send-email: accept absolute path even on Windows
[git/dscho.git] / config.c
bloba97d0d41c643858c063d236b4f9200ab08e37a20
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 "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
13 #define MAXNAME (256)
15 typedef struct config_file {
16 struct config_file *prev;
17 FILE *f;
18 const char *name;
19 int linenr;
20 int eof;
21 struct strbuf value;
22 char var[MAXNAME];
23 } config_file;
25 static config_file *cf;
27 static int zlib_compression_seen;
29 const char *config_exclusive_filename = NULL;
31 static void lowercase(char *p)
33 for (; *p; p++)
34 *p = tolower(*p);
37 void git_config_push_parameter(const char *text)
39 struct strbuf env = STRBUF_INIT;
40 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
41 if (old) {
42 strbuf_addstr(&env, old);
43 strbuf_addch(&env, ' ');
45 sq_quote_buf(&env, text);
46 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
47 strbuf_release(&env);
50 int git_config_parse_parameter(const char *text,
51 config_fn_t fn, void *data)
53 struct strbuf **pair;
54 pair = strbuf_split_str(text, '=', 2);
55 if (!pair[0])
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);
59 strbuf_trim(pair[0]);
60 if (!pair[0]->len) {
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);
67 return -1;
69 strbuf_list_free(pair);
70 return 0;
73 int git_config_from_parameters(config_fn_t fn, void *data)
75 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
76 char *envw;
77 const char **argv = NULL;
78 int nr = 0, alloc = 0;
79 int i;
81 if (!env)
82 return 0;
83 /* sq_dequote will write over it */
84 envw = xstrdup(env);
86 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
87 free(envw);
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) {
93 free(argv);
94 free(envw);
95 return -1;
99 free(argv);
100 free(envw);
101 return nr > 0;
104 static int get_next_char(void)
106 int c;
107 FILE *f;
109 c = '\n';
110 if (cf && ((f = cf->f) != NULL)) {
111 c = fgetc(f);
112 if (c == '\r') {
113 /* DOS like systems */
114 c = fgetc(f);
115 if (c != '\n') {
116 ungetc(c, f);
117 c = '\r';
120 if (c == '\n')
121 cf->linenr++;
122 if (c == EOF) {
123 cf->eof = 1;
124 c = '\n';
127 return c;
130 static char *parse_value(void)
132 int quote = 0, comment = 0, space = 0;
134 strbuf_reset(&cf->value);
135 for (;;) {
136 int c = get_next_char();
137 if (c == '\n') {
138 if (quote)
139 return NULL;
140 return cf->value.buf;
142 if (comment)
143 continue;
144 if (isspace(c) && !quote) {
145 if (cf->value.len)
146 space++;
147 continue;
149 if (!quote) {
150 if (c == ';' || c == '#') {
151 comment = 1;
152 continue;
155 for (; space; space--)
156 strbuf_addch(&cf->value, ' ');
157 if (c == '\\') {
158 c = get_next_char();
159 switch (c) {
160 case '\n':
161 continue;
162 case 't':
163 c = '\t';
164 break;
165 case 'b':
166 c = '\b';
167 break;
168 case 'n':
169 c = '\n';
170 break;
171 /* Some characters escape as themselves */
172 case '\\': case '"':
173 break;
174 /* Reject unknown escape sequences */
175 default:
176 return NULL;
178 strbuf_addch(&cf->value, c);
179 continue;
181 if (c == '"') {
182 quote = 1-quote;
183 continue;
185 strbuf_addch(&cf->value, c);
189 static inline int iskeychar(int c)
191 return isalnum(c) || c == '-';
194 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
196 int c;
197 char *value;
199 /* Get the full name */
200 for (;;) {
201 c = get_next_char();
202 if (cf->eof)
203 break;
204 if (!iskeychar(c))
205 break;
206 name[len++] = tolower(c);
207 if (len >= MAXNAME)
208 return -1;
210 name[len] = 0;
211 while (c == ' ' || c == '\t')
212 c = get_next_char();
214 value = NULL;
215 if (c != '\n') {
216 if (c != '=')
217 return -1;
218 value = parse_value();
219 if (!value)
220 return -1;
222 return fn(name, value, data);
225 static int get_extended_base_var(char *name, int baselen, int c)
227 do {
228 if (c == '\n')
229 return -1;
230 c = get_next_char();
231 } while (isspace(c));
233 /* We require the format to be '[base "extension"]' */
234 if (c != '"')
235 return -1;
236 name[baselen++] = '.';
238 for (;;) {
239 int c = get_next_char();
240 if (c == '\n')
241 return -1;
242 if (c == '"')
243 break;
244 if (c == '\\') {
245 c = get_next_char();
246 if (c == '\n')
247 return -1;
249 name[baselen++] = c;
250 if (baselen > MAXNAME / 2)
251 return -1;
254 /* Final ']' */
255 if (get_next_char() != ']')
256 return -1;
257 return baselen;
260 static int get_base_var(char *name)
262 int baselen = 0;
264 for (;;) {
265 int c = get_next_char();
266 if (cf->eof)
267 return -1;
268 if (c == ']')
269 return baselen;
270 if (isspace(c))
271 return get_extended_base_var(name, baselen, c);
272 if (!iskeychar(c) && c != '.')
