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Merge branch 'gc/config-partial-submodule-kvi-fix'
[git/debian.git] / config.c
blob08a782e6a76f8f009191334489a15355c2345869
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 "alloc.h"
12 #include "date.h"
13 #include "branch.h"
14 #include "config.h"
15 #include "convert.h"
16 #include "environment.h"
17 #include "gettext.h"
18 #include "ident.h"
19 #include "repository.h"
20 #include "lockfile.h"
21 #include "mailmap.h"
22 #include "exec-cmd.h"
23 #include "strbuf.h"
24 #include "quote.h"
25 #include "hashmap.h"
26 #include "string-list.h"
27 #include "object-name.h"
28 #include "object-store-ll.h"
29 #include "pager.h"
30 #include "path.h"
31 #include "utf8.h"
32 #include "dir.h"
33 #include "color.h"
34 #include "replace-object.h"
35 #include "refs.h"
36 #include "setup.h"
37 #include "strvec.h"
38 #include "trace2.h"
39 #include "wildmatch.h"
40 #include "worktree.h"
41 #include "ws.h"
42 #include "wrapper.h"
43 #include "write-or-die.h"
44
45 struct config_source {
46 struct config_source *prev;
47 union {
48 FILE *file;
49 struct config_buf {
50 const char *buf;
51 size_t len;
52 size_t pos;
53 } buf;
54 } u;
55 enum config_origin_type origin_type;
56 const char *name;
57 const char *path;
58 enum config_error_action default_error_action;
59 int linenr;
60 int eof;
61 size_t total_len;
62 struct strbuf value;
63 struct strbuf var;
64 unsigned subsection_case_sensitive : 1;
65
66 int (*do_fgetc)(struct config_source *c);
67 int (*do_ungetc)(int c, struct config_source *conf);
68 long (*do_ftell)(struct config_source *c);
69 };
70 #define CONFIG_SOURCE_INIT { 0 }
71
72 struct config_reader {
73 /*
74 * These members record the "current" config source, which can be
75 * accessed by parsing callbacks.
76 *
77 * The "source" variable will be non-NULL only when we are actually
78 * parsing a real config source (file, blob, cmdline, etc).
79 *
80 * The "config_kvi" variable will be non-NULL only when we are feeding
81 * cached config from a configset into a callback.
82 *
83 * They cannot be non-NULL at the same time. If they are both NULL, then
84 * we aren't parsing anything (and depending on the function looking at
85 * the variables, it's either a bug for it to be called in the first
86 * place, or it's a function which can be reused for non-config
87 * purposes, and should fall back to some sane behavior).
88 */
89 struct config_source *source;
90 struct key_value_info *config_kvi;
91 /*
92 * The "scope" of the current config source being parsed (repo, global,
93 * etc). Like "source", this is only set when parsing a config source.
94 * It's not part of "source" because it transcends a single file (i.e.,
95 * a file included from .git/config is still in "repo" scope).
96 *
97 * When iterating through a configset, the equivalent value is
98 * "config_kvi.scope" (see above).
99 */
100 enum config_scope parsing_scope;
101 };
102 /*
103 * Where possible, prefer to accept "struct config_reader" as an arg than to use
104 * "the_reader". "the_reader" should only be used if that is infeasible, e.g. in
105 * a public function.
106 */
107 static struct config_reader the_reader;
108
109 static inline void config_reader_push_source(struct config_reader *reader,
110 struct config_source *top)
111 {
112 top->prev = reader->source;
113 reader->source = top;
114 }
115
116 static inline struct config_source *config_reader_pop_source(struct config_reader *reader)
117 {
118 struct config_source *ret;
119 if (!reader->source)
120 BUG("tried to pop config source, but we weren't reading config");
121 ret = reader->source;
122 reader->source = reader->source->prev;
123 return ret;
124 }
125
126 static inline void config_reader_set_kvi(struct config_reader *reader,
127 struct key_value_info *kvi)
128 {
129 reader->config_kvi = kvi;
130 }
131
132 static inline void config_reader_set_scope(struct config_reader *reader,
133 enum config_scope scope)
134 {
135 reader->parsing_scope = scope;
136 }
137
138 static int pack_compression_seen;
139 static int zlib_compression_seen;
140
141 /*
142 * Config that comes from trusted scopes, namely:
143 * - CONFIG_SCOPE_SYSTEM (e.g. /etc/gitconfig)
144 * - CONFIG_SCOPE_GLOBAL (e.g. $HOME/.gitconfig, $XDG_CONFIG_HOME/git)
145 * - CONFIG_SCOPE_COMMAND (e.g. "-c" option, environment variables)
146 *
147 * This is declared here for code cleanliness, but unlike the other
148 * static variables, this does not hold config parser state.
149 */
150 static struct config_set protected_config;
151
152 static int config_file_fgetc(struct config_source *conf)
153 {
154 return getc_unlocked(conf->u.file);
155 }
156
157 static int config_file_ungetc(int c, struct config_source *conf)
158 {
159 return ungetc(c, conf->u.file);
160 }
161
162 static long config_file_ftell(struct config_source *conf)
163 {
164 return ftell(conf->u.file);
165 }
166
167
168 static int config_buf_fgetc(struct config_source *conf)
169 {
170 if (conf->u.buf.pos < conf->u.buf.len)
171 return conf->u.buf.buf[conf->u.buf.pos++];
172
173 return EOF;
174 }
175
176 static int config_buf_ungetc(int c, struct config_source *conf)
177 {
178 if (conf->u.buf.pos > 0) {
179 conf->u.buf.pos--;
180 if (conf->u.buf.buf[conf->u.buf.pos] != c)
181 BUG("config_buf can only ungetc the same character");
182 return c;
183 }
184
185 return EOF;
186 }
187
188 static long config_buf_ftell(struct config_source *conf)
189 {
190 return conf->u.buf.pos;
191 }
192
193 struct config_include_data {
194 int depth;
195 config_fn_t fn;
196 void *data;
197 const struct config_options *opts;
198 struct git_config_source *config_source;
199 struct repository *repo;
200 struct config_reader *config_reader;
201
202 /*
203 * All remote URLs discovered when reading all config files.
204 */
205 struct string_list *remote_urls;
206 };
207 #define CONFIG_INCLUDE_INIT { 0 }
208
209 static int git_config_include(const char *var, const char *value, void *data);
210
211 #define MAX_INCLUDE_DEPTH 10
212 static const char include_depth_advice[] = N_(
213 "exceeded maximum include depth (%d) while including\n"
214 " %s\n"
215 "from\n"
216 " %s\n"
217 "This might be due to circular includes.");
218 static int handle_path_include(struct config_source *cs, const char *path,
219 struct config_include_data *inc)
220 {
221 int ret = 0;
222 struct strbuf buf = STRBUF_INIT;
223 char *expanded;
224
225 if (!path)
226 return config_error_nonbool("include.path");
227
228 expanded = interpolate_path(path, 0);
229 if (!expanded)
230 return error(_("could not expand include path '%s'"), path);
231 path = expanded;
232
233 /*
234 * Use an absolute path as-is, but interpret relative paths
235 * based on the including config file.
236 */
237 if (!is_absolute_path(path)) {
238 char *slash;
239
240 if (!cs || !cs->path) {
241 ret = error(_("relative config includes must come from files"));
242 goto cleanup;
243 }
244
245 slash = find_last_dir_sep(cs->path);
246 if (slash)
247 strbuf_add(&buf, cs->path, slash - cs->path + 1);
248 strbuf_addstr(&buf, path);
249 path = buf.buf;
250 }
251
252 if (!access_or_die(path, R_OK, 0)) {
253 if (++inc->depth > MAX_INCLUDE_DEPTH)
254 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
255 !cs ? "<unknown>" :
256 cs->name ? cs->name :
257 "the command line");
258 ret = git_config_from_file(git_config_include, path, inc);
259 inc->depth--;
260 }
261 cleanup:
262 strbuf_release(&buf);
263 free(expanded);
264 return ret;
265 }
266
267 static void add_trailing_starstar_for_dir(struct strbuf *pat)
268 {
269 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
270 strbuf_addstr(pat, "**");
271 }
272
273 static int prepare_include_condition_pattern(struct config_source *cs,
274 struct strbuf *pat)
275 {
276 struct strbuf path = STRBUF_INIT;
277 char *expanded;
278 int prefix = 0;
279
280 expanded = interpolate_path(pat->buf, 1);
281 if (expanded) {
282 strbuf_reset(pat);
283 strbuf_addstr(pat, expanded);
284 free(expanded);
285 }
286
287 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
288 const char *slash;
289
290 if (!cs || !cs->path)
291 return error(_("relative config include "
292 "conditionals must come from files"));
293
294 strbuf_realpath(&path, cs->path, 1);
295 slash = find_last_dir_sep(path.buf);
296 if (!slash)
297 BUG("how is this possible?");
298 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
299 prefix = slash - path.buf + 1 /* slash */;
300 } else if (!is_absolute_path(pat->buf))
301 strbuf_insertstr(pat, 0, "**/");
302
303 add_trailing_starstar_for_dir(pat);
304
305 strbuf_release(&path);
306 return prefix;
307 }
308
309 static int include_by_gitdir(struct config_source *cs,
310 const struct config_options *opts,
311 const char *cond, size_t cond_len, int icase)
312 {
313 struct strbuf text = STRBUF_INIT;
314 struct strbuf pattern = STRBUF_INIT;
315 int ret = 0, prefix;
316 const char *git_dir;
317 int already_tried_absolute = 0;
318
319 if (opts->git_dir)
320 git_dir = opts->git_dir;
321 else
322 goto done;
323
324 strbuf_realpath(&text, git_dir, 1);
325 strbuf_add(&pattern, cond, cond_len);
326 prefix = prepare_include_condition_pattern(cs, &pattern);
327
328 again:
329 if (prefix < 0)
330 goto done;
331
332 if (prefix > 0) {
333 /*
334 * perform literal matching on the prefix part so that
335 * any wildcard character in it can't create side effects.
336 */
337 if (text.len < prefix)
338 goto done;
339 if (!icase && strncmp(pattern.buf, text.buf, prefix))
340 goto done;
341 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
342 goto done;
343 }
344
345 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
346 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
347
348 if (!ret && !already_tried_absolute) {
349 /*
350 * We've tried e.g. matching gitdir:~/work, but if
351 * ~/work is a symlink to /mnt/storage/work
352 * strbuf_realpath() will expand it, so the rule won't
353 * match. Let's match against a
354 * strbuf_add_absolute_path() version of the path,
355 * which'll do the right thing
356 */
357 strbuf_reset(&text);
358 strbuf_add_absolute_path(&text, git_dir);
359 already_tried_absolute = 1;
360 goto again;
361 }
362 done:
363 strbuf_release(&pattern);
364 strbuf_release(&text);
365 return ret;
366 }
367
368 static int include_by_branch(const char *cond, size_t cond_len)
369 {
370 int flags;
371 int ret;
372 struct strbuf pattern = STRBUF_INIT;
373 const char *refname = !the_repository->gitdir ?
374 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
375 const char *shortname;
376
377 if (!refname || !(flags & REF_ISSYMREF) ||
378 !skip_prefix(refname, "refs/heads/", &shortname))
379 return 0;
380
381 strbuf_add(&pattern, cond, cond_len);
382 add_trailing_starstar_for_dir(&pattern);
383 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
384 strbuf_release(&pattern);
385 return ret;
386 }
387
388 static int add_remote_url(const char *var, const char *value, void *data)
389 {
390 struct string_list *remote_urls = data;
391 const char *remote_name;
392 size_t remote_name_len;
393 const char *key;
394
395 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
396 &key) &&
397 remote_name &&
398 !strcmp(key, "url"))
399 string_list_append(remote_urls, value);
400 return 0;
401 }
402
403 static void populate_remote_urls(struct config_include_data *inc)
404 {
405 struct config_options opts;
406
407 enum config_scope store_scope = inc->config_reader->parsing_scope;
408
409 opts = *inc->opts;
410 opts.unconditional_remote_url = 1;
411
412 config_reader_set_scope(inc->config_reader, 0);
413
414 inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
415 string_list_init_dup(inc->remote_urls);
416 config_with_options(add_remote_url, inc->remote_urls,
417 inc->config_source, inc->repo, &opts);
418
419 config_reader_set_scope(inc->config_reader, store_scope);
420 }
421
422 static int forbid_remote_url(const char *var, const char *value UNUSED,
423 void *data UNUSED)
424 {
425 const char *remote_name;
426 size_t remote_name_len;
427 const char *key;
428
429 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
430 &key) &&
431 remote_name &&
432 !strcmp(key, "url"))
433 die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url"));
434 return 0;
435 }
436
437 static int at_least_one_url_matches_glob(const char *glob, int glob_len,
438 struct string_list *remote_urls)
439 {
440 struct strbuf pattern = STRBUF_INIT;
441 struct string_list_item *url_item;
442 int found = 0;
443
444 strbuf_add(&pattern, glob, glob_len);
445 for_each_string_list_item(url_item, remote_urls) {
446 if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) {
447 found = 1;
448 break;
449 }
450 }
451 strbuf_release(&pattern);
452 return found;
453 }
454
455 static int include_by_remote_url(struct config_include_data *inc,
456 const char *cond, size_t cond_len)
457 {
458 if (inc->opts->unconditional_remote_url)
459 return 1;
460 if (!inc->remote_urls)
461 populate_remote_urls(inc);
462 return at_least_one_url_matches_glob(cond, cond_len,
463 inc->remote_urls);
464 }
465
466 static int include_condition_is_true(struct config_source *cs,
467 struct config_include_data *inc,
468 const char *cond, size_t cond_len)
469 {
470 const struct config_options *opts = inc->opts;
471
472 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
473 return include_by_gitdir(cs, opts, cond, cond_len, 0);
474 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
475 return include_by_gitdir(cs, opts, cond, cond_len, 1);
476 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
477 return include_by_branch(cond, cond_len);
478 else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond,
479 &cond_len))
480 return include_by_remote_url(inc, cond, cond_len);
481
482 /* unknown conditionals are always false */
483 return 0;
484 }
485
486 static int git_config_include(const char *var, const char *value, void *data)
487 {
488 struct config_include_data *inc = data;
489 struct config_source *cs = inc->config_reader->source;
490 const char *cond, *key;
491 size_t cond_len;
492 int ret;
493
494 /*
495 * Pass along all values, including "include" directives; this makes it
496 * possible to query information on the includes themselves.
497 */
498 ret = inc->fn(var, value, inc->data);
499 if (ret < 0)
500 return ret;
501
502 if (!strcmp(var, "include.path"))
503 ret = handle_path_include(cs, value, inc);
504
505 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
506 cond && include_condition_is_true(cs, inc, cond, cond_len) &&
507 !strcmp(key, "path")) {
508 config_fn_t old_fn = inc->fn;
509
510 if (inc->opts->unconditional_remote_url)
511 inc->fn = forbid_remote_url;
512 ret = handle_path_include(cs, value, inc);
513 inc->fn = old_fn;
514 }
515
516 return ret;
517 }
518
519 static void git_config_push_split_parameter(const char *key, const char *value)
520 {
521 struct strbuf env = STRBUF_INIT;
522 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
523 if (old && *old) {
524 strbuf_addstr(&env, old);
525 strbuf_addch(&env, ' ');
526 }
527 sq_quote_buf(&env, key);
528 strbuf_addch(&env, '=');
529 if (value)
530 sq_quote_buf(&env, value);
531 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
532 strbuf_release(&env);
533 }
534
535 void git_config_push_parameter(const char *text)
536 {
537 const char *value;
538
539 /*
540 * When we see:
541 *
542 * section.subsection=with=equals.key=value
543 *
544 * we cannot tell if it means:
545 *
546 * [section "subsection=with=equals"]
547 * key = value
548 *
549 * or:
550 *
551 * [section]
552 * subsection = with=equals.key=value
553 *
554 * We parse left-to-right for the first "=", meaning we'll prefer to
555 * keep the value intact over the subsection. This is historical, but
556 * also sensible since values are more likely to contain odd or
557 * untrusted input than a section name.
