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pager: stop loading git_default_config()
[alt-git.git] / config.c
blob1d2331aa085891cb3fe344e030a0fec5cbe62272
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
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"
15 #include "utf8.h"
16
17 struct config_source {
18 struct config_source *prev;
19 union {
20 FILE *file;
21 struct config_buf {
22 const char *buf;
23 size_t len;
24 size_t pos;
25 } buf;
26 } u;
27 const char *origin_type;
28 const char *name;
29 const char *path;
30 int die_on_error;
31 int linenr;
32 int eof;
33 struct strbuf value;
34 struct strbuf var;
35
36 int (*do_fgetc)(struct config_source *c);
37 int (*do_ungetc)(int c, struct config_source *conf);
38 long (*do_ftell)(struct config_source *c);
39 };
40
41 static struct config_source *cf;
42
43 static int zlib_compression_seen;
44
45 /*
46 * Default config_set that contains key-value pairs from the usual set of config
47 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
48 * config file and the global /etc/gitconfig)
49 */
50 static struct config_set the_config_set;
51
52 static int config_file_fgetc(struct config_source *conf)
53 {
54 return getc_unlocked(conf->u.file);
55 }
56
57 static int config_file_ungetc(int c, struct config_source *conf)
58 {
59 return ungetc(c, conf->u.file);
60 }
61
62 static long config_file_ftell(struct config_source *conf)
63 {
64 return ftell(conf->u.file);
65 }
66
67
68 static int config_buf_fgetc(struct config_source *conf)
69 {
70 if (conf->u.buf.pos < conf->u.buf.len)
71 return conf->u.buf.buf[conf->u.buf.pos++];
72
73 return EOF;
74 }
75
76 static int config_buf_ungetc(int c, struct config_source *conf)
77 {
78 if (conf->u.buf.pos > 0) {
79 conf->u.buf.pos--;
80 if (conf->u.buf.buf[conf->u.buf.pos] != c)
81 die("BUG: config_buf can only ungetc the same character");
82 return c;
83 }
84
85 return EOF;
86 }
87
88 static long config_buf_ftell(struct config_source *conf)
89 {
90 return conf->u.buf.pos;
91 }
92
93 #define MAX_INCLUDE_DEPTH 10
94 static const char include_depth_advice[] =
95 "exceeded maximum include depth (%d) while including\n"
96 " %s\n"
97 "from\n"
98 " %s\n"
99 "Do you have circular includes?";
100 static int handle_path_include(const char *path, struct config_include_data *inc)
101 {
102 int ret = 0;
103 struct strbuf buf = STRBUF_INIT;
104 char *expanded;
105
106 if (!path)
107 return config_error_nonbool("include.path");
108
109 expanded = expand_user_path(path);
110 if (!expanded)
111 return error("could not expand include path '%s'", path);
112 path = expanded;
113
114 /*
115 * Use an absolute path as-is, but interpret relative paths
116 * based on the including config file.
117 */
118 if (!is_absolute_path(path)) {
119 char *slash;
120
121 if (!cf || !cf->path)
122 return error("relative config includes must come from files");
123
124 slash = find_last_dir_sep(cf->path);
125 if (slash)
126 strbuf_add(&buf, cf->path, slash - cf->path + 1);
127 strbuf_addstr(&buf, path);
128 path = buf.buf;
129 }
130
131 if (!access_or_die(path, R_OK, 0)) {
132 if (++inc->depth > MAX_INCLUDE_DEPTH)
133 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
134 cf && cf->name ? cf->name : "the command line");
135 ret = git_config_from_file(git_config_include, path, inc);
136 inc->depth--;
137 }
138 strbuf_release(&buf);
139 free(expanded);
140 return ret;
141 }
142
143 int git_config_include(const char *var, const char *value, void *data)
144 {
145 struct config_include_data *inc = data;
146 int ret;
147
148 /*
149 * Pass along all values, including "include" directives; this makes it
150 * possible to query information on the includes themselves.
151 */
152 ret = inc->fn(var, value, inc->data);
153 if (ret < 0)
154 return ret;
155
156 if (!strcmp(var, "include.path"))
157 ret = handle_path_include(value, inc);
158 return ret;
159 }
160
161 void git_config_push_parameter(const char *text)
162 {
163 struct strbuf env = STRBUF_INIT;
164 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
165 if (old) {
166 strbuf_addstr(&env, old);
167 strbuf_addch(&env, ' ');
168 }
169 sq_quote_buf(&env, text);
170 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
171 strbuf_release(&env);
172 }
173
174 int git_config_parse_parameter(const char *text,
175 config_fn_t fn, void *data)
176 {
177 const char *value;
178 struct strbuf **pair;
179
180 pair = strbuf_split_str(text, '=', 2);
181 if (!pair[0])
182 return error("bogus config parameter: %s", text);
183
184 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
185 strbuf_setlen(pair[0], pair[0]->len - 1);
186 value = pair[1] ? pair[1]->buf : "";
187 } else {
188 value = NULL;
189 }
190
191 strbuf_trim(pair[0]);
192 if (!pair[0]->len) {
193 strbuf_list_free(pair);
194 return error("bogus config parameter: %s", text);
195 }
196 strbuf_tolower(pair[0]);
197 if (fn(pair[0]->buf, value, data) < 0) {
198 strbuf_list_free(pair);
199 return -1;
200 }
201 strbuf_list_free(pair);
202 return 0;
203 }
204
205 int git_config_from_parameters(config_fn_t fn, void *data)
206 {
207 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
208 char *envw;
209 const char **argv = NULL;
210 int nr = 0, alloc = 0;
211 int i;
212
213 if (!env)
214 return 0;
215 /* sq_dequote will write over it */
216 envw = xstrdup(env);
217
218 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
219 free(envw);
220 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
221 }
222
223 for (i = 0; i < nr; i++) {
224 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
225 free(argv);
226 free(envw);
227 return -1;
228 }
229 }
230
231 free(argv);
232 free(envw);
233 return nr > 0;
234 }
235
236 static int get_next_char(void)
237 {
238 int c = cf->do_fgetc(cf);
239
240 if (c == '\r') {
241 /* DOS like systems */
242 c = cf->do_fgetc(cf);
243 if (c != '\n') {
244 if (c != EOF)
245 cf->do_ungetc(c, cf);
246 c = '\r';
247 }
248 }
249 if (c == '\n')
250 cf->linenr++;
251 if (c == EOF) {
252 cf->eof = 1;
253 cf->linenr++;
254 c = '\n';
255 }
256 return c;
257 }
258
259 static char *parse_value(void)
260 {
261 int quote = 0, comment = 0, space = 0;
262
263 strbuf_reset(&cf->value);
264 for (;;) {
265 int c = get_next_char();
266 if (c == '\n') {
267 if (quote) {
268 cf->linenr--;
269 return NULL;
270 }
271 return cf->value.buf;
272 }
273 if (comment)
274 continue;
275 if (isspace(c) && !quote) {
276 if (cf->value.len)
277 space++;
278 continue;
279 }
280 if (!quote) {
281 if (c == ';' || c == '#') {
282 comment = 1;
283 continue;
284 }
285 }
286 for (; space; space--)
287 strbuf_addch(&cf->value, ' ');
288 if (c == '\\') {
289 c = get_next_char();
290 switch (c) {
291 case '\n':
292 continue;
293 case 't':
294 c = '\t';
295 break;
296 case 'b':
297 c = '\b';
298 break;
299 case 'n':
300 c = '\n';
301 break;
302 /* Some characters escape as themselves */
303 case '\\': case '"':
304 break;
305 /* Reject unknown escape sequences */
306 default:
307 return NULL;
308 }
309 strbuf_addch(&cf->value, c);
310 continue;
311 }
312 if (c == '"') {
313 quote = 1-quote;
314 continue;
315 }
316 strbuf_addch(&cf->value, c);
317 }
318 }
319
320 static inline int iskeychar(int c)
321 {
322 return isalnum(c) || c == '-';
323 }
324
325 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
326 {
327 int c;
328 char *value;
329 int ret;
330
331 /* Get the full name */
332 for (;;) {
333 c = get_next_char();
334 if (cf->eof)
335 break;
336 if (!iskeychar(c))
337 break;
338 strbuf_addch(name, tolower(c));
339 }
340
341 while (c == ' ' || c == '\t')
342 c = get_next_char();
343
344 value = NULL;
345 if (c != '\n') {
346 if (c != '=')
347 return -1;
348 value = parse_value();
349 if (!value)
350 return -1;
351 }
352 /*
353 * We already consumed the \n, but we need linenr to point to
354 * the line we just parsed during the call to fn to get
355 * accurate line number in error messages.
