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diff: die when failing to read index in git-diff builtin
[alt-git.git] / config.c
blob3846a37be971c92153eb1ceeb65c6e612c8e173c
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 "convert.h"
15 #include "environment.h"
16 #include "gettext.h"
17 #include "ident.h"
18 #include "repository.h"
19 #include "lockfile.h"
20 #include "mailmap.h"
21 #include "exec-cmd.h"
22 #include "strbuf.h"
23 #include "quote.h"
24 #include "hashmap.h"
25 #include "string-list.h"
26 #include "object-name.h"
27 #include "object-store-ll.h"
28 #include "pager.h"
29 #include "path.h"
30 #include "utf8.h"
31 #include "dir.h"
32 #include "color.h"
33 #include "replace-object.h"
34 #include "refs.h"
35 #include "setup.h"
36 #include "strvec.h"
37 #include "trace2.h"
38 #include "wildmatch.h"
39 #include "worktree.h"
40 #include "ws.h"
41 #include "write-or-die.h"
42
43 struct config_source {
44 struct config_source *prev;
45 union {
46 FILE *file;
47 struct config_buf {
48 const char *buf;
49 size_t len;
50 size_t pos;
51 } buf;
52 } u;
53 enum config_origin_type origin_type;
54 const char *name;
55 const char *path;
56 enum config_error_action default_error_action;
57 int linenr;
58 int eof;
59 size_t total_len;
60 struct strbuf value;
61 struct strbuf var;
62 unsigned subsection_case_sensitive : 1;
63
64 int (*do_fgetc)(struct config_source *c);
65 int (*do_ungetc)(int c, struct config_source *conf);
66 long (*do_ftell)(struct config_source *c);
67 };
68 #define CONFIG_SOURCE_INIT { 0 }
69
70 static int pack_compression_seen;
71 static int zlib_compression_seen;
72
73 /*
74 * Config that comes from trusted scopes, namely:
75 * - CONFIG_SCOPE_SYSTEM (e.g. /etc/gitconfig)
76 * - CONFIG_SCOPE_GLOBAL (e.g. $HOME/.gitconfig, $XDG_CONFIG_HOME/git)
77 * - CONFIG_SCOPE_COMMAND (e.g. "-c" option, environment variables)
78 *
79 * This is declared here for code cleanliness, but unlike the other
80 * static variables, this does not hold config parser state.
81 */
82 static struct config_set protected_config;
83
84 static int config_file_fgetc(struct config_source *conf)
85 {
86 return getc_unlocked(conf->u.file);
87 }
88
89 static int config_file_ungetc(int c, struct config_source *conf)
90 {
91 return ungetc(c, conf->u.file);
92 }
93
94 static long config_file_ftell(struct config_source *conf)
95 {
96 return ftell(conf->u.file);
97 }
98
99
100 static int config_buf_fgetc(struct config_source *conf)
101 {
102 if (conf->u.buf.pos < conf->u.buf.len)
103 return conf->u.buf.buf[conf->u.buf.pos++];
104
105 return EOF;
106 }
107
108 static int config_buf_ungetc(int c, struct config_source *conf)
109 {
110 if (conf->u.buf.pos > 0) {
111 conf->u.buf.pos--;
112 if (conf->u.buf.buf[conf->u.buf.pos] != c)
113 BUG("config_buf can only ungetc the same character");
114 return c;
115 }
116
117 return EOF;
118 }
119
120 static long config_buf_ftell(struct config_source *conf)
121 {
122 return conf->u.buf.pos;
123 }
124
125 struct config_include_data {
126 int depth;
127 config_fn_t fn;
128 void *data;
129 const struct config_options *opts;
130 struct git_config_source *config_source;
131 struct repository *repo;
132
133 /*
134 * All remote URLs discovered when reading all config files.
135 */
136 struct string_list *remote_urls;
137 };
138 #define CONFIG_INCLUDE_INIT { 0 }
139
140 static int git_config_include(const char *var, const char *value,
141 const struct config_context *ctx, void *data);
142
143 #define MAX_INCLUDE_DEPTH 10
144 static const char include_depth_advice[] = N_(
145 "exceeded maximum include depth (%d) while including\n"
146 " %s\n"
147 "from\n"
148 " %s\n"
149 "This might be due to circular includes.");
150 static int handle_path_include(const struct key_value_info *kvi,
151 const char *path,
152 struct config_include_data *inc)
153 {
154 int ret = 0;
155 struct strbuf buf = STRBUF_INIT;
156 char *expanded;
157
158 if (!path)
159 return config_error_nonbool("include.path");
160
161 expanded = interpolate_path(path, 0);
162 if (!expanded)
163 return error(_("could not expand include path '%s'"), path);
164 path = expanded;
165
166 /*
167 * Use an absolute path as-is, but interpret relative paths
168 * based on the including config file.
169 */
170 if (!is_absolute_path(path)) {
171 char *slash;
172
173 if (!kvi || !kvi->path) {
174 ret = error(_("relative config includes must come from files"));
175 goto cleanup;
176 }
177
178 slash = find_last_dir_sep(kvi->path);
179 if (slash)
180 strbuf_add(&buf, kvi->path, slash - kvi->path + 1);
181 strbuf_addstr(&buf, path);
182 path = buf.buf;
183 }
184
185 if (!access_or_die(path, R_OK, 0)) {
186 if (++inc->depth > MAX_INCLUDE_DEPTH)
187 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
188 !kvi ? "<unknown>" :
189 kvi->filename ? kvi->filename :
190 "the command line");
191 ret = git_config_from_file_with_options(git_config_include, path, inc,
192 kvi->scope, NULL);
193 inc->depth--;
194 }
195 cleanup:
196 strbuf_release(&buf);
197 free(expanded);
198 return ret;
199 }
200
201 static void add_trailing_starstar_for_dir(struct strbuf *pat)
202 {
203 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
204 strbuf_addstr(pat, "**");
205 }
206
207 static int prepare_include_condition_pattern(const struct key_value_info *kvi,
208 struct strbuf *pat)
209 {
210 struct strbuf path = STRBUF_INIT;
211 char *expanded;
212 int prefix = 0;
213
214 expanded = interpolate_path(pat->buf, 1);
215 if (expanded) {
216 strbuf_reset(pat);
217 strbuf_addstr(pat, expanded);
218 free(expanded);
219 }
220
221 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
222 const char *slash;
223
224 if (!kvi || !kvi->path)
225 return error(_("relative config include "
226 "conditionals must come from files"));
227
228 strbuf_realpath(&path, kvi->path, 1);
229 slash = find_last_dir_sep(path.buf);
230 if (!slash)
231 BUG("how is this possible?");
232 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
233 prefix = slash - path.buf + 1 /* slash */;
234 } else if (!is_absolute_path(pat->buf))
235 strbuf_insertstr(pat, 0, "**/");
236
237 add_trailing_starstar_for_dir(pat);
238
239 strbuf_release(&path);
240 return prefix;
241 }
242
243 static int include_by_gitdir(const struct key_value_info *kvi,
244 const struct config_options *opts,
245 const char *cond, size_t cond_len, int icase)
246 {
247 struct strbuf text = STRBUF_INIT;
248 struct strbuf pattern = STRBUF_INIT;
249 int ret = 0, prefix;
250 const char *git_dir;
251 int already_tried_absolute = 0;
252
253 if (opts->git_dir)
254 git_dir = opts->git_dir;
255 else
256 goto done;
257
258 strbuf_realpath(&text, git_dir, 1);
259 strbuf_add(&pattern, cond, cond_len);
260 prefix = prepare_include_condition_pattern(kvi, &pattern);
261
262 again:
263 if (prefix < 0)
264 goto done;
265
266 if (prefix > 0) {
267 /*
268 * perform literal matching on the prefix part so that
269 * any wildcard character in it can't create side effects.
270 */
271 if (text.len < prefix)
272 goto done;
273 if (!icase && strncmp(pattern.buf, text.buf, prefix))
274 goto done;
275 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
276 goto done;
277 }
278
279 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
280 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
281
282 if (!ret && !already_tried_absolute) {
283 /*
284 * We've tried e.g. matching gitdir:~/work, but if
285 * ~/work is a symlink to /mnt/storage/work
286 * strbuf_realpath() will expand it, so the rule won't
287 * match. Let's match against a
288 * strbuf_add_absolute_path() version of the path,
289 * which'll do the right thing
290 */
291 strbuf_reset(&text);
292 strbuf_add_absolute_path(&text, git_dir);
293 already_tried_absolute = 1;
294 goto again;
295 }
296 done:
297 strbuf_release(&pattern);
298 strbuf_release(&text);
299 return ret;
300 }
301
302 static int include_by_branch(const char *cond, size_t cond_len)
303 {
304 int flags;
305 int ret;
306 struct strbuf pattern = STRBUF_INIT;
307 const char *refname = !the_repository->gitdir ?
308 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
309 const char *shortname;
310
311 if (!refname || !(flags & REF_ISSYMREF) ||
312 !skip_prefix(refname, "refs/heads/", &shortname))
313 return 0;
314
315 strbuf_add(&pattern, cond, cond_len);
316 add_trailing_starstar_for_dir(&pattern);
317 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
318 strbuf_release(&pattern);
319 return ret;
320 }
321
322 static int add_remote_url(const char *var, const char *value,
323 const struct config_context *ctx UNUSED, void *data)
324 {
325 struct string_list *remote_urls = data;
326 const char *remote_name;
327 size_t remote_name_len;
328 const char *key;
329
330 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
331 &key) &&
332 remote_name &&
333 !strcmp(key, "url"))
334 string_list_append(remote_urls, value);
335 return 0;
336 }
337
338 static void populate_remote_urls(struct config_include_data *inc)
339 {
340 struct config_options opts;
341
342 opts = *inc->opts;
343 opts.unconditional_remote_url = 1;
344
345 inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
346 string_list_init_dup(inc->remote_urls);
347 config_with_options(add_remote_url, inc->remote_urls,
348 inc->config_source, inc->repo, &opts);
349 }
350
351 static int forbid_remote_url(const char *var, const char *value UNUSED,
352 const struct config_context *ctx UNUSED,
353 void *data UNUSED)
354 {
355 const char *remote_name;
356 size_t remote_name_len;
357 const char *key;
358
359 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
360 &key) &&
361 remote_name &&
362 !strcmp(key, "url"))
363 die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url"));
364 return 0;
365 }
366
367 static int at_least_one_url_matches_glob(const char *glob, int glob_len,
368 struct string_list *remote_urls)
369 {
370 struct strbuf pattern = STRBUF_INIT;
371 struct string_list_item *url_item;
372 int found = 0;
373
374 strbuf_add(&pattern, glob, glob_len);
375 for_each_string_list_item(url_item, remote_urls) {
376 if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) {
377 found = 1;
378 break;
379 }
380 }
381 strbuf_release(&pattern);
382 return found;
383 }
384
385 static int include_by_remote_url(struct config_include_data *inc,
386 const char *cond, size_t cond_len)
387 {
388 if (inc->opts->unconditional_remote_url)
389 return 1;
390 if (!inc->remote_urls)
391 populate_remote_urls(inc);
392 return at_least_one_url_matches_glob(cond, cond_len,
393 inc->remote_urls);
394 }
395
396 static int include_condition_is_true(const struct key_value_info *kvi,
397 struct config_include_data *inc,
398 const char *cond, size_t cond_len)
399 {
400 const struct config_options *opts = inc->opts;
401
402 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
403 return include_by_gitdir(kvi, opts, cond, cond_len, 0);
404 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
405 return include_by_gitdir(kvi, opts, cond, cond_len, 1);
406 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
407 return include_by_branch(cond, cond_len);
408 else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond,
409 &cond_len))
410 return include_by_remote_url(inc, cond, cond_len);
411
412 /* unknown conditionals are always false */
413 return 0;
414 }
415
416 static int git_config_include(const char *var, const char *value,
417 const struct config_context *ctx,
418 void *data)
419 {
420 struct config_include_data *inc = data;
421 const char *cond, *key;
422 size_t cond_len;
423 int ret;
424
425 /*
426 * Pass along all values, including "include" directives; this makes it
427 * possible to query information on the includes themselves.
428 */
429 ret = inc->fn(var, value, ctx, inc->data);
430 if (ret < 0)
431 return ret;
432
433 if (!strcmp(var, "include.path"))
434 ret = handle_path_include(ctx->kvi, value, inc);
435
436 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
437 cond && include_condition_is_true(ctx->kvi, inc, cond, cond_len) &&
438 !strcmp(key, "path")) {
439 config_fn_t old_fn = inc->fn;
440
441 if (inc->opts->unconditional_remote_url)
442 inc->fn = forbid_remote_url;
443 ret = handle_path_include(ctx->kvi, value, inc);
444 inc->fn = old_fn;
445 }
446
447 return ret;
448 }
449
450 static void git_config_push_split_parameter(const char *key, const char *value)
451 {
452 struct strbuf env = STRBUF_INIT;
453 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
454 if (old && *old) {
455 strbuf_addstr(&env, old);
456 strbuf_addch(&env, ' ');
457 }
458 sq_quote_buf(&env, key);
459 strbuf_addch(&env, '=');
460 if (value)
461 sq_quote_buf(&env, value);
462 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
463 strbuf_release(&env);
464 }
465
466 void git_config_push_parameter(const char *text)
467 {
468 const char *value;
469
470 /*
471 * When we see:
472 *
473 * section.subsection=with=equals.key=value
474 *
475 * we cannot tell if it means:
476 *
477 * [section "subsection=with=equals"]
478 * key = value
479 *
480 * or:
481 *
482 * [section]
483 * subsection = with=equals.key=value
484 *
485 * We parse left-to-right for the first "=", meaning we'll prefer to
486 * keep the value intact over the subsection. This is historical, but
487 * also sensible since values are more likely to contain odd or
488 * untrusted input than a section name.
489 *
490 * A missing equals is explicitly allowed (as a bool-only entry).
491 */
492 value = strchr(text, '=');
493 if (value) {
494 char *key = xmemdupz(text, value - text);
495 git_config_push_split_parameter(key, value + 1);
496 free(key);
497 } else {
498 git_config_push_split_parameter(text, NULL);
499 }
500 }
501
502 void git_config_push_env(const char *spec)
503 {
504 char *key;
505 const char *env_name;
506 const char *env_value;
507
508 env_name = strrchr(spec, '=');
509 if (!env_name)
510 die(_("invalid config format: %s"), spec);
511 key = xmemdupz(spec, env_name - spec);
512 env_name++;
513 if (!*env_name)
514 die(_("missing environment variable name for configuration '%.*s'"),
515 (int)(env_name - spec - 1), spec);
516
517 env_value = getenv(env_name);
518 if (!env_value)
519 die(_("missing environment variable '%s' for configuration '%.*s'"),
520 env_name, (int)(env_name - spec - 1), spec);
521
522 git_config_push_split_parameter(key, env_value);
523 free(key);
524 }
525
526 static inline int iskeychar(int c)
527 {
528 return isalnum(c) || c == '-';
529 }
530
531 /*
532 * Auxiliary function to sanity-check and split the key into the section
533 * identifier and variable name.
