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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 "branch.h"
10 #include "config.h"
11 #include "environment.h"
12 #include "repository.h"
13 #include "lockfile.h"
14 #include "exec-cmd.h"
15 #include "strbuf.h"
16 #include "quote.h"
17 #include "hashmap.h"
18 #include "string-list.h"
19 #include "object-store.h"
20 #include "utf8.h"
21 #include "dir.h"
22 #include "color.h"
23 #include "refs.h"
24
25 struct config_source {
26 struct config_source *prev;
27 union {
28 FILE *file;
29 struct config_buf {
30 const char *buf;
31 size_t len;
32 size_t pos;
33 } buf;
34 } u;
35 enum config_origin_type origin_type;
36 const char *name;
37 const char *path;
38 enum config_error_action default_error_action;
39 int linenr;
40 int eof;
41 size_t total_len;
42 struct strbuf value;
43 struct strbuf var;
44 unsigned subsection_case_sensitive : 1;
45
46 int (*do_fgetc)(struct config_source *c);
47 int (*do_ungetc)(int c, struct config_source *conf);
48 long (*do_ftell)(struct config_source *c);
49 };
50
51 /*
52 * These variables record the "current" config source, which
53 * can be accessed by parsing callbacks.
54 *
55 * The "cf" variable will be non-NULL only when we are actually parsing a real
56 * config source (file, blob, cmdline, etc).
57 *
58 * The "current_config_kvi" variable will be non-NULL only when we are feeding
59 * cached config from a configset into a callback.
60 *
61 * They should generally never be non-NULL at the same time. If they are both
62 * NULL, then we aren't parsing anything (and depending on the function looking
63 * at the variables, it's either a bug for it to be called in the first place,
64 * or it's a function which can be reused for non-config purposes, and should
65 * fall back to some sane behavior).
66 */
67 static struct config_source *cf;
68 static struct key_value_info *current_config_kvi;
69
70 /*
71 * Similar to the variables above, this gives access to the "scope" of the
72 * current value (repo, global, etc). For cached values, it can be found via
73 * the current_config_kvi as above. During parsing, the current value can be
74 * found in this variable. It's not part of "cf" because it transcends a single
75 * file (i.e., a file included from .git/config is still in "repo" scope).
76 */
77 static enum config_scope current_parsing_scope;
78
79 static int core_compression_seen;
80 static int pack_compression_seen;
81 static int zlib_compression_seen;
82
83 static int config_file_fgetc(struct config_source *conf)
84 {
85 return getc_unlocked(conf->u.file);
86 }
87
88 static int config_file_ungetc(int c, struct config_source *conf)
89 {
90 return ungetc(c, conf->u.file);
91 }
92
93 static long config_file_ftell(struct config_source *conf)
94 {
95 return ftell(conf->u.file);
96 }
97
98
99 static int config_buf_fgetc(struct config_source *conf)
100 {
101 if (conf->u.buf.pos < conf->u.buf.len)
102 return conf->u.buf.buf[conf->u.buf.pos++];
103
104 return EOF;
105 }
106
107 static int config_buf_ungetc(int c, struct config_source *conf)
108 {
109 if (conf->u.buf.pos > 0) {
110 conf->u.buf.pos--;
111 if (conf->u.buf.buf[conf->u.buf.pos] != c)
112 BUG("config_buf can only ungetc the same character");
113 return c;
114 }
115
116 return EOF;
117 }
118
119 static long config_buf_ftell(struct config_source *conf)
120 {
121 return conf->u.buf.pos;
122 }
123
124 #define MAX_INCLUDE_DEPTH 10
125 static const char include_depth_advice[] = N_(
126 "exceeded maximum include depth (%d) while including\n"
127 " %s\n"
128 "from\n"
129 " %s\n"
130 "This might be due to circular includes.");
131 static int handle_path_include(const char *path, struct config_include_data *inc)
132 {
133 int ret = 0;
134 struct strbuf buf = STRBUF_INIT;
135 char *expanded;
136
137 if (!path)
138 return config_error_nonbool("include.path");
139
140 expanded = interpolate_path(path, 0);
141 if (!expanded)
142 return error(_("could not expand include path '%s'"), path);
143 path = expanded;
144
145 /*
146 * Use an absolute path as-is, but interpret relative paths
147 * based on the including config file.
148 */
149 if (!is_absolute_path(path)) {
150 char *slash;
151
152 if (!cf || !cf->path)
153 return error(_("relative config includes must come from files"));
154
155 slash = find_last_dir_sep(cf->path);
156 if (slash)
157 strbuf_add(&buf, cf->path, slash - cf->path + 1);
158 strbuf_addstr(&buf, path);
159 path = buf.buf;
160 }
161
162 if (!access_or_die(path, R_OK, 0)) {
163 if (++inc->depth > MAX_INCLUDE_DEPTH)
164 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
165 !cf ? "<unknown>" :
166 cf->name ? cf->name :
167 "the command line");
168 ret = git_config_from_file(git_config_include, path, inc);
169 inc->depth--;
170 }
171 strbuf_release(&buf);
172 free(expanded);
173 return ret;
174 }
175
176 static void add_trailing_starstar_for_dir(struct strbuf *pat)
177 {
178 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
179 strbuf_addstr(pat, "**");
180 }
181
182 static int prepare_include_condition_pattern(struct strbuf *pat)
183 {
184 struct strbuf path = STRBUF_INIT;
185 char *expanded;
186 int prefix = 0;
187
188 expanded = interpolate_path(pat->buf, 1);
189 if (expanded) {
190 strbuf_reset(pat);
191 strbuf_addstr(pat, expanded);
192 free(expanded);
193 }
194
195 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
196 const char *slash;
197
198 if (!cf || !cf->path)
199 return error(_("relative config include "
200 "conditionals must come from files"));
201
202 strbuf_realpath(&path, cf->path, 1);
203 slash = find_last_dir_sep(path.buf);
204 if (!slash)
205 BUG("how is this possible?");
206 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
207 prefix = slash - path.buf + 1 /* slash */;
208 } else if (!is_absolute_path(pat->buf))
209 strbuf_insertstr(pat, 0, "**/");
210
211 add_trailing_starstar_for_dir(pat);
212
213 strbuf_release(&path);
214 return prefix;
215 }
216
217 static int include_by_gitdir(const struct config_options *opts,
218 const char *cond, size_t cond_len, int icase)
219 {
220 struct strbuf text = STRBUF_INIT;
221 struct strbuf pattern = STRBUF_INIT;
222 int ret = 0, prefix;
223 const char *git_dir;
224 int already_tried_absolute = 0;
225
226 if (opts->git_dir)
227 git_dir = opts->git_dir;
228 else
229 goto done;
230
231 strbuf_realpath(&text, git_dir, 1);
232 strbuf_add(&pattern, cond, cond_len);
233 prefix = prepare_include_condition_pattern(&pattern);
234
235 again:
236 if (prefix < 0)
237 goto done;
238
239 if (prefix > 0) {
240 /*
241 * perform literal matching on the prefix part so that
242 * any wildcard character in it can't create side effects.
243 */
244 if (text.len < prefix)
245 goto done;
246 if (!icase && strncmp(pattern.buf, text.buf, prefix))
247 goto done;
248 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
249 goto done;
250 }
251
252 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
253 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
254
255 if (!ret && !already_tried_absolute) {
256 /*
257 * We've tried e.g. matching gitdir:~/work, but if
258 * ~/work is a symlink to /mnt/storage/work
259 * strbuf_realpath() will expand it, so the rule won't
260 * match. Let's match against a
261 * strbuf_add_absolute_path() version of the path,
262 * which'll do the right thing
263 */
264 strbuf_reset(&text);
265 strbuf_add_absolute_path(&text, git_dir);
266 already_tried_absolute = 1;
267 goto again;
268 }
269 done:
270 strbuf_release(&pattern);
271 strbuf_release(&text);
272 return ret;
273 }
274
275 static int include_by_branch(const char *cond, size_t cond_len)
276 {
277 int flags;
278 int ret;
279 struct strbuf pattern = STRBUF_INIT;
280 const char *refname = !the_repository->gitdir ?
281 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
282 const char *shortname;
283
284 if (!refname || !(flags & REF_ISSYMREF) ||
285 !skip_prefix(refname, "refs/heads/", &shortname))
286 return 0;
287
288 strbuf_add(&pattern, cond, cond_len);
289 add_trailing_starstar_for_dir(&pattern);
290 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
291 strbuf_release(&pattern);
292 return ret;
293 }
294
295 static int include_condition_is_true(const struct config_options *opts,
296 const char *cond, size_t cond_len)
297 {
298
299 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
300 return include_by_gitdir(opts, cond, cond_len, 0);
301 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
302 return include_by_gitdir(opts, cond, cond_len, 1);
303 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
304 return include_by_branch(cond, cond_len);
305
306 /* unknown conditionals are always false */
307 return 0;
308 }
309
310 int git_config_include(const char *var, const char *value, void *data)
311 {
312 struct config_include_data *inc = data;
313 const char *cond, *key;
314 size_t cond_len;
315 int ret;
316
317 /*
318 * Pass along all values, including "include" directives; this makes it
319 * possible to query information on the includes themselves.
320 */
321 ret = inc->fn(var, value, inc->data);
322 if (ret < 0)
323 return ret;
324
325 if (!strcmp(var, "include.path"))
326 ret = handle_path_include(value, inc);
327
328 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
329 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
330 !strcmp(key, "path"))
331 ret = handle_path_include(value, inc);
332
333 return ret;
334 }
335
336 static void git_config_push_split_parameter(const char *key, const char *value)
337 {
338 struct strbuf env = STRBUF_INIT;
339 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
340 if (old && *old) {
341 strbuf_addstr(&env, old);
342 strbuf_addch(&env, ' ');
343 }
344 sq_quote_buf(&env, key);
345 strbuf_addch(&env, '=');
346 if (value)
347 sq_quote_buf(&env, value);
348 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
349 strbuf_release(&env);
350 }
351
352 void git_config_push_parameter(const char *text)
353 {
354 const char *value;
355
356 /*
357 * When we see:
358 *
359 * section.subsection=with=equals.key=value
360 *
361 * we cannot tell if it means:
362 *
363 * [section "subsection=with=equals"]
364 * key = value
365 *
366 * or:
367 *
368 * [section]
369 * subsection = with=equals.key=value
370 *
371 * We parse left-to-right for the first "=", meaning we'll prefer to
372 * keep the value intact over the subsection. This is historical, but
373 * also sensible since values are more likely to contain odd or
374 * untrusted input than a section name.
375 *
376 * A missing equals is explicitly allowed (as a bool-only entry).
377 */
378 value = strchr(text, '=');
379 if (value) {
380 char *key = xmemdupz(text, value - text);
381 git_config_push_split_parameter(key, value + 1);
382 free(key);
383 } else {
384 git_config_push_split_parameter(text, NULL);
385 }
386 }
387
388 void git_config_push_env(const char *spec)
389 {
390 char *key;
391 const char *env_name;
392 const char *env_value;
393
394 env_name = strrchr(spec, '=');
395 if (!env_name)
396 die(_("invalid config format: %s"), spec);
397 key = xmemdupz(spec, env_name - spec);
398 env_name++;
399 if (!*env_name)
400 die(_("missing environment variable name for configuration '%.*s'"),
401 (int)(env_name - spec - 1), spec);
402
403 env_value = getenv(env_name);
404 if (!env_value)
405 die(_("missing environment variable '%s' for configuration '%.*s'"),
406 env_name, (int)(env_name - spec - 1), spec);
407
408 git_config_push_split_parameter(key, env_value);
409 free(key);
410 }
411
412 static inline int iskeychar(int c)
413 {
414 return isalnum(c) || c == '-';
415 }
416
417 /*
418 * Auxiliary function to sanity-check and split the key into the section
419 * identifier and variable name.
420 *
421 * Returns 0 on success, -1 when there is an invalid character in the key and
422 * -2 if there is no section name in the key.
423 *
424 * store_key - pointer to char* which will hold a copy of the key with
425 * lowercase section and variable name
426 * baselen - pointer to size_t which will hold the length of the
427 * section + subsection part, can be NULL
428 */
429 static int git_config_parse_key_1(const char *key, char **store_key, size_t *baselen_, int quiet)
430 {
431 size_t i, baselen;
432 int dot;
433 const char *last_dot = strrchr(key, '.');
434
435 /*
436 * Since "key" actually contains the section name and the real
437 * key name separated by a dot, we have to know where the dot is.
438 */
439
440 if (last_dot == NULL || last_dot == key) {
441 if (!quiet)
442 error(_("key does not contain a section: %s"), key);
443 return -CONFIG_NO_SECTION_OR_NAME;
444 }
445
446 if (!last_dot[1]) {
447 if (!quiet)
448 error(_("key does not contain variable name: %s"), key);
449 return -CONFIG_NO_SECTION_OR_NAME;
450 }
451
452 baselen = last_dot - key;
453 if (baselen_)
454 *baselen_ = baselen;
455
456 /*
457 * Validate the key and while at it, lower case it for matching.
458 */
459 if (store_key)
460 *store_key = xmallocz(strlen(key));
461
462 dot = 0;
463 for (i = 0; key[i]; i++) {
464 unsigned char c = key[i];
465 if (c == '.')
