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);
242 die("bad config value for '%s' in %s", name, config_file_name);
245 int git_config_bool(const char *name, const char *value)
251 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
253 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
255 return git_config_int(name, value) != 0;
258 int git_default_config(const char *var, const char *value)
260 /* This needs a better name */
261 if (!strcmp(var, "core.filemode")) {
262 trust_executable_bit = git_config_bool(var, value);
266 if (!strcmp(var, "core.ignorestat")) {
267 assume_unchanged = git_config_bool(var, value);
271 if (!strcmp(var, "core.prefersymlinkrefs")) {
272 prefer_symlink_refs = git_config_bool(var, value);
276 if (!strcmp(var, "core.logallrefupdates")) {
277 log_all_ref_updates = git_config_bool(var, value);
281 if (!strcmp(var, "core.warnambiguousrefs")) {
282 warn_ambiguous_refs = git_config_bool(var, value);
286 if (!strcmp(var, "core.legacyheaders")) {
287 use_legacy_headers = git_config_bool(var, value);
291 if (!strcmp(var, "core.compression")) {
292 int level = git_config_int(var, value);
294 level = Z_DEFAULT_COMPRESSION;
295 else if (level < 0 || level > Z_BEST_COMPRESSION)
296 die("bad zlib compression level %d", level);
297 zlib_compression_level = level;
301 if (!strcmp(var, "user.name")) {
302 strlcpy(git_default_name, value, sizeof(git_default_name));
306 if (!strcmp(var, "user.email")) {
307 strlcpy(git_default_email, value, sizeof(git_default_email));
311 if (!strcmp(var, "i18n.commitencoding")) {
312 git_commit_encoding = strdup(value);
316 if (!strcmp(var, "i18n.logoutputencoding")) {
317 git_log_output_encoding = strdup(value);
322 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
323 pager_use_color = git_config_bool(var,value);
327 /* Add other config variables here and to Documentation/config.txt. */
331 int git_config_from_file(config_fn_t fn, const char *filename)
334 FILE *f = fopen(filename, "r");
339 config_file_name = filename;
341 ret = git_parse_file(fn);
343 config_file_name = NULL;
348 int git_config(config_fn_t fn)
351 char *repo_config = NULL;
352 const char *home = NULL, *filename;
354 /* $GIT_CONFIG makes git read _only_ the given config file,
355 * $GIT_CONFIG_LOCAL will make it process it in addition to the
356 * global config file, the same way it would the per-repository
357 * config file otherwise. */
358 filename = getenv(CONFIG_ENVIRONMENT);
360 home = getenv("HOME");
361 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
363 filename = repo_config = xstrdup(git_path("config"));
367 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
368 if (!access(user_config, R_OK))
369 ret = git_config_from_file(fn, user_config);
373 ret += git_config_from_file(fn, filename);
379 * Find all the stuff for git_config_set() below.
