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sequencer: handle multi-byte comment characters when writing todo list
[git.git] / config.c
blob7e5dbca4bdb792a9f4ead8223a76f6db704509ae
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 "git-compat-util.h"
9 #include "abspath.h"
10 #include "advice.h"
11 #include "date.h"
12 #include "branch.h"
13 #include "config.h"
14 #include "parse.h"
15 #include "convert.h"
16 #include "environment.h"
17 #include "gettext.h"
18 #include "ident.h"
19 #include "repository.h"
20 #include "lockfile.h"
21 #include "mailmap.h"
22 #include "attr.h"
23 #include "exec-cmd.h"
24 #include "strbuf.h"
25 #include "quote.h"
26 #include "hashmap.h"
27 #include "string-list.h"
28 #include "object-name.h"
29 #include "object-store-ll.h"
30 #include "pager.h"
31 #include "path.h"
32 #include "utf8.h"
33 #include "color.h"
34 #include "refs.h"
35 #include "setup.h"
36 #include "strvec.h"
37 #include "trace2.h"
38 #include "wildmatch.h"
39 #include "ws.h"
40 #include "write-or-die.h"
41
42 struct config_source {
43 struct config_source *prev;
44 union {
45 FILE *file;
46 struct config_buf {
47 const char *buf;
48 size_t len;
49 size_t pos;
50 } buf;
51 } u;
52 enum config_origin_type origin_type;
53 const char *name;
54 const char *path;
55 enum config_error_action default_error_action;
56 int linenr;
57 int eof;
58 size_t total_len;
59 struct strbuf value;
60 struct strbuf var;
61 unsigned subsection_case_sensitive : 1;
62
63 int (*do_fgetc)(struct config_source *c);
64 int (*do_ungetc)(int c, struct config_source *conf);
65 long (*do_ftell)(struct config_source *c);
66 };
67 #define CONFIG_SOURCE_INIT { 0 }
68
69 static int pack_compression_seen;
70 static int zlib_compression_seen;
71
72 /*
73 * Config that comes from trusted scopes, namely:
74 * - CONFIG_SCOPE_SYSTEM (e.g. /etc/gitconfig)
75 * - CONFIG_SCOPE_GLOBAL (e.g. $HOME/.gitconfig, $XDG_CONFIG_HOME/git)
76 * - CONFIG_SCOPE_COMMAND (e.g. "-c" option, environment variables)
77 *
78 * This is declared here for code cleanliness, but unlike the other
79 * static variables, this does not hold config parser state.
80 */
81 static struct config_set protected_config;
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 static int config_buf_fgetc(struct config_source *conf)
99 {
100 if (conf->u.buf.pos < conf->u.buf.len)
101 return conf->u.buf.buf[conf->u.buf.pos++];
102
103 return EOF;
104 }
105
106 static int config_buf_ungetc(int c, struct config_source *conf)
107 {
108 if (conf->u.buf.pos > 0) {
109 conf->u.buf.pos--;
110 if (conf->u.buf.buf[conf->u.buf.pos] != c)
111 BUG("config_buf can only ungetc the same character");
112 return c;
113 }
114
115 return EOF;
116 }
117
118 static long config_buf_ftell(struct config_source *conf)
119 {
120 return conf->u.buf.pos;
121 }
122
123 struct config_include_data {
124 int depth;
125 config_fn_t fn;
126 void *data;
127 const struct config_options *opts;
128 struct git_config_source *config_source;
129 struct repository *repo;
130
131 /*
132 * All remote URLs discovered when reading all config files.
133 */
134 struct string_list *remote_urls;
135 };
136 #define CONFIG_INCLUDE_INIT { 0 }
137
138 static int git_config_include(const char *var, const char *value,
139 const struct config_context *ctx, void *data);
140
141 #define MAX_INCLUDE_DEPTH 10
142 static const char include_depth_advice[] = N_(
143 "exceeded maximum include depth (%d) while including\n"
144 " %s\n"
145 "from\n"
146 " %s\n"
147 "This might be due to circular includes.");
148 static int handle_path_include(const struct key_value_info *kvi,
149 const char *path,
150 struct config_include_data *inc)
151 {
152 int ret = 0;
153 struct strbuf buf = STRBUF_INIT;
154 char *expanded;
155
156 if (!path)
157 return config_error_nonbool("include.path");
158
159 expanded = interpolate_path(path, 0);
160 if (!expanded)
161 return error(_("could not expand include path '%s'"), path);
162 path = expanded;
163
164 /*
165 * Use an absolute path as-is, but interpret relative paths
166 * based on the including config file.
167 */
168 if (!is_absolute_path(path)) {
169 char *slash;
170
171 if (!kvi || !kvi->path) {
172 ret = error(_("relative config includes must come from files"));
173 goto cleanup;
174 }
175
176 slash = find_last_dir_sep(kvi->path);
177 if (slash)
178 strbuf_add(&buf, kvi->path, slash - kvi->path + 1);
179 strbuf_addstr(&buf, path);
180 path = buf.buf;
181 }
182
183 if (!access_or_die(path, R_OK, 0)) {
184 if (++inc->depth > MAX_INCLUDE_DEPTH)
185 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
186 !kvi ? "<unknown>" :
187 kvi->filename ? kvi->filename :
188 "the command line");
189 ret = git_config_from_file_with_options(git_config_include, path, inc,
190 kvi->scope, NULL);
191 inc->depth--;
192 }
193 cleanup:
194 strbuf_release(&buf);
195 free(expanded);
196 return ret;
197 }
198
199 static void add_trailing_starstar_for_dir(struct strbuf *pat)
200 {
201 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
202 strbuf_addstr(pat, "**");
203 }
204
205 static int prepare_include_condition_pattern(const struct key_value_info *kvi,
206 struct strbuf *pat)
207 {
208 struct strbuf path = STRBUF_INIT;
209 char *expanded;
210 int prefix = 0;
211
212 expanded = interpolate_path(pat->buf, 1);
213 if (expanded) {
214 strbuf_reset(pat);
215 strbuf_addstr(pat, expanded);
216 free(expanded);
217 }
218
219 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
220 const char *slash;
221
222 if (!kvi || !kvi->path)
223 return error(_("relative config include "
224 "conditionals must come from files"));
225
226 strbuf_realpath(&path, kvi->path, 1);
227 slash = find_last_dir_sep(path.buf);
228 if (!slash)
229 BUG("how is this possible?");
230 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
231 prefix = slash - path.buf + 1 /* slash */;
232 } else if (!is_absolute_path(pat->buf))
233 strbuf_insertstr(pat, 0, "**/");
234
235 add_trailing_starstar_for_dir(pat);
236
237 strbuf_release(&path);
238 return prefix;
239 }
240
241 static int include_by_gitdir(const struct key_value_info *kvi,
242 const struct config_options *opts,
243 const char *cond, size_t cond_len, int icase)
244 {
245 struct strbuf text = STRBUF_INIT;
246 struct strbuf pattern = STRBUF_INIT;
247 int ret = 0, prefix;
248 const char *git_dir;
249 int already_tried_absolute = 0;
250
251 if (opts->git_dir)
252 git_dir = opts->git_dir;
253 else
254 goto done;
255
256 strbuf_realpath(&text, git_dir, 1);
257 strbuf_add(&pattern, cond, cond_len);
258 prefix = prepare_include_condition_pattern(kvi, &pattern);
259
260 again:
261 if (prefix < 0)
262 goto done;
263
264 if (prefix > 0) {
265 /*
266 * perform literal matching on the prefix part so that
267 * any wildcard character in it can't create side effects.
268 */
269 if (text.len < prefix)
270 goto done;
271 if (!icase && strncmp(pattern.buf, text.buf, prefix))
272 goto done;
273 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
274 goto done;
275 }
276
277 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
278 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
279
280 if (!ret && !already_tried_absolute) {
281 /*
282 * We've tried e.g. matching gitdir:~/work, but if
283 * ~/work is a symlink to /mnt/storage/work
284 * strbuf_realpath() will expand it, so the rule won't
285 * match. Let's match against a
286 * strbuf_add_absolute_path() version of the path,
287 * which'll do the right thing
288 */
289 strbuf_reset(&text);
290 strbuf_add_absolute_path(&text, git_dir);
291 already_tried_absolute = 1;
292 goto again;
293 }
294 done:
295 strbuf_release(&pattern);
296 strbuf_release(&text);
297 return ret;
298 }
299
300 static int include_by_branch(const char *cond, size_t cond_len)
301 {
302 int flags;
303 int ret;
304 struct strbuf pattern = STRBUF_INIT;
305 const char *refname = !the_repository->gitdir ?
306 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
307 const char *shortname;
308
309 if (!refname || !(flags & REF_ISSYMREF) ||
310 !skip_prefix(refname, "refs/heads/", &shortname))
311 return 0;
312
313 strbuf_add(&pattern, cond, cond_len);
314 add_trailing_starstar_for_dir(&pattern);
315 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
316 strbuf_release(&pattern);
317 return ret;
318 }
319
320 static int add_remote_url(const char *var, const char *value,
321 const struct config_context *ctx UNUSED, void *data)
322 {
323 struct string_list *remote_urls = data;
324 const char *remote_name;
325 size_t remote_name_len;
326 const char *key;
327
328 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
329 &key) &&
330 remote_name &&
331 !strcmp(key, "url"))
332 string_list_append(remote_urls, value);
333 return 0;
334 }
335
336 static void populate_remote_urls(struct config_include_data *inc)
337 {
338 struct config_options opts;
339
340 opts = *inc->opts;
341 opts.unconditional_remote_url = 1;
342
343 inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
344 string_list_init_dup(inc->remote_urls);
345 config_with_options(add_remote_url, inc->remote_urls,
346 inc->config_source, inc->repo, &opts);
347 }
348
349 static int forbid_remote_url(const char *var, const char *value UNUSED,
350 const struct config_context *ctx UNUSED,
351 void *data UNUSED)
352 {
353 const char *remote_name;
354 size_t remote_name_len;
355 const char *key;
356
357 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
358 &key) &&
359 remote_name &&
360 !strcmp(key, "url"))
361 die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url"));
362 return 0;
363 }
364
365 static int at_least_one_url_matches_glob(const char *glob, int glob_len,
366 struct string_list *remote_urls)
367 {
368 struct strbuf pattern = STRBUF_INIT;
369 struct string_list_item *url_item;
370 int found = 0;
371
372 strbuf_add(&pattern, glob, glob_len);
373 for_each_string_list_item(url_item, remote_urls) {
374 if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) {
375 found = 1;
376 break;
377 }
378 }
379 strbuf_release(&pattern);
380 return found;
381 }
382
383 static int include_by_remote_url(struct config_include_data *inc,
384 const char *cond, size_t cond_len)
385 {
386 if (inc->opts->unconditional_remote_url)
387 return 1;
388 if (!inc->remote_urls)
389 populate_remote_urls(inc);
390 return at_least_one_url_matches_glob(cond, cond_len,
391 inc->remote_urls);
392 }
393
394 static int include_condition_is_true(const struct key_value_info *kvi,
395 struct config_include_data *inc,
396 const char *cond, size_t cond_len)
397 {
398 const struct config_options *opts = inc->opts;
399
400 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
401 return include_by_gitdir(kvi, opts, cond, cond_len, 0);
402 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
403 return include_by_gitdir(kvi, opts, cond, cond_len, 1);
404 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
405 return include_by_branch(cond, cond_len);
406 else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond,
407 &cond_len))
408 return include_by_remote_url(inc, cond, cond_len);
409
410 /* unknown conditionals are always false */
411 return 0;
412 }
413
414 static int git_config_include(const char *var, const char *value,
415 const struct config_context *ctx,
416 void *data)
417 {
418 struct config_include_data *inc = data;
419 const char *cond, *key;
420 size_t cond_len;
421 int ret;
422
423 /*
424 * Pass along all values, including "include" directives; this makes it
425 * possible to query information on the includes themselves.
426 */
427 ret = inc->fn(var, value, ctx, inc->data);
428 if (ret < 0)
429 return ret;
430
431 if (!strcmp(var, "include.path"))
432 ret = handle_path_include(ctx->kvi, value, inc);
433
434 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
435 cond && include_condition_is_true(ctx->kvi, inc, cond, cond_len) &&
436 !strcmp(key, "path")) {
437 config_fn_t old_fn = inc->fn;
438
439 if (inc->opts->unconditional_remote_url)
440 inc->fn = forbid_remote_url;
441 ret = handle_path_include(ctx->kvi, value, inc);
442 inc->fn = old_fn;
443 }
444
445 return ret;
446 }
447
448 static void git_config_push_split_parameter(const char *key, const char *value)
449 {
450 struct strbuf env = STRBUF_INIT;
451 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
452 if (old && *old) {
453 strbuf_addstr(&env, old);
454 strbuf_addch(&env, ' ');
455 }
456 sq_quote_buf(&env, key);
457 strbuf_addch(&env, '=');
458 if (value)
459 sq_quote_buf(&env, value);
460 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
461 strbuf_release(&env);
462 }
463
464 void git_config_push_parameter(const char *text)
465 {
466 const char *value;
467
468 /*
469 * When we see:
470 *
471 * section.subsection=with=equals.key=value
472 *
473 * we cannot tell if it means:
474 *
475 * [section "subsection=with=equals"]
476 * key = value
477 *
478 * or:
479 *
480 * [section]
481 * subsection = with=equals.key=value
482 *
483 * We parse left-to-right for the first "=", meaning we'll prefer to
484 * keep the value intact over the subsection. This is historical, but
485 * also sensible since values are more likely to contain odd or
486 * untrusted input than a section name.
487 *
488 * A missing equals is explicitly allowed (as a bool-only entry).
489 */
490 value = strchr(text, '=');
491 if (value) {
492 char *key = xmemdupz(text, value - text);
493 git_config_push_split_parameter(key, value + 1);
494 free(key);
495 } else {
496 git_config_push_split_parameter(text, NULL);
497 }
498 }
499
500 void git_config_push_env(const char *spec)
501 {
502 char *key;
503 const char *env_name;
504 const char *env_value;
505
506 env_name = strrchr(spec, '=');
507 if (!env_name)
508 die(_("invalid config format: %s"), spec);
509 key = xmemdupz(spec, env_name - spec);
510 env_name++;
511 if (!*env_name)
512 die(_("missing environment variable name for configuration '%.*s'"),
513 (int)(env_name - spec - 1), spec);
514
515 env_value = getenv(env_name);
516 if (!env_value)
517 die(_("missing environment variable '%s' for configuration '%.*s'"),
518 env_name, (int)(env_name - spec - 1), spec);
519
520 git_config_push_split_parameter(key, env_value);
521 free(key);
522 }
523
524 static inline int iskeychar(int c)
525 {
526 return isalnum(c) || c == '-';
527 }
528
529 /*
530 * Auxiliary function to sanity-check and split the key into the section
531 * identifier and variable name.
