Make the MSVC projects use PDB/IDB files named after the project
[git/dscho.git] / config.c
blob49010e4890fcebaef26c4d9e8fe251784393278c
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
11 #define MAXNAME (256)
13 static FILE *config_file;
14 static const char *config_file_name;
15 static int config_linenr;
16 static int config_file_eof;
17 static int zlib_compression_seen;
19 const char *config_exclusive_filename = NULL;
21 static int get_next_char(void)
23 int c;
24 FILE *f;
26 c = '\n';
27 if ((f = config_file) != NULL) {
28 c = fgetc(f);
29 if (c == '\r') {
30 /* DOS like systems */
31 c = fgetc(f);
32 if (c != '\n') {
33 ungetc(c, f);
34 c = '\r';
37 if (c == '\n')
38 config_linenr++;
39 if (c == EOF) {
40 config_file_eof = 1;
41 c = '\n';
44 return c;
47 static char *parse_value(void)
49 static char value[1024];
50 int quote = 0, comment = 0, len = 0, space = 0;
52 for (;;) {
53 int c = get_next_char();
54 if (len >= sizeof(value) - 1)
55 return NULL;
56 if (c == '\n') {
57 if (quote)
58 return NULL;
59 value[len] = 0;
60 return value;
62 if (comment)
63 continue;
64 if (isspace(c) && !quote) {
65 if (len)
66 space++;
67 continue;
69 if (!quote) {
70 if (c == ';' || c == '#') {
71 comment = 1;
72 continue;
75 for (; space; space--)
76 value[len++] = ' ';
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;
91 /* Some characters escape as themselves */
92 case '\\': case '"':
93 break;
94 /* Reject unknown escape sequences */
95 default:
96 return NULL;
98 value[len++] = c;
99 continue;
101 if (c == '"') {
102 quote = 1-quote;
103 continue;
105 value[len++] = c;
109 static inline int iskeychar(int c)
111 return isalnum(c) || c == '-';
114 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
116 int c;
117 char *value;
119 /* Get the full name */
120 for (;;) {
121 c = get_next_char();
122 if (config_file_eof)
123 break;
124 if (!iskeychar(c))
125 break;
126 name[len++] = tolower(c);
127 if (len >= MAXNAME)
128 return -1;
130 name[len] = 0;
131 while (c == ' ' || c == '\t')
132 c = get_next_char();
134 value = NULL;
135 if (c != '\n') {
136 if (c != '=')
137 return -1;
138 value = parse_value();
139 if (!value)
140 return -1;
142 return fn(name, value, data);
145 static int get_extended_base_var(char *name, int baselen, int c)
147 do {
148 if (c == '\n')
149 return -1;
150 c = get_next_char();
151 } while (isspace(c));
153 /* We require the format to be '[base "extension"]' */
154 if (c != '"')
155 return -1;
156 name[baselen++] = '.';
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;
169 name[baselen++] = c;
170 if (baselen > MAXNAME / 2)
171 return -1;
174 /* Final ']' */
175 if (get_next_char() != ']')
176 return -1;
177 return baselen;
180 static int get_base_var(char *name)
182 int baselen = 0;
184 for (;;) {
185 int c = get_next_char();
186 if (config_file_eof)
187 return -1;
188 if (c == ']')
189 return baselen;
190 if (isspace(c))
191 return get_extended_base_var(name, baselen, c);
192 if (!iskeychar(c) && c != '.')
