convert: drop arguments other than 'path' from would_convert_to_git()
[git/git.git] / config.c
CommitLineData
10bea152
JS
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
17712991 8#include "cache.h"
7f0e39fa 9#include "exec_cmd.h"
572e4f6a 10#include "strbuf.h"
2b64fc89 11#include "quote.h"
17712991 12
4d8dd149
HV
13struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
1bc88819
HV
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
4d8dd149 22 } u;
924aaf3e 23 const char *name;
d14d4244 24 const char *path;
b2dc0945 25 int die_on_error;
924aaf3e
RJ
26 int linenr;
27 int eof;
28 struct strbuf value;
0971e992 29 struct strbuf var;
924aaf3e 30
49d6cfa5
JK
31 int (*do_fgetc)(struct config_source *c);
32 int (*do_ungetc)(int c, struct config_source *conf);
33 long (*do_ftell)(struct config_source *c);
4d8dd149
HV
34};
35
36static struct config_source *cf;
924aaf3e 37
960ccca6
DH
38static int zlib_compression_seen;
39
4d8dd149
HV
40static int config_file_fgetc(struct config_source *conf)
41{
42 return fgetc(conf->u.file);
43}
44
45static int config_file_ungetc(int c, struct config_source *conf)
46{
47 return ungetc(c, conf->u.file);
48}
49
50static long config_file_ftell(struct config_source *conf)
51{
52 return ftell(conf->u.file);
53}
54
1bc88819
HV
55
56static int config_buf_fgetc(struct config_source *conf)
57{
58 if (conf->u.buf.pos < conf->u.buf.len)
59 return conf->u.buf.buf[conf->u.buf.pos++];
60
61 return EOF;
62}
63
64static int config_buf_ungetc(int c, struct config_source *conf)
65{
66 if (conf->u.buf.pos > 0)
67 return conf->u.buf.buf[--conf->u.buf.pos];
68
69 return EOF;
70}
71
72static long config_buf_ftell(struct config_source *conf)
73{
74 return conf->u.buf.pos;
75}
76
9b25a0b5
JK
77#define MAX_INCLUDE_DEPTH 10
78static const char include_depth_advice[] =
79"exceeded maximum include depth (%d) while including\n"
80" %s\n"
81"from\n"
82" %s\n"
83"Do you have circular includes?";
84static int handle_path_include(const char *path, struct config_include_data *inc)
85{
86 int ret = 0;
87 struct strbuf buf = STRBUF_INIT;
67beb600 88 char *expanded;
4c0a89fc 89
67beb600
JK
90 if (!path)
91 return config_error_nonbool("include.path");
92
93 expanded = expand_user_path(path);
4c0a89fc
JK
94 if (!expanded)
95 return error("Could not expand include path '%s'", path);
96 path = expanded;
9b25a0b5
JK
97
98 /*
99 * Use an absolute path as-is, but interpret relative paths
100 * based on the including config file.
101 */
102 if (!is_absolute_path(path)) {
103 char *slash;
104
d14d4244 105 if (!cf || !cf->path)
9b25a0b5
JK
106 return error("relative config includes must come from files");
107
d14d4244 108 slash = find_last_dir_sep(cf->path);
9b25a0b5 109 if (slash)
d14d4244 110 strbuf_add(&buf, cf->path, slash - cf->path + 1);
9b25a0b5
JK
111 strbuf_addstr(&buf, path);
112 path = buf.buf;
113 }
114
4698c8fe 115 if (!access_or_die(path, R_OK, 0)) {
9b25a0b5
JK
116 if (++inc->depth > MAX_INCLUDE_DEPTH)
117 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
118 cf && cf->name ? cf->name : "the command line");
119 ret = git_config_from_file(git_config_include, path, inc);
120 inc->depth--;
121 }
122 strbuf_release(&buf);
4c0a89fc 123 free(expanded);
9b25a0b5
JK
124 return ret;
125}
126
127int git_config_include(const char *var, const char *value, void *data)
128{
129 struct config_include_data *inc = data;
130 const char *type;
131 int ret;
132
133 /*
134 * Pass along all values, including "include" directives; this makes it
135 * possible to query information on the includes themselves.
136 */
137 ret = inc->fn(var, value, inc->data);
138 if (ret < 0)
139 return ret;
140
cf4fff57 141 if (!skip_prefix(var, "include.", &type))
9b25a0b5
JK
142 return ret;
143
144 if (!strcmp(type, "path"))
145 ret = handle_path_include(value, inc);
146 return ret;
147}
148
2b64fc89
JK
149void git_config_push_parameter(const char *text)
150{
151 struct strbuf env = STRBUF_INIT;
152 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
153 if (old) {
154 strbuf_addstr(&env, old);
155 strbuf_addch(&env, ' ');
156 }
157 sq_quote_buf(&env, text);
158 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
159 strbuf_release(&env);
160}
161
2496844b
JK
162int git_config_parse_parameter(const char *text,
163 config_fn_t fn, void *data)
8b1fa778 164{
572e4f6a 165 struct strbuf **pair;
f77bccae 166 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
167 if (!pair[0])
168 return error("bogus config parameter: %s", text);
572e4f6a
AR
169 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
170 strbuf_setlen(pair[0], pair[0]->len - 1);
171 strbuf_trim(pair[0]);
172 if (!pair[0]->len) {
173 strbuf_list_free(pair);
06eb708f 174 return error("bogus config parameter: %s", text);
8b1fa778 175 }
ffb20ce1 176 strbuf_tolower(pair[0]);
06eb708f
JK
177 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
178 strbuf_list_free(pair);
179 return -1;
572e4f6a
AR
180 }
181 strbuf_list_free(pair);
8b1fa778
AR
182 return 0;
183}
184
06eb708f
JK
185int git_config_from_parameters(config_fn_t fn, void *data)
186{
2b64fc89
JK
187 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
188 char *envw;
189 const char **argv = NULL;
190 int nr = 0, alloc = 0;
191 int i;
192
193 if (!env)
194 return 0;
195 /* sq_dequote will write over it */
196 envw = xstrdup(env);
197
198 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
199 free(envw);
200 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
201 }
202
203 for (i = 0; i < nr; i++) {
06eb708f 204 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
205 free(argv);
206 free(envw);
207 return -1;
208 }
209 }
210
211 free(argv);
212 free(envw);
06eb708f 213 return nr > 0;
2b64fc89
JK
214}
215
17712991
LT
216static int get_next_char(void)
217{
49d6cfa5 218 int c = cf->do_fgetc(cf);
17712991 219
dbb9a812
HV
220 if (c == '\r') {
221 /* DOS like systems */
49d6cfa5 222 c = cf->do_fgetc(cf);
dbb9a812 223 if (c != '\n') {
49d6cfa5 224 cf->do_ungetc(c, cf);
dbb9a812 225 c = '\r';
17712991
LT
226 }
227 }
dbb9a812
HV
228 if (c == '\n')
229 cf->linenr++;
230 if (c == EOF) {
231 cf->eof = 1;
232 c = '\n';
233 }
17712991
LT
234 return c;
235}
236
237static char *parse_value(void)
238{
e96c19c5 239 int quote = 0, comment = 0, space = 0;
17712991 240
924aaf3e 241 strbuf_reset(&cf->value);
17712991
LT
242 for (;;) {
243 int c = get_next_char();
17712991 244 if (c == '\n') {
4b340593
MS
245 if (quote) {
246 cf->linenr--;
17712991 247 return NULL;
4b340593 248 }
924aaf3e 249 return cf->value.buf;
17712991
LT
250 }
251 if (comment)
252 continue;
253 if (isspace(c) && !quote) {
924aaf3e 254 if (cf->value.len)
ebdaae37 255 space++;
17712991
LT
256 continue;
257 }
7ebdba61
JS
258 if (!quote) {
259 if (c == ';' || c == '#') {
260 comment = 1;
261 continue;
262 }
263 }
ebdaae37 264 for (; space; space--)
924aaf3e 265 strbuf_addch(&cf->value, ' ');
17712991
LT
266 if (c == '\\') {
267 c = get_next_char();
268 switch (c) {
269 case '\n':
270 continue;
271 case 't':
