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Merge branch 'jk/parse-config-key-cleanup' into maint
[git/gitweb.git] / config.c
blob0e9e1ebefc0a6771de7bf20615e41176ed986179
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 enum config_origin_type 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 /*
42 * These variables record the "current" config source, which
43 * can be accessed by parsing callbacks.
44 *
45 * The "cf" variable will be non-NULL only when we are actually parsing a real
46 * config source (file, blob, cmdline, etc).
47 *
48 * The "current_config_kvi" variable will be non-NULL only when we are feeding
49 * cached config from a configset into a callback.
50 *
51 * They should generally never be non-NULL at the same time. If they are both
52 * NULL, then we aren't parsing anything (and depending on the function looking
53 * at the variables, it's either a bug for it to be called in the first place,
54 * or it's a function which can be reused for non-config purposes, and should
55 * fall back to some sane behavior).
56 */
57 static struct config_source *cf;
58 static struct key_value_info *current_config_kvi;
59
60 /*
61 * Similar to the variables above, this gives access to the "scope" of the
62 * current value (repo, global, etc). For cached values, it can be found via
63 * the current_config_kvi as above. During parsing, the current value can be
64 * found in this variable. It's not part of "cf" because it transcends a single
65 * file (i.e., a file included from .git/config is still in "repo" scope).
66 */
67 static enum config_scope current_parsing_scope;
68
69 static int core_compression_seen;
70 static int pack_compression_seen;
71 static int zlib_compression_seen;
72
73 /*
74 * Default config_set that contains key-value pairs from the usual set of config
75 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
76 * config file and the global /etc/gitconfig)
77 */
78 static struct config_set the_config_set;
79
80 static int config_file_fgetc(struct config_source *conf)
81 {
82 return getc_unlocked(conf->u.file);
83 }
84
85 static int config_file_ungetc(int c, struct config_source *conf)
86 {
87 return ungetc(c, conf->u.file);
88 }
89
90 static long config_file_ftell(struct config_source *conf)
91 {
92 return ftell(conf->u.file);
93 }
94
95
96 static int config_buf_fgetc(struct config_source *conf)
97 {
98 if (conf->u.buf.pos < conf->u.buf.len)
99 return conf->u.buf.buf[conf->u.buf.pos++];
100
101 return EOF;
102 }
103
104 static int config_buf_ungetc(int c, struct config_source *conf)
105 {
106 if (conf->u.buf.pos > 0) {
107 conf->u.buf.pos--;
108 if (conf->u.buf.buf[conf->u.buf.pos] != c)
109 die("BUG: config_buf can only ungetc the same character");
110 return c;
111 }
112
113 return EOF;
114 }
115
116 static long config_buf_ftell(struct config_source *conf)
117 {
118 return conf->u.buf.pos;
119 }
120
121 #define MAX_INCLUDE_DEPTH 10
122 static const char include_depth_advice[] =
123 "exceeded maximum include depth (%d) while including\n"
124 " %s\n"
125 "from\n"
126 " %s\n"
127 "Do you have circular includes?";
128 static int handle_path_include(const char *path, struct config_include_data *inc)
129 {
130 int ret = 0;
131 struct strbuf buf = STRBUF_INIT;
132 char *expanded;
133
134 if (!path)
135 return config_error_nonbool("include.path");
136
137 expanded = expand_user_path(path);
138 if (!expanded)
139 return error("could not expand include path '%s'", path);
140 path = expanded;
141
142 /*
143 * Use an absolute path as-is, but interpret relative paths
144 * based on the including config file.
145 */
146 if (!is_absolute_path(path)) {
147 char *slash;
148
149 if (!cf || !cf->path)
150 return error("relative config includes must come from files");
151
152 slash = find_last_dir_sep(cf->path);
153 if (slash)
154 strbuf_add(&buf, cf->path, slash - cf->path + 1);
155 strbuf_addstr(&buf, path);
156 path = buf.buf;
157 }
158
159 if (!access_or_die(path, R_OK, 0)) {
160 if (++inc->depth > MAX_INCLUDE_DEPTH)
161 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
162 !cf ? "<unknown>" :
163 cf->name ? cf->name :
164 "the command line");
165 ret = git_config_from_file(git_config_include, path, inc);
166 inc->depth--;
167 }
168 strbuf_release(&buf);
169 free(expanded);
170 return ret;
171 }
172
173 int git_config_include(const char *var, const char *value, void *data)
174 {
175 struct config_include_data *inc = data;
176 int ret;
177
178 /*
179 * Pass along all values, including "include" directives; this makes it
180 * possible to query information on the includes themselves.
181 */
182 ret = inc->fn(var, value, inc->data);
183 if (ret < 0)
184 return ret;
185
186 if (!strcmp(var, "include.path"))
187 ret = handle_path_include(value, inc);
188 return ret;
189 }
190
191 void git_config_push_parameter(const char *text)
192 {
193 struct strbuf env = STRBUF_INIT;
194 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
195 if (old && *old) {
196 strbuf_addstr(&env, old);
197 strbuf_addch(&env, ' ');
198 }
199 sq_quote_buf(&env, text);
200 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
201 strbuf_release(&env);
202 }
203
204 static inline int iskeychar(int c)
205 {
206 return isalnum(c) || c == '-';
207 }
208
209 /*
210 * Auxiliary function to sanity-check and split the key into the section
211 * identifier and variable name.
212 *
213 * Returns 0 on success, -1 when there is an invalid character in the key and
214 * -2 if there is no section name in the key.
215 *
216 * store_key - pointer to char* which will hold a copy of the key with
217 * lowercase section and variable name
218 * baselen - pointer to int which will hold the length of the
219 * section + subsection part, can be NULL
220 */
221 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
222 {
223 int i, dot, baselen;
224 const char *last_dot = strrchr(key, '.');
225
226 /*
227 * Since "key" actually contains the section name and the real
228 * key name separated by a dot, we have to know where the dot is.
229 */
230
231 if (last_dot == NULL || last_dot == key) {
232 if (!quiet)
233 error("key does not contain a section: %s", key);
234 return -CONFIG_NO_SECTION_OR_NAME;
235 }
236
237 if (!last_dot[1]) {
238 if (!quiet)
239 error("key does not contain variable name: %s", key);
240 return -CONFIG_NO_SECTION_OR_NAME;
241 }
242
243 baselen = last_dot - key;
244 if (baselen_)
245 *baselen_ = baselen;
246
247 /*
248 * Validate the key and while at it, lower case it for matching.
249 */
250 if (store_key)
251 *store_key = xmallocz(strlen(key));
252
253 dot = 0;
254 for (i = 0; key[i]; i++) {
255 unsigned char c = key[i];
256 if (c == '.')
257 dot = 1;
258 /* Leave the extended basename untouched.. */
259 if (!dot || i > baselen) {
260 if (!iskeychar(c) ||
261 (i == baselen + 1 && !isalpha(c))) {
262 if (!quiet)
263 error("invalid key: %s", key);
264 goto out_free_ret_1;
265 }
266 c = tolower(c);
267 } else if (c == '\n') {
268 if (!quiet)
269 error("invalid key (newline): %s", key);
270 goto out_free_ret_1;
271 }
272 if (store_key)
273 (*store_key)[i] = c;
274 }
275
276 return 0;
277
278 out_free_ret_1:
279 if (store_key) {
280 free(*store_key);
281 *store_key = NULL;
282 }
283 return -CONFIG_INVALID_KEY;
284 }
285
286 int git_config_parse_key(const char *key, char **store_key, int *baselen)
287 {
288 return git_config_parse_key_1(key, store_key, baselen, 0);
289 }
290
291 int git_config_key_is_valid(const char *key)
292 {
293 return !git_config_parse_key_1(key, NULL, NULL, 1);
294 }
295
296 int git_config_parse_parameter(const char *text,
297 config_fn_t fn, void *data)
298 {
299 const char *value;
300 char *canonical_name;
301 struct strbuf **pair;
302 int ret;
303
304 pair = strbuf_split_str(text, '=', 2);
305 if (!pair[0])
306 return error("bogus config parameter: %s", text);
307
308 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
309 strbuf_setlen(pair[0], pair[0]->len - 1);
310 value = pair[1] ? pair[1]->buf : "";
311 } else {
312 value = NULL;
313 }
314
315 strbuf_trim(pair[0]);
316 if (!pair[0]->len) {
317 strbuf_list_free(pair);
318 return error("bogus config parameter: %s", text);
319 }
320
321 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
322 ret = -1;
323 } else {
324 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
325 free(canonical_name);
326 }
327 strbuf_list_free(pair);
328 return ret;
329 }
330
331 int git_config_from_parameters(config_fn_t fn, void *data)
332 {
333 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
334 int ret = 0;
335 char *envw;
336 const char **argv = NULL;
337 int nr = 0, alloc = 0;
338 int i;
339 struct config_source source;
340
341 if (!env)
342 return 0;
343
344 memset(&source, 0, sizeof(source));
345 source.prev = cf;
346 source.origin_type = CONFIG_ORIGIN_CMDLINE;
347 cf = &source;
348
349 /* sq_dequote will write over it */
350 envw = xstrdup(env);
351
352 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
353 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
354 goto out;
355 }
356
357 for (i = 0; i < nr; i++) {
358 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
359 ret = -1;
360 goto out;
361 }
362 }
363
364 out:
365 free(argv);
366 free(envw);
367 cf = source.prev;
368 return ret;
369 }
370
371 static int get_next_char(void)
372 {
373 int c = cf->do_fgetc(cf);
374
375 if (c == '\r') {
376 /* DOS like systems */
377 c = cf->do_fgetc(cf);
378 if (c != '\n') {
379 if (c != EOF)
380 cf->do_ungetc(c, cf);
381 c = '\r';
382 }
383 }
384 if (c == '\n')
385 cf->linenr++;
386 if (c == EOF) {
387 cf->eof = 1;
388 cf->linenr++;
389 c = '\n';
390 }
391 return c;
392 }
393
394 static char *parse_value(void)
395 {
396 int quote = 0, comment = 0, space = 0;
397
398 strbuf_reset(&cf->value);
399 for (;;) {
400 int c = get_next_char();
401 if (c == '\n') {
402 if (quote) {
403 cf->linenr--;
404 return NULL;
405 }
406 return cf->value.buf;
407 }
408 if (comment)
409 continue;
410 if (isspace(c) && !quote) {
411 if (cf->value.len)
412 space++;
413 continue;
414 }
415 if (!quote) {
416 if (c == ';' || c == '#') {
417 comment = 1;
418 continue;
419 }
420 }
421 for (; space; space--)
422 strbuf_addch(&cf->value, ' ');
423 if (c == '\\') {
424 c = get_next_char();
425 switch (c) {
426 case '\n':
427 continue;
428 case 't':
429 c = '\t';
430 break;
431 case 'b':
432 c = '\b';
433 break;
434 case 'n':
435 c = '\n';
436 break;
437 /* Some characters escape as themselves */
438 case '\\': case '"':
439 break;
440 /* Reject unknown escape sequences */
441 default:
442 return NULL;
443 }
444 strbuf_addch(&cf->value, c);
445 continue;
446 }
447 if (c == '"') {
448 quote = 1-quote;
449 continue;
450 }
451 strbuf_addch(&cf->value, c);
452 }
453 }
454
455 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
456 {
457 int c;
458 char *value;
459 int ret;
460
461 /* Get the full name */
462 for (;;) {
463 c = get_next_char();
464 if (cf->eof)
465 break;
466 if (!iskeychar(c))
467 break;
468 strbuf_addch(name, tolower(c));
469 }
470
471 while (c == ' ' || c == '\t')
472 c = get_next_char();
473
474 value = NULL;
475 if (c != '\n') {
476 if (c != '=')
477 return -1;
478 value = parse_value();
479 if (!value)
480 return -1;
481 }
482 /*
483 * We already consumed the \n, but we need linenr to point to
484 * the line we just parsed during the call to fn to get
485 * accurate line number in error messages.