532 *
533 * Returns 0 on success, -1 when there is an invalid character in the key and
534 * -2 if there is no section name in the key.
535 *
536 * store_key - pointer to char* which will hold a copy of the key with
537 * lowercase section and variable name
538 * baselen - pointer to size_t which will hold the length of the
539 * section + subsection part, can be NULL
540 */
541 int git_config_parse_key(const char *key, char **store_key, size_t *baselen_)
542 {
543 size_t i, baselen;
544 int dot;
545 const char *last_dot = strrchr(key, '.');
546
547 /*
548 * Since "key" actually contains the section name and the real
549 * key name separated by a dot, we have to know where the dot is.
550 */
551
552 if (last_dot == NULL || last_dot == key) {
553 error(_("key does not contain a section: %s"), key);
554 return -CONFIG_NO_SECTION_OR_NAME;
555 }
556
557 if (!last_dot[1]) {
558 error(_("key does not contain variable name: %s"), key);
559 return -CONFIG_NO_SECTION_OR_NAME;
560 }
561
562 baselen = last_dot - key;
563 if (baselen_)
564 *baselen_ = baselen;
565
566 /*
567 * Validate the key and while at it, lower case it for matching.
568 */
569 *store_key = xmallocz(strlen(key));
570
571 dot = 0;
572 for (i = 0; key[i]; i++) {
573 unsigned char c = key[i];
574 if (c == '.')
575 dot = 1;
576 /* Leave the extended basename untouched.. */
577 if (!dot || i > baselen) {
578 if (!iskeychar(c) ||
579 (i == baselen + 1 && !isalpha(c))) {
580 error(_("invalid key: %s"), key);
581 goto out_free_ret_1;
582 }
583 c = tolower(c);
584 } else if (c == '\n') {
585 error(_("invalid key (newline): %s"), key);
586 goto out_free_ret_1;
587 }
588 (*store_key)[i] = c;
589 }
590
591 return 0;
592
593 out_free_ret_1:
594 FREE_AND_NULL(*store_key);
595 return -CONFIG_INVALID_KEY;
596 }
597
598 static int config_parse_pair(const char *key, const char *value,
599 struct key_value_info *kvi,
600 config_fn_t fn, void *data)
601 {
602 char *canonical_name;
603 int ret;
604 struct config_context ctx = {
605 .kvi = kvi,
606 };
607
608 if (!strlen(key))
609 return error(_("empty config key"));
610 if (git_config_parse_key(key, &canonical_name, NULL))
611 return -1;
612
613 ret = (fn(canonical_name, value, &ctx, data) < 0) ? -1 : 0;
614 free(canonical_name);
615 return ret;
616 }
617
618
619 /* for values read from `git_config_from_parameters()` */
620 void kvi_from_param(struct key_value_info *out)
621 {
622 out->filename = NULL;
623 out->linenr = -1;
624 out->origin_type = CONFIG_ORIGIN_CMDLINE;
625 out->scope = CONFIG_SCOPE_COMMAND;
626 out->path = NULL;
627 }
628
629 int git_config_parse_parameter(const char *text,
630 config_fn_t fn, void *data)
631 {
632 const char *value;
633 struct strbuf **pair;
634 int ret;
635 struct key_value_info kvi = KVI_INIT;
636
637 kvi_from_param(&kvi);
638
639 pair = strbuf_split_str(text, '=', 2);
640 if (!pair[0])
641 return error(_("bogus config parameter: %s"), text);
642
643 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
644 strbuf_setlen(pair[0], pair[0]->len - 1);
645 value = pair[1] ? pair[1]->buf : "";
646 } else {
647 value = NULL;
648 }
649
650 strbuf_trim(pair[0]);
651 if (!pair[0]->len) {
652 strbuf_list_free(pair);
653 return error(_("bogus config parameter: %s"), text);
654 }
655
656 ret = config_parse_pair(pair[0]->buf, value, &kvi, fn, data);
657 strbuf_list_free(pair);
658 return ret;
659 }
660
661 static int parse_config_env_list(char *env, struct key_value_info *kvi,
662 config_fn_t fn, void *data)
663 {
664 char *cur = env;
665 while (cur && *cur) {
666 const char *key = sq_dequote_step(cur, &cur);
667 if (!key)
668 return error(_("bogus format in %s"),
669 CONFIG_DATA_ENVIRONMENT);
670
671 if (!cur || isspace(*cur)) {
672 /* old-style 'key=value' */
673 if (git_config_parse_parameter(key, fn, data) < 0)
674 return -1;
675 }
676 else if (*cur == '=') {
677 /* new-style 'key'='value' */
678 const char *value;
679
680 cur++;
681 if (*cur == '\'') {
682 /* quoted value */
683 value = sq_dequote_step(cur, &cur);
684 if (!value || (cur && !isspace(*cur))) {
685 return error(_("bogus format in %s"),
686 CONFIG_DATA_ENVIRONMENT);
687 }
688 } else if (!*cur || isspace(*cur)) {
689 /* implicit bool: 'key'= */
690 value = NULL;
691 } else {
692 return error(_("bogus format in %s"),
693 CONFIG_DATA_ENVIRONMENT);
694 }
695
696 if (config_parse_pair(key, value, kvi, fn, data) < 0)
697 return -1;
698 }
699 else {
700 /* unknown format */
701 return error(_("bogus format in %s"),
702 CONFIG_DATA_ENVIRONMENT);
703 }
704
705 if (cur) {
706 while (isspace(*cur))
707 cur++;
708 }
709 }
710 return 0;
711 }
712
713 int git_config_from_parameters(config_fn_t fn, void *data)
714 {
715 const char *env;
716 struct strbuf envvar = STRBUF_INIT;
717 struct strvec to_free = STRVEC_INIT;
718 int ret = 0;
719 char *envw = NULL;
720 struct key_value_info kvi = KVI_INIT;
721
722 kvi_from_param(&kvi);
723 env = getenv(CONFIG_COUNT_ENVIRONMENT);
724 if (env) {
725 unsigned long count;
726 char *endp;
727 int i;
728
729 count = strtoul(env, &endp, 10);
730 if (*endp) {
731 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
732 goto out;
733 }
734 if (count > INT_MAX) {
735 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
736 goto out;
737 }
738
739 for (i = 0; i < count; i++) {
740 const char *key, *value;
741
742 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
743 key = getenv_safe(&to_free, envvar.buf);
744 if (!key) {
745 ret = error(_("missing config key %s"), envvar.buf);
746 goto out;
747 }
748 strbuf_reset(&envvar);
749
750 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
751 value = getenv_safe(&to_free, envvar.buf);
752 if (!value) {
753 ret = error(_("missing config value %s"), envvar.buf);
754 goto out;
755 }
756 strbuf_reset(&envvar);
757
758 if (config_parse_pair(key, value, &kvi, fn, data) < 0) {
759 ret = -1;
760 goto out;
761 }
762 }
763 }
764
765 env = getenv(CONFIG_DATA_ENVIRONMENT);
766 if (env) {
767 /* sq_dequote will write over it */
768 envw = xstrdup(env);
769 if (parse_config_env_list(envw, &kvi, fn, data) < 0) {
770 ret = -1;
771 goto out;
772 }
773 }
774
775 out:
776 strbuf_release(&envvar);
777 strvec_clear(&to_free);
778 free(envw);
779 return ret;
780 }
781
782 static int get_next_char(struct config_source *cs)
783 {
784 int c = cs->do_fgetc(cs);
785
786 if (c == '\r') {
787 /* DOS like systems */
788 c = cs->do_fgetc(cs);
789 if (c != '\n') {
790 if (c != EOF)
791 cs->do_ungetc(c, cs);
792 c = '\r';
793 }
794 }
795
796 if (c != EOF && ++cs->total_len > INT_MAX) {
797 /*
798 * This is an absurdly long config file; refuse to parse
799 * further in order to protect downstream code from integer
800 * overflows. Note that we can't return an error specifically,
801 * but we can mark EOF and put trash in the return value,
802 * which will trigger a parse error.
803 */
804 cs->eof = 1;
805 return 0;
806 }
807
808 if (c == '\n')
809 cs->linenr++;
810 if (c == EOF) {
811 cs->eof = 1;
812 cs->linenr++;
813 c = '\n';
814 }
815 return c;
816 }
817
818 static char *parse_value(struct config_source *cs)
819 {
820 int quote = 0, comment = 0, space = 0;
821
822 strbuf_reset(&cs->value);
823 for (;;) {
824 int c = get_next_char(cs);
825 if (c == '\n') {
826 if (quote) {
827 cs->linenr--;
828 return NULL;
829 }
830 return cs->value.buf;
831 }
832 if (comment)
833 continue;
834 if (isspace(c) && !quote) {
835 if (cs->value.len)
836 space++;
837 continue;
838 }
839 if (!quote) {
840 if (c == ';' || c == '#') {
841 comment = 1;
842 continue;
843 }
844 }
845 for (; space; space--)
846 strbuf_addch(&cs->value, ' ');
847 if (c == '\\') {
848 c = get_next_char(cs);
849 switch (c) {
850 case '\n':
851 continue;
852 case 't':
853 c = '\t';
854 break;
855 case 'b':
856 c = '\b';
857 break;
858 case 'n':
859 c = '\n';
860 break;
861 /* Some characters escape as themselves */
862 case '\\': case '"':
863 break;
864 /* Reject unknown escape sequences */
865 default:
866 return NULL;
867 }
868 strbuf_addch(&cs->value, c);
869 continue;
870 }
871 if (c == '"') {
872 quote = 1-quote;
873 continue;
874 }
875 strbuf_addch(&cs->value, c);
876 }
877 }
878
879 static int get_value(struct config_source *cs, struct key_value_info *kvi,
880 config_fn_t fn, void *data, struct strbuf *name)
881 {
882 int c;
883 char *value;
884 int ret;
885 struct config_context ctx = {
886 .kvi = kvi,
887 };
888
889 /* Get the full name */
890 for (;;) {
891 c = get_next_char(cs);
892 if (cs->eof)
893 break;
894 if (!iskeychar(c))
895 break;
896 strbuf_addch(name, tolower(c));
897 }
898
899 while (c == ' ' || c == '\t')
900 c = get_next_char(cs);
901
902 value = NULL;
903 if (c != '\n') {
904 if (c != '=')
905 return -1;
906 value = parse_value(cs);
907 if (!value)
908 return -1;
909 }
910 /*
911 * We already consumed the \n, but we need linenr to point to
912 * the line we just parsed during the call to fn to get
913 * accurate line number in error messages.
914 */
915 cs->linenr--;
916 kvi->linenr = cs->linenr;
917 ret = fn(name->buf, value, &ctx, data);
918 if (ret >= 0)
919 cs->linenr++;
920 return ret;
921 }
922
923 static int get_extended_base_var(struct config_source *cs, struct strbuf *name,
924 int c)
925 {
926 cs->subsection_case_sensitive = 0;
927 do {
928 if (c == '\n')
929 goto error_incomplete_line;
930 c = get_next_char(cs);
931 } while (isspace(c));
932
933 /* We require the format to be '[base "extension"]' */
934 if (c != '"')
935 return -1;
936 strbuf_addch(name, '.');
937
938 for (;;) {
939 int c = get_next_char(cs);
940 if (c == '\n')
941 goto error_incomplete_line;
942 if (c == '"')
943 break;
944 if (c == '\\') {
945 c = get_next_char(cs);
946 if (c == '\n')
947 goto error_incomplete_line;
948 }
949 strbuf_addch(name, c);
950 }
951
952 /* Final ']' */
953 if (get_next_char(cs) != ']')
954 return -1;
955 return 0;
956 error_incomplete_line:
957 cs->linenr--;
958 return -1;
959 }
960
961 static int get_base_var(struct config_source *cs, struct strbuf *name)
962 {
963 cs->subsection_case_sensitive = 1;
964 for (;;) {
965 int c = get_next_char(cs);
966 if (cs->eof)
967 return -1;
968 if (c == ']')
969 return 0;
970 if (isspace(c))
971 return get_extended_base_var(cs, name, c);
972 if (!iskeychar(c) && c != '.')
973 return -1;
974 strbuf_addch(name, tolower(c));
975 }
976 }
977
978 struct parse_event_data {
979 enum config_event_t previous_type;
980 size_t previous_offset;
981 const struct config_options *opts;
982 };
983
984 static int do_event(struct config_source *cs, enum config_event_t type,
985 struct parse_event_data *data)
986 {
987 size_t offset;
988
989 if (!data->opts || !data->opts->event_fn)
990 return 0;
991
992 if (type == CONFIG_EVENT_WHITESPACE &&
993 data->previous_type == type)
994 return 0;
995
996 offset = cs->do_ftell(cs);
997 /*
998 * At EOF, the parser always "inserts" an extra '\n', therefore
999 * the end offset of the event is the current file position, otherwise
1000 * we will already have advanced to the next event.
1001 */
1002 if (type != CONFIG_EVENT_EOF)
1003 offset--;
1004
1005 if (data->previous_type != CONFIG_EVENT_EOF &&
1006 data->opts->event_fn(data->previous_type, data->previous_offset,
1007 offset, cs, data->opts->event_fn_data) < 0)
1008 return -1;
1009
1010 data->previous_type = type;
1011 data->previous_offset = offset;
1012
1013 return 0;
1014 }
1015
1016 static void kvi_from_source(struct config_source *cs,
1017 enum config_scope scope,
1018 struct key_value_info *out)
1019 {
1020 out->filename = strintern(cs->name);
1021 out->origin_type = cs->origin_type;
1022 out->linenr = cs->linenr;
1023 out->scope = scope;
1024 out->path = cs->path;
1025 }
1026
1027 static int git_parse_source(struct config_source *cs, config_fn_t fn,
1028 struct key_value_info *kvi, void *data,
1029 const struct config_options *opts)
1030 {
1031 int comment = 0;
1032 size_t baselen = 0;
1033 struct strbuf *var = &cs->var;
1034 int error_return = 0;
1035 char *error_msg = NULL;
1036
1037 /* U+FEFF Byte Order Mark in UTF8 */
1038 const char *bomptr = utf8_bom;
1039
1040 /* For the parser event callback */
1041 struct parse_event_data event_data = {
1042 CONFIG_EVENT_EOF, 0, opts
1043 };
1044
1045 for (;;) {
1046 int c;
1047
1048 c = get_next_char(cs);
1049 if (bomptr && *bomptr) {
1050 /* We are at the file beginning; skip UTF8-encoded BOM
1051 * if present. Sane editors won't put this in on their
1052 * own, but e.g. Windows Notepad will do it happily. */
1053 if (c == (*bomptr & 0377)) {
1054 bomptr++;
1055 continue;
1056 } else {
1057 /* Do not tolerate partial BOM. */
1058 if (bomptr != utf8_bom)
1059 break;
1060 /* No BOM at file beginning. Cool. */
1061 bomptr = NULL;
1062 }
1063 }
1064 if (c == '\n') {
1065 if (cs->eof) {
1066 if (do_event(cs, CONFIG_EVENT_EOF, &event_data) < 0)
1067 return -1;
1068 return 0;
1069 }
1070 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1071 return -1;
1072 comment = 0;
1073 continue;
1074 }
1075 if (comment)
1076 continue;
1077 if (isspace(c)) {
1078 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1079 return -1;
1080 continue;
1081 }
1082 if (c == '#' || c == ';') {
1083 if (do_event(cs, CONFIG_EVENT_COMMENT, &event_data) < 0)
1084 return -1;
1085 comment = 1;
1086 continue;
1087 }
1088 if (c == '[') {
1089 if (do_event(cs, CONFIG_EVENT_SECTION, &event_data) < 0)
1090 return -1;
1091
1092 /* Reset prior to determining a new stem */
1093 strbuf_reset(var);
1094 if (get_base_var(cs, var) < 0 || var->len < 1)
1095 break;
1096 strbuf_addch(var, '.');
1097 baselen = var->len;
1098 continue;
1099 }
1100 if (!isalpha(c))
1101 break;
1102
1103 if (do_event(cs, CONFIG_EVENT_ENTRY, &event_data) < 0)
1104 return -1;
1105
1106 /*
1107 * Truncate the var name back to the section header
1108 * stem prior to grabbing the suffix part of the name
1109 * and the value.
