Merge branch 'bw/submodule-with-bs-path'
[git/git.git] / config.c
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 #include "dir.h"
17
18 struct config_source {
19 struct config_source *prev;
20 union {
21 FILE *file;
22 struct config_buf {
23 const char *buf;
24 size_t len;
25 size_t pos;
26 } buf;
27 } u;
28 enum config_origin_type origin_type;
29 const char *name;
30 const char *path;
31 int die_on_error;
32 int linenr;
33 int eof;
34 struct strbuf value;
35 struct strbuf var;
36
37 int (*do_fgetc)(struct config_source *c);
38 int (*do_ungetc)(int c, struct config_source *conf);
39 long (*do_ftell)(struct config_source *c);
40 };
41
42 /*
43 * These variables record the "current" config source, which
44 * can be accessed by parsing callbacks.
45 *
46 * The "cf" variable will be non-NULL only when we are actually parsing a real
47 * config source (file, blob, cmdline, etc).
48 *
49 * The "current_config_kvi" variable will be non-NULL only when we are feeding
50 * cached config from a configset into a callback.
51 *
52 * They should generally never be non-NULL at the same time. If they are both
53 * NULL, then we aren't parsing anything (and depending on the function looking
54 * at the variables, it's either a bug for it to be called in the first place,
55 * or it's a function which can be reused for non-config purposes, and should
56 * fall back to some sane behavior).
57 */
58 static struct config_source *cf;
59 static struct key_value_info *current_config_kvi;
60
61 /*
62 * Similar to the variables above, this gives access to the "scope" of the
63 * current value (repo, global, etc). For cached values, it can be found via
64 * the current_config_kvi as above. During parsing, the current value can be
65 * found in this variable. It's not part of "cf" because it transcends a single
66 * file (i.e., a file included from .git/config is still in "repo" scope).
67 */
68 static enum config_scope current_parsing_scope;
69
70 static int core_compression_seen;
71 static int pack_compression_seen;
72 static int zlib_compression_seen;
73
74 /*
75 * Default config_set that contains key-value pairs from the usual set of config
76 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
77 * config file and the global /etc/gitconfig)
78 */
79 static struct config_set the_config_set;
80
81 static int config_file_fgetc(struct config_source *conf)
82 {
83 return getc_unlocked(conf->u.file);
84 }
85
86 static int config_file_ungetc(int c, struct config_source *conf)
87 {
88 return ungetc(c, conf->u.file);
89 }
90
91 static long config_file_ftell(struct config_source *conf)
92 {
93 return ftell(conf->u.file);
94 }
95
96
97 static int config_buf_fgetc(struct config_source *conf)
98 {
99 if (conf->u.buf.pos < conf->u.buf.len)
100 return conf->u.buf.buf[conf->u.buf.pos++];
101
102 return EOF;
103 }
104
105 static int config_buf_ungetc(int c, struct config_source *conf)
106 {
107 if (conf->u.buf.pos > 0) {
108 conf->u.buf.pos--;
109 if (conf->u.buf.buf[conf->u.buf.pos] != c)
110 die("BUG: config_buf can only ungetc the same character");
111 return c;
112 }
113
114 return EOF;
115 }
116
117 static long config_buf_ftell(struct config_source *conf)
118 {
119 return conf->u.buf.pos;
120 }
121
122 #define MAX_INCLUDE_DEPTH 10
123 static const char include_depth_advice[] =
124 "exceeded maximum include depth (%d) while including\n"
125 " %s\n"
126 "from\n"
127 " %s\n"
128 "Do you have circular includes?";
129 static int handle_path_include(const char *path, struct config_include_data *inc)
130 {
131 int ret = 0;
132 struct strbuf buf = STRBUF_INIT;
133 char *expanded;
134
135 if (!path)
136 return config_error_nonbool("include.path");
137
138 expanded = expand_user_path(path, 0);
139 if (!expanded)
140 return error("could not expand include path '%s'", path);
141 path = expanded;
142
143 /*
144 * Use an absolute path as-is, but interpret relative paths
145 * based on the including config file.
146 */
147 if (!is_absolute_path(path)) {
148 char *slash;
149
150 if (!cf || !cf->path)
151 return error("relative config includes must come from files");
152
153 slash = find_last_dir_sep(cf->path);
154 if (slash)
155 strbuf_add(&buf, cf->path, slash - cf->path + 1);
156 strbuf_addstr(&buf, path);
157 path = buf.buf;
158 }
159
160 if (!access_or_die(path, R_OK, 0)) {
161 if (++inc->depth > MAX_INCLUDE_DEPTH)
162 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
163 !cf ? "<unknown>" :
164 cf->name ? cf->name :
165 "the command line");
166 ret = git_config_from_file(git_config_include, path, inc);
167 inc->depth--;
168 }
169 strbuf_release(&buf);
170 free(expanded);
171 return ret;
172 }
173
174 static int prepare_include_condition_pattern(struct strbuf *pat)
175 {
176 struct strbuf path = STRBUF_INIT;
177 char *expanded;
178 int prefix = 0;
179
180 expanded = expand_user_path(pat->buf, 1);
181 if (expanded) {
182 strbuf_reset(pat);
183 strbuf_addstr(pat, expanded);
184 free(expanded);
185 }
186
187 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
188 const char *slash;
189
190 if (!cf || !cf->path)
191 return error(_("relative config include "
192 "conditionals must come from files"));
193
194 strbuf_realpath(&path, cf->path, 1);
195 slash = find_last_dir_sep(path.buf);
196 if (!slash)
197 die("BUG: how is this possible?");
198 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
199 prefix = slash - path.buf + 1 /* slash */;
200 } else if (!is_absolute_path(pat->buf))
201 strbuf_insert(pat, 0, "**/", 3);
202
203 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
204 strbuf_addstr(pat, "**");
205
206 strbuf_release(&path);
207 return prefix;
208 }
209
210 static int include_by_gitdir(const char *cond, size_t cond_len, int icase)
211 {
212 struct strbuf text = STRBUF_INIT;
213 struct strbuf pattern = STRBUF_INIT;
214 int ret = 0, prefix;
215
216 strbuf_realpath(&text, get_git_dir(), 1);
217 strbuf_add(&pattern, cond, cond_len);
218 prefix = prepare_include_condition_pattern(&pattern);
219
220 if (prefix < 0)
221 goto done;
222
223 if (prefix > 0) {
224 /*
225 * perform literal matching on the prefix part so that
226 * any wildcard character in it can't create side effects.
227 */
228 if (text.len < prefix)
229 goto done;
230 if (!icase && strncmp(pattern.buf, text.buf, prefix))
231 goto done;
232 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
233 goto done;
234 }
235
236 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
237 icase ? WM_CASEFOLD : 0, NULL);
238
239 done:
240 strbuf_release(&pattern);
241 strbuf_release(&text);
242 return ret;
243 }
244
245 static int include_condition_is_true(const char *cond, size_t cond_len)
246 {
247
248 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
249 return include_by_gitdir(cond, cond_len, 0);
250 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
251 return include_by_gitdir(cond, cond_len, 1);
252
253 /* unknown conditionals are always false */
254 return 0;
255 }
256
257 int git_config_include(const char *var, const char *value, void *data)
258 {
259 struct config_include_data *inc = data;
260 const char *cond, *key;
261 int cond_len;
262 int ret;
263
264 /*
265 * Pass along all values, including "include" directives; this makes it
266 * possible to query information on the includes themselves.
267 */
268 ret = inc->fn(var, value, inc->data);
269 if (ret < 0)
270 return ret;
271
272 if (!strcmp(var, "include.path"))
273 ret = handle_path_include(value, inc);
274
275 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
276 (cond && include_condition_is_true(cond, cond_len)) &&
277 !strcmp(key, "path"))
278 ret = handle_path_include(value, inc);
279
280 return ret;
281 }
282
283 void git_config_push_parameter(const char *text)
284 {
285 struct strbuf env = STRBUF_INIT;
286 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
287 if (old && *old) {
288 strbuf_addstr(&env, old);
289 strbuf_addch(&env, ' ');
290 }
291 sq_quote_buf(&env, text);
292 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
293 strbuf_release(&env);
294 }
295
296 static inline int iskeychar(int c)
297 {
298 return isalnum(c) || c == '-';
299 }
300
301 /*
302 * Auxiliary function to sanity-check and split the key into the section
303 * identifier and variable name.
304 *
305 * Returns 0 on success, -1 when there is an invalid character in the key and
306 * -2 if there is no section name in the key.
307 *
308 * store_key - pointer to char* which will hold a copy of the key with
309 * lowercase section and variable name
310 * baselen - pointer to int which will hold the length of the
311 * section + subsection part, can be NULL
312 */
313 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
314 {
315 int i, dot, baselen;
316 const char *last_dot = strrchr(key, '.');
317
318 /*
319 * Since "key" actually contains the section name and the real
320 * key name separated by a dot, we have to know where the dot is.
321 */
322
323 if (last_dot == NULL || last_dot == key) {
324 if (!quiet)
325 error("key does not contain a section: %s", key);
326 return -CONFIG_NO_SECTION_OR_NAME;
327 }
328
329 if (!last_dot[1]) {
330 if (!quiet)
331 error("key does not contain variable name: %s", key);
332 return -CONFIG_NO_SECTION_OR_NAME;
333 }
334
335 baselen = last_dot - key;
336 if (baselen_)
337 *baselen_ = baselen;
338
339 /*
340 * Validate the key and while at it, lower case it for matching.
341 */
342 if (store_key)
343 *store_key = xmallocz(strlen(key));
344
345 dot = 0;
346 for (i = 0; key[i]; i++) {
347 unsigned char c = key[i];
348 if (c == '.')
