config: factor out config file stack management
[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
924aaf3e
RJ
13typedef struct config_file {
14 struct config_file *prev;
15 FILE *f;
16 const char *name;
17 int linenr;
18 int eof;
19 struct strbuf value;
0971e992 20 struct strbuf var;
924aaf3e
RJ
21} config_file;
22
23static config_file *cf;
24
960ccca6
DH
25static int zlib_compression_seen;
26
9b25a0b5
JK
27#define MAX_INCLUDE_DEPTH 10
28static const char include_depth_advice[] =
29"exceeded maximum include depth (%d) while including\n"
30" %s\n"
31"from\n"
32" %s\n"
33"Do you have circular includes?";
34static int handle_path_include(const char *path, struct config_include_data *inc)
35{
36 int ret = 0;
37 struct strbuf buf = STRBUF_INIT;
4c0a89fc
JK
38 char *expanded = expand_user_path(path);
39
40 if (!expanded)
41 return error("Could not expand include path '%s'", path);
42 path = expanded;
9b25a0b5
JK
43
44 /*
45 * Use an absolute path as-is, but interpret relative paths
46 * based on the including config file.
47 */
48 if (!is_absolute_path(path)) {
49 char *slash;
50
51 if (!cf || !cf->name)
52 return error("relative config includes must come from files");
53
54 slash = find_last_dir_sep(cf->name);
55 if (slash)
56 strbuf_add(&buf, cf->name, slash - cf->name + 1);
57 strbuf_addstr(&buf, path);
58 path = buf.buf;
59 }
60
8f2bbe45 61 if (!access_or_die(path, R_OK)) {
9b25a0b5
JK
62 if (++inc->depth > MAX_INCLUDE_DEPTH)
63 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
64 cf && cf->name ? cf->name : "the command line");
65 ret = git_config_from_file(git_config_include, path, inc);
66 inc->depth--;
67 }
68 strbuf_release(&buf);
4c0a89fc 69 free(expanded);
9b25a0b5
JK
70 return ret;
71}
72
73int git_config_include(const char *var, const char *value, void *data)
74{
75 struct config_include_data *inc = data;
76 const char *type;
77 int ret;
78
79 /*
80 * Pass along all values, including "include" directives; this makes it
81 * possible to query information on the includes themselves.
82 */
83 ret = inc->fn(var, value, inc->data);
84 if (ret < 0)
85 return ret;
86
87 type = skip_prefix(var, "include.");
88 if (!type)
89 return ret;
90
91 if (!strcmp(type, "path"))
92 ret = handle_path_include(value, inc);
93 return ret;
94}
95
8b1fa778
AR
96static void lowercase(char *p)
97{
98 for (; *p; p++)
99 *p = tolower(*p);
100}
8b1fa778 101
2b64fc89
JK
102void git_config_push_parameter(const char *text)
103{
104 struct strbuf env = STRBUF_INIT;
105 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
106 if (old) {
107 strbuf_addstr(&env, old);
108 strbuf_addch(&env, ' ');
109 }
110 sq_quote_buf(&env, text);
111 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
112 strbuf_release(&env);
113}
114
2496844b
JK
115int git_config_parse_parameter(const char *text,
116 config_fn_t fn, void *data)
8b1fa778 117{
572e4f6a 118 struct strbuf **pair;
f77bccae 119 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
120 if (!pair[0])
121 return error("bogus config parameter: %s", text);
572e4f6a
AR
122 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
123 strbuf_setlen(pair[0], pair[0]->len - 1);
124 strbuf_trim(pair[0]);
125 if (!pair[0]->len) {
126 strbuf_list_free(pair);
06eb708f 127 return error("bogus config parameter: %s", text);
8b1fa778 128 }
06eb708f
JK
129 lowercase(pair[0]->buf);
130 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
131 strbuf_list_free(pair);
132 return -1;
572e4f6a
AR
133 }
134 strbuf_list_free(pair);
8b1fa778
AR
135 return 0;
136}
137
06eb708f
JK
138int git_config_from_parameters(config_fn_t fn, void *data)
139{
2b64fc89
JK
140 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
141 char *envw;
142 const char **argv = NULL;
143 int nr = 0, alloc = 0;
144 int i;
145
146 if (!env)
147 return 0;
148 /* sq_dequote will write over it */
149 envw = xstrdup(env);
150
151 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
152 free(envw);
153 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
154 }
155
156 for (i = 0; i < nr; i++) {
06eb708f 157 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
158 free(argv);
159 free(envw);
160 return -1;
161 }
162 }
163
164 free(argv);
165 free(envw);
06eb708f 166 return nr > 0;
2b64fc89
JK
167}
168
17712991
LT
169static int get_next_char(void)
170{
171 int c;
172 FILE *f;
173
174 c = '\n';
924aaf3e 175 if (cf && ((f = cf->f) != NULL)) {
17712991 176 c = fgetc(f);
db2c075d
JH
177 if (c == '\r') {
178 /* DOS like systems */
179 c = fgetc(f);
180 if (c != '\n') {
181 ungetc(c, f);
182 c = '\r';
183 }
184 }
17712991 185 if (c == '\n')
924aaf3e 186 cf->linenr++;
17712991 187 if (c == EOF) {
924aaf3e 188 cf->eof = 1;
17712991
LT
189 c = '\n';
190 }
191 }
192 return c;
193}
194
195static char *parse_value(void)
196{
e96c19c5 197 int quote = 0, comment = 0, space = 0;
17712991 198
924aaf3e 199 strbuf_reset(&cf->value);
17712991
LT
200 for (;;) {
201 int c = get_next_char();
17712991 202 if (c == '\n') {
4b340593
MS
203 if (quote) {
204 cf->linenr--;
17712991 205 return NULL;
4b340593 206 }
924aaf3e 207 return cf->value.buf;
17712991
LT
208 }
209 if (comment)
210 continue;
211 if (isspace(c) && !quote) {
924aaf3e 212 if (cf->value.len)
ebdaae37 213 space++;
17712991
LT
214 continue;
215 }
7ebdba61
JS
216 if (!quote) {
217 if (c == ';' || c == '#') {
218 comment = 1;
219 continue;
220 }
221 }
ebdaae37 222 for (; space; space--)
924aaf3e 223 strbuf_addch(&cf->value, ' ');
17712991
LT
224 if (c == '\\') {
225 c = get_next_char();
226 switch (c) {
227 case '\n':
228 continue;
229 case 't':
230 c = '\t';
231 break;
232 case 'b':
233 c = '\b';
234 break;
235 case 'n':
236 c = '\n';
237 break;
5cbb401d
LT
238 /* Some characters escape as themselves */
239 case '\\': case '"':
240 break;
241 /* Reject unknown escape sequences */
242 default:
243 return NULL;
17712991 244 }
924aaf3e 245 strbuf_addch(&cf->value, c);
17712991
LT
246 continue;
247 }
248 if (c == '"') {
249 quote = 1-quote;
250 continue;
251 }
924aaf3e 252 strbuf_addch(&cf->value, c);
17712991
LT
253 }
254}
255
38c5afa8
LT
256static inline int iskeychar(int c)
257{
258 return isalnum(c) || c == '-';
259}
260
