2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
15 typedef struct config_file {
16 struct config_file *prev;
25 static config_file *cf;
27 static int zlib_compression_seen;
29 const char *config_exclusive_filename = NULL;
31 static void lowercase(char *p)
37 void git_config_push_parameter(const char *text)
39 struct strbuf env = STRBUF_INIT;
40 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
42 strbuf_addstr(&env, old);
43 strbuf_addch(&env, ' ');
45 sq_quote_buf(&env, text);
46 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
50 int git_config_parse_parameter(const char *text,
51 config_fn_t fn, void *data)
54 pair = strbuf_split_str(text, '=', 2);
56 return error("bogus config parameter: %s", text);
57 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
58 strbuf_setlen(pair[0], pair[0]->len - 1);
61 strbuf_list_free(pair);
62 return error("bogus config parameter: %s", text);
64 lowercase(pair[0]->buf);
65 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
66 strbuf_list_free(pair);
69 strbuf_list_free(pair);
73 int git_config_from_parameters(config_fn_t fn, void *data)
75 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
77 const char **argv = NULL;
78 int nr = 0, alloc = 0;
83 /* sq_dequote will write over it */
86 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
88 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
91 for (i = 0; i < nr; i++) {
92 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
104 static int get_next_char(void)
110 if (cf && ((f = cf->f) != NULL)) {
113 /* DOS like systems */
130 static char *parse_value(void)
132 int quote = 0, comment = 0, space = 0;
134 strbuf_reset(&cf->value);
136 int c = get_next_char();
142 return cf->value.buf;
146 if (isspace(c) && !quote) {
152 if (c == ';' || c == '#') {
157 for (; space; space--)
158 strbuf_addch(&cf->value, ' ');
173 /* Some characters escape as themselves */
176 /* Reject unknown escape sequences */
180 strbuf_addch(&cf->value, c);
187 strbuf_addch(&cf->value, c);
191 static inline int iskeychar(int c)
193 return isalnum(c) || c == '-';
196 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
201 /* Get the full name */
208 name[len++] = tolower(c);
213 while (c == ' ' || c == '\t')
220 value = parse_value();
224 return fn(name, value, data);
227 static int get_extended_base_var(char *name, int baselen, int c)
231 goto error_incomplete_line;
233 } while (isspace(c));
235 /* We require the format to be '[base "extension"]' */
238 name[baselen++] = '.';
241 int c = get_next_char();
243 goto error_incomplete_line;
249 goto error_incomplete_line;
252 if (baselen > MAXNAME / 2)
257 if (get_next_char() != ']')
260 error_incomplete_line:
265 static int get_base_var(char *name)
270 int c = get_next_char();
276 return get_extended_base_var(name, baselen, c);
277 if (!iskeychar(c) && c != '.')
279 if (baselen > MAXNAME / 2)
281 name[baselen++] = tolower(c);
285 static int git_parse_file(config_fn_t fn, void *data)
291 /* U+FEFF Byte Order Mark in UTF8 */
292 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
293 const unsigned char *bomptr = utf8_bom;
296 int c = get_next_char();
297 if (bomptr && *bomptr) {
298 /* We are at the file beginning; skip UTF8-encoded BOM
299 * if present. Sane editors won't put this in on their
300 * own, but e.g. Windows Notepad will do it happily. */
301 if ((unsigned char) c == *bomptr) {
305 /* Do not tolerate partial BOM. */
306 if (bomptr != utf8_bom)
308 /* No BOM at file beginning. Cool. */
318 if (comment || isspace(c))
320 if (c == '#' || c == ';') {
325 baselen = get_base_var(var);
328 var[baselen++] = '.';
334 var[baselen] = tolower(c);
335 if (get_value(fn, data, var, baselen+1) < 0)
338 die("bad config file line %d in %s", cf->linenr, cf->name);
341 static int parse_unit_factor(const char *end, unsigned long *val)
345 else if (!strcasecmp(end, "k")) {
349 else if (!strcasecmp(end, "m")) {
353 else if (!strcasecmp(end, "g")) {
354 *val *= 1024 * 1024 * 1024;
360 static int git_parse_long(const char *value, long *ret)
362 if (value && *value) {
364 long val = strtol(value, &end, 0);
365 unsigned long factor = 1;
366 if (!parse_unit_factor(end, &factor))
374 int git_parse_ulong(const char *value, unsigned long *ret)
