rename git_config_from_buf to git_config_from_mem
[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"
697cc8ef 9#include "lockfile.h"
7f0e39fa 10#include "exec_cmd.h"
572e4f6a 11#include "strbuf.h"
2b64fc89 12#include "quote.h"
3c8687a7
TA
13#include "hashmap.h"
14#include "string-list.h"
599446dc 15#include "utf8.h"
17712991 16
4d8dd149
HV
17struct config_source {
18 struct config_source *prev;
19 union {
20 FILE *file;
1bc88819
HV
21 struct config_buf {
22 const char *buf;
23 size_t len;
24 size_t pos;
25 } buf;
4d8dd149 26 } u;
924aaf3e 27 const char *name;
d14d4244 28 const char *path;
b2dc0945 29 int die_on_error;
924aaf3e
RJ
30 int linenr;
31 int eof;
32 struct strbuf value;
0971e992 33 struct strbuf var;
924aaf3e 34
49d6cfa5
JK
35 int (*do_fgetc)(struct config_source *c);
36 int (*do_ungetc)(int c, struct config_source *conf);
37 long (*do_ftell)(struct config_source *c);
4d8dd149
HV
38};
39
40static struct config_source *cf;
924aaf3e 41
960ccca6
DH
42static int zlib_compression_seen;
43
3c8687a7
TA
44/*
45 * Default config_set that contains key-value pairs from the usual set of config
46 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
47 * config file and the global /etc/gitconfig)
48 */
49static struct config_set the_config_set;
50
4d8dd149
HV
51static int config_file_fgetc(struct config_source *conf)
52{
260d408e 53 return getc_unlocked(conf->u.file);
4d8dd149
HV
54}
55
56static int config_file_ungetc(int c, struct config_source *conf)
57{
58 return ungetc(c, conf->u.file);
59}
60
61static long config_file_ftell(struct config_source *conf)
62{
63 return ftell(conf->u.file);
64}
65
1bc88819
HV
66
67static int config_buf_fgetc(struct config_source *conf)
68{
69 if (conf->u.buf.pos < conf->u.buf.len)
70 return conf->u.buf.buf[conf->u.buf.pos++];
71
72 return EOF;
73}
74
75static int config_buf_ungetc(int c, struct config_source *conf)
76{
1d0655c1
JK
77 if (conf->u.buf.pos > 0) {
78 conf->u.buf.pos--;
79 if (conf->u.buf.buf[conf->u.buf.pos] != c)
80 die("BUG: config_buf can only ungetc the same character");
81 return c;
82 }
1bc88819
HV
83
84 return EOF;
85}
86
87static long config_buf_ftell(struct config_source *conf)
88{
89 return conf->u.buf.pos;
90}
91
9b25a0b5
JK
92#define MAX_INCLUDE_DEPTH 10
93static const char include_depth_advice[] =
94"exceeded maximum include depth (%d) while including\n"
95" %s\n"
96"from\n"
97" %s\n"
98"Do you have circular includes?";
99static int handle_path_include(const char *path, struct config_include_data *inc)
100{
101 int ret = 0;
102 struct strbuf buf = STRBUF_INIT;
67beb600 103 char *expanded;
4c0a89fc 104
67beb600
JK
105 if (!path)
106 return config_error_nonbool("include.path");
107
108 expanded = expand_user_path(path);
4c0a89fc
JK
109 if (!expanded)
110 return error("Could not expand include path '%s'", path);
111 path = expanded;
9b25a0b5
JK
112
113 /*
114 * Use an absolute path as-is, but interpret relative paths
115 * based on the including config file.
116 */
117 if (!is_absolute_path(path)) {
118 char *slash;
119
d14d4244 120 if (!cf || !cf->path)
9b25a0b5
JK
121 return error("relative config includes must come from files");
122
d14d4244 123 slash = find_last_dir_sep(cf->path);
9b25a0b5 124 if (slash)
d14d4244 125 strbuf_add(&buf, cf->path, slash - cf->path + 1);
9b25a0b5
JK
126 strbuf_addstr(&buf, path);
127 path = buf.buf;
128 }
129
4698c8fe 130 if (!access_or_die(path, R_OK, 0)) {
9b25a0b5
JK
131 if (++inc->depth > MAX_INCLUDE_DEPTH)
132 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
133 cf && cf->name ? cf->name : "the command line");
134 ret = git_config_from_file(git_config_include, path, inc);
135 inc->depth--;
136 }
137 strbuf_release(&buf);
4c0a89fc 138 free(expanded);
9b25a0b5
JK
139 return ret;
140}
141
142int git_config_include(const char *var, const char *value, void *data)
143{
144 struct config_include_data *inc = data;
9b25a0b5
JK
145 int ret;
146
147 /*
148 * Pass along all values, including "include" directives; this makes it
149 * possible to query information on the includes themselves.
150 */
151 ret = inc->fn(var, value, inc->data);
152 if (ret < 0)
153 return ret;
154
37007c3a 155 if (!strcmp(var, "include.path"))
9b25a0b5
JK
156 ret = handle_path_include(value, inc);
157 return ret;
158}
159
2b64fc89
JK
160void git_config_push_parameter(const char *text)
161{
162 struct strbuf env = STRBUF_INIT;
163 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
164 if (old) {
165 strbuf_addstr(&env, old);
166 strbuf_addch(&env, ' ');
167 }
168 sq_quote_buf(&env, text);
169 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
170 strbuf_release(&env);
171}
172
2496844b
JK
173int git_config_parse_parameter(const char *text,
174 config_fn_t fn, void *data)
8b1fa778 175{
a789ca70 176 const char *value;
572e4f6a 177 struct strbuf **pair;
a789ca70 178
f77bccae 179 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
180 if (!pair[0])
181 return error("bogus config parameter: %s", text);
a789ca70
JH
182
183 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
572e4f6a 184 strbuf_setlen(pair[0], pair[0]->len - 1);
a789ca70
JH
185 value = pair[1] ? pair[1]->buf : "";
186 } else {
187 value = NULL;
188 }
189
572e4f6a
AR
190 strbuf_trim(pair[0]);
191 if (!pair[0]->len) {
192 strbuf_list_free(pair);
06eb708f 193 return error("bogus config parameter: %s", text);
8b1fa778 194 }
ffb20ce1 195 strbuf_tolower(pair[0]);
a789ca70 196 if (fn(pair[0]->buf, value, data) < 0) {
06eb708f
JK
197 strbuf_list_free(pair);
198 return -1;
572e4f6a
AR
199 }
200 strbuf_list_free(pair);
8b1fa778
AR
201 return 0;
202}
203
06eb708f
JK
204int git_config_from_parameters(config_fn_t fn, void *data)
205{
2b64fc89
JK
206 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
207 char *envw;
208 const char **argv = NULL;
209 int nr = 0, alloc = 0;
210 int i;
211
212 if (!env)
213 return 0;
214 /* sq_dequote will write over it */
215 envw = xstrdup(env);
216
217 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
218 free(envw);
219 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
220 }
221
222 for (i = 0; i < nr; i++) {
06eb708f 223 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
224 free(argv);
225 free(envw);
226 return -1;
227 }
228 }
229
230 free(argv);
231 free(envw);
06eb708f 232 return nr > 0;
2b64fc89
JK
233}
234
17712991
LT
235static int get_next_char(void)
236{
49d6cfa5 237 int c = cf->do_fgetc(cf);
17712991 238
dbb9a812
HV
239 if (c == '\r') {
240 /* DOS like systems */
49d6cfa5 241 c = cf->do_fgetc(cf);
dbb9a812 242 if (c != '\n') {
5e0be134
JK
243 if (c != EOF)
244 cf->do_ungetc(c, cf);
dbb9a812 245 c = '\r';
17712991
LT
246 }
247 }
dbb9a812
HV
248 if (c == '\n')
249 cf->linenr++;
250 if (c == EOF) {
251 cf->eof = 1;
b3b3f60b 252 cf->linenr++;
dbb9a812
HV
253 c = '\n';
254 }
17712991
LT
255 return c;
256}
257
258static char *parse_value(void)
259{
e96c19c5 260 int quote = 0, comment = 0, space = 0;
17712991 261
924aaf3e 262 strbuf_reset(&cf->value);
17712991
LT
263 for (;;) {
264 int c = get_next_char();
17712991 265 if (c == '\n') {
4b340593
MS
266 if (quote) {
267 cf->linenr--;
17712991 268 return NULL;
4b340593 269 }
924aaf3e 270 return cf->value.buf;
17712991
LT
271 }
272 if (comment)
273 continue;
274 if (isspace(c) && !quote) {
924aaf3e 275 if (cf->value.len)
ebdaae37 276 space++;
17712991
LT
277 continue;
278 }
7ebdba61
JS
279 if (!quote) {
280 if (c == ';' || c == '#') {
281 comment = 1;
282 continue;
283 }
284 }
ebdaae37 285 for (; space; space--)
924aaf3e 286 strbuf_addch(&cf->value, ' ');
17712991
LT
287 if (c == '\\') {
288 c = get_next_char();
289 switch (c) {
290 case '\n':
291 continue;
292 case 't':
293 c = '\t';
294 break;
295 case 'b':
296 c = '\b';
297 break;
298 case 'n':
299 c = '\n';
300 break;
5cbb401d
LT
301 /* Some characters escape as themselves */
302 case '\\': case '"':
303 break;
304 /* Reject unknown escape sequences */
305 default:
306 return NULL;
17712991 307 }
924aaf3e 308 strbuf_addch(&cf->value, c);
17712991
LT
309 continue;
310 }
311 if (c == '"') {
312 quote = 1-quote;
313 continue;
314 }
924aaf3e 315 strbuf_addch(&cf->value, c);
17712991
LT
316 }
317}
318
38c5afa8
LT
319static inline int iskeychar(int c)
320{
321 return isalnum(c) || c == '-';
322}
323
0971e992 324static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
325{
326 int c;
327 char *value;
b3b3f60b 328 int ret;
17712991
LT
329
330 /* Get the full name */
331 for (;;) {
332 c = get_next_char();
924aaf3e 333 if (cf->eof)
17712991 334 break;
38c5afa8 335 if (!iskeychar(c))
17712991 336 break;
0971e992 337 strbuf_addch(name, tolower(c));
17712991 338 }
0971e992 339
17712991
LT
340 while (c == ' ' || c == '\t')
341 c = get_next_char();
342
343 value = NULL;
344 if (c != '\n') {
345 if (c != '=')
346 return -1;
347 value = parse_value();
348 if (!value)
349 return -1;
350 }
b3b3f60b
MM
351 /*
352 * We already consumed the \n, but we need linenr to point to
353 * the line we just parsed during the call to fn to get
354 * accurate line number in error messages.