0971e992 261static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
262{
263 int c;
264 char *value;
265
266 /* Get the full name */
267 for (;;) {
268 c = get_next_char();
924aaf3e 269 if (cf->eof)
17712991 270 break;
38c5afa8 271 if (!iskeychar(c))
17712991 272 break;
0971e992 273 strbuf_addch(name, tolower(c));
17712991 274 }
0971e992 275
17712991
LT
276 while (c == ' ' || c == '\t')
277 c = get_next_char();
278
279 value = NULL;
280 if (c != '\n') {
281 if (c != '=')
282 return -1;
283 value = parse_value();
284 if (!value)
285 return -1;
286 }
0971e992 287 return fn(name->buf, value, data);
17712991
LT
288}
289
0971e992 290static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
291{
292 do {
293 if (c == '\n')
4b340593 294 goto error_incomplete_line;
d14f7764
LT
295 c = get_next_char();
296 } while (isspace(c));
297
298 /* We require the format to be '[base "extension"]' */
299 if (c != '"')
300 return -1;
0971e992 301 strbuf_addch(name, '.');
d14f7764
LT
302
303 for (;;) {
304 int c = get_next_char();
305 if (c == '\n')
4b340593 306 goto error_incomplete_line;
d14f7764
LT
307 if (c == '"')
308 break;
309 if (c == '\\') {
310 c = get_next_char();
311 if (c == '\n')
4b340593 312 goto error_incomplete_line;
d14f7764 313 }
0971e992 314 strbuf_addch(name, c);
d14f7764
LT
315 }
316
317 /* Final ']' */
318 if (get_next_char() != ']')
319 return -1;
0971e992 320 return 0;
4b340593
MS
321error_incomplete_line:
322 cf->linenr--;
323 return -1;
d14f7764
LT
324}
325
0971e992 326static int get_base_var(struct strbuf *name)
17712991 327{
17712991
LT
328 for (;;) {
329 int c = get_next_char();
924aaf3e 330 if (cf->eof)
17712991
LT
331 return -1;
332 if (c == ']')
0971e992 333 return 0;
d14f7764 334 if (isspace(c))
0971e992 335 return get_extended_base_var(name, c);
38c5afa8 336 if (!iskeychar(c) && c != '.')
17712991 337 return -1;
0971e992 338 strbuf_addch(name, tolower(c));
17712991
LT
339 }
340}
341
ef90d6d4 342static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
343{
344 int comment = 0;
345 int baselen = 0;
0971e992 346 struct strbuf *var = &cf->var;
17712991 347
de056402
PB
348 /* U+FEFF Byte Order Mark in UTF8 */
349 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
350 const unsigned char *bomptr = utf8_bom;
351
17712991
LT
352 for (;;) {
353 int c = get_next_char();
de056402
PB
354 if (bomptr && *bomptr) {
355 /* We are at the file beginning; skip UTF8-encoded BOM
356 * if present. Sane editors won't put this in on their
357 * own, but e.g. Windows Notepad will do it happily. */
358 if ((unsigned char) c == *bomptr) {
359 bomptr++;
360 continue;
361 } else {
362 /* Do not tolerate partial BOM. */
363 if (bomptr != utf8_bom)
364 break;
365 /* No BOM at file beginning. Cool. */
366 bomptr = NULL;
367 }
368 }
17712991 369 if (c == '\n') {
924aaf3e 370 if (cf->eof)
17712991
LT
371 return 0;
372 comment = 0;
373 continue;
374 }
375 if (comment || isspace(c))
376 continue;
377 if (c == '#' || c == ';') {
378 comment = 1;
379 continue;
380 }
381 if (c == '[') {
0971e992
BW
382 /* Reset prior to determining a new stem */
383 strbuf_reset(var);
384 if (get_base_var(var) < 0 || var->len < 1)
17712991 385 break;
0971e992
BW
386 strbuf_addch(var, '.');
387 baselen = var->len;
17712991
LT
388 continue;
389 }
390 if (!isalpha(c))
391 break;
0971e992
BW
392 /*
393 * Truncate the var name back to the section header
394 * stem prior to grabbing the suffix part of the name
395 * and the value.
396 */
397 strbuf_setlen(var, baselen);
398 strbuf_addch(var, tolower(c));
399 if (get_value(fn, data, var) < 0)
17712991
LT
400 break;
401 }
924aaf3e 402 die("bad config file line %d in %s", cf->linenr, cf->name);
17712991
LT
403}
404
ebaa1bd4 405static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
406{
407 if (!*end)
408 return 1;
c8deb5a1
SP
409 else if (!strcasecmp(end, "k")) {
410 *val *= 1024;
411 return 1;
412 }
413 else if (!strcasecmp(end, "m")) {
414 *val *= 1024 * 1024;
415 return 1;
416 }
417 else if (!strcasecmp(end, "g")) {
418 *val *= 1024 * 1024 * 1024;
419 return 1;
420 }
421 return 0;
0b87b6e0
BD
422}
423
0433bcd9 424static int git_parse_long(const char *value, long *ret)
0b87b6e0
BD
425{
426 if (value && *value) {
427 char *end;
ebaa1bd4
NA
428 intmax_t val;
429 uintmax_t uval;
430 uintmax_t factor = 1;
431
432 errno = 0;
433 val = strtoimax(value, &end, 0);
434 if (errno == ERANGE)
435 return 0;
c8deb5a1
SP
436 if (!parse_unit_factor(end, &factor))
437 return 0;
ebaa1bd4
NA
438 uval = abs(val);
439 uval *= factor;
440 if ((uval > maximum_signed_value_of_type(long)) ||
441 (abs(val) > uval))
442 return 0;
443 val *= factor;
444 *ret = val;
0b87b6e0
BD
445 return 1;
446 }
447 return 0;
448}
449
450int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
451{
452 if (value && *value) {
453 char *end;
ebaa1bd4
NA
454 uintmax_t val;
455 uintmax_t oldval;
456
457 errno = 0;
458 val = strtoumax(value, &end, 0);
459 if (errno == ERANGE)
460 return 0;
461 oldval = val;
c8deb5a1
SP
462 if (!parse_unit_factor(end, &val))
463 return 0;
ebaa1bd4
NA
464 if ((val > maximum_unsigned_value_of_type(long)) ||
465 (oldval > val))
466 return 0;
c8deb5a1 467 *ret = val;
0b87b6e0 468 return 1;
17712991 469 }
0b87b6e0
BD
470 return 0;
471}
472
c1867cea
JK
473static void die_bad_config(const char *name)
474{
924aaf3e
RJ
475 if (cf && cf->name)
476 die("bad config value for '%s' in %s", name, cf->name);
c1867cea
JK
477 die("bad config value for '%s'", name);
478}
479
0b87b6e0
BD
480int git_config_int(const char *name, const char *value)
481{
0433bcd9 482 long ret = 0;
0b87b6e0 483 if (!git_parse_long(value, &ret))
c1867cea 484 die_bad_config(name);
0b87b6e0
BD
485 return ret;
486}
487
488unsigned long git_config_ulong(const char *name, const char *value)
489{
490 unsigned long ret;
491 if (!git_parse_ulong(value, &ret))
c1867cea 492 die_bad_config(name);
0b87b6e0 493 return ret;
17712991
LT
494}
495
b2be2f6a 496static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
497{
498 if (!value)
499 return 1;
500 if (!*value)
501 return 0;
8420ccd8
JH
502 if (!strcasecmp(value, "true")
503 || !strcasecmp(value, "yes")
504 || !strcasecmp(value, "on"))
17712991 505 return 1;
8420ccd8
JH
506 if (!strcasecmp(value, "false")
