config.c: fix accuracy of line number in errors
[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
c9b5e2a5
JK
1235int git_config(config_fn_t fn, void *data)
1236{
c8985ce0 1237 return git_config_with_options(fn, data, NULL, 1);
c9b5e2a5
JK
1238}
1239
3c8687a7
TA
1240static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1241{
1242 struct config_set_element k;
1243 struct config_set_element *found_entry;
1244 char *normalized_key;
1245 int ret;
1246 /*
1247 * `key` may come from the user, so normalize it before using it
1248 * for querying entries from the hashmap.
1249 */
1250 ret = git_config_parse_key(key, &normalized_key, NULL);
1251
1252 if (ret)
1253 return NULL;
1254
1255 hashmap_entry_init(&k, strhash(normalized_key));
1256 k.key = normalized_key;
1257 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1258 free(normalized_key);
1259 return found_entry;
1260}
1261
1262static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1263{
1264 struct config_set_element *e;
1265 e = configset_find_element(cs, key);
1266 /*
1267 * Since the keys are being fed by git_config*() callback mechanism, they
1268 * are already normalized. So simply add them without any further munging.
1269 */
1270 if (!e) {
1271 e = xmalloc(sizeof(*e));
1272 hashmap_entry_init(e, strhash(key));
1273 e->key = xstrdup(key);
1274 string_list_init(&e->value_list, 1);
1275 hashmap_add(&cs->config_hash, e);
1276 }
1277 string_list_append_nodup(&e->value_list, value ? xstrdup(value) : NULL);
1278
1279 return 0;
1280}
1281
1282static int config_set_element_cmp(const struct config_set_element *e1,
1283 const struct config_set_element *e2, const void *unused)
1284{
1285 return strcmp(e1->key, e2->key);
1286}
1287
1288void git_configset_init(struct config_set *cs)
1289{
1290 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1291 cs->hash_initialized = 1;
1292}
1293
1294void git_configset_clear(struct config_set *cs)
1295{
1296 struct config_set_element *entry;
1297 struct hashmap_iter iter;
1298 if (!cs->hash_initialized)
1299 return;
1300
1301 hashmap_iter_init(&cs->config_hash, &iter);
1302 while ((entry = hashmap_iter_next(&iter))) {
1303 free(entry->key);
1304 string_list_clear(&entry->value_list, 0);
1305 }
1306 hashmap_free(&cs->config_hash, 1);
1307 cs->hash_initialized = 0;
1308}
1309
1310static int config_set_callback(const char *key, const char *value, void *cb)
1311{
1312 struct config_set *cs = cb;
1313 configset_add_value(cs, key, value);
1314 return 0;
1315}
1316
1317int git_configset_add_file(struct config_set *cs, const char *filename)
1318{
1319 return git_config_from_file(config_set_callback, filename, cs);
1320}
1321
1322int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1323{
1324 const struct string_list *values = NULL;
1325 /*
1326 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1327 * queried key in the files of the configset, the value returned will be the last
1328 * value in the value list for that key.
