GIT 1.5.6
[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"
17712991
LT
10
11#define MAXNAME (256)
12
13static FILE *config_file;
0dccc7dc 14static const char *config_file_name;
17712991 15static int config_linenr;
02e5ba4a 16static int config_file_eof;
960ccca6
DH
17static int zlib_compression_seen;
18
17712991
LT
19static int get_next_char(void)
20{
21 int c;
22 FILE *f;
23
24 c = '\n';
25 if ((f = config_file) != NULL) {
26 c = fgetc(f);
db2c075d
JH
27 if (c == '\r') {
28 /* DOS like systems */
29 c = fgetc(f);
30 if (c != '\n') {
31 ungetc(c, f);
32 c = '\r';
33 }
34 }
17712991
LT
35 if (c == '\n')
36 config_linenr++;
37 if (c == EOF) {
02e5ba4a 38 config_file_eof = 1;
17712991
LT
39 c = '\n';
40 }
41 }
42 return c;
43}
44
45static char *parse_value(void)
46{
47 static char value[1024];
48 int quote = 0, comment = 0, len = 0, space = 0;
49
50 for (;;) {
51 int c = get_next_char();
52 if (len >= sizeof(value))
53 return NULL;
54 if (c == '\n') {
55 if (quote)
56 return NULL;
57 value[len] = 0;
58 return value;
59 }
60 if (comment)
61 continue;
62 if (isspace(c) && !quote) {
63 space = 1;
64 continue;
65 }
7ebdba61
JS
66 if (!quote) {
67 if (c == ';' || c == '#') {
68 comment = 1;
69 continue;
70 }
71 }
17712991
LT
72 if (space) {
73 if (len)
74 value[len++] = ' ';
75 space = 0;
76 }
77 if (c == '\\') {
78 c = get_next_char();
79 switch (c) {
80 case '\n':
81 continue;
82 case 't':
83 c = '\t';
84 break;
85 case 'b':
86 c = '\b';
87 break;
88 case 'n':
89 c = '\n';
90 break;
5cbb401d
LT
91 /* Some characters escape as themselves */
92 case '\\': case '"':
93 break;
94 /* Reject unknown escape sequences */
95 default:
96 return NULL;
17712991
LT
97 }
98 value[len++] = c;
99 continue;
100 }
101 if (c == '"') {
102 quote = 1-quote;
103 continue;
104 }
17712991
LT
105 value[len++] = c;
106 }
107}
108
38c5afa8
LT
109static inline int iskeychar(int c)
110{
111 return isalnum(c) || c == '-';
112}
113
ef90d6d4 114static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
115{
116 int c;
117 char *value;
118
119 /* Get the full name */
120 for (;;) {
121 c = get_next_char();
02e5ba4a 122 if (config_file_eof)
17712991 123 break;
38c5afa8 124 if (!iskeychar(c))
17712991
LT
125 break;
126 name[len++] = tolower(c);
127 if (len >= MAXNAME)
128 return -1;
129 }
130 name[len] = 0;
131 while (c == ' ' || c == '\t')
132 c = get_next_char();
133
134 value = NULL;
135 if (c != '\n') {
136 if (c != '=')
137 return -1;
138 value = parse_value();
139 if (!value)
140 return -1;
141 }
ef90d6d4 142 return fn(name, value, data);
17712991
LT
143}
144
d14f7764
LT
145static int get_extended_base_var(char *name, int baselen, int c)
146{
147 do {
148 if (c == '\n')
149 return -1;
150 c = get_next_char();
151 } while (isspace(c));
152
153 /* We require the format to be '[base "extension"]' */
154 if (c != '"')
155 return -1;
156 name[baselen++] = '.';
157
158 for (;;) {
159 int c = get_next_char();
160 if (c == '\n')
161 return -1;
162 if (c == '"')
163 break;
164 if (c == '\\') {
165 c = get_next_char();
166 if (c == '\n')
167 return -1;
168 }
169 name[baselen++] = c;
170 if (baselen > MAXNAME / 2)
171 return -1;
172 }
173
174 /* Final ']' */
175 if (get_next_char() != ']')
176 return -1;
177 return baselen;
178}
179
17712991
LT
180static int get_base_var(char *name)
181{
182 int baselen = 0;
183
184 for (;;) {
185 int c = get_next_char();
02e5ba4a 186 if (config_file_eof)
17712991
LT
187 return -1;
188 if (c == ']')
189 return baselen;
d14f7764
LT
190 if (isspace(c))
191 return get_extended_base_var(name, baselen, c);
38c5afa8 192 if (!iskeychar(c) && c != '.')