355 */
356 cf->linenr--;
357 ret = fn(name->buf, value, data);
358 cf->linenr++;
359 return ret;
17712991
LT
360}
361
0971e992 362static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
363{
364 do {
365 if (c == '\n')
4b340593 366 goto error_incomplete_line;
d14f7764
LT
367 c = get_next_char();
368 } while (isspace(c));
369
370 /* We require the format to be '[base "extension"]' */
371 if (c != '"')
372 return -1;
0971e992 373 strbuf_addch(name, '.');
d14f7764
LT
374
375 for (;;) {
376 int c = get_next_char();
377 if (c == '\n')
4b340593 378 goto error_incomplete_line;
d14f7764
LT
379 if (c == '"')
380 break;
381 if (c == '\\') {
382 c = get_next_char();
383 if (c == '\n')
4b340593 384 goto error_incomplete_line;
d14f7764 385 }
0971e992 386 strbuf_addch(name, c);
d14f7764
LT
387 }
388
389 /* Final ']' */
390 if (get_next_char() != ']')
391 return -1;
0971e992 392 return 0;
4b340593
MS
393error_incomplete_line:
394 cf->linenr--;
395 return -1;
d14f7764
LT
396}
397
0971e992 398static int get_base_var(struct strbuf *name)
17712991 399{
17712991
LT
400 for (;;) {
401 int c = get_next_char();
924aaf3e 402 if (cf->eof)
17712991
LT
403 return -1;
404 if (c == ']')
0971e992 405 return 0;
d14f7764 406 if (isspace(c))
0971e992 407 return get_extended_base_var(name, c);
38c5afa8 408 if (!iskeychar(c) && c != '.')
17712991 409 return -1;
0971e992 410 strbuf_addch(name, tolower(c));
17712991
LT
411 }
412}
413
4d8dd149 414static int git_parse_source(config_fn_t fn, void *data)
17712991
LT
415{
416 int comment = 0;
417 int baselen = 0;
0971e992 418 struct strbuf *var = &cf->var;
17712991 419
de056402 420 /* U+FEFF Byte Order Mark in UTF8 */
599446dc 421 const char *bomptr = utf8_bom;
de056402 422
17712991
LT
423 for (;;) {
424 int c = get_next_char();
de056402
PB
425 if (bomptr && *bomptr) {
426 /* We are at the file beginning; skip UTF8-encoded BOM
427 * if present. Sane editors won't put this in on their
428 * own, but e.g. Windows Notepad will do it happily. */
599446dc 429 if (c == (*bomptr & 0377)) {
de056402
PB
430 bomptr++;
431 continue;
432 } else {
433 /* Do not tolerate partial BOM. */
434 if (bomptr != utf8_bom)
435 break;
436 /* No BOM at file beginning. Cool. */
437 bomptr = NULL;
438 }
439 }
17712991 440 if (c == '\n') {
924aaf3e 441 if (cf->eof)
17712991
LT
442 return 0;
443 comment = 0;
444 continue;
445 }
446 if (comment || isspace(c))
447 continue;
448 if (c == '#' || c == ';') {
449 comment = 1;
450 continue;
451 }
452 if (c == '[') {
0971e992
BW
453 /* Reset prior to determining a new stem */
454 strbuf_reset(var);
455 if (get_base_var(var) < 0 || var->len < 1)
17712991 456 break;
0971e992
BW
457 strbuf_addch(var, '.');
458 baselen = var->len;
17712991
LT
459 continue;
460 }
461 if (!isalpha(c))
462 break;
0971e992
BW
463 /*
464 * Truncate the var name back to the section header
465 * stem prior to grabbing the suffix part of the name
466 * and the value.
467 */
468 strbuf_setlen(var, baselen);
469 strbuf_addch(var, tolower(c));
470 if (get_value(fn, data, var) < 0)
17712991
LT
471 break;
472 }
b2dc0945 473 if (cf->die_on_error)
8262aaa2 474 die(_("bad config file line %d in %s"), cf->linenr, cf->name);
b2dc0945 475 else
8262aaa2 476 return error(_("bad config file line %d in %s"), cf->linenr, cf->name);
17712991
LT
477}
478
ebaa1bd4 479static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
480{
481 if (!*end)
482 return 1;
c8deb5a1
SP
483 else if (!strcasecmp(end, "k")) {
484 *val *= 1024;
485 return 1;
486 }
487 else if (!strcasecmp(end, "m")) {
488 *val *= 1024 * 1024;
489 return 1;
490 }
491 else if (!strcasecmp(end, "g")) {
492 *val *= 1024 * 1024 * 1024;
493 return 1;
494 }
495 return 0;
0b87b6e0
BD
496}
497
7192777d 498static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
0b87b6e0
BD
499{
500 if (value && *value) {
501 char *end;
ebaa1bd4
NA
502 intmax_t val;
503 uintmax_t uval;
504 uintmax_t factor = 1;
505
506 errno = 0;
507 val = strtoimax(value, &end, 0);
508 if (errno == ERANGE)
509 return 0;
33fdd77e
JK
510 if (!parse_unit_factor(end, &factor)) {
511 errno = EINVAL;
c8deb5a1 512 return 0;
33fdd77e 513 }
83915ba5 514 uval = labs(val);
ebaa1bd4 515 uval *= factor;
83915ba5 516 if (uval > max || labs(val) > uval) {
33fdd77e 517 errno = ERANGE;
ebaa1bd4 518 return 0;
33fdd77e 519 }
ebaa1bd4
NA
520 val *= factor;
521 *ret = val;
0b87b6e0
BD
522 return 1;
523 }
33fdd77e 524 errno = EINVAL;
0b87b6e0
BD
525 return 0;
526}
527
0b4dc661 528static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
17712991
LT
529{
530 if (value && *value) {
531 char *end;
ebaa1bd4
NA
532 uintmax_t val;
533 uintmax_t oldval;
534
535 errno = 0;
536 val = strtoumax(value, &end, 0);
537 if (errno == ERANGE)
538 return 0;
539 oldval = val;
33fdd77e
JK
540 if (!parse_unit_factor(end, &val)) {
541 errno = EINVAL;
c8deb5a1 542 return 0;
33fdd77e
JK
543 }
544 if (val > max || oldval > val) {
545 errno = ERANGE;
ebaa1bd4 546 return 0;
33fdd77e 547 }
c8deb5a1 548 *ret = val;
0b87b6e0 549 return 1;
17712991 550 }
33fdd77e 551 errno = EINVAL;
0b87b6e0
BD
552 return 0;
553}
554
42d194e9 555static int git_parse_int(const char *value, int *ret)
c1867cea 556{
7192777d 557 intmax_t tmp;
42d194e9 558 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
7192777d
JK
559 return 0;
560 *ret = tmp;
561 return 1;
562}
563
00160242
JK
564static int git_parse_int64(const char *value, int64_t *ret)
565{
566 intmax_t tmp;
567 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
568 return 0;
569 *ret = tmp;
570 return 1;
571}
572
7192777d
JK
573int git_parse_ulong(const char *value, unsigned long *ret)
574{
575 uintmax_t tmp;
576 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
577 return 0;
578 *ret = tmp;
579 return 1;
580}
581
06bdc23b 582NORETURN
2f666581 583static void die_bad_number(const char *name, const char *value)
c1867cea 584{
2f666581
JK
585 const char *reason = errno == ERANGE ?