356 */
357 cf->linenr--;
358 ret = fn(name->buf, value, data);
359 cf->linenr++;
360 return ret;
361 }
362
363 static int get_extended_base_var(struct strbuf *name, int c)
364 {
365 do {
366 if (c == '\n')
367 goto error_incomplete_line;
368 c = get_next_char();
369 } while (isspace(c));
370
371 /* We require the format to be '[base "extension"]' */
372 if (c != '"')
373 return -1;
374 strbuf_addch(name, '.');
375
376 for (;;) {
377 int c = get_next_char();
378 if (c == '\n')
379 goto error_incomplete_line;
380 if (c == '"')
381 break;
382 if (c == '\\') {
383 c = get_next_char();
384 if (c == '\n')
385 goto error_incomplete_line;
386 }
387 strbuf_addch(name, c);
388 }
389
390 /* Final ']' */
391 if (get_next_char() != ']')
392 return -1;
393 return 0;
394 error_incomplete_line:
395 cf->linenr--;
396 return -1;
397 }
398
399 static int get_base_var(struct strbuf *name)
400 {
401 for (;;) {
402 int c = get_next_char();
403 if (cf->eof)
404 return -1;
405 if (c == ']')
406 return 0;
407 if (isspace(c))
408 return get_extended_base_var(name, c);
409 if (!iskeychar(c) && c != '.')
410 return -1;
411 strbuf_addch(name, tolower(c));
412 }
413 }
414
415 static int git_parse_source(config_fn_t fn, void *data)
416 {
417 int comment = 0;
418 int baselen = 0;
419 struct strbuf *var = &cf->var;
420
421 /* U+FEFF Byte Order Mark in UTF8 */
422 const char *bomptr = utf8_bom;
423
424 for (;;) {
425 int c = get_next_char();
426 if (bomptr && *bomptr) {
427 /* We are at the file beginning; skip UTF8-encoded BOM
428 * if present. Sane editors won't put this in on their
429 * own, but e.g. Windows Notepad will do it happily. */
430 if (c == (*bomptr & 0377)) {
431 bomptr++;
432 continue;
433 } else {
434 /* Do not tolerate partial BOM. */
435 if (bomptr != utf8_bom)
436 break;
437 /* No BOM at file beginning. Cool. */
438 bomptr = NULL;
439 }
440 }
441 if (c == '\n') {
442 if (cf->eof)
443 return 0;
444 comment = 0;
445 continue;
446 }
447 if (comment || isspace(c))
448 continue;
449 if (c == '#' || c == ';') {
450 comment = 1;
451 continue;
452 }
453 if (c == '[') {
454 /* Reset prior to determining a new stem */
455 strbuf_reset(var);
456 if (get_base_var(var) < 0 || var->len < 1)
457 break;
458 strbuf_addch(var, '.');
459 baselen = var->len;
460 continue;
461 }
462 if (!isalpha(c))
463 break;
464 /*
465 * Truncate the var name back to the section header
466 * stem prior to grabbing the suffix part of the name
467 * and the value.
468 */
469 strbuf_setlen(var, baselen);
470 strbuf_addch(var, tolower(c));
471 if (get_value(fn, data, var) < 0)
472 break;
473 }
474 if (cf->die_on_error)
475 die(_("bad config line %d in %s %s"), cf->linenr, cf->origin_type, cf->name);
476 else
477 return error(_("bad config line %d in %s %s"), cf->linenr, cf->origin_type, cf->name);
478 }
479
480 static int parse_unit_factor(const char *end, uintmax_t *val)
481 {
482 if (!*end)
483 return 1;
484 else if (!strcasecmp(end, "k")) {
485 *val *= 1024;
486 return 1;
487 }
488 else if (!strcasecmp(end, "m")) {
489 *val *= 1024 * 1024;
490 return 1;
491 }
492 else if (!strcasecmp(end, "g")) {
493 *val *= 1024 * 1024 * 1024;
494 return 1;
495 }
496 return 0;
497 }
498
499 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
500 {
501 if (value && *value) {
502 char *end;
503 intmax_t val;
504 uintmax_t uval;
505 uintmax_t factor = 1;
506
507 errno = 0;
508 val = strtoimax(value, &end, 0);
509 if (errno == ERANGE)
510 return 0;
511 if (!parse_unit_factor(end, &factor)) {
512 errno = EINVAL;
513 return 0;
514 }
515 uval = labs(val);
516 uval *= factor;
517 if (uval > max || labs(val) > uval) {
518 errno = ERANGE;
519 return 0;
520 }
521 val *= factor;
522 *ret = val;
523 return 1;
524 }
525 errno = EINVAL;
526 return 0;
527 }
528
529 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
530 {
531 if (value && *value) {
532 char *end;
533 uintmax_t val;
534 uintmax_t oldval;
535
536 errno = 0;
537 val = strtoumax(value, &end, 0);
538 if (errno == ERANGE)
539 return 0;
540 oldval = val;
541 if (!parse_unit_factor(end, &val)) {
542 errno = EINVAL;
543 return 0;
544 }
545 if (val > max || oldval > val) {
546 errno = ERANGE;
547 return 0;
548 }
549 *ret = val;
550 return 1;
551 }
552 errno = EINVAL;
553 return 0;
554 }
555
556 static int git_parse_int(const char *value, int *ret)
557 {
558 intmax_t tmp;
559 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
560 return 0;
561 *ret = tmp;
562 return 1;
563 }
564
565 static int git_parse_int64(const char *value, int64_t *ret)
566 {
567 intmax_t tmp;
568 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
569 return 0;
570 *ret = tmp;
571 return 1;
572 }
573
574 int git_parse_ulong(const char *value, unsigned long *ret)
575 {
576 uintmax_t tmp;
577 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
578 return 0;
579 *ret = tmp;
580 return 1;
581 }
582
583 NORETURN
584 static void die_bad_number(const char *name, const char *value)
585 {
586 const char *reason = errno == ERANGE ?
587 "out of range" :
588 "invalid unit";
589 if (!value)
590 value = "";
591
592 if (cf && cf->origin_type && cf->name)
593 die(_("bad numeric config value '%s' for '%s' in %s %s: %s"),
594 value, name, cf->origin_type, cf->name, reason);
595 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
596 }
597
598 int git_config_int(const char *name, const char *value)
599 {
600 int ret;
601 if (!git_parse_int(value, &ret))
602 die_bad_number(name, value);
603 return ret;
604 }
605
606 int64_t git_config_int64(const char *name, const char *value)
607 {
608 int64_t ret;
609 if (!git_parse_int64(value, &ret))
610 die_bad_number(name, value);
611 return ret;
612 }
613
614 unsigned long git_config_ulong(const char *name, const char *value)
615 {
616 unsigned long ret;
617 if (!git_parse_ulong(value, &ret))
618 die_bad_number(name, value);
619 return ret;
620 }
621
622 int git_parse_maybe_bool(const char *value)
623 {
624 if (!value)
625 return 1;
626 if (!*value)
627 return 0;
628 if (!strcasecmp(value, "true")
629 || !strcasecmp(value, "yes")
630 || !strcasecmp(value, "on"))
631 return 1;
632 if (!strcasecmp(value, "false")
633 || !strcasecmp(value, "no")
634 || !strcasecmp(value, "off"))
635 return 0;
636 return -1;
637 }
638
639 int git_config_maybe_bool(const char *name, const char *value)
640 {
641 int v = git_parse_maybe_bool(value);
642 if (0 <= v)
643 return v;
644 if (git_parse_int(value, &v))
645 return !!v;
646 return -1;
647 }
648
649 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
650 {
651 int v = git_parse_maybe_bool(value);
652 if (0 <= v) {
653 *is_bool = 1;
654 return v;
655 }
656 *is_bool = 0;
657 return git_config_int(name, value);
658 }
659
660 int git_config_bool(const char *name, const char *value)
661 {
662 int discard;
663 return !!git_config_bool_or_int(name, value, &discard);
664 }
665
666 int git_config_string(const char **dest, const char *var, const char *value)
667 {
668 if (!value)
669 return config_error_nonbool(var);
670 *dest = xstrdup(value);
671 return 0;
672 }
673
674 int git_config_pathname(const char **dest, const char *var, const char *value)
675 {
676 if (!value)
677 return config_error_nonbool(var);
678 *dest = expand_user_path(value);
679 if (!*dest)
680 die(_("failed to expand user dir in: '%s'"), value);
681 return 0;
682 }
683
684 static int git_default_core_config(const char *var, const char *value)
685 {
686 /* This needs a better name */
687 if (!strcmp(var, "core.filemode")) {
688 trust_executable_bit = git_config_bool(var, value);
689 return 0;
690 }
691 if (!strcmp(var, "core.trustctime")) {
692 trust_ctime = git_config_bool(var, value);
693 return 0;
694 }
695 if (!strcmp(var, "core.checkstat")) {
696 if (!strcasecmp(value, "default"))
697 check_stat = 1;
698 else if (!strcasecmp(value, "minimal"))
699 check_stat = 0;
700 }
701
702 if (!strcmp(var, "core.quotepath")) {
703 quote_path_fully = git_config_bool(var, value);
704 return 0;
705 }
706
707 if (!strcmp(var, "core.symlinks")) {
708 has_symlinks = git_config_bool(var, value);
709 return 0;
710 }
711
712 if (!strcmp(var, "core.ignorecase")) {
713 ignore_case = git_config_bool(var, value);
714 return 0;
715 }
716
717 if (!strcmp(var, "core.attributesfile"))
718 return git_config_pathname(&git_attributes_file, var, value);
