Documentation/describe: improve one-line summary
[git.git] / config.c
blob752e2e227f56edfb7b2ad168798c110c14a2c5e8
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
7 */
8 #include "cache.h"
9 #include "lockfile.h"
10 #include "exec_cmd.h"
11 #include "strbuf.h"
12 #include "quote.h"
13 #include "hashmap.h"
14 #include "string-list.h"
16 struct config_source {
17 struct config_source *prev;
18 union {
19 FILE *file;
20 struct config_buf {
21 const char *buf;
22 size_t len;
23 size_t pos;
24 } buf;
25 } u;
26 const char *name;
27 const char *path;
28 int die_on_error;
29 int linenr;
30 int eof;
31 struct strbuf value;
32 struct strbuf var;
34 int (*do_fgetc)(struct config_source *c);
35 int (*do_ungetc)(int c, struct config_source *conf);
36 long (*do_ftell)(struct config_source *c);
39 static struct config_source *cf;
41 static int zlib_compression_seen;
44 * Default config_set that contains key-value pairs from the usual set of config
45 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
46 * config file and the global /etc/gitconfig)
48 static struct config_set the_config_set;
50 static int config_file_fgetc(struct config_source *conf)
52 return fgetc(conf->u.file);
55 static int config_file_ungetc(int c, struct config_source *conf)
57 return ungetc(c, conf->u.file);
60 static long config_file_ftell(struct config_source *conf)
62 return ftell(conf->u.file);
66 static int config_buf_fgetc(struct config_source *conf)
68 if (conf->u.buf.pos < conf->u.buf.len)
69 return conf->u.buf.buf[conf->u.buf.pos++];
71 return EOF;
74 static int config_buf_ungetc(int c, struct config_source *conf)
76 if (conf->u.buf.pos > 0)
77 return conf->u.buf.buf[--conf->u.buf.pos];
79 return EOF;
82 static long config_buf_ftell(struct config_source *conf)
84 return conf->u.buf.pos;
87 #define MAX_INCLUDE_DEPTH 10
88 static const char include_depth_advice[] =
89 "exceeded maximum include depth (%d) while including\n"
90 " %s\n"
91 "from\n"
92 " %s\n"
93 "Do you have circular includes?";
94 static int handle_path_include(const char *path, struct config_include_data *inc)
96 int ret = 0;
97 struct strbuf buf = STRBUF_INIT;
98 char *expanded;
100 if (!path)
101 return config_error_nonbool("include.path");
103 expanded = expand_user_path(path);
104 if (!expanded)
105 return error("Could not expand include path '%s'", path);
106 path = expanded;
109 * Use an absolute path as-is, but interpret relative paths
110 * based on the including config file.
112 if (!is_absolute_path(path)) {
113 char *slash;
115 if (!cf || !cf->path)
116 return error("relative config includes must come from files");
118 slash = find_last_dir_sep(cf->path);
119 if (slash)
120 strbuf_add(&buf, cf->path, slash - cf->path + 1);
121 strbuf_addstr(&buf, path);
122 path = buf.buf;
125 if (!access_or_die(path, R_OK, 0)) {
126 if (++inc->depth > MAX_INCLUDE_DEPTH)
127 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
128 cf && cf->name ? cf->name : "the command line");
129 ret = git_config_from_file(git_config_include, path, inc);
130 inc->depth--;
132 strbuf_release(&buf);
133 free(expanded);
134 return ret;
137 int git_config_include(const char *var, const char *value, void *data)
139 struct config_include_data *inc = data;
140 int ret;
143 * Pass along all values, including "include" directives; this makes it
144 * possible to query information on the includes themselves.
146 ret = inc->fn(var, value, inc->data);
147 if (ret < 0)
148 return ret;
150 if (!strcmp(var, "include.path"))
151 ret = handle_path_include(value, inc);
152 return ret;
155 void git_config_push_parameter(const char *text)
157 struct strbuf env = STRBUF_INIT;
158 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
159 if (old) {
160 strbuf_addstr(&env, old);
161 strbuf_addch(&env, ' ');
163 sq_quote_buf(&env, text);
164 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
165 strbuf_release(&env);
168 int git_config_parse_parameter(const char *text,
169 config_fn_t fn, void *data)
171 const char *value;
172 struct strbuf **pair;
174 pair = strbuf_split_str(text, '=', 2);
175 if (!pair[0])
176 return error("bogus config parameter: %s", text);
178 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
179 strbuf_setlen(pair[0], pair[0]->len - 1);
180 value = pair[1] ? pair[1]->buf : "";
181 } else {
182 value = NULL;
185 strbuf_trim(pair[0]);
186 if (!pair[0]->len) {
187 strbuf_list_free(pair);
188 return error("bogus config parameter: %s", text);
190 strbuf_tolower(pair[0]);
191 if (fn(pair[0]->buf, value, data) < 0) {
192 strbuf_list_free(pair);
193 return -1;
195 strbuf_list_free(pair);
196 return 0;
199 int git_config_from_parameters(config_fn_t fn, void *data)
201 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
202 char *envw;
203 const char **argv = NULL;
204 int nr = 0, alloc = 0;
205 int i;
207 if (!env)
208 return 0;
209 /* sq_dequote will write over it */
210 envw = xstrdup(env);
212 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
213 free(envw);
214 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
217 for (i = 0; i < nr; i++) {
218 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
219 free(argv);
220 free(envw);
221 return -1;
225 free(argv);
226 free(envw);
227 return nr > 0;
230 static int get_next_char(void)
232 int c = cf->do_fgetc(cf);
234 if (c == '\r') {
235 /* DOS like systems */
236 c = cf->do_fgetc(cf);
237 if (c != '\n') {
238 cf->do_ungetc(c, cf);
239 c = '\r';
242 if (c == '\n')
243 cf->linenr++;
244 if (c == EOF) {
245 cf->eof = 1;
246 cf->linenr++;
247 c = '\n';
249 return c;
252 static char *parse_value(void)
254 int quote = 0, comment = 0, space = 0;
256 strbuf_reset(&cf->value);
257 for (;;) {
258 int c = get_next_char();
259 if (c == '\n') {
260 if (quote) {
261 cf->linenr--;
262 return NULL;
264 return cf->value.buf;
266 if (comment)
267 continue;
268 if (isspace(c) && !quote) {
269 if (cf->value.len)
270 space++;
271 continue;
273 if (!quote) {
274 if (c == ';' || c == '#') {
275 comment = 1;
276 continue;
279 for (; space; space--)
280 strbuf_addch(&cf->value, ' ');
281 if (c == '\\') {
282 c = get_next_char();
283 switch (c) {
284 case '\n':
285 continue;
286 case 't':
287 c = '\t';
288 break;
289 case 'b':
290 c = '\b';
291 break;
292 case 'n':
293 c = '\n';
294 break;
295 /* Some characters escape as themselves */
296 case '\\': case '"':
297 break;
298 /* Reject unknown escape sequences */
299 default:
300 return NULL;
302 strbuf_addch(&cf->value, c);
303 continue;
305 if (c == '"') {
306 quote = 1-quote;
307 continue;
309 strbuf_addch(&cf->value, c);
313 static inline int iskeychar(int c)
315 return isalnum(c) || c == '-';
318 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
320 int c;
321 char *value;
322 int ret;
324 /* Get the full name */
325 for (;;) {
326 c = get_next_char();
327 if (cf->eof)
328 break;
329 if (!iskeychar(c))
330 break;
331 strbuf_addch(name, tolower(c));
334 while (c == ' ' || c == '\t')
335 c = get_next_char();
337 value = NULL;
338 if (c != '\n') {
339 if (c != '=')
340 return -1;
341 value = parse_value();
342 if (!value)
343 return -1;
346 * We already consumed the \n, but we need linenr to point to
347 * the line we just parsed during the call to fn to get
348 * accurate line number in error messages.
