config: set up config_source for command-line config
[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;
473166b9 27 const char *origin_type;
924aaf3e 28 const char *name;
d14d4244 29 const char *path;
b2dc0945 30 int die_on_error;
924aaf3e
RJ
31 int linenr;
32 int eof;
33 struct strbuf value;
0971e992 34 struct strbuf var;
924aaf3e 35
49d6cfa5
JK
36 int (*do_fgetc)(struct config_source *c);
37 int (*do_ungetc)(int c, struct config_source *conf);
38 long (*do_ftell)(struct config_source *c);
4d8dd149
HV
39};
40
41static struct config_source *cf;
924aaf3e 42
960ccca6
DH
43static int zlib_compression_seen;
44
3c8687a7
TA
45/*
46 * Default config_set that contains key-value pairs from the usual set of config
47 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
48 * config file and the global /etc/gitconfig)
49 */
50static struct config_set the_config_set;
51
4d8dd149
HV
52static int config_file_fgetc(struct config_source *conf)
53{
260d408e 54 return getc_unlocked(conf->u.file);
4d8dd149
HV
55}
56
57static int config_file_ungetc(int c, struct config_source *conf)
58{
59 return ungetc(c, conf->u.file);
60}
61
62static long config_file_ftell(struct config_source *conf)
63{
64 return ftell(conf->u.file);
65}
66
1bc88819
HV
67
68static int config_buf_fgetc(struct config_source *conf)
69{
70 if (conf->u.buf.pos < conf->u.buf.len)
71 return conf->u.buf.buf[conf->u.buf.pos++];
72
73 return EOF;
74}
75
76static int config_buf_ungetc(int c, struct config_source *conf)
77{
1d0655c1
JK
78 if (conf->u.buf.pos > 0) {
79 conf->u.buf.pos--;
80 if (conf->u.buf.buf[conf->u.buf.pos] != c)
81 die("BUG: config_buf can only ungetc the same character");
82 return c;
83 }
1bc88819
HV
84
85 return EOF;
86}
87
88static long config_buf_ftell(struct config_source *conf)
89{
90 return conf->u.buf.pos;
91}
92
9b25a0b5
JK
93#define MAX_INCLUDE_DEPTH 10
94static const char include_depth_advice[] =
95"exceeded maximum include depth (%d) while including\n"
96" %s\n"
97"from\n"
98" %s\n"
99"Do you have circular includes?";
100static int handle_path_include(const char *path, struct config_include_data *inc)
101{
102 int ret = 0;
103 struct strbuf buf = STRBUF_INIT;
67beb600 104 char *expanded;
4c0a89fc 105
67beb600
JK
106 if (!path)
107 return config_error_nonbool("include.path");
108
109 expanded = expand_user_path(path);
4c0a89fc 110 if (!expanded)
8c3ca351 111 return error("could not expand include path '%s'", path);
4c0a89fc 112 path = expanded;
9b25a0b5
JK
113
114 /*
115 * Use an absolute path as-is, but interpret relative paths
116 * based on the including config file.
117 */
118 if (!is_absolute_path(path)) {
119 char *slash;
120
d14d4244 121 if (!cf || !cf->path)
9b25a0b5
JK
122 return error("relative config includes must come from files");
123
d14d4244 124 slash = find_last_dir_sep(cf->path);
9b25a0b5 125 if (slash)
d14d4244 126 strbuf_add(&buf, cf->path, slash - cf->path + 1);
9b25a0b5
JK
127 strbuf_addstr(&buf, path);
128 path = buf.buf;
129 }
130
4698c8fe 131 if (!access_or_die(path, R_OK, 0)) {
9b25a0b5
JK
132 if (++inc->depth > MAX_INCLUDE_DEPTH)
133 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
3258258f
JK
134 !cf ? "<unknown>" :
135 cf->name ? cf->name :
136 "the command line");
9b25a0b5
JK
137 ret = git_config_from_file(git_config_include, path, inc);
138 inc->depth--;
139 }
140 strbuf_release(&buf);
4c0a89fc 141 free(expanded);
9b25a0b5
JK
142 return ret;
143}
144
145int git_config_include(const char *var, const char *value, void *data)
146{
147 struct config_include_data *inc = data;
9b25a0b5
JK
148 int ret;
149
150 /*
151 * Pass along all values, including "include" directives; this makes it
152 * possible to query information on the includes themselves.
153 */
154 ret = inc->fn(var, value, inc->data);
155 if (ret < 0)
156 return ret;
157
37007c3a 158 if (!strcmp(var, "include.path"))
9b25a0b5
JK
159 ret = handle_path_include(value, inc);
160 return ret;
161}
162
2b64fc89
JK
163void git_config_push_parameter(const char *text)
164{
165 struct strbuf env = STRBUF_INIT;
166 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
d1f88498 167 if (old && *old) {
2b64fc89
JK
168 strbuf_addstr(&env, old);
169 strbuf_addch(&env, ' ');
170 }
171 sq_quote_buf(&env, text);
172 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
173 strbuf_release(&env);
174}
175
2496844b
JK
176int git_config_parse_parameter(const char *text,
177 config_fn_t fn, void *data)
8b1fa778 178{
a789ca70 179 const char *value;
572e4f6a 180 struct strbuf **pair;
a789ca70 181
f77bccae 182 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
183 if (!pair[0])
184 return error("bogus config parameter: %s", text);
a789ca70
JH
185
186 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
572e4f6a 187 strbuf_setlen(pair[0], pair[0]->len - 1);
a789ca70
JH
188 value = pair[1] ? pair[1]->buf : "";
189 } else {
190 value = NULL;
191 }
192
572e4f6a
AR
193 strbuf_trim(pair[0]);
194 if (!pair[0]->len) {
195 strbuf_list_free(pair);
06eb708f 196 return error("bogus config parameter: %s", text);
8b1fa778 197 }
ffb20ce1 198 strbuf_tolower(pair[0]);
a789ca70 199 if (fn(pair[0]->buf, value, data) < 0) {
06eb708f
JK
200 strbuf_list_free(pair);
201 return -1;
572e4f6a
AR
202 }
203 strbuf_list_free(pair);
8b1fa778
AR
204 return 0;
205}
206
06eb708f
JK
207int git_config_from_parameters(config_fn_t fn, void *data)
208{
2b64fc89 209 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
a77d6db6 210 int ret = 0;
2b64fc89
JK
211 char *envw;
212 const char **argv = NULL;
213 int nr = 0, alloc = 0;
214 int i;
3258258f 215 struct config_source source;
2b64fc89
JK
216
217 if (!env)
218 return 0;
3258258f
JK
219
220 memset(&source, 0, sizeof(source));
221 source.prev = cf;
222 cf = &source;
223
2b64fc89
JK
224 /* sq_dequote will write over it */
225 envw = xstrdup(env);
226
227 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
a77d6db6
JK
228 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
229 goto out;
2b64fc89
JK
230 }
231
232 for (i = 0; i < nr; i++) {
06eb708f 233 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
a77d6db6
JK
234 ret = -1;
235 goto out;
2b64fc89
JK
236 }
237 }
238
a77d6db6 239out:
2b64fc89
JK
240 free(argv);
241 free(envw);
3258258f 242 cf = source.prev;
a77d6db6 243 return ret;
2b64fc89
JK
244}
245
17712991
LT
246static int get_next_char(void)
247{
49d6cfa5 248 int c = cf->do_fgetc(cf);
17712991 249
dbb9a812
HV
250 if (c == '\r') {
251 /* DOS like systems */
49d6cfa5 252 c = cf->do_fgetc(cf);
dbb9a812 253 if (c != '\n') {
5e0be134
JK
254 if (c != EOF)
255 cf->do_ungetc(c, cf);
dbb9a812 256 c = '\r';
17712991
LT
257 }
258 }
dbb9a812
HV
259 if (c == '\n')
260 cf->linenr++;
261 if (c == EOF) {
262 cf->eof = 1;
b3b3f60b 263 cf->linenr++;
dbb9a812
HV
264 c = '\n';
265 }
17712991
LT
266 return c;
267}
268
269static char *parse_value(void)
270{
e96c19c5 271 int quote = 0, comment = 0, space = 0;
17712991 272
924aaf3e 273 strbuf_reset(&cf->value);
17712991
LT
274 for (;;) {
275 int c = get_next_char();
17712991 276 if (c == '\n') {
4b340593
MS
277 if (quote) {
278 cf->linenr--;
17712991 279 return NULL;
4b340593 280 }
924aaf3e 281 return cf->value.buf;
17712991
LT
282 }
283 if (comment)
284 continue;
285 if (isspace(c) && !quote) {
924aaf3e 286 if (cf->value.len)
ebdaae37 287 space++;
17712991
LT
288 continue;
289 }
7ebdba61
JS
290 if (!quote) {
291 if (c == ';' || c == '#') {
292 comment = 1;
293 continue;
294 }
295 }
ebdaae37 296 for (; space; space--)
924aaf3e 297 strbuf_addch(&cf->value, ' ');
17712991
LT
298 if (c == '\\') {
299 c = get_next_char();
300 switch (c) {
301 case '\n':
302 continue;
303 case 't':
304 c = '\t';
305 break;
306 case 'b':
307 c = '\b';
308 break;
309 case 'n':
310 c = '\n';
311 break;
5cbb401d
LT
312 /* Some characters escape as themselves */
313 case '\\': case '"':
314 break;
315 /* Reject unknown escape sequences */
316 default:
317 return NULL;
17712991 318 }
924aaf3e 319 strbuf_addch(&cf->value, c);
17712991
LT
320 continue;
321 }
322 if (c == '"') {
323 quote = 1-quote;
324 continue;
325 }
924aaf3e 326 strbuf_addch(&cf->value, c);
17712991
LT
327 }
328}
329
38c5afa8
LT
330static inline int iskeychar(int c)
331{
332 return isalnum(c) || c == '-';
333}
334
0971e992 335static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
336{
337 int c;
338 char *value;
b3b3f60b 339 int ret;
17712991
LT
340
341 /* Get the full name */
342 for (;;) {
343 c = get_next_char();
924aaf3e 344 if (cf->eof)
17712991 345 break;
38c5afa8 346 if (!iskeychar(c))
17712991 347 break;
0971e992 348 strbuf_addch(name, tolower(c));
17712991 349 }
0971e992 350
17712991
LT
351 while (c == ' ' || c == '\t')
352 c = get_next_char();
353
354 value = NULL;
355 if (c != '\n') {
356 if (c != '=')
357 return -1;
358 value = parse_value();
359 if (!value)
360 return -1;
361 }
b3b3f60b
MM
362 /*
363 * We already consumed the \n, but we need linenr to point to
364 * the line we just parsed during the call to fn to get
365 * accurate line number in error messages.