272 c = '\t';
273 break;
274 case 'b':
275 c = '\b';
276 break;
277 case 'n':
278 c = '\n';
279 break;
5cbb401d
LT
280 /* Some characters escape as themselves */
281 case '\\': case '"':
282 break;
283 /* Reject unknown escape sequences */
284 default:
285 return NULL;
17712991 286 }
924aaf3e 287 strbuf_addch(&cf->value, c);
17712991
LT
288 continue;
289 }
290 if (c == '"') {
291 quote = 1-quote;
292 continue;
293 }
924aaf3e 294 strbuf_addch(&cf->value, c);
17712991
LT
295 }
296}
297
38c5afa8
LT
298static inline int iskeychar(int c)
299{
300 return isalnum(c) || c == '-';
301}
302
0971e992 303static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
304{
305 int c;
306 char *value;
307
308 /* Get the full name */
309 for (;;) {
310 c = get_next_char();
924aaf3e 311 if (cf->eof)
17712991 312 break;
38c5afa8 313 if (!iskeychar(c))
17712991 314 break;
0971e992 315 strbuf_addch(name, tolower(c));
17712991 316 }
0971e992 317
17712991
LT
318 while (c == ' ' || c == '\t')
319 c = get_next_char();
320
321 value = NULL;
322 if (c != '\n') {
323 if (c != '=')
324 return -1;
325 value = parse_value();
326 if (!value)
327 return -1;
328 }
0971e992 329 return fn(name->buf, value, data);
17712991
LT
330}
331
0971e992 332static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
333{
334 do {
335 if (c == '\n')
4b340593 336 goto error_incomplete_line;
d14f7764
LT
337 c = get_next_char();
338 } while (isspace(c));
339
340 /* We require the format to be '[base "extension"]' */
341 if (c != '"')
342 return -1;
0971e992 343 strbuf_addch(name, '.');
d14f7764
LT
344
345 for (;;) {
346 int c = get_next_char();
347 if (c == '\n')
4b340593 348 goto error_incomplete_line;
d14f7764
LT
349 if (c == '"')
350 break;
351 if (c == '\\') {
352 c = get_next_char();
353 if (c == '\n')
4b340593 354 goto error_incomplete_line;
d14f7764 355 }
0971e992 356 strbuf_addch(name, c);
d14f7764
LT
357 }
358
359 /* Final ']' */
360 if (get_next_char() != ']')
361 return -1;
0971e992 362 return 0;
4b340593
MS
363error_incomplete_line:
364 cf->linenr--;
365 return -1;
d14f7764
LT
366}
367
0971e992 368static int get_base_var(struct strbuf *name)
17712991 369{
17712991
LT
370 for (;;) {
371 int c = get_next_char();
924aaf3e 372 if (cf->eof)
17712991
LT
373 return -1;
374 if (c == ']')
0971e992 375 return 0;
d14f7764 376 if (isspace(c))
0971e992 377 return get_extended_base_var(name, c);
38c5afa8 378 if (!iskeychar(c) && c != '.')
17712991 379 return -1;
0971e992 380 strbuf_addch(name, tolower(c));
17712991
LT
381 }
382}
383
4d8dd149 384static int git_parse_source(config_fn_t fn, void *data)
17712991
LT
385{
386 int comment = 0;
387 int baselen = 0;
0971e992 388 struct strbuf *var = &cf->var;
17712991 389
de056402
PB
390 /* U+FEFF Byte Order Mark in UTF8 */
391 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
392 const unsigned char *bomptr = utf8_bom;
393
17712991
LT
394 for (;;) {
395 int c = get_next_char();
de056402
PB
396 if (bomptr && *bomptr) {
397 /* We are at the file beginning; skip UTF8-encoded BOM
398 * if present. Sane editors won't put this in on their
399 * own, but e.g. Windows Notepad will do it happily. */
400 if ((unsigned char) c == *bomptr) {
401 bomptr++;
402 continue;
403 } else {
404 /* Do not tolerate partial BOM. */
405 if (bomptr != utf8_bom)
406 break;
407 /* No BOM at file beginning. Cool. */
408 bomptr = NULL;
409 }
410 }
17712991 411 if (c == '\n') {
924aaf3e 412 if (cf->eof)
17712991
LT
413 return 0;
414 comment = 0;
415 continue;
416 }
417 if (comment || isspace(c))
418 continue;
419 if (c == '#' || c == ';') {
420 comment = 1;
421 continue;
422 }
423 if (c == '[') {
0971e992
BW
424 /* Reset prior to determining a new stem */
425 strbuf_reset(var);
426 if (get_base_var(var) < 0 || var->len < 1)
17712991 427 break;
0971e992
BW
428 strbuf_addch(var, '.');
429 baselen = var->len;
17712991
LT
430 continue;
431 }
432 if (!isalpha(c))
433 break;
0971e992
BW
434 /*
435 * Truncate the var name back to the section header
436 * stem prior to grabbing the suffix part of the name
437 * and the value.
438 */
439 strbuf_setlen(var, baselen);
440 strbuf_addch(var, tolower(c));
441 if (get_value(fn, data, var) < 0)
17712991
LT
442 break;
443 }
b2dc0945
HV
444 if (cf->die_on_error)
445 die("bad config file line %d in %s", cf->linenr, cf->name);
446 else
447 return error("bad config file line %d in %s", cf->linenr, cf->name);
17712991
LT
448}
449
ebaa1bd4 450static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
451{
452 if (!*end)
453 return 1;
c8deb5a1
SP
454 else if (!strcasecmp(end, "k")) {
455 *val *= 1024;
456 return 1;
457 }
458 else if (!strcasecmp(end, "m")) {
459 *val *= 1024 * 1024;
460 return 1;
461 }
462 else if (!strcasecmp(end, "g")) {
463 *val *= 1024 * 1024 * 1024;
464 return 1;
465 }
466 return 0;
0b87b6e0
BD
467}
468
7192777d 469static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
0b87b6e0
BD
470{
471 if (value && *value) {
472 char *end;
ebaa1bd4
NA
473 intmax_t val;
474 uintmax_t uval;
475 uintmax_t factor = 1;
476
477 errno = 0;
478 val = strtoimax(value, &end, 0);
479 if (errno == ERANGE)
480 return 0;
33fdd77e
JK
481 if (!parse_unit_factor(end, &factor)) {
482 errno = EINVAL;
c8deb5a1 483 return 0;
33fdd77e 484 }
ebaa1bd4
NA
485 uval = abs(val);
486 uval *= factor;
33fdd77e
JK
487 if (uval > max || abs(val) > uval) {
488 errno = ERANGE;
ebaa1bd4 489 return 0;
33fdd77e 490 }
ebaa1bd4
NA
491 val *= factor;
492 *ret = val;
0b87b6e0
BD
493 return 1;
494 }
33fdd77e 495 errno = EINVAL;
0b87b6e0
BD
496 return 0;
497}
498
0b4dc661 499static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
17712991
LT
500{
501 if (value && *value) {
502 char *end;
ebaa1bd4
NA
503 uintmax_t val;
504 uintmax_t oldval;
505
506 errno = 0;
507 val = strtoumax(value, &end, 0);
508 if (errno == ERANGE)
509 return 0;
510 oldval = val;
33fdd77e
JK
511 if (!parse_unit_factor(end, &val)) {
512 errno = EINVAL;
c8deb5a1 513 return 0;
33fdd77e
JK
514 }
515 if (val > max || oldval > val) {
516 errno = ERANGE;
ebaa1bd4 517 return 0;
33fdd77e 518 }
c8deb5a1 519 *ret = val;
0b87b6e0 520 return 1;
17712991 521 }
33fdd77e 522 errno = EINVAL;
0b87b6e0
BD
523 return 0;
524}
525
42d194e9 526static int git_parse_int(const char *value, int *ret)
c1867cea 527{
7192777d 528 intmax_t tmp;
42d194e9 529 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
7192777d
JK
530 return 0;
531 *ret = tmp;
532 return 1;
533}
534
00160242
JK
535static int git_parse_int64(const char *value, int64_t *ret)
536{
537 intmax_t tmp;
538 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
539 return 0;
540 *ret = tmp;
541 return 1;
542}
543
7192777d
JK
544int git_parse_ulong(const char *value, unsigned long *ret)
545{
546 uintmax_t tmp;
547 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
548 return 0;
549 *ret = tmp;
550 return 1;
551}
552
06bdc23b 553NORETURN
2f666581 554static void die_bad_number(const char *name, const char *value)
c1867cea 555{
2f666581
JK
556 const char *reason = errno == ERANGE ?