193 return -1;
194 if (baselen > MAXNAME / 2)
195 return -1;
196 name[baselen++] = tolower(c);
200 static int git_parse_file(config_fn_t fn, void *data)
202 int comment = 0;
203 int baselen = 0;
204 static char var[MAXNAME];
206 /* U+FEFF Byte Order Mark in UTF8 */
207 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
208 const unsigned char *bomptr = utf8_bom;
210 for (;;) {
211 int c = get_next_char();
212 if (bomptr && *bomptr) {
213 /* We are at the file beginning; skip UTF8-encoded BOM
214 * if present. Sane editors won't put this in on their
215 * own, but e.g. Windows Notepad will do it happily. */
216 if ((unsigned char) c == *bomptr) {
217 bomptr++;
218 continue;
219 } else {
220 /* Do not tolerate partial BOM. */
221 if (bomptr != utf8_bom)
222 break;
223 /* No BOM at file beginning. Cool. */
224 bomptr = NULL;
227 if (c == '\n') {
228 if (config_file_eof)
229 return 0;
230 comment = 0;
231 continue;
233 if (comment || isspace(c))
234 continue;
235 if (c == '#' || c == ';') {
236 comment = 1;
237 continue;
239 if (c == '[') {
240 baselen = get_base_var(var);
241 if (baselen <= 0)
242 break;
243 var[baselen++] = '.';
244 var[baselen] = 0;
245 continue;
247 if (!isalpha(c))
248 break;
249 var[baselen] = tolower(c);
250 if (get_value(fn, data, var, baselen+1) < 0)
251 break;
253 die("bad config file line %d in %s", config_linenr, config_file_name);
256 static int parse_unit_factor(const char *end, unsigned long *val)
258 if (!*end)
259 return 1;
260 else if (!strcasecmp(end, "k")) {
261 *val *= 1024;
262 return 1;
264 else if (!strcasecmp(end, "m")) {
265 *val *= 1024 * 1024;
266 return 1;
268 else if (!strcasecmp(end, "g")) {
269 *val *= 1024 * 1024 * 1024;
270 return 1;
272 return 0;
275 static int git_parse_long(const char *value, long *ret)
277 if (value && *value) {
278 char *end;
279 long val = strtol(value, &end, 0);
280 unsigned long factor = 1;
281 if (!parse_unit_factor(end, &factor))
282 return 0;
283 *ret = val * factor;
284 return 1;
286 return 0;
289 int git_parse_ulong(const char *value, unsigned long *ret)
291 if (value && *value) {
292 char *end;
293 unsigned long val = strtoul(value, &end, 0);
294 if (!parse_unit_factor(end, &val))
295 return 0;
296 *ret = val;
297 return 1;
299 return 0;
302 static void die_bad_config(const char *name)
304 if (config_file_name)
305 die("bad config value for '%s' in %s", name, config_file_name);
306 die("bad config value for '%s'", name);
309 int git_config_int(const char *name, const char *value)
311 long ret = 0;
312 if (!git_parse_long(value, &ret))
313 die_bad_config(name);
314 return ret;
317 unsigned long git_config_ulong(const char *name, const char *value)
319 unsigned long ret;
320 if (!git_parse_ulong(value, &ret))
321 die_bad_config(name);
322 return ret;
325 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
327 *is_bool = 1;
328 if (!value)
329 return 1;
330 if (!*value)
331 return 0;
332 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on"))
333 return 1;
334 if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off"))
335 return 0;
336 *is_bool = 0;
337 return git_config_int(name, value);
340 int git_config_bool(const char *name, const char *value)
342 int discard;
343 return !!git_config_bool_or_int(name, value, &discard);
346 int git_config_string(const char **dest, const char *var, const char *value)
348 if (!value)
349 return config_error_nonbool(var);
350 *dest = xstrdup(value);
351 return 0;
354 static int git_default_core_config(const char *var, const char *value)
356 /* This needs a better name */
357 if (!strcmp(var, "core.filemode")) {
358 trust_executable_bit = git_config_bool(var, value);
359 return 0;
361 if (!strcmp(var, "core.trustctime")) {
362 trust_ctime = git_config_bool(var, value);
363 return 0;
366 if (!strcmp(var, "core.quotepath")) {
367 quote_path_fully = git_config_bool(var, value);
368 return 0;
371 if (!strcmp(var, "core.symlinks")) {
372 has_symlinks = git_config_bool(var, value);
373 return 0;
376 if (!strcmp(var, "core.ignorecase")) {
377 ignore_case = git_config_bool(var, value);
378 return 0;
381 if (!strcmp(var, "core.bare")) {
382 is_bare_repository_cfg = git_config_bool(var, value);
383 return 0;
386 if (!strcmp(var, "core.ignorestat")) {
387 assume_unchanged = git_config_bool(var, value);
388 return 0;
391 if (!strcmp(var, "core.prefersymlinkrefs")) {