534 *
535 * Returns 0 on success, -1 when there is an invalid character in the key and
536 * -2 if there is no section name in the key.
537 *
538 * store_key - pointer to char* which will hold a copy of the key with
539 * lowercase section and variable name
540 * baselen - pointer to size_t which will hold the length of the
541 * section + subsection part, can be NULL
542 */
543 int git_config_parse_key(const char *key, char **store_key, size_t *baselen_)
544 {
545 size_t i, baselen;
546 int dot;
547 const char *last_dot = strrchr(key, '.');
548
549 /*
550 * Since "key" actually contains the section name and the real
551 * key name separated by a dot, we have to know where the dot is.
552 */
553
554 if (last_dot == NULL || last_dot == key) {
555 error(_("key does not contain a section: %s"), key);
556 return -CONFIG_NO_SECTION_OR_NAME;
557 }
558
559 if (!last_dot[1]) {
560 error(_("key does not contain variable name: %s"), key);
561 return -CONFIG_NO_SECTION_OR_NAME;
562 }
563
564 baselen = last_dot - key;
565 if (baselen_)
566 *baselen_ = baselen;
567
568 /*
569 * Validate the key and while at it, lower case it for matching.
570 */
571 *store_key = xmallocz(strlen(key));
572
573 dot = 0;
574 for (i = 0; key[i]; i++) {
575 unsigned char c = key[i];
576 if (c == '.')
577 dot = 1;
578 /* Leave the extended basename untouched.. */
579 if (!dot || i > baselen) {
580 if (!iskeychar(c) ||
581 (i == baselen + 1 && !isalpha(c))) {
582 error(_("invalid key: %s"), key);
583 goto out_free_ret_1;
584 }
585 c = tolower(c);
586 } else if (c == '\n') {
587 error(_("invalid key (newline): %s"), key);
588 goto out_free_ret_1;
589 }
590 (*store_key)[i] = c;
591 }
592
593 return 0;
594
595 out_free_ret_1:
596 FREE_AND_NULL(*store_key);
597 return -CONFIG_INVALID_KEY;
598 }
599
600 static int config_parse_pair(const char *key, const char *value,
601 struct key_value_info *kvi,
602 config_fn_t fn, void *data)
603 {
604 char *canonical_name;
605 int ret;
606 struct config_context ctx = {
607 .kvi = kvi,
608 };
609
610 if (!strlen(key))
611 return error(_("empty config key"));
612 if (git_config_parse_key(key, &canonical_name, NULL))
613 return -1;
614
615 ret = (fn(canonical_name, value, &ctx, data) < 0) ? -1 : 0;
616 free(canonical_name);
617 return ret;
618 }
619
620
621 /* for values read from `git_config_from_parameters()` */
622 void kvi_from_param(struct key_value_info *out)
623 {
624 out->filename = NULL;
625 out->linenr = -1;
626 out->origin_type = CONFIG_ORIGIN_CMDLINE;
627 out->scope = CONFIG_SCOPE_COMMAND;
628 out->path = NULL;
629 }
630
631 int git_config_parse_parameter(const char *text,
632 config_fn_t fn, void *data)
633 {
634 const char *value;
635 struct strbuf **pair;
636 int ret;
637 struct key_value_info kvi = KVI_INIT;
638
639 kvi_from_param(&kvi);
640
641 pair = strbuf_split_str(text, '=', 2);
642 if (!pair[0])
643 return error(_("bogus config parameter: %s"), text);
644
645 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
646 strbuf_setlen(pair[0], pair[0]->len - 1);
647 value = pair[1] ? pair[1]->buf : "";
648 } else {
649 value = NULL;
650 }
651
652 strbuf_trim(pair[0]);
653 if (!pair[0]->len) {
654 strbuf_list_free(pair);
655 return error(_("bogus config parameter: %s"), text);
656 }
657
658 ret = config_parse_pair(pair[0]->buf, value, &kvi, fn, data);
659 strbuf_list_free(pair);
660 return ret;
661 }
662
663 static int parse_config_env_list(char *env, struct key_value_info *kvi,
664 config_fn_t fn, void *data)
665 {
666 char *cur = env;
667 while (cur && *cur) {
668 const char *key = sq_dequote_step(cur, &cur);
669 if (!key)
670 return error(_("bogus format in %s"),
671 CONFIG_DATA_ENVIRONMENT);
672
673 if (!cur || isspace(*cur)) {
674 /* old-style 'key=value' */
675 if (git_config_parse_parameter(key, fn, data) < 0)
676 return -1;
677 }
678 else if (*cur == '=') {
679 /* new-style 'key'='value' */
680 const char *value;
681
682 cur++;
683 if (*cur == '\'') {
684 /* quoted value */
685 value = sq_dequote_step(cur, &cur);
686 if (!value || (cur && !isspace(*cur))) {
687 return error(_("bogus format in %s"),
688 CONFIG_DATA_ENVIRONMENT);
689 }
690 } else if (!*cur || isspace(*cur)) {
691 /* implicit bool: 'key'= */
692 value = NULL;
693 } else {
694 return error(_("bogus format in %s"),
695 CONFIG_DATA_ENVIRONMENT);
696 }
697
698 if (config_parse_pair(key, value, kvi, fn, data) < 0)
699 return -1;
700 }
701 else {
702 /* unknown format */
703 return error(_("bogus format in %s"),
704 CONFIG_DATA_ENVIRONMENT);
705 }
706
707 if (cur) {
708 while (isspace(*cur))
709 cur++;
710 }
711 }
712 return 0;
713 }
714
715 int git_config_from_parameters(config_fn_t fn, void *data)
716 {
717 const char *env;
718 struct strbuf envvar = STRBUF_INIT;
719 struct strvec to_free = STRVEC_INIT;
720 int ret = 0;
721 char *envw = NULL;
722 struct key_value_info kvi = KVI_INIT;
723
724 kvi_from_param(&kvi);
725 env = getenv(CONFIG_COUNT_ENVIRONMENT);
726 if (env) {
727 unsigned long count;
728 char *endp;
729 int i;
730
731 count = strtoul(env, &endp, 10);
732 if (*endp) {
733 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
734 goto out;
735 }
736 if (count > INT_MAX) {
737 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
738 goto out;
739 }
740
741 for (i = 0; i < count; i++) {
742 const char *key, *value;
743
744 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
745 key = getenv_safe(&to_free, envvar.buf);
746 if (!key) {
747 ret = error(_("missing config key %s"), envvar.buf);
748 goto out;
749 }
750 strbuf_reset(&envvar);
751
752 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
753 value = getenv_safe(&to_free, envvar.buf);
754 if (!value) {
755 ret = error(_("missing config value %s"), envvar.buf);
756 goto out;
757 }
758 strbuf_reset(&envvar);
759
760 if (config_parse_pair(key, value, &kvi, fn, data) < 0) {
761 ret = -1;
762 goto out;
763 }
764 }
765 }
766
767 env = getenv(CONFIG_DATA_ENVIRONMENT);
768 if (env) {
769 /* sq_dequote will write over it */
770 envw = xstrdup(env);
771 if (parse_config_env_list(envw, &kvi, fn, data) < 0) {
772 ret = -1;
773 goto out;
774 }
775 }
776
777 out:
778 strbuf_release(&envvar);
779 strvec_clear(&to_free);
780 free(envw);
781 return ret;
782 }
783
784 static int get_next_char(struct config_source *cs)
785 {
786 int c = cs->do_fgetc(cs);
787
788 if (c == '\r') {
789 /* DOS like systems */
790 c = cs->do_fgetc(cs);
791 if (c != '\n') {
792 if (c != EOF)
793 cs->do_ungetc(c, cs);
794 c = '\r';
795 }
796 }
797
798 if (c != EOF && ++cs->total_len > INT_MAX) {
799 /*
800 * This is an absurdly long config file; refuse to parse
801 * further in order to protect downstream code from integer
802 * overflows. Note that we can't return an error specifically,
803 * but we can mark EOF and put trash in the return value,
804 * which will trigger a parse error.
805 */
806 cs->eof = 1;
807 return 0;
808 }
809
810 if (c == '\n')
811 cs->linenr++;
812 if (c == EOF) {
813 cs->eof = 1;
814 cs->linenr++;
815 c = '\n';
816 }
817 return c;
818 }
819
820 static char *parse_value(struct config_source *cs)
821 {
822 int quote = 0, comment = 0, space = 0;
823
824 strbuf_reset(&cs->value);
825 for (;;) {
826 int c = get_next_char(cs);
827 if (c == '\n') {
828 if (quote) {
829 cs->linenr--;
830 return NULL;
831 }
832 return cs->value.buf;
833 }
834 if (comment)
835 continue;
836 if (isspace(c) && !quote) {
837 if (cs->value.len)
838 space++;
839 continue;
840 }
841 if (!quote) {
842 if (c == ';' || c == '#') {
843 comment = 1;
844 continue;
845 }
846 }
847 for (; space; space--)
848 strbuf_addch(&cs->value, ' ');
849 if (c == '\\') {
850 c = get_next_char(cs);
851 switch (c) {
852 case '\n':
853 continue;
854 case 't':
855 c = '\t';
856 break;
857 case 'b':
858 c = '\b';
859 break;
860 case 'n':
861 c = '\n';
862 break;
863 /* Some characters escape as themselves */
864 case '\\': case '"':
865 break;
866 /* Reject unknown escape sequences */
867 default:
868 return NULL;
869 }
870 strbuf_addch(&cs->value, c);
871 continue;
872 }
873 if (c == '"') {
874 quote = 1-quote;
875 continue;
876 }
877 strbuf_addch(&cs->value, c);
878 }
879 }
880
881 static int get_value(struct config_source *cs, struct key_value_info *kvi,
882 config_fn_t fn, void *data, struct strbuf *name)
883 {
884 int c;
885 char *value;
886 int ret;
887 struct config_context ctx = {
888 .kvi = kvi,
889 };
890
891 /* Get the full name */
892 for (;;) {
893 c = get_next_char(cs);
894 if (cs->eof)
895 break;
896 if (!iskeychar(c))
897 break;
898 strbuf_addch(name, tolower(c));
899 }
900
901 while (c == ' ' || c == '\t')
902 c = get_next_char(cs);
903
904 value = NULL;
905 if (c != '\n') {
906 if (c != '=')
907 return -1;
908 value = parse_value(cs);
909 if (!value)
910 return -1;
911 }
912 /*
913 * We already consumed the \n, but we need linenr to point to
914 * the line we just parsed during the call to fn to get
915 * accurate line number in error messages.
916 */
917 cs->linenr--;
918 kvi->linenr = cs->linenr;
919 ret = fn(name->buf, value, &ctx, data);
920 if (ret >= 0)
921 cs->linenr++;
922 return ret;
923 }
924
925 static int get_extended_base_var(struct config_source *cs, struct strbuf *name,
926 int c)
927 {
928 cs->subsection_case_sensitive = 0;
929 do {
930 if (c == '\n')
931 goto error_incomplete_line;
932 c = get_next_char(cs);
933 } while (isspace(c));
934
935 /* We require the format to be '[base "extension"]' */
936 if (c != '"')
937 return -1;
938 strbuf_addch(name, '.');
939
940 for (;;) {
941 int c = get_next_char(cs);
942 if (c == '\n')
943 goto error_incomplete_line;
944 if (c == '"')
945 break;
946 if (c == '\\') {
947 c = get_next_char(cs);
948 if (c == '\n')
949 goto error_incomplete_line;
950 }
951 strbuf_addch(name, c);
952 }
953
954 /* Final ']' */
955 if (get_next_char(cs) != ']')
956 return -1;
957 return 0;
958 error_incomplete_line:
959 cs->linenr--;
960 return -1;
961 }
962
963 static int get_base_var(struct config_source *cs, struct strbuf *name)
964 {
965 cs->subsection_case_sensitive = 1;
966 for (;;) {
967 int c = get_next_char(cs);
968 if (cs->eof)
969 return -1;
970 if (c == ']')
971 return 0;
972 if (isspace(c))
973 return get_extended_base_var(cs, name, c);
974 if (!iskeychar(c) && c != '.')
975 return -1;
976 strbuf_addch(name, tolower(c));
977 }
978 }
979
980 struct parse_event_data {
981 enum config_event_t previous_type;
982 size_t previous_offset;
983 const struct config_options *opts;
984 };
985
986 static int do_event(struct config_source *cs, enum config_event_t type,
987 struct parse_event_data *data)
988 {
989 size_t offset;
990
991 if (!data->opts || !data->opts->event_fn)
992 return 0;
993
994 if (type == CONFIG_EVENT_WHITESPACE &&
995 data->previous_type == type)
996 return 0;
997
998 offset = cs->do_ftell(cs);
999 /*
1000 * At EOF, the parser always "inserts" an extra '\n', therefore
1001 * the end offset of the event is the current file position, otherwise
1002 * we will already have advanced to the next event.
1003 */
1004 if (type != CONFIG_EVENT_EOF)
1005 offset--;
1006
1007 if (data->previous_type != CONFIG_EVENT_EOF &&
1008 data->opts->event_fn(data->previous_type, data->previous_offset,
1009 offset, cs, data->opts->event_fn_data) < 0)
1010 return -1;
1011
1012 data->previous_type = type;
1013 data->previous_offset = offset;
1014
1015 return 0;
1016 }
1017
1018 static void kvi_from_source(struct config_source *cs,
1019 enum config_scope scope,
1020 struct key_value_info *out)
1021 {
1022 out->filename = strintern(cs->name);
1023 out->origin_type = cs->origin_type;
1024 out->linenr = cs->linenr;
1025 out->scope = scope;
1026 out->path = cs->path;
1027 }
1028
1029 static int git_parse_source(struct config_source *cs, config_fn_t fn,
1030 struct key_value_info *kvi, void *data,
1031 const struct config_options *opts)
1032 {
1033 int comment = 0;
1034 size_t baselen = 0;
1035 struct strbuf *var = &cs->var;
1036 int error_return = 0;
1037 char *error_msg = NULL;
1038
1039 /* U+FEFF Byte Order Mark in UTF8 */
1040 const char *bomptr = utf8_bom;
1041
1042 /* For the parser event callback */
1043 struct parse_event_data event_data = {
1044 CONFIG_EVENT_EOF, 0, opts
1045 };
1046
1047 for (;;) {
1048 int c;
1049
1050 c = get_next_char(cs);
1051 if (bomptr && *bomptr) {
1052 /* We are at the file beginning; skip UTF8-encoded BOM
1053 * if present. Sane editors won't put this in on their
1054 * own, but e.g. Windows Notepad will do it happily. */
1055 if (c == (*bomptr & 0377)) {
1056 bomptr++;
1057 continue;
1058 } else {
1059 /* Do not tolerate partial BOM. */
1060 if (bomptr != utf8_bom)
1061 break;
1062 /* No BOM at file beginning. Cool. */
1063 bomptr = NULL;
1064 }
1065 }
1066 if (c == '\n') {
1067 if (cs->eof) {
1068 if (do_event(cs, CONFIG_EVENT_EOF, &event_data) < 0)
1069 return -1;
1070 return 0;
1071 }
1072 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1073 return -1;
1074 comment = 0;
1075 continue;
1076 }
1077 if (comment)
1078 continue;
1079 if (isspace(c)) {
1080 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1081 return -1;
1082 continue;
1083 }
1084 if (c == '#' || c == ';') {
1085 if (do_event(cs, CONFIG_EVENT_COMMENT, &event_data) < 0)
1086 return -1;
1087 comment = 1;
1088 continue;
1089 }
1090 if (c == '[') {
1091 if (do_event(cs, CONFIG_EVENT_SECTION, &event_data) < 0)
1092 return -1;
1093
1094 /* Reset prior to determining a new stem */
1095 strbuf_reset(var);
1096 if (get_base_var(cs, var) < 0 || var->len < 1)
1097 break;
1098 strbuf_addch(var, '.');
1099 baselen = var->len;
1100 continue;
1101 }
1102 if (!isalpha(c))
1103 break;
1104
1105 if (do_event(cs, CONFIG_EVENT_ENTRY, &event_data) < 0)
1106 return -1;
1107
1108 /*
1109 * Truncate the var name back to the section header
1110 * stem prior to grabbing the suffix part of the name
1111 * and the value.
