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 #define MAX_INCLUDE_DEPTH 10
30 static const char include_depth_advice[] =
31 "exceeded maximum include depth (%d) while including\n"
35 "Do you have circular includes?";
36 static int handle_path_include(const char *path, struct config_include_data *inc)
39 struct strbuf buf = STRBUF_INIT;
40 char *expanded = expand_user_path(path);
43 return error("Could not expand include path '%s'", path);
47 * Use an absolute path as-is, but interpret relative paths
48 * based on the including config file.
50 if (!is_absolute_path(path)) {
54 return error("relative config includes must come from files");
56 slash = find_last_dir_sep(cf->name);
58 strbuf_add(&buf, cf->name, slash - cf->name + 1);
59 strbuf_addstr(&buf, path);
63 if (!access(path, R_OK)) {
64 if (++inc->depth > MAX_INCLUDE_DEPTH)
65 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
66 cf && cf->name ? cf->name : "the command line");
67 ret = git_config_from_file(git_config_include, path, inc);
75 int git_config_include(const char *var, const char *value, void *data)
77 struct config_include_data *inc = data;
82 * Pass along all values, including "include" directives; this makes it
83 * possible to query information on the includes themselves.
85 ret = inc->fn(var, value, inc->data);
89 type = skip_prefix(var, "include.");
93 if (!strcmp(type, "path"))
94 ret = handle_path_include(value, inc);
98 static void lowercase(char *p)
104 void git_config_push_parameter(const char *text)
106 struct strbuf env = STRBUF_INIT;
107 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
109 strbuf_addstr(&env, old);
110 strbuf_addch(&env, ' ');
112 sq_quote_buf(&env, text);
113 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
114 strbuf_release(&env);
117 int git_config_parse_parameter(const char *text,
118 config_fn_t fn, void *data)
120 struct strbuf **pair;
121 pair = strbuf_split_str(text, '=', 2);
123 return error("bogus config parameter: %s", text);
124 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
125 strbuf_setlen(pair[0], pair[0]->len - 1);
126 strbuf_trim(pair[0]);
128 strbuf_list_free(pair);
129 return error("bogus config parameter: %s", text);
131 lowercase(pair[0]->buf);
132 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
133 strbuf_list_free(pair);
136 strbuf_list_free(pair);
140 int git_config_from_parameters(config_fn_t fn, void *data)
142 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
144 const char **argv = NULL;
145 int nr = 0, alloc = 0;
150 /* sq_dequote will write over it */
153 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
155 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
158 for (i = 0; i < nr; i++) {
159 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
171 static int get_next_char(void)
177 if (cf && ((f = cf->f) != NULL)) {
180 /* DOS like systems */
197 static char *parse_value(void)
199 int quote = 0, comment = 0, space = 0;
201 strbuf_reset(&cf->value);
203 int c = get_next_char();
209 return cf->value.buf;
213 if (isspace(c) && !quote) {
219 if (c == ';' || c == '#') {
224 for (; space; space--)
225 strbuf_addch(&cf->value, ' ');
240 /* Some characters escape as themselves */
243 /* Reject unknown escape sequences */
247 strbuf_addch(&cf->value, c);
254 strbuf_addch(&cf->value, c);
258 static inline int iskeychar(int c)
260 return isalnum(c) || c == '-';
263 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
268 /* Get the full name */
275 name[len++] = tolower(c);
280 while (c == ' ' || c == '\t')
287 value = parse_value();
291 return fn(name, value, data);
294 static int get_extended_base_var(char *name, int baselen, int c)
298 goto error_incomplete_line;
300 } while (isspace(c));
302 /* We require the format to be '[base "extension"]' */
305 name[baselen++] = '.';
308 int c = get_next_char();
310 goto error_incomplete_line;
316 goto error_incomplete_line;
319 if (baselen > MAXNAME / 2)
324 if (get_next_char() != ']')
327 error_incomplete_line:
332 static int get_base_var(char *name)
337 int c = get_next_char();
343 return get_extended_base_var(name, baselen, c);
344 if (!iskeychar(c) && c != '.')
