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 "config.h"
10#include "repository.h"
11#include "lockfile.h"
12#include "exec_cmd.h"
13#include "strbuf.h"
14#include "quote.h"
15#include "hashmap.h"
16#include "string-list.h"
17#include "utf8.h"
18#include "dir.h"
19
20struct config_source {
21 struct config_source *prev;
22 union {
23 FILE *file;
24 struct config_buf {
25 const char *buf;
26 size_t len;
27 size_t pos;
28 } buf;
29 } u;
30 enum config_origin_type origin_type;
31 const char *name;
32 const char *path;
33 int die_on_error;
34 int linenr;
35 int eof;
36 struct strbuf value;
37 struct strbuf var;
38
39 int (*do_fgetc)(struct config_source *c);
40 int (*do_ungetc)(int c, struct config_source *conf);
41 long (*do_ftell)(struct config_source *c);
42};
43
44/*
45 * These variables record the "current" config source, which
46 * can be accessed by parsing callbacks.
47 *
48 * The "cf" variable will be non-NULL only when we are actually parsing a real
49 * config source (file, blob, cmdline, etc).
50 *
51 * The "current_config_kvi" variable will be non-NULL only when we are feeding
52 * cached config from a configset into a callback.
53 *
54 * They should generally never be non-NULL at the same time. If they are both
55 * NULL, then we aren't parsing anything (and depending on the function looking
56 * at the variables, it's either a bug for it to be called in the first place,
57 * or it's a function which can be reused for non-config purposes, and should
58 * fall back to some sane behavior).
59 */
60static struct config_source *cf;
61static struct key_value_info *current_config_kvi;
62
63/*
64 * Similar to the variables above, this gives access to the "scope" of the
65 * current value (repo, global, etc). For cached values, it can be found via
66 * the current_config_kvi as above. During parsing, the current value can be
67 * found in this variable. It's not part of "cf" because it transcends a single
68 * file (i.e., a file included from .git/config is still in "repo" scope).
69 */
70static enum config_scope current_parsing_scope;
71
72static int core_compression_seen;
73static int pack_compression_seen;
74static int zlib_compression_seen;
75
76static int config_file_fgetc(struct config_source *conf)
77{
78 return getc_unlocked(conf->u.file);
79}
80
81static int config_file_ungetc(int c, struct config_source *conf)
82{
83 return ungetc(c, conf->u.file);
84}
85
86static long config_file_ftell(struct config_source *conf)
87{
88 return ftell(conf->u.file);
89}
90
91
92static int config_buf_fgetc(struct config_source *conf)
93{
94 if (conf->u.buf.pos < conf->u.buf.len)
95 return conf->u.buf.buf[conf->u.buf.pos++];
96
97 return EOF;
98}
99
100static int config_buf_ungetc(int c, struct config_source *conf)
101{
102 if (conf->u.buf.pos > 0) {
103 conf->u.buf.pos--;
104 if (conf->u.buf.buf[conf->u.buf.pos] != c)
105 die("BUG: config_buf can only ungetc the same character");
106 return c;
107 }
108
109 return EOF;
110}
111
112static long config_buf_ftell(struct config_source *conf)
113{
114 return conf->u.buf.pos;
115}
116
117#define MAX_INCLUDE_DEPTH 10
118static const char include_depth_advice[] =
119"exceeded maximum include depth (%d) while including\n"
120" %s\n"
121"from\n"
122" %s\n"
123"Do you have circular includes?";
124static int handle_path_include(const char *path, struct config_include_data *inc)
125{
126 int ret = 0;
127 struct strbuf buf = STRBUF_INIT;
128 char *expanded;
129
130 if (!path)
131 return config_error_nonbool("include.path");
132
133 expanded = expand_user_path(path, 0);
134 if (!expanded)
135 return error("could not expand include path '%s'", path);
136 path = expanded;
137
138 /*
139 * Use an absolute path as-is, but interpret relative paths
140 * based on the including config file.
141 */
142 if (!is_absolute_path(path)) {
143 char *slash;
144
145 if (!cf || !cf->path)
146 return error("relative config includes must come from files");
147
148 slash = find_last_dir_sep(cf->path);
149 if (slash)
150 strbuf_add(&buf, cf->path, slash - cf->path + 1);
151 strbuf_addstr(&buf, path);
152 path = buf.buf;
153 }
154
155 if (!access_or_die(path, R_OK, 0)) {
156 if (++inc->depth > MAX_INCLUDE_DEPTH)
157 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
158 !cf ? "<unknown>" :
159 cf->name ? cf->name :
160 "the command line");
161 ret = git_config_from_file(git_config_include, path, inc);
162 inc->depth--;
163 }
164 strbuf_release(&buf);
165 free(expanded);
166 return ret;
167}
168
169static int prepare_include_condition_pattern(struct strbuf *pat)
170{
171 struct strbuf path = STRBUF_INIT;
172 char *expanded;
173 int prefix = 0;
174
175 expanded = expand_user_path(pat->buf, 1);
176 if (expanded) {
177 strbuf_reset(pat);
178 strbuf_addstr(pat, expanded);
179 free(expanded);
180 }
181
182 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
183 const char *slash;
184
185 if (!cf || !cf->path)
186 return error(_("relative config include "
187 "conditionals must come from files"));
188
189 strbuf_realpath(&path, cf->path, 1);
190 slash = find_last_dir_sep(path.buf);
191 if (!slash)
192 die("BUG: how is this possible?");
193 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
194 prefix = slash - path.buf + 1 /* slash */;
195 } else if (!is_absolute_path(pat->buf))
196 strbuf_insert(pat, 0, "**/", 3);
197
198 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
199 strbuf_addstr(pat, "**");
200
201 strbuf_release(&path);
202 return prefix;
203}
204
205static int include_by_gitdir(const struct config_options *opts,
206 const char *cond, size_t cond_len, int icase)
207{
208 struct strbuf text = STRBUF_INIT;
209 struct strbuf pattern = STRBUF_INIT;
210 int ret = 0, prefix;
211 const char *git_dir;
212 int already_tried_absolute = 0;
213
214 if (opts->git_dir)
215 git_dir = opts->git_dir;
216 else
217 goto done;
218
219 strbuf_realpath(&text, git_dir, 1);
220 strbuf_add(&pattern, cond, cond_len);
221 prefix = prepare_include_condition_pattern(&pattern);
222
223again:
224 if (prefix < 0)
225 goto done;
226
227 if (prefix > 0) {
228 /*
229 * perform literal matching on the prefix part so that
230 * any wildcard character in it can't create side effects.
231 */
232 if (text.len < prefix)
233 goto done;
234 if (!icase && strncmp(pattern.buf, text.buf, prefix))
235 goto done;
236 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
237 goto done;
238 }
239
240 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
241 icase ? WM_CASEFOLD : 0);
242
243 if (!ret && !already_tried_absolute) {
244 /*
245 * We've tried e.g. matching gitdir:~/work, but if
246 * ~/work is a symlink to /mnt/storage/work
247 * strbuf_realpath() will expand it, so the rule won't
248 * match. Let's match against a
249 * strbuf_add_absolute_path() version of the path,
250 * which'll do the right thing
251 */
252 strbuf_reset(&text);
253 strbuf_add_absolute_path(&text, git_dir);
254 already_tried_absolute = 1;
255 goto again;
256 }
257done:
258 strbuf_release(&pattern);
259 strbuf_release(&text);
260 return ret;
261}
262
263static int include_condition_is_true(const struct config_options *opts,
264 const char *cond, size_t cond_len)
265{
266
267 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
268 return include_by_gitdir(opts, cond, cond_len, 0);
269 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
270 return include_by_gitdir(opts, cond, cond_len, 1);
271
272 /* unknown conditionals are always false */
273 return 0;
274}
275
276int git_config_include(const char *var, const char *value, void *data)
277{
278 struct config_include_data *inc = data;
279 const char *cond, *key;
280 int cond_len;
281 int ret;
282
283 /*
284 * Pass along all values, including "include" directives; this makes it
285 * possible to query information on the includes themselves.
286 */
287 ret = inc->fn(var, value, inc->data);
288 if (ret < 0)
289 return ret;
290
291 if (!strcmp(var, "include.path"))
292 ret = handle_path_include(value, inc);
293
294 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
295 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
296 !strcmp(key, "path"))
297 ret = handle_path_include(value, inc);
298
299 return ret;
300}
301
302void git_config_push_parameter(const char *text)
303{
304 struct strbuf env = STRBUF_INIT;
305 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
306 if (old && *old) {
307 strbuf_addstr(&env, old);
308 strbuf_addch(&env, ' ');
309 }
310 sq_quote_buf(&env, text);
311 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
312 strbuf_release(&env);
313}
314
315static inline int iskeychar(int c)
316{
317 return isalnum(c) || c == '-';
318}
319
320/*
321 * Auxiliary function to sanity-check and split the key into the section
322 * identifier and variable name.
323 *
324 * Returns 0 on success, -1 when there is an invalid character in the key and
325 * -2 if there is no section name in the key.
326 *
327 * store_key - pointer to char* which will hold a copy of the key with
328 * lowercase section and variable name
329 * baselen - pointer to int which will hold the length of the
330 * section + subsection part, can be NULL
331 */
332static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
333{
334 int i, dot, baselen;
335 const char *last_dot = strrchr(key, '.');
336
337 /*
338 * Since "key" actually contains the section name and the real
339 * key name separated by a dot, we have to know where the dot is.
340 */
341
342 if (last_dot == NULL || last_dot == key) {
343 if (!quiet)
344 error("key does not contain a section: %s", key);
345 return -CONFIG_NO_SECTION_OR_NAME;
346 }
347
348 if (!last_dot[1]) {
349 if (!quiet)
350 error("key does not contain variable name: %s", key);
351 return -CONFIG_NO_SECTION_OR_NAME;
352 }
353
354 baselen = last_dot - key;
355 if (baselen_)
356 *baselen_ = baselen;
357
358 /*
359 * Validate the key and while at it, lower case it for matching.
360 */
361 if (store_key)
362 *store_key = xmallocz(strlen(key));
363
364 dot = 0;
365 for (i = 0; key[i]; i++) {
366 unsigned char c = key[i];
367 if (c == '.')