507 || !strcasecmp(value, "no")
508 || !strcasecmp(value, "off"))
17712991 509 return 0;
8420ccd8
JH
510 return -1;
511}
512
b2be2f6a
JK
513int git_config_maybe_bool(const char *name, const char *value)
514{
db6195ef 515 long v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
516 if (0 <= v)
517 return v;
db6195ef
JK
518 if (git_parse_long(value, &v))
519 return !!v;
b2be2f6a
JK
520 return -1;
521}
522
8420ccd8
JH
523int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
524{
b2be2f6a 525 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
526 if (0 <= v) {
527 *is_bool = 1;
528 return v;
529 }
a53f2ec6 530 *is_bool = 0;
c35b0b58 531 return git_config_int(name, value);
17712991
LT
532}
533
a53f2ec6
JH
534int git_config_bool(const char *name, const char *value)
535{
536 int discard;
c35b0b58 537 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
538}
539
ea5105a5
CC
540int git_config_string(const char **dest, const char *var, const char *value)
541{
542 if (!value)
543 return config_error_nonbool(var);
544 *dest = xstrdup(value);
545 return 0;
546}
547
395de250
MM
548int git_config_pathname(const char **dest, const char *var, const char *value)
549{
550 if (!value)
551 return config_error_nonbool(var);
552 *dest = expand_user_path(value);
553 if (!*dest)
554 die("Failed to expand user dir in: '%s'", value);
555 return 0;
556}
557
806e2ad7 558static int git_default_core_config(const char *var, const char *value)
17712991
LT
559{
560 /* This needs a better name */
561 if (!strcmp(var, "core.filemode")) {
562 trust_executable_bit = git_config_bool(var, value);
563 return 0;
564 }
1ce4790b
AR
565 if (!strcmp(var, "core.trustctime")) {
566 trust_ctime = git_config_bool(var, value);
567 return 0;
568 }
c08e4d5b
RR
569 if (!strcmp(var, "core.statinfo")) {
570 if (!strcasecmp(value, "default"))
571 check_stat = 1;
572 else if (!strcasecmp(value, "minimal"))
573 check_stat = 0;
574 }
17712991 575
9378c161
JH
576 if (!strcmp(var, "core.quotepath")) {
577 quote_path_fully = git_config_bool(var, value);
578 return 0;
579 }
580
78a8d641
JS
581 if (!strcmp(var, "core.symlinks")) {
582 has_symlinks = git_config_bool(var, value);
583 return 0;
584 }
585
0a9b88b7
LT
586 if (!strcmp(var, "core.ignorecase")) {
587 ignore_case = git_config_bool(var, value);
588 return 0;
589 }
590
64589a03
JH
591 if (!strcmp(var, "core.attributesfile"))
592 return git_config_pathname(&git_attributes_file, var, value);
593
7d1864ce
JH
594 if (!strcmp(var, "core.bare")) {
595 is_bare_repository_cfg = git_config_bool(var, value);
596 return 0;
597 }
598
5f73076c
JH
599 if (!strcmp(var, "core.ignorestat")) {
600 assume_unchanged = git_config_bool(var, value);
601 return 0;
602 }
603
e388c738
JH
604 if (!strcmp(var, "core.prefersymlinkrefs")) {
605 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
606 return 0;
607 }
608
6de08ae6
SP
609 if (!strcmp(var, "core.logallrefupdates")) {
610 log_all_ref_updates = git_config_bool(var, value);
611 return 0;
612 }
613
2f8acdb3
JH
614 if (!strcmp(var, "core.warnambiguousrefs")) {
615 warn_ambiguous_refs = git_config_bool(var, value);
616 return 0;
617 }
618
a71f09fe 619 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
620 int abbrev = git_config_int(var, value);
621 if (abbrev < minimum_abbrev || abbrev > 40)
622 return -1;
623 default_abbrev = abbrev;
624 return 0;
625 }
626
960ccca6 627 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
628 int level = git_config_int(var, value);
629 if (level == -1)
630 level = Z_DEFAULT_COMPRESSION;
631 else if (level < 0 || level > Z_BEST_COMPRESSION)
632 die("bad zlib compression level %d", level);
633 zlib_compression_level = level;
960ccca6
DH
634 zlib_compression_seen = 1;
635 return 0;
636 }
637
638 if (!strcmp(var, "core.compression")) {
639 int level = git_config_int(var, value);
640 if (level == -1)
641 level = Z_DEFAULT_COMPRESSION;
642 else if (level < 0 || level > Z_BEST_COMPRESSION)
643 die("bad zlib compression level %d", level);
644 core_compression_level = level;
645 core_compression_seen = 1;
646 if (!zlib_compression_seen)
647 zlib_compression_level = level;
12f6c308
JBH
648 return 0;
649 }
650
60bb8b14 651 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 652 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 653 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
654
655 /* This value must be multiple of (pagesize * 2) */
656 packed_git_window_size /= pgsz_x2;
657 if (packed_git_window_size < 1)
658 packed_git_window_size = 1;
659 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
660 return 0;
661 }
662
15366280 663 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 664 big_file_threshold = git_config_ulong(var, value);
15366280
JH
665 return 0;
666 }
667
77ccc5bb 668 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 669 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
670 return 0;
671 }
672
18bdec11 673 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 674 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
675 return 0;
676 }
677
5f44324d
JH
678 if (!strcmp(var, "core.logpackaccess"))
679 return git_config_string(&log_pack_access, var, value);
680
6c510bee 681 if (!strcmp(var, "core.autocrlf")) {
d7f46334 682 if (value && !strcasecmp(value, "input")) {
ec70f52f 683 if (core_eol == EOL_CRLF)
942e7747 684 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 685 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
686 return 0;
687 }
6c510bee
LT
688 auto_crlf = git_config_bool(var, value);
689 return 0;
690 }
691
21e5ad50
SP
692 if (!strcmp(var, "core.safecrlf")) {
693 if (value && !strcasecmp(value, "warn")) {
694 safe_crlf = SAFE_CRLF_WARN;
695 return 0;
696 }
697 safe_crlf = git_config_bool(var, value);
698 return 0;
699 }
700
942e7747
EB
701 if (!strcmp(var, "core.eol")) {
702 if (value && !strcasecmp(value, "lf"))
ec70f52f 703 core_eol = EOL_LF;
942e7747 704 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 705 core_eol = EOL_CRLF;
942e7747 706 else if (value && !strcasecmp(value, "native"))
ec70f52f 707 core_eol = EOL_NATIVE;
942e7747 708 else
ec70f52f
JH
709 core_eol = EOL_UNSET;
710 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
