merge-base: die with an error message if not passed a commit ref
[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
dc871831
DB
19const char *config_exclusive_filename = NULL;
20
17712991
LT
21static int get_next_char(void)
22{
23 int c;
24 FILE *f;
25
26 c = '\n';
27 if ((f = config_file) != NULL) {
28 c = fgetc(f);
db2c075d
JH
29 if (c == '\r') {
30 /* DOS like systems */
31 c = fgetc(f);
32 if (c != '\n') {
33 ungetc(c, f);
34 c = '\r';
35 }
36 }
17712991
LT
37 if (c == '\n')
38 config_linenr++;
39 if (c == EOF) {
02e5ba4a 40 config_file_eof = 1;
17712991
LT
41 c = '\n';
42 }
43 }
44 return c;
45}
46
47static char *parse_value(void)
48{
49 static char value[1024];
50 int quote = 0, comment = 0, len = 0, space = 0;
51
52 for (;;) {
53 int c = get_next_char();
54 if (len >= sizeof(value))
55 return NULL;
56 if (c == '\n') {
57 if (quote)
58 return NULL;
59 value[len] = 0;
60 return value;
61 }
62 if (comment)
63 continue;
64 if (isspace(c) && !quote) {
65 space = 1;
66 continue;
67 }
7ebdba61
JS
68 if (!quote) {
69 if (c == ';' || c == '#') {
70 comment = 1;
71 continue;
72 }
73 }
17712991
LT
74 if (space) {
75 if (len)
76 value[len++] = ' ';
77 space = 0;
78 }
79 if (c == '\\') {
80 c = get_next_char();
81 switch (c) {
82 case '\n':
83 continue;
84 case 't':
85 c = '\t';
86 break;
87 case 'b':
88 c = '\b';
89 break;
90 case 'n':
91 c = '\n';
92 break;
5cbb401d
LT
93 /* Some characters escape as themselves */
94 case '\\': case '"':
95 break;
96 /* Reject unknown escape sequences */
97 default:
98 return NULL;
17712991
LT
99 }
100 value[len++] = c;
101 continue;
102 }
103 if (c == '"') {
104 quote = 1-quote;
105 continue;
106 }
17712991
LT
107 value[len++] = c;
108 }
109}
110
38c5afa8
LT
111static inline int iskeychar(int c)
112{
113 return isalnum(c) || c == '-';
114}
115
ef90d6d4 116static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
17712991
LT
117{
118 int c;
119 char *value;
120
121 /* Get the full name */
122 for (;;) {
123 c = get_next_char();
02e5ba4a 124 if (config_file_eof)
17712991 125 break;
38c5afa8 126 if (!iskeychar(c))
17712991
LT
127 break;
128 name[len++] = tolower(c);
129 if (len >= MAXNAME)
130 return -1;
131 }
132 name[len] = 0;
133 while (c == ' ' || c == '\t')
134 c = get_next_char();
135
136 value = NULL;
137 if (c != '\n') {
138 if (c != '=')
139 return -1;
140 value = parse_value();
141 if (!value)
142 return -1;
143 }
ef90d6d4 144 return fn(name, value, data);
17712991
LT
145}
146
d14f7764
LT
147static int get_extended_base_var(char *name, int baselen, int c)
148{
149 do {
150 if (c == '\n')
151 return -1;
152 c = get_next_char();
153 } while (isspace(c));
154
155 /* We require the format to be '[base "extension"]' */
156 if (c != '"')
157 return -1;
158 name[baselen++] = '.';
159
160 for (;;) {
161 int c = get_next_char();
162 if (c == '\n')
163 return -1;
164 if (c == '"')
165 break;
166 if (c == '\\') {
167 c = get_next_char();
168 if (c == '\n')
169 return -1;
170 }
171 name[baselen++] = c;
172 if (baselen > MAXNAME / 2)
173 return -1;
174 }
175
176 /* Final ']' */
177 if (get_next_char() != ']')
178 return -1;
179 return baselen;
180}
181
17712991
LT
182static int get_base_var(char *name)
183{
184 int baselen = 0;
185
186 for (;;) {
187 int c = get_next_char();
02e5ba4a 188 if (config_file_eof)
17712991
LT
189 return -1;
190 if (c == ']')
191 return baselen;
d14f7764
LT
192 if (isspace(c))
193 return get_extended_base_var(name, baselen, c);
38c5afa8 194 if (!iskeychar(c) && c != '.')