349 dot = 1;
350 /* Leave the extended basename untouched.. */
351 if (!dot || i > baselen) {
352 if (!iskeychar(c) ||
353 (i == baselen + 1 && !isalpha(c))) {
354 if (!quiet)
355 error("invalid key: %s", key);
356 goto out_free_ret_1;
357 }
358 c = tolower(c);
359 } else if (c == '\n') {
360 if (!quiet)
361 error("invalid key (newline): %s", key);
362 goto out_free_ret_1;
363 }
364 if (store_key)
365 (*store_key)[i] = c;
366 }
367
368 return 0;
369
370 out_free_ret_1:
371 if (store_key) {
372 free(*store_key);
373 *store_key = NULL;
374 }
375 return -CONFIG_INVALID_KEY;
376 }
377
378 int git_config_parse_key(const char *key, char **store_key, int *baselen)
379 {
380 return git_config_parse_key_1(key, store_key, baselen, 0);
381 }
382
383 int git_config_key_is_valid(const char *key)
384 {
385 return !git_config_parse_key_1(key, NULL, NULL, 1);
386 }
387
388 int git_config_parse_parameter(const char *text,
389 config_fn_t fn, void *data)
390 {
391 const char *value;
392 char *canonical_name;
393 struct strbuf **pair;
394 int ret;
395
396 pair = strbuf_split_str(text, '=', 2);
397 if (!pair[0])
398 return error("bogus config parameter: %s", text);
399
400 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
401 strbuf_setlen(pair[0], pair[0]->len - 1);
402 value = pair[1] ? pair[1]->buf : "";
403 } else {
404 value = NULL;
405 }
406
407 strbuf_trim(pair[0]);
408 if (!pair[0]->len) {
409 strbuf_list_free(pair);
410 return error("bogus config parameter: %s", text);
411 }
412
413 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
414 ret = -1;
415 } else {
416 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
417 free(canonical_name);
418 }
419 strbuf_list_free(pair);
420 return ret;
421 }
422
423 int git_config_from_parameters(config_fn_t fn, void *data)
424 {
425 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
426 int ret = 0;
427 char *envw;
428 const char **argv = NULL;
429 int nr = 0, alloc = 0;
430 int i;
431 struct config_source source;
432
433 if (!env)
434 return 0;
435
436 memset(&source, 0, sizeof(source));
437 source.prev = cf;
438 source.origin_type = CONFIG_ORIGIN_CMDLINE;
439 cf = &source;
440
441 /* sq_dequote will write over it */
442 envw = xstrdup(env);
443
444 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
445 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
446 goto out;
447 }
448
449 for (i = 0; i < nr; i++) {
450 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
451 ret = -1;
452 goto out;
453 }
454 }
455
456 out:
457 free(argv);
458 free(envw);
459 cf = source.prev;
460 return ret;
461 }
462
463 static int get_next_char(void)
464 {
465 int c = cf->do_fgetc(cf);
466
467 if (c == '\r') {
468 /* DOS like systems */
469 c = cf->do_fgetc(cf);
470 if (c != '\n') {
471 if (c != EOF)
472 cf->do_ungetc(c, cf);
473 c = '\r';
474 }
475 }
476 if (c == '\n')
477 cf->linenr++;
478 if (c == EOF) {
479 cf->eof = 1;
480 cf->linenr++;
481 c = '\n';
482 }
483 return c;
484 }
485
486 static char *parse_value(void)
487 {
488 int quote = 0, comment = 0, space = 0;
489
490 strbuf_reset(&cf->value);
491 for (;;) {
492 int c = get_next_char();
493 if (c == '\n') {
494 if (quote) {
495 cf->linenr--;
496 return NULL;
497 }
498 return cf->value.buf;
499 }
500 if (comment)
501 continue;
502 if (isspace(c) && !quote) {
503 if (cf->value.len)
504 space++;
505 continue;
506 }
507 if (!quote) {
508 if (c == ';' || c == '#') {
509 comment = 1;
510 continue;
511 }
512 }
513 for (; space; space--)
514 strbuf_addch(&cf->value, ' ');
515 if (c == '\\') {
516 c = get_next_char();
517 switch (c) {
518 case '\n':
519 continue;
520 case 't':
521 c = '\t';
522 break;
523 case 'b':
524 c = '\b';
525 break;
526 case 'n':
527 c = '\n';
528 break;
529 /* Some characters escape as themselves */
530 case '\\': case '"':
531 break;
532 /* Reject unknown escape sequences */
533 default:
534 return NULL;
535 }
536 strbuf_addch(&cf->value, c);
537 continue;
538 }
539 if (c == '"') {
540 quote = 1-quote;
541 continue;
542 }
543 strbuf_addch(&cf->value, c);
544 }
545 }
546
547 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
548 {
549 int c;
550 char *value;
551 int ret;
552
553 /* Get the full name */
554 for (;;) {
555 c = get_next_char();
556 if (cf->eof)
557 break;
558 if (!iskeychar(c))
559 break;
560 strbuf_addch(name, tolower(c));
561 }
562
563 while (c == ' ' || c == '\t')
564 c = get_next_char();
565
566 value = NULL;
567 if (c != '\n') {
568 if (c != '=')
569 return -1;
570 value = parse_value();
571 if (!value)
572 return -1;
573 }
574 /*
575 * We already consumed the \n, but we need linenr to point to
576 * the line we just parsed during the call to fn to get
577 * accurate line number in error messages.
578 */
579 cf->linenr--;
580 ret = fn(name->buf, value, data);
581 cf->linenr++;
582 return ret;
583 }
584
585 static int get_extended_base_var(struct strbuf *name, int c)
586 {
587 do {
588 if (c == '\n')
589 goto error_incomplete_line;
590 c = get_next_char();
591 } while (isspace(c));
592
593 /* We require the format to be '[base "extension"]' */
594 if (c != '"')
595 return -1;
596 strbuf_addch(name, '.');
597
598 for (;;) {
599 int c = get_next_char();
600 if (c == '\n')
601 goto error_incomplete_line;
602 if (c == '"')
603 break;
604 if (c == '\\') {
605 c = get_next_char();
606 if (c == '\n')
607 goto error_incomplete_line;
608 }
609 strbuf_addch(name, c);
610 }
611
612 /* Final ']' */
613 if (get_next_char() != ']')
614 return -1;
615 return 0;
616 error_incomplete_line:
617 cf->linenr--;
618 return -1;
619 }
620
621 static int get_base_var(struct strbuf *name)
622 {
623 for (;;) {
624 int c = get_next_char();
625 if (cf->eof)
626 return -1;
627 if (c == ']')
628 return 0;
629 if (isspace(c))
630 return get_extended_base_var(name, c);
631 if (!iskeychar(c) && c != '.')
632 return -1;
633 strbuf_addch(name, tolower(c));
634 }
635 }
636
637 static int git_parse_source(config_fn_t fn, void *data)
638 {
639 int comment = 0;
640 int baselen = 0;
641 struct strbuf *var = &cf->var;
642 int error_return = 0;
643 char *error_msg = NULL;
644
645 /* U+FEFF Byte Order Mark in UTF8 */
646 const char *bomptr = utf8_bom;
647
648 for (;;) {
649 int c = get_next_char();
650 if (bomptr && *bomptr) {
651 /* We are at the file beginning; skip UTF8-encoded BOM
652 * if present. Sane editors won't put this in on their
653 * own, but e.g. Windows Notepad will do it happily. */
654 if (c == (*bomptr & 0377)) {
655 bomptr++;
656 continue;
657 } else {
658 /* Do not tolerate partial BOM. */
659 if (bomptr != utf8_bom)
660 break;
661 /* No BOM at file beginning. Cool. */
662 bomptr = NULL;
663 }
664 }
665 if (c == '\n') {
666 if (cf->eof)
667 return 0;
668 comment = 0;
669 continue;
670 }
671 if (comment || isspace(c))
672 continue;
673 if (c == '#' || c == ';') {
674 comment = 1;
675 continue;
676 }
677 if (c == '[') {
678 /* Reset prior to determining a new stem */
679 strbuf_reset(var);
680 if (get_base_var(var) < 0 || var->len < 1)
681 break;
682 strbuf_addch(var, '.');
683 baselen = var->len;
684 continue;
685 }
686 if (!isalpha(c))
687 break;
688 /*
689 * Truncate the var name back to the section header
690 * stem prior to grabbing the suffix part of the name
691 * and the value.