273 return -1;
274 if (baselen > MAXNAME / 2)
275 return -1;
276 name[baselen++] = tolower(c);
280 static int git_parse_file(config_fn_t fn, void *data)
282 int comment = 0;
283 int baselen = 0;
284 char *var = cf->var;
286 /* U+FEFF Byte Order Mark in UTF8 */
287 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
288 const unsigned char *bomptr = utf8_bom;
290 for (;;) {
291 int c = get_next_char();
292 if (bomptr && *bomptr) {
293 /* We are at the file beginning; skip UTF8-encoded BOM
294 * if present. Sane editors won't put this in on their
295 * own, but e.g. Windows Notepad will do it happily. */
296 if ((unsigned char) c == *bomptr) {
297 bomptr++;
298 continue;
299 } else {
300 /* Do not tolerate partial BOM. */
301 if (bomptr != utf8_bom)
302 break;
303 /* No BOM at file beginning. Cool. */
304 bomptr = NULL;
307 if (c == '\n') {
308 if (cf->eof)
309 return 0;
310 comment = 0;
311 continue;
313 if (comment || isspace(c))
314 continue;
315 if (c == '#' || c == ';') {
316 comment = 1;
317 continue;
319 if (c == '[') {
320 baselen = get_base_var(var);
321 if (baselen <= 0)
322 break;
323 var[baselen++] = '.';
324 var[baselen] = 0;
325 continue;
327 if (!isalpha(c))
328 break;
329 var[baselen] = tolower(c);
330 if (get_value(fn, data, var, baselen+1) < 0)
331 break;
333 die("bad config file line %d in %s", cf->linenr, cf->name);
336 static int parse_unit_factor(const char *end, unsigned long *val)
338 if (!*end)
339 return 1;
340 else if (!strcasecmp(end, "k")) {
341 *val *= 1024;
342 return 1;
344 else if (!strcasecmp(end, "m")) {
345 *val *= 1024 * 1024;
346 return 1;
348 else if (!strcasecmp(end, "g")) {
349 *val *= 1024 * 1024 * 1024;
350 return 1;
352 return 0;
355 static int git_parse_long(const char *value, long *ret)
357 if (value && *value) {
358 char *end;
359 long val = strtol(value, &end, 0);
360 unsigned long factor = 1;
361 if (!parse_unit_factor(end, &factor))
362 return 0;
363 *ret = val * factor;
364 return 1;
366 return 0;
369 int git_parse_ulong(const char *value, unsigned long *ret)
371 if (value && *value) {
372 char *end;
373 unsigned long val = strtoul(value, &end, 0);
374 if (!parse_unit_factor(end, &val))
375 return 0;
376 *ret = val;
377 return 1;
379 return 0;
382 static void die_bad_config(const char *name)
384 if (cf && cf->name)
385 die("bad config value for '%s' in %s", name, cf->name);
386 die("bad config value for '%s'", name);
389 int git_config_int(const char *name, const char *value)
391 long ret = 0;
392 if (!git_parse_long(value, &ret))
393 die_bad_config(name);
394 return ret;
397 unsigned long git_config_ulong(const char *name, const char *value)
399 unsigned long ret;
400 if (!git_parse_ulong(value, &ret))
401 die_bad_config(name);
402 return ret;
405 static int git_config_maybe_bool_text(const char *name, const char *value)
407 if (!value)
408 return 1;
409 if (!*value)
410 return 0;
411 if (!strcasecmp(value, "true")
412 || !strcasecmp(value, "yes")
413 || !strcasecmp(value, "on"))
414 return 1;
415 if (!strcasecmp(value, "false")
416 || !strcasecmp(value, "no")
417 || !strcasecmp(value, "off"))
418 return 0;
419 return -1;
422 int git_config_maybe_bool(const char *name, const char *value)
424 long v = git_config_maybe_bool_text(name, value);
425 if (0 <= v)
426 return v;
427 if (git_parse_long(value, &v))
428 return !!v;
429 return -1;
432 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
434 int v = git_config_maybe_bool_text(name, value);
435 if (0 <= v) {
436 *is_bool = 1;
437 return v;
439 *is_bool = 0;
440 return git_config_int(name, value);
443 int git_config_bool(const char *name, const char *value)
445 int discard;
446 return !!git_config_bool_or_int(name, value, &discard);
449 int git_config_string(const char **dest, const char *var, const char *value)
451 if (!value)
452 return config_error_nonbool(var);
453 *dest = xstrdup(value);
454 return 0;
457 int git_config_pathname(const char **dest, const char *var, const char *value)
459 if (!value)
460 return config_error_nonbool(var);
461 *dest = expand_user_path(value);
462 if (!*dest)
463 die("Failed to expand user dir in: '%s'", value);
464 return 0;
467 static int git_default_core_config(const char *var, const char *value)
469 /* This needs a better name */
470 if (!strcmp(var, "core.filemode")) {
471 trust_executable_bit = git_config_bool(var, value);
472 return 0;