557 "out of range" :
558 "invalid unit";
559 if (!value)
560 value = "";
561
924aaf3e 562 if (cf && cf->name)
2f666581
JK
563 die("bad numeric config value '%s' for '%s' in %s: %s",
564 value, name, cf->name, reason);
565 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
c1867cea
JK
566}
567
0b87b6e0
BD
568int git_config_int(const char *name, const char *value)
569{
42d194e9
JK
570 int ret;
571 if (!git_parse_int(value, &ret))
2f666581 572 die_bad_number(name, value);
0b87b6e0
BD
573 return ret;
574}
575
00160242
JK
576int64_t git_config_int64(const char *name, const char *value)
577{
578 int64_t ret;
579 if (!git_parse_int64(value, &ret))
580 die_bad_number(name, value);
0b87b6e0
BD
581 return ret;
582}
583
584unsigned long git_config_ulong(const char *name, const char *value)
585{
586 unsigned long ret;
587 if (!git_parse_ulong(value, &ret))
2f666581 588 die_bad_number(name, value);
0b87b6e0 589 return ret;
17712991
LT
590}
591
b2be2f6a 592static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
593{
594 if (!value)
595 return 1;
596 if (!*value)
597 return 0;
8420ccd8
JH
598 if (!strcasecmp(value, "true")
599 || !strcasecmp(value, "yes")
600 || !strcasecmp(value, "on"))
17712991 601 return 1;
8420ccd8
JH
602 if (!strcasecmp(value, "false")
603 || !strcasecmp(value, "no")
604 || !strcasecmp(value, "off"))
17712991 605 return 0;
8420ccd8
JH
606 return -1;
607}
608
b2be2f6a
JK
609int git_config_maybe_bool(const char *name, const char *value)
610{
42d194e9 611 int v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
612 if (0 <= v)
613 return v;
42d194e9 614 if (git_parse_int(value, &v))
db6195ef 615 return !!v;
b2be2f6a
JK
616 return -1;
617}
618
8420ccd8
JH
619int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
620{
b2be2f6a 621 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
622 if (0 <= v) {
623 *is_bool = 1;
624 return v;
625 }
a53f2ec6 626 *is_bool = 0;
c35b0b58 627 return git_config_int(name, value);
17712991
LT
628}
629
a53f2ec6
JH
630int git_config_bool(const char *name, const char *value)
631{
632 int discard;
c35b0b58 633 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
634}
635
ea5105a5
CC
636int git_config_string(const char **dest, const char *var, const char *value)
637{
638 if (!value)
639 return config_error_nonbool(var);
640 *dest = xstrdup(value);
641 return 0;
642}
643
395de250
MM
644int git_config_pathname(const char **dest, const char *var, const char *value)
645{
646 if (!value)
647 return config_error_nonbool(var);
648 *dest = expand_user_path(value);
649 if (!*dest)
650 die("Failed to expand user dir in: '%s'", value);
651 return 0;
652}
653
806e2ad7 654static int git_default_core_config(const char *var, const char *value)
17712991
LT
655{
656 /* This needs a better name */
657 if (!strcmp(var, "core.filemode")) {
658 trust_executable_bit = git_config_bool(var, value);
659 return 0;
660 }
1ce4790b
AR
661 if (!strcmp(var, "core.trustctime")) {
662 trust_ctime = git_config_bool(var, value);
663 return 0;
664 }
c1b5d738 665 if (!strcmp(var, "core.checkstat")) {
c08e4d5b
RR
666 if (!strcasecmp(value, "default"))
667 check_stat = 1;
668 else if (!strcasecmp(value, "minimal"))
669 check_stat = 0;
670 }
17712991 671
9378c161
JH
672 if (!strcmp(var, "core.quotepath")) {
673 quote_path_fully = git_config_bool(var, value);
674 return 0;
675 }
676
78a8d641
JS
677 if (!strcmp(var, "core.symlinks")) {
678 has_symlinks = git_config_bool(var, value);
679 return 0;
680 }
681
0a9b88b7
LT
682 if (!strcmp(var, "core.ignorecase")) {
683 ignore_case = git_config_bool(var, value);
684 return 0;
685 }
686
64589a03
JH
687 if (!strcmp(var, "core.attributesfile"))
688 return git_config_pathname(&git_attributes_file, var, value);
689
7d1864ce
JH
690 if (!strcmp(var, "core.bare")) {
691 is_bare_repository_cfg = git_config_bool(var, value);
692 return 0;
693 }
694
5f73076c
JH
695 if (!strcmp(var, "core.ignorestat")) {
696 assume_unchanged = git_config_bool(var, value);
697 return 0;
698 }
699
e388c738
JH
700 if (!strcmp(var, "core.prefersymlinkrefs")) {
701 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
702 return 0;
703 }
704
6de08ae6
SP
705 if (!strcmp(var, "core.logallrefupdates")) {
706 log_all_ref_updates = git_config_bool(var, value);
707 return 0;
708 }
709
2f8acdb3
JH
710 if (!strcmp(var, "core.warnambiguousrefs")) {
711 warn_ambiguous_refs = git_config_bool(var, value);
712 return 0;
713 }
714
a71f09fe 715 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
716 int abbrev = git_config_int(var, value);
717 if (abbrev < minimum_abbrev || abbrev > 40)
718 return -1;
719 default_abbrev = abbrev;
720 return 0;
721 }
722
960ccca6 723 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
724 int level = git_config_int(var, value);
725 if (level == -1)
726 level = Z_DEFAULT_COMPRESSION;
727 else if (level < 0 || level > Z_BEST_COMPRESSION)
728 die("bad zlib compression level %d", level);
729 zlib_compression_level = level;
960ccca6
DH
730 zlib_compression_seen = 1;
731 return 0;
732 }
733
734 if (!strcmp(var, "core.compression")) {
735 int level = git_config_int(var, value);
736 if (level == -1)
737 level = Z_DEFAULT_COMPRESSION;
738 else if (level < 0 || level > Z_BEST_COMPRESSION)
739 die("bad zlib compression level %d", level);
740 core_compression_level = level;
741 core_compression_seen = 1;
742 if (!zlib_compression_seen)
743 zlib_compression_level = level;
12f6c308
JBH
744 return 0;
745 }
746
60bb8b14 747 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 748 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 749 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
750
751 /* This value must be multiple of (pagesize * 2) */
752 packed_git_window_size /= pgsz_x2;
753 if (packed_git_window_size < 1)
754 packed_git_window_size = 1;
755 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
756 return 0;
757 }
758
15366280 759 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 760 big_file_threshold = git_config_ulong(var, value);
15366280
JH
761 return 0;
762 }
763
77ccc5bb 764 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 765 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
766 return 0;
767 }
768
18bdec11 769 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 770 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
771 return 0;
772 }
773
6c510bee 774 if (!strcmp(var, "core.autocrlf")) {
d7f46334 775 if (value && !strcasecmp(value, "input")) {
ec70f52f 776 if (core_eol == EOL_CRLF)
942e7747 777 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 778 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
779 return 0;
780 }
6c510bee
LT
781 auto_crlf = git_config_bool(var, value);
782 return 0;
783 }
784
21e5ad50
SP
785 if (!strcmp(var, "core.safecrlf")) {
786 if (value && !strcasecmp(value, "warn")) {
787 safe_crlf = SAFE_CRLF_WARN;
788 return 0;
789 }
790 safe_crlf = git_config_bool(var, value);
791 return 0;
792 }
793
942e7747
EB
794 if (!strcmp(var, "core.eol")) {