692 */
693 strbuf_setlen(var, baselen);
694 strbuf_addch(var, tolower(c));
695 if (get_value(fn, data, var) < 0)
696 break;
697 }
698
699 switch (cf->origin_type) {
700 case CONFIG_ORIGIN_BLOB:
701 error_msg = xstrfmt(_("bad config line %d in blob %s"),
702 cf->linenr, cf->name);
703 break;
704 case CONFIG_ORIGIN_FILE:
705 error_msg = xstrfmt(_("bad config line %d in file %s"),
706 cf->linenr, cf->name);
707 break;
708 case CONFIG_ORIGIN_STDIN:
709 error_msg = xstrfmt(_("bad config line %d in standard input"),
710 cf->linenr);
711 break;
712 case CONFIG_ORIGIN_SUBMODULE_BLOB:
713 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
714 cf->linenr, cf->name);
715 break;
716 case CONFIG_ORIGIN_CMDLINE:
717 error_msg = xstrfmt(_("bad config line %d in command line %s"),
718 cf->linenr, cf->name);
719 break;
720 default:
721 error_msg = xstrfmt(_("bad config line %d in %s"),
722 cf->linenr, cf->name);
723 }
724
725 if (cf->die_on_error)
726 die("%s", error_msg);
727 else
728 error_return = error("%s", error_msg);
729
730 free(error_msg);
731 return error_return;
732 }
733
734 static int parse_unit_factor(const char *end, uintmax_t *val)
735 {
736 if (!*end)
737 return 1;
738 else if (!strcasecmp(end, "k")) {
739 *val *= 1024;
740 return 1;
741 }
742 else if (!strcasecmp(end, "m")) {
743 *val *= 1024 * 1024;
744 return 1;
745 }
746 else if (!strcasecmp(end, "g")) {
747 *val *= 1024 * 1024 * 1024;
748 return 1;
749 }
750 return 0;
751 }
752
753 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
754 {
755 if (value && *value) {
756 char *end;
757 intmax_t val;
758 uintmax_t uval;
759 uintmax_t factor = 1;
760
761 errno = 0;
762 val = strtoimax(value, &end, 0);
763 if (errno == ERANGE)
764 return 0;
765 if (!parse_unit_factor(end, &factor)) {
766 errno = EINVAL;
767 return 0;
768 }
769 uval = labs(val);
770 uval *= factor;
771 if (uval > max || labs(val) > uval) {
772 errno = ERANGE;
773 return 0;
774 }
775 val *= factor;
776 *ret = val;
777 return 1;
778 }
779 errno = EINVAL;
780 return 0;
781 }
782
783 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
784 {
785 if (value && *value) {
786 char *end;
787 uintmax_t val;
788 uintmax_t oldval;
789
790 errno = 0;
791 val = strtoumax(value, &end, 0);
792 if (errno == ERANGE)
793 return 0;
794 oldval = val;
795 if (!parse_unit_factor(end, &val)) {
796 errno = EINVAL;
797 return 0;
798 }
799 if (val > max || oldval > val) {
800 errno = ERANGE;
801 return 0;
802 }
803 *ret = val;
804 return 1;
805 }
806 errno = EINVAL;
807 return 0;
808 }
809
810 static int git_parse_int(const char *value, int *ret)
811 {
812 intmax_t tmp;
813 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
814 return 0;
815 *ret = tmp;
816 return 1;
817 }
818
819 static int git_parse_int64(const char *value, int64_t *ret)
820 {
821 intmax_t tmp;
822 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
823 return 0;
824 *ret = tmp;
825 return 1;
826 }
827
828 int git_parse_ulong(const char *value, unsigned long *ret)
829 {
830 uintmax_t tmp;
831 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
832 return 0;
833 *ret = tmp;
834 return 1;
835 }
836
837 static int git_parse_ssize_t(const char *value, ssize_t *ret)
838 {
839 intmax_t tmp;
840 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
841 return 0;
842 *ret = tmp;
843 return 1;
844 }
845
846 NORETURN
847 static void die_bad_number(const char *name, const char *value)
848 {
849 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
850
851 if (!value)
852 value = "";
853
854 if (!(cf && cf->name))
855 die(_("bad numeric config value '%s' for '%s': %s"),
856 value, name, error_type);
857
858 switch (cf->origin_type) {
859 case CONFIG_ORIGIN_BLOB:
860 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
861 value, name, cf->name, error_type);
862 case CONFIG_ORIGIN_FILE:
863 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
864 value, name, cf->name, error_type);
865 case CONFIG_ORIGIN_STDIN:
866 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
867 value, name, error_type);
868 case CONFIG_ORIGIN_SUBMODULE_BLOB:
869 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
870 value, name, cf->name, error_type);
871 case CONFIG_ORIGIN_CMDLINE:
872 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
873 value, name, cf->name, error_type);
874 default:
875 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
876 value, name, cf->name, error_type);
877 }
878 }
879
880 int git_config_int(const char *name, const char *value)
881 {
882 int ret;
883 if (!git_parse_int(value, &ret))
884 die_bad_number(name, value);
885 return ret;
886 }
887
888 int64_t git_config_int64(const char *name, const char *value)
889 {
890 int64_t ret;
891 if (!git_parse_int64(value, &ret))
892 die_bad_number(name, value);
893 return ret;
894 }
895
896 unsigned long git_config_ulong(const char *name, const char *value)
897 {
898 unsigned long ret;
899 if (!git_parse_ulong(value, &ret))
900 die_bad_number(name, value);
901 return ret;
902 }
903
904 ssize_t git_config_ssize_t(const char *name, const char *value)
905 {
906 ssize_t ret;
907 if (!git_parse_ssize_t(value, &ret))
908 die_bad_number(name, value);
909 return ret;
910 }
911
912 int git_parse_maybe_bool(const char *value)
913 {
914 if (!value)
915 return 1;
916 if (!*value)
917 return 0;
918 if (!strcasecmp(value, "true")
919 || !strcasecmp(value, "yes")
920 || !strcasecmp(value, "on"))
921 return 1;
922 if (!strcasecmp(value, "false")
923 || !strcasecmp(value, "no")
924 || !strcasecmp(value, "off"))
925 return 0;
926 return -1;
927 }
928
929 int git_config_maybe_bool(const char *name, const char *value)
930 {
931 int v = git_parse_maybe_bool(value);
932 if (0 <= v)
933 return v;
934 if (git_parse_int(value, &v))
935 return !!v;
936 return -1;
937 }
938
939 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
940 {
941 int v = git_parse_maybe_bool(value);
942 if (0 <= v) {
943 *is_bool = 1;
944 return v;
945 }
946 *is_bool = 0;
947 return git_config_int(name, value);
948 }
949
950 int git_config_bool(const char *name, const char *value)
951 {
952 int discard;
953 return !!git_config_bool_or_int(name, value, &discard);
954 }
955
956 int git_config_string(const char **dest, const char *var, const char *value)
957 {
958 if (!value)
959 return config_error_nonbool(var);
960 *dest = xstrdup(value);
961 return 0;
962 }
963
964 int git_config_pathname(const char **dest, const char *var, const char *value)
965 {
966 if (!value)
967 return config_error_nonbool(var);
968 *dest = expand_user_path(value, 0);
969 if (!*dest)
970 die(_("failed to expand user dir in: '%s'"), value);
971 return 0;
972 }
973
974 static int git_default_core_config(const char *var, const char *value)
975 {
976 /* This needs a better name */
977 if (!strcmp(var, "core.filemode")) {
978 trust_executable_bit = git_config_bool(var, value);
979 return 0;
980 }
981 if (!strcmp(var, "core.trustctime")) {
982 trust_ctime = git_config_bool(var, value);
983 return 0;
984 }
985 if (!strcmp(var, "core.checkstat")) {
986 if (!strcasecmp(value, "default"))
987 check_stat = 1;
988 else if (!strcasecmp(value, "minimal"))
989 check_stat = 0;
990 }
991
992 if (!strcmp(var, "core.quotepath")) {
993 quote_path_fully = git_config_bool(var, value);
994 return 0;
995 }
996
997 if (!strcmp(var, "core.symlinks")) {
998 has_symlinks = git_config_bool(var, value);
999 return 0;
1000 }
1001
1002 if (!strcmp(var, "core.ignorecase")) {
1003 ignore_case = git_config_bool(var, value);
1004 return 0;
1005 }
1006
1007 if (!strcmp(var, "core.attributesfile"))
1008 return git_config_pathname(&git_attributes_file, var, value);
1009
1010 if (!strcmp(var, "core.hookspath"))
1011 return git_config_pathname(&git_hooks_path, var, value);
1012
1013 if (!strcmp(var, "core.bare")) {
1014 is_bare_repository_cfg = git_config_bool(var, value);
1015 return 0;
1016 }
1017
1018 if (!strcmp(var, "core.ignorestat")) {
1019 assume_unchanged = git_config_bool(var, value);
1020 return 0;
1021 }
1022
1023 if (!strcmp(var, "core.prefersymlinkrefs")) {
1024 prefer_symlink_refs = git_config_bool(var, value);
1025 return 0;
1026 }
1027
1028 if (!strcmp(var, "core.logallrefupdates")) {
1029 if (value && !strcasecmp(value, "always"))
1030 log_all_ref_updates = LOG_REFS_ALWAYS;
1031 else if (git_config_bool(var, value))
1032 log_all_ref_updates = LOG_REFS_NORMAL;
1033 else
1034 log_all_ref_updates = LOG_REFS_NONE;
1035 return 0;
1036 }
1037
1038 if (!strcmp(var, "core.warnambiguousrefs")) {
1039 warn_ambiguous_refs = git_config_bool(var, value);
1040 return 0;
1041 }
1042
1043 if (!strcmp(var, "core.abbrev")) {
1044 if (!value)
1045 return config_error_nonbool(var);
1046 if (!strcasecmp(value, "auto"))
1047 default_abbrev = -1;
1048 else {
1049 int abbrev = git_config_int(var, value);
1050 if (abbrev < minimum_abbrev || abbrev > 40)
1051 return error("abbrev length out of range: %d", abbrev);
1052 default_abbrev = abbrev;
1053 }
1054 return 0;
1055 }
1056
1057 if (!strcmp(var, "core.disambiguate"))
1058 return set_disambiguate_hint_config(var, value);
1059
1060 if (!strcmp(var, "core.loosecompression")) {
1061 int level = git_config_int(var, value);
