2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
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 static void lowercase(char *p)
29 void git_config_push_parameter(const char *text)
31 struct strbuf env = STRBUF_INIT;
32 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
34 strbuf_addstr(&env, old);
35 strbuf_addch(&env, ' ');
37 sq_quote_buf(&env, text);
38 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
42 static int git_config_parse_parameter(const char *text,
43 config_fn_t fn, void *data)
45 struct strbuf tmp = STRBUF_INIT;
47 strbuf_addstr(&tmp, text);
48 pair = strbuf_split(&tmp, '=');
49 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
50 strbuf_setlen(pair[0], pair[0]->len - 1);
53 strbuf_list_free(pair);
54 return error("bogus config parameter: %s", text);
56 lowercase(pair[0]->buf);
57 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
58 strbuf_list_free(pair);
61 strbuf_list_free(pair);
65 int git_config_from_parameters(config_fn_t fn, void *data)
67 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
69 const char **argv = NULL;
70 int nr = 0, alloc = 0;
75 /* sq_dequote will write over it */
78 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
80 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
83 for (i = 0; i < nr; i++) {
84 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
96 static int get_next_char(void)
102 if ((f = config_file) != NULL) {
105 /* DOS like systems */
122 static char *parse_value(void)
124 static struct strbuf value = STRBUF_INIT;
125 int quote = 0, comment = 0, space = 0;
127 strbuf_reset(&value);
129 int c = get_next_char();
137 if (isspace(c) && !quote) {
143 if (c == ';' || c == '#') {
148 for (; space; space--)
149 strbuf_addch(&value, ' ');
164 /* Some characters escape as themselves */
167 /* Reject unknown escape sequences */
171 strbuf_addch(&value, c);
178 strbuf_addch(&value, c);
182 static inline int iskeychar(int c)
184 return isalnum(c) || c == '-';
187 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
192 /* Get the full name */
199 name[len++] = tolower(c);
204 while (c == ' ' || c == '\t')
211 value = parse_value();
215 return fn(name, value, data);
218 static int get_extended_base_var(char *name, int baselen, int c)
224 } while (isspace(c));
226 /* We require the format to be '[base "extension"]' */
229 name[baselen++] = '.';
232 int c = get_next_char();
243 if (baselen > MAXNAME / 2)
248 if (get_next_char() != ']')
253 static int get_base_var(char *name)
258 int c = get_next_char();
264 return get_extended_base_var(name, baselen, c);
265 if (!iskeychar(c) && c != '.')
267 if (baselen > MAXNAME / 2)
269 name[baselen++] = tolower(c);
273 static int git_parse_file(config_fn_t fn, void *data)
277 static char var[MAXNAME];
279 /* U+FEFF Byte Order Mark in UTF8 */
280 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
281 const unsigned char *bomptr = utf8_bom;
284 int c = get_next_char();
285 if (bomptr && *bomptr) {
286 /* We are at the file beginning; skip UTF8-encoded BOM
287 * if present. Sane editors won't put this in on their
288 * own, but e.g. Windows Notepad will do it happily. */
289 if ((unsigned char) c == *bomptr) {
293 /* Do not tolerate partial BOM. */
294 if (bomptr != utf8_bom)
296 /* No BOM at file beginning. Cool. */
306 if (comment || isspace(c))
308 if (c == '#' || c == ';') {
313 baselen = get_base_var(var);
316 var[baselen++] = '.';
322 var[baselen] = tolower(c);
323 if (get_value(fn, data, var, baselen+1) < 0)
326 die("bad config file line %d in %s", config_linenr, config_file_name);
329 static int parse_unit_factor(const char *end, unsigned long *val)
333 else if (!strcasecmp(end, "k")) {
337 else if (!strcasecmp(end, "m")) {
341 else if (!strcasecmp(end, "g")) {
342 *val *= 1024 * 1024 * 1024;
348 static int git_parse_long(const char *value, long *ret)
350 if (value && *value) {
352 long val = strtol(value, &end, 0);
353 unsigned long factor = 1;
354 if (!parse_unit_factor(end, &factor))
362 int git_parse_ulong(const char *value, unsigned long *ret)
364 if (value && *value) {
366 unsigned long val = strtoul(value, &end, 0);