376 if (value && *value) {
378 unsigned long val = strtoul(value, &end, 0);
379 if (!parse_unit_factor(end, &val))
387 static void die_bad_config(const char *name)
390 die("bad config value for '%s' in %s", name, cf->name);
391 die("bad config value for '%s'", name);
394 int git_config_int(const char *name, const char *value)
397 if (!git_parse_long(value, &ret))
398 die_bad_config(name);
402 unsigned long git_config_ulong(const char *name, const char *value)
405 if (!git_parse_ulong(value, &ret))
406 die_bad_config(name);
410 static int git_config_maybe_bool_text(const char *name, const char *value)
416 if (!strcasecmp(value, "true")
417 || !strcasecmp(value, "yes")
418 || !strcasecmp(value, "on"))
420 if (!strcasecmp(value, "false")
421 || !strcasecmp(value, "no")
422 || !strcasecmp(value, "off"))
427 int git_config_maybe_bool(const char *name, const char *value)
429 long v = git_config_maybe_bool_text(name, value);
432 if (git_parse_long(value, &v))
437 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
439 int v = git_config_maybe_bool_text(name, value);
445 return git_config_int(name, value);
448 int git_config_bool(const char *name, const char *value)
451 return !!git_config_bool_or_int(name, value, &discard);
454 int git_config_string(const char **dest, const char *var, const char *value)
457 return config_error_nonbool(var);
458 *dest = xstrdup(value);
462 int git_config_pathname(const char **dest, const char *var, const char *value)
465 return config_error_nonbool(var);
466 *dest = expand_user_path(value);
468 die("Failed to expand user dir in: '%s'", value);
472 static int git_default_core_config(const char *var, const char *value)
474 /* This needs a better name */
475 if (!strcmp(var, "core.filemode")) {
476 trust_executable_bit = git_config_bool(var, value);
479 if (!strcmp(var, "core.trustctime")) {
480 trust_ctime = git_config_bool(var, value);
484 if (!strcmp(var, "core.quotepath")) {
485 quote_path_fully = git_config_bool(var, value);
489 if (!strcmp(var, "core.symlinks")) {
490 has_symlinks = git_config_bool(var, value);
494 if (!strcmp(var, "core.ignorecase")) {
495 ignore_case = git_config_bool(var, value);
499 if (!strcmp(var, "core.attributesfile"))
500 return git_config_pathname(&git_attributes_file, var, value);
502 if (!strcmp(var, "core.bare")) {
503 is_bare_repository_cfg = git_config_bool(var, value);
507 if (!strcmp(var, "core.ignorestat")) {
508 assume_unchanged = git_config_bool(var, value);
512 if (!strcmp(var, "core.prefersymlinkrefs")) {
513 prefer_symlink_refs = git_config_bool(var, value);
517 if (!strcmp(var, "core.logallrefupdates")) {
518 log_all_ref_updates = git_config_bool(var, value);
522 if (!strcmp(var, "core.warnambiguousrefs")) {
523 warn_ambiguous_refs = git_config_bool(var, value);
527 if (!strcmp(var, "core.abbrev")) {
528 int abbrev = git_config_int(var, value);
529 if (abbrev < minimum_abbrev || abbrev > 40)
531 default_abbrev = abbrev;
535 if (!strcmp(var, "core.loosecompression")) {
536 int level = git_config_int(var, value);
538 level = Z_DEFAULT_COMPRESSION;
539 else if (level < 0 || level > Z_BEST_COMPRESSION)
540 die("bad zlib compression level %d", level);
541 zlib_compression_level = level;
542 zlib_compression_seen = 1;
546 if (!strcmp(var, "core.compression")) {
547 int level = git_config_int(var, value);
549 level = Z_DEFAULT_COMPRESSION;
550 else if (level < 0 || level > Z_BEST_COMPRESSION)
551 die("bad zlib compression level %d", level);
552 core_compression_level = level;
553 core_compression_seen = 1;
554 if (!zlib_compression_seen)
555 zlib_compression_level = level;
559 if (!strcmp(var, "core.packedgitwindowsize")) {
560 int pgsz_x2 = getpagesize() * 2;
561 packed_git_window_size = git_config_int(var, value);
563 /* This value must be multiple of (pagesize * 2) */
564 packed_git_window_size /= pgsz_x2;
565 if (packed_git_window_size < 1)
566 packed_git_window_size = 1;
567 packed_git_window_size *= pgsz_x2;
571 if (!strcmp(var, "core.bigfilethreshold")) {
572 long n = git_config_int(var, value);
573 big_file_threshold = 0 < n ? n : 0;
577 if (!strcmp(var, "core.packedgitlimit")) {
578 packed_git_limit = git_config_int(var, value);
582 if (!strcmp(var, "core.deltabasecachelimit")) {