1062 if (level == -1)
1063 level = Z_DEFAULT_COMPRESSION;
1064 else if (level < 0 || level > Z_BEST_COMPRESSION)
1065 die(_("bad zlib compression level %d"), level);
1066 zlib_compression_level = level;
1067 zlib_compression_seen = 1;
1068 return 0;
1069 }
1070
1071 if (!strcmp(var, "core.compression")) {
1072 int level = git_config_int(var, value);
1073 if (level == -1)
1074 level = Z_DEFAULT_COMPRESSION;
1075 else if (level < 0 || level > Z_BEST_COMPRESSION)
1076 die(_("bad zlib compression level %d"), level);
1077 core_compression_level = level;
1078 core_compression_seen = 1;
1079 if (!zlib_compression_seen)
1080 zlib_compression_level = level;
1081 if (!pack_compression_seen)
1082 pack_compression_level = level;
1083 return 0;
1084 }
1085
1086 if (!strcmp(var, "core.packedgitwindowsize")) {
1087 int pgsz_x2 = getpagesize() * 2;
1088 packed_git_window_size = git_config_ulong(var, value);
1089
1090 /* This value must be multiple of (pagesize * 2) */
1091 packed_git_window_size /= pgsz_x2;
1092 if (packed_git_window_size < 1)
1093 packed_git_window_size = 1;
1094 packed_git_window_size *= pgsz_x2;
1095 return 0;
1096 }
1097
1098 if (!strcmp(var, "core.bigfilethreshold")) {
1099 big_file_threshold = git_config_ulong(var, value);
1100 return 0;
1101 }
1102
1103 if (!strcmp(var, "core.packedgitlimit")) {
1104 packed_git_limit = git_config_ulong(var, value);
1105 return 0;
1106 }
1107
1108 if (!strcmp(var, "core.deltabasecachelimit")) {
1109 delta_base_cache_limit = git_config_ulong(var, value);
1110 return 0;
1111 }
1112
1113 if (!strcmp(var, "core.autocrlf")) {
1114 if (value && !strcasecmp(value, "input")) {
1115 auto_crlf = AUTO_CRLF_INPUT;
1116 return 0;
1117 }
1118 auto_crlf = git_config_bool(var, value);
1119 return 0;
1120 }
1121
1122 if (!strcmp(var, "core.safecrlf")) {
1123 if (value && !strcasecmp(value, "warn")) {
1124 safe_crlf = SAFE_CRLF_WARN;
1125 return 0;
1126 }
1127 safe_crlf = git_config_bool(var, value);
1128 return 0;
1129 }
1130
1131 if (!strcmp(var, "core.eol")) {
1132 if (value && !strcasecmp(value, "lf"))
1133 core_eol = EOL_LF;
1134 else if (value && !strcasecmp(value, "crlf"))
1135 core_eol = EOL_CRLF;
1136 else if (value && !strcasecmp(value, "native"))
1137 core_eol = EOL_NATIVE;
1138 else
1139 core_eol = EOL_UNSET;
1140 return 0;
1141 }
1142
1143 if (!strcmp(var, "core.notesref")) {
1144 notes_ref_name = xstrdup(value);
1145 return 0;
1146 }
1147
1148 if (!strcmp(var, "core.editor"))
1149 return git_config_string(&editor_program, var, value);
1150
1151 if (!strcmp(var, "core.commentchar")) {
1152 if (!value)
1153 return config_error_nonbool(var);
1154 else if (!strcasecmp(value, "auto"))
1155 auto_comment_line_char = 1;
1156 else if (value[0] && !value[1]) {
1157 comment_line_char = value[0];
1158 auto_comment_line_char = 0;
1159 } else
1160 return error("core.commentChar should only be one character");
1161 return 0;
1162 }
1163
1164 if (!strcmp(var, "core.askpass"))
1165 return git_config_string(&askpass_program, var, value);
1166
1167 if (!strcmp(var, "core.excludesfile"))
1168 return git_config_pathname(&excludes_file, var, value);
1169
1170 if (!strcmp(var, "core.whitespace")) {
1171 if (!value)
1172 return config_error_nonbool(var);
1173 whitespace_rule_cfg = parse_whitespace_rule(value);
1174 return 0;
1175 }
1176
1177 if (!strcmp(var, "core.fsyncobjectfiles")) {
1178 fsync_object_files = git_config_bool(var, value);
1179 return 0;
1180 }
1181
1182 if (!strcmp(var, "core.preloadindex")) {
1183 core_preload_index = git_config_bool(var, value);
1184 return 0;
1185 }
1186
1187 if (!strcmp(var, "core.createobject")) {
1188 if (!strcmp(value, "rename"))
1189 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1190 else if (!strcmp(value, "link"))
1191 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1192 else
1193 die(_("invalid mode for object creation: %s"), value);
1194 return 0;
1195 }
1196
1197 if (!strcmp(var, "core.sparsecheckout")) {
1198 core_apply_sparse_checkout = git_config_bool(var, value);
1199 return 0;
1200 }
1201
1202 if (!strcmp(var, "core.precomposeunicode")) {
1203 precomposed_unicode = git_config_bool(var, value);
1204 return 0;
1205 }
1206
1207 if (!strcmp(var, "core.protecthfs")) {
1208 protect_hfs = git_config_bool(var, value);
1209 return 0;
1210 }
1211
1212 if (!strcmp(var, "core.protectntfs")) {
1213 protect_ntfs = git_config_bool(var, value);
1214 return 0;
1215 }
1216
1217 if (!strcmp(var, "core.hidedotfiles")) {
1218 if (value && !strcasecmp(value, "dotgitonly"))
1219 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1220 else
1221 hide_dotfiles = git_config_bool(var, value);
1222 return 0;
1223 }
1224
1225 /* Add other config variables here and to Documentation/config.txt. */
1226 return 0;
1227 }
1228
1229 static int git_default_i18n_config(const char *var, const char *value)
1230 {
1231 if (!strcmp(var, "i18n.commitencoding"))
1232 return git_config_string(&git_commit_encoding, var, value);
1233
1234 if (!strcmp(var, "i18n.logoutputencoding"))
1235 return git_config_string(&git_log_output_encoding, var, value);
1236
1237 /* Add other config variables here and to Documentation/config.txt. */
1238 return 0;
1239 }
1240
1241 static int git_default_branch_config(const char *var, const char *value)
1242 {
1243 if (!strcmp(var, "branch.autosetupmerge")) {
1244 if (value && !strcasecmp(value, "always")) {
1245 git_branch_track = BRANCH_TRACK_ALWAYS;
1246 return 0;
1247 }
1248 git_branch_track = git_config_bool(var, value);
1249 return 0;
1250 }
1251 if (!strcmp(var, "branch.autosetuprebase")) {
1252 if (!value)
1253 return config_error_nonbool(var);
1254 else if (!strcmp(value, "never"))
1255 autorebase = AUTOREBASE_NEVER;
1256 else if (!strcmp(value, "local"))
1257 autorebase = AUTOREBASE_LOCAL;
1258 else if (!strcmp(value, "remote"))
1259 autorebase = AUTOREBASE_REMOTE;
1260 else if (!strcmp(value, "always"))
1261 autorebase = AUTOREBASE_ALWAYS;
1262 else
1263 return error("malformed value for %s", var);
1264 return 0;
1265 }
1266
1267 /* Add other config variables here and to Documentation/config.txt. */
1268 return 0;
1269 }
1270
1271 static int git_default_push_config(const char *var, const char *value)
1272 {
1273 if (!strcmp(var, "push.default")) {
1274 if (!value)
1275 return config_error_nonbool(var);
1276 else if (!strcmp(value, "nothing"))
1277 push_default = PUSH_DEFAULT_NOTHING;
1278 else if (!strcmp(value, "matching"))
1279 push_default = PUSH_DEFAULT_MATCHING;
1280 else if (!strcmp(value, "simple"))
1281 push_default = PUSH_DEFAULT_SIMPLE;
1282 else if (!strcmp(value, "upstream"))
1283 push_default = PUSH_DEFAULT_UPSTREAM;
1284 else if (!strcmp(value, "tracking")) /* deprecated */
1285 push_default = PUSH_DEFAULT_UPSTREAM;
1286 else if (!strcmp(value, "current"))
1287 push_default = PUSH_DEFAULT_CURRENT;
1288 else {
1289 error("malformed value for %s: %s", var, value);
1290 return error("Must be one of nothing, matching, simple, "
1291 "upstream or current.");
1292 }
1293 return 0;
1294 }
1295
1296 /* Add other config variables here and to Documentation/config.txt. */
1297 return 0;
1298 }
1299
1300 static int git_default_mailmap_config(const char *var, const char *value)
1301 {
1302 if (!strcmp(var, "mailmap.file"))
1303 return git_config_pathname(&git_mailmap_file, var, value);
1304 if (!strcmp(var, "mailmap.blob"))
1305 return git_config_string(&git_mailmap_blob, var, value);
1306
1307 /* Add other config variables here and to Documentation/config.txt. */
1308 return 0;
1309 }
1310
1311 int git_default_config(const char *var, const char *value, void *dummy)
1312 {
1313 if (starts_with(var, "core."))
1314 return git_default_core_config(var, value);
1315
1316 if (starts_with(var, "user."))
1317 return git_ident_config(var, value, dummy);
1318
1319 if (starts_with(var, "i18n."))
1320 return git_default_i18n_config(var, value);
1321
1322 if (starts_with(var, "branch."))
1323 return git_default_branch_config(var, value);
1324
1325 if (starts_with(var, "push."))
1326 return git_default_push_config(var, value);
1327
1328 if (starts_with(var, "mailmap."))
1329 return git_default_mailmap_config(var, value);
1330
1331 if (starts_with(var, "advice."))
1332 return git_default_advice_config(var, value);
1333
1334 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1335 pager_use_color = git_config_bool(var,value);
1336 return 0;
1337 }
1338
1339 if (!strcmp(var, "pack.packsizelimit")) {
1340 pack_size_limit_cfg = git_config_ulong(var, value);
1341 return 0;
1342 }
1343
1344 if (!strcmp(var, "pack.compression")) {
1345 int level = git_config_int(var, value);
1346 if (level == -1)
1347 level = Z_DEFAULT_COMPRESSION;
1348 else if (level < 0 || level > Z_BEST_COMPRESSION)
1349 die(_("bad pack compression level %d"), level);
1350 pack_compression_level = level;
1351 pack_compression_seen = 1;
1352 return 0;
1353 }
1354
1355 /* Add other config variables here and to Documentation/config.txt. */
1356 return 0;
1357 }
1358
1359 /*
1360 * All source specific fields in the union, die_on_error, name and the callbacks
1361 * fgetc, ungetc, ftell of top need to be initialized before calling
1362 * this function.
