Git 1.8.4-rc4
[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
0433bcd9 471static int git_parse_long(const char *value, long *ret)
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;
c8deb5a1
SP
483 if (!parse_unit_factor(end, &factor))
484 return 0;
ebaa1bd4
NA
485 uval = abs(val);
486 uval *= factor;
487 if ((uval > maximum_signed_value_of_type(long)) ||
488 (abs(val) > uval))
489 return 0;
490 val *= factor;
491 *ret = val;
0b87b6e0
BD
492 return 1;
493 }
494 return 0;
495}
496
497int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
498{
499 if (value && *value) {
500 char *end;
ebaa1bd4
NA
501 uintmax_t val;
502 uintmax_t oldval;
503
504 errno = 0;
505 val = strtoumax(value, &end, 0);
506 if (errno == ERANGE)
507 return 0;
508 oldval = val;
c8deb5a1
SP
509 if (!parse_unit_factor(end, &val))
510 return 0;
ebaa1bd4
NA
511 if ((val > maximum_unsigned_value_of_type(long)) ||
512 (oldval > val))
513 return 0;
c8deb5a1 514 *ret = val;
0b87b6e0 515 return 1;
17712991 516 }
0b87b6e0
BD
517 return 0;
518}
519
c1867cea
JK
520static void die_bad_config(const char *name)
521{
924aaf3e
RJ
522 if (cf && cf->name)
523 die("bad config value for '%s' in %s", name, cf->name);
c1867cea
JK
524 die("bad config value for '%s'", name);
525}
526
0b87b6e0
BD
527int git_config_int(const char *name, const char *value)
528{
0433bcd9 529 long ret = 0;
0b87b6e0 530 if (!git_parse_long(value, &ret))
c1867cea 531 die_bad_config(name);
0b87b6e0
BD
532 return ret;
533}
534
535unsigned long git_config_ulong(const char *name, const char *value)
536{
537 unsigned long ret;
538 if (!git_parse_ulong(value, &ret))
c1867cea 539 die_bad_config(name);
0b87b6e0 540 return ret;
17712991
LT
541}
542
b2be2f6a 543static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
544{
545 if (!value)
546 return 1;
547 if (!*value)
548 return 0;
8420ccd8
JH
549 if (!strcasecmp(value, "true")
550 || !strcasecmp(value, "yes")
551 || !strcasecmp(value, "on"))
17712991 552 return 1;
8420ccd8
JH
553 if (!strcasecmp(value, "false")
554 || !strcasecmp(value, "no")
555 || !strcasecmp(value, "off"))
17712991 556 return 0;
8420ccd8
JH
557 return -1;
558}
559
b2be2f6a
JK
560int git_config_maybe_bool(const char *name, const char *value)
561{
db6195ef 562 long v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
563 if (0 <= v)
564 return v;
db6195ef
JK
565 if (git_parse_long(value, &v))
566 return !!v;
b2be2f6a
JK
567 return -1;
568}
569
8420ccd8
JH
570int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
571{
b2be2f6a 572 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
573 if (0 <= v) {
574 *is_bool = 1;
575 return v;
576 }
a53f2ec6 577 *is_bool = 0;
c35b0b58 578 return git_config_int(name, value);
17712991
LT
579}
580
a53f2ec6
JH
581int git_config_bool(const char *name, const char *value)
582{
583 int discard;
c35b0b58 584 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
585}
586
ea5105a5
CC
587int git_config_string(const char **dest, const char *var, const char *value)
588{
589 if (!value)
590 return config_error_nonbool(var);
591 *dest = xstrdup(value);
592 return 0;
593}
594
395de250
MM
595int git_config_pathname(const char **dest, const char *var, const char *value)
596{
597 if (!value)
598 return config_error_nonbool(var);
599 *dest = expand_user_path(value);
600 if (!*dest)
601 die("Failed to expand user dir in: '%s'", value);
602 return 0;
603}
604
806e2ad7 605static int git_default_core_config(const char *var, const char *value)
17712991
LT
606{
607 /* This needs a better name */
608 if (!strcmp(var, "core.filemode")) {
609 trust_executable_bit = git_config_bool(var, value);
610 return 0;
611 }
1ce4790b
AR
612 if (!strcmp(var, "core.trustctime")) {
613 trust_ctime = git_config_bool(var, value);
614 return 0;
615 }
6f4dd60d
JH
616 if (!strcmp(var, "core.statinfo") ||
617 !strcmp(var, "core.checkstat")) {
618 /*
619 * NEEDSWORK: statinfo was a typo in v1.8.2 that has
620 * never been advertised. we will remove it at Git
621 * 2.0 boundary.
