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Sync with 2.40.2
[git.git] / config.c
blob66fc088bd863642883e8de1fac4fd7cedb647fd4
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.h"
29 #include "pager.h"
30 #include "utf8.h"
31 #include "dir.h"
32 #include "color.h"
33 #include "replace-object.h"
34 #include "refs.h"
35 #include "setup.h"
36 #include "trace2.h"
37 #include "worktree.h"
38 #include "ws.h"
39 #include "wrapper.h"
40 #include "write-or-die.h"
41
42 struct config_source {
43 struct config_source *prev;
44 union {
45 FILE *file;
46 struct config_buf {
47 const char *buf;
48 size_t len;
49 size_t pos;
50 } buf;
51 } u;
52 enum config_origin_type origin_type;
53 const char *name;
54 const char *path;
55 enum config_error_action default_error_action;
56 int linenr;
57 int eof;
58 size_t total_len;
59 struct strbuf value;
60 struct strbuf var;
61 unsigned subsection_case_sensitive : 1;
62
63 int (*do_fgetc)(struct config_source *c);
64 int (*do_ungetc)(int c, struct config_source *conf);
65 long (*do_ftell)(struct config_source *c);
66 };
67 #define CONFIG_SOURCE_INIT { 0 }
68
69 struct config_reader {
70 /*
71 * These members record the "current" config source, which can be
72 * accessed by parsing callbacks.
73 *
74 * The "source" variable will be non-NULL only when we are actually
75 * parsing a real config source (file, blob, cmdline, etc).
76 *
77 * The "config_kvi" variable will be non-NULL only when we are feeding
78 * cached config from a configset into a callback.
79 *
80 * They cannot be non-NULL at the same time. If they are both NULL, then
81 * we aren't parsing anything (and depending on the function looking at
82 * the variables, it's either a bug for it to be called in the first
83 * place, or it's a function which can be reused for non-config
84 * purposes, and should fall back to some sane behavior).
85 */
86 struct config_source *source;
87 struct key_value_info *config_kvi;
88 /*
89 * The "scope" of the current config source being parsed (repo, global,
90 * etc). Like "source", this is only set when parsing a config source.
91 * It's not part of "source" because it transcends a single file (i.e.,
92 * a file included from .git/config is still in "repo" scope).
93 *
94 * When iterating through a configset, the equivalent value is
95 * "config_kvi.scope" (see above).
96 */
97 enum config_scope parsing_scope;
98 };
99 /*
100 * Where possible, prefer to accept "struct config_reader" as an arg than to use
101 * "the_reader". "the_reader" should only be used if that is infeasible, e.g. in
102 * a public function.
103 */
104 static struct config_reader the_reader;
105
106 static inline void config_reader_push_source(struct config_reader *reader,
107 struct config_source *top)
108 {
109 if (reader->config_kvi)
110 BUG("source should not be set while iterating a config set");
111 top->prev = reader->source;
112 reader->source = top;
113 }
114
115 static inline struct config_source *config_reader_pop_source(struct config_reader *reader)
116 {
117 struct config_source *ret;
118 if (!reader->source)
119 BUG("tried to pop config source, but we weren't reading config");
120 ret = reader->source;
121 reader->source = reader->source->prev;
122 return ret;
123 }
124
125 static inline void config_reader_set_kvi(struct config_reader *reader,
126 struct key_value_info *kvi)
127 {
128 if (kvi && (reader->source || reader->parsing_scope))
129 BUG("kvi should not be set while parsing a config source");
130 reader->config_kvi = kvi;
131 }
132
133 static inline void config_reader_set_scope(struct config_reader *reader,
134 enum config_scope scope)
135 {
136 if (scope && reader->config_kvi)
137 BUG("scope should only be set when iterating through a config source");
138 reader->parsing_scope = scope;
139 }
140
141 static int pack_compression_seen;
142 static int zlib_compression_seen;
143
144 /*
145 * Config that comes from trusted scopes, namely:
146 * - CONFIG_SCOPE_SYSTEM (e.g. /etc/gitconfig)
147 * - CONFIG_SCOPE_GLOBAL (e.g. $HOME/.gitconfig, $XDG_CONFIG_HOME/git)
148 * - CONFIG_SCOPE_COMMAND (e.g. "-c" option, environment variables)
149 *
150 * This is declared here for code cleanliness, but unlike the other
151 * static variables, this does not hold config parser state.
152 */
153 static struct config_set protected_config;
154
155 static int config_file_fgetc(struct config_source *conf)
156 {
157 return getc_unlocked(conf->u.file);
158 }
159
160 static int config_file_ungetc(int c, struct config_source *conf)
161 {
162 return ungetc(c, conf->u.file);
163 }
164
165 static long config_file_ftell(struct config_source *conf)
166 {
167 return ftell(conf->u.file);
168 }
169
170
171 static int config_buf_fgetc(struct config_source *conf)
172 {
173 if (conf->u.buf.pos < conf->u.buf.len)
174 return conf->u.buf.buf[conf->u.buf.pos++];
175
176 return EOF;
177 }
178
179 static int config_buf_ungetc(int c, struct config_source *conf)
180 {
181 if (conf->u.buf.pos > 0) {
182 conf->u.buf.pos--;
183 if (conf->u.buf.buf[conf->u.buf.pos] != c)
184 BUG("config_buf can only ungetc the same character");
185 return c;
186 }
187
188 return EOF;
189 }
190
191 static long config_buf_ftell(struct config_source *conf)
192 {
193 return conf->u.buf.pos;
194 }
195
196 struct config_include_data {
197 int depth;
198 config_fn_t fn;
199 void *data;
200 const struct config_options *opts;
201 struct git_config_source *config_source;
202 struct config_reader *config_reader;
203
204 /*
205 * All remote URLs discovered when reading all config files.
206 */
207 struct string_list *remote_urls;
208 };
209 #define CONFIG_INCLUDE_INIT { 0 }
210
211 static int git_config_include(const char *var, const char *value, void *data);
212
213 #define MAX_INCLUDE_DEPTH 10
214 static const char include_depth_advice[] = N_(
215 "exceeded maximum include depth (%d) while including\n"
216 " %s\n"
217 "from\n"
218 " %s\n"
219 "This might be due to circular includes.");
220 static int handle_path_include(struct config_source *cs, const char *path,
221 struct config_include_data *inc)
222 {
223 int ret = 0;
224 struct strbuf buf = STRBUF_INIT;
225 char *expanded;
226
227 if (!path)
228 return config_error_nonbool("include.path");
229
230 expanded = interpolate_path(path, 0);
231 if (!expanded)
232 return error(_("could not expand include path '%s'"), path);
233 path = expanded;
234
235 /*
236 * Use an absolute path as-is, but interpret relative paths
237 * based on the including config file.
238 */
239 if (!is_absolute_path(path)) {
240 char *slash;
241
242 if (!cs || !cs->path) {
243 ret = error(_("relative config includes must come from files"));
244 goto cleanup;
245 }
246
247 slash = find_last_dir_sep(cs->path);
248 if (slash)
249 strbuf_add(&buf, cs->path, slash - cs->path + 1);
250 strbuf_addstr(&buf, path);
251 path = buf.buf;
252 }
253
254 if (!access_or_die(path, R_OK, 0)) {
255 if (++inc->depth > MAX_INCLUDE_DEPTH)
256 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
257 !cs ? "<unknown>" :
258 cs->name ? cs->name :
259 "the command line");
260 ret = git_config_from_file(git_config_include, path, inc);
261 inc->depth--;
262 }
263 cleanup:
264 strbuf_release(&buf);
265 free(expanded);
266 return ret;
267 }
268
269 static void add_trailing_starstar_for_dir(struct strbuf *pat)
270 {
271 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
272 strbuf_addstr(pat, "**");
273 }
274
275 static int prepare_include_condition_pattern(struct config_source *cs,
276 struct strbuf *pat)
277 {
278 struct strbuf path = STRBUF_INIT;
279 char *expanded;
280 int prefix = 0;
281
282 expanded = interpolate_path(pat->buf, 1);
283 if (expanded) {
284 strbuf_reset(pat);
285 strbuf_addstr(pat, expanded);
286 free(expanded);
287 }
288
289 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
290 const char *slash;
291
292 if (!cs || !cs->path)
293 return error(_("relative config include "
294 "conditionals must come from files"));
295
296 strbuf_realpath(&path, cs->path, 1);
297 slash = find_last_dir_sep(path.buf);
298 if (!slash)
299 BUG("how is this possible?");
300 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
301 prefix = slash - path.buf + 1 /* slash */;
302 } else if (!is_absolute_path(pat->buf))
303 strbuf_insertstr(pat, 0, "**/");
304
305 add_trailing_starstar_for_dir(pat);
306
307 strbuf_release(&path);
308 return prefix;
309 }
310
311 static int include_by_gitdir(struct config_source *cs,
312 const struct config_options *opts,
313 const char *cond, size_t cond_len, int icase)
314 {
315 struct strbuf text = STRBUF_INIT;
316 struct strbuf pattern = STRBUF_INIT;
317 int ret = 0, prefix;
318 const char *git_dir;
319 int already_tried_absolute = 0;
320
321 if (opts->git_dir)
322 git_dir = opts->git_dir;
323 else
324 goto done;
325
326 strbuf_realpath(&text, git_dir, 1);
327 strbuf_add(&pattern, cond, cond_len);
328 prefix = prepare_include_condition_pattern(cs, &pattern);
329
330 again:
331 if (prefix < 0)
332 goto done;
333
334 if (prefix > 0) {
335 /*
336 * perform literal matching on the prefix part so that
337 * any wildcard character in it can't create side effects.