1363 */
1364 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1365 {
1366 int ret;
1367
1368 /* push config-file parsing state stack */
1369 top->prev = cf;
1370 top->linenr = 1;
1371 top->eof = 0;
1372 strbuf_init(&top->value, 1024);
1373 strbuf_init(&top->var, 1024);
1374 cf = top;
1375
1376 ret = git_parse_source(fn, data);
1377
1378 /* pop config-file parsing state stack */
1379 strbuf_release(&top->value);
1380 strbuf_release(&top->var);
1381 cf = top->prev;
1382
1383 return ret;
1384 }
1385
1386 static int do_config_from_file(config_fn_t fn,
1387 const enum config_origin_type origin_type,
1388 const char *name, const char *path, FILE *f,
1389 void *data)
1390 {
1391 struct config_source top;
1392
1393 top.u.file = f;
1394 top.origin_type = origin_type;
1395 top.name = name;
1396 top.path = path;
1397 top.die_on_error = 1;
1398 top.do_fgetc = config_file_fgetc;
1399 top.do_ungetc = config_file_ungetc;
1400 top.do_ftell = config_file_ftell;
1401
1402 return do_config_from(&top, fn, data);
1403 }
1404
1405 static int git_config_from_stdin(config_fn_t fn, void *data)
1406 {
1407 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1408 }
1409
1410 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1411 {
1412 int ret = -1;
1413 FILE *f;
1414
1415 f = fopen(filename, "r");
1416 if (f) {
1417 flockfile(f);
1418 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1419 funlockfile(f);
1420 fclose(f);
1421 }
1422 return ret;
1423 }
1424
1425 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1426 const char *name, const char *buf, size_t len, void *data)
1427 {
1428 struct config_source top;
1429
1430 top.u.buf.buf = buf;
1431 top.u.buf.len = len;
1432 top.u.buf.pos = 0;
1433 top.origin_type = origin_type;
1434 top.name = name;
1435 top.path = NULL;
1436 top.die_on_error = 0;
1437 top.do_fgetc = config_buf_fgetc;
1438 top.do_ungetc = config_buf_ungetc;
1439 top.do_ftell = config_buf_ftell;
1440
1441 return do_config_from(&top, fn, data);
1442 }
1443
1444 int git_config_from_blob_sha1(config_fn_t fn,
1445 const char *name,
1446 const unsigned char *sha1,
1447 void *data)
1448 {
1449 enum object_type type;
1450 char *buf;
1451 unsigned long size;
1452 int ret;
1453
1454 buf = read_sha1_file(sha1, &type, &size);
1455 if (!buf)
1456 return error("unable to load config blob object '%s'", name);
1457 if (type != OBJ_BLOB) {
1458 free(buf);
1459 return error("reference '%s' does not point to a blob", name);
1460 }
1461
1462 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1463 free(buf);
1464
1465 return ret;
1466 }
1467
1468 static int git_config_from_blob_ref(config_fn_t fn,
1469 const char *name,
1470 void *data)
1471 {
1472 unsigned char sha1[20];
1473
1474 if (get_sha1(name, sha1) < 0)
1475 return error("unable to resolve config blob '%s'", name);
1476 return git_config_from_blob_sha1(fn, name, sha1, data);
1477 }
1478
1479 const char *git_etc_gitconfig(void)
1480 {
1481 static const char *system_wide;
1482 if (!system_wide)
1483 system_wide = system_path(ETC_GITCONFIG);
1484 return system_wide;
1485 }
1486
1487 /*
1488 * Parse environment variable 'k' as a boolean (in various
1489 * possible spellings); if missing, use the default value 'def'.
1490 */
1491 int git_env_bool(const char *k, int def)
1492 {
1493 const char *v = getenv(k);
1494 return v ? git_config_bool(k, v) : def;
1495 }
1496
1497 /*
1498 * Parse environment variable 'k' as ulong with possibly a unit
1499 * suffix; if missing, use the default value 'val'.
1500 */
1501 unsigned long git_env_ulong(const char *k, unsigned long val)
1502 {
1503 const char *v = getenv(k);
1504 if (v && !git_parse_ulong(v, &val))
1505 die("failed to parse %s", k);
1506 return val;
1507 }
1508
1509 int git_config_system(void)
1510 {
1511 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1512 }
1513
1514 static int do_git_config_sequence(config_fn_t fn, void *data)
1515 {
1516 int ret = 0;
1517 char *xdg_config = xdg_config_home("config");
1518 char *user_config = expand_user_path("~/.gitconfig", 0);
1519 char *repo_config = have_git_dir() ? git_pathdup("config") : NULL;
1520
1521 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1522 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1523 ret += git_config_from_file(fn, git_etc_gitconfig(),
1524 data);
1525
1526 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1527 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1528 ret += git_config_from_file(fn, xdg_config, data);
1529
1530 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1531 ret += git_config_from_file(fn, user_config, data);
1532
1533 current_parsing_scope = CONFIG_SCOPE_REPO;
1534 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1535 ret += git_config_from_file(fn, repo_config, data);
1536
1537 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1538 if (git_config_from_parameters(fn, data) < 0)
1539 die(_("unable to parse command-line config"));
1540
1541 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1542 free(xdg_config);
1543 free(user_config);
1544 free(repo_config);
1545 return ret;
1546 }
1547
1548 int git_config_with_options(config_fn_t fn, void *data,
1549 struct git_config_source *config_source,
1550 int respect_includes)
1551 {
1552 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1553
1554 if (respect_includes) {
1555 inc.fn = fn;
1556 inc.data = data;
1557 fn = git_config_include;
1558 data = &inc;
1559 }
1560
1561 /*
1562 * If we have a specific filename, use it. Otherwise, follow the
1563 * regular lookup sequence.
1564 */
1565 if (config_source && config_source->use_stdin)
1566 return git_config_from_stdin(fn, data);
1567 else if (config_source && config_source->file)
1568 return git_config_from_file(fn, config_source->file, data);
1569 else if (config_source && config_source->blob)
1570 return git_config_from_blob_ref(fn, config_source->blob, data);
1571
1572 return do_git_config_sequence(fn, data);
1573 }
1574
1575 static void git_config_raw(config_fn_t fn, void *data)
1576 {
1577 if (git_config_with_options(fn, data, NULL, 1) < 0)
1578 /*
1579 * git_config_with_options() normally returns only
1580 * zero, as most errors are fatal, and
1581 * non-fatal potential errors are guarded by "if"
1582 * statements that are entered only when no error is
1583 * possible.
1584 *
1585 * If we ever encounter a non-fatal error, it means
1586 * something went really wrong and we should stop
1587 * immediately.
1588 */
1589 die(_("unknown error occurred while reading the configuration files"));
1590 }
1591
1592 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1593 {
1594 int i, value_index;
1595 struct string_list *values;
1596 struct config_set_element *entry;
1597 struct configset_list *list = &cs->list;
1598
1599 for (i = 0; i < list->nr; i++) {
1600 entry = list->items[i].e;
1601 value_index = list->items[i].value_index;
1602 values = &entry->value_list;
1603
1604 current_config_kvi = values->items[value_index].util;
1605
1606 if (fn(entry->key, values->items[value_index].string, data) < 0)
1607 git_die_config_linenr(entry->key,
1608 current_config_kvi->filename,
1609 current_config_kvi->linenr);
1610
1611 current_config_kvi = NULL;
1612 }
1613 }
1614
1615 void read_early_config(config_fn_t cb, void *data)
1616 {
1617 struct strbuf buf = STRBUF_INIT;
1618
1619 git_config_with_options(cb, data, NULL, 1);
1620
1621 /*
1622 * When setup_git_directory() was not yet asked to discover the
1623 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1624 * is any repository config we should use (but unlike
1625 * setup_git_directory_gently(), no global state is changed, most
1626 * notably, the current working directory is still the same after the
1627 * call).
1628 */
1629 if (!have_git_dir() && discover_git_directory(&buf)) {
1630 struct git_config_source repo_config;
1631
1632 memset(&repo_config, 0, sizeof(repo_config));
1633 strbuf_addstr(&buf, "/config");
1634 repo_config.file = buf.buf;
1635 git_config_with_options(cb, data, &repo_config, 1);
1636 }
1637 strbuf_release(&buf);
1638 }
1639
1640 static void git_config_check_init(void);
1641
1642 void git_config(config_fn_t fn, void *data)
1643 {
1644 git_config_check_init();
1645 configset_iter(&the_config_set, fn, data);
1646 }
1647
1648 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1649 {
1650 struct config_set_element k;
1651 struct config_set_element *found_entry;
1652 char *normalized_key;
1653 /*
1654 * `key` may come from the user, so normalize it before using it
1655 * for querying entries from the hashmap.
1656 */
1657 if (git_config_parse_key(key, &normalized_key, NULL))
1658 return NULL;
1659
1660 hashmap_entry_init(&k, strhash(normalized_key));
1661 k.key = normalized_key;
1662 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1663 free(normalized_key);
1664 return found_entry;
1665 }
1666
1667 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1668 {
1669 struct config_set_element *e;
1670 struct string_list_item *si;
1671 struct configset_list_item *l_item;
1672 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1673
1674 e = configset_find_element(cs, key);
1675 /*
1676 * Since the keys are being fed by git_config*() callback mechanism, they
1677 * are already normalized. So simply add them without any further munging.
1678 */
1679 if (!e) {
1680 e = xmalloc(sizeof(*e));
1681 hashmap_entry_init(e, strhash(key));
1682 e->key = xstrdup(key);
1683 string_list_init(&e->value_list, 1);
1684 hashmap_add(&cs->config_hash, e);
1685 }
1686 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1687
1688 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1689 l_item = &cs->list.items[cs->list.nr++];
1690 l_item->e = e;
1691 l_item->value_index = e->value_list.nr - 1;
1692
1693 if (!cf)
1694 die("BUG: configset_add_value has no source");
1695 if (cf->name) {
1696 kv_info->filename = strintern(cf->name);
1697 kv_info->linenr = cf->linenr;
1698 kv_info->origin_type = cf->origin_type;
1699 } else {
1700 /* for values read from `git_config_from_parameters()` */
1701 kv_info->filename = NULL;
1702 kv_info->linenr = -1;
1703 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1704 }
1705 kv_info->scope = current_parsing_scope;
1706 si->util = kv_info;
1707
1708 return 0;
1709 }
1710
1711 static int config_set_element_cmp(const struct config_set_element *e1,
1712 const struct config_set_element *e2, const void *unused)
1713 {
1714 return strcmp(e1->key, e2->key);
1715 }
1716
1717 void git_configset_init(struct config_set *cs)
1718 {
1719 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1720 cs->hash_initialized = 1;
1721 cs->list.nr = 0;
1722 cs->list.alloc = 0;
1723 cs->list.items = NULL;
1724 }
1725
1726 void git_configset_clear(struct config_set *cs)
1727 {
1728 struct config_set_element *entry;
1729 struct hashmap_iter iter;
1730 if (!cs->hash_initialized)
1731 return;
1732
1733 hashmap_iter_init(&cs->config_hash, &iter);
1734 while ((entry = hashmap_iter_next(&iter))) {
1735 free(entry->key);
1736 string_list_clear(&entry->value_list, 1);
1737 }
1738 hashmap_free(&cs->config_hash, 1);
1739 cs->hash_initialized = 0;
1740 free(cs->list.items);
1741 cs->list.nr = 0;
1742 cs->list.alloc = 0;
1743 cs->list.items = NULL;
1744 }
1745
1746 static int config_set_callback(const char *key, const char *value, void *cb)
1747 {
1748 struct config_set *cs = cb;
1749 configset_add_value(cs, key, value);
1750 return 0;
1751 }
1752
1753 int git_configset_add_file(struct config_set *cs, const char *filename)
1754 {
1755 return git_config_from_file(config_set_callback, filename, cs);
1756 }
1757
1758 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1759 {
1760 const struct string_list *values = NULL;
1761 /*
1762 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1763 * queried key in the files of the configset, the value returned will be the last
1764 * value in the value list for that key.