558 *
559 * A missing equals is explicitly allowed (as a bool-only entry).
560 */
561 value = strchr(text, '=');
562 if (value) {
563 char *key = xmemdupz(text, value - text);
564 git_config_push_split_parameter(key, value + 1);
565 free(key);
566 } else {
567 git_config_push_split_parameter(text, NULL);
568 }
569 }
570
571 void git_config_push_env(const char *spec)
572 {
573 char *key;
574 const char *env_name;
575 const char *env_value;
576
577 env_name = strrchr(spec, '=');
578 if (!env_name)
579 die(_("invalid config format: %s"), spec);
580 key = xmemdupz(spec, env_name - spec);
581 env_name++;
582 if (!*env_name)
583 die(_("missing environment variable name for configuration '%.*s'"),
584 (int)(env_name - spec - 1), spec);
585
586 env_value = getenv(env_name);
587 if (!env_value)
588 die(_("missing environment variable '%s' for configuration '%.*s'"),
589 env_name, (int)(env_name - spec - 1), spec);
590
591 git_config_push_split_parameter(key, env_value);
592 free(key);
593 }
594
595 static inline int iskeychar(int c)
596 {
597 return isalnum(c) || c == '-';
598 }
599
600 /*
601 * Auxiliary function to sanity-check and split the key into the section
602 * identifier and variable name.
603 *
604 * Returns 0 on success, -1 when there is an invalid character in the key and
605 * -2 if there is no section name in the key.
606 *
607 * store_key - pointer to char* which will hold a copy of the key with
608 * lowercase section and variable name
609 * baselen - pointer to size_t which will hold the length of the
610 * section + subsection part, can be NULL
611 */
612 int git_config_parse_key(const char *key, char **store_key, size_t *baselen_)
613 {
614 size_t i, baselen;
615 int dot;
616 const char *last_dot = strrchr(key, '.');
617
618 /*
619 * Since "key" actually contains the section name and the real
620 * key name separated by a dot, we have to know where the dot is.
621 */
622
623 if (last_dot == NULL || last_dot == key) {
624 error(_("key does not contain a section: %s"), key);
625 return -CONFIG_NO_SECTION_OR_NAME;
626 }
627
628 if (!last_dot[1]) {
629 error(_("key does not contain variable name: %s"), key);
630 return -CONFIG_NO_SECTION_OR_NAME;
631 }
632
633 baselen = last_dot - key;
634 if (baselen_)
635 *baselen_ = baselen;
636
637 /*
638 * Validate the key and while at it, lower case it for matching.
639 */
640 *store_key = xmallocz(strlen(key));
641
642 dot = 0;
643 for (i = 0; key[i]; i++) {
644 unsigned char c = key[i];
645 if (c == '.')
646 dot = 1;
647 /* Leave the extended basename untouched.. */
648 if (!dot || i > baselen) {
649 if (!iskeychar(c) ||
650 (i == baselen + 1 && !isalpha(c))) {
651 error(_("invalid key: %s"), key);
652 goto out_free_ret_1;
653 }
654 c = tolower(c);
655 } else if (c == '\n') {
656 error(_("invalid key (newline): %s"), key);
657 goto out_free_ret_1;
658 }
659 (*store_key)[i] = c;
660 }
661
662 return 0;
663
664 out_free_ret_1:
665 FREE_AND_NULL(*store_key);
666 return -CONFIG_INVALID_KEY;
667 }
668
669 static int config_parse_pair(const char *key, const char *value,
670 config_fn_t fn, void *data)
671 {
672 char *canonical_name;
673 int ret;
674
675 if (!strlen(key))
676 return error(_("empty config key"));
677 if (git_config_parse_key(key, &canonical_name, NULL))
678 return -1;
679
680 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
681 free(canonical_name);
682 return ret;
683 }
684
685 int git_config_parse_parameter(const char *text,
686 config_fn_t fn, void *data)
687 {
688 const char *value;
689 struct strbuf **pair;
690 int ret;
691
692 pair = strbuf_split_str(text, '=', 2);
693 if (!pair[0])
694 return error(_("bogus config parameter: %s"), text);
695
696 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
697 strbuf_setlen(pair[0], pair[0]->len - 1);
698 value = pair[1] ? pair[1]->buf : "";
699 } else {
700 value = NULL;
701 }
702
703 strbuf_trim(pair[0]);
704 if (!pair[0]->len) {
705 strbuf_list_free(pair);
706 return error(_("bogus config parameter: %s"), text);
707 }
708
709 ret = config_parse_pair(pair[0]->buf, value, fn, data);
710 strbuf_list_free(pair);
711 return ret;
712 }
713
714 static int parse_config_env_list(char *env, config_fn_t fn, void *data)
715 {
716 char *cur = env;
717 while (cur && *cur) {
718 const char *key = sq_dequote_step(cur, &cur);
719 if (!key)
720 return error(_("bogus format in %s"),
721 CONFIG_DATA_ENVIRONMENT);
722
723 if (!cur || isspace(*cur)) {
724 /* old-style 'key=value' */
725 if (git_config_parse_parameter(key, fn, data) < 0)
726 return -1;
727 }
728 else if (*cur == '=') {
729 /* new-style 'key'='value' */
730 const char *value;
731
732 cur++;
733 if (*cur == '\'') {
734 /* quoted value */
735 value = sq_dequote_step(cur, &cur);
736 if (!value || (cur && !isspace(*cur))) {
737 return error(_("bogus format in %s"),
738 CONFIG_DATA_ENVIRONMENT);
739 }
740 } else if (!*cur || isspace(*cur)) {
741 /* implicit bool: 'key'= */
742 value = NULL;
743 } else {
744 return error(_("bogus format in %s"),
745 CONFIG_DATA_ENVIRONMENT);
746 }
747
748 if (config_parse_pair(key, value, fn, data) < 0)
749 return -1;
750 }
751 else {
752 /* unknown format */
753 return error(_("bogus format in %s"),
754 CONFIG_DATA_ENVIRONMENT);
755 }
756
757 if (cur) {
758 while (isspace(*cur))
759 cur++;
760 }
761 }
762 return 0;
763 }
764
765 int git_config_from_parameters(config_fn_t fn, void *data)
766 {
767 const char *env;
768 struct strbuf envvar = STRBUF_INIT;
769 struct strvec to_free = STRVEC_INIT;
770 int ret = 0;
771 char *envw = NULL;
772 struct config_source source = CONFIG_SOURCE_INIT;
773
774 source.origin_type = CONFIG_ORIGIN_CMDLINE;
775 config_reader_push_source(&the_reader, &source);
776
777 env = getenv(CONFIG_COUNT_ENVIRONMENT);
778 if (env) {
779 unsigned long count;
780 char *endp;
781 int i;
782
783 count = strtoul(env, &endp, 10);
784 if (*endp) {
785 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
786 goto out;
787 }
788 if (count > INT_MAX) {
789 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
790 goto out;
791 }
792
793 for (i = 0; i < count; i++) {
794 const char *key, *value;
795
796 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
797 key = getenv_safe(&to_free, envvar.buf);
798 if (!key) {
799 ret = error(_("missing config key %s"), envvar.buf);
800 goto out;
801 }
802 strbuf_reset(&envvar);
803
804 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
805 value = getenv_safe(&to_free, envvar.buf);
806 if (!value) {
807 ret = error(_("missing config value %s"), envvar.buf);
808 goto out;
809 }
810 strbuf_reset(&envvar);
811
812 if (config_parse_pair(key, value, fn, data) < 0) {
813 ret = -1;
814 goto out;
815 }
816 }
817 }
818
819 env = getenv(CONFIG_DATA_ENVIRONMENT);
820 if (env) {
821 /* sq_dequote will write over it */
822 envw = xstrdup(env);
823 if (parse_config_env_list(envw, fn, data) < 0) {
824 ret = -1;
825 goto out;
826 }
827 }
828
829 out:
830 strbuf_release(&envvar);
831 strvec_clear(&to_free);
832 free(envw);
833 config_reader_pop_source(&the_reader);
834 return ret;
835 }
836
837 static int get_next_char(struct config_source *cs)
838 {
839 int c = cs->do_fgetc(cs);
840
841 if (c == '\r') {
842 /* DOS like systems */
843 c = cs->do_fgetc(cs);
844 if (c != '\n') {
845 if (c != EOF)
846 cs->do_ungetc(c, cs);
847 c = '\r';
848 }
849 }
850
851 if (c != EOF && ++cs->total_len > INT_MAX) {
852 /*
853 * This is an absurdly long config file; refuse to parse
854 * further in order to protect downstream code from integer
855 * overflows. Note that we can't return an error specifically,
856 * but we can mark EOF and put trash in the return value,
857 * which will trigger a parse error.
858 */
859 cs->eof = 1;
860 return 0;
861 }
862
863 if (c == '\n')
864 cs->linenr++;
865 if (c == EOF) {
866 cs->eof = 1;
867 cs->linenr++;
868 c = '\n';
869 }
870 return c;
871 }
872
873 static char *parse_value(struct config_source *cs)
874 {
875 int quote = 0, comment = 0, space = 0;
876
877 strbuf_reset(&cs->value);
878 for (;;) {
879 int c = get_next_char(cs);
880 if (c == '\n') {
881 if (quote) {
882 cs->linenr--;
883 return NULL;
884 }
885 return cs->value.buf;
886 }
887 if (comment)
888 continue;
889 if (isspace(c) && !quote) {
890 if (cs->value.len)
891 space++;
892 continue;
893 }
894 if (!quote) {
895 if (c == ';' || c == '#') {
896 comment = 1;
897 continue;
898 }
899 }
900 for (; space; space--)
901 strbuf_addch(&cs->value, ' ');
902 if (c == '\\') {
903 c = get_next_char(cs);
904 switch (c) {
905 case '\n':
906 continue;
907 case 't':
908 c = '\t';
909 break;
910 case 'b':
911 c = '\b';
912 break;
913 case 'n':
914 c = '\n';
915 break;
916 /* Some characters escape as themselves */
917 case '\\': case '"':
918 break;
919 /* Reject unknown escape sequences */
920 default:
921 return NULL;
922 }
923 strbuf_addch(&cs->value, c);
924 continue;
925 }
926 if (c == '"') {
927 quote = 1-quote;
928 continue;
929 }
930 strbuf_addch(&cs->value, c);
931 }
932 }
933
934 static int get_value(struct config_source *cs, config_fn_t fn, void *data,
935 struct strbuf *name)
936 {
937 int c;
938 char *value;
939 int ret;
940
941 /* Get the full name */
942 for (;;) {
943 c = get_next_char(cs);
944 if (cs->eof)
945 break;
946 if (!iskeychar(c))
947 break;
948 strbuf_addch(name, tolower(c));
949 }
950
951 while (c == ' ' || c == '\t')
952 c = get_next_char(cs);
953
954 value = NULL;
955 if (c != '\n') {
956 if (c != '=')
957 return -1;
958 value = parse_value(cs);
959 if (!value)
960 return -1;
961 }
962 /*
963 * We already consumed the \n, but we need linenr to point to
964 * the line we just parsed during the call to fn to get
965 * accurate line number in error messages.
966 */
967 cs->linenr--;
968 ret = fn(name->buf, value, data);
969 if (ret >= 0)
970 cs->linenr++;
971 return ret;
972 }
973
974 static int get_extended_base_var(struct config_source *cs, struct strbuf *name,
975 int c)
976 {
977 cs->subsection_case_sensitive = 0;
978 do {
979 if (c == '\n')
980 goto error_incomplete_line;
981 c = get_next_char(cs);
982 } while (isspace(c));
983
984 /* We require the format to be '[base "extension"]' */
985 if (c != '"')
986 return -1;
987 strbuf_addch(name, '.');
988
989 for (;;) {
990 int c = get_next_char(cs);
991 if (c == '\n')
992 goto error_incomplete_line;
993 if (c == '"')
994 break;
995 if (c == '\\') {
996 c = get_next_char(cs);
997 if (c == '\n')
998 goto error_incomplete_line;
999 }
1000 strbuf_addch(name, c);
1001 }
1002
1003 /* Final ']' */
1004 if (get_next_char(cs) != ']')
1005 return -1;
1006 return 0;
1007 error_incomplete_line:
1008 cs->linenr--;
1009 return -1;
1010 }
1011
1012 static int get_base_var(struct config_source *cs, struct strbuf *name)
1013 {
1014 cs->subsection_case_sensitive = 1;
1015 for (;;) {
1016 int c = get_next_char(cs);
1017 if (cs->eof)
1018 return -1;
1019 if (c == ']')
1020 return 0;
1021 if (isspace(c))
1022 return get_extended_base_var(cs, name, c);
1023 if (!iskeychar(c) && c != '.')
1024 return -1;
1025 strbuf_addch(name, tolower(c));
1026 }
1027 }
1028
1029 struct parse_event_data {
1030 enum config_event_t previous_type;
1031 size_t previous_offset;
1032 const struct config_options *opts;
1033 };
1034
1035 static int do_event(struct config_source *cs, enum config_event_t type,
1036 struct parse_event_data *data)
1037 {
1038 size_t offset;
1039
1040 if (!data->opts || !data->opts->event_fn)
1041 return 0;
1042
1043 if (type == CONFIG_EVENT_WHITESPACE &&
1044 data->previous_type == type)
1045 return 0;
1046
1047 offset = cs->do_ftell(cs);
1048 /*
1049 * At EOF, the parser always "inserts" an extra '\n', therefore
1050 * the end offset of the event is the current file position, otherwise
1051 * we will already have advanced to the next event.
1052 */
1053 if (type != CONFIG_EVENT_EOF)
1054 offset--;
1055
1056 if (data->previous_type != CONFIG_EVENT_EOF &&
1057 data->opts->event_fn(data->previous_type, data->previous_offset,
1058 offset, data->opts->event_fn_data) < 0)
1059 return -1;
1060
1061 data->previous_type = type;
1062 data->previous_offset = offset;
1063
1064 return 0;
1065 }
1066
1067 static int git_parse_source(struct config_source *cs, config_fn_t fn,
1068 void *data, const struct config_options *opts)
1069 {
1070 int comment = 0;
1071 size_t baselen = 0;
1072 struct strbuf *var = &cs->var;
1073 int error_return = 0;
1074 char *error_msg = NULL;
1075
1076 /* U+FEFF Byte Order Mark in UTF8 */
1077 const char *bomptr = utf8_bom;
1078
1079 /* For the parser event callback */
1080 struct parse_event_data event_data = {
1081 CONFIG_EVENT_EOF, 0, opts
1082 };
1083
1084 for (;;) {
1085 int c;
1086
1087 c = get_next_char(cs);
1088 if (bomptr && *bomptr) {
1089 /* We are at the file beginning; skip UTF8-encoded BOM
1090 * if present. Sane editors won't put this in on their
1091 * own, but e.g. Windows Notepad will do it happily. */
1092 if (c == (*bomptr & 0377)) {
1093 bomptr++;
1094 continue;
1095 } else {
1096 /* Do not tolerate partial BOM. */
1097 if (bomptr != utf8_bom)
1098 break;
1099 /* No BOM at file beginning. Cool. */
1100 bomptr = NULL;
1101 }
1102 }
1103 if (c == '\n') {
1104 if (cs->eof) {
1105 if (do_event(cs, CONFIG_EVENT_EOF, &event_data) < 0)
1106 return -1;
1107 return 0;
1108 }
1109 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1110 return -1;
1111 comment = 0;
1112 continue;
1113 }
1114 if (comment)
1115 continue;
1116 if (isspace(c)) {
1117 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1118 return -1;
1119 continue;
1120 }
1121 if (c == '#' || c == ';') {
1122 if (do_event(cs, CONFIG_EVENT_COMMENT, &event_data) < 0)
1123 return -1;
1124 comment = 1;
1125 continue;
1126 }
1127 if (c == '[') {
1128 if (do_event(cs, CONFIG_EVENT_SECTION, &event_data) < 0)
1129 return -1;
1130
1131 /* Reset prior to determining a new stem */
1132 strbuf_reset(var);
1133 if (get_base_var(cs, var) < 0 || var->len < 1)
1134 break;
1135 strbuf_addch(var, '.');
1136 baselen = var->len;
1137 continue;
1138 }
1139 if (!isalpha(c))
1140 break;
1141
1142 if (do_event(cs, CONFIG_EVENT_ENTRY, &event_data) < 0)
1143 return -1;
1144
1145 /*
1146 * Truncate the var name back to the section header
1147 * stem prior to grabbing the suffix part of the name
1148 * and the value.