711 return error("core.autocrlf=input conflicts with core.eol=crlf");
712 return 0;
713 }
714
a97a7468
JS
715 if (!strcmp(var, "core.notesref")) {
716 notes_ref_name = xstrdup(value);
717 return 0;
718 }
719
806e2ad7
LT
720 if (!strcmp(var, "core.pager"))
721 return git_config_string(&pager_program, var, value);
722
723 if (!strcmp(var, "core.editor"))
724 return git_config_string(&editor_program, var, value);
725
eff80a9f
JH
726 if (!strcmp(var, "core.commentchar")) {
727 const char *comment;
728 int ret = git_config_string(&comment, var, value);
729 if (!ret)
730 comment_line_char = comment[0];
731 return ret;
732 }
733
d3e7da89
AK
734 if (!strcmp(var, "core.askpass"))
735 return git_config_string(&askpass_program, var, value);
736
806e2ad7 737 if (!strcmp(var, "core.excludesfile"))
395de250 738 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
739
740 if (!strcmp(var, "core.whitespace")) {
741 if (!value)
742 return config_error_nonbool(var);
743 whitespace_rule_cfg = parse_whitespace_rule(value);
744 return 0;
745 }
746
aafe9fba
LT
747 if (!strcmp(var, "core.fsyncobjectfiles")) {
748 fsync_object_files = git_config_bool(var, value);
749 return 0;
750 }
751
671c9b7e
LT
752 if (!strcmp(var, "core.preloadindex")) {
753 core_preload_index = git_config_bool(var, value);
754 return 0;
755 }
756
348df166
JS
757 if (!strcmp(var, "core.createobject")) {
758 if (!strcmp(value, "rename"))
759 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
760 else if (!strcmp(value, "link"))
761 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
762 else
763 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
764 return 0;
765 }
766
08aefc9e
NTND
767 if (!strcmp(var, "core.sparsecheckout")) {
768 core_apply_sparse_checkout = git_config_bool(var, value);
769 return 0;
770 }
771
76759c7d
TB
772 if (!strcmp(var, "core.precomposeunicode")) {
773 precomposed_unicode = git_config_bool(var, value);
774 return 0;
775 }
776
806e2ad7
LT
777 /* Add other config variables here and to Documentation/config.txt. */
778 return 0;
779}
780
1141f492 781static int git_default_i18n_config(const char *var, const char *value)
d1364529 782{
ea5105a5
CC
783 if (!strcmp(var, "i18n.commitencoding"))
784 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 785
ea5105a5
CC
786 if (!strcmp(var, "i18n.logoutputencoding"))
787 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 788
1141f492
LT
789 /* Add other config variables here and to Documentation/config.txt. */
790 return 0;
791}
039bc64e 792
1141f492
LT
793static int git_default_branch_config(const char *var, const char *value)
794{
9ed36cfa
JS
795 if (!strcmp(var, "branch.autosetupmerge")) {
796 if (value && !strcasecmp(value, "always")) {
797 git_branch_track = BRANCH_TRACK_ALWAYS;
798 return 0;
799 }
800 git_branch_track = git_config_bool(var, value);
801 return 0;
802 }
c998ae9b
DS
803 if (!strcmp(var, "branch.autosetuprebase")) {
804 if (!value)
805 return config_error_nonbool(var);
806 else if (!strcmp(value, "never"))
807 autorebase = AUTOREBASE_NEVER;
808 else if (!strcmp(value, "local"))
809 autorebase = AUTOREBASE_LOCAL;
810 else if (!strcmp(value, "remote"))
811 autorebase = AUTOREBASE_REMOTE;
812 else if (!strcmp(value, "always"))
813 autorebase = AUTOREBASE_ALWAYS;
814 else
815 return error("Malformed value for %s", var);
816 return 0;
817 }
a9cc857a 818
1ab661dd 819 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
820 return 0;
821}
822
52153747
FAG
823static int git_default_push_config(const char *var, const char *value)
824{
825 if (!strcmp(var, "push.default")) {
826 if (!value)
827 return config_error_nonbool(var);
828 else if (!strcmp(value, "nothing"))
829 push_default = PUSH_DEFAULT_NOTHING;
830 else if (!strcmp(value, "matching"))
831 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
832 else if (!strcmp(value, "simple"))
833 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
834 else if (!strcmp(value, "upstream"))
835 push_default = PUSH_DEFAULT_UPSTREAM;
836 else if (!strcmp(value, "tracking")) /* deprecated */
837 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
838 else if (!strcmp(value, "current"))
839 push_default = PUSH_DEFAULT_CURRENT;
840 else {
841 error("Malformed value for %s: %s", var, value);
b55e6775
MM
842 return error("Must be one of nothing, matching, simple, "
843 "upstream or current.");
52153747
FAG
844 }
845 return 0;
846 }
847
848 /* Add other config variables here and to Documentation/config.txt. */
849 return 0;
850}
851
d551a488
MSO
852static int git_default_mailmap_config(const char *var, const char *value)
853{
854 if (!strcmp(var, "mailmap.file"))
855 return git_config_string(&git_mailmap_file, var, value);
08610900
JK
856 if (!strcmp(var, "mailmap.blob"))
857 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
858
859 /* Add other config variables here and to Documentation/config.txt. */
860 return 0;
861}
862
1141f492
LT
863int git_default_config(const char *var, const char *value, void *dummy)
864{
865 if (!prefixcmp(var, "core."))
866 return git_default_core_config(var, value);
867
868 if (!prefixcmp(var, "user."))
9597921b 869 return git_ident_config(var, value, dummy);
1141f492
LT
870
871 if (!prefixcmp(var, "i18n."))
872 return git_default_i18n_config(var, value);
873
874 if (!prefixcmp(var, "branch."))
875 return git_default_branch_config(var, value);
876
52153747
FAG
877 if (!prefixcmp(var, "push."))
878 return git_default_push_config(var, value);
879
d551a488
MSO
880 if (!prefixcmp(var, "mailmap."))
881 return git_default_mailmap_config(var, value);
882
75194438
JK
883 if (!prefixcmp(var, "advice."))
884 return git_default_advice_config(var, value);
885
1141f492
LT
886 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
887 pager_use_color = git_config_bool(var,value);
888 return 0;
889 }
890
568508e7
JH
891 if (!strcmp(var, "pack.packsizelimit")) {
892 pack_size_limit_cfg = git_config_ulong(var, value);
893 return 0;
894 }
1141f492
LT
895 /* Add other config variables here and to Documentation/config.txt. */
896 return 0;
897}
898
ca4b5de2
HV
899/*
900 * The fields f and name of top need to be initialized before calling
901 * this function.