350 cf->linenr--;
351 ret = fn(name->buf, value, data);
352 cf->linenr++;
353 return ret;
356 static int get_extended_base_var(struct strbuf *name, int c)
358 do {
359 if (c == '\n')
360 goto error_incomplete_line;
361 c = get_next_char();
362 } while (isspace(c));
364 /* We require the format to be '[base "extension"]' */
365 if (c != '"')
366 return -1;
367 strbuf_addch(name, '.');
369 for (;;) {
370 int c = get_next_char();
371 if (c == '\n')
372 goto error_incomplete_line;
373 if (c == '"')
374 break;
375 if (c == '\\') {
376 c = get_next_char();
377 if (c == '\n')
378 goto error_incomplete_line;
380 strbuf_addch(name, c);
383 /* Final ']' */
384 if (get_next_char() != ']')
385 return -1;
386 return 0;
387 error_incomplete_line:
388 cf->linenr--;
389 return -1;
392 static int get_base_var(struct strbuf *name)
394 for (;;) {
395 int c = get_next_char();
396 if (cf->eof)
397 return -1;
398 if (c == ']')
399 return 0;
400 if (isspace(c))
401 return get_extended_base_var(name, c);
402 if (!iskeychar(c) && c != '.')
403 return -1;
404 strbuf_addch(name, tolower(c));
408 static int git_parse_source(config_fn_t fn, void *data)
410 int comment = 0;
411 int baselen = 0;
412 struct strbuf *var = &cf->var;
414 /* U+FEFF Byte Order Mark in UTF8 */
415 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
416 const unsigned char *bomptr = utf8_bom;
418 for (;;) {
419 int c = get_next_char();
420 if (bomptr && *bomptr) {
421 /* We are at the file beginning; skip UTF8-encoded BOM
422 * if present. Sane editors won't put this in on their
423 * own, but e.g. Windows Notepad will do it happily. */
424 if ((unsigned char) c == *bomptr) {
425 bomptr++;
426 continue;
427 } else {
428 /* Do not tolerate partial BOM. */
429 if (bomptr != utf8_bom)
430 break;
431 /* No BOM at file beginning. Cool. */
432 bomptr = NULL;
435 if (c == '\n') {
436 if (cf->eof)
437 return 0;
438 comment = 0;
439 continue;
441 if (comment || isspace(c))
442 continue;
443 if (c == '#' || c == ';') {
444 comment = 1;
445 continue;
447 if (c == '[') {
448 /* Reset prior to determining a new stem */
449 strbuf_reset(var);
450 if (get_base_var(var) < 0 || var->len < 1)
451 break;
452 strbuf_addch(var, '.');
453 baselen = var->len;
454 continue;
456 if (!isalpha(c))
457 break;
459 * Truncate the var name back to the section header
460 * stem prior to grabbing the suffix part of the name
461 * and the value.
463 strbuf_setlen(var, baselen);
464 strbuf_addch(var, tolower(c));
465 if (get_value(fn, data, var) < 0)
466 break;
468 if (cf->die_on_error)
469 die(_("bad config file line %d in %s"), cf->linenr, cf->name);
470 else
471 return error(_("bad config file line %d in %s"), cf->linenr, cf->name);
474 static int parse_unit_factor(const char *end, uintmax_t *val)
476 if (!*end)
477 return 1;
478 else if (!strcasecmp(end, "k")) {
479 *val *= 1024;
480 return 1;
482 else if (!strcasecmp(end, "m")) {
483 *val *= 1024 * 1024;
484 return 1;
486 else if (!strcasecmp(end, "g")) {
487 *val *= 1024 * 1024 * 1024;
488 return 1;
490 return 0;
493 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
495 if (value && *value) {
496 char *end;
497 intmax_t val;
498 uintmax_t uval;
499 uintmax_t factor = 1;
501 errno = 0;
502 val = strtoimax(value, &end, 0);
503 if (errno == ERANGE)
504 return 0;
505 if (!parse_unit_factor(end, &factor)) {
506 errno = EINVAL;
507 return 0;
509 uval = labs(val);
510 uval *= factor;
511 if (uval > max || labs(val) > uval) {
512 errno = ERANGE;
513 return 0;
515 val *= factor;
516 *ret = val;
517 return 1;
519 errno = EINVAL;
520 return 0;
523 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
525 if (value && *value) {
526 char *end;
527 uintmax_t val;
528 uintmax_t oldval;
530 errno = 0;
531 val = strtoumax(value, &end, 0);
532 if (errno == ERANGE)
533 return 0;
534 oldval = val;
535 if (!parse_unit_factor(end, &val)) {
536 errno = EINVAL;
537 return 0;
539 if (val > max || oldval > val) {
540 errno = ERANGE;
541 return 0;
543 *ret = val;
544 return 1;
546 errno = EINVAL;
547 return 0;
550 static int git_parse_int(const char *value, int *ret)
552 intmax_t tmp;
553 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
554 return 0;
555 *ret = tmp;
556 return 1;
559 static int git_parse_int64(const char *value, int64_t *ret)
561 intmax_t tmp;
562 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
563 return 0;
564 *ret = tmp;
565 return 1;
568 int git_parse_ulong(const char *value, unsigned long *ret)
570 uintmax_t tmp;
571 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
572 return 0;
573 *ret = tmp;
574 return 1;
577 NORETURN
578 static void die_bad_number(const char *name, const char *value)
580 const char *reason = errno == ERANGE ?