368 dot = 1;
369 /* Leave the extended basename untouched.. */
370 if (!dot || i > baselen) {
371 if (!iskeychar(c) ||
372 (i == baselen + 1 && !isalpha(c))) {
373 if (!quiet)
374 error("invalid key: %s", key);
375 goto out_free_ret_1;
376 }
377 c = tolower(c);
378 } else if (c == '\n') {
379 if (!quiet)
380 error("invalid key (newline): %s", key);
381 goto out_free_ret_1;
382 }
383 if (store_key)
384 (*store_key)[i] = c;
385 }
386
387 return 0;
388
389out_free_ret_1:
390 if (store_key) {
391 FREE_AND_NULL(*store_key);
392 }
393 return -CONFIG_INVALID_KEY;
394}
395
396int git_config_parse_key(const char *key, char **store_key, int *baselen)
397{
398 return git_config_parse_key_1(key, store_key, baselen, 0);
399}
400
401int git_config_key_is_valid(const char *key)
402{
403 return !git_config_parse_key_1(key, NULL, NULL, 1);
404}
405
406int git_config_parse_parameter(const char *text,
407 config_fn_t fn, void *data)
408{
409 const char *value;
410 char *canonical_name;
411 struct strbuf **pair;
412 int ret;
413
414 pair = strbuf_split_str(text, '=', 2);
415 if (!pair[0])
416 return error("bogus config parameter: %s", text);
417
418 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
419 strbuf_setlen(pair[0], pair[0]->len - 1);
420 value = pair[1] ? pair[1]->buf : "";
421 } else {
422 value = NULL;
423 }
424
425 strbuf_trim(pair[0]);
426 if (!pair[0]->len) {
427 strbuf_list_free(pair);
428 return error("bogus config parameter: %s", text);
429 }
430
431 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
432 ret = -1;
433 } else {
434 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
435 free(canonical_name);
436 }
437 strbuf_list_free(pair);
438 return ret;
439}
440
441int git_config_from_parameters(config_fn_t fn, void *data)
442{
443 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
444 int ret = 0;
445 char *envw;
446 const char **argv = NULL;
447 int nr = 0, alloc = 0;
448 int i;
449 struct config_source source;
450
451 if (!env)
452 return 0;
453
454 memset(&source, 0, sizeof(source));
455 source.prev = cf;
456 source.origin_type = CONFIG_ORIGIN_CMDLINE;
457 cf = &source;
458
459 /* sq_dequote will write over it */
460 envw = xstrdup(env);
461
462 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
463 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
464 goto out;
465 }
466
467 for (i = 0; i < nr; i++) {
468 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
469 ret = -1;
470 goto out;
471 }
472 }
473
474out:
475 free(argv);
476 free(envw);
477 cf = source.prev;
478 return ret;
479}
480
481static int get_next_char(void)
482{
483 int c = cf->do_fgetc(cf);
484
485 if (c == '\r') {
486 /* DOS like systems */
487 c = cf->do_fgetc(cf);
488 if (c != '\n') {
489 if (c != EOF)
490 cf->do_ungetc(c, cf);
491 c = '\r';
492 }
493 }
494 if (c == '\n')
495 cf->linenr++;
496 if (c == EOF) {
497 cf->eof = 1;
498 cf->linenr++;
499 c = '\n';
500 }
501 return c;
502}
503
504static char *parse_value(void)
505{
506 int quote = 0, comment = 0, space = 0;
507
508 strbuf_reset(&cf->value);
509 for (;;) {
510 int c = get_next_char();
511 if (c == '\n') {
512 if (quote) {
513 cf->linenr--;
514 return NULL;
515 }
516 return cf->value.buf;
517 }
518 if (comment)
519 continue;
520 if (isspace(c) && !quote) {
521 if (cf->value.len)
522 space++;
523 continue;
524 }
525 if (!quote) {
526 if (c == ';' || c == '#') {
527 comment = 1;
528 continue;
529 }
530 }
531 for (; space; space--)
532 strbuf_addch(&cf->value, ' ');
533 if (c == '\\') {
534 c = get_next_char();
535 switch (c) {
536 case '\n':
537 continue;
538 case 't':
539 c = '\t';
540 break;
541 case 'b':
542 c = '\b';
543 break;
544 case 'n':
545 c = '\n';
546 break;
547 /* Some characters escape as themselves */
548 case '\\': case '"':
549 break;
550 /* Reject unknown escape sequences */
551 default:
552 return NULL;
553 }
554 strbuf_addch(&cf->value, c);
555 continue;
556 }
557 if (c == '"') {
558 quote = 1-quote;
559 continue;
560 }
561 strbuf_addch(&cf->value, c);
562 }
563}
564
565static int get_value(config_fn_t fn, void *data, struct strbuf *name)
566{
567 int c;
568 char *value;
569 int ret;
570
571 /* Get the full name */
572 for (;;) {
573 c = get_next_char();
574 if (cf->eof)
575 break;
576 if (!iskeychar(c))
577 break;
578 strbuf_addch(name, tolower(c));
579 }
580
581 while (c == ' ' || c == '\t')
582 c = get_next_char();
583
584 value = NULL;
585 if (c != '\n') {
586 if (c != '=')
587 return -1;
588 value = parse_value();
589 if (!value)
590 return -1;
591 }
592 /*
593 * We already consumed the \n, but we need linenr to point to
594 * the line we just parsed during the call to fn to get
595 * accurate line number in error messages.
596 */
597 cf->linenr--;
598 ret = fn(name->buf, value, data);
599 if (ret >= 0)
600 cf->linenr++;
601 return ret;
602}
603
604static int get_extended_base_var(struct strbuf *name, int c)
605{
606 do {
607 if (c == '\n')
608 goto error_incomplete_line;
609 c = get_next_char();
610 } while (isspace(c));
611
612 /* We require the format to be '[base "extension"]' */
613 if (c != '"')
614 return -1;
615 strbuf_addch(name, '.');
616
617 for (;;) {
618 int c = get_next_char();
619 if (c == '\n')
620 goto error_incomplete_line;
621 if (c == '"')
622 break;
623 if (c == '\\') {
624 c = get_next_char();
625 if (c == '\n')
626 goto error_incomplete_line;
627 }
628 strbuf_addch(name, c);
629 }
630
631 /* Final ']' */
632 if (get_next_char() != ']')
633 return -1;
634 return 0;
635error_incomplete_line:
636 cf->linenr--;
637 return -1;
638}
639
640static int get_base_var(struct strbuf *name)
641{
642 for (;;) {
643 int c = get_next_char();
644 if (cf->eof)
645 return -1;
646 if (c == ']')
647 return 0;
648 if (isspace(c))
649 return get_extended_base_var(name, c);
650 if (!iskeychar(c) && c != '.')
651 return -1;
652 strbuf_addch(name, tolower(c));
653 }
654}
655
656static int git_parse_source(config_fn_t fn, void *data)
657{
658 int comment = 0;
659 int baselen = 0;
660 struct strbuf *var = &cf->var;
661 int error_return = 0;
662 char *error_msg = NULL;
663
664 /* U+FEFF Byte Order Mark in UTF8 */
665 const char *bomptr = utf8_bom;
666
667 for (;;) {
668 int c = get_next_char();
669 if (bomptr && *bomptr) {
670 /* We are at the file beginning; skip UTF8-encoded BOM
671 * if present. Sane editors won't put this in on their
672 * own, but e.g. Windows Notepad will do it happily. */
673 if (c == (*bomptr & 0377)) {
674 bomptr++;
675 continue;
676 } else {
677 /* Do not tolerate partial BOM. */
678 if (bomptr != utf8_bom)
679 break;
680 /* No BOM at file beginning. Cool. */
681 bomptr = NULL;
682 }
683 }
684 if (c == '\n') {
685 if (cf->eof)
686 return 0;
687 comment = 0;
688 continue;
689 }
690 if (comment || isspace(c))
691 continue;
692 if (c == '#' || c == ';') {
693 comment = 1;
694 continue;
695 }
696 if (c == '[') {
697 /* Reset prior to determining a new stem */
698 strbuf_reset(var);
699 if (get_base_var(var) < 0 || var->len < 1)
700 break;
701 strbuf_addch(var, '.');
702 baselen = var->len;
703 continue;
704 }
705 if (!isalpha(c))
706 break;
707 /*
708 * Truncate the var name back to the section header
709 * stem prior to grabbing the suffix part of the name
710 * and the value.