367 if (!parse_unit_factor(end, &val))
375 static void die_bad_config(const char *name)
377 if (config_file_name)
378 die("bad config value for '%s' in %s", name, config_file_name);
379 die("bad config value for '%s'", name);
382 int git_config_int(const char *name, const char *value)
385 if (!git_parse_long(value, &ret))
386 die_bad_config(name);
390 unsigned long git_config_ulong(const char *name, const char *value)
393 if (!git_parse_ulong(value, &ret))
394 die_bad_config(name);
398 static int git_config_maybe_bool_text(const char *name, const char *value)
404 if (!strcasecmp(value, "true")
405 || !strcasecmp(value, "yes")
406 || !strcasecmp(value, "on"))
408 if (!strcasecmp(value, "false")
409 || !strcasecmp(value, "no")
410 || !strcasecmp(value, "off"))
415 int git_config_maybe_bool(const char *name, const char *value)
417 long v = git_config_maybe_bool_text(name, value);
420 if (git_parse_long(value, &v))
425 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
427 int v = git_config_maybe_bool_text(name, value);
433 return git_config_int(name, value);
436 int git_config_bool(const char *name, const char *value)
439 return !!git_config_bool_or_int(name, value, &discard);
442 int git_config_string(const char **dest, const char *var, const char *value)
445 return config_error_nonbool(var);
446 *dest = xstrdup(value);
450 int git_config_pathname(const char **dest, const char *var, const char *value)
453 return config_error_nonbool(var);
454 *dest = expand_user_path(value);
456 die("Failed to expand user dir in: '%s'", value);
460 static int git_default_core_config(const char *var, const char *value)
462 /* This needs a better name */
463 if (!strcmp(var, "core.filemode")) {
464 trust_executable_bit = git_config_bool(var, value);
467 if (!strcmp(var, "core.trustctime")) {
468 trust_ctime = git_config_bool(var, value);
472 if (!strcmp(var, "core.quotepath")) {
473 quote_path_fully = git_config_bool(var, value);
477 if (!strcmp(var, "core.symlinks")) {
478 has_symlinks = git_config_bool(var, value);
482 if (!strcmp(var, "core.ignorecase")) {
483 ignore_case = git_config_bool(var, value);
487 if (!strcmp(var, "core.bare")) {
488 is_bare_repository_cfg = git_config_bool(var, value);
492 if (!strcmp(var, "core.ignorestat")) {
493 assume_unchanged = git_config_bool(var, value);
497 if (!strcmp(var, "core.prefersymlinkrefs")) {
498 prefer_symlink_refs = git_config_bool(var, value);
502 if (!strcmp(var, "core.logallrefupdates")) {
503 log_all_ref_updates = git_config_bool(var, value);
507 if (!strcmp(var, "core.warnambiguousrefs")) {
508 warn_ambiguous_refs = git_config_bool(var, value);
512 if (!strcmp(var, "core.abbrev")) {
513 int abbrev = git_config_int(var, value);
514 if (abbrev < minimum_abbrev || abbrev > 40)
516 default_abbrev = abbrev;
520 if (!strcmp(var, "core.loosecompression")) {
521 int level = git_config_int(var, value);
523 level = Z_DEFAULT_COMPRESSION;
524 else if (level < 0 || level > Z_BEST_COMPRESSION)
525 die("bad zlib compression level %d", level);
526 zlib_compression_level = level;
527 zlib_compression_seen = 1;
531 if (!strcmp(var, "core.compression")) {
532 int level = git_config_int(var, value);
534 level = Z_DEFAULT_COMPRESSION;
535 else if (level < 0 || level > Z_BEST_COMPRESSION)
536 die("bad zlib compression level %d", level);
537 core_compression_level = level;
538 core_compression_seen = 1;
539 if (!zlib_compression_seen)
540 zlib_compression_level = level;
544 if (!strcmp(var, "core.packedgitwindowsize")) {
545 int pgsz_x2 = getpagesize() * 2;
546 packed_git_window_size = git_config_int(var, value);
548 /* This value must be multiple of (pagesize * 2) */
549 packed_git_window_size /= pgsz_x2;
550 if (packed_git_window_size < 1)
551 packed_git_window_size = 1;
552 packed_git_window_size *= pgsz_x2;
556 if (!strcmp(var, "core.bigfilethreshold")) {
557 long n = git_config_int(var, value);
558 big_file_threshold = 0 < n ? n : 0;
562 if (!strcmp(var, "core.packedgitlimit")) {
563 packed_git_limit = git_config_int(var, value);
567 if (!strcmp(var, "core.deltabasecachelimit")) {