1110 */
1111 strbuf_setlen(var, baselen);
1112 strbuf_addch(var, tolower(c));
1113 if (get_value(cs, kvi, fn, data, var) < 0)
1114 break;
1115 }
1116
1117 if (do_event(cs, CONFIG_EVENT_ERROR, &event_data) < 0)
1118 return -1;
1119
1120 switch (cs->origin_type) {
1121 case CONFIG_ORIGIN_BLOB:
1122 error_msg = xstrfmt(_("bad config line %d in blob %s"),
1123 cs->linenr, cs->name);
1124 break;
1125 case CONFIG_ORIGIN_FILE:
1126 error_msg = xstrfmt(_("bad config line %d in file %s"),
1127 cs->linenr, cs->name);
1128 break;
1129 case CONFIG_ORIGIN_STDIN:
1130 error_msg = xstrfmt(_("bad config line %d in standard input"),
1131 cs->linenr);
1132 break;
1133 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1134 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1135 cs->linenr, cs->name);
1136 break;
1137 case CONFIG_ORIGIN_CMDLINE:
1138 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1139 cs->linenr, cs->name);
1140 break;
1141 default:
1142 error_msg = xstrfmt(_("bad config line %d in %s"),
1143 cs->linenr, cs->name);
1144 }
1145
1146 switch (opts && opts->error_action ?
1147 opts->error_action :
1148 cs->default_error_action) {
1149 case CONFIG_ERROR_DIE:
1150 die("%s", error_msg);
1151 break;
1152 case CONFIG_ERROR_ERROR:
1153 error_return = error("%s", error_msg);
1154 break;
1155 case CONFIG_ERROR_SILENT:
1156 error_return = -1;
1157 break;
1158 case CONFIG_ERROR_UNSET:
1159 BUG("config error action unset");
1160 }
1161
1162 free(error_msg);
1163 return error_return;
1164 }
1165
1166 NORETURN
1167 static void die_bad_number(const char *name, const char *value,
1168 const struct key_value_info *kvi)
1169 {
1170 const char *error_type = (errno == ERANGE) ?
1171 N_("out of range") : N_("invalid unit");
1172 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1173
1174 if (!kvi)
1175 BUG("kvi should not be NULL");
1176
1177 if (!value)
1178 value = "";
1179
1180 if (!kvi->filename)
1181 die(_(bad_numeric), value, name, _(error_type));
1182
1183 switch (kvi->origin_type) {
1184 case CONFIG_ORIGIN_BLOB:
1185 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1186 value, name, kvi->filename, _(error_type));
1187 case CONFIG_ORIGIN_FILE:
1188 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1189 value, name, kvi->filename, _(error_type));
1190 case CONFIG_ORIGIN_STDIN:
1191 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1192 value, name, _(error_type));
1193 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1194 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1195 value, name, kvi->filename, _(error_type));
1196 case CONFIG_ORIGIN_CMDLINE:
1197 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1198 value, name, kvi->filename, _(error_type));
1199 default:
1200 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1201 value, name, kvi->filename, _(error_type));
1202 }
1203 }
1204
1205 int git_config_int(const char *name, const char *value,
1206 const struct key_value_info *kvi)
1207 {
1208 int ret;
1209 if (!git_parse_int(value, &ret))
1210 die_bad_number(name, value, kvi);
1211 return ret;
1212 }
1213
1214 int64_t git_config_int64(const char *name, const char *value,
1215 const struct key_value_info *kvi)
1216 {
1217 int64_t ret;
1218 if (!git_parse_int64(value, &ret))
1219 die_bad_number(name, value, kvi);
1220 return ret;
1221 }
1222
1223 unsigned long git_config_ulong(const char *name, const char *value,
1224 const struct key_value_info *kvi)
1225 {
1226 unsigned long ret;
1227 if (!git_parse_ulong(value, &ret))
1228 die_bad_number(name, value, kvi);
1229 return ret;
1230 }
1231
1232 ssize_t git_config_ssize_t(const char *name, const char *value,
1233 const struct key_value_info *kvi)
1234 {
1235 ssize_t ret;
1236 if (!git_parse_ssize_t(value, &ret))
1237 die_bad_number(name, value, kvi);
1238 return ret;
1239 }
1240
1241 static const struct fsync_component_name {
1242 const char *name;
1243 enum fsync_component component_bits;
1244 } fsync_component_names[] = {
1245 { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT },
1246 { "pack", FSYNC_COMPONENT_PACK },
1247 { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
1248 { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
1249 { "index", FSYNC_COMPONENT_INDEX },
1250 { "objects", FSYNC_COMPONENTS_OBJECTS },
1251 { "reference", FSYNC_COMPONENT_REFERENCE },
1252 { "derived-metadata", FSYNC_COMPONENTS_DERIVED_METADATA },
1253 { "committed", FSYNC_COMPONENTS_COMMITTED },
1254 { "added", FSYNC_COMPONENTS_ADDED },
1255 { "all", FSYNC_COMPONENTS_ALL },
1256 };
1257
1258 static enum fsync_component parse_fsync_components(const char *var, const char *string)
1259 {
1260 enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
1261 enum fsync_component positive = 0, negative = 0;
1262
1263 while (string) {
1264 int i;
1265 size_t len;
1266 const char *ep;
1267 int negated = 0;
1268 int found = 0;
1269
1270 string = string + strspn(string, ", \t\n\r");
1271 ep = strchrnul(string, ',');
1272 len = ep - string;
1273 if (!strcmp(string, "none")) {
1274 current = FSYNC_COMPONENT_NONE;
1275 goto next_name;
1276 }
1277
1278 if (*string == '-') {
1279 negated = 1;
1280 string++;
1281 len--;
1282 if (!len)
1283 warning(_("invalid value for variable %s"), var);
1284 }
1285
1286 if (!len)
1287 break;
1288
1289 for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) {
1290 const struct fsync_component_name *n = &fsync_component_names[i];
1291
1292 if (strncmp(n->name, string, len))
1293 continue;
1294
1295 found = 1;
1296 if (negated)
1297 negative |= n->component_bits;
1298 else
1299 positive |= n->component_bits;
1300 }
1301
1302 if (!found) {
1303 char *component = xstrndup(string, len);
1304 warning(_("ignoring unknown core.fsync component '%s'"), component);
1305 free(component);
1306 }
1307
1308 next_name:
1309 string = ep;
1310 }
1311
1312 return (current & ~negative) | positive;
1313 }
1314
1315 int git_config_bool_or_int(const char *name, const char *value,
1316 const struct key_value_info *kvi, int *is_bool)
1317 {
1318 int v = git_parse_maybe_bool_text(value);
1319 if (0 <= v) {
1320 *is_bool = 1;
1321 return v;
1322 }
1323 *is_bool = 0;
1324 return git_config_int(name, value, kvi);
1325 }
1326
1327 int git_config_bool(const char *name, const char *value)
1328 {
1329 int v = git_parse_maybe_bool(value);
1330 if (v < 0)
1331 die(_("bad boolean config value '%s' for '%s'"), value, name);
1332 return v;
1333 }
1334
1335 int git_config_string(const char **dest, const char *var, const char *value)
1336 {
1337 if (!value)
1338 return config_error_nonbool(var);
1339 *dest = xstrdup(value);
1340 return 0;
1341 }
1342
1343 int git_config_pathname(const char **dest, const char *var, const char *value)
1344 {
1345 if (!value)
1346 return config_error_nonbool(var);
1347 *dest = interpolate_path(value, 0);
1348 if (!*dest)
1349 die(_("failed to expand user dir in: '%s'"), value);
1350 return 0;
1351 }
1352
1353 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1354 {
1355 if (!value)
1356 return config_error_nonbool(var);
1357 if (parse_expiry_date(value, timestamp))
1358 return error(_("'%s' for '%s' is not a valid timestamp"),
1359 value, var);
1360 return 0;
1361 }
1362
1363 int git_config_color(char *dest, const char *var, const char *value)
1364 {
1365 if (!value)
1366 return config_error_nonbool(var);
1367 if (color_parse(value, dest) < 0)
1368 return -1;
1369 return 0;
1370 }
1371
1372 static int git_default_core_config(const char *var, const char *value,
1373 const struct config_context *ctx, void *cb)
1374 {
1375 /* This needs a better name */
1376 if (!strcmp(var, "core.filemode")) {
1377 trust_executable_bit = git_config_bool(var, value);
1378 return 0;
1379 }
1380 if (!strcmp(var, "core.trustctime")) {
1381 trust_ctime = git_config_bool(var, value);
1382 return 0;
1383 }
1384 if (!strcmp(var, "core.checkstat")) {
1385 if (!value)
1386 return config_error_nonbool(var);
1387 if (!strcasecmp(value, "default"))
1388 check_stat = 1;
1389 else if (!strcasecmp(value, "minimal"))
1390 check_stat = 0;
1391 else
1392 return error(_("invalid value for '%s': '%s'"),
1393 var, value);
1394 }
1395
1396 if (!strcmp(var, "core.quotepath")) {
1397 quote_path_fully = git_config_bool(var, value);
1398 return 0;
1399 }
1400
1401 if (!strcmp(var, "core.symlinks")) {
1402 has_symlinks = git_config_bool(var, value);
1403 return 0;
1404 }
1405
1406 if (!strcmp(var, "core.ignorecase")) {
1407 ignore_case = git_config_bool(var, value);
1408 return 0;
1409 }
1410
1411 if (!strcmp(var, "core.attributesfile"))
1412 return git_config_pathname(&git_attributes_file, var, value);
1413
1414 if (!strcmp(var, "core.hookspath"))
1415 return git_config_pathname(&git_hooks_path, var, value);
1416
1417 if (!strcmp(var, "core.bare")) {
1418 is_bare_repository_cfg = git_config_bool(var, value);
1419 return 0;
1420 }
1421
1422 if (!strcmp(var, "core.ignorestat")) {
1423 assume_unchanged = git_config_bool(var, value);
1424 return 0;
1425 }
1426
1427 if (!strcmp(var, "core.prefersymlinkrefs")) {
1428 prefer_symlink_refs = git_config_bool(var, value);
1429 return 0;
1430 }
1431
1432 if (!strcmp(var, "core.logallrefupdates")) {
1433 if (value && !strcasecmp(value, "always"))
1434 log_all_ref_updates = LOG_REFS_ALWAYS;
1435 else if (git_config_bool(var, value))
1436 log_all_ref_updates = LOG_REFS_NORMAL;
1437 else
1438 log_all_ref_updates = LOG_REFS_NONE;
1439 return 0;
1440 }
1441
1442 if (!strcmp(var, "core.warnambiguousrefs")) {
1443 warn_ambiguous_refs = git_config_bool(var, value);
1444 return 0;
1445 }
1446
1447 if (!strcmp(var, "core.abbrev")) {
1448 if (!value)
1449 return config_error_nonbool(var);
1450 if (!strcasecmp(value, "auto"))
1451 default_abbrev = -1;
1452 else if (!git_parse_maybe_bool_text(value))
1453 default_abbrev = the_hash_algo->hexsz;
1454 else {
1455 int abbrev = git_config_int(var, value, ctx->kvi);
1456 if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
1457 return error(_("abbrev length out of range: %d"), abbrev);
1458 default_abbrev = abbrev;
1459 }
1460 return 0;
1461 }
1462
1463 if (!strcmp(var, "core.disambiguate"))
1464 return set_disambiguate_hint_config(var, value);
1465
1466 if (!strcmp(var, "core.loosecompression")) {
1467 int level = git_config_int(var, value, ctx->kvi);
1468 if (level == -1)
1469 level = Z_DEFAULT_COMPRESSION;
1470 else if (level < 0 || level > Z_BEST_COMPRESSION)
1471 die(_("bad zlib compression level %d"), level);
1472 zlib_compression_level = level;
1473 zlib_compression_seen = 1;
1474 return 0;
1475 }
1476
1477 if (!strcmp(var, "core.compression")) {
1478 int level = git_config_int(var, value, ctx->kvi);
1479 if (level == -1)
1480 level = Z_DEFAULT_COMPRESSION;
1481 else if (level < 0 || level > Z_BEST_COMPRESSION)
1482 die(_("bad zlib compression level %d"), level);
1483 if (!zlib_compression_seen)
1484 zlib_compression_level = level;
1485 if (!pack_compression_seen)
1486 pack_compression_level = level;
1487 return 0;
1488 }
1489
1490 if (!strcmp(var, "core.packedgitwindowsize")) {
1491 int pgsz_x2 = getpagesize() * 2;
1492 packed_git_window_size = git_config_ulong(var, value, ctx->kvi);
1493
1494 /* This value must be multiple of (pagesize * 2) */
1495 packed_git_window_size /= pgsz_x2;
1496 if (packed_git_window_size < 1)
1497 packed_git_window_size = 1;
1498 packed_git_window_size *= pgsz_x2;
1499 return 0;
1500 }
1501
1502 if (!strcmp(var, "core.bigfilethreshold")) {
1503 big_file_threshold = git_config_ulong(var, value, ctx->kvi);
1504 return 0;
1505 }
1506
1507 if (!strcmp(var, "core.packedgitlimit")) {
1508 packed_git_limit = git_config_ulong(var, value, ctx->kvi);
1509 return 0;
1510 }
1511
1512 if (!strcmp(var, "core.deltabasecachelimit")) {
1513 delta_base_cache_limit = git_config_ulong(var, value, ctx->kvi);
1514 return 0;
1515 }
1516
1517 if (!strcmp(var, "core.autocrlf")) {
1518 if (value && !strcasecmp(value, "input")) {
1519 auto_crlf = AUTO_CRLF_INPUT;
1520 return 0;
1521 }
1522 auto_crlf = git_config_bool(var, value);
1523 return 0;
1524 }
1525
1526 if (!strcmp(var, "core.safecrlf")) {
1527 int eol_rndtrp_die;
1528 if (value && !strcasecmp(value, "warn")) {
1529 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1530 return 0;
1531 }
1532 eol_rndtrp_die = git_config_bool(var, value);
1533 global_conv_flags_eol = eol_rndtrp_die ?