1112 */
1113 strbuf_setlen(var, baselen);
1114 strbuf_addch(var, tolower(c));
1115 if (get_value(cs, kvi, fn, data, var) < 0)
1116 break;
1117 }
1118
1119 if (do_event(cs, CONFIG_EVENT_ERROR, &event_data) < 0)
1120 return -1;
1121
1122 switch (cs->origin_type) {
1123 case CONFIG_ORIGIN_BLOB:
1124 error_msg = xstrfmt(_("bad config line %d in blob %s"),
1125 cs->linenr, cs->name);
1126 break;
1127 case CONFIG_ORIGIN_FILE:
1128 error_msg = xstrfmt(_("bad config line %d in file %s"),
1129 cs->linenr, cs->name);
1130 break;
1131 case CONFIG_ORIGIN_STDIN:
1132 error_msg = xstrfmt(_("bad config line %d in standard input"),
1133 cs->linenr);
1134 break;
1135 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1136 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1137 cs->linenr, cs->name);
1138 break;
1139 case CONFIG_ORIGIN_CMDLINE:
1140 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1141 cs->linenr, cs->name);
1142 break;
1143 default:
1144 error_msg = xstrfmt(_("bad config line %d in %s"),
1145 cs->linenr, cs->name);
1146 }
1147
1148 switch (opts && opts->error_action ?
1149 opts->error_action :
1150 cs->default_error_action) {
1151 case CONFIG_ERROR_DIE:
1152 die("%s", error_msg);
1153 break;
1154 case CONFIG_ERROR_ERROR:
1155 error_return = error("%s", error_msg);
1156 break;
1157 case CONFIG_ERROR_SILENT:
1158 error_return = -1;
1159 break;
1160 case CONFIG_ERROR_UNSET:
1161 BUG("config error action unset");
1162 }
1163
1164 free(error_msg);
1165 return error_return;
1166 }
1167
1168 static uintmax_t get_unit_factor(const char *end)
1169 {
1170 if (!*end)
1171 return 1;
1172 else if (!strcasecmp(end, "k"))
1173 return 1024;
1174 else if (!strcasecmp(end, "m"))
1175 return 1024 * 1024;
1176 else if (!strcasecmp(end, "g"))
1177 return 1024 * 1024 * 1024;
1178 return 0;
1179 }
1180
1181 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
1182 {
1183 if (value && *value) {
1184 char *end;
1185 intmax_t val;
1186 intmax_t factor;
1187
1188 if (max < 0)
1189 BUG("max must be a positive integer");
1190
1191 errno = 0;
1192 val = strtoimax(value, &end, 0);
1193 if (errno == ERANGE)
1194 return 0;
1195 if (end == value) {
1196 errno = EINVAL;
1197 return 0;
1198 }
1199 factor = get_unit_factor(end);
1200 if (!factor) {
1201 errno = EINVAL;
1202 return 0;
1203 }
1204 if ((val < 0 && -max / factor > val) ||
1205 (val > 0 && max / factor < val)) {
1206 errno = ERANGE;
1207 return 0;
1208 }
1209 val *= factor;
1210 *ret = val;
1211 return 1;
1212 }
1213 errno = EINVAL;
1214 return 0;
1215 }
1216
1217 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
1218 {
1219 if (value && *value) {
1220 char *end;
1221 uintmax_t val;
1222 uintmax_t factor;
1223
1224 /* negative values would be accepted by strtoumax */
1225 if (strchr(value, '-')) {
1226 errno = EINVAL;
1227 return 0;
1228 }
1229 errno = 0;
1230 val = strtoumax(value, &end, 0);
1231 if (errno == ERANGE)
1232 return 0;
1233 if (end == value) {
1234 errno = EINVAL;
1235 return 0;
1236 }
1237 factor = get_unit_factor(end);
1238 if (!factor) {
1239 errno = EINVAL;
1240 return 0;
1241 }
1242 if (unsigned_mult_overflows(factor, val) ||
1243 factor * val > max) {
1244 errno = ERANGE;
1245 return 0;
1246 }
1247 val *= factor;
1248 *ret = val;
1249 return 1;
1250 }
1251 errno = EINVAL;
1252 return 0;
1253 }
1254
1255 int git_parse_int(const char *value, int *ret)
1256 {
1257 intmax_t tmp;
1258 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
1259 return 0;
1260 *ret = tmp;
1261 return 1;
1262 }
1263
1264 static int git_parse_int64(const char *value, int64_t *ret)
1265 {
1266 intmax_t tmp;
1267 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
1268 return 0;
1269 *ret = tmp;
1270 return 1;
1271 }
1272
1273 int git_parse_ulong(const char *value, unsigned long *ret)
1274 {
1275 uintmax_t tmp;
1276 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
1277 return 0;
1278 *ret = tmp;
1279 return 1;
1280 }
1281
1282 int git_parse_ssize_t(const char *value, ssize_t *ret)
1283 {
1284 intmax_t tmp;
1285 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
1286 return 0;
1287 *ret = tmp;
1288 return 1;
1289 }
1290
1291 NORETURN
1292 static void die_bad_number(const char *name, const char *value,
1293 const struct key_value_info *kvi)
1294 {
1295 const char *error_type = (errno == ERANGE) ?
1296 N_("out of range") : N_("invalid unit");
1297 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1298
1299 if (!kvi)
1300 BUG("kvi should not be NULL");
1301
1302 if (!value)
1303 value = "";
1304
1305 if (!kvi->filename)
1306 die(_(bad_numeric), value, name, _(error_type));
1307
1308 switch (kvi->origin_type) {
1309 case CONFIG_ORIGIN_BLOB:
1310 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1311 value, name, kvi->filename, _(error_type));
1312 case CONFIG_ORIGIN_FILE:
1313 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1314 value, name, kvi->filename, _(error_type));
1315 case CONFIG_ORIGIN_STDIN:
1316 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1317 value, name, _(error_type));
1318 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1319 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1320 value, name, kvi->filename, _(error_type));
1321 case CONFIG_ORIGIN_CMDLINE:
1322 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1323 value, name, kvi->filename, _(error_type));
1324 default:
1325 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1326 value, name, kvi->filename, _(error_type));
1327 }
1328 }
1329
1330 int git_config_int(const char *name, const char *value,
1331 const struct key_value_info *kvi)
1332 {
1333 int ret;
1334 if (!git_parse_int(value, &ret))
1335 die_bad_number(name, value, kvi);
1336 return ret;
1337 }
1338
1339 int64_t git_config_int64(const char *name, const char *value,
1340 const struct key_value_info *kvi)
1341 {
1342 int64_t ret;
1343 if (!git_parse_int64(value, &ret))
1344 die_bad_number(name, value, kvi);
1345 return ret;
1346 }
1347
1348 unsigned long git_config_ulong(const char *name, const char *value,
1349 const struct key_value_info *kvi)
1350 {
1351 unsigned long ret;
1352 if (!git_parse_ulong(value, &ret))
1353 die_bad_number(name, value, kvi);
1354 return ret;
1355 }
1356
1357 ssize_t git_config_ssize_t(const char *name, const char *value,
1358 const struct key_value_info *kvi)
1359 {
1360 ssize_t ret;
1361 if (!git_parse_ssize_t(value, &ret))
1362 die_bad_number(name, value, kvi);
1363 return ret;
1364 }
1365
1366 static int git_parse_maybe_bool_text(const char *value)
1367 {
1368 if (!value)
1369 return 1;
1370 if (!*value)
1371 return 0;
1372 if (!strcasecmp(value, "true")
1373 || !strcasecmp(value, "yes")
1374 || !strcasecmp(value, "on"))
1375 return 1;
1376 if (!strcasecmp(value, "false")
1377 || !strcasecmp(value, "no")
1378 || !strcasecmp(value, "off"))
1379 return 0;
1380 return -1;
1381 }
1382
1383 static const struct fsync_component_name {
1384 const char *name;
1385 enum fsync_component component_bits;
1386 } fsync_component_names[] = {
1387 { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT },
1388 { "pack", FSYNC_COMPONENT_PACK },
1389 { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
1390 { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
1391 { "index", FSYNC_COMPONENT_INDEX },
1392 { "objects", FSYNC_COMPONENTS_OBJECTS },
1393 { "reference", FSYNC_COMPONENT_REFERENCE },
1394 { "derived-metadata", FSYNC_COMPONENTS_DERIVED_METADATA },
1395 { "committed", FSYNC_COMPONENTS_COMMITTED },
1396 { "added", FSYNC_COMPONENTS_ADDED },
1397 { "all", FSYNC_COMPONENTS_ALL },
1398 };
1399
1400 static enum fsync_component parse_fsync_components(const char *var, const char *string)
1401 {
1402 enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
1403 enum fsync_component positive = 0, negative = 0;
1404
1405 while (string) {
1406 int i;
1407 size_t len;
1408 const char *ep;
1409 int negated = 0;
1410 int found = 0;
1411
1412 string = string + strspn(string, ", \t\n\r");
1413 ep = strchrnul(string, ',');
1414 len = ep - string;
1415 if (!strcmp(string, "none")) {
1416 current = FSYNC_COMPONENT_NONE;
1417 goto next_name;
1418 }
1419
1420 if (*string == '-') {
1421 negated = 1;
1422 string++;
1423 len--;
1424 if (!len)
1425 warning(_("invalid value for variable %s"), var);
1426 }
1427
1428 if (!len)
1429 break;
1430
1431 for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) {
1432 const struct fsync_component_name *n = &fsync_component_names[i];
1433
1434 if (strncmp(n->name, string, len))
1435 continue;
1436
1437 found = 1;
1438 if (negated)
1439 negative |= n->component_bits;
1440 else
1441 positive |= n->component_bits;
1442 }
1443
1444 if (!found) {
1445 char *component = xstrndup(string, len);
1446 warning(_("ignoring unknown core.fsync component '%s'"), component);
1447 free(component);
1448 }
1449
1450 next_name:
1451 string = ep;
1452 }
1453
1454 return (current & ~negative) | positive;
1455 }
1456
1457 int git_parse_maybe_bool(const char *value)
1458 {
1459 int v = git_parse_maybe_bool_text(value);
1460 if (0 <= v)
1461 return v;
1462 if (git_parse_int(value, &v))
1463 return !!v;
1464 return -1;
1465 }
1466
1467 int git_config_bool_or_int(const char *name, const char *value,
1468 const struct key_value_info *kvi, int *is_bool)
1469 {
1470 int v = git_parse_maybe_bool_text(value);
1471 if (0 <= v) {
1472 *is_bool = 1;
1473 return v;
1474 }
1475 *is_bool = 0;
1476 return git_config_int(name, value, kvi);
1477 }
1478
1479 int git_config_bool(const char *name, const char *value)
1480 {
1481 int v = git_parse_maybe_bool(value);
1482 if (v < 0)
1483 die(_("bad boolean config value '%s' for '%s'"), value, name);
1484 return v;
1485 }
1486
1487 int git_config_string(const char **dest, const char *var, const char *value)
1488 {
1489 if (!value)
1490 return config_error_nonbool(var);
1491 *dest = xstrdup(value);
1492 return 0;
1493 }
1494
1495 int git_config_pathname(const char **dest, const char *var, const char *value)
1496 {
1497 if (!value)
1498 return config_error_nonbool(var);
1499 *dest = interpolate_path(value, 0);
1500 if (!*dest)
1501 die(_("failed to expand user dir in: '%s'"), value);
1502 return 0;
1503 }
1504
1505 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1506 {
1507 if (!value)
1508 return config_error_nonbool(var);
1509 if (parse_expiry_date(value, timestamp))
1510 return error(_("'%s' for '%s' is not a valid timestamp"),
1511 value, var);
1512 return 0;
1513 }
1514
1515 int git_config_color(char *dest, const char *var, const char *value)
1516 {
1517 if (!value)
1518 return config_error_nonbool(var);
1519 if (color_parse(value, dest) < 0)
1520 return -1;
1521 return 0;
1522 }
1523
1524 static int git_default_core_config(const char *var, const char *value,
1525 const struct config_context *ctx, void *cb)
1526 {
1527 /* This needs a better name */
1528 if (!strcmp(var, "core.filemode")) {
1529 trust_executable_bit = git_config_bool(var, value);
1530 return 0;
1531 }
1532 if (!strcmp(var, "core.trustctime")) {
1533 trust_ctime = git_config_bool(var, value);
1534 return 0;
1535 }
1536 if (!strcmp(var, "core.checkstat")) {
1537 if (!strcasecmp(value, "default"))
1538 check_stat = 1;
1539 else if (!strcasecmp(value, "minimal"))
1540 check_stat = 0;
1541 }
1542
1543 if (!strcmp(var, "core.quotepath")) {
1544 quote_path_fully = git_config_bool(var, value);
1545 return 0;
1546 }
1547
1548 if (!strcmp(var, "core.symlinks")) {
1549 has_symlinks = git_config_bool(var, value);
1550 return 0;
1551 }
1552
1553 if (!strcmp(var, "core.ignorecase")) {
1554 ignore_case = git_config_bool(var, value);
1555 return 0;
1556 }
1557
1558 if (!strcmp(var, "core.attributesfile"))
1559 return git_config_pathname(&git_attributes_file, var, value);
1560
1561 if (!strcmp(var, "core.hookspath"))
1562 return git_config_pathname(&git_hooks_path, var, value);
1563
1564 if (!strcmp(var, "core.bare")) {
1565 is_bare_repository_cfg = git_config_bool(var, value);
1566 return 0;
1567 }
1568
1569 if (!strcmp(var, "core.ignorestat")) {
1570 assume_unchanged = git_config_bool(var, value);
1571 return 0;
1572 }
1573
1574 if (!strcmp(var, "core.prefersymlinkrefs")) {
1575 prefer_symlink_refs = git_config_bool(var, value);
1576 return 0;
1577 }
1578
1579 if (!strcmp(var, "core.logallrefupdates")) {
1580 if (value && !strcasecmp(value, "always"))
1581 log_all_ref_updates = LOG_REFS_ALWAYS;
1582 else if (git_config_bool(var, value))
1583 log_all_ref_updates = LOG_REFS_NORMAL;
1584 else
1585 log_all_ref_updates = LOG_REFS_NONE;
1586 return 0;
1587 }
1588
1589 if (!strcmp(var, "core.warnambiguousrefs")) {
1590 warn_ambiguous_refs = git_config_bool(var, value);
1591 return 0;
1592 }
1593
1594 if (!strcmp(var, "core.abbrev")) {
1595 if (!value)
1596 return config_error_nonbool(var);
1597 if (!strcasecmp(value, "auto"))
1598 default_abbrev = -1;
1599 else if (!git_parse_maybe_bool_text(value))
1600 default_abbrev = the_hash_algo->hexsz;
1601 else {
1602 int abbrev = git_config_int(var, value, ctx->kvi);
1603 if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
1604 return error(_("abbrev length out of range: %d"), abbrev);
1605 default_abbrev = abbrev;
1606 }
1607 return 0;
1608 }
1609
1610 if (!strcmp(var, "core.disambiguate"))
1611 return set_disambiguate_hint_config(var, value);
1612
1613 if (!strcmp(var, "core.loosecompression")) {
1614 int level = git_config_int(var, value, ctx->kvi);
1615 if (level == -1)
1616 level = Z_DEFAULT_COMPRESSION;
1617 else if (level < 0 || level > Z_BEST_COMPRESSION)
1618 die(_("bad zlib compression level %d"), level);
1619 zlib_compression_level = level;
1620 zlib_compression_seen = 1;
1621 return 0;
1622 }
1623
1624 if (!strcmp(var, "core.compression")) {
1625 int level = git_config_int(var, value, ctx->kvi);
1626 if (level == -1)
1627 level = Z_DEFAULT_COMPRESSION;
1628 else if (level < 0 || level > Z_BEST_COMPRESSION)
1629 die(_("bad zlib compression level %d"), level);
1630 if (!zlib_compression_seen)
1631 zlib_compression_level = level;
1632 if (!pack_compression_seen)
1633 pack_compression_level = level;
1634 return 0;
1635 }
1636
1637 if (!strcmp(var, "core.packedgitwindowsize")) {
1638 int pgsz_x2 = getpagesize() * 2;
1639 packed_git_window_size = git_config_ulong(var, value, ctx->kvi);
1640
1641 /* This value must be multiple of (pagesize * 2) */
1642 packed_git_window_size /= pgsz_x2;
1643 if (packed_git_window_size < 1)
1644 packed_git_window_size = 1;
1645 packed_git_window_size *= pgsz_x2;
1646 return 0;
1647 }
1648
1649 if (!strcmp(var, "core.bigfilethreshold")) {
1650 big_file_threshold = git_config_ulong(var, value, ctx->kvi);
1651 return 0;
1652 }
1653
1654 if (!strcmp(var, "core.packedgitlimit")) {
1655 packed_git_limit = git_config_ulong(var, value, ctx->kvi);
1656 return 0;
1657 }
1658
1659 if (!strcmp(var, "core.deltabasecachelimit")) {
1660 delta_base_cache_limit = git_config_ulong(var, value, ctx->kvi);
1661 return 0;
1662 }
1663
1664 if (!strcmp(var, "core.autocrlf")) {
1665 if (value && !strcasecmp(value, "input")) {
1666 auto_crlf = AUTO_CRLF_INPUT;
1667 return 0;
1668 }
1669 auto_crlf = git_config_bool(var, value);
1670 return 0;
1671 }
1672
1673 if (!strcmp(var, "core.safecrlf")) {
1674 int eol_rndtrp_die;
1675 if (value && !strcasecmp(value, "warn")) {
1676 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1677 return 0;
1678 }
1679 eol_rndtrp_die = git_config_bool(var, value);
1680 global_conv_flags_eol = eol_rndtrp_die ?