1329 */
1330 values = git_configset_get_value_multi(cs, key);
1331
1332 if (!values)
1333 return 1;
1334 assert(values->nr > 0);
1335 *value = values->items[values->nr - 1].string;
1336 return 0;
1337}
1338
1339const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1340{
1341 struct config_set_element *e = configset_find_element(cs, key);
1342 return e ? &e->value_list : NULL;
1343}
1344
1345int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1346{
1347 const char *value;
1348 if (!git_configset_get_value(cs, key, &value))
1349 return git_config_string(dest, key, value);
1350 else
1351 return 1;
1352}
1353
1354int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1355{
1356 return git_configset_get_string_const(cs, key, (const char **)dest);
1357}
1358
1359int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1360{
1361 const char *value;
1362 if (!git_configset_get_value(cs, key, &value)) {
1363 *dest = git_config_int(key, value);
1364 return 0;
1365 } else
1366 return 1;
1367}
1368
1369int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1370{
1371 const char *value;
1372 if (!git_configset_get_value(cs, key, &value)) {
1373 *dest = git_config_ulong(key, value);
1374 return 0;
1375 } else
1376 return 1;
1377}
1378
1379int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1380{
1381 const char *value;
1382 if (!git_configset_get_value(cs, key, &value)) {
1383 *dest = git_config_bool(key, value);
1384 return 0;
1385 } else
1386 return 1;
1387}
1388
1389int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1390 int *is_bool, int *dest)
1391{
1392 const char *value;
1393 if (!git_configset_get_value(cs, key, &value)) {
1394 *dest = git_config_bool_or_int(key, value, is_bool);
1395 return 0;
1396 } else
1397 return 1;
1398}
1399
1400int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1401{
1402 const char *value;
1403 if (!git_configset_get_value(cs, key, &value)) {
1404 *dest = git_config_maybe_bool(key, value);
1405 if (*dest == -1)
1406 return -1;
1407 return 0;
1408 } else
1409 return 1;
1410}
1411
1412int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1413{
1414 const char *value;
1415 if (!git_configset_get_value(cs, key, &value))
1416 return git_config_pathname(dest, key, value);
1417 else
1418 return 1;
1419}
1420
1421static void git_config_check_init(void)
1422{
1423 if (the_config_set.hash_initialized)
1424 return;
1425 git_configset_init(&the_config_set);
1426 git_config(config_set_callback, &the_config_set);
1427}
1428
1429void git_config_clear(void)
1430{
1431 if (!the_config_set.hash_initialized)
1432 return;
1433 git_configset_clear(&the_config_set);
1434}
1435
1436int git_config_get_value(const char *key, const char **value)
1437{
1438 git_config_check_init();
1439 return git_configset_get_value(&the_config_set, key, value);
1440}
1441
1442const struct string_list *git_config_get_value_multi(const char *key)
1443{
1444 git_config_check_init();
1445 return git_configset_get_value_multi(&the_config_set, key);
1446}
1447
1448int git_config_get_string_const(const char *key, const char **dest)
1449{
1450 git_config_check_init();
1451 return git_configset_get_string_const(&the_config_set, key, dest);
1452}
1453
1454int git_config_get_string(const char *key, char **dest)
1455{
1456 git_config_check_init();
1457 return git_config_get_string_const(key, (const char **)dest);
1458}
1459
1460int git_config_get_int(const char *key, int *dest)
1461{
1462 git_config_check_init();
1463 return git_configset_get_int(&the_config_set, key, dest);
1464}
1465
1466int git_config_get_ulong(const char *key, unsigned long *dest)
1467{
1468 git_config_check_init();
1469 return git_configset_get_ulong(&the_config_set, key, dest);
1470}
1471
1472int git_config_get_bool(const char *key, int *dest)
1473{
1474 git_config_check_init();
1475 return git_configset_get_bool(&the_config_set, key, dest);
1476}
1477
1478int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1479{
1480 git_config_check_init();
1481 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1482}
1483
1484int git_config_get_maybe_bool(const char *key, int *dest)
1485{
1486 git_config_check_init();
1487 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1488}
1489
1490int git_config_get_pathname(const char *key, const char **dest)
1491{
1492 git_config_check_init();
1493 return git_configset_get_pathname(&the_config_set, key, dest);
1494}
1495
10bea152
JS
1496/*
1497 * Find all the stuff for git_config_set() below.
1498 */
4ddba79d 1499
10bea152
JS
1500static struct {
1501 int baselen;
4b25d091 1502 char *key;
f98d863d 1503 int do_not_match;
4b25d091 1504 regex_t *value_regex;
4ddba79d 1505 int multi_replace;
83786fa4
TR
1506 size_t *offset;
1507 unsigned int offset_alloc;
10bea152
JS
1508 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1509 int seen;
1510} store;
1511
4b25d091 1512static int matches(const char *key, const char *value)
f98d863d
JS
1513{
1514 return !strcmp(key, store.key) &&
1515 (store.value_regex == NULL ||
1516 (store.do_not_match ^
1517 !regexec(store.value_regex, value, 0, NULL, 0)));
1518}
1519
4b25d091 1520static int store_aux(const char *key, const char *value, void *cb)
10bea152 1521{
ae9ee41d
JH
1522 const char *ep;
1523 size_t section_len;
1524
10bea152
JS
1525 switch (store.state) {
1526 case KEY_SEEN:
f98d863d 1527 if (matches(key, value)) {
4ddba79d 1528 if (store.seen == 1 && store.multi_replace == 0) {
8262aaa2 1529 warning(_("%s has multiple values"), key);
10bea152 1530 }
4ddba79d 1531
83786fa4
TR
1532 ALLOC_GROW(store.offset, store.seen + 1,
1533 store.offset_alloc);
1534
49d6cfa5 1535 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1536 store.seen++;
1537 }
1538 break;
1539 case SECTION_SEEN:
ae9ee41d
JH
1540 /*
1541 * What we are looking for is in store.key (both
1542 * section and var), and its section part is baselen
1543 * long. We found key (again, both section and var).