1534 CONV_EOL_RNDTRP_DIE : 0;
1535 return 0;
1536 }
1537
1538 if (!strcmp(var, "core.eol")) {
1539 if (value && !strcasecmp(value, "lf"))
1540 core_eol = EOL_LF;
1541 else if (value && !strcasecmp(value, "crlf"))
1542 core_eol = EOL_CRLF;
1543 else if (value && !strcasecmp(value, "native"))
1544 core_eol = EOL_NATIVE;
1545 else
1546 core_eol = EOL_UNSET;
1547 return 0;
1548 }
1549
1550 if (!strcmp(var, "core.checkroundtripencoding"))
1551 return git_config_string(&check_roundtrip_encoding, var, value);
1552
1553 if (!strcmp(var, "core.notesref")) {
1554 if (!value)
1555 return config_error_nonbool(var);
1556 notes_ref_name = xstrdup(value);
1557 return 0;
1558 }
1559
1560 if (!strcmp(var, "core.editor"))
1561 return git_config_string(&editor_program, var, value);
1562
1563 if (!strcmp(var, "core.commentchar")) {
1564 if (!value)
1565 return config_error_nonbool(var);
1566 else if (!strcasecmp(value, "auto"))
1567 auto_comment_line_char = 1;
1568 else if (value[0] && !value[1]) {
1569 if (value[0] == '\n')
1570 return error(_("core.commentChar cannot be newline"));
1571 comment_line_str = xstrfmt("%c", value[0]);
1572 auto_comment_line_char = 0;
1573 } else
1574 return error(_("core.commentChar should only be one ASCII character"));
1575 return 0;
1576 }
1577
1578 if (!strcmp(var, "core.askpass"))
1579 return git_config_string(&askpass_program, var, value);
1580
1581 if (!strcmp(var, "core.excludesfile"))
1582 return git_config_pathname(&excludes_file, var, value);
1583
1584 if (!strcmp(var, "core.whitespace")) {
1585 if (!value)
1586 return config_error_nonbool(var);
1587 whitespace_rule_cfg = parse_whitespace_rule(value);
1588 return 0;
1589 }
1590
1591 if (!strcmp(var, "core.fsync")) {
1592 if (!value)
1593 return config_error_nonbool(var);
1594 fsync_components = parse_fsync_components(var, value);
1595 return 0;
1596 }
1597
1598 if (!strcmp(var, "core.fsyncmethod")) {
1599 if (!value)
1600 return config_error_nonbool(var);
1601 if (!strcmp(value, "fsync"))
1602 fsync_method = FSYNC_METHOD_FSYNC;
1603 else if (!strcmp(value, "writeout-only"))
1604 fsync_method = FSYNC_METHOD_WRITEOUT_ONLY;
1605 else if (!strcmp(value, "batch"))
1606 fsync_method = FSYNC_METHOD_BATCH;
1607 else
1608 warning(_("ignoring unknown core.fsyncMethod value '%s'"), value);
1609
1610 }
1611
1612 if (!strcmp(var, "core.fsyncobjectfiles")) {
1613 if (fsync_object_files < 0)
1614 warning(_("core.fsyncObjectFiles is deprecated; use core.fsync instead"));
1615 fsync_object_files = git_config_bool(var, value);
1616 return 0;
1617 }
1618
1619 if (!strcmp(var, "core.preloadindex")) {
1620 core_preload_index = git_config_bool(var, value);
1621 return 0;
1622 }
1623
1624 if (!strcmp(var, "core.createobject")) {
1625 if (!value)
1626 return config_error_nonbool(var);
1627 if (!strcmp(value, "rename"))
1628 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1629 else if (!strcmp(value, "link"))
1630 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1631 else
1632 die(_("invalid mode for object creation: %s"), value);
1633 return 0;
1634 }
1635
1636 if (!strcmp(var, "core.sparsecheckout")) {
1637 core_apply_sparse_checkout = git_config_bool(var, value);
1638 return 0;
1639 }
1640
1641 if (!strcmp(var, "core.sparsecheckoutcone")) {
1642 core_sparse_checkout_cone = git_config_bool(var, value);
1643 return 0;
1644 }
1645
1646 if (!strcmp(var, "core.precomposeunicode")) {
1647 precomposed_unicode = git_config_bool(var, value);
1648 return 0;
1649 }
1650
1651 if (!strcmp(var, "core.protecthfs")) {
1652 protect_hfs = git_config_bool(var, value);
1653 return 0;
1654 }
1655
1656 if (!strcmp(var, "core.protectntfs")) {
1657 protect_ntfs = git_config_bool(var, value);
1658 return 0;
1659 }
1660
1661 if (!strcmp(var, "core.maxtreedepth")) {
1662 max_allowed_tree_depth = git_config_int(var, value, ctx->kvi);
1663 return 0;
1664 }
1665
1666 /* Add other config variables here and to Documentation/config.txt. */
1667 return platform_core_config(var, value, ctx, cb);
1668 }
1669
1670 static int git_default_sparse_config(const char *var, const char *value)
1671 {
1672 if (!strcmp(var, "sparse.expectfilesoutsideofpatterns")) {
1673 sparse_expect_files_outside_of_patterns = git_config_bool(var, value);
1674 return 0;
1675 }
1676
1677 /* Add other config variables here and to Documentation/config/sparse.txt. */
1678 return 0;
1679 }
1680
1681 static int git_default_i18n_config(const char *var, const char *value)
1682 {
1683 if (!strcmp(var, "i18n.commitencoding"))
1684 return git_config_string(&git_commit_encoding, var, value);
1685
1686 if (!strcmp(var, "i18n.logoutputencoding"))
1687 return git_config_string(&git_log_output_encoding, var, value);
1688
1689 /* Add other config variables here and to Documentation/config.txt. */
1690 return 0;
1691 }
1692
1693 static int git_default_branch_config(const char *var, const char *value)
1694 {
1695 if (!strcmp(var, "branch.autosetupmerge")) {
1696 if (value && !strcmp(value, "always")) {
1697 git_branch_track = BRANCH_TRACK_ALWAYS;
1698 return 0;
1699 } else if (value && !strcmp(value, "inherit")) {
1700 git_branch_track = BRANCH_TRACK_INHERIT;
1701 return 0;
1702 } else if (value && !strcmp(value, "simple")) {
1703 git_branch_track = BRANCH_TRACK_SIMPLE;
1704 return 0;
1705 }
1706 git_branch_track = git_config_bool(var, value);
1707 return 0;
1708 }
1709 if (!strcmp(var, "branch.autosetuprebase")) {
1710 if (!value)
1711 return config_error_nonbool(var);
1712 else if (!strcmp(value, "never"))
1713 autorebase = AUTOREBASE_NEVER;
1714 else if (!strcmp(value, "local"))
1715 autorebase = AUTOREBASE_LOCAL;
1716 else if (!strcmp(value, "remote"))
1717 autorebase = AUTOREBASE_REMOTE;
1718 else if (!strcmp(value, "always"))
1719 autorebase = AUTOREBASE_ALWAYS;
1720 else
1721 return error(_("malformed value for %s"), var);
1722 return 0;
1723 }
1724
1725 /* Add other config variables here and to Documentation/config.txt. */
1726 return 0;
1727 }
1728
1729 static int git_default_push_config(const char *var, const char *value)
1730 {
1731 if (!strcmp(var, "push.default")) {
1732 if (!value)
1733 return config_error_nonbool(var);
1734 else if (!strcmp(value, "nothing"))
1735 push_default = PUSH_DEFAULT_NOTHING;
1736 else if (!strcmp(value, "matching"))
1737 push_default = PUSH_DEFAULT_MATCHING;
1738 else if (!strcmp(value, "simple"))
1739 push_default = PUSH_DEFAULT_SIMPLE;
1740 else if (!strcmp(value, "upstream"))
1741 push_default = PUSH_DEFAULT_UPSTREAM;
1742 else if (!strcmp(value, "tracking")) /* deprecated */
1743 push_default = PUSH_DEFAULT_UPSTREAM;
1744 else if (!strcmp(value, "current"))
1745 push_default = PUSH_DEFAULT_CURRENT;
1746 else {
1747 error(_("malformed value for %s: %s"), var, value);
1748 return error(_("must be one of nothing, matching, simple, "
1749 "upstream or current"));
1750 }
1751 return 0;
1752 }
1753
1754 /* Add other config variables here and to Documentation/config.txt. */
1755 return 0;
1756 }
1757
1758 static int git_default_mailmap_config(const char *var, const char *value)
1759 {
1760 if (!strcmp(var, "mailmap.file"))
1761 return git_config_pathname(&git_mailmap_file, var, value);
1762 if (!strcmp(var, "mailmap.blob"))
1763 return git_config_string(&git_mailmap_blob, var, value);
1764
1765 /* Add other config variables here and to Documentation/config.txt. */
1766 return 0;
1767 }
1768
1769 static int git_default_attr_config(const char *var, const char *value)
1770 {
1771 if (!strcmp(var, "attr.tree"))
1772 return git_config_string(&git_attr_tree, var, value);
1773
1774 /*
1775 * Add other attribute related config variables here and to
1776 * Documentation/config/attr.txt.
1777 */
1778 return 0;
1779 }
1780
1781 int git_default_config(const char *var, const char *value,
1782 const struct config_context *ctx, void *cb)
1783 {
1784 if (starts_with(var, "core."))
1785 return git_default_core_config(var, value, ctx, cb);
1786
1787 if (starts_with(var, "user.") ||
1788 starts_with(var, "author.") ||
1789 starts_with(var, "committer."))
1790 return git_ident_config(var, value, ctx, cb);
1791
1792 if (starts_with(var, "i18n."))
1793 return git_default_i18n_config(var, value);
1794
1795 if (starts_with(var, "branch."))
1796 return git_default_branch_config(var, value);
1797
1798 if (starts_with(var, "push."))
1799 return git_default_push_config(var, value);
1800
1801 if (starts_with(var, "mailmap."))
1802 return git_default_mailmap_config(var, value);
1803
1804 if (starts_with(var, "attr."))
1805 return git_default_attr_config(var, value);
1806
1807 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1808 return git_default_advice_config(var, value);
1809
1810 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1811 pager_use_color = git_config_bool(var,value);
1812 return 0;
1813 }
1814
1815 if (!strcmp(var, "pack.packsizelimit")) {
1816 pack_size_limit_cfg = git_config_ulong(var, value, ctx->kvi);
1817 return 0;
1818 }
1819
1820 if (!strcmp(var, "pack.compression")) {
1821 int level = git_config_int(var, value, ctx->kvi);
1822 if (level == -1)
1823 level = Z_DEFAULT_COMPRESSION;
1824 else if (level < 0 || level > Z_BEST_COMPRESSION)
1825 die(_("bad pack compression level %d"), level);
1826 pack_compression_level = level;
1827 pack_compression_seen = 1;
1828 return 0;
1829 }
1830
1831 if (starts_with(var, "sparse."))
1832 return git_default_sparse_config(var, value);
1833
1834 /* Add other config variables here and to Documentation/config.txt. */
1835 return 0;
1836 }
1837
1838 /*
1839 * All source specific fields in the union, die_on_error, name and the callbacks
1840 * fgetc, ungetc, ftell of top need to be initialized before calling
1841 * this function.
