prefix_path: use is_absolute_path() instead of *orig == '/'
[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
17712991
LT
114static int get_value(config_fn_t fn, char *name, unsigned int len)
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 }
142 return fn(name, value);
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
200static int git_parse_file(config_fn_t fn)
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);
17712991
LT
231 if (get_value(fn, var, baselen+1) < 0)
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
283int git_config_int(const char *name, const char *value)
284{
285 long ret;
286 if (!git_parse_long(value, &ret))
287 die("bad config value for '%s' in %s", name, config_file_name);
288 return ret;
289}
290
291unsigned long git_config_ulong(const char *name, const char *value)
292{
293 unsigned long ret;
294 if (!git_parse_ulong(value, &ret))
295 die("bad config value for '%s' in %s", name, config_file_name);
296 return ret;
17712991
LT
297}
298
299int git_config_bool(const char *name, const char *value)
300{
301 if (!value)
302 return 1;
303 if (!*value)
304 return 0;
624314fd 305 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
17712991 306 return 1;
624314fd 307 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
17712991
LT
308 return 0;
309 return git_config_int(name, value) != 0;
310}
311
ea5105a5
CC
312int git_config_string(const char **dest, const char *var, const char *value)
313{
314 if (!value)
315 return config_error_nonbool(var);
316 *dest = xstrdup(value);
317 return 0;
318}
319
17712991
LT
320int git_default_config(const char *var, const char *value)
321{
322 /* This needs a better name */
323 if (!strcmp(var, "core.filemode")) {
324 trust_executable_bit = git_config_bool(var, value);
325 return 0;
326 }
327
9378c161
JH
328 if (!strcmp(var, "core.quotepath")) {
329 quote_path_fully = git_config_bool(var, value);
330 return 0;
331 }
332
78a8d641
JS
333 if (!strcmp(var, "core.symlinks")) {
334 has_symlinks = git_config_bool(var, value);
335 return 0;
336 }
337
7d1864ce
JH
338 if (!strcmp(var, "core.bare")) {
339 is_bare_repository_cfg = git_config_bool(var, value);
340 return 0;
341 }
342
5f73076c
JH
343 if (!strcmp(var, "core.ignorestat")) {
344 assume_unchanged = git_config_bool(var, value);
345 return 0;
346 }
347
e388c738
JH
348 if (!strcmp(var, "core.prefersymlinkrefs")) {
349 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
350 return 0;
351 }
352
6de08ae6
SP
353 if (!strcmp(var, "core.logallrefupdates")) {
354 log_all_ref_updates = git_config_bool(var, value);
355 return 0;
356 }
357
2f8acdb3
JH
358 if (!strcmp(var, "core.warnambiguousrefs")) {
359 warn_ambiguous_refs = git_config_bool(var, value);
360 return 0;
361 }
362
960ccca6 363 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
364 int level = git_config_int(var, value);
365 if (level == -1)
366 level = Z_DEFAULT_COMPRESSION;
367 else if (level < 0 || level > Z_BEST_COMPRESSION)
368 die("bad zlib compression level %d", level);
369 zlib_compression_level = level;
960ccca6
DH
370 zlib_compression_seen = 1;
371 return 0;
372 }
373
374 if (!strcmp(var, "core.compression")) {
375 int level = git_config_int(var, value);
376 if (level == -1)
377 level = Z_DEFAULT_COMPRESSION;
378 else if (level < 0 || level > Z_BEST_COMPRESSION)
379 die("bad zlib compression level %d", level);
380 core_compression_level = level;
381 core_compression_seen = 1;
382 if (!zlib_compression_seen)
383 zlib_compression_level = level;
12f6c308
JBH
384 return 0;
385 }
386
60bb8b14 387 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 388 int pgsz_x2 = getpagesize() * 2;
60bb8b14 389 packed_git_window_size = git_config_int(var, value);
5faaf246
JH
390
391 /* This value must be multiple of (pagesize * 2) */
392 packed_git_window_size /= pgsz_x2;
393 if (packed_git_window_size < 1)
394 packed_git_window_size = 1;
395 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
396 return 0;
397 }
398
77ccc5bb
SP
399 if (!strcmp(var, "core.packedgitlimit")) {
400 packed_git_limit = git_config_int(var, value);
401 return 0;
402 }
403
18bdec11
SP
404 if (!strcmp(var, "core.deltabasecachelimit")) {
405 delta_base_cache_limit = git_config_int(var, value);
406 return 0;
407 }
408
6c510bee 409 if (!strcmp(var, "core.autocrlf")) {
d7f46334
LT
410 if (value && !strcasecmp(value, "input")) {
411 auto_crlf = -1;
412 return 0;
