85f956058c59e05b4aafb71d05c54e47cd07f39f
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
13 #define MAXNAME (256)
15 static FILE *config_file;
16 static const char *config_file_name;
17 static int config_linenr;
18 static int config_file_eof;
19 static int zlib_compression_seen;
21 const char *config_exclusive_filename = NULL;
23 struct config_item
24 {
25 struct config_item *next;
26 char *name;
27 char *value;
28 };
29 static struct config_item *config_parameters;
30 static struct config_item **config_parameters_tail = &config_parameters;
32 static void lowercase(char *p)
33 {
34 for (; *p; p++)
35 *p = tolower(*p);
36 }
38 void git_config_push_parameter(const char *text)
39 {
40 struct strbuf env = STRBUF_INIT;
41 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
42 if (old) {
43 strbuf_addstr(&env, old);
44 strbuf_addch(&env, ' ');
45 }
46 sq_quote_buf(&env, text);
47 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
48 strbuf_release(&env);
49 }
51 int git_config_parse_parameter(const char *text)
52 {
53 struct config_item *ct;
54 struct strbuf tmp = STRBUF_INIT;
55 struct strbuf **pair;
56 strbuf_addstr(&tmp, text);
57 pair = strbuf_split(&tmp, '=');
58 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
59 strbuf_setlen(pair[0], pair[0]->len - 1);
60 strbuf_trim(pair[0]);
61 if (!pair[0]->len) {
62 strbuf_list_free(pair);
63 return -1;
64 }
65 ct = xcalloc(1, sizeof(struct config_item));
66 ct->name = strbuf_detach(pair[0], NULL);
67 if (pair[1]) {
68 strbuf_trim(pair[1]);
69 ct->value = strbuf_detach(pair[1], NULL);
70 }
71 strbuf_list_free(pair);
72 lowercase(ct->name);
73 *config_parameters_tail = ct;
74 config_parameters_tail = &ct->next;
75 return 0;
76 }
78 int git_config_parse_environment(void) {
79 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
80 char *envw;
81 const char **argv = NULL;
82 int nr = 0, alloc = 0;
83 int i;
85 if (!env)
86 return 0;
87 /* sq_dequote will write over it */
88 envw = xstrdup(env);
90 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
91 free(envw);
92 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
93 }
95 for (i = 0; i < nr; i++) {
96 if (git_config_parse_parameter(argv[i]) < 0) {
97 error("bogus config parameter: %s", argv[i]);
98 free(argv);
99 free(envw);
100 return -1;
101 }
102 }
104 free(argv);
105 free(envw);
106 return 0;
107 }
109 static int get_next_char(void)
110 {
111 int c;
112 FILE *f;
114 c = '\n';
115 if ((f = config_file) != NULL) {
116 c = fgetc(f);
117 if (c == '\r') {
118 /* DOS like systems */
119 c = fgetc(f);
120 if (c != '\n') {
121 ungetc(c, f);
122 c = '\r';
123 }
124 }
125 if (c == '\n')
126 config_linenr++;
127 if (c == EOF) {
128 config_file_eof = 1;
129 c = '\n';
130 }
131 }
132 return c;
133 }
135 static char *parse_value(void)
136 {
137 static char value[1024];
138 int quote = 0, comment = 0, len = 0, space = 0;
140 for (;;) {
141 int c = get_next_char();
142 if (len >= sizeof(value) - 1)
143 return NULL;
144 if (c == '\n') {
145 if (quote)
146 return NULL;
147 value[len] = 0;
148 return value;
149 }
150 if (comment)
151 continue;
152 if (isspace(c) && !quote) {
153 if (len)
154 space++;
155 continue;
156 }
157 if (!quote) {
158 if (c == ';' || c == '#') {
159 comment = 1;
160 continue;
161 }
162 }
163 for (; space; space--)
164 value[len++] = ' ';
165 if (c == '\\') {
166 c = get_next_char();
167 switch (c) {
168 case '\n':
169 continue;
170 case 't':
171 c = '\t';
172 break;
173 case 'b':
174 c = '\b';
175 break;
176 case 'n':
177 c = '\n';
178 break;
179 /* Some characters escape as themselves */
180 case '\\': case '"':
181 break;
182 /* Reject unknown escape sequences */
183 default:
184 return NULL;
185 }
186 value[len++] = c;
187 continue;
188 }
189 if (c == '"') {
190 quote = 1-quote;
191 continue;
192 }
193 value[len++] = c;
194 }
195 }
197 static inline int iskeychar(int c)
198 {
199 return isalnum(c) || c == '-';
200 }
202 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
203 {
204 int c;
205 char *value;
207 /* Get the full name */
208 for (;;) {
209 c = get_next_char();
210 if (config_file_eof)
211 break;
212 if (!iskeychar(c))
213 break;
214 name[len++] = tolower(c);
215 if (len >= MAXNAME)
216 return -1;
217 }
218 name[len] = 0;
219 while (c == ' ' || c == '\t')
220 c = get_next_char();
222 value = NULL;
223 if (c != '\n') {
224 if (c != '=')
225 return -1;
226 value = parse_value();
227 if (!value)
228 return -1;
229 }
230 return fn(name, value, data);
231 }
233 static int get_extended_base_var(char *name, int baselen, int c)
234 {
235 do {
236 if (c == '\n')
237 return -1;
238 c = get_next_char();
239 } while (isspace(c));
241 /* We require the format to be '[base "extension"]' */
242 if (c != '"')
243 return -1;
244 name[baselen++] = '.';
246 for (;;) {
247 int c = get_next_char();
248 if (c == '\n')
249 return -1;
250 if (c == '"')
251 break;
252 if (c == '\\') {
253 c = get_next_char();
254 if (c == '\n')
255 return -1;
256 }
257 name[baselen++] = c;
258 if (baselen > MAXNAME / 2)
259 return -1;
260 }
262 /* Final ']' */
263 if (get_next_char() != ']')
264 return -1;
265 return baselen;
266 }
268 static int get_base_var(char *name)
269 {
270 int baselen = 0;
272 for (;;) {
273 int c = get_next_char();
274 if (config_file_eof)
275 return -1;
276 if (c == ']')
277 return baselen;
278 if (isspace(c))
279 return get_extended_base_var(name, baselen, c);
280 if (!iskeychar(c) && c != '.')