711 */
712 strbuf_setlen(var, baselen);
713 strbuf_addch(var, tolower(c));
714 if (get_value(fn, data, var) < 0)
715 break;
716 }
717
718 switch (cf->origin_type) {
719 case CONFIG_ORIGIN_BLOB:
720 error_msg = xstrfmt(_("bad config line %d in blob %s"),
721 cf->linenr, cf->name);
722 break;
723 case CONFIG_ORIGIN_FILE:
724 error_msg = xstrfmt(_("bad config line %d in file %s"),
725 cf->linenr, cf->name);
726 break;
727 case CONFIG_ORIGIN_STDIN:
728 error_msg = xstrfmt(_("bad config line %d in standard input"),
729 cf->linenr);
730 break;
731 case CONFIG_ORIGIN_SUBMODULE_BLOB:
732 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
733 cf->linenr, cf->name);
734 break;
735 case CONFIG_ORIGIN_CMDLINE:
736 error_msg = xstrfmt(_("bad config line %d in command line %s"),
737 cf->linenr, cf->name);
738 break;
739 default:
740 error_msg = xstrfmt(_("bad config line %d in %s"),
741 cf->linenr, cf->name);
742 }
743
744 if (cf->die_on_error)
745 die("%s", error_msg);
746 else
747 error_return = error("%s", error_msg);
748
749 free(error_msg);
750 return error_return;
751}
752
753static int parse_unit_factor(const char *end, uintmax_t *val)
754{
755 if (!*end)
756 return 1;
757 else if (!strcasecmp(end, "k")) {
758 *val *= 1024;
759 return 1;
760 }
761 else if (!strcasecmp(end, "m")) {
762 *val *= 1024 * 1024;
763 return 1;
764 }
765 else if (!strcasecmp(end, "g")) {
766 *val *= 1024 * 1024 * 1024;
767 return 1;
768 }
769 return 0;
770}
771
772static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
773{
774 if (value && *value) {
775 char *end;
776 intmax_t val;
777 uintmax_t uval;
778 uintmax_t factor = 1;
779
780 errno = 0;
781 val = strtoimax(value, &end, 0);
782 if (errno == ERANGE)
783 return 0;
784 if (!parse_unit_factor(end, &factor)) {
785 errno = EINVAL;
786 return 0;
787 }
788 uval = labs(val);
789 uval *= factor;
790 if (uval > max || labs(val) > uval) {
791 errno = ERANGE;
792 return 0;
793 }
794 val *= factor;
795 *ret = val;
796 return 1;
797 }
798 errno = EINVAL;
799 return 0;
800}
801
802static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
803{
804 if (value && *value) {
805 char *end;
806 uintmax_t val;
807 uintmax_t oldval;
808
809 errno = 0;
810 val = strtoumax(value, &end, 0);
811 if (errno == ERANGE)
812 return 0;
813 oldval = val;
814 if (!parse_unit_factor(end, &val)) {
815 errno = EINVAL;
816 return 0;
817 }
818 if (val > max || oldval > val) {
819 errno = ERANGE;
820 return 0;
821 }
822 *ret = val;
823 return 1;
824 }
825 errno = EINVAL;
826 return 0;
827}
828
829static int git_parse_int(const char *value, int *ret)
830{
831 intmax_t tmp;
832 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
833 return 0;
834 *ret = tmp;
835 return 1;
836}
837
838static int git_parse_int64(const char *value, int64_t *ret)
839{
840 intmax_t tmp;
841 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
842 return 0;
843 *ret = tmp;
844 return 1;
845}
846
847int git_parse_ulong(const char *value, unsigned long *ret)
848{
849 uintmax_t tmp;
850 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
851 return 0;
852 *ret = tmp;
853 return 1;
854}
855
856static int git_parse_ssize_t(const char *value, ssize_t *ret)
857{
858 intmax_t tmp;
859 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
860 return 0;
861 *ret = tmp;
862 return 1;
863}
864
865NORETURN
866static void die_bad_number(const char *name, const char *value)
867{
868 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
869
870 if (!value)
871 value = "";
872
873 if (!(cf && cf->name))
874 die(_("bad numeric config value '%s' for '%s': %s"),
875 value, name, error_type);
876
877 switch (cf->origin_type) {
878 case CONFIG_ORIGIN_BLOB:
879 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
880 value, name, cf->name, error_type);
881 case CONFIG_ORIGIN_FILE:
882 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
883 value, name, cf->name, error_type);
884 case CONFIG_ORIGIN_STDIN:
885 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
886 value, name, error_type);
887 case CONFIG_ORIGIN_SUBMODULE_BLOB:
888 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
889 value, name, cf->name, error_type);
890 case CONFIG_ORIGIN_CMDLINE:
891 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
892 value, name, cf->name, error_type);
893 default:
894 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
895 value, name, cf->name, error_type);
896 }
897}
898
899int git_config_int(const char *name, const char *value)
900{
901 int ret;
902 if (!git_parse_int(value, &ret))
903 die_bad_number(name, value);
904 return ret;
905}
906
907int64_t git_config_int64(const char *name, const char *value)
908{
909 int64_t ret;
910 if (!git_parse_int64(value, &ret))
911 die_bad_number(name, value);
912 return ret;
913}
914
915unsigned long git_config_ulong(const char *name, const char *value)
916{
917 unsigned long ret;
918 if (!git_parse_ulong(value, &ret))
919 die_bad_number(name, value);
920 return ret;
921}
922
923ssize_t git_config_ssize_t(const char *name, const char *value)
924{
925 ssize_t ret;
926 if (!git_parse_ssize_t(value, &ret))
927 die_bad_number(name, value);
928 return ret;
929}
930
931int git_parse_maybe_bool(const char *value)
932{
933 if (!value)
934 return 1;
935 if (!*value)
936 return 0;
937 if (!strcasecmp(value, "true")
938 || !strcasecmp(value, "yes")
939 || !strcasecmp(value, "on"))
940 return 1;
941 if (!strcasecmp(value, "false")
942 || !strcasecmp(value, "no")
943 || !strcasecmp(value, "off"))
944 return 0;
945 return -1;
946}
947
948int git_config_maybe_bool(const char *name, const char *value)
949{
950 int v = git_parse_maybe_bool(value);
951 if (0 <= v)
952 return v;
953 if (git_parse_int(value, &v))
954 return !!v;
955 return -1;
956}
957
958int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
959{
960 int v = git_parse_maybe_bool(value);
961 if (0 <= v) {
962 *is_bool = 1;
963 return v;
964 }
965 *is_bool = 0;
966 return git_config_int(name, value);
967}
968
969int git_config_bool(const char *name, const char *value)
970{
971 int discard;
972 return !!git_config_bool_or_int(name, value, &discard);
973}
974
975int git_config_string(const char **dest, const char *var, const char *value)
976{
977 if (!value)
978 return config_error_nonbool(var);
979 *dest = xstrdup(value);
980 return 0;
981}
982
983int git_config_pathname(const char **dest, const char *var, const char *value)
984{
985 if (!value)
986 return config_error_nonbool(var);
987 *dest = expand_user_path(value, 0);
988 if (!*dest)
989 die(_("failed to expand user dir in: '%s'"), value);
990 return 0;
991}
992
993static int git_default_core_config(const char *var, const char *value)
994{
995 /* This needs a better name */
996 if (!strcmp(var, "core.filemode")) {
997 trust_executable_bit = git_config_bool(var, value);
998 return 0;
999 }
1000 if (!strcmp(var, "core.trustctime")) {
1001 trust_ctime = git_config_bool(var, value);
1002 return 0;
1003 }
1004 if (!strcmp(var, "core.checkstat")) {
1005 if (!strcasecmp(value, "default"))
1006 check_stat = 1;
1007 else if (!strcasecmp(value, "minimal"))
1008 check_stat = 0;
1009 }
1010
1011 if (!strcmp(var, "core.quotepath")) {
1012 quote_path_fully = git_config_bool(var, value);
1013 return 0;
1014 }
1015
1016 if (!strcmp(var, "core.symlinks")) {
1017 has_symlinks = git_config_bool(var, value);
1018 return 0;
1019 }
1020
1021 if (!strcmp(var, "core.ignorecase")) {
1022 ignore_case = git_config_bool(var, value);
1023 return 0;
1024 }
1025
1026 if (!strcmp(var, "core.attributesfile"))
1027 return git_config_pathname(&git_attributes_file, var, value);
1028
1029 if (!strcmp(var, "core.hookspath"))
1030 return git_config_pathname(&git_hooks_path, var, value);
1031
1032 if (!strcmp(var, "core.bare")) {
1033 is_bare_repository_cfg = git_config_bool(var, value);
1034 return 0;
1035 }
1036
1037 if (!strcmp(var, "core.ignorestat")) {
1038 assume_unchanged = git_config_bool(var, value);
1039 return 0;
1040 }
1041
1042 if (!strcmp(var, "core.prefersymlinkrefs")) {
1043 prefer_symlink_refs = git_config_bool(var, value);
1044 return 0;
1045 }
1046
1047 if (!strcmp(var, "core.logallrefupdates")) {
1048 if (value && !strcasecmp(value, "always"))
1049 log_all_ref_updates = LOG_REFS_ALWAYS;
1050 else if (git_config_bool(var, value))
1051 log_all_ref_updates = LOG_REFS_NORMAL;
1052 else
1053 log_all_ref_updates = LOG_REFS_NONE;
1054 return 0;
1055 }
1056
1057 if (!strcmp(var, "core.warnambiguousrefs")) {
1058 warn_ambiguous_refs = git_config_bool(var, value);
1059 return 0;
1060 }
1061
1062 if (!strcmp(var, "core.abbrev")) {
1063 if (!value)
1064 return config_error_nonbool(var);
1065 if (!strcasecmp(value, "auto"))
1066 default_abbrev = -1;
1067 else {
1068 int abbrev = git_config_int(var, value);
1069 if (abbrev < minimum_abbrev || abbrev > 40)
1070 return error("abbrev length out of range: %d", abbrev);
1071 default_abbrev = abbrev;
1072 }
1073 return 0;
1074 }
1075
1076 if (!strcmp(var, "core.disambiguate"))
1077 return set_disambiguate_hint_config(var, value);
1078
1079 if (!strcmp(var, "core.loosecompression")) {
1080 int level = git_config_int(var, value);
1081 if (level == -1)
1082 level = Z_DEFAULT_COMPRESSION;
1083 else if (level < 0 || level > Z_BEST_COMPRESSION)
1084 die(_("bad zlib compression level %d"), level);
1085 zlib_compression_level = level;
1086 zlib_compression_seen = 1;
1087 return 0;
1088 }
1089
1090 if (!strcmp(var, "core.compression")) {
1091 int level = git_config_int(var, value);
1092 if (level == -1)
1093 level = Z_DEFAULT_COMPRESSION;
1094 else if (level < 0 || level > Z_BEST_COMPRESSION)
1095 die(_("bad zlib compression level %d"), level);
1096 core_compression_level = level;
1097 core_compression_seen = 1;
1098 if (!zlib_compression_seen)
1099 zlib_compression_level = level;
1100 if (!pack_compression_seen)
1101 pack_compression_level = level;
1102 return 0;
1103 }
1104
1105 if (!strcmp(var, "core.packedgitwindowsize")) {
1106 int pgsz_x2 = getpagesize() * 2;
1107 packed_git_window_size = git_config_ulong(var, value);
1108
1109 /* This value must be multiple of (pagesize * 2) */
1110 packed_git_window_size /= pgsz_x2;
1111 if (packed_git_window_size < 1)
1112 packed_git_window_size = 1;
1113 packed_git_window_size *= pgsz_x2;
1114 return 0;
1115 }
1116
1117 if (!strcmp(var, "core.bigfilethreshold")) {
1118 big_file_threshold = git_config_ulong(var, value);
1119 return 0;
1120 }
1121
1122 if (!strcmp(var, "core.packedgitlimit")) {
1123 packed_git_limit = git_config_ulong(var, value);
1124 return 0;
1125 }
1126
1127 if (!strcmp(var, "core.deltabasecachelimit")) {
1128 delta_base_cache_limit = git_config_ulong(var, value);
1129 return 0;
1130 }
1131
1132 if (!strcmp(var, "core.autocrlf")) {