346 if (baselen > MAXNAME / 2)
348 name[baselen++] = tolower(c);
352 static int git_parse_file(config_fn_t fn, void *data)
358 /* U+FEFF Byte Order Mark in UTF8 */
359 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
360 const unsigned char *bomptr = utf8_bom;
363 int c = get_next_char();
364 if (bomptr && *bomptr) {
365 /* We are at the file beginning; skip UTF8-encoded BOM
366 * if present. Sane editors won't put this in on their
367 * own, but e.g. Windows Notepad will do it happily. */
368 if ((unsigned char) c == *bomptr) {
372 /* Do not tolerate partial BOM. */
373 if (bomptr != utf8_bom)
375 /* No BOM at file beginning. Cool. */
385 if (comment || isspace(c))
387 if (c == '#' || c == ';') {
392 baselen = get_base_var(var);
395 var[baselen++] = '.';
401 var[baselen] = tolower(c);
402 if (get_value(fn, data, var, baselen+1) < 0)
405 die("bad config file line %d in %s", cf->linenr, cf->name);
408 static int parse_unit_factor(const char *end, uintmax_t *val)
412 else if (!strcasecmp(end, "k")) {
416 else if (!strcasecmp(end, "m")) {
420 else if (!strcasecmp(end, "g")) {
421 *val *= 1024 * 1024 * 1024;
427 static int git_parse_long(const char *value, long *ret)
429 if (value && *value) {
433 uintmax_t factor = 1;
436 val = strtoimax(value, &end, 0);
439 if (!parse_unit_factor(end, &factor))
443 if ((uval > maximum_signed_value_of_type(long)) ||
453 int git_parse_ulong(const char *value, unsigned long *ret)
455 if (value && *value) {
461 val = strtoumax(value, &end, 0);
465 if (!parse_unit_factor(end, &val))
467 if ((val > maximum_unsigned_value_of_type(long)) ||
476 static void die_bad_config(const char *name)
479 die("bad config value for '%s' in %s", name, cf->name);
480 die("bad config value for '%s'", name);
483 int git_config_int(const char *name, const char *value)
486 if (!git_parse_long(value, &ret))
487 die_bad_config(name);
491 unsigned long git_config_ulong(const char *name, const char *value)
494 if (!git_parse_ulong(value, &ret))
495 die_bad_config(name);
499 static int git_config_maybe_bool_text(const char *name, const char *value)
505 if (!strcasecmp(value, "true")
506 || !strcasecmp(value, "yes")
507 || !strcasecmp(value, "on"))
509 if (!strcasecmp(value, "false")
510 || !strcasecmp(value, "no")
511 || !strcasecmp(value, "off"))
516 int git_config_maybe_bool(const char *name, const char *value)
518 long v = git_config_maybe_bool_text(name, value);
521 if (git_parse_long(value, &v))
526 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
528 int v = git_config_maybe_bool_text(name, value);
534 return git_config_int(name, value);
537 int git_config_bool(const char *name, const char *value)
540 return !!git_config_bool_or_int(name, value, &discard);
543 int git_config_string(const char **dest, const char *var, const char *value)
546 return config_error_nonbool(var);
547 *dest = xstrdup(value);
551 int git_config_pathname(const char **dest, const char *var, const char *value)
554 return config_error_nonbool(var);
555 *dest = expand_user_path(value);
557 die("Failed to expand user dir in: '%s'", value);
561 static int git_default_core_config(const char *var, const char *value)
563 /* This needs a better name */
564 if (!strcmp(var, "core.filemode")) {
565 trust_executable_bit = git_config_bool(var, value);
568 if (!strcmp(var, "core.trustctime")) {
569 trust_ctime = git_config_bool(var, value);
573 if (!strcmp(var, "core.quotepath")) {
574 quote_path_fully = git_config_bool(var, value);
578 if (!strcmp(var, "core.symlinks")) {
579 has_symlinks = git_config_bool(var, value);
583 if (!strcmp(var, "core.ignorecase")) {
584 ignore_case = git_config_bool(var, value);
588 if (!strcmp(var, "core.attributesfile"))
589 return git_config_pathname(&git_attributes_file, var, value);
591 if (!strcmp(var, "core.bare")) {