486 */
487 cf->linenr--;
488 ret = fn(name->buf, value, data);
489 cf->linenr++;
490 return ret;
491 }
492
493 static int get_extended_base_var(struct strbuf *name, int c)
494 {
495 do {
496 if (c == '\n')
497 goto error_incomplete_line;
498 c = get_next_char();
499 } while (isspace(c));
500
501 /* We require the format to be '[base "extension"]' */
502 if (c != '"')
503 return -1;
504 strbuf_addch(name, '.');
505
506 for (;;) {
507 int c = get_next_char();
508 if (c == '\n')
509 goto error_incomplete_line;
510 if (c == '"')
511 break;
512 if (c == '\\') {
513 c = get_next_char();
514 if (c == '\n')
515 goto error_incomplete_line;
516 }
517 strbuf_addch(name, c);
518 }
519
520 /* Final ']' */
521 if (get_next_char() != ']')
522 return -1;
523 return 0;
524 error_incomplete_line:
525 cf->linenr--;
526 return -1;
527 }
528
529 static int get_base_var(struct strbuf *name)
530 {
531 for (;;) {
532 int c = get_next_char();
533 if (cf->eof)
534 return -1;
535 if (c == ']')
536 return 0;
537 if (isspace(c))
538 return get_extended_base_var(name, c);
539 if (!iskeychar(c) && c != '.')
540 return -1;
541 strbuf_addch(name, tolower(c));
542 }
543 }
544
545 static int git_parse_source(config_fn_t fn, void *data)
546 {
547 int comment = 0;
548 int baselen = 0;
549 struct strbuf *var = &cf->var;
550 int error_return = 0;
551 char *error_msg = NULL;
552
553 /* U+FEFF Byte Order Mark in UTF8 */
554 const char *bomptr = utf8_bom;
555
556 for (;;) {
557 int c = get_next_char();
558 if (bomptr && *bomptr) {
559 /* We are at the file beginning; skip UTF8-encoded BOM
560 * if present. Sane editors won't put this in on their
561 * own, but e.g. Windows Notepad will do it happily. */
562 if (c == (*bomptr & 0377)) {
563 bomptr++;
564 continue;
565 } else {
566 /* Do not tolerate partial BOM. */
567 if (bomptr != utf8_bom)
568 break;
569 /* No BOM at file beginning. Cool. */
570 bomptr = NULL;
571 }
572 }
573 if (c == '\n') {
574 if (cf->eof)
575 return 0;
576 comment = 0;
577 continue;
578 }
579 if (comment || isspace(c))
580 continue;
581 if (c == '#' || c == ';') {
582 comment = 1;
583 continue;
584 }
585 if (c == '[') {
586 /* Reset prior to determining a new stem */
587 strbuf_reset(var);
588 if (get_base_var(var) < 0 || var->len < 1)
589 break;
590 strbuf_addch(var, '.');
591 baselen = var->len;
592 continue;
593 }
594 if (!isalpha(c))
595 break;
596 /*
597 * Truncate the var name back to the section header
598 * stem prior to grabbing the suffix part of the name
599 * and the value.
600 */
601 strbuf_setlen(var, baselen);
602 strbuf_addch(var, tolower(c));
603 if (get_value(fn, data, var) < 0)
604 break;
605 }
606
607 switch (cf->origin_type) {
608 case CONFIG_ORIGIN_BLOB:
609 error_msg = xstrfmt(_("bad config line %d in blob %s"),
610 cf->linenr, cf->name);
611 break;
612 case CONFIG_ORIGIN_FILE:
613 error_msg = xstrfmt(_("bad config line %d in file %s"),
614 cf->linenr, cf->name);
615 break;
616 case CONFIG_ORIGIN_STDIN:
617 error_msg = xstrfmt(_("bad config line %d in standard input"),
618 cf->linenr);
619 break;
620 case CONFIG_ORIGIN_SUBMODULE_BLOB:
621 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
622 cf->linenr, cf->name);
623 break;
624 case CONFIG_ORIGIN_CMDLINE:
625 error_msg = xstrfmt(_("bad config line %d in command line %s"),
626 cf->linenr, cf->name);
627 break;
628 default:
629 error_msg = xstrfmt(_("bad config line %d in %s"),
630 cf->linenr, cf->name);
631 }
632
633 if (cf->die_on_error)
634 die("%s", error_msg);
635 else
636 error_return = error("%s", error_msg);
637
638 free(error_msg);
639 return error_return;
640 }
641
642 static int parse_unit_factor(const char *end, uintmax_t *val)
643 {
644 if (!*end)
645 return 1;
646 else if (!strcasecmp(end, "k")) {
647 *val *= 1024;
648 return 1;
649 }
650 else if (!strcasecmp(end, "m")) {
651 *val *= 1024 * 1024;
652 return 1;
653 }
654 else if (!strcasecmp(end, "g")) {
655 *val *= 1024 * 1024 * 1024;
656 return 1;
657 }
658 return 0;
659 }
660
661 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
662 {
663 if (value && *value) {
664 char *end;
665 intmax_t val;
666 uintmax_t uval;
667 uintmax_t factor = 1;
668
669 errno = 0;
670 val = strtoimax(value, &end, 0);
671 if (errno == ERANGE)
672 return 0;
673 if (!parse_unit_factor(end, &factor)) {
674 errno = EINVAL;
675 return 0;
676 }
677 uval = labs(val);
678 uval *= factor;
679 if (uval > max || labs(val) > uval) {
680 errno = ERANGE;
681 return 0;
682 }
683 val *= factor;
684 *ret = val;
685 return 1;
686 }
687 errno = EINVAL;
688 return 0;
689 }
690
691 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
692 {
693 if (value && *value) {
694 char *end;
695 uintmax_t val;
696 uintmax_t oldval;
697
698 errno = 0;
699 val = strtoumax(value, &end, 0);
700 if (errno == ERANGE)
701 return 0;
702 oldval = val;
703 if (!parse_unit_factor(end, &val)) {
704 errno = EINVAL;
705 return 0;
706 }
707 if (val > max || oldval > val) {
708 errno = ERANGE;
709 return 0;
710 }
711 *ret = val;
712 return 1;
713 }
714 errno = EINVAL;
715 return 0;
716 }
717
718 static int git_parse_int(const char *value, int *ret)
719 {
720 intmax_t tmp;
721 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
722 return 0;
723 *ret = tmp;
724 return 1;
725 }
726
727 static int git_parse_int64(const char *value, int64_t *ret)
728 {
729 intmax_t tmp;
730 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
731 return 0;
732 *ret = tmp;
733 return 1;
734 }
735
736 int git_parse_ulong(const char *value, unsigned long *ret)
737 {
738 uintmax_t tmp;
739 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
740 return 0;
741 *ret = tmp;
742 return 1;
743 }
744
745 NORETURN
746 static void die_bad_number(const char *name, const char *value)
747 {
748 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
749
750 if (!value)
751 value = "";
752
753 if (!(cf && cf->name))
754 die(_("bad numeric config value '%s' for '%s': %s"),
755 value, name, error_type);
756
757 switch (cf->origin_type) {
758 case CONFIG_ORIGIN_BLOB:
759 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
760 value, name, cf->name, error_type);
761 case CONFIG_ORIGIN_FILE:
762 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
763 value, name, cf->name, error_type);
764 case CONFIG_ORIGIN_STDIN:
765 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
766 value, name, error_type);
767 case CONFIG_ORIGIN_SUBMODULE_BLOB:
768 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
769 value, name, cf->name, error_type);
770 case CONFIG_ORIGIN_CMDLINE:
771 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
772 value, name, cf->name, error_type);
773 default:
774 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
775 value, name, cf->name, error_type);
776 }
777 }
778
779 int git_config_int(const char *name, const char *value)
780 {
781 int ret;
782 if (!git_parse_int(value, &ret))
783 die_bad_number(name, value);
784 return ret;
785 }
786
787 int64_t git_config_int64(const char *name, const char *value)
788 {
789 int64_t ret;
790 if (!git_parse_int64(value, &ret))
791 die_bad_number(name, value);
792 return ret;
793 }
794
795 unsigned long git_config_ulong(const char *name, const char *value)
796 {
797 unsigned long ret;
798 if (!git_parse_ulong(value, &ret))
799 die_bad_number(name, value);
800 return ret;
801 }
802
803 int git_parse_maybe_bool(const char *value)
804 {
805 if (!value)
806 return 1;
807 if (!*value)
808 return 0;
809 if (!strcasecmp(value, "true")
810 || !strcasecmp(value, "yes")
811 || !strcasecmp(value, "on"))
812 return 1;
813 if (!strcasecmp(value, "false")
814 || !strcasecmp(value, "no")
815 || !strcasecmp(value, "off"))
816 return 0;
817 return -1;
818 }
819
820 int git_config_maybe_bool(const char *name, const char *value)
821 {
822 int v = git_parse_maybe_bool(value);
823 if (0 <= v)
824 return v;
825 if (git_parse_int(value, &v))
