submodule: convert submodule config lookup to use object_id
[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 "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
20 struct 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 */
60 static struct config_source *cf;
61 static 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 */
70 static enum config_scope current_parsing_scope;
71
72 static int core_compression_seen;
73 static int pack_compression_seen;
74 static int zlib_compression_seen;
75
76 static int config_file_fgetc(struct config_source *conf)
77 {
78 return getc_unlocked(conf->u.file);
79 }
80
81 static int config_file_ungetc(int c, struct config_source *conf)
82 {
83 return ungetc(c, conf->u.file);
84 }
85
86 static long config_file_ftell(struct config_source *conf)
87 {
88 return ftell(conf->u.file);
89 }
90
91
92 static 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
100 static 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
112 static long config_buf_ftell(struct config_source *conf)
113 {
114 return conf->u.buf.pos;
115 }
116
117 #define MAX_INCLUDE_DEPTH 10
118 static 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?";
124 static 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
169 static 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
205 static 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
223 again:
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 }
257 done:
258 strbuf_release(&pattern);
259 strbuf_release(&text);
260 return ret;
261 }
262
263 static 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
276 int 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
302 void 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
315 static 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 */
332 static 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
389 out_free_ret_1:
390 if (store_key) {
391 FREE_AND_NULL(*store_key);
392 }
393 return -CONFIG_INVALID_KEY;
394 }
395
396 int 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
401 int git_config_key_is_valid(const char *key)
402 {
403 return !git_config_parse_key_1(key, NULL, NULL, 1);
404 }
405
406 int 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
441 int 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
474 out:
475 free(argv);
476 free(envw);
477 cf = source.prev;
478 return ret;
479 }
480
481 static 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
504 static 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
565 static 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
604 static 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;
635 error_incomplete_line:
636 cf->linenr--;
637 return -1;
638 }
639
640 static 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
656 static 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
753 static 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
772 static 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
802 static 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
829 static 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
838 static 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
847 int 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
856 static 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
865 NORETURN
866 static 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
899 int 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
907 int64_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
915 unsigned 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
923 ssize_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
931 int 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
948 int 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
958 int 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
969 int 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
975 int 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
983 int 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
993 static 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
1248 static 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
1260 static 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
1290 static 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
1319 static 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
1330 int 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 */
1383 static 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
1405 static 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
1424 static 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
1429 int 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
1444 int 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
1463 int git_config_from_blob_oid(config_fn_t fn,
1464 const char *name,
1465 const struct object_id *oid,
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(oid->hash, &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
1487 static int git_config_from_blob_ref(config_fn_t fn,
1488 const char *name,
1489 void *data)
1490 {
1491 struct object_id oid;
1492
1493 if (get_oid(name, &oid) < 0)
1494 return error("unable to resolve config blob '%s'", name);
1495 return git_config_from_blob_oid(fn, name, &oid, data);
1496 }
1497
1498 const 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 */
1510 int 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 */
1520 unsigned 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
1528 int git_config_system(void)
1529 {
1530 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1531 }
1532
1533 static 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
1573 int 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
1601 static 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
1624 void 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
1654 static 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
1673 static 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
1717 static int config_set_element_cmp(const struct config_set_element *e1,
1718 const struct config_set_element *e2, const void *unused)
1719 {
1720 return strcmp(e1->key, e2->key);
1721 }
1722
1723 void git_configset_init(struct config_set *cs)
1724 {
1725 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1726 cs->hash_initialized = 1;
1727 cs->list.nr = 0;
1728 cs->list.alloc = 0;
1729 cs->list.items = NULL;
1730 }
1731
1732 void git_configset_clear(struct config_set *cs)
1733 {
1734 struct config_set_element *entry;
1735 struct hashmap_iter iter;
1736 if (!cs->hash_initialized)
1737 return;
1738
1739 hashmap_iter_init(&cs->config_hash, &iter);
1740 while ((entry = hashmap_iter_next(&iter))) {
1741 free(entry->key);
1742 string_list_clear(&entry->value_list, 1);
1743 }
1744 hashmap_free(&cs->config_hash, 1);
1745 cs->hash_initialized = 0;
1746 free(cs->list.items);
1747 cs->list.nr = 0;
1748 cs->list.alloc = 0;
1749 cs->list.items = NULL;
1750 }
1751
1752 static int config_set_callback(const char *key, const char *value, void *cb)
1753 {
1754 struct config_set *cs = cb;
1755 configset_add_value(cs, key, value);
1756 return 0;
1757 }
1758
1759 int git_configset_add_file(struct config_set *cs, const char *filename)
1760 {
1761 return git_config_from_file(config_set_callback, filename, cs);
1762 }
1763
1764 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1765 {
1766 const struct string_list *values = NULL;
1767 /*
1768 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1769 * queried key in the files of the configset, the value returned will be the last
1770 * value in the value list for that key.