413 }
6c510bee
LT
414 auto_crlf = git_config_bool(var, value);
415 return 0;
416 }
417
21e5ad50
SP
418 if (!strcmp(var, "core.safecrlf")) {
419 if (value && !strcasecmp(value, "warn")) {
420 safe_crlf = SAFE_CRLF_WARN;
421 return 0;
422 }
423 safe_crlf = git_config_bool(var, value);
424 return 0;
425 }
426
e1b10391 427 if (!strcmp(var, "user.name")) {
6c47d0e8
JH
428 if (!value)
429 return config_error_nonbool(var);
817151e6 430 strlcpy(git_default_name, value, sizeof(git_default_name));
e1b10391
LT
431 return 0;
432 }
433
434 if (!strcmp(var, "user.email")) {
6c47d0e8
JH
435 if (!value)
436 return config_error_nonbool(var);
817151e6 437 strlcpy(git_default_email, value, sizeof(git_default_email));
e1b10391
LT
438 return 0;
439 }
440
ea5105a5
CC
441 if (!strcmp(var, "i18n.commitencoding"))
442 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 443
ea5105a5
CC
444 if (!strcmp(var, "i18n.logoutputencoding"))
445 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 446
a159ca0c 447 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
aa086eb8
ML
448 pager_use_color = git_config_bool(var,value);
449 return 0;
450 }
451
872da32d
CC
452 if (!strcmp(var, "core.pager"))
453 return git_config_string(&pager_program, var, value);
54adf370 454
ee9601e6
CC
455 if (!strcmp(var, "core.editor"))
456 return git_config_string(&editor_program, var, value);
4d87b9c5 457
dfb068be
CC
458 if (!strcmp(var, "core.excludesfile"))
459 return git_config_string(&excludes_file, var, value);
039bc64e 460
a9cc857a 461 if (!strcmp(var, "core.whitespace")) {
6c47d0e8
JH
462 if (!value)
463 return config_error_nonbool(var);
cf1b7869 464 whitespace_rule_cfg = parse_whitespace_rule(value);
a9cc857a
JH
465 return 0;
466 }
467
1ab661dd 468 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
469 return 0;
470}
471
4f629539 472int git_config_from_file(config_fn_t fn, const char *filename)
17712991
LT
473{
474 int ret;
4f629539 475 FILE *f = fopen(filename, "r");
17712991
LT
476
477 ret = -1;
478 if (f) {
479 config_file = f;
4f629539 480 config_file_name = filename;
17712991 481 config_linenr = 1;
02e5ba4a 482 config_file_eof = 0;
17712991
LT
483 ret = git_parse_file(fn);
484 fclose(f);
4f629539 485 config_file_name = NULL;
17712991
LT
486 }
487 return ret;
488}
10bea152 489
506b17b1
JS
490const char *git_etc_gitconfig(void)
491{
7f0e39fa
JS
492 static const char *system_wide;
493 if (!system_wide) {
494 system_wide = ETC_GITCONFIG;
495 if (!is_absolute_path(system_wide)) {
496 /* interpret path relative to exec-dir */
ef5b9d6e
JS
497 struct strbuf d = STRBUF_INIT;
498 strbuf_addf(&d, "%s/%s", git_exec_path(), system_wide);
499 system_wide = strbuf_detach(&d, NULL);
7f0e39fa
JS
500 }
501 }
502 return system_wide;
506b17b1
JS
503}
504
ab88c363
JK
505int git_env_bool(const char *k, int def)
506{
507 const char *v = getenv(k);
508 return v ? git_config_bool(k, v) : def;
509}
510
511int git_config_system(void)
512{
513 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
514}
515
516int git_config_global(void)
517{
518 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
519}
520
4f629539
JH
521int git_config(config_fn_t fn)
522{
5f1a63e0
JS
523 int ret = 0;
524 char *repo_config = NULL;
525 const char *home = NULL, *filename;
526
527 /* $GIT_CONFIG makes git read _only_ the given config file,
528 * $GIT_CONFIG_LOCAL will make it process it in addition to the
529 * global config file, the same way it would the per-repository
530 * config file otherwise. */
d4ebc36c 531 filename = getenv(CONFIG_ENVIRONMENT);
5f1a63e0 532 if (!filename) {
ab88c363 533 if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
506b17b1 534 ret += git_config_from_file(fn, git_etc_gitconfig());
5f1a63e0 535 home = getenv("HOME");
d4ebc36c 536 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
5f1a63e0 537 if (!filename)
9befac47 538 filename = repo_config = xstrdup(git_path("config"));
7f29f7a9 539 }
5f1a63e0 540
ab88c363 541 if (git_config_global() && home) {
9befac47 542 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
e33d0611 543 if (!access(user_config, R_OK))
5f1a63e0
JS
544 ret = git_config_from_file(fn, user_config);
545 free(user_config);
546 }
547
548 ret += git_config_from_file(fn, filename);
4cac42b1 549 free(repo_config);
5f1a63e0 550 return ret;
4f629539
JH
551}
552
10bea152
JS
553/*
554 * Find all the stuff for git_config_set() below.