581 "out of range" :
582 "invalid unit";
583 if (!value)
584 value = "";
586 if (cf && cf->name)
587 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
588 value, name, cf->name, reason);
589 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
592 int git_config_int(const char *name, const char *value)
594 int ret;
595 if (!git_parse_int(value, &ret))
596 die_bad_number(name, value);
597 return ret;
600 int64_t git_config_int64(const char *name, const char *value)
602 int64_t ret;
603 if (!git_parse_int64(value, &ret))
604 die_bad_number(name, value);
605 return ret;
608 unsigned long git_config_ulong(const char *name, const char *value)
610 unsigned long ret;
611 if (!git_parse_ulong(value, &ret))
612 die_bad_number(name, value);
613 return ret;
616 static int git_config_maybe_bool_text(const char *name, const char *value)
618 if (!value)
619 return 1;
620 if (!*value)
621 return 0;
622 if (!strcasecmp(value, "true")
623 || !strcasecmp(value, "yes")
624 || !strcasecmp(value, "on"))
625 return 1;
626 if (!strcasecmp(value, "false")
627 || !strcasecmp(value, "no")
628 || !strcasecmp(value, "off"))
629 return 0;
630 return -1;
633 int git_config_maybe_bool(const char *name, const char *value)
635 int v = git_config_maybe_bool_text(name, value);
636 if (0 <= v)
637 return v;
638 if (git_parse_int(value, &v))
639 return !!v;
640 return -1;
643 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
645 int v = git_config_maybe_bool_text(name, value);
646 if (0 <= v) {
647 *is_bool = 1;
648 return v;
650 *is_bool = 0;
651 return git_config_int(name, value);
654 int git_config_bool(const char *name, const char *value)
656 int discard;
657 return !!git_config_bool_or_int(name, value, &discard);
660 int git_config_string(const char **dest, const char *var, const char *value)
662 if (!value)
663 return config_error_nonbool(var);
664 *dest = xstrdup(value);
665 return 0;
668 int git_config_pathname(const char **dest, const char *var, const char *value)
670 if (!value)
671 return config_error_nonbool(var);
672 *dest = expand_user_path(value);
673 if (!*dest)
674 die(_("failed to expand user dir in: '%s'"), value);
675 return 0;
678 static int git_default_core_config(const char *var, const char *value)
680 /* This needs a better name */
681 if (!strcmp(var, "core.filemode")) {
682 trust_executable_bit = git_config_bool(var, value);
683 return 0;
685 if (!strcmp(var, "core.trustctime")) {
686 trust_ctime = git_config_bool(var, value);
687 return 0;
689 if (!strcmp(var, "core.checkstat")) {
690 if (!strcasecmp(value, "default"))
691 check_stat = 1;
692 else if (!strcasecmp(value, "minimal"))
693 check_stat = 0;
696 if (!strcmp(var, "core.quotepath")) {
697 quote_path_fully = git_config_bool(var, value);
698 return 0;
701 if (!strcmp(var, "core.symlinks")) {
702 has_symlinks = git_config_bool(var, value);
703 return 0;
706 if (!strcmp(var, "core.ignorecase")) {
707 ignore_case = git_config_bool(var, value);
708 return 0;
711 if (!strcmp(var, "core.attributesfile"))
712 return git_config_pathname(&git_attributes_file, var, value);
714 if (!strcmp(var, "core.bare")) {
715 is_bare_repository_cfg = git_config_bool(var, value);
716 return 0;
719 if (!strcmp(var, "core.ignorestat")) {
720 assume_unchanged = git_config_bool(var, value);
721 return 0;
724 if (!strcmp(var, "core.prefersymlinkrefs")) {
725 prefer_symlink_refs = git_config_bool(var, value);
726 return 0;
729 if (!strcmp(var, "core.logallrefupdates")) {
730 log_all_ref_updates = git_config_bool(var, value);
731 return 0;
734 if (!strcmp(var, "core.warnambiguousrefs")) {
735 warn_ambiguous_refs = git_config_bool(var, value);
736 return 0;
739 if (!strcmp(var, "core.abbrev")) {
740 int abbrev = git_config_int(var, value);
741 if (abbrev < minimum_abbrev || abbrev > 40)
742 return -1;
743 default_abbrev = abbrev;
744 return 0;
747 if (!strcmp(var, "core.loosecompression")) {
748 int level = git_config_int(var, value);
749 if (level == -1)
750 level = Z_DEFAULT_COMPRESSION;
751 else if (level < 0 || level > Z_BEST_COMPRESSION)
752 die(_("bad zlib compression level %d"), level);
753 zlib_compression_level = level;
754 zlib_compression_seen = 1;
755 return 0;
758 if (!strcmp(var, "core.compression")) {
759 int level = git_config_int(var, value);
760 if (level == -1)
761 level = Z_DEFAULT_COMPRESSION;
762 else if (level < 0 || level > Z_BEST_COMPRESSION)
763 die(_("bad zlib compression level %d"), level);
764 core_compression_level = level;
765 core_compression_seen = 1;
766 if (!zlib_compression_seen)
767 zlib_compression_level = level;
768 return 0;
771 if (!strcmp(var, "core.packedgitwindowsize")) {
772 int pgsz_x2 = getpagesize() * 2;
773 packed_git_window_size = git_config_ulong(var, value);
775 /* This value must be multiple of (pagesize * 2) */
776 packed_git_window_size /= pgsz_x2;
777 if (packed_git_window_size < 1)
778 packed_git_window_size = 1;
779 packed_git_window_size *= pgsz_x2;
780 return 0;
783 if (!strcmp(var, "core.bigfilethreshold")) {
784 big_file_threshold = git_config_ulong(var, value);
785 return 0;
788 if (!strcmp(var, "core.packedgitlimit")) {
789 packed_git_limit = git_config_ulong(var, value);
790 return 0;
793 if (!strcmp(var, "core.deltabasecachelimit")) {
794 delta_base_cache_limit = git_config_ulong(var, value);
795 return 0;
798 if (!strcmp(var, "core.autocrlf")) {
799 if (value && !strcasecmp(value, "input")) {
800 if (core_eol == EOL_CRLF)
801 return error("core.autocrlf=input conflicts with core.eol=crlf");
802 auto_crlf = AUTO_CRLF_INPUT;
803 return 0;
805 auto_crlf = git_config_bool(var, value);
806 return 0;
809 if (!strcmp(var, "core.safecrlf")) {
810 if (value && !strcasecmp(value, "warn")) {
811 safe_crlf = SAFE_CRLF_WARN;
812 return 0;
814 safe_crlf = git_config_bool(var, value);
815 return 0;
818 if (!strcmp(var, "core.eol")) {
819 if (value && !strcasecmp(value, "lf"))
820 core_eol = EOL_LF;
821 else if (value && !strcasecmp(value, "crlf"))
822 core_eol = EOL_CRLF;
823 else if (value && !strcasecmp(value, "native"))
824 core_eol = EOL_NATIVE;
825 else
826 core_eol = EOL_UNSET;
827 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
828 return error("core.autocrlf=input conflicts with core.eol=crlf");
829 return 0;
832 if (!strcmp(var, "core.notesref")) {
833 notes_ref_name = xstrdup(value);
834 return 0;
837 if (!strcmp(var, "core.pager"))
838 return git_config_string(&pager_program, var, value);
840 if (!strcmp(var, "core.editor"))
841 return git_config_string(&editor_program, var, value);
843 if (!strcmp(var, "core.commentchar")) {
844 if (!value)
845 return config_error_nonbool(var);
846 else if (!strcasecmp(value, "auto"))
847 auto_comment_line_char = 1;
848 else if (value[0] && !value[1]) {
849 comment_line_char = value[0];
850 auto_comment_line_char = 0;
851 } else
852 return error("core.commentChar should only be one character");
853 return 0;
856 if (!strcmp(var, "core.askpass"))
857 return git_config_string(&askpass_program, var, value);
859 if (!strcmp(var, "core.excludesfile"))
860 return git_config_pathname(&excludes_file, var, value);
862 if (!strcmp(var, "core.whitespace")) {
863 if (!value)
864 return config_error_nonbool(var);
865 whitespace_rule_cfg = parse_whitespace_rule(value);
866 return 0;
869 if (!strcmp(var, "core.fsyncobjectfiles")) {
870 fsync_object_files = git_config_bool(var, value);
871 return 0;
874 if (!strcmp(var, "core.preloadindex")) {
875 core_preload_index = git_config_bool(var, value);
876 return 0;
879 if (!strcmp(var, "core.createobject")) {
880 if (!strcmp(value, "rename"))