17712991
LT
195 return -1;
196 if (baselen > MAXNAME / 2)
197 return -1;
198 name[baselen++] = tolower(c);
199 }
200}
201
ef90d6d4 202static int git_parse_file(config_fn_t fn, void *data)
17712991
LT
203{
204 int comment = 0;
205 int baselen = 0;
206 static char var[MAXNAME];
207
208 for (;;) {
209 int c = get_next_char();
210 if (c == '\n') {
02e5ba4a 211 if (config_file_eof)
17712991
LT
212 return 0;
213 comment = 0;
214 continue;
215 }
216 if (comment || isspace(c))
217 continue;
218 if (c == '#' || c == ';') {
219 comment = 1;
220 continue;
221 }
222 if (c == '[') {
223 baselen = get_base_var(var);
224 if (baselen <= 0)
225 break;
226 var[baselen++] = '.';
227 var[baselen] = 0;
228 continue;
229 }
230 if (!isalpha(c))
231 break;
128af9d1 232 var[baselen] = tolower(c);
ef90d6d4 233 if (get_value(fn, data, var, baselen+1) < 0)
17712991
LT
234 break;
235 }
4f629539 236 die("bad config file line %d in %s", config_linenr, config_file_name);
17712991
LT
237}
238
c8deb5a1 239static int parse_unit_factor(const char *end, unsigned long *val)
0b87b6e0
BD
240{
241 if (!*end)
242 return 1;
c8deb5a1
SP
243 else if (!strcasecmp(end, "k")) {
244 *val *= 1024;
245 return 1;
246 }
247 else if (!strcasecmp(end, "m")) {
248 *val *= 1024 * 1024;
249 return 1;
250 }
251 else if (!strcasecmp(end, "g")) {
252 *val *= 1024 * 1024 * 1024;
253 return 1;
254 }
255 return 0;
0b87b6e0
BD
256}
257
258int git_parse_long(const char *value, long *ret)
259{
260 if (value && *value) {
261 char *end;
262 long val = strtol(value, &end, 0);
c8deb5a1
SP
263 unsigned long factor = 1;
264 if (!parse_unit_factor(end, &factor))
265 return 0;
266 *ret = val * factor;
0b87b6e0
BD
267 return 1;
268 }
269 return 0;
270}
271
272int git_parse_ulong(const char *value, unsigned long *ret)
17712991
LT
273{
274 if (value && *value) {
275 char *end;
0b87b6e0 276 unsigned long val = strtoul(value, &end, 0);
c8deb5a1
SP
277 if (!parse_unit_factor(end, &val))
278 return 0;
279 *ret = val;
0b87b6e0 280 return 1;
17712991 281 }
0b87b6e0
BD
282 return 0;
283}
284
c1867cea
JK
285static void die_bad_config(const char *name)
286{
287 if (config_file_name)
288 die("bad config value for '%s' in %s", name, config_file_name);
289 die("bad config value for '%s'", name);
290}
291
0b87b6e0
BD
292int git_config_int(const char *name, const char *value)
293{
294 long ret;
295 if (!git_parse_long(value, &ret))
c1867cea 296 die_bad_config(name);
0b87b6e0
BD
297 return ret;
298}
299
300unsigned long git_config_ulong(const char *name, const char *value)
301{
302 unsigned long ret;
303 if (!git_parse_ulong(value, &ret))
c1867cea 304 die_bad_config(name);
0b87b6e0 305 return ret;
17712991
LT
306}
307
a53f2ec6 308int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
17712991 309{
a53f2ec6 310 *is_bool = 1;
17712991
LT
311 if (!value)
312 return 1;
313 if (!*value)
314 return 0;
624314fd 315 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
17712991 316 return 1;
624314fd 317 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
17712991 318 return 0;
a53f2ec6 319 *is_bool = 0;
c35b0b58 320 return git_config_int(name, value);
17712991
LT
321}
322
a53f2ec6
JH
323int git_config_bool(const char *name, const char *value)
324{
325 int discard;
c35b0b58 326 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
327}
328
ea5105a5
CC
329int git_config_string(const char **dest, const char *var, const char *value)
330{
331 if (!value)
332 return config_error_nonbool(var);
333 *dest = xstrdup(value);
334 return 0;
335}
336
806e2ad7 337static int git_default_core_config(const char *var, const char *value)
17712991
LT
338{
339 /* This needs a better name */
340 if (!strcmp(var, "core.filemode")) {
341 trust_executable_bit = git_config_bool(var, value);
342 return 0;
343 }
344
9378c161
JH
345 if (!strcmp(var, "core.quotepath")) {
346 quote_path_fully = git_config_bool(var, value);
347 return 0;
348 }
349
78a8d641
JS
350 if (!strcmp(var, "core.symlinks")) {
351 has_symlinks = git_config_bool(var, value);
352 return 0;
353 }
354
0a9b88b7
LT
355 if (!strcmp(var, "core.ignorecase")) {
356 ignore_case = git_config_bool(var, value);
357 return 0;
358 }
359
7d1864ce
JH
360 if (!strcmp(var, "core.bare")) {
361 is_bare_repository_cfg = git_config_bool(var, value);
362 return 0;
363 }
364
5f73076c
JH
365 if (!strcmp(var, "core.ignorestat")) {
366 assume_unchanged = git_config_bool(var, value);
367 return 0;
368 }
369
e388c738
JH
370 if (!strcmp(var, "core.prefersymlinkrefs")) {
371 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
372 return 0;
373 }
374
6de08ae6
SP
375 if (!strcmp(var, "core.logallrefupdates")) {
376 log_all_ref_updates = git_config_bool(var, value);
377 return 0;
378 }
379
2f8acdb3
JH
380 if (!strcmp(var, "core.warnambiguousrefs")) {
381 warn_ambiguous_refs = git_config_bool(var, value);
382 return 0;
383 }
384
960ccca6 385 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
386 int level = git_config_int(var, value);