392 prefer_symlink_refs = git_config_bool(var, value);
393 return 0;
396 if (!strcmp(var, "core.logallrefupdates")) {
397 log_all_ref_updates = git_config_bool(var, value);
398 return 0;
401 if (!strcmp(var, "core.warnambiguousrefs")) {
402 warn_ambiguous_refs = git_config_bool(var, value);
403 return 0;
406 if (!strcmp(var, "core.loosecompression")) {
407 int level = git_config_int(var, value);
408 if (level == -1)
409 level = Z_DEFAULT_COMPRESSION;
410 else if (level < 0 || level > Z_BEST_COMPRESSION)
411 die("bad zlib compression level %d", level);
412 zlib_compression_level = level;
413 zlib_compression_seen = 1;
414 return 0;
417 if (!strcmp(var, "core.compression")) {
418 int level = git_config_int(var, value);
419 if (level == -1)
420 level = Z_DEFAULT_COMPRESSION;
421 else if (level < 0 || level > Z_BEST_COMPRESSION)
422 die("bad zlib compression level %d", level);
423 core_compression_level = level;
424 core_compression_seen = 1;
425 if (!zlib_compression_seen)
426 zlib_compression_level = level;
427 return 0;
430 if (!strcmp(var, "core.packedgitwindowsize")) {
431 int pgsz_x2 = getpagesize() * 2;
432 packed_git_window_size = git_config_int(var, value);
434 /* This value must be multiple of (pagesize * 2) */
435 packed_git_window_size /= pgsz_x2;
436 if (packed_git_window_size < 1)
437 packed_git_window_size = 1;
438 packed_git_window_size *= pgsz_x2;
439 return 0;
442 if (!strcmp(var, "core.packedgitlimit")) {
443 packed_git_limit = git_config_int(var, value);
444 return 0;
447 if (!strcmp(var, "core.deltabasecachelimit")) {
448 delta_base_cache_limit = git_config_int(var, value);
449 return 0;
452 if (!strcmp(var, "core.autocrlf")) {
453 if (value && !strcasecmp(value, "input")) {
454 auto_crlf = -1;
455 return 0;
457 auto_crlf = git_config_bool(var, value);
458 return 0;
461 if (!strcmp(var, "core.safecrlf")) {
462 if (value && !strcasecmp(value, "warn")) {
463 safe_crlf = SAFE_CRLF_WARN;
464 return 0;
466 safe_crlf = git_config_bool(var, value);
467 return 0;
470 if (!strcmp(var, "core.pager"))
471 return git_config_string(&pager_program, var, value);
473 if (!strcmp(var, "core.editor"))
474 return git_config_string(&editor_program, var, value);
476 if (!strcmp(var, "core.excludesfile"))
477 return git_config_string(&excludes_file, var, value);
479 if (!strcmp(var, "core.whitespace")) {
480 if (!value)
481 return config_error_nonbool(var);
482 whitespace_rule_cfg = parse_whitespace_rule(value);
483 return 0;
486 if (!strcmp(var, "core.fsyncobjectfiles")) {
487 fsync_object_files = git_config_bool(var, value);
488 return 0;
491 if (!strcmp(var, "core.preloadindex")) {
492 core_preload_index = git_config_bool(var, value);
493 return 0;
496 if (!strcmp(var, "core.createobject")) {
497 if (!strcmp(value, "rename"))
498 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
499 else if (!strcmp(value, "link"))
500 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
501 else
502 die("Invalid mode for object creation: %s", value);
503 return 0;
506 if (!strcmp(var, "core.hidedotfiles")) {
507 hide_dotfiles = git_config_bool(var, value);
508 return 0;
511 /* Add other config variables here and to Documentation/config.txt. */
512 return 0;
515 static int git_default_user_config(const char *var, const char *value)
517 if (!strcmp(var, "user.name")) {
518 if (!value)
519 return config_error_nonbool(var);
520 strlcpy(git_default_name, value, sizeof(git_default_name));
521 if (git_default_email[0])
522 user_ident_explicitly_given = 1;
523 return 0;
526 if (!strcmp(var, "user.email")) {
527 if (!value)
528 return config_error_nonbool(var);
529 strlcpy(git_default_email, value, sizeof(git_default_email));
530 if (git_default_name[0])
531 user_ident_explicitly_given = 1;
532 return 0;
535 /* Add other config variables here and to Documentation/config.txt. */
536 return 0;
539 static int git_default_i18n_config(const char *var, const char *value)
541 if (!strcmp(var, "i18n.commitencoding"))
542 return git_config_string(&git_commit_encoding, var, value);
544 if (!strcmp(var, "i18n.logoutputencoding"))
545 return git_config_string(&git_log_output_encoding, var, value);
547 /* Add other config variables here and to Documentation/config.txt. */
548 return 0;
551 static int git_default_branch_config(const char *var, const char *value)
553 if (!strcmp(var, "branch.autosetupmerge")) {
554 if (value && !strcasecmp(value, "always")) {