1681 CONV_EOL_RNDTRP_DIE : 0;
1682 return 0;
1683 }
1684
1685 if (!strcmp(var, "core.eol")) {
1686 if (value && !strcasecmp(value, "lf"))
1687 core_eol = EOL_LF;
1688 else if (value && !strcasecmp(value, "crlf"))
1689 core_eol = EOL_CRLF;
1690 else if (value && !strcasecmp(value, "native"))
1691 core_eol = EOL_NATIVE;
1692 else
1693 core_eol = EOL_UNSET;
1694 return 0;
1695 }
1696
1697 if (!strcmp(var, "core.checkroundtripencoding")) {
1698 check_roundtrip_encoding = xstrdup(value);
1699 return 0;
1700 }
1701
1702 if (!strcmp(var, "core.notesref")) {
1703 notes_ref_name = xstrdup(value);
1704 return 0;
1705 }
1706
1707 if (!strcmp(var, "core.editor"))
1708 return git_config_string(&editor_program, var, value);
1709
1710 if (!strcmp(var, "core.commentchar")) {
1711 if (!value)
1712 return config_error_nonbool(var);
1713 else if (!strcasecmp(value, "auto"))
1714 auto_comment_line_char = 1;
1715 else if (value[0] && !value[1]) {
1716 comment_line_char = value[0];
1717 auto_comment_line_char = 0;
1718 } else
1719 return error(_("core.commentChar should only be one ASCII character"));
1720 return 0;
1721 }
1722
1723 if (!strcmp(var, "core.askpass"))
1724 return git_config_string(&askpass_program, var, value);
1725
1726 if (!strcmp(var, "core.excludesfile"))
1727 return git_config_pathname(&excludes_file, var, value);
1728
1729 if (!strcmp(var, "core.whitespace")) {
1730 if (!value)
1731 return config_error_nonbool(var);
1732 whitespace_rule_cfg = parse_whitespace_rule(value);
1733 return 0;
1734 }
1735
1736 if (!strcmp(var, "core.fsync")) {
1737 if (!value)
1738 return config_error_nonbool(var);
1739 fsync_components = parse_fsync_components(var, value);
1740 return 0;
1741 }
1742
1743 if (!strcmp(var, "core.fsyncmethod")) {
1744 if (!value)
1745 return config_error_nonbool(var);
1746 if (!strcmp(value, "fsync"))
1747 fsync_method = FSYNC_METHOD_FSYNC;
1748 else if (!strcmp(value, "writeout-only"))
1749 fsync_method = FSYNC_METHOD_WRITEOUT_ONLY;
1750 else if (!strcmp(value, "batch"))
1751 fsync_method = FSYNC_METHOD_BATCH;
1752 else
1753 warning(_("ignoring unknown core.fsyncMethod value '%s'"), value);
1754
1755 }
1756
1757 if (!strcmp(var, "core.fsyncobjectfiles")) {
1758 if (fsync_object_files < 0)
1759 warning(_("core.fsyncObjectFiles is deprecated; use core.fsync instead"));
1760 fsync_object_files = git_config_bool(var, value);
1761 return 0;
1762 }
1763
1764 if (!strcmp(var, "core.preloadindex")) {
1765 core_preload_index = git_config_bool(var, value);
1766 return 0;
1767 }
1768
1769 if (!strcmp(var, "core.createobject")) {
1770 if (!strcmp(value, "rename"))
1771 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1772 else if (!strcmp(value, "link"))
1773 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1774 else
1775 die(_("invalid mode for object creation: %s"), value);
1776 return 0;
1777 }
1778
1779 if (!strcmp(var, "core.sparsecheckout")) {
1780 core_apply_sparse_checkout = git_config_bool(var, value);
1781 return 0;
1782 }
1783
1784 if (!strcmp(var, "core.sparsecheckoutcone")) {
1785 core_sparse_checkout_cone = git_config_bool(var, value);
1786 return 0;
1787 }
1788
1789 if (!strcmp(var, "core.precomposeunicode")) {
1790 precomposed_unicode = git_config_bool(var, value);
1791 return 0;
1792 }
1793
1794 if (!strcmp(var, "core.protecthfs")) {
1795 protect_hfs = git_config_bool(var, value);
1796 return 0;
1797 }
1798
1799 if (!strcmp(var, "core.protectntfs")) {
1800 protect_ntfs = git_config_bool(var, value);
1801 return 0;
1802 }
1803
1804 /* Add other config variables here and to Documentation/config.txt. */
1805 return platform_core_config(var, value, ctx, cb);
1806 }
1807
1808 static int git_default_sparse_config(const char *var, const char *value)
1809 {
1810 if (!strcmp(var, "sparse.expectfilesoutsideofpatterns")) {
1811 sparse_expect_files_outside_of_patterns = git_config_bool(var, value);
1812 return 0;
1813 }
1814
1815 /* Add other config variables here and to Documentation/config/sparse.txt. */
1816 return 0;
1817 }
1818
1819 static int git_default_i18n_config(const char *var, const char *value)
1820 {
1821 if (!strcmp(var, "i18n.commitencoding"))
1822 return git_config_string(&git_commit_encoding, var, value);
1823
1824 if (!strcmp(var, "i18n.logoutputencoding"))
1825 return git_config_string(&git_log_output_encoding, var, value);
1826
1827 /* Add other config variables here and to Documentation/config.txt. */
1828 return 0;
1829 }
1830
1831 static int git_default_branch_config(const char *var, const char *value)
1832 {
1833 if (!strcmp(var, "branch.autosetupmerge")) {
1834 if (value && !strcmp(value, "always")) {
1835 git_branch_track = BRANCH_TRACK_ALWAYS;
1836 return 0;
1837 } else if (value && !strcmp(value, "inherit")) {
1838 git_branch_track = BRANCH_TRACK_INHERIT;
1839 return 0;
1840 } else if (value && !strcmp(value, "simple")) {
1841 git_branch_track = BRANCH_TRACK_SIMPLE;
1842 return 0;
1843 }
1844 git_branch_track = git_config_bool(var, value);
1845 return 0;
1846 }
1847 if (!strcmp(var, "branch.autosetuprebase")) {
1848 if (!value)
1849 return config_error_nonbool(var);
1850 else if (!strcmp(value, "never"))
1851 autorebase = AUTOREBASE_NEVER;
1852 else if (!strcmp(value, "local"))
1853 autorebase = AUTOREBASE_LOCAL;
1854 else if (!strcmp(value, "remote"))
1855 autorebase = AUTOREBASE_REMOTE;
1856 else if (!strcmp(value, "always"))
1857 autorebase = AUTOREBASE_ALWAYS;
1858 else
1859 return error(_("malformed value for %s"), var);
1860 return 0;
1861 }
1862
1863 /* Add other config variables here and to Documentation/config.txt. */
1864 return 0;
1865 }
1866
1867 static int git_default_push_config(const char *var, const char *value)
1868 {
1869 if (!strcmp(var, "push.default")) {
1870 if (!value)
1871 return config_error_nonbool(var);
1872 else if (!strcmp(value, "nothing"))
1873 push_default = PUSH_DEFAULT_NOTHING;
1874 else if (!strcmp(value, "matching"))
1875 push_default = PUSH_DEFAULT_MATCHING;
1876 else if (!strcmp(value, "simple"))
1877 push_default = PUSH_DEFAULT_SIMPLE;
1878 else if (!strcmp(value, "upstream"))
1879 push_default = PUSH_DEFAULT_UPSTREAM;
1880 else if (!strcmp(value, "tracking")) /* deprecated */
1881 push_default = PUSH_DEFAULT_UPSTREAM;
1882 else if (!strcmp(value, "current"))
1883 push_default = PUSH_DEFAULT_CURRENT;
1884 else {
1885 error(_("malformed value for %s: %s"), var, value);
1886 return error(_("must be one of nothing, matching, simple, "
1887 "upstream or current"));
1888 }
1889 return 0;
1890 }
1891
1892 /* Add other config variables here and to Documentation/config.txt. */
1893 return 0;
1894 }
1895
1896 static int git_default_mailmap_config(const char *var, const char *value)
1897 {
1898 if (!strcmp(var, "mailmap.file"))
1899 return git_config_pathname(&git_mailmap_file, var, value);
1900 if (!strcmp(var, "mailmap.blob"))
1901 return git_config_string(&git_mailmap_blob, var, value);
1902
1903 /* Add other config variables here and to Documentation/config.txt. */
1904 return 0;
1905 }
1906
1907 int git_default_config(const char *var, const char *value,
1908 const struct config_context *ctx, void *cb)
1909 {
1910 if (starts_with(var, "core."))
1911 return git_default_core_config(var, value, ctx, cb);
1912
1913 if (starts_with(var, "user.") ||
1914 starts_with(var, "author.") ||
1915 starts_with(var, "committer."))
1916 return git_ident_config(var, value, ctx, cb);
1917
1918 if (starts_with(var, "i18n."))
1919 return git_default_i18n_config(var, value);
1920
1921 if (starts_with(var, "branch."))
1922 return git_default_branch_config(var, value);
1923
1924 if (starts_with(var, "push."))
1925 return git_default_push_config(var, value);
1926
1927 if (starts_with(var, "mailmap."))
1928 return git_default_mailmap_config(var, value);
1929
1930 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1931 return git_default_advice_config(var, value);
1932
1933 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1934 pager_use_color = git_config_bool(var,value);
1935 return 0;
1936 }
1937
1938 if (!strcmp(var, "pack.packsizelimit")) {
1939 pack_size_limit_cfg = git_config_ulong(var, value, ctx->kvi);
1940 return 0;
1941 }
1942
1943 if (!strcmp(var, "pack.compression")) {
1944 int level = git_config_int(var, value, ctx->kvi);
1945 if (level == -1)
1946 level = Z_DEFAULT_COMPRESSION;
1947 else if (level < 0 || level > Z_BEST_COMPRESSION)
1948 die(_("bad pack compression level %d"), level);
1949 pack_compression_level = level;
1950 pack_compression_seen = 1;
1951 return 0;
1952 }
1953
1954 if (starts_with(var, "sparse."))
1955 return git_default_sparse_config(var, value);
1956
1957 /* Add other config variables here and to Documentation/config.txt. */
1958 return 0;
1959 }
1960
1961 /*
1962 * All source specific fields in the union, die_on_error, name and the callbacks
1963 * fgetc, ungetc, ftell of top need to be initialized before calling
1964 * this function.