719
720 if (!strcmp(var, "core.bare")) {
721 is_bare_repository_cfg = git_config_bool(var, value);
722 return 0;
723 }
724
725 if (!strcmp(var, "core.ignorestat")) {
726 assume_unchanged = git_config_bool(var, value);
727 return 0;
728 }
729
730 if (!strcmp(var, "core.prefersymlinkrefs")) {
731 prefer_symlink_refs = git_config_bool(var, value);
732 return 0;
733 }
734
735 if (!strcmp(var, "core.logallrefupdates")) {
736 log_all_ref_updates = git_config_bool(var, value);
737 return 0;
738 }
739
740 if (!strcmp(var, "core.warnambiguousrefs")) {
741 warn_ambiguous_refs = git_config_bool(var, value);
742 return 0;
743 }
744
745 if (!strcmp(var, "core.abbrev")) {
746 int abbrev = git_config_int(var, value);
747 if (abbrev < minimum_abbrev || abbrev > 40)
748 return -1;
749 default_abbrev = abbrev;
750 return 0;
751 }
752
753 if (!strcmp(var, "core.loosecompression")) {
754 int level = git_config_int(var, value);
755 if (level == -1)
756 level = Z_DEFAULT_COMPRESSION;
757 else if (level < 0 || level > Z_BEST_COMPRESSION)
758 die(_("bad zlib compression level %d"), level);
759 zlib_compression_level = level;
760 zlib_compression_seen = 1;
761 return 0;
762 }
763
764 if (!strcmp(var, "core.compression")) {
765 int level = git_config_int(var, value);
766 if (level == -1)
767 level = Z_DEFAULT_COMPRESSION;
768 else if (level < 0 || level > Z_BEST_COMPRESSION)
769 die(_("bad zlib compression level %d"), level);
770 core_compression_level = level;
771 core_compression_seen = 1;
772 if (!zlib_compression_seen)
773 zlib_compression_level = level;
774 return 0;
775 }
776
777 if (!strcmp(var, "core.packedgitwindowsize")) {
778 int pgsz_x2 = getpagesize() * 2;
779 packed_git_window_size = git_config_ulong(var, value);
780
781 /* This value must be multiple of (pagesize * 2) */
782 packed_git_window_size /= pgsz_x2;
783 if (packed_git_window_size < 1)
784 packed_git_window_size = 1;
785 packed_git_window_size *= pgsz_x2;
786 return 0;
787 }
788
789 if (!strcmp(var, "core.bigfilethreshold")) {
790 big_file_threshold = git_config_ulong(var, value);
791 return 0;
792 }
793
794 if (!strcmp(var, "core.packedgitlimit")) {
795 packed_git_limit = git_config_ulong(var, value);
796 return 0;
797 }
798
799 if (!strcmp(var, "core.deltabasecachelimit")) {
800 delta_base_cache_limit = git_config_ulong(var, value);
801 return 0;
802 }
803
804 if (!strcmp(var, "core.autocrlf")) {
805 if (value && !strcasecmp(value, "input")) {
806 auto_crlf = AUTO_CRLF_INPUT;
807 return 0;
808 }
809 auto_crlf = git_config_bool(var, value);
810 return 0;
811 }
812
813 if (!strcmp(var, "core.safecrlf")) {
814 if (value && !strcasecmp(value, "warn")) {
815 safe_crlf = SAFE_CRLF_WARN;
816 return 0;
817 }
818 safe_crlf = git_config_bool(var, value);
819 return 0;
820 }
821
822 if (!strcmp(var, "core.eol")) {
823 if (value && !strcasecmp(value, "lf"))
824 core_eol = EOL_LF;
825 else if (value && !strcasecmp(value, "crlf"))
826 core_eol = EOL_CRLF;
827 else if (value && !strcasecmp(value, "native"))
828 core_eol = EOL_NATIVE;
829 else
830 core_eol = EOL_UNSET;
831 return 0;
832 }
833
834 if (!strcmp(var, "core.notesref")) {
835 notes_ref_name = xstrdup(value);
836 return 0;
837 }
838
839 if (!strcmp(var, "core.editor"))
840 return git_config_string(&editor_program, var, value);
841
842 if (!strcmp(var, "core.commentchar")) {
843 if (!value)
844 return config_error_nonbool(var);
845 else if (!strcasecmp(value, "auto"))
846 auto_comment_line_char = 1;
847 else if (value[0] && !value[1]) {
848 comment_line_char = value[0];
849 auto_comment_line_char = 0;
850 } else
851 return error("core.commentChar should only be one character");
852 return 0;
853 }
854
855 if (!strcmp(var, "core.askpass"))
856 return git_config_string(&askpass_program, var, value);
857
858 if (!strcmp(var, "core.excludesfile"))
859 return git_config_pathname(&excludes_file, var, value);
860
861 if (!strcmp(var, "core.whitespace")) {
862 if (!value)
863 return config_error_nonbool(var);
864 whitespace_rule_cfg = parse_whitespace_rule(value);
865 return 0;
866 }
867
868 if (!strcmp(var, "core.fsyncobjectfiles")) {
869 fsync_object_files = git_config_bool(var, value);
870 return 0;
871 }
872
873 if (!strcmp(var, "core.preloadindex")) {
874 core_preload_index = git_config_bool(var, value);
875 return 0;
876 }
877
878 if (!strcmp(var, "core.createobject")) {
879 if (!strcmp(value, "rename"))
880 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
881 else if (!strcmp(value, "link"))
882 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
883 else
884 die(_("invalid mode for object creation: %s"), value);
885 return 0;
886 }
887
888 if (!strcmp(var, "core.sparsecheckout")) {
889 core_apply_sparse_checkout = git_config_bool(var, value);
890 return 0;
891 }
892
893 if (!strcmp(var, "core.precomposeunicode")) {
894 precomposed_unicode = git_config_bool(var, value);
895 return 0;
896 }
897
898 if (!strcmp(var, "core.protecthfs")) {
899 protect_hfs = git_config_bool(var, value);
900 return 0;
901 }
902
903 if (!strcmp(var, "core.protectntfs")) {
904 protect_ntfs = git_config_bool(var, value);
905 return 0;
906 }
907
908 if (!strcmp(var, "core.hidedotfiles")) {
909 if (value && !strcasecmp(value, "dotgitonly"))
910 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
911 else
912 hide_dotfiles = git_config_bool(var, value);
913 return 0;
914 }
915
916 /* Add other config variables here and to Documentation/config.txt. */
917 return 0;
918 }
919
920 static int git_default_i18n_config(const char *var, const char *value)
921 {
922 if (!strcmp(var, "i18n.commitencoding"))
923 return git_config_string(&git_commit_encoding, var, value);
924
925 if (!strcmp(var, "i18n.logoutputencoding"))
926 return git_config_string(&git_log_output_encoding, var, value);
927
928 /* Add other config variables here and to Documentation/config.txt. */
929 return 0;
930 }
931
932 static int git_default_branch_config(const char *var, const char *value)
933 {
934 if (!strcmp(var, "branch.autosetupmerge")) {
935 if (value && !strcasecmp(value, "always")) {
936 git_branch_track = BRANCH_TRACK_ALWAYS;
937 return 0;
938 }
939 git_branch_track = git_config_bool(var, value);
940 return 0;
941 }
942 if (!strcmp(var, "branch.autosetuprebase")) {
943 if (!value)
944 return config_error_nonbool(var);
945 else if (!strcmp(value, "never"))
946 autorebase = AUTOREBASE_NEVER;
947 else if (!strcmp(value, "local"))
948 autorebase = AUTOREBASE_LOCAL;
949 else if (!strcmp(value, "remote"))
950 autorebase = AUTOREBASE_REMOTE;
951 else if (!strcmp(value, "always"))
952 autorebase = AUTOREBASE_ALWAYS;
953 else
954 return error("malformed value for %s", var);
955 return 0;
956 }
957
958 /* Add other config variables here and to Documentation/config.txt. */
959 return 0;
960 }
961
962 static int git_default_push_config(const char *var, const char *value)
963 {
964 if (!strcmp(var, "push.default")) {
965 if (!value)
966 return config_error_nonbool(var);
967 else if (!strcmp(value, "nothing"))
968 push_default = PUSH_DEFAULT_NOTHING;
969 else if (!strcmp(value, "matching"))
970 push_default = PUSH_DEFAULT_MATCHING;
971 else if (!strcmp(value, "simple"))
972 push_default = PUSH_DEFAULT_SIMPLE;
973 else if (!strcmp(value, "upstream"))
974 push_default = PUSH_DEFAULT_UPSTREAM;
975 else if (!strcmp(value, "tracking")) /* deprecated */
976 push_default = PUSH_DEFAULT_UPSTREAM;
977 else if (!strcmp(value, "current"))
978 push_default = PUSH_DEFAULT_CURRENT;
979 else {
980 error("malformed value for %s: %s", var, value);
981 return error("Must be one of nothing, matching, simple, "
982 "upstream or current.");
983 }
984 return 0;
985 }
986
987 /* Add other config variables here and to Documentation/config.txt. */
988 return 0;
989 }
990
991 static int git_default_mailmap_config(const char *var, const char *value)
992 {
993 if (!strcmp(var, "mailmap.file"))
994 return git_config_pathname(&git_mailmap_file, var, value);
995 if (!strcmp(var, "mailmap.blob"))
996 return git_config_string(&git_mailmap_blob, var, value);
997
998 /* Add other config variables here and to Documentation/config.txt. */
999 return 0;
1000 }
1001
1002 int git_default_config(const char *var, const char *value, void *dummy)
1003 {
1004 if (starts_with(var, "core."))