466 dot = 1;
467 /* Leave the extended basename untouched.. */
468 if (!dot || i > baselen) {
469 if (!iskeychar(c) ||
470 (i == baselen + 1 && !isalpha(c))) {
471 if (!quiet)
472 error(_("invalid key: %s"), key);
473 goto out_free_ret_1;
474 }
475 c = tolower(c);
476 } else if (c == '\n') {
477 if (!quiet)
478 error(_("invalid key (newline): %s"), key);
479 goto out_free_ret_1;
480 }
481 if (store_key)
482 (*store_key)[i] = c;
483 }
484
485 return 0;
486
487 out_free_ret_1:
488 if (store_key) {
489 FREE_AND_NULL(*store_key);
490 }
491 return -CONFIG_INVALID_KEY;
492 }
493
494 int git_config_parse_key(const char *key, char **store_key, size_t *baselen)
495 {
496 return git_config_parse_key_1(key, store_key, baselen, 0);
497 }
498
499 int git_config_key_is_valid(const char *key)
500 {
501 return !git_config_parse_key_1(key, NULL, NULL, 1);
502 }
503
504 static int config_parse_pair(const char *key, const char *value,
505 config_fn_t fn, void *data)
506 {
507 char *canonical_name;
508 int ret;
509
510 if (!strlen(key))
511 return error(_("empty config key"));
512 if (git_config_parse_key(key, &canonical_name, NULL))
513 return -1;
514
515 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
516 free(canonical_name);
517 return ret;
518 }
519
520 int git_config_parse_parameter(const char *text,
521 config_fn_t fn, void *data)
522 {
523 const char *value;
524 struct strbuf **pair;
525 int ret;
526
527 pair = strbuf_split_str(text, '=', 2);
528 if (!pair[0])
529 return error(_("bogus config parameter: %s"), text);
530
531 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
532 strbuf_setlen(pair[0], pair[0]->len - 1);
533 value = pair[1] ? pair[1]->buf : "";
534 } else {
535 value = NULL;
536 }
537
538 strbuf_trim(pair[0]);
539 if (!pair[0]->len) {
540 strbuf_list_free(pair);
541 return error(_("bogus config parameter: %s"), text);
542 }
543
544 ret = config_parse_pair(pair[0]->buf, value, fn, data);
545 strbuf_list_free(pair);
546 return ret;
547 }
548
549 static int parse_config_env_list(char *env, config_fn_t fn, void *data)
550 {
551 char *cur = env;
552 while (cur && *cur) {
553 const char *key = sq_dequote_step(cur, &cur);
554 if (!key)
555 return error(_("bogus format in %s"),
556 CONFIG_DATA_ENVIRONMENT);
557
558 if (!cur || isspace(*cur)) {
559 /* old-style 'key=value' */
560 if (git_config_parse_parameter(key, fn, data) < 0)
561 return -1;
562 }
563 else if (*cur == '=') {
564 /* new-style 'key'='value' */
565 const char *value;
566
567 cur++;
568 if (*cur == '\'') {
569 /* quoted value */
570 value = sq_dequote_step(cur, &cur);
571 if (!value || (cur && !isspace(*cur))) {
572 return error(_("bogus format in %s"),
573 CONFIG_DATA_ENVIRONMENT);
574 }
575 } else if (!*cur || isspace(*cur)) {
576 /* implicit bool: 'key'= */
577 value = NULL;
578 } else {
579 return error(_("bogus format in %s"),
580 CONFIG_DATA_ENVIRONMENT);
581 }
582
583 if (config_parse_pair(key, value, fn, data) < 0)
584 return -1;
585 }
586 else {
587 /* unknown format */
588 return error(_("bogus format in %s"),
589 CONFIG_DATA_ENVIRONMENT);
590 }
591
592 if (cur) {
593 while (isspace(*cur))
594 cur++;
595 }
596 }
597 return 0;
598 }
599
600 int git_config_from_parameters(config_fn_t fn, void *data)
601 {
602 const char *env;
603 struct strbuf envvar = STRBUF_INIT;
604 struct strvec to_free = STRVEC_INIT;
605 int ret = 0;
606 char *envw = NULL;
607 struct config_source source;
608
609 memset(&source, 0, sizeof(source));
610 source.prev = cf;
611 source.origin_type = CONFIG_ORIGIN_CMDLINE;
612 cf = &source;
613
614 env = getenv(CONFIG_COUNT_ENVIRONMENT);
615 if (env) {
616 unsigned long count;
617 char *endp;
618 int i;
619
620 count = strtoul(env, &endp, 10);
621 if (*endp) {
622 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
623 goto out;
624 }
625 if (count > INT_MAX) {
626 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
627 goto out;
628 }
629
630 for (i = 0; i < count; i++) {
631 const char *key, *value;
632
633 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
634 key = getenv_safe(&to_free, envvar.buf);
635 if (!key) {
636 ret = error(_("missing config key %s"), envvar.buf);
637 goto out;
638 }
639 strbuf_reset(&envvar);
640
641 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
642 value = getenv_safe(&to_free, envvar.buf);
643 if (!value) {
644 ret = error(_("missing config value %s"), envvar.buf);
645 goto out;
646 }
647 strbuf_reset(&envvar);
648
649 if (config_parse_pair(key, value, fn, data) < 0) {
650 ret = -1;
651 goto out;
652 }
653 }
654 }
655
656 env = getenv(CONFIG_DATA_ENVIRONMENT);
657 if (env) {
658 /* sq_dequote will write over it */
659 envw = xstrdup(env);
660 if (parse_config_env_list(envw, fn, data) < 0) {
661 ret = -1;
662 goto out;
663 }
664 }
665
666 out:
667 strbuf_release(&envvar);
668 strvec_clear(&to_free);
669 free(envw);
670 cf = source.prev;
671 return ret;
672 }
673
674 static int get_next_char(void)
675 {
676 int c = cf->do_fgetc(cf);
677
678 if (c == '\r') {
679 /* DOS like systems */
680 c = cf->do_fgetc(cf);
681 if (c != '\n') {
682 if (c != EOF)
683 cf->do_ungetc(c, cf);
684 c = '\r';
685 }
686 }
687
688 if (c != EOF && ++cf->total_len > INT_MAX) {
689 /*
690 * This is an absurdly long config file; refuse to parse
691 * further in order to protect downstream code from integer
692 * overflows. Note that we can't return an error specifically,
693 * but we can mark EOF and put trash in the return value,
694 * which will trigger a parse error.
695 */
696 cf->eof = 1;
697 return 0;
698 }
699
700 if (c == '\n')
701 cf->linenr++;
702 if (c == EOF) {
703 cf->eof = 1;
704 cf->linenr++;
705 c = '\n';
706 }
707 return c;
708 }
709
710 static char *parse_value(void)
711 {
712 int quote = 0, comment = 0, space = 0;
713
714 strbuf_reset(&cf->value);
715 for (;;) {
716 int c = get_next_char();
717 if (c == '\n') {
718 if (quote) {
719 cf->linenr--;
720 return NULL;
721 }
722 return cf->value.buf;
723 }
724 if (comment)
725 continue;
726 if (isspace(c) && !quote) {
727 if (cf->value.len)
728 space++;
729 continue;
730 }
731 if (!quote) {
732 if (c == ';' || c == '#') {
733 comment = 1;
734 continue;
735 }
736 }
737 for (; space; space--)
738 strbuf_addch(&cf->value, ' ');
739 if (c == '\\') {
740 c = get_next_char();
741 switch (c) {
742 case '\n':
743 continue;
744 case 't':
745 c = '\t';
746 break;
747 case 'b':
748 c = '\b';
749 break;
750 case 'n':
751 c = '\n';
752 break;
753 /* Some characters escape as themselves */
754 case '\\': case '"':
755 break;
756 /* Reject unknown escape sequences */
757 default:
758 return NULL;
759 }
760 strbuf_addch(&cf->value, c);
761 continue;
762 }
763 if (c == '"') {
764 quote = 1-quote;
765 continue;
766 }
767 strbuf_addch(&cf->value, c);
768 }
769 }
770
771 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
772 {
773 int c;
774 char *value;
775 int ret;
776
777 /* Get the full name */
778 for (;;) {
779 c = get_next_char();
780 if (cf->eof)
781 break;
782 if (!iskeychar(c))
783 break;
784 strbuf_addch(name, tolower(c));
785 }
786
787 while (c == ' ' || c == '\t')
788 c = get_next_char();
789
790 value = NULL;
791 if (c != '\n') {
792 if (c != '=')
793 return -1;
794 value = parse_value();
795 if (!value)
796 return -1;
797 }
798 /*
799 * We already consumed the \n, but we need linenr to point to
800 * the line we just parsed during the call to fn to get
801 * accurate line number in error messages.
802 */
803 cf->linenr--;
804 ret = fn(name->buf, value, data);
805 if (ret >= 0)
806 cf->linenr++;
807 return ret;
808 }
809
810 static int get_extended_base_var(struct strbuf *name, int c)
811 {
812 cf->subsection_case_sensitive = 0;
813 do {
814 if (c == '\n')
815 goto error_incomplete_line;
816 c = get_next_char();
817 } while (isspace(c));
818
819 /* We require the format to be '[base "extension"]' */
820 if (c != '"')
821 return -1;
822 strbuf_addch(name, '.');
823
824 for (;;) {
825 int c = get_next_char();
826 if (c == '\n')
827 goto error_incomplete_line;
828 if (c == '"')
829 break;
830 if (c == '\\') {
831 c = get_next_char();
832 if (c == '\n')
833 goto error_incomplete_line;
834 }
835 strbuf_addch(name, c);
836 }
837
838 /* Final ']' */
839 if (get_next_char() != ']')
840 return -1;
841 return 0;
842 error_incomplete_line:
843 cf->linenr--;
844 return -1;
845 }
846
847 static int get_base_var(struct strbuf *name)
848 {
849 cf->subsection_case_sensitive = 1;
850 for (;;) {
851 int c = get_next_char();
852 if (cf->eof)
853 return -1;
854 if (c == ']')
855 return 0;
856 if (isspace(c))
857 return get_extended_base_var(name, c);
858 if (!iskeychar(c) && c != '.')
859 return -1;
860 strbuf_addch(name, tolower(c));
861 }
862 }
863
864 struct parse_event_data {
865 enum config_event_t previous_type;
866 size_t previous_offset;
867 const struct config_options *opts;
868 };
869
870 static int do_event(enum config_event_t type, struct parse_event_data *data)
871 {
872 size_t offset;
873
874 if (!data->opts || !data->opts->event_fn)
875 return 0;
876
877 if (type == CONFIG_EVENT_WHITESPACE &&
878 data->previous_type == type)
879 return 0;
880
881 offset = cf->do_ftell(cf);
882 /*
883 * At EOF, the parser always "inserts" an extra '\n', therefore
884 * the end offset of the event is the current file position, otherwise
885 * we will already have advanced to the next event.
886 */
887 if (type != CONFIG_EVENT_EOF)
888 offset--;
889
890 if (data->previous_type != CONFIG_EVENT_EOF &&
891 data->opts->event_fn(data->previous_type, data->previous_offset,
892 offset, data->opts->event_fn_data) < 0)
893 return -1;
894
895 data->previous_type = type;
896 data->previous_offset = offset;
897
898 return 0;
899 }
900
901 static int git_parse_source(config_fn_t fn, void *data,
902 const struct config_options *opts)
903 {
904 int comment = 0;
905 size_t baselen = 0;
906 struct strbuf *var = &cf->var;
907 int error_return = 0;
908 char *error_msg = NULL;
909
910 /* U+FEFF Byte Order Mark in UTF8 */
911 const char *bomptr = utf8_bom;
912
913 /* For the parser event callback */
914 struct parse_event_data event_data = {
915 CONFIG_EVENT_EOF, 0, opts
916 };
917
918 for (;;) {
919 int c;
920
921 c = get_next_char();
922 if (bomptr && *bomptr) {
923 /* We are at the file beginning; skip UTF8-encoded BOM
924 * if present. Sane editors won't put this in on their
925 * own, but e.g. Windows Notepad will do it happily. */
926 if (c == (*bomptr & 0377)) {
927 bomptr++;
928 continue;
929 } else {
930 /* Do not tolerate partial BOM. */
931 if (bomptr != utf8_bom)
932 break;
933 /* No BOM at file beginning. Cool. */
934 bomptr = NULL;
935 }
936 }
937 if (c == '\n') {
938 if (cf->eof) {
939 if (do_event(CONFIG_EVENT_EOF, &event_data) < 0)
940 return -1;
941 return 0;
942 }
943 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
944 return -1;
945 comment = 0;
946 continue;
947 }
948 if (comment)
949 continue;
950 if (isspace(c)) {
951 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
952 return -1;
953 continue;
954 }
955 if (c == '#' || c == ';') {
956 if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0)
957 return -1;
958 comment = 1;
959 continue;
960 }
961 if (c == '[') {
962 if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0)
963 return -1;
964
965 /* Reset prior to determining a new stem */
966 strbuf_reset(var);
967 if (get_base_var(var) < 0 || var->len < 1)
968 break;
969 strbuf_addch(var, '.');
970 baselen = var->len;
971 continue;
972 }
973 if (!isalpha(c))
974 break;
975
976 if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0)
977 return -1;
978
979 /*
980 * Truncate the var name back to the section header
981 * stem prior to grabbing the suffix part of the name
982 * and the value.