1965 */
1966 static int do_config_from(struct config_source *top, config_fn_t fn,
1967 void *data, enum config_scope scope,
1968 const struct config_options *opts)
1969 {
1970 struct key_value_info kvi = KVI_INIT;
1971 int ret;
1972
1973 /* push config-file parsing state stack */
1974 top->linenr = 1;
1975 top->eof = 0;
1976 top->total_len = 0;
1977 strbuf_init(&top->value, 1024);
1978 strbuf_init(&top->var, 1024);
1979 kvi_from_source(top, scope, &kvi);
1980
1981 ret = git_parse_source(top, fn, &kvi, data, opts);
1982
1983 strbuf_release(&top->value);
1984 strbuf_release(&top->var);
1985
1986 return ret;
1987 }
1988
1989 static int do_config_from_file(config_fn_t fn,
1990 const enum config_origin_type origin_type,
1991 const char *name, const char *path, FILE *f,
1992 void *data, enum config_scope scope,
1993 const struct config_options *opts)
1994 {
1995 struct config_source top = CONFIG_SOURCE_INIT;
1996 int ret;
1997
1998 top.u.file = f;
1999 top.origin_type = origin_type;
2000 top.name = name;
2001 top.path = path;
2002 top.default_error_action = CONFIG_ERROR_DIE;
2003 top.do_fgetc = config_file_fgetc;
2004 top.do_ungetc = config_file_ungetc;
2005 top.do_ftell = config_file_ftell;
2006
2007 flockfile(f);
2008 ret = do_config_from(&top, fn, data, scope, opts);
2009 funlockfile(f);
2010 return ret;
2011 }
2012
2013 static int git_config_from_stdin(config_fn_t fn, void *data,
2014 enum config_scope scope)
2015 {
2016 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
2017 data, scope, NULL);
2018 }
2019
2020 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
2021 void *data, enum config_scope scope,
2022 const struct config_options *opts)
2023 {
2024 int ret = -1;
2025 FILE *f;
2026
2027 if (!filename)
2028 BUG("filename cannot be NULL");
2029 f = fopen_or_warn(filename, "r");
2030 if (f) {
2031 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
2032 filename, f, data, scope, opts);
2033 fclose(f);
2034 }
2035 return ret;
2036 }
2037
2038 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
2039 {
2040 return git_config_from_file_with_options(fn, filename, data,
2041 CONFIG_SCOPE_UNKNOWN, NULL);
2042 }
2043
2044 int git_config_from_mem(config_fn_t fn,
2045 const enum config_origin_type origin_type,
2046 const char *name, const char *buf, size_t len,
2047 void *data, enum config_scope scope,
2048 const struct config_options *opts)
2049 {
2050 struct config_source top = CONFIG_SOURCE_INIT;
2051
2052 top.u.buf.buf = buf;
2053 top.u.buf.len = len;
2054 top.u.buf.pos = 0;
2055 top.origin_type = origin_type;
2056 top.name = name;
2057 top.path = NULL;
2058 top.default_error_action = CONFIG_ERROR_ERROR;
2059 top.do_fgetc = config_buf_fgetc;
2060 top.do_ungetc = config_buf_ungetc;
2061 top.do_ftell = config_buf_ftell;
2062
2063 return do_config_from(&top, fn, data, scope, opts);
2064 }
2065
2066 int git_config_from_blob_oid(config_fn_t fn,
2067 const char *name,
2068 struct repository *repo,
2069 const struct object_id *oid,
2070 void *data,
2071 enum config_scope scope)
2072 {
2073 enum object_type type;
2074 char *buf;
2075 unsigned long size;
2076 int ret;
2077
2078 buf = repo_read_object_file(repo, oid, &type, &size);
2079 if (!buf)
2080 return error(_("unable to load config blob object '%s'"), name);
2081 if (type != OBJ_BLOB) {
2082 free(buf);
2083 return error(_("reference '%s' does not point to a blob"), name);
2084 }
2085
2086 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
2087 data, scope, NULL);
2088 free(buf);
2089
2090 return ret;
2091 }
2092
2093 static int git_config_from_blob_ref(config_fn_t fn,
2094 struct repository *repo,
2095 const char *name,
2096 void *data,
2097 enum config_scope scope)
2098 {
2099 struct object_id oid;
2100
2101 if (repo_get_oid(repo, name, &oid) < 0)
2102 return error(_("unable to resolve config blob '%s'"), name);
2103 return git_config_from_blob_oid(fn, name, repo, &oid, data, scope);
2104 }
2105
2106 char *git_system_config(void)
2107 {
2108 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
2109 if (!system_config)
2110 system_config = system_path(ETC_GITCONFIG);
2111 normalize_path_copy(system_config, system_config);
2112 return system_config;
2113 }
2114
2115 void git_global_config(char **user_out, char **xdg_out)
2116 {
2117 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
2118 char *xdg_config = NULL;
2119
2120 if (!user_config) {
2121 user_config = interpolate_path("~/.gitconfig", 0);
2122 xdg_config = xdg_config_home("config");
2123 }
2124
2125 *user_out = user_config;
2126 *xdg_out = xdg_config;
2127 }
2128
2129 /*
2130 * Parse environment variable 'k' as a boolean (in various
2131 * possible spellings); if missing, use the default value 'def'.
2132 */
2133 int git_env_bool(const char *k, int def)
2134 {
2135 const char *v = getenv(k);
2136 return v ? git_config_bool(k, v) : def;
2137 }
2138
2139 /*
2140 * Parse environment variable 'k' as ulong with possibly a unit
2141 * suffix; if missing, use the default value 'val'.
2142 */
2143 unsigned long git_env_ulong(const char *k, unsigned long val)
2144 {
2145 const char *v = getenv(k);
2146 if (v && !git_parse_ulong(v, &val))
2147 die(_("failed to parse %s"), k);
2148 return val;
2149 }
2150
2151 int git_config_system(void)
2152 {
2153 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
2154 }
2155
2156 static int do_git_config_sequence(const struct config_options *opts,
2157 const struct repository *repo,
2158 config_fn_t fn, void *data)
2159 {
2160 int ret = 0;
2161 char *system_config = git_system_config();
2162 char *xdg_config = NULL;
2163 char *user_config = NULL;
2164 char *repo_config;
2165 char *worktree_config;
2166
2167 /*
2168 * Ensure that either:
2169 * - the git_dir and commondir are both set, or
2170 * - the git_dir and commondir are both NULL
2171 */
2172 if (!opts->git_dir != !opts->commondir)
2173 BUG("only one of commondir and git_dir is non-NULL");
2174
2175 if (opts->commondir) {
2176 repo_config = mkpathdup("%s/config", opts->commondir);
2177 worktree_config = mkpathdup("%s/config.worktree", opts->git_dir);
2178 } else {
2179 repo_config = NULL;
2180 worktree_config = NULL;
2181 }
2182
2183 if (git_config_system() && system_config &&
2184 !access_or_die(system_config, R_OK,
2185 opts->system_gently ? ACCESS_EACCES_OK : 0))
2186 ret += git_config_from_file_with_options(fn, system_config,
2187 data, CONFIG_SCOPE_SYSTEM,
2188 NULL);
2189
2190 git_global_config(&user_config, &xdg_config);
2191
2192 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
2193 ret += git_config_from_file_with_options(fn, xdg_config, data,
2194 CONFIG_SCOPE_GLOBAL, NULL);
2195
2196 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
2197 ret += git_config_from_file_with_options(fn, user_config, data,
2198 CONFIG_SCOPE_GLOBAL, NULL);
2199
2200 if (!opts->ignore_repo && repo_config &&
2201 !access_or_die(repo_config, R_OK, 0))
2202 ret += git_config_from_file_with_options(fn, repo_config, data,
2203 CONFIG_SCOPE_LOCAL, NULL);
2204
2205 if (!opts->ignore_worktree && worktree_config &&
2206 repo && repo->repository_format_worktree_config &&
2207 !access_or_die(worktree_config, R_OK, 0)) {
2208 ret += git_config_from_file_with_options(fn, worktree_config, data,
2209 CONFIG_SCOPE_WORKTREE,
2210 NULL);
2211 }
2212
2213 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
2214 die(_("unable to parse command-line config"));
2215
2216 free(system_config);
2217 free(xdg_config);
2218 free(user_config);
2219 free(repo_config);
2220 free(worktree_config);
2221 return ret;
2222 }
2223
2224 int config_with_options(config_fn_t fn, void *data,
2225 struct git_config_source *config_source,
2226 struct repository *repo,
2227 const struct config_options *opts)
2228 {
2229 struct config_include_data inc = CONFIG_INCLUDE_INIT;
2230 int ret;
2231
2232 if (opts->respect_includes) {
2233 inc.fn = fn;
2234 inc.data = data;
2235 inc.opts = opts;
2236 inc.repo = repo;
2237 inc.config_source = config_source;
2238 fn = git_config_include;
2239 data = &inc;
2240 }
2241
2242 /*
2243 * If we have a specific filename, use it. Otherwise, follow the
2244 * regular lookup sequence.
2245 */
2246 if (config_source && config_source->use_stdin) {
2247 ret = git_config_from_stdin(fn, data, config_source->scope);
2248 } else if (config_source && config_source->file) {
2249 ret = git_config_from_file_with_options(fn, config_source->file,
2250 data, config_source->scope,
2251 NULL);
2252 } else if (config_source && config_source->blob) {
2253 ret = git_config_from_blob_ref(fn, repo, config_source->blob,
2254 data, config_source->scope);
2255 } else {
2256 ret = do_git_config_sequence(opts, repo, fn, data);
2257 }
2258
2259 if (inc.remote_urls) {
2260 string_list_clear(inc.remote_urls, 0);
2261 FREE_AND_NULL(inc.remote_urls);
2262 }
2263 return ret;
2264 }
2265
2266 static void configset_iter(struct config_set *set, config_fn_t fn, void *data)
2267 {
2268 int i, value_index;
2269 struct string_list *values;
2270 struct config_set_element *entry;
2271 struct configset_list *list = &set->list;
2272 struct config_context ctx = CONFIG_CONTEXT_INIT;
2273
2274 for (i = 0; i < list->nr; i++) {
2275 entry = list->items[i].e;
2276 value_index = list->items[i].value_index;
2277 values = &entry->value_list;
2278
2279 ctx.kvi = values->items[value_index].util;
2280 if (fn(entry->key, values->items[value_index].string, &ctx, data) < 0)
2281 git_die_config_linenr(entry->key,
2282 ctx.kvi->filename,
2283 ctx.kvi->linenr);
2284 }
2285 }
2286
2287 void read_early_config(config_fn_t cb, void *data)
2288 {
2289 struct config_options opts = {0};
2290 struct strbuf commondir = STRBUF_INIT;
2291 struct strbuf gitdir = STRBUF_INIT;
2292
2293 opts.respect_includes = 1;
2294
2295 if (have_git_dir()) {
2296 opts.commondir = get_git_common_dir();
2297 opts.git_dir = get_git_dir();
2298 /*
2299 * When setup_git_directory() was not yet asked to discover the
2300 * GIT_DIR, we ask discover_git_directory() to figure out whether there
2301 * is any repository config we should use (but unlike
2302 * setup_git_directory_gently(), no global state is changed, most
2303 * notably, the current working directory is still the same after the
2304 * call).
2305 */
2306 } else if (!discover_git_directory(&commondir, &gitdir)) {
2307 opts.commondir = commondir.buf;
2308 opts.git_dir = gitdir.buf;
2309 }
2310
2311 config_with_options(cb, data, NULL, NULL, &opts);
2312
2313 strbuf_release(&commondir);
2314 strbuf_release(&gitdir);
2315 }
2316
2317 /*
2318 * Read config but only enumerate system and global settings.
2319 * Omit any repo-local, worktree-local, or command-line settings.
2320 */
2321 void read_very_early_config(config_fn_t cb, void *data)
2322 {
2323 struct config_options opts = { 0 };
2324
2325 opts.respect_includes = 1;
2326 opts.ignore_repo = 1;
2327 opts.ignore_worktree = 1;
2328 opts.ignore_cmdline = 1;
2329 opts.system_gently = 1;
2330
2331 config_with_options(cb, data, NULL, NULL, &opts);
2332 }
2333
2334 RESULT_MUST_BE_USED
2335 static int configset_find_element(struct config_set *set, const char *key,
2336 struct config_set_element **dest)
2337 {
2338 struct config_set_element k;
2339 struct config_set_element *found_entry;
2340 char *normalized_key;
2341 int ret;
2342
2343 /*
2344 * `key` may come from the user, so normalize it before using it
2345 * for querying entries from the hashmap.
2346 */
2347 ret = git_config_parse_key(key, &normalized_key, NULL);
2348 if (ret)
2349 return ret;
2350
2351 hashmap_entry_init(&k.ent, strhash(normalized_key));
2352 k.key = normalized_key;
2353 found_entry = hashmap_get_entry(&set->config_hash, &k, ent, NULL);
2354 free(normalized_key);
2355 *dest = found_entry;
2356 return 0;
2357 }
2358
2359 static int configset_add_value(const struct key_value_info *kvi_p,
2360 struct config_set *set, const char *key,
2361 const char *value)
2362 {
2363 struct config_set_element *e;
2364 struct string_list_item *si;
2365 struct configset_list_item *l_item;
2366 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
2367 int ret;
2368
2369 ret = configset_find_element(set, key, &e);
2370 if (ret)
2371 return ret;
2372 /*
2373 * Since the keys are being fed by git_config*() callback mechanism, they
2374 * are already normalized. So simply add them without any further munging.
2375 */
2376 if (!e) {
2377 e = xmalloc(sizeof(*e));
2378 hashmap_entry_init(&e->ent, strhash(key));
2379 e->key = xstrdup(key);
2380 string_list_init_dup(&e->value_list);
2381 hashmap_add(&set->config_hash, &e->ent);
2382 }
2383 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
2384
2385 ALLOC_GROW(set->list.items, set->list.nr + 1, set->list.alloc);
2386 l_item = &set->list.items[set->list.nr++];
2387 l_item->e = e;
2388 l_item->value_index = e->value_list.nr - 1;
2389
2390 *kv_info = *kvi_p;
2391 si->util = kv_info;
2392
2393 return 0;
2394 }
2395
2396 static int config_set_element_cmp(const void *cmp_data UNUSED,
2397 const struct hashmap_entry *eptr,
2398 const struct hashmap_entry *entry_or_key,
2399 const void *keydata UNUSED)
2400 {
2401 const struct config_set_element *e1, *e2;
2402
2403 e1 = container_of(eptr, const struct config_set_element, ent);
2404 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2405
2406 return strcmp(e1->key, e2->key);
2407 }
2408
2409 void git_configset_init(struct config_set *set)
2410 {
2411 hashmap_init(&set->config_hash, config_set_element_cmp, NULL, 0);
2412 set->hash_initialized = 1;
2413 set->list.nr = 0;
2414 set->list.alloc = 0;
2415 set->list.items = NULL;
2416 }
2417
2418 void git_configset_clear(struct config_set *set)
2419 {
2420 struct config_set_element *entry;
2421 struct hashmap_iter iter;
2422 if (!set->hash_initialized)
2423 return;
2424
2425 hashmap_for_each_entry(&set->config_hash, &iter, entry,
2426 ent /* member name */) {
2427 free(entry->key);
2428 string_list_clear(&entry->value_list, 1);
2429 }
2430 hashmap_clear_and_free(&set->config_hash, struct config_set_element, ent);
2431 set->hash_initialized = 0;
2432 free(set->list.items);
2433 set->list.nr = 0;
2434 set->list.alloc = 0;
2435 set->list.items = NULL;
2436 }
2437
2438 static int config_set_callback(const char *key, const char *value,
2439 const struct config_context *ctx,
2440 void *cb)
2441 {
2442 struct config_set *set = cb;
2443 configset_add_value(ctx->kvi, set, key, value);
2444 return 0;
2445 }
2446
2447 int git_configset_add_file(struct config_set *set, const char *filename)
2448 {
2449 return git_config_from_file(config_set_callback, filename, set);
2450 }
2451
2452 int git_configset_get_value(struct config_set *set, const char *key,
2453 const char **value, struct key_value_info *kvi)
2454 {
2455 const struct string_list *values = NULL;
2456 int ret;
2457 struct string_list_item item;
2458 /*
2459 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2460 * queried key in the files of the configset, the value returned will be the last
2461 * value in the value list for that key.