281 return -1;
282 if (baselen > MAXNAME / 2)
283 return -1;
284 name[baselen++] = tolower(c);
285 }
286 }
288 static int git_parse_file(config_fn_t fn, void *data)
289 {
290 int comment = 0;
291 int baselen = 0;
292 static char var[MAXNAME];
294 /* U+FEFF Byte Order Mark in UTF8 */
295 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
296 const unsigned char *bomptr = utf8_bom;
298 for (;;) {
299 int c = get_next_char();
300 if (bomptr && *bomptr) {
301 /* We are at the file beginning; skip UTF8-encoded BOM
302 * if present. Sane editors won't put this in on their
303 * own, but e.g. Windows Notepad will do it happily. */
304 if ((unsigned char) c == *bomptr) {
305 bomptr++;
306 continue;
307 } else {
308 /* Do not tolerate partial BOM. */
309 if (bomptr != utf8_bom)
310 break;
311 /* No BOM at file beginning. Cool. */
312 bomptr = NULL;
313 }
314 }
315 if (c == '\n') {
316 if (config_file_eof)
317 return 0;
318 comment = 0;
319 continue;
320 }
321 if (comment || isspace(c))
322 continue;
323 if (c == '#' || c == ';') {
324 comment = 1;
325 continue;
326 }
327 if (c == '[') {
328 baselen = get_base_var(var);
329 if (baselen <= 0)
330 break;
331 var[baselen++] = '.';
332 var[baselen] = 0;
333 continue;
334 }
335 if (!isalpha(c))
336 break;
337 var[baselen] = tolower(c);
338 if (get_value(fn, data, var, baselen+1) < 0)
339 break;
340 }
341 die("bad config file line %d in %s", config_linenr, config_file_name);
342 }
344 static int parse_unit_factor(const char *end, unsigned long *val)
345 {
346 if (!*end)
347 return 1;
348 else if (!strcasecmp(end, "k")) {
349 *val *= 1024;
350 return 1;
351 }
352 else if (!strcasecmp(end, "m")) {
353 *val *= 1024 * 1024;
354 return 1;
355 }
356 else if (!strcasecmp(end, "g")) {
357 *val *= 1024 * 1024 * 1024;
358 return 1;
359 }
360 return 0;
361 }
363 static int git_parse_long(const char *value, long *ret)
364 {
365 if (value && *value) {
366 char *end;
367 long val = strtol(value, &end, 0);
368 unsigned long factor = 1;
369 if (!parse_unit_factor(end, &factor))
370 return 0;
371 *ret = val * factor;
372 return 1;
373 }
374 return 0;
375 }
377 int git_parse_ulong(const char *value, unsigned long *ret)
378 {
379 if (value && *value) {
380 char *end;
381 unsigned long val = strtoul(value, &end, 0);
382 if (!parse_unit_factor(end, &val))
383 return 0;
384 *ret = val;
385 return 1;
386 }
387 return 0;
388 }
390 static void die_bad_config(const char *name)
391 {
392 if (config_file_name)
393 die("bad config value for '%s' in %s", name, config_file_name);
394 die("bad config value for '%s'", name);
395 }
397 int git_config_int(const char *name, const char *value)
398 {
399 long ret = 0;
400 if (!git_parse_long(value, &ret))
401 die_bad_config(name);
402 return ret;
403 }
405 unsigned long git_config_ulong(const char *name, const char *value)
406 {
407 unsigned long ret;
408 if (!git_parse_ulong(value, &ret))
409 die_bad_config(name);
410 return ret;
411 }
413 static int git_config_maybe_bool_text(const char *name, const char *value)
414 {
415 if (!value)
416 return 1;
417 if (!*value)
418 return 0;
419 if (!strcasecmp(value, "true")
420 || !strcasecmp(value, "yes")
421 || !strcasecmp(value, "on"))
422 return 1;
423 if (!strcasecmp(value, "false")
424 || !strcasecmp(value, "no")
425 || !strcasecmp(value, "off"))
426 return 0;
427 return -1;
428 }
430 int git_config_maybe_bool(const char *name, const char *value)
431 {
432 long v = git_config_maybe_bool_text(name, value);
433 if (0 <= v)
434 return v;
435 if (git_parse_long(value, &v))
436 return !!v;
437 return -1;
438 }
440 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
441 {
442 int v = git_config_maybe_bool_text(name, value);
443 if (0 <= v) {
444 *is_bool = 1;
445 return v;
446 }
447 *is_bool = 0;
448 return git_config_int(name, value);
449 }
451 int git_config_bool(const char *name, const char *value)
452 {
453 int discard;
454 return !!git_config_bool_or_int(name, value, &discard);
455 }
457 int git_config_string(const char **dest, const char *var, const char *value)
458 {
459 if (!value)
460 return config_error_nonbool(var);
461 *dest = xstrdup(value);
462 return 0;
463 }
465 int git_config_pathname(const char **dest, const char *var, const char *value)
466 {
467 if (!value)
468 return config_error_nonbool(var);