1005 return git_default_core_config(var, value);
1006
1007 if (starts_with(var, "user."))
1008 return git_ident_config(var, value, dummy);
1009
1010 if (starts_with(var, "i18n."))
1011 return git_default_i18n_config(var, value);
1012
1013 if (starts_with(var, "branch."))
1014 return git_default_branch_config(var, value);
1015
1016 if (starts_with(var, "push."))
1017 return git_default_push_config(var, value);
1018
1019 if (starts_with(var, "mailmap."))
1020 return git_default_mailmap_config(var, value);
1021
1022 if (starts_with(var, "advice."))
1023 return git_default_advice_config(var, value);
1024
1025 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1026 pager_use_color = git_config_bool(var,value);
1027 return 0;
1028 }
1029
1030 if (!strcmp(var, "pack.packsizelimit")) {
1031 pack_size_limit_cfg = git_config_ulong(var, value);
1032 return 0;
1033 }
1034 /* Add other config variables here and to Documentation/config.txt. */
1035 return 0;
1036 }
1037
1038 /*
1039 * All source specific fields in the union, die_on_error, name and the callbacks
1040 * fgetc, ungetc, ftell of top need to be initialized before calling
1041 * this function.
1042 */
1043 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1044 {
1045 int ret;
1046
1047 /* push config-file parsing state stack */
1048 top->prev = cf;
1049 top->linenr = 1;
1050 top->eof = 0;
1051 strbuf_init(&top->value, 1024);
1052 strbuf_init(&top->var, 1024);
1053 cf = top;
1054
1055 ret = git_parse_source(fn, data);
1056
1057 /* pop config-file parsing state stack */
1058 strbuf_release(&top->value);
1059 strbuf_release(&top->var);
1060 cf = top->prev;
1061
1062 return ret;
1063 }
1064
1065 static int do_config_from_file(config_fn_t fn,
1066 const char *origin_type, const char *name, const char *path, FILE *f,
1067 void *data)
1068 {
1069 struct config_source top;
1070
1071 top.u.file = f;
1072 top.origin_type = origin_type;
1073 top.name = name;
1074 top.path = path;
1075 top.die_on_error = 1;
1076 top.do_fgetc = config_file_fgetc;
1077 top.do_ungetc = config_file_ungetc;
1078 top.do_ftell = config_file_ftell;
1079
1080 return do_config_from(&top, fn, data);
1081 }
1082
1083 static int git_config_from_stdin(config_fn_t fn, void *data)
1084 {
1085 return do_config_from_file(fn, "standard input", "", NULL, stdin, data);
1086 }
1087
1088 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1089 {
1090 int ret = -1;
1091 FILE *f;
1092
1093 f = fopen(filename, "r");
1094 if (f) {
1095 flockfile(f);
1096 ret = do_config_from_file(fn, "file", filename, filename, f, data);
1097 funlockfile(f);
1098 fclose(f);
1099 }
1100 return ret;
1101 }
1102
1103 int git_config_from_mem(config_fn_t fn, const char *origin_type,
1104 const char *name, const char *buf, size_t len, void *data)
1105 {
1106 struct config_source top;
1107
1108 top.u.buf.buf = buf;
1109 top.u.buf.len = len;
1110 top.u.buf.pos = 0;
1111 top.origin_type = origin_type;
1112 top.name = name;
1113 top.path = NULL;
1114 top.die_on_error = 0;
1115 top.do_fgetc = config_buf_fgetc;
1116 top.do_ungetc = config_buf_ungetc;
1117 top.do_ftell = config_buf_ftell;
1118
1119 return do_config_from(&top, fn, data);
1120 }
1121
1122 static int git_config_from_blob_sha1(config_fn_t fn,
1123 const char *name,
1124 const unsigned char *sha1,
1125 void *data)
1126 {
1127 enum object_type type;
1128 char *buf;
1129 unsigned long size;
1130 int ret;
1131
1132 buf = read_sha1_file(sha1, &type, &size);
1133 if (!buf)
1134 return error("unable to load config blob object '%s'", name);
1135 if (type != OBJ_BLOB) {
1136 free(buf);
1137 return error("reference '%s' does not point to a blob", name);
1138 }
1139
1140 ret = git_config_from_mem(fn, "blob", name, buf, size, data);
1141 free(buf);
1142
1143 return ret;
1144 }
1145
1146 static int git_config_from_blob_ref(config_fn_t fn,
1147 const char *name,
1148 void *data)
1149 {
1150 unsigned char sha1[20];
1151
1152 if (get_sha1(name, sha1) < 0)
1153 return error("unable to resolve config blob '%s'", name);
1154 return git_config_from_blob_sha1(fn, name, sha1, data);
1155 }
1156
1157 const char *git_etc_gitconfig(void)
1158 {
1159 static const char *system_wide;
1160 if (!system_wide)
1161 system_wide = system_path(ETC_GITCONFIG);
1162 return system_wide;
1163 }
1164
1165 /*
1166 * Parse environment variable 'k' as a boolean (in various
1167 * possible spellings); if missing, use the default value 'def'.
1168 */
1169 int git_env_bool(const char *k, int def)
1170 {
1171 const char *v = getenv(k);
1172 return v ? git_config_bool(k, v) : def;
1173 }
1174
1175 /*
1176 * Parse environment variable 'k' as ulong with possibly a unit
1177 * suffix; if missing, use the default value 'val'.
1178 */
1179 unsigned long git_env_ulong(const char *k, unsigned long val)
1180 {
1181 const char *v = getenv(k);
1182 if (v && !git_parse_ulong(v, &val))
1183 die("failed to parse %s", k);
1184 return val;
1185 }
1186
1187 int git_config_system(void)
1188 {
1189 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1190 }
1191
1192 static int do_git_config_sequence(config_fn_t fn, void *data)
1193 {
1194 int ret = 0, found = 0;
1195 char *xdg_config = xdg_config_home("config");
1196 char *user_config = expand_user_path("~/.gitconfig");
1197 char *repo_config = git_pathdup("config");
1198
1199 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1200 ret += git_config_from_file(fn, git_etc_gitconfig(),
1201 data);
1202 found += 1;
1203 }
1204
1205 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1206 ret += git_config_from_file(fn, xdg_config, data);
1207 found += 1;
1208 }
1209
1210 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1211 ret += git_config_from_file(fn, user_config, data);
1212 found += 1;
1213 }
1214
1215 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1216 ret += git_config_from_file(fn, repo_config, data);
1217 found += 1;
1218 }
1219
1220 switch (git_config_from_parameters(fn, data)) {
1221 case -1: /* error */
1222 die(_("unable to parse command-line config"));
1223 break;
1224 case 0: /* found nothing */
1225 break;
1226 default: /* found at least one item */
1227 found++;
1228 break;
1229 }
1230
1231 free(xdg_config);
1232 free(user_config);
1233 free(repo_config);
1234 return ret == 0 ? found : ret;
1235 }
1236
1237 int git_config_with_options(config_fn_t fn, void *data,
1238 struct git_config_source *config_source,
1239 int respect_includes)
1240 {
1241 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1242
1243 if (respect_includes) {
1244 inc.fn = fn;
1245 inc.data = data;
1246 fn = git_config_include;
1247 data = &inc;
1248 }
1249
1250 /*
1251 * If we have a specific filename, use it. Otherwise, follow the
1252 * regular lookup sequence.