795 if (value && !strcasecmp(value, "lf"))
ec70f52f 796 core_eol = EOL_LF;
942e7747 797 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 798 core_eol = EOL_CRLF;
942e7747 799 else if (value && !strcasecmp(value, "native"))
ec70f52f 800 core_eol = EOL_NATIVE;
942e7747 801 else
ec70f52f
JH
802 core_eol = EOL_UNSET;
803 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
804 return error("core.autocrlf=input conflicts with core.eol=crlf");
805 return 0;
806 }
807
a97a7468
JS
808 if (!strcmp(var, "core.notesref")) {
809 notes_ref_name = xstrdup(value);
810 return 0;
811 }
812
806e2ad7
LT
813 if (!strcmp(var, "core.pager"))
814 return git_config_string(&pager_program, var, value);
815
816 if (!strcmp(var, "core.editor"))
817 return git_config_string(&editor_program, var, value);
818
eff80a9f 819 if (!strcmp(var, "core.commentchar")) {
649409b7
JK
820 if (!value)
821 return config_error_nonbool(var);
ad524f83 822 else if (!strcasecmp(value, "auto"))
84c9dc2c 823 auto_comment_line_char = 1;
ad524f83 824 else if (value[0] && !value[1]) {
649409b7 825 comment_line_char = value[0];
84c9dc2c 826 auto_comment_line_char = 0;
50b54fd7
NTND
827 } else
828 return error("core.commentChar should only be one character");
829 return 0;
eff80a9f
JH
830 }
831
d3e7da89
AK
832 if (!strcmp(var, "core.askpass"))
833 return git_config_string(&askpass_program, var, value);
834
806e2ad7 835 if (!strcmp(var, "core.excludesfile"))
395de250 836 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
837
838 if (!strcmp(var, "core.whitespace")) {
839 if (!value)
840 return config_error_nonbool(var);
841 whitespace_rule_cfg = parse_whitespace_rule(value);
842 return 0;
843 }
844
aafe9fba
LT
845 if (!strcmp(var, "core.fsyncobjectfiles")) {
846 fsync_object_files = git_config_bool(var, value);
847 return 0;
848 }
849
671c9b7e
LT
850 if (!strcmp(var, "core.preloadindex")) {
851 core_preload_index = git_config_bool(var, value);
852 return 0;
853 }
854
348df166
JS
855 if (!strcmp(var, "core.createobject")) {
856 if (!strcmp(value, "rename"))
857 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
858 else if (!strcmp(value, "link"))
859 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
860 else
861 die("Invalid mode for object creation: %s", value);
be66a6c4
JS
862 return 0;
863 }
864
08aefc9e
NTND
865 if (!strcmp(var, "core.sparsecheckout")) {
866 core_apply_sparse_checkout = git_config_bool(var, value);
867 return 0;
868 }
869
76759c7d
TB
870 if (!strcmp(var, "core.precomposeunicode")) {
871 precomposed_unicode = git_config_bool(var, value);
872 return 0;
873 }
874
806e2ad7
LT
875 /* Add other config variables here and to Documentation/config.txt. */
876 return 0;
877}
878
1141f492 879static int git_default_i18n_config(const char *var, const char *value)
d1364529 880{
ea5105a5
CC
881 if (!strcmp(var, "i18n.commitencoding"))
882 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 883
ea5105a5
CC
884 if (!strcmp(var, "i18n.logoutputencoding"))
885 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 886
1141f492
LT
887 /* Add other config variables here and to Documentation/config.txt. */
888 return 0;
889}
039bc64e 890
1141f492
LT
891static int git_default_branch_config(const char *var, const char *value)
892{
9ed36cfa
JS
893 if (!strcmp(var, "branch.autosetupmerge")) {
894 if (value && !strcasecmp(value, "always")) {
895 git_branch_track = BRANCH_TRACK_ALWAYS;
896 return 0;
897 }
898 git_branch_track = git_config_bool(var, value);
899 return 0;
900 }
c998ae9b
DS
901 if (!strcmp(var, "branch.autosetuprebase")) {
902 if (!value)
903 return config_error_nonbool(var);
904 else if (!strcmp(value, "never"))
905 autorebase = AUTOREBASE_NEVER;
906 else if (!strcmp(value, "local"))
907 autorebase = AUTOREBASE_LOCAL;
908 else if (!strcmp(value, "remote"))
909 autorebase = AUTOREBASE_REMOTE;
910 else if (!strcmp(value, "always"))
911 autorebase = AUTOREBASE_ALWAYS;
912 else
913 return error("Malformed value for %s", var);
914 return 0;
915 }
a9cc857a 916
1ab661dd 917 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
918 return 0;
919}
920
52153747
FAG
921static int git_default_push_config(const char *var, const char *value)
922{
923 if (!strcmp(var, "push.default")) {
924 if (!value)
925 return config_error_nonbool(var);
926 else if (!strcmp(value, "nothing"))
927 push_default = PUSH_DEFAULT_NOTHING;
928 else if (!strcmp(value, "matching"))
929 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
930 else if (!strcmp(value, "simple"))
931 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
932 else if (!strcmp(value, "upstream"))
933 push_default = PUSH_DEFAULT_UPSTREAM;
934 else if (!strcmp(value, "tracking")) /* deprecated */
935 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
936 else if (!strcmp(value, "current"))
937 push_default = PUSH_DEFAULT_CURRENT;
938 else {
939 error("Malformed value for %s: %s", var, value);
b55e6775
MM
940 return error("Must be one of nothing, matching, simple, "
941 "upstream or current.");
52153747
FAG
942 }
943 return 0;
944 }
945
946 /* Add other config variables here and to Documentation/config.txt. */
947 return 0;
948}
949
d551a488
MSO
950static int git_default_mailmap_config(const char *var, const char *value)
951{
952 if (!strcmp(var, "mailmap.file"))
9352fd57 953 return git_config_pathname(&git_mailmap_file, var, value);
08610900
JK
954 if (!strcmp(var, "mailmap.blob"))
955 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
956
957 /* Add other config variables here and to Documentation/config.txt. */
958 return 0;
959}
960
1141f492
LT
961int git_default_config(const char *var, const char *value, void *dummy)
962{
59556548 963 if (starts_with(var, "core."))
1141f492
LT
964 return git_default_core_config(var, value);
965
59556548 966 if (starts_with(var, "user."))
9597921b 967 return git_ident_config(var, value, dummy);
1141f492 968
59556548 969 if (starts_with(var, "i18n."))
1141f492
LT
970 return git_default_i18n_config(var, value);
971
59556548 972 if (starts_with(var, "branch."))
1141f492
LT
973 return git_default_branch_config(var, value);
974
59556548 975 if (starts_with(var, "push."))
52153747
FAG
976 return git_default_push_config(var, value);
977
59556548 978 if (starts_with(var, "mailmap."))
d551a488
MSO
979 return git_default_mailmap_config(var, value);
980
59556548 981 if (starts_with(var, "advice."))
75194438
JK
982 return git_default_advice_config(var, value);
983
1141f492
LT
984 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
985 pager_use_color = git_config_bool(var,value);
986 return 0;
987 }
988
568508e7
JH
989 if (!strcmp(var, "pack.packsizelimit")) {
990 pack_size_limit_cfg = git_config_ulong(var, value);
991 return 0;
992 }
1141f492
LT
993 /* Add other config variables here and to Documentation/config.txt. */
994 return 0;
995}
996
ca4b5de2 997/*
b2dc0945 998 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 999 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
1000 * this function.