881 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
882 else if (!strcmp(value, "link"))
883 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
884 else
885 die(_("invalid mode for object creation: %s"), value);
886 return 0;
889 if (!strcmp(var, "core.sparsecheckout")) {
890 core_apply_sparse_checkout = git_config_bool(var, value);
891 return 0;
894 if (!strcmp(var, "core.precomposeunicode")) {
895 precomposed_unicode = git_config_bool(var, value);
896 return 0;
899 if (!strcmp(var, "core.protecthfs")) {
900 protect_hfs = git_config_bool(var, value);
901 return 0;
904 if (!strcmp(var, "core.protectntfs")) {
905 protect_ntfs = git_config_bool(var, value);
906 return 0;
909 /* Add other config variables here and to Documentation/config.txt. */
910 return 0;
913 static int git_default_i18n_config(const char *var, const char *value)
915 if (!strcmp(var, "i18n.commitencoding"))
916 return git_config_string(&git_commit_encoding, var, value);
918 if (!strcmp(var, "i18n.logoutputencoding"))
919 return git_config_string(&git_log_output_encoding, var, value);
921 /* Add other config variables here and to Documentation/config.txt. */
922 return 0;
925 static int git_default_branch_config(const char *var, const char *value)
927 if (!strcmp(var, "branch.autosetupmerge")) {
928 if (value && !strcasecmp(value, "always")) {
929 git_branch_track = BRANCH_TRACK_ALWAYS;
930 return 0;
932 git_branch_track = git_config_bool(var, value);
933 return 0;
935 if (!strcmp(var, "branch.autosetuprebase")) {
936 if (!value)
937 return config_error_nonbool(var);
938 else if (!strcmp(value, "never"))
939 autorebase = AUTOREBASE_NEVER;
940 else if (!strcmp(value, "local"))
941 autorebase = AUTOREBASE_LOCAL;
942 else if (!strcmp(value, "remote"))
943 autorebase = AUTOREBASE_REMOTE;
944 else if (!strcmp(value, "always"))
945 autorebase = AUTOREBASE_ALWAYS;
946 else
947 return error("Malformed value for %s", var);
948 return 0;
951 /* Add other config variables here and to Documentation/config.txt. */
952 return 0;
955 static int git_default_push_config(const char *var, const char *value)
957 if (!strcmp(var, "push.default")) {
958 if (!value)
959 return config_error_nonbool(var);
960 else if (!strcmp(value, "nothing"))
961 push_default = PUSH_DEFAULT_NOTHING;
962 else if (!strcmp(value, "matching"))
963 push_default = PUSH_DEFAULT_MATCHING;
964 else if (!strcmp(value, "simple"))
965 push_default = PUSH_DEFAULT_SIMPLE;
966 else if (!strcmp(value, "upstream"))
967 push_default = PUSH_DEFAULT_UPSTREAM;
968 else if (!strcmp(value, "tracking")) /* deprecated */
969 push_default = PUSH_DEFAULT_UPSTREAM;
970 else if (!strcmp(value, "current"))
971 push_default = PUSH_DEFAULT_CURRENT;
972 else {
973 error("Malformed value for %s: %s", var, value);
974 return error("Must be one of nothing, matching, simple, "
975 "upstream or current.");
977 return 0;
980 /* Add other config variables here and to Documentation/config.txt. */
981 return 0;
984 static int git_default_mailmap_config(const char *var, const char *value)
986 if (!strcmp(var, "mailmap.file"))
987 return git_config_pathname(&git_mailmap_file, var, value);
988 if (!strcmp(var, "mailmap.blob"))
989 return git_config_string(&git_mailmap_blob, var, value);
991 /* Add other config variables here and to Documentation/config.txt. */
992 return 0;
995 int git_default_config(const char *var, const char *value, void *dummy)
997 if (starts_with(var, "core."))
998 return git_default_core_config(var, value);
1000 if (starts_with(var, "user."))
1001 return git_ident_config(var, value, dummy);
1003 if (starts_with(var, "i18n."))
1004 return git_default_i18n_config(var, value);
1006 if (starts_with(var, "branch."))
1007 return git_default_branch_config(var, value);
1009 if (starts_with(var, "push."))
1010 return git_default_push_config(var, value);
1012 if (starts_with(var, "mailmap."))
1013 return git_default_mailmap_config(var, value);
1015 if (starts_with(var, "advice."))
1016 return git_default_advice_config(var, value);
1018 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1019 pager_use_color = git_config_bool(var,value);
1020 return 0;
1023 if (!strcmp(var, "pack.packsizelimit")) {
1024 pack_size_limit_cfg = git_config_ulong(var, value);
1025 return 0;
1027 /* Add other config variables here and to Documentation/config.txt. */
1028 return 0;
1032 * All source specific fields in the union, die_on_error, name and the callbacks
1033 * fgetc, ungetc, ftell of top need to be initialized before calling
1034 * this function.
1036 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1038 int ret;
1040 /* push config-file parsing state stack */
1041 top->prev = cf;
1042 top->linenr = 1;
1043 top->eof = 0;
1044 strbuf_init(&top->value, 1024);
1045 strbuf_init(&top->var, 1024);
1046 cf = top;
1048 ret = git_parse_source(fn, data);
1050 /* pop config-file parsing state stack */
1051 strbuf_release(&top->value);
1052 strbuf_release(&top->var);
1053 cf = top->prev;
1055 return ret;
1058 static int do_config_from_file(config_fn_t fn,
1059 const char *name, const char *path, FILE *f, void *data)
1061 struct config_source top;
1063 top.u.file = f;
1064 top.name = name;
1065 top.path = path;
1066 top.die_on_error = 1;
1067 top.do_fgetc = config_file_fgetc;
1068 top.do_ungetc = config_file_ungetc;
1069 top.do_ftell = config_file_ftell;
1071 return do_config_from(&top, fn, data);
1074 static int git_config_from_stdin(config_fn_t fn, void *data)
1076 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1079 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1081 int ret = -1;
1082 FILE *f;
1084 f = fopen(filename, "r");
1085 if (f) {
1086 ret = do_config_from_file(fn, filename, filename, f, data);
1087 fclose(f);
1089 return ret;
1092 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1093 size_t len, void *data)
1095 struct config_source top;
1097 top.u.buf.buf = buf;
1098 top.u.buf.len = len;
1099 top.u.buf.pos = 0;
1100 top.name = name;
1101 top.path = NULL;
1102 top.die_on_error = 0;
1103 top.do_fgetc = config_buf_fgetc;
1104 top.do_ungetc = config_buf_ungetc;
1105 top.do_ftell = config_buf_ftell;
1107 return do_config_from(&top, fn, data);
1110 static int git_config_from_blob_sha1(config_fn_t fn,
1111 const char *name,
1112 const unsigned char *sha1,
1113 void *data)
1115 enum object_type type;
1116 char *buf;
1117 unsigned long size;
1118 int ret;
1120 buf = read_sha1_file(sha1, &type, &size);
1121 if (!buf)
1122 return error("unable to load config blob object '%s'", name);
1123 if (type != OBJ_BLOB) {
1124 free(buf);
1125 return error("reference '%s' does not point to a blob", name);
1128 ret = git_config_from_buf(fn, name, buf, size, data);
1129 free(buf);
1131 return ret;
1134 static int git_config_from_blob_ref(config_fn_t fn,
1135 const char *name,
1136 void *data)
1138 unsigned char sha1[20];
1140 if (get_sha1(name, sha1) < 0)
1141 return error("unable to resolve config blob '%s'", name);
1142 return git_config_from_blob_sha1(fn, name, sha1, data);
1145 const char *git_etc_gitconfig(void)
1147 static const char *system_wide;
1148 if (!system_wide)
1149 system_wide = system_path(ETC_GITCONFIG);
1150 return system_wide;
1154 * Parse environment variable 'k' as a boolean (in various
1155 * possible spellings); if missing, use the default value 'def'.
1157 int git_env_bool(const char *k, int def)
1159 const char *v = getenv(k);
1160 return v ? git_config_bool(k, v) : def;
1164 * Parse environment variable 'k' as ulong with possibly a unit
1165 * suffix; if missing, use the default value 'val'.