469 *dest = expand_user_path(value);
470 if (!*dest)
471 die("Failed to expand user dir in: '%s'", value);
472 return 0;
473 }
475 static int git_default_core_config(const char *var, const char *value)
476 {
477 /* This needs a better name */
478 if (!strcmp(var, "core.filemode")) {
479 trust_executable_bit = git_config_bool(var, value);
480 return 0;
481 }
482 if (!strcmp(var, "core.trustctime")) {
483 trust_ctime = git_config_bool(var, value);
484 return 0;
485 }
487 if (!strcmp(var, "core.quotepath")) {
488 quote_path_fully = git_config_bool(var, value);
489 return 0;
490 }
492 if (!strcmp(var, "core.symlinks")) {
493 has_symlinks = git_config_bool(var, value);
494 return 0;
495 }
497 if (!strcmp(var, "core.ignorecase")) {
498 ignore_case = git_config_bool(var, value);
499 return 0;
500 }
502 if (!strcmp(var, "core.abbrevguard")) {
503 unique_abbrev_extra_length = git_config_int(var, value);
504 if (unique_abbrev_extra_length < 0)
505 unique_abbrev_extra_length = 0;
506 return 0;
507 }
509 if (!strcmp(var, "core.bare")) {
510 is_bare_repository_cfg = git_config_bool(var, value);
511 return 0;
512 }
514 if (!strcmp(var, "core.ignorestat")) {
515 assume_unchanged = git_config_bool(var, value);
516 return 0;
517 }
519 if (!strcmp(var, "core.prefersymlinkrefs")) {
520 prefer_symlink_refs = git_config_bool(var, value);
521 return 0;
522 }
524 if (!strcmp(var, "core.logallrefupdates")) {
525 log_all_ref_updates = git_config_bool(var, value);
526 return 0;
527 }
529 if (!strcmp(var, "core.warnambiguousrefs")) {
530 warn_ambiguous_refs = git_config_bool(var, value);
531 return 0;
532 }
534 if (!strcmp(var, "core.loosecompression")) {
535 int level = git_config_int(var, value);
536 if (level == -1)
537 level = Z_DEFAULT_COMPRESSION;
538 else if (level < 0 || level > Z_BEST_COMPRESSION)
539 die("bad zlib compression level %d", level);
540 zlib_compression_level = level;
541 zlib_compression_seen = 1;
542 return 0;
543 }
545 if (!strcmp(var, "core.compression")) {
546 int level = git_config_int(var, value);
547 if (level == -1)
548 level = Z_DEFAULT_COMPRESSION;
549 else if (level < 0 || level > Z_BEST_COMPRESSION)
550 die("bad zlib compression level %d", level);
551 core_compression_level = level;
552 core_compression_seen = 1;
553 if (!zlib_compression_seen)
554 zlib_compression_level = level;
555 return 0;
556 }
558 if (!strcmp(var, "core.packedgitwindowsize")) {
559 int pgsz_x2 = getpagesize() * 2;
560 packed_git_window_size = git_config_int(var, value);
562 /* This value must be multiple of (pagesize * 2) */
563 packed_git_window_size /= pgsz_x2;
564 if (packed_git_window_size < 1)
565 packed_git_window_size = 1;
566 packed_git_window_size *= pgsz_x2;
567 return 0;
568 }
570 if (!strcmp(var, "core.bigfilethreshold")) {
571 long n = git_config_int(var, value);
572 big_file_threshold = 0 < n ? n : 0;
573 return 0;
574 }
576 if (!strcmp(var, "core.packedgitlimit")) {
577 packed_git_limit = git_config_int(var, value);
578 return 0;
579 }
581 if (!strcmp(var, "core.deltabasecachelimit")) {
582 delta_base_cache_limit = git_config_int(var, value);
583 return 0;
584 }
586 if (!strcmp(var, "core.autocrlf")) {
587 if (value && !strcasecmp(value, "input")) {
588 if (eol == EOL_CRLF)
589 return error("core.autocrlf=input conflicts with core.eol=crlf");
590 auto_crlf = AUTO_CRLF_INPUT;
591 return 0;
592 }
593 auto_crlf = git_config_bool(var, value);
594 return 0;
595 }
597 if (!strcmp(var, "core.safecrlf")) {
598 if (value && !strcasecmp(value, "warn")) {
599 safe_crlf = SAFE_CRLF_WARN;
600 return 0;
601 }
602 safe_crlf = git_config_bool(var, value);
603 return 0;
604 }
606 if (!strcmp(var, "core.eol")) {
607 if (value && !strcasecmp(value, "lf"))
608 eol = EOL_LF;
609 else if (value && !strcasecmp(value, "crlf"))
610 eol = EOL_CRLF;
611 else if (value && !strcasecmp(value, "native"))
612 eol = EOL_NATIVE;
613 else
614 eol = EOL_UNSET;
615 if (eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
616 return error("core.autocrlf=input conflicts with core.eol=crlf");
617 return 0;
618 }
620 if (!strcmp(var, "core.notesref")) {
621 notes_ref_name = xstrdup(value);
622 return 0;
623 }
625 if (!strcmp(var, "core.pager"))
626 return git_config_string(&pager_program, var, value);
628 if (!strcmp(var, "core.editor"))