366 */
367 cf->linenr--;
368 ret = fn(name->buf, value, data);
369 cf->linenr++;
370 return ret;
17712991
LT
371}
372
0971e992 373static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
374{
375 do {
376 if (c == '\n')
4b340593 377 goto error_incomplete_line;
d14f7764
LT
378 c = get_next_char();
379 } while (isspace(c));
380
381 /* We require the format to be '[base "extension"]' */
382 if (c != '"')
383 return -1;
0971e992 384 strbuf_addch(name, '.');
d14f7764
LT
385
386 for (;;) {
387 int c = get_next_char();
388 if (c == '\n')
4b340593 389 goto error_incomplete_line;
d14f7764
LT
390 if (c == '"')
391 break;
392 if (c == '\\') {
393 c = get_next_char();
394 if (c == '\n')
4b340593 395 goto error_incomplete_line;
d14f7764 396 }
0971e992 397 strbuf_addch(name, c);
d14f7764
LT
398 }
399
400 /* Final ']' */
401 if (get_next_char() != ']')
402 return -1;
0971e992 403 return 0;
4b340593
MS
404error_incomplete_line:
405 cf->linenr--;
406 return -1;
d14f7764
LT
407}
408
0971e992 409static int get_base_var(struct strbuf *name)
17712991 410{
17712991
LT
411 for (;;) {
412 int c = get_next_char();
924aaf3e 413 if (cf->eof)
17712991
LT
414 return -1;
415 if (c == ']')
0971e992 416 return 0;
d14f7764 417 if (isspace(c))
0971e992 418 return get_extended_base_var(name, c);
38c5afa8 419 if (!iskeychar(c) && c != '.')
17712991 420 return -1;
0971e992 421 strbuf_addch(name, tolower(c));
17712991
LT
422 }
423}
424
4d8dd149 425static int git_parse_source(config_fn_t fn, void *data)
17712991
LT
426{
427 int comment = 0;
428 int baselen = 0;
0971e992 429 struct strbuf *var = &cf->var;
17712991 430
de056402 431 /* U+FEFF Byte Order Mark in UTF8 */
599446dc 432 const char *bomptr = utf8_bom;
de056402 433
17712991
LT
434 for (;;) {
435 int c = get_next_char();
de056402
PB
436 if (bomptr && *bomptr) {
437 /* We are at the file beginning; skip UTF8-encoded BOM
438 * if present. Sane editors won't put this in on their
439 * own, but e.g. Windows Notepad will do it happily. */
599446dc 440 if (c == (*bomptr & 0377)) {
de056402
PB
441 bomptr++;
442 continue;
443 } else {
444 /* Do not tolerate partial BOM. */
445 if (bomptr != utf8_bom)
446 break;
447 /* No BOM at file beginning. Cool. */
448 bomptr = NULL;
449 }
450 }
17712991 451 if (c == '\n') {
924aaf3e 452 if (cf->eof)
17712991
LT
453 return 0;
454 comment = 0;
455 continue;
456 }
457 if (comment || isspace(c))
458 continue;
459 if (c == '#' || c == ';') {
460 comment = 1;
461 continue;
462 }
463 if (c == '[') {
0971e992
BW
464 /* Reset prior to determining a new stem */
465 strbuf_reset(var);
466 if (get_base_var(var) < 0 || var->len < 1)
17712991 467 break;
0971e992
BW
468 strbuf_addch(var, '.');
469 baselen = var->len;
17712991
LT
470 continue;
471 }
472 if (!isalpha(c))
473 break;
0971e992
BW
474 /*
475 * Truncate the var name back to the section header
476 * stem prior to grabbing the suffix part of the name
477 * and the value.
478 */
479 strbuf_setlen(var, baselen);
480 strbuf_addch(var, tolower(c));
481 if (get_value(fn, data, var) < 0)
17712991
LT
482 break;
483 }
b2dc0945 484 if (cf->die_on_error)
473166b9 485 die(_("bad config line %d in %s %s"), cf->linenr, cf->origin_type, cf->name);
b2dc0945 486 else
473166b9 487 return error(_("bad config line %d in %s %s"), cf->linenr, cf->origin_type, cf->name);
17712991
LT
488}
489
ebaa1bd4 490static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
491{
492 if (!*end)
493 return 1;
c8deb5a1
SP
494 else if (!strcasecmp(end, "k")) {
495 *val *= 1024;
496 return 1;
497 }
498 else if (!strcasecmp(end, "m")) {
499 *val *= 1024 * 1024;
500 return 1;
501 }
502 else if (!strcasecmp(end, "g")) {
503 *val *= 1024 * 1024 * 1024;
504 return 1;
505 }
506 return 0;
0b87b6e0
BD
507}
508
7192777d 509static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
0b87b6e0
BD
510{
511 if (value && *value) {
512 char *end;
ebaa1bd4
NA
513 intmax_t val;
514 uintmax_t uval;
515 uintmax_t factor = 1;
516
517 errno = 0;
518 val = strtoimax(value, &end, 0);
519 if (errno == ERANGE)
520 return 0;
33fdd77e
JK
521 if (!parse_unit_factor(end, &factor)) {
522 errno = EINVAL;
c8deb5a1 523 return 0;
33fdd77e 524 }
83915ba5 525 uval = labs(val);
ebaa1bd4 526 uval *= factor;
83915ba5 527 if (uval > max || labs(val) > uval) {
33fdd77e 528 errno = ERANGE;
ebaa1bd4 529 return 0;
33fdd77e 530 }
ebaa1bd4
NA
531 val *= factor;
532 *ret = val;
0b87b6e0
BD
533 return 1;
534 }
33fdd77e 535 errno = EINVAL;
0b87b6e0
BD
536 return 0;
537}
538
0b4dc661 539static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
17712991
LT
540{
541 if (value && *value) {
542 char *end;
ebaa1bd4
NA
543 uintmax_t val;
544 uintmax_t oldval;
545
546 errno = 0;
547 val = strtoumax(value, &end, 0);
548 if (errno == ERANGE)
549 return 0;
550 oldval = val;
33fdd77e
JK
551 if (!parse_unit_factor(end, &val)) {
552 errno = EINVAL;
c8deb5a1 553 return 0;
33fdd77e
JK
554 }
555 if (val > max || oldval > val) {
556 errno = ERANGE;
ebaa1bd4 557 return 0;
33fdd77e 558 }
c8deb5a1 559 *ret = val;
0b87b6e0 560 return 1;
17712991 561 }
33fdd77e 562 errno = EINVAL;
0b87b6e0
BD
563 return 0;
564}
565
42d194e9 566static int git_parse_int(const char *value, int *ret)
c1867cea 567{
7192777d 568 intmax_t tmp;
42d194e9 569 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
7192777d
JK
570 return 0;
571 *ret = tmp;
572 return 1;
573}
574
00160242
JK
575static int git_parse_int64(const char *value, int64_t *ret)
576{
577 intmax_t tmp;
578 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
579 return 0;
580 *ret = tmp;
581 return 1;
582}
583
7192777d
JK
584int git_parse_ulong(const char *value, unsigned long *ret)
585{
586 uintmax_t tmp;
587 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
588 return 0;
589 *ret = tmp;
590 return 1;
591}
592
06bdc23b 593NORETURN
2f666581 594static void die_bad_number(const char *name, const char *value)
c1867cea 595{
2f666581
JK
596 const char *reason = errno == ERANGE ?