1133 if (value && !strcasecmp(value, "input")) {
1134 auto_crlf = AUTO_CRLF_INPUT;
1135 return 0;
1136 }
1137 auto_crlf = git_config_bool(var, value);
1138 return 0;
1139 }
1140
1141 if (!strcmp(var, "core.safecrlf")) {
1142 if (value && !strcasecmp(value, "warn")) {
1143 safe_crlf = SAFE_CRLF_WARN;
1144 return 0;
1145 }
1146 safe_crlf = git_config_bool(var, value);
1147 return 0;
1148 }
1149
1150 if (!strcmp(var, "core.eol")) {
1151 if (value && !strcasecmp(value, "lf"))
1152 core_eol = EOL_LF;
1153 else if (value && !strcasecmp(value, "crlf"))
1154 core_eol = EOL_CRLF;
1155 else if (value && !strcasecmp(value, "native"))
1156 core_eol = EOL_NATIVE;
1157 else
1158 core_eol = EOL_UNSET;
1159 return 0;
1160 }
1161
1162 if (!strcmp(var, "core.notesref")) {
1163 notes_ref_name = xstrdup(value);
1164 return 0;
1165 }
1166
1167 if (!strcmp(var, "core.editor"))
1168 return git_config_string(&editor_program, var, value);
1169
1170 if (!strcmp(var, "core.commentchar")) {
1171 if (!value)
1172 return config_error_nonbool(var);
1173 else if (!strcasecmp(value, "auto"))
1174 auto_comment_line_char = 1;
1175 else if (value[0] && !value[1]) {
1176 comment_line_char = value[0];
1177 auto_comment_line_char = 0;
1178 } else
1179 return error("core.commentChar should only be one character");
1180 return 0;
1181 }
1182
1183 if (!strcmp(var, "core.askpass"))
1184 return git_config_string(&askpass_program, var, value);
1185
1186 if (!strcmp(var, "core.excludesfile"))
1187 return git_config_pathname(&excludes_file, var, value);
1188
1189 if (!strcmp(var, "core.whitespace")) {
1190 if (!value)
1191 return config_error_nonbool(var);
1192 whitespace_rule_cfg = parse_whitespace_rule(value);
1193 return 0;
1194 }
1195
1196 if (!strcmp(var, "core.fsyncobjectfiles")) {
1197 fsync_object_files = git_config_bool(var, value);
1198 return 0;
1199 }
1200
1201 if (!strcmp(var, "core.preloadindex")) {
1202 core_preload_index = git_config_bool(var, value);
1203 return 0;
1204 }
1205
1206 if (!strcmp(var, "core.createobject")) {
1207 if (!strcmp(value, "rename"))
1208 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1209 else if (!strcmp(value, "link"))
1210 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1211 else
1212 die(_("invalid mode for object creation: %s"), value);
1213 return 0;
1214 }
1215
1216 if (!strcmp(var, "core.sparsecheckout")) {
1217 core_apply_sparse_checkout = git_config_bool(var, value);
1218 return 0;
1219 }
1220
1221 if (!strcmp(var, "core.precomposeunicode")) {
1222 precomposed_unicode = git_config_bool(var, value);
1223 return 0;
1224 }
1225
1226 if (!strcmp(var, "core.protecthfs")) {
1227 protect_hfs = git_config_bool(var, value);
1228 return 0;
1229 }
1230
1231 if (!strcmp(var, "core.protectntfs")) {
1232 protect_ntfs = git_config_bool(var, value);
1233 return 0;
1234 }
1235
1236 if (!strcmp(var, "core.hidedotfiles")) {
1237 if (value && !strcasecmp(value, "dotgitonly"))
1238 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1239 else
1240 hide_dotfiles = git_config_bool(var, value);
1241 return 0;
1242 }
1243
1244 /* Add other config variables here and to Documentation/config.txt. */
1245 return 0;
1246}
1247
1248static int git_default_i18n_config(const char *var, const char *value)
1249{
1250 if (!strcmp(var, "i18n.commitencoding"))
1251 return git_config_string(&git_commit_encoding, var, value);
1252
1253 if (!strcmp(var, "i18n.logoutputencoding"))
1254 return git_config_string(&git_log_output_encoding, var, value);
1255
1256 /* Add other config variables here and to Documentation/config.txt. */
1257 return 0;
1258}
1259
1260static int git_default_branch_config(const char *var, const char *value)
1261{
1262 if (!strcmp(var, "branch.autosetupmerge")) {
1263 if (value && !strcasecmp(value, "always")) {
1264 git_branch_track = BRANCH_TRACK_ALWAYS;
1265 return 0;
1266 }
1267 git_branch_track = git_config_bool(var, value);
1268 return 0;
1269 }
1270 if (!strcmp(var, "branch.autosetuprebase")) {
1271 if (!value)
1272 return config_error_nonbool(var);
1273 else if (!strcmp(value, "never"))
1274 autorebase = AUTOREBASE_NEVER;
1275 else if (!strcmp(value, "local"))
1276 autorebase = AUTOREBASE_LOCAL;
1277 else if (!strcmp(value, "remote"))
1278 autorebase = AUTOREBASE_REMOTE;
1279 else if (!strcmp(value, "always"))
1280 autorebase = AUTOREBASE_ALWAYS;
1281 else
1282 return error("malformed value for %s", var);
1283 return 0;
1284 }
1285
1286 /* Add other config variables here and to Documentation/config.txt. */
1287 return 0;
1288}
1289
1290static int git_default_push_config(const char *var, const char *value)
1291{
1292 if (!strcmp(var, "push.default")) {
1293 if (!value)
1294 return config_error_nonbool(var);
1295 else if (!strcmp(value, "nothing"))
1296 push_default = PUSH_DEFAULT_NOTHING;
1297 else if (!strcmp(value, "matching"))
1298 push_default = PUSH_DEFAULT_MATCHING;
1299 else if (!strcmp(value, "simple"))
1300 push_default = PUSH_DEFAULT_SIMPLE;
1301 else if (!strcmp(value, "upstream"))
1302 push_default = PUSH_DEFAULT_UPSTREAM;
1303 else if (!strcmp(value, "tracking")) /* deprecated */
1304 push_default = PUSH_DEFAULT_UPSTREAM;
1305 else if (!strcmp(value, "current"))
1306 push_default = PUSH_DEFAULT_CURRENT;
1307 else {
1308 error("malformed value for %s: %s", var, value);
1309 return error("Must be one of nothing, matching, simple, "
1310 "upstream or current.");
1311 }
1312 return 0;
1313 }
1314
1315 /* Add other config variables here and to Documentation/config.txt. */
1316 return 0;
1317}
1318
1319static int git_default_mailmap_config(const char *var, const char *value)
1320{
1321 if (!strcmp(var, "mailmap.file"))
1322 return git_config_pathname(&git_mailmap_file, var, value);
1323 if (!strcmp(var, "mailmap.blob"))
1324 return git_config_string(&git_mailmap_blob, var, value);
1325
1326 /* Add other config variables here and to Documentation/config.txt. */
1327 return 0;
1328}
1329
1330int git_default_config(const char *var, const char *value, void *dummy)
1331{
1332 if (starts_with(var, "core."))
1333 return git_default_core_config(var, value);
1334
1335 if (starts_with(var, "user."))
1336 return git_ident_config(var, value, dummy);
1337
1338 if (starts_with(var, "i18n."))
1339 return git_default_i18n_config(var, value);
1340
1341 if (starts_with(var, "branch."))
1342 return git_default_branch_config(var, value);
1343
1344 if (starts_with(var, "push."))
1345 return git_default_push_config(var, value);
1346
1347 if (starts_with(var, "mailmap."))
1348 return git_default_mailmap_config(var, value);
1349
1350 if (starts_with(var, "advice."))
1351 return git_default_advice_config(var, value);
1352
1353 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1354 pager_use_color = git_config_bool(var,value);
1355 return 0;
1356 }
1357
1358 if (!strcmp(var, "pack.packsizelimit")) {
1359 pack_size_limit_cfg = git_config_ulong(var, value);
1360 return 0;
1361 }
1362
1363 if (!strcmp(var, "pack.compression")) {
1364 int level = git_config_int(var, value);
1365 if (level == -1)
1366 level = Z_DEFAULT_COMPRESSION;
1367 else if (level < 0 || level > Z_BEST_COMPRESSION)
1368 die(_("bad pack compression level %d"), level);
1369 pack_compression_level = level;
1370 pack_compression_seen = 1;
1371 return 0;
1372 }
1373
1374 /* Add other config variables here and to Documentation/config.txt. */
1375 return 0;
1376}
1377
1378/*
1379 * All source specific fields in the union, die_on_error, name and the callbacks
1380 * fgetc, ungetc, ftell of top need to be initialized before calling
1381 * this function.
1382 */
1383static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1384{
1385 int ret;
1386
1387 /* push config-file parsing state stack */
1388 top->prev = cf;
1389 top->linenr = 1;
1390 top->eof = 0;
1391 strbuf_init(&top->value, 1024);
1392 strbuf_init(&top->var, 1024);
1393 cf = top;
1394
1395 ret = git_parse_source(fn, data);
1396
1397 /* pop config-file parsing state stack */
1398 strbuf_release(&top->value);
1399 strbuf_release(&top->var);
1400 cf = top->prev;
1401
1402 return ret;
1403}
1404
1405static int do_config_from_file(config_fn_t fn,
1406 const enum config_origin_type origin_type,
1407 const char *name, const char *path, FILE *f,
1408 void *data)
1409{
1410 struct config_source top;
1411
1412 top.u.file = f;
1413 top.origin_type = origin_type;
1414 top.name = name;
1415 top.path = path;
1416 top.die_on_error = 1;
1417 top.do_fgetc = config_file_fgetc;
1418 top.do_ungetc = config_file_ungetc;
1419 top.do_ftell = config_file_ftell;
1420
1421 return do_config_from(&top, fn, data);
1422}
1423
1424static int git_config_from_stdin(config_fn_t fn, void *data)
1425{
1426 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1427}
1428
1429int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1430{
1431 int ret = -1;
1432 FILE *f;
1433
1434 f = fopen_or_warn(filename, "r");
1435 if (f) {
1436 flockfile(f);
1437 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1438 funlockfile(f);
1439 fclose(f);
1440 }
1441 return ret;
1442}
1443
1444int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1445 const char *name, const char *buf, size_t len, void *data)
1446{
1447 struct config_source top;
1448
1449 top.u.buf.buf = buf;
1450 top.u.buf.len = len;
1451 top.u.buf.pos = 0;
1452 top.origin_type = origin_type;
1453 top.name = name;
1454 top.path = NULL;
1455 top.die_on_error = 0;
1456 top.do_fgetc = config_buf_fgetc;
1457 top.do_ungetc = config_buf_ungetc;
1458 top.do_ftell = config_buf_ftell;
1459
1460 return do_config_from(&top, fn, data);
1461}
1462
1463int git_config_from_blob_sha1(config_fn_t fn,
1464 const char *name,
1465 const unsigned char *sha1,
1466 void *data)
1467{
1468 enum object_type type;
1469 char *buf;
1470 unsigned long size;
1471 int ret;
1472
1473 buf = read_sha1_file(sha1, &type, &size);
1474 if (!buf)
1475 return error("unable to load config blob object '%s'", name);
1476 if (type != OBJ_BLOB) {
1477 free(buf);
1478 return error("reference '%s' does not point to a blob", name);
1479 }
1480
1481 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1482 free(buf);
1483
1484 return ret;
1485}
1486
1487static int git_config_from_blob_ref(config_fn_t fn,
1488 const char *name,
1489 void *data)
1490{
1491 unsigned char sha1[20];
1492
1493 if (get_sha1(name, sha1) < 0)
1494 return error("unable to resolve config blob '%s'", name);
1495 return git_config_from_blob_sha1(fn, name, sha1, data);
1496}
1497
1498const char *git_etc_gitconfig(void)
1499{
1500 static const char *system_wide;
1501 if (!system_wide)
1502 system_wide = system_path(ETC_GITCONFIG);
1503 return system_wide;
1504}
1505
1506/*
1507 * Parse environment variable 'k' as a boolean (in various
1508 * possible spellings); if missing, use the default value 'def'.