387 if (level == -1)
388 level = Z_DEFAULT_COMPRESSION;
389 else if (level < 0 || level > Z_BEST_COMPRESSION)
390 die("bad zlib compression level %d", level);
391 zlib_compression_level = level;
960ccca6
DH
392 zlib_compression_seen = 1;
393 return 0;
394 }
395
396 if (!strcmp(var, "core.compression")) {
397 int level = git_config_int(var, value);
398 if (level == -1)
399 level = Z_DEFAULT_COMPRESSION;
400 else if (level < 0 || level > Z_BEST_COMPRESSION)
401 die("bad zlib compression level %d", level);
402 core_compression_level = level;
403 core_compression_seen = 1;
404 if (!zlib_compression_seen)
405 zlib_compression_level = level;
12f6c308
JBH
406 return 0;
407 }
408
60bb8b14 409 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 410 int pgsz_x2 = getpagesize() * 2;
60bb8b14 411 packed_git_window_size = git_config_int(var, value);
5faaf246
JH
412
413 /* This value must be multiple of (pagesize * 2) */
414 packed_git_window_size /= pgsz_x2;
415 if (packed_git_window_size < 1)
416 packed_git_window_size = 1;
417 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
418 return 0;
419 }
420
77ccc5bb
SP
421 if (!strcmp(var, "core.packedgitlimit")) {
422 packed_git_limit = git_config_int(var, value);
423 return 0;
424 }
425
18bdec11
SP
426 if (!strcmp(var, "core.deltabasecachelimit")) {
427 delta_base_cache_limit = git_config_int(var, value);
428 return 0;
429 }
430
6c510bee 431 if (!strcmp(var, "core.autocrlf")) {
d7f46334
LT
432 if (value && !strcasecmp(value, "input")) {
433 auto_crlf = -1;
434 return 0;
435 }
6c510bee
LT
436 auto_crlf = git_config_bool(var, value);
437 return 0;
438 }
439
21e5ad50
SP
440 if (!strcmp(var, "core.safecrlf")) {
441 if (value && !strcasecmp(value, "warn")) {
442 safe_crlf = SAFE_CRLF_WARN;
443 return 0;
444 }
445 safe_crlf = git_config_bool(var, value);
446 return 0;
447 }
448
806e2ad7
LT
449 if (!strcmp(var, "core.pager"))
450 return git_config_string(&pager_program, var, value);
451
452 if (!strcmp(var, "core.editor"))
453 return git_config_string(&editor_program, var, value);
454
455 if (!strcmp(var, "core.excludesfile"))
456 return git_config_string(&excludes_file, var, value);
457
458 if (!strcmp(var, "core.whitespace")) {
459 if (!value)
460 return config_error_nonbool(var);
461 whitespace_rule_cfg = parse_whitespace_rule(value);
462 return 0;
463 }
464
aafe9fba
LT
465 if (!strcmp(var, "core.fsyncobjectfiles")) {
466 fsync_object_files = git_config_bool(var, value);
467 return 0;
468 }
469
806e2ad7
LT
470 /* Add other config variables here and to Documentation/config.txt. */
471 return 0;
472}
473
d1364529 474static int git_default_user_config(const char *var, const char *value)
806e2ad7 475{
e1b10391 476 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
477 if (!value)
478 return config_error_nonbool(var);
817151e6 479 strlcpy(git_default_name, value, sizeof(git_default_name));
bb1ae3f6
SB
480 if (git_default_email[0])
481 user_ident_explicitly_given = 1;
e1b10391
LT
482 return 0;
483 }
484
485 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
486 if (!value)
487 return config_error_nonbool(var);
817151e6 488 strlcpy(git_default_email, value, sizeof(git_default_email));
bb1ae3f6
SB
489 if (git_default_name[0])
490 user_ident_explicitly_given = 1;
e1b10391
LT
491 return 0;
492 }
493
d1364529
LT
494 /* Add other config variables here and to Documentation/config.txt. */
495 return 0;
496}
497
1141f492 498static int git_default_i18n_config(const char *var, const char *value)
d1364529 499{
ea5105a5
CC
500 if (!strcmp(var, "i18n.commitencoding"))
501 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 502
ea5105a5
CC
503 if (!strcmp(var, "i18n.logoutputencoding"))
504 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 505
1141f492
LT
506 /* Add other config variables here and to Documentation/config.txt. */
507 return 0;
508}
039bc64e 509
1141f492
LT
510static int git_default_branch_config(const char *var, const char *value)
511{
9ed36cfa
JS
512 if (!strcmp(var, "branch.autosetupmerge")) {
513 if (value && !strcasecmp(value, "always")) {
514 git_branch_track = BRANCH_TRACK_ALWAYS;
515 return 0;
516 }
517 git_branch_track = git_config_bool(var, value);
518 return 0;
519 }
c998ae9b
DS
520 if (!strcmp(var, "branch.autosetuprebase")) {
521 if (!value)
522 return config_error_nonbool(var);
523 else if (!strcmp(value, "never"))
524 autorebase = AUTOREBASE_NEVER;
525 else if (!strcmp(value, "local"))
526 autorebase = AUTOREBASE_LOCAL;
527 else if (!strcmp(value, "remote"))
528 autorebase = AUTOREBASE_REMOTE;
529 else if (!strcmp(value, "always"))
530 autorebase = AUTOREBASE_ALWAYS;
531 else
532 return error("Malformed value for %s", var);
533 return 0;
534 }
a9cc857a 535
1ab661dd 536 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
537 return 0;
538}
539
1141f492
LT
540int git_default_config(const char *var, const char *value, void *dummy)
541{
542 if (!prefixcmp(var, "core."))
