
1561 REG_EXTENDED)) {
64c0d71c 1562 error("invalid pattern: %s", value_regex);
10bea152 1563 free(store.value_regex);
7a397419 1564 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1565 goto out_free;
10bea152
JS
1566 }
1567 }
1568
4ddba79d 1569 store.offset[0] = 0;
10bea152
JS
1570 store.state = START;
1571 store.seen = 0;
1572
1573 /*
1574 * After this, store.offset will contain the *end* offset
1575 * of the last match, or remain at 0 if no match was found.
1576 * As a side effect, we make sure to transform only a valid
1577 * existing config file.
1578 */
ef90d6d4 1579 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1580 error("invalid config file %s", config_filename);
10bea152
JS
1581 free(store.key);
1582 if (store.value_regex != NULL) {
1583 regfree(store.value_regex);
1584 free(store.value_regex);
1585 }
7a397419 1586 ret = CONFIG_INVALID_FILE;
dafc88b1 1587 goto out_free;
10bea152
JS
1588 }
1589
1590 free(store.key);
1591 if (store.value_regex != NULL) {
1592 regfree(store.value_regex);
1593 free(store.value_regex);
1594 }
1595
4ddba79d
JS
1596 /* if nothing to unset, or too many matches, error out */
1597 if ((store.seen == 0 && value == NULL) ||
1598 (store.seen > 1 && multi_replace == 0)) {
7a397419 1599 ret = CONFIG_NOTHING_SET;
dafc88b1 1600 goto out_free;
10bea152
JS
1601 }
1602
88fb958b 1603 fstat(in_fd, &st);
dc49cd76
SP
1604 contents_sz = xsize_t(st.st_size);
1605 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1606 MAP_PRIVATE, in_fd, 0);
1607 close(in_fd);
1608
4ddba79d
JS
1609 if (store.seen == 0)
1610 store.seen = 1;
1611
1612 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1613 if (store.offset[i] == 0) {
dc49cd76 1614 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1615 } else if (store.state != KEY_SEEN) {
1616 copy_end = store.offset[i];
10bea152 1617 } else
4ddba79d 1618 copy_end = find_beginning_of_line(
dc49cd76 1619 contents, contents_sz,
4ddba79d
JS
1620 store.offset[i]-2, &new_line);
1621
02e5ba4a
JK
1622 if (copy_end > 0 && contents[copy_end-1] != '\n')
1623 new_line = 1;
1624
4ddba79d
JS
1625 /* write the first part of the config */
1626 if (copy_end > copy_begin) {
93c1e079
JH
1627 if (write_in_full(fd, contents + copy_begin,
1628 copy_end - copy_begin) <
1629 copy_end - copy_begin)
1630 goto write_err_out;
1631 if (new_line &&
2b7ca830 1632 write_str_in_full(fd, "\n") != 1)
93c1e079 1633 goto write_err_out;
4ddba79d
JS
1634 }
1635 copy_begin = store.offset[i];
10bea152
JS
1636 }
1637
10bea152
JS
1638 /* write the pair (value == NULL means unset) */
1639 if (value != NULL) {
93c1e079
JH
1640 if (store.state == START) {
1641 if (!store_write_section(fd, key))
1642 goto write_err_out;
480c9e52 1643 }
93c1e079
JH
1644 if (!store_write_pair(fd, key, value))
1645 goto write_err_out;
10bea152
JS
1646 }
1647
1648 /* write the rest of the config */
dc49cd76 1649 if (copy_begin < contents_sz)
93c1e079 1650 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1651 contents_sz - copy_begin) <
1652 contents_sz - copy_begin)
93c1e079 1653 goto write_err_out;
10bea152 1654
dc49cd76 1655 munmap(contents, contents_sz);
10bea152
JS
1656 }
1657
4ed7cd3a 1658 if (commit_lock_file(lock) < 0) {
64c0d71c 1659 error("could not commit config file %s", config_filename);
7a397419 1660 ret = CONFIG_NO_WRITE;
dafc88b1 1661 goto out_free;
10bea152
JS
1662 }
1663
6cbf973c
BS
1664 /*
1665 * lock is committed, so don't try to roll it back below.
1666 * NOTE: Since lockfile.c keeps a linked list of all created
1667 * lock_file structures, it isn't safe to free(lock). It's
1668 * better to just leave it hanging around.
1669 */
1670 lock = NULL;
dafc88b1
SH
1671 ret = 0;
1672
1673out_free:
6cbf973c
BS
1674 if (lock)
1675 rollback_lock_file(lock);
0a5f5759 1676 free(filename_buf);
dafc88b1 1677 return ret;
93c1e079
JH
1678
1679write_err_out:
64c0d71c 1680 ret = write_error(lock->filename);
93c1e079
JH
1681 goto out_free;
1682
10bea152
JS
1683}
1684
5ec31182
RR
1685int git_config_set_multivar(const char *key, const char *value,
1686 const char *value_regex, int multi_replace)
1687{
4a7bb5ba 1688 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1689 multi_replace);
5ec31182
RR
1690}
1691
118f8b24
PB
1692static int section_name_match (const char *buf, const char *name)
1693{
1694 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1695 if (buf[i] != '[')
1696 return 0;
1697 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1698 if (!dot && isspace(buf[i])) {
1699 dot = 1;
1700 if (name[j++] != '.')