474 if (!strcmp(var, "core.trustctime")) {
475 trust_ctime = git_config_bool(var, value);
476 return 0;
479 if (!strcmp(var, "core.quotepath")) {
480 quote_path_fully = git_config_bool(var, value);
481 return 0;
484 if (!strcmp(var, "core.symlinks")) {
485 has_symlinks = git_config_bool(var, value);
486 return 0;
489 if (!strcmp(var, "core.ignorecase")) {
490 ignore_case = git_config_bool(var, value);
491 return 0;
494 if (!strcmp(var, "core.attributesfile"))
495 return git_config_pathname(&git_attributes_file, var, value);
497 if (!strcmp(var, "core.bare")) {
498 is_bare_repository_cfg = git_config_bool(var, value);
499 return 0;
502 if (!strcmp(var, "core.ignorestat")) {
503 assume_unchanged = git_config_bool(var, value);
504 return 0;
507 if (!strcmp(var, "core.prefersymlinkrefs")) {
508 prefer_symlink_refs = git_config_bool(var, value);
509 return 0;
512 if (!strcmp(var, "core.logallrefupdates")) {
513 log_all_ref_updates = git_config_bool(var, value);
514 return 0;
517 if (!strcmp(var, "core.warnambiguousrefs")) {
518 warn_ambiguous_refs = git_config_bool(var, value);
519 return 0;
522 if (!strcmp(var, "core.abbrev")) {
523 int abbrev = git_config_int(var, value);
524 if (abbrev < minimum_abbrev || abbrev > 40)
525 return -1;
526 default_abbrev = abbrev;
527 return 0;
530 if (!strcmp(var, "core.loosecompression")) {
531 int level = git_config_int(var, value);
532 if (level == -1)
533 level = Z_DEFAULT_COMPRESSION;
534 else if (level < 0 || level > Z_BEST_COMPRESSION)
535 die("bad zlib compression level %d", level);
536 zlib_compression_level = level;
537 zlib_compression_seen = 1;
538 return 0;
541 if (!strcmp(var, "core.compression")) {
542 int level = git_config_int(var, value);
543 if (level == -1)
544 level = Z_DEFAULT_COMPRESSION;
545 else if (level < 0 || level > Z_BEST_COMPRESSION)
546 die("bad zlib compression level %d", level);
547 core_compression_level = level;
548 core_compression_seen = 1;
549 if (!zlib_compression_seen)
550 zlib_compression_level = level;
551 return 0;
554 if (!strcmp(var, "core.packedgitwindowsize")) {
555 int pgsz_x2 = getpagesize() * 2;
556 packed_git_window_size = git_config_int(var, value);
558 /* This value must be multiple of (pagesize * 2) */
559 packed_git_window_size /= pgsz_x2;
560 if (packed_git_window_size < 1)
561 packed_git_window_size = 1;
562 packed_git_window_size *= pgsz_x2;
563 return 0;
566 if (!strcmp(var, "core.bigfilethreshold")) {
567 long n = git_config_int(var, value);
568 big_file_threshold = 0 < n ? n : 0;
569 return 0;
572 if (!strcmp(var, "core.packedgitlimit")) {
573 packed_git_limit = git_config_int(var, value);
574 return 0;
577 if (!strcmp(var, "core.deltabasecachelimit")) {
578 delta_base_cache_limit = git_config_int(var, value);
579 return 0;
582 if (!strcmp(var, "core.logpackaccess"))
583 return git_config_string(&log_pack_access, var, value);
585 if (!strcmp(var, "core.autocrlf")) {
586 if (value && !strcasecmp(value, "input")) {
587 if (core_eol == EOL_CRLF)
588 return error("core.autocrlf=input conflicts with core.eol=crlf");
589 auto_crlf = AUTO_CRLF_INPUT;
590 return 0;
592 auto_crlf = git_config_bool(var, value);
593 return 0;
596 if (!strcmp(var, "core.safecrlf")) {
597 if (value && !strcasecmp(value, "warn")) {
598 safe_crlf = SAFE_CRLF_WARN;
599 return 0;
601 safe_crlf = git_config_bool(var, value);
602 return 0;
605 if (!strcmp(var, "core.eol")) {
606 if (value && !strcasecmp(value, "lf"))
607 core_eol = EOL_LF;
608 else if (value && !strcasecmp(value, "crlf"))
609 core_eol = EOL_CRLF;
610 else if (value && !strcasecmp(value, "native"))
611 core_eol = EOL_NATIVE;
612 else
613 core_eol = EOL_UNSET;
614 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
615 return error("core.autocrlf=input conflicts with core.eol=crlf");
616 return 0;
619 if (!strcmp(var, "core.notesref")) {
620 notes_ref_name = xstrdup(value);
621 return 0;
624 if (!strcmp(var, "core.pager"))
625 return git_config_string(&pager_program, var, value);
627 if (!strcmp(var, "core.editor"))
628 return git_config_string(&editor_program, var, value);
630 if (!strcmp(var, "core.askpass"))
631 return git_config_string(&askpass_program, var, value);
633 if (!strcmp(var, "core.excludesfile"))
634 return git_config_pathname(&excludes_file, var, value);
636 if (!strcmp(var, "core.whitespace")) {
637 if (!value)
638 return config_error_nonbool(var);