622 */
623 if (!strcmp(var, "core.statinfo")) {
624 static int warned;
625 if (!warned++) {
626 warning("'core.statinfo' will be removed in Git 2.0; "
627 "use 'core.checkstat' instead.");
628 }
629 }
c08e4d5b
RR
630 if (!strcasecmp(value, "default"))
631 check_stat = 1;
632 else if (!strcasecmp(value, "minimal"))
633 check_stat = 0;
634 }
17712991 635
9378c161
JH
636 if (!strcmp(var, "core.quotepath")) {
637 quote_path_fully = git_config_bool(var, value);
638 return 0;
639 }
640
78a8d641
JS
641 if (!strcmp(var, "core.symlinks")) {
642 has_symlinks = git_config_bool(var, value);
643 return 0;
644 }
645
0a9b88b7
LT
646 if (!strcmp(var, "core.ignorecase")) {
647 ignore_case = git_config_bool(var, value);
648 return 0;
649 }
650
64589a03
JH
651 if (!strcmp(var, "core.attributesfile"))
652 return git_config_pathname(&git_attributes_file, var, value);
653
7d1864ce
JH
654 if (!strcmp(var, "core.bare")) {
655 is_bare_repository_cfg = git_config_bool(var, value);
656 return 0;
657 }
658
5f73076c
JH
659 if (!strcmp(var, "core.ignorestat")) {
660 assume_unchanged = git_config_bool(var, value);
661 return 0;
662 }
663
e388c738
JH
664 if (!strcmp(var, "core.prefersymlinkrefs")) {
665 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
666 return 0;
667 }
668
6de08ae6
SP
669 if (!strcmp(var, "core.logallrefupdates")) {
670 log_all_ref_updates = git_config_bool(var, value);
671 return 0;
672 }
673
2f8acdb3
JH
674 if (!strcmp(var, "core.warnambiguousrefs")) {
675 warn_ambiguous_refs = git_config_bool(var, value);
676 return 0;
677 }
678
a71f09fe 679 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
680 int abbrev = git_config_int(var, value);
681 if (abbrev < minimum_abbrev || abbrev > 40)
682 return -1;
683 default_abbrev = abbrev;
684 return 0;
685 }
686
960ccca6 687 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
688 int level = git_config_int(var, value);
689 if (level == -1)
690 level = Z_DEFAULT_COMPRESSION;
691 else if (level < 0 || level > Z_BEST_COMPRESSION)
692 die("bad zlib compression level %d", level);
693 zlib_compression_level = level;
960ccca6
DH
694 zlib_compression_seen = 1;
695 return 0;
696 }
697
698 if (!strcmp(var, "core.compression")) {
699 int level = git_config_int(var, value);
700 if (level == -1)
701 level = Z_DEFAULT_COMPRESSION;
702 else if (level < 0 || level > Z_BEST_COMPRESSION)
703 die("bad zlib compression level %d", level);
704 core_compression_level = level;
705 core_compression_seen = 1;
706 if (!zlib_compression_seen)
707 zlib_compression_level = level;
12f6c308
JBH
708 return 0;
709 }
710
60bb8b14 711 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 712 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 713 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
714
715 /* This value must be multiple of (pagesize * 2) */
716 packed_git_window_size /= pgsz_x2;
717 if (packed_git_window_size < 1)
718 packed_git_window_size = 1;
719 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
720 return 0;
721 }
722
15366280 723 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 724 big_file_threshold = git_config_ulong(var, value);
15366280
JH
725 return 0;
726 }
727
77ccc5bb 728 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 729 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
730 return 0;
731 }
732
18bdec11 733 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 734 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
735 return 0;
736 }
737
6c510bee 738 if (!strcmp(var, "core.autocrlf")) {
d7f46334 739 if (value && !strcasecmp(value, "input")) {
ec70f52f 740 if (core_eol == EOL_CRLF)
942e7747 741 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 742 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
743 return 0;
744 }
6c510bee
LT
745 auto_crlf = git_config_bool(var, value);
746 return 0;
747 }
748
21e5ad50
SP
749 if (!strcmp(var, "core.safecrlf")) {
750 if (value && !strcasecmp(value, "warn")) {
751 safe_crlf = SAFE_CRLF_WARN;
752 return 0;
753 }
754 safe_crlf = git_config_bool(var, value);
755 return 0;
756 }
757
942e7747
EB
758 if (!strcmp(var, "core.eol")) {
759 if (value && !strcasecmp(value, "lf"))
ec70f52f 760 core_eol = EOL_LF;
942e7747 761 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 762 core_eol = EOL_CRLF;
942e7747 763 else if (value && !strcasecmp(value, "native"))
ec70f52f 764 core_eol = EOL_NATIVE;
942e7747 765 else
ec70f52f
JH
766 core_eol = EOL_UNSET;
767 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
768 return error("core.autocrlf=input conflicts with core.eol=crlf");
769 return 0;
770 }
771
a97a7468
JS
772 if (!strcmp(var, "core.notesref")) {
773 notes_ref_name = xstrdup(value);
774 return 0;
775 }
776
806e2ad7
LT
777 if (!strcmp(var, "core.pager"))
778 return git_config_string(&pager_program, var, value);
779
780 if (!strcmp(var, "core.editor"))
781 return git_config_string(&editor_program, var, value);
782
eff80a9f
JH
783 if (!strcmp(var, "core.commentchar")) {
784 const char *comment;
785 int ret = git_config_string(&comment, var, value);
786 if (!ret)
787 comment_line_char = comment[0];
788 return ret;
789 }
790
d3e7da89
AK
791 if (!strcmp(var, "core.askpass"))
792 return git_config_string(&askpass_program, var, value);
793
806e2ad7 794 if (!strcmp(var, "core.excludesfile"))
395de250 795 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
796