902 */
903static int do_config_from(struct config_file *top, config_fn_t fn, void *data)
904{
905 int ret;
906
907 /* push config-file parsing state stack */
908 top->prev = cf;
909 top->linenr = 1;
910 top->eof = 0;
911 strbuf_init(&top->value, 1024);
912 strbuf_init(&top->var, 1024);
913 cf = top;
914
915 ret = git_parse_file(fn, data);
916
917 /* pop config-file parsing state stack */
918 strbuf_release(&top->value);
919 strbuf_release(&top->var);
920 cf = top->prev;
921
922 return ret;
923}
924
ef90d6d4 925int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
926{
927 int ret;
4f629539 928 FILE *f = fopen(filename, "r");
17712991
LT
929
930 ret = -1;
931 if (f) {
924aaf3e
RJ
932 config_file top;
933
924aaf3e
RJ
934 top.f = f;
935 top.name = filename;
ca4b5de2
HV
936
937 ret = do_config_from(&top, fn, data);
924aaf3e 938
17712991
LT
939 fclose(f);
940 }
941 return ret;
942}
10bea152 943
506b17b1
JS
944const char *git_etc_gitconfig(void)
945{
7f0e39fa 946 static const char *system_wide;
2de9de5e
SP
947 if (!system_wide)
948 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 949 return system_wide;
506b17b1
JS
950}
951
0ef37164 952int git_env_bool(const char *k, int def)
ab88c363
JK
953{
954 const char *v = getenv(k);
955 return v ? git_config_bool(k, v) : def;
956}
957
958int git_config_system(void)
959{
960 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
961}
962
dbdf5854 963int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 964{
aa387407 965 int ret = 0, found = 0;
21cf3227
HKNN
966 char *xdg_config = NULL;
967 char *user_config = NULL;
968
969 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 970
8f2bbe45 971 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK)) {
dc871831
DB
972 ret += git_config_from_file(fn, git_etc_gitconfig(),
973 data);
aa387407
FC
974 found += 1;
975 }
5f1a63e0 976
96b9e0e3 977 if (xdg_config && !access_or_die(xdg_config, R_OK)) {
21cf3227
HKNN
978 ret += git_config_from_file(fn, xdg_config, data);
979 found += 1;
980 }
981
96b9e0e3 982 if (user_config && !access_or_die(user_config, R_OK)) {
21cf3227
HKNN
983 ret += git_config_from_file(fn, user_config, data);
984 found += 1;
5f1a63e0
JS
985 }
986
8f2bbe45 987 if (repo_config && !access_or_die(repo_config, R_OK)) {
aa387407
FC
988 ret += git_config_from_file(fn, repo_config, data);
989 found += 1;
990 }
8b1fa778 991
5a0c9eeb
JK
992 switch (git_config_from_parameters(fn, data)) {
993 case -1: /* error */
1c2c9bee 994 die("unable to parse command-line config");
5a0c9eeb
JK
995 break;
996 case 0: /* found nothing */
997 break;
998 default: /* found at least one item */
999 found++;
1000 break;
1001 }
8b1fa778 1002
21cf3227
HKNN
1003 free(xdg_config);
1004 free(user_config);
1f2baa78 1005 return ret == 0 ? found : ret;
4f629539
JH
1006}
1007
c9b5e2a5 1008int git_config_with_options(config_fn_t fn, void *data,
9b25a0b5 1009 const char *filename, int respect_includes)
dbdf5854
NTND
1010{
1011 char *repo_config = NULL;
1012 int ret;
9b25a0b5
JK
1013 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1014
1015 if (respect_includes) {
1016 inc.fn = fn;
1017 inc.data = data;
1018 fn = git_config_include;
1019 data = &inc;
1020 }
dbdf5854 1021
c9b5e2a5
JK
1022 /*
1023 * If we have a specific filename, use it. Otherwise, follow the
1024 * regular lookup sequence.
1025 */
1026 if (filename)
1027 return git_config_from_file(fn, filename, data);
1028
dbdf5854
NTND
1029 repo_config = git_pathdup("config");
1030 ret = git_config_early(fn, data, repo_config);
1031 if (repo_config)
1032 free(repo_config);
1033 return ret;
1034}
1035
c9b5e2a5
JK
1036int git_config(config_fn_t fn, void *data)
1037{
9b25a0b5 1038 return git_config_with_options(fn, data, NULL, 1);
c9b5e2a5
JK
1039}
1040
10bea152
JS
1041/*
1042 * Find all the stuff for git_config_set() below.
1043 */
4ddba79d
JS
1044
1045#define MAX_MATCHES 512
1046
10bea152
JS
1047static struct {
1048 int baselen;
4b25d091 1049 char *key;
f98d863d 1050 int do_not_match;
4b25d091 1051 regex_t *value_regex;
4ddba79d 1052 int multi_replace;
dc49cd76 1053 size_t offset[MAX_MATCHES];
10bea152
JS
1054 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1055 int seen;
1056} store;
1057
4b25d091 1058static int matches(const char *key, const char *value)
f98d863d
JS
1059{
1060 return !strcmp(key, store.key) &&
1061 (store.value_regex == NULL ||
1062 (store.do_not_match ^
1063 !regexec(store.value_regex, value, 0, NULL, 0)));
1064}
1065
4b25d091 1066static int store_aux(const char *key, const char *value, void *cb)
10bea152 1067{
ae9ee41d
JH
1068 const char *ep;
1069 size_t section_len;
924aaf3e 1070 FILE *f = cf->f;
ae9ee41d 1071
10bea152
JS
1072 switch (store.state) {
1073 case KEY_SEEN:
f98d863d 1074 if (matches(key, value)) {
4ddba79d 1075 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1076 warning("%s has multiple values", key);
4ddba79d 1077 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 1078 error("too many matches for %s", key);
4ddba79d 1079 return 1;
10bea152 1080 }
4ddba79d 1081
924aaf3e 1082 store.offset[store.seen] = ftell(f);
10bea152
JS
1083 store.seen++;
1084 }
1085 break;
1086 case SECTION_SEEN:
ae9ee41d
JH
1087 /*
1088 * What we are looking for is in store.key (both
1089 * section and var), and its section part is baselen
1090 * long. We found key (again, both section and var).
1091 * We would want to know if this key is in the same
1092 * section as what we are looking for. We already
1093 * know we are in the same section as what should
1094 * hold store.key.
1095 */
1096 ep = strrchr(key, '.');
1097 section_len = ep - key;
1098
1099 if ((section_len != store.baselen) ||
1100 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1101 store.state = SECTION_END_SEEN;
1102 break;
ae9ee41d
JH
1103 }
1104
1105 /*
1106 * Do not increment matches: this is no match, but we
1107 * just made sure we are in the desired section.