629 return git_config_string(&editor_program, var, value);
631 if (!strcmp(var, "core.askpass"))
632 return git_config_string(&askpass_program, var, value);
634 if (!strcmp(var, "core.excludesfile"))
635 return git_config_pathname(&excludes_file, var, value);
637 if (!strcmp(var, "core.whitespace")) {
638 if (!value)
639 return config_error_nonbool(var);
640 whitespace_rule_cfg = parse_whitespace_rule(value);
641 return 0;
642 }
644 if (!strcmp(var, "core.fsyncobjectfiles")) {
645 fsync_object_files = git_config_bool(var, value);
646 return 0;
647 }
649 if (!strcmp(var, "core.preloadindex")) {
650 core_preload_index = git_config_bool(var, value);
651 return 0;
652 }
654 if (!strcmp(var, "core.createobject")) {
655 if (!strcmp(value, "rename"))
656 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
657 else if (!strcmp(value, "link"))
658 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
659 else
660 die("Invalid mode for object creation: %s", value);
661 return 0;
662 }
664 if (!strcmp(var, "core.sparsecheckout")) {
665 core_apply_sparse_checkout = git_config_bool(var, value);
666 return 0;
667 }
669 /* Add other config variables here and to Documentation/config.txt. */
670 return 0;
671 }
673 static int git_default_user_config(const char *var, const char *value)
674 {
675 if (!strcmp(var, "user.name")) {
676 if (!value)
677 return config_error_nonbool(var);
678 strlcpy(git_default_name, value, sizeof(git_default_name));
679 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
680 return 0;
681 }
683 if (!strcmp(var, "user.email")) {
684 if (!value)
685 return config_error_nonbool(var);
686 strlcpy(git_default_email, value, sizeof(git_default_email));
687 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
688 return 0;
689 }
691 /* Add other config variables here and to Documentation/config.txt. */
692 return 0;
693 }
695 static int git_default_i18n_config(const char *var, const char *value)
696 {
697 if (!strcmp(var, "i18n.commitencoding"))
698 return git_config_string(&git_commit_encoding, var, value);
700 if (!strcmp(var, "i18n.logoutputencoding"))
701 return git_config_string(&git_log_output_encoding, var, value);
703 /* Add other config variables here and to Documentation/config.txt. */
704 return 0;
705 }
707 static int git_default_branch_config(const char *var, const char *value)
708 {
709 if (!strcmp(var, "branch.autosetupmerge")) {
710 if (value && !strcasecmp(value, "always")) {
711 git_branch_track = BRANCH_TRACK_ALWAYS;
712 return 0;
713 }
714 git_branch_track = git_config_bool(var, value);
715 return 0;
716 }
717 if (!strcmp(var, "branch.autosetuprebase")) {
718 if (!value)
719 return config_error_nonbool(var);
720 else if (!strcmp(value, "never"))
721 autorebase = AUTOREBASE_NEVER;
722 else if (!strcmp(value, "local"))
723 autorebase = AUTOREBASE_LOCAL;
724 else if (!strcmp(value, "remote"))
725 autorebase = AUTOREBASE_REMOTE;
726 else if (!strcmp(value, "always"))
727 autorebase = AUTOREBASE_ALWAYS;
728 else
729 return error("Malformed value for %s", var);
730 return 0;
731 }
733 /* Add other config variables here and to Documentation/config.txt. */
734 return 0;
735 }
737 static int git_default_push_config(const char *var, const char *value)
738 {
739 if (!strcmp(var, "push.default")) {
740 if (!value)
741 return config_error_nonbool(var);
742 else if (!strcmp(value, "nothing"))
743 push_default = PUSH_DEFAULT_NOTHING;
744 else if (!strcmp(value, "matching"))
745 push_default = PUSH_DEFAULT_MATCHING;
746 else if (!strcmp(value, "tracking"))
747 push_default = PUSH_DEFAULT_TRACKING;
748 else if (!strcmp(value, "current"))
749 push_default = PUSH_DEFAULT_CURRENT;
750 else {
751 error("Malformed value for %s: %s", var, value);
752 return error("Must be one of nothing, matching, "
753 "tracking or current.");
754 }
755 return 0;
756 }
758 /* Add other config variables here and to Documentation/config.txt. */
759 return 0;
760 }
762 static int git_default_mailmap_config(const char *var, const char *value)
763 {
764 if (!strcmp(var, "mailmap.file"))
765 return git_config_string(&git_mailmap_file, var, value);
767 /* Add other config variables here and to Documentation/config.txt. */
768 return 0;
769 }
771 int git_default_config(const char *var, const char *value, void *dummy)
772 {
773 if (!prefixcmp(var, "core."))