17712991
LT
193 return -1;
194 if (baselen > MAXNAME / 2)
195 return -1;
196 name[baselen++] = tolower(c);
197 }
198}
199
ef90d6d4 200static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
201{
202 int comment = 0;
203 int baselen = 0;
204 static char var[MAXNAME];
205
206 for (;;) {
207 int c = get_next_char();
208 if (c == '\n') {
02e5ba4a 209 if (config_file_eof)
17712991
LT
210 return 0;
211 comment = 0;
212 continue;
213 }
214 if (comment || isspace(c))
215 continue;
216 if (c == '#' || c == ';') {
217 comment = 1;
218 continue;
219 }
220 if (c == '[') {
221 baselen = get_base_var(var);
222 if (baselen <= 0)
223 break;
224 var[baselen++] = '.';
225 var[baselen] = 0;
226 continue;
227 }
228 if (!isalpha(c))
229 break;
128af9d1 230 var[baselen] = tolower(c);
ef90d6d4 231 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
232 break;
233 }
4f629539 234 die("bad config file line %d in %s", config_linenr, config_file_name);
17712991
LT
235}
236
c8deb5a1 237static int parse_unit_factor(const char *end, unsigned long *val)
0b87b6e0
BD
238{
239 if (!*end)
240 return 1;
c8deb5a1
SP
241 else if (!strcasecmp(end, "k")) {
242 *val *= 1024;
243 return 1;
244 }
245 else if (!strcasecmp(end, "m")) {
246 *val *= 1024 * 1024;
247 return 1;
248 }
249 else if (!strcasecmp(end, "g")) {
250 *val *= 1024 * 1024 * 1024;
251 return 1;
252 }
253 return 0;
0b87b6e0
BD
254}
255
256int git_parse_long(const char *value, long *ret)
257{
258 if (value && *value) {
259 char *end;
260 long val = strtol(value, &end, 0);
c8deb5a1
SP
261 unsigned long factor = 1;
262 if (!parse_unit_factor(end, &factor))
263 return 0;
264 *ret = val * factor;
0b87b6e0
BD
265 return 1;
266 }
267 return 0;
268}
269
270int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
271{
272 if (value && *value) {
273 char *end;
0b87b6e0 274 unsigned long val = strtoul(value, &end, 0);
c8deb5a1
SP
275 if (!parse_unit_factor(end, &val))
276 return 0;
277 *ret = val;
0b87b6e0 278 return 1;
17712991 279 }
0b87b6e0
BD
280 return 0;
281}
282
c1867cea
JK
283static void die_bad_config(const char *name)
284{
285 if (config_file_name)
286 die("bad config value for '%s' in %s", name, config_file_name);
287 die("bad config value for '%s'", name);
288}
289
0b87b6e0
BD
290int git_config_int(const char *name, const char *value)
291{
292 long ret;
293 if (!git_parse_long(value, &ret))
c1867cea 294 die_bad_config(name);
0b87b6e0
BD
295 return ret;
296}
297
298unsigned long git_config_ulong(const char *name, const char *value)
299{
300 unsigned long ret;
301 if (!git_parse_ulong(value, &ret))
c1867cea 302 die_bad_config(name);
0b87b6e0 303 return ret;
17712991
LT
304}
305
a53f2ec6 306int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
17712991 307{
a53f2ec6 308 *is_bool = 1;
17712991
LT
309 if (!value)
310 return 1;
311 if (!*value)
312 return 0;
624314fd 313 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
17712991 314 return 1;
624314fd 315 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
17712991 316 return 0;
a53f2ec6 317 *is_bool = 0;
c35b0b58 318 return git_config_int(name, value);
17712991
LT
319}
320
a53f2ec6
JH
321int git_config_bool(const char *name, const char *value)
322{
323 int discard;
c35b0b58 324 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
325}
326
ea5105a5
CC
327int git_config_string(const char **dest, const char *var, const char *value)
328{
329 if (!value)
330 return config_error_nonbool(var);
331 *dest = xstrdup(value);
332 return 0;
333}
334
ef90d6d4 335int git_default_config(const char *var, const char *value, void *dummy)
17712991
LT
336{
337 /* This needs a better name */
338 if (!strcmp(var, "core.filemode")) {
339 trust_executable_bit = git_config_bool(var, value);
340 return 0;
341 }
342
9378c161
JH
343 if (!strcmp(var, "core.quotepath")) {
344 quote_path_fully = git_config_bool(var, value);
345 return 0;
346 }
347
78a8d641
JS
348 if (!strcmp(var, "core.symlinks")) {
349 has_symlinks = git_config_bool(var, value);
350 return 0;
351 }
352
0a9b88b7
LT
353 if (!strcmp(var, "core.ignorecase")) {
354 ignore_case = git_config_bool(var, value);
355 return 0;
356 }
357
7d1864ce
JH
358 if (!strcmp(var, "core.bare")) {
359 is_bare_repository_cfg = git_config_bool(var, value);
360 return 0;
361 }
362
5f73076c
JH
363 if (!strcmp(var, "core.ignorestat")) {
364 assume_unchanged = git_config_bool(var, value);
365 return 0;
366 }
367
e388c738
JH