592 is_bare_repository_cfg = git_config_bool(var, value);
596 if (!strcmp(var, "core.ignorestat")) {
597 assume_unchanged = git_config_bool(var, value);
601 if (!strcmp(var, "core.prefersymlinkrefs")) {
602 prefer_symlink_refs = git_config_bool(var, value);
606 if (!strcmp(var, "core.logallrefupdates")) {
607 log_all_ref_updates = git_config_bool(var, value);
611 if (!strcmp(var, "core.warnambiguousrefs")) {
612 warn_ambiguous_refs = git_config_bool(var, value);
616 if (!strcmp(var, "core.abbrev")) {
617 int abbrev = git_config_int(var, value);
618 if (abbrev < minimum_abbrev || abbrev > 40)
620 default_abbrev = abbrev;
624 if (!strcmp(var, "core.loosecompression")) {
625 int level = git_config_int(var, value);
627 level = Z_DEFAULT_COMPRESSION;
628 else if (level < 0 || level > Z_BEST_COMPRESSION)
629 die("bad zlib compression level %d", level);
630 zlib_compression_level = level;
631 zlib_compression_seen = 1;
635 if (!strcmp(var, "core.compression")) {
636 int level = git_config_int(var, value);
638 level = Z_DEFAULT_COMPRESSION;
639 else if (level < 0 || level > Z_BEST_COMPRESSION)
640 die("bad zlib compression level %d", level);
641 core_compression_level = level;
642 core_compression_seen = 1;
643 if (!zlib_compression_seen)
644 zlib_compression_level = level;
648 if (!strcmp(var, "core.packedgitwindowsize")) {
649 int pgsz_x2 = getpagesize() * 2;
650 packed_git_window_size = git_config_ulong(var, value);
652 /* This value must be multiple of (pagesize * 2) */
653 packed_git_window_size /= pgsz_x2;
654 if (packed_git_window_size < 1)
655 packed_git_window_size = 1;
656 packed_git_window_size *= pgsz_x2;
660 if (!strcmp(var, "core.bigfilethreshold")) {
661 big_file_threshold = git_config_ulong(var, value);
665 if (!strcmp(var, "core.packedgitlimit")) {
666 packed_git_limit = git_config_ulong(var, value);
670 if (!strcmp(var, "core.deltabasecachelimit")) {
671 delta_base_cache_limit = git_config_ulong(var, value);
675 if (!strcmp(var, "core.logpackaccess"))
676 return git_config_string(&log_pack_access, var, value);
678 if (!strcmp(var, "core.autocrlf")) {
679 if (value && !strcasecmp(value, "input")) {
680 if (core_eol == EOL_CRLF)
681 return error("core.autocrlf=input conflicts with core.eol=crlf");
682 auto_crlf = AUTO_CRLF_INPUT;
685 auto_crlf = git_config_bool(var, value);
689 if (!strcmp(var, "core.safecrlf")) {
690 if (value && !strcasecmp(value, "warn")) {
691 safe_crlf = SAFE_CRLF_WARN;
694 safe_crlf = git_config_bool(var, value);
698 if (!strcmp(var, "core.eol")) {
699 if (value && !strcasecmp(value, "lf"))
701 else if (value && !strcasecmp(value, "crlf"))
703 else if (value && !strcasecmp(value, "native"))
704 core_eol = EOL_NATIVE;
706 core_eol = EOL_UNSET;
707 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
708 return error("core.autocrlf=input conflicts with core.eol=crlf");
712 if (!strcmp(var, "core.notesref")) {
713 notes_ref_name = xstrdup(value);
717 if (!strcmp(var, "core.pager"))
718 return git_config_string(&pager_program, var, value);
720 if (!strcmp(var, "core.editor"))
721 return git_config_string(&editor_program, var, value);
723 if (!strcmp(var, "core.askpass"))
724 return git_config_string(&askpass_program, var, value);
726 if (!strcmp(var, "core.excludesfile"))
727 return git_config_pathname(&excludes_file, var, value);
729 if (!strcmp(var, "core.whitespace")) {
731 return config_error_nonbool(var);
732 whitespace_rule_cfg = parse_whitespace_rule(value);
736 if (!strcmp(var, "core.fsyncobjectfiles")) {
737 fsync_object_files = git_config_bool(var, value);
741 if (!strcmp(var, "core.preloadindex")) {
742 core_preload_index = git_config_bool(var, value);
746 if (!strcmp(var, "core.createobject")) {
747 if (!strcmp(value, "rename"))
748 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