583 delta_base_cache_limit = git_config_int(var, value);
587 if (!strcmp(var, "core.logpackaccess"))
588 return git_config_string(&log_pack_access, var, value);
590 if (!strcmp(var, "core.autocrlf")) {
591 if (value && !strcasecmp(value, "input")) {
592 if (core_eol == EOL_CRLF)
593 return error("core.autocrlf=input conflicts with core.eol=crlf");
594 auto_crlf = AUTO_CRLF_INPUT;
597 auto_crlf = git_config_bool(var, value);
601 if (!strcmp(var, "core.safecrlf")) {
602 if (value && !strcasecmp(value, "warn")) {
603 safe_crlf = SAFE_CRLF_WARN;
606 safe_crlf = git_config_bool(var, value);
610 if (!strcmp(var, "core.eol")) {
611 if (value && !strcasecmp(value, "lf"))
613 else if (value && !strcasecmp(value, "crlf"))
615 else if (value && !strcasecmp(value, "native"))
616 core_eol = EOL_NATIVE;
618 core_eol = EOL_UNSET;
619 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
620 return error("core.autocrlf=input conflicts with core.eol=crlf");
624 if (!strcmp(var, "core.notesref")) {
625 notes_ref_name = xstrdup(value);
629 if (!strcmp(var, "core.pager"))
630 return git_config_string(&pager_program, var, value);
632 if (!strcmp(var, "core.editor"))
633 return git_config_string(&editor_program, var, value);
635 if (!strcmp(var, "core.askpass"))
636 return git_config_string(&askpass_program, var, value);
638 if (!strcmp(var, "core.excludesfile"))
639 return git_config_pathname(&excludes_file, var, value);
641 if (!strcmp(var, "core.whitespace")) {
643 return config_error_nonbool(var);
644 whitespace_rule_cfg = parse_whitespace_rule(value);
648 if (!strcmp(var, "core.fsyncobjectfiles")) {
649 fsync_object_files = git_config_bool(var, value);
653 if (!strcmp(var, "core.preloadindex")) {
654 core_preload_index = git_config_bool(var, value);
658 if (!strcmp(var, "core.createobject")) {
659 if (!strcmp(value, "rename"))
660 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
661 else if (!strcmp(value, "link"))
662 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
664 die("Invalid mode for object creation: %s", value);
668 if (!strcmp(var, "core.sparsecheckout")) {
669 core_apply_sparse_checkout = git_config_bool(var, value);
673 /* Add other config variables here and to Documentation/config.txt. */
677 static int git_default_user_config(const char *var, const char *value)
679 if (!strcmp(var, "user.name")) {
681 return config_error_nonbool(var);
682 strlcpy(git_default_name, value, sizeof(git_default_name));
683 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
687 if (!strcmp(var, "user.email")) {
689 return config_error_nonbool(var);
690 strlcpy(git_default_email, value, sizeof(git_default_email));
691 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
695 /* Add other config variables here and to Documentation/config.txt. */
699 static int git_default_i18n_config(const char *var, const char *value)
701 if (!strcmp(var, "i18n.commitencoding"))
702 return git_config_string(&git_commit_encoding, var, value);
704 if (!strcmp(var, "i18n.logoutputencoding"))
705 return git_config_string(&git_log_output_encoding, var, value);
707 /* Add other config variables here and to Documentation/config.txt. */
711 static int git_default_branch_config(const char *var, const char *value)
713 if (!strcmp(var, "branch.autosetupmerge")) {
714 if (value && !strcasecmp(value, "always")) {
715 git_branch_track = BRANCH_TRACK_ALWAYS;
718 git_branch_track = git_config_bool(var, value);
721 if (!strcmp(var, "branch.autosetuprebase")) {
723 return config_error_nonbool(var);
724 else if (!strcmp(value, "never"))
725 autorebase = AUTOREBASE_NEVER;
726 else if (!strcmp(value, "local"))
727 autorebase = AUTOREBASE_LOCAL;
728 else if (!strcmp(value, "remote"))
729 autorebase = AUTOREBASE_REMOTE;
730 else if (!strcmp(value, "always"))
731 autorebase = AUTOREBASE_ALWAYS;
733 return error("Malformed value for %s", var);
737 /* Add other config variables here and to Documentation/config.txt. */
741 static int git_default_push_config(const char *var, const char *value)
743 if (!strcmp(var, "push.default")) {
745 return config_error_nonbool(var);
746 else if (!strcmp(value, "nothing"))
747 push_default = PUSH_DEFAULT_NOTHING;
748 else if (!strcmp(value, "matching"))