639 whitespace_rule_cfg = parse_whitespace_rule(value);
640 return 0;
643 if (!strcmp(var, "core.fsyncobjectfiles")) {
644 fsync_object_files = git_config_bool(var, value);
645 return 0;
648 if (!strcmp(var, "core.preloadindex")) {
649 core_preload_index = git_config_bool(var, value);
650 return 0;
653 if (!strcmp(var, "core.createobject")) {
654 if (!strcmp(value, "rename"))
655 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
656 else if (!strcmp(value, "link"))
657 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
658 else
659 die("Invalid mode for object creation: %s", value);
660 return 0;
663 if (!strcmp(var, "core.sparsecheckout")) {
664 core_apply_sparse_checkout = git_config_bool(var, value);
665 return 0;
668 if (!strcmp(var, "core.hidedotfiles")) {
669 if (value && !strcasecmp(value, "dotgitonly")) {
670 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
671 return 0;
673 hide_dotfiles = git_config_bool(var, value);
674 return 0;
677 /* Add other config variables here and to Documentation/config.txt. */
678 return 0;
681 static int git_default_user_config(const char *var, const char *value)
683 if (!strcmp(var, "user.name")) {
684 if (!value)
685 return config_error_nonbool(var);
686 strlcpy(git_default_name, value, sizeof(git_default_name));
687 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
688 return 0;
691 if (!strcmp(var, "user.email")) {
692 if (!value)
693 return config_error_nonbool(var);
694 strlcpy(git_default_email, value, sizeof(git_default_email));
695 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
696 return 0;
699 /* Add other config variables here and to Documentation/config.txt. */
700 return 0;
703 static int git_default_i18n_config(const char *var, const char *value)
705 if (!strcmp(var, "i18n.commitencoding"))
706 return git_config_string(&git_commit_encoding, var, value);
708 if (!strcmp(var, "i18n.logoutputencoding"))
709 return git_config_string(&git_log_output_encoding, var, value);
711 /* Add other config variables here and to Documentation/config.txt. */
712 return 0;
715 static int git_default_branch_config(const char *var, const char *value)
717 if (!strcmp(var, "branch.autosetupmerge")) {
718 if (value && !strcasecmp(value, "always")) {
719 git_branch_track = BRANCH_TRACK_ALWAYS;
720 return 0;
722 git_branch_track = git_config_bool(var, value);
723 return 0;
725 if (!strcmp(var, "branch.autosetuprebase")) {
726 if (!value)
727 return config_error_nonbool(var);
728 else if (!strcmp(value, "never"))
729 autorebase = AUTOREBASE_NEVER;
730 else if (!strcmp(value, "local"))
731 autorebase = AUTOREBASE_LOCAL;
732 else if (!strcmp(value, "remote"))
733 autorebase = AUTOREBASE_REMOTE;
734 else if (!strcmp(value, "always"))
735 autorebase = AUTOREBASE_ALWAYS;
736 else
737 return error("Malformed value for %s", var);
738 return 0;
741 /* Add other config variables here and to Documentation/config.txt. */
742 return 0;
745 static int git_default_push_config(const char *var, const char *value)
747 if (!strcmp(var, "push.default")) {
748 if (!value)
749 return config_error_nonbool(var);
750 else if (!strcmp(value, "nothing"))
751 push_default = PUSH_DEFAULT_NOTHING;
752 else if (!strcmp(value, "matching"))
753 push_default = PUSH_DEFAULT_MATCHING;
754 else if (!strcmp(value, "upstream"))
755 push_default = PUSH_DEFAULT_UPSTREAM;
756 else if (!strcmp(value, "tracking")) /* deprecated */
757 push_default = PUSH_DEFAULT_UPSTREAM;
758 else if (!strcmp(value, "current"))
759 push_default = PUSH_DEFAULT_CURRENT;
760 else {
761 error("Malformed value for %s: %s", var, value);
762 return error("Must be one of nothing, matching, "
763 "tracking or current.");
765 return 0;
768 /* Add other config variables here and to Documentation/config.txt. */
769 return 0;
772 static int git_default_mailmap_config(const char *var, const char *value)
774 if (!strcmp(var, "mailmap.file"))
775 return git_config_string(&git_mailmap_file, var, value);
777 /* Add other config variables here and to Documentation/config.txt. */
778 return 0;
781 int git_default_config(const char *var, const char *value, void *dummy)
783 if (!prefixcmp(var, "core."))
784 return git_default_core_config(var, value);
786 if (!prefixcmp(var, "user."))
787 return git_default_user_config(var, value);
789 if (!prefixcmp(var, "i18n."))
790 return git_default_i18n_config(var, value);
792 if (!prefixcmp(var, "branch."))