1108 */
924aaf3e 1109 store.offset[store.seen] = ftell(f);
10bea152
JS
1110 /* fallthru */
1111 case SECTION_END_SEEN:
1112 case START:
f98d863d 1113 if (matches(key, value)) {
924aaf3e 1114 store.offset[store.seen] = ftell(f);
10bea152
JS
1115 store.state = KEY_SEEN;
1116 store.seen++;
d14f7764
LT
1117 } else {
1118 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1119 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1120 store.state = SECTION_SEEN;
924aaf3e 1121 store.offset[store.seen] = ftell(f);
d14f7764 1122 }
bdf0ef08 1123 }
10bea152
JS
1124 }
1125 return 0;
1126}
1127
64c0d71c 1128static int write_error(const char *filename)
480c9e52 1129{
64c0d71c 1130 error("failed to write new configuration file %s", filename);
480c9e52
AW
1131
1132 /* Same error code as "failed to rename". */
1133 return 4;
1134}
1135
4b25d091 1136static int store_write_section(int fd, const char *key)
10bea152 1137{
cb891a59
KH
1138 const char *dot;
1139 int i, success;
f285a2d7 1140 struct strbuf sb = STRBUF_INIT;
d14f7764 1141
cb891a59 1142 dot = memchr(key, '.', store.baselen);
d14f7764 1143 if (dot) {
cb891a59
KH
1144 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1145 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1146 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1147 strbuf_addch(&sb, '\\');
1148 strbuf_addch(&sb, key[i]);
d14f7764 1149 }
cb891a59
KH
1150 strbuf_addstr(&sb, "\"]\n");
1151 } else {
1152 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1153 }
1154
cb891a59
KH
1155 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1156 strbuf_release(&sb);
480c9e52 1157
cb891a59 1158 return success;
10bea152
JS
1159}
1160
4b25d091 1161static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1162{
cb891a59
KH
1163 int i, success;
1164 int length = strlen(key + store.baselen + 1);
1165 const char *quote = "";
f285a2d7 1166 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1167
6281f394
JM
1168 /*
1169 * Check to see if the value needs to be surrounded with a dq pair.
1170 * Note that problematic characters are always backslash-quoted; this
1171 * check is about not losing leading or trailing SP and strings that
1172 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1173 * configuration parser.
1174 */
cdd4fb15 1175 if (value[0] == ' ')
cb891a59 1176 quote = "\"";
cdd4fb15
BG
1177 for (i = 0; value[i]; i++)
1178 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1179 quote = "\"";
1180 if (i && value[i - 1] == ' ')
1181 quote = "\"";
1182
cb891a59
KH
1183 strbuf_addf(&sb, "\t%.*s = %s",
1184 length, key + store.baselen + 1, quote);
10bea152 1185
10bea152
JS
1186 for (i = 0; value[i]; i++)
1187 switch (value[i]) {
480c9e52 1188 case '\n':
cb891a59 1189 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1190 break;
1191 case '\t':
cb891a59 1192 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1193 break;
1194 case '"':
1195 case '\\':
cb891a59 1196 strbuf_addch(&sb, '\\');
480c9e52 1197 default:
cb891a59 1198 strbuf_addch(&sb, value[i]);
480c9e52
AW
1199 break;
1200 }
cb891a59
KH
1201 strbuf_addf(&sb, "%s\n", quote);
1202
1203 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1204 strbuf_release(&sb);
1205
1206 return success;
10bea152
JS
1207}
1208
4b25d091
FC
1209static ssize_t find_beginning_of_line(const char *contents, size_t size,
1210 size_t offset_, int *found_bracket)
4ddba79d 1211{
dc49cd76
SP
1212 size_t equal_offset = size, bracket_offset = size;
1213 ssize_t offset;
4ddba79d 1214
7a31cc0f 1215contline:
a6080a0a 1216 for (offset = offset_-2; offset > 0
4ddba79d
JS
1217 && contents[offset] != '\n'; offset--)
1218 switch (contents[offset]) {
1219 case '=': equal_offset = offset; break;
1220 case ']': bracket_offset = offset; break;
1221 }
7a31cc0f
FL
1222 if (offset > 0 && contents[offset-1] == '\\') {
1223 offset_ = offset;
1224 goto contline;
1225 }
4ddba79d
JS
1226 if (bracket_offset < equal_offset) {
1227 *found_bracket = 1;
1228 offset = bracket_offset+1;
1229 } else
1230 offset++;
1231
1232 return offset;
1233}
1234
5ec31182
RR
1235int git_config_set_in_file(const char *config_filename,
1236 const char *key, const char *value)
1237{
1238 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1239}
1240
4b25d091 1241int git_config_set(const char *key, const char *value)
10bea152 1242{
4ddba79d 1243 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1244}
1245
b09c53a3
LP
1246/*
1247 * Auxiliary function to sanity-check and split the key into the section
1248 * identifier and variable name.
1249 *
1250 * Returns 0 on success, -1 when there is an invalid character in the key and
1251 * -2 if there is no section name in the key.
1252 *
1253 * store_key - pointer to char* which will hold a copy of the key with
1254 * lowercase section and variable name
1255 * baselen - pointer to int which will hold the length of the
1256 * section + subsection part, can be NULL
1257 */
1258int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1259{
1260 int i, dot, baselen;
1261 const char *last_dot = strrchr(key, '.');
1262
1263 /*
1264 * Since "key" actually contains the section name and the real
1265 * key name separated by a dot, we have to know where the dot is.
1266 */
1267
2169ddc0 1268 if (last_dot == NULL || last_dot == key) {
b09c53a3 1269 error("key does not contain a section: %s", key);
7a397419 1270 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1271 }
1272
2169ddc0
LP
1273 if (!last_dot[1]) {
1274 error("key does not contain variable name: %s", key);
7a397419 1275 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1276 }
1277
b09c53a3
LP
1278 baselen = last_dot - key;
1279 if (baselen_)
1280 *baselen_ = baselen;
1281
1282 /*
1283 * Validate the key and while at it, lower case it for matching.
1284 */
1285 *store_key = xmalloc(strlen(key) + 1);
1286
1287 dot = 0;
1288 for (i = 0; key[i]; i++) {
1289 unsigned char c = key[i];
1290 if (c == '.')
1291 dot = 1;
1292 /* Leave the extended basename untouched.. */
1293 if (!dot || i > baselen) {
1294 if (!iskeychar(c) ||
1295 (i == baselen + 1 && !isalpha(c))) {
1296 error("invalid key: %s", key);
1297 goto out_free_ret_1;
1298 }
1299 c = tolower(c);
1300 } else if (c == '\n') {
1301 error("invalid key (newline): %s", key);
1302 goto out_free_ret_1;
1303 }
1304 (*store_key)[i] = c;
1305 }
1306 (*store_key)[i] = 0;
1307
1308 return 0;
1309
1310out_free_ret_1:
1311 free(*store_key);
97ed50f9 1312 *store_key = NULL;
7a397419 1313 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1314}
1315
10bea152
JS
1316/*
1317 * If value==NULL, unset in (remove from) config,
1318 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1319 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1320 * else all matching key/values (regardless how many) are removed,
1321 * before the new pair is written.
10bea152
JS
1322 *
1323 * Returns 0 on success.
1324 *
1325 * This function does this:
1326 *
1327 * - it locks the config file by creating ".git/config.lock"
1328 *
1329 * - it then parses the config using store_aux() as validator to find
1330 * the position on the key/value pair to replace. If it is to be unset,
1331 * it must be found exactly once.
1332 *
1333 * - the config file is mmap()ed and the part before the match (if any) is
1334 * written to the lock file, then the changed part and the rest.
1335 *
1336 * - the config file is removed and the lock file rename()d to it.