749 push_default = PUSH_DEFAULT_MATCHING;
750 else if (!strcmp(value, "upstream"))
751 push_default = PUSH_DEFAULT_UPSTREAM;
752 else if (!strcmp(value, "tracking")) /* deprecated */
753 push_default = PUSH_DEFAULT_UPSTREAM;
754 else if (!strcmp(value, "current"))
755 push_default = PUSH_DEFAULT_CURRENT;
757 error("Malformed value for %s: %s", var, value);
758 return error("Must be one of nothing, matching, "
759 "tracking or current.");
764 /* Add other config variables here and to Documentation/config.txt. */
768 static int git_default_mailmap_config(const char *var, const char *value)
770 if (!strcmp(var, "mailmap.file"))
771 return git_config_string(&git_mailmap_file, var, value);
773 /* Add other config variables here and to Documentation/config.txt. */
777 int git_default_config(const char *var, const char *value, void *dummy)
779 if (!prefixcmp(var, "core."))
780 return git_default_core_config(var, value);
782 if (!prefixcmp(var, "user."))
783 return git_default_user_config(var, value);
785 if (!prefixcmp(var, "i18n."))
786 return git_default_i18n_config(var, value);
788 if (!prefixcmp(var, "branch."))
789 return git_default_branch_config(var, value);
791 if (!prefixcmp(var, "push."))
792 return git_default_push_config(var, value);
794 if (!prefixcmp(var, "mailmap."))
795 return git_default_mailmap_config(var, value);
797 if (!prefixcmp(var, "advice."))
798 return git_default_advice_config(var, value);
800 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
801 pager_use_color = git_config_bool(var,value);
805 /* Add other config variables here and to Documentation/config.txt. */
809 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
812 FILE *f = fopen(filename, "r");
818 /* push config-file parsing state stack */
824 strbuf_init(&top.value, 1024);
827 ret = git_parse_file(fn, data);
829 /* pop config-file parsing state stack */
830 strbuf_release(&top.value);
838 const char *git_etc_gitconfig(void)
840 static const char *system_wide;
842 system_wide = system_path(ETC_GITCONFIG);
846 int git_env_bool(const char *k, int def)
848 const char *v = getenv(k);
849 return v ? git_config_bool(k, v) : def;
852 int git_config_system(void)
854 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
857 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
859 int ret = 0, found = 0;
860 const char *home = NULL;
862 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
863 if (config_exclusive_filename)
864 return git_config_from_file(fn, config_exclusive_filename, data);
865 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
866 ret += git_config_from_file(fn, git_etc_gitconfig(),
871 home = getenv("HOME");
873 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
874 if (!access(user_config, R_OK)) {
875 ret += git_config_from_file(fn, user_config, data);
881 if (repo_config && !access(repo_config, R_OK)) {
882 ret += git_config_from_file(fn, repo_config, data);
886 switch (git_config_from_parameters(fn, data)) {
888 die("unable to parse command-line config");
890 case 0: /* found nothing */
892 default: /* found at least one item */
897 return ret == 0 ? found : ret;
900 int git_config(config_fn_t fn, void *data)
902 char *repo_config = NULL;
905 repo_config = git_pathdup("config");
906 ret = git_config_early(fn, data, repo_config);
913 * Find all the stuff for git_config_set() below.
916 #define MAX_MATCHES 512
922 regex_t *value_regex;
924 size_t offset[MAX_MATCHES];
925 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
929 static int matches(const char *key, const char *value)
931 return !strcmp(key, store.key) &&
932 (store.value_regex == NULL ||
933 (store.do_not_match ^
934 !regexec(store.value_regex, value, 0, NULL, 0)));
937 static int store_aux(const char *key, const char *value, void *cb)
943 switch (store.state) {
945 if (matches(key, value)) {
946 if (store.seen == 1 && store.multi_replace == 0) {
947 warning("%s has multiple values", key);
948 } else if (store.seen >= MAX_MATCHES) {
949 error("too many matches for %s", key);
953 store.offset[store.seen] = ftell(f);
959 * What we are looking for is in store.key (both
960 * section and var), and its section part is baselen
961 * long. We found key (again, both section and var).