749 else if (!strcmp(value, "link"))
750 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
752 die("Invalid mode for object creation: %s", value);
756 if (!strcmp(var, "core.sparsecheckout")) {
757 core_apply_sparse_checkout = git_config_bool(var, value);
761 /* Add other config variables here and to Documentation/config.txt. */
765 static int git_default_user_config(const char *var, const char *value)
767 if (!strcmp(var, "user.name")) {
769 return config_error_nonbool(var);
770 strlcpy(git_default_name, value, sizeof(git_default_name));
771 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
775 if (!strcmp(var, "user.email")) {
777 return config_error_nonbool(var);
778 strlcpy(git_default_email, value, sizeof(git_default_email));
779 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
783 /* Add other config variables here and to Documentation/config.txt. */
787 static int git_default_i18n_config(const char *var, const char *value)
789 if (!strcmp(var, "i18n.commitencoding"))
790 return git_config_string(&git_commit_encoding, var, value);
792 if (!strcmp(var, "i18n.logoutputencoding"))
793 return git_config_string(&git_log_output_encoding, var, value);
795 /* Add other config variables here and to Documentation/config.txt. */
799 static int git_default_branch_config(const char *var, const char *value)
801 if (!strcmp(var, "branch.autosetupmerge")) {
802 if (value && !strcasecmp(value, "always")) {
803 git_branch_track = BRANCH_TRACK_ALWAYS;
806 git_branch_track = git_config_bool(var, value);
809 if (!strcmp(var, "branch.autosetuprebase")) {
811 return config_error_nonbool(var);
812 else if (!strcmp(value, "never"))
813 autorebase = AUTOREBASE_NEVER;
814 else if (!strcmp(value, "local"))
815 autorebase = AUTOREBASE_LOCAL;
816 else if (!strcmp(value, "remote"))
817 autorebase = AUTOREBASE_REMOTE;
818 else if (!strcmp(value, "always"))
819 autorebase = AUTOREBASE_ALWAYS;
821 return error("Malformed value for %s", var);
825 /* Add other config variables here and to Documentation/config.txt. */
829 static int git_default_push_config(const char *var, const char *value)
831 if (!strcmp(var, "push.default")) {
833 return config_error_nonbool(var);
834 else if (!strcmp(value, "nothing"))
835 push_default = PUSH_DEFAULT_NOTHING;
836 else if (!strcmp(value, "matching"))
837 push_default = PUSH_DEFAULT_MATCHING;
838 else if (!strcmp(value, "simple"))
839 push_default = PUSH_DEFAULT_SIMPLE;
840 else if (!strcmp(value, "upstream"))
841 push_default = PUSH_DEFAULT_UPSTREAM;
842 else if (!strcmp(value, "tracking")) /* deprecated */
843 push_default = PUSH_DEFAULT_UPSTREAM;
844 else if (!strcmp(value, "current"))
845 push_default = PUSH_DEFAULT_CURRENT;
847 error("Malformed value for %s: %s", var, value);
848 return error("Must be one of nothing, matching, simple, "
849 "upstream or current.");
854 /* Add other config variables here and to Documentation/config.txt. */
858 static int git_default_mailmap_config(const char *var, const char *value)
860 if (!strcmp(var, "mailmap.file"))
861 return git_config_string(&git_mailmap_file, var, value);
863 /* Add other config variables here and to Documentation/config.txt. */
867 int git_default_config(const char *var, const char *value, void *dummy)
869 if (!prefixcmp(var, "core."))
870 return git_default_core_config(var, value);
872 if (!prefixcmp(var, "user."))
873 return git_default_user_config(var, value);
875 if (!prefixcmp(var, "i18n."))
876 return git_default_i18n_config(var, value);
878 if (!prefixcmp(var, "branch."))
879 return git_default_branch_config(var, value);
881 if (!prefixcmp(var, "push."))
882 return git_default_push_config(var, value);
884 if (!prefixcmp(var, "mailmap."))
885 return git_default_mailmap_config(var, value);
887 if (!prefixcmp(var, "advice."))