1001 */
4d8dd149 1002static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
1003{
1004 int ret;
1005
1006 /* push config-file parsing state stack */
1007 top->prev = cf;
1008 top->linenr = 1;
1009 top->eof = 0;
1010 strbuf_init(&top->value, 1024);
1011 strbuf_init(&top->var, 1024);
1012 cf = top;
1013
4d8dd149 1014 ret = git_parse_source(fn, data);
ca4b5de2
HV
1015
1016 /* pop config-file parsing state stack */
1017 strbuf_release(&top->value);
1018 strbuf_release(&top->var);
1019 cf = top->prev;
1020
1021 return ret;
1022}
1023
3caec73b
KS
1024static int do_config_from_file(config_fn_t fn,
1025 const char *name, const char *path, FILE *f, void *data)
17712991 1026{
3caec73b 1027 struct config_source top;
17712991 1028
3caec73b
KS
1029 top.u.file = f;
1030 top.name = name;
1031 top.path = path;
1032 top.die_on_error = 1;
1033 top.do_fgetc = config_file_fgetc;
1034 top.do_ungetc = config_file_ungetc;
1035 top.do_ftell = config_file_ftell;
924aaf3e 1036
3caec73b
KS
1037 return do_config_from(&top, fn, data);
1038}
924aaf3e 1039
3caec73b
KS
1040static int git_config_from_stdin(config_fn_t fn, void *data)
1041{
1042 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1043}
1044
1045int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1046{
1047 int ret = -1;
1048 FILE *f;
924aaf3e 1049
3caec73b
KS
1050 f = fopen(filename, "r");
1051 if (f) {
1052 ret = do_config_from_file(fn, filename, filename, f, data);
17712991
LT
1053 fclose(f);
1054 }
1055 return ret;
1056}
10bea152 1057
1bc88819
HV
1058int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1059 size_t len, void *data)
1060{
1061 struct config_source top;
1062
1063 top.u.buf.buf = buf;
1064 top.u.buf.len = len;
1065 top.u.buf.pos = 0;
1066 top.name = name;
d14d4244 1067 top.path = NULL;
b2dc0945 1068 top.die_on_error = 0;
49d6cfa5
JK
1069 top.do_fgetc = config_buf_fgetc;
1070 top.do_ungetc = config_buf_ungetc;
1071 top.do_ftell = config_buf_ftell;
1bc88819
HV
1072
1073 return do_config_from(&top, fn, data);
1074}
1075
1076static int git_config_from_blob_sha1(config_fn_t fn,
1077 const char *name,
1078 const unsigned char *sha1,
1079 void *data)
1080{
1081 enum object_type type;
1082 char *buf;
1083 unsigned long size;
1084 int ret;
1085
1086 buf = read_sha1_file(sha1, &type, &size);
1087 if (!buf)
1088 return error("unable to load config blob object '%s'", name);
1089 if (type != OBJ_BLOB) {
1090 free(buf);
1091 return error("reference '%s' does not point to a blob", name);
1092 }
1093
1094 ret = git_config_from_buf(fn, name, buf, size, data);
1095 free(buf);
1096
1097 return ret;
1098}
1099
1100static int git_config_from_blob_ref(config_fn_t fn,
1101 const char *name,
1102 void *data)
1103{
1104 unsigned char sha1[20];
1105
1106 if (get_sha1(name, sha1) < 0)
1107 return error("unable to resolve config blob '%s'", name);
1108 return git_config_from_blob_sha1(fn, name, sha1, data);
1109}
1110
506b17b1
JS
1111const char *git_etc_gitconfig(void)
1112{
7f0e39fa 1113 static const char *system_wide;
2de9de5e
SP
1114 if (!system_wide)
1115 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1116 return system_wide;
506b17b1
JS
1117}
1118
0ef37164 1119int git_env_bool(const char *k, int def)
ab88c363
JK
1120{
1121 const char *v = getenv(k);
1122 return v ? git_config_bool(k, v) : def;
1123}
1124
1125int git_config_system(void)
1126{
1127 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1128}
1129
dbdf5854 1130int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1131{
aa387407 1132 int ret = 0, found = 0;
21cf3227
HKNN
1133 char *xdg_config = NULL;
1134 char *user_config = NULL;
1135
1136 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 1137
4698c8fe 1138 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1139 ret += git_config_from_file(fn, git_etc_gitconfig(),
1140 data);
aa387407
FC
1141 found += 1;
1142 }
5f1a63e0 1143
4698c8fe 1144 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1145 ret += git_config_from_file(fn, xdg_config, data);
1146 found += 1;
1147 }
1148
4698c8fe 1149 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1150 ret += git_config_from_file(fn, user_config, data);
1151 found += 1;
5f1a63e0
JS
1152 }
1153
4698c8fe 1154 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1155 ret += git_config_from_file(fn, repo_config, data);
1156 found += 1;
1157 }
8b1fa778 1158
5a0c9eeb
JK
1159 switch (git_config_from_parameters(fn, data)) {
1160 case -1: /* error */
1c2c9bee 1161 die("unable to parse command-line config");
5a0c9eeb
JK
1162 break;
1163 case 0: /* found nothing */
1164 break;
1165 default: /* found at least one item */
1166 found++;
1167 break;
1168 }
8b1fa778 1169
21cf3227
HKNN
1170 free(xdg_config);
1171 free(user_config);
1f2baa78 1172 return ret == 0 ? found : ret;
4f629539
JH
1173}
1174
c9b5e2a5 1175int git_config_with_options(config_fn_t fn, void *data,
c8985ce0 1176 struct git_config_source *config_source,
1bc88819 1177 int respect_includes)
dbdf5854
NTND
1178{
1179 char *repo_config = NULL;
1180 int ret;
9b25a0b5
JK
1181 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1182
1183 if (respect_includes) {
1184 inc.fn = fn;
1185 inc.data = data;
1186 fn = git_config_include;
1187 data = &inc;
1188 }
dbdf5854 1189
c9b5e2a5
JK
1190 /*
1191 * If we have a specific filename, use it. Otherwise, follow the
1192 * regular lookup sequence.
1193 */
3caec73b
KS
1194 if (config_source && config_source->use_stdin)
1195 return git_config_from_stdin(fn, data);
1196 else if (config_source && config_source->file)
c8985ce0
KS
1197 return git_config_from_file(fn, config_source->file, data);
1198 else if (config_source && config_source->blob)
1199 return git_config_from_blob_ref(fn, config_source->blob, data);
c9b5e2a5 1200
dbdf5854
NTND
1201 repo_config = git_pathdup("config");
1202 ret = git_config_early(fn, data, repo_config);
1203 if (repo_config)
1204 free(repo_config);
1205 return ret;
1206}
1207
c9b5e2a5
JK
1208int git_config(config_fn_t fn, void *data)
1209{
c8985ce0 1210 return git_config_with_options(fn, data, NULL, 1);
c9b5e2a5
JK
1211}
1212
10bea152
JS
1213/*
1214 * Find all the stuff for git_config_set() below.
1215 */
4ddba79d 1216
10bea152
JS
1217static struct {
1218 int baselen;
4b25d091 1219 char *key;
f98d863d 1220 int do_not_match;
4b25d091 1221 regex_t *value_regex;
4ddba79d 1222 int multi_replace;
83786fa4
TR
1223 size_t *offset;
1224 unsigned int offset_alloc;
10bea152
JS
1225 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1226 int seen;
1227} store;
1228
4b25d091 1229static int matches(const char *key, const char *value)
f98d863d
JS
1230{
1231 return !strcmp(key, store.key) &&
1232 (store.value_regex == NULL ||
1233 (store.do_not_match ^
1234 !regexec(store.value_regex, value, 0, NULL, 0)));
1235}
1236
4b25d091 1237static int store_aux(const char *key, const char *value, void *cb)
10bea152 1238{
ae9ee41d
JH
1239 const char *ep;
1240 size_t section_len;
1241
10bea152
JS
1242 switch (store.state) {
1243 case KEY_SEEN:
f98d863d 1244 if (matches(key, value)) {
4ddba79d 1245 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 1246 warning("%s has multiple values", key);
10bea152 1247 }
4ddba79d 1248
83786fa4
TR
1249 ALLOC_GROW(store.offset, store.seen + 1,
1250 store.offset_alloc);
1251
49d6cfa5 1252 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1253 store.seen++;
1254 }
1255 break;
1256 case SECTION_SEEN:
ae9ee41d
JH
1257 /*
1258 * What we are looking for is in store.key (both
1259 * section and var), and its section part is baselen
1260 * long. We found key (again, both section and var).