338 */
339 if (text.len < prefix)
340 goto done;
341 if (!icase && strncmp(pattern.buf, text.buf, prefix))
342 goto done;
343 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
344 goto done;
345 }
346
347 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
348 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
349
350 if (!ret && !already_tried_absolute) {
351 /*
352 * We've tried e.g. matching gitdir:~/work, but if
353 * ~/work is a symlink to /mnt/storage/work
354 * strbuf_realpath() will expand it, so the rule won't
355 * match. Let's match against a
356 * strbuf_add_absolute_path() version of the path,
357 * which'll do the right thing
358 */
359 strbuf_reset(&text);
360 strbuf_add_absolute_path(&text, git_dir);
361 already_tried_absolute = 1;
362 goto again;
363 }
364 done:
365 strbuf_release(&pattern);
366 strbuf_release(&text);
367 return ret;
368 }
369
370 static int include_by_branch(const char *cond, size_t cond_len)
371 {
372 int flags;
373 int ret;
374 struct strbuf pattern = STRBUF_INIT;
375 const char *refname = !the_repository->gitdir ?
376 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
377 const char *shortname;
378
379 if (!refname || !(flags & REF_ISSYMREF) ||
380 !skip_prefix(refname, "refs/heads/", &shortname))
381 return 0;
382
383 strbuf_add(&pattern, cond, cond_len);
384 add_trailing_starstar_for_dir(&pattern);
385 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
386 strbuf_release(&pattern);
387 return ret;
388 }
389
390 static int add_remote_url(const char *var, const char *value, void *data)
391 {
392 struct string_list *remote_urls = data;
393 const char *remote_name;
394 size_t remote_name_len;
395 const char *key;
396
397 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
398 &key) &&
399 remote_name &&
400 !strcmp(key, "url"))
401 string_list_append(remote_urls, value);
402 return 0;
403 }
404
405 static void populate_remote_urls(struct config_include_data *inc)
406 {
407 struct config_options opts;
408
409 enum config_scope store_scope = inc->config_reader->parsing_scope;
410
411 opts = *inc->opts;
412 opts.unconditional_remote_url = 1;
413
414 config_reader_set_scope(inc->config_reader, 0);
415
416 inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
417 string_list_init_dup(inc->remote_urls);
418 config_with_options(add_remote_url, inc->remote_urls, inc->config_source, &opts);
419
420 config_reader_set_scope(inc->config_reader, store_scope);
421 }
422
423 static int forbid_remote_url(const char *var, const char *value UNUSED,
424 void *data UNUSED)
425 {
426 const char *remote_name;
427 size_t remote_name_len;
428 const char *key;
429
430 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
431 &key) &&
432 remote_name &&
433 !strcmp(key, "url"))
434 die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url"));
435 return 0;
436 }
437
438 static int at_least_one_url_matches_glob(const char *glob, int glob_len,
439 struct string_list *remote_urls)
440 {
441 struct strbuf pattern = STRBUF_INIT;
442 struct string_list_item *url_item;
443 int found = 0;
444
445 strbuf_add(&pattern, glob, glob_len);
446 for_each_string_list_item(url_item, remote_urls) {
447 if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) {
448 found = 1;
449 break;
450 }
451 }
452 strbuf_release(&pattern);
453 return found;
454 }
455
456 static int include_by_remote_url(struct config_include_data *inc,
457 const char *cond, size_t cond_len)
458 {
459 if (inc->opts->unconditional_remote_url)
460 return 1;
461 if (!inc->remote_urls)
462 populate_remote_urls(inc);
463 return at_least_one_url_matches_glob(cond, cond_len,
464 inc->remote_urls);
465 }
466
467 static int include_condition_is_true(struct config_source *cs,
468 struct config_include_data *inc,
469 const char *cond, size_t cond_len)
470 {
471 const struct config_options *opts = inc->opts;
472
473 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
474 return include_by_gitdir(cs, opts, cond, cond_len, 0);
475 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
476 return include_by_gitdir(cs, opts, cond, cond_len, 1);
477 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
478 return include_by_branch(cond, cond_len);
479 else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond,
480 &cond_len))
481 return include_by_remote_url(inc, cond, cond_len);
482
483 /* unknown conditionals are always false */
484 return 0;
485 }
486
487 static int git_config_include(const char *var, const char *value, void *data)
488 {
489 struct config_include_data *inc = data;
490 struct config_source *cs = inc->config_reader->source;
491 const char *cond, *key;
492 size_t cond_len;
493 int ret;
494
495 /*
496 * Pass along all values, including "include" directives; this makes it
497 * possible to query information on the includes themselves.
498 */
499 ret = inc->fn(var, value, inc->data);
500 if (ret < 0)
501 return ret;
502
503 if (!strcmp(var, "include.path"))
504 ret = handle_path_include(cs, value, inc);
505
506 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
507 cond && include_condition_is_true(cs, inc, cond, cond_len) &&
508 !strcmp(key, "path")) {
509 config_fn_t old_fn = inc->fn;
510
511 if (inc->opts->unconditional_remote_url)
512 inc->fn = forbid_remote_url;
513 ret = handle_path_include(cs, value, inc);
514 inc->fn = old_fn;
515 }
516
517 return ret;
518 }
519
520 static void git_config_push_split_parameter(const char *key, const char *value)
521 {
522 struct strbuf env = STRBUF_INIT;
523 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
524 if (old && *old) {
525 strbuf_addstr(&env, old);
526 strbuf_addch(&env, ' ');
527 }
528 sq_quote_buf(&env, key);
529 strbuf_addch(&env, '=');
530 if (value)
531 sq_quote_buf(&env, value);
532 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
533 strbuf_release(&env);
534 }
535
536 void git_config_push_parameter(const char *text)
537 {
538 const char *value;
539
540 /*
541 * When we see:
542 *
543 * section.subsection=with=equals.key=value
544 *
545 * we cannot tell if it means:
546 *
547 * [section "subsection=with=equals"]
548 * key = value
549 *
550 * or:
551 *
552 * [section]
553 * subsection = with=equals.key=value
554 *
555 * We parse left-to-right for the first "=", meaning we'll prefer to
556 * keep the value intact over the subsection. This is historical, but
557 * also sensible since values are more likely to contain odd or
558 * untrusted input than a section name.
559 *
560 * A missing equals is explicitly allowed (as a bool-only entry).