962 * We would want to know if this key is in the same
963 * section as what we are looking for. We already
964 * know we are in the same section as what should
967 ep = strrchr(key, '.');
968 section_len = ep - key;
970 if ((section_len != store.baselen) ||
971 memcmp(key, store.key, section_len+1)) {
972 store.state = SECTION_END_SEEN;
977 * Do not increment matches: this is no match, but we
978 * just made sure we are in the desired section.
980 store.offset[store.seen] = ftell(f);
982 case SECTION_END_SEEN:
984 if (matches(key, value)) {
985 store.offset[store.seen] = ftell(f);
986 store.state = KEY_SEEN;
989 if (strrchr(key, '.') - key == store.baselen &&
990 !strncmp(key, store.key, store.baselen)) {
991 store.state = SECTION_SEEN;
992 store.offset[store.seen] = ftell(f);
999 static int write_error(const char *filename)
1001 error("failed to write new configuration file %s", filename);
1003 /* Same error code as "failed to rename". */
1007 static int store_write_section(int fd, const char *key)
1011 struct strbuf sb = STRBUF_INIT;
1013 dot = memchr(key, '.', store.baselen);
1015 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1016 for (i = dot - key + 1; i < store.baselen; i++) {
1017 if (key[i] == '"' || key[i] == '\\')
1018 strbuf_addch(&sb, '\\');
1019 strbuf_addch(&sb, key[i]);
1021 strbuf_addstr(&sb, "\"]\n");
1023 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1026 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1027 strbuf_release(&sb);
1032 static int store_write_pair(int fd, const char *key, const char *value)
1035 int length = strlen(key + store.baselen + 1);
1036 const char *quote = "";
1037 struct strbuf sb = STRBUF_INIT;
1040 * Check to see if the value needs to be surrounded with a dq pair.
1041 * Note that problematic characters are always backslash-quoted; this
1042 * check is about not losing leading or trailing SP and strings that
1043 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1044 * configuration parser.
1046 if (value[0] == ' ')
1048 for (i = 0; value[i]; i++)
1049 if (value[i] == ';' || value[i] == '#')
1051 if (i && value[i - 1] == ' ')
1054 strbuf_addf(&sb, "\t%.*s = %s",
1055 length, key + store.baselen + 1, quote);
1057 for (i = 0; value[i]; i++)
1060 strbuf_addstr(&sb, "\\n");
1063 strbuf_addstr(&sb, "\\t");
1067 strbuf_addch(&sb, '\\');
1069 strbuf_addch(&sb, value[i]);
1072 strbuf_addf(&sb, "%s\n", quote);
1074 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1075 strbuf_release(&sb);
1080 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1081 size_t offset_, int *found_bracket)
1083 size_t equal_offset = size, bracket_offset = size;
1087 for (offset = offset_-2; offset > 0
1088 && contents[offset] != '\n'; offset--)
1089 switch (contents[offset]) {
1090 case '=': equal_offset = offset; break;
1091 case ']': bracket_offset = offset; break;
1093 if (offset > 0 && contents[offset-1] == '\\') {
1097 if (bracket_offset < equal_offset) {
1099 offset = bracket_offset+1;
1106 int git_config_set(const char *key, const char *value)
1108 return git_config_set_multivar(key, value, NULL, 0);
1112 * Auxiliary function to sanity-check and split the key into the section
1113 * identifier and variable name.
1115 * Returns 0 on success, -1 when there is an invalid character in the key and
1116 * -2 if there is no section name in the key.
1118 * store_key - pointer to char* which will hold a copy of the key with
1119 * lowercase section and variable name
1120 * baselen - pointer to int which will hold the length of the
1121 * section + subsection part, can be NULL
1123 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1125 int i, dot, baselen;
1126 const char *last_dot = strrchr(key, '.');
1129 * Since "key" actually contains the section name and the real
1130 * key name separated by a dot, we have to know where the dot is.