555 */
4ddba79d
JS
556
557#define MAX_MATCHES 512
558
10bea152
JS
559static struct {
560 int baselen;
561 char* key;
f98d863d 562 int do_not_match;
10bea152 563 regex_t* value_regex;
4ddba79d 564 int multi_replace;
dc49cd76 565 size_t offset[MAX_MATCHES];
10bea152
JS
566 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
567 int seen;
568} store;
569
f98d863d
JS
570static int matches(const char* key, const char* value)
571{
572 return !strcmp(key, store.key) &&
573 (store.value_regex == NULL ||
574 (store.do_not_match ^
575 !regexec(store.value_regex, value, 0, NULL, 0)));
576}
577
10bea152
JS
578static int store_aux(const char* key, const char* value)
579{
ae9ee41d
JH
580 const char *ep;
581 size_t section_len;
582
10bea152
JS
583 switch (store.state) {
584 case KEY_SEEN:
f98d863d 585 if (matches(key, value)) {
4ddba79d 586 if (store.seen == 1 && store.multi_replace == 0) {
10bea152
JS
587 fprintf(stderr,
588 "Warning: %s has multiple values\n",
589 key);
4ddba79d
JS
590 } else if (store.seen >= MAX_MATCHES) {
591 fprintf(stderr, "Too many matches\n");
592 return 1;
10bea152 593 }
4ddba79d
JS
594
595 store.offset[store.seen] = ftell(config_file);
10bea152
JS
596 store.seen++;
597 }
598 break;
599 case SECTION_SEEN:
ae9ee41d
JH
600 /*
601 * What we are looking for is in store.key (both
602 * section and var), and its section part is baselen
603 * long. We found key (again, both section and var).
604 * We would want to know if this key is in the same
605 * section as what we are looking for. We already
606 * know we are in the same section as what should
607 * hold store.key.
608 */
609 ep = strrchr(key, '.');
610 section_len = ep - key;
611
612 if ((section_len != store.baselen) ||
613 memcmp(key, store.key, section_len+1)) {
10bea152
JS
614 store.state = SECTION_END_SEEN;
615 break;
ae9ee41d
JH
616 }
617
618 /*
619 * Do not increment matches: this is no match, but we
620 * just made sure we are in the desired section.