1842 */
1843 static int do_config_from(struct config_source *top, config_fn_t fn,
1844 void *data, enum config_scope scope,
1845 const struct config_options *opts)
1846 {
1847 struct key_value_info kvi = KVI_INIT;
1848 int ret;
1849
1850 /* push config-file parsing state stack */
1851 top->linenr = 1;
1852 top->eof = 0;
1853 top->total_len = 0;
1854 strbuf_init(&top->value, 1024);
1855 strbuf_init(&top->var, 1024);
1856 kvi_from_source(top, scope, &kvi);
1857
1858 ret = git_parse_source(top, fn, &kvi, data, opts);
1859
1860 strbuf_release(&top->value);
1861 strbuf_release(&top->var);
1862
1863 return ret;
1864 }
1865
1866 static int do_config_from_file(config_fn_t fn,
1867 const enum config_origin_type origin_type,
1868 const char *name, const char *path, FILE *f,
1869 void *data, enum config_scope scope,
1870 const struct config_options *opts)
1871 {
1872 struct config_source top = CONFIG_SOURCE_INIT;
1873 int ret;
1874
1875 top.u.file = f;
1876 top.origin_type = origin_type;
1877 top.name = name;
1878 top.path = path;
1879 top.default_error_action = CONFIG_ERROR_DIE;
1880 top.do_fgetc = config_file_fgetc;
1881 top.do_ungetc = config_file_ungetc;
1882 top.do_ftell = config_file_ftell;
1883
1884 flockfile(f);
1885 ret = do_config_from(&top, fn, data, scope, opts);
1886 funlockfile(f);
1887 return ret;
1888 }
1889
1890 static int git_config_from_stdin(config_fn_t fn, void *data,
1891 enum config_scope scope)
1892 {
1893 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1894 data, scope, NULL);
1895 }
1896
1897 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1898 void *data, enum config_scope scope,
1899 const struct config_options *opts)
1900 {
1901 int ret = -1;
1902 FILE *f;
1903
1904 if (!filename)
1905 BUG("filename cannot be NULL");
1906 f = fopen_or_warn(filename, "r");
1907 if (f) {
1908 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1909 filename, f, data, scope, opts);
1910 fclose(f);
1911 }
1912 return ret;
1913 }
1914
1915 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1916 {
1917 return git_config_from_file_with_options(fn, filename, data,
1918 CONFIG_SCOPE_UNKNOWN, NULL);
1919 }
1920
1921 int git_config_from_mem(config_fn_t fn,
1922 const enum config_origin_type origin_type,
1923 const char *name, const char *buf, size_t len,
1924 void *data, enum config_scope scope,
1925 const struct config_options *opts)
1926 {
1927 struct config_source top = CONFIG_SOURCE_INIT;
1928
1929 top.u.buf.buf = buf;
1930 top.u.buf.len = len;
1931 top.u.buf.pos = 0;
1932 top.origin_type = origin_type;
1933 top.name = name;
1934 top.path = NULL;
1935 top.default_error_action = CONFIG_ERROR_ERROR;
1936 top.do_fgetc = config_buf_fgetc;
1937 top.do_ungetc = config_buf_ungetc;
1938 top.do_ftell = config_buf_ftell;
1939
1940 return do_config_from(&top, fn, data, scope, opts);
1941 }
1942
1943 int git_config_from_blob_oid(config_fn_t fn,
1944 const char *name,
1945 struct repository *repo,
1946 const struct object_id *oid,
1947 void *data,
1948 enum config_scope scope)
1949 {
1950 enum object_type type;
1951 char *buf;
1952 unsigned long size;
1953 int ret;
1954
1955 buf = repo_read_object_file(repo, oid, &type, &size);
1956 if (!buf)
1957 return error(_("unable to load config blob object '%s'"), name);
1958 if (type != OBJ_BLOB) {
1959 free(buf);
1960 return error(_("reference '%s' does not point to a blob"), name);
1961 }
1962
1963 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1964 data, scope, NULL);
1965 free(buf);
1966
1967 return ret;
1968 }
1969
1970 static int git_config_from_blob_ref(config_fn_t fn,
1971 struct repository *repo,
1972 const char *name,
1973 void *data,
1974 enum config_scope scope)
1975 {
1976 struct object_id oid;
1977
1978 if (repo_get_oid(repo, name, &oid) < 0)
1979 return error(_("unable to resolve config blob '%s'"), name);
1980 return git_config_from_blob_oid(fn, name, repo, &oid, data, scope);
1981 }
1982
1983 char *git_system_config(void)
1984 {
1985 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
1986 if (!system_config)
1987 system_config = system_path(ETC_GITCONFIG);
1988 normalize_path_copy(system_config, system_config);
1989 return system_config;
1990 }
1991
1992 char *git_global_config(void)
1993 {
1994 char *user_config, *xdg_config;
1995
1996 git_global_config_paths(&user_config, &xdg_config);
1997 if (!user_config) {
1998 free(xdg_config);
1999 return NULL;
2000 }
2001
2002 if (access_or_warn(user_config, R_OK, 0) && xdg_config &&
2003 !access_or_warn(xdg_config, R_OK, 0)) {
2004 free(user_config);
2005 return xdg_config;
2006 } else {
2007 free(xdg_config);
2008 return user_config;
2009 }
2010 }
2011
2012 void git_global_config_paths(char **user_out, char **xdg_out)
2013 {
2014 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
2015 char *xdg_config = NULL;
2016
2017 if (!user_config) {
2018 user_config = interpolate_path("~/.gitconfig", 0);
2019 xdg_config = xdg_config_home("config");
2020 }
2021
2022 *user_out = user_config;
2023 *xdg_out = xdg_config;
2024 }
2025
2026 int git_config_system(void)
2027 {
2028 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
2029 }
2030
2031 static int do_git_config_sequence(const struct config_options *opts,
2032 const struct repository *repo,
2033 config_fn_t fn, void *data)
2034 {
2035 int ret = 0;
2036 char *system_config = git_system_config();
2037 char *xdg_config = NULL;
2038 char *user_config = NULL;
2039 char *repo_config;
2040 char *worktree_config;
2041
2042 /*
2043 * Ensure that either:
2044 * - the git_dir and commondir are both set, or
2045 * - the git_dir and commondir are both NULL
2046 */
2047 if (!opts->git_dir != !opts->commondir)
2048 BUG("only one of commondir and git_dir is non-NULL");
2049
2050 if (opts->commondir) {
2051 repo_config = mkpathdup("%s/config", opts->commondir);
2052 worktree_config = mkpathdup("%s/config.worktree", opts->git_dir);
2053 } else {
2054 repo_config = NULL;
2055 worktree_config = NULL;
2056 }
2057
2058 if (git_config_system() && system_config &&
2059 !access_or_die(system_config, R_OK,
2060 opts->system_gently ? ACCESS_EACCES_OK : 0))
2061 ret += git_config_from_file_with_options(fn, system_config,
2062 data, CONFIG_SCOPE_SYSTEM,
2063 NULL);
2064
2065 git_global_config_paths(&user_config, &xdg_config);
2066
2067 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
2068 ret += git_config_from_file_with_options(fn, xdg_config, data,
2069 CONFIG_SCOPE_GLOBAL, NULL);
2070
2071 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
2072 ret += git_config_from_file_with_options(fn, user_config, data,
2073 CONFIG_SCOPE_GLOBAL, NULL);
2074
2075 if (!opts->ignore_repo && repo_config &&
2076 !access_or_die(repo_config, R_OK, 0))
2077 ret += git_config_from_file_with_options(fn, repo_config, data,
2078 CONFIG_SCOPE_LOCAL, NULL);
2079
2080 if (!opts->ignore_worktree && worktree_config &&
2081 repo && repo->repository_format_worktree_config &&
2082 !access_or_die(worktree_config, R_OK, 0)) {
2083 ret += git_config_from_file_with_options(fn, worktree_config, data,
2084 CONFIG_SCOPE_WORKTREE,
2085 NULL);
2086 }
2087
2088 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
2089 die(_("unable to parse command-line config"));
2090
2091 free(system_config);
2092 free(xdg_config);
2093 free(user_config);
2094 free(repo_config);
2095 free(worktree_config);
2096 return ret;
2097 }
2098
2099 int config_with_options(config_fn_t fn, void *data,
2100 struct git_config_source *config_source,
2101 struct repository *repo,
2102 const struct config_options *opts)
2103 {
2104 struct config_include_data inc = CONFIG_INCLUDE_INIT;
2105 int ret;
2106
2107 if (opts->respect_includes) {
2108 inc.fn = fn;
2109 inc.data = data;
2110 inc.opts = opts;
2111 inc.repo = repo;
2112 inc.config_source = config_source;
2113 fn = git_config_include;
2114 data = &inc;
2115 }
2116
2117 /*
2118 * If we have a specific filename, use it. Otherwise, follow the
2119 * regular lookup sequence.
2120 */
2121 if (config_source && config_source->use_stdin) {
2122 ret = git_config_from_stdin(fn, data, config_source->scope);
2123 } else if (config_source && config_source->file) {
2124 ret = git_config_from_file_with_options(fn, config_source->file,
2125 data, config_source->scope,
2126 NULL);
2127 } else if (config_source && config_source->blob) {
2128 ret = git_config_from_blob_ref(fn, repo, config_source->blob,
2129 data, config_source->scope);
2130 } else {
2131 ret = do_git_config_sequence(opts, repo, fn, data);
2132 }
2133
2134 if (inc.remote_urls) {
2135 string_list_clear(inc.remote_urls, 0);
2136 FREE_AND_NULL(inc.remote_urls);
2137 }
2138 return ret;
2139 }
2140
2141 static void configset_iter(struct config_set *set, config_fn_t fn, void *data)
2142 {
2143 int i, value_index;
2144 struct string_list *values;
2145 struct config_set_element *entry;
2146 struct configset_list *list = &set->list;
2147 struct config_context ctx = CONFIG_CONTEXT_INIT;
2148
2149 for (i = 0; i < list->nr; i++) {
2150 entry = list->items[i].e;
2151 value_index = list->items[i].value_index;
2152 values = &entry->value_list;
2153
2154 ctx.kvi = values->items[value_index].util;
2155 if (fn(entry->key, values->items[value_index].string, &ctx, data) < 0)
2156 git_die_config_linenr(entry->key,
2157 ctx.kvi->filename,
2158 ctx.kvi->linenr);
2159 }
2160 }
2161
2162 void read_early_config(config_fn_t cb, void *data)
2163 {
2164 struct config_options opts = {0};
2165 struct strbuf commondir = STRBUF_INIT;
2166 struct strbuf gitdir = STRBUF_INIT;
2167
2168 opts.respect_includes = 1;
2169
2170 if (have_git_dir()) {
2171 opts.commondir = get_git_common_dir();
2172 opts.git_dir = get_git_dir();
2173 /*
2174 * When setup_git_directory() was not yet asked to discover the
2175 * GIT_DIR, we ask discover_git_directory() to figure out whether there
2176 * is any repository config we should use (but unlike
2177 * setup_git_directory_gently(), no global state is changed, most
2178 * notably, the current working directory is still the same after the
2179 * call).
2180 */
2181 } else if (!discover_git_directory(&commondir, &gitdir)) {
2182 opts.commondir = commondir.buf;
2183 opts.git_dir = gitdir.buf;
2184 }
2185
2186 config_with_options(cb, data, NULL, NULL, &opts);
2187
2188 strbuf_release(&commondir);
2189 strbuf_release(&gitdir);
2190 }
2191
2192 /*
2193 * Read config but only enumerate system and global settings.
2194 * Omit any repo-local, worktree-local, or command-line settings.
2195 */
2196 void read_very_early_config(config_fn_t cb, void *data)
2197 {
2198 struct config_options opts = { 0 };
2199
2200 opts.respect_includes = 1;
2201 opts.ignore_repo = 1;
2202 opts.ignore_worktree = 1;
2203 opts.ignore_cmdline = 1;
2204 opts.system_gently = 1;
2205
2206 config_with_options(cb, data, NULL, NULL, &opts);
2207 }
2208
2209 RESULT_MUST_BE_USED
2210 static int configset_find_element(struct config_set *set, const char *key,
2211 struct config_set_element **dest)
2212 {
2213 struct config_set_element k;
2214 struct config_set_element *found_entry;
2215 char *normalized_key;
2216 int ret;
2217
2218 /*
2219 * `key` may come from the user, so normalize it before using it
2220 * for querying entries from the hashmap.
2221 */
2222 ret = git_config_parse_key(key, &normalized_key, NULL);
2223 if (ret)
2224 return ret;
2225
2226 hashmap_entry_init(&k.ent, strhash(normalized_key));
2227 k.key = normalized_key;
2228 found_entry = hashmap_get_entry(&set->config_hash, &k, ent, NULL);
2229 free(normalized_key);
2230 *dest = found_entry;
2231 return 0;
2232 }
2233
2234 static int configset_add_value(const struct key_value_info *kvi_p,
2235 struct config_set *set, const char *key,
2236 const char *value)
2237 {
2238 struct config_set_element *e;
2239 struct string_list_item *si;
2240 struct configset_list_item *l_item;
2241 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
2242 int ret;
2243
2244 ret = configset_find_element(set, key, &e);
2245 if (ret)
2246 return ret;
2247 /*
2248 * Since the keys are being fed by git_config*() callback mechanism, they
2249 * are already normalized. So simply add them without any further munging.
2250 */
2251 if (!e) {
2252 e = xmalloc(sizeof(*e));
2253 hashmap_entry_init(&e->ent, strhash(key));
2254 e->key = xstrdup(key);
2255 string_list_init_dup(&e->value_list);
2256 hashmap_add(&set->config_hash, &e->ent);
2257 }
2258 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
2259
2260 ALLOC_GROW(set->list.items, set->list.nr + 1, set->list.alloc);
2261 l_item = &set->list.items[set->list.nr++];
2262 l_item->e = e;
2263 l_item->value_index = e->value_list.nr - 1;
2264
2265 *kv_info = *kvi_p;
2266 si->util = kv_info;
2267
2268 return 0;
2269 }
2270
2271 static int config_set_element_cmp(const void *cmp_data UNUSED,
2272 const struct hashmap_entry *eptr,
2273 const struct hashmap_entry *entry_or_key,
2274 const void *keydata UNUSED)
2275 {
2276 const struct config_set_element *e1, *e2;
2277
2278 e1 = container_of(eptr, const struct config_set_element, ent);
2279 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2280
2281 return strcmp(e1->key, e2->key);
2282 }
2283
2284 void git_configset_init(struct config_set *set)
2285 {
2286 hashmap_init(&set->config_hash, config_set_element_cmp, NULL, 0);
2287 set->hash_initialized = 1;
2288 set->list.nr = 0;
2289 set->list.alloc = 0;
2290 set->list.items = NULL;
2291 }
2292
2293 void git_configset_clear(struct config_set *set)
2294 {
2295 struct config_set_element *entry;
2296 struct hashmap_iter iter;
2297 if (!set->hash_initialized)
2298 return;
2299
2300 hashmap_for_each_entry(&set->config_hash, &iter, entry,
2301 ent /* member name */) {
2302 free(entry->key);
2303 string_list_clear(&entry->value_list, 1);
2304 }
2305 hashmap_clear_and_free(&set->config_hash, struct config_set_element, ent);
2306 set->hash_initialized = 0;
2307 free(set->list.items);
2308 set->list.nr = 0;
2309 set->list.alloc = 0;
2310 set->list.items = NULL;
2311 }
2312
2313 static int config_set_callback(const char *key, const char *value,
2314 const struct config_context *ctx,
2315 void *cb)
2316 {
2317 struct config_set *set = cb;
2318 configset_add_value(ctx->kvi, set, key, value);
2319 return 0;
2320 }
2321
2322 int git_configset_add_file(struct config_set *set, const char *filename)
2323 {
2324 return git_config_from_file(config_set_callback, filename, set);
2325 }
2326
2327 int git_configset_get_value(struct config_set *set, const char *key,
2328 const char **value, struct key_value_info *kvi)
2329 {
2330 const struct string_list *values = NULL;
2331 int ret;
2332 struct string_list_item item;
2333 /*
2334 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2335 * queried key in the files of the configset, the value returned will be the last
2336 * value in the value list for that key.