983 */
984 strbuf_setlen(var, baselen);
985 strbuf_addch(var, tolower(c));
986 if (get_value(fn, data, var) < 0)
987 break;
988 }
989
990 if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0)
991 return -1;
992
993 switch (cf->origin_type) {
994 case CONFIG_ORIGIN_BLOB:
995 error_msg = xstrfmt(_("bad config line %d in blob %s"),
996 cf->linenr, cf->name);
997 break;
998 case CONFIG_ORIGIN_FILE:
999 error_msg = xstrfmt(_("bad config line %d in file %s"),
1000 cf->linenr, cf->name);
1001 break;
1002 case CONFIG_ORIGIN_STDIN:
1003 error_msg = xstrfmt(_("bad config line %d in standard input"),
1004 cf->linenr);
1005 break;
1006 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1007 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1008 cf->linenr, cf->name);
1009 break;
1010 case CONFIG_ORIGIN_CMDLINE:
1011 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1012 cf->linenr, cf->name);
1013 break;
1014 default:
1015 error_msg = xstrfmt(_("bad config line %d in %s"),
1016 cf->linenr, cf->name);
1017 }
1018
1019 switch (opts && opts->error_action ?
1020 opts->error_action :
1021 cf->default_error_action) {
1022 case CONFIG_ERROR_DIE:
1023 die("%s", error_msg);
1024 break;
1025 case CONFIG_ERROR_ERROR:
1026 error_return = error("%s", error_msg);
1027 break;
1028 case CONFIG_ERROR_SILENT:
1029 error_return = -1;
1030 break;
1031 case CONFIG_ERROR_UNSET:
1032 BUG("config error action unset");
1033 }
1034
1035 free(error_msg);
1036 return error_return;
1037 }
1038
1039 static uintmax_t get_unit_factor(const char *end)
1040 {
1041 if (!*end)
1042 return 1;
1043 else if (!strcasecmp(end, "k"))
1044 return 1024;
1045 else if (!strcasecmp(end, "m"))
1046 return 1024 * 1024;
1047 else if (!strcasecmp(end, "g"))
1048 return 1024 * 1024 * 1024;
1049 return 0;
1050 }
1051
1052 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
1053 {
1054 if (value && *value) {
1055 char *end;
1056 intmax_t val;
1057 uintmax_t uval;
1058 uintmax_t factor;
1059
1060 errno = 0;
1061 val = strtoimax(value, &end, 0);
1062 if (errno == ERANGE)
1063 return 0;
1064 factor = get_unit_factor(end);
1065 if (!factor) {
1066 errno = EINVAL;
1067 return 0;
1068 }
1069 uval = val < 0 ? -val : val;
1070 if (unsigned_mult_overflows(factor, uval) ||
1071 factor * uval > max) {
1072 errno = ERANGE;
1073 return 0;
1074 }
1075 val *= factor;
1076 *ret = val;
1077 return 1;
1078 }
1079 errno = EINVAL;
1080 return 0;
1081 }
1082
1083 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
1084 {
1085 if (value && *value) {
1086 char *end;
1087 uintmax_t val;
1088 uintmax_t factor;
1089
1090 errno = 0;
1091 val = strtoumax(value, &end, 0);
1092 if (errno == ERANGE)
1093 return 0;
1094 factor = get_unit_factor(end);
1095 if (!factor) {
1096 errno = EINVAL;
1097 return 0;
1098 }
1099 if (unsigned_mult_overflows(factor, val) ||
1100 factor * val > max) {
1101 errno = ERANGE;
1102 return 0;
1103 }
1104 val *= factor;
1105 *ret = val;
1106 return 1;
1107 }
1108 errno = EINVAL;
1109 return 0;
1110 }
1111
1112 static int git_parse_int(const char *value, int *ret)
1113 {
1114 intmax_t tmp;
1115 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
1116 return 0;
1117 *ret = tmp;
1118 return 1;
1119 }
1120
1121 static int git_parse_int64(const char *value, int64_t *ret)
1122 {
1123 intmax_t tmp;
1124 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
1125 return 0;
1126 *ret = tmp;
1127 return 1;
1128 }
1129
1130 int git_parse_ulong(const char *value, unsigned long *ret)
1131 {
1132 uintmax_t tmp;
1133 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
1134 return 0;
1135 *ret = tmp;
1136 return 1;
1137 }
1138
1139 int git_parse_ssize_t(const char *value, ssize_t *ret)
1140 {
1141 intmax_t tmp;
1142 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
1143 return 0;
1144 *ret = tmp;
1145 return 1;
1146 }
1147
1148 NORETURN
1149 static void die_bad_number(const char *name, const char *value)
1150 {
1151 const char *error_type = (errno == ERANGE) ?
1152 N_("out of range") : N_("invalid unit");
1153 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1154
1155 if (!value)
1156 value = "";
1157
1158 if (!(cf && cf->name))
1159 die(_(bad_numeric), value, name, _(error_type));
1160
1161 switch (cf->origin_type) {
1162 case CONFIG_ORIGIN_BLOB:
1163 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1164 value, name, cf->name, _(error_type));
1165 case CONFIG_ORIGIN_FILE:
1166 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1167 value, name, cf->name, _(error_type));
1168 case CONFIG_ORIGIN_STDIN:
1169 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1170 value, name, _(error_type));
1171 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1172 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1173 value, name, cf->name, _(error_type));
1174 case CONFIG_ORIGIN_CMDLINE:
1175 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1176 value, name, cf->name, _(error_type));
1177 default:
1178 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1179 value, name, cf->name, _(error_type));
1180 }
1181 }
1182
1183 int git_config_int(const char *name, const char *value)
1184 {
1185 int ret;
1186 if (!git_parse_int(value, &ret))
1187 die_bad_number(name, value);
1188 return ret;
1189 }
1190
1191 int64_t git_config_int64(const char *name, const char *value)
1192 {
1193 int64_t ret;
1194 if (!git_parse_int64(value, &ret))
1195 die_bad_number(name, value);
1196 return ret;
1197 }
1198
1199 unsigned long git_config_ulong(const char *name, const char *value)
1200 {
1201 unsigned long ret;
1202 if (!git_parse_ulong(value, &ret))
1203 die_bad_number(name, value);
1204 return ret;
1205 }
1206
1207 ssize_t git_config_ssize_t(const char *name, const char *value)
1208 {
1209 ssize_t ret;
1210 if (!git_parse_ssize_t(value, &ret))
1211 die_bad_number(name, value);
1212 return ret;
1213 }
1214
1215 static int git_parse_maybe_bool_text(const char *value)
1216 {
1217 if (!value)
1218 return 1;
1219 if (!*value)
1220 return 0;
1221 if (!strcasecmp(value, "true")
1222 || !strcasecmp(value, "yes")
1223 || !strcasecmp(value, "on"))
1224 return 1;
1225 if (!strcasecmp(value, "false")
1226 || !strcasecmp(value, "no")
1227 || !strcasecmp(value, "off"))
1228 return 0;
1229 return -1;
1230 }
1231
1232 int git_parse_maybe_bool(const char *value)
1233 {
1234 int v = git_parse_maybe_bool_text(value);
1235 if (0 <= v)
1236 return v;
1237 if (git_parse_int(value, &v))
1238 return !!v;
1239 return -1;
1240 }
1241
1242 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1243 {
1244 int v = git_parse_maybe_bool_text(value);
1245 if (0 <= v) {
1246 *is_bool = 1;
1247 return v;
1248 }
1249 *is_bool = 0;
1250 return git_config_int(name, value);
1251 }
1252
1253 int git_config_bool(const char *name, const char *value)
1254 {
1255 int v = git_parse_maybe_bool(value);
1256 if (v < 0)
1257 die(_("bad boolean config value '%s' for '%s'"), value, name);
1258 return v;
1259 }
1260
1261 int git_config_string(const char **dest, const char *var, const char *value)
1262 {
1263 if (!value)
1264 return config_error_nonbool(var);
1265 *dest = xstrdup(value);
1266 return 0;
1267 }
1268
1269 int git_config_pathname(const char **dest, const char *var, const char *value)
1270 {
1271 if (!value)
1272 return config_error_nonbool(var);
1273 *dest = interpolate_path(value, 0);
1274 if (!*dest)
1275 die(_("failed to expand user dir in: '%s'"), value);
1276 return 0;
1277 }
1278
1279 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1280 {
1281 if (!value)
1282 return config_error_nonbool(var);
1283 if (parse_expiry_date(value, timestamp))
1284 return error(_("'%s' for '%s' is not a valid timestamp"),
1285 value, var);
1286 return 0;
1287 }
1288
1289 int git_config_color(char *dest, const char *var, const char *value)
1290 {
1291 if (!value)
1292 return config_error_nonbool(var);
1293 if (color_parse(value, dest) < 0)
1294 return -1;
1295 return 0;
1296 }
1297
1298 static int git_default_core_config(const char *var, const char *value, void *cb)
1299 {
1300 /* This needs a better name */
1301 if (!strcmp(var, "core.filemode")) {
1302 trust_executable_bit = git_config_bool(var, value);
1303 return 0;
1304 }
1305 if (!strcmp(var, "core.trustctime")) {
1306 trust_ctime = git_config_bool(var, value);
1307 return 0;
1308 }
1309 if (!strcmp(var, "core.checkstat")) {
1310 if (!strcasecmp(value, "default"))
1311 check_stat = 1;
1312 else if (!strcasecmp(value, "minimal"))
1313 check_stat = 0;
1314 }
1315
1316 if (!strcmp(var, "core.quotepath")) {
1317 quote_path_fully = git_config_bool(var, value);
1318 return 0;
1319 }
1320
1321 if (!strcmp(var, "core.symlinks")) {
1322 has_symlinks = git_config_bool(var, value);
1323 return 0;
1324 }
1325
1326 if (!strcmp(var, "core.ignorecase")) {
1327 ignore_case = git_config_bool(var, value);
1328 return 0;
1329 }
1330
1331 if (!strcmp(var, "core.attributesfile"))
1332 return git_config_pathname(&git_attributes_file, var, value);
1333
1334 if (!strcmp(var, "core.hookspath"))
1335 return git_config_pathname(&git_hooks_path, var, value);
1336
1337 if (!strcmp(var, "core.bare")) {
1338 is_bare_repository_cfg = git_config_bool(var, value);
1339 return 0;
1340 }
1341
1342 if (!strcmp(var, "core.ignorestat")) {
1343 assume_unchanged = git_config_bool(var, value);
1344 return 0;
1345 }
1346
1347 if (!strcmp(var, "core.prefersymlinkrefs")) {
1348 prefer_symlink_refs = git_config_bool(var, value);
1349 return 0;
1350 }
1351
1352 if (!strcmp(var, "core.logallrefupdates")) {
1353 if (value && !strcasecmp(value, "always"))
1354 log_all_ref_updates = LOG_REFS_ALWAYS;
1355 else if (git_config_bool(var, value))
1356 log_all_ref_updates = LOG_REFS_NORMAL;
1357 else
1358 log_all_ref_updates = LOG_REFS_NONE;
1359 return 0;
1360 }
1361
1362 if (!strcmp(var, "core.warnambiguousrefs")) {
1363 warn_ambiguous_refs = git_config_bool(var, value);
1364 return 0;
1365 }
1366
1367 if (!strcmp(var, "core.abbrev")) {
1368 if (!value)
1369 return config_error_nonbool(var);
1370 if (!strcasecmp(value, "auto"))
1371 default_abbrev = -1;
1372 else if (!git_parse_maybe_bool_text(value))
1373 default_abbrev = the_hash_algo->hexsz;
1374 else {
1375 int abbrev = git_config_int(var, value);
1376 if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
1377 return error(_("abbrev length out of range: %d"), abbrev);
1378 default_abbrev = abbrev;
1379 }
1380 return 0;
1381 }
1382
1383 if (!strcmp(var, "core.disambiguate"))
1384 return set_disambiguate_hint_config(var, value);
1385
1386 if (!strcmp(var, "core.loosecompression")) {
1387 int level = git_config_int(var, value);
1388 if (level == -1)
1389 level = Z_DEFAULT_COMPRESSION;
1390 else if (level < 0 || level > Z_BEST_COMPRESSION)
1391 die(_("bad zlib compression level %d"), level);
1392 zlib_compression_level = level;
1393 zlib_compression_seen = 1;
1394 return 0;
1395 }
1396
1397 if (!strcmp(var, "core.compression")) {
1398 int level = git_config_int(var, value);
1399 if (level == -1)
1400 level = Z_DEFAULT_COMPRESSION;
1401 else if (level < 0 || level > Z_BEST_COMPRESSION)
1402 die(_("bad zlib compression level %d"), level);
1403 core_compression_level = level;
1404 core_compression_seen = 1;
1405 if (!zlib_compression_seen)
1406 zlib_compression_level = level;
1407 if (!pack_compression_seen)
1408 pack_compression_level = level;
1409 return 0;
1410 }
1411
1412 if (!strcmp(var, "core.packedgitwindowsize")) {
1413 int pgsz_x2 = getpagesize() * 2;
1414 packed_git_window_size = git_config_ulong(var, value);
1415
1416 /* This value must be multiple of (pagesize * 2) */
1417 packed_git_window_size /= pgsz_x2;
1418 if (packed_git_window_size < 1)
1419 packed_git_window_size = 1;
1420 packed_git_window_size *= pgsz_x2;
1421 return 0;
1422 }
1423
1424 if (!strcmp(var, "core.bigfilethreshold")) {
1425 big_file_threshold = git_config_ulong(var, value);
1426 return 0;
1427 }
1428
1429 if (!strcmp(var, "core.packedgitlimit")) {
1430 packed_git_limit = git_config_ulong(var, value);
1431 return 0;
1432 }
1433
1434 if (!strcmp(var, "core.deltabasecachelimit")) {
1435 delta_base_cache_limit = git_config_ulong(var, value);
1436 return 0;
1437 }
1438
1439 if (!strcmp(var, "core.autocrlf")) {
1440 if (value && !strcasecmp(value, "input")) {
1441 auto_crlf = AUTO_CRLF_INPUT;
1442 return 0;
1443 }
1444 auto_crlf = git_config_bool(var, value);
1445 return 0;
1446 }
1447
1448 if (!strcmp(var, "core.safecrlf")) {
1449 int eol_rndtrp_die;
1450 if (value && !strcasecmp(value, "warn")) {
1451 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1452 return 0;
1453 }
1454 eol_rndtrp_die = git_config_bool(var, value);
1455 global_conv_flags_eol = eol_rndtrp_die ?