1771 */
1772 values = git_configset_get_value_multi(cs, key);
1773
1774 if (!values)
1775 return 1;
1776 assert(values->nr > 0);
1777 *value = values->items[values->nr - 1].string;
1778 return 0;
1779 }
1780
1781 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1782 {
1783 struct config_set_element *e = configset_find_element(cs, key);
1784 return e ? &e->value_list : NULL;
1785 }
1786
1787 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1788 {
1789 const char *value;
1790 if (!git_configset_get_value(cs, key, &value))
1791 return git_config_string(dest, key, value);
1792 else
1793 return 1;
1794 }
1795
1796 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1797 {
1798 return git_configset_get_string_const(cs, key, (const char **)dest);
1799 }
1800
1801 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1802 {
1803 const char *value;
1804 if (!git_configset_get_value(cs, key, &value)) {
1805 *dest = git_config_int(key, value);
1806 return 0;
1807 } else
1808 return 1;
1809 }
1810
1811 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1812 {
1813 const char *value;
1814 if (!git_configset_get_value(cs, key, &value)) {
1815 *dest = git_config_ulong(key, value);
1816 return 0;
1817 } else
1818 return 1;
1819 }
1820
1821 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1822 {
1823 const char *value;
1824 if (!git_configset_get_value(cs, key, &value)) {
1825 *dest = git_config_bool(key, value);
1826 return 0;
1827 } else
1828 return 1;
1829 }
1830
1831 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1832 int *is_bool, int *dest)
1833 {
1834 const char *value;
1835 if (!git_configset_get_value(cs, key, &value)) {
1836 *dest = git_config_bool_or_int(key, value, is_bool);
1837 return 0;
1838 } else
1839 return 1;
1840 }
1841
1842 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1843 {
1844 const char *value;
1845 if (!git_configset_get_value(cs, key, &value)) {
1846 *dest = git_config_maybe_bool(key, value);
1847 if (*dest == -1)
1848 return -1;
1849 return 0;
1850 } else
1851 return 1;
1852 }
1853
1854 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1855 {
1856 const char *value;
1857 if (!git_configset_get_value(cs, key, &value))
1858 return git_config_pathname(dest, key, value);
1859 else
1860 return 1;
1861 }
1862
1863 /* Functions use to read configuration from a repository */
1864 static void repo_read_config(struct repository *repo)
1865 {
1866 struct config_options opts;
1867
1868 opts.respect_includes = 1;
1869 opts.commondir = repo->commondir;
1870 opts.git_dir = repo->gitdir;
1871
1872 if (!repo->config)
1873 repo->config = xcalloc(1, sizeof(struct config_set));
1874 else
1875 git_configset_clear(repo->config);
1876
1877 git_configset_init(repo->config);
1878
1879 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1880 /*
1881 * config_with_options() normally returns only
1882 * zero, as most errors are fatal, and
1883 * non-fatal potential errors are guarded by "if"
1884 * statements that are entered only when no error is
1885 * possible.
1886 *
1887 * If we ever encounter a non-fatal error, it means
1888 * something went really wrong and we should stop
1889 * immediately.
1890 */
1891 die(_("unknown error occurred while reading the configuration files"));
1892 }
1893
1894 static void git_config_check_init(struct repository *repo)
1895 {
1896 if (repo->config && repo->config->hash_initialized)
1897 return;
1898 repo_read_config(repo);
1899 }
1900
1901 static void repo_config_clear(struct repository *repo)
1902 {
1903 if (!repo->config || !repo->config->hash_initialized)
1904 return;
1905 git_configset_clear(repo->config);
1906 }
1907
1908 void repo_config(struct repository *repo, config_fn_t fn, void *data)
1909 {
1910 git_config_check_init(repo);
1911 configset_iter(repo->config, fn, data);
1912 }
1913
1914 int repo_config_get_value(struct repository *repo,
1915 const char *key, const char **value)
1916 {
1917 git_config_check_init(repo);
1918 return git_configset_get_value(repo->config, key, value);
1919 }
1920
1921 const struct string_list *repo_config_get_value_multi(struct repository *repo,
1922 const char *key)
1923 {
1924 git_config_check_init(repo);
1925 return git_configset_get_value_multi(repo->config, key);
1926 }
1927
1928 int repo_config_get_string_const(struct repository *repo,
1929 const char *key, const char **dest)
1930 {
1931 int ret;
1932 git_config_check_init(repo);
1933 ret = git_configset_get_string_const(repo->config, key, dest);
1934 if (ret < 0)
1935 git_die_config(key, NULL);
1936 return ret;
1937 }
1938
1939 int repo_config_get_string(struct repository *repo,
1940 const char *key, char **dest)
1941 {
1942 git_config_check_init(repo);
1943 return repo_config_get_string_const(repo, key, (const char **)dest);
1944 }
1945
1946 int repo_config_get_int(struct repository *repo,
1947 const char *key, int *dest)
1948 {
1949 git_config_check_init(repo);