382 #define MAX_MATCHES 512
388 regex_t* value_regex;
390 off_t offset[MAX_MATCHES];
391 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
395 static int matches(const char* key, const char* value)
397 return !strcmp(key, store.key) &&
398 (store.value_regex == NULL ||
399 (store.do_not_match ^
400 !regexec(store.value_regex, value, 0, NULL, 0)));
403 static int store_aux(const char* key, const char* value)
405 switch (store.state) {
407 if (matches(key, value)) {
408 if (store.seen == 1 && store.multi_replace == 0) {
410 "Warning: %s has multiple values\n",
412 } else if (store.seen >= MAX_MATCHES) {
413 fprintf(stderr, "Too many matches\n");
417 store.offset[store.seen] = ftell(config_file);
422 if (strncmp(key, store.key, store.baselen+1)) {
423 store.state = SECTION_END_SEEN;
426 /* do not increment matches: this is no match */
427 store.offset[store.seen] = ftell(config_file);
429 case SECTION_END_SEEN:
431 if (matches(key, value)) {
432 store.offset[store.seen] = ftell(config_file);
433 store.state = KEY_SEEN;
436 if (strrchr(key, '.') - key == store.baselen &&
437 !strncmp(key, store.key, store.baselen)) {
438 store.state = SECTION_SEEN;
439 store.offset[store.seen] = ftell(config_file);
446 static void store_write_section(int fd, const char* key)
448 const char *dot = strchr(key, '.');
449 int len1 = store.baselen, len2 = -1;
451 dot = strchr(key, '.');
453 int dotlen = dot - key;
455 len2 = len1 - dotlen - 1;
461 write(fd, key, len1);
464 while (--len2 >= 0) {
465 unsigned char c = *++dot;
475 static void store_write_pair(int fd, const char* key, const char* value)
480 write(fd, key+store.baselen+1,
481 strlen(key+store.baselen+1));
483 for (i = 0; value[i]; i++)
485 case '\n': write(fd, "\\n", 2); break;
486 case '\t': write(fd, "\\t", 2); break;
487 case '"': case '\\': write(fd, "\\", 1);
488 default: write(fd, value+i, 1);
493 static int find_beginning_of_line(const char* contents, int size,
494 int offset_, int* found_bracket)
496 int equal_offset = size, bracket_offset = size;
499 for (offset = offset_-2; offset > 0
500 && contents[offset] != '\n'; offset--)
501 switch (contents[offset]) {
502 case '=': equal_offset = offset; break;
503 case ']': bracket_offset = offset; break;
505 if (bracket_offset < equal_offset) {
507 offset = bracket_offset+1;
514 int git_config_set(const char* key, const char* value)
516 return git_config_set_multivar(key, value, NULL, 0);
520 * If value==NULL, unset in (remove from) config,
521 * if value_regex!=NULL, disregard key/value pairs where value does not match.
522 * if multi_replace==0, nothing, or only one matching key/value is replaced,
523 * else all matching key/values (regardless how many) are removed,
524 * before the new pair is written.
526 * Returns 0 on success.
528 * This function does this:
530 * - it locks the config file by creating ".git/config.lock"
532 * - it then parses the config using store_aux() as validator to find
533 * the position on the key/value pair to replace. If it is to be unset,
534 * it must be found exactly once.
536 * - the config file is mmap()ed and the part before the match (if any) is
537 * written to the lock file, then the changed part and the rest.
539 * - the config file is removed and the lock file rename()d to it.
542 int git_config_set_multivar(const char* key, const char* value,
543 const char* value_regex, int multi_replace)
548 char* config_filename;
550 const char* last_dot = strrchr(key, '.');
552 config_filename = getenv(CONFIG_ENVIRONMENT);
553 if (!config_filename) {
554 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
555 if (!config_filename)
556 config_filename = git_path("config");
558 config_filename = xstrdup(config_filename);
559 lock_file = xstrdup(mkpath("%s.lock", config_filename));
562 * Since "key" actually contains the section name and the real
563 * key name separated by a dot, we have to know where the dot is.
566 if (last_dot == NULL) {
567 fprintf(stderr, "key does not contain a section: %s\n", key);
571 store.baselen = last_dot - key;
573 store.multi_replace = multi_replace;
576 * Validate the key and while at it, lower case it for matching.
578 store.key = xmalloc(strlen(key) + 1);
580 for (i = 0; key[i]; i++) {
581 unsigned char c = key[i];
584 /* Leave the extended basename untouched.. */
585 if (!dot || i > store.baselen) {
586 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
587 fprintf(stderr, "invalid key: %s\n", key);
599 * The lock_file serves a purpose in addition to locking: the new
600 * contents of .git/config will be written into it.
602 fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
603 if (fd < 0 || adjust_shared_perm(lock_file)) {
604 fprintf(stderr, "could not lock config file\n");
611 * If .git/config does not exist yet, write a minimal version.