1456 CONV_EOL_RNDTRP_DIE : 0;
1457 return 0;
1458 }
1459
1460 if (!strcmp(var, "core.eol")) {
1461 if (value && !strcasecmp(value, "lf"))
1462 core_eol = EOL_LF;
1463 else if (value && !strcasecmp(value, "crlf"))
1464 core_eol = EOL_CRLF;
1465 else if (value && !strcasecmp(value, "native"))
1466 core_eol = EOL_NATIVE;
1467 else
1468 core_eol = EOL_UNSET;
1469 return 0;
1470 }
1471
1472 if (!strcmp(var, "core.checkroundtripencoding")) {
1473 check_roundtrip_encoding = xstrdup(value);
1474 return 0;
1475 }
1476
1477 if (!strcmp(var, "core.notesref")) {
1478 notes_ref_name = xstrdup(value);
1479 return 0;
1480 }
1481
1482 if (!strcmp(var, "core.editor"))
1483 return git_config_string(&editor_program, var, value);
1484
1485 if (!strcmp(var, "core.commentchar")) {
1486 if (!value)
1487 return config_error_nonbool(var);
1488 else if (!strcasecmp(value, "auto"))
1489 auto_comment_line_char = 1;
1490 else if (value[0] && !value[1]) {
1491 comment_line_char = value[0];
1492 auto_comment_line_char = 0;
1493 } else
1494 return error(_("core.commentChar should only be one character"));
1495 return 0;
1496 }
1497
1498 if (!strcmp(var, "core.askpass"))
1499 return git_config_string(&askpass_program, var, value);
1500
1501 if (!strcmp(var, "core.excludesfile"))
1502 return git_config_pathname(&excludes_file, var, value);
1503
1504 if (!strcmp(var, "core.whitespace")) {
1505 if (!value)
1506 return config_error_nonbool(var);
1507 whitespace_rule_cfg = parse_whitespace_rule(value);
1508 return 0;
1509 }
1510
1511 if (!strcmp(var, "core.fsyncobjectfiles")) {
1512 fsync_object_files = git_config_bool(var, value);
1513 return 0;
1514 }
1515
1516 if (!strcmp(var, "core.preloadindex")) {
1517 core_preload_index = git_config_bool(var, value);
1518 return 0;
1519 }
1520
1521 if (!strcmp(var, "core.createobject")) {
1522 if (!strcmp(value, "rename"))
1523 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1524 else if (!strcmp(value, "link"))
1525 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1526 else
1527 die(_("invalid mode for object creation: %s"), value);
1528 return 0;
1529 }
1530
1531 if (!strcmp(var, "core.sparsecheckout")) {
1532 core_apply_sparse_checkout = git_config_bool(var, value);
1533 return 0;
1534 }
1535
1536 if (!strcmp(var, "core.sparsecheckoutcone")) {
1537 core_sparse_checkout_cone = git_config_bool(var, value);
1538 return 0;
1539 }
1540
1541 if (!strcmp(var, "core.precomposeunicode")) {
1542 precomposed_unicode = git_config_bool(var, value);
1543 return 0;
1544 }
1545
1546 if (!strcmp(var, "core.protecthfs")) {
1547 protect_hfs = git_config_bool(var, value);
1548 return 0;
1549 }
1550
1551 if (!strcmp(var, "core.protectntfs")) {
1552 protect_ntfs = git_config_bool(var, value);
1553 return 0;
1554 }
1555
1556 if (!strcmp(var, "core.usereplacerefs")) {
1557 read_replace_refs = git_config_bool(var, value);
1558 return 0;
1559 }
1560
1561 /* Add other config variables here and to Documentation/config.txt. */
1562 return platform_core_config(var, value, cb);
1563 }
1564
1565 static int git_default_i18n_config(const char *var, const char *value)
1566 {
1567 if (!strcmp(var, "i18n.commitencoding"))
1568 return git_config_string(&git_commit_encoding, var, value);
1569
1570 if (!strcmp(var, "i18n.logoutputencoding"))
1571 return git_config_string(&git_log_output_encoding, var, value);
1572
1573 /* Add other config variables here and to Documentation/config.txt. */
1574 return 0;
1575 }
1576
1577 static int git_default_branch_config(const char *var, const char *value)
1578 {
1579 if (!strcmp(var, "branch.autosetupmerge")) {
1580 if (value && !strcasecmp(value, "always")) {
1581 git_branch_track = BRANCH_TRACK_ALWAYS;
1582 return 0;
1583 }
1584 git_branch_track = git_config_bool(var, value);
1585 return 0;
1586 }
1587 if (!strcmp(var, "branch.autosetuprebase")) {
1588 if (!value)
1589 return config_error_nonbool(var);
1590 else if (!strcmp(value, "never"))
1591 autorebase = AUTOREBASE_NEVER;
1592 else if (!strcmp(value, "local"))
1593 autorebase = AUTOREBASE_LOCAL;
1594 else if (!strcmp(value, "remote"))
1595 autorebase = AUTOREBASE_REMOTE;
1596 else if (!strcmp(value, "always"))
1597 autorebase = AUTOREBASE_ALWAYS;
1598 else
1599 return error(_("malformed value for %s"), var);
1600 return 0;
1601 }
1602
1603 /* Add other config variables here and to Documentation/config.txt. */
1604 return 0;
1605 }
1606
1607 static int git_default_push_config(const char *var, const char *value)
1608 {
1609 if (!strcmp(var, "push.default")) {
1610 if (!value)
1611 return config_error_nonbool(var);
1612 else if (!strcmp(value, "nothing"))
1613 push_default = PUSH_DEFAULT_NOTHING;
1614 else if (!strcmp(value, "matching"))
1615 push_default = PUSH_DEFAULT_MATCHING;
1616 else if (!strcmp(value, "simple"))
1617 push_default = PUSH_DEFAULT_SIMPLE;
1618 else if (!strcmp(value, "upstream"))
1619 push_default = PUSH_DEFAULT_UPSTREAM;
1620 else if (!strcmp(value, "tracking")) /* deprecated */
1621 push_default = PUSH_DEFAULT_UPSTREAM;
1622 else if (!strcmp(value, "current"))
1623 push_default = PUSH_DEFAULT_CURRENT;
1624 else {
1625 error(_("malformed value for %s: %s"), var, value);
1626 return error(_("must be one of nothing, matching, simple, "
1627 "upstream or current"));
1628 }
1629 return 0;
1630 }
1631
1632 /* Add other config variables here and to Documentation/config.txt. */
1633 return 0;
1634 }
1635
1636 static int git_default_mailmap_config(const char *var, const char *value)
1637 {
1638 if (!strcmp(var, "mailmap.file"))
1639 return git_config_pathname(&git_mailmap_file, var, value);
1640 if (!strcmp(var, "mailmap.blob"))
1641 return git_config_string(&git_mailmap_blob, var, value);
1642
1643 /* Add other config variables here and to Documentation/config.txt. */
1644 return 0;
1645 }
1646
1647 int git_default_config(const char *var, const char *value, void *cb)
1648 {
1649 if (starts_with(var, "core."))
1650 return git_default_core_config(var, value, cb);
1651
1652 if (starts_with(var, "user.") ||
1653 starts_with(var, "author.") ||
1654 starts_with(var, "committer."))
1655 return git_ident_config(var, value, cb);
1656
1657 if (starts_with(var, "i18n."))
1658 return git_default_i18n_config(var, value);
1659
1660 if (starts_with(var, "branch."))
1661 return git_default_branch_config(var, value);
1662
1663 if (starts_with(var, "push."))
1664 return git_default_push_config(var, value);
1665
1666 if (starts_with(var, "mailmap."))
1667 return git_default_mailmap_config(var, value);
1668
1669 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1670 return git_default_advice_config(var, value);
1671
1672 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1673 pager_use_color = git_config_bool(var,value);
1674 return 0;
1675 }
1676
1677 if (!strcmp(var, "pack.packsizelimit")) {
1678 pack_size_limit_cfg = git_config_ulong(var, value);
1679 return 0;
1680 }
1681
1682 if (!strcmp(var, "pack.compression")) {
1683 int level = git_config_int(var, value);
1684 if (level == -1)
1685 level = Z_DEFAULT_COMPRESSION;
1686 else if (level < 0 || level > Z_BEST_COMPRESSION)
1687 die(_("bad pack compression level %d"), level);
1688 pack_compression_level = level;
1689 pack_compression_seen = 1;
1690 return 0;
1691 }
1692
1693 /* Add other config variables here and to Documentation/config.txt. */
1694 return 0;
1695 }
1696
1697 /*
1698 * All source specific fields in the union, die_on_error, name and the callbacks
1699 * fgetc, ungetc, ftell of top need to be initialized before calling
1700 * this function.
1701 */
1702 static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
1703 const struct config_options *opts)
1704 {
1705 int ret;
1706
1707 /* push config-file parsing state stack */
1708 top->prev = cf;
1709 top->linenr = 1;
1710 top->eof = 0;
1711 top->total_len = 0;
1712 strbuf_init(&top->value, 1024);
1713 strbuf_init(&top->var, 1024);
1714 cf = top;
1715
1716 ret = git_parse_source(fn, data, opts);
1717
1718 /* pop config-file parsing state stack */
1719 strbuf_release(&top->value);
1720 strbuf_release(&top->var);
1721 cf = top->prev;
1722
1723 return ret;
1724 }
1725
1726 static int do_config_from_file(config_fn_t fn,
1727 const enum config_origin_type origin_type,
1728 const char *name, const char *path, FILE *f,
1729 void *data, const struct config_options *opts)
1730 {
1731 struct config_source top;
1732 int ret;
1733
1734 top.u.file = f;
1735 top.origin_type = origin_type;
1736 top.name = name;
1737 top.path = path;
1738 top.default_error_action = CONFIG_ERROR_DIE;
1739 top.do_fgetc = config_file_fgetc;
1740 top.do_ungetc = config_file_ungetc;
1741 top.do_ftell = config_file_ftell;
1742
1743 flockfile(f);
1744 ret = do_config_from(&top, fn, data, opts);
1745 funlockfile(f);
1746 return ret;
1747 }
1748
1749 static int git_config_from_stdin(config_fn_t fn, void *data)
1750 {
1751 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1752 data, NULL);
1753 }
1754
1755 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1756 void *data,
1757 const struct config_options *opts)
1758 {
1759 int ret = -1;
1760 FILE *f;
1761
1762 f = fopen_or_warn(filename, "r");
1763 if (f) {
1764 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1765 filename, f, data, opts);
1766 fclose(f);
1767 }
1768 return ret;
1769 }
1770
1771 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1772 {
1773 return git_config_from_file_with_options(fn, filename, data, NULL);
1774 }
1775
1776 int git_config_from_mem(config_fn_t fn,
1777 const enum config_origin_type origin_type,
1778 const char *name, const char *buf, size_t len,
1779 void *data, const struct config_options *opts)
1780 {
1781 struct config_source top;
1782
1783 top.u.buf.buf = buf;
1784 top.u.buf.len = len;
1785 top.u.buf.pos = 0;
1786 top.origin_type = origin_type;
1787 top.name = name;
1788 top.path = NULL;
1789 top.default_error_action = CONFIG_ERROR_ERROR;
1790 top.do_fgetc = config_buf_fgetc;
1791 top.do_ungetc = config_buf_ungetc;
1792 top.do_ftell = config_buf_ftell;
1793
1794 return do_config_from(&top, fn, data, opts);
1795 }
1796
1797 int git_config_from_blob_oid(config_fn_t fn,
1798 const char *name,
1799 const struct object_id *oid,
1800 void *data)
1801 {
1802 enum object_type type;
1803 char *buf;
1804 unsigned long size;
1805 int ret;
1806
1807 buf = read_object_file(oid, &type, &size);
1808 if (!buf)
1809 return error(_("unable to load config blob object '%s'"), name);
1810 if (type != OBJ_BLOB) {
1811 free(buf);
1812 return error(_("reference '%s' does not point to a blob"), name);
1813 }
1814
1815 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1816 data, NULL);
1817 free(buf);
1818
1819 return ret;
1820 }
1821
1822 static int git_config_from_blob_ref(config_fn_t fn,
1823 const char *name,
1824 void *data)
1825 {
1826 struct object_id oid;
1827
1828 if (get_oid(name, &oid) < 0)
1829 return error(_("unable to resolve config blob '%s'"), name);
1830 return git_config_from_blob_oid(fn, name, &oid, data);
1831 }
1832
1833 char *git_system_config(void)
1834 {
1835 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
1836 if (!system_config)
1837 system_config = system_path(ETC_GITCONFIG);
1838 normalize_path_copy(system_config, system_config);
1839 return system_config;
1840 }
1841
1842 void git_global_config(char **user_out, char **xdg_out)
1843 {
1844 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
1845 char *xdg_config = NULL;
1846
1847 if (!user_config) {
1848 user_config = interpolate_path("~/.gitconfig", 0);
1849 xdg_config = xdg_config_home("config");
1850 }
1851
1852 *user_out = user_config;
1853 *xdg_out = xdg_config;
1854 }
1855
1856 /*
1857 * Parse environment variable 'k' as a boolean (in various
1858 * possible spellings); if missing, use the default value 'def'.