1149 */
1150 strbuf_setlen(var, baselen);
1151 strbuf_addch(var, tolower(c));
1152 if (get_value(cs, fn, data, var) < 0)
1153 break;
1154 }
1155
1156 if (do_event(cs, CONFIG_EVENT_ERROR, &event_data) < 0)
1157 return -1;
1158
1159 switch (cs->origin_type) {
1160 case CONFIG_ORIGIN_BLOB:
1161 error_msg = xstrfmt(_("bad config line %d in blob %s"),
1162 cs->linenr, cs->name);
1163 break;
1164 case CONFIG_ORIGIN_FILE:
1165 error_msg = xstrfmt(_("bad config line %d in file %s"),
1166 cs->linenr, cs->name);
1167 break;
1168 case CONFIG_ORIGIN_STDIN:
1169 error_msg = xstrfmt(_("bad config line %d in standard input"),
1170 cs->linenr);
1171 break;
1172 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1173 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1174 cs->linenr, cs->name);
1175 break;
1176 case CONFIG_ORIGIN_CMDLINE:
1177 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1178 cs->linenr, cs->name);
1179 break;
1180 default:
1181 error_msg = xstrfmt(_("bad config line %d in %s"),
1182 cs->linenr, cs->name);
1183 }
1184
1185 switch (opts && opts->error_action ?
1186 opts->error_action :
1187 cs->default_error_action) {
1188 case CONFIG_ERROR_DIE:
1189 die("%s", error_msg);
1190 break;
1191 case CONFIG_ERROR_ERROR:
1192 error_return = error("%s", error_msg);
1193 break;
1194 case CONFIG_ERROR_SILENT:
1195 error_return = -1;
1196 break;
1197 case CONFIG_ERROR_UNSET:
1198 BUG("config error action unset");
1199 }
1200
1201 free(error_msg);
1202 return error_return;
1203 }
1204
1205 static uintmax_t get_unit_factor(const char *end)
1206 {
1207 if (!*end)
1208 return 1;
1209 else if (!strcasecmp(end, "k"))
1210 return 1024;
1211 else if (!strcasecmp(end, "m"))
1212 return 1024 * 1024;
1213 else if (!strcasecmp(end, "g"))
1214 return 1024 * 1024 * 1024;
1215 return 0;
1216 }
1217
1218 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
1219 {
1220 if (value && *value) {
1221 char *end;
1222 intmax_t val;
1223 intmax_t factor;
1224
1225 if (max < 0)
1226 BUG("max must be a positive integer");
1227
1228 errno = 0;
1229 val = strtoimax(value, &end, 0);
1230 if (errno == ERANGE)
1231 return 0;
1232 if (end == value) {
1233 errno = EINVAL;
1234 return 0;
1235 }
1236 factor = get_unit_factor(end);
1237 if (!factor) {
1238 errno = EINVAL;
1239 return 0;
1240 }
1241 if ((val < 0 && -max / factor > val) ||
1242 (val > 0 && max / factor < val)) {
1243 errno = ERANGE;
1244 return 0;
1245 }
1246 val *= factor;
1247 *ret = val;
1248 return 1;
1249 }
1250 errno = EINVAL;
1251 return 0;
1252 }
1253
1254 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
1255 {
1256 if (value && *value) {
1257 char *end;
1258 uintmax_t val;
1259 uintmax_t factor;
1260
1261 /* negative values would be accepted by strtoumax */
1262 if (strchr(value, '-')) {
1263 errno = EINVAL;
1264 return 0;
1265 }
1266 errno = 0;
1267 val = strtoumax(value, &end, 0);
1268 if (errno == ERANGE)
1269 return 0;
1270 if (end == value) {
1271 errno = EINVAL;
1272 return 0;
1273 }
1274 factor = get_unit_factor(end);
1275 if (!factor) {
1276 errno = EINVAL;
1277 return 0;
1278 }
1279 if (unsigned_mult_overflows(factor, val) ||
1280 factor * val > max) {
1281 errno = ERANGE;
1282 return 0;
1283 }
1284 val *= factor;
1285 *ret = val;
1286 return 1;
1287 }
1288 errno = EINVAL;
1289 return 0;
1290 }
1291
1292 int git_parse_int(const char *value, int *ret)
1293 {
1294 intmax_t tmp;
1295 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
1296 return 0;
1297 *ret = tmp;
1298 return 1;
1299 }
1300
1301 static int git_parse_int64(const char *value, int64_t *ret)
1302 {
1303 intmax_t tmp;
1304 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
1305 return 0;
1306 *ret = tmp;
1307 return 1;
1308 }
1309
1310 int git_parse_ulong(const char *value, unsigned long *ret)
1311 {
1312 uintmax_t tmp;
1313 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
1314 return 0;
1315 *ret = tmp;
1316 return 1;
1317 }
1318
1319 int git_parse_ssize_t(const char *value, ssize_t *ret)
1320 {
1321 intmax_t tmp;
1322 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
1323 return 0;
1324 *ret = tmp;
1325 return 1;
1326 }
1327
1328 static int reader_config_name(struct config_reader *reader, const char **out);
1329 static int reader_origin_type(struct config_reader *reader,
1330 enum config_origin_type *type);
1331 NORETURN
1332 static void die_bad_number(struct config_reader *reader, const char *name,
1333 const char *value)
1334 {
1335 const char *error_type = (errno == ERANGE) ?
1336 N_("out of range") : N_("invalid unit");
1337 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1338 const char *config_name = NULL;
1339 enum config_origin_type config_origin = CONFIG_ORIGIN_UNKNOWN;
1340
1341 if (!value)
1342 value = "";
1343
1344 /* Ignoring the return value is okay since we handle missing values. */
1345 reader_config_name(reader, &config_name);
1346 reader_origin_type(reader, &config_origin);
1347
1348 if (!config_name)
1349 die(_(bad_numeric), value, name, _(error_type));
1350
1351 switch (config_origin) {
1352 case CONFIG_ORIGIN_BLOB:
1353 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1354 value, name, config_name, _(error_type));
1355 case CONFIG_ORIGIN_FILE:
1356 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1357 value, name, config_name, _(error_type));
1358 case CONFIG_ORIGIN_STDIN:
1359 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1360 value, name, _(error_type));
1361 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1362 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1363 value, name, config_name, _(error_type));
1364 case CONFIG_ORIGIN_CMDLINE:
1365 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1366 value, name, config_name, _(error_type));
1367 default:
1368 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1369 value, name, config_name, _(error_type));
1370 }
1371 }
1372
1373 int git_config_int(const char *name, const char *value)
1374 {
1375 int ret;
1376 if (!git_parse_int(value, &ret))
1377 die_bad_number(&the_reader, name, value);
1378 return ret;
1379 }
1380
1381 int64_t git_config_int64(const char *name, const char *value)
1382 {
1383 int64_t ret;
1384 if (!git_parse_int64(value, &ret))
1385 die_bad_number(&the_reader, name, value);
1386 return ret;
1387 }
1388
1389 unsigned long git_config_ulong(const char *name, const char *value)
1390 {
1391 unsigned long ret;
1392 if (!git_parse_ulong(value, &ret))
1393 die_bad_number(&the_reader, name, value);
1394 return ret;
1395 }
1396
1397 ssize_t git_config_ssize_t(const char *name, const char *value)
1398 {
1399 ssize_t ret;
1400 if (!git_parse_ssize_t(value, &ret))
1401 die_bad_number(&the_reader, name, value);
1402 return ret;
1403 }
1404
1405 static int git_parse_maybe_bool_text(const char *value)
1406 {
1407 if (!value)
1408 return 1;
1409 if (!*value)
1410 return 0;
1411 if (!strcasecmp(value, "true")
1412 || !strcasecmp(value, "yes")
1413 || !strcasecmp(value, "on"))
1414 return 1;
1415 if (!strcasecmp(value, "false")
1416 || !strcasecmp(value, "no")
1417 || !strcasecmp(value, "off"))
1418 return 0;
1419 return -1;
1420 }
1421
1422 static const struct fsync_component_name {
1423 const char *name;
1424 enum fsync_component component_bits;
1425 } fsync_component_names[] = {
1426 { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT },
1427 { "pack", FSYNC_COMPONENT_PACK },
1428 { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
1429 { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
1430 { "index", FSYNC_COMPONENT_INDEX },
1431 { "objects", FSYNC_COMPONENTS_OBJECTS },
1432 { "reference", FSYNC_COMPONENT_REFERENCE },
1433 { "derived-metadata", FSYNC_COMPONENTS_DERIVED_METADATA },
1434 { "committed", FSYNC_COMPONENTS_COMMITTED },
1435 { "added", FSYNC_COMPONENTS_ADDED },
1436 { "all", FSYNC_COMPONENTS_ALL },
1437 };
1438
1439 static enum fsync_component parse_fsync_components(const char *var, const char *string)
1440 {
1441 enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
1442 enum fsync_component positive = 0, negative = 0;
1443
1444 while (string) {
1445 int i;
1446 size_t len;
1447 const char *ep;
1448 int negated = 0;
1449 int found = 0;
1450
1451 string = string + strspn(string, ", \t\n\r");
1452 ep = strchrnul(string, ',');
1453 len = ep - string;
1454 if (!strcmp(string, "none")) {
1455 current = FSYNC_COMPONENT_NONE;
1456 goto next_name;
1457 }
1458
1459 if (*string == '-') {
1460 negated = 1;
1461 string++;
1462 len--;
1463 if (!len)
1464 warning(_("invalid value for variable %s"), var);
1465 }
1466
1467 if (!len)
1468 break;
1469
1470 for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) {
1471 const struct fsync_component_name *n = &fsync_component_names[i];
1472
1473 if (strncmp(n->name, string, len))
1474 continue;
1475
1476 found = 1;
1477 if (negated)
1478 negative |= n->component_bits;
1479 else
1480 positive |= n->component_bits;
1481 }
1482
1483 if (!found) {
1484 char *component = xstrndup(string, len);
1485 warning(_("ignoring unknown core.fsync component '%s'"), component);
1486 free(component);
1487 }
1488
1489 next_name:
1490 string = ep;
1491 }
1492
1493 return (current & ~negative) | positive;
1494 }
1495
1496 int git_parse_maybe_bool(const char *value)
1497 {
1498 int v = git_parse_maybe_bool_text(value);
1499 if (0 <= v)
1500 return v;
1501 if (git_parse_int(value, &v))
1502 return !!v;
1503 return -1;
1504 }
1505
1506 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1507 {
1508 int v = git_parse_maybe_bool_text(value);
1509 if (0 <= v) {
1510 *is_bool = 1;
1511 return v;
1512 }
1513 *is_bool = 0;
1514 return git_config_int(name, value);
1515 }
1516
1517 int git_config_bool(const char *name, const char *value)
1518 {
1519 int v = git_parse_maybe_bool(value);
1520 if (v < 0)
1521 die(_("bad boolean config value '%s' for '%s'"), value, name);
1522 return v;
1523 }
1524
1525 int git_config_string(const char **dest, const char *var, const char *value)
1526 {
1527 if (!value)
1528 return config_error_nonbool(var);
1529 *dest = xstrdup(value);
1530 return 0;
1531 }
1532
1533 int git_config_pathname(const char **dest, const char *var, const char *value)
1534 {
1535 if (!value)
1536 return config_error_nonbool(var);
1537 *dest = interpolate_path(value, 0);
1538 if (!*dest)
1539 die(_("failed to expand user dir in: '%s'"), value);
1540 return 0;
1541 }
1542
1543 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1544 {
1545 if (!value)
1546 return config_error_nonbool(var);
1547 if (parse_expiry_date(value, timestamp))
1548 return error(_("'%s' for '%s' is not a valid timestamp"),
1549 value, var);
1550 return 0;
1551 }
1552
1553 int git_config_color(char *dest, const char *var, const char *value)
1554 {
1555 if (!value)
1556 return config_error_nonbool(var);
1557 if (color_parse(value, dest) < 0)
1558 return -1;
1559 return 0;
1560 }
1561
1562 static int git_default_core_config(const char *var, const char *value, void *cb)
1563 {
1564 /* This needs a better name */
1565 if (!strcmp(var, "core.filemode")) {
1566 trust_executable_bit = git_config_bool(var, value);
1567 return 0;
1568 }
1569 if (!strcmp(var, "core.trustctime")) {
1570 trust_ctime = git_config_bool(var, value);
1571 return 0;
1572 }
1573 if (!strcmp(var, "core.checkstat")) {
1574 if (!strcasecmp(value, "default"))
1575 check_stat = 1;
1576 else if (!strcasecmp(value, "minimal"))
1577 check_stat = 0;
1578 }
1579
1580 if (!strcmp(var, "core.quotepath")) {
1581 quote_path_fully = git_config_bool(var, value);
1582 return 0;
1583 }
1584
1585 if (!strcmp(var, "core.symlinks")) {
1586 has_symlinks = git_config_bool(var, value);
1587 return 0;
1588 }
1589
1590 if (!strcmp(var, "core.ignorecase")) {
1591 ignore_case = git_config_bool(var, value);
1592 return 0;
1593 }
1594
1595 if (!strcmp(var, "core.attributesfile"))
1596 return git_config_pathname(&git_attributes_file, var, value);
1597
1598 if (!strcmp(var, "core.hookspath"))
1599 return git_config_pathname(&git_hooks_path, var, value);
1600
1601 if (!strcmp(var, "core.bare")) {
1602 is_bare_repository_cfg = git_config_bool(var, value);
1603 return 0;
1604 }
1605
1606 if (!strcmp(var, "core.ignorestat")) {
1607 assume_unchanged = git_config_bool(var, value);
1608 return 0;
1609 }
1610
1611 if (!strcmp(var, "core.prefersymlinkrefs")) {
1612 prefer_symlink_refs = git_config_bool(var, value);
1613 return 0;
1614 }
1615
1616 if (!strcmp(var, "core.logallrefupdates")) {
1617 if (value && !strcasecmp(value, "always"))
1618 log_all_ref_updates = LOG_REFS_ALWAYS;
1619 else if (git_config_bool(var, value))
1620 log_all_ref_updates = LOG_REFS_NORMAL;
1621 else
1622 log_all_ref_updates = LOG_REFS_NONE;
1623 return 0;
1624 }
1625
1626 if (!strcmp(var, "core.warnambiguousrefs")) {
1627 warn_ambiguous_refs = git_config_bool(var, value);
1628 return 0;
1629 }
1630
1631 if (!strcmp(var, "core.abbrev")) {
1632 if (!value)
1633 return config_error_nonbool(var);
1634 if (!strcasecmp(value, "auto"))
1635 default_abbrev = -1;
1636 else if (!git_parse_maybe_bool_text(value))
1637 default_abbrev = the_hash_algo->hexsz;
1638 else {
1639 int abbrev = git_config_int(var, value);
1640 if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
1641 return error(_("abbrev length out of range: %d"), abbrev);
1642 default_abbrev = abbrev;
1643 }
1644 return 0;
1645 }
1646
1647 if (!strcmp(var, "core.disambiguate"))
1648 return set_disambiguate_hint_config(var, value);
1649
1650 if (!strcmp(var, "core.loosecompression")) {
1651 int level = git_config_int(var, value);
1652 if (level == -1)
1653 level = Z_DEFAULT_COMPRESSION;
1654 else if (level < 0 || level > Z_BEST_COMPRESSION)
1655 die(_("bad zlib compression level %d"), level);
1656 zlib_compression_level = level;
1657 zlib_compression_seen = 1;
1658 return 0;
1659 }
1660
1661 if (!strcmp(var, "core.compression")) {
1662 int level = git_config_int(var, value);
1663 if (level == -1)
1664 level = Z_DEFAULT_COMPRESSION;
1665 else if (level < 0 || level > Z_BEST_COMPRESSION)
1666 die(_("bad zlib compression level %d"), level);
1667 if (!zlib_compression_seen)
1668 zlib_compression_level = level;
1669 if (!pack_compression_seen)
1670 pack_compression_level = level;
1671 return 0;
1672 }
1673
1674 if (!strcmp(var, "core.packedgitwindowsize")) {
1675 int pgsz_x2 = getpagesize() * 2;
1676 packed_git_window_size = git_config_ulong(var, value);
1677
1678 /* This value must be multiple of (pagesize * 2) */
1679 packed_git_window_size /= pgsz_x2;
1680 if (packed_git_window_size < 1)
1681 packed_git_window_size = 1;
1682 packed_git_window_size *= pgsz_x2;
1683 return 0;
1684 }
1685
1686 if (!strcmp(var, "core.bigfilethreshold")) {
1687 big_file_threshold = git_config_ulong(var, value);
1688 return 0;
1689 }
1690
1691 if (!strcmp(var, "core.packedgitlimit")) {
1692 packed_git_limit = git_config_ulong(var, value);
1693 return 0;
1694 }
1695
1696 if (!strcmp(var, "core.deltabasecachelimit")) {
1697 delta_base_cache_limit = git_config_ulong(var, value);
1698 return 0;
1699 }
1700
1701 if (!strcmp(var, "core.autocrlf")) {
1702 if (value && !strcasecmp(value, "input")) {
1703 auto_crlf = AUTO_CRLF_INPUT;
1704 return 0;
1705 }
1706 auto_crlf = git_config_bool(var, value);
1707 return 0;
1708 }
1709
1710 if (!strcmp(var, "core.safecrlf")) {
1711 int eol_rndtrp_die;
1712 if (value && !strcasecmp(value, "warn")) {
1713 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1714 return 0;
1715 }
1716 eol_rndtrp_die = git_config_bool(var, value);
1717 global_conv_flags_eol = eol_rndtrp_die ?
