change `git_config()` return value to void
[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"
3c8687a7
TA
12#include "hashmap.h"
13#include "string-list.h"
17712991 14
4d8dd149
HV
15struct config_source {
16 struct config_source *prev;
17 union {
18 FILE *file;
1bc88819
HV
19 struct config_buf {
20 const char *buf;
21 size_t len;
22 size_t pos;
23 } buf;
4d8dd149 24 } u;
924aaf3e 25 const char *name;
d14d4244 26 const char *path;
b2dc0945 27 int die_on_error;
924aaf3e
RJ
28 int linenr;
29 int eof;
30 struct strbuf value;
0971e992 31 struct strbuf var;
924aaf3e 32
49d6cfa5
JK
33 int (*do_fgetc)(struct config_source *c);
34 int (*do_ungetc)(int c, struct config_source *conf);
35 long (*do_ftell)(struct config_source *c);
4d8dd149
HV
36};
37
3c8687a7
TA
38struct config_set_element {
39 struct hashmap_entry ent;
40 char *key;
41 struct string_list value_list;
42};
43
4d8dd149 44static struct config_source *cf;
924aaf3e 45
960ccca6
DH
46static int zlib_compression_seen;
47
3c8687a7
TA
48/*
49 * Default config_set that contains key-value pairs from the usual set of config
50 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
51 * config file and the global /etc/gitconfig)
52 */
53static struct config_set the_config_set;
54
4d8dd149
HV
55static int config_file_fgetc(struct config_source *conf)
56{
57 return fgetc(conf->u.file);
58}
59
60static int config_file_ungetc(int c, struct config_source *conf)
61{
62 return ungetc(c, conf->u.file);
63}
64
65static long config_file_ftell(struct config_source *conf)
66{
67 return ftell(conf->u.file);
68}
69
1bc88819
HV
70
71static int config_buf_fgetc(struct config_source *conf)
72{
73 if (conf->u.buf.pos < conf->u.buf.len)
74 return conf->u.buf.buf[conf->u.buf.pos++];
75
76 return EOF;
77}
78
79static int config_buf_ungetc(int c, struct config_source *conf)
80{
81 if (conf->u.buf.pos > 0)
82 return conf->u.buf.buf[--conf->u.buf.pos];
83
84 return EOF;
85}
86
87static long config_buf_ftell(struct config_source *conf)
88{
89 return conf->u.buf.pos;
90}
91
9b25a0b5
JK
92#define MAX_INCLUDE_DEPTH 10
93static const char include_depth_advice[] =
94"exceeded maximum include depth (%d) while including\n"
95" %s\n"
96"from\n"
97" %s\n"
98"Do you have circular includes?";
99static int handle_path_include(const char *path, struct config_include_data *inc)
100{
101 int ret = 0;
102 struct strbuf buf = STRBUF_INIT;
67beb600 103 char *expanded;
4c0a89fc 104
67beb600
JK
105 if (!path)
106 return config_error_nonbool("include.path");
107
108 expanded = expand_user_path(path);
4c0a89fc
JK
109 if (!expanded)
110 return error("Could not expand include path '%s'", path);
111 path = expanded;
9b25a0b5
JK
112
113 /*
114 * Use an absolute path as-is, but interpret relative paths
115 * based on the including config file.
116 */
117 if (!is_absolute_path(path)) {
118 char *slash;
119
d14d4244 120 if (!cf || !cf->path)
9b25a0b5
JK
121 return error("relative config includes must come from files");
122
d14d4244 123 slash = find_last_dir_sep(cf->path);
9b25a0b5 124 if (slash)
d14d4244 125 strbuf_add(&buf, cf->path, slash - cf->path + 1);
9b25a0b5
JK
126 strbuf_addstr(&buf, path);
127 path = buf.buf;
128 }
129
4698c8fe 130 if (!access_or_die(path, R_OK, 0)) {
9b25a0b5
JK
131 if (++inc->depth > MAX_INCLUDE_DEPTH)
132 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
133 cf && cf->name ? cf->name : "the command line");
134 ret = git_config_from_file(git_config_include, path, inc);
135 inc->depth--;
136 }
137 strbuf_release(&buf);
4c0a89fc 138 free(expanded);
9b25a0b5
JK
139 return ret;
140}
141
142int git_config_include(const char *var, const char *value, void *data)
143{
144 struct config_include_data *inc = data;
145 const char *type;
146 int ret;
147
148 /*
149 * Pass along all values, including "include" directives; this makes it
150 * possible to query information on the includes themselves.
151 */
152 ret = inc->fn(var, value, inc->data);
153 if (ret < 0)
154 return ret;
155
cf4fff57 156 if (!skip_prefix(var, "include.", &type))
9b25a0b5
JK
157 return ret;
158
159 if (!strcmp(type, "path"))
160 ret = handle_path_include(value, inc);
161 return ret;
162}
163
2b64fc89
JK
164void git_config_push_parameter(const char *text)
165{
166 struct strbuf env = STRBUF_INIT;
167 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
168 if (old) {
169 strbuf_addstr(&env, old);
170 strbuf_addch(&env, ' ');
171 }
172 sq_quote_buf(&env, text);
173 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
174 strbuf_release(&env);
175}
176
2496844b
JK
177int git_config_parse_parameter(const char *text,
178 config_fn_t fn, void *data)
8b1fa778 179{
572e4f6a 180 struct strbuf **pair;
f77bccae 181 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
182 if (!pair[0])
183 return error("bogus config parameter: %s", text);
572e4f6a
AR
184 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
185 strbuf_setlen(pair[0], pair[0]->len - 1);
186 strbuf_trim(pair[0]);
187 if (!pair[0]->len) {
188 strbuf_list_free(pair);
06eb708f 189 return error("bogus config parameter: %s", text);
8b1fa778 190 }
ffb20ce1 191 strbuf_tolower(pair[0]);
06eb708f
JK
192 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
193 strbuf_list_free(pair);
194 return -1;
572e4f6a
AR
195 }
196 strbuf_list_free(pair);
8b1fa778
AR
197 return 0;
198}
199
06eb708f
JK
200int git_config_from_parameters(config_fn_t fn, void *data)
201{
2b64fc89
JK
202 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
203 char *envw;
204 const char **argv = NULL;
205 int nr = 0, alloc = 0;
206 int i;
207
208 if (!env)
209 return 0;
210 /* sq_dequote will write over it */
211 envw = xstrdup(env);
212
213 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
214 free(envw);
215 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
216 }
217
218 for (i = 0; i < nr; i++) {
06eb708f 219 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
220 free(argv);
221 free(envw);
222 return -1;
223 }
224 }
225
226 free(argv);
227 free(envw);
06eb708f 228 return nr > 0;
2b64fc89
JK
229}
230
17712991
LT
231static int get_next_char(void)
232{
49d6cfa5 233 int c = cf->do_fgetc(cf);
17712991 234
dbb9a812
HV
235 if (c == '\r') {
236 /* DOS like systems */
49d6cfa5 237 c = cf->do_fgetc(cf);
dbb9a812 238 if (c != '\n') {
49d6cfa5 239 cf->do_ungetc(c, cf);
dbb9a812 240 c = '\r';
17712991
LT
241 }
242 }
dbb9a812
HV
243 if (c == '\n')
244 cf->linenr++;
245 if (c == EOF) {
246 cf->eof = 1;
b3b3f60b 247 cf->linenr++;
dbb9a812
HV
248 c = '\n';
249 }
17712991
LT
250 return c;
251}
252
253static char *parse_value(void)
254{
e96c19c5 255 int quote = 0, comment = 0, space = 0;
17712991 256
924aaf3e 257 strbuf_reset(&cf->value);
17712991
LT
258 for (;;) {
259 int c = get_next_char();
17712991 260 if (c == '\n') {
4b340593
MS
261 if (quote) {
262 cf->linenr--;
17712991 263 return NULL;
4b340593 264 }
924aaf3e 265 return cf->value.buf;
17712991
LT
266 }
267 if (comment)
268 continue;
269 if (isspace(c) && !quote) {
924aaf3e 270 if (cf->value.len)
ebdaae37 271 space++;
17712991
LT
272 continue;
273 }
7ebdba61
JS
274 if (!quote) {
275 if (c == ';' || c == '#') {
276 comment = 1;
277 continue;
278 }
279 }
ebdaae37 280 for (; space; space--)
924aaf3e 281 strbuf_addch(&cf->value, ' ');
17712991
LT
282 if (c == '\\') {
283 c = get_next_char();
284 switch (c) {
285 case '\n':
286 continue;
287 case 't':
288 c = '\t';
289 break;
290 case 'b':
291 c = '\b';
292 break;
293 case 'n':
294 c = '\n';
295 break;
5cbb401d
LT
296 /* Some characters escape as themselves */
297 case '\\': case '"':
298 break;
299 /* Reject unknown escape sequences */
300 default:
301 return NULL;
17712991 302 }
924aaf3e 303 strbuf_addch(&cf->value, c);
17712991
LT
304 continue;
305 }
306 if (c == '"') {
307 quote = 1-quote;
308 continue;
309 }
924aaf3e 310 strbuf_addch(&cf->value, c);
17712991
LT
311 }
312}
313
38c5afa8
LT
314static inline int iskeychar(int c)
315{
316 return isalnum(c) || c == '-';
317}
318
0971e992 319static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
320{
321 int c;
322 char *value;
b3b3f60b 323 int ret;
17712991
LT
324
325 /* Get the full name */
326 for (;;) {
327 c = get_next_char();
924aaf3e 328 if (cf->eof)
17712991 329 break;
38c5afa8 330 if (!iskeychar(c))
17712991 331 break;
0971e992 332 strbuf_addch(name, tolower(c));
17712991 333 }
0971e992 334
17712991
LT
335 while (c == ' ' || c == '\t')
336 c = get_next_char();
337
338 value = NULL;
339 if (c != '\n') {
340 if (c != '=')
341 return -1;
342 value = parse_value();
343 if (!value)
344 return -1;
345 }
b3b3f60b
MM
346 /*
347 * We already consumed the \n, but we need linenr to point to
348 * the line we just parsed during the call to fn to get
349 * accurate line number in error messages.