797 if (!strcmp(var, "core.whitespace")) {
798 if (!value)
799 return config_error_nonbool(var);
800 whitespace_rule_cfg = parse_whitespace_rule(value);
801 return 0;
802 }
803
aafe9fba
LT
804 if (!strcmp(var, "core.fsyncobjectfiles")) {
805 fsync_object_files = git_config_bool(var, value);
806 return 0;
807 }
808
671c9b7e
LT
809 if (!strcmp(var, "core.preloadindex")) {
810 core_preload_index = git_config_bool(var, value);
811 return 0;
812 }
813
348df166
JS
814 if (!strcmp(var, "core.createobject")) {
815 if (!strcmp(value, "rename"))
816 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
817 else if (!strcmp(value, "link"))
818 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
819 else
820 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
821 return 0;
822 }
823
08aefc9e
NTND
824 if (!strcmp(var, "core.sparsecheckout")) {
825 core_apply_sparse_checkout = git_config_bool(var, value);
826 return 0;
827 }
828
76759c7d
TB
829 if (!strcmp(var, "core.precomposeunicode")) {
830 precomposed_unicode = git_config_bool(var, value);
831 return 0;
832 }
833
806e2ad7
LT
834 /* Add other config variables here and to Documentation/config.txt. */
835 return 0;
836}
837
1141f492 838static int git_default_i18n_config(const char *var, const char *value)
d1364529 839{
ea5105a5
CC
840 if (!strcmp(var, "i18n.commitencoding"))
841 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 842
ea5105a5
CC
843 if (!strcmp(var, "i18n.logoutputencoding"))
844 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 845
1141f492
LT
846 /* Add other config variables here and to Documentation/config.txt. */
847 return 0;
848}
039bc64e 849
1141f492
LT
850static int git_default_branch_config(const char *var, const char *value)
851{
9ed36cfa
JS
852 if (!strcmp(var, "branch.autosetupmerge")) {
853 if (value && !strcasecmp(value, "always")) {
854 git_branch_track = BRANCH_TRACK_ALWAYS;
855 return 0;
856 }
857 git_branch_track = git_config_bool(var, value);
858 return 0;
859 }
c998ae9b
DS
860 if (!strcmp(var, "branch.autosetuprebase")) {
861 if (!value)
862 return config_error_nonbool(var);
863 else if (!strcmp(value, "never"))
864 autorebase = AUTOREBASE_NEVER;
865 else if (!strcmp(value, "local"))
866 autorebase = AUTOREBASE_LOCAL;
867 else if (!strcmp(value, "remote"))
868 autorebase = AUTOREBASE_REMOTE;
869 else if (!strcmp(value, "always"))
870 autorebase = AUTOREBASE_ALWAYS;
871 else
872 return error("Malformed value for %s", var);
873 return 0;
874 }
a9cc857a 875
1ab661dd 876 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
877 return 0;
878}
879
52153747
FAG
880static int git_default_push_config(const char *var, const char *value)
881{
882 if (!strcmp(var, "push.default")) {
883 if (!value)
884 return config_error_nonbool(var);
885 else if (!strcmp(value, "nothing"))
886 push_default = PUSH_DEFAULT_NOTHING;
887 else if (!strcmp(value, "matching"))
888 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
889 else if (!strcmp(value, "simple"))
890 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
891 else if (!strcmp(value, "upstream"))
892 push_default = PUSH_DEFAULT_UPSTREAM;
893 else if (!strcmp(value, "tracking")) /* deprecated */
894 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
895 else if (!strcmp(value, "current"))
896 push_default = PUSH_DEFAULT_CURRENT;
897 else {
898 error("Malformed value for %s: %s", var, value);
b55e6775
MM
899 return error("Must be one of nothing, matching, simple, "
900 "upstream or current.");
52153747
FAG
901 }
902 return 0;
903 }
904
905 /* Add other config variables here and to Documentation/config.txt. */
906 return 0;
907}
908
d551a488
MSO
909static int git_default_mailmap_config(const char *var, const char *value)
910{
911 if (!strcmp(var, "mailmap.file"))
912 return git_config_string(&git_mailmap_file, var, value);
08610900
JK
913 if (!strcmp(var, "mailmap.blob"))
914 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
915
916 /* Add other config variables here and to Documentation/config.txt. */
917 return 0;
918}
919
1141f492
LT
920int git_default_config(const char *var, const char *value, void *dummy)
921{
922 if (!prefixcmp(var, "core."))
923 return git_default_core_config(var, value);
924
925 if (!prefixcmp(var, "user."))
9597921b 926 return git_ident_config(var, value, dummy);
1141f492
LT
927
928 if (!prefixcmp(var, "i18n."))
929 return git_default_i18n_config(var, value);
930
931 if (!prefixcmp(var, "branch."))
932 return git_default_branch_config(var, value);
933
52153747
FAG
934 if (!prefixcmp(var, "push."))
935 return git_default_push_config(var, value);
936
d551a488
MSO
937 if (!prefixcmp(var, "mailmap."))
938 return git_default_mailmap_config(var, value);
939
75194438
JK
940 if (!prefixcmp(var, "advice."))
941 return git_default_advice_config(var, value);
942
1141f492
LT
943 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
944 pager_use_color = git_config_bool(var,value);
945 return 0;
946 }
947
568508e7
JH
948 if (!strcmp(var, "pack.packsizelimit")) {
949 pack_size_limit_cfg = git_config_ulong(var, value);
950 return 0;
951 }
1141f492
LT
952 /* Add other config variables here and to Documentation/config.txt. */
953 return 0;
954}
955
ca4b5de2 956/*
b2dc0945 957 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 958 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
959 * this function.