568 delta_base_cache_limit = git_config_int(var, value);
572 if (!strcmp(var, "core.autocrlf")) {
573 if (value && !strcasecmp(value, "input")) {
574 if (core_eol == EOL_CRLF)
575 return error("core.autocrlf=input conflicts with core.eol=crlf");
576 auto_crlf = AUTO_CRLF_INPUT;
579 auto_crlf = git_config_bool(var, value);
583 if (!strcmp(var, "core.safecrlf")) {
584 if (value && !strcasecmp(value, "warn")) {
585 safe_crlf = SAFE_CRLF_WARN;
588 safe_crlf = git_config_bool(var, value);
592 if (!strcmp(var, "core.eol")) {
593 if (value && !strcasecmp(value, "lf"))
595 else if (value && !strcasecmp(value, "crlf"))
597 else if (value && !strcasecmp(value, "native"))
598 core_eol = EOL_NATIVE;
600 core_eol = EOL_UNSET;
601 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
602 return error("core.autocrlf=input conflicts with core.eol=crlf");
606 if (!strcmp(var, "core.notesref")) {
607 notes_ref_name = xstrdup(value);
611 if (!strcmp(var, "core.pager"))
612 return git_config_string(&pager_program, var, value);
614 if (!strcmp(var, "core.editor"))
615 return git_config_string(&editor_program, var, value);
617 if (!strcmp(var, "core.askpass"))
618 return git_config_string(&askpass_program, var, value);
620 if (!strcmp(var, "core.excludesfile"))
621 return git_config_pathname(&excludes_file, var, value);
623 if (!strcmp(var, "core.whitespace")) {
625 return config_error_nonbool(var);
626 whitespace_rule_cfg = parse_whitespace_rule(value);
630 if (!strcmp(var, "core.fsyncobjectfiles")) {
631 fsync_object_files = git_config_bool(var, value);
635 if (!strcmp(var, "core.preloadindex")) {
636 core_preload_index = git_config_bool(var, value);
640 if (!strcmp(var, "core.createobject")) {
641 if (!strcmp(value, "rename"))
642 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
643 else if (!strcmp(value, "link"))
644 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
646 die("Invalid mode for object creation: %s", value);
650 if (!strcmp(var, "core.sparsecheckout")) {
651 core_apply_sparse_checkout = git_config_bool(var, value);
655 /* Add other config variables here and to Documentation/config.txt. */
659 static int git_default_user_config(const char *var, const char *value)
661 if (!strcmp(var, "user.name")) {
663 return config_error_nonbool(var);
664 strlcpy(git_default_name, value, sizeof(git_default_name));
665 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
669 if (!strcmp(var, "user.email")) {
671 return config_error_nonbool(var);
672 strlcpy(git_default_email, value, sizeof(git_default_email));
673 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
677 /* Add other config variables here and to Documentation/config.txt. */
681 static int git_default_i18n_config(const char *var, const char *value)
683 if (!strcmp(var, "i18n.commitencoding"))
684 return git_config_string(&git_commit_encoding, var, value);
686 if (!strcmp(var, "i18n.logoutputencoding"))
687 return git_config_string(&git_log_output_encoding, var, value);
689 /* Add other config variables here and to Documentation/config.txt. */
693 static int git_default_branch_config(const char *var, const char *value)
695 if (!strcmp(var, "branch.autosetupmerge")) {
696 if (value && !strcasecmp(value, "always")) {
697 git_branch_track = BRANCH_TRACK_ALWAYS;
700 git_branch_track = git_config_bool(var, value);
703 if (!strcmp(var, "branch.autosetuprebase")) {
705 return config_error_nonbool(var);
706 else if (!strcmp(value, "never"))
707 autorebase = AUTOREBASE_NEVER;
708 else if (!strcmp(value, "local"))
709 autorebase = AUTOREBASE_LOCAL;
710 else if (!strcmp(value, "remote"))
711 autorebase = AUTOREBASE_REMOTE;
712 else if (!strcmp(value, "always"))
713 autorebase = AUTOREBASE_ALWAYS;
715 return error("Malformed value for %s", var);
719 /* Add other config variables here and to Documentation/config.txt. */
723 static int git_default_push_config(const char *var, const char *value)
725 if (!strcmp(var, "push.default")) {
727 return config_error_nonbool(var);
728 else if (!strcmp(value, "nothing"))
729 push_default = PUSH_DEFAULT_NOTHING;
730 else if (!strcmp(value, "matching"))