350 */
351 cf->linenr--;
352 ret = fn(name->buf, value, data);
353 cf->linenr++;
354 return ret;
17712991
LT
355}
356
0971e992 357static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
358{
359 do {
360 if (c == '\n')
4b340593 361 goto error_incomplete_line;
d14f7764
LT
362 c = get_next_char();
363 } while (isspace(c));
364
365 /* We require the format to be '[base "extension"]' */
366 if (c != '"')
367 return -1;
0971e992 368 strbuf_addch(name, '.');
d14f7764
LT
369
370 for (;;) {
371 int c = get_next_char();
372 if (c == '\n')
4b340593 373 goto error_incomplete_line;
d14f7764
LT
374 if (c == '"')
375 break;
376 if (c == '\\') {
377 c = get_next_char();
378 if (c == '\n')
4b340593 379 goto error_incomplete_line;
d14f7764 380 }
0971e992 381 strbuf_addch(name, c);
d14f7764
LT
382 }
383
384 /* Final ']' */
385 if (get_next_char() != ']')
386 return -1;
0971e992 387 return 0;
4b340593
MS
388error_incomplete_line:
389 cf->linenr--;
390 return -1;
d14f7764
LT
391}
392
0971e992 393static int get_base_var(struct strbuf *name)
17712991 394{
17712991
LT
395 for (;;) {
396 int c = get_next_char();
924aaf3e 397 if (cf->eof)
17712991
LT
398 return -1;
399 if (c == ']')
0971e992 400 return 0;
d14f7764 401 if (isspace(c))
0971e992 402 return get_extended_base_var(name, c);
38c5afa8 403 if (!iskeychar(c) && c != '.')
17712991 404 return -1;
0971e992 405 strbuf_addch(name, tolower(c));
17712991
LT
406 }
407}
408
4d8dd149 409static int git_parse_source(config_fn_t fn, void *data)
17712991
LT
410{
411 int comment = 0;
412 int baselen = 0;
0971e992 413 struct strbuf *var = &cf->var;
17712991 414
de056402
PB
415 /* U+FEFF Byte Order Mark in UTF8 */
416 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
417 const unsigned char *bomptr = utf8_bom;
418
17712991
LT
419 for (;;) {
420 int c = get_next_char();
de056402
PB
421 if (bomptr && *bomptr) {
422 /* We are at the file beginning; skip UTF8-encoded BOM
423 * if present. Sane editors won't put this in on their
424 * own, but e.g. Windows Notepad will do it happily. */
425 if ((unsigned char) c == *bomptr) {
426 bomptr++;
427 continue;
428 } else {
429 /* Do not tolerate partial BOM. */
430 if (bomptr != utf8_bom)
431 break;
432 /* No BOM at file beginning. Cool. */
433 bomptr = NULL;
434 }
435 }
17712991 436 if (c == '\n') {
924aaf3e 437 if (cf->eof)
17712991
LT
438 return 0;
439 comment = 0;
440 continue;
441 }
442 if (comment || isspace(c))
443 continue;
444 if (c == '#' || c == ';') {
445 comment = 1;
446 continue;
447 }
448 if (c == '[') {
0971e992
BW
449 /* Reset prior to determining a new stem */
450 strbuf_reset(var);
451 if (get_base_var(var) < 0 || var->len < 1)
17712991 452 break;
0971e992
BW
453 strbuf_addch(var, '.');
454 baselen = var->len;
17712991
LT
455 continue;
456 }
457 if (!isalpha(c))
458 break;
0971e992
BW
459 /*
460 * Truncate the var name back to the section header
461 * stem prior to grabbing the suffix part of the name
462 * and the value.
463 */
464 strbuf_setlen(var, baselen);
465 strbuf_addch(var, tolower(c));
466 if (get_value(fn, data, var) < 0)
17712991
LT
467 break;
468 }
b2dc0945 469 if (cf->die_on_error)
8262aaa2 470 die(_("bad config file line %d in %s"), cf->linenr, cf->name);
b2dc0945 471 else
8262aaa2 472 return error(_("bad config file line %d in %s"), cf->linenr, cf->name);
17712991
LT
473}
474
ebaa1bd4 475static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
476{
477 if (!*end)
478 return 1;
c8deb5a1
SP
479 else if (!strcasecmp(end, "k")) {
480 *val *= 1024;
481 return 1;
482 }
483 else if (!strcasecmp(end, "m")) {
484 *val *= 1024 * 1024;
485 return 1;
486 }
487 else if (!strcasecmp(end, "g")) {
488 *val *= 1024 * 1024 * 1024;
489 return 1;
490 }
491 return 0;
0b87b6e0
BD
492}
493
7192777d 494static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
0b87b6e0
BD
495{
496 if (value && *value) {
497 char *end;
ebaa1bd4
NA
498 intmax_t val;
499 uintmax_t uval;
500 uintmax_t factor = 1;
501
502 errno = 0;
503 val = strtoimax(value, &end, 0);
504 if (errno == ERANGE)
505 return 0;
33fdd77e
JK
506 if (!parse_unit_factor(end, &factor)) {
507 errno = EINVAL;
c8deb5a1 508 return 0;
33fdd77e 509 }
ebaa1bd4
NA
510 uval = abs(val);
511 uval *= factor;
33fdd77e
JK
512 if (uval > max || abs(val) > uval) {
513 errno = ERANGE;
ebaa1bd4 514 return 0;
33fdd77e 515 }
ebaa1bd4
NA
516 val *= factor;
517 *ret = val;
0b87b6e0
BD
518 return 1;
519 }
33fdd77e 520 errno = EINVAL;
0b87b6e0
BD
521 return 0;
522}
523
0b4dc661 524static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
17712991
LT
525{
526 if (value && *value) {
527 char *end;
ebaa1bd4
NA
528 uintmax_t val;
529 uintmax_t oldval;
530
531 errno = 0;
532 val = strtoumax(value, &end, 0);
533 if (errno == ERANGE)
534 return 0;
535 oldval = val;
33fdd77e
JK
536 if (!parse_unit_factor(end, &val)) {
537 errno = EINVAL;
c8deb5a1 538 return 0;
33fdd77e
JK
539 }
540 if (val > max || oldval > val) {
541 errno = ERANGE;
ebaa1bd4 542 return 0;
33fdd77e 543 }
c8deb5a1 544 *ret = val;
0b87b6e0 545 return 1;
17712991 546 }
33fdd77e 547 errno = EINVAL;
0b87b6e0
BD
548 return 0;
549}
550
42d194e9 551static int git_parse_int(const char *value, int *ret)
c1867cea 552{
7192777d 553 intmax_t tmp;
42d194e9 554 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
7192777d
JK
555 return 0;
556 *ret = tmp;
557 return 1;
558}
559
00160242
JK
560static int git_parse_int64(const char *value, int64_t *ret)
561{
562 intmax_t tmp;
563 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
564 return 0;
565 *ret = tmp;
566 return 1;
567}
568
7192777d
JK
569int git_parse_ulong(const char *value, unsigned long *ret)
570{
571 uintmax_t tmp;
572 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
573 return 0;
574 *ret = tmp;
575 return 1;
576}
577
06bdc23b 578NORETURN
2f666581 579static void die_bad_number(const char *name, const char *value)
c1867cea 580{
2f666581
JK
581 const char *reason = errno == ERANGE ?