586 "out of range" :
587 "invalid unit";
588 if (!value)
589 value = "";
590
924aaf3e 591 if (cf && cf->name)
8262aaa2 592 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
2f666581 593 value, name, cf->name, reason);
8262aaa2 594 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
c1867cea
JK
595}
596
0b87b6e0
BD
597int git_config_int(const char *name, const char *value)
598{
42d194e9
JK
599 int ret;
600 if (!git_parse_int(value, &ret))
2f666581 601 die_bad_number(name, value);
0b87b6e0
BD
602 return ret;
603}
604
00160242
JK
605int64_t git_config_int64(const char *name, const char *value)
606{
607 int64_t ret;
608 if (!git_parse_int64(value, &ret))
609 die_bad_number(name, value);
0b87b6e0
BD
610 return ret;
611}
612
613unsigned long git_config_ulong(const char *name, const char *value)
614{
615 unsigned long ret;
616 if (!git_parse_ulong(value, &ret))
2f666581 617 die_bad_number(name, value);
0b87b6e0 618 return ret;
17712991
LT
619}
620
9a549d43 621int git_parse_maybe_bool(const char *value)
17712991
LT
622{
623 if (!value)
624 return 1;
625 if (!*value)
626 return 0;
8420ccd8
JH
627 if (!strcasecmp(value, "true")
628 || !strcasecmp(value, "yes")
629 || !strcasecmp(value, "on"))
17712991 630 return 1;
8420ccd8
JH
631 if (!strcasecmp(value, "false")
632 || !strcasecmp(value, "no")
633 || !strcasecmp(value, "off"))
17712991 634 return 0;
8420ccd8
JH
635 return -1;
636}
637
b2be2f6a
JK
638int git_config_maybe_bool(const char *name, const char *value)
639{
9a549d43 640 int v = git_parse_maybe_bool(value);
b2be2f6a
JK
641 if (0 <= v)
642 return v;
42d194e9 643 if (git_parse_int(value, &v))
db6195ef 644 return !!v;
b2be2f6a
JK
645 return -1;
646}
647
8420ccd8
JH
648int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
649{
9a549d43 650 int v = git_parse_maybe_bool(value);
8420ccd8
JH
651 if (0 <= v) {
652 *is_bool = 1;
653 return v;
654 }
a53f2ec6 655 *is_bool = 0;
c35b0b58 656 return git_config_int(name, value);
17712991
LT
657}
658
a53f2ec6
JH
659int git_config_bool(const char *name, const char *value)
660{
661 int discard;
c35b0b58 662 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
663}
664
ea5105a5
CC
665int git_config_string(const char **dest, const char *var, const char *value)
666{
667 if (!value)
668 return config_error_nonbool(var);
669 *dest = xstrdup(value);
670 return 0;
671}
672
395de250
MM
673int git_config_pathname(const char **dest, const char *var, const char *value)
674{
675 if (!value)
676 return config_error_nonbool(var);
677 *dest = expand_user_path(value);
678 if (!*dest)
8262aaa2 679 die(_("failed to expand user dir in: '%s'"), value);
395de250
MM
680 return 0;
681}
682
806e2ad7 683static int git_default_core_config(const char *var, const char *value)
17712991
LT
684{
685 /* This needs a better name */
686 if (!strcmp(var, "core.filemode")) {
687 trust_executable_bit = git_config_bool(var, value);
688 return 0;
689 }
1ce4790b
AR
690 if (!strcmp(var, "core.trustctime")) {
691 trust_ctime = git_config_bool(var, value);
692 return 0;
693 }
c1b5d738 694 if (!strcmp(var, "core.checkstat")) {
c08e4d5b
RR
695 if (!strcasecmp(value, "default"))
696 check_stat = 1;
697 else if (!strcasecmp(value, "minimal"))
698 check_stat = 0;
699 }
17712991 700
9378c161
JH
701 if (!strcmp(var, "core.quotepath")) {
702 quote_path_fully = git_config_bool(var, value);
703 return 0;
704 }
705
78a8d641
JS
706 if (!strcmp(var, "core.symlinks")) {
707 has_symlinks = git_config_bool(var, value);
708 return 0;
709 }
710
0a9b88b7
LT
711 if (!strcmp(var, "core.ignorecase")) {
712 ignore_case = git_config_bool(var, value);
713 return 0;
714 }
715
64589a03
JH
716 if (!strcmp(var, "core.attributesfile"))
717 return git_config_pathname(&git_attributes_file, var, value);
718
7d1864ce
JH
719 if (!strcmp(var, "core.bare")) {
720 is_bare_repository_cfg = git_config_bool(var, value);
721 return 0;
722 }
723
5f73076c
JH
724 if (!strcmp(var, "core.ignorestat")) {
725 assume_unchanged = git_config_bool(var, value);
726 return 0;
727 }
728
e388c738
JH
729 if (!strcmp(var, "core.prefersymlinkrefs")) {
730 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
731 return 0;
732 }
733
6de08ae6
SP
734 if (!strcmp(var, "core.logallrefupdates")) {
735 log_all_ref_updates = git_config_bool(var, value);
736 return 0;
737 }
738
2f8acdb3
JH
739 if (!strcmp(var, "core.warnambiguousrefs")) {
740 warn_ambiguous_refs = git_config_bool(var, value);
741 return 0;
742 }
743
a71f09fe 744 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
745 int abbrev = git_config_int(var, value);
746 if (abbrev < minimum_abbrev || abbrev > 40)
747 return -1;
748 default_abbrev = abbrev;
749 return 0;
750 }
751
960ccca6 752 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
753 int level = git_config_int(var, value);
754 if (level == -1)
755 level = Z_DEFAULT_COMPRESSION;
756 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 757 die(_("bad zlib compression level %d"), level);
12f6c308 758 zlib_compression_level = level;
960ccca6
DH
759 zlib_compression_seen = 1;
760 return 0;
761 }
762
763 if (!strcmp(var, "core.compression")) {
764 int level = git_config_int(var, value);
765 if (level == -1)
766 level = Z_DEFAULT_COMPRESSION;
767 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 768 die(_("bad zlib compression level %d"), level);
960ccca6
DH
769 core_compression_level = level;
770 core_compression_seen = 1;
771 if (!zlib_compression_seen)
772 zlib_compression_level = level;
12f6c308
JBH
773 return 0;
774 }
775
60bb8b14 776 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 777 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 778 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
779
780 /* This value must be multiple of (pagesize * 2) */
781 packed_git_window_size /= pgsz_x2;
782 if (packed_git_window_size < 1)
783 packed_git_window_size = 1;
784 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
785 return 0;
786 }
787
15366280 788 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 789 big_file_threshold = git_config_ulong(var, value);
15366280
JH
790 return 0;
791 }
792
77ccc5bb 793 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 794 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
795 return 0;
796 }
797
18bdec11 798 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 799 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
800 return 0;
801 }
802
6c510bee 803 if (!strcmp(var, "core.autocrlf")) {
d7f46334 804 if (value && !strcasecmp(value, "input")) {
ec70f52f 805 if (core_eol == EOL_CRLF)
942e7747 806 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 807 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
808 return 0;
809 }
6c510bee
LT
810 auto_crlf = git_config_bool(var, value);
811 return 0;
812 }
813
21e5ad50
SP
814 if (!strcmp(var, "core.safecrlf")) {
815 if (value && !strcasecmp(value, "warn")) {
816 safe_crlf = SAFE_CRLF_WARN;
817 return 0;
818 }
819 safe_crlf = git_config_bool(var, value);
820 return 0;
821 }
822
942e7747
EB
823 if (!strcmp(var, "core.eol")) {
824 if (value && !strcasecmp(value, "lf"))
ec70f52f 825 core_eol = EOL_LF;
942e7747 826 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 827 core_eol = EOL_CRLF;
942e7747 828 else if (value && !strcasecmp(value, "native"))
ec70f52f 829 core_eol = EOL_NATIVE;
942e7747 830 else
ec70f52f
JH
831 core_eol = EOL_UNSET;
832 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
833 return error("core.autocrlf=input conflicts with core.eol=crlf");
834 return 0;
835 }
836
a97a7468
JS
837 if (!strcmp(var, "core.notesref")) {
838 notes_ref_name = xstrdup(value);
839 return 0;
840 }
841
806e2ad7
LT
842 if (!strcmp(var, "core.pager"))
843 return git_config_string(&pager_program, var, value);
844
845 if (!strcmp(var, "core.editor"))
846 return git_config_string(&editor_program, var, value);
847
eff80a9f 848 if (!strcmp(var, "core.commentchar")) {
649409b7
JK
849 if (!value)
850 return config_error_nonbool(var);
ad524f83 851 else if (!strcasecmp(value, "auto"))
84c9dc2c 852 auto_comment_line_char = 1;
ad524f83 853 else if (value[0] && !value[1]) {
649409b7 854 comment_line_char = value[0];
84c9dc2c 855 auto_comment_line_char = 0;
50b54fd7
NTND
856 } else
857 return error("core.commentChar should only be one character");
858 return 0;
eff80a9f
JH
859 }
860
d3e7da89
AK
861 if (!strcmp(var, "core.askpass"))
862 return git_config_string(&askpass_program, var, value);
863
806e2ad7 864 if (!strcmp(var, "core.excludesfile"))
395de250 865 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
866
867 if (!strcmp(var, "core.whitespace")) {
868 if (!value)
869 return config_error_nonbool(var);
870 whitespace_rule_cfg = parse_whitespace_rule(value);
871 return 0;
872 }
873
aafe9fba
LT
874 if (!strcmp(var, "core.fsyncobjectfiles")) {
875 fsync_object_files = git_config_bool(var, value);
876 return 0;
877 }
878
671c9b7e
LT
879 if (!strcmp(var, "core.preloadindex")) {
880 core_preload_index = git_config_bool(var, value);
881 return 0;
882 }
883
348df166
JS
884 if (!strcmp(var, "core.createobject")) {
885 if (!strcmp(value, "rename"))
886 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
887 else if (!strcmp(value, "link"))
888 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
889 else
8262aaa2 890 die(_("invalid mode for object creation: %s"), value);
be66a6c4
JS
891 return 0;
892 }
893
08aefc9e
NTND
894 if (!strcmp(var, "core.sparsecheckout")) {
895 core_apply_sparse_checkout = git_config_bool(var, value);
896 return 0;
897 }
898
76759c7d
TB
899 if (!strcmp(var, "core.precomposeunicode")) {
900 precomposed_unicode = git_config_bool(var, value);
901 return 0;
902 }
903
a42643aa
JK
904 if (!strcmp(var, "core.protecthfs")) {
905 protect_hfs = git_config_bool(var, value);
906 return 0;
907 }
908
2b4c6efc
JS
909 if (!strcmp(var, "core.protectntfs")) {
910 protect_ntfs = git_config_bool(var, value);
911 return 0;
76759c7d
TB
912 }
913
806e2ad7
LT
914 /* Add other config variables here and to Documentation/config.txt. */
915 return 0;
916}
917
1141f492 918static int git_default_i18n_config(const char *var, const char *value)
d1364529 919{
ea5105a5
CC
920 if (!strcmp(var, "i18n.commitencoding"))
921 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 922
ea5105a5
CC
923 if (!strcmp(var, "i18n.logoutputencoding"))
924 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 925
1141f492
LT
926 /* Add other config variables here and to Documentation/config.txt. */
927 return 0;
928}
039bc64e 929
1141f492
LT
930static int git_default_branch_config(const char *var, const char *value)
931{
9ed36cfa
JS
932 if (!strcmp(var, "branch.autosetupmerge")) {
933 if (value && !strcasecmp(value, "always")) {
934 git_branch_track = BRANCH_TRACK_ALWAYS;
935 return 0;
936 }
937 git_branch_track = git_config_bool(var, value);
938 return 0;
939 }
c998ae9b
DS
940 if (!strcmp(var, "branch.autosetuprebase")) {
941 if (!value)
942 return config_error_nonbool(var);
943 else if (!strcmp(value, "never"))
944 autorebase = AUTOREBASE_NEVER;
945 else if (!strcmp(value, "local"))
946 autorebase = AUTOREBASE_LOCAL;
947 else if (!strcmp(value, "remote"))
948 autorebase = AUTOREBASE_REMOTE;
949 else if (!strcmp(value, "always"))
950 autorebase = AUTOREBASE_ALWAYS;
951 else
952 return error("Malformed value for %s", var);
953 return 0;
954 }
a9cc857a 955
1ab661dd 956 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
957 return 0;
958}
959
52153747
FAG
960static int git_default_push_config(const char *var, const char *value)
961{
962 if (!strcmp(var, "push.default")) {
963 if (!value)
964 return config_error_nonbool(var);
965 else if (!strcmp(value, "nothing"))
966 push_default = PUSH_DEFAULT_NOTHING;
967 else if (!strcmp(value, "matching"))
968 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
969 else if (!strcmp(value, "simple"))
970 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
971 else if (!strcmp(value, "upstream"))
972 push_default = PUSH_DEFAULT_UPSTREAM;
973 else if (!strcmp(value, "tracking")) /* deprecated */
974 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
975 else if (!strcmp(value, "current"))
976 push_default = PUSH_DEFAULT_CURRENT;
977 else {
978 error("Malformed value for %s: %s", var, value);
b55e6775
MM
979 return error("Must be one of nothing, matching, simple, "
980 "upstream or current.");
52153747
FAG
981 }
982 return 0;
983 }
984
985 /* Add other config variables here and to Documentation/config.txt. */
986 return 0;
987}
988
d551a488
MSO
989static int git_default_mailmap_config(const char *var, const char *value)
990{
991 if (!strcmp(var, "mailmap.file"))
9352fd57 992 return git_config_pathname(&git_mailmap_file, var, value);
08610900
JK
993 if (!strcmp(var, "mailmap.blob"))
994 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
995
996 /* Add other config variables here and to Documentation/config.txt. */
997 return 0;
998}
999
1141f492
LT
1000int git_default_config(const char *var, const char *value, void *dummy)
1001{
59556548 1002 if (starts_with(var, "core."))