1133 if (last_dot == NULL || last_dot == key) {
1134 error("key does not contain a section: %s", key);
1135 return -CONFIG_NO_SECTION_OR_NAME;
1139 error("key does not contain variable name: %s", key);
1140 return -CONFIG_NO_SECTION_OR_NAME;
1143 baselen = last_dot - key;
1145 *baselen_ = baselen;
1148 * Validate the key and while at it, lower case it for matching.
1150 *store_key = xmalloc(strlen(key) + 1);
1153 for (i = 0; key[i]; i++) {
1154 unsigned char c = key[i];
1157 /* Leave the extended basename untouched.. */
1158 if (!dot || i > baselen) {
1159 if (!iskeychar(c) ||
1160 (i == baselen + 1 && !isalpha(c))) {
1161 error("invalid key: %s", key);
1162 goto out_free_ret_1;
1165 } else if (c == '\n') {
1166 error("invalid key (newline): %s", key);
1167 goto out_free_ret_1;
1169 (*store_key)[i] = c;
1171 (*store_key)[i] = 0;
1177 return -CONFIG_INVALID_KEY;
1181 * If value==NULL, unset in (remove from) config,
1182 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1183 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1184 * else all matching key/values (regardless how many) are removed,
1185 * before the new pair is written.
1187 * Returns 0 on success.
1189 * This function does this:
1191 * - it locks the config file by creating ".git/config.lock"
1193 * - it then parses the config using store_aux() as validator to find
1194 * the position on the key/value pair to replace. If it is to be unset,
1195 * it must be found exactly once.
1197 * - the config file is mmap()ed and the part before the match (if any) is
1198 * written to the lock file, then the changed part and the rest.
1200 * - the config file is removed and the lock file rename()d to it.
1203 int git_config_set_multivar(const char *key, const char *value,
1204 const char *value_regex, int multi_replace)
1208 char *config_filename;
1209 struct lock_file *lock = NULL;
1211 if (config_exclusive_filename)
1212 config_filename = xstrdup(config_exclusive_filename);
1214 config_filename = git_pathdup("config");
1216 /* parse-key returns negative; flip the sign to feed exit(3) */
1217 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1221 store.multi_replace = multi_replace;
1225 * The lock serves a purpose in addition to locking: the new
1226 * contents of .git/config will be written into it.
1228 lock = xcalloc(sizeof(struct lock_file), 1);
1229 fd = hold_lock_file_for_update(lock, config_filename, 0);
1231 error("could not lock config file %s: %s", config_filename, strerror(errno));
1233 ret = CONFIG_NO_LOCK;
1238 * If .git/config does not exist yet, write a minimal version.
1240 in_fd = open(config_filename, O_RDONLY);
1244 if ( ENOENT != errno ) {
1245 error("opening %s: %s", config_filename,
1247 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1250 /* if nothing to unset, error out */
1251 if (value == NULL) {
1252 ret = CONFIG_NOTHING_SET;
1256 store.key = (char *)key;
1257 if (!store_write_section(fd, key) ||
1258 !store_write_pair(fd, key, value))
1263 size_t contents_sz, copy_begin, copy_end;
1264 int i, new_line = 0;
1266 if (value_regex == NULL)
1267 store.value_regex = NULL;
1269 if (value_regex[0] == '!') {
1270 store.do_not_match = 1;
1273 store.do_not_match = 0;
1275 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1276 if (regcomp(store.value_regex, value_regex,
1278 error("invalid pattern: %s", value_regex);
1279 free(store.value_regex);
1280 ret = CONFIG_INVALID_PATTERN;
1285 store.offset[0] = 0;
1286 store.state = START;
1290 * After this, store.offset will contain the *end* offset
1291 * of the last match, or remain at 0 if no match was found.
1292 * As a side effect, we make sure to transform only a valid
1293 * existing config file.