2337 */
2338 if ((ret = git_configset_get_value_multi(set, key, &values)))
2339 return ret;
2340
2341 assert(values->nr > 0);
2342 item = values->items[values->nr - 1];
2343 *value = item.string;
2344 if (kvi)
2345 *kvi = *((struct key_value_info *)item.util);
2346 return 0;
2347 }
2348
2349 int git_configset_get_value_multi(struct config_set *set, const char *key,
2350 const struct string_list **dest)
2351 {
2352 struct config_set_element *e;
2353 int ret;
2354
2355 if ((ret = configset_find_element(set, key, &e)))
2356 return ret;
2357 else if (!e)
2358 return 1;
2359 *dest = &e->value_list;
2360
2361 return 0;
2362 }
2363
2364 static int check_multi_string(struct string_list_item *item, void *util)
2365 {
2366 return item->string ? 0 : config_error_nonbool(util);
2367 }
2368
2369 int git_configset_get_string_multi(struct config_set *cs, const char *key,
2370 const struct string_list **dest)
2371 {
2372 int ret;
2373
2374 if ((ret = git_configset_get_value_multi(cs, key, dest)))
2375 return ret;
2376 if ((ret = for_each_string_list((struct string_list *)*dest,
2377 check_multi_string, (void *)key)))
2378 return ret;
2379
2380 return 0;
2381 }
2382
2383 int git_configset_get(struct config_set *set, const char *key)
2384 {
2385 struct config_set_element *e;
2386 int ret;
2387
2388 if ((ret = configset_find_element(set, key, &e)))
2389 return ret;
2390 else if (!e)
2391 return 1;
2392 return 0;
2393 }
2394
2395 int git_configset_get_string(struct config_set *set, const char *key, char **dest)
2396 {
2397 const char *value;
2398 if (!git_configset_get_value(set, key, &value, NULL))
2399 return git_config_string((const char **)dest, key, value);
2400 else
2401 return 1;
2402 }
2403
2404 static int git_configset_get_string_tmp(struct config_set *set, const char *key,
2405 const char **dest)
2406 {
2407 const char *value;
2408 if (!git_configset_get_value(set, key, &value, NULL)) {
2409 if (!value)
2410 return config_error_nonbool(key);
2411 *dest = value;
2412 return 0;
2413 } else {
2414 return 1;
2415 }
2416 }
2417
2418 int git_configset_get_int(struct config_set *set, const char *key, int *dest)
2419 {
2420 const char *value;
2421 struct key_value_info kvi;
2422
2423 if (!git_configset_get_value(set, key, &value, &kvi)) {
2424 *dest = git_config_int(key, value, &kvi);
2425 return 0;
2426 } else
2427 return 1;
2428 }
2429
2430 int git_configset_get_ulong(struct config_set *set, const char *key, unsigned long *dest)
2431 {
2432 const char *value;
2433 struct key_value_info kvi;
2434
2435 if (!git_configset_get_value(set, key, &value, &kvi)) {
2436 *dest = git_config_ulong(key, value, &kvi);
2437 return 0;
2438 } else
2439 return 1;
2440 }
2441
2442 int git_configset_get_bool(struct config_set *set, const char *key, int *dest)
2443 {
2444 const char *value;
2445 if (!git_configset_get_value(set, key, &value, NULL)) {
2446 *dest = git_config_bool(key, value);
2447 return 0;
2448 } else
2449 return 1;
2450 }
2451
2452 int git_configset_get_bool_or_int(struct config_set *set, const char *key,
2453 int *is_bool, int *dest)
2454 {
2455 const char *value;
2456 struct key_value_info kvi;
2457
2458 if (!git_configset_get_value(set, key, &value, &kvi)) {
2459 *dest = git_config_bool_or_int(key, value, &kvi, is_bool);
2460 return 0;
2461 } else
2462 return 1;
2463 }
2464
2465 int git_configset_get_maybe_bool(struct config_set *set, const char *key, int *dest)
2466 {
2467 const char *value;
2468 if (!git_configset_get_value(set, key, &value, NULL)) {
2469 *dest = git_parse_maybe_bool(value);
2470 if (*dest == -1)
2471 return -1;
2472 return 0;
2473 } else
2474 return 1;
2475 }
2476
2477 int git_configset_get_pathname(struct config_set *set, const char *key, const char **dest)
2478 {
2479 const char *value;
2480 if (!git_configset_get_value(set, key, &value, NULL))
2481 return git_config_pathname(dest, key, value);
2482 else
2483 return 1;
2484 }
2485
2486 /* Functions use to read configuration from a repository */
2487 static void repo_read_config(struct repository *repo)
2488 {
2489 struct config_options opts = { 0 };
2490
2491 opts.respect_includes = 1;
2492 opts.commondir = repo->commondir;
2493 opts.git_dir = repo->gitdir;
2494
2495 if (!repo->config)
2496 CALLOC_ARRAY(repo->config, 1);
2497 else
2498 git_configset_clear(repo->config);
2499
2500 git_configset_init(repo->config);
2501 if (config_with_options(config_set_callback, repo->config, NULL,
2502 repo, &opts) < 0)
2503 /*
2504 * config_with_options() normally returns only
2505 * zero, as most errors are fatal, and
2506 * non-fatal potential errors are guarded by "if"
2507 * statements that are entered only when no error is
2508 * possible.
2509 *
2510 * If we ever encounter a non-fatal error, it means
2511 * something went really wrong and we should stop
2512 * immediately.
2513 */
2514 die(_("unknown error occurred while reading the configuration files"));
2515 }
2516
2517 static void git_config_check_init(struct repository *repo)
2518 {
2519 if (repo->config && repo->config->hash_initialized)
2520 return;
2521 repo_read_config(repo);
2522 }
2523
2524 static void repo_config_clear(struct repository *repo)
2525 {
2526 if (!repo->config || !repo->config->hash_initialized)
2527 return;
2528 git_configset_clear(repo->config);
2529 }
2530
2531 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2532 {
2533 git_config_check_init(repo);
2534 configset_iter(repo->config, fn, data);
2535 }
2536
2537 int repo_config_get(struct repository *repo, const char *key)
2538 {
2539 git_config_check_init(repo);
2540 return git_configset_get(repo->config, key);
2541 }
2542
2543 int repo_config_get_value(struct repository *repo,
2544 const char *key, const char **value)
2545 {
2546 git_config_check_init(repo);
2547 return git_configset_get_value(repo->config, key, value, NULL);
2548 }
2549
2550 int repo_config_get_value_multi(struct repository *repo, const char *key,
2551 const struct string_list **dest)
2552 {
2553 git_config_check_init(repo);
2554 return git_configset_get_value_multi(repo->config, key, dest);
2555 }
2556
2557 int repo_config_get_string_multi(struct repository *repo, const char *key,
2558 const struct string_list **dest)
2559 {
2560 git_config_check_init(repo);
2561 return git_configset_get_string_multi(repo->config, key, dest);
2562 }
2563
2564 int repo_config_get_string(struct repository *repo,
2565 const char *key, char **dest)
2566 {
2567 int ret;
2568 git_config_check_init(repo);
2569 ret = git_configset_get_string(repo->config, key, dest);
2570 if (ret < 0)
2571 git_die_config(key, NULL);
2572 return ret;
2573 }
2574
2575 int repo_config_get_string_tmp(struct repository *repo,
2576 const char *key, const char **dest)
2577 {
2578 int ret;
2579 git_config_check_init(repo);
2580 ret = git_configset_get_string_tmp(repo->config, key, dest);
2581 if (ret < 0)
2582 git_die_config(key, NULL);
2583 return ret;
2584 }
2585
2586 int repo_config_get_int(struct repository *repo,
2587 const char *key, int *dest)
2588 {
2589 git_config_check_init(repo);
2590 return git_configset_get_int(repo->config, key, dest);
2591 }
2592
2593 int repo_config_get_ulong(struct repository *repo,
2594 const char *key, unsigned long *dest)
2595 {
2596 git_config_check_init(repo);
2597 return git_configset_get_ulong(repo->config, key, dest);
2598 }
2599
2600 int repo_config_get_bool(struct repository *repo,
2601 const char *key, int *dest)
2602 {
2603 git_config_check_init(repo);
2604 return git_configset_get_bool(repo->config, key, dest);
2605 }
2606
2607 int repo_config_get_bool_or_int(struct repository *repo,
2608 const char *key, int *is_bool, int *dest)
2609 {
2610 git_config_check_init(repo);
2611 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2612 }
2613
2614 int repo_config_get_maybe_bool(struct repository *repo,
2615 const char *key, int *dest)
2616 {
2617 git_config_check_init(repo);
2618 return git_configset_get_maybe_bool(repo->config, key, dest);
2619 }
2620
2621 int repo_config_get_pathname(struct repository *repo,
2622 const char *key, const char **dest)
2623 {
2624 int ret;
2625 git_config_check_init(repo);
2626 ret = git_configset_get_pathname(repo->config, key, dest);
2627 if (ret < 0)
2628 git_die_config(key, NULL);
2629 return ret;
2630 }
2631
2632 /* Read values into protected_config. */
2633 static void read_protected_config(void)
2634 {
2635 struct config_options opts = {
2636 .respect_includes = 1,
2637 .ignore_repo = 1,
2638 .ignore_worktree = 1,
2639 .system_gently = 1,
2640 };
2641
2642 git_configset_init(&protected_config);
2643 config_with_options(config_set_callback, &protected_config, NULL,
2644 NULL, &opts);
2645 }
2646
2647 void git_protected_config(config_fn_t fn, void *data)
2648 {
2649 if (!protected_config.hash_initialized)
2650 read_protected_config();
2651 configset_iter(&protected_config, fn, data);
2652 }
2653
2654 /* Functions used historically to read configuration from 'the_repository' */
2655 void git_config(config_fn_t fn, void *data)
2656 {
2657 repo_config(the_repository, fn, data);
2658 }
2659
2660 void git_config_clear(void)
2661 {
2662 repo_config_clear(the_repository);
2663 }
2664
2665 int git_config_get(const char *key)
2666 {
2667 return repo_config_get(the_repository, key);
2668 }
2669
2670 int git_config_get_value(const char *key, const char **value)
2671 {
2672 return repo_config_get_value(the_repository, key, value);
2673 }
2674
2675 int git_config_get_value_multi(const char *key, const struct string_list **dest)
2676 {
2677 return repo_config_get_value_multi(the_repository, key, dest);
2678 }
2679
2680 int git_config_get_string_multi(const char *key,
2681 const struct string_list **dest)
2682 {
2683 return repo_config_get_string_multi(the_repository, key, dest);
2684 }
2685
2686 int git_config_get_string(const char *key, char **dest)
2687 {
2688 return repo_config_get_string(the_repository, key, dest);
2689 }
2690
2691 int git_config_get_string_tmp(const char *key, const char **dest)
2692 {
2693 return repo_config_get_string_tmp(the_repository, key, dest);
2694 }
2695
2696 int git_config_get_int(const char *key, int *dest)
2697 {
2698 return repo_config_get_int(the_repository, key, dest);
2699 }
2700
2701 int git_config_get_ulong(const char *key, unsigned long *dest)
2702 {
2703 return repo_config_get_ulong(the_repository, key, dest);
2704 }
2705
2706 int git_config_get_bool(const char *key, int *dest)
2707 {
2708 return repo_config_get_bool(the_repository, key, dest);
2709 }
2710
2711 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2712 {
2713 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2714 }
2715
2716 int git_config_get_maybe_bool(const char *key, int *dest)
2717 {
2718 return repo_config_get_maybe_bool(the_repository, key, dest);
2719 }
2720
2721 int git_config_get_pathname(const char *key, const char **dest)
2722 {
2723 return repo_config_get_pathname(the_repository, key, dest);
2724 }
2725
2726 int git_config_get_expiry(const char *key, const char **output)
2727 {
2728 int ret = git_config_get_string(key, (char **)output);
2729 if (ret)
2730 return ret;
2731 if (strcmp(*output, "now")) {
2732 timestamp_t now = approxidate("now");
2733 if (approxidate(*output) >= now)
2734 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2735 }
2736 return ret;
2737 }
2738
2739 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2740 {
2741 const char *expiry_string;
2742 intmax_t days;
2743 timestamp_t when;
2744
2745 if (git_config_get_string_tmp(key, &expiry_string))
2746 return 1; /* no such thing */
2747
2748 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2749 const int scale = 86400;
2750 *expiry = now - days * scale;
2751 return 0;
2752 }
2753
2754 if (!parse_expiry_date(expiry_string, &when)) {
2755 *expiry = when;
2756 return 0;
2757 }
2758 return -1; /* thing exists but cannot be parsed */
2759 }
2760
2761 int git_config_get_split_index(void)
2762 {
2763 int val;
2764
2765 if (!git_config_get_maybe_bool("core.splitindex", &val))
2766 return val;
2767
2768 return -1; /* default value */
2769 }
2770
2771 int git_config_get_max_percent_split_change(void)
2772 {
2773 int val = -1;
2774
2775 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2776 if (0 <= val && val <= 100)
2777 return val;
2778
2779 return error(_("splitIndex.maxPercentChange value '%d' "
2780 "should be between 0 and 100"), val);
2781 }
2782
2783 return -1; /* default value */
2784 }
2785
2786 int git_config_get_index_threads(int *dest)
2787 {
2788 int is_bool, val;
2789
2790 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2791 if (val) {
2792 *dest = val;
2793 return 0;
2794 }
2795
2796 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2797 if (is_bool)
2798 *dest = val ? 0 : 1;
2799 else
2800 *dest = val;
2801 return 0;
2802 }
2803
2804 return 1;
2805 }
2806
2807 NORETURN
2808 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2809 {
2810 if (!filename)
2811 die(_("unable to parse '%s' from command-line config"), key);
2812 else
2813 die(_("bad config variable '%s' in file '%s' at line %d"),
2814 key, filename, linenr);
2815 }
2816
2817 NORETURN __attribute__((format(printf, 2, 3)))
2818 void git_die_config(const char *key, const char *err, ...)
2819 {
2820 const struct string_list *values;
2821 struct key_value_info *kv_info;
2822 report_fn error_fn = get_error_routine();
2823
2824 if (err) {
2825 va_list params;
2826 va_start(params, err);
2827 error_fn(err, params);
2828 va_end(params);
2829 }
2830 if (git_config_get_value_multi(key, &values))
2831 BUG("for key '%s' we must have a value to report on", key);
2832 kv_info = values->items[values->nr - 1].util;
2833 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2834 }
2835
2836 /*
2837 * Find all the stuff for git_config_set() below.
2838 */
2839
2840 struct config_store_data {
2841 size_t baselen;
2842 char *key;
2843 int do_not_match;
2844 const char *fixed_value;
2845 regex_t *value_pattern;
2846 int multi_replace;
2847 struct {
2848 size_t begin, end;
2849 enum config_event_t type;
2850 int is_keys_section;
2851 } *parsed;
2852 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2853 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2854 };
2855 #define CONFIG_STORE_INIT { 0 }
2856
2857 static void config_store_data_clear(struct config_store_data *store)
2858 {
2859 free(store->key);
2860 if (store->value_pattern != NULL &&
2861 store->value_pattern != CONFIG_REGEX_NONE) {
2862 regfree(store->value_pattern);
2863 free(store->value_pattern);
2864 }
2865 free(store->parsed);
2866 free(store->seen);
2867 memset(store, 0, sizeof(*store));
2868 }
2869
2870 static int matches(const char *key, const char *value,
2871 const struct config_store_data *store)
2872 {
2873 if (strcmp(key, store->key))
2874 return 0; /* not ours */
2875 if (store->fixed_value)
2876 return !strcmp(store->fixed_value, value);
2877 if (!store->value_pattern)
2878 return 1; /* always matches */
2879 if (store->value_pattern == CONFIG_REGEX_NONE)
2880 return 0; /* never matches */
2881
2882 return store->do_not_match ^
2883 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
2884 }
2885
2886 static int store_aux_event(enum config_event_t type, size_t begin, size_t end,
2887 struct config_source *cs, void *data)
2888 {
2889 struct config_store_data *store = data;
2890
2891 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2892 store->parsed[store->parsed_nr].begin = begin;
2893 store->parsed[store->parsed_nr].end = end;
2894 store->parsed[store->parsed_nr].type = type;
2895
2896 if (type == CONFIG_EVENT_SECTION) {
2897 int (*cmpfn)(const char *, const char *, size_t);
2898
2899 if (cs->var.len < 2 || cs->var.buf[cs->var.len - 1] != '.')