1544 * We would want to know if this key is in the same
1545 * section as what we are looking for. We already
1546 * know we are in the same section as what should
1547 * hold store.key.
1548 */
1549 ep = strrchr(key, '.');
1550 section_len = ep - key;
1551
1552 if ((section_len != store.baselen) ||
1553 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1554 store.state = SECTION_END_SEEN;
1555 break;
ae9ee41d
JH
1556 }
1557
1558 /*
1559 * Do not increment matches: this is no match, but we
1560 * just made sure we are in the desired section.
1561 */
83786fa4
TR
1562 ALLOC_GROW(store.offset, store.seen + 1,
1563 store.offset_alloc);
49d6cfa5 1564 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1565 /* fallthru */
1566 case SECTION_END_SEEN:
1567 case START:
f98d863d 1568 if (matches(key, value)) {
83786fa4
TR
1569 ALLOC_GROW(store.offset, store.seen + 1,
1570 store.offset_alloc);
49d6cfa5 1571 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1572 store.state = KEY_SEEN;
1573 store.seen++;
d14f7764
LT
1574 } else {
1575 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1576 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1577 store.state = SECTION_SEEN;
83786fa4
TR
1578 ALLOC_GROW(store.offset,
1579 store.seen + 1,
1580 store.offset_alloc);
49d6cfa5 1581 store.offset[store.seen] = cf->do_ftell(cf);
d14f7764 1582 }
bdf0ef08 1583 }
10bea152
JS
1584 }
1585 return 0;
1586}
1587
64c0d71c 1588static int write_error(const char *filename)
480c9e52 1589{
64c0d71c 1590 error("failed to write new configuration file %s", filename);
480c9e52
AW
1591
1592 /* Same error code as "failed to rename". */
1593 return 4;
1594}
1595
4b25d091 1596static int store_write_section(int fd, const char *key)
10bea152 1597{
cb891a59
KH
1598 const char *dot;
1599 int i, success;
f285a2d7 1600 struct strbuf sb = STRBUF_INIT;
d14f7764 1601
cb891a59 1602 dot = memchr(key, '.', store.baselen);
d14f7764 1603 if (dot) {
cb891a59
KH
1604 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1605 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1606 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1607 strbuf_addch(&sb, '\\');
1608 strbuf_addch(&sb, key[i]);
d14f7764 1609 }
cb891a59
KH
1610 strbuf_addstr(&sb, "\"]\n");
1611 } else {
1612 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1613 }
1614
cb891a59
KH
1615 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1616 strbuf_release(&sb);
480c9e52 1617
cb891a59 1618 return success;
10bea152
JS
1619}
1620
4b25d091 1621static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1622{
cb891a59
KH
1623 int i, success;
1624 int length = strlen(key + store.baselen + 1);
1625 const char *quote = "";
f285a2d7 1626 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1627
6281f394
JM
1628 /*
1629 * Check to see if the value needs to be surrounded with a dq pair.
1630 * Note that problematic characters are always backslash-quoted; this
1631 * check is about not losing leading or trailing SP and strings that
1632 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1633 * configuration parser.