2462 */
2463 if ((ret = git_configset_get_value_multi(set, key, &values)))
2464 return ret;
2465
2466 assert(values->nr > 0);
2467 item = values->items[values->nr - 1];
2468 *value = item.string;
2469 if (kvi)
2470 *kvi = *((struct key_value_info *)item.util);
2471 return 0;
2472 }
2473
2474 int git_configset_get_value_multi(struct config_set *set, const char *key,
2475 const struct string_list **dest)
2476 {
2477 struct config_set_element *e;
2478 int ret;
2479
2480 if ((ret = configset_find_element(set, key, &e)))
2481 return ret;
2482 else if (!e)
2483 return 1;
2484 *dest = &e->value_list;
2485
2486 return 0;
2487 }
2488
2489 static int check_multi_string(struct string_list_item *item, void *util)
2490 {
2491 return item->string ? 0 : config_error_nonbool(util);
2492 }
2493
2494 int git_configset_get_string_multi(struct config_set *cs, const char *key,
2495 const struct string_list **dest)
2496 {
2497 int ret;
2498
2499 if ((ret = git_configset_get_value_multi(cs, key, dest)))
2500 return ret;
2501 if ((ret = for_each_string_list((struct string_list *)*dest,
2502 check_multi_string, (void *)key)))
2503 return ret;
2504
2505 return 0;
2506 }
2507
2508 int git_configset_get(struct config_set *set, const char *key)
2509 {
2510 struct config_set_element *e;
2511 int ret;
2512
2513 if ((ret = configset_find_element(set, key, &e)))
2514 return ret;
2515 else if (!e)
2516 return 1;
2517 return 0;
2518 }
2519
2520 int git_configset_get_string(struct config_set *set, const char *key, char **dest)
2521 {
2522 const char *value;
2523 if (!git_configset_get_value(set, key, &value, NULL))
2524 return git_config_string((const char **)dest, key, value);
2525 else
2526 return 1;
2527 }
2528
2529 static int git_configset_get_string_tmp(struct config_set *set, const char *key,
2530 const char **dest)
2531 {
2532 const char *value;
2533 if (!git_configset_get_value(set, key, &value, NULL)) {
2534 if (!value)
2535 return config_error_nonbool(key);
2536 *dest = value;
2537 return 0;
2538 } else {
2539 return 1;
2540 }
2541 }
2542
2543 int git_configset_get_int(struct config_set *set, const char *key, int *dest)
2544 {
2545 const char *value;
2546 struct key_value_info kvi;
2547
2548 if (!git_configset_get_value(set, key, &value, &kvi)) {
2549 *dest = git_config_int(key, value, &kvi);
2550 return 0;
2551 } else
2552 return 1;
2553 }
2554
2555 int git_configset_get_ulong(struct config_set *set, const char *key, unsigned long *dest)
2556 {
2557 const char *value;
2558 struct key_value_info kvi;
2559
2560 if (!git_configset_get_value(set, key, &value, &kvi)) {
2561 *dest = git_config_ulong(key, value, &kvi);
2562 return 0;
2563 } else
2564 return 1;
2565 }
2566
2567 int git_configset_get_bool(struct config_set *set, const char *key, int *dest)
2568 {
2569 const char *value;
2570 if (!git_configset_get_value(set, key, &value, NULL)) {
2571 *dest = git_config_bool(key, value);
2572 return 0;
2573 } else
2574 return 1;
2575 }
2576
2577 int git_configset_get_bool_or_int(struct config_set *set, const char *key,
2578 int *is_bool, int *dest)
2579 {
2580 const char *value;
2581 struct key_value_info kvi;
2582
2583 if (!git_configset_get_value(set, key, &value, &kvi)) {
2584 *dest = git_config_bool_or_int(key, value, &kvi, is_bool);
2585 return 0;
2586 } else
2587 return 1;
2588 }
2589
2590 int git_configset_get_maybe_bool(struct config_set *set, const char *key, int *dest)
2591 {
2592 const char *value;
2593 if (!git_configset_get_value(set, key, &value, NULL)) {
2594 *dest = git_parse_maybe_bool(value);
2595 if (*dest == -1)
2596 return -1;
2597 return 0;
2598 } else
2599 return 1;
2600 }
2601
2602 int git_configset_get_pathname(struct config_set *set, const char *key, const char **dest)
2603 {
2604 const char *value;
2605 if (!git_configset_get_value(set, key, &value, NULL))
2606 return git_config_pathname(dest, key, value);
2607 else
2608 return 1;
2609 }
2610
2611 /* Functions use to read configuration from a repository */
2612 static void repo_read_config(struct repository *repo)
2613 {
2614 struct config_options opts = { 0 };
2615
2616 opts.respect_includes = 1;
2617 opts.commondir = repo->commondir;
2618 opts.git_dir = repo->gitdir;
2619
2620 if (!repo->config)
2621 CALLOC_ARRAY(repo->config, 1);
2622 else
2623 git_configset_clear(repo->config);
2624
2625 git_configset_init(repo->config);
2626 if (config_with_options(config_set_callback, repo->config, NULL,
2627 repo, &opts) < 0)
2628 /*
2629 * config_with_options() normally returns only
2630 * zero, as most errors are fatal, and
2631 * non-fatal potential errors are guarded by "if"
2632 * statements that are entered only when no error is
2633 * possible.
2634 *
2635 * If we ever encounter a non-fatal error, it means
2636 * something went really wrong and we should stop
2637 * immediately.
2638 */
2639 die(_("unknown error occurred while reading the configuration files"));
2640 }
2641
2642 static void git_config_check_init(struct repository *repo)
2643 {
2644 if (repo->config && repo->config->hash_initialized)
2645 return;
2646 repo_read_config(repo);
2647 }
2648
2649 static void repo_config_clear(struct repository *repo)
2650 {
2651 if (!repo->config || !repo->config->hash_initialized)
2652 return;
2653 git_configset_clear(repo->config);
2654 }
2655
2656 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2657 {
2658 git_config_check_init(repo);
2659 configset_iter(repo->config, fn, data);
2660 }
2661
2662 int repo_config_get(struct repository *repo, const char *key)
2663 {
2664 git_config_check_init(repo);
2665 return git_configset_get(repo->config, key);
2666 }
2667
2668 int repo_config_get_value(struct repository *repo,
2669 const char *key, const char **value)
2670 {
2671 git_config_check_init(repo);
2672 return git_configset_get_value(repo->config, key, value, NULL);
2673 }
2674
2675 int repo_config_get_value_multi(struct repository *repo, const char *key,
2676 const struct string_list **dest)
2677 {
2678 git_config_check_init(repo);
2679 return git_configset_get_value_multi(repo->config, key, dest);
2680 }
2681
2682 int repo_config_get_string_multi(struct repository *repo, const char *key,
2683 const struct string_list **dest)
2684 {
2685 git_config_check_init(repo);
2686 return git_configset_get_string_multi(repo->config, key, dest);
2687 }
2688
2689 int repo_config_get_string(struct repository *repo,
2690 const char *key, char **dest)
2691 {
2692 int ret;
2693 git_config_check_init(repo);
2694 ret = git_configset_get_string(repo->config, key, dest);
2695 if (ret < 0)
2696 git_die_config(key, NULL);
2697 return ret;
2698 }
2699
2700 int repo_config_get_string_tmp(struct repository *repo,
2701 const char *key, const char **dest)
2702 {
2703 int ret;
2704 git_config_check_init(repo);
2705 ret = git_configset_get_string_tmp(repo->config, key, dest);
2706 if (ret < 0)
2707 git_die_config(key, NULL);
2708 return ret;
2709 }
2710
2711 int repo_config_get_int(struct repository *repo,
2712 const char *key, int *dest)
2713 {
2714 git_config_check_init(repo);
2715 return git_configset_get_int(repo->config, key, dest);
2716 }
2717
2718 int repo_config_get_ulong(struct repository *repo,
2719 const char *key, unsigned long *dest)
2720 {
2721 git_config_check_init(repo);
2722 return git_configset_get_ulong(repo->config, key, dest);
2723 }
2724
2725 int repo_config_get_bool(struct repository *repo,
2726 const char *key, int *dest)
2727 {
2728 git_config_check_init(repo);
2729 return git_configset_get_bool(repo->config, key, dest);
2730 }
2731
2732 int repo_config_get_bool_or_int(struct repository *repo,
2733 const char *key, int *is_bool, int *dest)
2734 {
2735 git_config_check_init(repo);
2736 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2737 }
2738
2739 int repo_config_get_maybe_bool(struct repository *repo,
2740 const char *key, int *dest)
2741 {
2742 git_config_check_init(repo);
2743 return git_configset_get_maybe_bool(repo->config, key, dest);
2744 }
2745
2746 int repo_config_get_pathname(struct repository *repo,
2747 const char *key, const char **dest)
2748 {
2749 int ret;
2750 git_config_check_init(repo);
2751 ret = git_configset_get_pathname(repo->config, key, dest);
2752 if (ret < 0)
2753 git_die_config(key, NULL);
2754 return ret;
2755 }
2756
2757 /* Read values into protected_config. */
2758 static void read_protected_config(void)
2759 {
2760 struct config_options opts = {
2761 .respect_includes = 1,
2762 .ignore_repo = 1,
2763 .ignore_worktree = 1,
2764 .system_gently = 1,
2765 };
2766
2767 git_configset_init(&protected_config);
2768 config_with_options(config_set_callback, &protected_config, NULL,
2769 NULL, &opts);
2770 }
2771
2772 void git_protected_config(config_fn_t fn, void *data)
2773 {
2774 if (!protected_config.hash_initialized)
2775 read_protected_config();
2776 configset_iter(&protected_config, fn, data);
2777 }
2778
2779 /* Functions used historically to read configuration from 'the_repository' */
2780 void git_config(config_fn_t fn, void *data)
2781 {
2782 repo_config(the_repository, fn, data);
2783 }
2784
2785 void git_config_clear(void)
2786 {
2787 repo_config_clear(the_repository);
2788 }
2789
2790 int git_config_get(const char *key)
2791 {
2792 return repo_config_get(the_repository, key);
2793 }
2794
2795 int git_config_get_value(const char *key, const char **value)
2796 {
2797 return repo_config_get_value(the_repository, key, value);
2798 }
2799
2800 int git_config_get_value_multi(const char *key, const struct string_list **dest)
2801 {
2802 return repo_config_get_value_multi(the_repository, key, dest);
2803 }
2804
2805 int git_config_get_string_multi(const char *key,
2806 const struct string_list **dest)
2807 {
2808 return repo_config_get_string_multi(the_repository, key, dest);
2809 }
2810
2811 int git_config_get_string(const char *key, char **dest)
2812 {
2813 return repo_config_get_string(the_repository, key, dest);
2814 }
2815
2816 int git_config_get_string_tmp(const char *key, const char **dest)
2817 {
2818 return repo_config_get_string_tmp(the_repository, key, dest);
2819 }
2820
2821 int git_config_get_int(const char *key, int *dest)
2822 {
2823 return repo_config_get_int(the_repository, key, dest);
2824 }
2825
2826 int git_config_get_ulong(const char *key, unsigned long *dest)
2827 {
2828 return repo_config_get_ulong(the_repository, key, dest);
2829 }
2830
2831 int git_config_get_bool(const char *key, int *dest)
2832 {
2833 return repo_config_get_bool(the_repository, key, dest);
2834 }
2835
2836 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2837 {
2838 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2839 }
2840
2841 int git_config_get_maybe_bool(const char *key, int *dest)
2842 {
2843 return repo_config_get_maybe_bool(the_repository, key, dest);
2844 }
2845
2846 int git_config_get_pathname(const char *key, const char **dest)
2847 {
2848 return repo_config_get_pathname(the_repository, key, dest);
2849 }
2850
2851 int git_config_get_expiry(const char *key, const char **output)
2852 {
2853 int ret = git_config_get_string(key, (char **)output);
2854 if (ret)
2855 return ret;
2856 if (strcmp(*output, "now")) {
2857 timestamp_t now = approxidate("now");
2858 if (approxidate(*output) >= now)
2859 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2860 }
2861 return ret;
2862 }
2863
2864 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2865 {
2866 const char *expiry_string;
2867 intmax_t days;
2868 timestamp_t when;
2869
2870 if (git_config_get_string_tmp(key, &expiry_string))
2871 return 1; /* no such thing */
2872
2873 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2874 const int scale = 86400;
2875 *expiry = now - days * scale;
2876 return 0;
2877 }
2878
2879 if (!parse_expiry_date(expiry_string, &when)) {
2880 *expiry = when;
2881 return 0;
2882 }
2883 return -1; /* thing exists but cannot be parsed */
2884 }
2885
2886 int git_config_get_split_index(void)
2887 {
2888 int val;
2889
2890 if (!git_config_get_maybe_bool("core.splitindex", &val))
2891 return val;
2892
2893 return -1; /* default value */
2894 }
2895
2896 int git_config_get_max_percent_split_change(void)
2897 {
2898 int val = -1;
2899
2900 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2901 if (0 <= val && val <= 100)
2902 return val;
2903
2904 return error(_("splitIndex.maxPercentChange value '%d' "
2905 "should be between 0 and 100"), val);
2906 }
2907
2908 return -1; /* default value */
2909 }
2910
2911 int git_config_get_index_threads(int *dest)
2912 {
2913 int is_bool, val;
2914
2915 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2916 if (val) {
2917 *dest = val;
2918 return 0;
2919 }
2920
2921 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2922 if (is_bool)
2923 *dest = val ? 0 : 1;
2924 else
2925 *dest = val;
2926 return 0;
2927 }
2928
2929 return 1;
2930 }
2931
2932 NORETURN
2933 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2934 {
2935 if (!filename)
2936 die(_("unable to parse '%s' from command-line config"), key);
2937 else
2938 die(_("bad config variable '%s' in file '%s' at line %d"),
2939 key, filename, linenr);
2940 }
2941
2942 NORETURN __attribute__((format(printf, 2, 3)))
2943 void git_die_config(const char *key, const char *err, ...)
2944 {
2945 const struct string_list *values;
2946 struct key_value_info *kv_info;
2947 report_fn error_fn = get_error_routine();
2948
2949 if (err) {
2950 va_list params;
2951 va_start(params, err);
2952 error_fn(err, params);
2953 va_end(params);
2954 }
2955 if (git_config_get_value_multi(key, &values))
2956 BUG("for key '%s' we must have a value to report on", key);
2957 kv_info = values->items[values->nr - 1].util;
2958 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2959 }
2960
2961 /*
2962 * Find all the stuff for git_config_set() below.