731 push_default = PUSH_DEFAULT_MATCHING;
732 else if (!strcmp(value, "upstream"))
733 push_default = PUSH_DEFAULT_UPSTREAM;
734 else if (!strcmp(value, "tracking")) /* deprecated */
735 push_default = PUSH_DEFAULT_UPSTREAM;
736 else if (!strcmp(value, "current"))
737 push_default = PUSH_DEFAULT_CURRENT;
739 error("Malformed value for %s: %s", var, value);
740 return error("Must be one of nothing, matching, "
741 "tracking or current.");
746 /* Add other config variables here and to Documentation/config.txt. */
750 static int git_default_mailmap_config(const char *var, const char *value)
752 if (!strcmp(var, "mailmap.file"))
753 return git_config_string(&git_mailmap_file, var, value);
755 /* Add other config variables here and to Documentation/config.txt. */
759 int git_default_config(const char *var, const char *value, void *dummy)
761 if (!prefixcmp(var, "core."))
762 return git_default_core_config(var, value);
764 if (!prefixcmp(var, "user."))
765 return git_default_user_config(var, value);
767 if (!prefixcmp(var, "i18n."))
768 return git_default_i18n_config(var, value);
770 if (!prefixcmp(var, "branch."))
771 return git_default_branch_config(var, value);
773 if (!prefixcmp(var, "push."))
774 return git_default_push_config(var, value);
776 if (!prefixcmp(var, "mailmap."))
777 return git_default_mailmap_config(var, value);
779 if (!prefixcmp(var, "advice."))
780 return git_default_advice_config(var, value);
782 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
783 pager_use_color = git_config_bool(var,value);
787 /* Add other config variables here and to Documentation/config.txt. */
791 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
794 FILE *f = fopen(filename, "r");
799 config_file_name = filename;
802 ret = git_parse_file(fn, data);
804 config_file_name = NULL;
809 const char *git_etc_gitconfig(void)
811 static const char *system_wide;
813 system_wide = system_path(ETC_GITCONFIG);
817 int git_env_bool(const char *k, int def)
819 const char *v = getenv(k);
820 return v ? git_config_bool(k, v) : def;
823 int git_config_system(void)
825 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
828 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
830 int ret = 0, found = 0;
831 const char *home = NULL;
833 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
834 if (config_exclusive_filename)
835 return git_config_from_file(fn, config_exclusive_filename, data);
836 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
837 ret += git_config_from_file(fn, git_etc_gitconfig(),
842 home = getenv("HOME");
844 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
845 if (!access(user_config, R_OK)) {
846 ret += git_config_from_file(fn, user_config, data);
852 if (repo_config && !access(repo_config, R_OK)) {
853 ret += git_config_from_file(fn, repo_config, data);
857 switch (git_config_from_parameters(fn, data)) {
861 case 0: /* found nothing */
863 default: /* found at least one item */
868 return ret == 0 ? found : ret;
871 int git_config(config_fn_t fn, void *data)
873 char *repo_config = NULL;
876 repo_config = git_pathdup("config");
877 ret = git_config_early(fn, data, repo_config);
884 * Find all the stuff for git_config_set() below.
887 #define MAX_MATCHES 512
893 regex_t *value_regex;
895 size_t offset[MAX_MATCHES];
896 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
900 static int matches(const char *key, const char *value)
902 return !strcmp(key, store.key) &&
903 (store.value_regex == NULL ||
904 (store.do_not_match ^
905 !regexec(store.value_regex, value, 0, NULL, 0)));
908 static int store_aux(const char *key, const char *value, void *cb)
913 switch (store.state) {
915 if (matches(key, value)) {
916 if (store.seen == 1 && store.multi_replace == 0) {
917 warning("%s has multiple values", key);
918 } else if (store.seen >= MAX_MATCHES) {
919 error("too many matches for %s", key);
923 store.offset[store.seen] = ftell(config_file);
929 * What we are looking for is in store.key (both
930 * section and var), and its section part is baselen
931 * long. We found key (again, both section and var).
