Update draft release notes to 1.8.2
[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 }
17712991 569
9378c161
JH
570 if (!strcmp(var, "core.quotepath")) {
571 quote_path_fully = git_config_bool(var, value);
572 return 0;
573 }
574
78a8d641
JS
575 if (!strcmp(var, "core.symlinks")) {
576 has_symlinks = git_config_bool(var, value);
577 return 0;
578 }
579
0a9b88b7
LT
580 if (!strcmp(var, "core.ignorecase")) {
581 ignore_case = git_config_bool(var, value);
582 return 0;
583 }
584
64589a03
JH
585 if (!strcmp(var, "core.attributesfile"))
586 return git_config_pathname(&git_attributes_file, var, value);
587
7d1864ce
JH
588 if (!strcmp(var, "core.bare")) {
589 is_bare_repository_cfg = git_config_bool(var, value);
590 return 0;
591 }
592
5f73076c
JH
593 if (!strcmp(var, "core.ignorestat")) {
594 assume_unchanged = git_config_bool(var, value);
595 return 0;
596 }
597
e388c738
JH
598 if (!strcmp(var, "core.prefersymlinkrefs")) {
599 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
600 return 0;
601 }
602
6de08ae6
SP
603 if (!strcmp(var, "core.logallrefupdates")) {
604 log_all_ref_updates = git_config_bool(var, value);
605 return 0;
606 }
607
2f8acdb3
JH
608 if (!strcmp(var, "core.warnambiguousrefs")) {
609 warn_ambiguous_refs = git_config_bool(var, value);
610 return 0;
611 }
612
a71f09fe 613 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
614 int abbrev = git_config_int(var, value);
615 if (abbrev < minimum_abbrev || abbrev > 40)
616 return -1;
617 default_abbrev = abbrev;
618 return 0;
619 }
620
960ccca6 621 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
622 int level = git_config_int(var, value);
623 if (level == -1)
624 level = Z_DEFAULT_COMPRESSION;
625 else if (level < 0 || level > Z_BEST_COMPRESSION)
626 die("bad zlib compression level %d", level);
627 zlib_compression_level = level;
960ccca6
DH
628 zlib_compression_seen = 1;
629 return 0;
630 }
631
632 if (!strcmp(var, "core.compression")) {
633 int level = git_config_int(var, value);
634 if (level == -1)
635 level = Z_DEFAULT_COMPRESSION;
636 else if (level < 0 || level > Z_BEST_COMPRESSION)
637 die("bad zlib compression level %d", level);
638 core_compression_level = level;
639 core_compression_seen = 1;
640 if (!zlib_compression_seen)
641 zlib_compression_level = level;
12f6c308
JBH
642 return 0;
643 }
644
60bb8b14 645 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 646 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 647 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
648
649 /* This value must be multiple of (pagesize * 2) */
650 packed_git_window_size /= pgsz_x2;
651 if (packed_git_window_size < 1)
652 packed_git_window_size = 1;
653 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
654 return 0;
655 }
656
15366280 657 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 658 big_file_threshold = git_config_ulong(var, value);
15366280
JH
659 return 0;
660 }
661
77ccc5bb 662 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 663 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
664 return 0;
665 }
666
18bdec11 667 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 668 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
669 return 0;
670 }
671
5f44324d
JH
672 if (!strcmp(var, "core.logpackaccess"))
673 return git_config_string(&log_pack_access, var, value);
674
6c510bee 675 if (!strcmp(var, "core.autocrlf")) {
d7f46334 676 if (value && !strcasecmp(value, "input")) {
ec70f52f 677 if (core_eol == EOL_CRLF)
942e7747 678 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 679 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
680 return 0;
681 }
6c510bee
LT
682 auto_crlf = git_config_bool(var, value);
683 return 0;
684 }
685
21e5ad50
SP
686 if (!strcmp(var, "core.safecrlf")) {
687 if (value && !strcasecmp(value, "warn")) {
688 safe_crlf = SAFE_CRLF_WARN;
689 return 0;
690 }
691 safe_crlf = git_config_bool(var, value);
692 return 0;
693 }
694
942e7747
EB
695 if (!strcmp(var, "core.eol")) {
696 if (value && !strcasecmp(value, "lf"))
ec70f52f 697 core_eol = EOL_LF;
942e7747 698 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 699 core_eol = EOL_CRLF;
942e7747 700 else if (value && !strcasecmp(value, "native"))
ec70f52f 701 core_eol = EOL_NATIVE;
942e7747 702 else
ec70f52f
JH
703 core_eol = EOL_UNSET;
704 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
705 return error("core.autocrlf=input conflicts with core.eol=crlf");
706 return 0;
707 }
708
a97a7468
JS
709 if (!strcmp(var, "core.notesref")) {
710 notes_ref_name = xstrdup(value);
711 return 0;
712 }
713
806e2ad7
LT