582 "out of range" :
583 "invalid unit";
584 if (!value)
585 value = "";
586
924aaf3e 587 if (cf && cf->name)
8262aaa2 588 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
2f666581 589 value, name, cf->name, reason);
8262aaa2 590 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
c1867cea
JK
591}
592
0b87b6e0
BD
593int git_config_int(const char *name, const char *value)
594{
42d194e9
JK
595 int ret;
596 if (!git_parse_int(value, &ret))
2f666581 597 die_bad_number(name, value);
0b87b6e0
BD
598 return ret;
599}
600
00160242
JK
601int64_t git_config_int64(const char *name, const char *value)
602{
603 int64_t ret;
604 if (!git_parse_int64(value, &ret))
605 die_bad_number(name, value);
0b87b6e0
BD
606 return ret;
607}
608
609unsigned long git_config_ulong(const char *name, const char *value)
610{
611 unsigned long ret;
612 if (!git_parse_ulong(value, &ret))
2f666581 613 die_bad_number(name, value);
0b87b6e0 614 return ret;
17712991
LT
615}
616
b2be2f6a 617static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
618{
619 if (!value)
620 return 1;
621 if (!*value)
622 return 0;
8420ccd8
JH
623 if (!strcasecmp(value, "true")
624 || !strcasecmp(value, "yes")
625 || !strcasecmp(value, "on"))
17712991 626 return 1;
8420ccd8
JH
627 if (!strcasecmp(value, "false")
628 || !strcasecmp(value, "no")
629 || !strcasecmp(value, "off"))
17712991 630 return 0;
8420ccd8
JH
631 return -1;
632}
633
b2be2f6a
JK
634int git_config_maybe_bool(const char *name, const char *value)
635{
42d194e9 636 int v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
637 if (0 <= v)
638 return v;
42d194e9 639 if (git_parse_int(value, &v))
db6195ef 640 return !!v;
b2be2f6a
JK
641 return -1;
642}
643
8420ccd8
JH
644int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
645{
b2be2f6a 646 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
647 if (0 <= v) {
648 *is_bool = 1;
649 return v;
650 }
a53f2ec6 651 *is_bool = 0;
c35b0b58 652 return git_config_int(name, value);
17712991
LT
653}
654
a53f2ec6
JH
655int git_config_bool(const char *name, const char *value)
656{
657 int discard;
c35b0b58 658 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
659}
660
ea5105a5
CC
661int git_config_string(const char **dest, const char *var, const char *value)
662{
663 if (!value)
664 return config_error_nonbool(var);
665 *dest = xstrdup(value);
666 return 0;
667}
668
395de250
MM
669int git_config_pathname(const char **dest, const char *var, const char *value)
670{
671 if (!value)
672 return config_error_nonbool(var);
673 *dest = expand_user_path(value);
674 if (!*dest)
8262aaa2 675 die(_("failed to expand user dir in: '%s'"), value);
395de250
MM
676 return 0;
677}
678
806e2ad7 679static int git_default_core_config(const char *var, const char *value)
17712991
LT
680{
681 /* This needs a better name */
682 if (!strcmp(var, "core.filemode")) {
683 trust_executable_bit = git_config_bool(var, value);
684 return 0;
685 }
1ce4790b
AR
686 if (!strcmp(var, "core.trustctime")) {
687 trust_ctime = git_config_bool(var, value);
688 return 0;
689 }
c1b5d738 690 if (!strcmp(var, "core.checkstat")) {
c08e4d5b
RR
691 if (!strcasecmp(value, "default"))
692 check_stat = 1;
693 else if (!strcasecmp(value, "minimal"))
694 check_stat = 0;
695 }
17712991 696
9378c161
JH
697 if (!strcmp(var, "core.quotepath")) {
698 quote_path_fully = git_config_bool(var, value);
699 return 0;
700 }
701
78a8d641
JS
702 if (!strcmp(var, "core.symlinks")) {
703 has_symlinks = git_config_bool(var, value);
704 return 0;
705 }
706
0a9b88b7
LT
707 if (!strcmp(var, "core.ignorecase")) {
708 ignore_case = git_config_bool(var, value);
709 return 0;
710 }
711
64589a03
JH
712 if (!strcmp(var, "core.attributesfile"))
713 return git_config_pathname(&git_attributes_file, var, value);
714
7d1864ce
JH
715 if (!strcmp(var, "core.bare")) {
716 is_bare_repository_cfg = git_config_bool(var, value);
717 return 0;
718 }
719
5f73076c
JH
720 if (!strcmp(var, "core.ignorestat")) {
721 assume_unchanged = git_config_bool(var, value);
722 return 0;
723 }
724
e388c738
JH
725 if (!strcmp(var, "core.prefersymlinkrefs")) {
726 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
727 return 0;
728 }
729
6de08ae6
SP
730 if (!strcmp(var, "core.logallrefupdates")) {
731 log_all_ref_updates = git_config_bool(var, value);
732 return 0;
733 }
734
2f8acdb3
JH
735 if (!strcmp(var, "core.warnambiguousrefs")) {
736 warn_ambiguous_refs = git_config_bool(var, value);
737 return 0;
738 }
739
a71f09fe 740 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
741 int abbrev = git_config_int(var, value);
742 if (abbrev < minimum_abbrev || abbrev > 40)
743 return -1;
744 default_abbrev = abbrev;
745 return 0;
746 }
747
960ccca6 748 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
749 int level = git_config_int(var, value);
750 if (level == -1)
751 level = Z_DEFAULT_COMPRESSION;
752 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 753 die(_("bad zlib compression level %d"), level);
12f6c308 754 zlib_compression_level = level;
960ccca6
DH
755 zlib_compression_seen = 1;
756 return 0;
757 }
758
759 if (!strcmp(var, "core.compression")) {
760 int level = git_config_int(var, value);
761 if (level == -1)
762 level = Z_DEFAULT_COMPRESSION;
763 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 764 die(_("bad zlib compression level %d"), level);
960ccca6
DH
765 core_compression_level = level;
766 core_compression_seen = 1;
767 if (!zlib_compression_seen)
768 zlib_compression_level = level;
12f6c308
JBH
769 return 0;
770 }
771
60bb8b14 772 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 773 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 774 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
775
776 /* This value must be multiple of (pagesize * 2) */
777 packed_git_window_size /= pgsz_x2;
778 if (packed_git_window_size < 1)
779 packed_git_window_size = 1;
780 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
781 return 0;
782 }
783
15366280 784 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 785 big_file_threshold = git_config_ulong(var, value);
15366280
JH
786 return 0;
787 }
788
77ccc5bb 789 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 790 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
791 return 0;
792 }
793
18bdec11 794 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 795 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
796 return 0;
797 }
798
6c510bee 799 if (!strcmp(var, "core.autocrlf")) {
d7f46334 800 if (value && !strcasecmp(value, "input")) {
ec70f52f 801 if (core_eol == EOL_CRLF)
942e7747 802 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 803 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
804 return 0;
805 }
6c510bee
LT
806 auto_crlf = git_config_bool(var, value);
807 return 0;
808 }
809
21e5ad50
SP
810 if (!strcmp(var, "core.safecrlf")) {
811 if (value && !strcasecmp(value, "warn")) {
812 safe_crlf = SAFE_CRLF_WARN;
813 return 0;
814 }
815 safe_crlf = git_config_bool(var, value);
816 return 0;
817 }
818
942e7747
EB
819 if (!strcmp(var, "core.eol")) {
820 if (value && !strcasecmp(value, "lf"))
ec70f52f 821 core_eol = EOL_LF;
942e7747 822 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 823 core_eol = EOL_CRLF;
942e7747 824 else if (value && !strcasecmp(value, "native"))
ec70f52f 825 core_eol = EOL_NATIVE;
942e7747 826 else
ec70f52f
JH
827 core_eol = EOL_UNSET;
828 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
829 return error("core.autocrlf=input conflicts with core.eol=crlf");
830 return 0;
831 }
832
a97a7468
JS
833 if (!strcmp(var, "core.notesref")) {
834 notes_ref_name = xstrdup(value);
835 return 0;
836 }
837
806e2ad7
LT
838 if (!strcmp(var, "core.pager"))
839 return git_config_string(&pager_program, var, value);
840
841 if (!strcmp(var, "core.editor"))
842 return git_config_string(&editor_program, var, value);
843
eff80a9f
JH
844 if (!strcmp(var, "core.commentchar")) {
845 const char *comment;
846 int ret = git_config_string(&comment, var, value);
50b54fd7
NTND
847 if (ret)
848 return ret;
84c9dc2c
NTND
849 else if (!strcasecmp(comment, "auto"))
850 auto_comment_line_char = 1;
50b54fd7 851 else if (comment[0] && !comment[1]) {
eff80a9f 852 comment_line_char = comment[0];
84c9dc2c 853 auto_comment_line_char = 0;
50b54fd7
NTND
854 } else
855 return error("core.commentChar should only be one character");
856 return 0;
eff80a9f
JH
857 }
858
d3e7da89
AK
859 if (!strcmp(var, "core.askpass"))
860 return git_config_string(&askpass_program, var, value);
861
806e2ad7 862 if (!strcmp(var, "core.excludesfile"))
395de250 863 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
864
865 if (!strcmp(var, "core.whitespace")) {
866 if (!value)
867 return config_error_nonbool(var);
868 whitespace_rule_cfg = parse_whitespace_rule(value);
869 return 0;
870 }
871
aafe9fba
LT
872 if (!strcmp(var, "core.fsyncobjectfiles")) {
873 fsync_object_files = git_config_bool(var, value);
874 return 0;
875 }
876
671c9b7e
LT
877 if (!strcmp(var, "core.preloadindex")) {
878 core_preload_index = git_config_bool(var, value);
879 return 0;
880 }
881
348df166
JS
882 if (!strcmp(var, "core.createobject")) {
883 if (!strcmp(value, "rename"))
884 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
885 else if (!strcmp(value, "link"))
886 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
887 else
8262aaa2 888 die(_("invalid mode for object creation: %s"), value);
be66a6c4
JS
889 return 0;
890 }
891
08aefc9e
NTND
892 if (!strcmp(var, "core.sparsecheckout")) {
893 core_apply_sparse_checkout = git_config_bool(var, value);
894 return 0;
895 }
896
76759c7d
TB
897 if (!strcmp(var, "core.precomposeunicode")) {
898 precomposed_unicode = git_config_bool(var, value);
899 return 0;
900 }
901
806e2ad7
LT