1718 CONV_EOL_RNDTRP_DIE : 0;
1719 return 0;
1720 }
1721
1722 if (!strcmp(var, "core.eol")) {
1723 if (value && !strcasecmp(value, "lf"))
1724 core_eol = EOL_LF;
1725 else if (value && !strcasecmp(value, "crlf"))
1726 core_eol = EOL_CRLF;
1727 else if (value && !strcasecmp(value, "native"))
1728 core_eol = EOL_NATIVE;
1729 else
1730 core_eol = EOL_UNSET;
1731 return 0;
1732 }
1733
1734 if (!strcmp(var, "core.checkroundtripencoding")) {
1735 check_roundtrip_encoding = xstrdup(value);
1736 return 0;
1737 }
1738
1739 if (!strcmp(var, "core.notesref")) {
1740 notes_ref_name = xstrdup(value);
1741 return 0;
1742 }
1743
1744 if (!strcmp(var, "core.editor"))
1745 return git_config_string(&editor_program, var, value);
1746
1747 if (!strcmp(var, "core.commentchar")) {
1748 if (!value)
1749 return config_error_nonbool(var);
1750 else if (!strcasecmp(value, "auto"))
1751 auto_comment_line_char = 1;
1752 else if (value[0] && !value[1]) {
1753 comment_line_char = value[0];
1754 auto_comment_line_char = 0;
1755 } else
1756 return error(_("core.commentChar should only be one ASCII character"));
1757 return 0;
1758 }
1759
1760 if (!strcmp(var, "core.askpass"))
1761 return git_config_string(&askpass_program, var, value);
1762
1763 if (!strcmp(var, "core.excludesfile"))
1764 return git_config_pathname(&excludes_file, var, value);
1765
1766 if (!strcmp(var, "core.whitespace")) {
1767 if (!value)
1768 return config_error_nonbool(var);
1769 whitespace_rule_cfg = parse_whitespace_rule(value);
1770 return 0;
1771 }
1772
1773 if (!strcmp(var, "core.fsync")) {
1774 if (!value)
1775 return config_error_nonbool(var);
1776 fsync_components = parse_fsync_components(var, value);
1777 return 0;
1778 }
1779
1780 if (!strcmp(var, "core.fsyncmethod")) {
1781 if (!value)
1782 return config_error_nonbool(var);
1783 if (!strcmp(value, "fsync"))
1784 fsync_method = FSYNC_METHOD_FSYNC;
1785 else if (!strcmp(value, "writeout-only"))
1786 fsync_method = FSYNC_METHOD_WRITEOUT_ONLY;
1787 else if (!strcmp(value, "batch"))
1788 fsync_method = FSYNC_METHOD_BATCH;
1789 else
1790 warning(_("ignoring unknown core.fsyncMethod value '%s'"), value);
1791
1792 }
1793
1794 if (!strcmp(var, "core.fsyncobjectfiles")) {
1795 if (fsync_object_files < 0)
1796 warning(_("core.fsyncObjectFiles is deprecated; use core.fsync instead"));
1797 fsync_object_files = git_config_bool(var, value);
1798 return 0;
1799 }
1800
1801 if (!strcmp(var, "core.preloadindex")) {
1802 core_preload_index = git_config_bool(var, value);
1803 return 0;
1804 }
1805
1806 if (!strcmp(var, "core.createobject")) {
1807 if (!strcmp(value, "rename"))
1808 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1809 else if (!strcmp(value, "link"))
1810 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1811 else
1812 die(_("invalid mode for object creation: %s"), value);
1813 return 0;
1814 }
1815
1816 if (!strcmp(var, "core.sparsecheckout")) {
1817 core_apply_sparse_checkout = git_config_bool(var, value);
1818 return 0;
1819 }
1820
1821 if (!strcmp(var, "core.sparsecheckoutcone")) {
1822 core_sparse_checkout_cone = git_config_bool(var, value);
1823 return 0;
1824 }
1825
1826 if (!strcmp(var, "core.precomposeunicode")) {
1827 precomposed_unicode = git_config_bool(var, value);
1828 return 0;
1829 }
1830
1831 if (!strcmp(var, "core.protecthfs")) {
1832 protect_hfs = git_config_bool(var, value);
1833 return 0;
1834 }
1835
1836 if (!strcmp(var, "core.protectntfs")) {
1837 protect_ntfs = git_config_bool(var, value);
1838 return 0;
1839 }
1840
1841 /* Add other config variables here and to Documentation/config.txt. */
1842 return platform_core_config(var, value, cb);
1843 }
1844
1845 static int git_default_sparse_config(const char *var, const char *value)
1846 {
1847 if (!strcmp(var, "sparse.expectfilesoutsideofpatterns")) {
1848 sparse_expect_files_outside_of_patterns = git_config_bool(var, value);
1849 return 0;
1850 }
1851
1852 /* Add other config variables here and to Documentation/config/sparse.txt. */
1853 return 0;
1854 }
1855
1856 static int git_default_i18n_config(const char *var, const char *value)
1857 {
1858 if (!strcmp(var, "i18n.commitencoding"))
1859 return git_config_string(&git_commit_encoding, var, value);
1860
1861 if (!strcmp(var, "i18n.logoutputencoding"))
1862 return git_config_string(&git_log_output_encoding, var, value);
1863
1864 /* Add other config variables here and to Documentation/config.txt. */
1865 return 0;
1866 }
1867
1868 static int git_default_branch_config(const char *var, const char *value)
1869 {
1870 if (!strcmp(var, "branch.autosetupmerge")) {
1871 if (value && !strcmp(value, "always")) {
1872 git_branch_track = BRANCH_TRACK_ALWAYS;
1873 return 0;
1874 } else if (value && !strcmp(value, "inherit")) {
1875 git_branch_track = BRANCH_TRACK_INHERIT;
1876 return 0;
1877 } else if (value && !strcmp(value, "simple")) {
1878 git_branch_track = BRANCH_TRACK_SIMPLE;
1879 return 0;
1880 }
1881 git_branch_track = git_config_bool(var, value);
1882 return 0;
1883 }
1884 if (!strcmp(var, "branch.autosetuprebase")) {
1885 if (!value)
1886 return config_error_nonbool(var);
1887 else if (!strcmp(value, "never"))
1888 autorebase = AUTOREBASE_NEVER;
1889 else if (!strcmp(value, "local"))
1890 autorebase = AUTOREBASE_LOCAL;
1891 else if (!strcmp(value, "remote"))
1892 autorebase = AUTOREBASE_REMOTE;
1893 else if (!strcmp(value, "always"))
1894 autorebase = AUTOREBASE_ALWAYS;
1895 else
1896 return error(_("malformed value for %s"), var);
1897 return 0;
1898 }
1899
1900 /* Add other config variables here and to Documentation/config.txt. */
1901 return 0;
1902 }
1903
1904 static int git_default_push_config(const char *var, const char *value)
1905 {
1906 if (!strcmp(var, "push.default")) {
1907 if (!value)
1908 return config_error_nonbool(var);
1909 else if (!strcmp(value, "nothing"))
1910 push_default = PUSH_DEFAULT_NOTHING;
1911 else if (!strcmp(value, "matching"))
1912 push_default = PUSH_DEFAULT_MATCHING;
1913 else if (!strcmp(value, "simple"))
1914 push_default = PUSH_DEFAULT_SIMPLE;
1915 else if (!strcmp(value, "upstream"))
1916 push_default = PUSH_DEFAULT_UPSTREAM;
1917 else if (!strcmp(value, "tracking")) /* deprecated */
1918 push_default = PUSH_DEFAULT_UPSTREAM;
1919 else if (!strcmp(value, "current"))
1920 push_default = PUSH_DEFAULT_CURRENT;
1921 else {
1922 error(_("malformed value for %s: %s"), var, value);
1923 return error(_("must be one of nothing, matching, simple, "
1924 "upstream or current"));
1925 }
1926 return 0;
1927 }
1928
1929 /* Add other config variables here and to Documentation/config.txt. */
1930 return 0;
1931 }
1932
1933 static int git_default_mailmap_config(const char *var, const char *value)
1934 {
1935 if (!strcmp(var, "mailmap.file"))
1936 return git_config_pathname(&git_mailmap_file, var, value);
1937 if (!strcmp(var, "mailmap.blob"))
1938 return git_config_string(&git_mailmap_blob, var, value);
1939
1940 /* Add other config variables here and to Documentation/config.txt. */
1941 return 0;
1942 }
1943
1944 int git_default_config(const char *var, const char *value, void *cb)
1945 {
1946 if (starts_with(var, "core."))
1947 return git_default_core_config(var, value, cb);
1948
1949 if (starts_with(var, "user.") ||
1950 starts_with(var, "author.") ||
1951 starts_with(var, "committer."))
1952 return git_ident_config(var, value, cb);
1953
1954 if (starts_with(var, "i18n."))
1955 return git_default_i18n_config(var, value);
1956
1957 if (starts_with(var, "branch."))
1958 return git_default_branch_config(var, value);
1959
1960 if (starts_with(var, "push."))
1961 return git_default_push_config(var, value);
1962
1963 if (starts_with(var, "mailmap."))
1964 return git_default_mailmap_config(var, value);
1965
1966 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1967 return git_default_advice_config(var, value);
1968
1969 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1970 pager_use_color = git_config_bool(var,value);
1971 return 0;
1972 }
1973
1974 if (!strcmp(var, "pack.packsizelimit")) {
1975 pack_size_limit_cfg = git_config_ulong(var, value);
1976 return 0;
1977 }
1978
1979 if (!strcmp(var, "pack.compression")) {
1980 int level = git_config_int(var, value);
1981 if (level == -1)
1982 level = Z_DEFAULT_COMPRESSION;
1983 else if (level < 0 || level > Z_BEST_COMPRESSION)
1984 die(_("bad pack compression level %d"), level);
1985 pack_compression_level = level;
1986 pack_compression_seen = 1;
1987 return 0;
1988 }
1989
1990 if (starts_with(var, "sparse."))
1991 return git_default_sparse_config(var, value);
1992
1993 /* Add other config variables here and to Documentation/config.txt. */
1994 return 0;
1995 }
1996
1997 /*
1998 * All source specific fields in the union, die_on_error, name and the callbacks
1999 * fgetc, ungetc, ftell of top need to be initialized before calling
2000 * this function.