793 return git_default_branch_config(var, value);
795 if (!prefixcmp(var, "push."))
796 return git_default_push_config(var, value);
798 if (!prefixcmp(var, "mailmap."))
799 return git_default_mailmap_config(var, value);
801 if (!prefixcmp(var, "advice."))
802 return git_default_advice_config(var, value);
804 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
805 pager_use_color = git_config_bool(var,value);
806 return 0;
809 /* Add other config variables here and to Documentation/config.txt. */
810 return 0;
813 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
815 int ret;
816 FILE *f = fopen(filename, "r");
818 ret = -1;
819 if (f) {
820 config_file top;
822 /* push config-file parsing state stack */
823 top.prev = cf;
824 top.f = f;
825 top.name = filename;
826 top.linenr = 1;
827 top.eof = 0;
828 strbuf_init(&top.value, 1024);
829 cf = &top;
831 ret = git_parse_file(fn, data);
833 /* pop config-file parsing state stack */
834 strbuf_release(&top.value);
835 cf = top.prev;
837 fclose(f);
839 return ret;
842 const char *git_etc_gitconfig(void)
844 static const char *system_wide;
845 if (!system_wide)
846 system_wide = system_path(ETC_GITCONFIG);
847 return system_wide;
850 int git_env_bool(const char *k, int def)
852 const char *v = getenv(k);
853 return v ? git_config_bool(k, v) : def;
856 int git_config_system(void)
858 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
861 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
863 int ret = 0, found = 0;
864 const char *home = NULL;
866 /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
867 if (config_exclusive_filename)
868 return git_config_from_file(fn, config_exclusive_filename, data);
869 if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
870 ret += git_config_from_file(fn, git_etc_gitconfig(),
871 data);
872 found += 1;
875 home = getenv("HOME");
876 if (home) {
877 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
878 if (!access(user_config, R_OK)) {
879 ret += git_config_from_file(fn, user_config, data);
880 found += 1;
882 free(user_config);
885 if (repo_config && !access(repo_config, R_OK)) {
886 ret += git_config_from_file(fn, repo_config, data);
887 found += 1;
890 switch (git_config_from_parameters(fn, data)) {
891 case -1: /* error */
892 die("unable to parse command-line config");
893 break;
894 case 0: /* found nothing */
895 break;
896 default: /* found at least one item */
897 found++;
898 break;
901 return ret == 0 ? found : ret;
904 int git_config(config_fn_t fn, void *data)
906 char *repo_config = NULL;
907 int ret;
909 repo_config = git_pathdup("config");
910 ret = git_config_early(fn, data, repo_config);
911 if (repo_config)
912 free(repo_config);
913 return ret;
917 * Find all the stuff for git_config_set() below.
920 #define MAX_MATCHES 512
922 static struct {
923 int baselen;
924 char *key;
925 int do_not_match;
926 regex_t *value_regex;
927 int multi_replace;
928 size_t offset[MAX_MATCHES];
929 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
930 int seen;
931 } store;
933 static int matches(const char *key, const char *value)
935 return !strcmp(key, store.key) &&
936 (store.value_regex == NULL ||
937 (store.do_not_match ^
938 !regexec(store.value_regex, value, 0, NULL, 0)));
941 static int store_aux(const char *key, const char *value, void *cb)
943 const char *ep;
944 size_t section_len;
945 FILE *f = cf->f;
947 switch (store.state) {
948 case KEY_SEEN:
949 if (matches(key, value)) {
950 if (store.seen == 1 && store.multi_replace == 0) {
951 warning("%s has multiple values", key);
952 } else if (store.seen >= MAX_MATCHES) {
953 error("too many matches for %s", key);
954 return 1;
957 store.offset[store.seen] = ftell(f);
958 store.seen++;
960 break;
961 case SECTION_SEEN:
963 * What we are looking for is in store.key (both
964 * section and var), and its section part is baselen
965 * long. We found key (again, both section and var).
966 * We would want to know if this key is in the same
967 * section as what we are looking for. We already
968 * know we are in the same section as what should
969 * hold store.key.
971 ep = strrchr(key, '.');
972 section_len = ep - key;
974 if ((section_len != store.baselen) ||
975 memcmp(key, store.key, section_len+1)) {
976 store.state = SECTION_END_SEEN;
977 break;
981 * Do not increment matches: this is no match, but we
982 * just made sure we are in the desired section.