561 */
562 value = strchr(text, '=');
563 if (value) {
564 char *key = xmemdupz(text, value - text);
565 git_config_push_split_parameter(key, value + 1);
566 free(key);
567 } else {
568 git_config_push_split_parameter(text, NULL);
569 }
570 }
571
572 void git_config_push_env(const char *spec)
573 {
574 char *key;
575 const char *env_name;
576 const char *env_value;
577
578 env_name = strrchr(spec, '=');
579 if (!env_name)
580 die(_("invalid config format: %s"), spec);
581 key = xmemdupz(spec, env_name - spec);
582 env_name++;
583 if (!*env_name)
584 die(_("missing environment variable name for configuration '%.*s'"),
585 (int)(env_name - spec - 1), spec);
586
587 env_value = getenv(env_name);
588 if (!env_value)
589 die(_("missing environment variable '%s' for configuration '%.*s'"),
590 env_name, (int)(env_name - spec - 1), spec);
591
592 git_config_push_split_parameter(key, env_value);
593 free(key);
594 }
595
596 static inline int iskeychar(int c)
597 {
598 return isalnum(c) || c == '-';
599 }
600
601 /*
602 * Auxiliary function to sanity-check and split the key into the section
603 * identifier and variable name.
604 *
605 * Returns 0 on success, -1 when there is an invalid character in the key and
606 * -2 if there is no section name in the key.
607 *
608 * store_key - pointer to char* which will hold a copy of the key with
609 * lowercase section and variable name
610 * baselen - pointer to size_t which will hold the length of the
611 * section + subsection part, can be NULL
612 */
613 int git_config_parse_key(const char *key, char **store_key, size_t *baselen_)
614 {
615 size_t i, baselen;
616 int dot;
617 const char *last_dot = strrchr(key, '.');
618
619 /*
620 * Since "key" actually contains the section name and the real
621 * key name separated by a dot, we have to know where the dot is.
622 */
623
624 if (last_dot == NULL || last_dot == key) {
625 error(_("key does not contain a section: %s"), key);
626 return -CONFIG_NO_SECTION_OR_NAME;
627 }
628
629 if (!last_dot[1]) {
630 error(_("key does not contain variable name: %s"), key);
631 return -CONFIG_NO_SECTION_OR_NAME;
632 }
633
634 baselen = last_dot - key;
635 if (baselen_)
636 *baselen_ = baselen;
637
638 /*
639 * Validate the key and while at it, lower case it for matching.
640 */
641 *store_key = xmallocz(strlen(key));
642
643 dot = 0;
644 for (i = 0; key[i]; i++) {
645 unsigned char c = key[i];
646 if (c == '.')
647 dot = 1;
648 /* Leave the extended basename untouched.. */
649 if (!dot || i > baselen) {
650 if (!iskeychar(c) ||
651 (i == baselen + 1 && !isalpha(c))) {
652 error(_("invalid key: %s"), key);
653 goto out_free_ret_1;
654 }
655 c = tolower(c);
656 } else if (c == '\n') {
657 error(_("invalid key (newline): %s"), key);
658 goto out_free_ret_1;
659 }
660 (*store_key)[i] = c;
661 }
662
663 return 0;
664
665 out_free_ret_1:
666 FREE_AND_NULL(*store_key);
667 return -CONFIG_INVALID_KEY;
668 }
669
670 static int config_parse_pair(const char *key, const char *value,
671 config_fn_t fn, void *data)
672 {
673 char *canonical_name;
674 int ret;
675
676 if (!strlen(key))
677 return error(_("empty config key"));
678 if (git_config_parse_key(key, &canonical_name, NULL))
679 return -1;
680
681 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
682 free(canonical_name);
683 return ret;
684 }
685
686 int git_config_parse_parameter(const char *text,
687 config_fn_t fn, void *data)
688 {
689 const char *value;
690 struct strbuf **pair;
691 int ret;
692
693 pair = strbuf_split_str(text, '=', 2);
694 if (!pair[0])
695 return error(_("bogus config parameter: %s"), text);
696
697 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
698 strbuf_setlen(pair[0], pair[0]->len - 1);
699 value = pair[1] ? pair[1]->buf : "";
700 } else {
701 value = NULL;
702 }
703
704 strbuf_trim(pair[0]);
705 if (!pair[0]->len) {
706 strbuf_list_free(pair);
707 return error(_("bogus config parameter: %s"), text);
708 }
709
710 ret = config_parse_pair(pair[0]->buf, value, fn, data);
711 strbuf_list_free(pair);
712 return ret;
713 }
714
715 static int parse_config_env_list(char *env, config_fn_t fn, void *data)
716 {
717 char *cur = env;
718 while (cur && *cur) {
719 const char *key = sq_dequote_step(cur, &cur);
720 if (!key)
721 return error(_("bogus format in %s"),
722 CONFIG_DATA_ENVIRONMENT);
723
724 if (!cur || isspace(*cur)) {
725 /* old-style 'key=value' */
726 if (git_config_parse_parameter(key, fn, data) < 0)
727 return -1;
728 }
729 else if (*cur == '=') {
730 /* new-style 'key'='value' */
731 const char *value;
732
733 cur++;
734 if (*cur == '\'') {
735 /* quoted value */
736 value = sq_dequote_step(cur, &cur);
737 if (!value || (cur && !isspace(*cur))) {
738 return error(_("bogus format in %s"),
739 CONFIG_DATA_ENVIRONMENT);
740 }
741 } else if (!*cur || isspace(*cur)) {
742 /* implicit bool: 'key'= */
743 value = NULL;
744 } else {
745 return error(_("bogus format in %s"),
746 CONFIG_DATA_ENVIRONMENT);
747 }
748
749 if (config_parse_pair(key, value, fn, data) < 0)
750 return -1;
751 }
752 else {
753 /* unknown format */
754 return error(_("bogus format in %s"),
755 CONFIG_DATA_ENVIRONMENT);
756 }
757
758 if (cur) {
759 while (isspace(*cur))
760 cur++;
761 }
762 }
763 return 0;
764 }
765
766 int git_config_from_parameters(config_fn_t fn, void *data)
767 {
768 const char *env;
769 struct strbuf envvar = STRBUF_INIT;
770 struct strvec to_free = STRVEC_INIT;
771 int ret = 0;
772 char *envw = NULL;
773 struct config_source source = CONFIG_SOURCE_INIT;
774
775 source.origin_type = CONFIG_ORIGIN_CMDLINE;
776 config_reader_push_source(&the_reader, &source);
777
778 env = getenv(CONFIG_COUNT_ENVIRONMENT);
779 if (env) {
780 unsigned long count;
781 char *endp;
782 int i;
783
784 count = strtoul(env, &endp, 10);
785 if (*endp) {
786 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
787 goto out;
788 }
789 if (count > INT_MAX) {
790 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
791 goto out;
792 }
793
794 for (i = 0; i < count; i++) {
795 const char *key, *value;
796
797 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
798 key = getenv_safe(&to_free, envvar.buf);
799 if (!key) {
800 ret = error(_("missing config key %s"), envvar.buf);
801 goto out;
802 }
803 strbuf_reset(&envvar);
804
805 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
806 value = getenv_safe(&to_free, envvar.buf);
807 if (!value) {
808 ret = error(_("missing config value %s"), envvar.buf);
809 goto out;
810 }
811 strbuf_reset(&envvar);
812
813 if (config_parse_pair(key, value, fn, data) < 0) {
814 ret = -1;
815 goto out;
816 }
817 }
818 }
819
820 env = getenv(CONFIG_DATA_ENVIRONMENT);
821 if (env) {
822 /* sq_dequote will write over it */
823 envw = xstrdup(env);
824 if (parse_config_env_list(envw, fn, data) < 0) {
825 ret = -1;
826 goto out;
827 }
828 }
829
830 out:
831 strbuf_release(&envvar);
832 strvec_clear(&to_free);
833 free(envw);
834 config_reader_pop_source(&the_reader);
835 return ret;
836 }
837
838 static int get_next_char(struct config_source *cs)
839 {
840 int c = cs->do_fgetc(cs);
841
842 if (c == '\r') {
843 /* DOS like systems */
844 c = cs->do_fgetc(cs);
845 if (c != '\n') {
846 if (c != EOF)
847 cs->do_ungetc(c, cs);
848 c = '\r';
849 }
850 }
851
852 if (c != EOF && ++cs->total_len > INT_MAX) {
853 /*
854 * This is an absurdly long config file; refuse to parse
855 * further in order to protect downstream code from integer
856 * overflows. Note that we can't return an error specifically,
857 * but we can mark EOF and put trash in the return value,
858 * which will trigger a parse error.