714 if (!strcmp(var, "core.pager"))
715 return git_config_string(&pager_program, var, value);
716
717 if (!strcmp(var, "core.editor"))
718 return git_config_string(&editor_program, var, value);
719
d3e7da89
AK
720 if (!strcmp(var, "core.askpass"))
721 return git_config_string(&askpass_program, var, value);
722
806e2ad7 723 if (!strcmp(var, "core.excludesfile"))
395de250 724 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
725
726 if (!strcmp(var, "core.whitespace")) {
727 if (!value)
728 return config_error_nonbool(var);
729 whitespace_rule_cfg = parse_whitespace_rule(value);
730 return 0;
731 }
732
aafe9fba
LT
733 if (!strcmp(var, "core.fsyncobjectfiles")) {
734 fsync_object_files = git_config_bool(var, value);
735 return 0;
736 }
737
671c9b7e
LT
738 if (!strcmp(var, "core.preloadindex")) {
739 core_preload_index = git_config_bool(var, value);
740 return 0;
741 }
742
348df166
JS
743 if (!strcmp(var, "core.createobject")) {
744 if (!strcmp(value, "rename"))
745 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
746 else if (!strcmp(value, "link"))
747 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
748 else
749 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
750 return 0;
751 }
752
08aefc9e
NTND
753 if (!strcmp(var, "core.sparsecheckout")) {
754 core_apply_sparse_checkout = git_config_bool(var, value);
755 return 0;
756 }
757
76759c7d
TB
758 if (!strcmp(var, "core.precomposeunicode")) {
759 precomposed_unicode = git_config_bool(var, value);
760 return 0;
761 }
762
806e2ad7
LT
763 /* Add other config variables here and to Documentation/config.txt. */
764 return 0;
765}
766
1141f492 767static int git_default_i18n_config(const char *var, const char *value)
d1364529 768{
ea5105a5
CC
769 if (!strcmp(var, "i18n.commitencoding"))
770 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 771
ea5105a5
CC
772 if (!strcmp(var, "i18n.logoutputencoding"))
773 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 774
1141f492
LT
775 /* Add other config variables here and to Documentation/config.txt. */
776 return 0;
777}
039bc64e 778
1141f492
LT
779static int git_default_branch_config(const char *var, const char *value)
780{
9ed36cfa
JS
781 if (!strcmp(var, "branch.autosetupmerge")) {
782 if (value && !strcasecmp(value, "always")) {
783 git_branch_track = BRANCH_TRACK_ALWAYS;
784 return 0;
785 }
786 git_branch_track = git_config_bool(var, value);
787 return 0;
788 }
c998ae9b
DS
789 if (!strcmp(var, "branch.autosetuprebase")) {
790 if (!value)
791 return config_error_nonbool(var);
792 else if (!strcmp(value, "never"))
793 autorebase = AUTOREBASE_NEVER;
794 else if (!strcmp(value, "local"))
795 autorebase = AUTOREBASE_LOCAL;
796 else if (!strcmp(value, "remote"))
797 autorebase = AUTOREBASE_REMOTE;
798 else if (!strcmp(value, "always"))
799 autorebase = AUTOREBASE_ALWAYS;
800 else
801 return error("Malformed value for %s", var);
802 return 0;
803 }
a9cc857a 804
1ab661dd 805 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
806 return 0;
807}
808
52153747
FAG
809static int git_default_push_config(const char *var, const char *value)
810{
811 if (!strcmp(var, "push.default")) {
812 if (!value)
813 return config_error_nonbool(var);
814 else if (!strcmp(value, "nothing"))
815 push_default = PUSH_DEFAULT_NOTHING;
816 else if (!strcmp(value, "matching"))
817 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
818 else if (!strcmp(value, "simple"))
819 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
820 else if (!strcmp(value, "upstream"))
821 push_default = PUSH_DEFAULT_UPSTREAM;
822 else if (!strcmp(value, "tracking")) /* deprecated */
823 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
824 else if (!strcmp(value, "current"))
825 push_default = PUSH_DEFAULT_CURRENT;
826 else {
827 error("Malformed value for %s: %s", var, value);
b55e6775
MM
828 return error("Must be one of nothing, matching, simple, "
829 "upstream or current.");
52153747
FAG
830 }
831 return 0;
832 }
833
834 /* Add other config variables here and to Documentation/config.txt. */
835 return 0;
836}
837
d551a488
MSO
838static int git_default_mailmap_config(const char *var, const char *value)
839{
840 if (!strcmp(var, "mailmap.file"))
841 return git_config_string(&git_mailmap_file, var, value);
08610900
JK
842 if (!strcmp(var, "mailmap.blob"))
843 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
844
845 /* Add other config variables here and to Documentation/config.txt. */
846 return 0;
847}
848
1141f492
LT
849int git_default_config(const char *var, const char *value, void *dummy)
850{
851 if (!prefixcmp(var, "core."))