1765 */
1766 values = git_configset_get_value_multi(cs, key);
1767
1768 if (!values)
1769 return 1;
1770 assert(values->nr > 0);
1771 *value = values->items[values->nr - 1].string;
1772 return 0;
1773 }
1774
1775 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1776 {
1777 struct config_set_element *e = configset_find_element(cs, key);
1778 return e ? &e->value_list : NULL;
1779 }
1780
1781 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1782 {
1783 const char *value;
1784 if (!git_configset_get_value(cs, key, &value))
1785 return git_config_string(dest, key, value);
1786 else
1787 return 1;
1788 }
1789
1790 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1791 {
1792 return git_configset_get_string_const(cs, key, (const char **)dest);
1793 }
1794
1795 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1796 {
1797 const char *value;
1798 if (!git_configset_get_value(cs, key, &value)) {
1799 *dest = git_config_int(key, value);
1800 return 0;
1801 } else
1802 return 1;
1803 }
1804
1805 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1806 {
1807 const char *value;
1808 if (!git_configset_get_value(cs, key, &value)) {
1809 *dest = git_config_ulong(key, value);
1810 return 0;
1811 } else
1812 return 1;
1813 }
1814
1815 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1816 {
1817 const char *value;
1818 if (!git_configset_get_value(cs, key, &value)) {
1819 *dest = git_config_bool(key, value);
1820 return 0;
1821 } else
1822 return 1;
1823 }
1824
1825 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1826 int *is_bool, int *dest)
1827 {
1828 const char *value;
1829 if (!git_configset_get_value(cs, key, &value)) {
1830 *dest = git_config_bool_or_int(key, value, is_bool);
1831 return 0;
1832 } else
1833 return 1;
1834 }
1835
1836 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1837 {
1838 const char *value;
1839 if (!git_configset_get_value(cs, key, &value)) {
1840 *dest = git_config_maybe_bool(key, value);
1841 if (*dest == -1)
1842 return -1;
1843 return 0;
1844 } else
1845 return 1;
1846 }
1847
1848 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1849 {
1850 const char *value;
1851 if (!git_configset_get_value(cs, key, &value))
1852 return git_config_pathname(dest, key, value);
1853 else
1854 return 1;
1855 }
1856
1857 static void git_config_check_init(void)
1858 {
1859 if (the_config_set.hash_initialized)
1860 return;
1861 git_configset_init(&the_config_set);
1862 git_config_raw(config_set_callback, &the_config_set);
1863 }
1864
1865 void git_config_clear(void)
1866 {
1867 if (!the_config_set.hash_initialized)
1868 return;
1869 git_configset_clear(&the_config_set);
1870 }
1871
1872 int git_config_get_value(const char *key, const char **value)
1873 {
1874 git_config_check_init();
1875 return git_configset_get_value(&the_config_set, key, value);
1876 }
1877
1878 const struct string_list *git_config_get_value_multi(const char *key)
1879 {
1880 git_config_check_init();
1881 return git_configset_get_value_multi(&the_config_set, key);
1882 }
1883
1884 int git_config_get_string_const(const char *key, const char **dest)
1885 {
1886 int ret;
1887 git_config_check_init();
1888 ret = git_configset_get_string_const(&the_config_set, key, dest);
1889 if (ret < 0)
1890 git_die_config(key, NULL);
1891 return ret;
1892 }
1893
1894 int git_config_get_string(const char *key, char **dest)
1895 {
1896 git_config_check_init();
1897 return git_config_get_string_const(key, (const char **)dest);
1898 }
1899
1900 int git_config_get_int(const char *key, int *dest)
1901 {
1902 git_config_check_init();
1903 return git_configset_get_int(&the_config_set, key, dest);
1904 }
1905
1906 int git_config_get_ulong(const char *key, unsigned long *dest)
1907 {
1908 git_config_check_init();
1909 return git_configset_get_ulong(&the_config_set, key, dest);
1910 }
1911
1912 int git_config_get_bool(const char *key, int *dest)
1913 {
1914 git_config_check_init();
1915 return git_configset_get_bool(&the_config_set, key, dest);
1916 }
1917
1918 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1919 {
1920 git_config_check_init();
1921 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1922 }
1923
1924 int git_config_get_maybe_bool(const char *key, int *dest)
1925 {
1926 git_config_check_init();
1927 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1928 }
1929
1930 int git_config_get_pathname(const char *key, const char **dest)
1931 {
1932 int ret;
1933 git_config_check_init();
1934 ret = git_configset_get_pathname(&the_config_set, key, dest);
1935 if (ret < 0)
1936 git_die_config(key, NULL);
1937 return ret;
1938 }
1939
1940 int git_config_get_expiry(const char *key, const char **output)
1941 {
1942 int ret = git_config_get_string_const(key, output);
1943 if (ret)
1944 return ret;
1945 if (strcmp(*output, "now")) {
1946 unsigned long now = approxidate("now");
1947 if (approxidate(*output) >= now)
1948 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
1949 }
1950 return ret;
1951 }
1952
1953 int git_config_get_untracked_cache(void)
1954 {
1955 int val = -1;
1956 const char *v;
1957
1958 /* Hack for test programs like test-dump-untracked-cache */
1959 if (ignore_untracked_cache_config)
1960 return -1;
1961
1962 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1963 return val;
1964
1965 if (!git_config_get_value("core.untrackedcache", &v)) {
1966 if (!strcasecmp(v, "keep"))
1967 return -1;
1968
1969 error(_("unknown core.untrackedCache value '%s'; "
1970 "using 'keep' default value"), v);
1971 return -1;
1972 }
1973
1974 return -1; /* default value */
1975 }
1976
1977 int git_config_get_split_index(void)
1978 {
1979 int val;
1980
1981 if (!git_config_get_maybe_bool("core.splitindex", &val))
1982 return val;
1983
1984 return -1; /* default value */
1985 }
1986
1987 int git_config_get_max_percent_split_change(void)
1988 {
1989 int val = -1;
1990
1991 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
1992 if (0 <= val && val <= 100)
1993 return val;
1994
1995 return error(_("splitIndex.maxPercentChange value '%d' "
1996 "should be between 0 and 100"), val);
1997 }
1998
1999 return -1; /* default value */
2000 }
2001
2002 NORETURN
2003 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2004 {
2005 if (!filename)
2006 die(_("unable to parse '%s' from command-line config"), key);
2007 else
2008 die(_("bad config variable '%s' in file '%s' at line %d"),
2009 key, filename, linenr);
2010 }
2011
2012 NORETURN __attribute__((format(printf, 2, 3)))
2013 void git_die_config(const char *key, const char *err, ...)
2014 {
2015 const struct string_list *values;
2016 struct key_value_info *kv_info;
2017
2018 if (err) {
2019 va_list params;
2020 va_start(params, err);
2021 vreportf("error: ", err, params);
2022 va_end(params);
2023 }
2024 values = git_config_get_value_multi(key);
2025 kv_info = values->items[values->nr - 1].util;
2026 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2027 }
2028
2029 /*
2030 * Find all the stuff for git_config_set() below.
2031 */
2032
2033 static struct {
2034 int baselen;
2035 char *key;
2036 int do_not_match;
2037 regex_t *value_regex;
2038 int multi_replace;
2039 size_t *offset;
2040 unsigned int offset_alloc;
2041 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2042 int seen;
2043 } store;
2044
2045 static int matches(const char *key, const char *value)
2046 {
2047 if (strcmp(key, store.key))
2048 return 0; /* not ours */
2049 if (!store.value_regex)
2050 return 1; /* always matches */
2051 if (store.value_regex == CONFIG_REGEX_NONE)
2052 return 0; /* never matches */
2053
2054 return store.do_not_match ^
2055 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2056 }
2057
2058 static int store_aux(const char *key, const char *value, void *cb)
2059 {
2060 const char *ep;
2061 size_t section_len;
2062
2063 switch (store.state) {
2064 case KEY_SEEN:
2065 if (matches(key, value)) {
2066 if (store.seen == 1 && store.multi_replace == 0) {
2067 warning(_("%s has multiple values"), key);
2068 }
2069
2070 ALLOC_GROW(store.offset, store.seen + 1,
2071 store.offset_alloc);
2072
2073 store.offset[store.seen] = cf->do_ftell(cf);
2074 store.seen++;
2075 }
2076 break;
2077 case SECTION_SEEN:
2078 /*
2079 * What we are looking for is in store.key (both
2080 * section and var), and its section part is baselen
2081 * long. We found key (again, both section and var).
2082 * We would want to know if this key is in the same
2083 * section as what we are looking for. We already
2084 * know we are in the same section as what should
2085 * hold store.key.
2086 */
2087 ep = strrchr(key, '.');
2088 section_len = ep - key;
2089
2090 if ((section_len != store.baselen) ||
2091 memcmp(key, store.key, section_len+1)) {
2092 store.state = SECTION_END_SEEN;
2093 break;
2094 }
2095
2096 /*
2097 * Do not increment matches: this is no match, but we
2098 * just made sure we are in the desired section.