597 "out of range" :
598 "invalid unit";
599 if (!value)
600 value = "";
601
473166b9
LS
602 if (cf && cf->origin_type && cf->name)
603 die(_("bad numeric config value '%s' for '%s' in %s %s: %s"),
604 value, name, cf->origin_type, cf->name, reason);
8262aaa2 605 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
c1867cea
JK
606}
607
0b87b6e0
BD
608int git_config_int(const char *name, const char *value)
609{
42d194e9
JK
610 int ret;
611 if (!git_parse_int(value, &ret))
2f666581 612 die_bad_number(name, value);
0b87b6e0
BD
613 return ret;
614}
615
00160242
JK
616int64_t git_config_int64(const char *name, const char *value)
617{
618 int64_t ret;
619 if (!git_parse_int64(value, &ret))
620 die_bad_number(name, value);
0b87b6e0
BD
621 return ret;
622}
623
624unsigned long git_config_ulong(const char *name, const char *value)
625{
626 unsigned long ret;
627 if (!git_parse_ulong(value, &ret))
2f666581 628 die_bad_number(name, value);
0b87b6e0 629 return ret;
17712991
LT
630}
631
9a549d43 632int git_parse_maybe_bool(const char *value)
17712991
LT
633{
634 if (!value)
635 return 1;
636 if (!*value)
637 return 0;
8420ccd8
JH
638 if (!strcasecmp(value, "true")
639 || !strcasecmp(value, "yes")
640 || !strcasecmp(value, "on"))
17712991 641 return 1;
8420ccd8
JH
642 if (!strcasecmp(value, "false")
643 || !strcasecmp(value, "no")
644 || !strcasecmp(value, "off"))
17712991 645 return 0;
8420ccd8
JH
646 return -1;
647}
648
b2be2f6a
JK
649int git_config_maybe_bool(const char *name, const char *value)
650{
9a549d43 651 int v = git_parse_maybe_bool(value);
b2be2f6a
JK
652 if (0 <= v)
653 return v;
42d194e9 654 if (git_parse_int(value, &v))
db6195ef 655 return !!v;
b2be2f6a
JK
656 return -1;
657}
658
8420ccd8
JH
659int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
660{
9a549d43 661 int v = git_parse_maybe_bool(value);
8420ccd8
JH
662 if (0 <= v) {
663 *is_bool = 1;
664 return v;
665 }
a53f2ec6 666 *is_bool = 0;
c35b0b58 667 return git_config_int(name, value);
17712991
LT
668}
669
a53f2ec6
JH
670int git_config_bool(const char *name, const char *value)
671{
672 int discard;
c35b0b58 673 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
674}
675
ea5105a5
CC
676int git_config_string(const char **dest, const char *var, const char *value)
677{
678 if (!value)
679 return config_error_nonbool(var);
680 *dest = xstrdup(value);
681 return 0;
682}
683
395de250
MM
684int git_config_pathname(const char **dest, const char *var, const char *value)
685{
686 if (!value)
687 return config_error_nonbool(var);
688 *dest = expand_user_path(value);
689 if (!*dest)
8262aaa2 690 die(_("failed to expand user dir in: '%s'"), value);
395de250
MM
691 return 0;
692}
693
806e2ad7 694static int git_default_core_config(const char *var, const char *value)
17712991
LT
695{
696 /* This needs a better name */
697 if (!strcmp(var, "core.filemode")) {
698 trust_executable_bit = git_config_bool(var, value);
699 return 0;
700 }
1ce4790b
AR
701 if (!strcmp(var, "core.trustctime")) {
702 trust_ctime = git_config_bool(var, value);
703 return 0;
704 }
c1b5d738 705 if (!strcmp(var, "core.checkstat")) {
c08e4d5b
RR
706 if (!strcasecmp(value, "default"))
707 check_stat = 1;
708 else if (!strcasecmp(value, "minimal"))
709 check_stat = 0;
710 }
17712991 711
9378c161
JH
712 if (!strcmp(var, "core.quotepath")) {
713 quote_path_fully = git_config_bool(var, value);
714 return 0;
715 }
716
78a8d641
JS
717 if (!strcmp(var, "core.symlinks")) {
718 has_symlinks = git_config_bool(var, value);
719 return 0;
720 }
721
0a9b88b7
LT
722 if (!strcmp(var, "core.ignorecase")) {
723 ignore_case = git_config_bool(var, value);
724 return 0;
725 }
726
64589a03
JH
727 if (!strcmp(var, "core.attributesfile"))
728 return git_config_pathname(&git_attributes_file, var, value);
729
867ad08a
ÆAB
730 if (!strcmp(var, "core.hookspath"))
731 return git_config_pathname(&git_hooks_path, var, value);
732
7d1864ce
JH
733 if (!strcmp(var, "core.bare")) {
734 is_bare_repository_cfg = git_config_bool(var, value);
735 return 0;
736 }
737
5f73076c
JH
738 if (!strcmp(var, "core.ignorestat")) {
739 assume_unchanged = git_config_bool(var, value);
740 return 0;
741 }
742
e388c738
JH
743 if (!strcmp(var, "core.prefersymlinkrefs")) {
744 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
745 return 0;
746 }
747
6de08ae6
SP
748 if (!strcmp(var, "core.logallrefupdates")) {
749 log_all_ref_updates = git_config_bool(var, value);
750 return 0;
751 }
752
2f8acdb3
JH
753 if (!strcmp(var, "core.warnambiguousrefs")) {
754 warn_ambiguous_refs = git_config_bool(var, value);
755 return 0;
756 }
757
a71f09fe 758 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
759 int abbrev = git_config_int(var, value);
760 if (abbrev < minimum_abbrev || abbrev > 40)
761 return -1;
762 default_abbrev = abbrev;
763 return 0;
764 }
765
960ccca6 766 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
767 int level = git_config_int(var, value);
768 if (level == -1)
769 level = Z_DEFAULT_COMPRESSION;
770 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 771 die(_("bad zlib compression level %d"), level);
12f6c308 772 zlib_compression_level = level;
960ccca6
DH
773 zlib_compression_seen = 1;
774 return 0;
775 }
776
777 if (!strcmp(var, "core.compression")) {
778 int level = git_config_int(var, value);
779 if (level == -1)
780 level = Z_DEFAULT_COMPRESSION;
781 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 782 die(_("bad zlib compression level %d"), level);
960ccca6
DH
783 core_compression_level = level;
784 core_compression_seen = 1;
785 if (!zlib_compression_seen)
786 zlib_compression_level = level;
12f6c308
JBH
787 return 0;
788 }
789
60bb8b14 790 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 791 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 792 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
793
794 /* This value must be multiple of (pagesize * 2) */
795 packed_git_window_size /= pgsz_x2;
796 if (packed_git_window_size < 1)
797 packed_git_window_size = 1;
798 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
799 return 0;
800 }
801
15366280 802 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 803 big_file_threshold = git_config_ulong(var, value);
15366280
JH
804 return 0;
805 }
806
77ccc5bb 807 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 808 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
809 return 0;
810 }
811
18bdec11 812 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 813 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
814 return 0;
815 }
816
6c510bee 817 if (!strcmp(var, "core.autocrlf")) {
d7f46334 818 if (value && !strcasecmp(value, "input")) {
fd6cce9e 819 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
820 return 0;
821 }
6c510bee
LT
822 auto_crlf = git_config_bool(var, value);
823 return 0;
824 }
825
21e5ad50
SP
826 if (!strcmp(var, "core.safecrlf")) {
827 if (value && !strcasecmp(value, "warn")) {
828 safe_crlf = SAFE_CRLF_WARN;
829 return 0;
830 }
831 safe_crlf = git_config_bool(var, value);
832 return 0;
833 }
834
942e7747
EB
835 if (!strcmp(var, "core.eol")) {
836 if (value && !strcasecmp(value, "lf"))
ec70f52f 837 core_eol = EOL_LF;
942e7747 838 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 839 core_eol = EOL_CRLF;
942e7747 840 else if (value && !strcasecmp(value, "native"))
ec70f52f 841 core_eol = EOL_NATIVE;
942e7747 842 else
ec70f52f 843 core_eol = EOL_UNSET;
942e7747
EB
844 return 0;
845 }
846
a97a7468
JS
847 if (!strcmp(var, "core.notesref")) {
848 notes_ref_name = xstrdup(value);
849 return 0;
850 }
851
806e2ad7
LT
852 if (!strcmp(var, "core.pager"))
853 return git_config_string(&pager_program, var, value);
854
855 if (!strcmp(var, "core.editor"))
856 return git_config_string(&editor_program, var, value);
857
eff80a9f 858 if (!strcmp(var, "core.commentchar")) {
649409b7
JK
859 if (!value)
860 return config_error_nonbool(var);
ad524f83 861 else if (!strcasecmp(value, "auto"))
84c9dc2c 862 auto_comment_line_char = 1;
ad524f83 863 else if (value[0] && !value[1]) {
649409b7 864 comment_line_char = value[0];
84c9dc2c 865 auto_comment_line_char = 0;
50b54fd7
NTND
866 } else
867 return error("core.commentChar should only be one character");
868 return 0;
eff80a9f
JH
869 }
870
d3e7da89
AK
871 if (!strcmp(var, "core.askpass"))
872 return git_config_string(&askpass_program, var, value);
873
806e2ad7 874 if (!strcmp(var, "core.excludesfile"))
395de250 875 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
876
877 if (!strcmp(var, "core.whitespace")) {
878 if (!value)
879 return config_error_nonbool(var);
880 whitespace_rule_cfg = parse_whitespace_rule(value);
881 return 0;
882 }
883
aafe9fba
LT
884 if (!strcmp(var, "core.fsyncobjectfiles")) {
885 fsync_object_files = git_config_bool(var, value);
886 return 0;
887 }
888
671c9b7e
LT
889 if (!strcmp(var, "core.preloadindex")) {
890 core_preload_index = git_config_bool(var, value);
891 return 0;
892 }
893
348df166
JS
894 if (!strcmp(var, "core.createobject")) {
895 if (!strcmp(value, "rename"))
896 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
897 else if (!strcmp(value, "link"))