774 return git_default_core_config(var, value);
776 if (!prefixcmp(var, "user."))
777 return git_default_user_config(var, value);
779 if (!prefixcmp(var, "i18n."))
780 return git_default_i18n_config(var, value);
782 if (!prefixcmp(var, "branch."))
783 return git_default_branch_config(var, value);
785 if (!prefixcmp(var, "push."))
786 return git_default_push_config(var, value);
788 if (!prefixcmp(var, "mailmap."))
789 return git_default_mailmap_config(var, value);
791 if (!prefixcmp(var, "advice."))
792 return git_default_advice_config(var, value);
794 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
795 pager_use_color = git_config_bool(var,value);
796 return 0;
797 }
799 /* Add other config variables here and to Documentation/config.txt. */
800 return 0;
801 }
803 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
804 {
805 int ret;
806 FILE *f = fopen(filename, "r");
808 ret = -1;
809 if (f) {
810 config_file = f;
811 config_file_name = filename;
812 config_linenr = 1;
813 config_file_eof = 0;
814 ret = git_parse_file(fn, data);
815 fclose(f);
816 config_file_name = NULL;
817 }
818 return ret;
819 }
821 const char *git_etc_gitconfig(void)
822 {
823 static const char *system_wide;
824 if (!system_wide)
825 system_wide = system_path(ETC_GITCONFIG);
826 return system_wide;
827 }
829 int git_env_bool(const char *k, int def)
830 {
831 const char *v = getenv(k);
832 return v ? git_config_bool(k, v) : def;
833 }
835 int git_config_system(void)
836 {
837 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
838 }
840 int git_config_global(void)
841 {
842 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
843 }
845 int git_config_from_parameters(config_fn_t fn, void *data)
846 {
847 static int loaded_environment;
848 const struct config_item *ct;
850 if (!loaded_environment) {
851 if (git_config_parse_environment() < 0)
852 return -1;
853 loaded_environment = 1;
854 }
855 for (ct = config_parameters; ct; ct = ct->next)
856 if (fn(ct->name, ct->value, data) < 0)
857 return -1;
858 return 0;
859 }
861 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
862 {
863 int ret = 0, found = 0;
864 const char *home = NULL;
866 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
867 if (config_exclusive_filename)
868 return git_config_from_file(fn, config_exclusive_filename, data);
869 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
870 ret += git_config_from_file(fn, git_etc_gitconfig(),
871 data);
872 found += 1;
873 }
875 home = getenv("HOME");
876 if (git_config_global() && home) {
877 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
878 if (!access(user_config, R_OK)) {
879 ret += git_config_from_file(fn, user_config, data);
880 found += 1;
881 }
882 free(user_config);
883 }
885 if (repo_config && !access(repo_config, R_OK)) {
886 ret += git_config_from_file(fn, repo_config, data);
887 found += 1;
888 }
890 ret += git_config_from_parameters(fn, data);
891 if (config_parameters)
892 found += 1;
894 return ret == 0 ? found : ret;
895 }
897 int git_config(config_fn_t fn, void *data)
898 {
899 char *repo_config = NULL;
900 int ret;
902 repo_config = git_pathdup("config");
903 ret = git_config_early(fn, data, repo_config);
904 if (repo_config)
905 free(repo_config);
906 return ret;
907 }
909 /*
910 * Find all the stuff for git_config_set() below.
911 */
913 #define MAX_MATCHES 512
915 static struct {
916 int baselen;
917 char *key;
918 int do_not_match;
919 regex_t *value_regex;
920 int multi_replace;
921 size_t offset[MAX_MATCHES];
922 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
923 int seen;
924 } store;
926 static int matches(const char *key, const char *value)
927 {
928 return !strcmp(key, store.key) &&
929 (store.value_regex == NULL ||
930 (store.do_not_match ^
931 !regexec(store.value_regex, value, 0, NULL, 0)));
932 }
934 static int store_aux(const char *key, const char *value, void *cb)
935 {
936 const char *ep;
937 size_t section_len;
939 switch (store.state) {
940 case KEY_SEEN:
941 if (matches(key, value)) {
942 if (store.seen == 1 && store.multi_replace == 0) {
943 warning("%s has multiple values", key);
944 } else if (store.seen >= MAX_MATCHES) {
945 error("too many matches for %s", key);
946 return 1;
947 }
949 store.offset[store.seen] = ftell(config_file);
950 store.seen++;
951 }
952 break;
953 case SECTION_SEEN:
954 /*
955 * What we are looking for is in store.key (both
956 * section and var), and its section part is baselen
957 * long. We found key (again, both section and var).
958 * We would want to know if this key is in the same
959 * section as what we are looking for. We already
960 * know we are in the same section as what should
961 * hold store.key.