859 */
860 cs->eof = 1;
861 return 0;
862 }
863
864 if (c == '\n')
865 cs->linenr++;
866 if (c == EOF) {
867 cs->eof = 1;
868 cs->linenr++;
869 c = '\n';
870 }
871 return c;
872 }
873
874 static char *parse_value(struct config_source *cs)
875 {
876 int quote = 0, comment = 0, space = 0;
877
878 strbuf_reset(&cs->value);
879 for (;;) {
880 int c = get_next_char(cs);
881 if (c == '\n') {
882 if (quote) {
883 cs->linenr--;
884 return NULL;
885 }
886 return cs->value.buf;
887 }
888 if (comment)
889 continue;
890 if (isspace(c) && !quote) {
891 if (cs->value.len)
892 space++;
893 continue;
894 }
895 if (!quote) {
896 if (c == ';' || c == '#') {
897 comment = 1;
898 continue;
899 }
900 }
901 for (; space; space--)
902 strbuf_addch(&cs->value, ' ');
903 if (c == '\\') {
904 c = get_next_char(cs);
905 switch (c) {
906 case '\n':
907 continue;
908 case 't':
909 c = '\t';
910 break;
911 case 'b':
912 c = '\b';
913 break;
914 case 'n':
915 c = '\n';
916 break;
917 /* Some characters escape as themselves */
918 case '\\': case '"':
919 break;
920 /* Reject unknown escape sequences */
921 default:
922 return NULL;
923 }
924 strbuf_addch(&cs->value, c);
925 continue;
926 }
927 if (c == '"') {
928 quote = 1-quote;
929 continue;
930 }
931 strbuf_addch(&cs->value, c);
932 }
933 }
934
935 static int get_value(struct config_source *cs, config_fn_t fn, void *data,
936 struct strbuf *name)
937 {
938 int c;
939 char *value;
940 int ret;
941
942 /* Get the full name */
943 for (;;) {
944 c = get_next_char(cs);
945 if (cs->eof)
946 break;
947 if (!iskeychar(c))
948 break;
949 strbuf_addch(name, tolower(c));
950 }
951
952 while (c == ' ' || c == '\t')
953 c = get_next_char(cs);
954
955 value = NULL;
956 if (c != '\n') {
957 if (c != '=')
958 return -1;
959 value = parse_value(cs);
960 if (!value)
961 return -1;
962 }
963 /*
964 * We already consumed the \n, but we need linenr to point to
965 * the line we just parsed during the call to fn to get
966 * accurate line number in error messages.
967 */
968 cs->linenr--;
969 ret = fn(name->buf, value, data);
970 if (ret >= 0)
971 cs->linenr++;
972 return ret;
973 }
974
975 static int get_extended_base_var(struct config_source *cs, struct strbuf *name,
976 int c)
977 {
978 cs->subsection_case_sensitive = 0;
979 do {
980 if (c == '\n')
981 goto error_incomplete_line;
982 c = get_next_char(cs);
983 } while (isspace(c));
984
985 /* We require the format to be '[base "extension"]' */
986 if (c != '"')
987 return -1;
988 strbuf_addch(name, '.');
989
990 for (;;) {
991 int c = get_next_char(cs);
992 if (c == '\n')
993 goto error_incomplete_line;
994 if (c == '"')
995 break;
996 if (c == '\\') {
997 c = get_next_char(cs);
998 if (c == '\n')
999 goto error_incomplete_line;
1000 }
1001 strbuf_addch(name, c);
1002 }
1003
1004 /* Final ']' */
1005 if (get_next_char(cs) != ']')
1006 return -1;
1007 return 0;
1008 error_incomplete_line:
1009 cs->linenr--;
1010 return -1;
1011 }
1012
1013 static int get_base_var(struct config_source *cs, struct strbuf *name)
1014 {
1015 cs->subsection_case_sensitive = 1;
1016 for (;;) {
1017 int c = get_next_char(cs);
1018 if (cs->eof)
1019 return -1;
1020 if (c == ']')
1021 return 0;
1022 if (isspace(c))
1023 return get_extended_base_var(cs, name, c);
1024 if (!iskeychar(c) && c != '.')
1025 return -1;
1026 strbuf_addch(name, tolower(c));
1027 }
1028 }
1029
1030 struct parse_event_data {
1031 enum config_event_t previous_type;
1032 size_t previous_offset;
1033 const struct config_options *opts;
1034 };
1035
1036 static int do_event(struct config_source *cs, enum config_event_t type,
1037 struct parse_event_data *data)
1038 {
1039 size_t offset;
1040
1041 if (!data->opts || !data->opts->event_fn)
1042 return 0;
1043
1044 if (type == CONFIG_EVENT_WHITESPACE &&
1045 data->previous_type == type)
1046 return 0;
1047
1048 offset = cs->do_ftell(cs);
1049 /*
1050 * At EOF, the parser always "inserts" an extra '\n', therefore
1051 * the end offset of the event is the current file position, otherwise
1052 * we will already have advanced to the next event.
1053 */
1054 if (type != CONFIG_EVENT_EOF)
1055 offset--;
1056
1057 if (data->previous_type != CONFIG_EVENT_EOF &&
1058 data->opts->event_fn(data->previous_type, data->previous_offset,
1059 offset, data->opts->event_fn_data) < 0)
1060 return -1;
1061
1062 data->previous_type = type;
1063 data->previous_offset = offset;
1064
1065 return 0;
1066 }
1067
1068 static int git_parse_source(struct config_source *cs, config_fn_t fn,
1069 void *data, const struct config_options *opts)
1070 {
1071 int comment = 0;
1072 size_t baselen = 0;
1073 struct strbuf *var = &cs->var;
1074 int error_return = 0;
1075 char *error_msg = NULL;
1076
1077 /* U+FEFF Byte Order Mark in UTF8 */
1078 const char *bomptr = utf8_bom;
1079
1080 /* For the parser event callback */
1081 struct parse_event_data event_data = {
1082 CONFIG_EVENT_EOF, 0, opts
1083 };
1084
1085 for (;;) {
1086 int c;
1087
1088 c = get_next_char(cs);
1089 if (bomptr && *bomptr) {
1090 /* We are at the file beginning; skip UTF8-encoded BOM
1091 * if present. Sane editors won't put this in on their
1092 * own, but e.g. Windows Notepad will do it happily. */
1093 if (c == (*bomptr & 0377)) {
1094 bomptr++;
1095 continue;
1096 } else {
1097 /* Do not tolerate partial BOM. */
1098 if (bomptr != utf8_bom)
1099 break;
1100 /* No BOM at file beginning. Cool. */
1101 bomptr = NULL;
1102 }
1103 }
1104 if (c == '\n') {
1105 if (cs->eof) {
1106 if (do_event(cs, CONFIG_EVENT_EOF, &event_data) < 0)
1107 return -1;
1108 return 0;
1109 }
1110 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1111 return -1;
1112 comment = 0;
1113 continue;
1114 }
1115 if (comment)
1116 continue;
1117 if (isspace(c)) {
1118 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1119 return -1;
1120 continue;
1121 }
1122 if (c == '#' || c == ';') {
1123 if (do_event(cs, CONFIG_EVENT_COMMENT, &event_data) < 0)
1124 return -1;
1125 comment = 1;
1126 continue;
1127 }
1128 if (c == '[') {
1129 if (do_event(cs, CONFIG_EVENT_SECTION, &event_data) < 0)
1130 return -1;
1131
1132 /* Reset prior to determining a new stem */
1133 strbuf_reset(var);
1134 if (get_base_var(cs, var) < 0 || var->len < 1)
1135 break;
1136 strbuf_addch(var, '.');
1137 baselen = var->len;
1138 continue;
1139 }
1140 if (!isalpha(c))
1141 break;
1142
1143 if (do_event(cs, CONFIG_EVENT_ENTRY, &event_data) < 0)
1144 return -1;
1145
1146 /*
1147 * Truncate the var name back to the section header
1148 * stem prior to grabbing the suffix part of the name
1149 * and the value.