898 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
899 else
8262aaa2 900 die(_("invalid mode for object creation: %s"), value);
be66a6c4
JS
901 return 0;
902 }
903
08aefc9e
NTND
904 if (!strcmp(var, "core.sparsecheckout")) {
905 core_apply_sparse_checkout = git_config_bool(var, value);
906 return 0;
907 }
908
76759c7d
TB
909 if (!strcmp(var, "core.precomposeunicode")) {
910 precomposed_unicode = git_config_bool(var, value);
911 return 0;
912 }
913
a42643aa
JK
914 if (!strcmp(var, "core.protecthfs")) {
915 protect_hfs = git_config_bool(var, value);
916 return 0;
917 }
918
2b4c6efc
JS
919 if (!strcmp(var, "core.protectntfs")) {
920 protect_ntfs = git_config_bool(var, value);
921 return 0;
76759c7d
TB
922 }
923
f30afdab
JS
924 if (!strcmp(var, "core.hidedotfiles")) {
925 if (value && !strcasecmp(value, "dotgitonly"))
926 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
927 else
928 hide_dotfiles = git_config_bool(var, value);
929 return 0;
930 }
931
806e2ad7
LT
932 /* Add other config variables here and to Documentation/config.txt. */
933 return 0;
934}
935
1141f492 936static int git_default_i18n_config(const char *var, const char *value)
d1364529 937{
ea5105a5
CC
938 if (!strcmp(var, "i18n.commitencoding"))
939 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 940
ea5105a5
CC
941 if (!strcmp(var, "i18n.logoutputencoding"))
942 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 943
1141f492
LT
944 /* Add other config variables here and to Documentation/config.txt. */
945 return 0;
946}
039bc64e 947
1141f492
LT
948static int git_default_branch_config(const char *var, const char *value)
949{
9ed36cfa
JS
950 if (!strcmp(var, "branch.autosetupmerge")) {
951 if (value && !strcasecmp(value, "always")) {
952 git_branch_track = BRANCH_TRACK_ALWAYS;
953 return 0;
954 }
955 git_branch_track = git_config_bool(var, value);
956 return 0;
957 }
c998ae9b
DS
958 if (!strcmp(var, "branch.autosetuprebase")) {
959 if (!value)
960 return config_error_nonbool(var);
961 else if (!strcmp(value, "never"))
962 autorebase = AUTOREBASE_NEVER;
963 else if (!strcmp(value, "local"))
964 autorebase = AUTOREBASE_LOCAL;
965 else if (!strcmp(value, "remote"))
966 autorebase = AUTOREBASE_REMOTE;
967 else if (!strcmp(value, "always"))
968 autorebase = AUTOREBASE_ALWAYS;
969 else
8c3ca351 970 return error("malformed value for %s", var);
c998ae9b
DS
971 return 0;
972 }
a9cc857a 973
1ab661dd 974 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
975 return 0;
976}
977
52153747
FAG
978static int git_default_push_config(const char *var, const char *value)
979{
980 if (!strcmp(var, "push.default")) {
981 if (!value)
982 return config_error_nonbool(var);
983 else if (!strcmp(value, "nothing"))
984 push_default = PUSH_DEFAULT_NOTHING;
985 else if (!strcmp(value, "matching"))
986 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
987 else if (!strcmp(value, "simple"))
988 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
989 else if (!strcmp(value, "upstream"))
990 push_default = PUSH_DEFAULT_UPSTREAM;
991 else if (!strcmp(value, "tracking")) /* deprecated */
992 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
993 else if (!strcmp(value, "current"))
994 push_default = PUSH_DEFAULT_CURRENT;
995 else {
8c3ca351 996 error("malformed value for %s: %s", var, value);
b55e6775
MM
997 return error("Must be one of nothing, matching, simple, "
998 "upstream or current.");
52153747
FAG
999 }
1000 return 0;
1001 }
1002
1003 /* Add other config variables here and to Documentation/config.txt. */
1004 return 0;
1005}
1006
d551a488
MSO
1007static int git_default_mailmap_config(const char *var, const char *value)
1008{
1009 if (!strcmp(var, "mailmap.file"))
9352fd57 1010 return git_config_pathname(&git_mailmap_file, var, value);
08610900
JK
1011 if (!strcmp(var, "mailmap.blob"))
1012 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
1013
1014 /* Add other config variables here and to Documentation/config.txt. */
1015 return 0;
1016}
1017
1141f492
LT
1018int git_default_config(const char *var, const char *value, void *dummy)
1019{
59556548 1020 if (starts_with(var, "core."))
1141f492
LT
1021 return git_default_core_config(var, value);
1022
59556548 1023 if (starts_with(var, "user."))
9597921b 1024 return git_ident_config(var, value, dummy);
1141f492 1025
59556548 1026 if (starts_with(var, "i18n."))
1141f492
LT
1027 return git_default_i18n_config(var, value);
1028
59556548 1029 if (starts_with(var, "branch."))
1141f492
LT
1030 return git_default_branch_config(var, value);
1031
59556548 1032 if (starts_with(var, "push."))
52153747
FAG
1033 return git_default_push_config(var, value);
1034
59556548 1035 if (starts_with(var, "mailmap."))
d551a488
MSO
1036 return git_default_mailmap_config(var, value);
1037
59556548 1038 if (starts_with(var, "advice."))
75194438
JK
1039 return git_default_advice_config(var, value);
1040
1141f492
LT
1041 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1042 pager_use_color = git_config_bool(var,value);
1043 return 0;
1044 }
1045
568508e7
JH
1046 if (!strcmp(var, "pack.packsizelimit")) {
1047 pack_size_limit_cfg = git_config_ulong(var, value);
1048 return 0;
1049 }
1141f492
LT
1050 /* Add other config variables here and to Documentation/config.txt. */
1051 return 0;
1052}
1053
ca4b5de2 1054/*
b2dc0945 1055 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 1056 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
1057 * this function.
1058 */
4d8dd149 1059static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
1060{
1061 int ret;
1062
1063 /* push config-file parsing state stack */
1064 top->prev = cf;
1065 top->linenr = 1;
1066 top->eof = 0;
1067 strbuf_init(&top->value, 1024);
1068 strbuf_init(&top->var, 1024);
1069 cf = top;
1070
4d8dd149 1071 ret = git_parse_source(fn, data);
ca4b5de2
HV
1072
1073 /* pop config-file parsing state stack */
1074 strbuf_release(&top->value);
1075 strbuf_release(&top->var);
1076 cf = top->prev;
1077
1078 return ret;
1079}
1080
3caec73b 1081static int do_config_from_file(config_fn_t fn,
473166b9
LS
1082 const char *origin_type, const char *name, const char *path, FILE *f,
1083 void *data)
17712991 1084{
3caec73b 1085 struct config_source top;
17712991 1086
3caec73b 1087 top.u.file = f;
473166b9 1088 top.origin_type = origin_type;
3caec73b
KS
1089 top.name = name;
1090 top.path = path;
1091 top.die_on_error = 1;
1092 top.do_fgetc = config_file_fgetc;
1093 top.do_ungetc = config_file_ungetc;
1094 top.do_ftell = config_file_ftell;
924aaf3e 1095
3caec73b
KS
1096 return do_config_from(&top, fn, data);
1097}
924aaf3e 1098
3caec73b
KS
1099static int git_config_from_stdin(config_fn_t fn, void *data)
1100{
473166b9 1101 return do_config_from_file(fn, "standard input", "", NULL, stdin, data);
3caec73b
KS
1102}
1103
1104int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1105{
1106 int ret = -1;
1107 FILE *f;
924aaf3e 1108
3caec73b
KS
1109 f = fopen(filename, "r");
1110 if (f) {
260d408e 1111 flockfile(f);
473166b9 1112 ret = do_config_from_file(fn, "file", filename, filename, f, data);
260d408e 1113 funlockfile(f);
17712991
LT
1114 fclose(f);
1115 }
1116 return ret;
1117}
10bea152 1118
473166b9
LS
1119int git_config_from_mem(config_fn_t fn, const char *origin_type,
1120 const char *name, const char *buf, size_t len, void *data)
1bc88819
HV
1121{
1122 struct config_source top;
1123
1124 top.u.buf.buf = buf;
1125 top.u.buf.len = len;
1126 top.u.buf.pos = 0;
473166b9 1127 top.origin_type = origin_type;
1bc88819 1128 top.name = name;
d14d4244 1129 top.path = NULL;
b2dc0945 1130 top.die_on_error = 0;
49d6cfa5
JK
1131 top.do_fgetc = config_buf_fgetc;
1132 top.do_ungetc = config_buf_ungetc;
1133 top.do_ftell = config_buf_ftell;
1bc88819
HV
1134
1135 return do_config_from(&top, fn, data);
1136}
1137
1138static int git_config_from_blob_sha1(config_fn_t fn,
1139 const char *name,
1140 const unsigned char *sha1,
1141 void *data)
1142{
1143 enum object_type type;
1144 char *buf;
1145 unsigned long size;
1146 int ret;
1147
1148 buf = read_sha1_file(sha1, &type, &size);
1149 if (!buf)
1150 return error("unable to load config blob object '%s'", name);
1151 if (type != OBJ_BLOB) {
1152 free(buf);
1153 return error("reference '%s' does not point to a blob", name);
1154 }
1155
473166b9 1156 ret = git_config_from_mem(fn, "blob", name, buf, size, data);
1bc88819
HV
1157 free(buf);
1158
1159 return ret;
1160}
1161
1162static int git_config_from_blob_ref(config_fn_t fn,
1163 const char *name,
1164 void *data)
1165{
1166 unsigned char sha1[20];
1167
1168 if (get_sha1(name, sha1) < 0)
1169 return error("unable to resolve config blob '%s'", name);
1170 return git_config_from_blob_sha1(fn, name, sha1, data);
1171}
1172
506b17b1
JS
1173const char *git_etc_gitconfig(void)
1174{
7f0e39fa 1175 static const char *system_wide;
2de9de5e
SP
1176 if (!system_wide)
1177 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1178 return system_wide;
506b17b1
JS
1179}
1180
23b0c478
SP
1181/*
1182 * Parse environment variable 'k' as a boolean (in various
1183 * possible spellings); if missing, use the default value 'def'.