621 */
622 store.offset[store.seen] = ftell(config_file);
10bea152
JS
623 /* fallthru */
624 case SECTION_END_SEEN:
625 case START:
f98d863d 626 if (matches(key, value)) {
4ddba79d 627 store.offset[store.seen] = ftell(config_file);
10bea152
JS
628 store.state = KEY_SEEN;
629 store.seen++;
d14f7764
LT
630 } else {
631 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 632 !strncmp(key, store.key, store.baselen)) {
93ddef3e 633 store.state = SECTION_SEEN;
bdf0ef08 634 store.offset[store.seen] = ftell(config_file);
d14f7764 635 }
bdf0ef08 636 }
10bea152
JS
637 }
638 return 0;
639}
640
b79d18c9 641static int write_error(void)
480c9e52
AW
642{
643 fprintf(stderr, "Failed to write new configuration file\n");
644
645 /* Same error code as "failed to rename". */
646 return 4;
647}
648
649static int store_write_section(int fd, const char* key)
10bea152 650{
cb891a59
KH
651 const char *dot;
652 int i, success;
653 struct strbuf sb;
d14f7764 654
cb891a59
KH
655 strbuf_init(&sb, 0);
656 dot = memchr(key, '.', store.baselen);
d14f7764 657 if (dot) {
cb891a59
KH
658 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
659 for (i = dot - key + 1; i < store.baselen; i++) {
660 if (key[i] == '"')
661 strbuf_addch(&sb, '\\');
662 strbuf_addch(&sb, key[i]);
d14f7764 663 }
cb891a59
KH
664 strbuf_addstr(&sb, "\"]\n");
665 } else {
666 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
667 }
668
cb891a59
KH
669 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
670 strbuf_release(&sb);
480c9e52 671
cb891a59 672 return success;
10bea152
JS
673}
674
480c9e52 675static int store_write_pair(int fd, const char* key, const char* value)
10bea152 676{
cb891a59
KH
677 int i, success;
678 int length = strlen(key + store.baselen + 1);
679 const char *quote = "";
680 struct strbuf sb;
cdd4fb15 681
6281f394
JM
682 /*
683 * Check to see if the value needs to be surrounded with a dq pair.
684 * Note that problematic characters are always backslash-quoted; this
685 * check is about not losing leading or trailing SP and strings that
686 * follow beginning-of-comment characters (i.e. ';' and '#') by the
687 * configuration parser.
688 */
cdd4fb15 689 if (value[0] == ' ')
cb891a59 690 quote = "\"";
cdd4fb15
BG
691 for (i = 0; value[i]; i++)
692 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
693 quote = "\"";
694 if (i && value[i - 1] == ' ')
695 quote = "\"";
696
697 strbuf_init(&sb, 0);
698 strbuf_addf(&sb, "\t%.*s = %s",
699 length, key + store.baselen + 1, quote);
10bea152 700
10bea152
JS
701 for (i = 0; value[i]; i++)
702 switch (value[i]) {
480c9e52 703 case '\n':
cb891a59 704 strbuf_addstr(&sb, "\\n");
480c9e52
AW
705 break;
706 case '\t':
cb891a59 707 strbuf_addstr(&sb, "\\t");
480c9e52
AW
708 break;
709 case '"':
710 case '\\':
cb891a59 711 strbuf_addch(&sb, '\\');
480c9e52 712 default:
cb891a59 713 strbuf_addch(&sb, value[i]);
480c9e52
AW
714 break;
715 }
cb891a59
KH
716 strbuf_addf(&sb, "%s\n", quote);
717
718 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
719 strbuf_release(&sb);
720
721 return success;
10bea152
JS
722}
723
dc49cd76
SP
724static ssize_t find_beginning_of_line(const char* contents, size_t size,
725 size_t offset_, int* found_bracket)
4ddba79d 726{
dc49cd76
SP
727 size_t equal_offset = size, bracket_offset = size;
728 ssize_t offset;
4ddba79d 729
7a31cc0f 730contline:
a6080a0a 731 for (offset = offset_-2; offset > 0
4ddba79d
JS
732 && contents[offset] != '\n'; offset--)
733 switch (contents[offset]) {
734 case '=': equal_offset = offset; break;
735 case ']': bracket_offset = offset; break;
736 }
7a31cc0f
FL
737 if (offset > 0 && contents[offset-1] == '\\') {
738 offset_ = offset;
739 goto contline;
740 }
4ddba79d
JS
741 if (bracket_offset < equal_offset) {
742 *found_bracket = 1;
743 offset = bracket_offset+1;
744 } else
745 offset++;
746
747 return offset;
748}
749
10bea152
JS
750int git_config_set(const char* key, const char* value)
751{
4ddba79d 752 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
753}
754
755/*
756 * If value==NULL, unset in (remove from) config,
757 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
758 * if multi_replace==0, nothing, or only one matching key/value is replaced,
759 * else all matching key/values (regardless how many) are removed,
760 * before the new pair is written.
10bea152
JS
761 *
762 * Returns 0 on success.
763 *
764 * This function does this:
765 *
766 * - it locks the config file by creating ".git/config.lock"
767 *
768 * - it then parses the config using store_aux() as validator to find
769 * the position on the key/value pair to replace. If it is to be unset,
770 * it must be found exactly once.