1859 */
1860 int git_env_bool(const char *k, int def)
1861 {
1862 const char *v = getenv(k);
1863 return v ? git_config_bool(k, v) : def;
1864 }
1865
1866 /*
1867 * Parse environment variable 'k' as ulong with possibly a unit
1868 * suffix; if missing, use the default value 'val'.
1869 */
1870 unsigned long git_env_ulong(const char *k, unsigned long val)
1871 {
1872 const char *v = getenv(k);
1873 if (v && !git_parse_ulong(v, &val))
1874 die(_("failed to parse %s"), k);
1875 return val;
1876 }
1877
1878 int git_config_system(void)
1879 {
1880 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1881 }
1882
1883 static int do_git_config_sequence(const struct config_options *opts,
1884 config_fn_t fn, void *data)
1885 {
1886 int ret = 0;
1887 char *system_config = git_system_config();
1888 char *xdg_config = NULL;
1889 char *user_config = NULL;
1890 char *repo_config;
1891 enum config_scope prev_parsing_scope = current_parsing_scope;
1892
1893 if (opts->commondir)
1894 repo_config = mkpathdup("%s/config", opts->commondir);
1895 else if (opts->git_dir)
1896 BUG("git_dir without commondir");
1897 else
1898 repo_config = NULL;
1899
1900 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1901 if (git_config_system() && system_config &&
1902 !access_or_die(system_config, R_OK,
1903 opts->system_gently ? ACCESS_EACCES_OK : 0))
1904 ret += git_config_from_file(fn, system_config, data);
1905
1906 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1907 git_global_config(&user_config, &xdg_config);
1908
1909 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1910 ret += git_config_from_file(fn, xdg_config, data);
1911
1912 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1913 ret += git_config_from_file(fn, user_config, data);
1914
1915 current_parsing_scope = CONFIG_SCOPE_LOCAL;
1916 if (!opts->ignore_repo && repo_config &&
1917 !access_or_die(repo_config, R_OK, 0))
1918 ret += git_config_from_file(fn, repo_config, data);
1919
1920 current_parsing_scope = CONFIG_SCOPE_WORKTREE;
1921 if (!opts->ignore_worktree && repository_format_worktree_config) {
1922 char *path = git_pathdup("config.worktree");
1923 if (!access_or_die(path, R_OK, 0))
1924 ret += git_config_from_file(fn, path, data);
1925 free(path);
1926 }
1927
1928 current_parsing_scope = CONFIG_SCOPE_COMMAND;
1929 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
1930 die(_("unable to parse command-line config"));
1931
1932 current_parsing_scope = prev_parsing_scope;
1933 free(system_config);
1934 free(xdg_config);
1935 free(user_config);
1936 free(repo_config);
1937 return ret;
1938 }
1939
1940 int config_with_options(config_fn_t fn, void *data,
1941 struct git_config_source *config_source,
1942 const struct config_options *opts)
1943 {
1944 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1945
1946 if (opts->respect_includes) {
1947 inc.fn = fn;
1948 inc.data = data;
1949 inc.opts = opts;
1950 fn = git_config_include;
1951 data = &inc;
1952 }
1953
1954 if (config_source)
1955 current_parsing_scope = config_source->scope;
1956
1957 /*
1958 * If we have a specific filename, use it. Otherwise, follow the
1959 * regular lookup sequence.
1960 */
1961 if (config_source && config_source->use_stdin)
1962 return git_config_from_stdin(fn, data);
1963 else if (config_source && config_source->file)
1964 return git_config_from_file(fn, config_source->file, data);
1965 else if (config_source && config_source->blob)
1966 return git_config_from_blob_ref(fn, config_source->blob, data);
1967
1968 return do_git_config_sequence(opts, fn, data);
1969 }
1970
1971 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1972 {
1973 int i, value_index;
1974 struct string_list *values;
1975 struct config_set_element *entry;
1976 struct configset_list *list = &cs->list;
1977
1978 for (i = 0; i < list->nr; i++) {
1979 entry = list->items[i].e;
1980 value_index = list->items[i].value_index;
1981 values = &entry->value_list;
1982
1983 current_config_kvi = values->items[value_index].util;
1984
1985 if (fn(entry->key, values->items[value_index].string, data) < 0)
1986 git_die_config_linenr(entry->key,
1987 current_config_kvi->filename,
1988 current_config_kvi->linenr);
1989
1990 current_config_kvi = NULL;
1991 }
1992 }
1993
1994 void read_early_config(config_fn_t cb, void *data)
1995 {
1996 struct config_options opts = {0};
1997 struct strbuf commondir = STRBUF_INIT;
1998 struct strbuf gitdir = STRBUF_INIT;
1999
2000 opts.respect_includes = 1;
2001
2002 if (have_git_dir()) {
2003 opts.commondir = get_git_common_dir();
2004 opts.git_dir = get_git_dir();
2005 /*
2006 * When setup_git_directory() was not yet asked to discover the
2007 * GIT_DIR, we ask discover_git_directory() to figure out whether there
2008 * is any repository config we should use (but unlike
2009 * setup_git_directory_gently(), no global state is changed, most
2010 * notably, the current working directory is still the same after the
2011 * call).
2012 */
2013 } else if (!discover_git_directory(&commondir, &gitdir)) {
2014 opts.commondir = commondir.buf;
2015 opts.git_dir = gitdir.buf;
2016 }
2017
2018 config_with_options(cb, data, NULL, &opts);
2019
2020 strbuf_release(&commondir);
2021 strbuf_release(&gitdir);
2022 }
2023
2024 /*
2025 * Read config but only enumerate system and global settings.
2026 * Omit any repo-local, worktree-local, or command-line settings.
2027 */
2028 void read_very_early_config(config_fn_t cb, void *data)
2029 {
2030 struct config_options opts = { 0 };
2031
2032 opts.respect_includes = 1;
2033 opts.ignore_repo = 1;
2034 opts.ignore_worktree = 1;
2035 opts.ignore_cmdline = 1;
2036 opts.system_gently = 1;
2037
2038 config_with_options(cb, data, NULL, &opts);
2039 }
2040
2041 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
2042 {
2043 struct config_set_element k;
2044 struct config_set_element *found_entry;
2045 char *normalized_key;
2046 /*
2047 * `key` may come from the user, so normalize it before using it
2048 * for querying entries from the hashmap.
2049 */
2050 if (git_config_parse_key(key, &normalized_key, NULL))
2051 return NULL;
2052
2053 hashmap_entry_init(&k.ent, strhash(normalized_key));
2054 k.key = normalized_key;
2055 found_entry = hashmap_get_entry(&cs->config_hash, &k, ent, NULL);
2056 free(normalized_key);
2057 return found_entry;
2058 }
2059
2060 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
2061 {
2062 struct config_set_element *e;
2063 struct string_list_item *si;
2064 struct configset_list_item *l_item;
2065 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
2066
2067 e = configset_find_element(cs, key);
2068 /*
2069 * Since the keys are being fed by git_config*() callback mechanism, they
2070 * are already normalized. So simply add them without any further munging.
2071 */
2072 if (!e) {
2073 e = xmalloc(sizeof(*e));
2074 hashmap_entry_init(&e->ent, strhash(key));
2075 e->key = xstrdup(key);
2076 string_list_init_dup(&e->value_list);
2077 hashmap_add(&cs->config_hash, &e->ent);
2078 }
2079 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
2080
2081 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
2082 l_item = &cs->list.items[cs->list.nr++];
2083 l_item->e = e;
2084 l_item->value_index = e->value_list.nr - 1;
2085
2086 if (!cf)
2087 BUG("configset_add_value has no source");
2088 if (cf->name) {
2089 kv_info->filename = strintern(cf->name);
2090 kv_info->linenr = cf->linenr;
2091 kv_info->origin_type = cf->origin_type;
2092 } else {
2093 /* for values read from `git_config_from_parameters()` */
2094 kv_info->filename = NULL;
2095 kv_info->linenr = -1;
2096 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
2097 }
2098 kv_info->scope = current_parsing_scope;
2099 si->util = kv_info;
2100
2101 return 0;
2102 }
2103
2104 static int config_set_element_cmp(const void *unused_cmp_data,
2105 const struct hashmap_entry *eptr,
2106 const struct hashmap_entry *entry_or_key,
2107 const void *unused_keydata)
2108 {
2109 const struct config_set_element *e1, *e2;
2110
2111 e1 = container_of(eptr, const struct config_set_element, ent);
2112 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2113
2114 return strcmp(e1->key, e2->key);
2115 }
2116
2117 void git_configset_init(struct config_set *cs)
2118 {
2119 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
2120 cs->hash_initialized = 1;
2121 cs->list.nr = 0;
2122 cs->list.alloc = 0;
2123 cs->list.items = NULL;
2124 }
2125
2126 void git_configset_clear(struct config_set *cs)
2127 {
2128 struct config_set_element *entry;
2129 struct hashmap_iter iter;
2130 if (!cs->hash_initialized)
2131 return;
2132
2133 hashmap_for_each_entry(&cs->config_hash, &iter, entry,
2134 ent /* member name */) {
2135 free(entry->key);
2136 string_list_clear(&entry->value_list, 1);
2137 }
2138 hashmap_clear_and_free(&cs->config_hash, struct config_set_element, ent);
2139 cs->hash_initialized = 0;
2140 free(cs->list.items);
2141 cs->list.nr = 0;
2142 cs->list.alloc = 0;
2143 cs->list.items = NULL;
2144 }
2145
2146 static int config_set_callback(const char *key, const char *value, void *cb)
2147 {
2148 struct config_set *cs = cb;
2149 configset_add_value(cs, key, value);
2150 return 0;
2151 }
2152
2153 int git_configset_add_file(struct config_set *cs, const char *filename)
2154 {
2155 return git_config_from_file(config_set_callback, filename, cs);
2156 }
2157
2158 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
2159 {
2160 const struct string_list *values = NULL;
2161 /*
2162 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2163 * queried key in the files of the configset, the value returned will be the last
2164 * value in the value list for that key.
2165 */
2166 values = git_configset_get_value_multi(cs, key);
2167
2168 if (!values)
2169 return 1;
2170 assert(values->nr > 0);
2171 *value = values->items[values->nr - 1].string;
2172 return 0;
2173 }
2174
2175 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
2176 {
2177 struct config_set_element *e = configset_find_element(cs, key);
2178 return e ? &e->value_list : NULL;
2179 }
2180
2181 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
2182 {
2183 const char *value;
2184 if (!git_configset_get_value(cs, key, &value))
2185 return git_config_string((const char **)dest, key, value);
2186 else
2187 return 1;
2188 }
2189
2190 int git_configset_get_string_tmp(struct config_set *cs, const char *key,
2191 const char **dest)
2192 {
2193 const char *value;
2194 if (!git_configset_get_value(cs, key, &value)) {
2195 if (!value)
2196 return config_error_nonbool(key);
2197 *dest = value;
2198 return 0;
2199 } else {
2200 return 1;
2201 }
2202 }
2203
2204 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
2205 {
2206 const char *value;
2207 if (!git_configset_get_value(cs, key, &value)) {
2208 *dest = git_config_int(key, value);
2209 return 0;
2210 } else
2211 return 1;
2212 }
2213
2214 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
2215 {
2216 const char *value;
2217 if (!git_configset_get_value(cs, key, &value)) {
2218 *dest = git_config_ulong(key, value);
2219 return 0;
2220 } else
2221 return 1;
2222 }
2223
2224 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
2225 {
2226 const char *value;
2227 if (!git_configset_get_value(cs, key, &value)) {
2228 *dest = git_config_bool(key, value);
2229 return 0;
2230 } else
2231 return 1;
2232 }
2233
2234 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
2235 int *is_bool, int *dest)
2236 {
2237 const char *value;
2238 if (!git_configset_get_value(cs, key, &value)) {
2239 *dest = git_config_bool_or_int(key, value, is_bool);
2240 return 0;
2241 } else
2242 return 1;
2243 }
2244
2245 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
2246 {
2247 const char *value;
2248 if (!git_configset_get_value(cs, key, &value)) {
2249 *dest = git_parse_maybe_bool(value);
2250 if (*dest == -1)
2251 return -1;
2252 return 0;
2253 } else
2254 return 1;
2255 }
2256
2257 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
2258 {
2259 const char *value;
2260 if (!git_configset_get_value(cs, key, &value))
2261 return git_config_pathname(dest, key, value);
2262 else
2263 return 1;
2264 }
2265
2266 /* Functions use to read configuration from a repository */
2267 static void repo_read_config(struct repository *repo)
2268 {
2269 struct config_options opts = { 0 };
2270
2271 opts.respect_includes = 1;
2272 opts.commondir = repo->commondir;
2273 opts.git_dir = repo->gitdir;
2274
2275 if (!repo->config)
2276 CALLOC_ARRAY(repo->config, 1);
2277 else
2278 git_configset_clear(repo->config);
2279
2280 git_configset_init(repo->config);
2281
2282 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
2283 /*
2284 * config_with_options() normally returns only
2285 * zero, as most errors are fatal, and
2286 * non-fatal potential errors are guarded by "if"
2287 * statements that are entered only when no error is
2288 * possible.