2099 */
2100 ALLOC_GROW(store.offset, store.seen + 1,
2101 store.offset_alloc);
2102 store.offset[store.seen] = cf->do_ftell(cf);
2103 /* fallthru */
2104 case SECTION_END_SEEN:
2105 case START:
2106 if (matches(key, value)) {
2107 ALLOC_GROW(store.offset, store.seen + 1,
2108 store.offset_alloc);
2109 store.offset[store.seen] = cf->do_ftell(cf);
2110 store.state = KEY_SEEN;
2111 store.seen++;
2112 } else {
2113 if (strrchr(key, '.') - key == store.baselen &&
2114 !strncmp(key, store.key, store.baselen)) {
2115 store.state = SECTION_SEEN;
2116 ALLOC_GROW(store.offset,
2117 store.seen + 1,
2118 store.offset_alloc);
2119 store.offset[store.seen] = cf->do_ftell(cf);
2120 }
2121 }
2122 }
2123 return 0;
2124 }
2125
2126 static int write_error(const char *filename)
2127 {
2128 error("failed to write new configuration file %s", filename);
2129
2130 /* Same error code as "failed to rename". */
2131 return 4;
2132 }
2133
2134 static int store_write_section(int fd, const char *key)
2135 {
2136 const char *dot;
2137 int i, success;
2138 struct strbuf sb = STRBUF_INIT;
2139
2140 dot = memchr(key, '.', store.baselen);
2141 if (dot) {
2142 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2143 for (i = dot - key + 1; i < store.baselen; i++) {
2144 if (key[i] == '"' || key[i] == '\\')
2145 strbuf_addch(&sb, '\\');
2146 strbuf_addch(&sb, key[i]);
2147 }
2148 strbuf_addstr(&sb, "\"]\n");
2149 } else {
2150 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2151 }
2152
2153 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2154 strbuf_release(&sb);
2155
2156 return success;
2157 }
2158
2159 static int store_write_pair(int fd, const char *key, const char *value)
2160 {
2161 int i, success;
2162 int length = strlen(key + store.baselen + 1);
2163 const char *quote = "";
2164 struct strbuf sb = STRBUF_INIT;
2165
2166 /*
2167 * Check to see if the value needs to be surrounded with a dq pair.
2168 * Note that problematic characters are always backslash-quoted; this
2169 * check is about not losing leading or trailing SP and strings that
2170 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2171 * configuration parser.
2172 */
2173 if (value[0] == ' ')
2174 quote = "\"";
2175 for (i = 0; value[i]; i++)
2176 if (value[i] == ';' || value[i] == '#')
2177 quote = "\"";
2178 if (i && value[i - 1] == ' ')
2179 quote = "\"";
2180
2181 strbuf_addf(&sb, "\t%.*s = %s",
2182 length, key + store.baselen + 1, quote);
2183
2184 for (i = 0; value[i]; i++)
2185 switch (value[i]) {
2186 case '\n':
2187 strbuf_addstr(&sb, "\\n");
2188 break;
2189 case '\t':
2190 strbuf_addstr(&sb, "\\t");
2191 break;
2192 case '"':
2193 case '\\':
2194 strbuf_addch(&sb, '\\');
2195 default:
2196 strbuf_addch(&sb, value[i]);
2197 break;
2198 }
2199 strbuf_addf(&sb, "%s\n", quote);
2200
2201 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2202 strbuf_release(&sb);
2203
2204 return success;
2205 }
2206
2207 static ssize_t find_beginning_of_line(const char *contents, size_t size,
2208 size_t offset_, int *found_bracket)
2209 {
2210 size_t equal_offset = size, bracket_offset = size;
2211 ssize_t offset;
2212
2213 contline:
2214 for (offset = offset_-2; offset > 0
2215 && contents[offset] != '\n'; offset--)
2216 switch (contents[offset]) {
2217 case '=': equal_offset = offset; break;
2218 case ']': bracket_offset = offset; break;
2219 }
2220 if (offset > 0 && contents[offset-1] == '\\') {
2221 offset_ = offset;
2222 goto contline;
2223 }
2224 if (bracket_offset < equal_offset) {
2225 *found_bracket = 1;
2226 offset = bracket_offset+1;
2227 } else
2228 offset++;
2229
2230 return offset;
2231 }
2232
2233 int git_config_set_in_file_gently(const char *config_filename,
2234 const char *key, const char *value)
2235 {
2236 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2237 }
2238
2239 void git_config_set_in_file(const char *config_filename,
2240 const char *key, const char *value)
2241 {
2242 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2243 }
2244
2245 int git_config_set_gently(const char *key, const char *value)
2246 {
2247 return git_config_set_multivar_gently(key, value, NULL, 0);
2248 }
2249
2250 void git_config_set(const char *key, const char *value)
2251 {
2252 git_config_set_multivar(key, value, NULL, 0);
2253 }
2254
2255 /*
2256 * If value==NULL, unset in (remove from) config,
2257 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2258 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2259 * (only add a new one)
2260 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2261 * else all matching key/values (regardless how many) are removed,
2262 * before the new pair is written.
2263 *
2264 * Returns 0 on success.
2265 *
2266 * This function does this:
2267 *
2268 * - it locks the config file by creating ".git/config.lock"
2269 *
2270 * - it then parses the config using store_aux() as validator to find
2271 * the position on the key/value pair to replace. If it is to be unset,
2272 * it must be found exactly once.
2273 *
2274 * - the config file is mmap()ed and the part before the match (if any) is
2275 * written to the lock file, then the changed part and the rest.
2276 *
2277 * - the config file is removed and the lock file rename()d to it.
2278 *
2279 */
2280 int git_config_set_multivar_in_file_gently(const char *config_filename,
2281 const char *key, const char *value,
2282 const char *value_regex,
2283 int multi_replace)
2284 {
2285 int fd = -1, in_fd = -1;
2286 int ret;
2287 struct lock_file *lock = NULL;
2288 char *filename_buf = NULL;
2289 char *contents = NULL;
2290 size_t contents_sz;
2291
2292 /* parse-key returns negative; flip the sign to feed exit(3) */
2293 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2294 if (ret)
2295 goto out_free;
2296
2297 store.multi_replace = multi_replace;
2298
2299 if (!config_filename)
2300 config_filename = filename_buf = git_pathdup("config");
2301
2302 /*
2303 * The lock serves a purpose in addition to locking: the new
2304 * contents of .git/config will be written into it.
2305 */
2306 lock = xcalloc(1, sizeof(struct lock_file));
2307 fd = hold_lock_file_for_update(lock, config_filename, 0);
2308 if (fd < 0) {
2309 error_errno("could not lock config file %s", config_filename);
2310 free(store.key);
2311 ret = CONFIG_NO_LOCK;
2312 goto out_free;
2313 }
2314
2315 /*
2316 * If .git/config does not exist yet, write a minimal version.
2317 */
2318 in_fd = open(config_filename, O_RDONLY);
2319 if ( in_fd < 0 ) {
2320 free(store.key);
2321
2322 if ( ENOENT != errno ) {
2323 error_errno("opening %s", config_filename);
2324 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2325 goto out_free;
2326 }
2327 /* if nothing to unset, error out */
2328 if (value == NULL) {
2329 ret = CONFIG_NOTHING_SET;
2330 goto out_free;
2331 }
2332
2333 store.key = (char *)key;
2334 if (!store_write_section(fd, key) ||
2335 !store_write_pair(fd, key, value))
2336 goto write_err_out;
2337 } else {
2338 struct stat st;
2339 size_t copy_begin, copy_end;
2340 int i, new_line = 0;
2341
2342 if (value_regex == NULL)
2343 store.value_regex = NULL;
2344 else if (value_regex == CONFIG_REGEX_NONE)
2345 store.value_regex = CONFIG_REGEX_NONE;
2346 else {
2347 if (value_regex[0] == '!') {
2348 store.do_not_match = 1;
2349 value_regex++;
2350 } else
2351 store.do_not_match = 0;
2352
2353 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2354 if (regcomp(store.value_regex, value_regex,
2355 REG_EXTENDED)) {
2356 error("invalid pattern: %s", value_regex);
2357 free(store.value_regex);
2358 ret = CONFIG_INVALID_PATTERN;
2359 goto out_free;
2360 }
2361 }
2362
2363 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2364 store.offset[0] = 0;
2365 store.state = START;
2366 store.seen = 0;
2367
2368 /*
2369 * After this, store.offset will contain the *end* offset
2370 * of the last match, or remain at 0 if no match was found.
2371 * As a side effect, we make sure to transform only a valid
2372 * existing config file.
2373 */
2374 if (git_config_from_file(store_aux, config_filename, NULL)) {
2375 error("invalid config file %s", config_filename);
2376 free(store.key);
2377 if (store.value_regex != NULL &&
2378 store.value_regex != CONFIG_REGEX_NONE) {
2379 regfree(store.value_regex);
2380 free(store.value_regex);
2381 }
2382 ret = CONFIG_INVALID_FILE;
2383 goto out_free;
2384 }
2385
2386 free(store.key);
2387 if (store.value_regex != NULL &&
2388 store.value_regex != CONFIG_REGEX_NONE) {
2389 regfree(store.value_regex);
2390 free(store.value_regex);
2391 }
2392
2393 /* if nothing to unset, or too many matches, error out */
2394 if ((store.seen == 0 && value == NULL) ||
2395 (store.seen > 1 && multi_replace == 0)) {
2396 ret = CONFIG_NOTHING_SET;
2397 goto out_free;
2398 }
2399
2400 if (fstat(in_fd, &st) == -1) {
2401 error_errno(_("fstat on %s failed"), config_filename);
2402 ret = CONFIG_INVALID_FILE;
2403 goto out_free;
2404 }
2405
2406 contents_sz = xsize_t(st.st_size);
2407 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2408 MAP_PRIVATE, in_fd, 0);
2409 if (contents == MAP_FAILED) {
2410 if (errno == ENODEV && S_ISDIR(st.st_mode))
2411 errno = EISDIR;
2412 error_errno("unable to mmap '%s'", config_filename);
2413 ret = CONFIG_INVALID_FILE;
2414 contents = NULL;
2415 goto out_free;
2416 }
2417 close(in_fd);
2418 in_fd = -1;
2419
2420 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2421 error_errno("chmod on %s failed", get_lock_file_path(lock));
2422 ret = CONFIG_NO_WRITE;
2423 goto out_free;
2424 }
2425
2426 if (store.seen == 0)
2427 store.seen = 1;
2428
2429 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2430 if (store.offset[i] == 0) {
2431 store.offset[i] = copy_end = contents_sz;
2432 } else if (store.state != KEY_SEEN) {
2433 copy_end = store.offset[i];
2434 } else
2435 copy_end = find_beginning_of_line(
2436 contents, contents_sz,
2437 store.offset[i]-2, &new_line);
2438
2439 if (copy_end > 0 && contents[copy_end-1] != '\n')
2440 new_line = 1;
2441
2442 /* write the first part of the config */
2443 if (copy_end > copy_begin) {
2444 if (write_in_full(fd, contents + copy_begin,
2445 copy_end - copy_begin) <
2446 copy_end - copy_begin)
2447 goto write_err_out;
2448 if (new_line &&
2449 write_str_in_full(fd, "\n") != 1)
2450 goto write_err_out;
2451 }
2452 copy_begin = store.offset[i];
2453 }
2454
2455 /* write the pair (value == NULL means unset) */
2456 if (value != NULL) {
2457 if (store.state == START) {
2458 if (!store_write_section(fd, key))
2459 goto write_err_out;
2460 }
2461 if (!store_write_pair(fd, key, value))
2462 goto write_err_out;
2463 }
2464
2465 /* write the rest of the config */
2466 if (copy_begin < contents_sz)
2467 if (write_in_full(fd, contents + copy_begin,
2468 contents_sz - copy_begin) <
2469 contents_sz - copy_begin)
2470 goto write_err_out;
2471
2472 munmap(contents, contents_sz);
2473 contents = NULL;
2474 }
2475
2476 if (commit_lock_file(lock) < 0) {
2477 error_errno("could not write config file %s", config_filename);
2478 ret = CONFIG_NO_WRITE;
2479 lock = NULL;
2480 goto out_free;
2481 }
2482
2483 /*
2484 * lock is committed, so don't try to roll it back below.