555 git_branch_track = BRANCH_TRACK_ALWAYS;
556 return 0;
558 git_branch_track = git_config_bool(var, value);
559 return 0;
561 if (!strcmp(var, "branch.autosetuprebase")) {
562 if (!value)
563 return config_error_nonbool(var);
564 else if (!strcmp(value, "never"))
565 autorebase = AUTOREBASE_NEVER;
566 else if (!strcmp(value, "local"))
567 autorebase = AUTOREBASE_LOCAL;
568 else if (!strcmp(value, "remote"))
569 autorebase = AUTOREBASE_REMOTE;
570 else if (!strcmp(value, "always"))
571 autorebase = AUTOREBASE_ALWAYS;
572 else
573 return error("Malformed value for %s", var);
574 return 0;
577 /* Add other config variables here and to Documentation/config.txt. */
578 return 0;
581 static int git_default_push_config(const char *var, const char *value)
583 if (!strcmp(var, "push.default")) {
584 if (!value)
585 return config_error_nonbool(var);
586 else if (!strcmp(value, "nothing"))
587 push_default = PUSH_DEFAULT_NOTHING;
588 else if (!strcmp(value, "matching"))
589 push_default = PUSH_DEFAULT_MATCHING;
590 else if (!strcmp(value, "tracking"))
591 push_default = PUSH_DEFAULT_TRACKING;
592 else if (!strcmp(value, "current"))
593 push_default = PUSH_DEFAULT_CURRENT;
594 else {
595 error("Malformed value for %s: %s", var, value);
596 return error("Must be one of nothing, matching, "
597 "tracking or current.");
599 return 0;
602 /* Add other config variables here and to Documentation/config.txt. */
603 return 0;
606 static int git_default_mailmap_config(const char *var, const char *value)
608 if (!strcmp(var, "mailmap.file"))
609 return git_config_string(&git_mailmap_file, var, value);
611 /* Add other config variables here and to Documentation/config.txt. */
612 return 0;
615 int git_default_config(const char *var, const char *value, void *dummy)
617 if (!prefixcmp(var, "core."))
618 return git_default_core_config(var, value);
620 if (!prefixcmp(var, "user."))
621 return git_default_user_config(var, value);
623 if (!prefixcmp(var, "i18n."))
624 return git_default_i18n_config(var, value);
626 if (!prefixcmp(var, "branch."))
627 return git_default_branch_config(var, value);
629 if (!prefixcmp(var, "push."))
630 return git_default_push_config(var, value);
632 if (!prefixcmp(var, "mailmap."))
633 return git_default_mailmap_config(var, value);
635 if (!prefixcmp(var, "advice."))
636 return git_default_advice_config(var, value);
638 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
639 pager_use_color = git_config_bool(var,value);
640 return 0;
643 /* Add other config variables here and to Documentation/config.txt. */
644 return 0;
647 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
649 int ret;
650 FILE *f = fopen(filename, "r");
652 ret = -1;
653 if (f) {
654 config_file = f;
655 config_file_name = filename;
656 config_linenr = 1;
657 config_file_eof = 0;
658 ret = git_parse_file(fn, data);
659 fclose(f);
660 config_file_name = NULL;
662 return ret;
665 const char *git_etc_gitconfig(void)
667 static const char *system_wide;
668 if (!system_wide)
669 system_wide = system_path(ETC_GITCONFIG);
670 return system_wide;
673 static int git_env_bool(const char *k, int def)
675 const char *v = getenv(k);
676 return v ? git_config_bool(k, v) : def;
679 int git_config_system(void)
681 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
684 int git_config_global(void)
686 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
689 int git_config(config_fn_t fn, void *data)
691 int ret = 0, found = 0;
692 char *repo_config = NULL;
693 const char *home = NULL;
695 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
696 if (config_exclusive_filename)
697 return git_config_from_file(fn, config_exclusive_filename, data);
698 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
699 ret += git_config_from_file(fn, git_etc_gitconfig(),
700 data);
701 found += 1;
704 home = getenv("HOME");
705 if (git_config_global() && home) {
706 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
707 if (!access(user_config, R_OK)) {
708 ret += git_config_from_file(fn, user_config, data);
709 found += 1;
711 free(user_config);
714 repo_config = git_pathdup("config");
715 if (!access(repo_config, R_OK)) {
716 ret += git_config_from_file(fn, repo_config, data);
717 found += 1;
719 free(repo_config);
720 if (found == 0)
721 return -1;
722 return ret;
726 * Find all the stuff for git_config_set() below.