2289 *
2290 * If we ever encounter a non-fatal error, it means
2291 * something went really wrong and we should stop
2292 * immediately.
2293 */
2294 die(_("unknown error occurred while reading the configuration files"));
2295 }
2296
2297 static void git_config_check_init(struct repository *repo)
2298 {
2299 if (repo->config && repo->config->hash_initialized)
2300 return;
2301 repo_read_config(repo);
2302 }
2303
2304 static void repo_config_clear(struct repository *repo)
2305 {
2306 if (!repo->config || !repo->config->hash_initialized)
2307 return;
2308 git_configset_clear(repo->config);
2309 }
2310
2311 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2312 {
2313 git_config_check_init(repo);
2314 configset_iter(repo->config, fn, data);
2315 }
2316
2317 int repo_config_get_value(struct repository *repo,
2318 const char *key, const char **value)
2319 {
2320 git_config_check_init(repo);
2321 return git_configset_get_value(repo->config, key, value);
2322 }
2323
2324 const struct string_list *repo_config_get_value_multi(struct repository *repo,
2325 const char *key)
2326 {
2327 git_config_check_init(repo);
2328 return git_configset_get_value_multi(repo->config, key);
2329 }
2330
2331 int repo_config_get_string(struct repository *repo,
2332 const char *key, char **dest)
2333 {
2334 int ret;
2335 git_config_check_init(repo);
2336 ret = git_configset_get_string(repo->config, key, dest);
2337 if (ret < 0)
2338 git_die_config(key, NULL);
2339 return ret;
2340 }
2341
2342 int repo_config_get_string_tmp(struct repository *repo,
2343 const char *key, const char **dest)
2344 {
2345 int ret;
2346 git_config_check_init(repo);
2347 ret = git_configset_get_string_tmp(repo->config, key, dest);
2348 if (ret < 0)
2349 git_die_config(key, NULL);
2350 return ret;
2351 }
2352
2353 int repo_config_get_int(struct repository *repo,
2354 const char *key, int *dest)
2355 {
2356 git_config_check_init(repo);
2357 return git_configset_get_int(repo->config, key, dest);
2358 }
2359
2360 int repo_config_get_ulong(struct repository *repo,
2361 const char *key, unsigned long *dest)
2362 {
2363 git_config_check_init(repo);
2364 return git_configset_get_ulong(repo->config, key, dest);
2365 }
2366
2367 int repo_config_get_bool(struct repository *repo,
2368 const char *key, int *dest)
2369 {
2370 git_config_check_init(repo);
2371 return git_configset_get_bool(repo->config, key, dest);
2372 }
2373
2374 int repo_config_get_bool_or_int(struct repository *repo,
2375 const char *key, int *is_bool, int *dest)
2376 {
2377 git_config_check_init(repo);
2378 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2379 }
2380
2381 int repo_config_get_maybe_bool(struct repository *repo,
2382 const char *key, int *dest)
2383 {
2384 git_config_check_init(repo);
2385 return git_configset_get_maybe_bool(repo->config, key, dest);
2386 }
2387
2388 int repo_config_get_pathname(struct repository *repo,
2389 const char *key, const char **dest)
2390 {
2391 int ret;
2392 git_config_check_init(repo);
2393 ret = git_configset_get_pathname(repo->config, key, dest);
2394 if (ret < 0)
2395 git_die_config(key, NULL);
2396 return ret;
2397 }
2398
2399 /* Functions used historically to read configuration from 'the_repository' */
2400 void git_config(config_fn_t fn, void *data)
2401 {
2402 repo_config(the_repository, fn, data);
2403 }
2404
2405 void git_config_clear(void)
2406 {
2407 repo_config_clear(the_repository);
2408 }
2409
2410 int git_config_get_value(const char *key, const char **value)
2411 {
2412 return repo_config_get_value(the_repository, key, value);
2413 }
2414
2415 const struct string_list *git_config_get_value_multi(const char *key)
2416 {
2417 return repo_config_get_value_multi(the_repository, key);
2418 }
2419
2420 int git_config_get_string(const char *key, char **dest)
2421 {
2422 return repo_config_get_string(the_repository, key, dest);
2423 }
2424
2425 int git_config_get_string_tmp(const char *key, const char **dest)
2426 {
2427 return repo_config_get_string_tmp(the_repository, key, dest);
2428 }
2429
2430 int git_config_get_int(const char *key, int *dest)
2431 {
2432 return repo_config_get_int(the_repository, key, dest);
2433 }
2434
2435 int git_config_get_ulong(const char *key, unsigned long *dest)
2436 {
2437 return repo_config_get_ulong(the_repository, key, dest);
2438 }
2439
2440 int git_config_get_bool(const char *key, int *dest)
2441 {
2442 return repo_config_get_bool(the_repository, key, dest);
2443 }
2444
2445 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2446 {
2447 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2448 }
2449
2450 int git_config_get_maybe_bool(const char *key, int *dest)
2451 {
2452 return repo_config_get_maybe_bool(the_repository, key, dest);
2453 }
2454
2455 int git_config_get_pathname(const char *key, const char **dest)
2456 {
2457 return repo_config_get_pathname(the_repository, key, dest);
2458 }
2459
2460 int git_config_get_expiry(const char *key, const char **output)
2461 {
2462 int ret = git_config_get_string(key, (char **)output);
2463 if (ret)
2464 return ret;
2465 if (strcmp(*output, "now")) {
2466 timestamp_t now = approxidate("now");
2467 if (approxidate(*output) >= now)
2468 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2469 }
2470 return ret;
2471 }
2472
2473 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2474 {
2475 const char *expiry_string;
2476 intmax_t days;
2477 timestamp_t when;
2478
2479 if (git_config_get_string_tmp(key, &expiry_string))
2480 return 1; /* no such thing */
2481
2482 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2483 const int scale = 86400;
2484 *expiry = now - days * scale;
2485 return 0;
2486 }
2487
2488 if (!parse_expiry_date(expiry_string, &when)) {
2489 *expiry = when;
2490 return 0;
2491 }
2492 return -1; /* thing exists but cannot be parsed */
2493 }
2494
2495 int git_config_get_split_index(void)
2496 {
2497 int val;
2498
2499 if (!git_config_get_maybe_bool("core.splitindex", &val))
2500 return val;
2501
2502 return -1; /* default value */
2503 }
2504
2505 int git_config_get_max_percent_split_change(void)
2506 {
2507 int val = -1;
2508
2509 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2510 if (0 <= val && val <= 100)
2511 return val;
2512
2513 return error(_("splitIndex.maxPercentChange value '%d' "
2514 "should be between 0 and 100"), val);
2515 }
2516
2517 return -1; /* default value */
2518 }
2519
2520 int git_config_get_fsmonitor(void)
2521 {
2522 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2523 core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
2524
2525 if (core_fsmonitor && !*core_fsmonitor)
2526 core_fsmonitor = NULL;
2527
2528 if (core_fsmonitor)
2529 return 1;
2530
2531 return 0;
2532 }
2533
2534 int git_config_get_index_threads(int *dest)
2535 {
2536 int is_bool, val;
2537
2538 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2539 if (val) {
2540 *dest = val;
2541 return 0;
2542 }
2543
2544 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2545 if (is_bool)
2546 *dest = val ? 0 : 1;
2547 else
2548 *dest = val;
2549 return 0;
2550 }
2551
2552 return 1;
2553 }
2554
2555 NORETURN
2556 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2557 {
2558 if (!filename)
2559 die(_("unable to parse '%s' from command-line config"), key);
2560 else
2561 die(_("bad config variable '%s' in file '%s' at line %d"),
2562 key, filename, linenr);
2563 }
2564
2565 NORETURN __attribute__((format(printf, 2, 3)))
2566 void git_die_config(const char *key, const char *err, ...)
2567 {
2568 const struct string_list *values;
2569 struct key_value_info *kv_info;
2570
2571 if (err) {
2572 va_list params;
2573 va_start(params, err);
2574 vreportf("error: ", err, params);
2575 va_end(params);
2576 }
2577 values = git_config_get_value_multi(key);
2578 kv_info = values->items[values->nr - 1].util;
2579 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2580 }
2581
2582 /*
2583 * Find all the stuff for git_config_set() below.
2584 */
2585
2586 struct config_store_data {
2587 size_t baselen;
2588 char *key;
2589 int do_not_match;
2590 const char *fixed_value;
2591 regex_t *value_pattern;
2592 int multi_replace;
2593 struct {
2594 size_t begin, end;
2595 enum config_event_t type;
2596 int is_keys_section;
2597 } *parsed;
2598 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2599 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2600 };
2601
2602 static void config_store_data_clear(struct config_store_data *store)
2603 {
2604 free(store->key);
2605 if (store->value_pattern != NULL &&
2606 store->value_pattern != CONFIG_REGEX_NONE) {
2607 regfree(store->value_pattern);
2608 free(store->value_pattern);
2609 }
2610 free(store->parsed);
2611 free(store->seen);
2612 memset(store, 0, sizeof(*store));
2613 }
2614
2615 static int matches(const char *key, const char *value,
2616 const struct config_store_data *store)
2617 {
2618 if (strcmp(key, store->key))
2619 return 0; /* not ours */
2620 if (store->fixed_value)
2621 return !strcmp(store->fixed_value, value);
2622 if (!store->value_pattern)
2623 return 1; /* always matches */
2624 if (store->value_pattern == CONFIG_REGEX_NONE)
2625 return 0; /* never matches */
2626
2627 return store->do_not_match ^
2628 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
2629 }
2630
2631 static int store_aux_event(enum config_event_t type,
2632 size_t begin, size_t end, void *data)
2633 {
2634 struct config_store_data *store = data;
2635
2636 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2637 store->parsed[store->parsed_nr].begin = begin;
2638 store->parsed[store->parsed_nr].end = end;
2639 store->parsed[store->parsed_nr].type = type;
2640
2641 if (type == CONFIG_EVENT_SECTION) {
2642 int (*cmpfn)(const char *, const char *, size_t);
2643
2644 if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
2645 return error(_("invalid section name '%s'"), cf->var.buf);
2646
2647 if (cf->subsection_case_sensitive)
2648 cmpfn = strncasecmp;
2649 else
2650 cmpfn = strncmp;
2651
2652 /* Is this the section we were looking for? */
2653 store->is_keys_section =
2654 store->parsed[store->parsed_nr].is_keys_section =
2655 cf->var.len - 1 == store->baselen &&
2656 !cmpfn(cf->var.buf, store->key, store->baselen);
2657 if (store->is_keys_section) {
2658 store->section_seen = 1;
2659 ALLOC_GROW(store->seen, store->seen_nr + 1,
2660 store->seen_alloc);
2661 store->seen[store->seen_nr] = store->parsed_nr;
2662 }
2663 }
2664
2665 store->parsed_nr++;
2666
2667 return 0;
2668 }
2669
2670 static int store_aux(const char *key, const char *value, void *cb)
2671 {
2672 struct config_store_data *store = cb;
2673
2674 if (store->key_seen) {
2675 if (matches(key, value, store)) {
2676 if (store->seen_nr == 1 && store->multi_replace == 0) {
2677 warning(_("%s has multiple values"), key);
2678 }
2679
2680 ALLOC_GROW(store->seen, store->seen_nr + 1,
2681 store->seen_alloc);
2682
2683 store->seen[store->seen_nr] = store->parsed_nr;
2684 store->seen_nr++;
2685 }
2686 } else if (store->is_keys_section) {
2687 /*
2688 * Do not increment matches yet: this may not be a match, but we
2689 * are in the desired section.