368 if (!strcmp(var, "core.prefersymlinkrefs")) {
369 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
370 return 0;
371 }
372
6de08ae6
SP
373 if (!strcmp(var, "core.logallrefupdates")) {
374 log_all_ref_updates = git_config_bool(var, value);
375 return 0;
376 }
377
2f8acdb3
JH
378 if (!strcmp(var, "core.warnambiguousrefs")) {
379 warn_ambiguous_refs = git_config_bool(var, value);
380 return 0;
381 }
382
960ccca6 383 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
384 int level = git_config_int(var, value);
385 if (level == -1)
386 level = Z_DEFAULT_COMPRESSION;
387 else if (level < 0 || level > Z_BEST_COMPRESSION)
388 die("bad zlib compression level %d", level);
389 zlib_compression_level = level;
960ccca6
DH
390 zlib_compression_seen = 1;
391 return 0;
392 }
393
394 if (!strcmp(var, "core.compression")) {
395 int level = git_config_int(var, value);
396 if (level == -1)
397 level = Z_DEFAULT_COMPRESSION;
398 else if (level < 0 || level > Z_BEST_COMPRESSION)
399 die("bad zlib compression level %d", level);
400 core_compression_level = level;
401 core_compression_seen = 1;
402 if (!zlib_compression_seen)
403 zlib_compression_level = level;
12f6c308
JBH
404 return 0;
405 }
406
60bb8b14 407 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 408 int pgsz_x2 = getpagesize() * 2;
60bb8b14 409 packed_git_window_size = git_config_int(var, value);
5faaf246
JH
410
411 /* This value must be multiple of (pagesize * 2) */
412 packed_git_window_size /= pgsz_x2;
413 if (packed_git_window_size < 1)
414 packed_git_window_size = 1;
415 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
416 return 0;
417 }
418
77ccc5bb
SP
419 if (!strcmp(var, "core.packedgitlimit")) {
420 packed_git_limit = git_config_int(var, value);
421 return 0;
422 }
423
18bdec11
SP
424 if (!strcmp(var, "core.deltabasecachelimit")) {
425 delta_base_cache_limit = git_config_int(var, value);
426 return 0;
427 }
428
6c510bee 429 if (!strcmp(var, "core.autocrlf")) {
d7f46334
LT
430 if (value && !strcasecmp(value, "input")) {
431 auto_crlf = -1;
432 return 0;
433 }
6c510bee
LT
434 auto_crlf = git_config_bool(var, value);
435 return 0;
436 }
437
21e5ad50
SP
438 if (!strcmp(var, "core.safecrlf")) {
439 if (value && !strcasecmp(value, "warn")) {
440 safe_crlf = SAFE_CRLF_WARN;
441 return 0;
442 }
443 safe_crlf = git_config_bool(var, value);
444 return 0;
445 }
446
e1b10391 447 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
448 if (!value)
449 return config_error_nonbool(var);
817151e6 450 strlcpy(git_default_name, value, sizeof(git_default_name));
bb1ae3f6
SB
451 if (git_default_email[0])
452 user_ident_explicitly_given = 1;
e1b10391
LT
453 return 0;
454 }
455
456 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
457 if (!value)
458 return config_error_nonbool(var);
817151e6 459 strlcpy(git_default_email, value, sizeof(git_default_email));
bb1ae3f6
SB
460 if (git_default_name[0])
461 user_ident_explicitly_given = 1;
e1b10391
LT
462 return 0;
463 }
464
ea5105a5
CC
465 if (!strcmp(var, "i18n.commitencoding"))
466 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 467
ea5105a5
CC
468 if (!strcmp(var, "i18n.logoutputencoding"))
469 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 470
a159ca0c 471 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
aa086eb8
ML
472 pager_use_color = git_config_bool(var,value);
473 return 0;
474 }
475
872da32d
CC
476 if (!strcmp(var, "core.pager"))
477 return git_config_string(&pager_program, var, value);
54adf370 478
ee9601e6
CC
479 if (!strcmp(var, "core.editor"))
480 return git_config_string(&editor_program, var, value);
4d87b9c5 481
dfb068be
CC
482 if (!strcmp(var, "core.excludesfile"))
483 return git_config_string(&excludes_file, var, value);
039bc64e 484
a9cc857a 485 if (!strcmp(var, "core.whitespace")) {
6c47d0e8
JH
486 if (!value)
487 return config_error_nonbool(var);
cf1b7869 488 whitespace_rule_cfg = parse_whitespace_rule(value);
a9cc857a
JH
489 return 0;
490 }
9ed36cfa
JS
491 if (!strcmp(var, "branch.autosetupmerge")) {
492 if (value && !strcasecmp(value, "always")) {
493 git_branch_track = BRANCH_TRACK_ALWAYS;
494 return 0;
495 }
496 git_branch_track = git_config_bool(var, value);
497 return 0;
498 }
c998ae9b
DS
499 if (!strcmp(var, "branch.autosetuprebase")) {
500 if (!value)
501 return config_error_nonbool(var);
502 else if (!strcmp(value, "never"))
503 autorebase = AUTOREBASE_NEVER;
504 else if (!strcmp(value, "local"))