852 return git_default_core_config(var, value);
853
854 if (!prefixcmp(var, "user."))
9597921b 855 return git_ident_config(var, value, dummy);
1141f492
LT
856
857 if (!prefixcmp(var, "i18n."))
858 return git_default_i18n_config(var, value);
859
860 if (!prefixcmp(var, "branch."))
861 return git_default_branch_config(var, value);
862
52153747
FAG
863 if (!prefixcmp(var, "push."))
864 return git_default_push_config(var, value);
865
d551a488
MSO
866 if (!prefixcmp(var, "mailmap."))
867 return git_default_mailmap_config(var, value);
868
75194438
JK
869 if (!prefixcmp(var, "advice."))
870 return git_default_advice_config(var, value);
871
1141f492
LT
872 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
873 pager_use_color = git_config_bool(var,value);
874 return 0;
875 }
876
568508e7
JH
877 if (!strcmp(var, "pack.packsizelimit")) {
878 pack_size_limit_cfg = git_config_ulong(var, value);
879 return 0;
880 }
1141f492
LT
881 /* Add other config variables here and to Documentation/config.txt. */
882 return 0;
883}
884
ef90d6d4 885int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
886{
887 int ret;
4f629539 888 FILE *f = fopen(filename, "r");
17712991
LT
889
890 ret = -1;
891 if (f) {
924aaf3e
RJ
892 config_file top;
893
894 /* push config-file parsing state stack */
895 top.prev = cf;
896 top.f = f;
897 top.name = filename;
898 top.linenr = 1;
899 top.eof = 0;
900 strbuf_init(&top.value, 1024);
0971e992 901 strbuf_init(&top.var, 1024);
924aaf3e
RJ
902 cf = &top;
903
ef90d6d4 904 ret = git_parse_file(fn, data);
924aaf3e
RJ
905
906 /* pop config-file parsing state stack */
907 strbuf_release(&top.value);
0971e992 908 strbuf_release(&top.var);
924aaf3e
RJ
909 cf = top.prev;
910
17712991
LT
911 fclose(f);
912 }
913 return ret;
914}
10bea152 915
506b17b1
JS
916const char *git_etc_gitconfig(void)
917{
7f0e39fa 918 static const char *system_wide;
2de9de5e
SP
919 if (!system_wide)
920 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 921 return system_wide;
506b17b1
JS
922}
923
0ef37164 924int git_env_bool(const char *k, int def)
ab88c363
JK
925{
926 const char *v = getenv(k);
927 return v ? git_config_bool(k, v) : def;
928}
929
930int git_config_system(void)
931{
932 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
933}
934
dbdf5854 935int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 936{
aa387407 937 int ret = 0, found = 0;
21cf3227
HKNN
938 char *xdg_config = NULL;
939 char *user_config = NULL;
940
941 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 942
8f2bbe45 943 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK)) {
dc871831
DB
944 ret += git_config_from_file(fn, git_etc_gitconfig(),
945 data);
aa387407
FC
946 found += 1;
947 }
5f1a63e0 948
96b9e0e3 949 if (xdg_config && !access_or_die(xdg_config, R_OK)) {
21cf3227
HKNN
950 ret += git_config_from_file(fn, xdg_config, data);
951 found += 1;
952 }
953
96b9e0e3 954 if (user_config && !access_or_die(user_config, R_OK)) {
21cf3227
HKNN
955 ret += git_config_from_file(fn, user_config, data);
956 found += 1;
5f1a63e0
JS
957 }
958
8f2bbe45 959 if (repo_config && !access_or_die(repo_config, R_OK)) {
aa387407
FC
960 ret += git_config_from_file(fn, repo_config, data);
961 found += 1;
962 }
8b1fa778 963
5a0c9eeb
JK
964 switch (git_config_from_parameters(fn, data)) {
965 case -1: /* error */
1c2c9bee 966 die("unable to parse command-line config");
5a0c9eeb
JK
967 break;
968 case 0: /* found nothing */
969 break;
970 default: /* found at least one item */
971 found++;
972 break;
973 }
8b1fa778 974
21cf3227
HKNN
975 free(xdg_config);
976 free(user_config);
1f2baa78 977 return ret == 0 ? found : ret;
4f629539
JH
978}
979
c9b5e2a5 980int git_config_with_options(config_fn_t fn, void *data,
9b25a0b5 981 const char *filename, int respect_includes)
dbdf5854
NTND
982{
983 char *repo_config = NULL;
984 int ret;
9b25a0b5
JK
985 struct config_include_data inc = CONFIG_INCLUDE_INIT;
986
987 if (respect_includes) {
988 inc.fn = fn;
989 inc.data = data;
990 fn = git_config_include;
991 data = &inc;
992 }
dbdf5854 993
c9b5e2a5
JK
994 /*
995 * If we have a specific filename, use it. Otherwise, follow the
996 * regular lookup sequence.