962 */
963 ep = strrchr(key, '.');
964 section_len = ep - key;
966 if ((section_len != store.baselen) ||
967 memcmp(key, store.key, section_len+1)) {
968 store.state = SECTION_END_SEEN;
969 break;
970 }
972 /*
973 * Do not increment matches: this is no match, but we
974 * just made sure we are in the desired section.
975 */
976 store.offset[store.seen] = ftell(config_file);
977 /* fallthru */
978 case SECTION_END_SEEN:
979 case START:
980 if (matches(key, value)) {
981 store.offset[store.seen] = ftell(config_file);
982 store.state = KEY_SEEN;
983 store.seen++;
984 } else {
985 if (strrchr(key, '.') - key == store.baselen &&
986 !strncmp(key, store.key, store.baselen)) {
987 store.state = SECTION_SEEN;
988 store.offset[store.seen] = ftell(config_file);
989 }
990 }
991 }
992 return 0;
993 }
995 static int write_error(const char *filename)
996 {
997 error("failed to write new configuration file %s", filename);
999 /* Same error code as "failed to rename". */
1000 return 4;
1001 }
1003 static int store_write_section(int fd, const char *key)
1004 {
1005 const char *dot;
1006 int i, success;
1007 struct strbuf sb = STRBUF_INIT;
1009 dot = memchr(key, '.', store.baselen);
1010 if (dot) {
1011 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1012 for (i = dot - key + 1; i < store.baselen; i++) {
1013 if (key[i] == '"' || key[i] == '\\')
1014 strbuf_addch(&sb, '\\');
1015 strbuf_addch(&sb, key[i]);
1016 }
1017 strbuf_addstr(&sb, "\"]\n");
1018 } else {
1019 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1020 }
1022 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1023 strbuf_release(&sb);
1025 return success;
1026 }
1028 static int store_write_pair(int fd, const char *key, const char *value)
1029 {
1030 int i, success;
1031 int length = strlen(key + store.baselen + 1);
1032 const char *quote = "";
1033 struct strbuf sb = STRBUF_INIT;
1035 /*
1036 * Check to see if the value needs to be surrounded with a dq pair.
1037 * Note that problematic characters are always backslash-quoted; this
1038 * check is about not losing leading or trailing SP and strings that
1039 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1040 * configuration parser.
1041 */
1042 if (value[0] == ' ')
1043 quote = "\"";
1044 for (i = 0; value[i]; i++)
1045 if (value[i] == ';' || value[i] == '#')
1046 quote = "\"";
1047 if (i && value[i - 1] == ' ')
1048 quote = "\"";
1050 strbuf_addf(&sb, "\t%.*s = %s",
1051 length, key + store.baselen + 1, quote);
1053 for (i = 0; value[i]; i++)
1054 switch (value[i]) {
1055 case '\n':
1056 strbuf_addstr(&sb, "\\n");
1057 break;
1058 case '\t':
1059 strbuf_addstr(&sb, "\\t");
1060 break;
1061 case '"':
1062 case '\\':
1063 strbuf_addch(&sb, '\\');
1064 default:
1065 strbuf_addch(&sb, value[i]);
1066 break;
1067 }
1068 strbuf_addf(&sb, "%s\n", quote);
1070 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1071 strbuf_release(&sb);
1073 return success;
1074 }
1076 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1077 size_t offset_, int *found_bracket)
1078 {
1079 size_t equal_offset = size, bracket_offset = size;
1080 ssize_t offset;
1082 contline:
1083 for (offset = offset_-2; offset > 0
1084 && contents[offset] != '\n'; offset--)
1085 switch (contents[offset]) {
1086 case '=': equal_offset = offset; break;
1087 case ']': bracket_offset = offset; break;
1088 }
1089 if (offset > 0 && contents[offset-1] == '\\') {
1090 offset_ = offset;
1091 goto contline;
1092 }
1093 if (bracket_offset < equal_offset) {
1094 *found_bracket = 1;
1095 offset = bracket_offset+1;
1096 } else
1097 offset++;
1099 return offset;
1100 }
1102 int git_config_set(const char *key, const char *value)
1103 {
1104 return git_config_set_multivar(key, value, NULL, 0);
1105 }
1107 /*
1108 * If value==NULL, unset in (remove from) config,
1109 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1110 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1111 * else all matching key/values (regardless how many) are removed,
1112 * before the new pair is written.
1113 *
1114 * Returns 0 on success.
1115 *
1116 * This function does this:
1117 *
1118 * - it locks the config file by creating ".git/config.lock"
1119 *
1120 * - it then parses the config using store_aux() as validator to find
1121 * the position on the key/value pair to replace. If it is to be unset,
1122 * it must be found exactly once.
1123 *
1124 * - the config file is mmap()ed and the part before the match (if any) is
1125 * written to the lock file, then the changed part and the rest.
1126 *
1127 * - the config file is removed and the lock file rename()d to it.
1128 *
1129 */
1130 int git_config_set_multivar(const char *key, const char *value,
1131 const char *value_regex, int multi_replace)
1132 {
1133 int i, dot;
1134 int fd = -1, in_fd;
1135 int ret;
1136 char *config_filename;
1137 struct lock_file *lock = NULL;
1138 const char *last_dot = strrchr(key, '.');
1140 if (config_exclusive_filename)
1141 config_filename = xstrdup(config_exclusive_filename);
1142 else
1143 config_filename = git_pathdup("config");
1145 /*
1146 * Since "key" actually contains the section name and the real
1147 * key name separated by a dot, we have to know where the dot is.