2900 return error(_("invalid section name '%s'"), cs->var.buf);
2901
2902 if (cs->subsection_case_sensitive)
2903 cmpfn = strncasecmp;
2904 else
2905 cmpfn = strncmp;
2906
2907 /* Is this the section we were looking for? */
2908 store->is_keys_section =
2909 store->parsed[store->parsed_nr].is_keys_section =
2910 cs->var.len - 1 == store->baselen &&
2911 !cmpfn(cs->var.buf, store->key, store->baselen);
2912 if (store->is_keys_section) {
2913 store->section_seen = 1;
2914 ALLOC_GROW(store->seen, store->seen_nr + 1,
2915 store->seen_alloc);
2916 store->seen[store->seen_nr] = store->parsed_nr;
2917 }
2918 }
2919
2920 store->parsed_nr++;
2921
2922 return 0;
2923 }
2924
2925 static int store_aux(const char *key, const char *value,
2926 const struct config_context *ctx UNUSED, void *cb)
2927 {
2928 struct config_store_data *store = cb;
2929
2930 if (store->key_seen) {
2931 if (matches(key, value, store)) {
2932 if (store->seen_nr == 1 && store->multi_replace == 0) {
2933 warning(_("%s has multiple values"), key);
2934 }
2935
2936 ALLOC_GROW(store->seen, store->seen_nr + 1,
2937 store->seen_alloc);
2938
2939 store->seen[store->seen_nr] = store->parsed_nr;
2940 store->seen_nr++;
2941 }
2942 } else if (store->is_keys_section) {
2943 /*
2944 * Do not increment matches yet: this may not be a match, but we
2945 * are in the desired section.
2946 */
2947 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2948 store->seen[store->seen_nr] = store->parsed_nr;
2949 store->section_seen = 1;
2950
2951 if (matches(key, value, store)) {
2952 store->seen_nr++;
2953 store->key_seen = 1;
2954 }
2955 }
2956
2957 return 0;
2958 }
2959
2960 static int write_error(const char *filename)
2961 {
2962 error(_("failed to write new configuration file %s"), filename);
2963
2964 /* Same error code as "failed to rename". */
2965 return 4;
2966 }
2967
2968 static struct strbuf store_create_section(const char *key,
2969 const struct config_store_data *store)
2970 {
2971 const char *dot;
2972 size_t i;
2973 struct strbuf sb = STRBUF_INIT;
2974
2975 dot = memchr(key, '.', store->baselen);
2976 if (dot) {
2977 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2978 for (i = dot - key + 1; i < store->baselen; i++) {
2979 if (key[i] == '"' || key[i] == '\\')
2980 strbuf_addch(&sb, '\\');
2981 strbuf_addch(&sb, key[i]);
2982 }
2983 strbuf_addstr(&sb, "\"]\n");
2984 } else {
2985 strbuf_addch(&sb, '[');
2986 strbuf_add(&sb, key, store->baselen);
2987 strbuf_addstr(&sb, "]\n");
2988 }
2989
2990 return sb;
2991 }
2992
2993 static ssize_t write_section(int fd, const char *key,
2994 const struct config_store_data *store)
2995 {
2996 struct strbuf sb = store_create_section(key, store);
2997 ssize_t ret;
2998
2999 ret = write_in_full(fd, sb.buf, sb.len);
3000 strbuf_release(&sb);
3001
3002 return ret;
3003 }
3004
3005 static ssize_t write_pair(int fd, const char *key, const char *value,
3006 const struct config_store_data *store)
3007 {
3008 int i;
3009 ssize_t ret;
3010 const char *quote = "";
3011 struct strbuf sb = STRBUF_INIT;
3012
3013 /*
3014 * Check to see if the value needs to be surrounded with a dq pair.
3015 * Note that problematic characters are always backslash-quoted; this
3016 * check is about not losing leading or trailing SP and strings that
3017 * follow beginning-of-comment characters (i.e. ';' and '#') by the
3018 * configuration parser.
3019 */
3020 if (value[0] == ' ')
3021 quote = "\"";
3022 for (i = 0; value[i]; i++)
3023 if (value[i] == ';' || value[i] == '#')
3024 quote = "\"";
3025 if (i && value[i - 1] == ' ')
3026 quote = "\"";
3027
3028 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
3029
3030 for (i = 0; value[i]; i++)
3031 switch (value[i]) {
3032 case '\n':
3033 strbuf_addstr(&sb, "\\n");
3034 break;
3035 case '\t':
3036 strbuf_addstr(&sb, "\\t");
3037 break;
3038 case '"':
3039 case '\\':
3040 strbuf_addch(&sb, '\\');
3041 /* fallthrough */
3042 default:
3043 strbuf_addch(&sb, value[i]);
3044 break;
3045 }
3046 strbuf_addf(&sb, "%s\n", quote);
3047
3048 ret = write_in_full(fd, sb.buf, sb.len);
3049 strbuf_release(&sb);
3050
3051 return ret;
3052 }
3053
3054 /*
3055 * If we are about to unset the last key(s) in a section, and if there are
3056 * no comments surrounding (or included in) the section, we will want to
3057 * extend begin/end to remove the entire section.
3058 *
3059 * Note: the parameter `seen_ptr` points to the index into the store.seen
3060 * array. * This index may be incremented if a section has more than one
3061 * entry (which all are to be removed).
3062 */
3063 static void maybe_remove_section(struct config_store_data *store,
3064 size_t *begin_offset, size_t *end_offset,
3065 int *seen_ptr)
3066 {
3067 size_t begin;
3068 int i, seen, section_seen = 0;
3069
3070 /*
3071 * First, ensure that this is the first key, and that there are no
3072 * comments before the entry nor before the section header.
3073 */
3074 seen = *seen_ptr;
3075 for (i = store->seen[seen]; i > 0; i--) {
3076 enum config_event_t type = store->parsed[i - 1].type;
3077
3078 if (type == CONFIG_EVENT_COMMENT)
3079 /* There is a comment before this entry or section */
3080 return;
3081 if (type == CONFIG_EVENT_ENTRY) {
3082 if (!section_seen)
3083 /* This is not the section's first entry. */
3084 return;
3085 /* We encountered no comment before the section. */
3086 break;
3087 }
3088 if (type == CONFIG_EVENT_SECTION) {
3089 if (!store->parsed[i - 1].is_keys_section)
3090 break;
3091 section_seen = 1;
3092 }
3093 }
3094 begin = store->parsed[i].begin;
3095
3096 /*
3097 * Next, make sure that we are removing the last key(s) in the section,
3098 * and that there are no comments that are possibly about the current
3099 * section.
3100 */
3101 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
3102 enum config_event_t type = store->parsed[i].type;
3103
3104 if (type == CONFIG_EVENT_COMMENT)
3105 return;
3106 if (type == CONFIG_EVENT_SECTION) {
3107 if (store->parsed[i].is_keys_section)
3108 continue;
3109 break;
3110 }
3111 if (type == CONFIG_EVENT_ENTRY) {
3112 if (++seen < store->seen_nr &&
3113 i == store->seen[seen])
3114 /* We want to remove this entry, too */
3115 continue;
3116 /* There is another entry in this section. */
3117 return;
3118 }
3119 }
3120
3121 /*
3122 * We are really removing the last entry/entries from this section, and
3123 * there are no enclosed or surrounding comments. Remove the entire,
3124 * now-empty section.
3125 */
3126 *seen_ptr = seen;
3127 *begin_offset = begin;
3128 if (i < store->parsed_nr)
3129 *end_offset = store->parsed[i].begin;
3130 else
3131 *end_offset = store->parsed[store->parsed_nr - 1].end;
3132 }
3133
3134 int git_config_set_in_file_gently(const char *config_filename,
3135 const char *key, const char *value)
3136 {
3137 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
3138 }
3139
3140 void git_config_set_in_file(const char *config_filename,
3141 const char *key, const char *value)
3142 {
3143 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
3144 }
3145
3146 int git_config_set_gently(const char *key, const char *value)
3147 {
3148 return git_config_set_multivar_gently(key, value, NULL, 0);
3149 }
3150
3151 int repo_config_set_worktree_gently(struct repository *r,
3152 const char *key, const char *value)
3153 {
3154 /* Only use worktree-specific config if it is already enabled. */
3155 if (r->repository_format_worktree_config) {
3156 char *file = repo_git_path(r, "config.worktree");
3157 int ret = git_config_set_multivar_in_file_gently(
3158 file, key, value, NULL, 0);
3159 free(file);
3160 return ret;
3161 }
3162 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3163 }
3164
3165 void git_config_set(const char *key, const char *value)
3166 {
3167 git_config_set_multivar(key, value, NULL, 0);
3168
3169 trace2_cmd_set_config(key, value);
3170 }
3171
3172 /*
3173 * If value==NULL, unset in (remove from) config,
3174 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
3175 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
3176 * (only add a new one)
3177 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
3178 * key/values are removed before a single new pair is written. If the
3179 * flag is not present, then replace only the first match.
3180 *
3181 * Returns 0 on success.
3182 *
3183 * This function does this:
3184 *
3185 * - it locks the config file by creating ".git/config.lock"
3186 *
3187 * - it then parses the config using store_aux() as validator to find
3188 * the position on the key/value pair to replace. If it is to be unset,
3189 * it must be found exactly once.
3190 *
3191 * - the config file is mmap()ed and the part before the match (if any) is
3192 * written to the lock file, then the changed part and the rest.
3193 *
3194 * - the config file is removed and the lock file rename()d to it.
3195 *
3196 */
3197 int git_config_set_multivar_in_file_gently(const char *config_filename,
3198 const char *key, const char *value,
3199 const char *value_pattern,
3200 unsigned flags)
3201 {
3202 int fd = -1, in_fd = -1;
3203 int ret;
3204 struct lock_file lock = LOCK_INIT;
3205 char *filename_buf = NULL;
3206 char *contents = NULL;
3207 size_t contents_sz;
3208 struct config_store_data store = CONFIG_STORE_INIT;
3209
3210 /* parse-key returns negative; flip the sign to feed exit(3) */
3211 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
3212 if (ret)
3213 goto out_free;
3214
3215 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
3216
3217 if (!config_filename)
3218 config_filename = filename_buf = git_pathdup("config");
3219
3220 /*
3221 * The lock serves a purpose in addition to locking: the new
3222 * contents of .git/config will be written into it.
3223 */
3224 fd = hold_lock_file_for_update(&lock, config_filename, 0);
3225 if (fd < 0) {
3226 error_errno(_("could not lock config file %s"), config_filename);
3227 ret = CONFIG_NO_LOCK;
3228 goto out_free;
3229 }
3230
3231 /*
3232 * If .git/config does not exist yet, write a minimal version.
3233 */
3234 in_fd = open(config_filename, O_RDONLY);
3235 if ( in_fd < 0 ) {
3236 if ( ENOENT != errno ) {
3237 error_errno(_("opening %s"), config_filename);
3238 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
3239 goto out_free;
3240 }
3241 /* if nothing to unset, error out */
3242 if (!value) {
3243 ret = CONFIG_NOTHING_SET;
3244 goto out_free;
3245 }
3246
3247 free(store.key);
3248 store.key = xstrdup(key);
3249 if (write_section(fd, key, &store) < 0 ||
3250 write_pair(fd, key, value, &store) < 0)
3251 goto write_err_out;
3252 } else {
3253 struct stat st;
3254 size_t copy_begin, copy_end;
3255 int i, new_line = 0;
3256 struct config_options opts;
3257
3258 if (!value_pattern)
3259 store.value_pattern = NULL;
3260 else if (value_pattern == CONFIG_REGEX_NONE)
3261 store.value_pattern = CONFIG_REGEX_NONE;
3262 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
3263 store.fixed_value = value_pattern;
3264 else {
3265 if (value_pattern[0] == '!') {
3266 store.do_not_match = 1;
3267 value_pattern++;
3268 } else
3269 store.do_not_match = 0;
3270
3271 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3272 if (regcomp(store.value_pattern, value_pattern,
3273 REG_EXTENDED)) {
3274 error(_("invalid pattern: %s"), value_pattern);
3275 FREE_AND_NULL(store.value_pattern);
3276 ret = CONFIG_INVALID_PATTERN;
3277 goto out_free;
3278 }
3279 }
3280
3281 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3282 store.parsed[0].end = 0;
3283
3284 memset(&opts, 0, sizeof(opts));
3285 opts.event_fn = store_aux_event;
3286 opts.event_fn_data = &store;
3287
3288 /*
3289 * After this, store.parsed will contain offsets of all the
3290 * parsed elements, and store.seen will contain a list of
3291 * matches, as indices into store.parsed.
3292 *
3293 * As a side effect, we make sure to transform only a valid
3294 * existing config file.
3295 */
3296 if (git_config_from_file_with_options(store_aux,
3297 config_filename,
3298 &store, CONFIG_SCOPE_UNKNOWN,
3299 &opts)) {
3300 error(_("invalid config file %s"), config_filename);
3301 ret = CONFIG_INVALID_FILE;
3302 goto out_free;
3303 }
3304
3305 /* if nothing to unset, or too many matches, error out */
3306 if ((store.seen_nr == 0 && value == NULL) ||
3307 (store.seen_nr > 1 && !store.multi_replace)) {
3308 ret = CONFIG_NOTHING_SET;
3309 goto out_free;
3310 }
3311
3312 if (fstat(in_fd, &st) == -1) {
3313 error_errno(_("fstat on %s failed"), config_filename);
3314 ret = CONFIG_INVALID_FILE;
3315 goto out_free;
3316 }
3317
3318 contents_sz = xsize_t(st.st_size);
3319 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3320 MAP_PRIVATE, in_fd, 0);
3321 if (contents == MAP_FAILED) {
3322 if (errno == ENODEV && S_ISDIR(st.st_mode))
3323 errno = EISDIR;
3324 error_errno(_("unable to mmap '%s'%s"),
3325 config_filename, mmap_os_err());
3326 ret = CONFIG_INVALID_FILE;
3327 contents = NULL;
3328 goto out_free;
3329 }
3330 close(in_fd);
3331 in_fd = -1;
3332
3333 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3334 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3335 ret = CONFIG_NO_WRITE;
3336 goto out_free;
3337 }
3338
3339 if (store.seen_nr == 0) {
3340 if (!store.seen_alloc) {
3341 /* Did not see key nor section */
3342 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3343 store.seen[0] = store.parsed_nr
3344 - !!store.parsed_nr;
3345 }
3346 store.seen_nr = 1;
3347 }
3348
3349 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3350 size_t replace_end;
3351 int j = store.seen[i];
3352
3353 new_line = 0;
3354 if (!store.key_seen) {
3355 copy_end = store.parsed[j].end;
3356 /* include '\n' when copying section header */
3357 if (copy_end > 0 && copy_end < contents_sz &&
3358 contents[copy_end - 1] != '\n' &&
3359 contents[copy_end] == '\n')
3360 copy_end++;
3361 replace_end = copy_end;
3362 } else {
3363 replace_end = store.parsed[j].end;
3364 copy_end = store.parsed[j].begin;
3365 if (!value)
3366 maybe_remove_section(&store,
3367 &copy_end,
3368 &replace_end, &i);
3369 /*
3370 * Swallow preceding white-space on the same
3371 * line.