1150 */
1151 strbuf_setlen(var, baselen);
1152 strbuf_addch(var, tolower(c));
1153 if (get_value(cs, fn, data, var) < 0)
1154 break;
1155 }
1156
1157 if (do_event(cs, CONFIG_EVENT_ERROR, &event_data) < 0)
1158 return -1;
1159
1160 switch (cs->origin_type) {
1161 case CONFIG_ORIGIN_BLOB:
1162 error_msg = xstrfmt(_("bad config line %d in blob %s"),
1163 cs->linenr, cs->name);
1164 break;
1165 case CONFIG_ORIGIN_FILE:
1166 error_msg = xstrfmt(_("bad config line %d in file %s"),
1167 cs->linenr, cs->name);
1168 break;
1169 case CONFIG_ORIGIN_STDIN:
1170 error_msg = xstrfmt(_("bad config line %d in standard input"),
1171 cs->linenr);
1172 break;
1173 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1174 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1175 cs->linenr, cs->name);
1176 break;
1177 case CONFIG_ORIGIN_CMDLINE:
1178 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1179 cs->linenr, cs->name);
1180 break;
1181 default:
1182 error_msg = xstrfmt(_("bad config line %d in %s"),
1183 cs->linenr, cs->name);
1184 }
1185
1186 switch (opts && opts->error_action ?
1187 opts->error_action :
1188 cs->default_error_action) {
1189 case CONFIG_ERROR_DIE:
1190 die("%s", error_msg);
1191 break;
1192 case CONFIG_ERROR_ERROR:
1193 error_return = error("%s", error_msg);
1194 break;
1195 case CONFIG_ERROR_SILENT:
1196 error_return = -1;
1197 break;
1198 case CONFIG_ERROR_UNSET:
1199 BUG("config error action unset");
1200 }
1201
1202 free(error_msg);
1203 return error_return;
1204 }
1205
1206 static uintmax_t get_unit_factor(const char *end)
1207 {
1208 if (!*end)
1209 return 1;
1210 else if (!strcasecmp(end, "k"))
1211 return 1024;
1212 else if (!strcasecmp(end, "m"))
1213 return 1024 * 1024;
1214 else if (!strcasecmp(end, "g"))
1215 return 1024 * 1024 * 1024;
1216 return 0;
1217 }
1218
1219 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
1220 {
1221 if (value && *value) {
1222 char *end;
1223 intmax_t val;
1224 intmax_t factor;
1225
1226 if (max < 0)
1227 BUG("max must be a positive integer");
1228
1229 errno = 0;
1230 val = strtoimax(value, &end, 0);
1231 if (errno == ERANGE)
1232 return 0;
1233 if (end == value) {
1234 errno = EINVAL;
1235 return 0;
1236 }
1237 factor = get_unit_factor(end);
1238 if (!factor) {
1239 errno = EINVAL;
1240 return 0;
1241 }
1242 if ((val < 0 && -max / factor > val) ||
1243 (val > 0 && max / factor < val)) {
1244 errno = ERANGE;
1245 return 0;
1246 }
1247 val *= factor;
1248 *ret = val;
1249 return 1;
1250 }
1251 errno = EINVAL;
1252 return 0;
1253 }
1254
1255 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
1256 {
1257 if (value && *value) {
1258 char *end;
1259 uintmax_t val;
1260 uintmax_t factor;
1261
1262 /* negative values would be accepted by strtoumax */
1263 if (strchr(value, '-')) {
1264 errno = EINVAL;
1265 return 0;
1266 }
1267 errno = 0;
1268 val = strtoumax(value, &end, 0);
1269 if (errno == ERANGE)
1270 return 0;
1271 if (end == value) {
1272 errno = EINVAL;
1273 return 0;
1274 }
1275 factor = get_unit_factor(end);
1276 if (!factor) {
1277 errno = EINVAL;
1278 return 0;
1279 }
1280 if (unsigned_mult_overflows(factor, val) ||
1281 factor * val > max) {
1282 errno = ERANGE;
1283 return 0;
1284 }
1285 val *= factor;
1286 *ret = val;
1287 return 1;
1288 }
1289 errno = EINVAL;
1290 return 0;
1291 }
1292
1293 int git_parse_int(const char *value, int *ret)
1294 {
1295 intmax_t tmp;
1296 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
1297 return 0;
1298 *ret = tmp;
1299 return 1;
1300 }
1301
1302 static int git_parse_int64(const char *value, int64_t *ret)
1303 {
1304 intmax_t tmp;
1305 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
1306 return 0;
1307 *ret = tmp;
1308 return 1;
1309 }
1310
1311 int git_parse_ulong(const char *value, unsigned long *ret)
1312 {
1313 uintmax_t tmp;
1314 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
1315 return 0;
1316 *ret = tmp;
1317 return 1;
1318 }
1319
1320 int git_parse_ssize_t(const char *value, ssize_t *ret)
1321 {
1322 intmax_t tmp;
1323 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
1324 return 0;
1325 *ret = tmp;
1326 return 1;
1327 }
1328
1329 static int reader_config_name(struct config_reader *reader, const char **out);
1330 static int reader_origin_type(struct config_reader *reader,
1331 enum config_origin_type *type);
1332 NORETURN
1333 static void die_bad_number(struct config_reader *reader, const char *name,
1334 const char *value)
1335 {
1336 const char *error_type = (errno == ERANGE) ?
1337 N_("out of range") : N_("invalid unit");
1338 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1339 const char *config_name = NULL;
1340 enum config_origin_type config_origin = CONFIG_ORIGIN_UNKNOWN;
1341
1342 if (!value)
1343 value = "";
1344
1345 /* Ignoring the return value is okay since we handle missing values. */
1346 reader_config_name(reader, &config_name);
1347 reader_origin_type(reader, &config_origin);
1348
1349 if (!config_name)
1350 die(_(bad_numeric), value, name, _(error_type));
1351
1352 switch (config_origin) {
1353 case CONFIG_ORIGIN_BLOB:
1354 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1355 value, name, config_name, _(error_type));
1356 case CONFIG_ORIGIN_FILE:
1357 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1358 value, name, config_name, _(error_type));
1359 case CONFIG_ORIGIN_STDIN:
1360 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1361 value, name, _(error_type));
1362 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1363 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1364 value, name, config_name, _(error_type));
1365 case CONFIG_ORIGIN_CMDLINE:
1366 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1367 value, name, config_name, _(error_type));
1368 default:
1369 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1370 value, name, config_name, _(error_type));
1371 }
1372 }
1373
1374 int git_config_int(const char *name, const char *value)
1375 {
1376 int ret;
1377 if (!git_parse_int(value, &ret))
1378 die_bad_number(&the_reader, name, value);
1379 return ret;
1380 }
1381
1382 int64_t git_config_int64(const char *name, const char *value)
1383 {
1384 int64_t ret;
1385 if (!git_parse_int64(value, &ret))
1386 die_bad_number(&the_reader, name, value);
1387 return ret;
1388 }
1389
1390 unsigned long git_config_ulong(const char *name, const char *value)
1391 {
1392 unsigned long ret;
1393 if (!git_parse_ulong(value, &ret))
1394 die_bad_number(&the_reader, name, value);
1395 return ret;
1396 }
1397
1398 ssize_t git_config_ssize_t(const char *name, const char *value)
1399 {
1400 ssize_t ret;
1401 if (!git_parse_ssize_t(value, &ret))
1402 die_bad_number(&the_reader, name, value);
1403 return ret;
1404 }
1405
1406 static int git_parse_maybe_bool_text(const char *value)
1407 {
1408 if (!value)
1409 return 1;
1410 if (!*value)
1411 return 0;
1412 if (!strcasecmp(value, "true")
1413 || !strcasecmp(value, "yes")
1414 || !strcasecmp(value, "on"))
1415 return 1;
1416 if (!strcasecmp(value, "false")
1417 || !strcasecmp(value, "no")
1418 || !strcasecmp(value, "off"))
1419 return 0;
1420 return -1;
1421 }
1422
1423 static const struct fsync_component_name {
1424 const char *name;
1425 enum fsync_component component_bits;
1426 } fsync_component_names[] = {
1427 { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT },
1428 { "pack", FSYNC_COMPONENT_PACK },
1429 { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
1430 { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
1431 { "index", FSYNC_COMPONENT_INDEX },
1432 { "objects", FSYNC_COMPONENTS_OBJECTS },
1433 { "reference", FSYNC_COMPONENT_REFERENCE },
1434 { "derived-metadata", FSYNC_COMPONENTS_DERIVED_METADATA },
1435 { "committed", FSYNC_COMPONENTS_COMMITTED },
1436 { "added", FSYNC_COMPONENTS_ADDED },
1437 { "all", FSYNC_COMPONENTS_ALL },
1438 };
1439
1440 static enum fsync_component parse_fsync_components(const char *var, const char *string)
1441 {
1442 enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