997 */
998 if (filename)
999 return git_config_from_file(fn, filename, data);
1000
dbdf5854
NTND
1001 repo_config = git_pathdup("config");
1002 ret = git_config_early(fn, data, repo_config);
1003 if (repo_config)
1004 free(repo_config);
1005 return ret;
1006}
1007
c9b5e2a5
JK
1008int git_config(config_fn_t fn, void *data)
1009{
9b25a0b5 1010 return git_config_with_options(fn, data, NULL, 1);
c9b5e2a5
JK
1011}
1012
10bea152
JS
1013/*
1014 * Find all the stuff for git_config_set() below.
1015 */
4ddba79d
JS
1016
1017#define MAX_MATCHES 512
1018
10bea152
JS
1019static struct {
1020 int baselen;
4b25d091 1021 char *key;
f98d863d 1022 int do_not_match;
4b25d091 1023 regex_t *value_regex;
4ddba79d 1024 int multi_replace;
dc49cd76 1025 size_t offset[MAX_MATCHES];
10bea152
JS
1026 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1027 int seen;
1028} store;
1029
4b25d091 1030static int matches(const char *key, const char *value)
f98d863d
JS
1031{
1032 return !strcmp(key, store.key) &&
1033 (store.value_regex == NULL ||
1034 (store.do_not_match ^
1035 !regexec(store.value_regex, value, 0, NULL, 0)));
1036}
1037
4b25d091 1038static int store_aux(const char *key, const char *value, void *cb)
10bea152 1039{
ae9ee41d
JH
1040 const char *ep;
1041 size_t section_len;
924aaf3e 1042 FILE *f = cf->f;
ae9ee41d 1043
10bea152
JS
1044 switch (store.state) {
1045 case KEY_SEEN:
f98d863d 1046 if (matches(key, value)) {
4ddba79d 1047 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1048 warning("%s has multiple values", key);
4ddba79d 1049 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 1050 error("too many matches for %s", key);
4ddba79d 1051 return 1;
10bea152 1052 }
4ddba79d 1053
924aaf3e 1054 store.offset[store.seen] = ftell(f);
10bea152
JS
1055 store.seen++;
1056 }
1057 break;
1058 case SECTION_SEEN:
ae9ee41d
JH
1059 /*
1060 * What we are looking for is in store.key (both
1061 * section and var), and its section part is baselen
1062 * long. We found key (again, both section and var).
1063 * We would want to know if this key is in the same
1064 * section as what we are looking for. We already
1065 * know we are in the same section as what should
1066 * hold store.key.
1067 */
1068 ep = strrchr(key, '.');
1069 section_len = ep - key;
1070
1071 if ((section_len != store.baselen) ||
1072 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1073 store.state = SECTION_END_SEEN;
1074 break;
ae9ee41d
JH
1075 }
1076
1077 /*
1078 * Do not increment matches: this is no match, but we
1079 * just made sure we are in the desired section.
1080 */
924aaf3e 1081 store.offset[store.seen] = ftell(f);
10bea152
JS
1082 /* fallthru */
1083 case SECTION_END_SEEN:
1084 case START:
f98d863d 1085 if (matches(key, value)) {
924aaf3e 1086 store.offset[store.seen] = ftell(f);
10bea152
JS
1087 store.state = KEY_SEEN;
1088 store.seen++;
d14f7764
LT
1089 } else {
1090 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1091 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1092 store.state = SECTION_SEEN;
924aaf3e 1093 store.offset[store.seen] = ftell(f);
d14f7764 1094 }
bdf0ef08 1095 }
10bea152
JS
1096 }
1097 return 0;
1098}
1099
64c0d71c 1100static int write_error(const char *filename)
480c9e52 1101{
64c0d71c 1102 error("failed to write new configuration file %s", filename);
480c9e52
AW
1103
1104 /* Same error code as "failed to rename". */
1105 return 4;
1106}
1107
4b25d091 1108static int store_write_section(int fd, const char *key)
10bea152 1109{
cb891a59
KH
1110 const char *dot;
1111 int i, success;
f285a2d7 1112 struct strbuf sb = STRBUF_INIT;
d14f7764 1113
cb891a59 1114 dot = memchr(key, '.', store.baselen);
d14f7764 1115 if (dot) {
cb891a59
KH
1116 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1117 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1118 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1119 strbuf_addch(&sb, '\\');
1120 strbuf_addch(&sb, key[i]);
d14f7764 1121 }
cb891a59
KH
1122 strbuf_addstr(&sb, "\"]\n");
1123 } else {
1124 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1125 }
1126
cb891a59
KH
1127 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1128 strbuf_release(&sb);
480c9e52 1129
cb891a59 1130 return success;
10bea152
JS
1131}
1132
4b25d091 1133static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1134{
cb891a59
KH
1135 int i, success;
1136 int length = strlen(key + store.baselen + 1);
1137 const char *quote = "";
f285a2d7 1138 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1139
6281f394
JM
1140 /*
1141 * Check to see if the value needs to be surrounded with a dq pair.