1337 *
1338 */
5ec31182
RR
1339int git_config_set_multivar_in_file(const char *config_filename,
1340 const char *key, const char *value,
1341 const char *value_regex, int multi_replace)
10bea152 1342{
f8ba655e 1343 int fd = -1, in_fd;
dafc88b1 1344 int ret;
6cbf973c 1345 struct lock_file *lock = NULL;
0a5f5759 1346 char *filename_buf = NULL;
4ddba79d 1347
b09c53a3
LP
1348 /* parse-key returns negative; flip the sign to feed exit(3) */
1349 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1350 if (ret)
dafc88b1 1351 goto out_free;
b17e659d
JS
1352
1353 store.multi_replace = multi_replace;
10bea152 1354
0a5f5759
JK
1355 if (!config_filename)
1356 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1357
1358 /*
6cbf973c 1359 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1360 * contents of .git/config will be written into it.
1361 */
6cbf973c
BS
1362 lock = xcalloc(sizeof(struct lock_file), 1);
1363 fd = hold_lock_file_for_update(lock, config_filename, 0);
1364 if (fd < 0) {
6ffd567b 1365 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1366 free(store.key);
7a397419 1367 ret = CONFIG_NO_LOCK;
dafc88b1 1368 goto out_free;
10bea152
JS
1369 }
1370
1371 /*
1372 * If .git/config does not exist yet, write a minimal version.
1373 */
88fb958b
AR
1374 in_fd = open(config_filename, O_RDONLY);
1375 if ( in_fd < 0 ) {
10bea152
JS
1376 free(store.key);
1377
88fb958b
AR
1378 if ( ENOENT != errno ) {
1379 error("opening %s: %s", config_filename,
1380 strerror(errno));
7a397419 1381 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1382 goto out_free;
88fb958b 1383 }
10bea152
JS
1384 /* if nothing to unset, error out */
1385 if (value == NULL) {
7a397419 1386 ret = CONFIG_NOTHING_SET;
dafc88b1 1387 goto out_free;
10bea152
JS
1388 }
1389
4b25d091 1390 store.key = (char *)key;
480c9e52 1391 if (!store_write_section(fd, key) ||
93c1e079
JH
1392 !store_write_pair(fd, key, value))
1393 goto write_err_out;
1394 } else {
88fb958b 1395 struct stat st;
4b25d091 1396 char *contents;
dc49cd76
SP
1397 size_t contents_sz, copy_begin, copy_end;
1398 int i, new_line = 0;
10bea152
JS
1399
1400 if (value_regex == NULL)
1401 store.value_regex = NULL;
1402 else {
f98d863d
JS
1403 if (value_regex[0] == '!') {
1404 store.do_not_match = 1;
1405 value_regex++;
1406 } else
1407 store.do_not_match = 0;
1408
2d7320d0 1409 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1410 if (regcomp(store.value_regex, value_regex,
1411 REG_EXTENDED)) {
64c0d71c 1412 error("invalid pattern: %s", value_regex);
10bea152 1413 free(store.value_regex);
7a397419 1414 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1415 goto out_free;
10bea152
JS
1416 }
1417 }
1418
4ddba79d 1419 store.offset[0] = 0;
10bea152
JS
1420 store.state = START;
1421 store.seen = 0;
1422
1423 /*
1424 * After this, store.offset will contain the *end* offset
1425 * of the last match, or remain at 0 if no match was found.
1426 * As a side effect, we make sure to transform only a valid
1427 * existing config file.
1428 */
ef90d6d4 1429 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1430 error("invalid config file %s", config_filename);
10bea152
JS
1431 free(store.key);
1432 if (store.value_regex != NULL) {
1433 regfree(store.value_regex);
1434 free(store.value_regex);
1435 }
7a397419 1436 ret = CONFIG_INVALID_FILE;
dafc88b1 1437 goto out_free;
10bea152
JS
1438 }
1439
1440 free(store.key);
1441 if (store.value_regex != NULL) {
1442 regfree(store.value_regex);
1443 free(store.value_regex);
1444 }
1445
4ddba79d
JS
1446 /* if nothing to unset, or too many matches, error out */
1447 if ((store.seen == 0 && value == NULL) ||
1448 (store.seen > 1 && multi_replace == 0)) {
7a397419 1449 ret = CONFIG_NOTHING_SET;
dafc88b1 1450 goto out_free;
10bea152
JS
1451 }
1452
88fb958b 1453 fstat(in_fd, &st);
dc49cd76
SP
1454 contents_sz = xsize_t(st.st_size);
1455 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1456 MAP_PRIVATE, in_fd, 0);
1457 close(in_fd);
1458
4ddba79d
JS
1459 if (store.seen == 0)
1460 store.seen = 1;
1461
1462 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1463 if (store.offset[i] == 0) {
dc49cd76 1464 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1465 } else if (store.state != KEY_SEEN) {
1466 copy_end = store.offset[i];
10bea152 1467 } else
4ddba79d 1468 copy_end = find_beginning_of_line(
dc49cd76 1469 contents, contents_sz,
4ddba79d
JS
1470 store.offset[i]-2, &new_line);
1471
02e5ba4a
JK
1472 if (copy_end > 0 && contents[copy_end-1] != '\n')
1473 new_line = 1;
1474
4ddba79d
JS
1475 /* write the first part of the config */
1476 if (copy_end > copy_begin) {
93c1e079
JH
1477 if (write_in_full(fd, contents + copy_begin,
1478 copy_end - copy_begin) <
1479 copy_end - copy_begin)
1480 goto write_err_out;
1481 if (new_line &&
2b7ca830 1482 write_str_in_full(fd, "\n") != 1)
93c1e079 1483 goto write_err_out;
4ddba79d
JS
1484 }
1485 copy_begin = store.offset[i];
10bea152
JS
1486 }
1487
10bea152
JS
1488 /* write the pair (value == NULL means unset) */
1489 if (value != NULL) {
93c1e079
JH
1490 if (store.state == START) {
1491 if (!store_write_section(fd, key))
1492 goto write_err_out;
480c9e52 1493 }
93c1e079
JH
1494 if (!store_write_pair(fd, key, value))
1495 goto write_err_out;
10bea152
JS
1496 }
1497
1498 /* write the rest of the config */
dc49cd76 1499 if (copy_begin < contents_sz)
93c1e079 1500 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1501 contents_sz - copy_begin) <
1502 contents_sz - copy_begin)
93c1e079 1503 goto write_err_out;
10bea152 1504
dc49cd76 1505 munmap(contents, contents_sz);
10bea152
JS
1506 }
1507
4ed7cd3a 1508 if (commit_lock_file(lock) < 0) {
64c0d71c 1509 error("could not commit config file %s", config_filename);
7a397419 1510 ret = CONFIG_NO_WRITE;
dafc88b1 1511 goto out_free;
10bea152
JS
1512 }
1513
6cbf973c
BS
1514 /*
1515 * lock is committed, so don't try to roll it back below.
1516 * NOTE: Since lockfile.c keeps a linked list of all created
1517 * lock_file structures, it isn't safe to free(lock). It's
1518 * better to just leave it hanging around.