902 /* Add other config variables here and to Documentation/config.txt. */
903 return 0;
904}
905
1141f492 906static int git_default_i18n_config(const char *var, const char *value)
d1364529 907{
ea5105a5
CC
908 if (!strcmp(var, "i18n.commitencoding"))
909 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 910
ea5105a5
CC
911 if (!strcmp(var, "i18n.logoutputencoding"))
912 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 913
1141f492
LT
914 /* Add other config variables here and to Documentation/config.txt. */
915 return 0;
916}
039bc64e 917
1141f492
LT
918static int git_default_branch_config(const char *var, const char *value)
919{
9ed36cfa
JS
920 if (!strcmp(var, "branch.autosetupmerge")) {
921 if (value && !strcasecmp(value, "always")) {
922 git_branch_track = BRANCH_TRACK_ALWAYS;
923 return 0;
924 }
925 git_branch_track = git_config_bool(var, value);
926 return 0;
927 }
c998ae9b
DS
928 if (!strcmp(var, "branch.autosetuprebase")) {
929 if (!value)
930 return config_error_nonbool(var);
931 else if (!strcmp(value, "never"))
932 autorebase = AUTOREBASE_NEVER;
933 else if (!strcmp(value, "local"))
934 autorebase = AUTOREBASE_LOCAL;
935 else if (!strcmp(value, "remote"))
936 autorebase = AUTOREBASE_REMOTE;
937 else if (!strcmp(value, "always"))
938 autorebase = AUTOREBASE_ALWAYS;
939 else
940 return error("Malformed value for %s", var);
941 return 0;
942 }
a9cc857a 943
1ab661dd 944 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
945 return 0;
946}
947
52153747
FAG
948static int git_default_push_config(const char *var, const char *value)
949{
950 if (!strcmp(var, "push.default")) {
951 if (!value)
952 return config_error_nonbool(var);
953 else if (!strcmp(value, "nothing"))
954 push_default = PUSH_DEFAULT_NOTHING;
955 else if (!strcmp(value, "matching"))
956 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
957 else if (!strcmp(value, "simple"))
958 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
959 else if (!strcmp(value, "upstream"))
960 push_default = PUSH_DEFAULT_UPSTREAM;
961 else if (!strcmp(value, "tracking")) /* deprecated */
962 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
963 else if (!strcmp(value, "current"))
964 push_default = PUSH_DEFAULT_CURRENT;
965 else {
966 error("Malformed value for %s: %s", var, value);
b55e6775
MM
967 return error("Must be one of nothing, matching, simple, "
968 "upstream or current.");
52153747
FAG
969 }
970 return 0;
971 }
972
973 /* Add other config variables here and to Documentation/config.txt. */
974 return 0;
975}
976
d551a488
MSO
977static int git_default_mailmap_config(const char *var, const char *value)
978{
979 if (!strcmp(var, "mailmap.file"))
9352fd57 980 return git_config_pathname(&git_mailmap_file, var, value);
08610900
JK
981 if (!strcmp(var, "mailmap.blob"))
982 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
983
984 /* Add other config variables here and to Documentation/config.txt. */
985 return 0;
986}
987
1141f492
LT
988int git_default_config(const char *var, const char *value, void *dummy)
989{
59556548 990 if (starts_with(var, "core."))
1141f492
LT
991 return git_default_core_config(var, value);
992
59556548 993 if (starts_with(var, "user."))
9597921b 994 return git_ident_config(var, value, dummy);
1141f492 995
59556548 996 if (starts_with(var, "i18n."))
1141f492
LT
997 return git_default_i18n_config(var, value);
998
59556548 999 if (starts_with(var, "branch."))
1141f492
LT
1000 return git_default_branch_config(var, value);
1001
59556548 1002 if (starts_with(var, "push."))
52153747
FAG
1003 return git_default_push_config(var, value);
1004
59556548 1005 if (starts_with(var, "mailmap."))
d551a488
MSO
1006 return git_default_mailmap_config(var, value);
1007
59556548 1008 if (starts_with(var, "advice."))
75194438
JK
1009 return git_default_advice_config(var, value);
1010
1141f492
LT
1011 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1012 pager_use_color = git_config_bool(var,value);
1013 return 0;
1014 }
1015
568508e7
JH
1016 if (!strcmp(var, "pack.packsizelimit")) {
1017 pack_size_limit_cfg = git_config_ulong(var, value);
1018 return 0;
1019 }
1141f492
LT
1020 /* Add other config variables here and to Documentation/config.txt. */
1021 return 0;
1022}
1023
ca4b5de2 1024/*
b2dc0945 1025 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 1026 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
1027 * this function.
1028 */
4d8dd149 1029static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
1030{
1031 int ret;
1032
1033 /* push config-file parsing state stack */
1034 top->prev = cf;
1035 top->linenr = 1;
1036 top->eof = 0;
1037 strbuf_init(&top->value, 1024);
1038 strbuf_init(&top->var, 1024);
1039 cf = top;
1040
4d8dd149 1041 ret = git_parse_source(fn, data);
ca4b5de2
HV
1042
1043 /* pop config-file parsing state stack */
1044 strbuf_release(&top->value);
1045 strbuf_release(&top->var);
1046 cf = top->prev;
1047
1048 return ret;
1049}
1050
3caec73b
KS
1051static int do_config_from_file(config_fn_t fn,
1052 const char *name, const char *path, FILE *f, void *data)
17712991 1053{
3caec73b 1054 struct config_source top;
17712991 1055
3caec73b
KS
1056 top.u.file = f;
1057 top.name = name;
1058 top.path = path;
1059 top.die_on_error = 1;
1060 top.do_fgetc = config_file_fgetc;
1061 top.do_ungetc = config_file_ungetc;
1062 top.do_ftell = config_file_ftell;
924aaf3e 1063
3caec73b
KS
1064 return do_config_from(&top, fn, data);
1065}
924aaf3e 1066
3caec73b
KS
1067static int git_config_from_stdin(config_fn_t fn, void *data)
1068{
1069 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1070}
1071
1072int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1073{
1074 int ret = -1;
1075 FILE *f;
924aaf3e 1076
3caec73b
KS
1077 f = fopen(filename, "r");
1078 if (f) {
1079 ret = do_config_from_file(fn, filename, filename, f, data);
17712991
LT
1080 fclose(f);
1081 }
1082 return ret;
1083}
10bea152 1084
1bc88819
HV
1085int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1086 size_t len, void *data)
1087{
1088 struct config_source top;
1089
1090 top.u.buf.buf = buf;
1091 top.u.buf.len = len;
1092 top.u.buf.pos = 0;
1093 top.name = name;
d14d4244 1094 top.path = NULL;
b2dc0945 1095 top.die_on_error = 0;
49d6cfa5
JK
1096 top.do_fgetc = config_buf_fgetc;
1097 top.do_ungetc = config_buf_ungetc;
1098 top.do_ftell = config_buf_ftell;
1bc88819
HV
1099
1100 return do_config_from(&top, fn, data);
1101}
1102
1103static int git_config_from_blob_sha1(config_fn_t fn,
1104 const char *name,
1105 const unsigned char *sha1,
1106 void *data)
1107{
1108 enum object_type type;
1109 char *buf;
1110 unsigned long size;
1111 int ret;
1112
1113 buf = read_sha1_file(sha1, &type, &size);
1114 if (!buf)
1115 return error("unable to load config blob object '%s'", name);
1116 if (type != OBJ_BLOB) {
1117 free(buf);
1118 return error("reference '%s' does not point to a blob", name);
1119 }
1120
1121 ret = git_config_from_buf(fn, name, buf, size, data);
1122 free(buf);
1123
1124 return ret;
1125}
1126
1127static int git_config_from_blob_ref(config_fn_t fn,
1128 const char *name,
1129 void *data)
1130{
1131 unsigned char sha1[20];
1132
1133 if (get_sha1(name, sha1) < 0)
1134 return error("unable to resolve config blob '%s'", name);
1135 return git_config_from_blob_sha1(fn, name, sha1, data);
1136}
1137
506b17b1
JS
1138const char *git_etc_gitconfig(void)
1139{
7f0e39fa 1140 static const char *system_wide;
2de9de5e
SP
1141 if (!system_wide)
1142 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1143 return system_wide;
506b17b1
JS
1144}
1145
0ef37164 1146int git_env_bool(const char *k, int def)
ab88c363
JK
1147{
1148 const char *v = getenv(k);
1149 return v ? git_config_bool(k, v) : def;
1150}
1151
1152int git_config_system(void)
1153{
1154 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1155}
1156
dbdf5854 1157int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1158{
aa387407 1159 int ret = 0, found = 0;
21cf3227
HKNN
1160 char *xdg_config = NULL;
1161 char *user_config = NULL;
1162
1163 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 1164
4698c8fe 1165 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1166 ret += git_config_from_file(fn, git_etc_gitconfig(),
1167 data);
aa387407
FC
1168 found += 1;
1169 }
5f1a63e0 1170
4698c8fe 1171 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1172 ret += git_config_from_file(fn, xdg_config, data);
1173 found += 1;
1174 }
1175
4698c8fe 1176 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1177 ret += git_config_from_file(fn, user_config, data);
1178 found += 1;
5f1a63e0
JS
1179 }
1180
4698c8fe 1181 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1182 ret += git_config_from_file(fn, repo_config, data);
1183 found += 1;
1184 }
8b1fa778 1185
5a0c9eeb
JK
1186 switch (git_config_from_parameters(fn, data)) {
1187 case -1: /* error */
8262aaa2 1188 die(_("unable to parse command-line config"));
5a0c9eeb
JK
1189 break;
1190 case 0: /* found nothing */
1191 break;
1192 default: /* found at least one item */
1193 found++;
1194 break;
1195 }
8b1fa778 1196
21cf3227
HKNN
1197 free(xdg_config);
1198 free(user_config);
1f2baa78 1199 return ret == 0 ? found : ret;
4f629539
JH
1200}
1201
c9b5e2a5 1202int git_config_with_options(config_fn_t fn, void *data,
c8985ce0 1203 struct git_config_source *config_source,
1bc88819 1204 int respect_includes)
dbdf5854
NTND
1205{
1206 char *repo_config = NULL;
1207 int ret;
9b25a0b5
JK
1208 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1209
1210 if (respect_includes) {
1211 inc.fn = fn;
1212 inc.data = data;
1213 fn = git_config_include;
1214 data = &inc;
1215 }
dbdf5854 1216
c9b5e2a5
JK
1217 /*
1218 * If we have a specific filename, use it. Otherwise, follow the
1219 * regular lookup sequence.