1184 */
0ef37164 1185int git_env_bool(const char *k, int def)
ab88c363
JK
1186{
1187 const char *v = getenv(k);
1188 return v ? git_config_bool(k, v) : def;
1189}
1190
23b0c478
SP
1191/*
1192 * Parse environment variable 'k' as ulong with possibly a unit
1193 * suffix; if missing, use the default value 'val'.
1194 */
1195unsigned long git_env_ulong(const char *k, unsigned long val)
1196{
1197 const char *v = getenv(k);
1198 if (v && !git_parse_ulong(v, &val))
1199 die("failed to parse %s", k);
1200 return val;
1201}
1202
ab88c363
JK
1203int git_config_system(void)
1204{
1205 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1206}
1207
80181868 1208static int do_git_config_sequence(config_fn_t fn, void *data)
4f629539 1209{
c72ee44b 1210 int ret = 0;
509adc33
PT
1211 char *xdg_config = xdg_config_home("config");
1212 char *user_config = expand_user_path("~/.gitconfig");
80181868 1213 char *repo_config = git_pathdup("config");
5f1a63e0 1214
c72ee44b 1215 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
dc871831
DB
1216 ret += git_config_from_file(fn, git_etc_gitconfig(),
1217 data);
5f1a63e0 1218
c72ee44b 1219 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
21cf3227 1220 ret += git_config_from_file(fn, xdg_config, data);
21cf3227 1221
c72ee44b 1222 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
21cf3227 1223 ret += git_config_from_file(fn, user_config, data);
5f1a63e0 1224
c72ee44b 1225 if (repo_config && !access_or_die(repo_config, R_OK, 0))
aa387407 1226 ret += git_config_from_file(fn, repo_config, data);
8b1fa778 1227
c72ee44b 1228 if (git_config_from_parameters(fn, data) < 0)
8262aaa2 1229 die(_("unable to parse command-line config"));
8b1fa778 1230
21cf3227
HKNN
1231 free(xdg_config);
1232 free(user_config);
80181868 1233 free(repo_config);
c72ee44b 1234 return ret;
4f629539
JH
1235}
1236
c9b5e2a5 1237int git_config_with_options(config_fn_t fn, void *data,
c8985ce0 1238 struct git_config_source *config_source,
1bc88819 1239 int respect_includes)
dbdf5854 1240{
9b25a0b5
JK
1241 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1242
1243 if (respect_includes) {
1244 inc.fn = fn;
1245 inc.data = data;
1246 fn = git_config_include;
1247 data = &inc;
1248 }
dbdf5854 1249
c9b5e2a5
JK
1250 /*
1251 * If we have a specific filename, use it. Otherwise, follow the
1252 * regular lookup sequence.
1253 */
3caec73b
KS
1254 if (config_source && config_source->use_stdin)
1255 return git_config_from_stdin(fn, data);
1256 else if (config_source && config_source->file)
c8985ce0
KS
1257 return git_config_from_file(fn, config_source->file, data);
1258 else if (config_source && config_source->blob)
1259 return git_config_from_blob_ref(fn, config_source->blob, data);
c9b5e2a5 1260
80181868 1261 return do_git_config_sequence(fn, data);
dbdf5854
NTND
1262}
1263
155ef25f 1264static void git_config_raw(config_fn_t fn, void *data)
c9b5e2a5 1265{
aace4385
TA
1266 if (git_config_with_options(fn, data, NULL, 1) < 0)
1267 /*
1268 * git_config_with_options() normally returns only
c72ee44b 1269 * zero, as most errors are fatal, and
aace4385
TA
1270 * non-fatal potential errors are guarded by "if"
1271 * statements that are entered only when no error is
1272 * possible.
1273 *
1274 * If we ever encounter a non-fatal error, it means
1275 * something went really wrong and we should stop
1276 * immediately.
1277 */
1278 die(_("unknown error occured while reading the configuration files"));
c9b5e2a5
JK
1279}
1280
155ef25f 1281static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
c9b5e2a5 1282{
155ef25f
TA
1283 int i, value_index;
1284 struct string_list *values;
1285 struct config_set_element *entry;
1286 struct configset_list *list = &cs->list;
1287 struct key_value_info *kv_info;
1288
1289 for (i = 0; i < list->nr; i++) {
1290 entry = list->items[i].e;
1291 value_index = list->items[i].value_index;
1292 values = &entry->value_list;
1293 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1294 kv_info = values->items[value_index].util;
1295 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1296 }
1297 }
1298}
1299
1300static void git_config_check_init(void);
1301
1302void git_config(config_fn_t fn, void *data)
1303{
1304 git_config_check_init();
1305 configset_iter(&the_config_set, fn, data);
c9b5e2a5
JK
1306}
1307
3c8687a7
TA
1308static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1309{
1310 struct config_set_element k;
1311 struct config_set_element *found_entry;
1312 char *normalized_key;
3c8687a7
TA
1313 /*
1314 * `key` may come from the user, so normalize it before using it
1315 * for querying entries from the hashmap.
1316 */
270cd9ea 1317 if (git_config_parse_key(key, &normalized_key, NULL))
3c8687a7
TA
1318 return NULL;
1319
1320 hashmap_entry_init(&k, strhash(normalized_key));
1321 k.key = normalized_key;
1322 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1323 free(normalized_key);
1324 return found_entry;
1325}
1326
1327static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1328{
1329 struct config_set_element *e;
3df8fd62 1330 struct string_list_item *si;
155ef25f 1331 struct configset_list_item *l_item;
3df8fd62
TA
1332 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1333
3c8687a7
TA
1334 e = configset_find_element(cs, key);
1335 /*
1336 * Since the keys are being fed by git_config*() callback mechanism, they
1337 * are already normalized. So simply add them without any further munging.
1338 */
1339 if (!e) {
1340 e = xmalloc(sizeof(*e));
1341 hashmap_entry_init(e, strhash(key));
1342 e->key = xstrdup(key);
1343 string_list_init(&e->value_list, 1);
1344 hashmap_add(&cs->config_hash, e);
1345 }
8c53f071 1346 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
155ef25f
TA
1347
1348 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1349 l_item = &cs->list.items[cs->list.nr++];
1350 l_item->e = e;
1351 l_item->value_index = e->value_list.nr - 1;
1352
3258258f
JK
1353 if (!cf)
1354 die("BUG: configset_add_value has no source");
1355 if (cf->name) {
3df8fd62
TA
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
435ec090
CC
1597int git_config_get_untracked_cache(void)
1598{
1599 int val = -1;
1600 const char *v;
1601
dae6c322
CC
1602 /* Hack for test programs like test-dump-untracked-cache */
1603 if (ignore_untracked_cache_config)
1604 return -1;
1605
435ec090
CC
1606 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1607 return val;
1608
1609 if (!git_config_get_value("core.untrackedcache", &v)) {
1610 if (!strcasecmp(v, "keep"))
1611 return -1;
1612
1613 error("unknown core.untrackedCache value '%s'; "
1614 "using 'keep' default value", v);
1615 return -1;
1616 }
1617
1618 return -1; /* default value */
1619}
1620
5a80e97c
TA
1621NORETURN
1622void git_die_config_linenr(const char *key, const char *filename, int linenr)
1623{
1624 if (!filename)
1625 die(_("unable to parse '%s' from command-line config"), key);
1626 else
1627 die(_("bad config variable '%s' in file '%s' at line %d"),
1628 key, filename, linenr);
1629}
1630
1631NORETURN __attribute__((format(printf, 2, 3)))
1632void git_die_config(const char *key, const char *err, ...)
1633{
1634 const struct string_list *values;
1635 struct key_value_info *kv_info;
1636
1637 if (err) {
1638 va_list params;
1639 va_start(params, err);
1640 vreportf("error: ", err, params);
1641 va_end(params);
1642 }
1643 values = git_config_get_value_multi(key);
1644 kv_info = values->items[values->nr - 1].util;
1645 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
3c8687a7
TA
1646}
1647
10bea152
JS
1648/*
1649 * Find all the stuff for git_config_set() below.
1650 */
4ddba79d 1651
10bea152
JS
1652static struct {
1653 int baselen;
4b25d091 1654 char *key;
f98d863d 1655 int do_not_match;
4b25d091 1656 regex_t *value_regex;
4ddba79d 1657 int multi_replace;
83786fa4
TR
1658 size_t *offset;
1659 unsigned int offset_alloc;
10bea152
JS
1660 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1661 int seen;
1662} store;
1663
4b25d091 1664static int matches(const char *key, const char *value)
f98d863d 1665{
c1063be2
JK
1666 if (strcmp(key, store.key))
1667 return 0; /* not ours */
1668 if (!store.value_regex)
1669 return 1; /* always matches */
1670 if (store.value_regex == CONFIG_REGEX_NONE)
1671 return 0; /* never matches */
1672
1673 return store.do_not_match ^
1674 (value && !regexec(store.value_regex, value, 0, NULL, 0));
f98d863d
JS
1675}
1676
4b25d091 1677static int store_aux(const char *key, const char *value, void *cb)
10bea152 1678{
ae9ee41d
JH
1679 const char *ep;
1680 size_t section_len;
1681
10bea152
JS
1682 switch (store.state) {
1683 case KEY_SEEN:
f98d863d 1684 if (matches(key, value)) {
4ddba79d 1685 if (store.seen == 1 && store.multi_replace == 0) {
8262aaa2 1686 warning(_("%s has multiple values"), key);
10bea152 1687 }
4ddba79d 1688
83786fa4
TR
1689 ALLOC_GROW(store.offset, store.seen + 1,
1690 store.offset_alloc);
1691
49d6cfa5 1692 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1693 store.seen++;
1694 }
1695 break;
1696 case SECTION_SEEN:
ae9ee41d
JH
1697 /*
1698 * What we are looking for is in store.key (both
1699 * section and var), and its section part is baselen
1700 * long. We found key (again, both section and var).