826 return !!v;
827 return -1;
828 }
829
830 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
831 {
832 int v = git_parse_maybe_bool(value);
833 if (0 <= v) {
834 *is_bool = 1;
835 return v;
836 }
837 *is_bool = 0;
838 return git_config_int(name, value);
839 }
840
841 int git_config_bool(const char *name, const char *value)
842 {
843 int discard;
844 return !!git_config_bool_or_int(name, value, &discard);
845 }
846
847 int git_config_string(const char **dest, const char *var, const char *value)
848 {
849 if (!value)
850 return config_error_nonbool(var);
851 *dest = xstrdup(value);
852 return 0;
853 }
854
855 int git_config_pathname(const char **dest, const char *var, const char *value)
856 {
857 if (!value)
858 return config_error_nonbool(var);
859 *dest = expand_user_path(value);
860 if (!*dest)
861 die(_("failed to expand user dir in: '%s'"), value);
862 return 0;
863 }
864
865 static int git_default_core_config(const char *var, const char *value)
866 {
867 /* This needs a better name */
868 if (!strcmp(var, "core.filemode")) {
869 trust_executable_bit = git_config_bool(var, value);
870 return 0;
871 }
872 if (!strcmp(var, "core.trustctime")) {
873 trust_ctime = git_config_bool(var, value);
874 return 0;
875 }
876 if (!strcmp(var, "core.checkstat")) {
877 if (!strcasecmp(value, "default"))
878 check_stat = 1;
879 else if (!strcasecmp(value, "minimal"))
880 check_stat = 0;
881 }
882
883 if (!strcmp(var, "core.quotepath")) {
884 quote_path_fully = git_config_bool(var, value);
885 return 0;
886 }
887
888 if (!strcmp(var, "core.symlinks")) {
889 has_symlinks = git_config_bool(var, value);
890 return 0;
891 }
892
893 if (!strcmp(var, "core.ignorecase")) {
894 ignore_case = git_config_bool(var, value);
895 return 0;
896 }
897
898 if (!strcmp(var, "core.attributesfile"))
899 return git_config_pathname(&git_attributes_file, var, value);
900
901 if (!strcmp(var, "core.hookspath"))
902 return git_config_pathname(&git_hooks_path, var, value);
903
904 if (!strcmp(var, "core.bare")) {
905 is_bare_repository_cfg = git_config_bool(var, value);
906 return 0;
907 }
908
909 if (!strcmp(var, "core.ignorestat")) {
910 assume_unchanged = git_config_bool(var, value);
911 return 0;
912 }
913
914 if (!strcmp(var, "core.prefersymlinkrefs")) {
915 prefer_symlink_refs = git_config_bool(var, value);
916 return 0;
917 }
918
919 if (!strcmp(var, "core.logallrefupdates")) {
920 if (value && !strcasecmp(value, "always"))
921 log_all_ref_updates = LOG_REFS_ALWAYS;
922 else if (git_config_bool(var, value))
923 log_all_ref_updates = LOG_REFS_NORMAL;
924 else
925 log_all_ref_updates = LOG_REFS_NONE;
926 return 0;
927 }
928
929 if (!strcmp(var, "core.warnambiguousrefs")) {
930 warn_ambiguous_refs = git_config_bool(var, value);
931 return 0;
932 }
933
934 if (!strcmp(var, "core.abbrev")) {
935 if (!value)
936 return config_error_nonbool(var);
937 if (!strcasecmp(value, "auto"))
938 default_abbrev = -1;
939 else {
940 int abbrev = git_config_int(var, value);
941 if (abbrev < minimum_abbrev || abbrev > 40)
942 return error("abbrev length out of range: %d", abbrev);
943 default_abbrev = abbrev;
944 }
945 return 0;
946 }
947
948 if (!strcmp(var, "core.disambiguate"))
949 return set_disambiguate_hint_config(var, value);
950
951 if (!strcmp(var, "core.loosecompression")) {
952 int level = git_config_int(var, value);
953 if (level == -1)
954 level = Z_DEFAULT_COMPRESSION;
955 else if (level < 0 || level > Z_BEST_COMPRESSION)
956 die(_("bad zlib compression level %d"), level);
957 zlib_compression_level = level;
958 zlib_compression_seen = 1;
959 return 0;
960 }
961
962 if (!strcmp(var, "core.compression")) {
963 int level = git_config_int(var, value);
964 if (level == -1)
965 level = Z_DEFAULT_COMPRESSION;
966 else if (level < 0 || level > Z_BEST_COMPRESSION)
967 die(_("bad zlib compression level %d"), level);
968 core_compression_level = level;
969 core_compression_seen = 1;
970 if (!zlib_compression_seen)
971 zlib_compression_level = level;
972 if (!pack_compression_seen)
973 pack_compression_level = level;
974 return 0;
975 }
976
977 if (!strcmp(var, "core.packedgitwindowsize")) {
978 int pgsz_x2 = getpagesize() * 2;
979 packed_git_window_size = git_config_ulong(var, value);
980
981 /* This value must be multiple of (pagesize * 2) */
982 packed_git_window_size /= pgsz_x2;
983 if (packed_git_window_size < 1)
984 packed_git_window_size = 1;
985 packed_git_window_size *= pgsz_x2;
986 return 0;
987 }
988
989 if (!strcmp(var, "core.bigfilethreshold")) {
990 big_file_threshold = git_config_ulong(var, value);
991 return 0;
992 }
993
994 if (!strcmp(var, "core.packedgitlimit")) {
995 packed_git_limit = git_config_ulong(var, value);
996 return 0;
997 }
998
999 if (!strcmp(var, "core.deltabasecachelimit")) {
1000 delta_base_cache_limit = git_config_ulong(var, value);
1001 return 0;
1002 }
1003
1004 if (!strcmp(var, "core.autocrlf")) {
1005 if (value && !strcasecmp(value, "input")) {
1006 auto_crlf = AUTO_CRLF_INPUT;
1007 return 0;
1008 }
1009 auto_crlf = git_config_bool(var, value);
1010 return 0;
1011 }
1012
1013 if (!strcmp(var, "core.safecrlf")) {
1014 if (value && !strcasecmp(value, "warn")) {
1015 safe_crlf = SAFE_CRLF_WARN;
1016 return 0;
1017 }
1018 safe_crlf = git_config_bool(var, value);
1019 return 0;
1020 }
1021
1022 if (!strcmp(var, "core.eol")) {
1023 if (value && !strcasecmp(value, "lf"))
1024 core_eol = EOL_LF;
1025 else if (value && !strcasecmp(value, "crlf"))
1026 core_eol = EOL_CRLF;
1027 else if (value && !strcasecmp(value, "native"))
1028 core_eol = EOL_NATIVE;
1029 else
1030 core_eol = EOL_UNSET;
1031 return 0;
1032 }
1033
1034 if (!strcmp(var, "core.notesref")) {
1035 notes_ref_name = xstrdup(value);
1036 return 0;
1037 }
1038
1039 if (!strcmp(var, "core.editor"))
1040 return git_config_string(&editor_program, var, value);
1041
1042 if (!strcmp(var, "core.commentchar")) {
1043 if (!value)
1044 return config_error_nonbool(var);
1045 else if (!strcasecmp(value, "auto"))
1046 auto_comment_line_char = 1;
1047 else if (value[0] && !value[1]) {
1048 comment_line_char = value[0];
1049 auto_comment_line_char = 0;
1050 } else
1051 return error("core.commentChar should only be one character");
1052 return 0;
1053 }
1054
1055 if (!strcmp(var, "core.askpass"))
1056 return git_config_string(&askpass_program, var, value);
1057
1058 if (!strcmp(var, "core.excludesfile"))
1059 return git_config_pathname(&excludes_file, var, value);
1060
1061 if (!strcmp(var, "core.whitespace")) {
1062 if (!value)
1063 return config_error_nonbool(var);
1064 whitespace_rule_cfg = parse_whitespace_rule(value);
1065 return 0;
1066 }
1067
1068 if (!strcmp(var, "core.fsyncobjectfiles")) {
1069 fsync_object_files = git_config_bool(var, value);
1070 return 0;
1071 }
1072
1073 if (!strcmp(var, "core.preloadindex")) {
1074 core_preload_index = git_config_bool(var, value);
1075 return 0;
1076 }
1077
1078 if (!strcmp(var, "core.createobject")) {
1079 if (!strcmp(value, "rename"))
1080 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1081 else if (!strcmp(value, "link"))
1082 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1083 else
1084 die(_("invalid mode for object creation: %s"), value);
1085 return 0;
1086 }
1087
1088 if (!strcmp(var, "core.sparsecheckout")) {
1089 core_apply_sparse_checkout = git_config_bool(var, value);
1090 return 0;
1091 }
1092
1093 if (!strcmp(var, "core.precomposeunicode")) {
1094 precomposed_unicode = git_config_bool(var, value);
1095 return 0;
1096 }
1097
1098 if (!strcmp(var, "core.protecthfs")) {
1099 protect_hfs = git_config_bool(var, value);
1100 return 0;
1101 }
1102
1103 if (!strcmp(var, "core.protectntfs")) {
1104 protect_ntfs = git_config_bool(var, value);
1105 return 0;
1106 }
1107
1108 if (!strcmp(var, "core.hidedotfiles")) {
1109 if (value && !strcasecmp(value, "dotgitonly"))