960 */
4d8dd149 961static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
962{
963 int ret;
964
965 /* push config-file parsing state stack */
966 top->prev = cf;
967 top->linenr = 1;
968 top->eof = 0;
969 strbuf_init(&top->value, 1024);
970 strbuf_init(&top->var, 1024);
971 cf = top;
972
4d8dd149 973 ret = git_parse_source(fn, data);
ca4b5de2
HV
974
975 /* pop config-file parsing state stack */
976 strbuf_release(&top->value);
977 strbuf_release(&top->var);
978 cf = top->prev;
979
980 return ret;
981}
982
ef90d6d4 983int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
984{
985 int ret;
4f629539 986 FILE *f = fopen(filename, "r");
17712991
LT
987
988 ret = -1;
989 if (f) {
4d8dd149 990 struct config_source top;
924aaf3e 991
4d8dd149 992 top.u.file = f;
924aaf3e 993 top.name = filename;
b2dc0945 994 top.die_on_error = 1;
4d8dd149
HV
995 top.fgetc = config_file_fgetc;
996 top.ungetc = config_file_ungetc;
997 top.ftell = config_file_ftell;
924aaf3e 998
ca4b5de2 999 ret = do_config_from(&top, fn, data);
924aaf3e 1000
17712991
LT
1001 fclose(f);
1002 }
1003 return ret;
1004}
10bea152 1005
1bc88819
HV
1006int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1007 size_t len, void *data)
1008{
1009 struct config_source top;
1010
1011 top.u.buf.buf = buf;
1012 top.u.buf.len = len;
1013 top.u.buf.pos = 0;
1014 top.name = name;
b2dc0945 1015 top.die_on_error = 0;
1bc88819
HV
1016 top.fgetc = config_buf_fgetc;
1017 top.ungetc = config_buf_ungetc;
1018 top.ftell = config_buf_ftell;
1019
1020 return do_config_from(&top, fn, data);
1021}
1022
1023static int git_config_from_blob_sha1(config_fn_t fn,
1024 const char *name,
1025 const unsigned char *sha1,
1026 void *data)
1027{
1028 enum object_type type;
1029 char *buf;
1030 unsigned long size;
1031 int ret;
1032
1033 buf = read_sha1_file(sha1, &type, &size);
1034 if (!buf)
1035 return error("unable to load config blob object '%s'", name);
1036 if (type != OBJ_BLOB) {
1037 free(buf);
1038 return error("reference '%s' does not point to a blob", name);
1039 }
1040
1041 ret = git_config_from_buf(fn, name, buf, size, data);
1042 free(buf);
1043
1044 return ret;
1045}
1046
1047static int git_config_from_blob_ref(config_fn_t fn,
1048 const char *name,
1049 void *data)
1050{
1051 unsigned char sha1[20];
1052
1053 if (get_sha1(name, sha1) < 0)
1054 return error("unable to resolve config blob '%s'", name);
1055 return git_config_from_blob_sha1(fn, name, sha1, data);
1056}
1057
506b17b1
JS
1058const char *git_etc_gitconfig(void)
1059{
7f0e39fa 1060 static const char *system_wide;
2de9de5e
SP
1061 if (!system_wide)
1062 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1063 return system_wide;
506b17b1
JS
1064}
1065
0ef37164 1066int git_env_bool(const char *k, int def)
ab88c363
JK
1067{
1068 const char *v = getenv(k);
1069 return v ? git_config_bool(k, v) : def;
1070}
1071
1072int git_config_system(void)
1073{
1074 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1075}
1076
dbdf5854 1077int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1078{
aa387407 1079 int ret = 0, found = 0;
21cf3227
HKNN
1080 char *xdg_config = NULL;
1081 char *user_config = NULL;
1082
1083 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 1084
4698c8fe 1085 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1086 ret += git_config_from_file(fn, git_etc_gitconfig(),
1087 data);
aa387407
FC
1088 found += 1;
1089 }
5f1a63e0 1090
4698c8fe 1091 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1092 ret += git_config_from_file(fn, xdg_config, data);
1093 found += 1;
1094 }
1095
4698c8fe 1096 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1097 ret += git_config_from_file(fn, user_config, data);
1098 found += 1;
5f1a63e0
JS
1099 }
1100
4698c8fe 1101 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1102 ret += git_config_from_file(fn, repo_config, data);
1103 found += 1;
1104 }
8b1fa778 1105
5a0c9eeb
JK
1106 switch (git_config_from_parameters(fn, data)) {
1107 case -1: /* error */
1c2c9bee 1108 die("unable to parse command-line config");
5a0c9eeb
JK
1109 break;
1110 case 0: /* found nothing */
1111 break;
1112 default: /* found at least one item */
1113 found++;
1114 break;
1115 }
8b1fa778 1116
21cf3227
HKNN
1117 free(xdg_config);
1118 free(user_config);
1f2baa78 1119 return ret == 0 ? found : ret;
4f629539
JH
1120}
1121
c9b5e2a5 1122int git_config_with_options(config_fn_t fn, void *data,
1bc88819
HV
1123 const char *filename,
1124 const char *blob_ref,
1125 int respect_includes)
dbdf5854
NTND
1126{
1127 char *repo_config = NULL;
1128 int ret;
9b25a0b5
JK
1129 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1130
1131 if (respect_includes) {
1132 inc.fn = fn;
1133 inc.data = data;
1134 fn = git_config_include;
1135 data = &inc;
1136 }
dbdf5854 1137
c9b5e2a5
JK
1138 /*
1139 * If we have a specific filename, use it. Otherwise, follow the
1140 * regular lookup sequence.
1141 */
1142 if (filename)
1143 return git_config_from_file(fn, filename, data);
1bc88819
HV
1144 else if (blob_ref)
1145 return git_config_from_blob_ref(fn, blob_ref, data);
c9b5e2a5 1146
dbdf5854
NTND
1147 repo_config = git_pathdup("config");
1148 ret = git_config_early(fn, data, repo_config);
1149 if (repo_config)
1150 free(repo_config);
1151 return ret;
1152}
1153
c9b5e2a5
JK
1154int git_config(config_fn_t fn, void *data)
1155{
1bc88819 1156 return git_config_with_options(fn, data, NULL, NULL, 1);
c9b5e2a5
JK
1157}
1158
10bea152
JS
1159/*
1160 * Find all the stuff for git_config_set() below.
1161 */
4ddba79d
JS
1162
1163#define MAX_MATCHES 512
1164
10bea152
JS
1165static struct {
1166 int baselen;
4b25d091 1167 char *key;
f98d863d 1168 int do_not_match;
4b25d091 1169 regex_t *value_regex;
4ddba79d 1170 int multi_replace;
dc49cd76 1171 size_t offset[MAX_MATCHES];
10bea152
JS
1172 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1173 int seen;
1174} store;
1175
4b25d091 1176static int matches(const char *key, const char *value)
f98d863d
JS
1177{
1178 return !strcmp(key, store.key) &&
1179 (store.value_regex == NULL ||
1180 (store.do_not_match ^
1181 !regexec(store.value_regex, value, 0, NULL, 0)));
1182}
1183
4b25d091 1184static int store_aux(const char *key, const char *value, void *cb)
10bea152 1185{
ae9ee41d
JH
1186 const char *ep;
1187 size_t section_len;
1188
10bea152
JS
1189 switch (store.state) {
1190 case KEY_SEEN:
f98d863d 1191 if (matches(key, value)) {
4ddba79d 1192 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1193 warning("%s has multiple values", key);
4ddba79d 1194 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 1195 error("too many matches for %s", key);
4ddba79d 1196 return 1;
10bea152 1197 }
4ddba79d 1198
4d8dd149 1199 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1200 store.seen++;
1201 }
1202 break;
1203 case SECTION_SEEN:
ae9ee41d
JH
1204 /*
1205 * What we are looking for is in store.key (both
1206 * section and var), and its section part is baselen
1207 * long. We found key (again, both section and var).