1220 */
3caec73b
KS
1221 if (config_source && config_source->use_stdin)
1222 return git_config_from_stdin(fn, data);
1223 else if (config_source && config_source->file)
c8985ce0
KS
1224 return git_config_from_file(fn, config_source->file, data);
1225 else if (config_source && config_source->blob)
1226 return git_config_from_blob_ref(fn, config_source->blob, data);
c9b5e2a5 1227
dbdf5854
NTND
1228 repo_config = git_pathdup("config");
1229 ret = git_config_early(fn, data, repo_config);
1230 if (repo_config)
1231 free(repo_config);
1232 return ret;
1233}
1234
aace4385 1235void git_config(config_fn_t fn, void *data)
c9b5e2a5 1236{
aace4385
TA
1237 if (git_config_with_options(fn, data, NULL, 1) < 0)
1238 /*
1239 * git_config_with_options() normally returns only
1240 * positive values, as most errors are fatal, and
1241 * non-fatal potential errors are guarded by "if"
1242 * statements that are entered only when no error is
1243 * possible.
1244 *
1245 * If we ever encounter a non-fatal error, it means
1246 * something went really wrong and we should stop
1247 * immediately.
1248 */
1249 die(_("unknown error occured while reading the configuration files"));
c9b5e2a5
JK
1250}
1251
3c8687a7
TA
1252static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1253{
1254 struct config_set_element k;
1255 struct config_set_element *found_entry;
1256 char *normalized_key;
1257 int ret;
1258 /*
1259 * `key` may come from the user, so normalize it before using it
1260 * for querying entries from the hashmap.
1261 */
1262 ret = git_config_parse_key(key, &normalized_key, NULL);
1263
1264 if (ret)
1265 return NULL;
1266
1267 hashmap_entry_init(&k, strhash(normalized_key));
1268 k.key = normalized_key;
1269 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1270 free(normalized_key);
1271 return found_entry;
1272}
1273
1274static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1275{
1276 struct config_set_element *e;
3df8fd62
TA
1277 struct string_list_item *si;
1278 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1279
3c8687a7
TA
1280 e = configset_find_element(cs, key);
1281 /*
1282 * Since the keys are being fed by git_config*() callback mechanism, they
1283 * are already normalized. So simply add them without any further munging.
1284 */
1285 if (!e) {
1286 e = xmalloc(sizeof(*e));
1287 hashmap_entry_init(e, strhash(key));
1288 e->key = xstrdup(key);
1289 string_list_init(&e->value_list, 1);
1290 hashmap_add(&cs->config_hash, e);
1291 }
3df8fd62
TA
1292 si = string_list_append_nodup(&e->value_list, value ? xstrdup(value) : NULL);
1293 if (cf) {
1294 kv_info->filename = strintern(cf->name);
1295 kv_info->linenr = cf->linenr;
1296 } else {
1297 /* for values read from `git_config_from_parameters()` */
1298 kv_info->filename = NULL;
1299 kv_info->linenr = -1;
1300 }
1301 si->util = kv_info;
3c8687a7
TA
1302
1303 return 0;
1304}
1305
1306static int config_set_element_cmp(const struct config_set_element *e1,
1307 const struct config_set_element *e2, const void *unused)
1308{
1309 return strcmp(e1->key, e2->key);
1310}
1311
1312void git_configset_init(struct config_set *cs)
1313{
1314 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1315 cs->hash_initialized = 1;
1316}
1317
1318void git_configset_clear(struct config_set *cs)
1319{
1320 struct config_set_element *entry;
1321 struct hashmap_iter iter;
1322 if (!cs->hash_initialized)
1323 return;
1324
1325 hashmap_iter_init(&cs->config_hash, &iter);
1326 while ((entry = hashmap_iter_next(&iter))) {
1327 free(entry->key);
3df8fd62 1328 string_list_clear(&entry->value_list, 1);
3c8687a7
TA
1329 }
1330 hashmap_free(&cs->config_hash, 1);
1331 cs->hash_initialized = 0;
1332}
1333
1334static int config_set_callback(const char *key, const char *value, void *cb)
1335{
1336 struct config_set *cs = cb;
1337 configset_add_value(cs, key, value);
1338 return 0;
1339}
1340
1341int git_configset_add_file(struct config_set *cs, const char *filename)
1342{
1343 return git_config_from_file(config_set_callback, filename, cs);
1344}
1345
1346int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1347{
1348 const struct string_list *values = NULL;
1349 /*
1350 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1351 * queried key in the files of the configset, the value returned will be the last
1352 * value in the value list for that key.
1353 */
1354 values = git_configset_get_value_multi(cs, key);
1355
1356 if (!values)
1357 return 1;
1358 assert(values->nr > 0);
1359 *value = values->items[values->nr - 1].string;
1360 return 0;
1361}
1362
1363const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1364{
1365 struct config_set_element *e = configset_find_element(cs, key);
1366 return e ? &e->value_list : NULL;
1367}
1368
1369int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1370{
1371 const char *value;
1372 if (!git_configset_get_value(cs, key, &value))
1373 return git_config_string(dest, key, value);
1374 else
1375 return 1;
1376}
1377
1378int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1379{
1380 return git_configset_get_string_const(cs, key, (const char **)dest);
1381}
1382
1383int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1384{
1385 const char *value;
1386 if (!git_configset_get_value(cs, key, &value)) {
1387 *dest = git_config_int(key, value);
1388 return 0;
1389 } else
1390 return 1;
1391}
1392
1393int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1394{
1395 const char *value;
1396 if (!git_configset_get_value(cs, key, &value)) {
1397 *dest = git_config_ulong(key, value);
1398 return 0;
1399 } else
1400 return 1;
1401}
1402
1403int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1404{
1405 const char *value;
1406 if (!git_configset_get_value(cs, key, &value)) {
1407 *dest = git_config_bool(key, value);
1408 return 0;
1409 } else
1410 return 1;
1411}
1412
1413int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1414 int *is_bool, int *dest)
1415{
1416 const char *value;
1417 if (!git_configset_get_value(cs, key, &value)) {
1418 *dest = git_config_bool_or_int(key, value, is_bool);
1419 return 0;
1420 } else
1421 return 1;
1422}
1423
1424int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1425{
1426 const char *value;
1427 if (!git_configset_get_value(cs, key, &value)) {
1428 *dest = git_config_maybe_bool(key, value);
1429 if (*dest == -1)
1430 return -1;
1431 return 0;
1432 } else
1433 return 1;
1434}
1435
1436int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1437{
1438 const char *value;
1439 if (!git_configset_get_value(cs, key, &value))
1440 return git_config_pathname(dest, key, value);
1441 else
1442 return 1;
1443}
1444
1445static void git_config_check_init(void)
1446{
1447 if (the_config_set.hash_initialized)
1448 return;
1449 git_configset_init(&the_config_set);
1450 git_config(config_set_callback, &the_config_set);
1451}
1452
1453void git_config_clear(void)
1454{
1455 if (!the_config_set.hash_initialized)
1456 return;
1457 git_configset_clear(&the_config_set);
1458}
1459
1460int git_config_get_value(const char *key, const char **value)
1461{
1462 git_config_check_init();
1463 return git_configset_get_value(&the_config_set, key, value);
1464}
1465
1466const struct string_list *git_config_get_value_multi(const char *key)
1467{
1468 git_config_check_init();
1469 return git_configset_get_value_multi(&the_config_set, key);
1470}
1471
1472int git_config_get_string_const(const char *key, const char **dest)
1473{
1474 git_config_check_init();
1475 return git_configset_get_string_const(&the_config_set, key, dest);
1476}
1477
1478int git_config_get_string(const char *key, char **dest)
1479{
1480 git_config_check_init();
1481 return git_config_get_string_const(key, (const char **)dest);
1482}
1483
1484int git_config_get_int(const char *key, int *dest)
1485{
1486 git_config_check_init();
1487 return git_configset_get_int(&the_config_set, key, dest);
1488}
1489
1490int git_config_get_ulong(const char *key, unsigned long *dest)
1491{
1492 git_config_check_init();
1493 return git_configset_get_ulong(&the_config_set, key, dest);
1494}
1495
1496int git_config_get_bool(const char *key, int *dest)
1497{
1498 git_config_check_init();
1499 return git_configset_get_bool(&the_config_set, key, dest);
1500}
1501
1502int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1503{
1504 git_config_check_init();
1505 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1506}
1507
1508int git_config_get_maybe_bool(const char *key, int *dest)
1509{
1510 git_config_check_init();
1511 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1512}
1513
1514int git_config_get_pathname(const char *key, const char **dest)
1515{
1516 git_config_check_init();
1517 return git_configset_get_pathname(&the_config_set, key, dest);
1518}
1519
10bea152
JS
1520/*
1521 * Find all the stuff for git_config_set() below.