543 return git_default_core_config(var, value);
544
545 if (!prefixcmp(var, "user."))
546 return git_default_user_config(var, value);
547
548 if (!prefixcmp(var, "i18n."))
549 return git_default_i18n_config(var, value);
550
551 if (!prefixcmp(var, "branch."))
552 return git_default_branch_config(var, value);
553
554 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
555 pager_use_color = git_config_bool(var,value);
556 return 0;
557 }
558
559 /* Add other config variables here and to Documentation/config.txt. */
560 return 0;
561}
562
ef90d6d4 563int git_config_from_file(config_fn_t fn, const char *filename, void *data)
17712991
LT
564{
565 int ret;
4f629539 566 FILE *f = fopen(filename, "r");
17712991
LT
567
568 ret = -1;
569 if (f) {
570 config_file = f;
4f629539 571 config_file_name = filename;
17712991 572 config_linenr = 1;
02e5ba4a 573 config_file_eof = 0;
ef90d6d4 574 ret = git_parse_file(fn, data);
17712991 575 fclose(f);
4f629539 576 config_file_name = NULL;
17712991
LT
577 }
578 return ret;
579}
10bea152 580
506b17b1
JS
581const char *git_etc_gitconfig(void)
582{
7f0e39fa 583 static const char *system_wide;
2de9de5e
SP
584 if (!system_wide)
585 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 586 return system_wide;
506b17b1
JS
587}
588
e4bffb5a 589static int git_env_bool(const char *k, int def)
ab88c363
JK
590{
591 const char *v = getenv(k);
592 return v ? git_config_bool(k, v) : def;
593}
594
595int git_config_system(void)
596{
597 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
598}
599
600int git_config_global(void)
601{
602 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
603}
604
ef90d6d4 605int git_config(config_fn_t fn, void *data)
4f629539 606{
5f1a63e0
JS
607 int ret = 0;
608 char *repo_config = NULL;
dc871831 609 const char *home = NULL;
5f1a63e0
JS
610
611 /* $GIT_CONFIG makes git read _only_ the given config file,
612 * $GIT_CONFIG_LOCAL will make it process it in addition to the
613 * global config file, the same way it would the per-repository
614 * config file otherwise. */
dc871831
DB
615 if (config_exclusive_filename)
616 return git_config_from_file(fn, config_exclusive_filename, data);
617 if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
618 ret += git_config_from_file(fn, git_etc_gitconfig(),
619 data);
5f1a63e0 620
dc871831 621 home = getenv("HOME");
ab88c363 622 if (git_config_global() && home) {
9befac47 623 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
e33d0611 624 if (!access(user_config, R_OK))
dc871831 625 ret += git_config_from_file(fn, user_config, data);
5f1a63e0
JS
626 free(user_config);
627 }
628
dc871831
DB
629 repo_config = xstrdup(git_path("config"));
630 ret += git_config_from_file(fn, repo_config, data);
4cac42b1 631 free(repo_config);
5f1a63e0 632 return ret;
4f629539
JH
633}
634
10bea152
JS
635/*
636 * Find all the stuff for git_config_set() below.