2963 */
2964
2965 struct config_store_data {
2966 size_t baselen;
2967 char *key;
2968 int do_not_match;
2969 const char *fixed_value;
2970 regex_t *value_pattern;
2971 int multi_replace;
2972 struct {
2973 size_t begin, end;
2974 enum config_event_t type;
2975 int is_keys_section;
2976 } *parsed;
2977 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2978 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2979 };
2980 #define CONFIG_STORE_INIT { 0 }
2981
2982 static void config_store_data_clear(struct config_store_data *store)
2983 {
2984 free(store->key);
2985 if (store->value_pattern != NULL &&
2986 store->value_pattern != CONFIG_REGEX_NONE) {
2987 regfree(store->value_pattern);
2988 free(store->value_pattern);
2989 }
2990 free(store->parsed);
2991 free(store->seen);
2992 memset(store, 0, sizeof(*store));
2993 }
2994
2995 static int matches(const char *key, const char *value,
2996 const struct config_store_data *store)
2997 {
2998 if (strcmp(key, store->key))
2999 return 0; /* not ours */
3000 if (store->fixed_value)
3001 return !strcmp(store->fixed_value, value);
3002 if (!store->value_pattern)
3003 return 1; /* always matches */
3004 if (store->value_pattern == CONFIG_REGEX_NONE)
3005 return 0; /* never matches */
3006
3007 return store->do_not_match ^
3008 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
3009 }
3010
3011 static int store_aux_event(enum config_event_t type, size_t begin, size_t end,
3012 struct config_source *cs, void *data)
3013 {
3014 struct config_store_data *store = data;
3015
3016 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
3017 store->parsed[store->parsed_nr].begin = begin;
3018 store->parsed[store->parsed_nr].end = end;
3019 store->parsed[store->parsed_nr].type = type;
3020
3021 if (type == CONFIG_EVENT_SECTION) {
3022 int (*cmpfn)(const char *, const char *, size_t);
3023
3024 if (cs->var.len < 2 || cs->var.buf[cs->var.len - 1] != '.')
3025 return error(_("invalid section name '%s'"), cs->var.buf);
3026
3027 if (cs->subsection_case_sensitive)
3028 cmpfn = strncasecmp;
3029 else
3030 cmpfn = strncmp;
3031
3032 /* Is this the section we were looking for? */
3033 store->is_keys_section =
3034 store->parsed[store->parsed_nr].is_keys_section =
3035 cs->var.len - 1 == store->baselen &&
3036 !cmpfn(cs->var.buf, store->key, store->baselen);
3037 if (store->is_keys_section) {
3038 store->section_seen = 1;
3039 ALLOC_GROW(store->seen, store->seen_nr + 1,
3040 store->seen_alloc);
3041 store->seen[store->seen_nr] = store->parsed_nr;
3042 }
3043 }
3044
3045 store->parsed_nr++;
3046
3047 return 0;
3048 }
3049
3050 static int store_aux(const char *key, const char *value,
3051 const struct config_context *ctx UNUSED, void *cb)
3052 {
3053 struct config_store_data *store = cb;
3054
3055 if (store->key_seen) {
3056 if (matches(key, value, store)) {
3057 if (store->seen_nr == 1 && store->multi_replace == 0) {
3058 warning(_("%s has multiple values"), key);
3059 }
3060
3061 ALLOC_GROW(store->seen, store->seen_nr + 1,
3062 store->seen_alloc);
3063
3064 store->seen[store->seen_nr] = store->parsed_nr;
3065 store->seen_nr++;
3066 }
3067 } else if (store->is_keys_section) {
3068 /*
3069 * Do not increment matches yet: this may not be a match, but we
3070 * are in the desired section.
3071 */
3072 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
3073 store->seen[store->seen_nr] = store->parsed_nr;
3074 store->section_seen = 1;
3075
3076 if (matches(key, value, store)) {
3077 store->seen_nr++;
3078 store->key_seen = 1;
3079 }
3080 }
3081
3082 return 0;
3083 }
3084
3085 static int write_error(const char *filename)
3086 {
3087 error(_("failed to write new configuration file %s"), filename);
3088
3089 /* Same error code as "failed to rename". */
3090 return 4;
3091 }
3092
3093 static struct strbuf store_create_section(const char *key,
3094 const struct config_store_data *store)
3095 {
3096 const char *dot;
3097 size_t i;
3098 struct strbuf sb = STRBUF_INIT;
3099
3100 dot = memchr(key, '.', store->baselen);
3101 if (dot) {
3102 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
3103 for (i = dot - key + 1; i < store->baselen; i++) {
3104 if (key[i] == '"' || key[i] == '\\')
3105 strbuf_addch(&sb, '\\');
3106 strbuf_addch(&sb, key[i]);
3107 }
3108 strbuf_addstr(&sb, "\"]\n");
3109 } else {
3110 strbuf_addch(&sb, '[');
3111 strbuf_add(&sb, key, store->baselen);
3112 strbuf_addstr(&sb, "]\n");
3113 }
3114
3115 return sb;
3116 }
3117
3118 static ssize_t write_section(int fd, const char *key,
3119 const struct config_store_data *store)
3120 {
3121 struct strbuf sb = store_create_section(key, store);
3122 ssize_t ret;
3123
3124 ret = write_in_full(fd, sb.buf, sb.len);
3125 strbuf_release(&sb);
3126
3127 return ret;
3128 }
3129
3130 static ssize_t write_pair(int fd, const char *key, const char *value,
3131 const struct config_store_data *store)
3132 {
3133 int i;
3134 ssize_t ret;
3135 const char *quote = "";
3136 struct strbuf sb = STRBUF_INIT;
3137
3138 /*
3139 * Check to see if the value needs to be surrounded with a dq pair.
3140 * Note that problematic characters are always backslash-quoted; this
3141 * check is about not losing leading or trailing SP and strings that
3142 * follow beginning-of-comment characters (i.e. ';' and '#') by the
3143 * configuration parser.
3144 */
3145 if (value[0] == ' ')
3146 quote = "\"";
3147 for (i = 0; value[i]; i++)
3148 if (value[i] == ';' || value[i] == '#')
3149 quote = "\"";
3150 if (i && value[i - 1] == ' ')
3151 quote = "\"";
3152
3153 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
3154
3155 for (i = 0; value[i]; i++)
3156 switch (value[i]) {
3157 case '\n':
3158 strbuf_addstr(&sb, "\\n");
3159 break;
3160 case '\t':
3161 strbuf_addstr(&sb, "\\t");
3162 break;
3163 case '"':
3164 case '\\':
3165 strbuf_addch(&sb, '\\');
3166 /* fallthrough */
3167 default:
3168 strbuf_addch(&sb, value[i]);
3169 break;
3170 }
3171 strbuf_addf(&sb, "%s\n", quote);
3172
3173 ret = write_in_full(fd, sb.buf, sb.len);
3174 strbuf_release(&sb);
3175
3176 return ret;
3177 }
3178
3179 /*
3180 * If we are about to unset the last key(s) in a section, and if there are
3181 * no comments surrounding (or included in) the section, we will want to
3182 * extend begin/end to remove the entire section.
3183 *
3184 * Note: the parameter `seen_ptr` points to the index into the store.seen
3185 * array. * This index may be incremented if a section has more than one
3186 * entry (which all are to be removed).
3187 */
3188 static void maybe_remove_section(struct config_store_data *store,
3189 size_t *begin_offset, size_t *end_offset,
3190 int *seen_ptr)
3191 {
3192 size_t begin;
3193 int i, seen, section_seen = 0;
3194
3195 /*
3196 * First, ensure that this is the first key, and that there are no
3197 * comments before the entry nor before the section header.
3198 */
3199 seen = *seen_ptr;
3200 for (i = store->seen[seen]; i > 0; i--) {
3201 enum config_event_t type = store->parsed[i - 1].type;
3202
3203 if (type == CONFIG_EVENT_COMMENT)
3204 /* There is a comment before this entry or section */
3205 return;
3206 if (type == CONFIG_EVENT_ENTRY) {
3207 if (!section_seen)
3208 /* This is not the section's first entry. */
3209 return;
3210 /* We encountered no comment before the section. */
3211 break;
3212 }
3213 if (type == CONFIG_EVENT_SECTION) {
3214 if (!store->parsed[i - 1].is_keys_section)
3215 break;
3216 section_seen = 1;
3217 }
3218 }
3219 begin = store->parsed[i].begin;
3220
3221 /*
3222 * Next, make sure that we are removing the last key(s) in the section,
3223 * and that there are no comments that are possibly about the current
3224 * section.
3225 */
3226 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
3227 enum config_event_t type = store->parsed[i].type;
3228
3229 if (type == CONFIG_EVENT_COMMENT)
3230 return;
3231 if (type == CONFIG_EVENT_SECTION) {
3232 if (store->parsed[i].is_keys_section)
3233 continue;
3234 break;
3235 }
3236 if (type == CONFIG_EVENT_ENTRY) {
3237 if (++seen < store->seen_nr &&
3238 i == store->seen[seen])
3239 /* We want to remove this entry, too */
3240 continue;
3241 /* There is another entry in this section. */
3242 return;
3243 }
3244 }
3245
3246 /*
3247 * We are really removing the last entry/entries from this section, and
3248 * there are no enclosed or surrounding comments. Remove the entire,
3249 * now-empty section.
3250 */
3251 *seen_ptr = seen;
3252 *begin_offset = begin;
3253 if (i < store->parsed_nr)
3254 *end_offset = store->parsed[i].begin;
3255 else
3256 *end_offset = store->parsed[store->parsed_nr - 1].end;
3257 }
3258
3259 int git_config_set_in_file_gently(const char *config_filename,
3260 const char *key, const char *value)
3261 {
3262 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
3263 }
3264
3265 void git_config_set_in_file(const char *config_filename,
3266 const char *key, const char *value)
3267 {
3268 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
3269 }
3270
3271 int git_config_set_gently(const char *key, const char *value)
3272 {
3273 return git_config_set_multivar_gently(key, value, NULL, 0);
3274 }
3275
3276 int repo_config_set_worktree_gently(struct repository *r,
3277 const char *key, const char *value)
3278 {
3279 /* Only use worktree-specific config if it is already enabled. */
3280 if (r->repository_format_worktree_config) {
3281 char *file = repo_git_path(r, "config.worktree");
3282 int ret = git_config_set_multivar_in_file_gently(
3283 file, key, value, NULL, 0);
3284 free(file);
3285 return ret;
3286 }
3287 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3288 }
3289
3290 void git_config_set(const char *key, const char *value)
3291 {
3292 git_config_set_multivar(key, value, NULL, 0);
3293
3294 trace2_cmd_set_config(key, value);
3295 }
3296
3297 /*
3298 * If value==NULL, unset in (remove from) config,
3299 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
3300 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
3301 * (only add a new one)
3302 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
3303 * key/values are removed before a single new pair is written. If the
3304 * flag is not present, then replace only the first match.
3305 *
3306 * Returns 0 on success.
3307 *
3308 * This function does this:
3309 *
3310 * - it locks the config file by creating ".git/config.lock"
3311 *
3312 * - it then parses the config using store_aux() as validator to find
3313 * the position on the key/value pair to replace. If it is to be unset,
3314 * it must be found exactly once.
3315 *
3316 * - the config file is mmap()ed and the part before the match (if any) is
3317 * written to the lock file, then the changed part and the rest.
3318 *
3319 * - the config file is removed and the lock file rename()d to it.
3320 *
3321 */
3322 int git_config_set_multivar_in_file_gently(const char *config_filename,
3323 const char *key, const char *value,
3324 const char *value_pattern,
3325 unsigned flags)
3326 {
3327 int fd = -1, in_fd = -1;
3328 int ret;
3329 struct lock_file lock = LOCK_INIT;
3330 char *filename_buf = NULL;
3331 char *contents = NULL;
3332 size_t contents_sz;
3333 struct config_store_data store = CONFIG_STORE_INIT;
3334
3335 /* parse-key returns negative; flip the sign to feed exit(3) */
3336 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
3337 if (ret)
3338 goto out_free;
3339
3340 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
3341
3342 if (!config_filename)
3343 config_filename = filename_buf = git_pathdup("config");
3344
3345 /*
3346 * The lock serves a purpose in addition to locking: the new
3347 * contents of .git/config will be written into it.
3348 */
3349 fd = hold_lock_file_for_update(&lock, config_filename, 0);
3350 if (fd < 0) {
3351 error_errno(_("could not lock config file %s"), config_filename);
3352 ret = CONFIG_NO_LOCK;
3353 goto out_free;
3354 }
3355
3356 /*
3357 * If .git/config does not exist yet, write a minimal version.
3358 */
3359 in_fd = open(config_filename, O_RDONLY);
3360 if ( in_fd < 0 ) {
3361 if ( ENOENT != errno ) {
3362 error_errno(_("opening %s"), config_filename);
3363 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
3364 goto out_free;
3365 }
3366 /* if nothing to unset, error out */
3367 if (!value) {
3368 ret = CONFIG_NOTHING_SET;
3369 goto out_free;
3370 }
3371
3372 free(store.key);
3373 store.key = xstrdup(key);
3374 if (write_section(fd, key, &store) < 0 ||
3375 write_pair(fd, key, value, &store) < 0)
3376 goto write_err_out;
3377 } else {
3378 struct stat st;
3379 size_t copy_begin, copy_end;
3380 int i, new_line = 0;
3381 struct config_options opts;
3382
3383 if (!value_pattern)
3384 store.value_pattern = NULL;
3385 else if (value_pattern == CONFIG_REGEX_NONE)
3386 store.value_pattern = CONFIG_REGEX_NONE;
3387 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
3388 store.fixed_value = value_pattern;
3389 else {
3390 if (value_pattern[0] == '!') {
3391 store.do_not_match = 1;
3392 value_pattern++;
3393 } else
3394 store.do_not_match = 0;
3395
3396 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3397 if (regcomp(store.value_pattern, value_pattern,
3398 REG_EXTENDED)) {
3399 error(_("invalid pattern: %s"), value_pattern);
3400 FREE_AND_NULL(store.value_pattern);
3401 ret = CONFIG_INVALID_PATTERN;
3402 goto out_free;
3403 }
3404 }
3405
3406 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3407 store.parsed[0].end = 0;
3408
3409 memset(&opts, 0, sizeof(opts));
3410 opts.event_fn = store_aux_event;
3411 opts.event_fn_data = &store;
3412
3413 /*
3414 * After this, store.parsed will contain offsets of all the
3415 * parsed elements, and store.seen will contain a list of
3416 * matches, as indices into store.parsed.
3417 *
3418 * As a side effect, we make sure to transform only a valid
3419 * existing config file.