505 autorebase = AUTOREBASE_LOCAL;
506 else if (!strcmp(value, "remote"))
507 autorebase = AUTOREBASE_REMOTE;
508 else if (!strcmp(value, "always"))
509 autorebase = AUTOREBASE_ALWAYS;
510 else
511 return error("Malformed value for %s", var);
512 return 0;
513 }
a9cc857a 514
1ab661dd 515 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
516 return 0;
517}
518
ef90d6d4 519int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
520{
521 int ret;
4f629539 522 FILE *f = fopen(filename, "r");
17712991
LT
523
524 ret = -1;
525 if (f) {
526 config_file = f;
4f629539 527 config_file_name = filename;
17712991 528 config_linenr = 1;
02e5ba4a 529 config_file_eof = 0;
ef90d6d4 530 ret = git_parse_file(fn, data);
17712991 531 fclose(f);
4f629539 532 config_file_name = NULL;
17712991
LT
533 }
534 return ret;
535}
10bea152 536
506b17b1
JS
537const char *git_etc_gitconfig(void)
538{
7f0e39fa
JS
539 static const char *system_wide;
540 if (!system_wide) {
541 system_wide = ETC_GITCONFIG;
542 if (!is_absolute_path(system_wide)) {
543 /* interpret path relative to exec-dir */
ef5b9d6e
JS
544 struct strbuf d = STRBUF_INIT;
545 strbuf_addf(&d, "%s/%s", git_exec_path(), system_wide);
546 system_wide = strbuf_detach(&d, NULL);
7f0e39fa
JS
547 }
548 }
549 return system_wide;
506b17b1
JS
550}
551
ab88c363
JK
552int git_env_bool(const char *k, int def)
553{
554 const char *v = getenv(k);
555 return v ? git_config_bool(k, v) : def;
556}
557
558int git_config_system(void)
559{
560 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
561}
562
563int git_config_global(void)
564{
565 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
566}
567
ef90d6d4 568int git_config(config_fn_t fn, void *data)
4f629539 569{
5f1a63e0
JS
570 int ret = 0;
571 char *repo_config = NULL;
572 const char *home = NULL, *filename;
573
574 /* $GIT_CONFIG makes git read _only_ the given config file,
575 * $GIT_CONFIG_LOCAL will make it process it in addition to the
576 * global config file, the same way it would the per-repository
577 * config file otherwise. */
d4ebc36c 578 filename = getenv(CONFIG_ENVIRONMENT);
5f1a63e0 579 if (!filename) {
ab88c363 580 if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
ef90d6d4
JS
581 ret += git_config_from_file(fn, git_etc_gitconfig(),
582 data);
5f1a63e0 583 home = getenv("HOME");
d4ebc36c 584 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
5f1a63e0 585 if (!filename)
9befac47 586 filename = repo_config = xstrdup(git_path("config"));
7f29f7a9 587 }
5f1a63e0 588
ab88c363 589 if (git_config_global() && home) {
9befac47 590 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
e33d0611 591 if (!access(user_config, R_OK))
ef90d6d4 592 ret = git_config_from_file(fn, user_config, data);
5f1a63e0
JS
593 free(user_config);
594 }
595
ef90d6d4 596 ret += git_config_from_file(fn, filename, data);
4cac42b1 597 free(repo_config);
5f1a63e0 598 return ret;
4f629539
JH
599}
600
10bea152
JS
601/*
602 * Find all the stuff for git_config_set() below.
603 */
4ddba79d
JS
604
605#define MAX_MATCHES 512
606
10bea152
JS
607static struct {
608 int baselen;
609 char* key;
f98d863d 610 int do_not_match;
10bea152 611 regex_t* value_regex;
4ddba79d 612 int multi_replace;
dc49cd76 613 size_t offset[MAX_MATCHES];
10bea152
JS
614 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
615 int seen;
616} store;
617
f98d863d
JS
618static int matches(const char* key, const char* value)
619{
620 return !strcmp(key, store.key) &&
621 (store.value_regex == NULL ||
622 (store.do_not_match ^
623 !regexec(store.value_regex, value, 0, NULL, 0)));
624}
625
ef90d6d4 626static int store_aux(const char* key, const char* value, void *cb)
10bea152 627{
ae9ee41d
JH
628 const char *ep;
629 size_t section_len;
630
10bea152
JS
631 switch (store.state) {
632 case KEY_SEEN:
f98d863d 633 if (matches(key, value)) {
4ddba79d 634 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 635 warning("%s has multiple values", key);
4ddba79d 636 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 637 error("too many matches for %s", key);
4ddba79d 638 return 1;
10bea152 639 }
4ddba79d
JS
640
641 store.offset[store.seen] = ftell(config_file);
10bea152
JS
642 store.seen++;
643 }
644 break;
645 case SECTION_SEEN:
ae9ee41d
JH
646 /*
647 * What we are looking for is in store.key (both
648 * section and var), and its section part is baselen
649 * long. We found key (again, both section and var).