729 #define MAX_MATCHES 512
731 static struct {
732 int baselen;
733 char *key;
734 int do_not_match;
735 regex_t *value_regex;
736 int multi_replace;
737 size_t offset[MAX_MATCHES];
738 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
739 int seen;
740 } store;
742 static int matches(const char *key, const char *value)
744 return !strcmp(key, store.key) &&
745 (store.value_regex == NULL ||
746 (store.do_not_match ^
747 !regexec(store.value_regex, value, 0, NULL, 0)));
750 static int store_aux(const char *key, const char *value, void *cb)
752 const char *ep;
753 size_t section_len;
755 switch (store.state) {
756 case KEY_SEEN:
757 if (matches(key, value)) {
758 if (store.seen == 1 && store.multi_replace == 0) {
759 warning("%s has multiple values", key);
760 } else if (store.seen >= MAX_MATCHES) {
761 error("too many matches for %s", key);
762 return 1;
765 store.offset[store.seen] = ftell(config_file);
766 store.seen++;
768 break;
769 case SECTION_SEEN:
771 * What we are looking for is in store.key (both
772 * section and var), and its section part is baselen
773 * long. We found key (again, both section and var).
774 * We would want to know if this key is in the same
775 * section as what we are looking for. We already
776 * know we are in the same section as what should
777 * hold store.key.
779 ep = strrchr(key, '.');
780 section_len = ep - key;
782 if ((section_len != store.baselen) ||
783 memcmp(key, store.key, section_len+1)) {
784 store.state = SECTION_END_SEEN;
785 break;
789 * Do not increment matches: this is no match, but we
790 * just made sure we are in the desired section.
792 store.offset[store.seen] = ftell(config_file);
793 /* fallthru */
794 case SECTION_END_SEEN:
795 case START:
796 if (matches(key, value)) {
797 store.offset[store.seen] = ftell(config_file);
798 store.state = KEY_SEEN;
799 store.seen++;
800 } else {
801 if (strrchr(key, '.') - key == store.baselen &&
802 !strncmp(key, store.key, store.baselen)) {
803 store.state = SECTION_SEEN;
804 store.offset[store.seen] = ftell(config_file);
808 return 0;
811 static int write_error(const char *filename)
813 error("failed to write new configuration file %s", filename);
815 /* Same error code as "failed to rename". */
816 return 4;
819 static int store_write_section(int fd, const char *key)
821 const char *dot;
822 int i, success;
823 struct strbuf sb = STRBUF_INIT;
825 dot = memchr(key, '.', store.baselen);
826 if (dot) {
827 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
828 for (i = dot - key + 1; i < store.baselen; i++) {
829 if (key[i] == '"' || key[i] == '\\')
830 strbuf_addch(&sb, '\\');
831 strbuf_addch(&sb, key[i]);
833 strbuf_addstr(&sb, "\"]\n");
834 } else {
835 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
838 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
839 strbuf_release(&sb);
841 return success;
844 static int store_write_pair(int fd, const char *key, const char *value)
846 int i, success;
847 int length = strlen(key + store.baselen + 1);
848 const char *quote = "";
849 struct strbuf sb = STRBUF_INIT;
852 * Check to see if the value needs to be surrounded with a dq pair.