1443 enum fsync_component positive = 0, negative = 0;
1444
1445 while (string) {
1446 int i;
1447 size_t len;
1448 const char *ep;
1449 int negated = 0;
1450 int found = 0;
1451
1452 string = string + strspn(string, ", \t\n\r");
1453 ep = strchrnul(string, ',');
1454 len = ep - string;
1455 if (!strcmp(string, "none")) {
1456 current = FSYNC_COMPONENT_NONE;
1457 goto next_name;
1458 }
1459
1460 if (*string == '-') {
1461 negated = 1;
1462 string++;
1463 len--;
1464 if (!len)
1465 warning(_("invalid value for variable %s"), var);
1466 }
1467
1468 if (!len)
1469 break;
1470
1471 for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) {
1472 const struct fsync_component_name *n = &fsync_component_names[i];
1473
1474 if (strncmp(n->name, string, len))
1475 continue;
1476
1477 found = 1;
1478 if (negated)
1479 negative |= n->component_bits;
1480 else
1481 positive |= n->component_bits;
1482 }
1483
1484 if (!found) {
1485 char *component = xstrndup(string, len);
1486 warning(_("ignoring unknown core.fsync component '%s'"), component);
1487 free(component);
1488 }
1489
1490 next_name:
1491 string = ep;
1492 }
1493
1494 return (current & ~negative) | positive;
1495 }
1496
1497 int git_parse_maybe_bool(const char *value)
1498 {
1499 int v = git_parse_maybe_bool_text(value);
1500 if (0 <= v)
1501 return v;
1502 if (git_parse_int(value, &v))
1503 return !!v;
1504 return -1;
1505 }
1506
1507 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1508 {
1509 int v = git_parse_maybe_bool_text(value);
1510 if (0 <= v) {
1511 *is_bool = 1;
1512 return v;
1513 }
1514 *is_bool = 0;
1515 return git_config_int(name, value);
1516 }
1517
1518 int git_config_bool(const char *name, const char *value)
1519 {
1520 int v = git_parse_maybe_bool(value);
1521 if (v < 0)
1522 die(_("bad boolean config value '%s' for '%s'"), value, name);
1523 return v;
1524 }
1525
1526 int git_config_string(const char **dest, const char *var, const char *value)
1527 {
1528 if (!value)
1529 return config_error_nonbool(var);
1530 *dest = xstrdup(value);
1531 return 0;
1532 }
1533
1534 int git_config_pathname(const char **dest, const char *var, const char *value)
1535 {
1536 if (!value)
1537 return config_error_nonbool(var);
1538 *dest = interpolate_path(value, 0);
1539 if (!*dest)
1540 die(_("failed to expand user dir in: '%s'"), value);
1541 return 0;
1542 }
1543
1544 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1545 {
1546 if (!value)
1547 return config_error_nonbool(var);
1548 if (parse_expiry_date(value, timestamp))
1549 return error(_("'%s' for '%s' is not a valid timestamp"),
1550 value, var);
1551 return 0;
1552 }
1553
1554 int git_config_color(char *dest, const char *var, const char *value)
1555 {
1556 if (!value)
1557 return config_error_nonbool(var);
1558 if (color_parse(value, dest) < 0)
1559 return -1;
1560 return 0;
1561 }
1562
1563 static int git_default_core_config(const char *var, const char *value, void *cb)
1564 {
1565 /* This needs a better name */
1566 if (!strcmp(var, "core.filemode")) {
1567 trust_executable_bit = git_config_bool(var, value);
1568 return 0;
1569 }
1570 if (!strcmp(var, "core.trustctime")) {
1571 trust_ctime = git_config_bool(var, value);
1572 return 0;
1573 }
1574 if (!strcmp(var, "core.checkstat")) {
1575 if (!strcasecmp(value, "default"))
1576 check_stat = 1;
1577 else if (!strcasecmp(value, "minimal"))
1578 check_stat = 0;
1579 }
1580
1581 if (!strcmp(var, "core.quotepath")) {
1582 quote_path_fully = git_config_bool(var, value);
1583 return 0;
1584 }
1585
1586 if (!strcmp(var, "core.symlinks")) {
1587 has_symlinks = git_config_bool(var, value);
1588 return 0;
1589 }
1590
1591 if (!strcmp(var, "core.ignorecase")) {
1592 ignore_case = git_config_bool(var, value);
1593 return 0;
1594 }
1595
1596 if (!strcmp(var, "core.attributesfile"))
1597 return git_config_pathname(&git_attributes_file, var, value);
1598
1599 if (!strcmp(var, "core.hookspath")) {
1600 if (current_config_scope() == CONFIG_SCOPE_LOCAL &&
1601 git_env_bool("GIT_CLONE_PROTECTION_ACTIVE", 0))
1602 die(_("active `core.hooksPath` found in the local "
1603 "repository config:\n\t%s\nFor security "
1604 "reasons, this is disallowed by default.\nIf "
1605 "this is intentional and the hook should "
1606 "actually be run, please\nrun the command "
1607 "again with "
1608 "`GIT_CLONE_PROTECTION_ACTIVE=false`"),
1609 value);
1610 return git_config_pathname(&git_hooks_path, var, value);
1611 }
1612
1613 if (!strcmp(var, "core.bare")) {
1614 is_bare_repository_cfg = git_config_bool(var, value);
1615 return 0;
1616 }
1617
1618 if (!strcmp(var, "core.ignorestat")) {
1619 assume_unchanged = git_config_bool(var, value);
1620 return 0;
1621 }
1622
1623 if (!strcmp(var, "core.prefersymlinkrefs")) {
1624 prefer_symlink_refs = git_config_bool(var, value);
1625 return 0;
1626 }
1627
1628 if (!strcmp(var, "core.logallrefupdates")) {
1629 if (value && !strcasecmp(value, "always"))
1630 log_all_ref_updates = LOG_REFS_ALWAYS;
1631 else if (git_config_bool(var, value))
1632 log_all_ref_updates = LOG_REFS_NORMAL;
1633 else
1634 log_all_ref_updates = LOG_REFS_NONE;
1635 return 0;
1636 }
1637
1638 if (!strcmp(var, "core.warnambiguousrefs")) {
1639 warn_ambiguous_refs = git_config_bool(var, value);
1640 return 0;
1641 }
1642
1643 if (!strcmp(var, "core.abbrev")) {
1644 if (!value)
1645 return config_error_nonbool(var);
1646 if (!strcasecmp(value, "auto"))
1647 default_abbrev = -1;
1648 else if (!git_parse_maybe_bool_text(value))
1649 default_abbrev = the_hash_algo->hexsz;
1650 else {
1651 int abbrev = git_config_int(var, value);
1652 if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
1653 return error(_("abbrev length out of range: %d"), abbrev);
1654 default_abbrev = abbrev;
1655 }
1656 return 0;
1657 }
1658
1659 if (!strcmp(var, "core.disambiguate"))
1660 return set_disambiguate_hint_config(var, value);
1661
1662 if (!strcmp(var, "core.loosecompression")) {
1663 int level = git_config_int(var, value);
1664 if (level == -1)
1665 level = Z_DEFAULT_COMPRESSION;
1666 else if (level < 0 || level > Z_BEST_COMPRESSION)
1667 die(_("bad zlib compression level %d"), level);
1668 zlib_compression_level = level;
1669 zlib_compression_seen = 1;
1670 return 0;
1671 }
1672
1673 if (!strcmp(var, "core.compression")) {
1674 int level = git_config_int(var, value);
1675 if (level == -1)
1676 level = Z_DEFAULT_COMPRESSION;
1677 else if (level < 0 || level > Z_BEST_COMPRESSION)
1678 die(_("bad zlib compression level %d"), level);
1679 if (!zlib_compression_seen)
1680 zlib_compression_level = level;
1681 if (!pack_compression_seen)
1682 pack_compression_level = level;
1683 return 0;
1684 }
1685
1686 if (!strcmp(var, "core.packedgitwindowsize")) {
1687 int pgsz_x2 = getpagesize() * 2;
1688 packed_git_window_size = git_config_ulong(var, value);
1689
1690 /* This value must be multiple of (pagesize * 2) */
1691 packed_git_window_size /= pgsz_x2;
1692 if (packed_git_window_size < 1)
1693 packed_git_window_size = 1;
1694 packed_git_window_size *= pgsz_x2;
1695 return 0;
1696 }
1697
1698 if (!strcmp(var, "core.bigfilethreshold")) {
1699 big_file_threshold = git_config_ulong(var, value);
1700 return 0;
1701 }
1702
1703 if (!strcmp(var, "core.packedgitlimit")) {
1704 packed_git_limit = git_config_ulong(var, value);
1705 return 0;
1706 }
1707
1708 if (!strcmp(var, "core.deltabasecachelimit")) {
1709 delta_base_cache_limit = git_config_ulong(var, value);
1710 return 0;
1711 }
1712
1713 if (!strcmp(var, "core.autocrlf")) {
1714 if (value && !strcasecmp(value, "input")) {
1715 auto_crlf = AUTO_CRLF_INPUT;
1716 return 0;
1717 }
1718 auto_crlf = git_config_bool(var, value);
1719 return 0;
1720 }
1721
1722 if (!strcmp(var, "core.safecrlf")) {
1723 int eol_rndtrp_die;
1724 if (value && !strcasecmp(value, "warn")) {
1725 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1726 return 0;
1727 }
1728 eol_rndtrp_die = git_config_bool(var, value);
1729 global_conv_flags_eol = eol_rndtrp_die ?