650 * We would want to know if this key is in the same
651 * section as what we are looking for. We already
652 * know we are in the same section as what should
653 * hold store.key.
654 */
655 ep = strrchr(key, '.');
656 section_len = ep - key;
657
658 if ((section_len != store.baselen) ||
659 memcmp(key, store.key, section_len+1)) {
10bea152
JS
660 store.state = SECTION_END_SEEN;
661 break;
ae9ee41d
JH
662 }
663
664 /*
665 * Do not increment matches: this is no match, but we
666 * just made sure we are in the desired section.
667 */
668 store.offset[store.seen] = ftell(config_file);
10bea152
JS
669 /* fallthru */
670 case SECTION_END_SEEN:
671 case START:
f98d863d 672 if (matches(key, value)) {
4ddba79d 673 store.offset[store.seen] = ftell(config_file);
10bea152
JS
674 store.state = KEY_SEEN;
675 store.seen++;
d14f7764
LT
676 } else {
677 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 678 !strncmp(key, store.key, store.baselen)) {
93ddef3e 679 store.state = SECTION_SEEN;
bdf0ef08 680 store.offset[store.seen] = ftell(config_file);
d14f7764 681 }
bdf0ef08 682 }
10bea152
JS
683 }
684 return 0;
685}
686
64c0d71c 687static int write_error(const char *filename)
480c9e52 688{
64c0d71c 689 error("failed to write new configuration file %s", filename);
480c9e52
AW
690
691 /* Same error code as "failed to rename". */
692 return 4;
693}
694
695static int store_write_section(int fd, const char* key)
10bea152 696{
cb891a59
KH
697 const char *dot;
698 int i, success;
699 struct strbuf sb;
d14f7764 700
cb891a59
KH
701 strbuf_init(&sb, 0);
702 dot = memchr(key, '.', store.baselen);
d14f7764 703 if (dot) {
cb891a59
KH
704 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
705 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 706 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
707 strbuf_addch(&sb, '\\');
708 strbuf_addch(&sb, key[i]);
d14f7764 709 }
cb891a59
KH
710 strbuf_addstr(&sb, "\"]\n");
711 } else {
712 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
713 }
714
cb891a59
KH
715 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
716 strbuf_release(&sb);
480c9e52 717
cb891a59 718 return success;
10bea152
JS
719}
720
480c9e52 721static int store_write_pair(int fd, const char* key, const char* value)
10bea152 722{
cb891a59
KH
723 int i, success;
724 int length = strlen(key + store.baselen + 1);
725 const char *quote = "";
726 struct strbuf sb;
cdd4fb15 727
6281f394
JM
728 /*
729 * Check to see if the value needs to be surrounded with a dq pair.
730 * Note that problematic characters are always backslash-quoted; this
731 * check is about not losing leading or trailing SP and strings that
732 * follow beginning-of-comment characters (i.e. ';' and '#') by the
733 * configuration parser.
734 */
cdd4fb15 735 if (value[0] == ' ')
cb891a59 736 quote = "\"";
cdd4fb15
BG
737 for (i = 0; value[i]; i++)
738 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
739 quote = "\"";
740 if (i && value[i - 1] == ' ')
741 quote = "\"";
742
743 strbuf_init(&sb, 0);
744 strbuf_addf(&sb, "\t%.*s = %s",
745 length, key + store.baselen + 1, quote);
10bea152 746
10bea152
JS
747 for (i = 0; value[i]; i++)
748 switch (value[i]) {
480c9e52 749 case '\n':
cb891a59 750 strbuf_addstr(&sb, "\\n");
480c9e52
AW
751 break;
752 case '\t':
cb891a59 753 strbuf_addstr(&sb, "\\t");
480c9e52
AW
754 break;
755 case '"':
756 case '\\':
cb891a59 757 strbuf_addch(&sb, '\\');
480c9e52 758 default:
cb891a59 759 strbuf_addch(&sb, value[i]);
480c9e52
AW
760 break;
761 }
cb891a59
KH
762 strbuf_addf(&sb, "%s\n", quote);
763
764 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
765 strbuf_release(&sb);
766
767 return success;
10bea152
JS
768}
769
dc49cd76
SP
770static ssize_t find_beginning_of_line(const char* contents, size_t size,
771 size_t offset_, int* found_bracket)
4ddba79d 772{
dc49cd76
SP
773 size_t equal_offset = size, bracket_offset = size;
774 ssize_t offset;
4ddba79d 775
7a31cc0f 776contline:
a6080a0a 777 for (offset = offset_-2; offset > 0
4ddba79d
JS
778 && contents[offset] != '\n'; offset--)
779 switch (contents[offset]) {
780 case '=': equal_offset = offset; break;
781 case ']': bracket_offset = offset; break;
782 }
7a31cc0f
FL
783 if (offset > 0 && contents[offset-1] == '\\') {
784 offset_ = offset;
785 goto contline;
786 }
4ddba79d
JS
787 if (bracket_offset < equal_offset) {
788 *found_bracket = 1;
789 offset = bracket_offset+1;
790 } else
791 offset++;
792
793 return offset;
794}
795
10bea152
JS
796int git_config_set(const char* key, const char* value)
797{
4ddba79d 798 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
799}
800
801/*
802 * If value==NULL, unset in (remove from) config,
803 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
804 * if multi_replace==0, nothing, or only one matching key/value is replaced,
805 * else all matching key/values (regardless how many) are removed,
806 * before the new pair is written.