1110 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1111 else
1112 hide_dotfiles = git_config_bool(var, value);
1113 return 0;
1114 }
1115
1116 /* Add other config variables here and to Documentation/config.txt. */
1117 return 0;
1118 }
1119
1120 static int git_default_i18n_config(const char *var, const char *value)
1121 {
1122 if (!strcmp(var, "i18n.commitencoding"))
1123 return git_config_string(&git_commit_encoding, var, value);
1124
1125 if (!strcmp(var, "i18n.logoutputencoding"))
1126 return git_config_string(&git_log_output_encoding, var, value);
1127
1128 /* Add other config variables here and to Documentation/config.txt. */
1129 return 0;
1130 }
1131
1132 static int git_default_branch_config(const char *var, const char *value)
1133 {
1134 if (!strcmp(var, "branch.autosetupmerge")) {
1135 if (value && !strcasecmp(value, "always")) {
1136 git_branch_track = BRANCH_TRACK_ALWAYS;
1137 return 0;
1138 }
1139 git_branch_track = git_config_bool(var, value);
1140 return 0;
1141 }
1142 if (!strcmp(var, "branch.autosetuprebase")) {
1143 if (!value)
1144 return config_error_nonbool(var);
1145 else if (!strcmp(value, "never"))
1146 autorebase = AUTOREBASE_NEVER;
1147 else if (!strcmp(value, "local"))
1148 autorebase = AUTOREBASE_LOCAL;
1149 else if (!strcmp(value, "remote"))
1150 autorebase = AUTOREBASE_REMOTE;
1151 else if (!strcmp(value, "always"))
1152 autorebase = AUTOREBASE_ALWAYS;
1153 else
1154 return error("malformed value for %s", var);
1155 return 0;
1156 }
1157
1158 /* Add other config variables here and to Documentation/config.txt. */
1159 return 0;
1160 }
1161
1162 static int git_default_push_config(const char *var, const char *value)
1163 {
1164 if (!strcmp(var, "push.default")) {
1165 if (!value)
1166 return config_error_nonbool(var);
1167 else if (!strcmp(value, "nothing"))
1168 push_default = PUSH_DEFAULT_NOTHING;
1169 else if (!strcmp(value, "matching"))
1170 push_default = PUSH_DEFAULT_MATCHING;
1171 else if (!strcmp(value, "simple"))
1172 push_default = PUSH_DEFAULT_SIMPLE;
1173 else if (!strcmp(value, "upstream"))
1174 push_default = PUSH_DEFAULT_UPSTREAM;
1175 else if (!strcmp(value, "tracking")) /* deprecated */
1176 push_default = PUSH_DEFAULT_UPSTREAM;
1177 else if (!strcmp(value, "current"))
1178 push_default = PUSH_DEFAULT_CURRENT;
1179 else {
1180 error("malformed value for %s: %s", var, value);
1181 return error("Must be one of nothing, matching, simple, "
1182 "upstream or current.");
1183 }
1184 return 0;
1185 }
1186
1187 /* Add other config variables here and to Documentation/config.txt. */
1188 return 0;
1189 }
1190
1191 static int git_default_mailmap_config(const char *var, const char *value)
1192 {
1193 if (!strcmp(var, "mailmap.file"))
1194 return git_config_pathname(&git_mailmap_file, var, value);
1195 if (!strcmp(var, "mailmap.blob"))
1196 return git_config_string(&git_mailmap_blob, var, value);
1197
1198 /* Add other config variables here and to Documentation/config.txt. */
1199 return 0;
1200 }
1201
1202 int git_default_config(const char *var, const char *value, void *dummy)
1203 {
1204 if (starts_with(var, "core."))
1205 return git_default_core_config(var, value);
1206
1207 if (starts_with(var, "user."))
1208 return git_ident_config(var, value, dummy);
1209
1210 if (starts_with(var, "i18n."))
1211 return git_default_i18n_config(var, value);
1212
1213 if (starts_with(var, "branch."))
1214 return git_default_branch_config(var, value);
1215
1216 if (starts_with(var, "push."))
1217 return git_default_push_config(var, value);
1218
1219 if (starts_with(var, "mailmap."))
1220 return git_default_mailmap_config(var, value);
1221
1222 if (starts_with(var, "advice."))
1223 return git_default_advice_config(var, value);
1224
1225 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1226 pager_use_color = git_config_bool(var,value);
1227 return 0;
1228 }
1229
1230 if (!strcmp(var, "pack.packsizelimit")) {
1231 pack_size_limit_cfg = git_config_ulong(var, value);
1232 return 0;
1233 }
1234
1235 if (!strcmp(var, "pack.compression")) {
1236 int level = git_config_int(var, value);
1237 if (level == -1)
1238 level = Z_DEFAULT_COMPRESSION;
1239 else if (level < 0 || level > Z_BEST_COMPRESSION)
1240 die(_("bad pack compression level %d"), level);
1241 pack_compression_level = level;
1242 pack_compression_seen = 1;
1243 return 0;
1244 }
1245
1246 /* Add other config variables here and to Documentation/config.txt. */
1247 return 0;
1248 }
1249
1250 /*
1251 * All source specific fields in the union, die_on_error, name and the callbacks
1252 * fgetc, ungetc, ftell of top need to be initialized before calling
1253 * this function.
1254 */
1255 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1256 {
1257 int ret;
1258
1259 /* push config-file parsing state stack */
1260 top->prev = cf;
1261 top->linenr = 1;
1262 top->eof = 0;
1263 strbuf_init(&top->value, 1024);
1264 strbuf_init(&top->var, 1024);
1265 cf = top;
1266
1267 ret = git_parse_source(fn, data);
1268
1269 /* pop config-file parsing state stack */
1270 strbuf_release(&top->value);
1271 strbuf_release(&top->var);
1272 cf = top->prev;
1273
1274 return ret;
1275 }
1276
1277 static int do_config_from_file(config_fn_t fn,
1278 const enum config_origin_type origin_type,
1279 const char *name, const char *path, FILE *f,
1280 void *data)
1281 {
1282 struct config_source top;
1283
1284 top.u.file = f;
1285 top.origin_type = origin_type;
1286 top.name = name;
1287 top.path = path;
1288 top.die_on_error = 1;
1289 top.do_fgetc = config_file_fgetc;
1290 top.do_ungetc = config_file_ungetc;
1291 top.do_ftell = config_file_ftell;
1292
1293 return do_config_from(&top, fn, data);
1294 }
1295
1296 static int git_config_from_stdin(config_fn_t fn, void *data)
1297 {
1298 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1299 }
1300
1301 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1302 {
1303 int ret = -1;
1304 FILE *f;
1305
1306 f = fopen(filename, "r");
1307 if (f) {
1308 flockfile(f);
1309 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1310 funlockfile(f);
1311 fclose(f);
1312 }
1313 return ret;
1314 }
1315
1316 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1317 const char *name, const char *buf, size_t len, void *data)
1318 {
1319 struct config_source top;
1320
1321 top.u.buf.buf = buf;
1322 top.u.buf.len = len;
1323 top.u.buf.pos = 0;
1324 top.origin_type = origin_type;
1325 top.name = name;
1326 top.path = NULL;
1327 top.die_on_error = 0;
1328 top.do_fgetc = config_buf_fgetc;
1329 top.do_ungetc = config_buf_ungetc;
1330 top.do_ftell = config_buf_ftell;
1331
1332 return do_config_from(&top, fn, data);
1333 }
1334
1335 int git_config_from_blob_sha1(config_fn_t fn,
1336 const char *name,
1337 const unsigned char *sha1,
1338 void *data)
1339 {
1340 enum object_type type;
1341 char *buf;
1342 unsigned long size;
1343 int ret;
1344
1345 buf = read_sha1_file(sha1, &type, &size);
1346 if (!buf)
1347 return error("unable to load config blob object '%s'", name);
1348 if (type != OBJ_BLOB) {
1349 free(buf);
1350 return error("reference '%s' does not point to a blob", name);
1351 }
1352
1353 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1354 free(buf);
1355
1356 return ret;
1357 }
1358
1359 static int git_config_from_blob_ref(config_fn_t fn,
1360 const char *name,
1361 void *data)
1362 {
1363 unsigned char sha1[20];
1364
1365 if (get_sha1(name, sha1) < 0)
1366 return error("unable to resolve config blob '%s'", name);
1367 return git_config_from_blob_sha1(fn, name, sha1, data);
1368 }
1369
1370 const char *git_etc_gitconfig(void)
1371 {
1372 static const char *system_wide;
1373 if (!system_wide)
1374 system_wide = system_path(ETC_GITCONFIG);
1375 return system_wide;
1376 }
1377
1378 /*
1379 * Parse environment variable 'k' as a boolean (in various
1380 * possible spellings); if missing, use the default value 'def'.