888 return git_default_advice_config(var, value);
890 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
891 pager_use_color = git_config_bool(var,value);
895 if (!strcmp(var, "pack.packsizelimit")) {
896 pack_size_limit_cfg = git_config_ulong(var, value);
899 /* Add other config variables here and to Documentation/config.txt. */
903 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
906 FILE *f = fopen(filename, "r");
912 /* push config-file parsing state stack */
918 strbuf_init(&top.value, 1024);
921 ret = git_parse_file(fn, data);
923 /* pop config-file parsing state stack */
924 strbuf_release(&top.value);
932 const char *git_etc_gitconfig(void)
934 static const char *system_wide;
936 system_wide = system_path(ETC_GITCONFIG);
940 int git_env_bool(const char *k, int def)
942 const char *v = getenv(k);
943 return v ? git_config_bool(k, v) : def;
946 int git_config_system(void)
948 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
951 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
953 int ret = 0, found = 0;
954 const char *home = NULL;
956 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
957 ret += git_config_from_file(fn, git_etc_gitconfig(),
962 home = getenv("HOME");
965 char *user_config = mksnpath(buf, sizeof(buf), "%s/.gitconfig", home);
966 if (!access(user_config, R_OK)) {
967 ret += git_config_from_file(fn, user_config, data);
972 if (repo_config && !access(repo_config, R_OK)) {
973 ret += git_config_from_file(fn, repo_config, data);
977 switch (git_config_from_parameters(fn, data)) {
979 die("unable to parse command-line config");
981 case 0: /* found nothing */
983 default: /* found at least one item */
988 return ret == 0 ? found : ret;
991 int git_config_with_options(config_fn_t fn, void *data,
992 const char *filename, int respect_includes)
994 char *repo_config = NULL;
996 struct config_include_data inc = CONFIG_INCLUDE_INIT;
998 if (respect_includes) {
1001 fn = git_config_include;
1006 * If we have a specific filename, use it. Otherwise, follow the
1007 * regular lookup sequence.
1010 return git_config_from_file(fn, filename, data);
1012 repo_config = git_pathdup("config");
1013 ret = git_config_early(fn, data, repo_config);
1019 int git_config(config_fn_t fn, void *data)
1021 return git_config_with_options(fn, data, NULL, 1);
1025 * Find all the stuff for git_config_set() below.
1028 #define MAX_MATCHES 512
1034 regex_t *value_regex;
1036 size_t offset[MAX_MATCHES];
1037 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1041 static int matches(const char *key, const char *value)
1043 return !strcmp(key, store.key) &&
1044 (store.value_regex == NULL ||
1045 (store.do_not_match ^
1046 !regexec(store.value_regex, value, 0, NULL, 0)));
1049 static int store_aux(const char *key, const char *value, void *cb)
1055 switch (store.state) {
1057 if (matches(key, value)) {
1058 if (store.seen == 1 && store.multi_replace == 0) {
1059 warning("%s has multiple values", key);
1060 } else if (store.seen >= MAX_MATCHES) {
1061 error("too many matches for %s", key);
1065 store.offset[store.seen] = ftell(f);
1071 * What we are looking for is in store.key (both
1072 * section and var), and its section part is baselen
1073 * long. We found key (again, both section and var).
1074 * We would want to know if this key is in the same
1075 * section as what we are looking for. We already
1076 * know we are in the same section as what should
1079 ep = strrchr(key, '.');
1080 section_len = ep - key;
1082 if ((section_len != store.baselen) ||
1083 memcmp(key, store.key, section_len+1)) {
1084 store.state = SECTION_END_SEEN;
1089 * Do not increment matches: this is no match, but we
1090 * just made sure we are in the desired section.