1701 * We would want to know if this key is in the same
1702 * section as what we are looking for. We already
1703 * know we are in the same section as what should
1704 * hold store.key.
1705 */
1706 ep = strrchr(key, '.');
1707 section_len = ep - key;
1708
1709 if ((section_len != store.baselen) ||
1710 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1711 store.state = SECTION_END_SEEN;
1712 break;
ae9ee41d
JH
1713 }
1714
1715 /*
1716 * Do not increment matches: this is no match, but we
1717 * just made sure we are in the desired section.
1718 */
83786fa4
TR
1719 ALLOC_GROW(store.offset, store.seen + 1,
1720 store.offset_alloc);
49d6cfa5 1721 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1722 /* fallthru */
1723 case SECTION_END_SEEN:
1724 case START:
f98d863d 1725 if (matches(key, value)) {
83786fa4
TR
1726 ALLOC_GROW(store.offset, store.seen + 1,
1727 store.offset_alloc);
49d6cfa5 1728 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1729 store.state = KEY_SEEN;
1730 store.seen++;
d14f7764
LT
1731 } else {
1732 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1733 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1734 store.state = SECTION_SEEN;
83786fa4
TR
1735 ALLOC_GROW(store.offset,
1736 store.seen + 1,
1737 store.offset_alloc);
49d6cfa5 1738 store.offset[store.seen] = cf->do_ftell(cf);
d14f7764 1739 }
bdf0ef08 1740 }
10bea152
JS
1741 }
1742 return 0;
1743}
1744
64c0d71c 1745static int write_error(const char *filename)
480c9e52 1746{
64c0d71c 1747 error("failed to write new configuration file %s", filename);
480c9e52
AW
1748
1749 /* Same error code as "failed to rename". */
1750 return 4;
1751}
1752
4b25d091 1753static int store_write_section(int fd, const char *key)
10bea152 1754{
cb891a59
KH
1755 const char *dot;
1756 int i, success;
f285a2d7 1757 struct strbuf sb = STRBUF_INIT;
d14f7764 1758
cb891a59 1759 dot = memchr(key, '.', store.baselen);
d14f7764 1760 if (dot) {
cb891a59
KH
1761 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1762 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1763 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1764 strbuf_addch(&sb, '\\');
1765 strbuf_addch(&sb, key[i]);
d14f7764 1766 }
cb891a59
KH
1767 strbuf_addstr(&sb, "\"]\n");
1768 } else {
1769 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1770 }
1771
cb891a59
KH
1772 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1773 strbuf_release(&sb);
480c9e52 1774
cb891a59 1775 return success;
10bea152
JS
1776}
1777
4b25d091 1778static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1779{
cb891a59
KH
1780 int i, success;
1781 int length = strlen(key + store.baselen + 1);
1782 const char *quote = "";
f285a2d7 1783 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1784
6281f394
JM
1785 /*
1786 * Check to see if the value needs to be surrounded with a dq pair.
1787 * Note that problematic characters are always backslash-quoted; this
1788 * check is about not losing leading or trailing SP and strings that
1789 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1790 * configuration parser.
1791 */
cdd4fb15 1792 if (value[0] == ' ')
cb891a59 1793 quote = "\"";
cdd4fb15
BG
1794 for (i = 0; value[i]; i++)
1795 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1796 quote = "\"";
1797 if (i && value[i - 1] == ' ')
1798 quote = "\"";
1799
cb891a59
KH
1800 strbuf_addf(&sb, "\t%.*s = %s",
1801 length, key + store.baselen + 1, quote);
10bea152 1802
10bea152
JS
1803 for (i = 0; value[i]; i++)
1804 switch (value[i]) {
480c9e52 1805 case '\n':
cb891a59 1806 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1807 break;
1808 case '\t':
cb891a59 1809 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1810 break;
1811 case '"':
1812 case '\\':
cb891a59 1813 strbuf_addch(&sb, '\\');
480c9e52 1814 default:
cb891a59 1815 strbuf_addch(&sb, value[i]);
480c9e52
AW
1816 break;
1817 }
cb891a59
KH
1818 strbuf_addf(&sb, "%s\n", quote);
1819
1820 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1821 strbuf_release(&sb);
1822
1823 return success;
10bea152
JS
1824}
1825
4b25d091
FC
1826static ssize_t find_beginning_of_line(const char *contents, size_t size,
1827 size_t offset_, int *found_bracket)
4ddba79d 1828{
dc49cd76
SP
1829 size_t equal_offset = size, bracket_offset = size;
1830 ssize_t offset;
4ddba79d 1831
7a31cc0f 1832contline:
a6080a0a 1833 for (offset = offset_-2; offset > 0
4ddba79d
JS
1834 && contents[offset] != '\n'; offset--)
1835 switch (contents[offset]) {
1836 case '=': equal_offset = offset; break;
1837 case ']': bracket_offset = offset; break;
1838 }
7a31cc0f
FL
1839 if (offset > 0 && contents[offset-1] == '\\') {
1840 offset_ = offset;
1841 goto contline;
1842 }
4ddba79d
JS
1843 if (bracket_offset < equal_offset) {
1844 *found_bracket = 1;
1845 offset = bracket_offset+1;
1846 } else
1847 offset++;
1848
1849 return offset;
1850}
1851
30598ad0
PS
1852int git_config_set_in_file_gently(const char *config_filename,
1853 const char *key, const char *value)
5ec31182 1854{
30598ad0 1855 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
5ec31182
RR
1856}
1857
3d180648
PS
1858void git_config_set_in_file(const char *config_filename,
1859 const char *key, const char *value)
10bea152 1860{
3d180648 1861 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
b4c8aba6
PS
1862}
1863
30598ad0 1864int git_config_set_gently(const char *key, const char *value)
10bea152 1865{
30598ad0 1866 return git_config_set_multivar_gently(key, value, NULL, 0);
10bea152
JS
1867}
1868
3d180648 1869void git_config_set(const char *key, const char *value)
b4c8aba6 1870{
3d180648 1871 git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1872}
1873
b09c53a3
LP
1874/*
1875 * Auxiliary function to sanity-check and split the key into the section
1876 * identifier and variable name.
1877 *
1878 * Returns 0 on success, -1 when there is an invalid character in the key and
1879 * -2 if there is no section name in the key.
1880 *
1881 * store_key - pointer to char* which will hold a copy of the key with
1882 * lowercase section and variable name
1883 * baselen - pointer to int which will hold the length of the
1884 * section + subsection part, can be NULL
1885 */
9e9de18f 1886static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
b09c53a3
LP
1887{
1888 int i, dot, baselen;
1889 const char *last_dot = strrchr(key, '.');
1890
1891 /*
1892 * Since "key" actually contains the section name and the real
1893 * key name separated by a dot, we have to know where the dot is.
1894 */
1895
2169ddc0 1896 if (last_dot == NULL || last_dot == key) {
9e9de18f
JK
1897 if (!quiet)
1898 error("key does not contain a section: %s", key);
7a397419 1899 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1900 }
1901
2169ddc0 1902 if (!last_dot[1]) {
9e9de18f
JK
1903 if (!quiet)
1904 error("key does not contain variable name: %s", key);
7a397419 1905 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1906 }
1907
b09c53a3
LP
1908 baselen = last_dot - key;
1909 if (baselen_)
1910 *baselen_ = baselen;
1911
1912 /*
1913 * Validate the key and while at it, lower case it for matching.
1914 */
9e9de18f 1915 if (store_key)
3733e694 1916 *store_key = xmallocz(strlen(key));
b09c53a3
LP
1917
1918 dot = 0;
1919 for (i = 0; key[i]; i++) {
1920 unsigned char c = key[i];
1921 if (c == '.')
1922 dot = 1;
1923 /* Leave the extended basename untouched.. */
1924 if (!dot || i > baselen) {
1925 if (!iskeychar(c) ||
1926 (i == baselen + 1 && !isalpha(c))) {
9e9de18f
JK
1927 if (!quiet)
1928 error("invalid key: %s", key);
b09c53a3
LP
1929 goto out_free_ret_1;
1930 }
1931 c = tolower(c);
1932 } else if (c == '\n') {
9e9de18f
JK
1933 if (!quiet)
1934 error("invalid key (newline): %s", key);
b09c53a3
LP
1935 goto out_free_ret_1;
1936 }
9e9de18f
JK
1937 if (store_key)
1938 (*store_key)[i] = c;
b09c53a3 1939 }
b09c53a3
LP
1940
1941 return 0;
1942
1943out_free_ret_1:
9e9de18f
JK
1944 if (store_key) {
1945 free(*store_key);
1946 *store_key = NULL;
1947 }
7a397419 1948 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1949}
1950
9e9de18f
JK
1951int git_config_parse_key(const char *key, char **store_key, int *baselen)
1952{
1953 return git_config_parse_key_1(key, store_key, baselen, 0);
1954}
1955
1956int git_config_key_is_valid(const char *key)
1957{
1958 return !git_config_parse_key_1(key, NULL, NULL, 1);
1959}
1960
10bea152
JS
1961/*
1962 * If value==NULL, unset in (remove from) config,
1963 * if value_regex!=NULL, disregard key/value pairs where value does not match.
c1063be2
JK
1964 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1965 * (only add a new one)
4ddba79d
JS
1966 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1967 * else all matching key/values (regardless how many) are removed,
1968 * before the new pair is written.