853 * Note that problematic characters are always backslash-quoted; this
854 * check is about not losing leading or trailing SP and strings that
855 * follow beginning-of-comment characters (i.e. ';' and '#') by the
856 * configuration parser.
858 if (value[0] == ' ')
859 quote = "\"";
860 for (i = 0; value[i]; i++)
861 if (value[i] == ';' || value[i] == '#')
862 quote = "\"";
863 if (i && value[i - 1] == ' ')
864 quote = "\"";
866 strbuf_addf(&sb, "\t%.*s = %s",
867 length, key + store.baselen + 1, quote);
869 for (i = 0; value[i]; i++)
870 switch (value[i]) {
871 case '\n':
872 strbuf_addstr(&sb, "\\n");
873 break;
874 case '\t':
875 strbuf_addstr(&sb, "\\t");
876 break;
877 case '"':
878 case '\\':
879 strbuf_addch(&sb, '\\');
880 default:
881 strbuf_addch(&sb, value[i]);
882 break;
884 strbuf_addf(&sb, "%s\n", quote);
886 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
887 strbuf_release(&sb);
889 return success;
892 static ssize_t find_beginning_of_line(const char *contents, size_t size,
893 size_t offset_, int *found_bracket)
895 size_t equal_offset = size, bracket_offset = size;
896 ssize_t offset;
898 contline:
899 for (offset = offset_-2; offset > 0
900 && contents[offset] != '\n'; offset--)
901 switch (contents[offset]) {
902 case '=': equal_offset = offset; break;
903 case ']': bracket_offset = offset; break;
905 if (offset > 0 && contents[offset-1] == '\\') {
906 offset_ = offset;
907 goto contline;
909 if (bracket_offset < equal_offset) {
910 *found_bracket = 1;
911 offset = bracket_offset+1;
912 } else
913 offset++;
915 return offset;
918 int git_config_set(const char *key, const char *value)
920 return git_config_set_multivar(key, value, NULL, 0);
924 * If value==NULL, unset in (remove from) config,
925 * if value_regex!=NULL, disregard key/value pairs where value does not match.
926 * if multi_replace==0, nothing, or only one matching key/value is replaced,
927 * else all matching key/values (regardless how many) are removed,
928 * before the new pair is written.
930 * Returns 0 on success.
932 * This function does this:
934 * - it locks the config file by creating ".git/config.lock"
936 * - it then parses the config using store_aux() as validator to find
937 * the position on the key/value pair to replace. If it is to be unset,
938 * it must be found exactly once.
940 * - the config file is mmap()ed and the part before the match (if any) is
941 * written to the lock file, then the changed part and the rest.
943 * - the config file is removed and the lock file rename()d to it.
946 int git_config_set_multivar(const char *key, const char *value,
947 const char *value_regex, int multi_replace)
949 int i, dot;
950 int fd = -1, in_fd;
951 int ret;
952 char *config_filename;
953 struct lock_file *lock = NULL;
954 const char *last_dot = strrchr(key, '.');
956 if (config_exclusive_filename)
957 config_filename = xstrdup(config_exclusive_filename);
958 else
959 config_filename = git_pathdup("config");
962 * Since "key" actually contains the section name and the real
963 * key name separated by a dot, we have to know where the dot is.
966 if (last_dot == NULL) {
967 error("key does not contain a section: %s", key);
968 ret = 2;
969 goto out_free;
971 store.baselen = last_dot - key;
973 store.multi_replace = multi_replace;
976 * Validate the key and while at it, lower case it for matching.
978 store.key = xmalloc(strlen(key) + 1);
979 dot = 0;
980 for (i = 0; key[i]; i++) {
981 unsigned char c = key[i];
982 if (c == '.')
983 dot = 1;
984 /* Leave the extended basename untouched.. */
985 if (!dot || i > store.baselen) {
986 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
987 error("invalid key: %s", key);
988 free(store.key);
989 ret = 1;
990 goto out_free;
992 c = tolower(c);
993 } else if (c == '\n') {
994 error("invalid key (newline): %s", key);
995 free(store.key);
996 ret = 1;
997 goto out_free;
999 store.key[i] = c;
1001 store.key[i] = 0;
1004 * The lock serves a purpose in addition to locking: the new
1005 * contents of .git/config will be written into it.