2001 */
2002 static int do_config_from(struct config_reader *reader,
2003 struct config_source *top, config_fn_t fn, void *data,
2004 const struct config_options *opts)
2005 {
2006 int ret;
2007
2008 /* push config-file parsing state stack */
2009 top->linenr = 1;
2010 top->eof = 0;
2011 top->total_len = 0;
2012 strbuf_init(&top->value, 1024);
2013 strbuf_init(&top->var, 1024);
2014 config_reader_push_source(reader, top);
2015
2016 ret = git_parse_source(top, fn, data, opts);
2017
2018 /* pop config-file parsing state stack */
2019 strbuf_release(&top->value);
2020 strbuf_release(&top->var);
2021 config_reader_pop_source(reader);
2022
2023 return ret;
2024 }
2025
2026 static int do_config_from_file(struct config_reader *reader,
2027 config_fn_t fn,
2028 const enum config_origin_type origin_type,
2029 const char *name, const char *path, FILE *f,
2030 void *data, const struct config_options *opts)
2031 {
2032 struct config_source top = CONFIG_SOURCE_INIT;
2033 int ret;
2034
2035 top.u.file = f;
2036 top.origin_type = origin_type;
2037 top.name = name;
2038 top.path = path;
2039 top.default_error_action = CONFIG_ERROR_DIE;
2040 top.do_fgetc = config_file_fgetc;
2041 top.do_ungetc = config_file_ungetc;
2042 top.do_ftell = config_file_ftell;
2043
2044 flockfile(f);
2045 ret = do_config_from(reader, &top, fn, data, opts);
2046 funlockfile(f);
2047 return ret;
2048 }
2049
2050 static int git_config_from_stdin(config_fn_t fn, void *data)
2051 {
2052 return do_config_from_file(&the_reader, fn, CONFIG_ORIGIN_STDIN, "",
2053 NULL, stdin, data, NULL);
2054 }
2055
2056 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
2057 void *data,
2058 const struct config_options *opts)
2059 {
2060 int ret = -1;
2061 FILE *f;
2062
2063 if (!filename)
2064 BUG("filename cannot be NULL");
2065 f = fopen_or_warn(filename, "r");
2066 if (f) {
2067 ret = do_config_from_file(&the_reader, fn, CONFIG_ORIGIN_FILE,
2068 filename, filename, f, data, opts);
2069 fclose(f);
2070 }
2071 return ret;
2072 }
2073
2074 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
2075 {
2076 return git_config_from_file_with_options(fn, filename, data, NULL);
2077 }
2078
2079 int git_config_from_mem(config_fn_t fn,
2080 const enum config_origin_type origin_type,
2081 const char *name, const char *buf, size_t len,
2082 void *data, const struct config_options *opts)
2083 {
2084 struct config_source top = CONFIG_SOURCE_INIT;
2085
2086 top.u.buf.buf = buf;
2087 top.u.buf.len = len;
2088 top.u.buf.pos = 0;
2089 top.origin_type = origin_type;
2090 top.name = name;
2091 top.path = NULL;
2092 top.default_error_action = CONFIG_ERROR_ERROR;
2093 top.do_fgetc = config_buf_fgetc;
2094 top.do_ungetc = config_buf_ungetc;
2095 top.do_ftell = config_buf_ftell;
2096
2097 return do_config_from(&the_reader, &top, fn, data, opts);
2098 }
2099
2100 int git_config_from_blob_oid(config_fn_t fn,
2101 const char *name,
2102 struct repository *repo,
2103 const struct object_id *oid,
2104 void *data)
2105 {
2106 enum object_type type;
2107 char *buf;
2108 unsigned long size;
2109 int ret;
2110
2111 buf = repo_read_object_file(repo, oid, &type, &size);
2112 if (!buf)
2113 return error(_("unable to load config blob object '%s'"), name);
2114 if (type != OBJ_BLOB) {
2115 free(buf);
2116 return error(_("reference '%s' does not point to a blob"), name);
2117 }
2118
2119 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
2120 data, NULL);
2121 free(buf);
2122
2123 return ret;
2124 }
2125
2126 static int git_config_from_blob_ref(config_fn_t fn,
2127 struct repository *repo,
2128 const char *name,
2129 void *data)
2130 {
2131 struct object_id oid;
2132
2133 if (repo_get_oid(repo, name, &oid) < 0)
2134 return error(_("unable to resolve config blob '%s'"), name);
2135 return git_config_from_blob_oid(fn, name, repo, &oid, data);
2136 }
2137
2138 char *git_system_config(void)
2139 {
2140 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
2141 if (!system_config)
2142 system_config = system_path(ETC_GITCONFIG);
2143 normalize_path_copy(system_config, system_config);
2144 return system_config;
2145 }
2146
2147 void git_global_config(char **user_out, char **xdg_out)
2148 {
2149 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
2150 char *xdg_config = NULL;
2151
2152 if (!user_config) {
2153 user_config = interpolate_path("~/.gitconfig", 0);
2154 xdg_config = xdg_config_home("config");
2155 }
2156
2157 *user_out = user_config;
2158 *xdg_out = xdg_config;
2159 }
2160
2161 /*
2162 * Parse environment variable 'k' as a boolean (in various
2163 * possible spellings); if missing, use the default value 'def'.
2164 */
2165 int git_env_bool(const char *k, int def)
2166 {
2167 const char *v = getenv(k);
2168 return v ? git_config_bool(k, v) : def;
2169 }
2170
2171 /*
2172 * Parse environment variable 'k' as ulong with possibly a unit
2173 * suffix; if missing, use the default value 'val'.
2174 */
2175 unsigned long git_env_ulong(const char *k, unsigned long val)
2176 {
2177 const char *v = getenv(k);
2178 if (v && !git_parse_ulong(v, &val))
2179 die(_("failed to parse %s"), k);
2180 return val;
2181 }
2182
2183 int git_config_system(void)
2184 {
2185 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
2186 }
2187
2188 static int do_git_config_sequence(struct config_reader *reader,
2189 const struct config_options *opts,
2190 const struct repository *repo,
2191 config_fn_t fn, void *data)
2192 {
2193 int ret = 0;
2194 char *system_config = git_system_config();
2195 char *xdg_config = NULL;
2196 char *user_config = NULL;
2197 char *repo_config;
2198 char *worktree_config;
2199 enum config_scope prev_parsing_scope = reader->parsing_scope;
2200
2201 /*
2202 * Ensure that either:
2203 * - the git_dir and commondir are both set, or
2204 * - the git_dir and commondir are both NULL
2205 */
2206 if (!opts->git_dir != !opts->commondir)
2207 BUG("only one of commondir and git_dir is non-NULL");
2208
2209 if (opts->commondir) {
2210 repo_config = mkpathdup("%s/config", opts->commondir);
2211 worktree_config = mkpathdup("%s/config.worktree", opts->git_dir);
2212 } else {
2213 repo_config = NULL;
2214 worktree_config = NULL;
2215 }
2216
2217 config_reader_set_scope(reader, CONFIG_SCOPE_SYSTEM);
2218 if (git_config_system() && system_config &&
2219 !access_or_die(system_config, R_OK,
2220 opts->system_gently ? ACCESS_EACCES_OK : 0))
2221 ret += git_config_from_file(fn, system_config, data);
2222
2223 config_reader_set_scope(reader, CONFIG_SCOPE_GLOBAL);
2224 git_global_config(&user_config, &xdg_config);
2225
2226 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
2227 ret += git_config_from_file(fn, xdg_config, data);
2228
2229 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
2230 ret += git_config_from_file(fn, user_config, data);
2231
2232 config_reader_set_scope(reader, CONFIG_SCOPE_LOCAL);
2233 if (!opts->ignore_repo && repo_config &&
2234 !access_or_die(repo_config, R_OK, 0))
2235 ret += git_config_from_file(fn, repo_config, data);
2236
2237 config_reader_set_scope(reader, CONFIG_SCOPE_WORKTREE);
2238 if (!opts->ignore_worktree && worktree_config &&
2239 repo && repo->repository_format_worktree_config &&
2240 !access_or_die(worktree_config, R_OK, 0)) {
2241 ret += git_config_from_file(fn, worktree_config, data);
2242 }
2243
2244 config_reader_set_scope(reader, CONFIG_SCOPE_COMMAND);
2245 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
2246 die(_("unable to parse command-line config"));
2247
2248 config_reader_set_scope(reader, prev_parsing_scope);
2249 free(system_config);
2250 free(xdg_config);
2251 free(user_config);
2252 free(repo_config);
2253 free(worktree_config);
2254 return ret;
2255 }
2256
2257 int config_with_options(config_fn_t fn, void *data,
2258 struct git_config_source *config_source,
2259 struct repository *repo,
2260 const struct config_options *opts)
2261 {
2262 struct config_include_data inc = CONFIG_INCLUDE_INIT;
2263 enum config_scope prev_scope = the_reader.parsing_scope;
2264 int ret;
2265
2266 if (opts->respect_includes) {
2267 inc.fn = fn;
2268 inc.data = data;
2269 inc.opts = opts;
2270 inc.repo = repo;
2271 inc.config_source = config_source;
2272 inc.config_reader = &the_reader;
2273 fn = git_config_include;
2274 data = &inc;
2275 }
2276
2277 if (config_source)
2278 config_reader_set_scope(&the_reader, config_source->scope);
2279
2280 /*
2281 * If we have a specific filename, use it. Otherwise, follow the
2282 * regular lookup sequence.
2283 */
2284 if (config_source && config_source->use_stdin) {
2285 ret = git_config_from_stdin(fn, data);
2286 } else if (config_source && config_source->file) {
2287 ret = git_config_from_file(fn, config_source->file, data);
2288 } else if (config_source && config_source->blob) {
2289 ret = git_config_from_blob_ref(fn, repo, config_source->blob,
2290 data);
2291 } else {
2292 ret = do_git_config_sequence(&the_reader, opts, repo, fn, data);
2293 }
2294
2295 if (inc.remote_urls) {
2296 string_list_clear(inc.remote_urls, 0);
2297 FREE_AND_NULL(inc.remote_urls);
2298 }
2299 config_reader_set_scope(&the_reader, prev_scope);
2300 return ret;
2301 }
2302
2303 static void configset_iter(struct config_reader *reader, struct config_set *set,
2304 config_fn_t fn, void *data)
2305 {
2306 int i, value_index;
2307 struct string_list *values;
2308 struct config_set_element *entry;
2309 struct configset_list *list = &set->list;
2310
2311 for (i = 0; i < list->nr; i++) {
2312 entry = list->items[i].e;
2313 value_index = list->items[i].value_index;
2314 values = &entry->value_list;
2315
2316 config_reader_set_kvi(reader, values->items[value_index].util);
2317
2318 if (fn(entry->key, values->items[value_index].string, data) < 0)
2319 git_die_config_linenr(entry->key,
2320 reader->config_kvi->filename,
2321 reader->config_kvi->linenr);
2322
2323 config_reader_set_kvi(reader, NULL);
2324 }
2325 }
2326
2327 void read_early_config(config_fn_t cb, void *data)
2328 {
2329 struct config_options opts = {0};
2330 struct strbuf commondir = STRBUF_INIT;
2331 struct strbuf gitdir = STRBUF_INIT;
2332
2333 opts.respect_includes = 1;
2334
2335 if (have_git_dir()) {
2336 opts.commondir = get_git_common_dir();
2337 opts.git_dir = get_git_dir();
2338 /*
2339 * When setup_git_directory() was not yet asked to discover the
2340 * GIT_DIR, we ask discover_git_directory() to figure out whether there
2341 * is any repository config we should use (but unlike
2342 * setup_git_directory_gently(), no global state is changed, most
2343 * notably, the current working directory is still the same after the
2344 * call).
2345 */
2346 } else if (!discover_git_directory(&commondir, &gitdir)) {
2347 opts.commondir = commondir.buf;
2348 opts.git_dir = gitdir.buf;
2349 }
2350
2351 config_with_options(cb, data, NULL, NULL, &opts);
2352
2353 strbuf_release(&commondir);
2354 strbuf_release(&gitdir);
2355 }
2356
2357 /*
2358 * Read config but only enumerate system and global settings.
2359 * Omit any repo-local, worktree-local, or command-line settings.
2360 */
2361 void read_very_early_config(config_fn_t cb, void *data)
2362 {
2363 struct config_options opts = { 0 };
2364
2365 opts.respect_includes = 1;
2366 opts.ignore_repo = 1;
2367 opts.ignore_worktree = 1;
2368 opts.ignore_cmdline = 1;
2369 opts.system_gently = 1;
2370
2371 config_with_options(cb, data, NULL, NULL, &opts);
2372 }
2373
2374 RESULT_MUST_BE_USED
2375 static int configset_find_element(struct config_set *set, const char *key,
2376 struct config_set_element **dest)
2377 {
2378 struct config_set_element k;
2379 struct config_set_element *found_entry;
2380 char *normalized_key;
2381 int ret;
2382
2383 /*
2384 * `key` may come from the user, so normalize it before using it
2385 * for querying entries from the hashmap.
2386 */
2387 ret = git_config_parse_key(key, &normalized_key, NULL);
2388 if (ret)
2389 return ret;
2390
2391 hashmap_entry_init(&k.ent, strhash(normalized_key));
2392 k.key = normalized_key;
2393 found_entry = hashmap_get_entry(&set->config_hash, &k, ent, NULL);
2394 free(normalized_key);
2395 *dest = found_entry;
2396 return 0;
2397 }
2398
2399 static int configset_add_value(struct config_reader *reader,
2400 struct config_set *set, const char *key,
2401 const char *value)
2402 {
2403 struct config_set_element *e;
2404 struct string_list_item *si;
2405 struct configset_list_item *l_item;
2406 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
2407 int ret;
2408
2409 ret = configset_find_element(set, key, &e);
2410 if (ret)
2411 return ret;
2412 /*
2413 * Since the keys are being fed by git_config*() callback mechanism, they
2414 * are already normalized. So simply add them without any further munging.
2415 */
2416 if (!e) {
2417 e = xmalloc(sizeof(*e));
2418 hashmap_entry_init(&e->ent, strhash(key));
2419 e->key = xstrdup(key);
2420 string_list_init_dup(&e->value_list);
2421 hashmap_add(&set->config_hash, &e->ent);
2422 }
2423 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
2424
2425 ALLOC_GROW(set->list.items, set->list.nr + 1, set->list.alloc);
2426 l_item = &set->list.items[set->list.nr++];
2427 l_item->e = e;
2428 l_item->value_index = e->value_list.nr - 1;
2429
2430 if (!reader->source)
2431 BUG("configset_add_value has no source");
2432 if (reader->source->name) {
2433 kv_info->filename = strintern(reader->source->name);
2434 kv_info->linenr = reader->source->linenr;
2435 kv_info->origin_type = reader->source->origin_type;
2436 } else {
2437 /* for values read from `git_config_from_parameters()` */
2438 kv_info->filename = NULL;
2439 kv_info->linenr = -1;
2440 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
2441 }
2442 kv_info->scope = reader->parsing_scope;
2443 si->util = kv_info;
2444
2445 return 0;
2446 }
2447
2448 static int config_set_element_cmp(const void *cmp_data UNUSED,
2449 const struct hashmap_entry *eptr,
2450 const struct hashmap_entry *entry_or_key,
2451 const void *keydata UNUSED)
2452 {
2453 const struct config_set_element *e1, *e2;
2454
2455 e1 = container_of(eptr, const struct config_set_element, ent);
2456 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2457
2458 return strcmp(e1->key, e2->key);
2459 }
2460
2461 void git_configset_init(struct config_set *set)
2462 {
2463 hashmap_init(&set->config_hash, config_set_element_cmp, NULL, 0);
2464 set->hash_initialized = 1;
2465 set->list.nr = 0;
2466 set->list.alloc = 0;
2467 set->list.items = NULL;
2468 }
2469
2470 void git_configset_clear(struct config_set *set)
2471 {
2472 struct config_set_element *entry;
2473 struct hashmap_iter iter;
2474 if (!set->hash_initialized)
2475 return;
2476
2477 hashmap_for_each_entry(&set->config_hash, &iter, entry,
2478 ent /* member name */) {
2479 free(entry->key);
2480 string_list_clear(&entry->value_list, 1);
2481 }
2482 hashmap_clear_and_free(&set->config_hash, struct config_set_element, ent);
2483 set->hash_initialized = 0;
2484 free(set->list.items);
2485 set->list.nr = 0;
2486 set->list.alloc = 0;
2487 set->list.items = NULL;
2488 }
2489
2490 struct configset_add_data {
2491 struct config_set *config_set;
2492 struct config_reader *config_reader;
2493 };
2494 #define CONFIGSET_ADD_INIT { 0 }
2495
2496 static int config_set_callback(const char *key, const char *value, void *cb)
2497 {
2498 struct configset_add_data *data = cb;
2499 configset_add_value(data->config_reader, data->config_set, key, value);
2500 return 0;
2501 }
2502
2503 int git_configset_add_file(struct config_set *set, const char *filename)
2504 {
2505 struct configset_add_data data = CONFIGSET_ADD_INIT;
2506 data.config_reader = &the_reader;
2507 data.config_set = set;
2508 return git_config_from_file(config_set_callback, filename, &data);
2509 }
2510
2511 int git_configset_get_value(struct config_set *set, const char *key, const char **value)
2512 {
2513 const struct string_list *values = NULL;
2514 int ret;
2515
2516 /*
2517 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2518 * queried key in the files of the configset, the value returned will be the last
2519 * value in the value list for that key.