1092 store.offset[store.seen] = ftell(f);
1094 case SECTION_END_SEEN:
1096 if (matches(key, value)) {
1097 store.offset[store.seen] = ftell(f);
1098 store.state = KEY_SEEN;
1101 if (strrchr(key, '.') - key == store.baselen &&
1102 !strncmp(key, store.key, store.baselen)) {
1103 store.state = SECTION_SEEN;
1104 store.offset[store.seen] = ftell(f);
1111 static int write_error(const char *filename)
1113 error("failed to write new configuration file %s", filename);
1115 /* Same error code as "failed to rename". */
1119 static int store_write_section(int fd, const char *key)
1123 struct strbuf sb = STRBUF_INIT;
1125 dot = memchr(key, '.', store.baselen);
1127 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1128 for (i = dot - key + 1; i < store.baselen; i++) {
1129 if (key[i] == '"' || key[i] == '\\')
1130 strbuf_addch(&sb, '\\');
1131 strbuf_addch(&sb, key[i]);
1133 strbuf_addstr(&sb, "\"]\n");
1135 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1138 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1139 strbuf_release(&sb);
1144 static int store_write_pair(int fd, const char *key, const char *value)
1147 int length = strlen(key + store.baselen + 1);
1148 const char *quote = "";
1149 struct strbuf sb = STRBUF_INIT;
1152 * Check to see if the value needs to be surrounded with a dq pair.
1153 * Note that problematic characters are always backslash-quoted; this
1154 * check is about not losing leading or trailing SP and strings that
1155 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1156 * configuration parser.
1158 if (value[0] == ' ')
1160 for (i = 0; value[i]; i++)
1161 if (value[i] == ';' || value[i] == '#')
1163 if (i && value[i - 1] == ' ')
1166 strbuf_addf(&sb, "\t%.*s = %s",
1167 length, key + store.baselen + 1, quote);
1169 for (i = 0; value[i]; i++)
1172 strbuf_addstr(&sb, "\\n");
1175 strbuf_addstr(&sb, "\\t");
1179 strbuf_addch(&sb, '\\');
1181 strbuf_addch(&sb, value[i]);
1184 strbuf_addf(&sb, "%s\n", quote);
1186 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1187 strbuf_release(&sb);
1192 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1193 size_t offset_, int *found_bracket)
1195 size_t equal_offset = size, bracket_offset = size;
1199 for (offset = offset_-2; offset > 0
1200 && contents[offset] != '\n'; offset--)
1201 switch (contents[offset]) {
1202 case '=': equal_offset = offset; break;
1203 case ']': bracket_offset = offset; break;
1205 if (offset > 0 && contents[offset-1] == '\\') {
1209 if (bracket_offset < equal_offset) {
1211 offset = bracket_offset+1;
1218 int git_config_set_in_file(const char *config_filename,
1219 const char *key, const char *value)
1221 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1224 int git_config_set(const char *key, const char *value)
1226 return git_config_set_multivar(key, value, NULL, 0);
1230 * Auxiliary function to sanity-check and split the key into the section
1231 * identifier and variable name.
1233 * Returns 0 on success, -1 when there is an invalid character in the key and
1234 * -2 if there is no section name in the key.
1236 * store_key - pointer to char* which will hold a copy of the key with
1237 * lowercase section and variable name
1238 * baselen - pointer to int which will hold the length of the
1239 * section + subsection part, can be NULL
1241 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1243 int i, dot, baselen;
1244 const char *last_dot = strrchr(key, '.');
1247 * Since "key" actually contains the section name and the real
1248 * key name separated by a dot, we have to know where the dot is.
1251 if (last_dot == NULL || last_dot == key) {
1252 error("key does not contain a section: %s", key);
1253 return -CONFIG_NO_SECTION_OR_NAME;
1257 error("key does not contain variable name: %s", key);
1258 return -CONFIG_NO_SECTION_OR_NAME;
1261 baselen = last_dot - key;
1263 *baselen_ = baselen;
1266 * Validate the key and while at it, lower case it for matching.
1268 *store_key = xmalloc(strlen(key) + 1);
1271 for (i = 0; key[i]; i++) {
1272 unsigned char c = key[i];
1275 /* Leave the extended basename untouched.. */
1276 if (!dot || i > baselen) {
1277 if (!iskeychar(c) ||
1278 (i == baselen + 1 && !isalpha(c))) {
1279 error("invalid key: %s", key);
1280 goto out_free_ret_1;
1283 } else if (c == '\n') {
1284 error("invalid key (newline): %s", key);
1285 goto out_free_ret_1;
1287 (*store_key)[i] = c;
1289 (*store_key)[i] = 0;
1295 return -CONFIG_INVALID_KEY;
1299 * If value==NULL, unset in (remove from) config,
1300 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1301 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1302 * else all matching key/values (regardless how many) are removed,
1303 * before the new pair is written.