1295 if (git_config_from_file(store_aux, config_filename, NULL)) {
1296 error("invalid config file %s", config_filename);
1298 if (store.value_regex != NULL) {
1299 regfree(store.value_regex);
1300 free(store.value_regex);
1302 ret = CONFIG_INVALID_FILE;
1307 if (store.value_regex != NULL) {
1308 regfree(store.value_regex);
1309 free(store.value_regex);
1312 /* if nothing to unset, or too many matches, error out */
1313 if ((store.seen == 0 && value == NULL) ||
1314 (store.seen > 1 && multi_replace == 0)) {
1315 ret = CONFIG_NOTHING_SET;
1320 contents_sz = xsize_t(st.st_size);
1321 contents = xmmap(NULL, contents_sz, PROT_READ,
1322 MAP_PRIVATE, in_fd, 0);
1325 if (store.seen == 0)
1328 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1329 if (store.offset[i] == 0) {
1330 store.offset[i] = copy_end = contents_sz;
1331 } else if (store.state != KEY_SEEN) {
1332 copy_end = store.offset[i];
1334 copy_end = find_beginning_of_line(
1335 contents, contents_sz,
1336 store.offset[i]-2, &new_line);
1338 if (copy_end > 0 && contents[copy_end-1] != '\n')
1341 /* write the first part of the config */
1342 if (copy_end > copy_begin) {
1343 if (write_in_full(fd, contents + copy_begin,
1344 copy_end - copy_begin) <
1345 copy_end - copy_begin)
1348 write_str_in_full(fd, "\n") != 1)
1351 copy_begin = store.offset[i];
1354 /* write the pair (value == NULL means unset) */
1355 if (value != NULL) {
1356 if (store.state == START) {
1357 if (!store_write_section(fd, key))
1360 if (!store_write_pair(fd, key, value))
1364 /* write the rest of the config */
1365 if (copy_begin < contents_sz)
1366 if (write_in_full(fd, contents + copy_begin,
1367 contents_sz - copy_begin) <
1368 contents_sz - copy_begin)
1371 munmap(contents, contents_sz);
1374 if (commit_lock_file(lock) < 0) {
1375 error("could not commit config file %s", config_filename);
1376 ret = CONFIG_NO_WRITE;
1381 * lock is committed, so don't try to roll it back below.
1382 * NOTE: Since lockfile.c keeps a linked list of all created
1383 * lock_file structures, it isn't safe to free(lock). It's
1384 * better to just leave it hanging around.
1391 rollback_lock_file(lock);
1392 free(config_filename);
1396 ret = write_error(lock->filename);
1401 static int section_name_match (const char *buf, const char *name)
1403 int i = 0, j = 0, dot = 0;
1406 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1407 if (!dot && isspace(buf[i])) {
1409 if (name[j++] != '.')
1411 for (i++; isspace(buf[i]); i++)
1417 if (buf[i] == '\\' && dot)
1419 else if (buf[i] == '"' && dot) {
1420 for (i++; isspace(buf[i]); i++)
1424 if (buf[i] != name[j++])
1427 if (buf[i] == ']' && name[j] == 0) {
1429 * We match, now just find the right length offset by
1430 * gobbling up any whitespace after it, as well
1433 for (; buf[i] && isspace(buf[i]); i++)
1440 /* if new_name == NULL, the section is removed instead */
1441 int git_config_rename_section(const char *old_name, const char *new_name)
1443 int ret = 0, remove = 0;
1444 char *config_filename;
1445 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1450 if (config_exclusive_filename)
1451 config_filename = xstrdup(config_exclusive_filename);
1453 config_filename = git_pathdup("config");
1454 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1456 ret = error("could not lock config file %s", config_filename);
1460 if (!(config_file = fopen(config_filename, "rb"))) {
1461 /* no config file means nothing to rename, no error */
1462 goto unlock_and_out;
1465 while (fgets(buf, sizeof(buf), config_file)) {
1469 for (i = 0; buf[i] && isspace(buf[i]); i++)
1471 if (buf[i] == '[') {
1472 /* it's a section */
1473 int offset = section_name_match(&buf[i], old_name);
1476 if (new_name == NULL) {
1480 store.baselen = strlen(new_name);
1481 if (!store_write_section(out_fd, new_name)) {
1482 ret = write_error(lock->filename);
1486 * We wrote out the new section, with
1487 * a newline, now skip the old
1490 output += offset + i;
1491 if (strlen(output) > 0) {
1493 * More content means there's
1494 * a declaration to put on the
1495 * next line; indent with a
1506 length = strlen(output);
1507 if (write_in_full(out_fd, output, length) != length) {
1508 ret = write_error(lock->filename);
1512 fclose(config_file);
1514 if (commit_lock_file(lock) < 0)
1515 ret = error("could not commit config file %s", config_filename);
1517 free(config_filename);
1522 * Call this to report error for your variable that should not
1523 * get a boolean value (i.e. "[my] var" means "true").
1525 int config_error_nonbool(const char *var)
1527 return error("Missing value for '%s'", var);