1253 */
1254 if (config_source && config_source->use_stdin)
1255 return git_config_from_stdin(fn, data);
1256 else if (config_source && config_source->file)
1257 return git_config_from_file(fn, config_source->file, data);
1258 else if (config_source && config_source->blob)
1259 return git_config_from_blob_ref(fn, config_source->blob, data);
1260
1261 return do_git_config_sequence(fn, data);
1262 }
1263
1264 static void git_config_raw(config_fn_t fn, void *data)
1265 {
1266 if (git_config_with_options(fn, data, NULL, 1) < 0)
1267 /*
1268 * git_config_with_options() normally returns only
1269 * positive values, as most errors are fatal, and
1270 * non-fatal potential errors are guarded by "if"
1271 * statements that are entered only when no error is
1272 * possible.
1273 *
1274 * If we ever encounter a non-fatal error, it means
1275 * something went really wrong and we should stop
1276 * immediately.
1277 */
1278 die(_("unknown error occured while reading the configuration files"));
1279 }
1280
1281 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1282 {
1283 int i, value_index;
1284 struct string_list *values;
1285 struct config_set_element *entry;
1286 struct configset_list *list = &cs->list;
1287 struct key_value_info *kv_info;
1288
1289 for (i = 0; i < list->nr; i++) {
1290 entry = list->items[i].e;
1291 value_index = list->items[i].value_index;
1292 values = &entry->value_list;
1293 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1294 kv_info = values->items[value_index].util;
1295 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1296 }
1297 }
1298 }
1299
1300 static void git_config_check_init(void);
1301
1302 void git_config(config_fn_t fn, void *data)
1303 {
1304 git_config_check_init();
1305 configset_iter(&the_config_set, fn, data);
1306 }
1307
1308 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1309 {
1310 struct config_set_element k;
1311 struct config_set_element *found_entry;
1312 char *normalized_key;
1313 /*
1314 * `key` may come from the user, so normalize it before using it
1315 * for querying entries from the hashmap.
1316 */
1317 if (git_config_parse_key(key, &normalized_key, NULL))
1318 return NULL;
1319
1320 hashmap_entry_init(&k, strhash(normalized_key));
1321 k.key = normalized_key;
1322 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1323 free(normalized_key);
1324 return found_entry;
1325 }
1326
1327 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1328 {
1329 struct config_set_element *e;
1330 struct string_list_item *si;
1331 struct configset_list_item *l_item;
1332 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1333
1334 e = configset_find_element(cs, key);
1335 /*
1336 * Since the keys are being fed by git_config*() callback mechanism, they
1337 * are already normalized. So simply add them without any further munging.
1338 */
1339 if (!e) {
1340 e = xmalloc(sizeof(*e));
1341 hashmap_entry_init(e, strhash(key));
1342 e->key = xstrdup(key);
1343 string_list_init(&e->value_list, 1);
1344 hashmap_add(&cs->config_hash, e);
1345 }
1346 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1347
1348 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1349 l_item = &cs->list.items[cs->list.nr++];
1350 l_item->e = e;
1351 l_item->value_index = e->value_list.nr - 1;
1352
1353 if (cf) {
1354 kv_info->filename = strintern(cf->name);
1355 kv_info->linenr = cf->linenr;
1356 } else {
1357 /* for values read from `git_config_from_parameters()` */
1358 kv_info->filename = NULL;
1359 kv_info->linenr = -1;
1360 }
1361 si->util = kv_info;
1362
1363 return 0;
1364 }
1365
1366 static int config_set_element_cmp(const struct config_set_element *e1,
1367 const struct config_set_element *e2, const void *unused)
1368 {
1369 return strcmp(e1->key, e2->key);
1370 }
1371
1372 void git_configset_init(struct config_set *cs)
1373 {
1374 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1375 cs->hash_initialized = 1;
1376 cs->list.nr = 0;
1377 cs->list.alloc = 0;
1378 cs->list.items = NULL;
1379 }
1380
1381 void git_configset_clear(struct config_set *cs)
1382 {
1383 struct config_set_element *entry;
1384 struct hashmap_iter iter;
1385 if (!cs->hash_initialized)
1386 return;
1387
1388 hashmap_iter_init(&cs->config_hash, &iter);
1389 while ((entry = hashmap_iter_next(&iter))) {
1390 free(entry->key);
1391 string_list_clear(&entry->value_list, 1);
1392 }
1393 hashmap_free(&cs->config_hash, 1);
1394 cs->hash_initialized = 0;
1395 free(cs->list.items);
1396 cs->list.nr = 0;
1397 cs->list.alloc = 0;
1398 cs->list.items = NULL;
1399 }
1400
1401 static int config_set_callback(const char *key, const char *value, void *cb)
1402 {
1403 struct config_set *cs = cb;
1404 configset_add_value(cs, key, value);
1405 return 0;
1406 }
1407
1408 int git_configset_add_file(struct config_set *cs, const char *filename)
1409 {
1410 return git_config_from_file(config_set_callback, filename, cs);
1411 }
1412
1413 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1414 {
1415 const struct string_list *values = NULL;
1416 /*
1417 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1418 * queried key in the files of the configset, the value returned will be the last
1419 * value in the value list for that key.
1420 */
1421 values = git_configset_get_value_multi(cs, key);
1422
1423 if (!values)
1424 return 1;
1425 assert(values->nr > 0);
1426 *value = values->items[values->nr - 1].string;
1427 return 0;
1428 }
1429
1430 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1431 {
1432 struct config_set_element *e = configset_find_element(cs, key);
1433 return e ? &e->value_list : NULL;
1434 }
1435
1436 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1437 {
1438 const char *value;
1439 if (!git_configset_get_value(cs, key, &value))
1440 return git_config_string(dest, key, value);
1441 else
1442 return 1;
1443 }
1444
1445 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1446 {
1447 return git_configset_get_string_const(cs, key, (const char **)dest);
1448 }
1449
1450 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1451 {
1452 const char *value;
1453 if (!git_configset_get_value(cs, key, &value)) {
1454 *dest = git_config_int(key, value);
1455 return 0;
1456 } else
1457 return 1;
1458 }
1459
1460 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1461 {
1462 const char *value;
1463 if (!git_configset_get_value(cs, key, &value)) {
1464 *dest = git_config_ulong(key, value);
1465 return 0;
1466 } else
1467 return 1;
1468 }
1469
1470 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1471 {
1472 const char *value;
1473 if (!git_configset_get_value(cs, key, &value)) {
1474 *dest = git_config_bool(key, value);
1475 return 0;
1476 } else
1477 return 1;
1478 }
1479
1480 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1481 int *is_bool, int *dest)
1482 {
1483 const char *value;
1484 if (!git_configset_get_value(cs, key, &value)) {
1485 *dest = git_config_bool_or_int(key, value, is_bool);
1486 return 0;
1487 } else
1488 return 1;
1489 }
1490
1491 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1492 {
1493 const char *value;
1494 if (!git_configset_get_value(cs, key, &value)) {
1495 *dest = git_config_maybe_bool(key, value);
1496 if (*dest == -1)
1497 return -1;
1498 return 0;
1499 } else
1500 return 1;
1501 }
1502
1503 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1504 {
1505 const char *value;
1506 if (!git_configset_get_value(cs, key, &value))
1507 return git_config_pathname(dest, key, value);
1508 else
1509 return 1;
1510 }
1511
1512 static void git_config_check_init(void)
1513 {
1514 if (the_config_set.hash_initialized)
1515 return;
1516 git_configset_init(&the_config_set);
1517 git_config_raw(config_set_callback, &the_config_set);
1518 }
1519
1520 void git_config_clear(void)
1521 {
1522 if (!the_config_set.hash_initialized)
1523 return;
1524 git_configset_clear(&the_config_set);
1525 }
1526
1527 int git_config_get_value(const char *key, const char **value)
1528 {
1529 git_config_check_init();
1530 return git_configset_get_value(&the_config_set, key, value);
1531 }
1532
1533 const struct string_list *git_config_get_value_multi(const char *key)
1534 {
1535 git_config_check_init();
1536 return git_configset_get_value_multi(&the_config_set, key);
1537 }
1538
1539 int git_config_get_string_const(const char *key, const char **dest)
1540 {
1541 int ret;
1542 git_config_check_init();
1543 ret = git_configset_get_string_const(&the_config_set, key, dest);
1544 if (ret < 0)
1545 git_die_config(key, NULL);
1546 return ret;
1547 }
1548
1549 int git_config_get_string(const char *key, char **dest)
1550 {
1551 git_config_check_init();
1552 return git_config_get_string_const(key, (const char **)dest);
1553 }
1554
1555 int git_config_get_int(const char *key, int *dest)
1556 {
1557 git_config_check_init();
1558 return git_configset_get_int(&the_config_set, key, dest);
1559 }
1560
1561 int git_config_get_ulong(const char *key, unsigned long *dest)
1562 {
1563 git_config_check_init();
1564 return git_configset_get_ulong(&the_config_set, key, dest);
1565 }
1566
1567 int git_config_get_bool(const char *key, int *dest)
1568 {
1569 git_config_check_init();
1570 return git_configset_get_bool(&the_config_set, key, dest);
1571 }
1572
1573 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1574 {
1575 git_config_check_init();
1576 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1577 }
1578
1579 int git_config_get_maybe_bool(const char *key, int *dest)
1580 {
1581 git_config_check_init();
1582 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1583 }
1584
1585 int git_config_get_pathname(const char *key, const char **dest)
1586 {
1587 int ret;
1588 git_config_check_init();
1589 ret = git_configset_get_pathname(&the_config_set, key, dest);
1590 if (ret < 0)
1591 git_die_config(key, NULL);
1592 return ret;
1593 }
1594
1595 int git_config_get_untracked_cache(void)
1596 {
1597 int val = -1;
1598 const char *v;
1599
1600 /* Hack for test programs like test-dump-untracked-cache */
1601 if (ignore_untracked_cache_config)
1602 return -1;
1603
1604 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1605 return val;
1606
1607 if (!git_config_get_value("core.untrackedcache", &v)) {
1608 if (!strcasecmp(v, "keep"))
1609 return -1;
1610
1611 error("unknown core.untrackedCache value '%s'; "
1612 "using 'keep' default value", v);
1613 return -1;
1614 }
1615
1616 return -1; /* default value */
1617 }
1618
1619 NORETURN
1620 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1621 {
1622 if (!filename)
1623 die(_("unable to parse '%s' from command-line config"), key);
1624 else
1625 die(_("bad config variable '%s' in file '%s' at line %d"),
1626 key, filename, linenr);
1627 }
1628
1629 NORETURN __attribute__((format(printf, 2, 3)))
1630 void git_die_config(const char *key, const char *err, ...)