1701 break;
1702 for (i++; isspace(buf[i]); i++)
1703 ; /* do nothing */
1704 if (buf[i] != '"')
1705 break;
1706 continue;
1707 }
1708 if (buf[i] == '\\' && dot)
1709 i++;
1710 else if (buf[i] == '"' && dot) {
1711 for (i++; isspace(buf[i]); i++)
1712 ; /* do_nothing */
1713 break;
1714 }
1715 if (buf[i] != name[j++])
1716 break;
1717 }
a4c0d463
AV
1718 if (buf[i] == ']' && name[j] == 0) {
1719 /*
1720 * We match, now just find the right length offset by
1721 * gobbling up any whitespace after it, as well
1722 */
1723 i++;
1724 for (; buf[i] && isspace(buf[i]); i++)
1725 ; /* do nothing */
1726 return i;
1727 }
1728 return 0;
118f8b24
PB
1729}
1730
94a35b1a
JK
1731static int section_name_is_ok(const char *name)
1732{
1733 /* Empty section names are bogus. */
1734 if (!*name)
1735 return 0;
1736
1737 /*
1738 * Before a dot, we must be alphanumeric or dash. After the first dot,
1739 * anything goes, so we can stop checking.
1740 */
1741 for (; *name && *name != '.'; name++)
1742 if (*name != '-' && !isalnum(*name))
1743 return 0;
1744 return 1;
1745}
1746
118f8b24 1747/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1748int git_config_rename_section_in_file(const char *config_filename,
1749 const char *old_name, const char *new_name)
0667fcfb 1750{
118f8b24 1751 int ret = 0, remove = 0;
42bd39b5 1752 char *filename_buf = NULL;
94a35b1a 1753 struct lock_file *lock;
0667fcfb
JS
1754 int out_fd;
1755 char buf[1024];
924aaf3e 1756 FILE *config_file;
0667fcfb 1757
94a35b1a
JK
1758 if (new_name && !section_name_is_ok(new_name)) {
1759 ret = error("invalid section name: %s", new_name);
1760 goto out;
1761 }
1762
42bd39b5
JK
1763 if (!config_filename)
1764 config_filename = filename_buf = git_pathdup("config");
1765
94a35b1a 1766 lock = xcalloc(sizeof(struct lock_file), 1);
0667fcfb 1767 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1768 if (out_fd < 0) {
64c0d71c 1769 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1770 goto out;
1771 }
0667fcfb 1772
fc1905bb 1773 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1774 /* no config file means nothing to rename, no error */
1775 goto unlock_and_out;
fc1905bb 1776 }
0667fcfb
JS
1777
1778 while (fgets(buf, sizeof(buf), config_file)) {
1779 int i;
480c9e52 1780 int length;
9a5abfc7 1781 char *output = buf;
0667fcfb
JS
1782 for (i = 0; buf[i] && isspace(buf[i]); i++)
1783 ; /* do nothing */
1784 if (buf[i] == '[') {
1785 /* it's a section */
a4c0d463
AV
1786 int offset = section_name_match(&buf[i], old_name);
1787 if (offset > 0) {
118f8b24
PB
1788 ret++;
1789 if (new_name == NULL) {
1790 remove = 1;
0667fcfb
JS
1791 continue;
1792 }
0667fcfb 1793 store.baselen = strlen(new_name);
480c9e52 1794 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1795 ret = write_error(lock->filename);
480c9e52
AW
1796 goto out;
1797 }
9a5abfc7
AV
1798 /*
1799 * We wrote out the new section, with
1800 * a newline, now skip the old
1801 * section's length
1802 */
1803 output += offset + i;
1804 if (strlen(output) > 0) {
1805 /*
1806 * More content means there's
1807 * a declaration to put on the
1808 * next line; indent with a
1809 * tab
1810 */
1811 output -= 1;
1812 output[0] = '\t';
1813 }
0667fcfb 1814 }
118f8b24 1815 remove = 0;
0667fcfb 1816 }
118f8b24
PB
1817 if (remove)
1818 continue;
9a5abfc7
AV
1819 length = strlen(output);
1820 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1821 ret = write_error(lock->filename);
480c9e52
AW
1822 goto out;
1823 }
0667fcfb 1824 }
fc1905bb 1825 fclose(config_file);
8b590075 1826unlock_and_out:
4ed7cd3a 1827 if (commit_lock_file(lock) < 0)
64c0d71c 1828 ret = error("could not commit config file %s", config_filename);
8b590075 1829out:
42bd39b5 1830 free(filename_buf);
0667fcfb
JS
1831 return ret;
1832}
40ea4ed9 1833
42bd39b5
JK
1834int git_config_rename_section(const char *old_name, const char *new_name)
1835{
4a7bb5ba 1836 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1837}
1838
40ea4ed9
JH
1839/*
1840 * Call this to report error for your variable that should not
1841 * get a boolean value (i.e. "[my] var" means "true").
1842 */
a469a101 1843#undef config_error_nonbool
40ea4ed9
JH
1844int config_error_nonbool(const char *var)
1845{
1846 return error("Missing value for '%s'", var);
1847}
1b86bbb0
JK
1848
1849int parse_config_key(const char *var,
1850 const char *section,
1851 const char **subsection, int *subsection_len,
1852 const char **key)
1853{
1854 int section_len = strlen(section);
1855 const char *dot;
1856
1857 /* Does it start with "section." ? */
1858 if (prefixcmp(var, section) || var[section_len] != '.')
1859 return -1;
1860
1861 /*
1862 * Find the key; we don't know yet if we have a subsection, but we must
1863 * parse backwards from the end, since the subsection may have dots in
1864 * it, too.
1865 */
1866 dot = strrchr(var, '.');
1867 *key = dot + 1;
1868
1869 /* Did we have a subsection at all? */
1870 if (dot == var + section_len) {
1871 *subsection = NULL;
1872 *subsection_len = 0;
1873 }
1874 else {
1875 *subsection = var + section_len + 1;
1876 *subsection_len = dot - *subsection;
1877 }
1878
1879 return 0;
1880}