1509 */
1510int git_env_bool(const char *k, int def)
1511{
1512 const char *v = getenv(k);
1513 return v ? git_config_bool(k, v) : def;
1514}
1515
1516/*
1517 * Parse environment variable 'k' as ulong with possibly a unit
1518 * suffix; if missing, use the default value 'val'.
1519 */
1520unsigned long git_env_ulong(const char *k, unsigned long val)
1521{
1522 const char *v = getenv(k);
1523 if (v && !git_parse_ulong(v, &val))
1524 die("failed to parse %s", k);
1525 return val;
1526}
1527
1528int git_config_system(void)
1529{
1530 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1531}
1532
1533static int do_git_config_sequence(const struct config_options *opts,
1534 config_fn_t fn, void *data)
1535{
1536 int ret = 0;
1537 char *xdg_config = xdg_config_home("config");
1538 char *user_config = expand_user_path("~/.gitconfig", 0);
1539 char *repo_config;
1540
1541 if (opts->commondir)
1542 repo_config = mkpathdup("%s/config", opts->commondir);
1543 else
1544 repo_config = NULL;
1545
1546 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1547 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1548 ret += git_config_from_file(fn, git_etc_gitconfig(),
1549 data);
1550
1551 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1552 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1553 ret += git_config_from_file(fn, xdg_config, data);
1554
1555 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1556 ret += git_config_from_file(fn, user_config, data);
1557
1558 current_parsing_scope = CONFIG_SCOPE_REPO;
1559 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1560 ret += git_config_from_file(fn, repo_config, data);
1561
1562 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1563 if (git_config_from_parameters(fn, data) < 0)
1564 die(_("unable to parse command-line config"));
1565
1566 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1567 free(xdg_config);
1568 free(user_config);
1569 free(repo_config);
1570 return ret;
1571}
1572
1573int config_with_options(config_fn_t fn, void *data,
1574 struct git_config_source *config_source,
1575 const struct config_options *opts)
1576{
1577 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1578
1579 if (opts->respect_includes) {
1580 inc.fn = fn;
1581 inc.data = data;
1582 inc.opts = opts;
1583 fn = git_config_include;
1584 data = &inc;
1585 }
1586
1587 /*
1588 * If we have a specific filename, use it. Otherwise, follow the
1589 * regular lookup sequence.
1590 */
1591 if (config_source && config_source->use_stdin)
1592 return git_config_from_stdin(fn, data);
1593 else if (config_source && config_source->file)
1594 return git_config_from_file(fn, config_source->file, data);
1595 else if (config_source && config_source->blob)
1596 return git_config_from_blob_ref(fn, config_source->blob, data);
1597
1598 return do_git_config_sequence(opts, fn, data);
1599}
1600
1601static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1602{
1603 int i, value_index;
1604 struct string_list *values;
1605 struct config_set_element *entry;
1606 struct configset_list *list = &cs->list;
1607
1608 for (i = 0; i < list->nr; i++) {
1609 entry = list->items[i].e;
1610 value_index = list->items[i].value_index;
1611 values = &entry->value_list;
1612
1613 current_config_kvi = values->items[value_index].util;
1614
1615 if (fn(entry->key, values->items[value_index].string, data) < 0)
1616 git_die_config_linenr(entry->key,
1617 current_config_kvi->filename,
1618 current_config_kvi->linenr);
1619
1620 current_config_kvi = NULL;
1621 }
1622}
1623
1624void read_early_config(config_fn_t cb, void *data)
1625{
1626 struct config_options opts = {0};
1627 struct strbuf commondir = STRBUF_INIT;
1628 struct strbuf gitdir = STRBUF_INIT;
1629
1630 opts.respect_includes = 1;
1631
1632 if (have_git_dir()) {
1633 opts.commondir = get_git_common_dir();
1634 opts.git_dir = get_git_dir();
1635 /*
1636 * When setup_git_directory() was not yet asked to discover the
1637 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1638 * is any repository config we should use (but unlike
1639 * setup_git_directory_gently(), no global state is changed, most
1640 * notably, the current working directory is still the same after the
1641 * call).
1642 */
1643 } else if (!discover_git_directory(&commondir, &gitdir)) {
1644 opts.commondir = commondir.buf;
1645 opts.git_dir = gitdir.buf;
1646 }
1647
1648 config_with_options(cb, data, NULL, &opts);
1649
1650 strbuf_release(&commondir);
1651 strbuf_release(&gitdir);
1652}
1653
1654static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1655{
1656 struct config_set_element k;
1657 struct config_set_element *found_entry;
1658 char *normalized_key;
1659 /*
1660 * `key` may come from the user, so normalize it before using it
1661 * for querying entries from the hashmap.
1662 */
1663 if (git_config_parse_key(key, &normalized_key, NULL))
1664 return NULL;
1665
1666 hashmap_entry_init(&k, strhash(normalized_key));
1667 k.key = normalized_key;
1668 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1669 free(normalized_key);
1670 return found_entry;
1671}
1672
1673static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1674{
1675 struct config_set_element *e;
1676 struct string_list_item *si;
1677 struct configset_list_item *l_item;
1678 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1679
1680 e = configset_find_element(cs, key);
1681 /*
1682 * Since the keys are being fed by git_config*() callback mechanism, they
1683 * are already normalized. So simply add them without any further munging.
1684 */
1685 if (!e) {
1686 e = xmalloc(sizeof(*e));
1687 hashmap_entry_init(e, strhash(key));
1688 e->key = xstrdup(key);
1689 string_list_init(&e->value_list, 1);
1690 hashmap_add(&cs->config_hash, e);
1691 }
1692 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1693
1694 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1695 l_item = &cs->list.items[cs->list.nr++];
1696 l_item->e = e;
1697 l_item->value_index = e->value_list.nr - 1;
1698
1699 if (!cf)
1700 die("BUG: configset_add_value has no source");
1701 if (cf->name) {
1702 kv_info->filename = strintern(cf->name);
1703 kv_info->linenr = cf->linenr;
1704 kv_info->origin_type = cf->origin_type;
1705 } else {
1706 /* for values read from `git_config_from_parameters()` */
1707 kv_info->filename = NULL;
1708 kv_info->linenr = -1;
1709 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1710 }
1711 kv_info->scope = current_parsing_scope;
1712 si->util = kv_info;
1713
1714 return 0;
1715}
1716
1717static int config_set_element_cmp(const void *unused_cmp_data,
1718 const struct config_set_element *e1,
1719 const struct config_set_element *e2,
1720 const void *unused_keydata)
1721{
1722 return strcmp(e1->key, e2->key);
1723}
1724
1725void git_configset_init(struct config_set *cs)
1726{
1727 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp,
1728 NULL, 0);
1729 cs->hash_initialized = 1;
1730 cs->list.nr = 0;
1731 cs->list.alloc = 0;
1732 cs->list.items = NULL;
1733}
1734
1735void git_configset_clear(struct config_set *cs)
1736{
1737 struct config_set_element *entry;
1738 struct hashmap_iter iter;
1739 if (!cs->hash_initialized)
1740 return;
1741
1742 hashmap_iter_init(&cs->config_hash, &iter);
1743 while ((entry = hashmap_iter_next(&iter))) {
1744 free(entry->key);
1745 string_list_clear(&entry->value_list, 1);
1746 }
1747 hashmap_free(&cs->config_hash, 1);
1748 cs->hash_initialized = 0;
1749 free(cs->list.items);
1750 cs->list.nr = 0;
1751 cs->list.alloc = 0;
1752 cs->list.items = NULL;
1753}
1754
1755static int config_set_callback(const char *key, const char *value, void *cb)
1756{
1757 struct config_set *cs = cb;
1758 configset_add_value(cs, key, value);
1759 return 0;
1760}
1761
1762int git_configset_add_file(struct config_set *cs, const char *filename)
1763{
1764 return git_config_from_file(config_set_callback, filename, cs);
1765}
1766
1767int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1768{
1769 const struct string_list *values = NULL;
1770 /*
1771 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1772 * queried key in the files of the configset, the value returned will be the last
1773 * value in the value list for that key.
1774 */
1775 values = git_configset_get_value_multi(cs, key);
1776
1777 if (!values)
1778 return 1;
1779 assert(values->nr > 0);
1780 *value = values->items[values->nr - 1].string;
1781 return 0;
1782}
1783
1784const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1785{
1786 struct config_set_element *e = configset_find_element(cs, key);
1787 return e ? &e->value_list : NULL;
1788}
1789
1790int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1791{
1792 const char *value;
1793 if (!git_configset_get_value(cs, key, &value))
1794 return git_config_string(dest, key, value);
1795 else
1796 return 1;
1797}
1798
1799int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1800{
1801 return git_configset_get_string_const(cs, key, (const char **)dest);
1802}
1803
1804int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1805{
1806 const char *value;
1807 if (!git_configset_get_value(cs, key, &value)) {
1808 *dest = git_config_int(key, value);
1809 return 0;
1810 } else
1811 return 1;
1812}
1813
1814int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1815{
1816 const char *value;
1817 if (!git_configset_get_value(cs, key, &value)) {
1818 *dest = git_config_ulong(key, value);
1819 return 0;
1820 } else
1821 return 1;
1822}
1823
1824int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1825{
1826 const char *value;
1827 if (!git_configset_get_value(cs, key, &value)) {
1828 *dest = git_config_bool(key, value);
1829 return 0;
1830 } else
1831 return 1;
1832}
1833
1834int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1835 int *is_bool, int *dest)
1836{
1837 const char *value;
1838 if (!git_configset_get_value(cs, key, &value)) {
1839 *dest = git_config_bool_or_int(key, value, is_bool);
1840 return 0;
1841 } else
1842 return 1;
1843}
1844
1845int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1846{
1847 const char *value;
1848 if (!git_configset_get_value(cs, key, &value)) {
1849 *dest = git_config_maybe_bool(key, value);
1850 if (*dest == -1)
1851 return -1;
1852 return 0;
1853 } else
1854 return 1;
1855}
1856
1857int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1858{
1859 const char *value;
1860 if (!git_configset_get_value(cs, key, &value))
1861 return git_config_pathname(dest, key, value);
1862 else
1863 return 1;
1864}
1865
1866/* Functions use to read configuration from a repository */
1867static void repo_read_config(struct repository *repo)
1868{
1869 struct config_options opts;
1870
1871 opts.respect_includes = 1;
1872 opts.commondir = repo->commondir;
1873 opts.git_dir = repo->gitdir;
1874
1875 if (!repo->config)
1876 repo->config = xcalloc(1, sizeof(struct config_set));
1877 else
1878 git_configset_clear(repo->config);
1879
1880 git_configset_init(repo->config);
1881
1882 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1883 /*
1884 * config_with_options() normally returns only
1885 * zero, as most errors are fatal, and
1886 * non-fatal potential errors are guarded by "if"
1887 * statements that are entered only when no error is
1888 * possible.