1631 {
1632 const struct string_list *values;
1633 struct key_value_info *kv_info;
1634
1635 if (err) {
1636 va_list params;
1637 va_start(params, err);
1638 vreportf("error: ", err, params);
1639 va_end(params);
1640 }
1641 values = git_config_get_value_multi(key);
1642 kv_info = values->items[values->nr - 1].util;
1643 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1644 }
1645
1646 /*
1647 * Find all the stuff for git_config_set() below.
1648 */
1649
1650 static struct {
1651 int baselen;
1652 char *key;
1653 int do_not_match;
1654 regex_t *value_regex;
1655 int multi_replace;
1656 size_t *offset;
1657 unsigned int offset_alloc;
1658 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1659 int seen;
1660 } store;
1661
1662 static int matches(const char *key, const char *value)
1663 {
1664 if (strcmp(key, store.key))
1665 return 0; /* not ours */
1666 if (!store.value_regex)
1667 return 1; /* always matches */
1668 if (store.value_regex == CONFIG_REGEX_NONE)
1669 return 0; /* never matches */
1670
1671 return store.do_not_match ^
1672 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1673 }
1674
1675 static int store_aux(const char *key, const char *value, void *cb)
1676 {
1677 const char *ep;
1678 size_t section_len;
1679
1680 switch (store.state) {
1681 case KEY_SEEN:
1682 if (matches(key, value)) {
1683 if (store.seen == 1 && store.multi_replace == 0) {
1684 warning(_("%s has multiple values"), key);
1685 }
1686
1687 ALLOC_GROW(store.offset, store.seen + 1,
1688 store.offset_alloc);
1689
1690 store.offset[store.seen] = cf->do_ftell(cf);
1691 store.seen++;
1692 }
1693 break;
1694 case SECTION_SEEN:
1695 /*
1696 * What we are looking for is in store.key (both
1697 * section and var), and its section part is baselen
1698 * long. We found key (again, both section and var).
1699 * We would want to know if this key is in the same
1700 * section as what we are looking for. We already
1701 * know we are in the same section as what should
1702 * hold store.key.
1703 */
1704 ep = strrchr(key, '.');
1705 section_len = ep - key;
1706
1707 if ((section_len != store.baselen) ||
1708 memcmp(key, store.key, section_len+1)) {
1709 store.state = SECTION_END_SEEN;
1710 break;
1711 }
1712
1713 /*
1714 * Do not increment matches: this is no match, but we
1715 * just made sure we are in the desired section.
1716 */
1717 ALLOC_GROW(store.offset, store.seen + 1,
1718 store.offset_alloc);
1719 store.offset[store.seen] = cf->do_ftell(cf);
1720 /* fallthru */
1721 case SECTION_END_SEEN:
1722 case START:
1723 if (matches(key, value)) {
1724 ALLOC_GROW(store.offset, store.seen + 1,
1725 store.offset_alloc);
1726 store.offset[store.seen] = cf->do_ftell(cf);
1727 store.state = KEY_SEEN;
1728 store.seen++;
1729 } else {
1730 if (strrchr(key, '.') - key == store.baselen &&
1731 !strncmp(key, store.key, store.baselen)) {
1732 store.state = SECTION_SEEN;
1733 ALLOC_GROW(store.offset,
1734 store.seen + 1,
1735 store.offset_alloc);
1736 store.offset[store.seen] = cf->do_ftell(cf);
1737 }
1738 }
1739 }
1740 return 0;
1741 }
1742
1743 static int write_error(const char *filename)
1744 {
1745 error("failed to write new configuration file %s", filename);
1746
1747 /* Same error code as "failed to rename". */
1748 return 4;
1749 }
1750
1751 static int store_write_section(int fd, const char *key)
1752 {
1753 const char *dot;
1754 int i, success;
1755 struct strbuf sb = STRBUF_INIT;
1756
1757 dot = memchr(key, '.', store.baselen);
1758 if (dot) {
1759 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1760 for (i = dot - key + 1; i < store.baselen; i++) {
1761 if (key[i] == '"' || key[i] == '\\')
1762 strbuf_addch(&sb, '\\');
1763 strbuf_addch(&sb, key[i]);
1764 }
1765 strbuf_addstr(&sb, "\"]\n");
1766 } else {
1767 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1768 }
1769
1770 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1771 strbuf_release(&sb);
1772
1773 return success;
1774 }
1775
1776 static int store_write_pair(int fd, const char *key, const char *value)
1777 {
1778 int i, success;
1779 int length = strlen(key + store.baselen + 1);
1780 const char *quote = "";
1781 struct strbuf sb = STRBUF_INIT;
1782
1783 /*
1784 * Check to see if the value needs to be surrounded with a dq pair.
1785 * Note that problematic characters are always backslash-quoted; this
1786 * check is about not losing leading or trailing SP and strings that
1787 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1788 * configuration parser.
1789 */
1790 if (value[0] == ' ')
1791 quote = "\"";
1792 for (i = 0; value[i]; i++)
1793 if (value[i] == ';' || value[i] == '#')
1794 quote = "\"";
1795 if (i && value[i - 1] == ' ')
1796 quote = "\"";
1797
1798 strbuf_addf(&sb, "\t%.*s = %s",
1799 length, key + store.baselen + 1, quote);
1800
1801 for (i = 0; value[i]; i++)
1802 switch (value[i]) {
1803 case '\n':
1804 strbuf_addstr(&sb, "\\n");
1805 break;
1806 case '\t':
1807 strbuf_addstr(&sb, "\\t");
1808 break;
1809 case '"':
1810 case '\\':
1811 strbuf_addch(&sb, '\\');
1812 default:
1813 strbuf_addch(&sb, value[i]);
1814 break;
1815 }
1816 strbuf_addf(&sb, "%s\n", quote);
1817
1818 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1819 strbuf_release(&sb);
1820
1821 return success;
1822 }
1823
1824 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1825 size_t offset_, int *found_bracket)
1826 {
1827 size_t equal_offset = size, bracket_offset = size;
1828 ssize_t offset;
1829
1830 contline:
1831 for (offset = offset_-2; offset > 0
1832 && contents[offset] != '\n'; offset--)
1833 switch (contents[offset]) {
1834 case '=': equal_offset = offset; break;
1835 case ']': bracket_offset = offset; break;
1836 }
1837 if (offset > 0 && contents[offset-1] == '\\') {
1838 offset_ = offset;
1839 goto contline;
1840 }
1841 if (bracket_offset < equal_offset) {
1842 *found_bracket = 1;
1843 offset = bracket_offset+1;
1844 } else
1845 offset++;
1846
1847 return offset;
1848 }
1849
1850 int git_config_set_in_file_gently(const char *config_filename,
1851 const char *key, const char *value)
1852 {
1853 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
1854 }
1855
1856 void git_config_set_in_file(const char *config_filename,
1857 const char *key, const char *value)
1858 {
1859 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1860 }
1861
1862 int git_config_set_gently(const char *key, const char *value)
1863 {
1864 return git_config_set_multivar_gently(key, value, NULL, 0);
1865 }
1866
1867 void git_config_set(const char *key, const char *value)
1868 {
1869 git_config_set_multivar(key, value, NULL, 0);
1870 }
1871
1872 /*
1873 * Auxiliary function to sanity-check and split the key into the section
1874 * identifier and variable name.