637 */
4ddba79d
JS
638
639#define MAX_MATCHES 512
640
10bea152
JS
641static struct {
642 int baselen;
643 char* key;
f98d863d 644 int do_not_match;
10bea152 645 regex_t* value_regex;
4ddba79d 646 int multi_replace;
dc49cd76 647 size_t offset[MAX_MATCHES];
10bea152
JS
648 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
649 int seen;
650} store;
651
f98d863d
JS
652static int matches(const char* key, const char* value)
653{
654 return !strcmp(key, store.key) &&
655 (store.value_regex == NULL ||
656 (store.do_not_match ^
657 !regexec(store.value_regex, value, 0, NULL, 0)));
658}
659
ef90d6d4 660static int store_aux(const char* key, const char* value, void *cb)
10bea152 661{
ae9ee41d
JH
662 const char *ep;
663 size_t section_len;
664
10bea152
JS
665 switch (store.state) {
666 case KEY_SEEN:
f98d863d 667 if (matches(key, value)) {
4ddba79d 668 if (store.seen == 1 && store.multi_replace == 0) {
64c0d71c 669 warning("%s has multiple values", key);
4ddba79d 670 } else if (store.seen >= MAX_MATCHES) {
64c0d71c 671 error("too many matches for %s", key);
4ddba79d 672 return 1;
10bea152 673 }
4ddba79d
JS
674
675 store.offset[store.seen] = ftell(config_file);
10bea152
JS
676 store.seen++;
677 }
678 break;
679 case SECTION_SEEN:
ae9ee41d
JH
680 /*
681 * What we are looking for is in store.key (both
682 * section and var), and its section part is baselen
683 * long. We found key (again, both section and var).
684 * We would want to know if this key is in the same
685 * section as what we are looking for. We already
686 * know we are in the same section as what should
687 * hold store.key.
688 */
689 ep = strrchr(key, '.');
690 section_len = ep - key;
691
692 if ((section_len != store.baselen) ||
693 memcmp(key, store.key, section_len+1)) {
10bea152
JS
694 store.state = SECTION_END_SEEN;
695 break;
ae9ee41d
JH
696 }
697
698 /*
699 * Do not increment matches: this is no match, but we
700 * just made sure we are in the desired section.
701 */
702 store.offset[store.seen] = ftell(config_file);
10bea152
JS
703 /* fallthru */
704 case SECTION_END_SEEN:
705 case START:
f98d863d 706 if (matches(key, value)) {
4ddba79d 707 store.offset[store.seen] = ftell(config_file);
10bea152
JS
708 store.state = KEY_SEEN;
709 store.seen++;
d14f7764
LT
710 } else {
711 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 712 !strncmp(key, store.key, store.baselen)) {
93ddef3e 713 store.state = SECTION_SEEN;
bdf0ef08 714 store.offset[store.seen] = ftell(config_file);
d14f7764 715 }
bdf0ef08 716 }
10bea152
JS
717 }
718 return 0;
719}
720
64c0d71c 721static int write_error(const char *filename)
480c9e52 722{
64c0d71c 723 error("failed to write new configuration file %s", filename);
480c9e52
AW
724
725 /* Same error code as "failed to rename". */
726 return 4;
727}
728
729static int store_write_section(int fd, const char* key)
10bea152 730{
cb891a59
KH
731 const char *dot;
732 int i, success;
733 struct strbuf sb;
d14f7764 734
cb891a59
KH
735 strbuf_init(&sb, 0);
736 dot = memchr(key, '.', store.baselen);
d14f7764 737 if (dot) {
cb891a59
KH
738 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
739 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 740 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
741 strbuf_addch(&sb, '\\');
742 strbuf_addch(&sb, key[i]);
d14f7764 743 }
cb891a59
KH
744 strbuf_addstr(&sb, "\"]\n");
745 } else {
746 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
747 }
748
cb891a59
KH
749 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
750 strbuf_release(&sb);
480c9e52 751
cb891a59 752 return success;
10bea152
JS
753}
754
480c9e52 755static int store_write_pair(int fd, const char* key, const char* value)
10bea152 756{
cb891a59
KH
757 int i, success;
758 int length = strlen(key + store.baselen + 1);
759 const char *quote = "";
760 struct strbuf sb;
cdd4fb15 761
6281f394
JM
762 /*
763 * Check to see if the value needs to be surrounded with a dq pair.
764 * Note that problematic characters are always backslash-quoted; this
765 * check is about not losing leading or trailing SP and strings that
766 * follow beginning-of-comment characters (i.e. ';' and '#') by the
767 * configuration parser.