1142 * Note that problematic characters are always backslash-quoted; this
1143 * check is about not losing leading or trailing SP and strings that
1144 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1145 * configuration parser.
1146 */
cdd4fb15 1147 if (value[0] == ' ')
cb891a59 1148 quote = "\"";
cdd4fb15
BG
1149 for (i = 0; value[i]; i++)
1150 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1151 quote = "\"";
1152 if (i && value[i - 1] == ' ')
1153 quote = "\"";
1154
cb891a59
KH
1155 strbuf_addf(&sb, "\t%.*s = %s",
1156 length, key + store.baselen + 1, quote);
10bea152 1157
10bea152
JS
1158 for (i = 0; value[i]; i++)
1159 switch (value[i]) {
480c9e52 1160 case '\n':
cb891a59 1161 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1162 break;
1163 case '\t':
cb891a59 1164 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1165 break;
1166 case '"':
1167 case '\\':
cb891a59 1168 strbuf_addch(&sb, '\\');
480c9e52 1169 default:
cb891a59 1170 strbuf_addch(&sb, value[i]);
480c9e52
AW
1171 break;
1172 }
cb891a59
KH
1173 strbuf_addf(&sb, "%s\n", quote);
1174
1175 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1176 strbuf_release(&sb);
1177
1178 return success;
10bea152
JS
1179}
1180
4b25d091
FC
1181static ssize_t find_beginning_of_line(const char *contents, size_t size,
1182 size_t offset_, int *found_bracket)
4ddba79d 1183{
dc49cd76
SP
1184 size_t equal_offset = size, bracket_offset = size;
1185 ssize_t offset;
4ddba79d 1186
7a31cc0f 1187contline:
a6080a0a 1188 for (offset = offset_-2; offset > 0
4ddba79d
JS
1189 && contents[offset] != '\n'; offset--)
1190 switch (contents[offset]) {
1191 case '=': equal_offset = offset; break;
1192 case ']': bracket_offset = offset; break;
1193 }
7a31cc0f
FL
1194 if (offset > 0 && contents[offset-1] == '\\') {
1195 offset_ = offset;
1196 goto contline;
1197 }
4ddba79d
JS
1198 if (bracket_offset < equal_offset) {
1199 *found_bracket = 1;
1200 offset = bracket_offset+1;
1201 } else
1202 offset++;
1203
1204 return offset;
1205}
1206
5ec31182
RR
1207int git_config_set_in_file(const char *config_filename,
1208 const char *key, const char *value)
1209{
1210 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1211}
1212
4b25d091 1213int git_config_set(const char *key, const char *value)
10bea152 1214{
4ddba79d 1215 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1216}
1217
b09c53a3
LP
1218/*
1219 * Auxiliary function to sanity-check and split the key into the section
1220 * identifier and variable name.
1221 *
1222 * Returns 0 on success, -1 when there is an invalid character in the key and
1223 * -2 if there is no section name in the key.
1224 *
1225 * store_key - pointer to char* which will hold a copy of the key with
1226 * lowercase section and variable name
1227 * baselen - pointer to int which will hold the length of the
1228 * section + subsection part, can be NULL
1229 */
1230int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1231{
1232 int i, dot, baselen;
1233 const char *last_dot = strrchr(key, '.');
1234
1235 /*
1236 * Since "key" actually contains the section name and the real
1237 * key name separated by a dot, we have to know where the dot is.
1238 */
1239
2169ddc0 1240 if (last_dot == NULL || last_dot == key) {
b09c53a3 1241 error("key does not contain a section: %s", key);
7a397419 1242 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1243 }
1244
2169ddc0
LP
1245 if (!last_dot[1]) {
1246 error("key does not contain variable name: %s", key);
7a397419 1247 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1248 }
1249
b09c53a3
LP
1250 baselen = last_dot - key;
1251 if (baselen_)
1252 *baselen_ = baselen;
1253
1254 /*
1255 * Validate the key and while at it, lower case it for matching.
1256 */
1257 *store_key = xmalloc(strlen(key) + 1);
1258
1259 dot = 0;
1260 for (i = 0; key[i]; i++) {
1261 unsigned char c = key[i];
1262 if (c == '.')