1007 lock = xcalloc(sizeof(struct lock_file), 1);
1008 fd = hold_lock_file_for_update(lock, config_filename, 0);
1009 if (fd < 0) {
1010 error("could not lock config file %s: %s", config_filename, strerror(errno));
1011 free(store.key);
1012 ret = -1;
1013 goto out_free;
1017 * If .git/config does not exist yet, write a minimal version.
1019 in_fd = open(config_filename, O_RDONLY);
1020 if ( in_fd < 0 ) {
1021 free(store.key);
1023 if ( ENOENT != errno ) {
1024 error("opening %s: %s", config_filename,
1025 strerror(errno));
1026 ret = 3; /* same as "invalid config file" */
1027 goto out_free;
1029 /* if nothing to unset, error out */
1030 if (value == NULL) {
1031 ret = 5;
1032 goto out_free;
1035 store.key = (char *)key;
1036 if (!store_write_section(fd, key) ||
1037 !store_write_pair(fd, key, value))
1038 goto write_err_out;
1039 } else {
1040 struct stat st;
1041 char *contents;
1042 size_t contents_sz, copy_begin, copy_end;
1043 int i, new_line = 0;
1045 if (value_regex == NULL)
1046 store.value_regex = NULL;
1047 else {
1048 if (value_regex[0] == '!') {
1049 store.do_not_match = 1;
1050 value_regex++;
1051 } else
1052 store.do_not_match = 0;
1054 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1055 if (regcomp(store.value_regex, value_regex,
1056 REG_EXTENDED)) {
1057 error("invalid pattern: %s", value_regex);
1058 free(store.value_regex);
1059 ret = 6;
1060 goto out_free;
1064 store.offset[0] = 0;
1065 store.state = START;
1066 store.seen = 0;
1069 * After this, store.offset will contain the *end* offset
1070 * of the last match, or remain at 0 if no match was found.
1071 * As a side effect, we make sure to transform only a valid
1072 * existing config file.
1074 if (git_config_from_file(store_aux, config_filename, NULL)) {
1075 error("invalid config file %s", config_filename);
1076 free(store.key);
1077 if (store.value_regex != NULL) {
1078 regfree(store.value_regex);
1079 free(store.value_regex);
1081 ret = 3;
1082 goto out_free;
1085 free(store.key);
1086 if (store.value_regex != NULL) {
1087 regfree(store.value_regex);
1088 free(store.value_regex);
1091 /* if nothing to unset, or too many matches, error out */
1092 if ((store.seen == 0 && value == NULL) ||
1093 (store.seen > 1 && multi_replace == 0)) {
1094 ret = 5;
1095 goto out_free;
1098 fstat(in_fd, &st);
1099 contents_sz = xsize_t(st.st_size);
1100 contents = xmmap(NULL, contents_sz, PROT_READ,
1101 MAP_PRIVATE, in_fd, 0);
1102 close(in_fd);
1104 if (store.seen == 0)
1105 store.seen = 1;
1107 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1108 if (store.offset[i] == 0) {
1109 store.offset[i] = copy_end = contents_sz;
1110 } else if (store.state != KEY_SEEN) {
1111 copy_end = store.offset[i];
1112 } else
1113 copy_end = find_beginning_of_line(
1114 contents, contents_sz,
1115 store.offset[i]-2, &new_line);
1117 if (copy_end > 0 && contents[copy_end-1] != '\n')
1118 new_line = 1;
1120 /* write the first part of the config */
1121 if (copy_end > copy_begin) {
1122 if (write_in_full(fd, contents + copy_begin,
1123 copy_end - copy_begin) <
1124 copy_end - copy_begin)
1125 goto write_err_out;
1126 if (new_line &&
1127 write_str_in_full(fd, "\n") != 1)
1128 goto write_err_out;
1130 copy_begin = store.offset[i];
1133 /* write the pair (value == NULL means unset) */
1134 if (value != NULL) {
1135 if (store.state == START) {
1136 if (!store_write_section(fd, key))
1137 goto write_err_out;
1139 if (!store_write_pair(fd, key, value))
1140 goto write_err_out;
1143 /* write the rest of the config */
1144 if (copy_begin < contents_sz)
1145 if (write_in_full(fd, contents + copy_begin,
1146 contents_sz - copy_begin) <
1147 contents_sz - copy_begin)
1148 goto write_err_out;
1150 munmap(contents, contents_sz);
1153 if (commit_lock_file(lock) < 0) {
1154 error("could not commit config file %s", config_filename);
1155 ret = 4;
1156 goto out_free;
1160 * lock is committed, so don't try to roll it back below.