932 * We would want to know if this key is in the same
933 * section as what we are looking for. We already
934 * know we are in the same section as what should
937 ep = strrchr(key, '.');
938 section_len = ep - key;
940 if ((section_len != store.baselen) ||
941 memcmp(key, store.key, section_len+1)) {
942 store.state = SECTION_END_SEEN;
947 * Do not increment matches: this is no match, but we
948 * just made sure we are in the desired section.
950 store.offset[store.seen] = ftell(config_file);
952 case SECTION_END_SEEN:
954 if (matches(key, value)) {
955 store.offset[store.seen] = ftell(config_file);
956 store.state = KEY_SEEN;
959 if (strrchr(key, '.') - key == store.baselen &&
960 !strncmp(key, store.key, store.baselen)) {
961 store.state = SECTION_SEEN;
962 store.offset[store.seen] = ftell(config_file);
969 static int write_error(const char *filename)
971 error("failed to write new configuration file %s", filename);
973 /* Same error code as "failed to rename". */
977 static int store_write_section(int fd, const char *key)
981 struct strbuf sb = STRBUF_INIT;
983 dot = memchr(key, '.', store.baselen);
985 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
986 for (i = dot - key + 1; i < store.baselen; i++) {
987 if (key[i] == '"' || key[i] == '\\')
988 strbuf_addch(&sb, '\\');
989 strbuf_addch(&sb, key[i]);
991 strbuf_addstr(&sb, "\"]\n");
993 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
996 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1002 static int store_write_pair(int fd, const char *key, const char *value)
1005 int length = strlen(key + store.baselen + 1);
1006 const char *quote = "";
1007 struct strbuf sb = STRBUF_INIT;
1010 * Check to see if the value needs to be surrounded with a dq pair.
1011 * Note that problematic characters are always backslash-quoted; this
1012 * check is about not losing leading or trailing SP and strings that
1013 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1014 * configuration parser.
1016 if (value[0] == ' ')
1018 for (i = 0; value[i]; i++)
1019 if (value[i] == ';' || value[i] == '#')
1021 if (i && value[i - 1] == ' ')
1024 strbuf_addf(&sb, "\t%.*s = %s",
1025 length, key + store.baselen + 1, quote);
1027 for (i = 0; value[i]; i++)
1030 strbuf_addstr(&sb, "\\n");
1033 strbuf_addstr(&sb, "\\t");
1037 strbuf_addch(&sb, '\\');
1039 strbuf_addch(&sb, value[i]);
1042 strbuf_addf(&sb, "%s\n", quote);
1044 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1045 strbuf_release(&sb);
1050 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1051 size_t offset_, int *found_bracket)
1053 size_t equal_offset = size, bracket_offset = size;
1057 for (offset = offset_-2; offset > 0
1058 && contents[offset] != '\n'; offset--)
1059 switch (contents[offset]) {
1060 case '=': equal_offset = offset; break;
1061 case ']': bracket_offset = offset; break;
1063 if (offset > 0 && contents[offset-1] == '\\') {
1067 if (bracket_offset < equal_offset) {
1069 offset = bracket_offset+1;
1076 int git_config_set(const char *key, const char *value)
1078 return git_config_set_multivar(key, value, NULL, 0);
1082 * Auxiliary function to sanity-check and split the key into the section
1083 * identifier and variable name.
1085 * Returns 0 on success, -1 when there is an invalid character in the key and
1086 * -2 if there is no section name in the key.
1088 * store_key - pointer to char* which will hold a copy of the key with
1089 * lowercase section and variable name
1090 * baselen - pointer to int which will hold the length of the
1091 * section + subsection part, can be NULL
1093 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1095 int i, dot, baselen;
1096 const char *last_dot = strrchr(key, '.');
1099 * Since "key" actually contains the section name and the real
1100 * key name separated by a dot, we have to know where the dot is.
1103 if (last_dot == NULL || last_dot == key) {
1104 error("key does not contain a section: %s", key);
1105 return -CONFIG_NO_SECTION_OR_NAME;
1109 error("key does not contain variable name: %s", key);
1110 return -CONFIG_NO_SECTION_OR_NAME;
1113 baselen = last_dot - key;
1115 *baselen_ = baselen;
1118 * Validate the key and while at it, lower case it for matching.