1950 return git_configset_get_int(repo->config, key, dest);
1951 }
1952
1953 int repo_config_get_ulong(struct repository *repo,
1954 const char *key, unsigned long *dest)
1955 {
1956 git_config_check_init(repo);
1957 return git_configset_get_ulong(repo->config, key, dest);
1958 }
1959
1960 int repo_config_get_bool(struct repository *repo,
1961 const char *key, int *dest)
1962 {
1963 git_config_check_init(repo);
1964 return git_configset_get_bool(repo->config, key, dest);
1965 }
1966
1967 int repo_config_get_bool_or_int(struct repository *repo,
1968 const char *key, int *is_bool, int *dest)
1969 {
1970 git_config_check_init(repo);
1971 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
1972 }
1973
1974 int repo_config_get_maybe_bool(struct repository *repo,
1975 const char *key, int *dest)
1976 {
1977 git_config_check_init(repo);
1978 return git_configset_get_maybe_bool(repo->config, key, dest);
1979 }
1980
1981 int repo_config_get_pathname(struct repository *repo,
1982 const char *key, const char **dest)
1983 {
1984 int ret;
1985 git_config_check_init(repo);
1986 ret = git_configset_get_pathname(repo->config, key, dest);
1987 if (ret < 0)
1988 git_die_config(key, NULL);
1989 return ret;
1990 }
1991
1992 /* Functions used historically to read configuration from 'the_repository' */
1993 void git_config(config_fn_t fn, void *data)
1994 {
1995 repo_config(the_repository, fn, data);
1996 }
1997
1998 void git_config_clear(void)
1999 {
2000 repo_config_clear(the_repository);
2001 }
2002
2003 int git_config_get_value(const char *key, const char **value)
2004 {
2005 return repo_config_get_value(the_repository, key, value);
2006 }
2007
2008 const struct string_list *git_config_get_value_multi(const char *key)
2009 {
2010 return repo_config_get_value_multi(the_repository, key);
2011 }
2012
2013 int git_config_get_string_const(const char *key, const char **dest)
2014 {
2015 return repo_config_get_string_const(the_repository, key, dest);
2016 }
2017
2018 int git_config_get_string(const char *key, char **dest)
2019 {
2020 return repo_config_get_string(the_repository, key, dest);
2021 }
2022
2023 int git_config_get_int(const char *key, int *dest)
2024 {
2025 return repo_config_get_int(the_repository, key, dest);
2026 }
2027
2028 int git_config_get_ulong(const char *key, unsigned long *dest)
2029 {
2030 return repo_config_get_ulong(the_repository, key, dest);
2031 }
2032
2033 int git_config_get_bool(const char *key, int *dest)
2034 {
2035 return repo_config_get_bool(the_repository, key, dest);
2036 }
2037
2038 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2039 {
2040 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2041 }
2042
2043 int git_config_get_maybe_bool(const char *key, int *dest)
2044 {
2045 return repo_config_get_maybe_bool(the_repository, key, dest);
2046 }
2047
2048 int git_config_get_pathname(const char *key, const char **dest)
2049 {
2050 return repo_config_get_pathname(the_repository, key, dest);
2051 }
2052
2053 int git_config_get_expiry(const char *key, const char **output)
2054 {
2055 int ret = git_config_get_string_const(key, output);
2056 if (ret)
2057 return ret;
2058 if (strcmp(*output, "now")) {
2059 timestamp_t now = approxidate("now");
2060 if (approxidate(*output) >= now)
2061 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2062 }
2063 return ret;
2064 }
2065
2066 int git_config_get_untracked_cache(void)
2067 {
2068 int val = -1;
2069 const char *v;
2070
2071 /* Hack for test programs like test-dump-untracked-cache */
2072 if (ignore_untracked_cache_config)
2073 return -1;
2074
2075 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2076 return val;
2077
2078 if (!git_config_get_value("core.untrackedcache", &v)) {
2079 if (!strcasecmp(v, "keep"))
2080 return -1;
2081
2082 error(_("unknown core.untrackedCache value '%s'; "
2083 "using 'keep' default value"), v);
2084 return -1;
2085 }
2086
2087 return -1; /* default value */
2088 }
2089
2090 int git_config_get_split_index(void)
2091 {
2092 int val;
2093
2094 if (!git_config_get_maybe_bool("core.splitindex", &val))
2095 return val;
2096
2097 return -1; /* default value */
2098 }
2099
2100 int git_config_get_max_percent_split_change(void)
2101 {
2102 int val = -1;
2103
2104 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2105 if (0 <= val && val <= 100)
2106 return val;
2107
2108 return error(_("splitIndex.maxPercentChange value '%d' "
2109 "should be between 0 and 100"), val);
2110 }
2111
2112 return -1; /* default value */
2113 }
2114
2115 NORETURN
2116 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2117 {
2118 if (!filename)
2119 die(_("unable to parse '%s' from command-line config"), key);
2120 else
2121 die(_("bad config variable '%s' in file '%s' at line %d"),
2122 key, filename, linenr);
2123 }
2124
2125 NORETURN __attribute__((format(printf, 2, 3)))
2126 void git_die_config(const char *key, const char *err, ...)