1141f492
LT
1003 return git_default_core_config(var, value);
1004
59556548 1005 if (starts_with(var, "user."))
9597921b 1006 return git_ident_config(var, value, dummy);
1141f492 1007
59556548 1008 if (starts_with(var, "i18n."))
1141f492
LT
1009 return git_default_i18n_config(var, value);
1010
59556548 1011 if (starts_with(var, "branch."))
1141f492
LT
1012 return git_default_branch_config(var, value);
1013
59556548 1014 if (starts_with(var, "push."))
52153747
FAG
1015 return git_default_push_config(var, value);
1016
59556548 1017 if (starts_with(var, "mailmap."))
d551a488
MSO
1018 return git_default_mailmap_config(var, value);
1019
59556548 1020 if (starts_with(var, "advice."))
75194438
JK
1021 return git_default_advice_config(var, value);
1022
1141f492
LT
1023 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1024 pager_use_color = git_config_bool(var,value);
1025 return 0;
1026 }
1027
568508e7
JH
1028 if (!strcmp(var, "pack.packsizelimit")) {
1029 pack_size_limit_cfg = git_config_ulong(var, value);
1030 return 0;
1031 }
1141f492
LT
1032 /* Add other config variables here and to Documentation/config.txt. */
1033 return 0;
1034}
1035
ca4b5de2 1036/*
b2dc0945 1037 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 1038 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
1039 * this function.
1040 */
4d8dd149 1041static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
1042{
1043 int ret;
1044
1045 /* push config-file parsing state stack */
1046 top->prev = cf;
1047 top->linenr = 1;
1048 top->eof = 0;
1049 strbuf_init(&top->value, 1024);
1050 strbuf_init(&top->var, 1024);
1051 cf = top;
1052
4d8dd149 1053 ret = git_parse_source(fn, data);
ca4b5de2
HV
1054
1055 /* pop config-file parsing state stack */
1056 strbuf_release(&top->value);
1057 strbuf_release(&top->var);
1058 cf = top->prev;
1059
1060 return ret;
1061}
1062
3caec73b
KS
1063static int do_config_from_file(config_fn_t fn,
1064 const char *name, const char *path, FILE *f, void *data)
17712991 1065{
3caec73b 1066 struct config_source top;
17712991 1067
3caec73b
KS
1068 top.u.file = f;
1069 top.name = name;
1070 top.path = path;
1071 top.die_on_error = 1;
1072 top.do_fgetc = config_file_fgetc;
1073 top.do_ungetc = config_file_ungetc;
1074 top.do_ftell = config_file_ftell;
924aaf3e 1075
3caec73b
KS
1076 return do_config_from(&top, fn, data);
1077}
924aaf3e 1078
3caec73b
KS
1079static int git_config_from_stdin(config_fn_t fn, void *data)
1080{
1081 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1082}
1083
1084int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1085{
1086 int ret = -1;
1087 FILE *f;
924aaf3e 1088
3caec73b
KS
1089 f = fopen(filename, "r");
1090 if (f) {
260d408e 1091 flockfile(f);
3caec73b 1092 ret = do_config_from_file(fn, filename, filename, f, data);
260d408e 1093 funlockfile(f);
17712991
LT
1094 fclose(f);
1095 }
1096 return ret;
1097}
10bea152 1098
7454ee3c 1099int git_config_from_mem(config_fn_t fn, const char *name, const char *buf,
1bc88819
HV
1100 size_t len, void *data)
1101{
1102 struct config_source top;
1103
1104 top.u.buf.buf = buf;
1105 top.u.buf.len = len;
1106 top.u.buf.pos = 0;
1107 top.name = name;
d14d4244 1108 top.path = NULL;
b2dc0945 1109 top.die_on_error = 0;
49d6cfa5
JK
1110 top.do_fgetc = config_buf_fgetc;
1111 top.do_ungetc = config_buf_ungetc;
1112 top.do_ftell = config_buf_ftell;
1bc88819
HV
1113
1114 return do_config_from(&top, fn, data);
1115}
1116
1117static int git_config_from_blob_sha1(config_fn_t fn,
1118 const char *name,
1119 const unsigned char *sha1,
1120 void *data)
1121{
1122 enum object_type type;
1123 char *buf;
1124 unsigned long size;
1125 int ret;
1126
1127 buf = read_sha1_file(sha1, &type, &size);
1128 if (!buf)
1129 return error("unable to load config blob object '%s'", name);
1130 if (type != OBJ_BLOB) {
1131 free(buf);
1132 return error("reference '%s' does not point to a blob", name);
1133 }
1134
7454ee3c 1135 ret = git_config_from_mem(fn, name, buf, size, data);
1bc88819
HV
1136 free(buf);
1137
1138 return ret;
1139}
1140
1141static int git_config_from_blob_ref(config_fn_t fn,
1142 const char *name,
1143 void *data)
1144{
1145 unsigned char sha1[20];
1146
1147 if (get_sha1(name, sha1) < 0)
1148 return error("unable to resolve config blob '%s'", name);
1149 return git_config_from_blob_sha1(fn, name, sha1, data);
1150}
1151
506b17b1
JS
1152const char *git_etc_gitconfig(void)
1153{
7f0e39fa 1154 static const char *system_wide;
2de9de5e
SP
1155 if (!system_wide)
1156 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1157 return system_wide;
506b17b1
JS
1158}
1159
23b0c478
SP
1160/*
1161 * Parse environment variable 'k' as a boolean (in various
1162 * possible spellings); if missing, use the default value 'def'.
1163 */
0ef37164 1164int git_env_bool(const char *k, int def)
ab88c363
JK
1165{
1166 const char *v = getenv(k);
1167 return v ? git_config_bool(k, v) : def;
1168}
1169
23b0c478
SP
1170/*
1171 * Parse environment variable 'k' as ulong with possibly a unit
1172 * suffix; if missing, use the default value 'val'.
1173 */
1174unsigned long git_env_ulong(const char *k, unsigned long val)
1175{
1176 const char *v = getenv(k);
1177 if (v && !git_parse_ulong(v, &val))
1178 die("failed to parse %s", k);
1179 return val;
1180}
1181
ab88c363
JK
1182int git_config_system(void)
1183{
1184 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1185}
1186
dbdf5854 1187int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1188{
aa387407 1189 int ret = 0, found = 0;
509adc33
PT
1190 char *xdg_config = xdg_config_home("config");
1191 char *user_config = expand_user_path("~/.gitconfig");
5f1a63e0 1192
4698c8fe 1193 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1194 ret += git_config_from_file(fn, git_etc_gitconfig(),
1195 data);
aa387407
FC
1196 found += 1;
1197 }
5f1a63e0 1198
4698c8fe 1199 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1200 ret += git_config_from_file(fn, xdg_config, data);
1201 found += 1;
1202 }
1203
4698c8fe 1204 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1205 ret += git_config_from_file(fn, user_config, data);
1206 found += 1;
5f1a63e0
JS
1207 }
1208
4698c8fe 1209 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1210 ret += git_config_from_file(fn, repo_config, data);
1211 found += 1;
1212 }
8b1fa778 1213
5a0c9eeb
JK
1214 switch (git_config_from_parameters(fn, data)) {
1215 case -1: /* error */
8262aaa2 1216 die(_("unable to parse command-line config"));
5a0c9eeb
JK
1217 break;
1218 case 0: /* found nothing */
1219 break;
1220 default: /* found at least one item */
1221 found++;
1222 break;
1223 }
8b1fa778 1224
21cf3227
HKNN
1225 free(xdg_config);
1226 free(user_config);
1f2baa78 1227 return ret == 0 ? found : ret;
4f629539
JH
1228}
1229
c9b5e2a5 1230int git_config_with_options(config_fn_t fn, void *data,
c8985ce0 1231 struct git_config_source *config_source,
1bc88819 1232 int respect_includes)
dbdf5854
NTND
1233{
1234 char *repo_config = NULL;
1235 int ret;
9b25a0b5
JK
1236 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1237
1238 if (respect_includes) {
1239 inc.fn = fn;
1240 inc.data = data;
1241 fn = git_config_include;
1242 data = &inc;
1243 }
dbdf5854 1244
c9b5e2a5
JK
1245 /*
1246 * If we have a specific filename, use it. Otherwise, follow the
1247 * regular lookup sequence.