1634 */
cdd4fb15 1635 if (value[0] == ' ')
cb891a59 1636 quote = "\"";
cdd4fb15
BG
1637 for (i = 0; value[i]; i++)
1638 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1639 quote = "\"";
1640 if (i && value[i - 1] == ' ')
1641 quote = "\"";
1642
cb891a59
KH
1643 strbuf_addf(&sb, "\t%.*s = %s",
1644 length, key + store.baselen + 1, quote);
10bea152 1645
10bea152
JS
1646 for (i = 0; value[i]; i++)
1647 switch (value[i]) {
480c9e52 1648 case '\n':
cb891a59 1649 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1650 break;
1651 case '\t':
cb891a59 1652 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1653 break;
1654 case '"':
1655 case '\\':
cb891a59 1656 strbuf_addch(&sb, '\\');
480c9e52 1657 default:
cb891a59 1658 strbuf_addch(&sb, value[i]);
480c9e52
AW
1659 break;
1660 }
cb891a59
KH
1661 strbuf_addf(&sb, "%s\n", quote);
1662
1663 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1664 strbuf_release(&sb);
1665
1666 return success;
10bea152
JS
1667}
1668
4b25d091
FC
1669static ssize_t find_beginning_of_line(const char *contents, size_t size,
1670 size_t offset_, int *found_bracket)
4ddba79d 1671{
dc49cd76
SP
1672 size_t equal_offset = size, bracket_offset = size;
1673 ssize_t offset;
4ddba79d 1674
7a31cc0f 1675contline:
a6080a0a 1676 for (offset = offset_-2; offset > 0
4ddba79d
JS
1677 && contents[offset] != '\n'; offset--)
1678 switch (contents[offset]) {
1679 case '=': equal_offset = offset; break;
1680 case ']': bracket_offset = offset; break;
1681 }
7a31cc0f
FL
1682 if (offset > 0 && contents[offset-1] == '\\') {
1683 offset_ = offset;
1684 goto contline;
1685 }
4ddba79d
JS
1686 if (bracket_offset < equal_offset) {
1687 *found_bracket = 1;
1688 offset = bracket_offset+1;
1689 } else
1690 offset++;
1691
1692 return offset;
1693}
1694
5ec31182
RR
1695int git_config_set_in_file(const char *config_filename,
1696 const char *key, const char *value)
1697{
1698 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1699}
1700
4b25d091 1701int git_config_set(const char *key, const char *value)
10bea152 1702{
4ddba79d 1703 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1704}
1705
b09c53a3
LP
1706/*
1707 * Auxiliary function to sanity-check and split the key into the section
1708 * identifier and variable name.
1709 *
1710 * Returns 0 on success, -1 when there is an invalid character in the key and
1711 * -2 if there is no section name in the key.
1712 *
1713 * store_key - pointer to char* which will hold a copy of the key with
1714 * lowercase section and variable name
1715 * baselen - pointer to int which will hold the length of the
1716 * section + subsection part, can be NULL
1717 */
1718int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1719{
1720 int i, dot, baselen;
1721 const char *last_dot = strrchr(key, '.');
1722
1723 /*
1724 * Since "key" actually contains the section name and the real
1725 * key name separated by a dot, we have to know where the dot is.
1726 */
1727
2169ddc0 1728 if (last_dot == NULL || last_dot == key) {
b09c53a3 1729 error("key does not contain a section: %s", key);
7a397419 1730 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1731 }
1732
2169ddc0
LP
1733 if (!last_dot[1]) {
1734 error("key does not contain variable name: %s", key);
7a397419 1735 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1736 }
1737
b09c53a3
LP
1738 baselen = last_dot - key;
1739 if (baselen_)
1740 *baselen_ = baselen;
1741
1742 /*
1743 * Validate the key and while at it, lower case it for matching.
1744 */
1745 *store_key = xmalloc(strlen(key) + 1);
1746
1747 dot = 0;
1748 for (i = 0; key[i]; i++) {
1749 unsigned char c = key[i];
1750 if (c == '.')