771 *
772 * - the config file is mmap()ed and the part before the match (if any) is
773 * written to the lock file, then the changed part and the rest.
774 *
775 * - the config file is removed and the lock file rename()d to it.
776 *
777 */
778int git_config_set_multivar(const char* key, const char* value,
4ddba79d 779 const char* value_regex, int multi_replace)
10bea152 780{
d14f7764 781 int i, dot;
f8ba655e 782 int fd = -1, in_fd;
dafc88b1 783 int ret;
9c3796fc 784 char* config_filename;
6cbf973c 785 struct lock_file *lock = NULL;
b17e659d 786 const char* last_dot = strrchr(key, '.');
4ddba79d 787
d4ebc36c 788 config_filename = getenv(CONFIG_ENVIRONMENT);
9c3796fc 789 if (!config_filename) {
d4ebc36c 790 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
9c3796fc
JS
791 if (!config_filename)
792 config_filename = git_path("config");
793 }
9befac47 794 config_filename = xstrdup(config_filename);
9c3796fc 795
10bea152
JS
796 /*
797 * Since "key" actually contains the section name and the real
798 * key name separated by a dot, we have to know where the dot is.
799 */
b17e659d 800
dafc88b1 801 if (last_dot == NULL) {
10bea152 802 fprintf(stderr, "key does not contain a section: %s\n", key);
dafc88b1
SH
803 ret = 2;
804 goto out_free;
10bea152 805 }
b17e659d
JS
806 store.baselen = last_dot - key;
807
808 store.multi_replace = multi_replace;
10bea152
JS
809
810 /*
811 * Validate the key and while at it, lower case it for matching.
812 */
2d7320d0 813 store.key = xmalloc(strlen(key) + 1);
d14f7764
LT
814 dot = 0;
815 for (i = 0; key[i]; i++) {
816 unsigned char c = key[i];
817 if (c == '.')
818 dot = 1;
819 /* Leave the extended basename untouched.. */
820 if (!dot || i > store.baselen) {
38c5afa8 821 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
d14f7764
LT
822 fprintf(stderr, "invalid key: %s\n", key);
823 free(store.key);
824 ret = 1;
825 goto out_free;
826 }
827 c = tolower(c);
6f71686e
JS
828 } else if (c == '\n') {
829 fprintf(stderr, "invalid key (newline): %s\n", key);
830 free(store.key);
831 ret = 1;
832 goto out_free;
d14f7764
LT
833 }
834 store.key[i] = c;
835 }
3dd94e3b 836 store.key[i] = 0;
10bea152
JS
837
838 /*
6cbf973c 839 * The lock serves a purpose in addition to locking: the new
10bea152
JS
840 * contents of .git/config will be written into it.
841 */
6cbf973c
BS
842 lock = xcalloc(sizeof(struct lock_file), 1);
843 fd = hold_lock_file_for_update(lock, config_filename, 0);
844 if (fd < 0) {
10bea152
JS
845 fprintf(stderr, "could not lock config file\n");
846 free(store.key);
dafc88b1
SH
847 ret = -1;
848 goto out_free;
10bea152
JS
849 }
850
851 /*
852 * If .git/config does not exist yet, write a minimal version.
853 */
88fb958b
AR
854 in_fd = open(config_filename, O_RDONLY);
855 if ( in_fd < 0 ) {
10bea152
JS
856 free(store.key);
857
88fb958b
AR
858 if ( ENOENT != errno ) {
859 error("opening %s: %s", config_filename,
860 strerror(errno));
dafc88b1
SH
861 ret = 3; /* same as "invalid config file" */
862 goto out_free;
88fb958b 863 }
10bea152
JS
864 /* if nothing to unset, error out */
865 if (value == NULL) {
dafc88b1
SH
866 ret = 5;
867 goto out_free;
10bea152
JS
868 }
869
870 store.key = (char*)key;
480c9e52 871 if (!store_write_section(fd, key) ||
93c1e079
JH
872 !store_write_pair(fd, key, value))
873 goto write_err_out;
874 } else {
88fb958b 875 struct stat st;
10bea152 876 char* contents;
dc49cd76
SP
877 size_t contents_sz, copy_begin, copy_end;
878 int i, new_line = 0;
10bea152
JS
879
880 if (value_regex == NULL)
881 store.value_regex = NULL;
882 else {
f98d863d
JS
883 if (value_regex[0] == '!') {
884 store.do_not_match = 1;
885 value_regex++;
886 } else
887 store.do_not_match = 0;
888
2d7320d0 889 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
890 if (regcomp(store.value_regex, value_regex,
891 REG_EXTENDED)) {
7246ed43 892 fprintf(stderr, "Invalid pattern: %s\n",
10bea152
JS
893 value_regex);
894 free(store.value_regex);
dafc88b1
SH
895 ret = 6;
896 goto out_free;
10bea152
JS
897 }
898 }
899
4ddba79d 900 store.offset[0] = 0;
10bea152
JS
901 store.state = START;
902 store.seen = 0;
903
904 /*
905 * After this, store.offset will contain the *end* offset
906 * of the last match, or remain at 0 if no match was found.