1381 */
1382 int git_env_bool(const char *k, int def)
1383 {
1384 const char *v = getenv(k);
1385 return v ? git_config_bool(k, v) : def;
1386 }
1387
1388 /*
1389 * Parse environment variable 'k' as ulong with possibly a unit
1390 * suffix; if missing, use the default value 'val'.
1391 */
1392 unsigned long git_env_ulong(const char *k, unsigned long val)
1393 {
1394 const char *v = getenv(k);
1395 if (v && !git_parse_ulong(v, &val))
1396 die("failed to parse %s", k);
1397 return val;
1398 }
1399
1400 int git_config_system(void)
1401 {
1402 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1403 }
1404
1405 static int do_git_config_sequence(config_fn_t fn, void *data)
1406 {
1407 int ret = 0;
1408 char *xdg_config = xdg_config_home("config");
1409 char *user_config = expand_user_path("~/.gitconfig");
1410 char *repo_config = have_git_dir() ? git_pathdup("config") : NULL;
1411
1412 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1413 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1414 ret += git_config_from_file(fn, git_etc_gitconfig(),
1415 data);
1416
1417 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1418 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1419 ret += git_config_from_file(fn, xdg_config, data);
1420
1421 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1422 ret += git_config_from_file(fn, user_config, data);
1423
1424 current_parsing_scope = CONFIG_SCOPE_REPO;
1425 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1426 ret += git_config_from_file(fn, repo_config, data);
1427
1428 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1429 if (git_config_from_parameters(fn, data) < 0)
1430 die(_("unable to parse command-line config"));
1431
1432 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1433 free(xdg_config);
1434 free(user_config);
1435 free(repo_config);
1436 return ret;
1437 }
1438
1439 int git_config_with_options(config_fn_t fn, void *data,
1440 struct git_config_source *config_source,
1441 int respect_includes)
1442 {
1443 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1444
1445 if (respect_includes) {
1446 inc.fn = fn;
1447 inc.data = data;
1448 fn = git_config_include;
1449 data = &inc;
1450 }
1451
1452 /*
1453 * If we have a specific filename, use it. Otherwise, follow the
1454 * regular lookup sequence.
1455 */
1456 if (config_source && config_source->use_stdin)
1457 return git_config_from_stdin(fn, data);
1458 else if (config_source && config_source->file)
1459 return git_config_from_file(fn, config_source->file, data);
1460 else if (config_source && config_source->blob)
1461 return git_config_from_blob_ref(fn, config_source->blob, data);
1462
1463 return do_git_config_sequence(fn, data);
1464 }
1465
1466 static void git_config_raw(config_fn_t fn, void *data)
1467 {
1468 if (git_config_with_options(fn, data, NULL, 1) < 0)
1469 /*
1470 * git_config_with_options() normally returns only
1471 * zero, as most errors are fatal, and
1472 * non-fatal potential errors are guarded by "if"
1473 * statements that are entered only when no error is
1474 * possible.
1475 *
1476 * If we ever encounter a non-fatal error, it means
1477 * something went really wrong and we should stop
1478 * immediately.
1479 */
1480 die(_("unknown error occurred while reading the configuration files"));
1481 }
1482
1483 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1484 {
1485 int i, value_index;
1486 struct string_list *values;
1487 struct config_set_element *entry;
1488 struct configset_list *list = &cs->list;
1489
1490 for (i = 0; i < list->nr; i++) {
1491 entry = list->items[i].e;
1492 value_index = list->items[i].value_index;
1493 values = &entry->value_list;
1494
1495 current_config_kvi = values->items[value_index].util;
1496
1497 if (fn(entry->key, values->items[value_index].string, data) < 0)
1498 git_die_config_linenr(entry->key,
1499 current_config_kvi->filename,
1500 current_config_kvi->linenr);
1501
1502 current_config_kvi = NULL;
1503 }
1504 }
1505
1506 static void git_config_check_init(void);
1507
1508 void git_config(config_fn_t fn, void *data)
1509 {
1510 git_config_check_init();
1511 configset_iter(&the_config_set, fn, data);
1512 }
1513
1514 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1515 {
1516 struct config_set_element k;
1517 struct config_set_element *found_entry;
1518 char *normalized_key;
1519 /*
1520 * `key` may come from the user, so normalize it before using it
1521 * for querying entries from the hashmap.
1522 */
1523 if (git_config_parse_key(key, &normalized_key, NULL))
1524 return NULL;
1525
1526 hashmap_entry_init(&k, strhash(normalized_key));
1527 k.key = normalized_key;
1528 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1529 free(normalized_key);
1530 return found_entry;
1531 }
1532
1533 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1534 {
1535 struct config_set_element *e;
1536 struct string_list_item *si;
1537 struct configset_list_item *l_item;
1538 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1539
1540 e = configset_find_element(cs, key);
1541 /*
1542 * Since the keys are being fed by git_config*() callback mechanism, they
1543 * are already normalized. So simply add them without any further munging.
1544 */
1545 if (!e) {
1546 e = xmalloc(sizeof(*e));
1547 hashmap_entry_init(e, strhash(key));
1548 e->key = xstrdup(key);
1549 string_list_init(&e->value_list, 1);
1550 hashmap_add(&cs->config_hash, e);
1551 }
1552 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1553
1554 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1555 l_item = &cs->list.items[cs->list.nr++];
1556 l_item->e = e;
1557 l_item->value_index = e->value_list.nr - 1;
1558
1559 if (!cf)
1560 die("BUG: configset_add_value has no source");
1561 if (cf->name) {
1562 kv_info->filename = strintern(cf->name);
1563 kv_info->linenr = cf->linenr;
1564 kv_info->origin_type = cf->origin_type;
1565 } else {
1566 /* for values read from `git_config_from_parameters()` */
1567 kv_info->filename = NULL;
1568 kv_info->linenr = -1;
1569 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1570 }
1571 kv_info->scope = current_parsing_scope;
1572 si->util = kv_info;
1573
1574 return 0;
1575 }
1576
1577 static int config_set_element_cmp(const struct config_set_element *e1,
1578 const struct config_set_element *e2, const void *unused)
1579 {
1580 return strcmp(e1->key, e2->key);
1581 }
1582
1583 void git_configset_init(struct config_set *cs)
1584 {
1585 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1586 cs->hash_initialized = 1;
1587 cs->list.nr = 0;
1588 cs->list.alloc = 0;
1589 cs->list.items = NULL;
1590 }
1591
1592 void git_configset_clear(struct config_set *cs)
1593 {
1594 struct config_set_element *entry;
1595 struct hashmap_iter iter;
1596 if (!cs->hash_initialized)
1597 return;
1598
1599 hashmap_iter_init(&cs->config_hash, &iter);
1600 while ((entry = hashmap_iter_next(&iter))) {
1601 free(entry->key);
1602 string_list_clear(&entry->value_list, 1);
1603 }
1604 hashmap_free(&cs->config_hash, 1);
1605 cs->hash_initialized = 0;
1606 free(cs->list.items);
1607 cs->list.nr = 0;
1608 cs->list.alloc = 0;
1609 cs->list.items = NULL;
1610 }
1611
1612 static int config_set_callback(const char *key, const char *value, void *cb)
1613 {
1614 struct config_set *cs = cb;
1615 configset_add_value(cs, key, value);
1616 return 0;
1617 }
1618
1619 int git_configset_add_file(struct config_set *cs, const char *filename)
1620 {
1621 return git_config_from_file(config_set_callback, filename, cs);
1622 }
1623
1624 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1625 {
1626 const struct string_list *values = NULL;
1627 /*
1628 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1629 * queried key in the files of the configset, the value returned will be the last
1630 * value in the value list for that key.