613 in_fd = open(config_filename, O_RDONLY);
617 if ( ENOENT != errno ) {
618 error("opening %s: %s", config_filename,
620 ret = 3; /* same as "invalid config file" */
623 /* if nothing to unset, error out */
629 store.key = (char*)key;
630 store_write_section(fd, key);
631 store_write_pair(fd, key, value);
635 int i, copy_begin, copy_end, new_line = 0;
637 if (value_regex == NULL)
638 store.value_regex = NULL;
640 if (value_regex[0] == '!') {
641 store.do_not_match = 1;
644 store.do_not_match = 0;
646 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
647 if (regcomp(store.value_regex, value_regex,
649 fprintf(stderr, "Invalid pattern: %s\n",
651 free(store.value_regex);
662 * After this, store.offset will contain the *end* offset
663 * of the last match, or remain at 0 if no match was found.
664 * As a side effect, we make sure to transform only a valid
665 * existing config file.
667 if (git_config_from_file(store_aux, config_filename)) {
668 fprintf(stderr, "invalid config file\n");
670 if (store.value_regex != NULL) {
671 regfree(store.value_regex);
672 free(store.value_regex);
679 if (store.value_regex != NULL) {
680 regfree(store.value_regex);
681 free(store.value_regex);
684 /* if nothing to unset, or too many matches, error out */
685 if ((store.seen == 0 && value == NULL) ||
686 (store.seen > 1 && multi_replace == 0)) {
692 contents = mmap(NULL, st.st_size, PROT_READ,
693 MAP_PRIVATE, in_fd, 0);
699 for (i = 0, copy_begin = 0; i < store.seen; i++) {
700 if (store.offset[i] == 0) {
701 store.offset[i] = copy_end = st.st_size;
702 } else if (store.state != KEY_SEEN) {
703 copy_end = store.offset[i];
705 copy_end = find_beginning_of_line(
706 contents, st.st_size,
707 store.offset[i]-2, &new_line);
709 /* write the first part of the config */
710 if (copy_end > copy_begin) {
711 write(fd, contents + copy_begin,
712 copy_end - copy_begin);
716 copy_begin = store.offset[i];
719 /* write the pair (value == NULL means unset) */
721 if (store.state == START)
722 store_write_section(fd, key);
723 store_write_pair(fd, key, value);
726 /* write the rest of the config */
727 if (copy_begin < st.st_size)
728 write(fd, contents + copy_begin,
729 st.st_size - copy_begin);
731 munmap(contents, st.st_size);
732 unlink(config_filename);
735 if (rename(lock_file, config_filename) < 0) {
736 fprintf(stderr, "Could not rename the lock file?\n");
746 free(config_filename);
754 int git_config_rename_section(const char *old_name, const char *new_name)
757 char *config_filename;
758 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
762 config_filename = getenv(CONFIG_ENVIRONMENT);
763 if (!config_filename) {
764 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
765 if (!config_filename)
766 config_filename = git_path("config");
768 config_filename = xstrdup(config_filename);
769 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
771 ret = error("Could not lock config file!");
775 if (!(config_file = fopen(config_filename, "rb"))) {
776 ret = error("Could not open config file!");
780 while (fgets(buf, sizeof(buf), config_file)) {
782 for (i = 0; buf[i] && isspace(buf[i]); i++)
787 for (i++; buf[i] && buf[i] != ']'; i++) {
788 if (!dot && isspace(buf[i])) {
790 if (old_name[j++] != '.')
792 for (i++; isspace(buf[i]); i++)
798 if (buf[i] == '\\' && dot)
800 else if (buf[i] == '"' && dot) {
801 for (i++; isspace(buf[i]); i++)
805 if (buf[i] != old_name[j++])
809 /* old_name matches */
811 store.baselen = strlen(new_name);
812 store_write_section(out_fd, new_name);
816 write(out_fd, buf, strlen(buf));
819 if (close(out_fd) || commit_lock_file(lock) < 0)
820 ret = error("Cannot commit config file!");
822 free(config_filename);