1148 */
1150 if (last_dot == NULL) {
1151 error("key does not contain a section: %s", key);
1152 ret = 2;
1153 goto out_free;
1154 }
1155 store.baselen = last_dot - key;
1157 store.multi_replace = multi_replace;
1159 /*
1160 * Validate the key and while at it, lower case it for matching.
1161 */
1162 store.key = xmalloc(strlen(key) + 1);
1163 dot = 0;
1164 for (i = 0; key[i]; i++) {
1165 unsigned char c = key[i];
1166 if (c == '.')
1167 dot = 1;
1168 /* Leave the extended basename untouched.. */
1169 if (!dot || i > store.baselen) {
1170 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
1171 error("invalid key: %s", key);
1172 free(store.key);
1173 ret = 1;
1174 goto out_free;
1175 }
1176 c = tolower(c);
1177 } else if (c == '\n') {
1178 error("invalid key (newline): %s", key);
1179 free(store.key);
1180 ret = 1;
1181 goto out_free;
1182 }
1183 store.key[i] = c;
1184 }
1185 store.key[i] = 0;
1187 /*
1188 * The lock serves a purpose in addition to locking: the new
1189 * contents of .git/config will be written into it.
1190 */
1191 lock = xcalloc(sizeof(struct lock_file), 1);
1192 fd = hold_lock_file_for_update(lock, config_filename, 0);
1193 if (fd < 0) {
1194 error("could not lock config file %s: %s", config_filename, strerror(errno));
1195 free(store.key);
1196 ret = -1;
1197 goto out_free;
1198 }
1200 /*
1201 * If .git/config does not exist yet, write a minimal version.
1202 */
1203 in_fd = open(config_filename, O_RDONLY);
1204 if ( in_fd < 0 ) {
1205 free(store.key);
1207 if ( ENOENT != errno ) {
1208 error("opening %s: %s", config_filename,
1209 strerror(errno));
1210 ret = 3; /* same as "invalid config file" */
1211 goto out_free;
1212 }
1213 /* if nothing to unset, error out */
1214 if (value == NULL) {
1215 ret = 5;
1216 goto out_free;
1217 }
1219 store.key = (char *)key;
1220 if (!store_write_section(fd, key) ||
1221 !store_write_pair(fd, key, value))
1222 goto write_err_out;
1223 } else {
1224 struct stat st;
1225 char *contents;
1226 size_t contents_sz, copy_begin, copy_end;
1227 int i, new_line = 0;
1229 if (value_regex == NULL)
1230 store.value_regex = NULL;
1231 else {
1232 if (value_regex[0] == '!') {
1233 store.do_not_match = 1;
1234 value_regex++;
1235 } else
1236 store.do_not_match = 0;
1238 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1239 if (regcomp(store.value_regex, value_regex,
1240 REG_EXTENDED)) {
1241 error("invalid pattern: %s", value_regex);
1242 free(store.value_regex);
1243 ret = 6;
1244 goto out_free;
1245 }
1246 }
1248 store.offset[0] = 0;
1249 store.state = START;
1250 store.seen = 0;
1252 /*
1253 * After this, store.offset will contain the *end* offset
1254 * of the last match, or remain at 0 if no match was found.
1255 * As a side effect, we make sure to transform only a valid
1256 * existing config file.
1257 */
1258 if (git_config_from_file(store_aux, config_filename, NULL)) {
1259 error("invalid config file %s", config_filename);
1260 free(store.key);
1261 if (store.value_regex != NULL) {
1262 regfree(store.value_regex);
1263 free(store.value_regex);
1264 }
1265 ret = 3;
1266 goto out_free;
1267 }
1269 free(store.key);
1270 if (store.value_regex != NULL) {
1271 regfree(store.value_regex);
1272 free(store.value_regex);
1273 }
1275 /* if nothing to unset, or too many matches, error out */
1276 if ((store.seen == 0 && value == NULL) ||
1277 (store.seen > 1 && multi_replace == 0)) {
1278 ret = 5;
1279 goto out_free;
1280 }
1282 fstat(in_fd, &st);
1283 contents_sz = xsize_t(st.st_size);
1284 contents = xmmap(NULL, contents_sz, PROT_READ,
1285 MAP_PRIVATE, in_fd, 0);
1286 close(in_fd);
1288 if (store.seen == 0)
1289 store.seen = 1;
1291 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1292 if (store.offset[i] == 0) {
1293 store.offset[i] = copy_end = contents_sz;
1294 } else if (store.state != KEY_SEEN) {
1295 copy_end = store.offset[i];
1296 } else
1297 copy_end = find_beginning_of_line(
1298 contents, contents_sz,
1299 store.offset[i]-2, &new_line);
1301 if (copy_end > 0 && contents[copy_end-1] != '\n')
1302 new_line = 1;
1304 /* write the first part of the config */
1305 if (copy_end > copy_begin) {
1306 if (write_in_full(fd, contents + copy_begin,
1307 copy_end - copy_begin) <
1308 copy_end - copy_begin)
1309 goto write_err_out;
1310 if (new_line &&
1311 write_str_in_full(fd, "\n") != 1)
1312 goto write_err_out;
1313 }
1314 copy_begin = store.offset[i];
1315 }
1317 /* write the pair (value == NULL means unset) */
1318 if (value != NULL) {
1319 if (store.state == START) {
1320 if (!store_write_section(fd, key))
1321 goto write_err_out;
1322 }
1323 if (!store_write_pair(fd, key, value))
1324 goto write_err_out;
1325 }
1327 /* write the rest of the config */
1328 if (copy_begin < contents_sz)
1329 if (write_in_full(fd, contents + copy_begin,
1330 contents_sz - copy_begin) <
1331 contents_sz - copy_begin)
1332 goto write_err_out;
1334 munmap(contents, contents_sz);
1335 }
1337 if (commit_lock_file(lock) < 0) {
1338 error("could not commit config file %s", config_filename);
1339 ret = 4;
1340 goto out_free;
1341 }
1343 /*
1344 * lock is committed, so don't try to roll it back below.