1875 *
1876 * Returns 0 on success, -1 when there is an invalid character in the key and
1877 * -2 if there is no section name in the key.
1878 *
1879 * store_key - pointer to char* which will hold a copy of the key with
1880 * lowercase section and variable name
1881 * baselen - pointer to int which will hold the length of the
1882 * section + subsection part, can be NULL
1883 */
1884 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
1885 {
1886 int i, dot, baselen;
1887 const char *last_dot = strrchr(key, '.');
1888
1889 /*
1890 * Since "key" actually contains the section name and the real
1891 * key name separated by a dot, we have to know where the dot is.
1892 */
1893
1894 if (last_dot == NULL || last_dot == key) {
1895 if (!quiet)
1896 error("key does not contain a section: %s", key);
1897 return -CONFIG_NO_SECTION_OR_NAME;
1898 }
1899
1900 if (!last_dot[1]) {
1901 if (!quiet)
1902 error("key does not contain variable name: %s", key);
1903 return -CONFIG_NO_SECTION_OR_NAME;
1904 }
1905
1906 baselen = last_dot - key;
1907 if (baselen_)
1908 *baselen_ = baselen;
1909
1910 /*
1911 * Validate the key and while at it, lower case it for matching.
1912 */
1913 if (store_key)
1914 *store_key = xmallocz(strlen(key));
1915
1916 dot = 0;
1917 for (i = 0; key[i]; i++) {
1918 unsigned char c = key[i];
1919 if (c == '.')
1920 dot = 1;
1921 /* Leave the extended basename untouched.. */
1922 if (!dot || i > baselen) {
1923 if (!iskeychar(c) ||
1924 (i == baselen + 1 && !isalpha(c))) {
1925 if (!quiet)
1926 error("invalid key: %s", key);
1927 goto out_free_ret_1;
1928 }
1929 c = tolower(c);
1930 } else if (c == '\n') {
1931 if (!quiet)
1932 error("invalid key (newline): %s", key);
1933 goto out_free_ret_1;
1934 }
1935 if (store_key)
1936 (*store_key)[i] = c;
1937 }
1938
1939 return 0;
1940
1941 out_free_ret_1:
1942 if (store_key) {
1943 free(*store_key);
1944 *store_key = NULL;
1945 }
1946 return -CONFIG_INVALID_KEY;
1947 }
1948
1949 int git_config_parse_key(const char *key, char **store_key, int *baselen)
1950 {
1951 return git_config_parse_key_1(key, store_key, baselen, 0);
1952 }
1953
1954 int git_config_key_is_valid(const char *key)
1955 {
1956 return !git_config_parse_key_1(key, NULL, NULL, 1);
1957 }
1958
1959 /*
1960 * If value==NULL, unset in (remove from) config,
1961 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1962 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1963 * (only add a new one)
1964 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1965 * else all matching key/values (regardless how many) are removed,
1966 * before the new pair is written.
1967 *
1968 * Returns 0 on success.
1969 *
1970 * This function does this:
1971 *
1972 * - it locks the config file by creating ".git/config.lock"
1973 *
1974 * - it then parses the config using store_aux() as validator to find
1975 * the position on the key/value pair to replace. If it is to be unset,
1976 * it must be found exactly once.
1977 *
1978 * - the config file is mmap()ed and the part before the match (if any) is
1979 * written to the lock file, then the changed part and the rest.
1980 *
1981 * - the config file is removed and the lock file rename()d to it.
1982 *
1983 */
1984 int git_config_set_multivar_in_file_gently(const char *config_filename,
1985 const char *key, const char *value,
1986 const char *value_regex,
1987 int multi_replace)
1988 {
1989 int fd = -1, in_fd = -1;
1990 int ret;
1991 struct lock_file *lock = NULL;
1992 char *filename_buf = NULL;
1993 char *contents = NULL;
1994 size_t contents_sz;
1995
1996 /* parse-key returns negative; flip the sign to feed exit(3) */
1997 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1998 if (ret)
1999 goto out_free;
2000
2001 store.multi_replace = multi_replace;
2002
2003 if (!config_filename)
2004 config_filename = filename_buf = git_pathdup("config");
2005
2006 /*
2007 * The lock serves a purpose in addition to locking: the new
2008 * contents of .git/config will be written into it.
2009 */
2010 lock = xcalloc(1, sizeof(struct lock_file));
2011 fd = hold_lock_file_for_update(lock, config_filename, 0);
2012 if (fd < 0) {
2013 error("could not lock config file %s: %s", config_filename, strerror(errno));
2014 free(store.key);
2015 ret = CONFIG_NO_LOCK;
2016 goto out_free;
2017 }
2018
2019 /*
2020 * If .git/config does not exist yet, write a minimal version.
2021 */
2022 in_fd = open(config_filename, O_RDONLY);
2023 if ( in_fd < 0 ) {
2024 free(store.key);
2025
2026 if ( ENOENT != errno ) {
2027 error("opening %s: %s", config_filename,
2028 strerror(errno));
2029 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2030 goto out_free;
2031 }
2032 /* if nothing to unset, error out */
2033 if (value == NULL) {
2034 ret = CONFIG_NOTHING_SET;
2035 goto out_free;
2036 }
2037
2038 store.key = (char *)key;
2039 if (!store_write_section(fd, key) ||
2040 !store_write_pair(fd, key, value))
2041 goto write_err_out;
2042 } else {
2043 struct stat st;
2044 size_t copy_begin, copy_end;
2045 int i, new_line = 0;
2046
2047 if (value_regex == NULL)
2048 store.value_regex = NULL;
2049 else if (value_regex == CONFIG_REGEX_NONE)
2050 store.value_regex = CONFIG_REGEX_NONE;
2051 else {
2052 if (value_regex[0] == '!') {
2053 store.do_not_match = 1;
2054 value_regex++;
2055 } else
2056 store.do_not_match = 0;
2057
2058 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2059 if (regcomp(store.value_regex, value_regex,
2060 REG_EXTENDED)) {
2061 error("invalid pattern: %s", value_regex);
2062 free(store.value_regex);
2063 ret = CONFIG_INVALID_PATTERN;
2064 goto out_free;
2065 }
2066 }
2067
2068 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2069 store.offset[0] = 0;
2070 store.state = START;
2071 store.seen = 0;
2072
2073 /*
2074 * After this, store.offset will contain the *end* offset
2075 * of the last match, or remain at 0 if no match was found.
2076 * As a side effect, we make sure to transform only a valid
2077 * existing config file.
2078 */
2079 if (git_config_from_file(store_aux, config_filename, NULL)) {
2080 error("invalid config file %s", config_filename);
2081 free(store.key);
2082 if (store.value_regex != NULL &&
2083 store.value_regex != CONFIG_REGEX_NONE) {
2084 regfree(store.value_regex);
2085 free(store.value_regex);
2086 }
2087 ret = CONFIG_INVALID_FILE;
2088 goto out_free;
2089 }
2090
2091 free(store.key);
2092 if (store.value_regex != NULL &&
2093 store.value_regex != CONFIG_REGEX_NONE) {
2094 regfree(store.value_regex);
2095 free(store.value_regex);
2096 }
2097
2098 /* if nothing to unset, or too many matches, error out */
2099 if ((store.seen == 0 && value == NULL) ||
2100 (store.seen > 1 && multi_replace == 0)) {
2101 ret = CONFIG_NOTHING_SET;
2102 goto out_free;
2103 }
2104
2105 fstat(in_fd, &st);
2106 contents_sz = xsize_t(st.st_size);
2107 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2108 MAP_PRIVATE, in_fd, 0);
2109 if (contents == MAP_FAILED) {
2110 if (errno == ENODEV && S_ISDIR(st.st_mode))
2111 errno = EISDIR;
2112 error("unable to mmap '%s': %s",
2113 config_filename, strerror(errno));
2114 ret = CONFIG_INVALID_FILE;
2115 contents = NULL;
2116 goto out_free;
2117 }
2118 close(in_fd);
2119 in_fd = -1;
2120
2121 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2122 error("chmod on %s failed: %s",
2123 get_lock_file_path(lock), strerror(errno));
2124 ret = CONFIG_NO_WRITE;
2125 goto out_free;
2126 }
2127
2128 if (store.seen == 0)
2129 store.seen = 1;
2130
2131 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2132 if (store.offset[i] == 0) {
2133 store.offset[i] = copy_end = contents_sz;
2134 } else if (store.state != KEY_SEEN) {
2135 copy_end = store.offset[i];
2136 } else
2137 copy_end = find_beginning_of_line(
2138 contents, contents_sz,
2139 store.offset[i]-2, &new_line);
2140
2141 if (copy_end > 0 && contents[copy_end-1] != '\n')
2142 new_line = 1;
2143
2144 /* write the first part of the config */
2145 if (copy_end > copy_begin) {
2146 if (write_in_full(fd, contents + copy_begin,
2147 copy_end - copy_begin) <
2148 copy_end - copy_begin)
2149 goto write_err_out;
2150 if (new_line &&
2151 write_str_in_full(fd, "\n") != 1)
2152 goto write_err_out;
2153 }
2154 copy_begin = store.offset[i];
2155 }
2156
2157 /* write the pair (value == NULL means unset) */
2158 if (value != NULL) {
2159 if (store.state == START) {
2160 if (!store_write_section(fd, key))
2161 goto write_err_out;
2162 }
2163 if (!store_write_pair(fd, key, value))
2164 goto write_err_out;
2165 }
2166
2167 /* write the rest of the config */
2168 if (copy_begin < contents_sz)
2169 if (write_in_full(fd, contents + copy_begin,
2170 contents_sz - copy_begin) <
2171 contents_sz - copy_begin)
2172 goto write_err_out;
2173
2174 munmap(contents, contents_sz);
2175 contents = NULL;
2176 }
2177
2178 if (commit_lock_file(lock) < 0) {
2179 error("could not write config file %s: %s", config_filename,
2180 strerror(errno));
2181 ret = CONFIG_NO_WRITE;
2182 lock = NULL;
2183 goto out_free;
2184 }
2185
2186 /*
2187 * lock is committed, so don't try to roll it back below.