1120 *store_key = xmalloc(strlen(key) + 1);
1123 for (i = 0; key[i]; i++) {
1124 unsigned char c = key[i];
1127 /* Leave the extended basename untouched.. */
1128 if (!dot || i > baselen) {
1129 if (!iskeychar(c) ||
1130 (i == baselen + 1 && !isalpha(c))) {
1131 error("invalid key: %s", key);
1132 goto out_free_ret_1;
1135 } else if (c == '\n') {
1136 error("invalid key (newline): %s", key);
1137 goto out_free_ret_1;
1139 (*store_key)[i] = c;
1141 (*store_key)[i] = 0;
1147 return -CONFIG_INVALID_KEY;
1151 * If value==NULL, unset in (remove from) config,
1152 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1153 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1154 * else all matching key/values (regardless how many) are removed,
1155 * before the new pair is written.
1157 * Returns 0 on success.
1159 * This function does this:
1161 * - it locks the config file by creating ".git/config.lock"
1163 * - it then parses the config using store_aux() as validator to find
1164 * the position on the key/value pair to replace. If it is to be unset,
1165 * it must be found exactly once.
1167 * - the config file is mmap()ed and the part before the match (if any) is
1168 * written to the lock file, then the changed part and the rest.
1170 * - the config file is removed and the lock file rename()d to it.
1173 int git_config_set_multivar(const char *key, const char *value,
1174 const char *value_regex, int multi_replace)
1178 char *config_filename;
1179 struct lock_file *lock = NULL;
1181 if (config_exclusive_filename)
1182 config_filename = xstrdup(config_exclusive_filename);
1184 config_filename = git_pathdup("config");
1186 /* parse-key returns negative; flip the sign to feed exit(3) */
1187 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1191 store.multi_replace = multi_replace;
1195 * The lock serves a purpose in addition to locking: the new
1196 * contents of .git/config will be written into it.
1198 lock = xcalloc(sizeof(struct lock_file), 1);
1199 fd = hold_lock_file_for_update(lock, config_filename, 0);
1201 error("could not lock config file %s: %s", config_filename, strerror(errno));
1203 ret = CONFIG_NO_LOCK;
1208 * If .git/config does not exist yet, write a minimal version.
1210 in_fd = open(config_filename, O_RDONLY);
1214 if ( ENOENT != errno ) {
1215 error("opening %s: %s", config_filename,
1217 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1220 /* if nothing to unset, error out */
1221 if (value == NULL) {
1222 ret = CONFIG_NOTHING_SET;
1226 store.key = (char *)key;
1227 if (!store_write_section(fd, key) ||
1228 !store_write_pair(fd, key, value))
1233 size_t contents_sz, copy_begin, copy_end;
1234 int i, new_line = 0;
1236 if (value_regex == NULL)
1237 store.value_regex = NULL;
1239 if (value_regex[0] == '!') {
1240 store.do_not_match = 1;
1243 store.do_not_match = 0;
1245 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1246 if (regcomp(store.value_regex, value_regex,
1248 error("invalid pattern: %s", value_regex);
1249 free(store.value_regex);
1250 ret = CONFIG_INVALID_PATTERN;
1255 store.offset[0] = 0;
1256 store.state = START;
1260 * After this, store.offset will contain the *end* offset
1261 * of the last match, or remain at 0 if no match was found.
1262 * As a side effect, we make sure to transform only a valid
1263 * existing config file.