1751 dot = 1;
1752 /* Leave the extended basename untouched.. */
1753 if (!dot || i > baselen) {
1754 if (!iskeychar(c) ||
1755 (i == baselen + 1 && !isalpha(c))) {
1756 error("invalid key: %s", key);
1757 goto out_free_ret_1;
1758 }
1759 c = tolower(c);
1760 } else if (c == '\n') {
1761 error("invalid key (newline): %s", key);
1762 goto out_free_ret_1;
1763 }
1764 (*store_key)[i] = c;
1765 }
1766 (*store_key)[i] = 0;
1767
1768 return 0;
1769
1770out_free_ret_1:
1771 free(*store_key);
97ed50f9 1772 *store_key = NULL;
7a397419 1773 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1774}
1775
10bea152
JS
1776/*
1777 * If value==NULL, unset in (remove from) config,
1778 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
1779 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1780 * else all matching key/values (regardless how many) are removed,
1781 * before the new pair is written.
10bea152
JS
1782 *
1783 * Returns 0 on success.
1784 *
1785 * This function does this:
1786 *
1787 * - it locks the config file by creating ".git/config.lock"
1788 *
1789 * - it then parses the config using store_aux() as validator to find
1790 * the position on the key/value pair to replace. If it is to be unset,
1791 * it must be found exactly once.
1792 *
1793 * - the config file is mmap()ed and the part before the match (if any) is
1794 * written to the lock file, then the changed part and the rest.
1795 *
1796 * - the config file is removed and the lock file rename()d to it.
1797 *
1798 */
5ec31182
RR
1799int git_config_set_multivar_in_file(const char *config_filename,
1800 const char *key, const char *value,
1801 const char *value_regex, int multi_replace)
10bea152 1802{
f8ba655e 1803 int fd = -1, in_fd;
dafc88b1 1804 int ret;
6cbf973c 1805 struct lock_file *lock = NULL;
0a5f5759 1806 char *filename_buf = NULL;
4ddba79d 1807
b09c53a3
LP
1808 /* parse-key returns negative; flip the sign to feed exit(3) */
1809 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1810 if (ret)
dafc88b1 1811 goto out_free;
b17e659d
JS
1812
1813 store.multi_replace = multi_replace;
10bea152 1814
0a5f5759
JK
1815 if (!config_filename)
1816 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1817
1818 /*
6cbf973c 1819 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1820 * contents of .git/config will be written into it.
1821 */
f1064f6b 1822 lock = xcalloc(1, sizeof(struct lock_file));
6cbf973c
BS
1823 fd = hold_lock_file_for_update(lock, config_filename, 0);
1824 if (fd < 0) {
6ffd567b 1825 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1826 free(store.key);
7a397419 1827 ret = CONFIG_NO_LOCK;
dafc88b1 1828 goto out_free;
10bea152
JS
1829 }
1830
1831 /*
1832 * If .git/config does not exist yet, write a minimal version.
1833 */
88fb958b
AR
1834 in_fd = open(config_filename, O_RDONLY);
1835 if ( in_fd < 0 ) {
10bea152
JS
1836 free(store.key);
1837
88fb958b
AR
1838 if ( ENOENT != errno ) {
1839 error("opening %s: %s", config_filename,
1840 strerror(errno));
7a397419 1841 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1842 goto out_free;
88fb958b 1843 }
10bea152
JS
1844 /* if nothing to unset, error out */
1845 if (value == NULL) {
7a397419 1846 ret = CONFIG_NOTHING_SET;
dafc88b1 1847 goto out_free;
10bea152
JS
1848 }
1849
4b25d091 1850 store.key = (char *)key;
480c9e52 1851 if (!store_write_section(fd, key) ||
93c1e079
JH
1852 !store_write_pair(fd, key, value))
1853 goto write_err_out;
1854 } else {
88fb958b 1855 struct stat st;
4b25d091 1856 char *contents;
dc49cd76
SP
1857 size_t contents_sz, copy_begin, copy_end;
1858 int i, new_line = 0;
10bea152
JS
1859
1860 if (value_regex == NULL)
1861 store.value_regex = NULL;
1862 else {
f98d863d
JS
1863 if (value_regex[0] == '!') {
1864 store.do_not_match = 1;
1865 value_regex++;
1866 } else
1867 store.do_not_match = 0;
1868
2d7320d0 1869 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
1870 if (regcomp(store.value_regex, value_regex,
1871 REG_EXTENDED)) {
64c0d71c 1872 error("invalid pattern: %s", value_regex);
10bea152 1873 free(store.value_regex);
7a397419 1874 ret = CONFIG_INVALID_PATTERN;
dafc88b1 1875 goto out_free;
10bea152
JS
1876 }
1877 }
1878
83786fa4 1879 ALLOC_GROW(store.offset, 1, store.offset_alloc);
4ddba79d 1880 store.offset[0] = 0;
10bea152
JS
1881 store.state = START;
1882 store.seen = 0;
1883
1884 /*
1885 * After this, store.offset will contain the *end* offset
1886 * of the last match, or remain at 0 if no match was found.