10bea152
JS
807 *
808 * Returns 0 on success.
809 *
810 * This function does this:
811 *
812 * - it locks the config file by creating ".git/config.lock"
813 *
814 * - it then parses the config using store_aux() as validator to find
815 * the position on the key/value pair to replace. If it is to be unset,
816 * it must be found exactly once.
817 *
818 * - the config file is mmap()ed and the part before the match (if any) is
819 * written to the lock file, then the changed part and the rest.
820 *
821 * - the config file is removed and the lock file rename()d to it.
822 *
823 */
824int git_config_set_multivar(const char* key, const char* value,
4ddba79d 825 const char* value_regex, int multi_replace)
10bea152 826{
d14f7764 827 int i, dot;
f8ba655e 828 int fd = -1, in_fd;
dafc88b1 829 int ret;
9c3796fc 830 char* config_filename;
6cbf973c 831 struct lock_file *lock = NULL;
b17e659d 832 const char* last_dot = strrchr(key, '.');
4ddba79d 833
d4ebc36c 834 config_filename = getenv(CONFIG_ENVIRONMENT);
9c3796fc 835 if (!config_filename) {
d4ebc36c 836 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
9c3796fc
JS
837 if (!config_filename)
838 config_filename = git_path("config");
839 }
9befac47 840 config_filename = xstrdup(config_filename);
9c3796fc 841
10bea152
JS
842 /*
843 * Since "key" actually contains the section name and the real
844 * key name separated by a dot, we have to know where the dot is.
845 */
b17e659d 846
dafc88b1 847 if (last_dot == NULL) {
64c0d71c 848 error("key does not contain a section: %s", key);
dafc88b1
SH
849 ret = 2;
850 goto out_free;
10bea152 851 }
b17e659d
JS
852 store.baselen = last_dot - key;
853
854 store.multi_replace = multi_replace;
10bea152
JS
855
856 /*
857 * Validate the key and while at it, lower case it for matching.
858 */
2d7320d0 859 store.key = xmalloc(strlen(key) + 1);
d14f7764
LT
860 dot = 0;
861 for (i = 0; key[i]; i++) {
862 unsigned char c = key[i];
863 if (c == '.')
864 dot = 1;
865 /* Leave the extended basename untouched.. */
866 if (!dot || i > store.baselen) {
38c5afa8 867 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
64c0d71c 868 error("invalid key: %s", key);
d14f7764
LT
869 free(store.key);
870 ret = 1;
871 goto out_free;
872 }
873 c = tolower(c);
6f71686e 874 } else if (c == '\n') {
64c0d71c 875 error("invalid key (newline): %s", key);
6f71686e
JS
876 free(store.key);
877 ret = 1;
878 goto out_free;
d14f7764
LT
879 }
880 store.key[i] = c;
881 }
3dd94e3b 882 store.key[i] = 0;
10bea152
JS
883
884 /*
6cbf973c 885 * The lock serves a purpose in addition to locking: the new
10bea152
JS
886 * contents of .git/config will be written into it.
887 */
6cbf973c
BS
888 lock = xcalloc(sizeof(struct lock_file), 1);
889 fd = hold_lock_file_for_update(lock, config_filename, 0);
890 if (fd < 0) {
64c0d71c 891 error("could not lock config file %s", config_filename);
10bea152 892 free(store.key);
dafc88b1
SH
893 ret = -1;
894 goto out_free;
10bea152
JS
895 }
896
897 /*
898 * If .git/config does not exist yet, write a minimal version.