1263 dot = 1;
1264 /* Leave the extended basename untouched.. */
1265 if (!dot || i > baselen) {
1266 if (!iskeychar(c) ||
1267 (i == baselen + 1 && !isalpha(c))) {
1268 error("invalid key: %s", key);
1269 goto out_free_ret_1;
1270 }
1271 c = tolower(c);
1272 } else if (c == '\n') {
1273 error("invalid key (newline): %s", key);
1274 goto out_free_ret_1;
1275 }
1276 (*store_key)[i] = c;
1277 }
1278 (*store_key)[i] = 0;
1279
1280 return 0;
1281
1282out_free_ret_1:
1283 free(*store_key);
97ed50f9 1284 *store_key = NULL;
7a397419 1285 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1286}
1287
10bea152
JS
1288/*
1289 * If value==NULL, unset in (remove from) config,
1290 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1291 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1292 * else all matching key/values (regardless how many) are removed,
1293 * before the new pair is written.
10bea152
JS
1294 *
1295 * Returns 0 on success.
1296 *
1297 * This function does this:
1298 *
1299 * - it locks the config file by creating ".git/config.lock"
1300 *
1301 * - it then parses the config using store_aux() as validator to find
1302 * the position on the key/value pair to replace. If it is to be unset,
1303 * it must be found exactly once.
1304 *
1305 * - the config file is mmap()ed and the part before the match (if any) is
1306 * written to the lock file, then the changed part and the rest.
1307 *
1308 * - the config file is removed and the lock file rename()d to it.
1309 *
1310 */
5ec31182
RR
1311int git_config_set_multivar_in_file(const char *config_filename,
1312 const char *key, const char *value,
1313 const char *value_regex, int multi_replace)
10bea152 1314{
f8ba655e 1315 int fd = -1, in_fd;
dafc88b1 1316 int ret;
6cbf973c 1317 struct lock_file *lock = NULL;
0a5f5759 1318 char *filename_buf = NULL;
4ddba79d 1319
b09c53a3
LP
1320 /* parse-key returns negative; flip the sign to feed exit(3) */
1321 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1322 if (ret)
dafc88b1 1323 goto out_free;
b17e659d
JS
1324
1325 store.multi_replace = multi_replace;
10bea152 1326
0a5f5759
JK
1327 if (!config_filename)
1328 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1329
1330 /*
6cbf973c 1331 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1332 * contents of .git/config will be written into it.
1333 */
6cbf973c
BS
1334 lock = xcalloc(sizeof(struct lock_file), 1);
1335 fd = hold_lock_file_for_update(lock, config_filename, 0);
1336 if (fd < 0) {
6ffd567b 1337 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1338 free(store.key);
7a397419 1339 ret = CONFIG_NO_LOCK;
dafc88b1 1340 goto out_free;
10bea152
JS
1341 }
1342
1343 /*
1344 * If .git/config does not exist yet, write a minimal version.
1345 */
88fb958b
AR
1346 in_fd = open(config_filename, O_RDONLY);
1347 if ( in_fd < 0 ) {
10bea152
JS
1348 free(store.key);
1349
88fb958b
AR
1350 if ( ENOENT != errno ) {
1351 error("opening %s: %s", config_filename,
1352 strerror(errno));
7a397419 1353 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1354 goto out_free;
88fb958b 1355 }
10bea152
JS
1356 /* if nothing to unset, error out */
1357 if (value == NULL) {
7a397419 1358 ret = CONFIG_NOTHING_SET;
dafc88b1 1359 goto out_free;
10bea152
JS
1360 }
1361
4b25d091 1362 store.key = (char *)key;
480c9e52 1363 if (!store_write_section(fd, key) ||
93c1e079
JH
1364 !store_write_pair(fd, key, value))
1365 goto write_err_out;
1366 } else {
88fb958b 1367 struct stat st;
4b25d091 1368 char *contents;
dc49cd76
SP
1369 size_t contents_sz, copy_begin, copy_end;
1370 int i, new_line = 0;
10bea152
JS
1371
1372 if (value_regex == NULL)
1373 store.value_regex = NULL;
1374 else {
f98d863d
JS
1375 if (value_regex[0] == '!') {
1376 store.do_not_match = 1;
1377 value_regex++;
1378 } else
1379 store.do_not_match = 0;
1380
2d7320d0 1381 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1382 if (regcomp(store.value_regex, value_regex,
1383 REG_EXTENDED)) {
64c0d71c 1384 error("invalid pattern: %s", value_regex);
10bea152 1385 free(store.value_regex);
7a397419 1386 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1387 goto out_free;
10bea152
JS
1388 }
1389 }
1390
4ddba79d 1391 store.offset[0] = 0;
10bea152
JS
1392 store.state = START;
1393 store.seen = 0;
1394
1395 /*
1396 * After this, store.offset will contain the *end* offset
1397 * of the last match, or remain at 0 if no match was found.
1398 * As a side effect, we make sure to transform only a valid
1399 * existing config file.