2127 {
2128 const struct string_list *values;
2129 struct key_value_info *kv_info;
2130
2131 if (err) {
2132 va_list params;
2133 va_start(params, err);
2134 vreportf("error: ", err, params);
2135 va_end(params);
2136 }
2137 values = git_config_get_value_multi(key);
2138 kv_info = values->items[values->nr - 1].util;
2139 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2140 }
2141
2142 /*
2143 * Find all the stuff for git_config_set() below.
2144 */
2145
2146 static struct {
2147 int baselen;
2148 char *key;
2149 int do_not_match;
2150 regex_t *value_regex;
2151 int multi_replace;
2152 size_t *offset;
2153 unsigned int offset_alloc;
2154 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2155 int seen;
2156 } store;
2157
2158 static int matches(const char *key, const char *value)
2159 {
2160 if (strcmp(key, store.key))
2161 return 0; /* not ours */
2162 if (!store.value_regex)
2163 return 1; /* always matches */
2164 if (store.value_regex == CONFIG_REGEX_NONE)
2165 return 0; /* never matches */
2166
2167 return store.do_not_match ^
2168 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2169 }
2170
2171 static int store_aux(const char *key, const char *value, void *cb)
2172 {
2173 const char *ep;
2174 size_t section_len;
2175
2176 switch (store.state) {
2177 case KEY_SEEN:
2178 if (matches(key, value)) {
2179 if (store.seen == 1 && store.multi_replace == 0) {
2180 warning(_("%s has multiple values"), key);
2181 }
2182
2183 ALLOC_GROW(store.offset, store.seen + 1,
2184 store.offset_alloc);
2185
2186 store.offset[store.seen] = cf->do_ftell(cf);
2187 store.seen++;
2188 }
2189 break;
2190 case SECTION_SEEN:
2191 /*
2192 * What we are looking for is in store.key (both
2193 * section and var), and its section part is baselen
2194 * long. We found key (again, both section and var).
2195 * We would want to know if this key is in the same
2196 * section as what we are looking for. We already
2197 * know we are in the same section as what should
2198 * hold store.key.
2199 */
2200 ep = strrchr(key, '.');
2201 section_len = ep - key;
2202
2203 if ((section_len != store.baselen) ||
2204 memcmp(key, store.key, section_len+1)) {
2205 store.state = SECTION_END_SEEN;
2206 break;
2207 }
2208
2209 /*
2210 * Do not increment matches: this is no match, but we
2211 * just made sure we are in the desired section.
2212 */
2213 ALLOC_GROW(store.offset, store.seen + 1,
2214 store.offset_alloc);
2215 store.offset[store.seen] = cf->do_ftell(cf);
2216 /* fallthru */
2217 case SECTION_END_SEEN:
2218 case START:
2219 if (matches(key, value)) {
2220 ALLOC_GROW(store.offset, store.seen + 1,
2221 store.offset_alloc);
2222 store.offset[store.seen] = cf->do_ftell(cf);
2223 store.state = KEY_SEEN;
2224 store.seen++;
2225 } else {
2226 if (strrchr(key, '.') - key == store.baselen &&
2227 !strncmp(key, store.key, store.baselen)) {
2228 store.state = SECTION_SEEN;
2229 ALLOC_GROW(store.offset,
2230 store.seen + 1,
2231 store.offset_alloc);
2232 store.offset[store.seen] = cf->do_ftell(cf);
2233 }
2234 }
2235 }
2236 return 0;
2237 }
2238
2239 static int write_error(const char *filename)
2240 {
2241 error("failed to write new configuration file %s", filename);
2242
2243 /* Same error code as "failed to rename". */
2244 return 4;
2245 }
2246
2247 static int store_write_section(int fd, const char *key)
2248 {
2249 const char *dot;
2250 int i, success;
2251 struct strbuf sb = STRBUF_INIT;
2252
2253 dot = memchr(key, '.', store.baselen);
2254 if (dot) {
2255 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2256 for (i = dot - key + 1; i < store.baselen; i++) {
2257 if (key[i] == '"' || key[i] == '\\')
2258 strbuf_addch(&sb, '\\');
2259 strbuf_addch(&sb, key[i]);
2260 }
2261 strbuf_addstr(&sb, "\"]\n");
2262 } else {
2263 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2264 }
2265
2266 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2267 strbuf_release(&sb);
2268
2269 return success;
2270 }
2271
2272 static int store_write_pair(int fd, const char *key, const char *value)
2273 {
2274 int i, success;
2275 int length = strlen(key + store.baselen + 1);
2276 const char *quote = "";
2277 struct strbuf sb = STRBUF_INIT;
2278
2279 /*
2280 * Check to see if the value needs to be surrounded with a dq pair.