2485 * NOTE: Since lockfile.c keeps a linked list of all created
2486 * lock_file structures, it isn't safe to free(lock). It's
2487 * better to just leave it hanging around.
2488 */
2489 lock = NULL;
2490 ret = 0;
2491
2492 /* Invalidate the config cache */
2493 git_config_clear();
2494
2495 out_free:
2496 if (lock)
2497 rollback_lock_file(lock);
2498 free(filename_buf);
2499 if (contents)
2500 munmap(contents, contents_sz);
2501 if (in_fd >= 0)
2502 close(in_fd);
2503 return ret;
2504
2505 write_err_out:
2506 ret = write_error(get_lock_file_path(lock));
2507 goto out_free;
2508
2509 }
2510
2511 void git_config_set_multivar_in_file(const char *config_filename,
2512 const char *key, const char *value,
2513 const char *value_regex, int multi_replace)
2514 {
2515 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2516 value_regex, multi_replace))
2517 return;
2518 if (value)
2519 die(_("could not set '%s' to '%s'"), key, value);
2520 else
2521 die(_("could not unset '%s'"), key);
2522 }
2523
2524 int git_config_set_multivar_gently(const char *key, const char *value,
2525 const char *value_regex, int multi_replace)
2526 {
2527 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2528 multi_replace);
2529 }
2530
2531 void git_config_set_multivar(const char *key, const char *value,
2532 const char *value_regex, int multi_replace)
2533 {
2534 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2535 multi_replace);
2536 }
2537
2538 static int section_name_match (const char *buf, const char *name)
2539 {
2540 int i = 0, j = 0, dot = 0;
2541 if (buf[i] != '[')
2542 return 0;
2543 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2544 if (!dot && isspace(buf[i])) {
2545 dot = 1;
2546 if (name[j++] != '.')
2547 break;
2548 for (i++; isspace(buf[i]); i++)
2549 ; /* do nothing */
2550 if (buf[i] != '"')
2551 break;
2552 continue;
2553 }
2554 if (buf[i] == '\\' && dot)
2555 i++;
2556 else if (buf[i] == '"' && dot) {
2557 for (i++; isspace(buf[i]); i++)
2558 ; /* do_nothing */
2559 break;
2560 }
2561 if (buf[i] != name[j++])
2562 break;
2563 }
2564 if (buf[i] == ']' && name[j] == 0) {
2565 /*
2566 * We match, now just find the right length offset by
2567 * gobbling up any whitespace after it, as well
2568 */
2569 i++;
2570 for (; buf[i] && isspace(buf[i]); i++)
2571 ; /* do nothing */
2572 return i;
2573 }
2574 return 0;
2575 }
2576
2577 static int section_name_is_ok(const char *name)
2578 {
2579 /* Empty section names are bogus. */
2580 if (!*name)
2581 return 0;
2582
2583 /*
2584 * Before a dot, we must be alphanumeric or dash. After the first dot,
2585 * anything goes, so we can stop checking.
2586 */
2587 for (; *name && *name != '.'; name++)
2588 if (*name != '-' && !isalnum(*name))
2589 return 0;
2590 return 1;
2591 }
2592
2593 /* if new_name == NULL, the section is removed instead */
2594 int git_config_rename_section_in_file(const char *config_filename,
2595 const char *old_name, const char *new_name)
2596 {
2597 int ret = 0, remove = 0;
2598 char *filename_buf = NULL;
2599 struct lock_file *lock;
2600 int out_fd;
2601 char buf[1024];
2602 FILE *config_file;
2603 struct stat st;
2604
2605 if (new_name && !section_name_is_ok(new_name)) {
2606 ret = error("invalid section name: %s", new_name);
2607 goto out_no_rollback;
2608 }
2609
2610 if (!config_filename)
2611 config_filename = filename_buf = git_pathdup("config");
2612
2613 lock = xcalloc(1, sizeof(struct lock_file));
2614 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2615 if (out_fd < 0) {
2616 ret = error("could not lock config file %s", config_filename);
2617 goto out;
2618 }
2619
2620 if (!(config_file = fopen(config_filename, "rb"))) {
2621 /* no config file means nothing to rename, no error */
2622 goto commit_and_out;
2623 }
2624
2625 if (fstat(fileno(config_file), &st) == -1) {
2626 ret = error_errno(_("fstat on %s failed"), config_filename);
2627 goto out;
2628 }
2629
2630 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2631 ret = error_errno("chmod on %s failed",
2632 get_lock_file_path(lock));
2633 goto out;
2634 }
2635
2636 while (fgets(buf, sizeof(buf), config_file)) {
2637 int i;
2638 int length;
2639 char *output = buf;
2640 for (i = 0; buf[i] && isspace(buf[i]); i++)
2641 ; /* do nothing */
2642 if (buf[i] == '[') {
2643 /* it's a section */
2644 int offset = section_name_match(&buf[i], old_name);
2645 if (offset > 0) {
2646 ret++;
2647 if (new_name == NULL) {
2648 remove = 1;
2649 continue;
2650 }
2651 store.baselen = strlen(new_name);
2652 if (!store_write_section(out_fd, new_name)) {
2653 ret = write_error(get_lock_file_path(lock));
2654 goto out;
2655 }
2656 /*
2657 * We wrote out the new section, with
2658 * a newline, now skip the old
2659 * section's length
2660 */
2661 output += offset + i;
2662 if (strlen(output) > 0) {
2663 /*
2664 * More content means there's
2665 * a declaration to put on the
2666 * next line; indent with a
2667 * tab
2668 */
2669 output -= 1;
2670 output[0] = '\t';
2671 }
2672 }
2673 remove = 0;
2674 }
2675 if (remove)
2676 continue;
2677 length = strlen(output);
2678 if (write_in_full(out_fd, output, length) != length) {
2679 ret = write_error(get_lock_file_path(lock));
2680 goto out;
2681 }
2682 }
2683 fclose(config_file);
2684 commit_and_out:
2685 if (commit_lock_file(lock) < 0)
2686 ret = error_errno("could not write config file %s",
2687 config_filename);
2688 out:
2689 rollback_lock_file(lock);
2690 out_no_rollback:
2691 free(filename_buf);
2692 return ret;
2693 }
2694
2695 int git_config_rename_section(const char *old_name, const char *new_name)
2696 {
2697 return git_config_rename_section_in_file(NULL, old_name, new_name);
2698 }
2699
2700 /*
2701 * Call this to report error for your variable that should not
2702 * get a boolean value (i.e. "[my] var" means "true").
2703 */
2704 #undef config_error_nonbool
2705 int config_error_nonbool(const char *var)
2706 {
2707 return error("missing value for '%s'", var);
2708 }
2709
2710 int parse_config_key(const char *var,
2711 const char *section,
2712 const char **subsection, int *subsection_len,
2713 const char **key)
2714 {
2715 const char *dot;
2716
2717 /* Does it start with "section." ? */
2718 if (!skip_prefix(var, section, &var) || *var != '.')
2719 return -1;
2720
2721 /*
2722 * Find the key; we don't know yet if we have a subsection, but we must
2723 * parse backwards from the end, since the subsection may have dots in
2724 * it, too.
2725 */
2726 dot = strrchr(var, '.');
2727 *key = dot + 1;
2728
2729 /* Did we have a subsection at all? */
2730 if (dot == var) {
2731 if (subsection) {
2732 *subsection = NULL;
2733 *subsection_len = 0;
2734 }
2735 }
2736 else {
2737 if (!subsection)
2738 return -1;
2739 *subsection = var + 1;
2740 *subsection_len = dot - *subsection;
2741 }
2742
2743 return 0;
2744 }
2745
2746 const char *current_config_origin_type(void)
2747 {
2748 int type;
2749 if (current_config_kvi)
2750 type = current_config_kvi->origin_type;
2751 else if(cf)
2752 type = cf->origin_type;
2753 else
2754 die("BUG: current_config_origin_type called outside config callback");
2755
2756 switch (type) {
2757 case CONFIG_ORIGIN_BLOB:
2758 return "blob";
2759 case CONFIG_ORIGIN_FILE:
2760 return "file";
2761 case CONFIG_ORIGIN_STDIN:
2762 return "standard input";
2763 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2764 return "submodule-blob";
2765 case CONFIG_ORIGIN_CMDLINE:
2766 return "command line";
2767 default:
2768 die("BUG: unknown config origin type");
2769 }
2770 }
2771
2772 const char *current_config_name(void)
2773 {
2774 const char *name;
2775 if (current_config_kvi)
2776 name = current_config_kvi->filename;
2777 else if (cf)
2778 name = cf->name;
2779 else
2780 die("BUG: current_config_name called outside config callback");
2781 return name ? name : "";
2782 }
2783
2784 enum config_scope current_config_scope(void)
2785 {
2786 if (current_config_kvi)
2787 return current_config_kvi->scope;
2788 else
2789 return current_parsing_scope;
2790 }