1261 * We would want to know if this key is in the same
1262 * section as what we are looking for. We already
1263 * know we are in the same section as what should
1264 * hold store.key.
1265 */
1266 ep = strrchr(key, '.');
1267 section_len = ep - key;
1268
1269 if ((section_len != store.baselen) ||
1270 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1271 store.state = SECTION_END_SEEN;
1272 break;
ae9ee41d
JH
1273 }
1274
1275 /*
1276 * Do not increment matches: this is no match, but we
1277 * just made sure we are in the desired section.
1278 */
83786fa4
TR
1279 ALLOC_GROW(store.offset, store.seen + 1,
1280 store.offset_alloc);
49d6cfa5 1281 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1282 /* fallthru */
1283 case SECTION_END_SEEN:
1284 case START:
f98d863d 1285 if (matches(key, value)) {
83786fa4
TR
1286 ALLOC_GROW(store.offset, store.seen + 1,
1287 store.offset_alloc);
49d6cfa5 1288 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1289 store.state = KEY_SEEN;
1290 store.seen++;
d14f7764
LT
1291 } else {
1292 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1293 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1294 store.state = SECTION_SEEN;
83786fa4
TR
1295 ALLOC_GROW(store.offset,
1296 store.seen + 1,
1297 store.offset_alloc);
49d6cfa5 1298 store.offset[store.seen] = cf->do_ftell(cf);
d14f7764 1299 }
bdf0ef08 1300 }
10bea152
JS
1301 }
1302 return 0;
1303}
1304
64c0d71c 1305static int write_error(const char *filename)
480c9e52 1306{
64c0d71c 1307 error("failed to write new configuration file %s", filename);
480c9e52
AW
1308
1309 /* Same error code as "failed to rename". */
1310 return 4;
1311}
1312
4b25d091 1313static int store_write_section(int fd, const char *key)
10bea152 1314{
cb891a59
KH
1315 const char *dot;
1316 int i, success;
f285a2d7 1317 struct strbuf sb = STRBUF_INIT;
d14f7764 1318
cb891a59 1319 dot = memchr(key, '.', store.baselen);
d14f7764 1320 if (dot) {
cb891a59
KH
1321 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1322 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1323 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1324 strbuf_addch(&sb, '\\');
1325 strbuf_addch(&sb, key[i]);
d14f7764 1326 }
cb891a59
KH
1327 strbuf_addstr(&sb, "\"]\n");
1328 } else {
1329 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1330 }
1331
cb891a59
KH
1332 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1333 strbuf_release(&sb);
480c9e52 1334
cb891a59 1335 return success;
10bea152
JS
1336}
1337
4b25d091 1338static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1339{
cb891a59
KH
1340 int i, success;
1341 int length = strlen(key + store.baselen + 1);
1342 const char *quote = "";
f285a2d7 1343 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1344
6281f394
JM
1345 /*
1346 * Check to see if the value needs to be surrounded with a dq pair.
1347 * Note that problematic characters are always backslash-quoted; this
1348 * check is about not losing leading or trailing SP and strings that
1349 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1350 * configuration parser.
1351 */
cdd4fb15 1352 if (value[0] == ' ')
cb891a59 1353 quote = "\"";
cdd4fb15
BG
1354 for (i = 0; value[i]; i++)
1355 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1356 quote = "\"";
1357 if (i && value[i - 1] == ' ')
1358 quote = "\"";
1359
cb891a59
KH
1360 strbuf_addf(&sb, "\t%.*s = %s",
1361 length, key + store.baselen + 1, quote);
10bea152 1362
10bea152
JS
1363 for (i = 0; value[i]; i++)
1364 switch (value[i]) {
480c9e52 1365 case '\n':
cb891a59 1366 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1367 break;
1368 case '\t':
cb891a59 1369 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1370 break;
1371 case '"':
1372 case '\\':
cb891a59 1373 strbuf_addch(&sb, '\\');
480c9e52 1374 default:
cb891a59 1375 strbuf_addch(&sb, value[i]);
480c9e52
AW
1376 break;
1377 }
cb891a59
KH
1378 strbuf_addf(&sb, "%s\n", quote);
1379
1380 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1381 strbuf_release(&sb);
1382
1383 return success;
10bea152
JS
1384}
1385
4b25d091
FC
1386static ssize_t find_beginning_of_line(const char *contents, size_t size,
1387 size_t offset_, int *found_bracket)
4ddba79d 1388{
dc49cd76
SP
1389 size_t equal_offset = size, bracket_offset = size;
1390 ssize_t offset;
4ddba79d 1391
7a31cc0f 1392contline:
a6080a0a 1393 for (offset = offset_-2; offset > 0
4ddba79d
JS
1394 && contents[offset] != '\n'; offset--)
1395 switch (contents[offset]) {
1396 case '=': equal_offset = offset; break;
1397 case ']': bracket_offset = offset; break;
1398 }
7a31cc0f
FL
1399 if (offset > 0 && contents[offset-1] == '\\') {
1400 offset_ = offset;
1401 goto contline;
1402 }
4ddba79d
JS
1403 if (bracket_offset < equal_offset) {
1404 *found_bracket = 1;
1405 offset = bracket_offset+1;
1406 } else
1407 offset++;
1408
1409 return offset;
1410}
1411
5ec31182
RR
1412int git_config_set_in_file(const char *config_filename,
1413 const char *key, const char *value)
1414{
1415 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1416}
1417
4b25d091 1418int git_config_set(const char *key, const char *value)
10bea152 1419{
4ddba79d 1420 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1421}
1422
b09c53a3
LP
1423/*
1424 * Auxiliary function to sanity-check and split the key into the section
1425 * identifier and variable name.
1426 *
1427 * Returns 0 on success, -1 when there is an invalid character in the key and
1428 * -2 if there is no section name in the key.
1429 *
1430 * store_key - pointer to char* which will hold a copy of the key with
1431 * lowercase section and variable name
1432 * baselen - pointer to int which will hold the length of the
1433 * section + subsection part, can be NULL
1434 */
1435int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1436{
1437 int i, dot, baselen;
1438 const char *last_dot = strrchr(key, '.');
1439
1440 /*
1441 * Since "key" actually contains the section name and the real
1442 * key name separated by a dot, we have to know where the dot is.
1443 */
1444
2169ddc0 1445 if (last_dot == NULL || last_dot == key) {
b09c53a3 1446 error("key does not contain a section: %s", key);
7a397419 1447 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1448 }
1449
2169ddc0
LP
1450 if (!last_dot[1]) {
1451 error("key does not contain variable name: %s", key);
7a397419 1452 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1453 }
1454
b09c53a3
LP
1455 baselen = last_dot - key;
1456 if (baselen_)
1457 *baselen_ = baselen;
1458
1459 /*
1460 * Validate the key and while at it, lower case it for matching.
1461 */
1462 *store_key = xmalloc(strlen(key) + 1);
1463
1464 dot = 0;
1465 for (i = 0; key[i]; i++) {
1466 unsigned char c = key[i];
1467 if (c == '.')