1400 */
ef90d6d4 1401 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1402 error("invalid config file %s", config_filename);
10bea152
JS
1403 free(store.key);
1404 if (store.value_regex != NULL) {
1405 regfree(store.value_regex);
1406 free(store.value_regex);
1407 }
7a397419 1408 ret = CONFIG_INVALID_FILE;
dafc88b1 1409 goto out_free;
10bea152
JS
1410 }
1411
1412 free(store.key);
1413 if (store.value_regex != NULL) {
1414 regfree(store.value_regex);
1415 free(store.value_regex);
1416 }
1417
4ddba79d
JS
1418 /* if nothing to unset, or too many matches, error out */
1419 if ((store.seen == 0 && value == NULL) ||
1420 (store.seen > 1 && multi_replace == 0)) {
7a397419 1421 ret = CONFIG_NOTHING_SET;
dafc88b1 1422 goto out_free;
10bea152
JS
1423 }
1424
88fb958b 1425 fstat(in_fd, &st);
dc49cd76
SP
1426 contents_sz = xsize_t(st.st_size);
1427 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1428 MAP_PRIVATE, in_fd, 0);
1429 close(in_fd);
1430
4ddba79d
JS
1431 if (store.seen == 0)
1432 store.seen = 1;
1433
1434 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1435 if (store.offset[i] == 0) {
dc49cd76 1436 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1437 } else if (store.state != KEY_SEEN) {
1438 copy_end = store.offset[i];
10bea152 1439 } else
4ddba79d 1440 copy_end = find_beginning_of_line(
dc49cd76 1441 contents, contents_sz,
4ddba79d
JS
1442 store.offset[i]-2, &new_line);
1443
02e5ba4a
JK
1444 if (copy_end > 0 && contents[copy_end-1] != '\n')
1445 new_line = 1;
1446
4ddba79d
JS
1447 /* write the first part of the config */
1448 if (copy_end > copy_begin) {
93c1e079
JH
1449 if (write_in_full(fd, contents + copy_begin,
1450 copy_end - copy_begin) <
1451 copy_end - copy_begin)
1452 goto write_err_out;
1453 if (new_line &&
2b7ca830 1454 write_str_in_full(fd, "\n") != 1)
93c1e079 1455 goto write_err_out;
4ddba79d
JS
1456 }
1457 copy_begin = store.offset[i];
10bea152
JS
1458 }
1459
10bea152
JS
1460 /* write the pair (value == NULL means unset) */
1461 if (value != NULL) {
93c1e079
JH
1462 if (store.state == START) {
1463 if (!store_write_section(fd, key))
1464 goto write_err_out;
480c9e52 1465 }
93c1e079
JH
1466 if (!store_write_pair(fd, key, value))
1467 goto write_err_out;
10bea152
JS
1468 }
1469
1470 /* write the rest of the config */
dc49cd76 1471 if (copy_begin < contents_sz)
93c1e079 1472 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1473 contents_sz - copy_begin) <
1474 contents_sz - copy_begin)
93c1e079 1475 goto write_err_out;
10bea152 1476
dc49cd76 1477 munmap(contents, contents_sz);
10bea152
JS
1478 }
1479
4ed7cd3a 1480 if (commit_lock_file(lock) < 0) {
64c0d71c 1481 error("could not commit config file %s", config_filename);
7a397419 1482 ret = CONFIG_NO_WRITE;
dafc88b1 1483 goto out_free;
10bea152
JS
1484 }
1485
6cbf973c
BS
1486 /*
1487 * lock is committed, so don't try to roll it back below.
1488 * NOTE: Since lockfile.c keeps a linked list of all created
1489 * lock_file structures, it isn't safe to free(lock). It's
1490 * better to just leave it hanging around.
1491 */
1492 lock = NULL;
dafc88b1
SH
1493 ret = 0;
1494
1495out_free:
6cbf973c
BS
1496 if (lock)
1497 rollback_lock_file(lock);
0a5f5759 1498 free(filename_buf);
dafc88b1 1499 return ret;
93c1e079
JH
1500
1501write_err_out:
64c0d71c 1502 ret = write_error(lock->filename);
93c1e079
JH
1503 goto out_free;
1504
10bea152
JS
1505}
1506
5ec31182
RR
1507int git_config_set_multivar(const char *key, const char *value,
1508 const char *value_regex, int multi_replace)
1509{
4a7bb5ba 1510 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1511 multi_replace);
5ec31182
RR
1512}
1513
118f8b24
PB
1514static int section_name_match (const char *buf, const char *name)
1515{
1516 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1517 if (buf[i] != '[')
1518 return 0;
1519 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1520 if (!dot && isspace(buf[i])) {
1521 dot = 1;
1522 if (name[j++] != '.')