984 store.offset[store.seen] = ftell(f);
985 /* fallthru */
986 case SECTION_END_SEEN:
987 case START:
988 if (matches(key, value)) {
989 store.offset[store.seen] = ftell(f);
990 store.state = KEY_SEEN;
991 store.seen++;
992 } else {
993 if (strrchr(key, '.') - key == store.baselen &&
994 !strncmp(key, store.key, store.baselen)) {
995 store.state = SECTION_SEEN;
996 store.offset[store.seen] = ftell(f);
1000 return 0;
1003 static int write_error(const char *filename)
1005 error("failed to write new configuration file %s", filename);
1007 /* Same error code as "failed to rename". */
1008 return 4;
1011 static int store_write_section(int fd, const char *key)
1013 const char *dot;
1014 int i, success;
1015 struct strbuf sb = STRBUF_INIT;
1017 dot = memchr(key, '.', store.baselen);
1018 if (dot) {
1019 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1020 for (i = dot - key + 1; i < store.baselen; i++) {
1021 if (key[i] == '"' || key[i] == '\\')
1022 strbuf_addch(&sb, '\\');
1023 strbuf_addch(&sb, key[i]);
1025 strbuf_addstr(&sb, "\"]\n");
1026 } else {
1027 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1030 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1031 strbuf_release(&sb);
1033 return success;
1036 static int store_write_pair(int fd, const char *key, const char *value)
1038 int i, success;
1039 int length = strlen(key + store.baselen + 1);
1040 const char *quote = "";
1041 struct strbuf sb = STRBUF_INIT;
1044 * Check to see if the value needs to be surrounded with a dq pair.
1045 * Note that problematic characters are always backslash-quoted; this
1046 * check is about not losing leading or trailing SP and strings that
1047 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1048 * configuration parser.
1050 if (value[0] == ' ')
1051 quote = "\"";
1052 for (i = 0; value[i]; i++)
1053 if (value[i] == ';' || value[i] == '#')
1054 quote = "\"";
1055 if (i && value[i - 1] == ' ')
1056 quote = "\"";
1058 strbuf_addf(&sb, "\t%.*s = %s",
1059 length, key + store.baselen + 1, quote);
1061 for (i = 0; value[i]; i++)
1062 switch (value[i]) {
1063 case '\n':
1064 strbuf_addstr(&sb, "\\n");
1065 break;
1066 case '\t':
1067 strbuf_addstr(&sb, "\\t");
1068 break;
1069 case '"':
1070 case '\\':
1071 strbuf_addch(&sb, '\\');
1072 default:
1073 strbuf_addch(&sb, value[i]);
1074 break;
1076 strbuf_addf(&sb, "%s\n", quote);
1078 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1079 strbuf_release(&sb);
1081 return success;
1084 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1085 size_t offset_, int *found_bracket)
1087 size_t equal_offset = size, bracket_offset = size;
1088 ssize_t offset;
1090 contline:
1091 for (offset = offset_-2; offset > 0
1092 && contents[offset] != '\n'; offset--)
1093 switch (contents[offset]) {
1094 case '=': equal_offset = offset; break;
1095 case ']': bracket_offset = offset; break;
1097 if (offset > 0 && contents[offset-1] == '\\') {
1098 offset_ = offset;
1099 goto contline;
1101 if (bracket_offset < equal_offset) {
1102 *found_bracket = 1;
1103 offset = bracket_offset+1;
1104 } else
1105 offset++;
1107 return offset;
1110 int git_config_set_in_file(const char *config_filename,
1111 const char *key, const char *value)
1113 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1116 int git_config_set(const char *key, const char *value)
1118 return git_config_set_multivar(key, value, NULL, 0);
1122 * Auxiliary function to sanity-check and split the key into the section
1123 * identifier and variable name.
1125 * Returns 0 on success, -1 when there is an invalid character in the key and
1126 * -2 if there is no section name in the key.
1128 * store_key - pointer to char* which will hold a copy of the key with
1129 * lowercase section and variable name
1130 * baselen - pointer to int which will hold the length of the
1131 * section + subsection part, can be NULL
1133 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1135 int i, dot, baselen;
1136 const char *last_dot = strrchr(key, '.');
1139 * Since "key" actually contains the section name and the real
1140 * key name separated by a dot, we have to know where the dot is.
1143 if (last_dot == NULL || last_dot == key) {
1144 error("key does not contain a section: %s", key);
1145 return -CONFIG_NO_SECTION_OR_NAME;
1148 if (!last_dot[1]) {
1149 error("key does not contain variable name: %s", key);
1150 return -CONFIG_NO_SECTION_OR_NAME;
1153 baselen = last_dot - key;
1154 if (baselen_)
1155 *baselen_ = baselen;
1158 * Validate the key and while at it, lower case it for matching.
1160 *store_key = xmalloc(strlen(key) + 1);
1162 dot = 0;
1163 for (i = 0; key[i]; i++) {
1164 unsigned char c = key[i];
1165 if (c == '.')
1166 dot = 1;
1167 /* Leave the extended basename untouched.. */
1168 if (!dot || i > baselen) {
1169 if (!iskeychar(c) ||
1170 (i == baselen + 1 && !isalpha(c))) {
1171 error("invalid key: %s", key);
1172 goto out_free_ret_1;
1174 c = tolower(c);
1175 } else if (c == '\n') {
1176 error("invalid key (newline): %s", key);
1177 goto out_free_ret_1;
1179 (*store_key)[i] = c;
1181 (*store_key)[i] = 0;
1183 return 0;
1185 out_free_ret_1:
1186 free(*store_key);
1187 return -CONFIG_INVALID_KEY;
1191 * If value==NULL, unset in (remove from) config,
1192 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1193 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1194 * else all matching key/values (regardless how many) are removed,
1195 * before the new pair is written.