2281 * Note that problematic characters are always backslash-quoted; this
2282 * check is about not losing leading or trailing SP and strings that
2283 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2284 * configuration parser.
2285 */
2286 if (value[0] == ' ')
2287 quote = "\"";
2288 for (i = 0; value[i]; i++)
2289 if (value[i] == ';' || value[i] == '#')
2290 quote = "\"";
2291 if (i && value[i - 1] == ' ')
2292 quote = "\"";
2293
2294 strbuf_addf(&sb, "\t%.*s = %s",
2295 length, key + store.baselen + 1, quote);
2296
2297 for (i = 0; value[i]; i++)
2298 switch (value[i]) {
2299 case '\n':
2300 strbuf_addstr(&sb, "\\n");
2301 break;
2302 case '\t':
2303 strbuf_addstr(&sb, "\\t");
2304 break;
2305 case '"':
2306 case '\\':
2307 strbuf_addch(&sb, '\\');
2308 default:
2309 strbuf_addch(&sb, value[i]);
2310 break;
2311 }
2312 strbuf_addf(&sb, "%s\n", quote);
2313
2314 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2315 strbuf_release(&sb);
2316
2317 return success;
2318 }
2319
2320 static ssize_t find_beginning_of_line(const char *contents, size_t size,
2321 size_t offset_, int *found_bracket)
2322 {
2323 size_t equal_offset = size, bracket_offset = size;
2324 ssize_t offset;
2325
2326 contline:
2327 for (offset = offset_-2; offset > 0
2328 && contents[offset] != '\n'; offset--)
2329 switch (contents[offset]) {
2330 case '=': equal_offset = offset; break;
2331 case ']': bracket_offset = offset; break;
2332 }
2333 if (offset > 0 && contents[offset-1] == '\\') {
2334 offset_ = offset;
2335 goto contline;
2336 }
2337 if (bracket_offset < equal_offset) {
2338 *found_bracket = 1;
2339 offset = bracket_offset+1;
2340 } else
2341 offset++;
2342
2343 return offset;
2344 }
2345
2346 int git_config_set_in_file_gently(const char *config_filename,
2347 const char *key, const char *value)
2348 {
2349 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2350 }
2351
2352 void git_config_set_in_file(const char *config_filename,
2353 const char *key, const char *value)
2354 {
2355 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2356 }
2357
2358 int git_config_set_gently(const char *key, const char *value)
2359 {
2360 return git_config_set_multivar_gently(key, value, NULL, 0);
2361 }
2362
2363 void git_config_set(const char *key, const char *value)
2364 {
2365 git_config_set_multivar(key, value, NULL, 0);
2366 }
2367
2368 /*
2369 * If value==NULL, unset in (remove from) config,
2370 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2371 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2372 * (only add a new one)
2373 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2374 * else all matching key/values (regardless how many) are removed,
2375 * before the new pair is written.
2376 *
2377 * Returns 0 on success.
2378 *
2379 * This function does this:
2380 *
2381 * - it locks the config file by creating ".git/config.lock"
2382 *
2383 * - it then parses the config using store_aux() as validator to find
2384 * the position on the key/value pair to replace. If it is to be unset,
2385 * it must be found exactly once.
2386 *
2387 * - the config file is mmap()ed and the part before the match (if any) is
2388 * written to the lock file, then the changed part and the rest.
2389 *
2390 * - the config file is removed and the lock file rename()d to it.
2391 *
2392 */
2393 int git_config_set_multivar_in_file_gently(const char *config_filename,
2394 const char *key, const char *value,
2395 const char *value_regex,
2396 int multi_replace)
2397 {
2398 int fd = -1, in_fd = -1;
2399 int ret;
2400 struct lock_file *lock = NULL;
2401 char *filename_buf = NULL;
2402 char *contents = NULL;
2403 size_t contents_sz;
2404
2405 /* parse-key returns negative; flip the sign to feed exit(3) */
2406 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2407 if (ret)
2408 goto out_free;
2409
2410 store.multi_replace = multi_replace;
2411
2412 if (!config_filename)
2413 config_filename = filename_buf = git_pathdup("config");
2414
2415 /*
2416 * The lock serves a purpose in addition to locking: the new
2417 * contents of .git/config will be written into it.
2418 */
2419 lock = xcalloc(1, sizeof(struct lock_file));
2420 fd = hold_lock_file_for_update(lock, config_filename, 0);
2421 if (fd < 0) {
2422 error_errno("could not lock config file %s", config_filename);
2423 free(store.key);
2424 ret = CONFIG_NO_LOCK;
2425 goto out_free;
2426 }
2427
2428 /*
2429 * If .git/config does not exist yet, write a minimal version.