1522 */
4ddba79d 1523
10bea152
JS
1524static struct {
1525 int baselen;
4b25d091 1526 char *key;
f98d863d 1527 int do_not_match;
4b25d091 1528 regex_t *value_regex;
4ddba79d 1529 int multi_replace;
83786fa4
TR
1530 size_t *offset;
1531 unsigned int offset_alloc;
10bea152
JS
1532 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1533 int seen;
1534} store;
1535
4b25d091 1536static int matches(const char *key, const char *value)
f98d863d
JS
1537{
1538 return !strcmp(key, store.key) &&
1539 (store.value_regex == NULL ||
1540 (store.do_not_match ^
1541 !regexec(store.value_regex, value, 0, NULL, 0)));
1542}
1543
4b25d091 1544static int store_aux(const char *key, const char *value, void *cb)
10bea152 1545{
ae9ee41d
JH
1546 const char *ep;
1547 size_t section_len;
1548
10bea152
JS
1549 switch (store.state) {
1550 case KEY_SEEN:
f98d863d 1551 if (matches(key, value)) {
4ddba79d 1552 if (store.seen == 1 && store.multi_replace == 0) {
8262aaa2 1553 warning(_("%s has multiple values"), key);
10bea152 1554 }
4ddba79d 1555
83786fa4
TR
1556 ALLOC_GROW(store.offset, store.seen + 1,
1557 store.offset_alloc);
1558
49d6cfa5 1559 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1560 store.seen++;
1561 }
1562 break;
1563 case SECTION_SEEN:
ae9ee41d
JH
1564 /*
1565 * What we are looking for is in store.key (both
1566 * section and var), and its section part is baselen
1567 * long. We found key (again, both section and var).
1568 * We would want to know if this key is in the same
1569 * section as what we are looking for. We already
1570 * know we are in the same section as what should
1571 * hold store.key.
1572 */
1573 ep = strrchr(key, '.');
1574 section_len = ep - key;
1575
1576 if ((section_len != store.baselen) ||
1577 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1578 store.state = SECTION_END_SEEN;
1579 break;
ae9ee41d
JH
1580 }
1581
1582 /*
1583 * Do not increment matches: this is no match, but we
1584 * just made sure we are in the desired section.
1585 */
83786fa4
TR
1586 ALLOC_GROW(store.offset, store.seen + 1,
1587 store.offset_alloc);
49d6cfa5 1588 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1589 /* fallthru */
1590 case SECTION_END_SEEN:
1591 case START:
f98d863d 1592 if (matches(key, value)) {
83786fa4
TR
1593 ALLOC_GROW(store.offset, store.seen + 1,
1594 store.offset_alloc);
49d6cfa5 1595 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1596 store.state = KEY_SEEN;
1597 store.seen++;
d14f7764
LT
1598 } else {
1599 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1600 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1601 store.state = SECTION_SEEN;
83786fa4
TR
1602 ALLOC_GROW(store.offset,
1603 store.seen + 1,
1604 store.offset_alloc);
49d6cfa5 1605 store.offset[store.seen] = cf->do_ftell(cf);
d14f7764 1606 }
bdf0ef08 1607 }
10bea152
JS
1608 }
1609 return 0;
1610}
1611
64c0d71c 1612static int write_error(const char *filename)
480c9e52 1613{
64c0d71c 1614 error("failed to write new configuration file %s", filename);
480c9e52
AW
1615
1616 /* Same error code as "failed to rename". */
1617 return 4;
1618}
1619
4b25d091 1620static int store_write_section(int fd, const char *key)
10bea152 1621{
cb891a59
KH
1622 const char *dot;
1623 int i, success;
f285a2d7 1624 struct strbuf sb = STRBUF_INIT;
d14f7764 1625
cb891a59 1626 dot = memchr(key, '.', store.baselen);
d14f7764 1627 if (dot) {
cb891a59
KH
1628 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1629 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1630 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1631 strbuf_addch(&sb, '\\');
1632 strbuf_addch(&sb, key[i]);
d14f7764 1633 }
cb891a59
KH
1634 strbuf_addstr(&sb, "\"]\n");
1635 } else {
1636 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1637 }
1638
cb891a59
KH
1639 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1640 strbuf_release(&sb);
480c9e52 1641
cb891a59 1642 return success;
10bea152
JS
1643}
1644
4b25d091 1645static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1646{
cb891a59
KH
1647 int i, success;
1648 int length = strlen(key + store.baselen + 1);
1649 const char *quote = "";
f285a2d7 1650 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1651
6281f394
JM
1652 /*
1653 * Check to see if the value needs to be surrounded with a dq pair.
1654 * Note that problematic characters are always backslash-quoted; this
1655 * check is about not losing leading or trailing SP and strings that
1656 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1657 * configuration parser.
1658 */
cdd4fb15 1659 if (value[0] == ' ')
cb891a59 1660 quote = "\"";
cdd4fb15
BG
1661 for (i = 0; value[i]; i++)
1662 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1663 quote = "\"";
1664 if (i && value[i - 1] == ' ')
1665 quote = "\"";
1666
cb891a59
KH
1667 strbuf_addf(&sb, "\t%.*s = %s",
1668 length, key + store.baselen + 1, quote);
10bea152 1669
10bea152
JS
1670 for (i = 0; value[i]; i++)
1671 switch (value[i]) {
480c9e52 1672 case '\n':
cb891a59 1673 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1674 break;
1675 case '\t':
cb891a59 1676 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1677 break;
1678 case '"':
1679 case '\\':
cb891a59 1680 strbuf_addch(&sb, '\\');
480c9e52 1681 default:
cb891a59 1682 strbuf_addch(&sb, value[i]);
480c9e52
AW
1683 break;
1684 }
cb891a59
KH
1685 strbuf_addf(&sb, "%s\n", quote);
1686
1687 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1688 strbuf_release(&sb);
1689
1690 return success;
10bea152
JS
1691}
1692
4b25d091
FC
1693static ssize_t find_beginning_of_line(const char *contents, size_t size,
1694 size_t offset_, int *found_bracket)
4ddba79d 1695{
dc49cd76
SP
1696 size_t equal_offset = size, bracket_offset = size;
1697 ssize_t offset;
4ddba79d 1698
7a31cc0f 1699contline:
a6080a0a 1700 for (offset = offset_-2; offset > 0
4ddba79d
JS
1701 && contents[offset] != '\n'; offset--)
1702 switch (contents[offset]) {
1703 case '=': equal_offset = offset; break;
1704 case ']': bracket_offset = offset; break;
1705 }
7a31cc0f
FL
1706 if (offset > 0 && contents[offset-1] == '\\') {
1707 offset_ = offset;
1708 goto contline;
1709 }
4ddba79d
JS
1710 if (bracket_offset < equal_offset) {
1711 *found_bracket = 1;
1712 offset = bracket_offset+1;
1713 } else
1714 offset++;
1715
1716 return offset;
1717}
1718
5ec31182
RR
1719int git_config_set_in_file(const char *config_filename,
1720 const char *key, const char *value)
1721{
1722 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1723}
1724
4b25d091 1725int git_config_set(const char *key, const char *value)
10bea152 1726{
4ddba79d 1727 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1728}
1729
b09c53a3
LP
1730/*
1731 * Auxiliary function to sanity-check and split the key into the section
1732 * identifier and variable name.