899 */
88fb958b
AR
900 in_fd = open(config_filename, O_RDONLY);
901 if ( in_fd < 0 ) {
10bea152
JS
902 free(store.key);
903
88fb958b
AR
904 if ( ENOENT != errno ) {
905 error("opening %s: %s", config_filename,
906 strerror(errno));
dafc88b1
SH
907 ret = 3; /* same as "invalid config file" */
908 goto out_free;
88fb958b 909 }
10bea152
JS
910 /* if nothing to unset, error out */
911 if (value == NULL) {
dafc88b1
SH
912 ret = 5;
913 goto out_free;
10bea152
JS
914 }
915
916 store.key = (char*)key;
480c9e52 917 if (!store_write_section(fd, key) ||
93c1e079
JH
918 !store_write_pair(fd, key, value))
919 goto write_err_out;
920 } else {
88fb958b 921 struct stat st;
10bea152 922 char* contents;
dc49cd76
SP
923 size_t contents_sz, copy_begin, copy_end;
924 int i, new_line = 0;
10bea152
JS
925
926 if (value_regex == NULL)
927 store.value_regex = NULL;
928 else {
f98d863d
JS
929 if (value_regex[0] == '!') {
930 store.do_not_match = 1;
931 value_regex++;
932 } else
933 store.do_not_match = 0;
934
2d7320d0 935 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
936 if (regcomp(store.value_regex, value_regex,
937 REG_EXTENDED)) {
64c0d71c 938 error("invalid pattern: %s", value_regex);
10bea152 939 free(store.value_regex);
dafc88b1
SH
940 ret = 6;
941 goto out_free;
10bea152
JS
942 }
943 }
944
4ddba79d 945 store.offset[0] = 0;
10bea152
JS
946 store.state = START;
947 store.seen = 0;
948
949 /*
950 * After this, store.offset will contain the *end* offset
951 * of the last match, or remain at 0 if no match was found.
952 * As a side effect, we make sure to transform only a valid
953 * existing config file.
954 */
ef90d6d4 955 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 956 error("invalid config file %s", config_filename);
10bea152
JS
957 free(store.key);
958 if (store.value_regex != NULL) {
959 regfree(store.value_regex);
960 free(store.value_regex);
961 }
dafc88b1
SH
962 ret = 3;
963 goto out_free;
10bea152
JS
964 }
965
966 free(store.key);
967 if (store.value_regex != NULL) {
968 regfree(store.value_regex);
969 free(store.value_regex);
970 }
971
4ddba79d
JS
972 /* if nothing to unset, or too many matches, error out */
973 if ((store.seen == 0 && value == NULL) ||
974 (store.seen > 1 && multi_replace == 0)) {
dafc88b1
SH
975 ret = 5;
976 goto out_free;
10bea152
JS
977 }
978
88fb958b 979 fstat(in_fd, &st);
dc49cd76
SP
980 contents_sz = xsize_t(st.st_size);
981 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
982 MAP_PRIVATE, in_fd, 0);
983 close(in_fd);
984
4ddba79d
JS
985 if (store.seen == 0)
986 store.seen = 1;
987
988 for (i = 0, copy_begin = 0; i < store.seen; i++) {
989 if (store.offset[i] == 0) {
dc49cd76 990 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
991 } else if (store.state != KEY_SEEN) {
992 copy_end = store.offset[i];
10bea152 993 } else
4ddba79d 994 copy_end = find_beginning_of_line(
dc49cd76 995 contents, contents_sz,
4ddba79d
JS
996 store.offset[i]-2, &new_line);
997
02e5ba4a
JK
998 if (copy_end > 0 && contents[copy_end-1] != '\n')
999 new_line = 1;
1000
4ddba79d
JS
1001 /* write the first part of the config */
1002 if (copy_end > copy_begin) {
93c1e079
JH
1003 if (write_in_full(fd, contents + copy_begin,
1004 copy_end - copy_begin) <
1005 copy_end - copy_begin)
1006 goto write_err_out;
1007 if (new_line &&
1008 write_in_full(fd, "\n", 1) != 1)
1009 goto write_err_out;
4ddba79d
JS
1010 }
1011 copy_begin = store.offset[i];
10bea152
JS
1012 }
1013
10bea152
JS
1014 /* write the pair (value == NULL means unset) */
1015 if (value != NULL) {
93c1e079
JH
1016 if (store.state == START) {
1017 if (!store_write_section(fd, key))
1018 goto write_err_out;
480c9e52 1019 }
93c1e079
JH
1020 if (!store_write_pair(fd, key, value))
1021 goto write_err_out;
10bea152
JS
1022 }
1023
1024 /* write the rest of the config */
dc49cd76 1025 if (copy_begin < contents_sz)
93c1e079 1026 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1027 contents_sz - copy_begin) <
1028 contents_sz - copy_begin)
93c1e079 1029 goto write_err_out;
10bea152 1030
dc49cd76 1031 munmap(contents, contents_sz);
10bea152
JS
1032 }
1033
4ed7cd3a 1034 if (commit_lock_file(lock) < 0) {
64c0d71c 1035 error("could not commit config file %s", config_filename);
dafc88b1
SH
1036 ret = 4;
1037 goto out_free;
10bea152
JS
1038 }
1039
6cbf973c
BS
1040 /*
1041 * lock is committed, so don't try to roll it back below.