1167 unsigned long git_env_ulong(const char *k, unsigned long val)
1169 const char *v = getenv(k);
1170 if (v && !git_parse_ulong(v, &val))
1171 die("failed to parse %s", k);
1172 return val;
1175 int git_config_system(void)
1177 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1180 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1182 int ret = 0, found = 0;
1183 char *xdg_config = NULL;
1184 char *user_config = NULL;
1186 home_config_paths(&user_config, &xdg_config, "config");
1188 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1189 ret += git_config_from_file(fn, git_etc_gitconfig(),
1190 data);
1191 found += 1;
1194 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1195 ret += git_config_from_file(fn, xdg_config, data);
1196 found += 1;
1199 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1200 ret += git_config_from_file(fn, user_config, data);
1201 found += 1;
1204 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1205 ret += git_config_from_file(fn, repo_config, data);
1206 found += 1;
1209 switch (git_config_from_parameters(fn, data)) {
1210 case -1: /* error */
1211 die(_("unable to parse command-line config"));
1212 break;
1213 case 0: /* found nothing */
1214 break;
1215 default: /* found at least one item */
1216 found++;
1217 break;
1220 free(xdg_config);
1221 free(user_config);
1222 return ret == 0 ? found : ret;
1225 int git_config_with_options(config_fn_t fn, void *data,
1226 struct git_config_source *config_source,
1227 int respect_includes)
1229 char *repo_config = NULL;
1230 int ret;
1231 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1233 if (respect_includes) {
1234 inc.fn = fn;
1235 inc.data = data;
1236 fn = git_config_include;
1237 data = &inc;
1241 * If we have a specific filename, use it. Otherwise, follow the
1242 * regular lookup sequence.
1244 if (config_source && config_source->use_stdin)
1245 return git_config_from_stdin(fn, data);
1246 else if (config_source && config_source->file)
1247 return git_config_from_file(fn, config_source->file, data);
1248 else if (config_source && config_source->blob)
1249 return git_config_from_blob_ref(fn, config_source->blob, data);
1251 repo_config = git_pathdup("config");
1252 ret = git_config_early(fn, data, repo_config);
1253 if (repo_config)
1254 free(repo_config);
1255 return ret;
1258 static void git_config_raw(config_fn_t fn, void *data)
1260 if (git_config_with_options(fn, data, NULL, 1) < 0)
1262 * git_config_with_options() normally returns only
1263 * positive values, as most errors are fatal, and
1264 * non-fatal potential errors are guarded by "if"
1265 * statements that are entered only when no error is
1266 * possible.
1268 * If we ever encounter a non-fatal error, it means
1269 * something went really wrong and we should stop
1270 * immediately.
1272 die(_("unknown error occured while reading the configuration files"));
1275 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1277 int i, value_index;
1278 struct string_list *values;
1279 struct config_set_element *entry;
1280 struct configset_list *list = &cs->list;
1281 struct key_value_info *kv_info;
1283 for (i = 0; i < list->nr; i++) {
1284 entry = list->items[i].e;
1285 value_index = list->items[i].value_index;
1286 values = &entry->value_list;
1287 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1288 kv_info = values->items[value_index].util;
1289 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1294 static void git_config_check_init(void);
1296 void git_config(config_fn_t fn, void *data)
1298 git_config_check_init();
1299 configset_iter(&the_config_set, fn, data);
1302 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1304 struct config_set_element k;
1305 struct config_set_element *found_entry;
1306 char *normalized_key;
1307 int ret;
1309 * `key` may come from the user, so normalize it before using it
1310 * for querying entries from the hashmap.
1312 ret = git_config_parse_key(key, &normalized_key, NULL);
1314 if (ret)
1315 return NULL;
1317 hashmap_entry_init(&k, strhash(normalized_key));
1318 k.key = normalized_key;
1319 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1320 free(normalized_key);
1321 return found_entry;
1324 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1326 struct config_set_element *e;
1327 struct string_list_item *si;
1328 struct configset_list_item *l_item;
1329 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1331 e = configset_find_element(cs, key);
1333 * Since the keys are being fed by git_config*() callback mechanism, they
1334 * are already normalized. So simply add them without any further munging.
1336 if (!e) {
1337 e = xmalloc(sizeof(*e));
1338 hashmap_entry_init(e, strhash(key));
1339 e->key = xstrdup(key);
1340 string_list_init(&e->value_list, 1);
1341 hashmap_add(&cs->config_hash, e);
1343 si = string_list_append_nodup(&e->value_list, value ? xstrdup(value) : NULL);
1345 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1346 l_item = &cs->list.items[cs->list.nr++];
1347 l_item->e = e;
1348 l_item->value_index = e->value_list.nr - 1;
1350 if (cf) {
1351 kv_info->filename = strintern(cf->name);
1352 kv_info->linenr = cf->linenr;
1353 } else {
1354 /* for values read from `git_config_from_parameters()` */
1355 kv_info->filename = NULL;
1356 kv_info->linenr = -1;
1358 si->util = kv_info;
1360 return 0;
1363 static int config_set_element_cmp(const struct config_set_element *e1,
1364 const struct config_set_element *e2, const void *unused)
1366 return strcmp(e1->key, e2->key);
1369 void git_configset_init(struct config_set *cs)
1371 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1372 cs->hash_initialized = 1;
1373 cs->list.nr = 0;
1374 cs->list.alloc = 0;
1375 cs->list.items = NULL;
1378 void git_configset_clear(struct config_set *cs)
1380 struct config_set_element *entry;
1381 struct hashmap_iter iter;
1382 if (!cs->hash_initialized)
1383 return;
1385 hashmap_iter_init(&cs->config_hash, &iter);
1386 while ((entry = hashmap_iter_next(&iter))) {
1387 free(entry->key);
1388 string_list_clear(&entry->value_list, 1);
1390 hashmap_free(&cs->config_hash, 1);
1391 cs->hash_initialized = 0;
1392 free(cs->list.items);
1393 cs->list.nr = 0;
1394 cs->list.alloc = 0;
1395 cs->list.items = NULL;
1398 static int config_set_callback(const char *key, const char *value, void *cb)
1400 struct config_set *cs = cb;
1401 configset_add_value(cs, key, value);
1402 return 0;
1405 int git_configset_add_file(struct config_set *cs, const char *filename)
1407 return git_config_from_file(config_set_callback, filename, cs);
1410 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1412 const struct string_list *values = NULL;
1414 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1415 * queried key in the files of the configset, the value returned will be the last
1416 * value in the value list for that key.