1631 */
1632 values = git_configset_get_value_multi(cs, key);
1633
1634 if (!values)
1635 return 1;
1636 assert(values->nr > 0);
1637 *value = values->items[values->nr - 1].string;
1638 return 0;
1639 }
1640
1641 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1642 {
1643 struct config_set_element *e = configset_find_element(cs, key);
1644 return e ? &e->value_list : NULL;
1645 }
1646
1647 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1648 {
1649 const char *value;
1650 if (!git_configset_get_value(cs, key, &value))
1651 return git_config_string(dest, key, value);
1652 else
1653 return 1;
1654 }
1655
1656 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1657 {
1658 return git_configset_get_string_const(cs, key, (const char **)dest);
1659 }
1660
1661 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1662 {
1663 const char *value;
1664 if (!git_configset_get_value(cs, key, &value)) {
1665 *dest = git_config_int(key, value);
1666 return 0;
1667 } else
1668 return 1;
1669 }
1670
1671 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1672 {
1673 const char *value;
1674 if (!git_configset_get_value(cs, key, &value)) {
1675 *dest = git_config_ulong(key, value);
1676 return 0;
1677 } else
1678 return 1;
1679 }
1680
1681 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1682 {
1683 const char *value;
1684 if (!git_configset_get_value(cs, key, &value)) {
1685 *dest = git_config_bool(key, value);
1686 return 0;
1687 } else
1688 return 1;
1689 }
1690
1691 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1692 int *is_bool, int *dest)
1693 {
1694 const char *value;
1695 if (!git_configset_get_value(cs, key, &value)) {
1696 *dest = git_config_bool_or_int(key, value, is_bool);
1697 return 0;
1698 } else
1699 return 1;
1700 }
1701
1702 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1703 {
1704 const char *value;
1705 if (!git_configset_get_value(cs, key, &value)) {
1706 *dest = git_config_maybe_bool(key, value);
1707 if (*dest == -1)
1708 return -1;
1709 return 0;
1710 } else
1711 return 1;
1712 }
1713
1714 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1715 {
1716 const char *value;
1717 if (!git_configset_get_value(cs, key, &value))
1718 return git_config_pathname(dest, key, value);
1719 else
1720 return 1;
1721 }
1722
1723 static void git_config_check_init(void)
1724 {
1725 if (the_config_set.hash_initialized)
1726 return;
1727 git_configset_init(&the_config_set);
1728 git_config_raw(config_set_callback, &the_config_set);
1729 }
1730
1731 void git_config_clear(void)
1732 {
1733 if (!the_config_set.hash_initialized)
1734 return;
1735 git_configset_clear(&the_config_set);
1736 }
1737
1738 int git_config_get_value(const char *key, const char **value)
1739 {
1740 git_config_check_init();
1741 return git_configset_get_value(&the_config_set, key, value);
1742 }
1743
1744 const struct string_list *git_config_get_value_multi(const char *key)
1745 {
1746 git_config_check_init();
1747 return git_configset_get_value_multi(&the_config_set, key);
1748 }
1749
1750 int git_config_get_string_const(const char *key, const char **dest)
1751 {
1752 int ret;
1753 git_config_check_init();
1754 ret = git_configset_get_string_const(&the_config_set, key, dest);
1755 if (ret < 0)
1756 git_die_config(key, NULL);
1757 return ret;
1758 }
1759
1760 int git_config_get_string(const char *key, char **dest)
1761 {
1762 git_config_check_init();
1763 return git_config_get_string_const(key, (const char **)dest);
1764 }
1765
1766 int git_config_get_int(const char *key, int *dest)
1767 {
1768 git_config_check_init();
1769 return git_configset_get_int(&the_config_set, key, dest);
1770 }
1771
1772 int git_config_get_ulong(const char *key, unsigned long *dest)
1773 {
1774 git_config_check_init();
1775 return git_configset_get_ulong(&the_config_set, key, dest);
1776 }
1777
1778 int git_config_get_bool(const char *key, int *dest)
1779 {
1780 git_config_check_init();
1781 return git_configset_get_bool(&the_config_set, key, dest);
1782 }
1783
1784 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1785 {
1786 git_config_check_init();
1787 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1788 }
1789
1790 int git_config_get_maybe_bool(const char *key, int *dest)
1791 {
1792 git_config_check_init();
1793 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1794 }
1795
1796 int git_config_get_pathname(const char *key, const char **dest)
1797 {
1798 int ret;
1799 git_config_check_init();
1800 ret = git_configset_get_pathname(&the_config_set, key, dest);
1801 if (ret < 0)
1802 git_die_config(key, NULL);
1803 return ret;
1804 }
1805
1806 int git_config_get_untracked_cache(void)
1807 {
1808 int val = -1;
1809 const char *v;
1810
1811 /* Hack for test programs like test-dump-untracked-cache */
1812 if (ignore_untracked_cache_config)
1813 return -1;
1814
1815 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1816 return val;
1817
1818 if (!git_config_get_value("core.untrackedcache", &v)) {
1819 if (!strcasecmp(v, "keep"))
1820 return -1;
1821
1822 error("unknown core.untrackedCache value '%s'; "
1823 "using 'keep' default value", v);
1824 return -1;
1825 }
1826
1827 return -1; /* default value */
1828 }
1829
1830 NORETURN
1831 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1832 {
1833 if (!filename)
1834 die(_("unable to parse '%s' from command-line config"), key);
1835 else
1836 die(_("bad config variable '%s' in file '%s' at line %d"),
1837 key, filename, linenr);
1838 }
1839
1840 NORETURN __attribute__((format(printf, 2, 3)))
1841 void git_die_config(const char *key, const char *err, ...)
1842 {
1843 const struct string_list *values;
1844 struct key_value_info *kv_info;
1845
1846 if (err) {
1847 va_list params;
1848 va_start(params, err);
1849 vreportf("error: ", err, params);
1850 va_end(params);
1851 }
1852 values = git_config_get_value_multi(key);
1853 kv_info = values->items[values->nr - 1].util;
1854 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1855 }
1856
1857 /*
1858 * Find all the stuff for git_config_set() below.
1859 */
1860
1861 static struct {
1862 int baselen;
1863 char *key;
1864 int do_not_match;
1865 regex_t *value_regex;
1866 int multi_replace;
1867 size_t *offset;
1868 unsigned int offset_alloc;
1869 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1870 int seen;
1871 } store;
1872
1873 static int matches(const char *key, const char *value)
1874 {
1875 if (strcmp(key, store.key))
1876 return 0; /* not ours */
1877 if (!store.value_regex)
1878 return 1; /* always matches */
1879 if (store.value_regex == CONFIG_REGEX_NONE)
1880 return 0; /* never matches */
1881
1882 return store.do_not_match ^
1883 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1884 }
1885
1886 static int store_aux(const char *key, const char *value, void *cb)
1887 {
1888 const char *ep;
1889 size_t section_len;
1890
1891 switch (store.state) {
1892 case KEY_SEEN:
1893 if (matches(key, value)) {
1894 if (store.seen == 1 && store.multi_replace == 0) {
1895 warning(_("%s has multiple values"), key);
1896 }
1897
1898 ALLOC_GROW(store.offset, store.seen + 1,
1899 store.offset_alloc);
1900
1901 store.offset[store.seen] = cf->do_ftell(cf);
1902 store.seen++;
1903 }
1904 break;
1905 case SECTION_SEEN:
1906 /*
1907 * What we are looking for is in store.key (both
1908 * section and var), and its section part is baselen
1909 * long. We found key (again, both section and var).
1910 * We would want to know if this key is in the same
1911 * section as what we are looking for. We already
1912 * know we are in the same section as what should
1913 * hold store.key.
1914 */
1915 ep = strrchr(key, '.');
1916 section_len = ep - key;
1917
1918 if ((section_len != store.baselen) ||
1919 memcmp(key, store.key, section_len+1)) {
1920 store.state = SECTION_END_SEEN;
1921 break;
1922 }
1923
1924 /*
1925 * Do not increment matches: this is no match, but we
1926 * just made sure we are in the desired section.
1927 */
1928 ALLOC_GROW(store.offset, store.seen + 1,
1929 store.offset_alloc);
1930 store.offset[store.seen] = cf->do_ftell(cf);
1931 /* fallthru */
1932 case SECTION_END_SEEN:
1933 case START:
1934 if (matches(key, value)) {
1935 ALLOC_GROW(store.offset, store.seen + 1,
1936 store.offset_alloc);
1937 store.offset[store.seen] = cf->do_ftell(cf);
1938 store.state = KEY_SEEN;
1939 store.seen++;
1940 } else {
1941 if (strrchr(key, '.') - key == store.baselen &&
1942 !strncmp(key, store.key, store.baselen)) {
1943 store.state = SECTION_SEEN;
1944 ALLOC_GROW(store.offset,
1945 store.seen + 1,
1946 store.offset_alloc);
1947 store.offset[store.seen] = cf->do_ftell(cf);
1948 }
1949 }
1950 }
1951 return 0;
1952 }
1953
1954 static int write_error(const char *filename)
1955 {
1956 error("failed to write new configuration file %s", filename);
1957
1958 /* Same error code as "failed to rename". */
1959 return 4;
1960 }
1961
1962 static int store_write_section(int fd, const char *key)
1963 {
1964 const char *dot;
1965 int i, success;
1966 struct strbuf sb = STRBUF_INIT;
1967
1968 dot = memchr(key, '.', store.baselen);
1969 if (dot) {
1970 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1971 for (i = dot - key + 1; i < store.baselen; i++) {
1972 if (key[i] == '"' || key[i] == '\\')
1973 strbuf_addch(&sb, '\\');
1974 strbuf_addch(&sb, key[i]);
1975 }
1976 strbuf_addstr(&sb, "\"]\n");
1977 } else {
1978 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1979 }
1980
1981 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1982 strbuf_release(&sb);
1983
1984 return success;
1985 }
1986
1987 static int store_write_pair(int fd, const char *key, const char *value)
1988 {
1989 int i, success;
1990 int length = strlen(key + store.baselen + 1);
1991 const char *quote = "";
1992 struct strbuf sb = STRBUF_INIT;
1993
1994 /*
1995 * Check to see if the value needs to be surrounded with a dq pair.