1523 break;
1524 for (i++; isspace(buf[i]); i++)
1525 ; /* do nothing */
1526 if (buf[i] != '"')
1527 break;
1528 continue;
1529 }
1530 if (buf[i] == '\\' && dot)
1531 i++;
1532 else if (buf[i] == '"' && dot) {
1533 for (i++; isspace(buf[i]); i++)
1534 ; /* do_nothing */
1535 break;
1536 }
1537 if (buf[i] != name[j++])
1538 break;
1539 }
a4c0d463
AV
1540 if (buf[i] == ']' && name[j] == 0) {
1541 /*
1542 * We match, now just find the right length offset by
1543 * gobbling up any whitespace after it, as well
1544 */
1545 i++;
1546 for (; buf[i] && isspace(buf[i]); i++)
1547 ; /* do nothing */
1548 return i;
1549 }
1550 return 0;
118f8b24
PB
1551}
1552
94a35b1a
JK
1553static int section_name_is_ok(const char *name)
1554{
1555 /* Empty section names are bogus. */
1556 if (!*name)
1557 return 0;
1558
1559 /*
1560 * Before a dot, we must be alphanumeric or dash. After the first dot,
1561 * anything goes, so we can stop checking.
1562 */
1563 for (; *name && *name != '.'; name++)
1564 if (*name != '-' && !isalnum(*name))
1565 return 0;
1566 return 1;
1567}
1568
118f8b24 1569/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1570int git_config_rename_section_in_file(const char *config_filename,
1571 const char *old_name, const char *new_name)
0667fcfb 1572{
118f8b24 1573 int ret = 0, remove = 0;
42bd39b5 1574 char *filename_buf = NULL;
94a35b1a 1575 struct lock_file *lock;
0667fcfb
JS
1576 int out_fd;
1577 char buf[1024];
924aaf3e 1578 FILE *config_file;
0667fcfb 1579
94a35b1a
JK
1580 if (new_name && !section_name_is_ok(new_name)) {
1581 ret = error("invalid section name: %s", new_name);
1582 goto out;
1583 }
1584
42bd39b5
JK
1585 if (!config_filename)
1586 config_filename = filename_buf = git_pathdup("config");
1587
94a35b1a 1588 lock = xcalloc(sizeof(struct lock_file), 1);
0667fcfb 1589 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1590 if (out_fd < 0) {
64c0d71c 1591 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1592 goto out;
1593 }
0667fcfb 1594
fc1905bb 1595 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1596 /* no config file means nothing to rename, no error */
1597 goto unlock_and_out;
fc1905bb 1598 }
0667fcfb
JS
1599
1600 while (fgets(buf, sizeof(buf), config_file)) {
1601 int i;
480c9e52 1602 int length;
9a5abfc7 1603 char *output = buf;
0667fcfb
JS
1604 for (i = 0; buf[i] && isspace(buf[i]); i++)
1605 ; /* do nothing */
1606 if (buf[i] == '[') {
1607 /* it's a section */
a4c0d463
AV
1608 int offset = section_name_match(&buf[i], old_name);
1609 if (offset > 0) {
118f8b24
PB
1610 ret++;
1611 if (new_name == NULL) {
1612 remove = 1;
0667fcfb
JS
1613 continue;
1614 }
0667fcfb 1615 store.baselen = strlen(new_name);
480c9e52 1616 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1617 ret = write_error(lock->filename);
480c9e52
AW
1618 goto out;
1619 }
9a5abfc7
AV
1620 /*
1621 * We wrote out the new section, with
1622 * a newline, now skip the old
1623 * section's length
1624 */
1625 output += offset + i;
1626 if (strlen(output) > 0) {
1627 /*
1628 * More content means there's
1629 * a declaration to put on the
1630 * next line; indent with a
1631 * tab
1632 */
1633 output -= 1;
1634 output[0] = '\t';
1635 }
0667fcfb 1636 }
118f8b24 1637 remove = 0;
0667fcfb 1638 }
118f8b24
PB
1639 if (remove)
1640 continue;
9a5abfc7
AV
1641 length = strlen(output);
1642 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1643 ret = write_error(lock->filename);
480c9e52
AW
1644 goto out;
1645 }
0667fcfb 1646 }
fc1905bb 1647 fclose(config_file);
8b590075 1648unlock_and_out:
4ed7cd3a 1649 if (commit_lock_file(lock) < 0)
64c0d71c 1650 ret = error("could not commit config file %s", config_filename);
8b590075 1651out:
42bd39b5 1652 free(filename_buf);
0667fcfb
JS
1653 return ret;
1654}
40ea4ed9 1655
42bd39b5
JK
1656int git_config_rename_section(const char *old_name, const char *new_name)
1657{
4a7bb5ba 1658 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1659}
1660
40ea4ed9
JH
1661/*
1662 * Call this to report error for your variable that should not
1663 * get a boolean value (i.e. "[my] var" means "true").
1664 */
a469a101 1665#undef config_error_nonbool
40ea4ed9
JH
1666int config_error_nonbool(const char *var)
1667{
1668 return error("Missing value for '%s'", var);
1669}