2520 */
2521 if ((ret = git_configset_get_value_multi(set, key, &values)))
2522 return ret;
2523
2524 assert(values->nr > 0);
2525 *value = values->items[values->nr - 1].string;
2526 return 0;
2527 }
2528
2529 int git_configset_get_value_multi(struct config_set *set, const char *key,
2530 const struct string_list **dest)
2531 {
2532 struct config_set_element *e;
2533 int ret;
2534
2535 if ((ret = configset_find_element(set, key, &e)))
2536 return ret;
2537 else if (!e)
2538 return 1;
2539 *dest = &e->value_list;
2540
2541 return 0;
2542 }
2543
2544 static int check_multi_string(struct string_list_item *item, void *util)
2545 {
2546 return item->string ? 0 : config_error_nonbool(util);
2547 }
2548
2549 int git_configset_get_string_multi(struct config_set *cs, const char *key,
2550 const struct string_list **dest)
2551 {
2552 int ret;
2553
2554 if ((ret = git_configset_get_value_multi(cs, key, dest)))
2555 return ret;
2556 if ((ret = for_each_string_list((struct string_list *)*dest,
2557 check_multi_string, (void *)key)))
2558 return ret;
2559
2560 return 0;
2561 }
2562
2563 int git_configset_get(struct config_set *set, const char *key)
2564 {
2565 struct config_set_element *e;
2566 int ret;
2567
2568 if ((ret = configset_find_element(set, key, &e)))
2569 return ret;
2570 else if (!e)
2571 return 1;
2572 return 0;
2573 }
2574
2575 int git_configset_get_string(struct config_set *set, const char *key, char **dest)
2576 {
2577 const char *value;
2578 if (!git_configset_get_value(set, key, &value))
2579 return git_config_string((const char **)dest, key, value);
2580 else
2581 return 1;
2582 }
2583
2584 static int git_configset_get_string_tmp(struct config_set *set, const char *key,
2585 const char **dest)
2586 {
2587 const char *value;
2588 if (!git_configset_get_value(set, key, &value)) {
2589 if (!value)
2590 return config_error_nonbool(key);
2591 *dest = value;
2592 return 0;
2593 } else {
2594 return 1;
2595 }
2596 }
2597
2598 int git_configset_get_int(struct config_set *set, const char *key, int *dest)
2599 {
2600 const char *value;
2601 if (!git_configset_get_value(set, key, &value)) {
2602 *dest = git_config_int(key, value);
2603 return 0;
2604 } else
2605 return 1;
2606 }
2607
2608 int git_configset_get_ulong(struct config_set *set, const char *key, unsigned long *dest)
2609 {
2610 const char *value;
2611 if (!git_configset_get_value(set, key, &value)) {
2612 *dest = git_config_ulong(key, value);
2613 return 0;
2614 } else
2615 return 1;
2616 }
2617
2618 int git_configset_get_bool(struct config_set *set, const char *key, int *dest)
2619 {
2620 const char *value;
2621 if (!git_configset_get_value(set, key, &value)) {
2622 *dest = git_config_bool(key, value);
2623 return 0;
2624 } else
2625 return 1;
2626 }
2627
2628 int git_configset_get_bool_or_int(struct config_set *set, const char *key,
2629 int *is_bool, int *dest)
2630 {
2631 const char *value;
2632 if (!git_configset_get_value(set, key, &value)) {
2633 *dest = git_config_bool_or_int(key, value, is_bool);
2634 return 0;
2635 } else
2636 return 1;
2637 }
2638
2639 int git_configset_get_maybe_bool(struct config_set *set, const char *key, int *dest)
2640 {
2641 const char *value;
2642 if (!git_configset_get_value(set, key, &value)) {
2643 *dest = git_parse_maybe_bool(value);
2644 if (*dest == -1)
2645 return -1;
2646 return 0;
2647 } else
2648 return 1;
2649 }
2650
2651 int git_configset_get_pathname(struct config_set *set, const char *key, const char **dest)
2652 {
2653 const char *value;
2654 if (!git_configset_get_value(set, key, &value))
2655 return git_config_pathname(dest, key, value);
2656 else
2657 return 1;
2658 }
2659
2660 /* Functions use to read configuration from a repository */
2661 static void repo_read_config(struct repository *repo)
2662 {
2663 struct config_options opts = { 0 };
2664 struct configset_add_data data = CONFIGSET_ADD_INIT;
2665
2666 opts.respect_includes = 1;
2667 opts.commondir = repo->commondir;
2668 opts.git_dir = repo->gitdir;
2669
2670 if (!repo->config)
2671 CALLOC_ARRAY(repo->config, 1);
2672 else
2673 git_configset_clear(repo->config);
2674
2675 git_configset_init(repo->config);
2676 data.config_set = repo->config;
2677 data.config_reader = &the_reader;
2678
2679 if (config_with_options(config_set_callback, &data, NULL, repo, &opts) < 0)
2680 /*
2681 * config_with_options() normally returns only
2682 * zero, as most errors are fatal, and
2683 * non-fatal potential errors are guarded by "if"
2684 * statements that are entered only when no error is
2685 * possible.
2686 *
2687 * If we ever encounter a non-fatal error, it means
2688 * something went really wrong and we should stop
2689 * immediately.
2690 */
2691 die(_("unknown error occurred while reading the configuration files"));
2692 }
2693
2694 static void git_config_check_init(struct repository *repo)
2695 {
2696 if (repo->config && repo->config->hash_initialized)
2697 return;
2698 repo_read_config(repo);
2699 }
2700
2701 static void repo_config_clear(struct repository *repo)
2702 {
2703 if (!repo->config || !repo->config->hash_initialized)
2704 return;
2705 git_configset_clear(repo->config);
2706 }
2707
2708 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2709 {
2710 git_config_check_init(repo);
2711 configset_iter(&the_reader, repo->config, fn, data);
2712 }
2713
2714 int repo_config_get(struct repository *repo, const char *key)
2715 {
2716 git_config_check_init(repo);
2717 return git_configset_get(repo->config, key);
2718 }
2719
2720 int repo_config_get_value(struct repository *repo,
2721 const char *key, const char **value)
2722 {
2723 git_config_check_init(repo);
2724 return git_configset_get_value(repo->config, key, value);
2725 }
2726
2727 int repo_config_get_value_multi(struct repository *repo, const char *key,
2728 const struct string_list **dest)
2729 {
2730 git_config_check_init(repo);
2731 return git_configset_get_value_multi(repo->config, key, dest);
2732 }
2733
2734 int repo_config_get_string_multi(struct repository *repo, const char *key,
2735 const struct string_list **dest)
2736 {
2737 git_config_check_init(repo);
2738 return git_configset_get_string_multi(repo->config, key, dest);
2739 }
2740
2741 int repo_config_get_string(struct repository *repo,
2742 const char *key, char **dest)
2743 {
2744 int ret;
2745 git_config_check_init(repo);
2746 ret = git_configset_get_string(repo->config, key, dest);
2747 if (ret < 0)
2748 git_die_config(key, NULL);
2749 return ret;
2750 }
2751
2752 int repo_config_get_string_tmp(struct repository *repo,
2753 const char *key, const char **dest)
2754 {
2755 int ret;
2756 git_config_check_init(repo);
2757 ret = git_configset_get_string_tmp(repo->config, key, dest);
2758 if (ret < 0)
2759 git_die_config(key, NULL);
2760 return ret;
2761 }
2762
2763 int repo_config_get_int(struct repository *repo,
2764 const char *key, int *dest)
2765 {
2766 git_config_check_init(repo);
2767 return git_configset_get_int(repo->config, key, dest);
2768 }
2769
2770 int repo_config_get_ulong(struct repository *repo,
2771 const char *key, unsigned long *dest)
2772 {
2773 git_config_check_init(repo);
2774 return git_configset_get_ulong(repo->config, key, dest);
2775 }
2776
2777 int repo_config_get_bool(struct repository *repo,
2778 const char *key, int *dest)
2779 {
2780 git_config_check_init(repo);
2781 return git_configset_get_bool(repo->config, key, dest);
2782 }
2783
2784 int repo_config_get_bool_or_int(struct repository *repo,
2785 const char *key, int *is_bool, int *dest)
2786 {
2787 git_config_check_init(repo);
2788 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2789 }
2790
2791 int repo_config_get_maybe_bool(struct repository *repo,
2792 const char *key, int *dest)
2793 {
2794 git_config_check_init(repo);
2795 return git_configset_get_maybe_bool(repo->config, key, dest);
2796 }
2797
2798 int repo_config_get_pathname(struct repository *repo,
2799 const char *key, const char **dest)
2800 {
2801 int ret;
2802 git_config_check_init(repo);
2803 ret = git_configset_get_pathname(repo->config, key, dest);
2804 if (ret < 0)
2805 git_die_config(key, NULL);
2806 return ret;
2807 }
2808
2809 /* Read values into protected_config. */
2810 static void read_protected_config(void)
2811 {
2812 struct config_options opts = {
2813 .respect_includes = 1,
2814 .ignore_repo = 1,
2815 .ignore_worktree = 1,
2816 .system_gently = 1,
2817 };
2818 struct configset_add_data data = CONFIGSET_ADD_INIT;
2819
2820 git_configset_init(&protected_config);
2821 data.config_set = &protected_config;
2822 data.config_reader = &the_reader;
2823 config_with_options(config_set_callback, &data, NULL, NULL, &opts);
2824 }
2825
2826 void git_protected_config(config_fn_t fn, void *data)
2827 {
2828 if (!protected_config.hash_initialized)
2829 read_protected_config();
2830 configset_iter(&the_reader, &protected_config, fn, data);
2831 }
2832
2833 /* Functions used historically to read configuration from 'the_repository' */
2834 void git_config(config_fn_t fn, void *data)
2835 {
2836 repo_config(the_repository, fn, data);
2837 }
2838
2839 void git_config_clear(void)
2840 {
2841 repo_config_clear(the_repository);
2842 }
2843
2844 int git_config_get(const char *key)
2845 {
2846 return repo_config_get(the_repository, key);
2847 }
2848
2849 int git_config_get_value(const char *key, const char **value)
2850 {
2851 return repo_config_get_value(the_repository, key, value);
2852 }
2853
2854 int git_config_get_value_multi(const char *key, const struct string_list **dest)
2855 {
2856 return repo_config_get_value_multi(the_repository, key, dest);
2857 }
2858
2859 int git_config_get_string_multi(const char *key,
2860 const struct string_list **dest)
2861 {
2862 return repo_config_get_string_multi(the_repository, key, dest);
2863 }
2864
2865 int git_config_get_string(const char *key, char **dest)
2866 {
2867 return repo_config_get_string(the_repository, key, dest);
2868 }
2869
2870 int git_config_get_string_tmp(const char *key, const char **dest)
2871 {
2872 return repo_config_get_string_tmp(the_repository, key, dest);
2873 }
2874
2875 int git_config_get_int(const char *key, int *dest)
2876 {
2877 return repo_config_get_int(the_repository, key, dest);
2878 }
2879
2880 int git_config_get_ulong(const char *key, unsigned long *dest)
2881 {
2882 return repo_config_get_ulong(the_repository, key, dest);
2883 }
2884
2885 int git_config_get_bool(const char *key, int *dest)
2886 {
2887 return repo_config_get_bool(the_repository, key, dest);
2888 }
2889
2890 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2891 {
2892 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2893 }
2894
2895 int git_config_get_maybe_bool(const char *key, int *dest)
2896 {
2897 return repo_config_get_maybe_bool(the_repository, key, dest);
2898 }
2899
2900 int git_config_get_pathname(const char *key, const char **dest)
2901 {
2902 return repo_config_get_pathname(the_repository, key, dest);
2903 }
2904
2905 int git_config_get_expiry(const char *key, const char **output)
2906 {
2907 int ret = git_config_get_string(key, (char **)output);
2908 if (ret)
2909 return ret;
2910 if (strcmp(*output, "now")) {
2911 timestamp_t now = approxidate("now");
2912 if (approxidate(*output) >= now)
2913 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2914 }
2915 return ret;
2916 }
2917
2918 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2919 {
2920 const char *expiry_string;
2921 intmax_t days;
2922 timestamp_t when;
2923
2924 if (git_config_get_string_tmp(key, &expiry_string))
2925 return 1; /* no such thing */
2926
2927 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2928 const int scale = 86400;
2929 *expiry = now - days * scale;
2930 return 0;
2931 }
2932
2933 if (!parse_expiry_date(expiry_string, &when)) {
2934 *expiry = when;
2935 return 0;
2936 }
2937 return -1; /* thing exists but cannot be parsed */
2938 }
2939
2940 int git_config_get_split_index(void)
2941 {
2942 int val;
2943
2944 if (!git_config_get_maybe_bool("core.splitindex", &val))
2945 return val;
2946
2947 return -1; /* default value */
2948 }
2949
2950 int git_config_get_max_percent_split_change(void)
2951 {
2952 int val = -1;
2953
2954 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2955 if (0 <= val && val <= 100)
2956 return val;
2957
2958 return error(_("splitIndex.maxPercentChange value '%d' "
2959 "should be between 0 and 100"), val);
2960 }
2961
2962 return -1; /* default value */
2963 }
2964
2965 int git_config_get_index_threads(int *dest)
2966 {
2967 int is_bool, val;
2968
2969 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2970 if (val) {
2971 *dest = val;
2972 return 0;
2973 }
2974
2975 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2976 if (is_bool)
2977 *dest = val ? 0 : 1;
2978 else
2979 *dest = val;
2980 return 0;
2981 }
2982
2983 return 1;
2984 }
2985
2986 NORETURN
2987 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2988 {
2989 if (!filename)
2990 die(_("unable to parse '%s' from command-line config"), key);
2991 else
2992 die(_("bad config variable '%s' in file '%s' at line %d"),
2993 key, filename, linenr);
2994 }
2995
2996 NORETURN __attribute__((format(printf, 2, 3)))
2997 void git_die_config(const char *key, const char *err, ...)
2998 {
2999 const struct string_list *values;
3000 struct key_value_info *kv_info;
3001 report_fn error_fn = get_error_routine();
3002
3003 if (err) {
3004 va_list params;
3005 va_start(params, err);
3006 error_fn(err, params);
3007 va_end(params);
3008 }
3009 if (git_config_get_value_multi(key, &values))
3010 BUG("for key '%s' we must have a value to report on", key);
3011 kv_info = values->items[values->nr - 1].util;
3012 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
3013 }
3014
3015 /*
3016 * Find all the stuff for git_config_set() below.
3017 */
3018
3019 struct config_store_data {
3020 struct config_reader *config_reader;
3021 size_t baselen;
3022 char *key;
3023 int do_not_match;
3024 const char *fixed_value;
3025 regex_t *value_pattern;
3026 int multi_replace;
3027 struct {
3028 size_t begin, end;
3029 enum config_event_t type;
3030 int is_keys_section;
3031 } *parsed;
3032 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
3033 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
3034 };
3035 #define CONFIG_STORE_INIT { 0 }
3036
3037 static void config_store_data_clear(struct config_store_data *store)
3038 {
3039 free(store->key);
3040 if (store->value_pattern != NULL &&
3041 store->value_pattern != CONFIG_REGEX_NONE) {
3042 regfree(store->value_pattern);
3043 free(store->value_pattern);
3044 }
3045 free(store->parsed);
3046 free(store->seen);
3047 memset(store, 0, sizeof(*store));
3048 }
3049
3050 static int matches(const char *key, const char *value,
3051 const struct config_store_data *store)
3052 {
3053 if (strcmp(key, store->key))
3054 return 0; /* not ours */
3055 if (store->fixed_value)
3056 return !strcmp(store->fixed_value, value);
3057 if (!store->value_pattern)
3058 return 1; /* always matches */
3059 if (store->value_pattern == CONFIG_REGEX_NONE)
3060 return 0; /* never matches */
3061
3062 return store->do_not_match ^
3063 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
3064 }
3065
3066 static int store_aux_event(enum config_event_t type,
3067 size_t begin, size_t end, void *data)
3068 {
3069 struct config_store_data *store = data;
3070 struct config_source *cs = store->config_reader->source;
3071
3072 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
3073 store->parsed[store->parsed_nr].begin = begin;
3074 store->parsed[store->parsed_nr].end = end;
3075 store->parsed[store->parsed_nr].type = type;
3076
3077 if (type == CONFIG_EVENT_SECTION) {
3078 int (*cmpfn)(const char *, const char *, size_t);
3079
3080 if (cs->var.len < 2 || cs->var.buf[cs->var.len - 1] != '.')