2690 */
2691 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2692 store->seen[store->seen_nr] = store->parsed_nr;
2693 store->section_seen = 1;
2694
2695 if (matches(key, value, store)) {
2696 store->seen_nr++;
2697 store->key_seen = 1;
2698 }
2699 }
2700
2701 return 0;
2702 }
2703
2704 static int write_error(const char *filename)
2705 {
2706 error(_("failed to write new configuration file %s"), filename);
2707
2708 /* Same error code as "failed to rename". */
2709 return 4;
2710 }
2711
2712 static struct strbuf store_create_section(const char *key,
2713 const struct config_store_data *store)
2714 {
2715 const char *dot;
2716 size_t i;
2717 struct strbuf sb = STRBUF_INIT;
2718
2719 dot = memchr(key, '.', store->baselen);
2720 if (dot) {
2721 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2722 for (i = dot - key + 1; i < store->baselen; i++) {
2723 if (key[i] == '"' || key[i] == '\\')
2724 strbuf_addch(&sb, '\\');
2725 strbuf_addch(&sb, key[i]);
2726 }
2727 strbuf_addstr(&sb, "\"]\n");
2728 } else {
2729 strbuf_addch(&sb, '[');
2730 strbuf_add(&sb, key, store->baselen);
2731 strbuf_addstr(&sb, "]\n");
2732 }
2733
2734 return sb;
2735 }
2736
2737 static ssize_t write_section(int fd, const char *key,
2738 const struct config_store_data *store)
2739 {
2740 struct strbuf sb = store_create_section(key, store);
2741 ssize_t ret;
2742
2743 ret = write_in_full(fd, sb.buf, sb.len);
2744 strbuf_release(&sb);
2745
2746 return ret;
2747 }
2748
2749 static ssize_t write_pair(int fd, const char *key, const char *value,
2750 const struct config_store_data *store)
2751 {
2752 int i;
2753 ssize_t ret;
2754 const char *quote = "";
2755 struct strbuf sb = STRBUF_INIT;
2756
2757 /*
2758 * Check to see if the value needs to be surrounded with a dq pair.
2759 * Note that problematic characters are always backslash-quoted; this
2760 * check is about not losing leading or trailing SP and strings that
2761 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2762 * configuration parser.
2763 */
2764 if (value[0] == ' ')
2765 quote = "\"";
2766 for (i = 0; value[i]; i++)
2767 if (value[i] == ';' || value[i] == '#')
2768 quote = "\"";
2769 if (i && value[i - 1] == ' ')
2770 quote = "\"";
2771
2772 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
2773
2774 for (i = 0; value[i]; i++)
2775 switch (value[i]) {
2776 case '\n':
2777 strbuf_addstr(&sb, "\\n");
2778 break;
2779 case '\t':
2780 strbuf_addstr(&sb, "\\t");
2781 break;
2782 case '"':
2783 case '\\':
2784 strbuf_addch(&sb, '\\');
2785 /* fallthrough */
2786 default:
2787 strbuf_addch(&sb, value[i]);
2788 break;
2789 }
2790 strbuf_addf(&sb, "%s\n", quote);
2791
2792 ret = write_in_full(fd, sb.buf, sb.len);
2793 strbuf_release(&sb);
2794
2795 return ret;
2796 }
2797
2798 /*
2799 * If we are about to unset the last key(s) in a section, and if there are
2800 * no comments surrounding (or included in) the section, we will want to
2801 * extend begin/end to remove the entire section.
2802 *
2803 * Note: the parameter `seen_ptr` points to the index into the store.seen
2804 * array. * This index may be incremented if a section has more than one
2805 * entry (which all are to be removed).
2806 */
2807 static void maybe_remove_section(struct config_store_data *store,
2808 size_t *begin_offset, size_t *end_offset,
2809 int *seen_ptr)
2810 {
2811 size_t begin;
2812 int i, seen, section_seen = 0;
2813
2814 /*
2815 * First, ensure that this is the first key, and that there are no
2816 * comments before the entry nor before the section header.
2817 */
2818 seen = *seen_ptr;
2819 for (i = store->seen[seen]; i > 0; i--) {
2820 enum config_event_t type = store->parsed[i - 1].type;
2821
2822 if (type == CONFIG_EVENT_COMMENT)
2823 /* There is a comment before this entry or section */
2824 return;
2825 if (type == CONFIG_EVENT_ENTRY) {
2826 if (!section_seen)
2827 /* This is not the section's first entry. */
2828 return;
2829 /* We encountered no comment before the section. */
2830 break;
2831 }
2832 if (type == CONFIG_EVENT_SECTION) {
2833 if (!store->parsed[i - 1].is_keys_section)
2834 break;
2835 section_seen = 1;
2836 }
2837 }
2838 begin = store->parsed[i].begin;
2839
2840 /*
2841 * Next, make sure that we are removing the last key(s) in the section,
2842 * and that there are no comments that are possibly about the current
2843 * section.
2844 */
2845 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
2846 enum config_event_t type = store->parsed[i].type;
2847
2848 if (type == CONFIG_EVENT_COMMENT)
2849 return;
2850 if (type == CONFIG_EVENT_SECTION) {
2851 if (store->parsed[i].is_keys_section)
2852 continue;
2853 break;
2854 }
2855 if (type == CONFIG_EVENT_ENTRY) {
2856 if (++seen < store->seen_nr &&
2857 i == store->seen[seen])
2858 /* We want to remove this entry, too */
2859 continue;
2860 /* There is another entry in this section. */
2861 return;
2862 }
2863 }
2864
2865 /*
2866 * We are really removing the last entry/entries from this section, and
2867 * there are no enclosed or surrounding comments. Remove the entire,
2868 * now-empty section.
2869 */
2870 *seen_ptr = seen;
2871 *begin_offset = begin;
2872 if (i < store->parsed_nr)
2873 *end_offset = store->parsed[i].begin;
2874 else
2875 *end_offset = store->parsed[store->parsed_nr - 1].end;
2876 }
2877
2878 int git_config_set_in_file_gently(const char *config_filename,
2879 const char *key, const char *value)
2880 {
2881 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2882 }
2883
2884 void git_config_set_in_file(const char *config_filename,
2885 const char *key, const char *value)
2886 {
2887 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2888 }
2889
2890 int git_config_set_gently(const char *key, const char *value)
2891 {
2892 return git_config_set_multivar_gently(key, value, NULL, 0);
2893 }
2894
2895 void git_config_set(const char *key, const char *value)
2896 {
2897 git_config_set_multivar(key, value, NULL, 0);
2898
2899 trace2_cmd_set_config(key, value);
2900 }
2901
2902 /*
2903 * If value==NULL, unset in (remove from) config,
2904 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
2905 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
2906 * (only add a new one)
2907 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
2908 * key/values are removed before a single new pair is written. If the
2909 * flag is not present, then replace only the first match.
2910 *
2911 * Returns 0 on success.
2912 *
2913 * This function does this:
2914 *
2915 * - it locks the config file by creating ".git/config.lock"
2916 *
2917 * - it then parses the config using store_aux() as validator to find
2918 * the position on the key/value pair to replace. If it is to be unset,
2919 * it must be found exactly once.
2920 *
2921 * - the config file is mmap()ed and the part before the match (if any) is
2922 * written to the lock file, then the changed part and the rest.
2923 *
2924 * - the config file is removed and the lock file rename()d to it.
2925 *
2926 */
2927 int git_config_set_multivar_in_file_gently(const char *config_filename,
2928 const char *key, const char *value,
2929 const char *value_pattern,
2930 unsigned flags)
2931 {
2932 int fd = -1, in_fd = -1;
2933 int ret;
2934 struct lock_file lock = LOCK_INIT;
2935 char *filename_buf = NULL;
2936 char *contents = NULL;
2937 size_t contents_sz;
2938 struct config_store_data store;
2939
2940 memset(&store, 0, sizeof(store));
2941
2942 /* parse-key returns negative; flip the sign to feed exit(3) */
2943 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2944 if (ret)
2945 goto out_free;
2946
2947 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
2948
2949 if (!config_filename)
2950 config_filename = filename_buf = git_pathdup("config");
2951
2952 /*
2953 * The lock serves a purpose in addition to locking: the new
2954 * contents of .git/config will be written into it.
2955 */
2956 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2957 if (fd < 0) {
2958 error_errno(_("could not lock config file %s"), config_filename);
2959 ret = CONFIG_NO_LOCK;
2960 goto out_free;
2961 }
2962
2963 /*
2964 * If .git/config does not exist yet, write a minimal version.
2965 */
2966 in_fd = open(config_filename, O_RDONLY);
2967 if ( in_fd < 0 ) {
2968 if ( ENOENT != errno ) {
2969 error_errno(_("opening %s"), config_filename);
2970 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2971 goto out_free;
2972 }
2973 /* if nothing to unset, error out */
2974 if (value == NULL) {
2975 ret = CONFIG_NOTHING_SET;
2976 goto out_free;
2977 }
2978
2979 free(store.key);
2980 store.key = xstrdup(key);
2981 if (write_section(fd, key, &store) < 0 ||
2982 write_pair(fd, key, value, &store) < 0)
2983 goto write_err_out;
2984 } else {
2985 struct stat st;
2986 size_t copy_begin, copy_end;
2987 int i, new_line = 0;
2988 struct config_options opts;
2989
2990 if (value_pattern == NULL)
2991 store.value_pattern = NULL;
2992 else if (value_pattern == CONFIG_REGEX_NONE)
2993 store.value_pattern = CONFIG_REGEX_NONE;
2994 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
2995 store.fixed_value = value_pattern;
2996 else {
2997 if (value_pattern[0] == '!') {
2998 store.do_not_match = 1;
2999 value_pattern++;
3000 } else
3001 store.do_not_match = 0;
3002
3003 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3004 if (regcomp(store.value_pattern, value_pattern,
3005 REG_EXTENDED)) {
3006 error(_("invalid pattern: %s"), value_pattern);
3007 FREE_AND_NULL(store.value_pattern);
3008 ret = CONFIG_INVALID_PATTERN;
3009 goto out_free;
3010 }
3011 }
3012
3013 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3014 store.parsed[0].end = 0;
3015
3016 memset(&opts, 0, sizeof(opts));
3017 opts.event_fn = store_aux_event;
3018 opts.event_fn_data = &store;
3019
3020 /*
3021 * After this, store.parsed will contain offsets of all the
3022 * parsed elements, and store.seen will contain a list of
3023 * matches, as indices into store.parsed.
3024 *
3025 * As a side effect, we make sure to transform only a valid
3026 * existing config file.
3027 */
3028 if (git_config_from_file_with_options(store_aux,
3029 config_filename,
3030 &store, &opts)) {
3031 error(_("invalid config file %s"), config_filename);
3032 ret = CONFIG_INVALID_FILE;
3033 goto out_free;
3034 }
3035
3036 /* if nothing to unset, or too many matches, error out */
3037 if ((store.seen_nr == 0 && value == NULL) ||
3038 (store.seen_nr > 1 && !store.multi_replace)) {
3039 ret = CONFIG_NOTHING_SET;
3040 goto out_free;
3041 }
3042
3043 if (fstat(in_fd, &st) == -1) {
3044 error_errno(_("fstat on %s failed"), config_filename);
3045 ret = CONFIG_INVALID_FILE;
3046 goto out_free;
3047 }
3048
3049 contents_sz = xsize_t(st.st_size);
3050 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3051 MAP_PRIVATE, in_fd, 0);
3052 if (contents == MAP_FAILED) {
3053 if (errno == ENODEV && S_ISDIR(st.st_mode))
3054 errno = EISDIR;
3055 error_errno(_("unable to mmap '%s'%s"),
3056 config_filename, mmap_os_err());
3057 ret = CONFIG_INVALID_FILE;
3058 contents = NULL;
3059 goto out_free;
3060 }
3061 close(in_fd);
3062 in_fd = -1;
3063
3064 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3065 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3066 ret = CONFIG_NO_WRITE;
3067 goto out_free;
3068 }
3069
3070 if (store.seen_nr == 0) {
3071 if (!store.seen_alloc) {
3072 /* Did not see key nor section */
3073 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3074 store.seen[0] = store.parsed_nr
3075 - !!store.parsed_nr;
3076 }
3077 store.seen_nr = 1;
3078 }
3079
3080 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3081 size_t replace_end;
3082 int j = store.seen[i];
3083
3084 new_line = 0;
3085 if (!store.key_seen) {
3086 copy_end = store.parsed[j].end;
3087 /* include '\n' when copying section header */
3088 if (copy_end > 0 && copy_end < contents_sz &&
3089 contents[copy_end - 1] != '\n' &&
3090 contents[copy_end] == '\n')
3091 copy_end++;
3092 replace_end = copy_end;
3093 } else {
3094 replace_end = store.parsed[j].end;
3095 copy_end = store.parsed[j].begin;
3096 if (!value)
3097 maybe_remove_section(&store,
3098 &copy_end,
3099 &replace_end, &i);
3100 /*
3101 * Swallow preceding white-space on the same
3102 * line.