1519 */
1520 lock = NULL;
dafc88b1
SH
1521 ret = 0;
1522
1523out_free:
6cbf973c
BS
1524 if (lock)
1525 rollback_lock_file(lock);
0a5f5759 1526 free(filename_buf);
dafc88b1 1527 return ret;
93c1e079
JH
1528
1529write_err_out:
64c0d71c 1530 ret = write_error(lock->filename);
93c1e079
JH
1531 goto out_free;
1532
10bea152
JS
1533}
1534
5ec31182
RR
1535int git_config_set_multivar(const char *key, const char *value,
1536 const char *value_regex, int multi_replace)
1537{
4a7bb5ba 1538 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1539 multi_replace);
5ec31182
RR
1540}
1541
118f8b24
PB
1542static int section_name_match (const char *buf, const char *name)
1543{
1544 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1545 if (buf[i] != '[')
1546 return 0;
1547 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1548 if (!dot && isspace(buf[i])) {
1549 dot = 1;
1550 if (name[j++] != '.')
1551 break;
1552 for (i++; isspace(buf[i]); i++)
1553 ; /* do nothing */
1554 if (buf[i] != '"')
1555 break;
1556 continue;
1557 }
1558 if (buf[i] == '\\' && dot)
1559 i++;
1560 else if (buf[i] == '"' && dot) {
1561 for (i++; isspace(buf[i]); i++)
1562 ; /* do_nothing */
1563 break;
1564 }
1565 if (buf[i] != name[j++])
1566 break;
1567 }
a4c0d463
AV
1568 if (buf[i] == ']' && name[j] == 0) {
1569 /*
1570 * We match, now just find the right length offset by
1571 * gobbling up any whitespace after it, as well
1572 */
1573 i++;
1574 for (; buf[i] && isspace(buf[i]); i++)
1575 ; /* do nothing */
1576 return i;
1577 }
1578 return 0;
118f8b24
PB
1579}
1580
94a35b1a
JK
1581static int section_name_is_ok(const char *name)
1582{
1583 /* Empty section names are bogus. */
1584 if (!*name)
1585 return 0;
1586
1587 /*
1588 * Before a dot, we must be alphanumeric or dash. After the first dot,
1589 * anything goes, so we can stop checking.
1590 */
1591 for (; *name && *name != '.'; name++)
1592 if (*name != '-' && !isalnum(*name))
1593 return 0;
1594 return 1;
1595}
1596
118f8b24 1597/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1598int git_config_rename_section_in_file(const char *config_filename,
1599 const char *old_name, const char *new_name)
0667fcfb 1600{
118f8b24 1601 int ret = 0, remove = 0;
42bd39b5 1602 char *filename_buf = NULL;
94a35b1a 1603 struct lock_file *lock;
0667fcfb
JS
1604 int out_fd;
1605 char buf[1024];
924aaf3e 1606 FILE *config_file;
0667fcfb 1607
94a35b1a
JK
1608 if (new_name && !section_name_is_ok(new_name)) {
1609 ret = error("invalid section name: %s", new_name);
1610 goto out;
1611 }
1612
42bd39b5
JK
1613 if (!config_filename)
1614 config_filename = filename_buf = git_pathdup("config");
1615
94a35b1a 1616 lock = xcalloc(sizeof(struct lock_file), 1);
0667fcfb 1617 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1618 if (out_fd < 0) {
64c0d71c 1619 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1620 goto out;
1621 }
0667fcfb 1622
fc1905bb 1623 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1624 /* no config file means nothing to rename, no error */
1625 goto unlock_and_out;
fc1905bb 1626 }
0667fcfb
JS
1627
1628 while (fgets(buf, sizeof(buf), config_file)) {
1629 int i;
480c9e52 1630 int length;
9a5abfc7 1631 char *output = buf;
0667fcfb
JS
1632 for (i = 0; buf[i] && isspace(buf[i]); i++)
1633 ; /* do nothing */
1634 if (buf[i] == '[') {
1635 /* it's a section */
a4c0d463
AV
1636 int offset = section_name_match(&buf[i], old_name);
1637 if (offset > 0) {
118f8b24
PB
1638 ret++;
1639 if (new_name == NULL) {
1640 remove = 1;
0667fcfb
JS
1641 continue;
1642 }
0667fcfb 1643 store.baselen = strlen(new_name);
480c9e52 1644 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1645 ret = write_error(lock->filename);
480c9e52
AW
1646 goto out;
1647 }
9a5abfc7
AV
1648 /*
1649 * We wrote out the new section, with
1650 * a newline, now skip the old
1651 * section's length
1652 */
1653 output += offset + i;
1654 if (strlen(output) > 0) {
1655 /*
1656 * More content means there's
1657 * a declaration to put on the
1658 * next line; indent with a
1659 * tab
1660 */
1661 output -= 1;
1662 output[0] = '\t';
1663 }
0667fcfb 1664 }
118f8b24 1665 remove = 0;
0667fcfb 1666 }
118f8b24
PB
1667 if (remove)
1668 continue;
9a5abfc7
AV
1669 length = strlen(output);
1670 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1671 ret = write_error(lock->filename);
480c9e52
AW
1672 goto out;
1673 }
0667fcfb 1674 }
fc1905bb 1675 fclose(config_file);
8b590075 1676unlock_and_out:
4ed7cd3a 1677 if (commit_lock_file(lock) < 0)
64c0d71c 1678 ret = error("could not commit config file %s", config_filename);
8b590075 1679out:
42bd39b5 1680 free(filename_buf);
0667fcfb
JS
1681 return ret;
1682}
40ea4ed9 1683
42bd39b5
JK
1684int git_config_rename_section(const char *old_name, const char *new_name)
1685{
4a7bb5ba 1686 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1687}
1688
40ea4ed9
JH
1689/*
1690 * Call this to report error for your variable that should not
1691 * get a boolean value (i.e. "[my] var" means "true").
1692 */
a469a101 1693#undef config_error_nonbool
40ea4ed9
JH
1694int config_error_nonbool(const char *var)
1695{
1696 return error("Missing value for '%s'", var);
1697}
1b86bbb0
JK
1698
1699int parse_config_key(const char *var,
1700 const char *section,
1701 const char **subsection, int *subsection_len,
1702 const char **key)
1703{
1704 int section_len = strlen(section);
1705 const char *dot;
1706
1707 /* Does it start with "section." ? */
1708 if (prefixcmp(var, section) || var[section_len] != '.')
1709 return -1;
1710
1711 /*
1712 * Find the key; we don't know yet if we have a subsection, but we must
1713 * parse backwards from the end, since the subsection may have dots in
1714 * it, too.
1715 */
1716 dot = strrchr(var, '.');
1717 *key = dot + 1;
1718
1719 /* Did we have a subsection at all? */
1720 if (dot == var + section_len) {
1721 *subsection = NULL;
1722 *subsection_len = 0;
1723 }
1724 else {
1725 *subsection = var + section_len + 1;
1726 *subsection_len = dot - *subsection;
1727 }
1728
1729 return 0;
1730}