907 * As a side effect, we make sure to transform only a valid
908 * existing config file.
909 */
9c3796fc 910 if (git_config_from_file(store_aux, config_filename)) {
10bea152
JS
911 fprintf(stderr, "invalid config file\n");
912 free(store.key);
913 if (store.value_regex != NULL) {
914 regfree(store.value_regex);
915 free(store.value_regex);
916 }
dafc88b1
SH
917 ret = 3;
918 goto out_free;
10bea152
JS
919 }
920
921 free(store.key);
922 if (store.value_regex != NULL) {
923 regfree(store.value_regex);
924 free(store.value_regex);
925 }
926
4ddba79d
JS
927 /* if nothing to unset, or too many matches, error out */
928 if ((store.seen == 0 && value == NULL) ||
929 (store.seen > 1 && multi_replace == 0)) {
dafc88b1
SH
930 ret = 5;
931 goto out_free;
10bea152
JS
932 }
933
88fb958b 934 fstat(in_fd, &st);
dc49cd76
SP
935 contents_sz = xsize_t(st.st_size);
936 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
937 MAP_PRIVATE, in_fd, 0);
938 close(in_fd);
939
4ddba79d
JS
940 if (store.seen == 0)
941 store.seen = 1;
942
943 for (i = 0, copy_begin = 0; i < store.seen; i++) {
944 if (store.offset[i] == 0) {
dc49cd76 945 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
946 } else if (store.state != KEY_SEEN) {
947 copy_end = store.offset[i];
10bea152 948 } else
4ddba79d 949 copy_end = find_beginning_of_line(
dc49cd76 950 contents, contents_sz,
4ddba79d
JS
951 store.offset[i]-2, &new_line);
952
02e5ba4a
JK
953 if (copy_end > 0 && contents[copy_end-1] != '\n')
954 new_line = 1;
955
4ddba79d
JS
956 /* write the first part of the config */
957 if (copy_end > copy_begin) {
93c1e079
JH
958 if (write_in_full(fd, contents + copy_begin,
959 copy_end - copy_begin) <
960 copy_end - copy_begin)
961 goto write_err_out;
962 if (new_line &&
963 write_in_full(fd, "\n", 1) != 1)
964 goto write_err_out;
4ddba79d
JS
965 }
966 copy_begin = store.offset[i];
10bea152
JS
967 }
968
10bea152
JS
969 /* write the pair (value == NULL means unset) */
970 if (value != NULL) {
93c1e079
JH
971 if (store.state == START) {
972 if (!store_write_section(fd, key))
973 goto write_err_out;
480c9e52 974 }
93c1e079
JH
975 if (!store_write_pair(fd, key, value))
976 goto write_err_out;
10bea152
JS
977 }
978
979 /* write the rest of the config */
dc49cd76 980 if (copy_begin < contents_sz)
93c1e079 981 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
982 contents_sz - copy_begin) <
983 contents_sz - copy_begin)
93c1e079 984 goto write_err_out;
10bea152 985
dc49cd76 986 munmap(contents, contents_sz);
10bea152
JS
987 }
988
4ed7cd3a 989 if (commit_lock_file(lock) < 0) {
6cbf973c 990 fprintf(stderr, "Cannot commit config file!\n");
dafc88b1
SH
991 ret = 4;
992 goto out_free;
10bea152
JS
993 }
994
6cbf973c
BS
995 /*
996 * lock is committed, so don't try to roll it back below.
