2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
12 static FILE *config_file;
13 static const char *config_file_name;
14 static int config_linenr;
15 static int get_next_char(void)
21 if ((f = config_file) != NULL) {
24 /* DOS like systems */
41 static char *parse_value(void)
43 static char value[1024];
44 int quote = 0, comment = 0, len = 0, space = 0;
47 int c = get_next_char();
48 if (len >= sizeof(value))
58 if (isspace(c) && !quote) {
63 if (c == ';' || c == '#') {
87 /* Some characters escape as themselves */
90 /* Reject unknown escape sequences */
105 static inline int iskeychar(int c)
107 return isalnum(c) || c == '-';
110 static int get_value(config_fn_t fn, char *name, unsigned int len)
115 /* Get the full name */
122 name[len++] = tolower(c);
127 while (c == ' ' || c == '\t')
134 value = parse_value();
138 return fn(name, value);
141 static int get_extended_base_var(char *name, int baselen, int c)
147 } while (isspace(c));
149 /* We require the format to be '[base "extension"]' */
152 name[baselen++] = '.';
155 int c = get_next_char();
166 if (baselen > MAXNAME / 2)
171 if (get_next_char() != ']')
176 static int get_base_var(char *name)
181 int c = get_next_char();
187 return get_extended_base_var(name, baselen, c);
188 if (!iskeychar(c) && c != '.')
190 if (baselen > MAXNAME / 2)
192 name[baselen++] = tolower(c);
196 static int git_parse_file(config_fn_t fn)
200 static char var[MAXNAME];
203 int c = get_next_char();
211 if (comment || isspace(c))
213 if (c == '#' || c == ';') {
218 baselen = get_base_var(var);
221 var[baselen++] = '.';
227 var[baselen] = tolower(c);
228 if (get_value(fn, var, baselen+1) < 0)
231 die("bad config file line %d in %s", config_linenr, config_file_name);
234 int git_config_int(const char *name, const char *value)
236 if (value && *value) {
238 int val = strtol(value, &end, 0);
241 if (!strcasecmp(end, "k"))
243 if (!strcasecmp(end, "m"))
244 return val * 1024 * 1024;
245 if (!strcasecmp(end, "g"))
246 return val * 1024 * 1024 * 1024;
248 die("bad config value for '%s' in %s", name, config_file_name);
251 int git_config_bool(const char *name, const char *value)
257 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
259 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
261 return git_config_int(name, value) != 0;
264 int git_default_config(const char *var, const char *value)
266 /* This needs a better name */
267 if (!strcmp(var, "core.filemode")) {
268 trust_executable_bit = git_config_bool(var, value);
272 if (!strcmp(var, "core.ignorestat")) {
273 assume_unchanged = git_config_bool(var, value);
277 if (!strcmp(var, "core.prefersymlinkrefs")) {
278 prefer_symlink_refs = git_config_bool(var, value);
282 if (!strcmp(var, "core.logallrefupdates")) {
283 log_all_ref_updates = git_config_bool(var, value);
287 if (!strcmp(var, "core.warnambiguousrefs")) {
288 warn_ambiguous_refs = git_config_bool(var, value);
292 if (!strcmp(var, "core.legacyheaders")) {
293 use_legacy_headers = git_config_bool(var, value);
297 if (!strcmp(var, "core.compression")) {
298 int level = git_config_int(var, value);
300 level = Z_DEFAULT_COMPRESSION;
301 else if (level < 0 || level > Z_BEST_COMPRESSION)
302 die("bad zlib compression level %d", level);
303 zlib_compression_level = level;
307 if (!strcmp(var, "user.name")) {
308 strlcpy(git_default_name, value, sizeof(git_default_name));
312 if (!strcmp(var, "user.email")) {
313 strlcpy(git_default_email, value, sizeof(git_default_email));
317 if (!strcmp(var, "i18n.commitencoding")) {
318 git_commit_encoding = strdup(value);
322 if (!strcmp(var, "i18n.logoutputencoding")) {
323 git_log_output_encoding = strdup(value);
328 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
329 pager_use_color = git_config_bool(var,value);
333 /* Add other config variables here and to Documentation/config.txt. */
337 int git_config_from_file(config_fn_t fn, const char *filename)
340 FILE *f = fopen(filename, "r");
345 config_file_name = filename;
347 ret = git_parse_file(fn);
349 config_file_name = NULL;
354 int git_config(config_fn_t fn)
357 char *repo_config = NULL;
358 const char *home = NULL, *filename;
360 /* $GIT_CONFIG makes git read _only_ the given config file,
361 * $GIT_CONFIG_LOCAL will make it process it in addition to the
362 * global config file, the same way it would the per-repository
363 * config file otherwise. */
364 filename = getenv(CONFIG_ENVIRONMENT);
366 home = getenv("HOME");
367 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
369 filename = repo_config = xstrdup(git_path("config"));
373 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
374 if (!access(user_config, R_OK))
375 ret = git_config_from_file(fn, user_config);
379 ret += git_config_from_file(fn, filename);
385 * Find all the stuff for git_config_set() below.