1208 * We would want to know if this key is in the same
1209 * section as what we are looking for. We already
1210 * know we are in the same section as what should
1211 * hold store.key.
1212 */
1213 ep = strrchr(key, '.');
1214 section_len = ep - key;
1215
1216 if ((section_len != store.baselen) ||
1217 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1218 store.state = SECTION_END_SEEN;
1219 break;
ae9ee41d
JH
1220 }
1221
1222 /*
1223 * Do not increment matches: this is no match, but we
1224 * just made sure we are in the desired section.
1225 */
4d8dd149 1226 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1227 /* fallthru */
1228 case SECTION_END_SEEN:
1229 case START:
f98d863d 1230 if (matches(key, value)) {
4d8dd149 1231 store.offset[store.seen] = cf->ftell(cf);
10bea152
JS
1232 store.state = KEY_SEEN;
1233 store.seen++;
d14f7764
LT
1234 } else {
1235 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1236 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1237 store.state = SECTION_SEEN;
4d8dd149 1238 store.offset[store.seen] = cf->ftell(cf);
d14f7764 1239 }
bdf0ef08 1240 }
10bea152
JS
1241 }
1242 return 0;
1243}
1244
64c0d71c 1245static int write_error(const char *filename)
480c9e52 1246{
64c0d71c 1247 error("failed to write new configuration file %s", filename);
480c9e52
AW
1248
1249 /* Same error code as "failed to rename". */
1250 return 4;
1251}
1252
4b25d091 1253static int store_write_section(int fd, const char *key)
10bea152 1254{
cb891a59
KH
1255 const char *dot;
1256 int i, success;
f285a2d7 1257 struct strbuf sb = STRBUF_INIT;
d14f7764 1258
cb891a59 1259 dot = memchr(key, '.', store.baselen);
d14f7764 1260 if (dot) {
cb891a59
KH
1261 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1262 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1263 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1264 strbuf_addch(&sb, '\\');
1265 strbuf_addch(&sb, key[i]);
d14f7764 1266 }
cb891a59
KH
1267 strbuf_addstr(&sb, "\"]\n");
1268 } else {
1269 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1270 }
1271
cb891a59
KH
1272 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1273 strbuf_release(&sb);
480c9e52 1274
cb891a59 1275 return success;
10bea152
JS
1276}
1277
4b25d091 1278static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1279{
cb891a59
KH
1280 int i, success;
1281 int length = strlen(key + store.baselen + 1);
1282 const char *quote = "";
f285a2d7 1283 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1284
6281f394
JM
1285 /*
1286 * Check to see if the value needs to be surrounded with a dq pair.
1287 * Note that problematic characters are always backslash-quoted; this
1288 * check is about not losing leading or trailing SP and strings that
1289 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1290 * configuration parser.
1291 */
cdd4fb15 1292 if (value[0] == ' ')
cb891a59 1293 quote = "\"";
cdd4fb15
BG
1294 for (i = 0; value[i]; i++)
1295 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1296 quote = "\"";
1297 if (i && value[i - 1] == ' ')
1298 quote = "\"";
1299
cb891a59
KH
1300 strbuf_addf(&sb, "\t%.*s = %s",
1301 length, key + store.baselen + 1, quote);
10bea152 1302
10bea152
JS
1303 for (i = 0; value[i]; i++)
1304 switch (value[i]) {
480c9e52 1305 case '\n':
cb891a59 1306 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1307 break;
1308 case '\t':
cb891a59 1309 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1310 break;
1311 case '"':
1312 case '\\':
cb891a59 1313 strbuf_addch(&sb, '\\');
480c9e52 1314 default:
cb891a59 1315 strbuf_addch(&sb, value[i]);
480c9e52
AW
1316 break;
1317 }
cb891a59
KH
1318 strbuf_addf(&sb, "%s\n", quote);
1319
1320 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1321 strbuf_release(&sb);
1322
1323 return success;
10bea152
JS
1324}
1325
4b25d091
FC
1326static ssize_t find_beginning_of_line(const char *contents, size_t size,
1327 size_t offset_, int *found_bracket)
4ddba79d 1328{
dc49cd76
SP
1329 size_t equal_offset = size, bracket_offset = size;
1330 ssize_t offset;
4ddba79d 1331
7a31cc0f 1332contline:
a6080a0a 1333 for (offset = offset_-2; offset > 0
4ddba79d
JS
1334 && contents[offset] != '\n'; offset--)
1335 switch (contents[offset]) {
1336 case '=': equal_offset = offset; break;
1337 case ']': bracket_offset = offset; break;
1338 }
7a31cc0f
FL
1339 if (offset > 0 && contents[offset-1] == '\\') {
1340 offset_ = offset;
1341 goto contline;
1342 }
4ddba79d
JS
1343 if (bracket_offset < equal_offset) {
1344 *found_bracket = 1;
1345 offset = bracket_offset+1;
1346 } else
1347 offset++;
1348
1349 return offset;
1350}
1351
5ec31182
RR
1352int git_config_set_in_file(const char *config_filename,
1353 const char *key, const char *value)
1354{
1355 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1356}
1357
4b25d091 1358int git_config_set(const char *key, const char *value)
10bea152 1359{
4ddba79d 1360 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1361}
1362
b09c53a3
LP
1363/*
1364 * Auxiliary function to sanity-check and split the key into the section
1365 * identifier and variable name.