1197 * Returns 0 on success.
1199 * This function does this:
1201 * - it locks the config file by creating ".git/config.lock"
1203 * - it then parses the config using store_aux() as validator to find
1204 * the position on the key/value pair to replace. If it is to be unset,
1205 * it must be found exactly once.
1207 * - the config file is mmap()ed and the part before the match (if any) is
1208 * written to the lock file, then the changed part and the rest.
1210 * - the config file is removed and the lock file rename()d to it.
1213 int git_config_set_multivar_in_file(const char *config_filename,
1214 const char *key, const char *value,
1215 const char *value_regex, int multi_replace)
1217 int fd = -1, in_fd;
1218 int ret;
1219 struct lock_file *lock = NULL;
1221 /* parse-key returns negative; flip the sign to feed exit(3) */
1222 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1223 if (ret)
1224 goto out_free;
1226 store.multi_replace = multi_replace;
1230 * The lock serves a purpose in addition to locking: the new
1231 * contents of .git/config will be written into it.
1233 lock = xcalloc(sizeof(struct lock_file), 1);
1234 fd = hold_lock_file_for_update(lock, config_filename, 0);
1235 if (fd < 0) {
1236 error("could not lock config file %s: %s", config_filename, strerror(errno));
1237 free(store.key);
1238 ret = CONFIG_NO_LOCK;
1239 goto out_free;
1243 * If .git/config does not exist yet, write a minimal version.
1245 in_fd = open(config_filename, O_RDONLY);
1246 if ( in_fd < 0 ) {
1247 free(store.key);
1249 if ( ENOENT != errno ) {
1250 error("opening %s: %s", config_filename,
1251 strerror(errno));
1252 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1253 goto out_free;
1255 /* if nothing to unset, error out */
1256 if (value == NULL) {
1257 ret = CONFIG_NOTHING_SET;
1258 goto out_free;
1261 store.key = (char *)key;
1262 if (!store_write_section(fd, key) ||
1263 !store_write_pair(fd, key, value))
1264 goto write_err_out;
1265 } else {
1266 struct stat st;
1267 char *contents;
1268 size_t contents_sz, copy_begin, copy_end;
1269 int i, new_line = 0;
1271 if (value_regex == NULL)
1272 store.value_regex = NULL;
1273 else {
1274 if (value_regex[0] == '!') {
1275 store.do_not_match = 1;
1276 value_regex++;
1277 } else
1278 store.do_not_match = 0;
1280 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1281 if (regcomp(store.value_regex, value_regex,
1282 REG_EXTENDED)) {
1283 error("invalid pattern: %s", value_regex);
1284 free(store.value_regex);
1285 ret = CONFIG_INVALID_PATTERN;
1286 goto out_free;
1290 store.offset[0] = 0;
1291 store.state = START;
1292 store.seen = 0;
1295 * After this, store.offset will contain the *end* offset
1296 * of the last match, or remain at 0 if no match was found.
1297 * As a side effect, we make sure to transform only a valid
1298 * existing config file.
1300 if (git_config_from_file(store_aux, config_filename, NULL)) {
1301 error("invalid config file %s", config_filename);
1302 free(store.key);
1303 if (store.value_regex != NULL) {
1304 regfree(store.value_regex);
1305 free(store.value_regex);
1307 ret = CONFIG_INVALID_FILE;
1308 goto out_free;
1311 free(store.key);
1312 if (store.value_regex != NULL) {
1313 regfree(store.value_regex);
1314 free(store.value_regex);
1317 /* if nothing to unset, or too many matches, error out */
1318 if ((store.seen == 0 && value == NULL) ||
1319 (store.seen > 1 && multi_replace == 0)) {
1320 ret = CONFIG_NOTHING_SET;
1321 goto out_free;
1324 fstat(in_fd, &st);
1325 contents_sz = xsize_t(st.st_size);
1326 contents = xmmap(NULL, contents_sz, PROT_READ,
1327 MAP_PRIVATE, in_fd, 0);
1328 close(in_fd);
1330 if (store.seen == 0)
1331 store.seen = 1;
1333 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1334 if (store.offset[i] == 0) {
1335 store.offset[i] = copy_end = contents_sz;
1336 } else if (store.state != KEY_SEEN) {
1337 copy_end = store.offset[i];
1338 } else
1339 copy_end = find_beginning_of_line(
1340 contents, contents_sz,
1341 store.offset[i]-2, &new_line);
1343 if (copy_end > 0 && contents[copy_end-1] != '\n')
1344 new_line = 1;
1346 /* write the first part of the config */
1347 if (copy_end > copy_begin) {
1348 if (write_in_full(fd, contents + copy_begin,
1349 copy_end - copy_begin) <
1350 copy_end - copy_begin)
1351 goto write_err_out;
1352 if (new_line &&
1353 write_str_in_full(fd, "\n") != 1)
1354 goto write_err_out;
1356 copy_begin = store.offset[i];
1359 /* write the pair (value == NULL means unset) */
1360 if (value != NULL) {
1361 if (store.state == START) {
1362 if (!store_write_section(fd, key))
1363 goto write_err_out;
1365 if (!store_write_pair(fd, key, value))
1366 goto write_err_out;
1369 /* write the rest of the config */
1370 if (copy_begin < contents_sz)
1371 if (write_in_full(fd, contents + copy_begin,
1372 contents_sz - copy_begin) <
1373 contents_sz - copy_begin)
1374 goto write_err_out;
1376 munmap(contents, contents_sz);
1379 if (commit_lock_file(lock) < 0) {
1380 error("could not commit config file %s", config_filename);
1381 ret = CONFIG_NO_WRITE;
1382 goto out_free;
1386 * lock is committed, so don't try to roll it back below.