1889 *
1890 * If we ever encounter a non-fatal error, it means
1891 * something went really wrong and we should stop
1892 * immediately.
1893 */
1894 die(_("unknown error occurred while reading the configuration files"));
1895}
1896
1897static void git_config_check_init(struct repository *repo)
1898{
1899 if (repo->config && repo->config->hash_initialized)
1900 return;
1901 repo_read_config(repo);
1902}
1903
1904static void repo_config_clear(struct repository *repo)
1905{
1906 if (!repo->config || !repo->config->hash_initialized)
1907 return;
1908 git_configset_clear(repo->config);
1909}
1910
1911void repo_config(struct repository *repo, config_fn_t fn, void *data)
1912{
1913 git_config_check_init(repo);
1914 configset_iter(repo->config, fn, data);
1915}
1916
1917int repo_config_get_value(struct repository *repo,
1918 const char *key, const char **value)
1919{
1920 git_config_check_init(repo);
1921 return git_configset_get_value(repo->config, key, value);
1922}
1923
1924const struct string_list *repo_config_get_value_multi(struct repository *repo,
1925 const char *key)
1926{
1927 git_config_check_init(repo);
1928 return git_configset_get_value_multi(repo->config, key);
1929}
1930
1931int repo_config_get_string_const(struct repository *repo,
1932 const char *key, const char **dest)
1933{
1934 int ret;
1935 git_config_check_init(repo);
1936 ret = git_configset_get_string_const(repo->config, key, dest);
1937 if (ret < 0)
1938 git_die_config(key, NULL);
1939 return ret;
1940}
1941
1942int repo_config_get_string(struct repository *repo,
1943 const char *key, char **dest)
1944{
1945 git_config_check_init(repo);
1946 return repo_config_get_string_const(repo, key, (const char **)dest);
1947}
1948
1949int repo_config_get_int(struct repository *repo,
1950 const char *key, int *dest)
1951{
1952 git_config_check_init(repo);
1953 return git_configset_get_int(repo->config, key, dest);
1954}
1955
1956int repo_config_get_ulong(struct repository *repo,
1957 const char *key, unsigned long *dest)
1958{
1959 git_config_check_init(repo);
1960 return git_configset_get_ulong(repo->config, key, dest);
1961}
1962
1963int repo_config_get_bool(struct repository *repo,
1964 const char *key, int *dest)
1965{
1966 git_config_check_init(repo);
1967 return git_configset_get_bool(repo->config, key, dest);
1968}
1969
1970int repo_config_get_bool_or_int(struct repository *repo,
1971 const char *key, int *is_bool, int *dest)
1972{
1973 git_config_check_init(repo);
1974 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
1975}
1976
1977int repo_config_get_maybe_bool(struct repository *repo,
1978 const char *key, int *dest)
1979{
1980 git_config_check_init(repo);
1981 return git_configset_get_maybe_bool(repo->config, key, dest);
1982}
1983
1984int repo_config_get_pathname(struct repository *repo,
1985 const char *key, const char **dest)
1986{
1987 int ret;
1988 git_config_check_init(repo);
1989 ret = git_configset_get_pathname(repo->config, key, dest);
1990 if (ret < 0)
1991 git_die_config(key, NULL);
1992 return ret;
1993}
1994
1995/* Functions used historically to read configuration from 'the_repository' */
1996void git_config(config_fn_t fn, void *data)
1997{
1998 repo_config(the_repository, fn, data);
1999}
2000
2001void git_config_clear(void)
2002{
2003 repo_config_clear(the_repository);
2004}
2005
2006int git_config_get_value(const char *key, const char **value)
2007{
2008 return repo_config_get_value(the_repository, key, value);
2009}
2010
2011const struct string_list *git_config_get_value_multi(const char *key)
2012{
2013 return repo_config_get_value_multi(the_repository, key);
2014}
2015
2016int git_config_get_string_const(const char *key, const char **dest)
2017{
2018 return repo_config_get_string_const(the_repository, key, dest);
2019}
2020
2021int git_config_get_string(const char *key, char **dest)
2022{
2023 return repo_config_get_string(the_repository, key, dest);
2024}
2025
2026int git_config_get_int(const char *key, int *dest)
2027{
2028 return repo_config_get_int(the_repository, key, dest);
2029}
2030
2031int git_config_get_ulong(const char *key, unsigned long *dest)
2032{
2033 return repo_config_get_ulong(the_repository, key, dest);
2034}
2035
2036int git_config_get_bool(const char *key, int *dest)
2037{
2038 return repo_config_get_bool(the_repository, key, dest);
2039}
2040
2041int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2042{
2043 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2044}
2045
2046int git_config_get_maybe_bool(const char *key, int *dest)
2047{
2048 return repo_config_get_maybe_bool(the_repository, key, dest);
2049}
2050
2051int git_config_get_pathname(const char *key, const char **dest)
2052{
2053 return repo_config_get_pathname(the_repository, key, dest);
2054}
2055
2056int git_config_get_expiry(const char *key, const char **output)
2057{
2058 int ret = git_config_get_string_const(key, output);
2059 if (ret)
2060 return ret;
2061 if (strcmp(*output, "now")) {
2062 timestamp_t now = approxidate("now");
2063 if (approxidate(*output) >= now)
2064 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2065 }
2066 return ret;
2067}
2068
2069int git_config_get_untracked_cache(void)
2070{
2071 int val = -1;
2072 const char *v;
2073
2074 /* Hack for test programs like test-dump-untracked-cache */
2075 if (ignore_untracked_cache_config)
2076 return -1;
2077
2078 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2079 return val;
2080
2081 if (!git_config_get_value("core.untrackedcache", &v)) {
2082 if (!strcasecmp(v, "keep"))
2083 return -1;
2084
2085 error(_("unknown core.untrackedCache value '%s'; "
2086 "using 'keep' default value"), v);
2087 return -1;
2088 }
2089
2090 return -1; /* default value */
2091}
2092
2093int git_config_get_split_index(void)
2094{
2095 int val;
2096
2097 if (!git_config_get_maybe_bool("core.splitindex", &val))
2098 return val;
2099
2100 return -1; /* default value */
2101}
2102
2103int git_config_get_max_percent_split_change(void)
2104{
2105 int val = -1;
2106
2107 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2108 if (0 <= val && val <= 100)
2109 return val;
2110
2111 return error(_("splitIndex.maxPercentChange value '%d' "
2112 "should be between 0 and 100"), val);
2113 }
2114
2115 return -1; /* default value */
2116}
2117
2118NORETURN
2119void git_die_config_linenr(const char *key, const char *filename, int linenr)
2120{
2121 if (!filename)
2122 die(_("unable to parse '%s' from command-line config"), key);
2123 else
2124 die(_("bad config variable '%s' in file '%s' at line %d"),
2125 key, filename, linenr);
2126}
2127
2128NORETURN __attribute__((format(printf, 2, 3)))
2129void git_die_config(const char *key, const char *err, ...)
2130{
2131 const struct string_list *values;
2132 struct key_value_info *kv_info;
2133
2134 if (err) {
2135 va_list params;
2136 va_start(params, err);
2137 vreportf("error: ", err, params);
2138 va_end(params);
2139 }
2140 values = git_config_get_value_multi(key);
2141 kv_info = values->items[values->nr - 1].util;
2142 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2143}
2144
2145/*
2146 * Find all the stuff for git_config_set() below.
2147 */
2148
2149static struct {
2150 int baselen;
2151 char *key;
2152 int do_not_match;
2153 regex_t *value_regex;
2154 int multi_replace;
2155 size_t *offset;
2156 unsigned int offset_alloc;
2157 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2158 int seen;
2159} store;
2160
2161static int matches(const char *key, const char *value)
2162{
2163 if (strcmp(key, store.key))
2164 return 0; /* not ours */
2165 if (!store.value_regex)
2166 return 1; /* always matches */
2167 if (store.value_regex == CONFIG_REGEX_NONE)
2168 return 0; /* never matches */
2169
2170 return store.do_not_match ^
2171 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2172}
2173
2174static int store_aux(const char *key, const char *value, void *cb)
2175{
2176 const char *ep;
2177 size_t section_len;
2178
2179 switch (store.state) {
2180 case KEY_SEEN:
2181 if (matches(key, value)) {
2182 if (store.seen == 1 && store.multi_replace == 0) {
2183 warning(_("%s has multiple values"), key);
2184 }
2185
2186 ALLOC_GROW(store.offset, store.seen + 1,
2187 store.offset_alloc);
2188
2189 store.offset[store.seen] = cf->do_ftell(cf);
2190 store.seen++;
2191 }
2192 break;
2193 case SECTION_SEEN:
2194 /*
2195 * What we are looking for is in store.key (both
2196 * section and var), and its section part is baselen
2197 * long. We found key (again, both section and var).
2198 * We would want to know if this key is in the same
2199 * section as what we are looking for. We already
2200 * know we are in the same section as what should
2201 * hold store.key.
2202 */
2203 ep = strrchr(key, '.');
2204 section_len = ep - key;
2205
2206 if ((section_len != store.baselen) ||
2207 memcmp(key, store.key, section_len+1)) {
2208 store.state = SECTION_END_SEEN;
2209 break;
2210 }
2211
2212 /*
2213 * Do not increment matches: this is no match, but we
2214 * just made sure we are in the desired section.