1366 *
1367 * Returns 0 on success, -1 when there is an invalid character in the key and
1368 * -2 if there is no section name in the key.
1369 *
1370 * store_key - pointer to char* which will hold a copy of the key with
1371 * lowercase section and variable name
1372 * baselen - pointer to int which will hold the length of the
1373 * section + subsection part, can be NULL
1374 */
1375int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1376{
1377 int i, dot, baselen;
1378 const char *last_dot = strrchr(key, '.');
1379
1380 /*
1381 * Since "key" actually contains the section name and the real
1382 * key name separated by a dot, we have to know where the dot is.
1383 */
1384
2169ddc0 1385 if (last_dot == NULL || last_dot == key) {
b09c53a3 1386 error("key does not contain a section: %s", key);
7a397419 1387 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1388 }
1389
2169ddc0
LP
1390 if (!last_dot[1]) {
1391 error("key does not contain variable name: %s", key);
7a397419 1392 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1393 }
1394
b09c53a3
LP
1395 baselen = last_dot - key;
1396 if (baselen_)
1397 *baselen_ = baselen;
1398
1399 /*
1400 * Validate the key and while at it, lower case it for matching.
1401 */
1402 *store_key = xmalloc(strlen(key) + 1);
1403
1404 dot = 0;
1405 for (i = 0; key[i]; i++) {
1406 unsigned char c = key[i];
1407 if (c == '.')
1408 dot = 1;
1409 /* Leave the extended basename untouched.. */
1410 if (!dot || i > baselen) {
1411 if (!iskeychar(c) ||
1412 (i == baselen + 1 && !isalpha(c))) {
1413 error("invalid key: %s", key);
1414 goto out_free_ret_1;
1415 }
1416 c = tolower(c);
1417 } else if (c == '\n') {
1418 error("invalid key (newline): %s", key);
1419 goto out_free_ret_1;
1420 }
1421 (*store_key)[i] = c;
1422 }
1423 (*store_key)[i] = 0;
1424
1425 return 0;
1426
1427out_free_ret_1:
1428 free(*store_key);
97ed50f9 1429 *store_key = NULL;
7a397419 1430 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1431}
1432
10bea152
JS
1433/*
1434 * If value==NULL, unset in (remove from) config,
1435 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1436 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1437 * else all matching key/values (regardless how many) are removed,
1438 * before the new pair is written.
10bea152
JS
1439 *
1440 * Returns 0 on success.
1441 *
1442 * This function does this:
1443 *
1444 * - it locks the config file by creating ".git/config.lock"
1445 *
1446 * - it then parses the config using store_aux() as validator to find
1447 * the position on the key/value pair to replace. If it is to be unset,
1448 * it must be found exactly once.
1449 *
1450 * - the config file is mmap()ed and the part before the match (if any) is
1451 * written to the lock file, then the changed part and the rest.
1452 *
1453 * - the config file is removed and the lock file rename()d to it.
1454 *
1455 */
5ec31182
RR
1456int git_config_set_multivar_in_file(const char *config_filename,
1457 const char *key, const char *value,
1458 const char *value_regex, int multi_replace)
10bea152 1459{
f8ba655e 1460 int fd = -1, in_fd;
dafc88b1 1461 int ret;
6cbf973c 1462 struct lock_file *lock = NULL;
0a5f5759 1463 char *filename_buf = NULL;
4ddba79d 1464
b09c53a3
LP
1465 /* parse-key returns negative; flip the sign to feed exit(3) */
1466 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1467 if (ret)
dafc88b1 1468 goto out_free;
b17e659d
JS
1469
1470 store.multi_replace = multi_replace;
10bea152 1471
0a5f5759
JK
1472 if (!config_filename)
1473 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1474
1475 /*
6cbf973c 1476 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1477 * contents of .git/config will be written into it.
1478 */
6cbf973c
BS
1479 lock = xcalloc(sizeof(struct lock_file), 1);
1480 fd = hold_lock_file_for_update(lock, config_filename, 0);
1481 if (fd < 0) {
6ffd567b 1482 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1483 free(store.key);
7a397419 1484 ret = CONFIG_NO_LOCK;
dafc88b1 1485 goto out_free;
10bea152
JS
1486 }
1487
1488 /*
1489 * If .git/config does not exist yet, write a minimal version.
1490 */
88fb958b
AR
1491 in_fd = open(config_filename, O_RDONLY);
1492 if ( in_fd < 0 ) {
10bea152
JS
1493 free(store.key);
1494
88fb958b
AR
1495 if ( ENOENT != errno ) {
1496 error("opening %s: %s", config_filename,
1497 strerror(errno));
7a397419 1498 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1499 goto out_free;
88fb958b 1500 }
10bea152
JS
1501 /* if nothing to unset, error out */
1502 if (value == NULL) {
7a397419 1503 ret = CONFIG_NOTHING_SET;
dafc88b1 1504 goto out_free;
10bea152
JS
1505 }
1506
4b25d091 1507 store.key = (char *)key;
480c9e52 1508 if (!store_write_section(fd, key) ||
93c1e079
JH
1509 !store_write_pair(fd, key, value))
1510 goto write_err_out;
1511 } else {
88fb958b 1512 struct stat st;
4b25d091 1513 char *contents;
dc49cd76
SP
1514 size_t contents_sz, copy_begin, copy_end;
1515 int i, new_line = 0;
10bea152
JS
1516
1517 if (value_regex == NULL)
1518 store.value_regex = NULL;
1519 else {
f98d863d
JS
1520 if (value_regex[0] == '!') {
1521 store.do_not_match = 1;
1522 value_regex++;
1523 } else
1524 store.do_not_match = 0;
1525
2d7320d0 1526 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1527 if (regcomp(store.value_regex, value_regex,
1528 REG_EXTENDED)) {
64c0d71c 1529 error("invalid pattern: %s", value_regex);
10bea152 1530 free(store.value_regex);
7a397419 1531 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1532 goto out_free;
10bea152
JS
1533 }
1534 }
1535
4ddba79d 1536 store.offset[0] = 0;
10bea152
JS
1537 store.state = START;
1538 store.seen = 0;
1539
1540 /*
1541 * After this, store.offset will contain the *end* offset
1542 * of the last match, or remain at 0 if no match was found.