768 */
cdd4fb15 769 if (value[0] == ' ')
cb891a59 770 quote = "\"";
cdd4fb15
BG
771 for (i = 0; value[i]; i++)
772 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
773 quote = "\"";
774 if (i && value[i - 1] == ' ')
775 quote = "\"";
776
777 strbuf_init(&sb, 0);
778 strbuf_addf(&sb, "\t%.*s = %s",
779 length, key + store.baselen + 1, quote);
10bea152 780
10bea152
JS
781 for (i = 0; value[i]; i++)
782 switch (value[i]) {
480c9e52 783 case '\n':
cb891a59 784 strbuf_addstr(&sb, "\\n");
480c9e52
AW
785 break;
786 case '\t':
cb891a59 787 strbuf_addstr(&sb, "\\t");
480c9e52
AW
788 break;
789 case '"':
790 case '\\':
cb891a59 791 strbuf_addch(&sb, '\\');
480c9e52 792 default:
cb891a59 793 strbuf_addch(&sb, value[i]);
480c9e52
AW
794 break;
795 }
cb891a59
KH
796 strbuf_addf(&sb, "%s\n", quote);
797
798 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
799 strbuf_release(&sb);
800
801 return success;
10bea152
JS
802}
803
dc49cd76
SP
804static ssize_t find_beginning_of_line(const char* contents, size_t size,
805 size_t offset_, int* found_bracket)
4ddba79d 806{
dc49cd76
SP
807 size_t equal_offset = size, bracket_offset = size;
808 ssize_t offset;
4ddba79d 809
7a31cc0f 810contline:
a6080a0a 811 for (offset = offset_-2; offset > 0
4ddba79d
JS
812 && contents[offset] != '\n'; offset--)
813 switch (contents[offset]) {
814 case '=': equal_offset = offset; break;
815 case ']': bracket_offset = offset; break;
816 }
7a31cc0f
FL
817 if (offset > 0 && contents[offset-1] == '\\') {
818 offset_ = offset;
819 goto contline;
820 }
4ddba79d
JS
821 if (bracket_offset < equal_offset) {
822 *found_bracket = 1;
823 offset = bracket_offset+1;
824 } else
825 offset++;
826
827 return offset;
828}
829
10bea152
JS
830int git_config_set(const char* key, const char* value)
831{
4ddba79d 832 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
833}
834
835/*
836 * If value==NULL, unset in (remove from) config,
837 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
838 * if multi_replace==0, nothing, or only one matching key/value is replaced,
839 * else all matching key/values (regardless how many) are removed,
840 * before the new pair is written.
10bea152
JS
841 *
842 * Returns 0 on success.
843 *
844 * This function does this:
845 *
846 * - it locks the config file by creating ".git/config.lock"
847 *
848 * - it then parses the config using store_aux() as validator to find
849 * the position on the key/value pair to replace. If it is to be unset,
850 * it must be found exactly once.
851 *
852 * - the config file is mmap()ed and the part before the match (if any) is
853 * written to the lock file, then the changed part and the rest.
854 *
855 * - the config file is removed and the lock file rename()d to it.
856 *
857 */
858int git_config_set_multivar(const char* key, const char* value,
4ddba79d 859 const char* value_regex, int multi_replace)
10bea152 860{
d14f7764 861 int i, dot;
f8ba655e 862 int fd = -1, in_fd;
dafc88b1 863 int ret;
9c3796fc 864 char* config_filename;
6cbf973c 865 struct lock_file *lock = NULL;
b17e659d 866 const char* last_dot = strrchr(key, '.');
4ddba79d 867
dc871831
DB
868 if (config_exclusive_filename)
869 config_filename = xstrdup(config_exclusive_filename);
870 else
871 config_filename = xstrdup(git_path("config"));
9c3796fc 872
10bea152
JS
873 /*
874 * Since "key" actually contains the section name and the real
875 * key name separated by a dot, we have to know where the dot is.
876 */
b17e659d 877
dafc88b1 878 if (last_dot == NULL) {
64c0d71c 879 error("key does not contain a section: %s", key);
dafc88b1
SH
880 ret = 2;
881 goto out_free;
10bea152 882 }
b17e659d
JS
883 store.baselen = last_dot - key;
884
885 store.multi_replace = multi_replace;
10bea152
JS
886
887 /*
888 * Validate the key and while at it, lower case it for matching.
889 */
2d7320d0 890 store.key = xmalloc(strlen(key) + 1);
d14f7764
LT
891 dot = 0;
892 for (i = 0; key[i]; i++) {
893 unsigned char c = key[i];
894 if (c == '.')
895 dot = 1;
896 /* Leave the extended basename untouched.. */
897 if (!dot || i > store.baselen) {
38c5afa8 898 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
64c0d71c 899 error("invalid key: %s", key);
d14f7764
LT
900 free(store.key);
901 ret = 1;
902 goto out_free;
903 }
904 c = tolower(c);
6f71686e 905 } else if (c == '\n') {
64c0d71c 906 error("invalid key (newline): %s", key);
6f71686e
JS
907 free(store.key);
908 ret = 1;
909 goto out_free;
d14f7764
LT
910 }
911 store.key[i] = c;
912 }
3dd94e3b 913 store.key[i] = 0;
10bea152
JS
914
915 /*
6cbf973c 916 * The lock serves a purpose in addition to locking: the new
10bea152
JS
917 * contents of .git/config will be written into it.
918 */
6cbf973c
BS
919 lock = xcalloc(sizeof(struct lock_file), 1);
920 fd = hold_lock_file_for_update(lock, config_filename, 0);
921 if (fd < 0) {
64c0d71c 922 error("could not lock config file %s", config_filename);
10bea152 923 free(store.key);
dafc88b1
SH
924 ret = -1;
925 goto out_free;
10bea152
JS
926 }
927
928 /*
929 * If .git/config does not exist yet, write a minimal version.