997 * NOTE: Since lockfile.c keeps a linked list of all created
998 * lock_file structures, it isn't safe to free(lock). It's
999 * better to just leave it hanging around.
1000 */
1001 lock = NULL;
dafc88b1
SH
1002 ret = 0;
1003
1004out_free:
6cbf973c
BS
1005 if (lock)
1006 rollback_lock_file(lock);
4cac42b1 1007 free(config_filename);
dafc88b1 1008 return ret;
93c1e079
JH
1009
1010write_err_out:
1011 ret = write_error();
1012 goto out_free;
1013
10bea152
JS
1014}
1015
118f8b24
PB
1016static int section_name_match (const char *buf, const char *name)
1017{
1018 int i = 0, j = 0, dot = 0;
1019 for (; buf[i] && buf[i] != ']'; i++) {
1020 if (!dot && isspace(buf[i])) {
1021 dot = 1;
1022 if (name[j++] != '.')
1023 break;
1024 for (i++; isspace(buf[i]); i++)
1025 ; /* do nothing */
1026 if (buf[i] != '"')
1027 break;
1028 continue;
1029 }
1030 if (buf[i] == '\\' && dot)
1031 i++;
1032 else if (buf[i] == '"' && dot) {
1033 for (i++; isspace(buf[i]); i++)
1034 ; /* do_nothing */
1035 break;
1036 }
1037 if (buf[i] != name[j++])
1038 break;
1039 }
1040 return (buf[i] == ']' && name[j] == 0);
1041}
1042
1043/* if new_name == NULL, the section is removed instead */
0667fcfb
JS
1044int git_config_rename_section(const char *old_name, const char *new_name)
1045{
118f8b24 1046 int ret = 0, remove = 0;
fc1905bb 1047 char *config_filename;
0667fcfb
JS
1048 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1049 int out_fd;
1050 char buf[1024];
1051
d4ebc36c 1052 config_filename = getenv(CONFIG_ENVIRONMENT);
0667fcfb 1053 if (!config_filename) {
d4ebc36c 1054 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
0667fcfb
JS
1055 if (!config_filename)
1056 config_filename = git_path("config");
1057 }
1058 config_filename = xstrdup(config_filename);
1059 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb
JH
1060 if (out_fd < 0) {
1061 ret = error("Could not lock config file!");
1062 goto out;
1063 }
0667fcfb 1064
fc1905bb 1065 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
1066 /* no config file means nothing to rename, no error */
1067 goto unlock_and_out;
fc1905bb 1068 }
0667fcfb
JS
1069
1070 while (fgets(buf, sizeof(buf), config_file)) {
1071 int i;
480c9e52 1072 int length;
0667fcfb
JS
1073 for (i = 0; buf[i] && isspace(buf[i]); i++)
1074 ; /* do nothing */
1075 if (buf[i] == '[') {
1076 /* it's a section */
118f8b24
PB
1077 if (section_name_match (&buf[i+1], old_name)) {
1078 ret++;
1079 if (new_name == NULL) {
1080 remove = 1;
0667fcfb
JS
1081 continue;
1082 }
0667fcfb 1083 store.baselen = strlen(new_name);
480c9e52
AW
1084 if (!store_write_section(out_fd, new_name)) {
1085 ret = write_error();
1086 goto out;
1087 }
0667fcfb
JS
1088 continue;
1089 }
118f8b24 1090 remove = 0;
0667fcfb 1091 }
118f8b24
PB
1092 if (remove)
1093 continue;
480c9e52
AW
1094 length = strlen(buf);
1095 if (write_in_full(out_fd, buf, length) != length) {
1096 ret = write_error();
1097 goto out;
1098 }
0667fcfb 1099 }
fc1905bb 1100 fclose(config_file);
01ebb9dc 1101 unlock_and_out:
4ed7cd3a 1102 if (commit_lock_file(lock) < 0)
480c9e52 1103 ret = error("Cannot commit config file!");
fc1905bb
JH
1104 out:
1105 free(config_filename);
0667fcfb
JS
1106 return ret;
1107}
40ea4ed9
JH
1108
1109/*
1110 * Call this to report error for your variable that should not
1111 * get a boolean value (i.e. "[my] var" means "true").
1112 */
1113int config_error_nonbool(const char *var)
1114{
1115 return error("Missing value for '%s'", var);
1116}