3081 return error(_("invalid section name '%s'"), cs->var.buf);
3082
3083 if (cs->subsection_case_sensitive)
3084 cmpfn = strncasecmp;
3085 else
3086 cmpfn = strncmp;
3087
3088 /* Is this the section we were looking for? */
3089 store->is_keys_section =
3090 store->parsed[store->parsed_nr].is_keys_section =
3091 cs->var.len - 1 == store->baselen &&
3092 !cmpfn(cs->var.buf, store->key, store->baselen);
3093 if (store->is_keys_section) {
3094 store->section_seen = 1;
3095 ALLOC_GROW(store->seen, store->seen_nr + 1,
3096 store->seen_alloc);
3097 store->seen[store->seen_nr] = store->parsed_nr;
3098 }
3099 }
3100
3101 store->parsed_nr++;
3102
3103 return 0;
3104 }
3105
3106 static int store_aux(const char *key, const char *value, void *cb)
3107 {
3108 struct config_store_data *store = cb;
3109
3110 if (store->key_seen) {
3111 if (matches(key, value, store)) {
3112 if (store->seen_nr == 1 && store->multi_replace == 0) {
3113 warning(_("%s has multiple values"), key);
3114 }
3115
3116 ALLOC_GROW(store->seen, store->seen_nr + 1,
3117 store->seen_alloc);
3118
3119 store->seen[store->seen_nr] = store->parsed_nr;
3120 store->seen_nr++;
3121 }
3122 } else if (store->is_keys_section) {
3123 /*
3124 * Do not increment matches yet: this may not be a match, but we
3125 * are in the desired section.
3126 */
3127 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
3128 store->seen[store->seen_nr] = store->parsed_nr;
3129 store->section_seen = 1;
3130
3131 if (matches(key, value, store)) {
3132 store->seen_nr++;
3133 store->key_seen = 1;
3134 }
3135 }
3136
3137 return 0;
3138 }
3139
3140 static int write_error(const char *filename)
3141 {
3142 error(_("failed to write new configuration file %s"), filename);
3143
3144 /* Same error code as "failed to rename". */
3145 return 4;
3146 }
3147
3148 static struct strbuf store_create_section(const char *key,
3149 const struct config_store_data *store)
3150 {
3151 const char *dot;
3152 size_t i;
3153 struct strbuf sb = STRBUF_INIT;
3154
3155 dot = memchr(key, '.', store->baselen);
3156 if (dot) {
3157 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
3158 for (i = dot - key + 1; i < store->baselen; i++) {
3159 if (key[i] == '"' || key[i] == '\\')
3160 strbuf_addch(&sb, '\\');
3161 strbuf_addch(&sb, key[i]);
3162 }
3163 strbuf_addstr(&sb, "\"]\n");
3164 } else {
3165 strbuf_addch(&sb, '[');
3166 strbuf_add(&sb, key, store->baselen);
3167 strbuf_addstr(&sb, "]\n");
3168 }
3169
3170 return sb;
3171 }
3172
3173 static ssize_t write_section(int fd, const char *key,
3174 const struct config_store_data *store)
3175 {
3176 struct strbuf sb = store_create_section(key, store);
3177 ssize_t ret;
3178
3179 ret = write_in_full(fd, sb.buf, sb.len);
3180 strbuf_release(&sb);
3181
3182 return ret;
3183 }
3184
3185 static ssize_t write_pair(int fd, const char *key, const char *value,
3186 const struct config_store_data *store)
3187 {
3188 int i;
3189 ssize_t ret;
3190 const char *quote = "";
3191 struct strbuf sb = STRBUF_INIT;
3192
3193 /*
3194 * Check to see if the value needs to be surrounded with a dq pair.
3195 * Note that problematic characters are always backslash-quoted; this
3196 * check is about not losing leading or trailing SP and strings that
3197 * follow beginning-of-comment characters (i.e. ';' and '#') by the
3198 * configuration parser.
3199 */
3200 if (value[0] == ' ')
3201 quote = "\"";
3202 for (i = 0; value[i]; i++)
3203 if (value[i] == ';' || value[i] == '#')
3204 quote = "\"";
3205 if (i && value[i - 1] == ' ')
3206 quote = "\"";
3207
3208 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
3209
3210 for (i = 0; value[i]; i++)
3211 switch (value[i]) {
3212 case '\n':
3213 strbuf_addstr(&sb, "\\n");
3214 break;
3215 case '\t':
3216 strbuf_addstr(&sb, "\\t");
3217 break;
3218 case '"':
3219 case '\\':
3220 strbuf_addch(&sb, '\\');
3221 /* fallthrough */
3222 default:
3223 strbuf_addch(&sb, value[i]);
3224 break;
3225 }
3226 strbuf_addf(&sb, "%s\n", quote);
3227
3228 ret = write_in_full(fd, sb.buf, sb.len);
3229 strbuf_release(&sb);
3230
3231 return ret;
3232 }
3233
3234 /*
3235 * If we are about to unset the last key(s) in a section, and if there are
3236 * no comments surrounding (or included in) the section, we will want to
3237 * extend begin/end to remove the entire section.
3238 *
3239 * Note: the parameter `seen_ptr` points to the index into the store.seen
3240 * array. * This index may be incremented if a section has more than one
3241 * entry (which all are to be removed).
3242 */
3243 static void maybe_remove_section(struct config_store_data *store,
3244 size_t *begin_offset, size_t *end_offset,
3245 int *seen_ptr)
3246 {
3247 size_t begin;
3248 int i, seen, section_seen = 0;
3249
3250 /*
3251 * First, ensure that this is the first key, and that there are no
3252 * comments before the entry nor before the section header.
3253 */
3254 seen = *seen_ptr;
3255 for (i = store->seen[seen]; i > 0; i--) {
3256 enum config_event_t type = store->parsed[i - 1].type;
3257
3258 if (type == CONFIG_EVENT_COMMENT)
3259 /* There is a comment before this entry or section */
3260 return;
3261 if (type == CONFIG_EVENT_ENTRY) {
3262 if (!section_seen)
3263 /* This is not the section's first entry. */
3264 return;
3265 /* We encountered no comment before the section. */
3266 break;
3267 }
3268 if (type == CONFIG_EVENT_SECTION) {
3269 if (!store->parsed[i - 1].is_keys_section)
3270 break;
3271 section_seen = 1;
3272 }
3273 }
3274 begin = store->parsed[i].begin;
3275
3276 /*
3277 * Next, make sure that we are removing the last key(s) in the section,
3278 * and that there are no comments that are possibly about the current
3279 * section.
3280 */
3281 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
3282 enum config_event_t type = store->parsed[i].type;
3283
3284 if (type == CONFIG_EVENT_COMMENT)
3285 return;
3286 if (type == CONFIG_EVENT_SECTION) {
3287 if (store->parsed[i].is_keys_section)
3288 continue;
3289 break;
3290 }
3291 if (type == CONFIG_EVENT_ENTRY) {
3292 if (++seen < store->seen_nr &&
3293 i == store->seen[seen])
3294 /* We want to remove this entry, too */
3295 continue;
3296 /* There is another entry in this section. */
3297 return;
3298 }
3299 }
3300
3301 /*
3302 * We are really removing the last entry/entries from this section, and
3303 * there are no enclosed or surrounding comments. Remove the entire,
3304 * now-empty section.
3305 */
3306 *seen_ptr = seen;
3307 *begin_offset = begin;
3308 if (i < store->parsed_nr)
3309 *end_offset = store->parsed[i].begin;
3310 else
3311 *end_offset = store->parsed[store->parsed_nr - 1].end;
3312 }
3313
3314 int git_config_set_in_file_gently(const char *config_filename,
3315 const char *key, const char *value)
3316 {
3317 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
3318 }
3319
3320 void git_config_set_in_file(const char *config_filename,
3321 const char *key, const char *value)
3322 {
3323 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
3324 }
3325
3326 int git_config_set_gently(const char *key, const char *value)
3327 {
3328 return git_config_set_multivar_gently(key, value, NULL, 0);
3329 }
3330
3331 int repo_config_set_worktree_gently(struct repository *r,
3332 const char *key, const char *value)
3333 {
3334 /* Only use worktree-specific config if it is already enabled. */
3335 if (r->repository_format_worktree_config) {
3336 char *file = repo_git_path(r, "config.worktree");
3337 int ret = git_config_set_multivar_in_file_gently(
3338 file, key, value, NULL, 0);
3339 free(file);
3340 return ret;
3341 }
3342 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3343 }
3344
3345 void git_config_set(const char *key, const char *value)
3346 {
3347 git_config_set_multivar(key, value, NULL, 0);
3348
3349 trace2_cmd_set_config(key, value);
3350 }
3351
3352 /*
3353 * If value==NULL, unset in (remove from) config,
3354 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
3355 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
3356 * (only add a new one)
3357 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
3358 * key/values are removed before a single new pair is written. If the
3359 * flag is not present, then replace only the first match.
3360 *
3361 * Returns 0 on success.
3362 *
3363 * This function does this:
3364 *
3365 * - it locks the config file by creating ".git/config.lock"
3366 *
3367 * - it then parses the config using store_aux() as validator to find
3368 * the position on the key/value pair to replace. If it is to be unset,
3369 * it must be found exactly once.
3370 *
3371 * - the config file is mmap()ed and the part before the match (if any) is
3372 * written to the lock file, then the changed part and the rest.
3373 *
3374 * - the config file is removed and the lock file rename()d to it.
3375 *
3376 */
3377 int git_config_set_multivar_in_file_gently(const char *config_filename,
3378 const char *key, const char *value,
3379 const char *value_pattern,
3380 unsigned flags)
3381 {
3382 int fd = -1, in_fd = -1;
3383 int ret;
3384 struct lock_file lock = LOCK_INIT;
3385 char *filename_buf = NULL;
3386 char *contents = NULL;
3387 size_t contents_sz;
3388 struct config_store_data store = CONFIG_STORE_INIT;
3389
3390 store.config_reader = &the_reader;
3391
3392 /* parse-key returns negative; flip the sign to feed exit(3) */
3393 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
3394 if (ret)
3395 goto out_free;
3396
3397 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
3398
3399 if (!config_filename)
3400 config_filename = filename_buf = git_pathdup("config");
3401
3402 /*
3403 * The lock serves a purpose in addition to locking: the new
3404 * contents of .git/config will be written into it.
3405 */
3406 fd = hold_lock_file_for_update(&lock, config_filename, 0);
3407 if (fd < 0) {
3408 error_errno(_("could not lock config file %s"), config_filename);
3409 ret = CONFIG_NO_LOCK;
3410 goto out_free;
3411 }
3412
3413 /*
3414 * If .git/config does not exist yet, write a minimal version.
3415 */
3416 in_fd = open(config_filename, O_RDONLY);
3417 if ( in_fd < 0 ) {
3418 if ( ENOENT != errno ) {
3419 error_errno(_("opening %s"), config_filename);
3420 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
3421 goto out_free;
3422 }
3423 /* if nothing to unset, error out */
3424 if (!value) {
3425 ret = CONFIG_NOTHING_SET;
3426 goto out_free;
3427 }
3428
3429 free(store.key);
3430 store.key = xstrdup(key);
3431 if (write_section(fd, key, &store) < 0 ||
3432 write_pair(fd, key, value, &store) < 0)
3433 goto write_err_out;
3434 } else {
3435 struct stat st;
3436 size_t copy_begin, copy_end;
3437 int i, new_line = 0;
3438 struct config_options opts;
3439
3440 if (!value_pattern)
3441 store.value_pattern = NULL;
3442 else if (value_pattern == CONFIG_REGEX_NONE)
3443 store.value_pattern = CONFIG_REGEX_NONE;
3444 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
3445 store.fixed_value = value_pattern;
3446 else {
3447 if (value_pattern[0] == '!') {
3448 store.do_not_match = 1;
3449 value_pattern++;
3450 } else
3451 store.do_not_match = 0;
3452
3453 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3454 if (regcomp(store.value_pattern, value_pattern,
3455 REG_EXTENDED)) {
3456 error(_("invalid pattern: %s"), value_pattern);
3457 FREE_AND_NULL(store.value_pattern);
3458 ret = CONFIG_INVALID_PATTERN;
3459 goto out_free;
3460 }
3461 }
3462
3463 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3464 store.parsed[0].end = 0;
3465
3466 memset(&opts, 0, sizeof(opts));
3467 opts.event_fn = store_aux_event;
3468 opts.event_fn_data = &store;
3469
3470 /*
3471 * After this, store.parsed will contain offsets of all the
3472 * parsed elements, and store.seen will contain a list of
3473 * matches, as indices into store.parsed.
3474 *
3475 * As a side effect, we make sure to transform only a valid
3476 * existing config file.
3477 */
3478 if (git_config_from_file_with_options(store_aux,
3479 config_filename,
3480 &store, &opts)) {
3481 error(_("invalid config file %s"), config_filename);
3482 ret = CONFIG_INVALID_FILE;
3483 goto out_free;
3484 }
3485
3486 /* if nothing to unset, or too many matches, error out */
3487 if ((store.seen_nr == 0 && value == NULL) ||
3488 (store.seen_nr > 1 && !store.multi_replace)) {
3489 ret = CONFIG_NOTHING_SET;
3490 goto out_free;
3491 }
3492
3493 if (fstat(in_fd, &st) == -1) {
3494 error_errno(_("fstat on %s failed"), config_filename);
3495 ret = CONFIG_INVALID_FILE;
3496 goto out_free;
3497 }
3498
3499 contents_sz = xsize_t(st.st_size);
3500 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3501 MAP_PRIVATE, in_fd, 0);
3502 if (contents == MAP_FAILED) {
3503 if (errno == ENODEV && S_ISDIR(st.st_mode))
3504 errno = EISDIR;
3505 error_errno(_("unable to mmap '%s'%s"),
3506 config_filename, mmap_os_err());
3507 ret = CONFIG_INVALID_FILE;
3508 contents = NULL;
3509 goto out_free;
3510 }
3511 close(in_fd);
3512 in_fd = -1;
3513
3514 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3515 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3516 ret = CONFIG_NO_WRITE;
3517 goto out_free;
3518 }
3519
3520 if (store.seen_nr == 0) {
3521 if (!store.seen_alloc) {
3522 /* Did not see key nor section */
3523 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3524 store.seen[0] = store.parsed_nr
3525 - !!store.parsed_nr;
3526 }
3527 store.seen_nr = 1;
3528 }
3529
3530 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3531 size_t replace_end;
3532 int j = store.seen[i];
3533
3534 new_line = 0;
3535 if (!store.key_seen) {
3536 copy_end = store.parsed[j].end;
3537 /* include '\n' when copying section header */
3538 if (copy_end > 0 && copy_end < contents_sz &&
3539 contents[copy_end - 1] != '\n' &&
3540 contents[copy_end] == '\n')
3541 copy_end++;
3542 replace_end = copy_end;
3543 } else {
3544 replace_end = store.parsed[j].end;
3545 copy_end = store.parsed[j].begin;
3546 if (!value)
3547 maybe_remove_section(&store,
3548 &copy_end,
3549 &replace_end, &i);
3550 /*
3551 * Swallow preceding white-space on the same
3552 * line.