1730 CONV_EOL_RNDTRP_DIE : 0;
1731 return 0;
1732 }
1733
1734 if (!strcmp(var, "core.eol")) {
1735 if (value && !strcasecmp(value, "lf"))
1736 core_eol = EOL_LF;
1737 else if (value && !strcasecmp(value, "crlf"))
1738 core_eol = EOL_CRLF;
1739 else if (value && !strcasecmp(value, "native"))
1740 core_eol = EOL_NATIVE;
1741 else
1742 core_eol = EOL_UNSET;
1743 return 0;
1744 }
1745
1746 if (!strcmp(var, "core.checkroundtripencoding")) {
1747 check_roundtrip_encoding = xstrdup(value);
1748 return 0;
1749 }
1750
1751 if (!strcmp(var, "core.notesref")) {
1752 notes_ref_name = xstrdup(value);
1753 return 0;
1754 }
1755
1756 if (!strcmp(var, "core.editor"))
1757 return git_config_string(&editor_program, var, value);
1758
1759 if (!strcmp(var, "core.commentchar")) {
1760 if (!value)
1761 return config_error_nonbool(var);
1762 else if (!strcasecmp(value, "auto"))
1763 auto_comment_line_char = 1;
1764 else if (value[0] && !value[1]) {
1765 comment_line_char = value[0];
1766 auto_comment_line_char = 0;
1767 } else
1768 return error(_("core.commentChar should only be one ASCII character"));
1769 return 0;
1770 }
1771
1772 if (!strcmp(var, "core.askpass"))
1773 return git_config_string(&askpass_program, var, value);
1774
1775 if (!strcmp(var, "core.excludesfile"))
1776 return git_config_pathname(&excludes_file, var, value);
1777
1778 if (!strcmp(var, "core.whitespace")) {
1779 if (!value)
1780 return config_error_nonbool(var);
1781 whitespace_rule_cfg = parse_whitespace_rule(value);
1782 return 0;
1783 }
1784
1785 if (!strcmp(var, "core.fsync")) {
1786 if (!value)
1787 return config_error_nonbool(var);
1788 fsync_components = parse_fsync_components(var, value);
1789 return 0;
1790 }
1791
1792 if (!strcmp(var, "core.fsyncmethod")) {
1793 if (!value)
1794 return config_error_nonbool(var);
1795 if (!strcmp(value, "fsync"))
1796 fsync_method = FSYNC_METHOD_FSYNC;
1797 else if (!strcmp(value, "writeout-only"))
1798 fsync_method = FSYNC_METHOD_WRITEOUT_ONLY;
1799 else if (!strcmp(value, "batch"))
1800 fsync_method = FSYNC_METHOD_BATCH;
1801 else
1802 warning(_("ignoring unknown core.fsyncMethod value '%s'"), value);
1803
1804 }
1805
1806 if (!strcmp(var, "core.fsyncobjectfiles")) {
1807 if (fsync_object_files < 0)
1808 warning(_("core.fsyncObjectFiles is deprecated; use core.fsync instead"));
1809 fsync_object_files = git_config_bool(var, value);
1810 return 0;
1811 }
1812
1813 if (!strcmp(var, "core.preloadindex")) {
1814 core_preload_index = git_config_bool(var, value);
1815 return 0;
1816 }
1817
1818 if (!strcmp(var, "core.createobject")) {
1819 if (!strcmp(value, "rename"))
1820 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1821 else if (!strcmp(value, "link"))
1822 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1823 else
1824 die(_("invalid mode for object creation: %s"), value);
1825 return 0;
1826 }
1827
1828 if (!strcmp(var, "core.sparsecheckout")) {
1829 core_apply_sparse_checkout = git_config_bool(var, value);
1830 return 0;
1831 }
1832
1833 if (!strcmp(var, "core.sparsecheckoutcone")) {
1834 core_sparse_checkout_cone = git_config_bool(var, value);
1835 return 0;
1836 }
1837
1838 if (!strcmp(var, "core.precomposeunicode")) {
1839 precomposed_unicode = git_config_bool(var, value);
1840 return 0;
1841 }
1842
1843 if (!strcmp(var, "core.protecthfs")) {
1844 protect_hfs = git_config_bool(var, value);
1845 return 0;
1846 }
1847
1848 if (!strcmp(var, "core.protectntfs")) {
1849 protect_ntfs = git_config_bool(var, value);
1850 return 0;
1851 }
1852
1853 if (!strcmp(var, "core.usereplacerefs")) {
1854 read_replace_refs = git_config_bool(var, value);
1855 return 0;
1856 }
1857
1858 /* Add other config variables here and to Documentation/config.txt. */
1859 return platform_core_config(var, value, cb);
1860 }
1861
1862 static int git_default_sparse_config(const char *var, const char *value)
1863 {
1864 if (!strcmp(var, "sparse.expectfilesoutsideofpatterns")) {
1865 sparse_expect_files_outside_of_patterns = git_config_bool(var, value);
1866 return 0;
1867 }
1868
1869 /* Add other config variables here and to Documentation/config/sparse.txt. */
1870 return 0;
1871 }
1872
1873 static int git_default_i18n_config(const char *var, const char *value)
1874 {
1875 if (!strcmp(var, "i18n.commitencoding"))
1876 return git_config_string(&git_commit_encoding, var, value);
1877
1878 if (!strcmp(var, "i18n.logoutputencoding"))
1879 return git_config_string(&git_log_output_encoding, var, value);
1880
1881 /* Add other config variables here and to Documentation/config.txt. */
1882 return 0;
1883 }
1884
1885 static int git_default_branch_config(const char *var, const char *value)
1886 {
1887 if (!strcmp(var, "branch.autosetupmerge")) {
1888 if (value && !strcmp(value, "always")) {
1889 git_branch_track = BRANCH_TRACK_ALWAYS;
1890 return 0;
1891 } else if (value && !strcmp(value, "inherit")) {
1892 git_branch_track = BRANCH_TRACK_INHERIT;
1893 return 0;
1894 } else if (value && !strcmp(value, "simple")) {
1895 git_branch_track = BRANCH_TRACK_SIMPLE;
1896 return 0;
1897 }
1898 git_branch_track = git_config_bool(var, value);
1899 return 0;
1900 }
1901 if (!strcmp(var, "branch.autosetuprebase")) {
1902 if (!value)
1903 return config_error_nonbool(var);
1904 else if (!strcmp(value, "never"))
1905 autorebase = AUTOREBASE_NEVER;
1906 else if (!strcmp(value, "local"))
1907 autorebase = AUTOREBASE_LOCAL;
1908 else if (!strcmp(value, "remote"))
1909 autorebase = AUTOREBASE_REMOTE;
1910 else if (!strcmp(value, "always"))
1911 autorebase = AUTOREBASE_ALWAYS;
1912 else
1913 return error(_("malformed value for %s"), var);
1914 return 0;
1915 }
1916
1917 /* Add other config variables here and to Documentation/config.txt. */
1918 return 0;
1919 }
1920
1921 static int git_default_push_config(const char *var, const char *value)
1922 {
1923 if (!strcmp(var, "push.default")) {
1924 if (!value)
1925 return config_error_nonbool(var);
1926 else if (!strcmp(value, "nothing"))
1927 push_default = PUSH_DEFAULT_NOTHING;
1928 else if (!strcmp(value, "matching"))
1929 push_default = PUSH_DEFAULT_MATCHING;
1930 else if (!strcmp(value, "simple"))
1931 push_default = PUSH_DEFAULT_SIMPLE;
1932 else if (!strcmp(value, "upstream"))
1933 push_default = PUSH_DEFAULT_UPSTREAM;
1934 else if (!strcmp(value, "tracking")) /* deprecated */
1935 push_default = PUSH_DEFAULT_UPSTREAM;
1936 else if (!strcmp(value, "current"))
1937 push_default = PUSH_DEFAULT_CURRENT;
1938 else {
1939 error(_("malformed value for %s: %s"), var, value);
1940 return error(_("must be one of nothing, matching, simple, "
1941 "upstream or current"));
1942 }
1943 return 0;
1944 }
1945
1946 /* Add other config variables here and to Documentation/config.txt. */
1947 return 0;
1948 }
1949
1950 static int git_default_mailmap_config(const char *var, const char *value)
1951 {
1952 if (!strcmp(var, "mailmap.file"))
1953 return git_config_pathname(&git_mailmap_file, var, value);
1954 if (!strcmp(var, "mailmap.blob"))
1955 return git_config_string(&git_mailmap_blob, var, value);
1956
1957 /* Add other config variables here and to Documentation/config.txt. */
1958 return 0;
1959 }
1960
1961 int git_default_config(const char *var, const char *value, void *cb)
1962 {
1963 if (starts_with(var, "core."))