1248 */
3caec73b
KS
1249 if (config_source && config_source->use_stdin)
1250 return git_config_from_stdin(fn, data);
1251 else if (config_source && config_source->file)
c8985ce0
KS
1252 return git_config_from_file(fn, config_source->file, data);
1253 else if (config_source && config_source->blob)
1254 return git_config_from_blob_ref(fn, config_source->blob, data);
c9b5e2a5 1255
dbdf5854
NTND
1256 repo_config = git_pathdup("config");
1257 ret = git_config_early(fn, data, repo_config);
1258 if (repo_config)
1259 free(repo_config);
1260 return ret;
1261}
1262
155ef25f 1263static void git_config_raw(config_fn_t fn, void *data)
c9b5e2a5 1264{
aace4385
TA
1265 if (git_config_with_options(fn, data, NULL, 1) < 0)
1266 /*
1267 * git_config_with_options() normally returns only
1268 * positive values, as most errors are fatal, and
1269 * non-fatal potential errors are guarded by "if"
1270 * statements that are entered only when no error is
1271 * possible.
1272 *
1273 * If we ever encounter a non-fatal error, it means
1274 * something went really wrong and we should stop
1275 * immediately.
1276 */
1277 die(_("unknown error occured while reading the configuration files"));
c9b5e2a5
JK
1278}
1279
155ef25f 1280static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
c9b5e2a5 1281{
155ef25f
TA
1282 int i, value_index;
1283 struct string_list *values;
1284 struct config_set_element *entry;
1285 struct configset_list *list = &cs->list;
1286 struct key_value_info *kv_info;
1287
1288 for (i = 0; i < list->nr; i++) {
1289 entry = list->items[i].e;
1290 value_index = list->items[i].value_index;
1291 values = &entry->value_list;
1292 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1293 kv_info = values->items[value_index].util;
1294 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1295 }
1296 }
1297}
1298
1299static void git_config_check_init(void);
1300
1301void git_config(config_fn_t fn, void *data)
1302{
1303 git_config_check_init();
1304 configset_iter(&the_config_set, fn, data);
c9b5e2a5
JK
1305}
1306
3c8687a7
TA
1307static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1308{
1309 struct config_set_element k;
1310 struct config_set_element *found_entry;
1311 char *normalized_key;
1312 int ret;
1313 /*
1314 * `key` may come from the user, so normalize it before using it
1315 * for querying entries from the hashmap.
1316 */
1317 ret = git_config_parse_key(key, &normalized_key, NULL);
1318
1319 if (ret)
1320 return NULL;
1321
1322 hashmap_entry_init(&k, strhash(normalized_key));
1323 k.key = normalized_key;
1324 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1325 free(normalized_key);
1326 return found_entry;
1327}
1328
1329static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1330{
1331 struct config_set_element *e;
3df8fd62 1332 struct string_list_item *si;
155ef25f 1333 struct configset_list_item *l_item;
3df8fd62
TA
1334 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1335
3c8687a7
TA
1336 e = configset_find_element(cs, key);
1337 /*
1338 * Since the keys are being fed by git_config*() callback mechanism, they
1339 * are already normalized. So simply add them without any further munging.
1340 */
1341 if (!e) {
1342 e = xmalloc(sizeof(*e));
1343 hashmap_entry_init(e, strhash(key));
1344 e->key = xstrdup(key);
1345 string_list_init(&e->value_list, 1);
1346 hashmap_add(&cs->config_hash, e);
1347 }
8c53f071 1348 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
155ef25f
TA
1349
1350 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1351 l_item = &cs->list.items[cs->list.nr++];
1352 l_item->e = e;
1353 l_item->value_index = e->value_list.nr - 1;
1354
3df8fd62
TA
1355 if (cf) {
1356 kv_info->filename = strintern(cf->name);
1357 kv_info->linenr = cf->linenr;
1358 } else {
1359 /* for values read from `git_config_from_parameters()` */
1360 kv_info->filename = NULL;
1361 kv_info->linenr = -1;
1362 }
1363 si->util = kv_info;
3c8687a7
TA
1364
1365 return 0;
1366}
1367
1368static int config_set_element_cmp(const struct config_set_element *e1,
1369 const struct config_set_element *e2, const void *unused)
1370{
1371 return strcmp(e1->key, e2->key);
1372}
1373
1374void git_configset_init(struct config_set *cs)
1375{
1376 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1377 cs->hash_initialized = 1;
155ef25f
TA
1378 cs->list.nr = 0;
1379 cs->list.alloc = 0;
1380 cs->list.items = NULL;
3c8687a7
TA
1381}
1382
1383void git_configset_clear(struct config_set *cs)
1384{
1385 struct config_set_element *entry;
1386 struct hashmap_iter iter;
1387 if (!cs->hash_initialized)
1388 return;
1389
1390 hashmap_iter_init(&cs->config_hash, &iter);
1391 while ((entry = hashmap_iter_next(&iter))) {
1392 free(entry->key);
3df8fd62 1393 string_list_clear(&entry->value_list, 1);
3c8687a7
TA
1394 }
1395 hashmap_free(&cs->config_hash, 1);
1396 cs->hash_initialized = 0;
155ef25f
TA
1397 free(cs->list.items);
1398 cs->list.nr = 0;
1399 cs->list.alloc = 0;
1400 cs->list.items = NULL;
3c8687a7
TA
1401}
1402
1403static int config_set_callback(const char *key, const char *value, void *cb)
1404{
1405 struct config_set *cs = cb;
1406 configset_add_value(cs, key, value);
1407 return 0;
1408}
1409
1410int git_configset_add_file(struct config_set *cs, const char *filename)
1411{
1412 return git_config_from_file(config_set_callback, filename, cs);
1413}
1414
1415int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1416{
1417 const struct string_list *values = NULL;
1418 /*
1419 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1420 * queried key in the files of the configset, the value returned will be the last
1421 * value in the value list for that key.
1422 */
1423 values = git_configset_get_value_multi(cs, key);
1424
1425 if (!values)
1426 return 1;
1427 assert(values->nr > 0);
1428 *value = values->items[values->nr - 1].string;
1429 return 0;
1430}
1431
1432const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1433{
1434 struct config_set_element *e = configset_find_element(cs, key);
1435 return e ? &e->value_list : NULL;
1436}
1437
1438int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1439{
1440 const char *value;
1441 if (!git_configset_get_value(cs, key, &value))
1442 return git_config_string(dest, key, value);
1443 else
1444 return 1;
1445}
1446
1447int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1448{
1449 return git_configset_get_string_const(cs, key, (const char **)dest);
1450}
1451
1452int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1453{
1454 const char *value;
1455 if (!git_configset_get_value(cs, key, &value)) {
1456 *dest = git_config_int(key, value);
1457 return 0;
1458 } else
1459 return 1;
1460}
1461
1462int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1463{
1464 const char *value;
1465 if (!git_configset_get_value(cs, key, &value)) {
1466 *dest = git_config_ulong(key, value);
1467 return 0;
1468 } else
1469 return 1;
1470}
1471
1472int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1473{
1474 const char *value;
1475 if (!git_configset_get_value(cs, key, &value)) {
1476 *dest = git_config_bool(key, value);
1477 return 0;
1478 } else
1479 return 1;
1480}
1481
1482int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1483 int *is_bool, int *dest)
1484{
1485 const char *value;
1486 if (!git_configset_get_value(cs, key, &value)) {
1487 *dest = git_config_bool_or_int(key, value, is_bool);
1488 return 0;
1489 } else
1490 return 1;
1491}
1492
1493int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1494{
1495 const char *value;
1496 if (!git_configset_get_value(cs, key, &value)) {
1497 *dest = git_config_maybe_bool(key, value);
1498 if (*dest == -1)
1499 return -1;
1500 return 0;
1501 } else
1502 return 1;
1503}
1504
1505int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1506{
1507 const char *value;
1508 if (!git_configset_get_value(cs, key, &value))
1509 return git_config_pathname(dest, key, value);
1510 else
1511 return 1;
1512}
1513
1514static void git_config_check_init(void)
1515{
1516 if (the_config_set.hash_initialized)
1517 return;
1518 git_configset_init(&the_config_set);
155ef25f 1519 git_config_raw(config_set_callback, &the_config_set);
3c8687a7
TA
1520}
1521
1522void git_config_clear(void)
1523{
1524 if (!the_config_set.hash_initialized)
1525 return;
1526 git_configset_clear(&the_config_set);
1527}
1528
1529int git_config_get_value(const char *key, const char **value)
1530{
1531 git_config_check_init();
1532 return git_configset_get_value(&the_config_set, key, value);
1533}
1534
1535const struct string_list *git_config_get_value_multi(const char *key)
1536{
1537 git_config_check_init();
1538 return git_configset_get_value_multi(&the_config_set, key);
1539}
1540
1541int git_config_get_string_const(const char *key, const char **dest)
1542{
5a80e97c 1543 int ret;
3c8687a7 1544 git_config_check_init();
5a80e97c
TA
1545 ret = git_configset_get_string_const(&the_config_set, key, dest);
1546 if (ret < 0)
1547 git_die_config(key, NULL);
1548 return ret;
3c8687a7
TA
1549}
1550
1551int git_config_get_string(const char *key, char **dest)
1552{
1553 git_config_check_init();
1554 return git_config_get_string_const(key, (const char **)dest);
1555}
1556
1557int git_config_get_int(const char *key, int *dest)
1558{
1559 git_config_check_init();
1560 return git_configset_get_int(&the_config_set, key, dest);
1561}
1562
1563int git_config_get_ulong(const char *key, unsigned long *dest)
1564{
1565 git_config_check_init();
1566 return git_configset_get_ulong(&the_config_set, key, dest);
1567}
1568
1569int git_config_get_bool(const char *key, int *dest)
1570{
1571 git_config_check_init();
1572 return git_configset_get_bool(&the_config_set, key, dest);
1573}
1574
1575int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1576{
1577 git_config_check_init();
1578 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1579}
1580
1581int git_config_get_maybe_bool(const char *key, int *dest)
1582{
1583 git_config_check_init();
1584 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1585}
1586
1587int git_config_get_pathname(const char *key, const char **dest)
1588{
5a80e97c 1589 int ret;
3c8687a7 1590 git_config_check_init();
5a80e97c
TA
1591 ret = git_configset_get_pathname(&the_config_set, key, dest);
1592 if (ret < 0)
1593 git_die_config(key, NULL);
1594 return ret;
1595}
1596
1597NORETURN
1598void git_die_config_linenr(const char *key, const char *filename, int linenr)
1599{
1600 if (!filename)
1601 die(_("unable to parse '%s' from command-line config"), key);
1602 else
1603 die(_("bad config variable '%s' in file '%s' at line %d"),
1604 key, filename, linenr);
1605}
1606
1607NORETURN __attribute__((format(printf, 2, 3)))
1608void git_die_config(const char *key, const char *err, ...)