388 #define MAX_MATCHES 512
394 regex_t* value_regex;
396 off_t offset[MAX_MATCHES];
397 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
401 static int matches(const char* key, const char* value)
403 return !strcmp(key, store.key) &&
404 (store.value_regex == NULL ||
405 (store.do_not_match ^
406 !regexec(store.value_regex, value, 0, NULL, 0)));
409 static int store_aux(const char* key, const char* value)
411 switch (store.state) {
413 if (matches(key, value)) {
414 if (store.seen == 1 && store.multi_replace == 0) {
416 "Warning: %s has multiple values\n",
418 } else if (store.seen >= MAX_MATCHES) {
419 fprintf(stderr, "Too many matches\n");
423 store.offset[store.seen] = ftell(config_file);
428 if (strncmp(key, store.key, store.baselen+1)) {
429 store.state = SECTION_END_SEEN;
432 /* do not increment matches: this is no match */
433 store.offset[store.seen] = ftell(config_file);
435 case SECTION_END_SEEN:
437 if (matches(key, value)) {
438 store.offset[store.seen] = ftell(config_file);
439 store.state = KEY_SEEN;
442 if (strrchr(key, '.') - key == store.baselen &&
443 !strncmp(key, store.key, store.baselen)) {
444 store.state = SECTION_SEEN;
445 store.offset[store.seen] = ftell(config_file);
452 static void store_write_section(int fd, const char* key)
454 const char *dot = strchr(key, '.');
455 int len1 = store.baselen, len2 = -1;
457 dot = strchr(key, '.');
459 int dotlen = dot - key;
461 len2 = len1 - dotlen - 1;
467 write(fd, key, len1);
470 while (--len2 >= 0) {
471 unsigned char c = *++dot;
481 static void store_write_pair(int fd, const char* key, const char* value)
486 write(fd, key+store.baselen+1,
487 strlen(key+store.baselen+1));
489 for (i = 0; value[i]; i++)
491 case '\n': write(fd, "\\n", 2); break;
492 case '\t': write(fd, "\\t", 2); break;
493 case '"': case '\\': write(fd, "\\", 1);
494 default: write(fd, value+i, 1);
499 static int find_beginning_of_line(const char* contents, int size,
500 int offset_, int* found_bracket)
502 int equal_offset = size, bracket_offset = size;
505 for (offset = offset_-2; offset > 0
506 && contents[offset] != '\n'; offset--)
507 switch (contents[offset]) {
508 case '=': equal_offset = offset; break;
509 case ']': bracket_offset = offset; break;
511 if (bracket_offset < equal_offset) {
513 offset = bracket_offset+1;
520 int git_config_set(const char* key, const char* value)
522 return git_config_set_multivar(key, value, NULL, 0);
526 * If value==NULL, unset in (remove from) config,
527 * if value_regex!=NULL, disregard key/value pairs where value does not match.
528 * if multi_replace==0, nothing, or only one matching key/value is replaced,
529 * else all matching key/values (regardless how many) are removed,
530 * before the new pair is written.
532 * Returns 0 on success.
534 * This function does this:
536 * - it locks the config file by creating ".git/config.lock"
538 * - it then parses the config using store_aux() as validator to find
539 * the position on the key/value pair to replace. If it is to be unset,
540 * it must be found exactly once.
542 * - the config file is mmap()ed and the part before the match (if any) is
543 * written to the lock file, then the changed part and the rest.
545 * - the config file is removed and the lock file rename()d to it.
548 int git_config_set_multivar(const char* key, const char* value,
549 const char* value_regex, int multi_replace)
554 char* config_filename;
556 const char* last_dot = strrchr(key, '.');
558 config_filename = getenv(CONFIG_ENVIRONMENT);
559 if (!config_filename) {
560 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
561 if (!config_filename)
562 config_filename = git_path("config");
564 config_filename = xstrdup(config_filename);
565 lock_file = xstrdup(mkpath("%s.lock", config_filename));
568 * Since "key" actually contains the section name and the real
569 * key name separated by a dot, we have to know where the dot is.
572 if (last_dot == NULL) {
573 fprintf(stderr, "key does not contain a section: %s\n", key);
577 store.baselen = last_dot - key;
579 store.multi_replace = multi_replace;
582 * Validate the key and while at it, lower case it for matching.