1733 *
1734 * Returns 0 on success, -1 when there is an invalid character in the key and
1735 * -2 if there is no section name in the key.
1736 *
1737 * store_key - pointer to char* which will hold a copy of the key with
1738 * lowercase section and variable name
1739 * baselen - pointer to int which will hold the length of the
1740 * section + subsection part, can be NULL
1741 */
1742int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1743{
1744 int i, dot, baselen;
1745 const char *last_dot = strrchr(key, '.');
1746
1747 /*
1748 * Since "key" actually contains the section name and the real
1749 * key name separated by a dot, we have to know where the dot is.
1750 */
1751
2169ddc0 1752 if (last_dot == NULL || last_dot == key) {
b09c53a3 1753 error("key does not contain a section: %s", key);
7a397419 1754 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1755 }
1756
2169ddc0
LP
1757 if (!last_dot[1]) {
1758 error("key does not contain variable name: %s", key);
7a397419 1759 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1760 }
1761
b09c53a3
LP
1762 baselen = last_dot - key;
1763 if (baselen_)
1764 *baselen_ = baselen;
1765
1766 /*
1767 * Validate the key and while at it, lower case it for matching.
1768 */
1769 *store_key = xmalloc(strlen(key) + 1);
1770
1771 dot = 0;
1772 for (i = 0; key[i]; i++) {
1773 unsigned char c = key[i];
1774 if (c == '.')
1775 dot = 1;
1776 /* Leave the extended basename untouched.. */
1777 if (!dot || i > baselen) {
1778 if (!iskeychar(c) ||
1779 (i == baselen + 1 && !isalpha(c))) {
1780 error("invalid key: %s", key);
1781 goto out_free_ret_1;
1782 }
1783 c = tolower(c);
1784 } else if (c == '\n') {
1785 error("invalid key (newline): %s", key);
1786 goto out_free_ret_1;
1787 }
1788 (*store_key)[i] = c;
1789 }
1790 (*store_key)[i] = 0;
1791
1792 return 0;
1793
1794out_free_ret_1:
1795 free(*store_key);
97ed50f9 1796 *store_key = NULL;
7a397419 1797 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1798}
1799
10bea152
JS
1800/*
1801 * If value==NULL, unset in (remove from) config,
1802 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1803 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1804 * else all matching key/values (regardless how many) are removed,
1805 * before the new pair is written.
10bea152
JS
1806 *
1807 * Returns 0 on success.
1808 *
1809 * This function does this:
1810 *
1811 * - it locks the config file by creating ".git/config.lock"
1812 *
1813 * - it then parses the config using store_aux() as validator to find
1814 * the position on the key/value pair to replace. If it is to be unset,
1815 * it must be found exactly once.
1816 *
1817 * - the config file is mmap()ed and the part before the match (if any) is
1818 * written to the lock file, then the changed part and the rest.
1819 *
1820 * - the config file is removed and the lock file rename()d to it.
1821 *
1822 */
5ec31182
RR
1823int git_config_set_multivar_in_file(const char *config_filename,
1824 const char *key, const char *value,
1825 const char *value_regex, int multi_replace)
10bea152 1826{
f8ba655e 1827 int fd = -1, in_fd;
dafc88b1 1828 int ret;
6cbf973c 1829 struct lock_file *lock = NULL;
0a5f5759 1830 char *filename_buf = NULL;
4ddba79d 1831
b09c53a3
LP
1832 /* parse-key returns negative; flip the sign to feed exit(3) */
1833 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1834 if (ret)
dafc88b1 1835 goto out_free;
b17e659d
JS
1836
1837 store.multi_replace = multi_replace;
10bea152 1838
0a5f5759
JK
1839 if (!config_filename)
1840 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1841
1842 /*
6cbf973c 1843 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1844 * contents of .git/config will be written into it.
1845 */
f1064f6b 1846 lock = xcalloc(1, sizeof(struct lock_file));
6cbf973c
BS
1847 fd = hold_lock_file_for_update(lock, config_filename, 0);
1848 if (fd < 0) {
6ffd567b 1849 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1850 free(store.key);
7a397419 1851 ret = CONFIG_NO_LOCK;
dafc88b1 1852 goto out_free;
10bea152
JS
1853 }
1854
1855 /*
1856 * If .git/config does not exist yet, write a minimal version.
1857 */
88fb958b
AR
1858 in_fd = open(config_filename, O_RDONLY);
1859 if ( in_fd < 0 ) {
10bea152
JS
1860 free(store.key);
1861
88fb958b
AR
1862 if ( ENOENT != errno ) {
1863 error("opening %s: %s", config_filename,
1864 strerror(errno));
7a397419 1865 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1866 goto out_free;
88fb958b 1867 }
10bea152
JS
1868 /* if nothing to unset, error out */
1869 if (value == NULL) {
7a397419 1870 ret = CONFIG_NOTHING_SET;
dafc88b1 1871 goto out_free;
10bea152
JS
1872 }
1873
4b25d091 1874 store.key = (char *)key;
480c9e52 1875 if (!store_write_section(fd, key) ||
93c1e079
JH
1876 !store_write_pair(fd, key, value))
1877 goto write_err_out;
1878 } else {
88fb958b 1879 struct stat st;
4b25d091 1880 char *contents;
dc49cd76
SP
1881 size_t contents_sz, copy_begin, copy_end;
1882 int i, new_line = 0;
10bea152
JS
1883
1884 if (value_regex == NULL)
1885 store.value_regex = NULL;
1886 else {
f98d863d
JS
1887 if (value_regex[0] == '!') {
1888 store.do_not_match = 1;
1889 value_regex++;
1890 } else
1891 store.do_not_match = 0;
1892
2d7320d0 1893 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1894 if (regcomp(store.value_regex, value_regex,
1895 REG_EXTENDED)) {
64c0d71c 1896 error("invalid pattern: %s", value_regex);
10bea152 1897 free(store.value_regex);
7a397419 1898 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1899 goto out_free;
10bea152
JS
1900 }
1901 }
1902
83786fa4 1903 ALLOC_GROW(store.offset, 1, store.offset_alloc);
4ddba79d 1904 store.offset[0] = 0;
10bea152
JS
1905 store.state = START;
1906 store.seen = 0;
1907
1908 /*
1909 * After this, store.offset will contain the *end* offset
1910 * of the last match, or remain at 0 if no match was found.
1911 * As a side effect, we make sure to transform only a valid
1912 * existing config file.
1913 */
ef90d6d4 1914 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1915 error("invalid config file %s", config_filename);
10bea152
JS
1916 free(store.key);
1917 if (store.value_regex != NULL) {
1918 regfree(store.value_regex);
1919 free(store.value_regex);
1920 }
7a397419 1921 ret = CONFIG_INVALID_FILE;
dafc88b1 1922 goto out_free;
10bea152
JS
1923 }
1924
1925 free(store.key);
1926 if (store.value_regex != NULL) {
1927 regfree(store.value_regex);
1928 free(store.value_regex);
1929 }
1930
4ddba79d
JS
1931 /* if nothing to unset, or too many matches, error out */
1932 if ((store.seen == 0 && value == NULL) ||
1933 (store.seen > 1 && multi_replace == 0)) {
7a397419 1934 ret = CONFIG_NOTHING_SET;
dafc88b1 1935 goto out_free;
10bea152
JS
1936 }
1937
88fb958b 1938 fstat(in_fd, &st);
dc49cd76
SP
1939 contents_sz = xsize_t(st.st_size);
1940 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1941 MAP_PRIVATE, in_fd, 0);
1942 close(in_fd);
1943
2569d239
KB
1944 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
1945 error("chmod on %s failed: %s",
daa22c6f
EW
1946 lock->filename, strerror(errno));
1947 ret = CONFIG_NO_WRITE;
1948 goto out_free;
1949 }
1950
4ddba79d
JS
1951 if (store.seen == 0)
1952 store.seen = 1;
1953
1954 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1955 if (store.offset[i] == 0) {
dc49cd76 1956 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1957 } else if (store.state != KEY_SEEN) {
1958 copy_end = store.offset[i];
10bea152 1959 } else
4ddba79d 1960 copy_end = find_beginning_of_line(
dc49cd76 1961 contents, contents_sz,
4ddba79d
JS
1962 store.offset[i]-2, &new_line);
1963
02e5ba4a
JK
1964 if (copy_end > 0 && contents[copy_end-1] != '\n')
1965 new_line = 1;
1966
4ddba79d
JS
1967 /* write the first part of the config */
1968 if (copy_end > copy_begin) {
93c1e079
JH
1969 if (write_in_full(fd, contents + copy_begin,
1970 copy_end - copy_begin) <
1971 copy_end - copy_begin)
1972 goto write_err_out;
1973 if (new_line &&
2b7ca830 1974 write_str_in_full(fd, "\n") != 1)
93c1e079 1975 goto write_err_out;
4ddba79d
JS
1976 }
1977 copy_begin = store.offset[i];
10bea152
JS
1978 }
1979
10bea152
JS
1980 /* write the pair (value == NULL means unset) */
1981 if (value != NULL) {
93c1e079
JH
1982 if (store.state == START) {
1983 if (!store_write_section(fd, key))
1984 goto write_err_out;
480c9e52 1985 }
93c1e079
JH
1986 if (!store_write_pair(fd, key, value))
1987 goto write_err_out;
10bea152
JS
1988 }
1989
1990 /* write the rest of the config */
dc49cd76 1991 if (copy_begin < contents_sz)
93c1e079 1992 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1993 contents_sz - copy_begin) <
1994 contents_sz - copy_begin)
93c1e079 1995 goto write_err_out;
10bea152 1996
dc49cd76 1997 munmap(contents, contents_sz);
10bea152
JS
1998 }
1999
4ed7cd3a 2000 if (commit_lock_file(lock) < 0) {
64c0d71c 2001 error("could not commit config file %s", config_filename);
7a397419 2002 ret = CONFIG_NO_WRITE;
dafc88b1 2003 goto out_free;
10bea152
JS
2004 }
2005
6cbf973c
BS
2006 /*
2007 * lock is committed, so don't try to roll it back below.