1609{
1610 const struct string_list *values;
1611 struct key_value_info *kv_info;
1612
1613 if (err) {
1614 va_list params;
1615 va_start(params, err);
1616 vreportf("error: ", err, params);
1617 va_end(params);
1618 }
1619 values = git_config_get_value_multi(key);
1620 kv_info = values->items[values->nr - 1].util;
1621 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
3c8687a7
TA
1622}
1623
10bea152
JS
1624/*
1625 * Find all the stuff for git_config_set() below.
1626 */
4ddba79d 1627
10bea152
JS
1628static struct {
1629 int baselen;
4b25d091 1630 char *key;
f98d863d 1631 int do_not_match;
4b25d091 1632 regex_t *value_regex;
4ddba79d 1633 int multi_replace;
83786fa4
TR
1634 size_t *offset;
1635 unsigned int offset_alloc;
10bea152
JS
1636 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1637 int seen;
1638} store;
1639
4b25d091 1640static int matches(const char *key, const char *value)
f98d863d 1641{
c1063be2
JK
1642 if (strcmp(key, store.key))
1643 return 0; /* not ours */
1644 if (!store.value_regex)
1645 return 1; /* always matches */
1646 if (store.value_regex == CONFIG_REGEX_NONE)
1647 return 0; /* never matches */
1648
1649 return store.do_not_match ^
1650 (value && !regexec(store.value_regex, value, 0, NULL, 0));
f98d863d
JS
1651}
1652
4b25d091 1653static int store_aux(const char *key, const char *value, void *cb)
10bea152 1654{
ae9ee41d
JH
1655 const char *ep;
1656 size_t section_len;
1657
10bea152
JS
1658 switch (store.state) {
1659 case KEY_SEEN:
f98d863d 1660 if (matches(key, value)) {
4ddba79d 1661 if (store.seen == 1 && store.multi_replace == 0) {
8262aaa2 1662 warning(_("%s has multiple values"), key);
10bea152 1663 }
4ddba79d 1664
83786fa4
TR
1665 ALLOC_GROW(store.offset, store.seen + 1,
1666 store.offset_alloc);
1667
49d6cfa5 1668 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1669 store.seen++;
1670 }
1671 break;
1672 case SECTION_SEEN:
ae9ee41d
JH
1673 /*
1674 * What we are looking for is in store.key (both
1675 * section and var), and its section part is baselen
1676 * long. We found key (again, both section and var).
1677 * We would want to know if this key is in the same
1678 * section as what we are looking for. We already
1679 * know we are in the same section as what should
1680 * hold store.key.
1681 */
1682 ep = strrchr(key, '.');
1683 section_len = ep - key;
1684
1685 if ((section_len != store.baselen) ||
1686 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1687 store.state = SECTION_END_SEEN;
1688 break;
ae9ee41d
JH
1689 }
1690
1691 /*
1692 * Do not increment matches: this is no match, but we
1693 * just made sure we are in the desired section.
1694 */
83786fa4
TR
1695 ALLOC_GROW(store.offset, store.seen + 1,
1696 store.offset_alloc);
49d6cfa5 1697 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1698 /* fallthru */
1699 case SECTION_END_SEEN:
1700 case START:
f98d863d 1701 if (matches(key, value)) {
83786fa4
TR
1702 ALLOC_GROW(store.offset, store.seen + 1,
1703 store.offset_alloc);
49d6cfa5 1704 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1705 store.state = KEY_SEEN;
1706 store.seen++;
d14f7764
LT
1707 } else {
1708 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1709 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1710 store.state = SECTION_SEEN;
83786fa4
TR
1711 ALLOC_GROW(store.offset,
1712 store.seen + 1,
1713 store.offset_alloc);
49d6cfa5 1714 store.offset[store.seen] = cf->do_ftell(cf);
d14f7764 1715 }
bdf0ef08 1716 }
10bea152
JS
1717 }
1718 return 0;
1719}
1720
64c0d71c 1721static int write_error(const char *filename)
480c9e52 1722{
64c0d71c 1723 error("failed to write new configuration file %s", filename);
480c9e52
AW
1724
1725 /* Same error code as "failed to rename". */
1726 return 4;
1727}
1728
4b25d091 1729static int store_write_section(int fd, const char *key)
10bea152 1730{
cb891a59
KH
1731 const char *dot;
1732 int i, success;
f285a2d7 1733 struct strbuf sb = STRBUF_INIT;
d14f7764 1734
cb891a59 1735 dot = memchr(key, '.', store.baselen);
d14f7764 1736 if (dot) {
cb891a59
KH
1737 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1738 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1739 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1740 strbuf_addch(&sb, '\\');
1741 strbuf_addch(&sb, key[i]);
d14f7764 1742 }
cb891a59
KH
1743 strbuf_addstr(&sb, "\"]\n");
1744 } else {
1745 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1746 }
1747
cb891a59
KH
1748 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1749 strbuf_release(&sb);
480c9e52 1750
cb891a59 1751 return success;
10bea152
JS
1752}
1753
4b25d091 1754static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1755{
cb891a59
KH
1756 int i, success;
1757 int length = strlen(key + store.baselen + 1);
1758 const char *quote = "";
f285a2d7 1759 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1760
6281f394
JM
1761 /*
1762 * Check to see if the value needs to be surrounded with a dq pair.
1763 * Note that problematic characters are always backslash-quoted; this
1764 * check is about not losing leading or trailing SP and strings that
1765 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1766 * configuration parser.
1767 */
cdd4fb15 1768 if (value[0] == ' ')
cb891a59 1769 quote = "\"";
cdd4fb15
BG
1770 for (i = 0; value[i]; i++)
1771 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1772 quote = "\"";
1773 if (i && value[i - 1] == ' ')
1774 quote = "\"";
1775
cb891a59
KH
1776 strbuf_addf(&sb, "\t%.*s = %s",
1777 length, key + store.baselen + 1, quote);
10bea152 1778
10bea152
JS
1779 for (i = 0; value[i]; i++)
1780 switch (value[i]) {
480c9e52 1781 case '\n':
cb891a59 1782 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1783 break;
1784 case '\t':
cb891a59 1785 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1786 break;
1787 case '"':
1788 case '\\':
cb891a59 1789 strbuf_addch(&sb, '\\');
480c9e52 1790 default:
cb891a59 1791 strbuf_addch(&sb, value[i]);
480c9e52
AW
1792 break;
1793 }
cb891a59
KH
1794 strbuf_addf(&sb, "%s\n", quote);
1795
1796 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1797 strbuf_release(&sb);
1798
1799 return success;
10bea152
JS
1800}
1801
4b25d091
FC
1802static ssize_t find_beginning_of_line(const char *contents, size_t size,
1803 size_t offset_, int *found_bracket)
4ddba79d 1804{
dc49cd76
SP
1805 size_t equal_offset = size, bracket_offset = size;
1806 ssize_t offset;
4ddba79d 1807
7a31cc0f 1808contline:
a6080a0a 1809 for (offset = offset_-2; offset > 0
4ddba79d
JS
1810 && contents[offset] != '\n'; offset--)
1811 switch (contents[offset]) {
1812 case '=': equal_offset = offset; break;
1813 case ']': bracket_offset = offset; break;
1814 }
7a31cc0f
FL
1815 if (offset > 0 && contents[offset-1] == '\\') {
1816 offset_ = offset;
1817 goto contline;
1818 }
4ddba79d
JS
1819 if (bracket_offset < equal_offset) {
1820 *found_bracket = 1;
1821 offset = bracket_offset+1;
1822 } else
1823 offset++;
1824
1825 return offset;
1826}
1827
5ec31182
RR
1828int git_config_set_in_file(const char *config_filename,
1829 const char *key, const char *value)
1830{
1831 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1832}
1833
4b25d091 1834int git_config_set(const char *key, const char *value)
10bea152 1835{
4ddba79d 1836 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1837}
1838
b09c53a3
LP
1839/*
1840 * Auxiliary function to sanity-check and split the key into the section
1841 * identifier and variable name.
1842 *
1843 * Returns 0 on success, -1 when there is an invalid character in the key and
1844 * -2 if there is no section name in the key.
1845 *
1846 * store_key - pointer to char* which will hold a copy of the key with
1847 * lowercase section and variable name
1848 * baselen - pointer to int which will hold the length of the
1849 * section + subsection part, can be NULL
1850 */
9e9de18f 1851static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
b09c53a3
LP
1852{
1853 int i, dot, baselen;
1854 const char *last_dot = strrchr(key, '.');
1855
1856 /*
1857 * Since "key" actually contains the section name and the real
1858 * key name separated by a dot, we have to know where the dot is.