1543 * As a side effect, we make sure to transform only a valid
1544 * existing config file.
1545 */
ef90d6d4 1546 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1547 error("invalid config file %s", config_filename);
10bea152
JS
1548 free(store.key);
1549 if (store.value_regex != NULL) {
1550 regfree(store.value_regex);
1551 free(store.value_regex);
1552 }
7a397419 1553 ret = CONFIG_INVALID_FILE;
dafc88b1 1554 goto out_free;
10bea152
JS
1555 }
1556
1557 free(store.key);
1558 if (store.value_regex != NULL) {
1559 regfree(store.value_regex);
1560 free(store.value_regex);
1561 }
1562
4ddba79d
JS
1563 /* if nothing to unset, or too many matches, error out */
1564 if ((store.seen == 0 && value == NULL) ||
1565 (store.seen > 1 && multi_replace == 0)) {
7a397419 1566 ret = CONFIG_NOTHING_SET;
dafc88b1 1567 goto out_free;
10bea152
JS
1568 }
1569
88fb958b 1570 fstat(in_fd, &st);
dc49cd76
SP
1571 contents_sz = xsize_t(st.st_size);
1572 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1573 MAP_PRIVATE, in_fd, 0);
1574 close(in_fd);
1575
4ddba79d
JS
1576 if (store.seen == 0)
1577 store.seen = 1;
1578
1579 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1580 if (store.offset[i] == 0) {
dc49cd76 1581 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1582 } else if (store.state != KEY_SEEN) {
1583 copy_end = store.offset[i];
10bea152 1584 } else
4ddba79d 1585 copy_end = find_beginning_of_line(
dc49cd76 1586 contents, contents_sz,
4ddba79d
JS
1587 store.offset[i]-2, &new_line);
1588
02e5ba4a
JK
1589 if (copy_end > 0 && contents[copy_end-1] != '\n')
1590 new_line = 1;
1591
4ddba79d
JS
1592 /* write the first part of the config */
1593 if (copy_end > copy_begin) {
93c1e079
JH
1594 if (write_in_full(fd, contents + copy_begin,
1595 copy_end - copy_begin) <
1596 copy_end - copy_begin)
1597 goto write_err_out;
1598 if (new_line &&
2b7ca830 1599 write_str_in_full(fd, "\n") != 1)
93c1e079 1600 goto write_err_out;
4ddba79d
JS
1601 }
1602 copy_begin = store.offset[i];
10bea152
JS
1603 }
1604
10bea152
JS
1605 /* write the pair (value == NULL means unset) */
1606 if (value != NULL) {
93c1e079
JH
1607 if (store.state == START) {
1608 if (!store_write_section(fd, key))
1609 goto write_err_out;
480c9e52 1610 }
93c1e079
JH
1611 if (!store_write_pair(fd, key, value))
1612 goto write_err_out;
10bea152
JS
1613 }
1614
1615 /* write the rest of the config */
dc49cd76 1616 if (copy_begin < contents_sz)
93c1e079 1617 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1618 contents_sz - copy_begin) <
1619 contents_sz - copy_begin)
93c1e079 1620 goto write_err_out;
10bea152 1621
dc49cd76 1622 munmap(contents, contents_sz);
10bea152
JS
1623 }
1624
4ed7cd3a 1625 if (commit_lock_file(lock) < 0) {
64c0d71c 1626 error("could not commit config file %s", config_filename);
7a397419 1627 ret = CONFIG_NO_WRITE;
dafc88b1 1628 goto out_free;
10bea152
JS
1629 }
1630
6cbf973c
BS
1631 /*
1632 * lock is committed, so don't try to roll it back below.
1633 * NOTE: Since lockfile.c keeps a linked list of all created
1634 * lock_file structures, it isn't safe to free(lock). It's
1635 * better to just leave it hanging around.
1636 */
1637 lock = NULL;
dafc88b1
SH
1638 ret = 0;
1639
1640out_free:
6cbf973c
BS
1641 if (lock)
1642 rollback_lock_file(lock);
0a5f5759 1643 free(filename_buf);
dafc88b1 1644 return ret;
93c1e079
JH
1645
1646write_err_out:
64c0d71c 1647 ret = write_error(lock->filename);
93c1e079
JH
1648 goto out_free;
1649
10bea152
JS
1650}
1651
5ec31182
RR
1652int git_config_set_multivar(const char *key, const char *value,
1653 const char *value_regex, int multi_replace)
1654{
4a7bb5ba 1655 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1656 multi_replace);
5ec31182
RR
1657}
1658
118f8b24
PB
1659static int section_name_match (const char *buf, const char *name)
1660{
1661 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1662 if (buf[i] != '[')
1663 return 0;
1664 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1665 if (!dot && isspace(buf[i])) {
1666 dot = 1;
1667 if (name[j++] != '.')