1418 values = git_configset_get_value_multi(cs, key);
1420 if (!values)
1421 return 1;
1422 assert(values->nr > 0);
1423 *value = values->items[values->nr - 1].string;
1424 return 0;
1427 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1429 struct config_set_element *e = configset_find_element(cs, key);
1430 return e ? &e->value_list : NULL;
1433 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1435 const char *value;
1436 if (!git_configset_get_value(cs, key, &value))
1437 return git_config_string(dest, key, value);
1438 else
1439 return 1;
1442 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1444 return git_configset_get_string_const(cs, key, (const char **)dest);
1447 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1449 const char *value;
1450 if (!git_configset_get_value(cs, key, &value)) {
1451 *dest = git_config_int(key, value);
1452 return 0;
1453 } else
1454 return 1;
1457 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1459 const char *value;
1460 if (!git_configset_get_value(cs, key, &value)) {
1461 *dest = git_config_ulong(key, value);
1462 return 0;
1463 } else
1464 return 1;
1467 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1469 const char *value;
1470 if (!git_configset_get_value(cs, key, &value)) {
1471 *dest = git_config_bool(key, value);
1472 return 0;
1473 } else
1474 return 1;
1477 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1478 int *is_bool, int *dest)
1480 const char *value;
1481 if (!git_configset_get_value(cs, key, &value)) {
1482 *dest = git_config_bool_or_int(key, value, is_bool);
1483 return 0;
1484 } else
1485 return 1;
1488 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1490 const char *value;
1491 if (!git_configset_get_value(cs, key, &value)) {
1492 *dest = git_config_maybe_bool(key, value);
1493 if (*dest == -1)
1494 return -1;
1495 return 0;
1496 } else
1497 return 1;
1500 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1502 const char *value;
1503 if (!git_configset_get_value(cs, key, &value))
1504 return git_config_pathname(dest, key, value);
1505 else
1506 return 1;
1509 static void git_config_check_init(void)
1511 if (the_config_set.hash_initialized)
1512 return;
1513 git_configset_init(&the_config_set);
1514 git_config_raw(config_set_callback, &the_config_set);
1517 void git_config_clear(void)
1519 if (!the_config_set.hash_initialized)
1520 return;
1521 git_configset_clear(&the_config_set);
1524 int git_config_get_value(const char *key, const char **value)
1526 git_config_check_init();
1527 return git_configset_get_value(&the_config_set, key, value);
1530 const struct string_list *git_config_get_value_multi(const char *key)
1532 git_config_check_init();
1533 return git_configset_get_value_multi(&the_config_set, key);
1536 int git_config_get_string_const(const char *key, const char **dest)
1538 int ret;
1539 git_config_check_init();
1540 ret = git_configset_get_string_const(&the_config_set, key, dest);
1541 if (ret < 0)
1542 git_die_config(key, NULL);
1543 return ret;
1546 int git_config_get_string(const char *key, char **dest)
1548 git_config_check_init();
1549 return git_config_get_string_const(key, (const char **)dest);
1552 int git_config_get_int(const char *key, int *dest)
1554 git_config_check_init();
1555 return git_configset_get_int(&the_config_set, key, dest);
1558 int git_config_get_ulong(const char *key, unsigned long *dest)
1560 git_config_check_init();
1561 return git_configset_get_ulong(&the_config_set, key, dest);
1564 int git_config_get_bool(const char *key, int *dest)
1566 git_config_check_init();
1567 return git_configset_get_bool(&the_config_set, key, dest);
1570 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1572 git_config_check_init();
1573 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1576 int git_config_get_maybe_bool(const char *key, int *dest)
1578 git_config_check_init();
1579 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1582 int git_config_get_pathname(const char *key, const char **dest)
1584 int ret;
1585 git_config_check_init();
1586 ret = git_configset_get_pathname(&the_config_set, key, dest);
1587 if (ret < 0)
1588 git_die_config(key, NULL);
1589 return ret;
1592 NORETURN
1593 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1595 if (!filename)
1596 die(_("unable to parse '%s' from command-line config"), key);
1597 else
1598 die(_("bad config variable '%s' in file '%s' at line %d"),
1599 key, filename, linenr);
1602 NORETURN __attribute__((format(printf, 2, 3)))
1603 void git_die_config(const char *key, const char *err, ...)
1605 const struct string_list *values;
1606 struct key_value_info *kv_info;
1608 if (err) {
1609 va_list params;
1610 va_start(params, err);
1611 vreportf("error: ", err, params);
1612 va_end(params);
1614 values = git_config_get_value_multi(key);
1615 kv_info = values->items[values->nr - 1].util;
1616 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1620 * Find all the stuff for git_config_set() below.
1623 static struct {
1624 int baselen;
1625 char *key;
1626 int do_not_match;
1627 regex_t *value_regex;
1628 int multi_replace;
1629 size_t *offset;
1630 unsigned int offset_alloc;
1631 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1632 int seen;
1633 } store;
1635 static int matches(const char *key, const char *value)
1637 if (strcmp(key, store.key))
1638 return 0; /* not ours */
1639 if (!store.value_regex)
1640 return 1; /* always matches */
1641 if (store.value_regex == CONFIG_REGEX_NONE)
1642 return 0; /* never matches */
1644 return store.do_not_match ^
1645 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1648 static int store_aux(const char *key, const char *value, void *cb)
1650 const char *ep;
1651 size_t section_len;
1653 switch (store.state) {
1654 case KEY_SEEN:
1655 if (matches(key, value)) {
1656 if (store.seen == 1 && store.multi_replace == 0) {
1657 warning(_("%s has multiple values"), key);
1660 ALLOC_GROW(store.offset, store.seen + 1,
1661 store.offset_alloc);
1663 store.offset[store.seen] = cf->do_ftell(cf);
1664 store.seen++;
1666 break;
1667 case SECTION_SEEN:
1669 * What we are looking for is in store.key (both
1670 * section and var), and its section part is baselen
1671 * long. We found key (again, both section and var).
1672 * We would want to know if this key is in the same
1673 * section as what we are looking for. We already
1674 * know we are in the same section as what should
1675 * hold store.key.
1677 ep = strrchr(key, '.');
1678 section_len = ep - key;
1680 if ((section_len != store.baselen) ||
1681 memcmp(key, store.key, section_len+1)) {
1682 store.state = SECTION_END_SEEN;
1683 break;
1687 * Do not increment matches: this is no match, but we
1688 * just made sure we are in the desired section.
1690 ALLOC_GROW(store.offset, store.seen + 1,
1691 store.offset_alloc);
1692 store.offset[store.seen] = cf->do_ftell(cf);
1693 /* fallthru */
1694 case SECTION_END_SEEN:
1695 case START:
1696 if (matches(key, value)) {
1697 ALLOC_GROW(store.offset, store.seen + 1,
1698 store.offset_alloc);
1699 store.offset[store.seen] = cf->do_ftell(cf);
1700 store.state = KEY_SEEN;
1701 store.seen++;
1702 } else {
1703 if (strrchr(key, '.') - key == store.baselen &&
1704 !strncmp(key, store.key, store.baselen)) {
1705 store.state = SECTION_SEEN;
1706 ALLOC_GROW(store.offset,
1707 store.seen + 1,
1708 store.offset_alloc);
1709 store.offset[store.seen] = cf->do_ftell(cf);
1713 return 0;
1716 static int write_error(const char *filename)
1718 error("failed to write new configuration file %s", filename);
1720 /* Same error code as "failed to rename". */
1721 return 4;
1724 static int store_write_section(int fd, const char *key)
1726 const char *dot;
1727 int i, success;
1728 struct strbuf sb = STRBUF_INIT;
1730 dot = memchr(key, '.', store.baselen);
1731 if (dot) {
1732 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1733 for (i = dot - key + 1; i < store.baselen; i++) {
1734 if (key[i] == '"' || key[i] == '\\')
1735 strbuf_addch(&sb, '\\');
1736 strbuf_addch(&sb, key[i]);
1738 strbuf_addstr(&sb, "\"]\n");
1739 } else {
1740 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1743 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1744 strbuf_release(&sb);
1746 return success;
1749 static int store_write_pair(int fd, const char *key, const char *value)
1751 int i, success;
1752 int length = strlen(key + store.baselen + 1);
1753 const char *quote = "";
1754 struct strbuf sb = STRBUF_INIT;
1757 * Check to see if the value needs to be surrounded with a dq pair.
1758 * Note that problematic characters are always backslash-quoted; this
1759 * check is about not losing leading or trailing SP and strings that
1760 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1761 * configuration parser.
1763 if (value[0] == ' ')
1764 quote = "\"";
1765 for (i = 0; value[i]; i++)
1766 if (value[i] == ';' || value[i] == '#')
1767 quote = "\"";
1768 if (i && value[i - 1] == ' ')
1769 quote = "\"";
1771 strbuf_addf(&sb, "\t%.*s = %s",
1772 length, key + store.baselen + 1, quote);
1774 for (i = 0; value[i]; i++)
1775 switch (value[i]) {
1776 case '\n':
1777 strbuf_addstr(&sb, "\\n");
1778 break;
1779 case '\t':
1780 strbuf_addstr(&sb, "\\t");
1781 break;
1782 case '"':
1783 case '\\':
1784 strbuf_addch(&sb, '\\');
1785 default:
1786 strbuf_addch(&sb, value[i]);
1787 break;
1789 strbuf_addf(&sb, "%s\n", quote);
1791 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1792 strbuf_release(&sb);
1794 return success;
1797 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1798 size_t offset_, int *found_bracket)
1800 size_t equal_offset = size, bracket_offset = size;
1801 ssize_t offset;
1803 contline:
1804 for (offset = offset_-2; offset > 0
1805 && contents[offset] != '\n'; offset--)
1806 switch (contents[offset]) {
1807 case '=': equal_offset = offset; break;
1808 case ']': bracket_offset = offset; break;
1810 if (offset > 0 && contents[offset-1] == '\\') {
1811 offset_ = offset;
1812 goto contline;
1814 if (bracket_offset < equal_offset) {
1815 *found_bracket = 1;
1816 offset = bracket_offset+1;
1817 } else
1818 offset++;
1820 return offset;
1823 int git_config_set_in_file(const char *config_filename,
1824 const char *key, const char *value)
1826 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1829 int git_config_set(const char *key, const char *value)
1831 return git_config_set_multivar(key, value, NULL, 0);
1835 * Auxiliary function to sanity-check and split the key into the section
1836 * identifier and variable name.