3103 */
3104 while (copy_end > 0 ) {
3105 char c = contents[copy_end - 1];
3106
3107 if (isspace(c) && c != '\n')
3108 copy_end--;
3109 else
3110 break;
3111 }
3112 }
3113
3114 if (copy_end > 0 && contents[copy_end-1] != '\n')
3115 new_line = 1;
3116
3117 /* write the first part of the config */
3118 if (copy_end > copy_begin) {
3119 if (write_in_full(fd, contents + copy_begin,
3120 copy_end - copy_begin) < 0)
3121 goto write_err_out;
3122 if (new_line &&
3123 write_str_in_full(fd, "\n") < 0)
3124 goto write_err_out;
3125 }
3126 copy_begin = replace_end;
3127 }
3128
3129 /* write the pair (value == NULL means unset) */
3130 if (value != NULL) {
3131 if (!store.section_seen) {
3132 if (write_section(fd, key, &store) < 0)
3133 goto write_err_out;
3134 }
3135 if (write_pair(fd, key, value, &store) < 0)
3136 goto write_err_out;
3137 }
3138
3139 /* write the rest of the config */
3140 if (copy_begin < contents_sz)
3141 if (write_in_full(fd, contents + copy_begin,
3142 contents_sz - copy_begin) < 0)
3143 goto write_err_out;
3144
3145 munmap(contents, contents_sz);
3146 contents = NULL;
3147 }
3148
3149 if (commit_lock_file(&lock) < 0) {
3150 error_errno(_("could not write config file %s"), config_filename);
3151 ret = CONFIG_NO_WRITE;
3152 goto out_free;
3153 }
3154
3155 ret = 0;
3156
3157 /* Invalidate the config cache */
3158 git_config_clear();
3159
3160 out_free:
3161 rollback_lock_file(&lock);
3162 free(filename_buf);
3163 if (contents)
3164 munmap(contents, contents_sz);
3165 if (in_fd >= 0)
3166 close(in_fd);
3167 config_store_data_clear(&store);
3168 return ret;
3169
3170 write_err_out:
3171 ret = write_error(get_lock_file_path(&lock));
3172 goto out_free;
3173
3174 }
3175
3176 void git_config_set_multivar_in_file(const char *config_filename,
3177 const char *key, const char *value,
3178 const char *value_pattern, unsigned flags)
3179 {
3180 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
3181 value_pattern, flags))
3182 return;
3183 if (value)
3184 die(_("could not set '%s' to '%s'"), key, value);
3185 else
3186 die(_("could not unset '%s'"), key);
3187 }
3188
3189 int git_config_set_multivar_gently(const char *key, const char *value,
3190 const char *value_pattern, unsigned flags)
3191 {
3192 return git_config_set_multivar_in_file_gently(NULL, key, value, value_pattern,
3193 flags);
3194 }
3195
3196 void git_config_set_multivar(const char *key, const char *value,
3197 const char *value_pattern, unsigned flags)
3198 {
3199 git_config_set_multivar_in_file(NULL, key, value, value_pattern,
3200 flags);
3201 }
3202
3203 static int section_name_match (const char *buf, const char *name)
3204 {
3205 int i = 0, j = 0, dot = 0;
3206 if (buf[i] != '[')
3207 return 0;
3208 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3209 if (!dot && isspace(buf[i])) {
3210 dot = 1;
3211 if (name[j++] != '.')
3212 break;
3213 for (i++; isspace(buf[i]); i++)
3214 ; /* do nothing */
3215 if (buf[i] != '"')
3216 break;
3217 continue;
3218 }
3219 if (buf[i] == '\\' && dot)
3220 i++;
3221 else if (buf[i] == '"' && dot) {
3222 for (i++; isspace(buf[i]); i++)
3223 ; /* do_nothing */
3224 break;
3225 }
3226 if (buf[i] != name[j++])
3227 break;
3228 }
3229 if (buf[i] == ']' && name[j] == 0) {
3230 /*
3231 * We match, now just find the right length offset by
3232 * gobbling up any whitespace after it, as well
3233 */
3234 i++;
3235 for (; buf[i] && isspace(buf[i]); i++)
3236 ; /* do nothing */
3237 return i;
3238 }
3239 return 0;
3240 }
3241
3242 static int section_name_is_ok(const char *name)
3243 {
3244 /* Empty section names are bogus. */
3245 if (!*name)
3246 return 0;
3247
3248 /*
3249 * Before a dot, we must be alphanumeric or dash. After the first dot,
3250 * anything goes, so we can stop checking.
3251 */
3252 for (; *name && *name != '.'; name++)
3253 if (*name != '-' && !isalnum(*name))
3254 return 0;
3255 return 1;
3256 }
3257
3258 /* if new_name == NULL, the section is removed instead */
3259 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3260 const char *old_name,
3261 const char *new_name, int copy)
3262 {
3263 int ret = 0, remove = 0;
3264 char *filename_buf = NULL;
3265 struct lock_file lock = LOCK_INIT;
3266 int out_fd;
3267 char buf[1024];
3268 FILE *config_file = NULL;
3269 struct stat st;
3270 struct strbuf copystr = STRBUF_INIT;
3271 struct config_store_data store;
3272
3273 memset(&store, 0, sizeof(store));
3274
3275 if (new_name && !section_name_is_ok(new_name)) {
3276 ret = error(_("invalid section name: %s"), new_name);
3277 goto out_no_rollback;
3278 }
3279
3280 if (!config_filename)
3281 config_filename = filename_buf = git_pathdup("config");
3282
3283 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3284 if (out_fd < 0) {
3285 ret = error(_("could not lock config file %s"), config_filename);
3286 goto out;
3287 }
3288
3289 if (!(config_file = fopen(config_filename, "rb"))) {
3290 ret = warn_on_fopen_errors(config_filename);
3291 if (ret)
3292 goto out;
3293 /* no config file means nothing to rename, no error */
3294 goto commit_and_out;
3295 }
3296
3297 if (fstat(fileno(config_file), &st) == -1) {
3298 ret = error_errno(_("fstat on %s failed"), config_filename);
3299 goto out;
3300 }
3301
3302 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3303 ret = error_errno(_("chmod on %s failed"),
3304 get_lock_file_path(&lock));
3305 goto out;
3306 }
3307
3308 while (fgets(buf, sizeof(buf), config_file)) {
3309 unsigned i;
3310 int length;
3311 int is_section = 0;
3312 char *output = buf;
3313 for (i = 0; buf[i] && isspace(buf[i]); i++)
3314 ; /* do nothing */
3315 if (buf[i] == '[') {
3316 /* it's a section */
3317 int offset;
3318 is_section = 1;
3319
3320 /*
3321 * When encountering a new section under -c we
3322 * need to flush out any section we're already
3323 * coping and begin anew. There might be
3324 * multiple [branch "$name"] sections.
3325 */
3326 if (copystr.len > 0) {
3327 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3328 ret = write_error(get_lock_file_path(&lock));
3329 goto out;
3330 }
3331 strbuf_reset(&copystr);
3332 }
3333
3334 offset = section_name_match(&buf[i], old_name);
3335 if (offset > 0) {
3336 ret++;
3337 if (new_name == NULL) {
3338 remove = 1;
3339 continue;
3340 }
3341 store.baselen = strlen(new_name);
3342 if (!copy) {
3343 if (write_section(out_fd, new_name, &store) < 0) {
3344 ret = write_error(get_lock_file_path(&lock));
3345 goto out;
3346 }
3347 /*
3348 * We wrote out the new section, with
3349 * a newline, now skip the old
3350 * section's length
3351 */
3352 output += offset + i;
3353 if (strlen(output) > 0) {
3354 /*
3355 * More content means there's
3356 * a declaration to put on the
3357 * next line; indent with a
3358 * tab
3359 */
3360 output -= 1;
3361 output[0] = '\t';
3362 }
3363 } else {
3364 copystr = store_create_section(new_name, &store);
3365 }
3366 }
3367 remove = 0;
3368 }
3369 if (remove)
3370 continue;
3371 length = strlen(output);
3372
3373 if (!is_section && copystr.len > 0) {
3374 strbuf_add(&copystr, output, length);
3375 }
3376
3377 if (write_in_full(out_fd, output, length) < 0) {
3378 ret = write_error(get_lock_file_path(&lock));
3379 goto out;
3380 }
3381 }
3382
3383 /*
3384 * Copy a trailing section at the end of the config, won't be
3385 * flushed by the usual "flush because we have a new section
3386 * logic in the loop above.
3387 */
3388 if (copystr.len > 0) {
3389 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3390 ret = write_error(get_lock_file_path(&lock));
3391 goto out;
3392 }
3393 strbuf_reset(&copystr);
3394 }
3395
3396 fclose(config_file);
3397 config_file = NULL;
3398 commit_and_out:
3399 if (commit_lock_file(&lock) < 0)
3400 ret = error_errno(_("could not write config file %s"),
3401 config_filename);
3402 out:
3403 if (config_file)
3404 fclose(config_file);
3405 rollback_lock_file(&lock);
3406 out_no_rollback:
3407 free(filename_buf);
3408 config_store_data_clear(&store);
3409 return ret;
3410 }
3411
3412 int git_config_rename_section_in_file(const char *config_filename,
3413 const char *old_name, const char *new_name)
3414 {
3415 return git_config_copy_or_rename_section_in_file(config_filename,
3416 old_name, new_name, 0);
3417 }
3418
3419 int git_config_rename_section(const char *old_name, const char *new_name)
3420 {
3421 return git_config_rename_section_in_file(NULL, old_name, new_name);
3422 }
3423
3424 int git_config_copy_section_in_file(const char *config_filename,
3425 const char *old_name, const char *new_name)
3426 {
3427 return git_config_copy_or_rename_section_in_file(config_filename,
3428 old_name, new_name, 1);
3429 }
3430
3431 int git_config_copy_section(const char *old_name, const char *new_name)
3432 {
3433 return git_config_copy_section_in_file(NULL, old_name, new_name);
3434 }
3435
3436 /*
3437 * Call this to report error for your variable that should not
3438 * get a boolean value (i.e. "[my] var" means "true").
3439 */
3440 #undef config_error_nonbool
3441 int config_error_nonbool(const char *var)
3442 {
3443 return error(_("missing value for '%s'"), var);
3444 }
3445
3446 int parse_config_key(const char *var,
3447 const char *section,
3448 const char **subsection, size_t *subsection_len,
3449 const char **key)
3450 {
3451 const char *dot;
3452
3453 /* Does it start with "section." ? */
3454 if (!skip_prefix(var, section, &var) || *var != '.')
3455 return -1;
3456
3457 /*
3458 * Find the key; we don't know yet if we have a subsection, but we must
3459 * parse backwards from the end, since the subsection may have dots in
3460 * it, too.
3461 */
3462 dot = strrchr(var, '.');
3463 *key = dot + 1;
3464
3465 /* Did we have a subsection at all? */
3466 if (dot == var) {
3467 if (subsection) {
3468 *subsection = NULL;
3469 *subsection_len = 0;
3470 }
3471 }
3472 else {
3473 if (!subsection)
3474 return -1;
3475 *subsection = var + 1;
3476 *subsection_len = dot - *subsection;
3477 }
3478
3479 return 0;
3480 }
3481
3482 const char *current_config_origin_type(void)
3483 {
3484 int type;
3485 if (current_config_kvi)
3486 type = current_config_kvi->origin_type;
3487 else if(cf)
3488 type = cf->origin_type;
3489 else
3490 BUG("current_config_origin_type called outside config callback");
3491
3492 switch (type) {
3493 case CONFIG_ORIGIN_BLOB:
3494 return "blob";
3495 case CONFIG_ORIGIN_FILE:
3496 return "file";
3497 case CONFIG_ORIGIN_STDIN:
3498 return "standard input";
3499 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3500 return "submodule-blob";
3501 case CONFIG_ORIGIN_CMDLINE:
3502 return "command line";
3503 default:
3504 BUG("unknown config origin type");
3505 }
3506 }
3507
3508 const char *config_scope_name(enum config_scope scope)
3509 {
3510 switch (scope) {
3511 case CONFIG_SCOPE_SYSTEM:
3512 return "system";
3513 case CONFIG_SCOPE_GLOBAL:
3514 return "global";
3515 case CONFIG_SCOPE_LOCAL:
3516 return "local";
3517 case CONFIG_SCOPE_WORKTREE:
3518 return "worktree";
3519 case CONFIG_SCOPE_COMMAND:
3520 return "command";
3521 case CONFIG_SCOPE_SUBMODULE:
3522 return "submodule";
3523 default:
3524 return "unknown";
3525 }
3526 }
3527
3528 const char *current_config_name(void)
3529 {
3530 const char *name;
3531 if (current_config_kvi)
3532 name = current_config_kvi->filename;
3533 else if (cf)
3534 name = cf->name;
3535 else
3536 BUG("current_config_name called outside config callback");
3537 return name ? name : "";
3538 }
3539
3540 enum config_scope current_config_scope(void)
3541 {
3542 if (current_config_kvi)
3543 return current_config_kvi->scope;
3544 else
3545 return current_parsing_scope;
3546 }
3547
3548 int current_config_line(void)
3549 {
3550 if (current_config_kvi)
3551 return current_config_kvi->linenr;
3552 else
3553 return cf->linenr;
3554 }
3555
3556 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3557 {
3558 int i;
3559
3560 for (i = 0; i < nr_mapping; i++) {
3561 const char *name = mapping[i];
3562
3563 if (name && !strcasecmp(var, name))
3564 return i;
3565 }
3566 return -1;
3567 }