1345 * NOTE: Since lockfile.c keeps a linked list of all created
1346 * lock_file structures, it isn't safe to free(lock). It's
1347 * better to just leave it hanging around.
1348 */
1349 lock = NULL;
1350 ret = 0;
1352 out_free:
1353 if (lock)
1354 rollback_lock_file(lock);
1355 free(config_filename);
1356 return ret;
1358 write_err_out:
1359 ret = write_error(lock->filename);
1360 goto out_free;
1362 }
1364 static int section_name_match (const char *buf, const char *name)
1365 {
1366 int i = 0, j = 0, dot = 0;
1367 if (buf[i] != '[')
1368 return 0;
1369 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1370 if (!dot && isspace(buf[i])) {
1371 dot = 1;
1372 if (name[j++] != '.')
1373 break;
1374 for (i++; isspace(buf[i]); i++)
1375 ; /* do nothing */
1376 if (buf[i] != '"')
1377 break;
1378 continue;
1379 }
1380 if (buf[i] == '\\' && dot)
1381 i++;
1382 else if (buf[i] == '"' && dot) {
1383 for (i++; isspace(buf[i]); i++)
1384 ; /* do_nothing */
1385 break;
1386 }
1387 if (buf[i] != name[j++])
1388 break;
1389 }
1390 if (buf[i] == ']' && name[j] == 0) {
1391 /*
1392 * We match, now just find the right length offset by
1393 * gobbling up any whitespace after it, as well
1394 */
1395 i++;
1396 for (; buf[i] && isspace(buf[i]); i++)
1397 ; /* do nothing */
1398 return i;
1399 }
1400 return 0;
1401 }
1403 /* if new_name == NULL, the section is removed instead */
1404 int git_config_rename_section(const char *old_name, const char *new_name)
1405 {
1406 int ret = 0, remove = 0;
1407 char *config_filename;
1408 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1409 int out_fd;
1410 char buf[1024];
1412 if (config_exclusive_filename)
1413 config_filename = xstrdup(config_exclusive_filename);
1414 else
1415 config_filename = git_pathdup("config");
1416 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1417 if (out_fd < 0) {
1418 ret = error("could not lock config file %s", config_filename);
1419 goto out;
1420 }
1422 if (!(config_file = fopen(config_filename, "rb"))) {
1423 /* no config file means nothing to rename, no error */
1424 goto unlock_and_out;
1425 }
1427 while (fgets(buf, sizeof(buf), config_file)) {
1428 int i;
1429 int length;
1430 char *output = buf;
1431 for (i = 0; buf[i] && isspace(buf[i]); i++)
1432 ; /* do nothing */
1433 if (buf[i] == '[') {
1434 /* it's a section */
1435 int offset = section_name_match(&buf[i], old_name);
1436 if (offset > 0) {
1437 ret++;
1438 if (new_name == NULL) {
1439 remove = 1;
1440 continue;
1441 }
1442 store.baselen = strlen(new_name);
1443 if (!store_write_section(out_fd, new_name)) {
1444 ret = write_error(lock->filename);
1445 goto out;
1446 }
1447 /*
1448 * We wrote out the new section, with
1449 * a newline, now skip the old
1450 * section's length
1451 */
1452 output += offset + i;
1453 if (strlen(output) > 0) {
1454 /*
1455 * More content means there's
1456 * a declaration to put on the
1457 * next line; indent with a
1458 * tab
1459 */
1460 output -= 1;
1461 output[0] = '\t';
1462 }
1463 }
1464 remove = 0;
1465 }
1466 if (remove)
1467 continue;
1468 length = strlen(output);
1469 if (write_in_full(out_fd, output, length) != length) {
1470 ret = write_error(lock->filename);
1471 goto out;
1472 }
1473 }
1474 fclose(config_file);
1475 unlock_and_out:
1476 if (commit_lock_file(lock) < 0)
1477 ret = error("could not commit config file %s", config_filename);
1478 out:
1479 free(config_filename);
1480 return ret;
1481 }
1483 /*
1484 * Call this to report error for your variable that should not
1485 * get a boolean value (i.e. "[my] var" means "true").
1486 */
1487 int config_error_nonbool(const char *var)
1488 {
1489 return error("Missing value for '%s'", var);
1490 }