1838 * Returns 0 on success, -1 when there is an invalid character in the key and
1839 * -2 if there is no section name in the key.
1841 * store_key - pointer to char* which will hold a copy of the key with
1842 * lowercase section and variable name
1843 * baselen - pointer to int which will hold the length of the
1844 * section + subsection part, can be NULL
1846 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1848 int i, dot, baselen;
1849 const char *last_dot = strrchr(key, '.');
1852 * Since "key" actually contains the section name and the real
1853 * key name separated by a dot, we have to know where the dot is.
1856 if (last_dot == NULL || last_dot == key) {
1857 error("key does not contain a section: %s", key);
1858 return -CONFIG_NO_SECTION_OR_NAME;
1861 if (!last_dot[1]) {
1862 error("key does not contain variable name: %s", key);
1863 return -CONFIG_NO_SECTION_OR_NAME;
1866 baselen = last_dot - key;
1867 if (baselen_)
1868 *baselen_ = baselen;
1871 * Validate the key and while at it, lower case it for matching.
1873 *store_key = xmalloc(strlen(key) + 1);
1875 dot = 0;
1876 for (i = 0; key[i]; i++) {
1877 unsigned char c = key[i];
1878 if (c == '.')
1879 dot = 1;
1880 /* Leave the extended basename untouched.. */
1881 if (!dot || i > baselen) {
1882 if (!iskeychar(c) ||
1883 (i == baselen + 1 && !isalpha(c))) {
1884 error("invalid key: %s", key);
1885 goto out_free_ret_1;
1887 c = tolower(c);
1888 } else if (c == '\n') {
1889 error("invalid key (newline): %s", key);
1890 goto out_free_ret_1;
1892 (*store_key)[i] = c;
1894 (*store_key)[i] = 0;
1896 return 0;
1898 out_free_ret_1:
1899 free(*store_key);
1900 *store_key = NULL;
1901 return -CONFIG_INVALID_KEY;
1905 * If value==NULL, unset in (remove from) config,
1906 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1907 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1908 * (only add a new one)
1909 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1910 * else all matching key/values (regardless how many) are removed,
1911 * before the new pair is written.
1913 * Returns 0 on success.
1915 * This function does this:
1917 * - it locks the config file by creating ".git/config.lock"
1919 * - it then parses the config using store_aux() as validator to find
1920 * the position on the key/value pair to replace. If it is to be unset,
1921 * it must be found exactly once.
1923 * - the config file is mmap()ed and the part before the match (if any) is
1924 * written to the lock file, then the changed part and the rest.
1926 * - the config file is removed and the lock file rename()d to it.
1929 int git_config_set_multivar_in_file(const char *config_filename,
1930 const char *key, const char *value,
1931 const char *value_regex, int multi_replace)
1933 int fd = -1, in_fd;
1934 int ret;
1935 struct lock_file *lock = NULL;
1936 char *filename_buf = NULL;
1938 /* parse-key returns negative; flip the sign to feed exit(3) */
1939 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1940 if (ret)
1941 goto out_free;
1943 store.multi_replace = multi_replace;
1945 if (!config_filename)
1946 config_filename = filename_buf = git_pathdup("config");
1949 * The lock serves a purpose in addition to locking: the new
1950 * contents of .git/config will be written into it.
1952 lock = xcalloc(1, sizeof(struct lock_file));
1953 fd = hold_lock_file_for_update(lock, config_filename, 0);
1954 if (fd < 0) {
1955 error("could not lock config file %s: %s", config_filename, strerror(errno));
1956 free(store.key);
1957 ret = CONFIG_NO_LOCK;
1958 goto out_free;
1962 * If .git/config does not exist yet, write a minimal version.
1964 in_fd = open(config_filename, O_RDONLY);
1965 if ( in_fd < 0 ) {
1966 free(store.key);
1968 if ( ENOENT != errno ) {
1969 error("opening %s: %s", config_filename,
1970 strerror(errno));
1971 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1972 goto out_free;
1974 /* if nothing to unset, error out */
1975 if (value == NULL) {
1976 ret = CONFIG_NOTHING_SET;
1977 goto out_free;
1980 store.key = (char *)key;
1981 if (!store_write_section(fd, key) ||
1982 !store_write_pair(fd, key, value))
1983 goto write_err_out;
1984 } else {
1985 struct stat st;
1986 char *contents;
1987 size_t contents_sz, copy_begin, copy_end;
1988 int i, new_line = 0;
1990 if (value_regex == NULL)
1991 store.value_regex = NULL;
1992 else if (value_regex == CONFIG_REGEX_NONE)
1993 store.value_regex = CONFIG_REGEX_NONE;
1994 else {
1995 if (value_regex[0] == '!') {
1996 store.do_not_match = 1;
1997 value_regex++;
1998 } else
1999 store.do_not_match = 0;
2001 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2002 if (regcomp(store.value_regex, value_regex,
2003 REG_EXTENDED)) {
2004 error("invalid pattern: %s", value_regex);
2005 free(store.value_regex);
2006 ret = CONFIG_INVALID_PATTERN;
2007 goto out_free;
2011 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2012 store.offset[0] = 0;
2013 store.state = START;
2014 store.seen = 0;
2017 * After this, store.offset will contain the *end* offset
2018 * of the last match, or remain at 0 if no match was found.
2019 * As a side effect, we make sure to transform only a valid
2020 * existing config file.