3553 */
3554 while (copy_end > 0 ) {
3555 char c = contents[copy_end - 1];
3556
3557 if (isspace(c) && c != '\n')
3558 copy_end--;
3559 else
3560 break;
3561 }
3562 }
3563
3564 if (copy_end > 0 && contents[copy_end-1] != '\n')
3565 new_line = 1;
3566
3567 /* write the first part of the config */
3568 if (copy_end > copy_begin) {
3569 if (write_in_full(fd, contents + copy_begin,
3570 copy_end - copy_begin) < 0)
3571 goto write_err_out;
3572 if (new_line &&
3573 write_str_in_full(fd, "\n") < 0)
3574 goto write_err_out;
3575 }
3576 copy_begin = replace_end;
3577 }
3578
3579 /* write the pair (value == NULL means unset) */
3580 if (value) {
3581 if (!store.section_seen) {
3582 if (write_section(fd, key, &store) < 0)
3583 goto write_err_out;
3584 }
3585 if (write_pair(fd, key, value, &store) < 0)
3586 goto write_err_out;
3587 }
3588
3589 /* write the rest of the config */
3590 if (copy_begin < contents_sz)
3591 if (write_in_full(fd, contents + copy_begin,
3592 contents_sz - copy_begin) < 0)
3593 goto write_err_out;
3594
3595 munmap(contents, contents_sz);
3596 contents = NULL;
3597 }
3598
3599 if (commit_lock_file(&lock) < 0) {
3600 error_errno(_("could not write config file %s"), config_filename);
3601 ret = CONFIG_NO_WRITE;
3602 goto out_free;
3603 }
3604
3605 ret = 0;
3606
3607 /* Invalidate the config cache */
3608 git_config_clear();
3609
3610 out_free:
3611 rollback_lock_file(&lock);
3612 free(filename_buf);
3613 if (contents)
3614 munmap(contents, contents_sz);
3615 if (in_fd >= 0)
3616 close(in_fd);
3617 config_store_data_clear(&store);
3618 return ret;
3619
3620 write_err_out:
3621 ret = write_error(get_lock_file_path(&lock));
3622 goto out_free;
3623
3624 }
3625
3626 void git_config_set_multivar_in_file(const char *config_filename,
3627 const char *key, const char *value,
3628 const char *value_pattern, unsigned flags)
3629 {
3630 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
3631 value_pattern, flags))
3632 return;
3633 if (value)
3634 die(_("could not set '%s' to '%s'"), key, value);
3635 else
3636 die(_("could not unset '%s'"), key);
3637 }
3638
3639 int git_config_set_multivar_gently(const char *key, const char *value,
3640 const char *value_pattern, unsigned flags)
3641 {
3642 return repo_config_set_multivar_gently(the_repository, key, value,
3643 value_pattern, flags);
3644 }
3645
3646 int repo_config_set_multivar_gently(struct repository *r, const char *key,
3647 const char *value,
3648 const char *value_pattern, unsigned flags)
3649 {
3650 char *file = repo_git_path(r, "config");
3651 int res = git_config_set_multivar_in_file_gently(file,
3652 key, value,
3653 value_pattern,
3654 flags);
3655 free(file);
3656 return res;
3657 }
3658
3659 void git_config_set_multivar(const char *key, const char *value,
3660 const char *value_pattern, unsigned flags)
3661 {
3662 git_config_set_multivar_in_file(git_path("config"),
3663 key, value, value_pattern,
3664 flags);
3665 }
3666
3667 static size_t section_name_match (const char *buf, const char *name)
3668 {
3669 size_t i = 0, j = 0;
3670 int dot = 0;
3671 if (buf[i] != '[')
3672 return 0;
3673 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3674 if (!dot && isspace(buf[i])) {
3675 dot = 1;
3676 if (name[j++] != '.')
3677 break;
3678 for (i++; isspace(buf[i]); i++)
3679 ; /* do nothing */
3680 if (buf[i] != '"')
3681 break;
3682 continue;
3683 }
3684 if (buf[i] == '\\' && dot)
3685 i++;
3686 else if (buf[i] == '"' && dot) {
3687 for (i++; isspace(buf[i]); i++)
3688 ; /* do_nothing */
3689 break;
3690 }
3691 if (buf[i] != name[j++])
3692 break;
3693 }
3694 if (buf[i] == ']' && name[j] == 0) {
3695 /*
3696 * We match, now just find the right length offset by
3697 * gobbling up any whitespace after it, as well
3698 */
3699 i++;
3700 for (; buf[i] && isspace(buf[i]); i++)
3701 ; /* do nothing */
3702 return i;
3703 }
3704 return 0;
3705 }
3706
3707 static int section_name_is_ok(const char *name)
3708 {
3709 /* Empty section names are bogus. */
3710 if (!*name)
3711 return 0;
3712
3713 /*
3714 * Before a dot, we must be alphanumeric or dash. After the first dot,
3715 * anything goes, so we can stop checking.
3716 */
3717 for (; *name && *name != '.'; name++)
3718 if (*name != '-' && !isalnum(*name))
3719 return 0;
3720 return 1;
3721 }
3722
3723 #define GIT_CONFIG_MAX_LINE_LEN (512 * 1024)
3724
3725 /* if new_name == NULL, the section is removed instead */
3726 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3727 const char *old_name,
3728 const char *new_name, int copy)
3729 {
3730 int ret = 0, remove = 0;
3731 char *filename_buf = NULL;
3732 struct lock_file lock = LOCK_INIT;
3733 int out_fd;
3734 struct strbuf buf = STRBUF_INIT;
3735 FILE *config_file = NULL;
3736 struct stat st;
3737 struct strbuf copystr = STRBUF_INIT;
3738 struct config_store_data store;
3739 uint32_t line_nr = 0;
3740
3741 memset(&store, 0, sizeof(store));
3742
3743 if (new_name && !section_name_is_ok(new_name)) {
3744 ret = error(_("invalid section name: %s"), new_name);
3745 goto out_no_rollback;
3746 }
3747
3748 if (!config_filename)
3749 config_filename = filename_buf = git_pathdup("config");
3750
3751 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3752 if (out_fd < 0) {
3753 ret = error(_("could not lock config file %s"), config_filename);
3754 goto out;
3755 }
3756
3757 if (!(config_file = fopen(config_filename, "rb"))) {
3758 ret = warn_on_fopen_errors(config_filename);
3759 if (ret)
3760 goto out;
3761 /* no config file means nothing to rename, no error */
3762 goto commit_and_out;
3763 }
3764
3765 if (fstat(fileno(config_file), &st) == -1) {
3766 ret = error_errno(_("fstat on %s failed"), config_filename);
3767 goto out;
3768 }
3769
3770 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3771 ret = error_errno(_("chmod on %s failed"),
3772 get_lock_file_path(&lock));
3773 goto out;
3774 }
3775
3776 while (!strbuf_getwholeline(&buf, config_file, '\n')) {
3777 size_t i, length;
3778 int is_section = 0;
3779 char *output = buf.buf;
3780
3781 line_nr++;
3782
3783 if (buf.len >= GIT_CONFIG_MAX_LINE_LEN) {
3784 ret = error(_("refusing to work with overly long line "
3785 "in '%s' on line %"PRIuMAX),
3786 config_filename, (uintmax_t)line_nr);
3787 goto out;
3788 }
3789
3790 for (i = 0; buf.buf[i] && isspace(buf.buf[i]); i++)
3791 ; /* do nothing */
3792 if (buf.buf[i] == '[') {
3793 /* it's a section */
3794 size_t offset;
3795 is_section = 1;
3796
3797 /*
3798 * When encountering a new section under -c we
3799 * need to flush out any section we're already
3800 * coping and begin anew. There might be
3801 * multiple [branch "$name"] sections.
3802 */
3803 if (copystr.len > 0) {
3804 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3805 ret = write_error(get_lock_file_path(&lock));
3806 goto out;
3807 }
3808 strbuf_reset(&copystr);
3809 }
3810
3811 offset = section_name_match(&buf.buf[i], old_name);
3812 if (offset > 0) {
3813 ret++;
3814 if (!new_name) {
3815 remove = 1;
3816 continue;
3817 }
3818 store.baselen = strlen(new_name);
3819 if (!copy) {
3820 if (write_section(out_fd, new_name, &store) < 0) {
3821 ret = write_error(get_lock_file_path(&lock));
3822 goto out;
3823 }
3824 /*
3825 * We wrote out the new section, with
3826 * a newline, now skip the old
3827 * section's length
3828 */
3829 output += offset + i;
3830 if (strlen(output) > 0) {
3831 /*
3832 * More content means there's
3833 * a declaration to put on the
3834 * next line; indent with a
3835 * tab
3836 */
3837 output -= 1;
3838 output[0] = '\t';
3839 }
3840 } else {
3841 strbuf_release(&copystr);
3842 copystr = store_create_section(new_name, &store);
3843 }
3844 }
3845 remove = 0;
3846 }
3847 if (remove)
3848 continue;
3849 length = strlen(output);
3850
3851 if (!is_section && copystr.len > 0) {
3852 strbuf_add(&copystr, output, length);
3853 }
3854
3855 if (write_in_full(out_fd, output, length) < 0) {
3856 ret = write_error(get_lock_file_path(&lock));
3857 goto out;
3858 }
3859 }
3860
3861 /*
3862 * Copy a trailing section at the end of the config, won't be
3863 * flushed by the usual "flush because we have a new section
3864 * logic in the loop above.
3865 */
3866 if (copystr.len > 0) {
3867 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3868 ret = write_error(get_lock_file_path(&lock));
3869 goto out;
3870 }
3871 strbuf_reset(&copystr);
3872 }
3873
3874 fclose(config_file);
3875 config_file = NULL;
3876 commit_and_out:
3877 if (commit_lock_file(&lock) < 0)
3878 ret = error_errno(_("could not write config file %s"),
3879 config_filename);
3880 out:
3881 if (config_file)
3882 fclose(config_file);
3883 rollback_lock_file(&lock);
3884 out_no_rollback:
3885 free(filename_buf);
3886 config_store_data_clear(&store);
3887 strbuf_release(&buf);
3888 strbuf_release(&copystr);
3889 return ret;
3890 }
3891
3892 int git_config_rename_section_in_file(const char *config_filename,
3893 const char *old_name, const char *new_name)
3894 {
3895 return git_config_copy_or_rename_section_in_file(config_filename,
3896 old_name, new_name, 0);
3897 }
3898
3899 int git_config_rename_section(const char *old_name, const char *new_name)
3900 {
3901 return git_config_rename_section_in_file(NULL, old_name, new_name);
3902 }
3903
3904 int git_config_copy_section_in_file(const char *config_filename,
3905 const char *old_name, const char *new_name)
3906 {
3907 return git_config_copy_or_rename_section_in_file(config_filename,
3908 old_name, new_name, 1);
3909 }
3910
3911 int git_config_copy_section(const char *old_name, const char *new_name)
3912 {
3913 return git_config_copy_section_in_file(NULL, old_name, new_name);
3914 }
3915
3916 /*
3917 * Call this to report error for your variable that should not
3918 * get a boolean value (i.e. "[my] var" means "true").
3919 */
3920 #undef config_error_nonbool
3921 int config_error_nonbool(const char *var)
3922 {
3923 return error(_("missing value for '%s'"), var);
3924 }
3925
3926 int parse_config_key(const char *var,
3927 const char *section,
3928 const char **subsection, size_t *subsection_len,
3929 const char **key)
3930 {
3931 const char *dot;
3932
3933 /* Does it start with "section." ? */
3934 if (!skip_prefix(var, section, &var) || *var != '.')
3935 return -1;
3936
3937 /*
3938 * Find the key; we don't know yet if we have a subsection, but we must
3939 * parse backwards from the end, since the subsection may have dots in
3940 * it, too.
3941 */
3942 dot = strrchr(var, '.');
3943 *key = dot + 1;
3944
3945 /* Did we have a subsection at all? */
3946 if (dot == var) {
3947 if (subsection) {
3948 *subsection = NULL;
3949 *subsection_len = 0;
3950 }
3951 }
3952 else {
3953 if (!subsection)
3954 return -1;
3955 *subsection = var + 1;
3956 *subsection_len = dot - *subsection;
3957 }
3958
3959 return 0;
3960 }
3961
3962 static int reader_origin_type(struct config_reader *reader,
3963 enum config_origin_type *type)
3964 {
3965 if (the_reader.config_kvi)
3966 *type = reader->config_kvi->origin_type;
3967 else if(the_reader.source)
3968 *type = reader->source->origin_type;
3969 else
3970 return 1;
3971 return 0;
3972 }
3973
3974 const char *current_config_origin_type(void)
3975 {
3976 enum config_origin_type type = CONFIG_ORIGIN_UNKNOWN;
3977
3978 if (reader_origin_type(&the_reader, &type))
3979 BUG("current_config_origin_type called outside config callback");
3980
3981 switch (type) {
3982 case CONFIG_ORIGIN_BLOB:
3983 return "blob";
3984 case CONFIG_ORIGIN_FILE:
3985 return "file";
3986 case CONFIG_ORIGIN_STDIN:
3987 return "standard input";
3988 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3989 return "submodule-blob";
3990 case CONFIG_ORIGIN_CMDLINE:
3991 return "command line";
3992 default:
3993 BUG("unknown config origin type");
3994 }
3995 }
3996
3997 const char *config_scope_name(enum config_scope scope)
3998 {
3999 switch (scope) {
4000 case CONFIG_SCOPE_SYSTEM:
4001 return "system";
4002 case CONFIG_SCOPE_GLOBAL:
4003 return "global";
4004 case CONFIG_SCOPE_LOCAL:
4005 return "local";
4006 case CONFIG_SCOPE_WORKTREE:
4007 return "worktree";
4008 case CONFIG_SCOPE_COMMAND:
4009 return "command";
4010 case CONFIG_SCOPE_SUBMODULE:
4011 return "submodule";
4012 default:
4013 return "unknown";
4014 }
4015 }
4016
4017 static int reader_config_name(struct config_reader *reader, const char **out)
4018 {
4019 if (the_reader.config_kvi)
4020 *out = reader->config_kvi->filename;
4021 else if (the_reader.source)
4022 *out = reader->source->name;
4023 else
4024 return 1;
4025 return 0;
4026 }
4027
4028 const char *current_config_name(void)
4029 {
4030 const char *name;
4031 if (reader_config_name(&the_reader, &name))
4032 BUG("current_config_name called outside config callback");
4033 return name ? name : "";
4034 }
4035
4036 enum config_scope current_config_scope(void)
4037 {
4038 if (the_reader.config_kvi)
4039 return the_reader.config_kvi->scope;
4040 else
4041 return the_reader.parsing_scope;
4042 }
4043
4044 int current_config_line(void)
4045 {
4046 if (the_reader.config_kvi)
4047 return the_reader.config_kvi->linenr;
4048 else
4049 return the_reader.source->linenr;
4050 }
4051
4052 int lookup_config(const char **mapping, int nr_mapping, const char *var)
4053 {
4054 int i;
4055
4056 for (i = 0; i < nr_mapping; i++) {
4057 const char *name = mapping[i];
4058
4059 if (name && !strcasecmp(var, name))
4060 return i;
4061 }
4062 return -1;
4063 }
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