1887 * As a side effect, we make sure to transform only a valid
1888 * existing config file.
1889 */
ef90d6d4 1890 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 1891 error("invalid config file %s", config_filename);
10bea152
JS
1892 free(store.key);
1893 if (store.value_regex != NULL) {
1894 regfree(store.value_regex);
1895 free(store.value_regex);
1896 }
7a397419 1897 ret = CONFIG_INVALID_FILE;
dafc88b1 1898 goto out_free;
10bea152
JS
1899 }
1900
1901 free(store.key);
1902 if (store.value_regex != NULL) {
1903 regfree(store.value_regex);
1904 free(store.value_regex);
1905 }
1906
4ddba79d
JS
1907 /* if nothing to unset, or too many matches, error out */
1908 if ((store.seen == 0 && value == NULL) ||
1909 (store.seen > 1 && multi_replace == 0)) {
7a397419 1910 ret = CONFIG_NOTHING_SET;
dafc88b1 1911 goto out_free;
10bea152
JS
1912 }
1913
88fb958b 1914 fstat(in_fd, &st);
dc49cd76
SP
1915 contents_sz = xsize_t(st.st_size);
1916 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1917 MAP_PRIVATE, in_fd, 0);
1918 close(in_fd);
1919
2569d239
KB
1920 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
1921 error("chmod on %s failed: %s",
daa22c6f
EW
1922 lock->filename, strerror(errno));
1923 ret = CONFIG_NO_WRITE;
1924 goto out_free;
1925 }
1926
4ddba79d
JS
1927 if (store.seen == 0)
1928 store.seen = 1;
1929
1930 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1931 if (store.offset[i] == 0) {
dc49cd76 1932 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1933 } else if (store.state != KEY_SEEN) {
1934 copy_end = store.offset[i];
10bea152 1935 } else
4ddba79d 1936 copy_end = find_beginning_of_line(
dc49cd76 1937 contents, contents_sz,
4ddba79d
JS
1938 store.offset[i]-2, &new_line);
1939
02e5ba4a
JK
1940 if (copy_end > 0 && contents[copy_end-1] != '\n')
1941 new_line = 1;
1942
4ddba79d
JS
1943 /* write the first part of the config */
1944 if (copy_end > copy_begin) {
93c1e079
JH
1945 if (write_in_full(fd, contents + copy_begin,
1946 copy_end - copy_begin) <
1947 copy_end - copy_begin)
1948 goto write_err_out;
1949 if (new_line &&
2b7ca830 1950 write_str_in_full(fd, "\n") != 1)
93c1e079 1951 goto write_err_out;
4ddba79d
JS
1952 }
1953 copy_begin = store.offset[i];
10bea152
JS
1954 }
1955
10bea152
JS
1956 /* write the pair (value == NULL means unset) */
1957 if (value != NULL) {
93c1e079
JH
1958 if (store.state == START) {
1959 if (!store_write_section(fd, key))
1960 goto write_err_out;
480c9e52 1961 }
93c1e079
JH
1962 if (!store_write_pair(fd, key, value))
1963 goto write_err_out;
10bea152
JS
1964 }
1965
1966 /* write the rest of the config */
dc49cd76 1967 if (copy_begin < contents_sz)
93c1e079 1968 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1969 contents_sz - copy_begin) <
1970 contents_sz - copy_begin)
93c1e079 1971 goto write_err_out;
10bea152 1972
dc49cd76 1973 munmap(contents, contents_sz);
10bea152
JS
1974 }
1975
4ed7cd3a 1976 if (commit_lock_file(lock) < 0) {
64c0d71c 1977 error("could not commit config file %s", config_filename);
7a397419 1978 ret = CONFIG_NO_WRITE;
dafc88b1 1979 goto out_free;
10bea152
JS
1980 }
1981
6cbf973c
BS
1982 /*
1983 * lock is committed, so don't try to roll it back below.