2022 if (git_config_from_file(store_aux, config_filename, NULL)) {
2023 error("invalid config file %s", config_filename);
2024 free(store.key);
2025 if (store.value_regex != NULL &&
2026 store.value_regex != CONFIG_REGEX_NONE) {
2027 regfree(store.value_regex);
2028 free(store.value_regex);
2030 ret = CONFIG_INVALID_FILE;
2031 goto out_free;
2034 free(store.key);
2035 if (store.value_regex != NULL &&
2036 store.value_regex != CONFIG_REGEX_NONE) {
2037 regfree(store.value_regex);
2038 free(store.value_regex);
2041 /* if nothing to unset, or too many matches, error out */
2042 if ((store.seen == 0 && value == NULL) ||
2043 (store.seen > 1 && multi_replace == 0)) {
2044 ret = CONFIG_NOTHING_SET;
2045 goto out_free;
2048 fstat(in_fd, &st);
2049 contents_sz = xsize_t(st.st_size);
2050 contents = xmmap(NULL, contents_sz, PROT_READ,
2051 MAP_PRIVATE, in_fd, 0);
2052 close(in_fd);
2054 if (chmod(lock->filename.buf, st.st_mode & 07777) < 0) {
2055 error("chmod on %s failed: %s",
2056 lock->filename.buf, strerror(errno));
2057 ret = CONFIG_NO_WRITE;
2058 goto out_free;
2061 if (store.seen == 0)
2062 store.seen = 1;
2064 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2065 if (store.offset[i] == 0) {
2066 store.offset[i] = copy_end = contents_sz;
2067 } else if (store.state != KEY_SEEN) {
2068 copy_end = store.offset[i];
2069 } else
2070 copy_end = find_beginning_of_line(
2071 contents, contents_sz,
2072 store.offset[i]-2, &new_line);
2074 if (copy_end > 0 && contents[copy_end-1] != '\n')
2075 new_line = 1;
2077 /* write the first part of the config */
2078 if (copy_end > copy_begin) {
2079 if (write_in_full(fd, contents + copy_begin,
2080 copy_end - copy_begin) <
2081 copy_end - copy_begin)
2082 goto write_err_out;
2083 if (new_line &&
2084 write_str_in_full(fd, "\n") != 1)
2085 goto write_err_out;
2087 copy_begin = store.offset[i];
2090 /* write the pair (value == NULL means unset) */
2091 if (value != NULL) {
2092 if (store.state == START) {
2093 if (!store_write_section(fd, key))
2094 goto write_err_out;
2096 if (!store_write_pair(fd, key, value))
2097 goto write_err_out;
2100 /* write the rest of the config */
2101 if (copy_begin < contents_sz)
2102 if (write_in_full(fd, contents + copy_begin,
2103 contents_sz - copy_begin) <
2104 contents_sz - copy_begin)
2105 goto write_err_out;
2107 munmap(contents, contents_sz);
2110 if (commit_lock_file(lock) < 0) {
2111 error("could not commit config file %s", config_filename);
2112 ret = CONFIG_NO_WRITE;
2113 lock = NULL;
2114 goto out_free;
2118 * lock is committed, so don't try to roll it back below.
2119 * NOTE: Since lockfile.c keeps a linked list of all created
2120 * lock_file structures, it isn't safe to free(lock). It's
2121 * better to just leave it hanging around.
2123 lock = NULL;
2124 ret = 0;
2126 /* Invalidate the config cache */
2127 git_config_clear();
2129 out_free:
2130 if (lock)
2131 rollback_lock_file(lock);
2132 free(filename_buf);
2133 return ret;
2135 write_err_out:
2136 ret = write_error(lock->filename.buf);
2137 goto out_free;
2141 int git_config_set_multivar(const char *key, const char *value,
2142 const char *value_regex, int multi_replace)
2144 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
2145 multi_replace);
2148 static int section_name_match (const char *buf, const char *name)
2150 int i = 0, j = 0, dot = 0;
2151 if (buf[i] != '[')
2152 return 0;
2153 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2154 if (!dot && isspace(buf[i])) {
2155 dot = 1;
2156 if (name[j++] != '.')
2157 break;
2158 for (i++; isspace(buf[i]); i++)
2159 ; /* do nothing */
2160 if (buf[i] != '"')
2161 break;
2162 continue;
2164 if (buf[i] == '\\' && dot)
2165 i++;
2166 else if (buf[i] == '"' && dot) {
2167 for (i++; isspace(buf[i]); i++)
2168 ; /* do_nothing */
2169 break;
2171 if (buf[i] != name[j++])
2172 break;
2174 if (buf[i] == ']' && name[j] == 0) {
2176 * We match, now just find the right length offset by
2177 * gobbling up any whitespace after it, as well
2179 i++;
2180 for (; buf[i] && isspace(buf[i]); i++)
2181 ; /* do nothing */
2182 return i;
2184 return 0;
2187 static int section_name_is_ok(const char *name)
2189 /* Empty section names are bogus. */
2190 if (!*name)
2191 return 0;
2194 * Before a dot, we must be alphanumeric or dash. After the first dot,
2195 * anything goes, so we can stop checking.
2197 for (; *name && *name != '.'; name++)
2198 if (*name != '-' && !isalnum(*name))
2199 return 0;
2200 return 1;
2203 /* if new_name == NULL, the section is removed instead */
2204 int git_config_rename_section_in_file(const char *config_filename,
2205 const char *old_name, const char *new_name)
2207 int ret = 0, remove = 0;
2208 char *filename_buf = NULL;
2209 struct lock_file *lock;
2210 int out_fd;
2211 char buf[1024];
2212 FILE *config_file;
2213 struct stat st;
2215 if (new_name && !section_name_is_ok(new_name)) {
2216 ret = error("invalid section name: %s", new_name);
2217 goto out;
2220 if (!config_filename)
2221 config_filename = filename_buf = git_pathdup("config");
2223 lock = xcalloc(1, sizeof(struct lock_file));
2224 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2225 if (out_fd < 0) {
2226 ret = error("could not lock config file %s", config_filename);
2227 goto out;
2230 if (!(config_file = fopen(config_filename, "rb"))) {
2231 /* no config file means nothing to rename, no error */
2232 goto unlock_and_out;
2235 fstat(fileno(config_file), &st);
2237 if (chmod(lock->filename.buf, st.st_mode & 07777) < 0) {
2238 ret = error("chmod on %s failed: %s",
2239 lock->filename.buf, strerror(errno));
2240 goto out;
2243 while (fgets(buf, sizeof(buf), config_file)) {
2244 int i;
2245 int length;
2246 char *output = buf;
2247 for (i = 0; buf[i] && isspace(buf[i]); i++)
2248 ; /* do nothing */
2249 if (buf[i] == '[') {
2250 /* it's a section */
2251 int offset = section_name_match(&buf[i], old_name);
2252 if (offset > 0) {
2253 ret++;
2254 if (new_name == NULL) {
2255 remove = 1;
2256 continue;
2258 store.baselen = strlen(new_name);
2259 if (!store_write_section(out_fd, new_name)) {
2260 ret = write_error(lock->filename.buf);
2261 goto out;
2264 * We wrote out the new section, with
2265 * a newline, now skip the old
2266 * section's length
2268 output += offset + i;
2269 if (strlen(output) > 0) {
2271 * More content means there's
2272 * a declaration to put on the
2273 * next line; indent with a
2274 * tab
2276 output -= 1;
2277 output[0] = '\t';
2280 remove = 0;
2282 if (remove)
2283 continue;
2284 length = strlen(output);
2285 if (write_in_full(out_fd, output, length) != length) {
2286 ret = write_error(lock->filename.buf);
2287 goto out;
2290 fclose(config_file);
2291 unlock_and_out:
2292 if (commit_lock_file(lock) < 0)
2293 ret = error("could not commit config file %s", config_filename);
2294 out:
2295 free(filename_buf);
2296 return ret;
2299 int git_config_rename_section(const char *old_name, const char *new_name)
2301 return git_config_rename_section_in_file(NULL, old_name, new_name);
2305 * Call this to report error for your variable that should not
2306 * get a boolean value (i.e. "[my] var" means "true").
2308 #undef config_error_nonbool
2309 int config_error_nonbool(const char *var)
2311 return error("Missing value for '%s'", var);
2314 int parse_config_key(const char *var,
2315 const char *section,
2316 const char **subsection, int *subsection_len,
2317 const char **key)
2319 int section_len = strlen(section);
2320 const char *dot;
2322 /* Does it start with "section." ? */
2323 if (!starts_with(var, section) || var[section_len] != '.')
2324 return -1;
2327 * Find the key; we don't know yet if we have a subsection, but we must
2328 * parse backwards from the end, since the subsection may have dots in
2329 * it, too.
2331 dot = strrchr(var, '.');
2332 *key = dot + 1;
2334 /* Did we have a subsection at all? */
2335 if (dot == var + section_len) {
2336 *subsection = NULL;
2337 *subsection_len = 0;
2339 else {
2340 *subsection = var + section_len + 1;
2341 *subsection_len = dot - *subsection;
2344 return 0;