3372 */
3373 while (copy_end > 0 ) {
3374 char c = contents[copy_end - 1];
3375
3376 if (isspace(c) && c != '\n')
3377 copy_end--;
3378 else
3379 break;
3380 }
3381 }
3382
3383 if (copy_end > 0 && contents[copy_end-1] != '\n')
3384 new_line = 1;
3385
3386 /* write the first part of the config */
3387 if (copy_end > copy_begin) {
3388 if (write_in_full(fd, contents + copy_begin,
3389 copy_end - copy_begin) < 0)
3390 goto write_err_out;
3391 if (new_line &&
3392 write_str_in_full(fd, "\n") < 0)
3393 goto write_err_out;
3394 }
3395 copy_begin = replace_end;
3396 }
3397
3398 /* write the pair (value == NULL means unset) */
3399 if (value) {
3400 if (!store.section_seen) {
3401 if (write_section(fd, key, &store) < 0)
3402 goto write_err_out;
3403 }
3404 if (write_pair(fd, key, value, &store) < 0)
3405 goto write_err_out;
3406 }
3407
3408 /* write the rest of the config */
3409 if (copy_begin < contents_sz)
3410 if (write_in_full(fd, contents + copy_begin,
3411 contents_sz - copy_begin) < 0)
3412 goto write_err_out;
3413
3414 munmap(contents, contents_sz);
3415 contents = NULL;
3416 }
3417
3418 if (commit_lock_file(&lock) < 0) {
3419 error_errno(_("could not write config file %s"), config_filename);
3420 ret = CONFIG_NO_WRITE;
3421 goto out_free;
3422 }
3423
3424 ret = 0;
3425
3426 /* Invalidate the config cache */
3427 git_config_clear();
3428
3429 out_free:
3430 rollback_lock_file(&lock);
3431 free(filename_buf);
3432 if (contents)
3433 munmap(contents, contents_sz);
3434 if (in_fd >= 0)
3435 close(in_fd);
3436 config_store_data_clear(&store);
3437 return ret;
3438
3439 write_err_out:
3440 ret = write_error(get_lock_file_path(&lock));
3441 goto out_free;
3442 }
3443
3444 void git_config_set_multivar_in_file(const char *config_filename,
3445 const char *key, const char *value,
3446 const char *value_pattern, unsigned flags)
3447 {
3448 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
3449 value_pattern, flags))
3450 return;
3451 if (value)
3452 die(_("could not set '%s' to '%s'"), key, value);
3453 else
3454 die(_("could not unset '%s'"), key);
3455 }
3456
3457 int git_config_set_multivar_gently(const char *key, const char *value,
3458 const char *value_pattern, unsigned flags)
3459 {
3460 return repo_config_set_multivar_gently(the_repository, key, value,
3461 value_pattern, flags);
3462 }
3463
3464 int repo_config_set_multivar_gently(struct repository *r, const char *key,
3465 const char *value,
3466 const char *value_pattern, unsigned flags)
3467 {
3468 char *file = repo_git_path(r, "config");
3469 int res = git_config_set_multivar_in_file_gently(file,
3470 key, value,
3471 value_pattern,
3472 flags);
3473 free(file);
3474 return res;
3475 }
3476
3477 void git_config_set_multivar(const char *key, const char *value,
3478 const char *value_pattern, unsigned flags)
3479 {
3480 git_config_set_multivar_in_file(git_path("config"),
3481 key, value, value_pattern,
3482 flags);
3483 }
3484
3485 static size_t section_name_match (const char *buf, const char *name)
3486 {
3487 size_t i = 0, j = 0;
3488 int dot = 0;
3489 if (buf[i] != '[')
3490 return 0;
3491 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3492 if (!dot && isspace(buf[i])) {
3493 dot = 1;
3494 if (name[j++] != '.')
3495 break;
3496 for (i++; isspace(buf[i]); i++)
3497 ; /* do nothing */
3498 if (buf[i] != '"')
3499 break;
3500 continue;
3501 }
3502 if (buf[i] == '\\' && dot)
3503 i++;
3504 else if (buf[i] == '"' && dot) {
3505 for (i++; isspace(buf[i]); i++)
3506 ; /* do_nothing */
3507 break;
3508 }
3509 if (buf[i] != name[j++])
3510 break;
3511 }
3512 if (buf[i] == ']' && name[j] == 0) {
3513 /*
3514 * We match, now just find the right length offset by
3515 * gobbling up any whitespace after it, as well
3516 */
3517 i++;
3518 for (; buf[i] && isspace(buf[i]); i++)
3519 ; /* do nothing */
3520 return i;
3521 }
3522 return 0;
3523 }
3524
3525 static int section_name_is_ok(const char *name)
3526 {
3527 /* Empty section names are bogus. */
3528 if (!*name)
3529 return 0;
3530
3531 /*
3532 * Before a dot, we must be alphanumeric or dash. After the first dot,
3533 * anything goes, so we can stop checking.
3534 */
3535 for (; *name && *name != '.'; name++)
3536 if (*name != '-' && !isalnum(*name))
3537 return 0;
3538 return 1;
3539 }
3540
3541 #define GIT_CONFIG_MAX_LINE_LEN (512 * 1024)
3542
3543 /* if new_name == NULL, the section is removed instead */
3544 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3545 const char *old_name,
3546 const char *new_name, int copy)
3547 {
3548 int ret = 0, remove = 0;
3549 char *filename_buf = NULL;
3550 struct lock_file lock = LOCK_INIT;
3551 int out_fd;
3552 struct strbuf buf = STRBUF_INIT;
3553 FILE *config_file = NULL;
3554 struct stat st;
3555 struct strbuf copystr = STRBUF_INIT;
3556 struct config_store_data store;
3557 uint32_t line_nr = 0;
3558
3559 memset(&store, 0, sizeof(store));
3560
3561 if (new_name && !section_name_is_ok(new_name)) {
3562 ret = error(_("invalid section name: %s"), new_name);
3563 goto out_no_rollback;
3564 }
3565
3566 if (!config_filename)
3567 config_filename = filename_buf = git_pathdup("config");
3568
3569 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3570 if (out_fd < 0) {
3571 ret = error(_("could not lock config file %s"), config_filename);
3572 goto out;
3573 }
3574
3575 if (!(config_file = fopen(config_filename, "rb"))) {
3576 ret = warn_on_fopen_errors(config_filename);
3577 if (ret)
3578 goto out;
3579 /* no config file means nothing to rename, no error */
3580 goto commit_and_out;
3581 }
3582
3583 if (fstat(fileno(config_file), &st) == -1) {
3584 ret = error_errno(_("fstat on %s failed"), config_filename);
3585 goto out;
3586 }
3587
3588 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3589 ret = error_errno(_("chmod on %s failed"),
3590 get_lock_file_path(&lock));
3591 goto out;
3592 }
3593
3594 while (!strbuf_getwholeline(&buf, config_file, '\n')) {
3595 size_t i, length;
3596 int is_section = 0;
3597 char *output = buf.buf;
3598
3599 line_nr++;
3600
3601 if (buf.len >= GIT_CONFIG_MAX_LINE_LEN) {
3602 ret = error(_("refusing to work with overly long line "
3603 "in '%s' on line %"PRIuMAX),
3604 config_filename, (uintmax_t)line_nr);
3605 goto out;
3606 }
3607
3608 for (i = 0; buf.buf[i] && isspace(buf.buf[i]); i++)
3609 ; /* do nothing */
3610 if (buf.buf[i] == '[') {
3611 /* it's a section */
3612 size_t offset;
3613 is_section = 1;
3614
3615 /*
3616 * When encountering a new section under -c we
3617 * need to flush out any section we're already
3618 * coping and begin anew. There might be
3619 * multiple [branch "$name"] sections.
3620 */
3621 if (copystr.len > 0) {
3622 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3623 ret = write_error(get_lock_file_path(&lock));
3624 goto out;
3625 }
3626 strbuf_reset(&copystr);
3627 }
3628
3629 offset = section_name_match(&buf.buf[i], old_name);
3630 if (offset > 0) {
3631 ret++;
3632 if (!new_name) {
3633 remove = 1;
3634 continue;
3635 }
3636 store.baselen = strlen(new_name);
3637 if (!copy) {
3638 if (write_section(out_fd, new_name, &store) < 0) {
3639 ret = write_error(get_lock_file_path(&lock));
3640 goto out;
3641 }
3642 /*
3643 * We wrote out the new section, with
3644 * a newline, now skip the old
3645 * section's length
3646 */
3647 output += offset + i;
3648 if (strlen(output) > 0) {
3649 /*
3650 * More content means there's
3651 * a declaration to put on the
3652 * next line; indent with a
3653 * tab
3654 */
3655 output -= 1;
3656 output[0] = '\t';
3657 }
3658 } else {
3659 strbuf_release(&copystr);
3660 copystr = store_create_section(new_name, &store);
3661 }
3662 }
3663 remove = 0;
3664 }
3665 if (remove)
3666 continue;
3667 length = strlen(output);
3668
3669 if (!is_section && copystr.len > 0) {
3670 strbuf_add(&copystr, output, length);
3671 }
3672
3673 if (write_in_full(out_fd, output, length) < 0) {
3674 ret = write_error(get_lock_file_path(&lock));
3675 goto out;
3676 }
3677 }
3678
3679 /*
3680 * Copy a trailing section at the end of the config, won't be
3681 * flushed by the usual "flush because we have a new section
3682 * logic in the loop above.
3683 */
3684 if (copystr.len > 0) {
3685 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3686 ret = write_error(get_lock_file_path(&lock));
3687 goto out;
3688 }
3689 strbuf_reset(&copystr);
3690 }
3691
3692 fclose(config_file);
3693 config_file = NULL;
3694 commit_and_out:
3695 if (commit_lock_file(&lock) < 0)
3696 ret = error_errno(_("could not write config file %s"),
3697 config_filename);
3698 out:
3699 if (config_file)
3700 fclose(config_file);
3701 rollback_lock_file(&lock);
3702 out_no_rollback:
3703 free(filename_buf);
3704 config_store_data_clear(&store);
3705 strbuf_release(&buf);
3706 strbuf_release(&copystr);
3707 return ret;
3708 }
3709
3710 int git_config_rename_section_in_file(const char *config_filename,
3711 const char *old_name, const char *new_name)
3712 {
3713 return git_config_copy_or_rename_section_in_file(config_filename,
3714 old_name, new_name, 0);
3715 }
3716
3717 int git_config_rename_section(const char *old_name, const char *new_name)
3718 {
3719 return git_config_rename_section_in_file(NULL, old_name, new_name);
3720 }
3721
3722 int git_config_copy_section_in_file(const char *config_filename,
3723 const char *old_name, const char *new_name)
3724 {
3725 return git_config_copy_or_rename_section_in_file(config_filename,
3726 old_name, new_name, 1);
3727 }
3728
3729 int git_config_copy_section(const char *old_name, const char *new_name)
3730 {
3731 return git_config_copy_section_in_file(NULL, old_name, new_name);
3732 }
3733
3734 /*
3735 * Call this to report error for your variable that should not
3736 * get a boolean value (i.e. "[my] var" means "true").
3737 */
3738 #undef config_error_nonbool
3739 int config_error_nonbool(const char *var)
3740 {
3741 return error(_("missing value for '%s'"), var);
3742 }
3743
3744 int parse_config_key(const char *var,
3745 const char *section,
3746 const char **subsection, size_t *subsection_len,
3747 const char **key)
3748 {
3749 const char *dot;
3750
3751 /* Does it start with "section." ? */
3752 if (!skip_prefix(var, section, &var) || *var != '.')
3753 return -1;
3754
3755 /*
3756 * Find the key; we don't know yet if we have a subsection, but we must
3757 * parse backwards from the end, since the subsection may have dots in
3758 * it, too.
3759 */
3760 dot = strrchr(var, '.');
3761 *key = dot + 1;
3762
3763 /* Did we have a subsection at all? */
3764 if (dot == var) {
3765 if (subsection) {
3766 *subsection = NULL;
3767 *subsection_len = 0;
3768 }
3769 }
3770 else {
3771 if (!subsection)
3772 return -1;
3773 *subsection = var + 1;
3774 *subsection_len = dot - *subsection;
3775 }
3776
3777 return 0;
3778 }
3779
3780 const char *config_origin_type_name(enum config_origin_type type)
3781 {
3782 switch (type) {
3783 case CONFIG_ORIGIN_BLOB:
3784 return "blob";
3785 case CONFIG_ORIGIN_FILE:
3786 return "file";
3787 case CONFIG_ORIGIN_STDIN:
3788 return "standard input";
3789 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3790 return "submodule-blob";
3791 case CONFIG_ORIGIN_CMDLINE:
3792 return "command line";
3793 default:
3794 BUG("unknown config origin type");
3795 }
3796 }
3797
3798 const char *config_scope_name(enum config_scope scope)
3799 {
3800 switch (scope) {
3801 case CONFIG_SCOPE_SYSTEM:
3802 return "system";
3803 case CONFIG_SCOPE_GLOBAL:
3804 return "global";
3805 case CONFIG_SCOPE_LOCAL:
3806 return "local";
3807 case CONFIG_SCOPE_WORKTREE:
3808 return "worktree";
3809 case CONFIG_SCOPE_COMMAND:
3810 return "command";
3811 case CONFIG_SCOPE_SUBMODULE:
3812 return "submodule";
3813 default:
3814 return "unknown";
3815 }
3816 }
3817
3818 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3819 {
3820 int i;
3821
3822 for (i = 0; i < nr_mapping; i++) {
3823 const char *name = mapping[i];
3824
3825 if (name && !strcasecmp(var, name))
3826 return i;
3827 }
3828 return -1;
3829 }
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