1468 dot = 1;
1469 /* Leave the extended basename untouched.. */
1470 if (!dot || i > baselen) {
1471 if (!iskeychar(c) ||
1472 (i == baselen + 1 && !isalpha(c))) {
1473 error("invalid key: %s", key);
1474 goto out_free_ret_1;
1475 }
1476 c = tolower(c);
1477 } else if (c == '\n') {
1478 error("invalid key (newline): %s", key);
1479 goto out_free_ret_1;
1480 }
1481 (*store_key)[i] = c;
1482 }
1483 (*store_key)[i] = 0;
1484
1485 return 0;
1486
1487out_free_ret_1:
1488 free(*store_key);
97ed50f9 1489 *store_key = NULL;
7a397419 1490 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1491}
1492
10bea152
JS
1493/*
1494 * If value==NULL, unset in (remove from) config,
1495 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1496 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1497 * else all matching key/values (regardless how many) are removed,
1498 * before the new pair is written.
10bea152
JS
1499 *
1500 * Returns 0 on success.
1501 *
1502 * This function does this:
1503 *
1504 * - it locks the config file by creating ".git/config.lock"
1505 *
1506 * - it then parses the config using store_aux() as validator to find
1507 * the position on the key/value pair to replace. If it is to be unset,
1508 * it must be found exactly once.
1509 *
1510 * - the config file is mmap()ed and the part before the match (if any) is
1511 * written to the lock file, then the changed part and the rest.
1512 *
1513 * - the config file is removed and the lock file rename()d to it.
1514 *
1515 */
5ec31182
RR
1516int git_config_set_multivar_in_file(const char *config_filename,
1517 const char *key, const char *value,
1518 const char *value_regex, int multi_replace)
10bea152 1519{
f8ba655e 1520 int fd = -1, in_fd;
dafc88b1 1521 int ret;
6cbf973c 1522 struct lock_file *lock = NULL;
0a5f5759 1523 char *filename_buf = NULL;
4ddba79d 1524
b09c53a3
LP
1525 /* parse-key returns negative; flip the sign to feed exit(3) */
1526 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1527 if (ret)
dafc88b1 1528 goto out_free;
b17e659d
JS
1529
1530 store.multi_replace = multi_replace;
10bea152 1531
0a5f5759
JK
1532 if (!config_filename)
1533 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1534
1535 /*
6cbf973c 1536 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1537 * contents of .git/config will be written into it.
1538 */
f1064f6b 1539 lock = xcalloc(1, sizeof(struct lock_file));
6cbf973c
BS
1540 fd = hold_lock_file_for_update(lock, config_filename, 0);
1541 if (fd < 0) {
6ffd567b 1542 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1543 free(store.key);
7a397419 1544 ret = CONFIG_NO_LOCK;
dafc88b1 1545 goto out_free;
10bea152
JS
1546 }
1547
1548 /*
1549 * If .git/config does not exist yet, write a minimal version.
1550 */
88fb958b
AR
1551 in_fd = open(config_filename, O_RDONLY);
1552 if ( in_fd < 0 ) {
10bea152
JS
1553 free(store.key);
1554
88fb958b
AR
1555 if ( ENOENT != errno ) {
1556 error("opening %s: %s", config_filename,
1557 strerror(errno));
7a397419 1558 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1559 goto out_free;
88fb958b 1560 }
10bea152
JS
1561 /* if nothing to unset, error out */
1562 if (value == NULL) {
7a397419 1563 ret = CONFIG_NOTHING_SET;
dafc88b1 1564 goto out_free;
10bea152
JS
1565 }
1566
4b25d091 1567 store.key = (char *)key;
480c9e52 1568 if (!store_write_section(fd, key) ||
93c1e079
JH
1569 !store_write_pair(fd, key, value))
1570 goto write_err_out;
1571 } else {
88fb958b 1572 struct stat st;
4b25d091 1573 char *contents;
dc49cd76
SP
1574 size_t contents_sz, copy_begin, copy_end;
1575 int i, new_line = 0;
10bea152
JS
1576
1577 if (value_regex == NULL)
1578 store.value_regex = NULL;
1579 else {
f98d863d
JS
1580 if (value_regex[0] == '!') {
1581 store.do_not_match = 1;
1582 value_regex++;
1583 } else
1584 store.do_not_match = 0;
1585
2d7320d0 1586 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1587 if (regcomp(store.value_regex, value_regex,
1588 REG_EXTENDED)) {
64c0d71c 1589 error("invalid pattern: %s", value_regex);
10bea152 1590 free(store.value_regex);
7a397419 1591 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1592 goto out_free;
10bea152
JS
1593 }
1594 }
1595
83786fa4 1596 ALLOC_GROW(store.offset, 1, store.offset_alloc);
4ddba79d 1597 store.offset[0] = 0;
10bea152
JS
1598 store.state = START;
1599 store.seen = 0;
1600
1601 /*
1602 * After this, store.offset will contain the *end* offset
1603 * of the last match, or remain at 0 if no match was found.
1604 * As a side effect, we make sure to transform only a valid
1605 * existing config file.
1606 */
ef90d6d4 1607 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1608 error("invalid config file %s", config_filename);
10bea152
JS
1609 free(store.key);
1610 if (store.value_regex != NULL) {
1611 regfree(store.value_regex);
1612 free(store.value_regex);
1613 }
7a397419 1614 ret = CONFIG_INVALID_FILE;
dafc88b1 1615 goto out_free;
10bea152
JS
1616 }
1617
1618 free(store.key);
1619 if (store.value_regex != NULL) {
1620 regfree(store.value_regex);
1621 free(store.value_regex);
1622 }
1623
4ddba79d
JS
1624 /* if nothing to unset, or too many matches, error out */
1625 if ((store.seen == 0 && value == NULL) ||
1626 (store.seen > 1 && multi_replace == 0)) {
7a397419 1627 ret = CONFIG_NOTHING_SET;
dafc88b1 1628 goto out_free;
10bea152
JS
1629 }
1630
88fb958b 1631 fstat(in_fd, &st);
dc49cd76
SP
1632 contents_sz = xsize_t(st.st_size);
1633 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1634 MAP_PRIVATE, in_fd, 0);
1635 close(in_fd);
1636
2569d239
KB
1637 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
1638 error("chmod on %s failed: %s",
daa22c6f
EW
1639 lock->filename, strerror(errno));
1640 ret = CONFIG_NO_WRITE;
1641 goto out_free;
1642 }
1643
4ddba79d
JS
1644 if (store.seen == 0)
1645 store.seen = 1;
1646
1647 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1648 if (store.offset[i] == 0) {
dc49cd76 1649 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1650 } else if (store.state != KEY_SEEN) {
1651 copy_end = store.offset[i];
10bea152 1652 } else
4ddba79d 1653 copy_end = find_beginning_of_line(
dc49cd76 1654 contents, contents_sz,
4ddba79d
JS
1655 store.offset[i]-2, &new_line);
1656
02e5ba4a
JK
1657 if (copy_end > 0 && contents[copy_end-1] != '\n')
1658 new_line = 1;
1659
4ddba79d
JS
1660 /* write the first part of the config */
1661 if (copy_end > copy_begin) {
93c1e079
JH
1662 if (write_in_full(fd, contents + copy_begin,
1663 copy_end - copy_begin) <
1664 copy_end - copy_begin)
1665 goto write_err_out;
1666 if (new_line &&
2b7ca830 1667 write_str_in_full(fd, "\n") != 1)
93c1e079 1668 goto write_err_out;
4ddba79d
JS
1669 }
1670 copy_begin = store.offset[i];
10bea152
JS
1671 }
1672
10bea152
JS
1673 /* write the pair (value == NULL means unset) */
1674 if (value != NULL) {
93c1e079
JH
1675 if (store.state == START) {
1676 if (!store_write_section(fd, key))
1677 goto write_err_out;
480c9e52 1678 }
93c1e079
JH
1679 if (!store_write_pair(fd, key, value))
1680 goto write_err_out;
10bea152
JS
1681 }
1682
1683 /* write the rest of the config */
dc49cd76 1684 if (copy_begin < contents_sz)
93c1e079 1685 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1686 contents_sz - copy_begin) <
1687 contents_sz - copy_begin)
93c1e079 1688 goto write_err_out;
10bea152 1689
dc49cd76 1690 munmap(contents, contents_sz);
10bea152
JS
1691 }
1692
4ed7cd3a 1693 if (commit_lock_file(lock) < 0) {
64c0d71c 1694 error("could not commit config file %s", config_filename);
7a397419 1695 ret = CONFIG_NO_WRITE;
dafc88b1 1696 goto out_free;
10bea152
JS
1697 }
1698
6cbf973c
BS
1699 /*
1700 * lock is committed, so don't try to roll it back below.