584 store.key = xmalloc(strlen(key) + 1);
586 for (i = 0; key[i]; i++) {
587 unsigned char c = key[i];
590 /* Leave the extended basename untouched.. */
591 if (!dot || i > store.baselen) {
592 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
593 fprintf(stderr, "invalid key: %s\n", key);
605 * The lock_file serves a purpose in addition to locking: the new
606 * contents of .git/config will be written into it.
608 fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
609 if (fd < 0 || adjust_shared_perm(lock_file)) {
610 fprintf(stderr, "could not lock config file\n");
617 * If .git/config does not exist yet, write a minimal version.
619 in_fd = open(config_filename, O_RDONLY);
623 if ( ENOENT != errno ) {
624 error("opening %s: %s", config_filename,
626 ret = 3; /* same as "invalid config file" */
629 /* if nothing to unset, error out */
635 store.key = (char*)key;
636 store_write_section(fd, key);
637 store_write_pair(fd, key, value);
641 int i, copy_begin, copy_end, new_line = 0;
643 if (value_regex == NULL)
644 store.value_regex = NULL;
646 if (value_regex[0] == '!') {
647 store.do_not_match = 1;
650 store.do_not_match = 0;
652 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
653 if (regcomp(store.value_regex, value_regex,
655 fprintf(stderr, "Invalid pattern: %s\n",
657 free(store.value_regex);
668 * After this, store.offset will contain the *end* offset
669 * of the last match, or remain at 0 if no match was found.
670 * As a side effect, we make sure to transform only a valid
671 * existing config file.
673 if (git_config_from_file(store_aux, config_filename)) {
674 fprintf(stderr, "invalid config file\n");
676 if (store.value_regex != NULL) {
677 regfree(store.value_regex);
678 free(store.value_regex);
685 if (store.value_regex != NULL) {
686 regfree(store.value_regex);
687 free(store.value_regex);
690 /* if nothing to unset, or too many matches, error out */
691 if ((store.seen == 0 && value == NULL) ||
692 (store.seen > 1 && multi_replace == 0)) {
698 contents = mmap(NULL, st.st_size, PROT_READ,
699 MAP_PRIVATE, in_fd, 0);
705 for (i = 0, copy_begin = 0; i < store.seen; i++) {
706 if (store.offset[i] == 0) {
707 store.offset[i] = copy_end = st.st_size;
708 } else if (store.state != KEY_SEEN) {
709 copy_end = store.offset[i];
711 copy_end = find_beginning_of_line(
712 contents, st.st_size,
713 store.offset[i]-2, &new_line);
715 /* write the first part of the config */
716 if (copy_end > copy_begin) {
717 write(fd, contents + copy_begin,
718 copy_end - copy_begin);
722 copy_begin = store.offset[i];
725 /* write the pair (value == NULL means unset) */
727 if (store.state == START)
728 store_write_section(fd, key);
729 store_write_pair(fd, key, value);
732 /* write the rest of the config */
733 if (copy_begin < st.st_size)
734 write(fd, contents + copy_begin,
735 st.st_size - copy_begin);
737 munmap(contents, st.st_size);
738 unlink(config_filename);
741 if (rename(lock_file, config_filename) < 0) {
742 fprintf(stderr, "Could not rename the lock file?\n");
752 free(config_filename);
760 int git_config_rename_section(const char *old_name, const char *new_name)
763 char *config_filename;
764 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
768 config_filename = getenv(CONFIG_ENVIRONMENT);
769 if (!config_filename) {
770 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
771 if (!config_filename)
772 config_filename = git_path("config");
774 config_filename = xstrdup(config_filename);
775 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
777 ret = error("Could not lock config file!");
781 if (!(config_file = fopen(config_filename, "rb"))) {
782 ret = error("Could not open config file!");
786 while (fgets(buf, sizeof(buf), config_file)) {
788 for (i = 0; buf[i] && isspace(buf[i]); i++)
793 for (i++; buf[i] && buf[i] != ']'; i++) {
794 if (!dot && isspace(buf[i])) {
796 if (old_name[j++] != '.')
798 for (i++; isspace(buf[i]); i++)
804 if (buf[i] == '\\' && dot)
806 else if (buf[i] == '"' && dot) {
807 for (i++; isspace(buf[i]); i++)
811 if (buf[i] != old_name[j++])
815 /* old_name matches */
817 store.baselen = strlen(new_name);
818 store_write_section(out_fd, new_name);
822 write(out_fd, buf, strlen(buf));
825 if (close(out_fd) || commit_lock_file(lock) < 0)
826 ret = error("Cannot commit config file!");
828 free(config_filename);