10bea152
JS
1969 *
1970 * Returns 0 on success.
1971 *
1972 * This function does this:
1973 *
1974 * - it locks the config file by creating ".git/config.lock"
1975 *
1976 * - it then parses the config using store_aux() as validator to find
1977 * the position on the key/value pair to replace. If it is to be unset,
1978 * it must be found exactly once.
1979 *
1980 * - the config file is mmap()ed and the part before the match (if any) is
1981 * written to the lock file, then the changed part and the rest.
1982 *
1983 * - the config file is removed and the lock file rename()d to it.
1984 *
1985 */
30598ad0
PS
1986int git_config_set_multivar_in_file_gently(const char *config_filename,
1987 const char *key, const char *value,
1988 const char *value_regex,
1989 int multi_replace)
10bea152 1990{
54d160ec 1991 int fd = -1, in_fd = -1;
dafc88b1 1992 int ret;
6cbf973c 1993 struct lock_file *lock = NULL;
0a5f5759 1994 char *filename_buf = NULL;
3a1b3126
JK
1995 char *contents = NULL;
1996 size_t contents_sz;
4ddba79d 1997
b09c53a3
LP
1998 /* parse-key returns negative; flip the sign to feed exit(3) */
1999 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2000 if (ret)
dafc88b1 2001 goto out_free;
b17e659d
JS
2002
2003 store.multi_replace = multi_replace;
10bea152 2004
0a5f5759
JK
2005 if (!config_filename)
2006 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
2007
2008 /*
6cbf973c 2009 * The lock serves a purpose in addition to locking: the new
10bea152
JS
2010 * contents of .git/config will be written into it.
2011 */
f1064f6b 2012 lock = xcalloc(1, sizeof(struct lock_file));
6cbf973c
BS
2013 fd = hold_lock_file_for_update(lock, config_filename, 0);
2014 if (fd < 0) {
f0658ec9 2015 error_errno("could not lock config file %s", config_filename);
10bea152 2016 free(store.key);
7a397419 2017 ret = CONFIG_NO_LOCK;
dafc88b1 2018 goto out_free;
10bea152
JS
2019 }
2020
2021 /*
2022 * If .git/config does not exist yet, write a minimal version.
2023 */
88fb958b
AR
2024 in_fd = open(config_filename, O_RDONLY);
2025 if ( in_fd < 0 ) {
10bea152
JS
2026 free(store.key);
2027
88fb958b 2028 if ( ENOENT != errno ) {
f0658ec9 2029 error_errno("opening %s", config_filename);
7a397419 2030 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 2031 goto out_free;
88fb958b 2032 }
10bea152
JS
2033 /* if nothing to unset, error out */
2034 if (value == NULL) {
7a397419 2035 ret = CONFIG_NOTHING_SET;
dafc88b1 2036 goto out_free;
10bea152
JS
2037 }
2038
4b25d091 2039 store.key = (char *)key;
480c9e52 2040 if (!store_write_section(fd, key) ||
93c1e079
JH
2041 !store_write_pair(fd, key, value))
2042 goto write_err_out;
2043 } else {
88fb958b 2044 struct stat st;
3a1b3126 2045 size_t copy_begin, copy_end;
dc49cd76 2046 int i, new_line = 0;
10bea152
JS
2047
2048 if (value_regex == NULL)
2049 store.value_regex = NULL;
c1063be2
JK
2050 else if (value_regex == CONFIG_REGEX_NONE)
2051 store.value_regex = CONFIG_REGEX_NONE;
10bea152 2052 else {
f98d863d
JS
2053 if (value_regex[0] == '!') {
2054 store.do_not_match = 1;
2055 value_regex++;
2056 } else
2057 store.do_not_match = 0;
2058
2d7320d0 2059 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
2060 if (regcomp(store.value_regex, value_regex,
2061 REG_EXTENDED)) {
64c0d71c 2062 error("invalid pattern: %s", value_regex);
10bea152 2063 free(store.value_regex);
7a397419 2064 ret = CONFIG_INVALID_PATTERN;
dafc88b1 2065 goto out_free;
10bea152
JS
2066 }
2067 }
2068
83786fa4 2069 ALLOC_GROW(store.offset, 1, store.offset_alloc);
4ddba79d 2070 store.offset[0] = 0;
10bea152
JS
2071 store.state = START;
2072 store.seen = 0;
2073
2074 /*
2075 * After this, store.offset will contain the *end* offset
2076 * of the last match, or remain at 0 if no match was found.
2077 * As a side effect, we make sure to transform only a valid
2078 * existing config file.
2079 */
ef90d6d4 2080 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 2081 error("invalid config file %s", config_filename);
10bea152 2082 free(store.key);
c1063be2
JK
2083 if (store.value_regex != NULL &&
2084 store.value_regex != CONFIG_REGEX_NONE) {
10bea152
JS
2085 regfree(store.value_regex);
2086 free(store.value_regex);
2087 }
7a397419 2088 ret = CONFIG_INVALID_FILE;
dafc88b1 2089 goto out_free;
10bea152
JS
2090 }
2091
2092 free(store.key);
c1063be2
JK
2093 if (store.value_regex != NULL &&
2094 store.value_regex != CONFIG_REGEX_NONE) {
10bea152
JS
2095 regfree(store.value_regex);
2096 free(store.value_regex);
2097 }
2098
4ddba79d
JS
2099 /* if nothing to unset, or too many matches, error out */
2100 if ((store.seen == 0 && value == NULL) ||
2101 (store.seen > 1 && multi_replace == 0)) {
7a397419 2102 ret = CONFIG_NOTHING_SET;
dafc88b1 2103 goto out_free;
10bea152
JS
2104 }
2105
88fb958b 2106 fstat(in_fd, &st);
dc49cd76 2107 contents_sz = xsize_t(st.st_size);
1570856b
JK
2108 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2109 MAP_PRIVATE, in_fd, 0);
2110 if (contents == MAP_FAILED) {
0e8771f1
JK
2111 if (errno == ENODEV && S_ISDIR(st.st_mode))
2112 errno = EISDIR;
f0658ec9 2113 error_errno("unable to mmap '%s'", config_filename);
1570856b
JK
2114 ret = CONFIG_INVALID_FILE;
2115 contents = NULL;
2116 goto out_free;
2117 }
10bea152 2118 close(in_fd);
54d160ec 2119 in_fd = -1;
10bea152 2120
b4fb09e4 2121 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
f0658ec9 2122 error_errno("chmod on %s failed", get_lock_file_path(lock));
daa22c6f
EW
2123 ret = CONFIG_NO_WRITE;
2124 goto out_free;
2125 }
2126
4ddba79d
JS
2127 if (store.seen == 0)
2128 store.seen = 1;
2129
2130 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2131 if (store.offset[i] == 0) {
dc49cd76 2132 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
2133 } else if (store.state != KEY_SEEN) {
2134 copy_end = store.offset[i];
10bea152 2135 } else
4ddba79d 2136 copy_end = find_beginning_of_line(
dc49cd76 2137 contents, contents_sz,
4ddba79d
JS
2138 store.offset[i]-2, &new_line);
2139
02e5ba4a
JK
2140 if (copy_end > 0 && contents[copy_end-1] != '\n')
2141 new_line = 1;
2142
4ddba79d
JS
2143 /* write the first part of the config */
2144 if (copy_end > copy_begin) {
93c1e079
JH
2145 if (write_in_full(fd, contents + copy_begin,
2146 copy_end - copy_begin) <
2147 copy_end - copy_begin)
2148 goto write_err_out;
2149 if (new_line &&
2b7ca830 2150 write_str_in_full(fd, "\n") != 1)
93c1e079 2151 goto write_err_out;
4ddba79d
JS
2152 }
2153 copy_begin = store.offset[i];
10bea152
JS
2154 }
2155
10bea152
JS
2156 /* write the pair (value == NULL means unset) */
2157 if (value != NULL) {
93c1e079
JH
2158 if (store.state == START) {
2159 if (!store_write_section(fd, key))
2160 goto write_err_out;
480c9e52 2161 }
93c1e079
JH
2162 if (!store_write_pair(fd, key, value))
2163 goto write_err_out;
10bea152
JS
2164 }
2165
2166 /* write the rest of the config */
dc49cd76 2167 if (copy_begin < contents_sz)
93c1e079 2168 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
2169 contents_sz - copy_begin) <
2170 contents_sz - copy_begin)
93c1e079 2171 goto write_err_out;
7a64592c
KB
2172
2173 munmap(contents, contents_sz);
2174 contents = NULL;
10bea152
JS
2175 }
2176
4ed7cd3a 2177 if (commit_lock_file(lock) < 0) {
f0658ec9 2178 error_errno("could not write config file %s", config_filename);
7a397419 2179 ret = CONFIG_NO_WRITE;
e831855e 2180 lock = NULL;
dafc88b1 2181 goto out_free;
10bea152
JS
2182 }
2183
6cbf973c
BS
2184 /*
2185 * lock is committed, so don't try to roll it back below.