1701 * NOTE: Since lockfile.c keeps a linked list of all created
1702 * lock_file structures, it isn't safe to free(lock). It's
1703 * better to just leave it hanging around.
1704 */
1705 lock = NULL;
dafc88b1
SH
1706 ret = 0;
1707
1708out_free:
6cbf973c
BS
1709 if (lock)
1710 rollback_lock_file(lock);
0a5f5759 1711 free(filename_buf);
dafc88b1 1712 return ret;
93c1e079
JH
1713
1714write_err_out:
64c0d71c 1715 ret = write_error(lock->filename);
93c1e079
JH
1716 goto out_free;
1717
10bea152
JS
1718}
1719
5ec31182
RR
1720int git_config_set_multivar(const char *key, const char *value,
1721 const char *value_regex, int multi_replace)
1722{
4a7bb5ba 1723 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 1724 multi_replace);
5ec31182
RR
1725}
1726
118f8b24
PB
1727static int section_name_match (const char *buf, const char *name)
1728{
1729 int i = 0, j = 0, dot = 0;
a4c0d463
AV
1730 if (buf[i] != '[')
1731 return 0;
1732 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
1733 if (!dot && isspace(buf[i])) {
1734 dot = 1;
1735 if (name[j++] != '.')
1736 break;
1737 for (i++; isspace(buf[i]); i++)
1738 ; /* do nothing */
1739 if (buf[i] != '"')
1740 break;
1741 continue;
1742 }
1743 if (buf[i] == '\\' && dot)
1744 i++;
1745 else if (buf[i] == '"' && dot) {
1746 for (i++; isspace(buf[i]); i++)
1747 ; /* do_nothing */
1748 break;
1749 }
1750 if (buf[i] != name[j++])
1751 break;
1752 }
a4c0d463
AV
1753 if (buf[i] == ']' && name[j] == 0) {
1754 /*
1755 * We match, now just find the right length offset by
1756 * gobbling up any whitespace after it, as well
1757 */
1758 i++;
1759 for (; buf[i] && isspace(buf[i]); i++)
1760 ; /* do nothing */
1761 return i;
1762 }
1763 return 0;
118f8b24
PB
1764}
1765
94a35b1a
JK
1766static int section_name_is_ok(const char *name)
1767{
1768 /* Empty section names are bogus. */
1769 if (!*name)
1770 return 0;
1771
1772 /*
1773 * Before a dot, we must be alphanumeric or dash. After the first dot,
1774 * anything goes, so we can stop checking.
1775 */
1776 for (; *name && *name != '.'; name++)
1777 if (*name != '-' && !isalnum(*name))
1778 return 0;
1779 return 1;
1780}
1781
118f8b24 1782/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
1783int git_config_rename_section_in_file(const char *config_filename,
1784 const char *old_name, const char *new_name)
0667fcfb 1785{
118f8b24 1786 int ret = 0, remove = 0;
42bd39b5 1787 char *filename_buf = NULL;
94a35b1a 1788 struct lock_file *lock;
0667fcfb
JS
1789 int out_fd;
1790 char buf[1024];
924aaf3e 1791 FILE *config_file;
daa22c6f 1792 struct stat st;
0667fcfb 1793
94a35b1a
JK
1794 if (new_name && !section_name_is_ok(new_name)) {
1795 ret = error("invalid section name: %s", new_name);
1796 goto out;
1797 }
1798
42bd39b5
JK
1799 if (!config_filename)
1800 config_filename = filename_buf = git_pathdup("config");
1801
f1064f6b 1802 lock = xcalloc(1, sizeof(struct lock_file));
0667fcfb 1803 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1804 if (out_fd < 0) {
64c0d71c 1805 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1806 goto out;
1807 }
0667fcfb 1808
fc1905bb 1809 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1810 /* no config file means nothing to rename, no error */
1811 goto unlock_and_out;
fc1905bb 1812 }
0667fcfb 1813
daa22c6f
EW
1814 fstat(fileno(config_file), &st);
1815
2569d239
KB
1816 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
1817 ret = error("chmod on %s failed: %s",
daa22c6f
EW
1818 lock->filename, strerror(errno));
1819 goto out;
1820 }
1821
0667fcfb
JS
1822 while (fgets(buf, sizeof(buf), config_file)) {
1823 int i;
480c9e52 1824 int length;
9a5abfc7 1825 char *output = buf;
0667fcfb
JS
1826 for (i = 0; buf[i] && isspace(buf[i]); i++)
1827 ; /* do nothing */
1828 if (buf[i] == '[') {
1829 /* it's a section */
a4c0d463
AV
1830 int offset = section_name_match(&buf[i], old_name);
1831 if (offset > 0) {
118f8b24
PB
1832 ret++;
1833 if (new_name == NULL) {
1834 remove = 1;
0667fcfb
JS
1835 continue;
1836 }
0667fcfb 1837 store.baselen = strlen(new_name);
480c9e52 1838 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1839 ret = write_error(lock->filename);
480c9e52
AW
1840 goto out;
1841 }
9a5abfc7
AV
1842 /*
1843 * We wrote out the new section, with
1844 * a newline, now skip the old
1845 * section's length
1846 */
1847 output += offset + i;
1848 if (strlen(output) > 0) {
1849 /*
1850 * More content means there's
1851 * a declaration to put on the
1852 * next line; indent with a
1853 * tab
1854 */
1855 output -= 1;
1856 output[0] = '\t';
1857 }
0667fcfb 1858 }
118f8b24 1859 remove = 0;
0667fcfb 1860 }
118f8b24
PB
1861 if (remove)
1862 continue;
9a5abfc7
AV
1863 length = strlen(output);
1864 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 1865 ret = write_error(lock->filename);
480c9e52
AW
1866 goto out;
1867 }
0667fcfb 1868 }
fc1905bb 1869 fclose(config_file);
8b590075 1870unlock_and_out:
4ed7cd3a 1871 if (commit_lock_file(lock) < 0)
64c0d71c 1872 ret = error("could not commit config file %s", config_filename);
8b590075 1873out:
42bd39b5 1874 free(filename_buf);
0667fcfb
JS
1875 return ret;
1876}
40ea4ed9 1877
42bd39b5
JK
1878int git_config_rename_section(const char *old_name, const char *new_name)
1879{
4a7bb5ba 1880 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
1881}
1882
40ea4ed9
JH
1883/*
1884 * Call this to report error for your variable that should not
1885 * get a boolean value (i.e. "[my] var" means "true").
1886 */
a469a101 1887#undef config_error_nonbool
40ea4ed9
JH
1888int config_error_nonbool(const char *var)
1889{
1890 return error("Missing value for '%s'", var);
1891}
1b86bbb0
JK
1892
1893int parse_config_key(const char *var,
1894 const char *section,
1895 const char **subsection, int *subsection_len,
1896 const char **key)
1897{
1898 int section_len = strlen(section);
1899 const char *dot;
1900
1901 /* Does it start with "section." ? */
59556548 1902 if (!starts_with(var, section) || var[section_len] != '.')
1b86bbb0
JK
1903 return -1;
1904
1905 /*
1906 * Find the key; we don't know yet if we have a subsection, but we must
1907 * parse backwards from the end, since the subsection may have dots in
1908 * it, too.
1909 */
1910 dot = strrchr(var, '.');
1911 *key = dot + 1;
1912
1913 /* Did we have a subsection at all? */
1914 if (dot == var + section_len) {
1915 *subsection = NULL;
1916 *subsection_len = 0;
1917 }
1918 else {
1919 *subsection = var + section_len + 1;
1920 *subsection_len = dot - *subsection;
1921 }
1922
1923 return 0;
1924}