1984 * NOTE: Since lockfile.c keeps a linked list of all created
1985 * lock_file structures, it isn't safe to free(lock). It's
1986 * better to just leave it hanging around.
1987 */
1988 lock = NULL;
dafc88b1
SH
1989 ret = 0;
1990
3c8687a7
TA
1991 /* Invalidate the config cache */
1992 git_config_clear();
1993
dafc88b1 1994out_free:
6cbf973c
BS
1995 if (lock)
1996 rollback_lock_file(lock);
0a5f5759 1997 free(filename_buf);
dafc88b1 1998 return ret;
93c1e079
JH
1999
2000write_err_out:
64c0d71c 2001 ret = write_error(lock->filename);
93c1e079
JH
2002 goto out_free;
2003
10bea152
JS
2004}
2005
5ec31182
RR
2006int git_config_set_multivar(const char *key, const char *value,
2007 const char *value_regex, int multi_replace)
2008{
4a7bb5ba 2009 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 2010 multi_replace);
5ec31182
RR
2011}
2012
118f8b24
PB
2013static int section_name_match (const char *buf, const char *name)
2014{
2015 int i = 0, j = 0, dot = 0;
a4c0d463
AV
2016 if (buf[i] != '[')
2017 return 0;
2018 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
2019 if (!dot && isspace(buf[i])) {
2020 dot = 1;
2021 if (name[j++] != '.')
2022 break;
2023 for (i++; isspace(buf[i]); i++)
2024 ; /* do nothing */
2025 if (buf[i] != '"')
2026 break;
2027 continue;
2028 }
2029 if (buf[i] == '\\' && dot)
2030 i++;
2031 else if (buf[i] == '"' && dot) {
2032 for (i++; isspace(buf[i]); i++)
2033 ; /* do_nothing */
2034 break;
2035 }
2036 if (buf[i] != name[j++])
2037 break;
2038 }
a4c0d463
AV
2039 if (buf[i] == ']' && name[j] == 0) {
2040 /*
2041 * We match, now just find the right length offset by
2042 * gobbling up any whitespace after it, as well
2043 */
2044 i++;
2045 for (; buf[i] && isspace(buf[i]); i++)
2046 ; /* do nothing */
2047 return i;
2048 }
2049 return 0;
118f8b24
PB
2050}
2051
94a35b1a
JK
2052static int section_name_is_ok(const char *name)
2053{
2054 /* Empty section names are bogus. */
2055 if (!*name)
2056 return 0;
2057
2058 /*
2059 * Before a dot, we must be alphanumeric or dash. After the first dot,
2060 * anything goes, so we can stop checking.
2061 */
2062 for (; *name && *name != '.'; name++)
2063 if (*name != '-' && !isalnum(*name))
2064 return 0;
2065 return 1;
2066}
2067
118f8b24 2068/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
2069int git_config_rename_section_in_file(const char *config_filename,
2070 const char *old_name, const char *new_name)
0667fcfb 2071{
118f8b24 2072 int ret = 0, remove = 0;
42bd39b5 2073 char *filename_buf = NULL;
94a35b1a 2074 struct lock_file *lock;
0667fcfb
JS
2075 int out_fd;
2076 char buf[1024];
924aaf3e 2077 FILE *config_file;
daa22c6f 2078 struct stat st;
0667fcfb 2079
94a35b1a
JK
2080 if (new_name && !section_name_is_ok(new_name)) {
2081 ret = error("invalid section name: %s", new_name);
2082 goto out;
2083 }
2084
42bd39b5
JK
2085 if (!config_filename)
2086 config_filename = filename_buf = git_pathdup("config");
2087
f1064f6b 2088 lock = xcalloc(1, sizeof(struct lock_file));
0667fcfb 2089 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 2090 if (out_fd < 0) {
64c0d71c 2091 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
2092 goto out;
2093 }
0667fcfb 2094
fc1905bb 2095 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
2096 /* no config file means nothing to rename, no error */