1305 * Returns 0 on success.
1307 * This function does this:
1309 * - it locks the config file by creating ".git/config.lock"
1311 * - it then parses the config using store_aux() as validator to find
1312 * the position on the key/value pair to replace. If it is to be unset,
1313 * it must be found exactly once.
1315 * - the config file is mmap()ed and the part before the match (if any) is
1316 * written to the lock file, then the changed part and the rest.
1318 * - the config file is removed and the lock file rename()d to it.
1321 int git_config_set_multivar_in_file(const char *config_filename,
1322 const char *key, const char *value,
1323 const char *value_regex, int multi_replace)
1327 struct lock_file *lock = NULL;
1328 char *filename_buf = NULL;
1330 /* parse-key returns negative; flip the sign to feed exit(3) */
1331 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1335 store.multi_replace = multi_replace;
1337 if (!config_filename)
1338 config_filename = filename_buf = git_pathdup("config");
1341 * The lock serves a purpose in addition to locking: the new
1342 * contents of .git/config will be written into it.
1344 lock = xcalloc(sizeof(struct lock_file), 1);
1345 fd = hold_lock_file_for_update(lock, config_filename, 0);
1347 error("could not lock config file %s: %s", config_filename, strerror(errno));
1349 ret = CONFIG_NO_LOCK;
1354 * If .git/config does not exist yet, write a minimal version.
1356 in_fd = open(config_filename, O_RDONLY);
1360 if ( ENOENT != errno ) {
1361 error("opening %s: %s", config_filename,
1363 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1366 /* if nothing to unset, error out */
1367 if (value == NULL) {
1368 ret = CONFIG_NOTHING_SET;
1372 store.key = (char *)key;
1373 if (!store_write_section(fd, key) ||
1374 !store_write_pair(fd, key, value))
1379 size_t contents_sz, copy_begin, copy_end;
1380 int i, new_line = 0;
1382 if (value_regex == NULL)
1383 store.value_regex = NULL;
1385 if (value_regex[0] == '!') {
1386 store.do_not_match = 1;
1389 store.do_not_match = 0;
1391 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1392 if (regcomp(store.value_regex, value_regex,
1394 error("invalid pattern: %s", value_regex);
1395 free(store.value_regex);
1396 ret = CONFIG_INVALID_PATTERN;
1401 store.offset[0] = 0;
1402 store.state = START;
1406 * After this, store.offset will contain the *end* offset
1407 * of the last match, or remain at 0 if no match was found.
1408 * As a side effect, we make sure to transform only a valid
1409 * existing config file.
1411 if (git_config_from_file(store_aux, config_filename, NULL)) {
1412 error("invalid config file %s", config_filename);
1414 if (store.value_regex != NULL) {
1415 regfree(store.value_regex);
1416 free(store.value_regex);
1418 ret = CONFIG_INVALID_FILE;
1423 if (store.value_regex != NULL) {
1424 regfree(store.value_regex);
1425 free(store.value_regex);
1428 /* if nothing to unset, or too many matches, error out */
1429 if ((store.seen == 0 && value == NULL) ||
1430 (store.seen > 1 && multi_replace == 0)) {
1431 ret = CONFIG_NOTHING_SET;
1436 contents_sz = xsize_t(st.st_size);
1437 contents = xmmap(NULL, contents_sz, PROT_READ,
1438 MAP_PRIVATE, in_fd, 0);
1441 if (store.seen == 0)
1444 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1445 if (store.offset[i] == 0) {
1446 store.offset[i] = copy_end = contents_sz;
1447 } else if (store.state != KEY_SEEN) {
1448 copy_end = store.offset[i];
1450 copy_end = find_beginning_of_line(
1451 contents, contents_sz,
1452 store.offset[i]-2, &new_line);
1454 if (copy_end > 0 && contents[copy_end-1] != '\n')
1457 /* write the first part of the config */
1458 if (copy_end > copy_begin) {
1459 if (write_in_full(fd, contents + copy_begin,
1460 copy_end - copy_begin) <
1461 copy_end - copy_begin)
1464 write_str_in_full(fd, "\n") != 1)
1467 copy_begin = store.offset[i];
1470 /* write the pair (value == NULL means unset) */
1471 if (value != NULL) {
1472 if (store.state == START) {
1473 if (!store_write_section(fd, key))
1476 if (!store_write_pair(fd, key, value))
1480 /* write the rest of the config */
1481 if (copy_begin < contents_sz)
1482 if (write_in_full(fd, contents + copy_begin,
1483 contents_sz - copy_begin) <
1484 contents_sz - copy_begin)
1487 munmap(contents, contents_sz);
1490 if (commit_lock_file(lock) < 0) {
1491 error("could not commit config file %s", config_filename);
1492 ret = CONFIG_NO_WRITE;
1497 * lock is committed, so don't try to roll it back below.