2430 */
2431 in_fd = open(config_filename, O_RDONLY);
2432 if ( in_fd < 0 ) {
2433 free(store.key);
2434
2435 if ( ENOENT != errno ) {
2436 error_errno("opening %s", config_filename);
2437 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2438 goto out_free;
2439 }
2440 /* if nothing to unset, error out */
2441 if (value == NULL) {
2442 ret = CONFIG_NOTHING_SET;
2443 goto out_free;
2444 }
2445
2446 store.key = (char *)key;
2447 if (!store_write_section(fd, key) ||
2448 !store_write_pair(fd, key, value))
2449 goto write_err_out;
2450 } else {
2451 struct stat st;
2452 size_t copy_begin, copy_end;
2453 int i, new_line = 0;
2454
2455 if (value_regex == NULL)
2456 store.value_regex = NULL;
2457 else if (value_regex == CONFIG_REGEX_NONE)
2458 store.value_regex = CONFIG_REGEX_NONE;
2459 else {
2460 if (value_regex[0] == '!') {
2461 store.do_not_match = 1;
2462 value_regex++;
2463 } else
2464 store.do_not_match = 0;
2465
2466 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2467 if (regcomp(store.value_regex, value_regex,
2468 REG_EXTENDED)) {
2469 error("invalid pattern: %s", value_regex);
2470 free(store.value_regex);
2471 ret = CONFIG_INVALID_PATTERN;
2472 goto out_free;
2473 }
2474 }
2475
2476 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2477 store.offset[0] = 0;
2478 store.state = START;
2479 store.seen = 0;
2480
2481 /*
2482 * After this, store.offset will contain the *end* offset
2483 * of the last match, or remain at 0 if no match was found.
2484 * As a side effect, we make sure to transform only a valid
2485 * existing config file.
2486 */
2487 if (git_config_from_file(store_aux, config_filename, NULL)) {
2488 error("invalid config file %s", config_filename);
2489 free(store.key);
2490 if (store.value_regex != NULL &&
2491 store.value_regex != CONFIG_REGEX_NONE) {
2492 regfree(store.value_regex);
2493 free(store.value_regex);
2494 }
2495 ret = CONFIG_INVALID_FILE;
2496 goto out_free;
2497 }
2498
2499 free(store.key);
2500 if (store.value_regex != NULL &&
2501 store.value_regex != CONFIG_REGEX_NONE) {
2502 regfree(store.value_regex);
2503 free(store.value_regex);
2504 }
2505
2506 /* if nothing to unset, or too many matches, error out */
2507 if ((store.seen == 0 && value == NULL) ||
2508 (store.seen > 1 && multi_replace == 0)) {
2509 ret = CONFIG_NOTHING_SET;
2510 goto out_free;
2511 }
2512
2513 if (fstat(in_fd, &st) == -1) {
2514 error_errno(_("fstat on %s failed"), config_filename);
2515 ret = CONFIG_INVALID_FILE;
2516 goto out_free;
2517 }
2518
2519 contents_sz = xsize_t(st.st_size);
2520 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2521 MAP_PRIVATE, in_fd, 0);
2522 if (contents == MAP_FAILED) {
2523 if (errno == ENODEV && S_ISDIR(st.st_mode))
2524 errno = EISDIR;
2525 error_errno("unable to mmap '%s'", config_filename);
2526 ret = CONFIG_INVALID_FILE;
2527 contents = NULL;
2528 goto out_free;
2529 }
2530 close(in_fd);
2531 in_fd = -1;
2532
2533 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2534 error_errno("chmod on %s failed", get_lock_file_path(lock));
2535 ret = CONFIG_NO_WRITE;
2536 goto out_free;
2537 }
2538
2539 if (store.seen == 0)
2540 store.seen = 1;
2541
2542 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2543 if (store.offset[i] == 0) {
2544 store.offset[i] = copy_end = contents_sz;
2545 } else if (store.state != KEY_SEEN) {
2546 copy_end = store.offset[i];
2547 } else
2548 copy_end = find_beginning_of_line(
2549 contents, contents_sz,
2550 store.offset[i]-2, &new_line);
2551
2552 if (copy_end > 0 && contents[copy_end-1] != '\n')
2553 new_line = 1;
2554
2555 /* write the first part of the config */
2556 if (copy_end > copy_begin) {
2557 if (write_in_full(fd, contents + copy_begin,
2558 copy_end - copy_begin) <
2559 copy_end - copy_begin)
2560 goto write_err_out;
2561 if (new_line &&
2562 write_str_in_full(fd, "\n") != 1)
2563 goto write_err_out;
2564 }
2565 copy_begin = store.offset[i];
2566 }
2567
2568 /* write the pair (value == NULL means unset) */
2569 if (value != NULL) {
2570 if (store.state == START) {
2571 if (!store_write_section(fd, key))
2572 goto write_err_out;
2573 }
2574 if (!store_write_pair(fd, key, value))
2575 goto write_err_out;
2576 }
2577
2578 /* write the rest of the config */
2579 if (copy_begin < contents_sz)
2580 if (write_in_full(fd, contents + copy_begin,
2581 contents_sz - copy_begin) <
2582 contents_sz - copy_begin)
2583 goto write_err_out;
2584
2585 munmap(contents, contents_sz);
2586 contents = NULL;
2587 }
2588
2589 if (commit_lock_file(lock) < 0) {
2590 error_errno("could not write config file %s", config_filename);
2591 ret = CONFIG_NO_WRITE;
2592 lock = NULL;
2593 goto out_free;
2594 }
2595
2596 /*
2597 * lock is committed, so don't try to roll it back below.