1042 * NOTE: Since lockfile.c keeps a linked list of all created
1043 * lock_file structures, it isn't safe to free(lock). It's
1044 * better to just leave it hanging around.
1045 */
1046 lock = NULL;
dafc88b1
SH
1047 ret = 0;
1048
1049out_free:
6cbf973c
BS
1050 if (lock)
1051 rollback_lock_file(lock);
4cac42b1 1052 free(config_filename);
dafc88b1 1053 return ret;
93c1e079
JH
1054
1055write_err_out:
64c0d71c 1056 ret = write_error(lock->filename);
93c1e079
JH
1057 goto out_free;
1058
10bea152
JS
1059}
1060
118f8b24
PB
1061static int section_name_match (const char *buf, const char *name)
1062{
1063 int i = 0, j = 0, dot = 0;
1064 for (; buf[i] && buf[i] != ']'; i++) {
1065 if (!dot && isspace(buf[i])) {
1066 dot = 1;
1067 if (name[j++] != '.')
1068 break;
1069 for (i++; isspace(buf[i]); i++)
1070 ; /* do nothing */
1071 if (buf[i] != '"')
1072 break;
1073 continue;
1074 }
1075 if (buf[i] == '\\' && dot)
1076 i++;
1077 else if (buf[i] == '"' && dot) {
1078 for (i++; isspace(buf[i]); i++)
1079 ; /* do_nothing */
1080 break;
1081 }
1082 if (buf[i] != name[j++])
1083 break;
1084 }
1085 return (buf[i] == ']' && name[j] == 0);
1086}
1087
1088/* if new_name == NULL, the section is removed instead */
0667fcfb
JS
1089int git_config_rename_section(const char *old_name, const char *new_name)
1090{
118f8b24 1091 int ret = 0, remove = 0;
fc1905bb 1092 char *config_filename;
0667fcfb
JS
1093 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1094 int out_fd;
1095 char buf[1024];
1096
d4ebc36c 1097 config_filename = getenv(CONFIG_ENVIRONMENT);
0667fcfb 1098 if (!config_filename) {
d4ebc36c 1099 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
0667fcfb
JS
1100 if (!config_filename)
1101 config_filename = git_path("config");
1102 }
1103 config_filename = xstrdup(config_filename);
1104 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1105 if (out_fd < 0) {
64c0d71c 1106 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1107 goto out;
1108 }
0667fcfb 1109
fc1905bb 1110 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1111 /* no config file means nothing to rename, no error */
1112 goto unlock_and_out;
fc1905bb 1113 }
0667fcfb
JS
1114
1115 while (fgets(buf, sizeof(buf), config_file)) {
1116 int i;
480c9e52 1117 int length;
0667fcfb
JS
1118 for (i = 0; buf[i] && isspace(buf[i]); i++)
1119 ; /* do nothing */
1120 if (buf[i] == '[') {
1121 /* it's a section */
118f8b24
PB
1122 if (section_name_match (&buf[i+1], old_name)) {
1123 ret++;
1124 if (new_name == NULL) {
1125 remove = 1;
0667fcfb
JS
1126 continue;
1127 }
0667fcfb 1128 store.baselen = strlen(new_name);
480c9e52 1129 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1130 ret = write_error(lock->filename);
480c9e52
AW
1131 goto out;
1132 }
0667fcfb
JS
1133 continue;
1134 }
118f8b24 1135 remove = 0;
0667fcfb 1136 }
118f8b24
PB
1137 if (remove)
1138 continue;
480c9e52
AW
1139 length = strlen(buf);
1140 if (write_in_full(out_fd, buf, length) != length) {
64c0d71c 1141 ret = write_error(lock->filename);
480c9e52
AW
1142 goto out;
1143 }
0667fcfb 1144 }
fc1905bb 1145 fclose(config_file);
01ebb9dc 1146 unlock_and_out:
4ed7cd3a 1147 if (commit_lock_file(lock) < 0)
64c0d71c 1148 ret = error("could not commit config file %s", config_filename);
fc1905bb
JH
1149 out:
1150 free(config_filename);
0667fcfb
JS
1151 return ret;
1152}
40ea4ed9
JH
1153
1154/*
1155 * Call this to report error for your variable that should not
1156 * get a boolean value (i.e. "[my] var" means "true").
1157 */
1158int config_error_nonbool(const char *var)
1159{
1160 return error("Missing value for '%s'", var);
1161}