3420 */
3421 if (git_config_from_file_with_options(store_aux,
3422 config_filename,
3423 &store, CONFIG_SCOPE_UNKNOWN,
3424 &opts)) {
3425 error(_("invalid config file %s"), config_filename);
3426 ret = CONFIG_INVALID_FILE;
3427 goto out_free;
3428 }
3429
3430 /* if nothing to unset, or too many matches, error out */
3431 if ((store.seen_nr == 0 && value == NULL) ||
3432 (store.seen_nr > 1 && !store.multi_replace)) {
3433 ret = CONFIG_NOTHING_SET;
3434 goto out_free;
3435 }
3436
3437 if (fstat(in_fd, &st) == -1) {
3438 error_errno(_("fstat on %s failed"), config_filename);
3439 ret = CONFIG_INVALID_FILE;
3440 goto out_free;
3441 }
3442
3443 contents_sz = xsize_t(st.st_size);
3444 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3445 MAP_PRIVATE, in_fd, 0);
3446 if (contents == MAP_FAILED) {
3447 if (errno == ENODEV && S_ISDIR(st.st_mode))
3448 errno = EISDIR;
3449 error_errno(_("unable to mmap '%s'%s"),
3450 config_filename, mmap_os_err());
3451 ret = CONFIG_INVALID_FILE;
3452 contents = NULL;
3453 goto out_free;
3454 }
3455 close(in_fd);
3456 in_fd = -1;
3457
3458 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3459 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3460 ret = CONFIG_NO_WRITE;
3461 goto out_free;
3462 }
3463
3464 if (store.seen_nr == 0) {
3465 if (!store.seen_alloc) {
3466 /* Did not see key nor section */
3467 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3468 store.seen[0] = store.parsed_nr
3469 - !!store.parsed_nr;
3470 }
3471 store.seen_nr = 1;
3472 }
3473
3474 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3475 size_t replace_end;
3476 int j = store.seen[i];
3477
3478 new_line = 0;
3479 if (!store.key_seen) {
3480 copy_end = store.parsed[j].end;
3481 /* include '\n' when copying section header */
3482 if (copy_end > 0 && copy_end < contents_sz &&
3483 contents[copy_end - 1] != '\n' &&
3484 contents[copy_end] == '\n')
3485 copy_end++;
3486 replace_end = copy_end;
3487 } else {
3488 replace_end = store.parsed[j].end;
3489 copy_end = store.parsed[j].begin;
3490 if (!value)
3491 maybe_remove_section(&store,
3492 &copy_end,
3493 &replace_end, &i);
3494 /*
3495 * Swallow preceding white-space on the same
3496 * line.
3497 */
3498 while (copy_end > 0 ) {
3499 char c = contents[copy_end - 1];
3500
3501 if (isspace(c) && c != '\n')
3502 copy_end--;
3503 else
3504 break;
3505 }
3506 }
3507
3508 if (copy_end > 0 && contents[copy_end-1] != '\n')
3509 new_line = 1;
3510
3511 /* write the first part of the config */
3512 if (copy_end > copy_begin) {
3513 if (write_in_full(fd, contents + copy_begin,
3514 copy_end - copy_begin) < 0)
3515 goto write_err_out;
3516 if (new_line &&
3517 write_str_in_full(fd, "\n") < 0)
3518 goto write_err_out;
3519 }
3520 copy_begin = replace_end;
3521 }
3522
3523 /* write the pair (value == NULL means unset) */
3524 if (value) {
3525 if (!store.section_seen) {
3526 if (write_section(fd, key, &store) < 0)
3527 goto write_err_out;
3528 }
3529 if (write_pair(fd, key, value, &store) < 0)
3530 goto write_err_out;
3531 }
3532
3533 /* write the rest of the config */
3534 if (copy_begin < contents_sz)
3535 if (write_in_full(fd, contents + copy_begin,
3536 contents_sz - copy_begin) < 0)
3537 goto write_err_out;
3538
3539 munmap(contents, contents_sz);
3540 contents = NULL;
3541 }
3542
3543 if (commit_lock_file(&lock) < 0) {
3544 error_errno(_("could not write config file %s"), config_filename);
3545 ret = CONFIG_NO_WRITE;
3546 goto out_free;
3547 }
3548
3549 ret = 0;
3550
3551 /* Invalidate the config cache */
3552 git_config_clear();
3553
3554 out_free:
3555 rollback_lock_file(&lock);
3556 free(filename_buf);
3557 if (contents)
3558 munmap(contents, contents_sz);
3559 if (in_fd >= 0)
3560 close(in_fd);
3561 config_store_data_clear(&store);
3562 return ret;
3563
3564 write_err_out:
3565 ret = write_error(get_lock_file_path(&lock));
3566 goto out_free;
3567
3568 }
3569
3570 void git_config_set_multivar_in_file(const char *config_filename,
3571 const char *key, const char *value,
3572 const char *value_pattern, unsigned flags)
3573 {
3574 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
3575 value_pattern, flags))
3576 return;
3577 if (value)
3578 die(_("could not set '%s' to '%s'"), key, value);
3579 else
3580 die(_("could not unset '%s'"), key);
3581 }
3582
3583 int git_config_set_multivar_gently(const char *key, const char *value,
3584 const char *value_pattern, unsigned flags)
3585 {
3586 return repo_config_set_multivar_gently(the_repository, key, value,
3587 value_pattern, flags);
3588 }
3589
3590 int repo_config_set_multivar_gently(struct repository *r, const char *key,
3591 const char *value,
3592 const char *value_pattern, unsigned flags)
3593 {
3594 char *file = repo_git_path(r, "config");
3595 int res = git_config_set_multivar_in_file_gently(file,
3596 key, value,
3597 value_pattern,
3598 flags);
3599 free(file);
3600 return res;
3601 }
3602
3603 void git_config_set_multivar(const char *key, const char *value,
3604 const char *value_pattern, unsigned flags)
3605 {
3606 git_config_set_multivar_in_file(git_path("config"),
3607 key, value, value_pattern,
3608 flags);
3609 }
3610
3611 static size_t section_name_match (const char *buf, const char *name)
3612 {
3613 size_t i = 0, j = 0;
3614 int dot = 0;
3615 if (buf[i] != '[')
3616 return 0;
3617 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3618 if (!dot && isspace(buf[i])) {
3619 dot = 1;
3620 if (name[j++] != '.')
3621 break;
3622 for (i++; isspace(buf[i]); i++)
3623 ; /* do nothing */
3624 if (buf[i] != '"')
3625 break;
3626 continue;
3627 }
3628 if (buf[i] == '\\' && dot)
3629 i++;
3630 else if (buf[i] == '"' && dot) {
3631 for (i++; isspace(buf[i]); i++)
3632 ; /* do_nothing */
3633 break;
3634 }
3635 if (buf[i] != name[j++])
3636 break;
3637 }
3638 if (buf[i] == ']' && name[j] == 0) {
3639 /*
3640 * We match, now just find the right length offset by
3641 * gobbling up any whitespace after it, as well
3642 */
3643 i++;
3644 for (; buf[i] && isspace(buf[i]); i++)
3645 ; /* do nothing */
3646 return i;
3647 }
3648 return 0;
3649 }
3650
3651 static int section_name_is_ok(const char *name)
3652 {
3653 /* Empty section names are bogus. */
3654 if (!*name)
3655 return 0;
3656
3657 /*
3658 * Before a dot, we must be alphanumeric or dash. After the first dot,
3659 * anything goes, so we can stop checking.
3660 */
3661 for (; *name && *name != '.'; name++)
3662 if (*name != '-' && !isalnum(*name))
3663 return 0;
3664 return 1;
3665 }
3666
3667 #define GIT_CONFIG_MAX_LINE_LEN (512 * 1024)
3668
3669 /* if new_name == NULL, the section is removed instead */
3670 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3671 const char *old_name,
3672 const char *new_name, int copy)
3673 {
3674 int ret = 0, remove = 0;
3675 char *filename_buf = NULL;
3676 struct lock_file lock = LOCK_INIT;
3677 int out_fd;
3678 struct strbuf buf = STRBUF_INIT;
3679 FILE *config_file = NULL;
3680 struct stat st;
3681 struct strbuf copystr = STRBUF_INIT;
3682 struct config_store_data store;
3683 uint32_t line_nr = 0;
3684
3685 memset(&store, 0, sizeof(store));
3686
3687 if (new_name && !section_name_is_ok(new_name)) {
3688 ret = error(_("invalid section name: %s"), new_name);
3689 goto out_no_rollback;
3690 }
3691
3692 if (!config_filename)
3693 config_filename = filename_buf = git_pathdup("config");
3694
3695 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3696 if (out_fd < 0) {
3697 ret = error(_("could not lock config file %s"), config_filename);
3698 goto out;
3699 }
3700
3701 if (!(config_file = fopen(config_filename, "rb"))) {
3702 ret = warn_on_fopen_errors(config_filename);
3703 if (ret)
3704 goto out;
3705 /* no config file means nothing to rename, no error */
3706 goto commit_and_out;
3707 }
3708
3709 if (fstat(fileno(config_file), &st) == -1) {
3710 ret = error_errno(_("fstat on %s failed"), config_filename);
3711 goto out;
3712 }
3713
3714 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3715 ret = error_errno(_("chmod on %s failed"),
3716 get_lock_file_path(&lock));
3717 goto out;
3718 }
3719
3720 while (!strbuf_getwholeline(&buf, config_file, '\n')) {
3721 size_t i, length;
3722 int is_section = 0;
3723 char *output = buf.buf;
3724
3725 line_nr++;
3726
3727 if (buf.len >= GIT_CONFIG_MAX_LINE_LEN) {
3728 ret = error(_("refusing to work with overly long line "
3729 "in '%s' on line %"PRIuMAX),
3730 config_filename, (uintmax_t)line_nr);
3731 goto out;
3732 }
3733
3734 for (i = 0; buf.buf[i] && isspace(buf.buf[i]); i++)
3735 ; /* do nothing */
3736 if (buf.buf[i] == '[') {
3737 /* it's a section */
3738 size_t offset;
3739 is_section = 1;
3740
3741 /*
3742 * When encountering a new section under -c we
3743 * need to flush out any section we're already
3744 * coping and begin anew. There might be
3745 * multiple [branch "$name"] sections.
3746 */
3747 if (copystr.len > 0) {
3748 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3749 ret = write_error(get_lock_file_path(&lock));
3750 goto out;
3751 }
3752 strbuf_reset(&copystr);
3753 }
3754
3755 offset = section_name_match(&buf.buf[i], old_name);
3756 if (offset > 0) {
3757 ret++;
3758 if (!new_name) {
3759 remove = 1;
3760 continue;
3761 }
3762 store.baselen = strlen(new_name);
3763 if (!copy) {
3764 if (write_section(out_fd, new_name, &store) < 0) {
3765 ret = write_error(get_lock_file_path(&lock));
3766 goto out;
3767 }
3768 /*
3769 * We wrote out the new section, with
3770 * a newline, now skip the old
3771 * section's length
3772 */
3773 output += offset + i;
3774 if (strlen(output) > 0) {
3775 /*
3776 * More content means there's
3777 * a declaration to put on the
3778 * next line; indent with a
3779 * tab
3780 */
3781 output -= 1;
3782 output[0] = '\t';
3783 }
3784 } else {
3785 strbuf_release(&copystr);
3786 copystr = store_create_section(new_name, &store);
3787 }
3788 }
3789 remove = 0;
3790 }
3791 if (remove)
3792 continue;
3793 length = strlen(output);
3794
3795 if (!is_section && copystr.len > 0) {
3796 strbuf_add(&copystr, output, length);
3797 }
3798
3799 if (write_in_full(out_fd, output, length) < 0) {
3800 ret = write_error(get_lock_file_path(&lock));
3801 goto out;
3802 }
3803 }
3804
3805 /*
3806 * Copy a trailing section at the end of the config, won't be
3807 * flushed by the usual "flush because we have a new section
3808 * logic in the loop above.
3809 */
3810 if (copystr.len > 0) {
3811 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3812 ret = write_error(get_lock_file_path(&lock));
3813 goto out;
3814 }
3815 strbuf_reset(&copystr);
3816 }
3817
3818 fclose(config_file);
3819 config_file = NULL;
3820 commit_and_out:
3821 if (commit_lock_file(&lock) < 0)
3822 ret = error_errno(_("could not write config file %s"),
3823 config_filename);
3824 out:
3825 if (config_file)
3826 fclose(config_file);
3827 rollback_lock_file(&lock);
3828 out_no_rollback:
3829 free(filename_buf);
3830 config_store_data_clear(&store);
3831 strbuf_release(&buf);
3832 strbuf_release(&copystr);
3833 return ret;
3834 }
3835
3836 int git_config_rename_section_in_file(const char *config_filename,
3837 const char *old_name, const char *new_name)
3838 {
3839 return git_config_copy_or_rename_section_in_file(config_filename,
3840 old_name, new_name, 0);
3841 }
3842
3843 int git_config_rename_section(const char *old_name, const char *new_name)
3844 {
3845 return git_config_rename_section_in_file(NULL, old_name, new_name);
3846 }
3847
3848 int git_config_copy_section_in_file(const char *config_filename,
3849 const char *old_name, const char *new_name)
3850 {
3851 return git_config_copy_or_rename_section_in_file(config_filename,
3852 old_name, new_name, 1);
3853 }
3854
3855 int git_config_copy_section(const char *old_name, const char *new_name)
3856 {
3857 return git_config_copy_section_in_file(NULL, old_name, new_name);
3858 }
3859
3860 /*
3861 * Call this to report error for your variable that should not
3862 * get a boolean value (i.e. "[my] var" means "true").
3863 */
3864 #undef config_error_nonbool
3865 int config_error_nonbool(const char *var)
3866 {
3867 return error(_("missing value for '%s'"), var);
3868 }
3869
3870 int parse_config_key(const char *var,
3871 const char *section,
3872 const char **subsection, size_t *subsection_len,
3873 const char **key)
3874 {
3875 const char *dot;
3876
3877 /* Does it start with "section." ? */
3878 if (!skip_prefix(var, section, &var) || *var != '.')
3879 return -1;
3880
3881 /*
3882 * Find the key; we don't know yet if we have a subsection, but we must
3883 * parse backwards from the end, since the subsection may have dots in
3884 * it, too.
3885 */
3886 dot = strrchr(var, '.');
3887 *key = dot + 1;
3888
3889 /* Did we have a subsection at all? */
3890 if (dot == var) {
3891 if (subsection) {
3892 *subsection = NULL;
3893 *subsection_len = 0;
3894 }
3895 }
3896 else {
3897 if (!subsection)
3898 return -1;
3899 *subsection = var + 1;
3900 *subsection_len = dot - *subsection;
3901 }
3902
3903 return 0;
3904 }
3905
3906 const char *config_origin_type_name(enum config_origin_type type)
3907 {
3908 switch (type) {
3909 case CONFIG_ORIGIN_BLOB:
3910 return "blob";
3911 case CONFIG_ORIGIN_FILE:
3912 return "file";
3913 case CONFIG_ORIGIN_STDIN:
3914 return "standard input";
3915 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3916 return "submodule-blob";
3917 case CONFIG_ORIGIN_CMDLINE:
3918 return "command line";
3919 default:
3920 BUG("unknown config origin type");
3921 }
3922 }
3923
3924 const char *config_scope_name(enum config_scope scope)
3925 {
3926 switch (scope) {
3927 case CONFIG_SCOPE_SYSTEM:
3928 return "system";
3929 case CONFIG_SCOPE_GLOBAL:
3930 return "global";
3931 case CONFIG_SCOPE_LOCAL:
3932 return "local";
3933 case CONFIG_SCOPE_WORKTREE:
3934 return "worktree";
3935 case CONFIG_SCOPE_COMMAND:
3936 return "command";
3937 case CONFIG_SCOPE_SUBMODULE:
3938 return "submodule";
3939 default:
3940 return "unknown";
3941 }
3942 }
3943
3944 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3945 {
3946 int i;
3947
3948 for (i = 0; i < nr_mapping; i++) {
3949 const char *name = mapping[i];
3950
3951 if (name && !strcasecmp(var, name))
3952 return i;
3953 }
3954 return -1;
3955 }
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