2215 */
2216 ALLOC_GROW(store.offset, store.seen + 1,
2217 store.offset_alloc);
2218 store.offset[store.seen] = cf->do_ftell(cf);
2219 /* fallthru */
2220 case SECTION_END_SEEN:
2221 case START:
2222 if (matches(key, value)) {
2223 ALLOC_GROW(store.offset, store.seen + 1,
2224 store.offset_alloc);
2225 store.offset[store.seen] = cf->do_ftell(cf);
2226 store.state = KEY_SEEN;
2227 store.seen++;
2228 } else {
2229 if (strrchr(key, '.') - key == store.baselen &&
2230 !strncmp(key, store.key, store.baselen)) {
2231 store.state = SECTION_SEEN;
2232 ALLOC_GROW(store.offset,
2233 store.seen + 1,
2234 store.offset_alloc);
2235 store.offset[store.seen] = cf->do_ftell(cf);
2236 }
2237 }
2238 }
2239 return 0;
2240}
2241
2242static int write_error(const char *filename)
2243{
2244 error("failed to write new configuration file %s", filename);
2245
2246 /* Same error code as "failed to rename". */
2247 return 4;
2248}
2249
2250static int store_write_section(int fd, const char *key)
2251{
2252 const char *dot;
2253 int i, success;
2254 struct strbuf sb = STRBUF_INIT;
2255
2256 dot = memchr(key, '.', store.baselen);
2257 if (dot) {
2258 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2259 for (i = dot - key + 1; i < store.baselen; i++) {
2260 if (key[i] == '"' || key[i] == '\\')
2261 strbuf_addch(&sb, '\\');
2262 strbuf_addch(&sb, key[i]);
2263 }
2264 strbuf_addstr(&sb, "\"]\n");
2265 } else {
2266 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2267 }
2268
2269 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2270 strbuf_release(&sb);
2271
2272 return success;
2273}
2274
2275static int store_write_pair(int fd, const char *key, const char *value)
2276{
2277 int i, success;
2278 int length = strlen(key + store.baselen + 1);
2279 const char *quote = "";
2280 struct strbuf sb = STRBUF_INIT;
2281
2282 /*
2283 * Check to see if the value needs to be surrounded with a dq pair.
2284 * Note that problematic characters are always backslash-quoted; this
2285 * check is about not losing leading or trailing SP and strings that
2286 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2287 * configuration parser.
2288 */
2289 if (value[0] == ' ')
2290 quote = "\"";
2291 for (i = 0; value[i]; i++)
2292 if (value[i] == ';' || value[i] == '#')
2293 quote = "\"";
2294 if (i && value[i - 1] == ' ')
2295 quote = "\"";
2296
2297 strbuf_addf(&sb, "\t%.*s = %s",
2298 length, key + store.baselen + 1, quote);
2299
2300 for (i = 0; value[i]; i++)
2301 switch (value[i]) {
2302 case '\n':
2303 strbuf_addstr(&sb, "\\n");
2304 break;
2305 case '\t':
2306 strbuf_addstr(&sb, "\\t");
2307 break;
2308 case '"':
2309 case '\\':
2310 strbuf_addch(&sb, '\\');
2311 default:
2312 strbuf_addch(&sb, value[i]);
2313 break;
2314 }
2315 strbuf_addf(&sb, "%s\n", quote);
2316
2317 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2318 strbuf_release(&sb);
2319
2320 return success;
2321}
2322
2323static ssize_t find_beginning_of_line(const char *contents, size_t size,
2324 size_t offset_, int *found_bracket)
2325{
2326 size_t equal_offset = size, bracket_offset = size;
2327 ssize_t offset;
2328
2329contline:
2330 for (offset = offset_-2; offset > 0
2331 && contents[offset] != '\n'; offset--)
2332 switch (contents[offset]) {
2333 case '=': equal_offset = offset; break;
2334 case ']': bracket_offset = offset; break;
2335 }
2336 if (offset > 0 && contents[offset-1] == '\\') {
2337 offset_ = offset;
2338 goto contline;
2339 }
2340 if (bracket_offset < equal_offset) {
2341 *found_bracket = 1;
2342 offset = bracket_offset+1;
2343 } else
2344 offset++;
2345
2346 return offset;
2347}
2348
2349int git_config_set_in_file_gently(const char *config_filename,
2350 const char *key, const char *value)
2351{
2352 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2353}
2354
2355void git_config_set_in_file(const char *config_filename,
2356 const char *key, const char *value)
2357{
2358 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2359}
2360
2361int git_config_set_gently(const char *key, const char *value)
2362{
2363 return git_config_set_multivar_gently(key, value, NULL, 0);
2364}
2365
2366void git_config_set(const char *key, const char *value)
2367{
2368 git_config_set_multivar(key, value, NULL, 0);
2369}
2370
2371/*
2372 * If value==NULL, unset in (remove from) config,
2373 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2374 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2375 * (only add a new one)
2376 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2377 * else all matching key/values (regardless how many) are removed,
2378 * before the new pair is written.
2379 *
2380 * Returns 0 on success.
2381 *
2382 * This function does this:
2383 *
2384 * - it locks the config file by creating ".git/config.lock"
2385 *
2386 * - it then parses the config using store_aux() as validator to find
2387 * the position on the key/value pair to replace. If it is to be unset,
2388 * it must be found exactly once.
2389 *
2390 * - the config file is mmap()ed and the part before the match (if any) is
2391 * written to the lock file, then the changed part and the rest.
2392 *
2393 * - the config file is removed and the lock file rename()d to it.
2394 *
2395 */
2396int git_config_set_multivar_in_file_gently(const char *config_filename,
2397 const char *key, const char *value,
2398 const char *value_regex,
2399 int multi_replace)
2400{
2401 int fd = -1, in_fd = -1;
2402 int ret;
2403 struct lock_file *lock = NULL;
2404 char *filename_buf = NULL;
2405 char *contents = NULL;
2406 size_t contents_sz;
2407
2408 /* parse-key returns negative; flip the sign to feed exit(3) */
2409 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2410 if (ret)
2411 goto out_free;
2412
2413 store.multi_replace = multi_replace;
2414
2415 if (!config_filename)
2416 config_filename = filename_buf = git_pathdup("config");
2417
2418 /*
2419 * The lock serves a purpose in addition to locking: the new
2420 * contents of .git/config will be written into it.
2421 */
2422 lock = xcalloc(1, sizeof(struct lock_file));
2423 fd = hold_lock_file_for_update(lock, config_filename, 0);
2424 if (fd < 0) {
2425 error_errno("could not lock config file %s", config_filename);
2426 free(store.key);
2427 ret = CONFIG_NO_LOCK;
2428 goto out_free;
2429 }
2430
2431 /*
2432 * If .git/config does not exist yet, write a minimal version.
2433 */
2434 in_fd = open(config_filename, O_RDONLY);
2435 if ( in_fd < 0 ) {
2436 free(store.key);
2437
2438 if ( ENOENT != errno ) {
2439 error_errno("opening %s", config_filename);
2440 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2441 goto out_free;
2442 }
2443 /* if nothing to unset, error out */
2444 if (value == NULL) {
2445 ret = CONFIG_NOTHING_SET;
2446 goto out_free;
2447 }
2448
2449 store.key = (char *)key;
2450 if (!store_write_section(fd, key) ||
2451 !store_write_pair(fd, key, value))
2452 goto write_err_out;
2453 } else {
2454 struct stat st;
2455 size_t copy_begin, copy_end;
2456 int i, new_line = 0;
2457
2458 if (value_regex == NULL)
2459 store.value_regex = NULL;
2460 else if (value_regex == CONFIG_REGEX_NONE)
2461 store.value_regex = CONFIG_REGEX_NONE;
2462 else {
2463 if (value_regex[0] == '!') {
2464 store.do_not_match = 1;
2465 value_regex++;
2466 } else
2467 store.do_not_match = 0;
2468
2469 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2470 if (regcomp(store.value_regex, value_regex,
2471 REG_EXTENDED)) {
2472 error("invalid pattern: %s", value_regex);
2473 free(store.value_regex);
2474 ret = CONFIG_INVALID_PATTERN;
2475 goto out_free;
2476 }
2477 }
2478
2479 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2480 store.offset[0] = 0;
2481 store.state = START;
2482 store.seen = 0;
2483
2484 /*
2485 * After this, store.offset will contain the *end* offset
2486 * of the last match, or remain at 0 if no match was found.
2487 * As a side effect, we make sure to transform only a valid
2488 * existing config file.
2489 */
2490 if (git_config_from_file(store_aux, config_filename, NULL)) {
2491 error("invalid config file %s", config_filename);
2492 free(store.key);
2493 if (store.value_regex != NULL &&
2494 store.value_regex != CONFIG_REGEX_NONE) {
2495 regfree(store.value_regex);
2496 free(store.value_regex);
2497 }
2498 ret = CONFIG_INVALID_FILE;
2499 goto out_free;
2500 }
2501
2502 free(store.key);
2503 if (store.value_regex != NULL &&
2504 store.value_regex != CONFIG_REGEX_NONE) {
2505 regfree(store.value_regex);
2506 free(store.value_regex);
2507 }
2508
2509 /* if nothing to unset, or too many matches, error out */
2510 if ((store.seen == 0 && value == NULL) ||
2511 (store.seen > 1 && multi_replace == 0)) {
2512 ret = CONFIG_NOTHING_SET;
2513 goto out_free;
2514 }
2515
2516 if (fstat(in_fd, &st) == -1) {
2517 error_errno(_("fstat on %s failed"), config_filename);
2518 ret = CONFIG_INVALID_FILE;
2519 goto out_free;
2520 }
2521
2522 contents_sz = xsize_t(st.st_size);
2523 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2524 MAP_PRIVATE, in_fd, 0);
2525 if (contents == MAP_FAILED) {
2526 if (errno == ENODEV && S_ISDIR(st.st_mode))
2527 errno = EISDIR;
2528 error_errno("unable to mmap '%s'", config_filename);
2529 ret = CONFIG_INVALID_FILE;
2530 contents = NULL;
2531 goto out_free;
2532 }
2533 close(in_fd);
2534 in_fd = -1;
2535
2536 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2537 error_errno("chmod on %s failed", get_lock_file_path(lock));
2538 ret = CONFIG_NO_WRITE;
2539 goto out_free;
2540 }
2541
2542 if (store.seen == 0)
2543 store.seen = 1;
2544
2545 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2546 if (store.offset[i] == 0) {
2547 store.offset[i] = copy_end = contents_sz;
2548 } else if (store.state != KEY_SEEN) {
2549 copy_end = store.offset[i];
2550 } else
2551 copy_end = find_beginning_of_line(
2552 contents, contents_sz,
2553 store.offset[i]-2, &new_line);
2554
2555 if (copy_end > 0 && contents[copy_end-1] != '\n')
2556 new_line = 1;
2557
2558 /* write the first part of the config */
2559 if (copy_end > copy_begin) {
2560 if (write_in_full(fd, contents + copy_begin,
2561 copy_end - copy_begin) <
2562 copy_end - copy_begin)
2563 goto write_err_out;
2564 if (new_line &&
2565 write_str_in_full(fd, "\n") != 1)
2566 goto write_err_out;
2567 }
2568 copy_begin = store.offset[i];
2569 }
2570
2571 /* write the pair (value == NULL means unset) */
2572 if (value != NULL) {
2573 if (store.state == START) {
2574 if (!store_write_section(fd, key))
2575 goto write_err_out;
2576 }
2577 if (!store_write_pair(fd, key, value))
2578 goto write_err_out;
2579 }
2580
2581 /* write the rest of the config */
2582 if (copy_begin < contents_sz)
2583 if (write_in_full(fd, contents + copy_begin,
2584 contents_sz - copy_begin) <
2585 contents_sz - copy_begin)
2586 goto write_err_out;
2587
2588 munmap(contents, contents_sz);
2589 contents = NULL;
2590 }
2591
2592 if (commit_lock_file(lock) < 0) {
2593 error_errno("could not write config file %s", config_filename);
2594 ret = CONFIG_NO_WRITE;
2595 lock = NULL;
2596 goto out_free;
2597 }
2598
2599 /*
2600 * lock is committed, so don't try to roll it back below.