2598 * NOTE: Since lockfile.c keeps a linked list of all created
2599 * lock_file structures, it isn't safe to free(lock). It's
2600 * better to just leave it hanging around.
2601 */
2602 lock = NULL;
2603 ret = 0;
2604
2605 /* Invalidate the config cache */
2606 git_config_clear();
2607
2608 out_free:
2609 if (lock)
2610 rollback_lock_file(lock);
2611 free(filename_buf);
2612 if (contents)
2613 munmap(contents, contents_sz);
2614 if (in_fd >= 0)
2615 close(in_fd);
2616 return ret;
2617
2618 write_err_out:
2619 ret = write_error(get_lock_file_path(lock));
2620 goto out_free;
2621
2622 }
2623
2624 void git_config_set_multivar_in_file(const char *config_filename,
2625 const char *key, const char *value,
2626 const char *value_regex, int multi_replace)
2627 {
2628 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2629 value_regex, multi_replace))
2630 return;
2631 if (value)
2632 die(_("could not set '%s' to '%s'"), key, value);
2633 else
2634 die(_("could not unset '%s'"), key);
2635 }
2636
2637 int git_config_set_multivar_gently(const char *key, const char *value,
2638 const char *value_regex, int multi_replace)
2639 {
2640 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2641 multi_replace);
2642 }
2643
2644 void git_config_set_multivar(const char *key, const char *value,
2645 const char *value_regex, int multi_replace)
2646 {
2647 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2648 multi_replace);
2649 }
2650
2651 static int section_name_match (const char *buf, const char *name)
2652 {
2653 int i = 0, j = 0, dot = 0;
2654 if (buf[i] != '[')
2655 return 0;
2656 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2657 if (!dot && isspace(buf[i])) {
2658 dot = 1;
2659 if (name[j++] != '.')
2660 break;
2661 for (i++; isspace(buf[i]); i++)
2662 ; /* do nothing */
2663 if (buf[i] != '"')
2664 break;
2665 continue;
2666 }
2667 if (buf[i] == '\\' && dot)
2668 i++;
2669 else if (buf[i] == '"' && dot) {
2670 for (i++; isspace(buf[i]); i++)
2671 ; /* do_nothing */
2672 break;
2673 }
2674 if (buf[i] != name[j++])
2675 break;
2676 }
2677 if (buf[i] == ']' && name[j] == 0) {
2678 /*
2679 * We match, now just find the right length offset by
2680 * gobbling up any whitespace after it, as well
2681 */
2682 i++;
2683 for (; buf[i] && isspace(buf[i]); i++)
2684 ; /* do nothing */
2685 return i;
2686 }
2687 return 0;
2688 }
2689
2690 static int section_name_is_ok(const char *name)
2691 {
2692 /* Empty section names are bogus. */
2693 if (!*name)
2694 return 0;
2695
2696 /*
2697 * Before a dot, we must be alphanumeric or dash. After the first dot,
2698 * anything goes, so we can stop checking.