1668 break;
1669 for (i++; isspace(buf[i]); i++)
1670 ; /* do nothing */
1671 if (buf[i] != '"')
1672 break;
1673 continue;
1674 }
1675 if (buf[i] == '\\' && dot)
1676 i++;
1677 else if (buf[i] == '"' && dot) {
1678 for (i++; isspace(buf[i]); i++)
1679 ; /* do_nothing */
1680 break;
1681 }
1682 if (buf[i] != name[j++])
1683 break;
1684 }
a4c0d463
AV
1685 if (buf[i] == ']' && name[j] == 0) {
1686 /*
1687 * We match, now just find the right length offset by
1688 * gobbling up any whitespace after it, as well
1689 */
1690 i++;
1691 for (; buf[i] && isspace(buf[i]); i++)
1692 ; /* do nothing */
1693 return i;
1694 }
1695 return 0;
118f8b24
PB
1696}
1697
94a35b1a
JK
1698static int section_name_is_ok(const char *name)
1699{
1700 /* Empty section names are bogus. */
1701 if (!*name)
1702 return 0;
1703
1704 /*
1705 * Before a dot, we must be alphanumeric or dash. After the first dot,
1706 * anything goes, so we can stop checking.
1707 */
1708 for (; *name && *name != '.'; name++)
1709 if (*name != '-' && !isalnum(*name))
1710 return 0;
1711 return 1;
1712}
1713
118f8b24 1714/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1715int git_config_rename_section_in_file(const char *config_filename,
1716 const char *old_name, const char *new_name)
0667fcfb 1717{
118f8b24 1718 int ret = 0, remove = 0;
42bd39b5 1719 char *filename_buf = NULL;
94a35b1a 1720 struct lock_file *lock;
0667fcfb
JS
1721 int out_fd;
1722 char buf[1024];
924aaf3e 1723 FILE *config_file;
0667fcfb 1724
94a35b1a
JK
1725 if (new_name && !section_name_is_ok(new_name)) {
1726 ret = error("invalid section name: %s", new_name);
1727 goto out;
1728 }
1729
42bd39b5
JK
1730 if (!config_filename)
1731 config_filename = filename_buf = git_pathdup("config");
1732
94a35b1a 1733 lock = xcalloc(sizeof(struct lock_file), 1);
0667fcfb 1734 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1735 if (out_fd < 0) {
64c0d71c 1736 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1737 goto out;
1738 }
0667fcfb 1739
fc1905bb 1740 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1741 /* no config file means nothing to rename, no error */
1742 goto unlock_and_out;
fc1905bb 1743 }
0667fcfb
JS
1744
1745 while (fgets(buf, sizeof(buf), config_file)) {
1746 int i;
480c9e52 1747 int length;
9a5abfc7 1748 char *output = buf;
0667fcfb
JS
1749 for (i = 0; buf[i] && isspace(buf[i]); i++)
1750 ; /* do nothing */
1751 if (buf[i] == '[') {
1752 /* it's a section */
a4c0d463
AV
1753 int offset = section_name_match(&buf[i], old_name);
1754 if (offset > 0) {
118f8b24
PB
1755 ret++;
1756 if (new_name == NULL) {
1757 remove = 1;
0667fcfb
JS
1758 continue;
1759 }
0667fcfb 1760 store.baselen = strlen(new_name);
480c9e52 1761 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1762 ret = write_error(lock->filename);
480c9e52
AW
1763 goto out;
1764 }
9a5abfc7
AV
1765 /*
1766 * We wrote out the new section, with
1767 * a newline, now skip the old
1768 * section's length
1769 */
1770 output += offset + i;
1771 if (strlen(output) > 0) {
1772 /*
1773 * More content means there's
1774 * a declaration to put on the
1775 * next line; indent with a
1776 * tab
1777 */
1778 output -= 1;
1779 output[0] = '\t';
1780 }
0667fcfb 1781 }
118f8b24 1782 remove = 0;
0667fcfb 1783 }
118f8b24
PB
1784 if (remove)
1785 continue;
9a5abfc7
AV
1786 length = strlen(output);
1787 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1788 ret = write_error(lock->filename);
480c9e52
AW
1789 goto out;
1790 }
0667fcfb 1791 }
fc1905bb 1792 fclose(config_file);
8b590075 1793unlock_and_out:
4ed7cd3a 1794 if (commit_lock_file(lock) < 0)
64c0d71c 1795 ret = error("could not commit config file %s", config_filename);
8b590075 1796out:
42bd39b5 1797 free(filename_buf);
0667fcfb
JS
1798 return ret;
1799}
40ea4ed9 1800
42bd39b5
JK
1801int git_config_rename_section(const char *old_name, const char *new_name)
1802{
4a7bb5ba 1803 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1804}
1805
40ea4ed9
JH
1806/*
1807 * Call this to report error for your variable that should not
1808 * get a boolean value (i.e. "[my] var" means "true").
1809 */
a469a101 1810#undef config_error_nonbool
40ea4ed9
JH
1811int config_error_nonbool(const char *var)
1812{
1813 return error("Missing value for '%s'", var);
1814}
1b86bbb0
JK
1815
1816int parse_config_key(const char *var,
1817 const char *section,
1818 const char **subsection, int *subsection_len,
1819 const char **key)
1820{
1821 int section_len = strlen(section);
1822 const char *dot;
1823
1824 /* Does it start with "section." ? */
1825 if (prefixcmp(var, section) || var[section_len] != '.')
1826 return -1;
1827
1828 /*
1829 * Find the key; we don't know yet if we have a subsection, but we must
1830 * parse backwards from the end, since the subsection may have dots in
1831 * it, too.
1832 */
1833 dot = strrchr(var, '.');
1834 *key = dot + 1;
1835
1836 /* Did we have a subsection at all? */
1837 if (dot == var + section_len) {
1838 *subsection = NULL;
1839 *subsection_len = 0;
1840 }
1841 else {
1842 *subsection = var + section_len + 1;
1843 *subsection_len = dot - *subsection;
1844 }
1845
1846 return 0;
1847}