1859 */
1860
2169ddc0 1861 if (last_dot == NULL || last_dot == key) {
9e9de18f
JK
1862 if (!quiet)
1863 error("key does not contain a section: %s", key);
7a397419 1864 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1865 }
1866
2169ddc0 1867 if (!last_dot[1]) {
9e9de18f
JK
1868 if (!quiet)
1869 error("key does not contain variable name: %s", key);
7a397419 1870 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1871 }
1872
b09c53a3
LP
1873 baselen = last_dot - key;
1874 if (baselen_)
1875 *baselen_ = baselen;
1876
1877 /*
1878 * Validate the key and while at it, lower case it for matching.
1879 */
9e9de18f
JK
1880 if (store_key)
1881 *store_key = xmalloc(strlen(key) + 1);
b09c53a3
LP
1882
1883 dot = 0;
1884 for (i = 0; key[i]; i++) {
1885 unsigned char c = key[i];
1886 if (c == '.')
1887 dot = 1;
1888 /* Leave the extended basename untouched.. */
1889 if (!dot || i > baselen) {
1890 if (!iskeychar(c) ||
1891 (i == baselen + 1 && !isalpha(c))) {
9e9de18f
JK
1892 if (!quiet)
1893 error("invalid key: %s", key);
b09c53a3
LP
1894 goto out_free_ret_1;
1895 }
1896 c = tolower(c);
1897 } else if (c == '\n') {
9e9de18f
JK
1898 if (!quiet)
1899 error("invalid key (newline): %s", key);
b09c53a3
LP
1900 goto out_free_ret_1;
1901 }
9e9de18f
JK
1902 if (store_key)
1903 (*store_key)[i] = c;
b09c53a3 1904 }
9e9de18f
JK
1905 if (store_key)
1906 (*store_key)[i] = 0;
b09c53a3
LP
1907
1908 return 0;
1909
1910out_free_ret_1:
9e9de18f
JK
1911 if (store_key) {
1912 free(*store_key);
1913 *store_key = NULL;
1914 }
7a397419 1915 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1916}
1917
9e9de18f
JK
1918int git_config_parse_key(const char *key, char **store_key, int *baselen)
1919{
1920 return git_config_parse_key_1(key, store_key, baselen, 0);
1921}
1922
1923int git_config_key_is_valid(const char *key)
1924{
1925 return !git_config_parse_key_1(key, NULL, NULL, 1);
1926}
1927
10bea152
JS
1928/*
1929 * If value==NULL, unset in (remove from) config,
1930 * if value_regex!=NULL, disregard key/value pairs where value does not match.
c1063be2
JK
1931 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1932 * (only add a new one)
4ddba79d
JS
1933 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1934 * else all matching key/values (regardless how many) are removed,
1935 * before the new pair is written.
10bea152
JS
1936 *
1937 * Returns 0 on success.
1938 *
1939 * This function does this:
1940 *
1941 * - it locks the config file by creating ".git/config.lock"
1942 *
1943 * - it then parses the config using store_aux() as validator to find
1944 * the position on the key/value pair to replace. If it is to be unset,
1945 * it must be found exactly once.
1946 *
1947 * - the config file is mmap()ed and the part before the match (if any) is
1948 * written to the lock file, then the changed part and the rest.
1949 *
1950 * - the config file is removed and the lock file rename()d to it.
1951 *
1952 */
5ec31182
RR
1953int git_config_set_multivar_in_file(const char *config_filename,
1954 const char *key, const char *value,
1955 const char *value_regex, int multi_replace)
10bea152 1956{
54d160ec 1957 int fd = -1, in_fd = -1;
dafc88b1 1958 int ret;
6cbf973c 1959 struct lock_file *lock = NULL;
0a5f5759 1960 char *filename_buf = NULL;
3a1b3126
JK
1961 char *contents = NULL;
1962 size_t contents_sz;
4ddba79d 1963
b09c53a3
LP
1964 /* parse-key returns negative; flip the sign to feed exit(3) */
1965 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1966 if (ret)
dafc88b1 1967 goto out_free;
b17e659d
JS
1968
1969 store.multi_replace = multi_replace;
10bea152 1970
0a5f5759
JK
1971 if (!config_filename)
1972 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1973
1974 /*
6cbf973c 1975 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1976 * contents of .git/config will be written into it.
1977 */
f1064f6b 1978 lock = xcalloc(1, sizeof(struct lock_file));
6cbf973c
BS
1979 fd = hold_lock_file_for_update(lock, config_filename, 0);
1980 if (fd < 0) {
6ffd567b 1981 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1982 free(store.key);
7a397419 1983 ret = CONFIG_NO_LOCK;
dafc88b1 1984 goto out_free;
10bea152
JS
1985 }
1986
1987 /*
1988 * If .git/config does not exist yet, write a minimal version.
1989 */
88fb958b
AR
1990 in_fd = open(config_filename, O_RDONLY);
1991 if ( in_fd < 0 ) {
10bea152
JS
1992 free(store.key);
1993
88fb958b
AR
1994 if ( ENOENT != errno ) {
1995 error("opening %s: %s", config_filename,
1996 strerror(errno));
7a397419 1997 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1998 goto out_free;
88fb958b 1999 }
10bea152
JS
2000 /* if nothing to unset, error out */
2001 if (value == NULL) {
7a397419 2002 ret = CONFIG_NOTHING_SET;
dafc88b1 2003 goto out_free;
10bea152
JS
2004 }
2005
4b25d091 2006 store.key = (char *)key;
480c9e52 2007 if (!store_write_section(fd, key) ||
93c1e079
JH
2008 !store_write_pair(fd, key, value))
2009 goto write_err_out;
2010 } else {
88fb958b 2011 struct stat st;
3a1b3126 2012 size_t copy_begin, copy_end;
dc49cd76 2013 int i, new_line = 0;
10bea152
JS
2014
2015 if (value_regex == NULL)
2016 store.value_regex = NULL;
c1063be2
JK
2017 else if (value_regex == CONFIG_REGEX_NONE)
2018 store.value_regex = CONFIG_REGEX_NONE;
10bea152 2019 else {
f98d863d
JS
2020 if (value_regex[0] == '!') {
2021 store.do_not_match = 1;
2022 value_regex++;
2023 } else
2024 store.do_not_match = 0;
2025
2d7320d0 2026 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
2027 if (regcomp(store.value_regex, value_regex,
2028 REG_EXTENDED)) {
64c0d71c 2029 error("invalid pattern: %s", value_regex);
10bea152 2030 free(store.value_regex);
7a397419 2031 ret = CONFIG_INVALID_PATTERN;
dafc88b1 2032 goto out_free;
10bea152
JS
2033 }
2034 }
2035
83786fa4 2036 ALLOC_GROW(store.offset, 1, store.offset_alloc);
4ddba79d 2037 store.offset[0] = 0;
10bea152
JS
2038 store.state = START;
2039 store.seen = 0;
2040
2041 /*
2042 * After this, store.offset will contain the *end* offset
2043 * of the last match, or remain at 0 if no match was found.
2044 * As a side effect, we make sure to transform only a valid
2045 * existing config file.
2046 */
ef90d6d4 2047 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 2048 error("invalid config file %s", config_filename);
10bea152 2049 free(store.key);
c1063be2
JK
2050 if (store.value_regex != NULL &&
2051 store.value_regex != CONFIG_REGEX_NONE) {
10bea152
JS
2052 regfree(store.value_regex);
2053 free(store.value_regex);
2054 }
7a397419 2055 ret = CONFIG_INVALID_FILE;
dafc88b1 2056 goto out_free;
10bea152
JS
2057 }
2058
2059 free(store.key);
c1063be2
JK
2060 if (store.value_regex != NULL &&
2061 store.value_regex != CONFIG_REGEX_NONE) {
10bea152
JS
2062 regfree(store.value_regex);
2063 free(store.value_regex);
2064 }
2065
4ddba79d
JS
2066 /* if nothing to unset, or too many matches, error out */
2067 if ((store.seen == 0 && value == NULL) ||
2068 (store.seen > 1 && multi_replace == 0)) {
7a397419 2069 ret = CONFIG_NOTHING_SET;
dafc88b1 2070 goto out_free;
10bea152
JS
2071 }
2072
88fb958b 2073 fstat(in_fd, &st);
dc49cd76 2074 contents_sz = xsize_t(st.st_size);
1570856b
JK
2075 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2076 MAP_PRIVATE, in_fd, 0);
2077 if (contents == MAP_FAILED) {
0e8771f1
JK
2078 if (errno == ENODEV && S_ISDIR(st.st_mode))
2079 errno = EISDIR;
1570856b
JK
2080 error("unable to mmap '%s': %s",
2081 config_filename, strerror(errno));
2082 ret = CONFIG_INVALID_FILE;
2083 contents = NULL;
2084 goto out_free;
2085 }
10bea152 2086 close(in_fd);
54d160ec 2087 in_fd = -1;
10bea152 2088
b4fb09e4 2089 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2569d239 2090 error("chmod on %s failed: %s",
b4fb09e4 2091 get_lock_file_path(lock), strerror(errno));
daa22c6f
EW
2092 ret = CONFIG_NO_WRITE;
2093 goto out_free;
2094 }
2095
4ddba79d
JS
2096 if (store.seen == 0)
2097 store.seen = 1;
2098
2099 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2100 if (store.offset[i] == 0) {
dc49cd76 2101 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
2102 } else if (store.state != KEY_SEEN) {
2103 copy_end = store.offset[i];
10bea152 2104 } else
4ddba79d 2105 copy_end = find_beginning_of_line(
dc49cd76 2106 contents, contents_sz,
4ddba79d
JS
2107 store.offset[i]-2, &new_line);
2108
02e5ba4a
JK
2109 if (copy_end > 0 && contents[copy_end-1] != '\n')
2110 new_line = 1;
2111
4ddba79d
JS
2112 /* write the first part of the config */
2113 if (copy_end > copy_begin) {
93c1e079
JH
2114 if (write_in_full(fd, contents + copy_begin,
2115 copy_end - copy_begin) <
2116 copy_end - copy_begin)
2117 goto write_err_out;
2118 if (new_line &&
2b7ca830 2119 write_str_in_full(fd, "\n") != 1)
93c1e079 2120 goto write_err_out;
4ddba79d
JS
2121 }
2122 copy_begin = store.offset[i];
10bea152
JS
2123 }
2124
10bea152
JS
2125 /* write the pair (value == NULL means unset) */
2126 if (value != NULL) {
93c1e079
JH
2127 if (store.state == START) {
2128 if (!store_write_section(fd, key))
2129 goto write_err_out;
480c9e52 2130 }
93c1e079
JH
2131 if (!store_write_pair(fd, key, value))
2132 goto write_err_out;
10bea152
JS
2133 }
2134
2135 /* write the rest of the config */
dc49cd76 2136 if (copy_begin < contents_sz)
93c1e079 2137 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
2138 contents_sz - copy_begin) <
2139 contents_sz - copy_begin)
93c1e079 2140 goto write_err_out;
7a64592c
KB
2141
2142 munmap(contents, contents_sz);
2143 contents = NULL;
10bea152
JS
2144 }
2145
4ed7cd3a 2146 if (commit_lock_file(lock) < 0) {
08a3651f
SG
2147 error("could not write config file %s: %s", config_filename,
2148 strerror(errno));
7a397419 2149 ret = CONFIG_NO_WRITE;
e831855e 2150 lock = NULL;
dafc88b1 2151 goto out_free;
10bea152
JS
2152 }
2153
6cbf973c
BS
2154 /*
2155 * lock is committed, so don't try to roll it back below.