2699 */
2700 for (; *name && *name != '.'; name++)
2701 if (*name != '-' && !isalnum(*name))
2702 return 0;
2703 return 1;
2704 }
2705
2706 /* if new_name == NULL, the section is removed instead */
2707 int git_config_rename_section_in_file(const char *config_filename,
2708 const char *old_name, const char *new_name)
2709 {
2710 int ret = 0, remove = 0;
2711 char *filename_buf = NULL;
2712 struct lock_file *lock;
2713 int out_fd;
2714 char buf[1024];
2715 FILE *config_file = NULL;
2716 struct stat st;
2717
2718 if (new_name && !section_name_is_ok(new_name)) {
2719 ret = error("invalid section name: %s", new_name);
2720 goto out_no_rollback;
2721 }
2722
2723 if (!config_filename)
2724 config_filename = filename_buf = git_pathdup("config");
2725
2726 lock = xcalloc(1, sizeof(struct lock_file));
2727 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2728 if (out_fd < 0) {
2729 ret = error("could not lock config file %s", config_filename);
2730 goto out;
2731 }
2732
2733 if (!(config_file = fopen(config_filename, "rb"))) {
2734 ret = warn_on_fopen_errors(config_filename);
2735 if (ret)
2736 goto out;
2737 /* no config file means nothing to rename, no error */
2738 goto commit_and_out;
2739 }
2740
2741 if (fstat(fileno(config_file), &st) == -1) {
2742 ret = error_errno(_("fstat on %s failed"), config_filename);
2743 goto out;
2744 }
2745
2746 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2747 ret = error_errno("chmod on %s failed",
2748 get_lock_file_path(lock));
2749 goto out;
2750 }
2751
2752 while (fgets(buf, sizeof(buf), config_file)) {
2753 int i;
2754 int length;
2755 char *output = buf;
2756 for (i = 0; buf[i] && isspace(buf[i]); i++)
2757 ; /* do nothing */
2758 if (buf[i] == '[') {
2759 /* it's a section */
2760 int offset = section_name_match(&buf[i], old_name);
2761 if (offset > 0) {
2762 ret++;
2763 if (new_name == NULL) {
2764 remove = 1;
2765 continue;
2766 }
2767 store.baselen = strlen(new_name);
2768 if (!store_write_section(out_fd, new_name)) {
2769 ret = write_error(get_lock_file_path(lock));
2770 goto out;
2771 }
2772 /*
2773 * We wrote out the new section, with
2774 * a newline, now skip the old
2775 * section's length
2776 */
2777 output += offset + i;
2778 if (strlen(output) > 0) {
2779 /*
2780 * More content means there's
2781 * a declaration to put on the
2782 * next line; indent with a
2783 * tab
2784 */
2785 output -= 1;
2786 output[0] = '\t';
2787 }
2788 }
2789 remove = 0;
2790 }
2791 if (remove)
2792 continue;
2793 length = strlen(output);
2794 if (write_in_full(out_fd, output, length) != length) {
2795 ret = write_error(get_lock_file_path(lock));
2796 goto out;
2797 }
2798 }
2799 fclose(config_file);
2800 config_file = NULL;
2801 commit_and_out:
2802 if (commit_lock_file(lock) < 0)
2803 ret = error_errno("could not write config file %s",
2804 config_filename);
2805 out:
2806 if (config_file)
2807 fclose(config_file);
2808 rollback_lock_file(lock);
2809 out_no_rollback:
2810 free(filename_buf);
2811 return ret;
2812 }
2813
2814 int git_config_rename_section(const char *old_name, const char *new_name)
2815 {
2816 return git_config_rename_section_in_file(NULL, old_name, new_name);
2817 }
2818
2819 /*
2820 * Call this to report error for your variable that should not
2821 * get a boolean value (i.e. "[my] var" means "true").
2822 */
2823 #undef config_error_nonbool
2824 int config_error_nonbool(const char *var)
2825 {
2826 return error("missing value for '%s'", var);
2827 }
2828
2829 int parse_config_key(const char *var,
2830 const char *section,
2831 const char **subsection, int *subsection_len,
2832 const char **key)
2833 {
2834 const char *dot;
2835
2836 /* Does it start with "section." ? */
2837 if (!skip_prefix(var, section, &var) || *var != '.')
2838 return -1;
2839
2840 /*
2841 * Find the key; we don't know yet if we have a subsection, but we must
2842 * parse backwards from the end, since the subsection may have dots in
2843 * it, too.
2844 */
2845 dot = strrchr(var, '.');
2846 *key = dot + 1;
2847
2848 /* Did we have a subsection at all? */
2849 if (dot == var) {
2850 if (subsection) {
2851 *subsection = NULL;
2852 *subsection_len = 0;
2853 }
2854 }
2855 else {
2856 if (!subsection)
2857 return -1;
2858 *subsection = var + 1;
2859 *subsection_len = dot - *subsection;
2860 }
2861
2862 return 0;
2863 }
2864
2865 const char *current_config_origin_type(void)
2866 {
2867 int type;
2868 if (current_config_kvi)
2869 type = current_config_kvi->origin_type;
2870 else if(cf)
2871 type = cf->origin_type;
2872 else
2873 die("BUG: current_config_origin_type called outside config callback");
2874
2875 switch (type) {
2876 case CONFIG_ORIGIN_BLOB:
2877 return "blob";
2878 case CONFIG_ORIGIN_FILE:
2879 return "file";
2880 case CONFIG_ORIGIN_STDIN:
2881 return "standard input";
2882 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2883 return "submodule-blob";
2884 case CONFIG_ORIGIN_CMDLINE:
2885 return "command line";
2886 default:
2887 die("BUG: unknown config origin type");
2888 }
2889 }
2890
2891 const char *current_config_name(void)
2892 {
2893 const char *name;
2894 if (current_config_kvi)
2895 name = current_config_kvi->filename;
2896 else if (cf)
2897 name = cf->name;
2898 else
2899 die("BUG: current_config_name called outside config callback");
2900 return name ? name : "";
2901 }
2902
2903 enum config_scope current_config_scope(void)
2904 {
2905 if (current_config_kvi)
2906 return current_config_kvi->scope;
2907 else
2908 return current_parsing_scope;
2909 }