930 */
88fb958b
AR
931 in_fd = open(config_filename, O_RDONLY);
932 if ( in_fd < 0 ) {
10bea152
JS
933 free(store.key);
934
88fb958b
AR
935 if ( ENOENT != errno ) {
936 error("opening %s: %s", config_filename,
937 strerror(errno));
dafc88b1
SH
938 ret = 3; /* same as "invalid config file" */
939 goto out_free;
88fb958b 940 }
10bea152
JS
941 /* if nothing to unset, error out */
942 if (value == NULL) {
dafc88b1
SH
943 ret = 5;
944 goto out_free;
10bea152
JS
945 }
946
947 store.key = (char*)key;
480c9e52 948 if (!store_write_section(fd, key) ||
93c1e079
JH
949 !store_write_pair(fd, key, value))
950 goto write_err_out;
951 } else {
88fb958b 952 struct stat st;
10bea152 953 char* contents;
dc49cd76
SP
954 size_t contents_sz, copy_begin, copy_end;
955 int i, new_line = 0;
10bea152
JS
956
957 if (value_regex == NULL)
958 store.value_regex = NULL;
959 else {
f98d863d
JS
960 if (value_regex[0] == '!') {
961 store.do_not_match = 1;
962 value_regex++;
963 } else
964 store.do_not_match = 0;
965
2d7320d0 966 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
967 if (regcomp(store.value_regex, value_regex,
968 REG_EXTENDED)) {
64c0d71c 969 error("invalid pattern: %s", value_regex);
10bea152 970 free(store.value_regex);
dafc88b1
SH
971 ret = 6;
972 goto out_free;
10bea152
JS
973 }
974 }
975
4ddba79d 976 store.offset[0] = 0;
10bea152
JS
977 store.state = START;
978 store.seen = 0;
979
980 /*
981 * After this, store.offset will contain the *end* offset
982 * of the last match, or remain at 0 if no match was found.
983 * As a side effect, we make sure to transform only a valid
984 * existing config file.
985 */
ef90d6d4 986 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 987 error("invalid config file %s", config_filename);
10bea152
JS
988 free(store.key);
989 if (store.value_regex != NULL) {
990 regfree(store.value_regex);
991 free(store.value_regex);
992 }
dafc88b1
SH
993 ret = 3;
994 goto out_free;
10bea152
JS
995 }
996
997 free(store.key);
998 if (store.value_regex != NULL) {
999 regfree(store.value_regex);
1000 free(store.value_regex);
1001 }
1002
4ddba79d
JS
1003 /* if nothing to unset, or too many matches, error out */
1004 if ((store.seen == 0 && value == NULL) ||
1005 (store.seen > 1 && multi_replace == 0)) {
dafc88b1
SH
1006 ret = 5;
1007 goto out_free;
10bea152
JS
1008 }
1009
88fb958b 1010 fstat(in_fd, &st);
dc49cd76
SP
1011 contents_sz = xsize_t(st.st_size);
1012 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
1013 MAP_PRIVATE, in_fd, 0);
1014 close(in_fd);
1015
4ddba79d
JS
1016 if (store.seen == 0)
1017 store.seen = 1;
1018
1019 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1020 if (store.offset[i] == 0) {
dc49cd76 1021 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
1022 } else if (store.state != KEY_SEEN) {
1023 copy_end = store.offset[i];
10bea152 1024 } else
4ddba79d 1025 copy_end = find_beginning_of_line(
dc49cd76 1026 contents, contents_sz,
4ddba79d
JS
1027 store.offset[i]-2, &new_line);
1028
02e5ba4a
JK
1029 if (copy_end > 0 && contents[copy_end-1] != '\n')
1030 new_line = 1;
1031
4ddba79d
JS
1032 /* write the first part of the config */
1033 if (copy_end > copy_begin) {
93c1e079
JH
1034 if (write_in_full(fd, contents + copy_begin,
1035 copy_end - copy_begin) <
1036 copy_end - copy_begin)
1037 goto write_err_out;
1038 if (new_line &&
1039 write_in_full(fd, "\n", 1) != 1)
1040 goto write_err_out;
4ddba79d
JS
1041 }
1042 copy_begin = store.offset[i];
10bea152
JS
1043 }
1044
10bea152
JS
1045 /* write the pair (value == NULL means unset) */
1046 if (value != NULL) {
93c1e079
JH
1047 if (store.state == START) {
1048 if (!store_write_section(fd, key))
1049 goto write_err_out;
480c9e52 1050 }
93c1e079
JH
1051 if (!store_write_pair(fd, key, value))
1052 goto write_err_out;
10bea152
JS
1053 }
1054
1055 /* write the rest of the config */
dc49cd76 1056 if (copy_begin < contents_sz)
93c1e079 1057 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
1058 contents_sz - copy_begin) <
1059 contents_sz - copy_begin)
93c1e079 1060 goto write_err_out;
10bea152 1061
dc49cd76 1062 munmap(contents, contents_sz);
10bea152
JS
1063 }
1064
4ed7cd3a 1065 if (commit_lock_file(lock) < 0) {
64c0d71c 1066 error("could not commit config file %s", config_filename);
dafc88b1
SH
1067 ret = 4;
1068 goto out_free;
10bea152
JS
1069 }
1070
6cbf973c
BS
1071 /*
1072 * lock is committed, so don't try to roll it back below.