2156 * NOTE: Since lockfile.c keeps a linked list of all created
2157 * lock_file structures, it isn't safe to free(lock). It's
2158 * better to just leave it hanging around.
2159 */
2160 lock = NULL;
dafc88b1
SH
2161 ret = 0;
2162
3c8687a7
TA
2163 /* Invalidate the config cache */
2164 git_config_clear();
2165
dafc88b1 2166out_free:
6cbf973c
BS
2167 if (lock)
2168 rollback_lock_file(lock);
0a5f5759 2169 free(filename_buf);
3a1b3126
JK
2170 if (contents)
2171 munmap(contents, contents_sz);
54d160ec
SS
2172 if (in_fd >= 0)
2173 close(in_fd);
dafc88b1 2174 return ret;
93c1e079
JH
2175
2176write_err_out:
b4fb09e4 2177 ret = write_error(get_lock_file_path(lock));
93c1e079
JH
2178 goto out_free;
2179
10bea152
JS
2180}
2181
5ec31182
RR
2182int git_config_set_multivar(const char *key, const char *value,
2183 const char *value_regex, int multi_replace)
2184{
4a7bb5ba 2185 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 2186 multi_replace);
5ec31182
RR
2187}
2188
118f8b24
PB
2189static int section_name_match (const char *buf, const char *name)
2190{
2191 int i = 0, j = 0, dot = 0;
a4c0d463
AV
2192 if (buf[i] != '[')
2193 return 0;
2194 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
2195 if (!dot && isspace(buf[i])) {
2196 dot = 1;
2197 if (name[j++] != '.')
2198 break;
2199 for (i++; isspace(buf[i]); i++)
2200 ; /* do nothing */
2201 if (buf[i] != '"')
2202 break;
2203 continue;
2204 }
2205 if (buf[i] == '\\' && dot)
2206 i++;
2207 else if (buf[i] == '"' && dot) {
2208 for (i++; isspace(buf[i]); i++)
2209 ; /* do_nothing */
2210 break;
2211 }
2212 if (buf[i] != name[j++])
2213 break;
2214 }
a4c0d463
AV
2215 if (buf[i] == ']' && name[j] == 0) {
2216 /*
2217 * We match, now just find the right length offset by
2218 * gobbling up any whitespace after it, as well
2219 */
2220 i++;
2221 for (; buf[i] && isspace(buf[i]); i++)
2222 ; /* do nothing */
2223 return i;
2224 }
2225 return 0;
118f8b24
PB
2226}
2227
94a35b1a
JK
2228static int section_name_is_ok(const char *name)
2229{
2230 /* Empty section names are bogus. */
2231 if (!*name)
2232 return 0;
2233
2234 /*
2235 * Before a dot, we must be alphanumeric or dash. After the first dot,
2236 * anything goes, so we can stop checking.
2237 */
2238 for (; *name && *name != '.'; name++)
2239 if (*name != '-' && !isalnum(*name))
2240 return 0;
2241 return 1;
2242}
2243
118f8b24 2244/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
2245int git_config_rename_section_in_file(const char *config_filename,
2246 const char *old_name, const char *new_name)
0667fcfb 2247{
118f8b24 2248 int ret = 0, remove = 0;
42bd39b5 2249 char *filename_buf = NULL;
94a35b1a 2250 struct lock_file *lock;
0667fcfb
JS
2251 int out_fd;
2252 char buf[1024];
924aaf3e 2253 FILE *config_file;
daa22c6f 2254 struct stat st;
0667fcfb 2255
94a35b1a
JK
2256 if (new_name && !section_name_is_ok(new_name)) {
2257 ret = error("invalid section name: %s", new_name);
2258 goto out;
2259 }
2260
42bd39b5
JK
2261 if (!config_filename)
2262 config_filename = filename_buf = git_pathdup("config");
2263
f1064f6b 2264 lock = xcalloc(1, sizeof(struct lock_file));
0667fcfb 2265 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 2266 if (out_fd < 0) {
64c0d71c 2267 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
2268 goto out;
2269 }
0667fcfb 2270
fc1905bb 2271 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
2272 /* no config file means nothing to rename, no error */
2273 goto unlock_and_out;
fc1905bb 2274 }
0667fcfb 2275
daa22c6f
EW
2276 fstat(fileno(config_file), &st);
2277
b4fb09e4 2278 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2569d239 2279 ret = error("chmod on %s failed: %s",
b4fb09e4 2280 get_lock_file_path(lock), strerror(errno));
daa22c6f
EW
2281 goto out;
2282 }
2283
0667fcfb
JS
2284 while (fgets(buf, sizeof(buf), config_file)) {
2285 int i;
480c9e52 2286 int length;
9a5abfc7 2287 char *output = buf;
0667fcfb
JS
2288 for (i = 0; buf[i] && isspace(buf[i]); i++)
2289 ; /* do nothing */
2290 if (buf[i] == '[') {
2291 /* it's a section */
a4c0d463
AV
2292 int offset = section_name_match(&buf[i], old_name);
2293 if (offset > 0) {
118f8b24
PB
2294 ret++;
2295 if (new_name == NULL) {
2296 remove = 1;
0667fcfb
JS
2297 continue;
2298 }
0667fcfb 2299 store.baselen = strlen(new_name);
480c9e52 2300 if (!store_write_section(out_fd, new_name)) {
b4fb09e4 2301 ret = write_error(get_lock_file_path(lock));
480c9e52
AW
2302 goto out;
2303 }
9a5abfc7
AV
2304 /*
2305 * We wrote out the new section, with
2306 * a newline, now skip the old
2307 * section's length
2308 */
2309 output += offset + i;
2310 if (strlen(output) > 0) {
2311 /*
2312 * More content means there's
2313 * a declaration to put on the
2314 * next line; indent with a
2315 * tab
2316 */
2317 output -= 1;
2318 output[0] = '\t';
2319 }
0667fcfb 2320 }
118f8b24 2321 remove = 0;
0667fcfb 2322 }
118f8b24
PB
2323 if (remove)
2324 continue;
9a5abfc7
AV
2325 length = strlen(output);
2326 if (write_in_full(out_fd, output, length) != length) {
b4fb09e4 2327 ret = write_error(get_lock_file_path(lock));
480c9e52
AW
2328 goto out;
2329 }
0667fcfb 2330 }
fc1905bb 2331 fclose(config_file);
8b590075 2332unlock_and_out:
4ed7cd3a 2333 if (commit_lock_file(lock) < 0)
08a3651f
SG
2334 ret = error("could not write config file %s: %s",
2335 config_filename, strerror(errno));
8b590075 2336out:
42bd39b5 2337 free(filename_buf);
0667fcfb
JS
2338 return ret;
2339}
40ea4ed9 2340
42bd39b5
JK
2341int git_config_rename_section(const char *old_name, const char *new_name)
2342{
4a7bb5ba 2343 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
2344}
2345
40ea4ed9
JH
2346/*
2347 * Call this to report error for your variable that should not
2348 * get a boolean value (i.e. "[my] var" means "true").
2349 */
a469a101 2350#undef config_error_nonbool
40ea4ed9
JH
2351int config_error_nonbool(const char *var)
2352{
2353 return error("Missing value for '%s'", var);
2354}
1b86bbb0
JK
2355
2356int parse_config_key(const char *var,
2357 const char *section,
2358 const char **subsection, int *subsection_len,
2359 const char **key)
2360{
2361 int section_len = strlen(section);
2362 const char *dot;
2363
2364 /* Does it start with "section." ? */
59556548 2365 if (!starts_with(var, section) || var[section_len] != '.')
1b86bbb0
JK
2366 return -1;
2367
2368 /*
2369 * Find the key; we don't know yet if we have a subsection, but we must
2370 * parse backwards from the end, since the subsection may have dots in
2371 * it, too.
2372 */
2373 dot = strrchr(var, '.');
2374 *key = dot + 1;
2375
2376 /* Did we have a subsection at all? */
2377 if (dot == var + section_len) {
2378 *subsection = NULL;
2379 *subsection_len = 0;
2380 }
2381 else {
2382 *subsection = var + section_len + 1;
2383 *subsection_len = dot - *subsection;
2384 }
2385
2386 return 0;
2387}