2601 * NOTE: Since lockfile.c keeps a linked list of all created
2602 * lock_file structures, it isn't safe to free(lock). It's
2603 * better to just leave it hanging around.
2604 */
2605 lock = NULL;
2606 ret = 0;
2607
2608 /* Invalidate the config cache */
2609 git_config_clear();
2610
2611out_free:
2612 if (lock)
2613 rollback_lock_file(lock);
2614 free(filename_buf);
2615 if (contents)
2616 munmap(contents, contents_sz);
2617 if (in_fd >= 0)
2618 close(in_fd);
2619 return ret;
2620
2621write_err_out:
2622 ret = write_error(get_lock_file_path(lock));
2623 goto out_free;
2624
2625}
2626
2627void git_config_set_multivar_in_file(const char *config_filename,
2628 const char *key, const char *value,
2629 const char *value_regex, int multi_replace)
2630{
2631 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2632 value_regex, multi_replace))
2633 return;
2634 if (value)
2635 die(_("could not set '%s' to '%s'"), key, value);
2636 else
2637 die(_("could not unset '%s'"), key);
2638}
2639
2640int git_config_set_multivar_gently(const char *key, const char *value,
2641 const char *value_regex, int multi_replace)
2642{
2643 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2644 multi_replace);
2645}
2646
2647void git_config_set_multivar(const char *key, const char *value,
2648 const char *value_regex, int multi_replace)
2649{
2650 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2651 multi_replace);
2652}
2653
2654static int section_name_match (const char *buf, const char *name)
2655{
2656 int i = 0, j = 0, dot = 0;
2657 if (buf[i] != '[')
2658 return 0;
2659 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2660 if (!dot && isspace(buf[i])) {
2661 dot = 1;
2662 if (name[j++] != '.')
2663 break;
2664 for (i++; isspace(buf[i]); i++)
2665 ; /* do nothing */
2666 if (buf[i] != '"')
2667 break;
2668 continue;
2669 }
2670 if (buf[i] == '\\' && dot)
2671 i++;
2672 else if (buf[i] == '"' && dot) {
2673 for (i++; isspace(buf[i]); i++)
2674 ; /* do_nothing */
2675 break;
2676 }
2677 if (buf[i] != name[j++])
2678 break;
2679 }
2680 if (buf[i] == ']' && name[j] == 0) {
2681 /*
2682 * We match, now just find the right length offset by
2683 * gobbling up any whitespace after it, as well
2684 */
2685 i++;
2686 for (; buf[i] && isspace(buf[i]); i++)
2687 ; /* do nothing */
2688 return i;
2689 }
2690 return 0;
2691}
2692
2693static int section_name_is_ok(const char *name)
2694{
2695 /* Empty section names are bogus. */
2696 if (!*name)
2697 return 0;
2698
2699 /*
2700 * Before a dot, we must be alphanumeric or dash. After the first dot,
2701 * anything goes, so we can stop checking.
2702 */
2703 for (; *name && *name != '.'; name++)
2704 if (*name != '-' && !isalnum(*name))
2705 return 0;
2706 return 1;
2707}
2708
2709/* if new_name == NULL, the section is removed instead */
2710int git_config_rename_section_in_file(const char *config_filename,
2711 const char *old_name, const char *new_name)
2712{
2713 int ret = 0, remove = 0;
2714 char *filename_buf = NULL;
2715 struct lock_file *lock;
2716 int out_fd;
2717 char buf[1024];
2718 FILE *config_file = NULL;
2719 struct stat st;
2720
2721 if (new_name && !section_name_is_ok(new_name)) {
2722 ret = error("invalid section name: %s", new_name);
2723 goto out_no_rollback;
2724 }
2725
2726 if (!config_filename)
2727 config_filename = filename_buf = git_pathdup("config");
2728
2729 lock = xcalloc(1, sizeof(struct lock_file));
2730 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2731 if (out_fd < 0) {
2732 ret = error("could not lock config file %s", config_filename);
2733 goto out;
2734 }
2735
2736 if (!(config_file = fopen(config_filename, "rb"))) {
2737 ret = warn_on_fopen_errors(config_filename);
2738 if (ret)
2739 goto out;
2740 /* no config file means nothing to rename, no error */
2741 goto commit_and_out;
2742 }
2743
2744 if (fstat(fileno(config_file), &st) == -1) {
2745 ret = error_errno(_("fstat on %s failed"), config_filename);
2746 goto out;
2747 }
2748
2749 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2750 ret = error_errno("chmod on %s failed",
2751 get_lock_file_path(lock));
2752 goto out;
2753 }
2754
2755 while (fgets(buf, sizeof(buf), config_file)) {
2756 int i;
2757 int length;
2758 char *output = buf;
2759 for (i = 0; buf[i] && isspace(buf[i]); i++)
2760 ; /* do nothing */
2761 if (buf[i] == '[') {
2762 /* it's a section */
2763 int offset = section_name_match(&buf[i], old_name);
2764 if (offset > 0) {
2765 ret++;
2766 if (new_name == NULL) {
2767 remove = 1;
2768 continue;
2769 }
2770 store.baselen = strlen(new_name);
2771 if (!store_write_section(out_fd, new_name)) {
2772 ret = write_error(get_lock_file_path(lock));
2773 goto out;
2774 }
2775 /*
2776 * We wrote out the new section, with
2777 * a newline, now skip the old
2778 * section's length
2779 */
2780 output += offset + i;
2781 if (strlen(output) > 0) {
2782 /*
2783 * More content means there's
2784 * a declaration to put on the
2785 * next line; indent with a
2786 * tab
2787 */
2788 output -= 1;
2789 output[0] = '\t';
2790 }
2791 }
2792 remove = 0;
2793 }
2794 if (remove)
2795 continue;
2796 length = strlen(output);
2797 if (write_in_full(out_fd, output, length) != length) {
2798 ret = write_error(get_lock_file_path(lock));
2799 goto out;
2800 }
2801 }
2802 fclose(config_file);
2803 config_file = NULL;
2804commit_and_out:
2805 if (commit_lock_file(lock) < 0)
2806 ret = error_errno("could not write config file %s",
2807 config_filename);
2808out:
2809 if (config_file)
2810 fclose(config_file);
2811 rollback_lock_file(lock);
2812out_no_rollback:
2813 free(filename_buf);
2814 return ret;
2815}
2816
2817int git_config_rename_section(const char *old_name, const char *new_name)
2818{
2819 return git_config_rename_section_in_file(NULL, old_name, new_name);
2820}
2821
2822/*
2823 * Call this to report error for your variable that should not
2824 * get a boolean value (i.e. "[my] var" means "true").
2825 */
2826#undef config_error_nonbool
2827int config_error_nonbool(const char *var)
2828{
2829 return error("missing value for '%s'", var);
2830}
2831
2832int parse_config_key(const char *var,
2833 const char *section,
2834 const char **subsection, int *subsection_len,
2835 const char **key)
2836{
2837 const char *dot;
2838
2839 /* Does it start with "section." ? */
2840 if (!skip_prefix(var, section, &var) || *var != '.')
2841 return -1;
2842
2843 /*
2844 * Find the key; we don't know yet if we have a subsection, but we must
2845 * parse backwards from the end, since the subsection may have dots in
2846 * it, too.
2847 */
2848 dot = strrchr(var, '.');
2849 *key = dot + 1;
2850
2851 /* Did we have a subsection at all? */
2852 if (dot == var) {
2853 if (subsection) {
2854 *subsection = NULL;
2855 *subsection_len = 0;
2856 }
2857 }
2858 else {
2859 if (!subsection)
2860 return -1;
2861 *subsection = var + 1;
2862 *subsection_len = dot - *subsection;
2863 }
2864
2865 return 0;
2866}
2867
2868const char *current_config_origin_type(void)
2869{
2870 int type;
2871 if (current_config_kvi)
2872 type = current_config_kvi->origin_type;
2873 else if(cf)
2874 type = cf->origin_type;
2875 else
2876 die("BUG: current_config_origin_type called outside config callback");
2877
2878 switch (type) {
2879 case CONFIG_ORIGIN_BLOB:
2880 return "blob";
2881 case CONFIG_ORIGIN_FILE:
2882 return "file";
2883 case CONFIG_ORIGIN_STDIN:
2884 return "standard input";
2885 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2886 return "submodule-blob";
2887 case CONFIG_ORIGIN_CMDLINE:
2888 return "command line";
2889 default:
2890 die("BUG: unknown config origin type");
2891 }
2892}
2893
2894const char *current_config_name(void)
2895{
2896 const char *name;
2897 if (current_config_kvi)
2898 name = current_config_kvi->filename;
2899 else if (cf)
2900 name = cf->name;
2901 else
2902 die("BUG: current_config_name called outside config callback");
2903 return name ? name : "";
2904}
2905
2906enum config_scope current_config_scope(void)
2907{
2908 if (current_config_kvi)
2909 return current_config_kvi->scope;
2910 else
2911 return current_parsing_scope;
2912}