1161 * NOTE: Since lockfile.c keeps a linked list of all created
1162 * lock_file structures, it isn't safe to free(lock). It's
1163 * better to just leave it hanging around.
1165 lock = NULL;
1166 ret = 0;
1168 out_free:
1169 if (lock)
1170 rollback_lock_file(lock);
1171 free(config_filename);
1172 return ret;
1174 write_err_out:
1175 ret = write_error(lock->filename);
1176 goto out_free;
1180 static int section_name_match (const char *buf, const char *name)
1182 int i = 0, j = 0, dot = 0;
1183 if (buf[i] != '[')
1184 return 0;
1185 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1186 if (!dot && isspace(buf[i])) {
1187 dot = 1;
1188 if (name[j++] != '.')
1189 break;
1190 for (i++; isspace(buf[i]); i++)
1191 ; /* do nothing */
1192 if (buf[i] != '"')
1193 break;
1194 continue;
1196 if (buf[i] == '\\' && dot)
1197 i++;
1198 else if (buf[i] == '"' && dot) {
1199 for (i++; isspace(buf[i]); i++)
1200 ; /* do_nothing */
1201 break;
1203 if (buf[i] != name[j++])
1204 break;
1206 if (buf[i] == ']' && name[j] == 0) {
1208 * We match, now just find the right length offset by
1209 * gobbling up any whitespace after it, as well
1211 i++;
1212 for (; buf[i] && isspace(buf[i]); i++)
1213 ; /* do nothing */
1214 return i;
1216 return 0;
1219 /* if new_name == NULL, the section is removed instead */
1220 int git_config_rename_section(const char *old_name, const char *new_name)
1222 int ret = 0, remove = 0;
1223 char *config_filename;
1224 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1225 int out_fd;
1226 char buf[1024];
1228 if (config_exclusive_filename)
1229 config_filename = xstrdup(config_exclusive_filename);
1230 else
1231 config_filename = git_pathdup("config");
1232 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1233 if (out_fd < 0) {
1234 ret = error("could not lock config file %s", config_filename);
1235 goto out;
1238 if (!(config_file = fopen(config_filename, "rb"))) {
1239 /* no config file means nothing to rename, no error */
1240 goto unlock_and_out;
1243 while (fgets(buf, sizeof(buf), config_file)) {
1244 int i;
1245 int length;
1246 char *output = buf;
1247 for (i = 0; buf[i] && isspace(buf[i]); i++)
1248 ; /* do nothing */
1249 if (buf[i] == '[') {
1250 /* it's a section */
1251 int offset = section_name_match(&buf[i], old_name);
1252 if (offset > 0) {
1253 ret++;
1254 if (new_name == NULL) {
1255 remove = 1;
1256 continue;
1258 store.baselen = strlen(new_name);
1259 if (!store_write_section(out_fd, new_name)) {
1260 ret = write_error(lock->filename);
1261 goto out;
1264 * We wrote out the new section, with
1265 * a newline, now skip the old
1266 * section's length
1268 output += offset + i;
1269 if (strlen(output) > 0) {
1271 * More content means there's
1272 * a declaration to put on the
1273 * next line; indent with a
1274 * tab
1276 output -= 1;
1277 output[0] = '\t';
1280 remove = 0;
1282 if (remove)
1283 continue;
1284 length = strlen(output);
1285 if (write_in_full(out_fd, output, length) != length) {
1286 ret = write_error(lock->filename);
1287 goto out;
1290 fclose(config_file);
1291 unlock_and_out:
1292 if (commit_lock_file(lock) < 0)
1293 ret = error("could not commit config file %s", config_filename);
1294 out:
1295 free(config_filename);
1296 return ret;
1300 * Call this to report error for your variable that should not
1301 * get a boolean value (i.e. "[my] var" means "true").
1303 int config_error_nonbool(const char *var)
1305 return error("Missing value for '%s'", var);