1498 * NOTE: Since lockfile.c keeps a linked list of all created
1499 * lock_file structures, it isn't safe to free(lock). It's
1500 * better to just leave it hanging around.
1507 rollback_lock_file(lock);
1512 ret = write_error(lock->filename);
1517 int git_config_set_multivar(const char *key, const char *value,
1518 const char *value_regex, int multi_replace)
1520 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1524 static int section_name_match (const char *buf, const char *name)
1526 int i = 0, j = 0, dot = 0;
1529 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1530 if (!dot && isspace(buf[i])) {
1532 if (name[j++] != '.')
1534 for (i++; isspace(buf[i]); i++)
1540 if (buf[i] == '\\' && dot)
1542 else if (buf[i] == '"' && dot) {
1543 for (i++; isspace(buf[i]); i++)
1547 if (buf[i] != name[j++])
1550 if (buf[i] == ']' && name[j] == 0) {
1552 * We match, now just find the right length offset by
1553 * gobbling up any whitespace after it, as well
1556 for (; buf[i] && isspace(buf[i]); i++)
1563 static int section_name_is_ok(const char *name)
1565 /* Empty section names are bogus. */
1570 * Before a dot, we must be alphanumeric or dash. After the first dot,
1571 * anything goes, so we can stop checking.
1573 for (; *name && *name != '.'; name++)
1574 if (*name != '-' && !isalnum(*name))
1579 /* if new_name == NULL, the section is removed instead */
1580 int git_config_rename_section_in_file(const char *config_filename,
1581 const char *old_name, const char *new_name)
1583 int ret = 0, remove = 0;
1584 char *filename_buf = NULL;
1585 struct lock_file *lock;
1590 if (new_name && !section_name_is_ok(new_name)) {
1591 ret = error("invalid section name: %s", new_name);
1595 if (!config_filename)
1596 config_filename = filename_buf = git_pathdup("config");
1598 lock = xcalloc(sizeof(struct lock_file), 1);
1599 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1601 ret = error("could not lock config file %s", config_filename);
1605 if (!(config_file = fopen(config_filename, "rb"))) {
1606 /* no config file means nothing to rename, no error */
1607 goto unlock_and_out;
1610 while (fgets(buf, sizeof(buf), config_file)) {
1614 for (i = 0; buf[i] && isspace(buf[i]); i++)
1616 if (buf[i] == '[') {
1617 /* it's a section */
1618 int offset = section_name_match(&buf[i], old_name);
1621 if (new_name == NULL) {
1625 store.baselen = strlen(new_name);
1626 if (!store_write_section(out_fd, new_name)) {
1627 ret = write_error(lock->filename);
1631 * We wrote out the new section, with
1632 * a newline, now skip the old
1635 output += offset + i;
1636 if (strlen(output) > 0) {
1638 * More content means there's
1639 * a declaration to put on the
1640 * next line; indent with a
1651 length = strlen(output);
1652 if (write_in_full(out_fd, output, length) != length) {
1653 ret = write_error(lock->filename);
1657 fclose(config_file);
1659 if (commit_lock_file(lock) < 0)
1660 ret = error("could not commit config file %s", config_filename);
1666 int git_config_rename_section(const char *old_name, const char *new_name)
1668 return git_config_rename_section_in_file(NULL, old_name, new_name);
1672 * Call this to report error for your variable that should not
1673 * get a boolean value (i.e. "[my] var" means "true").
1675 int config_error_nonbool(const char *var)
1677 return error("Missing value for '%s'", var);