2188 * NOTE: Since lockfile.c keeps a linked list of all created
2189 * lock_file structures, it isn't safe to free(lock). It's
2190 * better to just leave it hanging around.
2191 */
2192 lock = NULL;
2193 ret = 0;
2194
2195 /* Invalidate the config cache */
2196 git_config_clear();
2197
2198 out_free:
2199 if (lock)
2200 rollback_lock_file(lock);
2201 free(filename_buf);
2202 if (contents)
2203 munmap(contents, contents_sz);
2204 if (in_fd >= 0)
2205 close(in_fd);
2206 return ret;
2207
2208 write_err_out:
2209 ret = write_error(get_lock_file_path(lock));
2210 goto out_free;
2211
2212 }
2213
2214 void git_config_set_multivar_in_file(const char *config_filename,
2215 const char *key, const char *value,
2216 const char *value_regex, int multi_replace)
2217 {
2218 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2219 value_regex, multi_replace))
2220 return;
2221 if (value)
2222 die(_("could not set '%s' to '%s'"), key, value);
2223 else
2224 die(_("could not unset '%s'"), key);
2225 }
2226
2227 int git_config_set_multivar_gently(const char *key, const char *value,
2228 const char *value_regex, int multi_replace)
2229 {
2230 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2231 multi_replace);
2232 }
2233
2234 void git_config_set_multivar(const char *key, const char *value,
2235 const char *value_regex, int multi_replace)
2236 {
2237 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2238 multi_replace);
2239 }
2240
2241 static int section_name_match (const char *buf, const char *name)
2242 {
2243 int i = 0, j = 0, dot = 0;
2244 if (buf[i] != '[')
2245 return 0;
2246 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2247 if (!dot && isspace(buf[i])) {
2248 dot = 1;
2249 if (name[j++] != '.')
2250 break;
2251 for (i++; isspace(buf[i]); i++)
2252 ; /* do nothing */
2253 if (buf[i] != '"')
2254 break;
2255 continue;
2256 }
2257 if (buf[i] == '\\' && dot)
2258 i++;
2259 else if (buf[i] == '"' && dot) {
2260 for (i++; isspace(buf[i]); i++)
2261 ; /* do_nothing */
2262 break;
2263 }
2264 if (buf[i] != name[j++])
2265 break;
2266 }
2267 if (buf[i] == ']' && name[j] == 0) {
2268 /*
2269 * We match, now just find the right length offset by
2270 * gobbling up any whitespace after it, as well
2271 */
2272 i++;
2273 for (; buf[i] && isspace(buf[i]); i++)
2274 ; /* do nothing */
2275 return i;
2276 }
2277 return 0;
2278 }
2279
2280 static int section_name_is_ok(const char *name)
2281 {
2282 /* Empty section names are bogus. */
2283 if (!*name)
2284 return 0;
2285
2286 /*
2287 * Before a dot, we must be alphanumeric or dash. After the first dot,
2288 * anything goes, so we can stop checking.
2289 */
2290 for (; *name && *name != '.'; name++)
2291 if (*name != '-' && !isalnum(*name))
2292 return 0;
2293 return 1;
2294 }
2295
2296 /* if new_name == NULL, the section is removed instead */
2297 int git_config_rename_section_in_file(const char *config_filename,
2298 const char *old_name, const char *new_name)
2299 {
2300 int ret = 0, remove = 0;
2301 char *filename_buf = NULL;
2302 struct lock_file *lock;
2303 int out_fd;
2304 char buf[1024];
2305 FILE *config_file;
2306 struct stat st;
2307
2308 if (new_name && !section_name_is_ok(new_name)) {
2309 ret = error("invalid section name: %s", new_name);
2310 goto out;
2311 }
2312
2313 if (!config_filename)
2314 config_filename = filename_buf = git_pathdup("config");
2315
2316 lock = xcalloc(1, sizeof(struct lock_file));
2317 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2318 if (out_fd < 0) {
2319 ret = error("could not lock config file %s", config_filename);
2320 goto out;
2321 }
2322
2323 if (!(config_file = fopen(config_filename, "rb"))) {
2324 /* no config file means nothing to rename, no error */
2325 goto unlock_and_out;
2326 }
2327
2328 fstat(fileno(config_file), &st);
2329
2330 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2331 ret = error("chmod on %s failed: %s",
2332 get_lock_file_path(lock), strerror(errno));
2333 goto out;
2334 }
2335
2336 while (fgets(buf, sizeof(buf), config_file)) {
2337 int i;
2338 int length;
2339 char *output = buf;
2340 for (i = 0; buf[i] && isspace(buf[i]); i++)
2341 ; /* do nothing */
2342 if (buf[i] == '[') {
2343 /* it's a section */
2344 int offset = section_name_match(&buf[i], old_name);
2345 if (offset > 0) {
2346 ret++;
2347 if (new_name == NULL) {
2348 remove = 1;
2349 continue;
2350 }
2351 store.baselen = strlen(new_name);
2352 if (!store_write_section(out_fd, new_name)) {
2353 ret = write_error(get_lock_file_path(lock));
2354 goto out;
2355 }
2356 /*
2357 * We wrote out the new section, with
2358 * a newline, now skip the old
2359 * section's length
2360 */
2361 output += offset + i;
2362 if (strlen(output) > 0) {
2363 /*
2364 * More content means there's
2365 * a declaration to put on the
2366 * next line; indent with a
2367 * tab
2368 */
2369 output -= 1;
2370 output[0] = '\t';
2371 }
2372 }
2373 remove = 0;
2374 }
2375 if (remove)
2376 continue;
2377 length = strlen(output);
2378 if (write_in_full(out_fd, output, length) != length) {
2379 ret = write_error(get_lock_file_path(lock));
2380 goto out;
2381 }
2382 }
2383 fclose(config_file);
2384 unlock_and_out:
2385 if (commit_lock_file(lock) < 0)
2386 ret = error("could not write config file %s: %s",
2387 config_filename, strerror(errno));
2388 out:
2389 free(filename_buf);
2390 return ret;
2391 }
2392
2393 int git_config_rename_section(const char *old_name, const char *new_name)
2394 {
2395 return git_config_rename_section_in_file(NULL, old_name, new_name);
2396 }
2397
2398 /*
2399 * Call this to report error for your variable that should not
2400 * get a boolean value (i.e. "[my] var" means "true").
2401 */
2402 #undef config_error_nonbool
2403 int config_error_nonbool(const char *var)
2404 {
2405 return error("missing value for '%s'", var);
2406 }
2407
2408 int parse_config_key(const char *var,
2409 const char *section,
2410 const char **subsection, int *subsection_len,
2411 const char **key)
2412 {
2413 int section_len = strlen(section);
2414 const char *dot;
2415
2416 /* Does it start with "section." ? */
2417 if (!starts_with(var, section) || var[section_len] != '.')
2418 return -1;
2419
2420 /*
2421 * Find the key; we don't know yet if we have a subsection, but we must
2422 * parse backwards from the end, since the subsection may have dots in
2423 * it, too.
2424 */
2425 dot = strrchr(var, '.');
2426 *key = dot + 1;
2427
2428 /* Did we have a subsection at all? */
2429 if (dot == var + section_len) {
2430 *subsection = NULL;
2431 *subsection_len = 0;
2432 }
2433 else {
2434 *subsection = var + section_len + 1;
2435 *subsection_len = dot - *subsection;
2436 }
2437
2438 return 0;
2439 }
2440
2441 const char *current_config_origin_type(void)
2442 {
2443 return cf && cf->origin_type ? cf->origin_type : "command line";
2444 }
2445
2446 const char *current_config_name(void)
2447 {
2448 return cf && cf->name ? cf->name : "";
2449 }
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