1073 * NOTE: Since lockfile.c keeps a linked list of all created
1074 * lock_file structures, it isn't safe to free(lock). It's
1075 * better to just leave it hanging around.
1076 */
1077 lock = NULL;
dafc88b1
SH
1078 ret = 0;
1079
1080out_free:
6cbf973c
BS
1081 if (lock)
1082 rollback_lock_file(lock);
4cac42b1 1083 free(config_filename);
dafc88b1 1084 return ret;
93c1e079
JH
1085
1086write_err_out:
64c0d71c 1087 ret = write_error(lock->filename);
93c1e079
JH
1088 goto out_free;
1089
10bea152
JS
1090}
1091
118f8b24
PB
1092static int section_name_match (const char *buf, const char *name)
1093{
1094 int i = 0, j = 0, dot = 0;
1095 for (; buf[i] && buf[i] != ']'; i++) {
1096 if (!dot && isspace(buf[i])) {
1097 dot = 1;
1098 if (name[j++] != '.')
1099 break;
1100 for (i++; isspace(buf[i]); i++)
1101 ; /* do nothing */
1102 if (buf[i] != '"')
1103 break;
1104 continue;
1105 }
1106 if (buf[i] == '\\' && dot)
1107 i++;
1108 else if (buf[i] == '"' && dot) {
1109 for (i++; isspace(buf[i]); i++)
1110 ; /* do_nothing */
1111 break;
1112 }
1113 if (buf[i] != name[j++])
1114 break;
1115 }
1116 return (buf[i] == ']' && name[j] == 0);
1117}
1118
1119/* if new_name == NULL, the section is removed instead */
0667fcfb
JS
1120int git_config_rename_section(const char *old_name, const char *new_name)
1121{
118f8b24 1122 int ret = 0, remove = 0;
fc1905bb 1123 char *config_filename;
0667fcfb
JS
1124 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1125 int out_fd;
1126 char buf[1024];
1127
dc871831
DB
1128 if (config_exclusive_filename)
1129 config_filename = xstrdup(config_exclusive_filename);
1130 else
1131 config_filename = xstrdup(git_path("config"));
0667fcfb 1132 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 1133 if (out_fd < 0) {
64c0d71c 1134 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
1135 goto out;
1136 }
0667fcfb 1137
fc1905bb 1138 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1139 /* no config file means nothing to rename, no error */
1140 goto unlock_and_out;
fc1905bb 1141 }
0667fcfb
JS
1142
1143 while (fgets(buf, sizeof(buf), config_file)) {
1144 int i;
480c9e52 1145 int length;
0667fcfb
JS
1146 for (i = 0; buf[i] && isspace(buf[i]); i++)
1147 ; /* do nothing */
1148 if (buf[i] == '[') {
1149 /* it's a section */
118f8b24
PB
1150 if (section_name_match (&buf[i+1], old_name)) {
1151 ret++;
1152 if (new_name == NULL) {
1153 remove = 1;
0667fcfb
JS
1154 continue;
1155 }
0667fcfb 1156 store.baselen = strlen(new_name);
480c9e52 1157 if (!store_write_section(out_fd, new_name)) {
64c0d71c 1158 ret = write_error(lock->filename);
480c9e52
AW
1159 goto out;
1160 }
0667fcfb
JS
1161 continue;
1162 }
118f8b24 1163 remove = 0;
0667fcfb 1164 }
118f8b24
PB
1165 if (remove)
1166 continue;
480c9e52
AW
1167 length = strlen(buf);
1168 if (write_in_full(out_fd, buf, length) != length) {
64c0d71c 1169 ret = write_error(lock->filename);
480c9e52
AW
1170 goto out;
1171 }
0667fcfb 1172 }
fc1905bb 1173 fclose(config_file);
01ebb9dc 1174 unlock_and_out:
4ed7cd3a 1175 if (commit_lock_file(lock) < 0)
64c0d71c 1176 ret = error("could not commit config file %s", config_filename);
fc1905bb
JH
1177 out:
1178 free(config_filename);
0667fcfb
JS
1179 return ret;
1180}
40ea4ed9
JH
1181
1182/*
1183 * Call this to report error for your variable that should not
1184 * get a boolean value (i.e. "[my] var" means "true").
1185 */
1186int config_error_nonbool(const char *var)
1187{
1188 return error("Missing value for '%s'", var);
1189}