2008 * NOTE: Since lockfile.c keeps a linked list of all created
2009 * lock_file structures, it isn't safe to free(lock). It's
2010 * better to just leave it hanging around.
2011 */
2012 lock = NULL;
dafc88b1
SH
2013 ret = 0;
2014
3c8687a7
TA
2015 /* Invalidate the config cache */
2016 git_config_clear();
2017
dafc88b1 2018out_free:
6cbf973c
BS
2019 if (lock)
2020 rollback_lock_file(lock);
0a5f5759 2021 free(filename_buf);
dafc88b1 2022 return ret;
93c1e079
JH
2023
2024write_err_out:
64c0d71c 2025 ret = write_error(lock->filename);
93c1e079
JH
2026 goto out_free;
2027
10bea152
JS
2028}
2029
5ec31182
RR
2030int git_config_set_multivar(const char *key, const char *value,
2031 const char *value_regex, int multi_replace)
2032{
4a7bb5ba 2033 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 2034 multi_replace);
5ec31182
RR
2035}
2036
118f8b24
PB
2037static int section_name_match (const char *buf, const char *name)
2038{
2039 int i = 0, j = 0, dot = 0;
a4c0d463
AV
2040 if (buf[i] != '[')
2041 return 0;
2042 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
2043 if (!dot && isspace(buf[i])) {
2044 dot = 1;
2045 if (name[j++] != '.')
2046 break;
2047 for (i++; isspace(buf[i]); i++)
2048 ; /* do nothing */
2049 if (buf[i] != '"')
2050 break;
2051 continue;
2052 }
2053 if (buf[i] == '\\' && dot)
2054 i++;
2055 else if (buf[i] == '"' && dot) {
2056 for (i++; isspace(buf[i]); i++)
2057 ; /* do_nothing */
2058 break;
2059 }
2060 if (buf[i] != name[j++])
2061 break;
2062 }
a4c0d463
AV
2063 if (buf[i] == ']' && name[j] == 0) {
2064 /*
2065 * We match, now just find the right length offset by
2066 * gobbling up any whitespace after it, as well
2067 */
2068 i++;
2069 for (; buf[i] && isspace(buf[i]); i++)
2070 ; /* do nothing */
2071 return i;
2072 }
2073 return 0;
118f8b24
PB
2074}
2075
94a35b1a
JK
2076static int section_name_is_ok(const char *name)
2077{
2078 /* Empty section names are bogus. */
2079 if (!*name)
2080 return 0;
2081
2082 /*
2083 * Before a dot, we must be alphanumeric or dash. After the first dot,
2084 * anything goes, so we can stop checking.
2085 */
2086 for (; *name && *name != '.'; name++)
2087 if (*name != '-' && !isalnum(*name))
2088 return 0;
2089 return 1;
2090}
2091
118f8b24 2092/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
2093int git_config_rename_section_in_file(const char *config_filename,
2094 const char *old_name, const char *new_name)
0667fcfb 2095{
118f8b24 2096 int ret = 0, remove = 0;
42bd39b5 2097 char *filename_buf = NULL;
94a35b1a 2098 struct lock_file *lock;
0667fcfb
JS
2099 int out_fd;
2100 char buf[1024];
924aaf3e 2101 FILE *config_file;
daa22c6f 2102 struct stat st;
0667fcfb 2103
94a35b1a
JK
2104 if (new_name && !section_name_is_ok(new_name)) {
2105 ret = error("invalid section name: %s", new_name);
2106 goto out;
2107 }
2108
42bd39b5
JK
2109 if (!config_filename)
2110 config_filename = filename_buf = git_pathdup("config");
2111
f1064f6b 2112 lock = xcalloc(1, sizeof(struct lock_file));
0667fcfb 2113 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 2114 if (out_fd < 0) {
64c0d71c 2115 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
2116 goto out;
2117 }
0667fcfb 2118
fc1905bb 2119 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
2120 /* no config file means nothing to rename, no error */
2121 goto unlock_and_out;
fc1905bb 2122 }
0667fcfb 2123
daa22c6f
EW
2124 fstat(fileno(config_file), &st);
2125
2569d239
KB
2126 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
2127 ret = error("chmod on %s failed: %s",
daa22c6f
EW
2128 lock->filename, strerror(errno));
2129 goto out;
2130 }
2131
0667fcfb
JS
2132 while (fgets(buf, sizeof(buf), config_file)) {
2133 int i;
480c9e52 2134 int length;
9a5abfc7 2135 char *output = buf;
0667fcfb
JS
2136 for (i = 0; buf[i] && isspace(buf[i]); i++)
2137 ; /* do nothing */
2138 if (buf[i] == '[') {
2139 /* it's a section */
a4c0d463
AV
2140 int offset = section_name_match(&buf[i], old_name);
2141 if (offset > 0) {
118f8b24
PB
2142 ret++;
2143 if (new_name == NULL) {
2144 remove = 1;
0667fcfb
JS
2145 continue;
2146 }
0667fcfb 2147 store.baselen = strlen(new_name);
480c9e52 2148 if (!store_write_section(out_fd, new_name)) {
64c0d71c 2149 ret = write_error(lock->filename);
480c9e52
AW
2150 goto out;
2151 }
9a5abfc7
AV
2152 /*
2153 * We wrote out the new section, with
2154 * a newline, now skip the old
2155 * section's length
2156 */
2157 output += offset + i;
2158 if (strlen(output) > 0) {
2159 /*
2160 * More content means there's
2161 * a declaration to put on the
2162 * next line; indent with a
2163 * tab
2164 */
2165 output -= 1;
2166 output[0] = '\t';
2167 }
0667fcfb 2168 }
118f8b24 2169 remove = 0;
0667fcfb 2170 }
118f8b24
PB
2171 if (remove)
2172 continue;
9a5abfc7
AV
2173 length = strlen(output);
2174 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 2175 ret = write_error(lock->filename);
480c9e52
AW
2176 goto out;
2177 }
0667fcfb 2178 }
fc1905bb 2179 fclose(config_file);
8b590075 2180unlock_and_out:
4ed7cd3a 2181 if (commit_lock_file(lock) < 0)
64c0d71c 2182 ret = error("could not commit config file %s", config_filename);
8b590075 2183out:
42bd39b5 2184 free(filename_buf);
0667fcfb
JS
2185 return ret;
2186}
40ea4ed9 2187
42bd39b5
JK
2188int git_config_rename_section(const char *old_name, const char *new_name)
2189{
4a7bb5ba 2190 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
2191}
2192
40ea4ed9
JH
2193/*
2194 * Call this to report error for your variable that should not
2195 * get a boolean value (i.e. "[my] var" means "true").
2196 */
a469a101 2197#undef config_error_nonbool
40ea4ed9
JH
2198int config_error_nonbool(const char *var)
2199{
2200 return error("Missing value for '%s'", var);
2201}
1b86bbb0
JK
2202
2203int parse_config_key(const char *var,
2204 const char *section,
2205 const char **subsection, int *subsection_len,
2206 const char **key)
2207{
2208 int section_len = strlen(section);
2209 const char *dot;
2210
2211 /* Does it start with "section." ? */
59556548 2212 if (!starts_with(var, section) || var[section_len] != '.')
1b86bbb0
JK
2213 return -1;
2214
2215 /*
2216 * Find the key; we don't know yet if we have a subsection, but we must
2217 * parse backwards from the end, since the subsection may have dots in
2218 * it, too.
2219 */
2220 dot = strrchr(var, '.');
2221 *key = dot + 1;
2222
2223 /* Did we have a subsection at all? */
2224 if (dot == var + section_len) {
2225 *subsection = NULL;
2226 *subsection_len = 0;
2227 }
2228 else {
2229 *subsection = var + section_len + 1;
2230 *subsection_len = dot - *subsection;
2231 }
2232
2233 return 0;
2234}