1387 * NOTE: Since lockfile.c keeps a linked list of all created
1388 * lock_file structures, it isn't safe to free(lock). It's
1389 * better to just leave it hanging around.
1391 lock = NULL;
1392 ret = 0;
1394 out_free:
1395 if (lock)
1396 rollback_lock_file(lock);
1397 return ret;
1399 write_err_out:
1400 ret = write_error(lock->filename);
1401 goto out_free;
1405 int git_config_set_multivar(const char *key, const char *value,
1406 const char *value_regex, int multi_replace)
1408 const char *config_filename;
1409 char *buf = NULL;
1410 int ret;
1412 if (config_exclusive_filename)
1413 config_filename = config_exclusive_filename;
1414 else
1415 config_filename = buf = git_pathdup("config");
1417 ret = git_config_set_multivar_in_file(config_filename, key, value,
1418 value_regex, multi_replace);
1419 free(buf);
1420 return ret;
1423 static int section_name_match (const char *buf, const char *name)
1425 int i = 0, j = 0, dot = 0;
1426 if (buf[i] != '[')
1427 return 0;
1428 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1429 if (!dot && isspace(buf[i])) {
1430 dot = 1;
1431 if (name[j++] != '.')
1432 break;
1433 for (i++; isspace(buf[i]); i++)
1434 ; /* do nothing */
1435 if (buf[i] != '"')
1436 break;
1437 continue;
1439 if (buf[i] == '\\' && dot)
1440 i++;
1441 else if (buf[i] == '"' && dot) {
1442 for (i++; isspace(buf[i]); i++)
1443 ; /* do_nothing */
1444 break;
1446 if (buf[i] != name[j++])
1447 break;
1449 if (buf[i] == ']' && name[j] == 0) {
1451 * We match, now just find the right length offset by
1452 * gobbling up any whitespace after it, as well
1454 i++;
1455 for (; buf[i] && isspace(buf[i]); i++)
1456 ; /* do nothing */
1457 return i;
1459 return 0;
1462 /* if new_name == NULL, the section is removed instead */
1463 int git_config_rename_section(const char *old_name, const char *new_name)
1465 int ret = 0, remove = 0;
1466 char *config_filename;
1467 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1468 int out_fd;
1469 char buf[1024];
1470 FILE *config_file;
1472 if (config_exclusive_filename)
1473 config_filename = xstrdup(config_exclusive_filename);
1474 else
1475 config_filename = git_pathdup("config");
1476 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1477 if (out_fd < 0) {
1478 ret = error("could not lock config file %s", config_filename);
1479 goto out;
1482 if (!(config_file = fopen(config_filename, "rb"))) {
1483 /* no config file means nothing to rename, no error */
1484 goto unlock_and_out;
1487 while (fgets(buf, sizeof(buf), config_file)) {
1488 int i;
1489 int length;
1490 char *output = buf;
1491 for (i = 0; buf[i] && isspace(buf[i]); i++)
1492 ; /* do nothing */
1493 if (buf[i] == '[') {
1494 /* it's a section */
1495 int offset = section_name_match(&buf[i], old_name);
1496 if (offset > 0) {
1497 ret++;
1498 if (new_name == NULL) {
1499 remove = 1;
1500 continue;
1502 store.baselen = strlen(new_name);
1503 if (!store_write_section(out_fd, new_name)) {
1504 ret = write_error(lock->filename);
1505 goto out;
1508 * We wrote out the new section, with
1509 * a newline, now skip the old
1510 * section's length
1512 output += offset + i;
1513 if (strlen(output) > 0) {
1515 * More content means there's
1516 * a declaration to put on the
1517 * next line; indent with a
1518 * tab
1520 output -= 1;
1521 output[0] = '\t';
1524 remove = 0;
1526 if (remove)
1527 continue;
1528 length = strlen(output);
1529 if (write_in_full(out_fd, output, length) != length) {
1530 ret = write_error(lock->filename);
1531 goto out;
1534 fclose(config_file);
1535 unlock_and_out:
1536 if (commit_lock_file(lock) < 0)
1537 ret = error("could not commit config file %s", config_filename);
1538 out:
1539 free(config_filename);
1540 return ret;
1544 * Call this to report error for your variable that should not
1545 * get a boolean value (i.e. "[my] var" means "true").
1547 int config_error_nonbool(const char *var)
1549 return error("Missing value for '%s'", var);