1265 if (git_config_from_file(store_aux, config_filename, NULL)) {
1266 error("invalid config file %s", config_filename);
1268 if (store.value_regex != NULL) {
1269 regfree(store.value_regex);
1270 free(store.value_regex);
1272 ret = CONFIG_INVALID_FILE;
1277 if (store.value_regex != NULL) {
1278 regfree(store.value_regex);
1279 free(store.value_regex);
1282 /* if nothing to unset, or too many matches, error out */
1283 if ((store.seen == 0 && value == NULL) ||
1284 (store.seen > 1 && multi_replace == 0)) {
1285 ret = CONFIG_NOTHING_SET;
1290 contents_sz = xsize_t(st.st_size);
1291 contents = xmmap(NULL, contents_sz, PROT_READ,
1292 MAP_PRIVATE, in_fd, 0);
1295 if (store.seen == 0)
1298 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1299 if (store.offset[i] == 0) {
1300 store.offset[i] = copy_end = contents_sz;
1301 } else if (store.state != KEY_SEEN) {
1302 copy_end = store.offset[i];
1304 copy_end = find_beginning_of_line(
1305 contents, contents_sz,
1306 store.offset[i]-2, &new_line);
1308 if (copy_end > 0 && contents[copy_end-1] != '\n')
1311 /* write the first part of the config */
1312 if (copy_end > copy_begin) {
1313 if (write_in_full(fd, contents + copy_begin,
1314 copy_end - copy_begin) <
1315 copy_end - copy_begin)
1318 write_str_in_full(fd, "\n") != 1)
1321 copy_begin = store.offset[i];
1324 /* write the pair (value == NULL means unset) */
1325 if (value != NULL) {
1326 if (store.state == START) {
1327 if (!store_write_section(fd, key))
1330 if (!store_write_pair(fd, key, value))
1334 /* write the rest of the config */
1335 if (copy_begin < contents_sz)
1336 if (write_in_full(fd, contents + copy_begin,
1337 contents_sz - copy_begin) <
1338 contents_sz - copy_begin)
1341 munmap(contents, contents_sz);
1344 if (commit_lock_file(lock) < 0) {
1345 error("could not commit config file %s", config_filename);
1346 ret = CONFIG_NO_WRITE;
1351 * lock is committed, so don't try to roll it back below.
1352 * NOTE: Since lockfile.c keeps a linked list of all created
1353 * lock_file structures, it isn't safe to free(lock). It's
1354 * better to just leave it hanging around.
1361 rollback_lock_file(lock);
1362 free(config_filename);
1366 ret = write_error(lock->filename);
1371 static int section_name_match (const char *buf, const char *name)
1373 int i = 0, j = 0, dot = 0;
1376 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1377 if (!dot && isspace(buf[i])) {
1379 if (name[j++] != '.')
1381 for (i++; isspace(buf[i]); i++)
1387 if (buf[i] == '\\' && dot)
1389 else if (buf[i] == '"' && dot) {
1390 for (i++; isspace(buf[i]); i++)
1394 if (buf[i] != name[j++])
1397 if (buf[i] == ']' && name[j] == 0) {
1399 * We match, now just find the right length offset by
1400 * gobbling up any whitespace after it, as well
1403 for (; buf[i] && isspace(buf[i]); i++)
1410 /* if new_name == NULL, the section is removed instead */
1411 int git_config_rename_section(const char *old_name, const char *new_name)
1413 int ret = 0, remove = 0;
1414 char *config_filename;
1415 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1419 if (config_exclusive_filename)
1420 config_filename = xstrdup(config_exclusive_filename);
1422 config_filename = git_pathdup("config");
1423 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1425 ret = error("could not lock config file %s", config_filename);
1429 if (!(config_file = fopen(config_filename, "rb"))) {
1430 /* no config file means nothing to rename, no error */
1431 goto unlock_and_out;
1434 while (fgets(buf, sizeof(buf), config_file)) {
1438 for (i = 0; buf[i] && isspace(buf[i]); i++)
1440 if (buf[i] == '[') {
1441 /* it's a section */
1442 int offset = section_name_match(&buf[i], old_name);
1445 if (new_name == NULL) {
1449 store.baselen = strlen(new_name);
1450 if (!store_write_section(out_fd, new_name)) {
1451 ret = write_error(lock->filename);
1455 * We wrote out the new section, with
1456 * a newline, now skip the old
1459 output += offset + i;
1460 if (strlen(output) > 0) {
1462 * More content means there's
1463 * a declaration to put on the
1464 * next line; indent with a
1475 length = strlen(output);
1476 if (write_in_full(out_fd, output, length) != length) {
1477 ret = write_error(lock->filename);
1481 fclose(config_file);
1483 if (commit_lock_file(lock) < 0)
1484 ret = error("could not commit config file %s", config_filename);
1486 free(config_filename);
1491 * Call this to report error for your variable that should not
1492 * get a boolean value (i.e. "[my] var" means "true").
1494 int config_error_nonbool(const char *var)
1496 return error("Missing value for '%s'", var);