1996 * Note that problematic characters are always backslash-quoted; this
1997 * check is about not losing leading or trailing SP and strings that
1998 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1999 * configuration parser.
2000 */
2001 if (value[0] == ' ')
2002 quote = "\"";
2003 for (i = 0; value[i]; i++)
2004 if (value[i] == ';' || value[i] == '#')
2005 quote = "\"";
2006 if (i && value[i - 1] == ' ')
2007 quote = "\"";
2008
2009 strbuf_addf(&sb, "\t%.*s = %s",
2010 length, key + store.baselen + 1, quote);
2011
2012 for (i = 0; value[i]; i++)
2013 switch (value[i]) {
2014 case '\n':
2015 strbuf_addstr(&sb, "\\n");
2016 break;
2017 case '\t':
2018 strbuf_addstr(&sb, "\\t");
2019 break;
2020 case '"':
2021 case '\\':
2022 strbuf_addch(&sb, '\\');
2023 default:
2024 strbuf_addch(&sb, value[i]);
2025 break;
2026 }
2027 strbuf_addf(&sb, "%s\n", quote);
2028
2029 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2030 strbuf_release(&sb);
2031
2032 return success;
2033 }
2034
2035 static ssize_t find_beginning_of_line(const char *contents, size_t size,
2036 size_t offset_, int *found_bracket)
2037 {
2038 size_t equal_offset = size, bracket_offset = size;
2039 ssize_t offset;
2040
2041 contline:
2042 for (offset = offset_-2; offset > 0
2043 && contents[offset] != '\n'; offset--)
2044 switch (contents[offset]) {
2045 case '=': equal_offset = offset; break;
2046 case ']': bracket_offset = offset; break;
2047 }
2048 if (offset > 0 && contents[offset-1] == '\\') {
2049 offset_ = offset;
2050 goto contline;
2051 }
2052 if (bracket_offset < equal_offset) {
2053 *found_bracket = 1;
2054 offset = bracket_offset+1;
2055 } else
2056 offset++;
2057
2058 return offset;
2059 }
2060
2061 int git_config_set_in_file_gently(const char *config_filename,
2062 const char *key, const char *value)
2063 {
2064 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2065 }
2066
2067 void git_config_set_in_file(const char *config_filename,
2068 const char *key, const char *value)
2069 {
2070 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2071 }
2072
2073 int git_config_set_gently(const char *key, const char *value)
2074 {
2075 return git_config_set_multivar_gently(key, value, NULL, 0);
2076 }
2077
2078 void git_config_set(const char *key, const char *value)
2079 {
2080 git_config_set_multivar(key, value, NULL, 0);
2081 }
2082
2083 /*
2084 * If value==NULL, unset in (remove from) config,
2085 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2086 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2087 * (only add a new one)
2088 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2089 * else all matching key/values (regardless how many) are removed,
2090 * before the new pair is written.
2091 *
2092 * Returns 0 on success.
2093 *
2094 * This function does this:
2095 *
2096 * - it locks the config file by creating ".git/config.lock"
2097 *
2098 * - it then parses the config using store_aux() as validator to find
2099 * the position on the key/value pair to replace. If it is to be unset,
2100 * it must be found exactly once.
2101 *
2102 * - the config file is mmap()ed and the part before the match (if any) is
2103 * written to the lock file, then the changed part and the rest.
2104 *
2105 * - the config file is removed and the lock file rename()d to it.
2106 *
2107 */
2108 int git_config_set_multivar_in_file_gently(const char *config_filename,
2109 const char *key, const char *value,
2110 const char *value_regex,
2111 int multi_replace)
2112 {
2113 int fd = -1, in_fd = -1;
2114 int ret;
2115 struct lock_file *lock = NULL;
2116 char *filename_buf = NULL;
2117 char *contents = NULL;
2118 size_t contents_sz;
2119
2120 /* parse-key returns negative; flip the sign to feed exit(3) */
2121 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2122 if (ret)
2123 goto out_free;
2124
2125 store.multi_replace = multi_replace;
2126
2127 if (!config_filename)
2128 config_filename = filename_buf = git_pathdup("config");
2129
2130 /*
2131 * The lock serves a purpose in addition to locking: the new
2132 * contents of .git/config will be written into it.
2133 */
2134 lock = xcalloc(1, sizeof(struct lock_file));
2135 fd = hold_lock_file_for_update(lock, config_filename, 0);
2136 if (fd < 0) {
2137 error_errno("could not lock config file %s", config_filename);
2138 free(store.key);
2139 ret = CONFIG_NO_LOCK;
2140 goto out_free;
2141 }
2142
2143 /*
2144 * If .git/config does not exist yet, write a minimal version.
2145 */
2146 in_fd = open(config_filename, O_RDONLY);
2147 if ( in_fd < 0 ) {
2148 free(store.key);
2149
2150 if ( ENOENT != errno ) {
2151 error_errno("opening %s", config_filename);
2152 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2153 goto out_free;
2154 }
2155 /* if nothing to unset, error out */
2156 if (value == NULL) {
2157 ret = CONFIG_NOTHING_SET;
2158 goto out_free;
2159 }
2160
2161 store.key = (char *)key;
2162 if (!store_write_section(fd, key) ||
2163 !store_write_pair(fd, key, value))
2164 goto write_err_out;
2165 } else {
2166 struct stat st;
2167 size_t copy_begin, copy_end;
2168 int i, new_line = 0;
2169
2170 if (value_regex == NULL)
2171 store.value_regex = NULL;
2172 else if (value_regex == CONFIG_REGEX_NONE)
2173 store.value_regex = CONFIG_REGEX_NONE;
2174 else {
2175 if (value_regex[0] == '!') {
2176 store.do_not_match = 1;
2177 value_regex++;
2178 } else
2179 store.do_not_match = 0;
2180
2181 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2182 if (regcomp(store.value_regex, value_regex,
2183 REG_EXTENDED)) {
2184 error("invalid pattern: %s", value_regex);
2185 free(store.value_regex);
2186 ret = CONFIG_INVALID_PATTERN;
2187 goto out_free;
2188 }
2189 }
2190
2191 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2192 store.offset[0] = 0;
2193 store.state = START;
2194 store.seen = 0;
2195
2196 /*
2197 * After this, store.offset will contain the *end* offset
2198 * of the last match, or remain at 0 if no match was found.
2199 * As a side effect, we make sure to transform only a valid
2200 * existing config file.
2201 */
2202 if (git_config_from_file(store_aux, config_filename, NULL)) {
2203 error("invalid config file %s", config_filename);
2204 free(store.key);
2205 if (store.value_regex != NULL &&
2206 store.value_regex != CONFIG_REGEX_NONE) {
2207 regfree(store.value_regex);
2208 free(store.value_regex);
2209 }
2210 ret = CONFIG_INVALID_FILE;
2211 goto out_free;
2212 }
2213
2214 free(store.key);
2215 if (store.value_regex != NULL &&
2216 store.value_regex != CONFIG_REGEX_NONE) {
2217 regfree(store.value_regex);
2218 free(store.value_regex);
2219 }
2220
2221 /* if nothing to unset, or too many matches, error out */
2222 if ((store.seen == 0 && value == NULL) ||
2223 (store.seen > 1 && multi_replace == 0)) {
2224 ret = CONFIG_NOTHING_SET;
2225 goto out_free;
2226 }
2227
2228 if (fstat(in_fd, &st) == -1) {
2229 error_errno(_("fstat on %s failed"), config_filename);
2230 ret = CONFIG_INVALID_FILE;
2231 goto out_free;
2232 }
2233
2234 contents_sz = xsize_t(st.st_size);
2235 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2236 MAP_PRIVATE, in_fd, 0);
2237 if (contents == MAP_FAILED) {
2238 if (errno == ENODEV && S_ISDIR(st.st_mode))
2239 errno = EISDIR;
2240 error_errno("unable to mmap '%s'", config_filename);
2241 ret = CONFIG_INVALID_FILE;
2242 contents = NULL;
2243 goto out_free;
2244 }
2245 close(in_fd);
2246 in_fd = -1;
2247
2248 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2249 error_errno("chmod on %s failed", get_lock_file_path(lock));
2250 ret = CONFIG_NO_WRITE;
2251 goto out_free;
2252 }
2253
2254 if (store.seen == 0)
2255 store.seen = 1;
2256
2257 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2258 if (store.offset[i] == 0) {
2259 store.offset[i] = copy_end = contents_sz;
2260 } else if (store.state != KEY_SEEN) {
2261 copy_end = store.offset[i];
2262 } else
2263 copy_end = find_beginning_of_line(
2264 contents, contents_sz,
2265 store.offset[i]-2, &new_line);
2266
2267 if (copy_end > 0 && contents[copy_end-1] != '\n')
2268 new_line = 1;
2269
2270 /* write the first part of the config */
2271 if (copy_end > copy_begin) {
2272 if (write_in_full(fd, contents + copy_begin,
2273 copy_end - copy_begin) <
2274 copy_end - copy_begin)
2275 goto write_err_out;
2276 if (new_line &&
2277 write_str_in_full(fd, "\n") != 1)
2278 goto write_err_out;
2279 }
2280 copy_begin = store.offset[i];
2281 }
2282
2283 /* write the pair (value == NULL means unset) */
2284 if (value != NULL) {
2285 if (store.state == START) {
2286 if (!store_write_section(fd, key))
2287 goto write_err_out;
2288 }
2289 if (!store_write_pair(fd, key, value))
2290 goto write_err_out;
2291 }
2292
2293 /* write the rest of the config */
2294 if (copy_begin < contents_sz)
2295 if (write_in_full(fd, contents + copy_begin,
2296 contents_sz - copy_begin) <
2297 contents_sz - copy_begin)
2298 goto write_err_out;
2299
2300 munmap(contents, contents_sz);
2301 contents = NULL;
2302 }
2303
2304 if (commit_lock_file(lock) < 0) {
2305 error_errno("could not write config file %s", config_filename);
2306 ret = CONFIG_NO_WRITE;
2307 lock = NULL;
2308 goto out_free;
2309 }
2310
2311 /*
2312 * lock is committed, so don't try to roll it back below.