2097 goto unlock_and_out;
fc1905bb 2098 }
0667fcfb 2099
daa22c6f
EW
2100 fstat(fileno(config_file), &st);
2101
2569d239
KB
2102 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
2103 ret = error("chmod on %s failed: %s",
daa22c6f
EW
2104 lock->filename, strerror(errno));
2105 goto out;
2106 }
2107
0667fcfb
JS
2108 while (fgets(buf, sizeof(buf), config_file)) {
2109 int i;
480c9e52 2110 int length;
9a5abfc7 2111 char *output = buf;
0667fcfb
JS
2112 for (i = 0; buf[i] && isspace(buf[i]); i++)
2113 ; /* do nothing */
2114 if (buf[i] == '[') {
2115 /* it's a section */
a4c0d463
AV
2116 int offset = section_name_match(&buf[i], old_name);
2117 if (offset > 0) {
118f8b24
PB
2118 ret++;
2119 if (new_name == NULL) {
2120 remove = 1;
0667fcfb
JS
2121 continue;
2122 }
0667fcfb 2123 store.baselen = strlen(new_name);
480c9e52 2124 if (!store_write_section(out_fd, new_name)) {
64c0d71c 2125 ret = write_error(lock->filename);
480c9e52
AW
2126 goto out;
2127 }
9a5abfc7
AV
2128 /*
2129 * We wrote out the new section, with
2130 * a newline, now skip the old
2131 * section's length
2132 */
2133 output += offset + i;
2134 if (strlen(output) > 0) {
2135 /*
2136 * More content means there's
2137 * a declaration to put on the
2138 * next line; indent with a
2139 * tab
2140 */
2141 output -= 1;
2142 output[0] = '\t';
2143 }
0667fcfb 2144 }
118f8b24 2145 remove = 0;
0667fcfb 2146 }
118f8b24
PB
2147 if (remove)
2148 continue;
9a5abfc7
AV
2149 length = strlen(output);
2150 if (write_in_full(out_fd, output, length) != length) {
64c0d71c 2151 ret = write_error(lock->filename);
480c9e52
AW
2152 goto out;
2153 }
0667fcfb 2154 }
fc1905bb 2155 fclose(config_file);
8b590075 2156unlock_and_out:
4ed7cd3a 2157 if (commit_lock_file(lock) < 0)
64c0d71c 2158 ret = error("could not commit config file %s", config_filename);
8b590075 2159out:
42bd39b5 2160 free(filename_buf);
0667fcfb
JS
2161 return ret;
2162}
40ea4ed9 2163
42bd39b5
JK
2164int git_config_rename_section(const char *old_name, const char *new_name)
2165{
4a7bb5ba 2166 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
2167}
2168
40ea4ed9
JH
2169/*
2170 * Call this to report error for your variable that should not
2171 * get a boolean value (i.e. "[my] var" means "true").
2172 */
a469a101 2173#undef config_error_nonbool
40ea4ed9
JH
2174int config_error_nonbool(const char *var)
2175{
2176 return error("Missing value for '%s'", var);
2177}
1b86bbb0
JK
2178
2179int parse_config_key(const char *var,
2180 const char *section,
2181 const char **subsection, int *subsection_len,
2182 const char **key)
2183{
2184 int section_len = strlen(section);
2185 const char *dot;
2186
2187 /* Does it start with "section." ? */
59556548 2188 if (!starts_with(var, section) || var[section_len] != '.')
1b86bbb0
JK
2189 return -1;
2190
2191 /*
2192 * Find the key; we don't know yet if we have a subsection, but we must
2193 * parse backwards from the end, since the subsection may have dots in
2194 * it, too.
2195 */
2196 dot = strrchr(var, '.');
2197 *key = dot + 1;
2198
2199 /* Did we have a subsection at all? */
2200 if (dot == var + section_len) {
2201 *subsection = NULL;
2202 *subsection_len = 0;
2203 }
2204 else {
2205 *subsection = var + section_len + 1;
2206 *subsection_len = dot - *subsection;
2207 }
2208
2209 return 0;
2210}