2186 * NOTE: Since lockfile.c keeps a linked list of all created
2187 * lock_file structures, it isn't safe to free(lock). It's
2188 * better to just leave it hanging around.
2189 */
2190 lock = NULL;
dafc88b1
SH
2191 ret = 0;
2192
3c8687a7
TA
2193 /* Invalidate the config cache */
2194 git_config_clear();
2195
dafc88b1 2196out_free:
6cbf973c
BS
2197 if (lock)
2198 rollback_lock_file(lock);
0a5f5759 2199 free(filename_buf);
3a1b3126
JK
2200 if (contents)
2201 munmap(contents, contents_sz);
54d160ec
SS
2202 if (in_fd >= 0)
2203 close(in_fd);
dafc88b1 2204 return ret;
93c1e079
JH
2205
2206write_err_out:
b4fb09e4 2207 ret = write_error(get_lock_file_path(lock));
93c1e079
JH
2208 goto out_free;
2209
10bea152
JS
2210}
2211
3d180648
PS
2212void git_config_set_multivar_in_file(const char *config_filename,
2213 const char *key, const char *value,
2214 const char *value_regex, int multi_replace)
b4c8aba6 2215{
1cae428e
JK
2216 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2217 value_regex, multi_replace))
2218 return;
2219 if (value)
8c3ca351 2220 die(_("could not set '%s' to '%s'"), key, value);
1cae428e
JK
2221 else
2222 die(_("could not unset '%s'"), key);
b4c8aba6
PS
2223}
2224
30598ad0
PS
2225int git_config_set_multivar_gently(const char *key, const char *value,
2226 const char *value_regex, int multi_replace)
5ec31182 2227{
30598ad0
PS
2228 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2229 multi_replace);
5ec31182
RR
2230}
2231
3d180648
PS
2232void git_config_set_multivar(const char *key, const char *value,
2233 const char *value_regex, int multi_replace)
5ec31182 2234{
3d180648
PS
2235 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2236 multi_replace);
5ec31182
RR
2237}
2238
118f8b24
PB
2239static int section_name_match (const char *buf, const char *name)
2240{
2241 int i = 0, j = 0, dot = 0;
a4c0d463
AV
2242 if (buf[i] != '[')
2243 return 0;
2244 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
2245 if (!dot && isspace(buf[i])) {
2246 dot = 1;
2247 if (name[j++] != '.')
2248 break;
2249 for (i++; isspace(buf[i]); i++)
2250 ; /* do nothing */
2251 if (buf[i] != '"')
2252 break;
2253 continue;
2254 }
2255 if (buf[i] == '\\' && dot)
2256 i++;
2257 else if (buf[i] == '"' && dot) {
2258 for (i++; isspace(buf[i]); i++)
2259 ; /* do_nothing */
2260 break;
2261 }
2262 if (buf[i] != name[j++])
2263 break;
2264 }
a4c0d463
AV
2265 if (buf[i] == ']' && name[j] == 0) {
2266 /*
2267 * We match, now just find the right length offset by
2268 * gobbling up any whitespace after it, as well
2269 */
2270 i++;
2271 for (; buf[i] && isspace(buf[i]); i++)
2272 ; /* do nothing */
2273 return i;
2274 }
2275 return 0;
118f8b24
PB
2276}
2277
94a35b1a
JK
2278static int section_name_is_ok(const char *name)
2279{
2280 /* Empty section names are bogus. */
2281 if (!*name)
2282 return 0;
2283
2284 /*
2285 * Before a dot, we must be alphanumeric or dash. After the first dot,
2286 * anything goes, so we can stop checking.
2287 */
2288 for (; *name && *name != '.'; name++)
2289 if (*name != '-' && !isalnum(*name))
2290 return 0;
2291 return 1;
2292}
2293
118f8b24 2294/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
2295int git_config_rename_section_in_file(const char *config_filename,
2296 const char *old_name, const char *new_name)
0667fcfb 2297{
118f8b24 2298 int ret = 0, remove = 0;
42bd39b5 2299 char *filename_buf = NULL;
94a35b1a 2300 struct lock_file *lock;
0667fcfb
JS
2301 int out_fd;
2302 char buf[1024];
924aaf3e 2303 FILE *config_file;
daa22c6f 2304 struct stat st;
0667fcfb 2305
94a35b1a
JK
2306 if (new_name && !section_name_is_ok(new_name)) {
2307 ret = error("invalid section name: %s", new_name);
2308 goto out;
2309 }
2310
42bd39b5
JK
2311 if (!config_filename)
2312 config_filename = filename_buf = git_pathdup("config");
2313
f1064f6b 2314 lock = xcalloc(1, sizeof(struct lock_file));
0667fcfb 2315 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 2316 if (out_fd < 0) {
64c0d71c 2317 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
2318 goto out;
2319 }
0667fcfb 2320
fc1905bb 2321 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
2322 /* no config file means nothing to rename, no error */
2323 goto unlock_and_out;
fc1905bb 2324 }
0667fcfb 2325
daa22c6f
EW
2326 fstat(fileno(config_file), &st);
2327
b4fb09e4 2328 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
f0658ec9
NTND
2329 ret = error_errno("chmod on %s failed",
2330 get_lock_file_path(lock));
daa22c6f
EW
2331 goto out;
2332 }
2333
0667fcfb
JS
2334 while (fgets(buf, sizeof(buf), config_file)) {
2335 int i;
480c9e52 2336 int length;
9a5abfc7 2337 char *output = buf;
0667fcfb
JS
2338 for (i = 0; buf[i] && isspace(buf[i]); i++)
2339 ; /* do nothing */
2340 if (buf[i] == '[') {
2341 /* it's a section */
a4c0d463
AV
2342 int offset = section_name_match(&buf[i], old_name);
2343 if (offset > 0) {
118f8b24
PB
2344 ret++;
2345 if (new_name == NULL) {
2346 remove = 1;
0667fcfb
JS
2347 continue;
2348 }
0667fcfb 2349 store.baselen = strlen(new_name);
480c9e52 2350 if (!store_write_section(out_fd, new_name)) {
b4fb09e4 2351 ret = write_error(get_lock_file_path(lock));
480c9e52
AW
2352 goto out;
2353 }
9a5abfc7
AV
2354 /*
2355 * We wrote out the new section, with
2356 * a newline, now skip the old
2357 * section's length
2358 */
2359 output += offset + i;
2360 if (strlen(output) > 0) {
2361 /*
2362 * More content means there's
2363 * a declaration to put on the
2364 * next line; indent with a
2365 * tab
2366 */
2367 output -= 1;
2368 output[0] = '\t';
2369 }
0667fcfb 2370 }
118f8b24 2371 remove = 0;
0667fcfb 2372 }
118f8b24
PB
2373 if (remove)
2374 continue;
9a5abfc7
AV
2375 length = strlen(output);
2376 if (write_in_full(out_fd, output, length) != length) {
b4fb09e4 2377 ret = write_error(get_lock_file_path(lock));
480c9e52
AW
2378 goto out;
2379 }
0667fcfb 2380 }
fc1905bb 2381 fclose(config_file);
8b590075 2382unlock_and_out:
4ed7cd3a 2383 if (commit_lock_file(lock) < 0)
f0658ec9
NTND
2384 ret = error_errno("could not write config file %s",
2385 config_filename);
8b590075 2386out:
42bd39b5 2387 free(filename_buf);
0667fcfb
JS
2388 return ret;
2389}
40ea4ed9 2390
42bd39b5
JK
2391int git_config_rename_section(const char *old_name, const char *new_name)
2392{
4a7bb5ba 2393 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
2394}
2395
40ea4ed9
JH
2396/*
2397 * Call this to report error for your variable that should not
2398 * get a boolean value (i.e. "[my] var" means "true").
2399 */
a469a101 2400#undef config_error_nonbool
40ea4ed9
JH
2401int config_error_nonbool(const char *var)
2402{
8c3ca351 2403 return error("missing value for '%s'", var);
40ea4ed9 2404}
1b86bbb0
JK
2405
2406int parse_config_key(const char *var,
2407 const char *section,
2408 const char **subsection, int *subsection_len,
2409 const char **key)
2410{
2411 int section_len = strlen(section);
2412 const char *dot;
2413
2414 /* Does it start with "section." ? */
59556548 2415 if (!starts_with(var, section) || var[section_len] != '.')
1b86bbb0
JK
2416 return -1;
2417
2418 /*
2419 * Find the key; we don't know yet if we have a subsection, but we must
2420 * parse backwards from the end, since the subsection may have dots in
2421 * it, too.
2422 */
2423 dot = strrchr(var, '.');
2424 *key = dot + 1;
2425
2426 /* Did we have a subsection at all? */
2427 if (dot == var + section_len) {
2428 *subsection = NULL;
2429 *subsection_len = 0;
2430 }
2431 else {
2432 *subsection = var + section_len + 1;
2433 *subsection_len = dot - *subsection;
2434 }
2435
2436 return 0;
2437}
473166b9
LS
2438
2439const char *current_config_origin_type(void)
2440{
3258258f
JK
2441 if (!cf)
2442 die("BUG: current_config_origin_type called outside config callback");
2443 return cf->origin_type ? cf->origin_type : "command line";
473166b9
LS
2444}
2445
2446const char *current_config_name(void)
2447{
3258258f
JK
2448 if (!cf)
2449 die("BUG: current_config_name called outside config callback");
2450 return cf->name ? cf->name : "";
473166b9 2451}