2313 * NOTE: Since lockfile.c keeps a linked list of all created
2314 * lock_file structures, it isn't safe to free(lock). It's
2315 * better to just leave it hanging around.
2316 */
2317 lock = NULL;
2318 ret = 0;
2319
2320 /* Invalidate the config cache */
2321 git_config_clear();
2322
2323 out_free:
2324 if (lock)
2325 rollback_lock_file(lock);
2326 free(filename_buf);
2327 if (contents)
2328 munmap(contents, contents_sz);
2329 if (in_fd >= 0)
2330 close(in_fd);
2331 return ret;
2332
2333 write_err_out:
2334 ret = write_error(get_lock_file_path(lock));
2335 goto out_free;
2336
2337 }
2338
2339 void git_config_set_multivar_in_file(const char *config_filename,
2340 const char *key, const char *value,
2341 const char *value_regex, int multi_replace)
2342 {
2343 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2344 value_regex, multi_replace))
2345 return;
2346 if (value)
2347 die(_("could not set '%s' to '%s'"), key, value);
2348 else
2349 die(_("could not unset '%s'"), key);
2350 }
2351
2352 int git_config_set_multivar_gently(const char *key, const char *value,
2353 const char *value_regex, int multi_replace)
2354 {
2355 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2356 multi_replace);
2357 }
2358
2359 void git_config_set_multivar(const char *key, const char *value,
2360 const char *value_regex, int multi_replace)
2361 {
2362 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2363 multi_replace);
2364 }
2365
2366 static int section_name_match (const char *buf, const char *name)
2367 {
2368 int i = 0, j = 0, dot = 0;
2369 if (buf[i] != '[')
2370 return 0;
2371 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2372 if (!dot && isspace(buf[i])) {
2373 dot = 1;
2374 if (name[j++] != '.')
2375 break;
2376 for (i++; isspace(buf[i]); i++)
2377 ; /* do nothing */
2378 if (buf[i] != '"')
2379 break;
2380 continue;
2381 }
2382 if (buf[i] == '\\' && dot)
2383 i++;
2384 else if (buf[i] == '"' && dot) {
2385 for (i++; isspace(buf[i]); i++)
2386 ; /* do_nothing */
2387 break;
2388 }
2389 if (buf[i] != name[j++])
2390 break;
2391 }
2392 if (buf[i] == ']' && name[j] == 0) {
2393 /*
2394 * We match, now just find the right length offset by
2395 * gobbling up any whitespace after it, as well
2396 */
2397 i++;
2398 for (; buf[i] && isspace(buf[i]); i++)
2399 ; /* do nothing */
2400 return i;
2401 }
2402 return 0;
2403 }
2404
2405 static int section_name_is_ok(const char *name)
2406 {
2407 /* Empty section names are bogus. */
2408 if (!*name)
2409 return 0;
2410
2411 /*
2412 * Before a dot, we must be alphanumeric or dash. After the first dot,
2413 * anything goes, so we can stop checking.
2414 */
2415 for (; *name && *name != '.'; name++)
2416 if (*name != '-' && !isalnum(*name))
2417 return 0;
2418 return 1;
2419 }
2420
2421 /* if new_name == NULL, the section is removed instead */
2422 int git_config_rename_section_in_file(const char *config_filename,
2423 const char *old_name, const char *new_name)
2424 {
2425 int ret = 0, remove = 0;
2426 char *filename_buf = NULL;
2427 struct lock_file *lock;
2428 int out_fd;
2429 char buf[1024];
2430 FILE *config_file;
2431 struct stat st;
2432
2433 if (new_name && !section_name_is_ok(new_name)) {
2434 ret = error("invalid section name: %s", new_name);
2435 goto out_no_rollback;
2436 }
2437
2438 if (!config_filename)
2439 config_filename = filename_buf = git_pathdup("config");
2440
2441 lock = xcalloc(1, sizeof(struct lock_file));
2442 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2443 if (out_fd < 0) {
2444 ret = error("could not lock config file %s", config_filename);
2445 goto out;
2446 }
2447
2448 if (!(config_file = fopen(config_filename, "rb"))) {
2449 /* no config file means nothing to rename, no error */
2450 goto commit_and_out;
2451 }
2452
2453 if (fstat(fileno(config_file), &st) == -1) {
2454 ret = error_errno(_("fstat on %s failed"), config_filename);
2455 goto out;
2456 }
2457
2458 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2459 ret = error_errno("chmod on %s failed",
2460 get_lock_file_path(lock));
2461 goto out;
2462 }
2463
2464 while (fgets(buf, sizeof(buf), config_file)) {
2465 int i;
2466 int length;
2467 char *output = buf;
2468 for (i = 0; buf[i] && isspace(buf[i]); i++)
2469 ; /* do nothing */
2470 if (buf[i] == '[') {
2471 /* it's a section */
2472 int offset = section_name_match(&buf[i], old_name);
2473 if (offset > 0) {
2474 ret++;
2475 if (new_name == NULL) {
2476 remove = 1;
2477 continue;
2478 }
2479 store.baselen = strlen(new_name);
2480 if (!store_write_section(out_fd, new_name)) {
2481 ret = write_error(get_lock_file_path(lock));
2482 goto out;
2483 }
2484 /*
2485 * We wrote out the new section, with
2486 * a newline, now skip the old
2487 * section's length
2488 */
2489 output += offset + i;
2490 if (strlen(output) > 0) {
2491 /*
2492 * More content means there's
2493 * a declaration to put on the
2494 * next line; indent with a
2495 * tab
2496 */
2497 output -= 1;
2498 output[0] = '\t';
2499 }
2500 }
2501 remove = 0;
2502 }
2503 if (remove)
2504 continue;
2505 length = strlen(output);
2506 if (write_in_full(out_fd, output, length) != length) {
2507 ret = write_error(get_lock_file_path(lock));
2508 goto out;
2509 }
2510 }
2511 fclose(config_file);
2512 commit_and_out:
2513 if (commit_lock_file(lock) < 0)
2514 ret = error_errno("could not write config file %s",
2515 config_filename);
2516 out:
2517 rollback_lock_file(lock);
2518 out_no_rollback:
2519 free(filename_buf);
2520 return ret;
2521 }
2522
2523 int git_config_rename_section(const char *old_name, const char *new_name)
2524 {
2525 return git_config_rename_section_in_file(NULL, old_name, new_name);
2526 }
2527
2528 /*
2529 * Call this to report error for your variable that should not
2530 * get a boolean value (i.e. "[my] var" means "true").
2531 */
2532 #undef config_error_nonbool
2533 int config_error_nonbool(const char *var)
2534 {
2535 return error("missing value for '%s'", var);
2536 }
2537
2538 int parse_config_key(const char *var,
2539 const char *section,
2540 const char **subsection, int *subsection_len,
2541 const char **key)
2542 {
2543 const char *dot;
2544
2545 /* Does it start with "section." ? */
2546 if (!skip_prefix(var, section, &var) || *var != '.')
2547 return -1;
2548
2549 /*
2550 * Find the key; we don't know yet if we have a subsection, but we must
2551 * parse backwards from the end, since the subsection may have dots in
2552 * it, too.
2553 */
2554 dot = strrchr(var, '.');
2555 *key = dot + 1;
2556
2557 /* Did we have a subsection at all? */
2558 if (dot == var) {
2559 if (subsection) {
2560 *subsection = NULL;
2561 *subsection_len = 0;
2562 }
2563 }
2564 else {
2565 if (!subsection)
2566 return -1;
2567 *subsection = var + 1;
2568 *subsection_len = dot - *subsection;
2569 }
2570
2571 return 0;
2572 }
2573
2574 const char *current_config_origin_type(void)
2575 {
2576 int type;
2577 if (current_config_kvi)
2578 type = current_config_kvi->origin_type;
2579 else if(cf)
2580 type = cf->origin_type;
2581 else
2582 die("BUG: current_config_origin_type called outside config callback");
2583
2584 switch (type) {
2585 case CONFIG_ORIGIN_BLOB:
2586 return "blob";
2587 case CONFIG_ORIGIN_FILE:
2588 return "file";
2589 case CONFIG_ORIGIN_STDIN:
2590 return "standard input";
2591 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2592 return "submodule-blob";
2593 case CONFIG_ORIGIN_CMDLINE:
2594 return "command line";
2595 default:
2596 die("BUG: unknown config origin type");
2597 }
2598 }
2599
2600 const char *current_config_name(void)
2601 {
2602 const char *name;
2603 if (current_config_kvi)
2604 name = current_config_kvi->filename;
2605 else if (cf)
2606 name = cf->name;
2607 else
2608 die("BUG: current_config_name called outside config callback");
2609 return name ? name : "";
2610 }
2611
2612 enum config_scope current_config_scope(void)
2613 {
2614 if (current_config_kvi)
2615 return current_config_kvi->scope;
2616 else
2617 return current_parsing_scope;
2618 }
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