1964 return git_default_core_config(var, value, cb);
1965
1966 if (starts_with(var, "user.") ||
1967 starts_with(var, "author.") ||
1968 starts_with(var, "committer."))
1969 return git_ident_config(var, value, cb);
1970
1971 if (starts_with(var, "i18n."))
1972 return git_default_i18n_config(var, value);
1973
1974 if (starts_with(var, "branch."))
1975 return git_default_branch_config(var, value);
1976
1977 if (starts_with(var, "push."))
1978 return git_default_push_config(var, value);
1979
1980 if (starts_with(var, "mailmap."))
1981 return git_default_mailmap_config(var, value);
1982
1983 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1984 return git_default_advice_config(var, value);
1985
1986 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1987 pager_use_color = git_config_bool(var,value);
1988 return 0;
1989 }
1990
1991 if (!strcmp(var, "pack.packsizelimit")) {
1992 pack_size_limit_cfg = git_config_ulong(var, value);
1993 return 0;
1994 }
1995
1996 if (!strcmp(var, "pack.compression")) {
1997 int level = git_config_int(var, value);
1998 if (level == -1)
1999 level = Z_DEFAULT_COMPRESSION;
2000 else if (level < 0 || level > Z_BEST_COMPRESSION)
2001 die(_("bad pack compression level %d"), level);
2002 pack_compression_level = level;
2003 pack_compression_seen = 1;
2004 return 0;
2005 }
2006
2007 if (starts_with(var, "sparse."))
2008 return git_default_sparse_config(var, value);
2009
2010 /* Add other config variables here and to Documentation/config.txt. */
2011 return 0;
2012 }
2013
2014 /*
2015 * All source specific fields in the union, die_on_error, name and the callbacks
2016 * fgetc, ungetc, ftell of top need to be initialized before calling
2017 * this function.
2018 */
2019 static int do_config_from(struct config_reader *reader,
2020 struct config_source *top, config_fn_t fn, void *data,
2021 const struct config_options *opts)
2022 {
2023 int ret;
2024
2025 /* push config-file parsing state stack */
2026 top->linenr = 1;
2027 top->eof = 0;
2028 top->total_len = 0;
2029 strbuf_init(&top->value, 1024);
2030 strbuf_init(&top->var, 1024);
2031 config_reader_push_source(reader, top);
2032
2033 ret = git_parse_source(top, fn, data, opts);
2034
2035 /* pop config-file parsing state stack */
2036 strbuf_release(&top->value);
2037 strbuf_release(&top->var);
2038 config_reader_pop_source(reader);
2039
2040 return ret;
2041 }
2042
2043 static int do_config_from_file(struct config_reader *reader,
2044 config_fn_t fn,
2045 const enum config_origin_type origin_type,
2046 const char *name, const char *path, FILE *f,
2047 void *data, const struct config_options *opts)
2048 {
2049 struct config_source top = CONFIG_SOURCE_INIT;
2050 int ret;
2051
2052 top.u.file = f;
2053 top.origin_type = origin_type;
2054 top.name = name;
2055 top.path = path;
2056 top.default_error_action = CONFIG_ERROR_DIE;
2057 top.do_fgetc = config_file_fgetc;
2058 top.do_ungetc = config_file_ungetc;
2059 top.do_ftell = config_file_ftell;
2060
2061 flockfile(f);
2062 ret = do_config_from(reader, &top, fn, data, opts);
2063 funlockfile(f);
2064 return ret;
2065 }
2066
2067 static int git_config_from_stdin(config_fn_t fn, void *data)
2068 {
2069 return do_config_from_file(&the_reader, fn, CONFIG_ORIGIN_STDIN, "",
2070 NULL, stdin, data, NULL);
2071 }
2072
2073 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
2074 void *data,
2075 const struct config_options *opts)
2076 {
2077 int ret = -1;
2078 FILE *f;
2079
2080 if (!filename)
2081 BUG("filename cannot be NULL");
2082 f = fopen_or_warn(filename, "r");
2083 if (f) {
2084 ret = do_config_from_file(&the_reader, fn, CONFIG_ORIGIN_FILE,
2085 filename, filename, f, data, opts);
2086 fclose(f);
2087 }
2088 return ret;
2089 }
2090
2091 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
2092 {
2093 return git_config_from_file_with_options(fn, filename, data, NULL);
2094 }
2095
2096 int git_config_from_mem(config_fn_t fn,
2097 const enum config_origin_type origin_type,
2098 const char *name, const char *buf, size_t len,
2099 void *data, const struct config_options *opts)
2100 {
2101 struct config_source top = CONFIG_SOURCE_INIT;
2102
2103 top.u.buf.buf = buf;
2104 top.u.buf.len = len;
2105 top.u.buf.pos = 0;
2106 top.origin_type = origin_type;
2107 top.name = name;
2108 top.path = NULL;
2109 top.default_error_action = CONFIG_ERROR_ERROR;
2110 top.do_fgetc = config_buf_fgetc;
2111 top.do_ungetc = config_buf_ungetc;
2112 top.do_ftell = config_buf_ftell;
2113
2114 return do_config_from(&the_reader, &top, fn, data, opts);
2115 }
2116
2117 int git_config_from_blob_oid(config_fn_t fn,
2118 const char *name,
2119 struct repository *repo,
2120 const struct object_id *oid,
2121 void *data)
2122 {
2123 enum object_type type;
2124 char *buf;
2125 unsigned long size;
2126 int ret;
2127
2128 buf = repo_read_object_file(repo, oid, &type, &size);
2129 if (!buf)
2130 return error(_("unable to load config blob object '%s'"), name);
2131 if (type != OBJ_BLOB) {
2132 free(buf);
2133 return error(_("reference '%s' does not point to a blob"), name);
2134 }
2135
2136 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
2137 data, NULL);
2138 free(buf);
2139
2140 return ret;
2141 }
2142
2143 static int git_config_from_blob_ref(config_fn_t fn,
2144 struct repository *repo,
2145 const char *name,
2146 void *data)
2147 {
2148 struct object_id oid;
2149
2150 if (repo_get_oid(repo, name, &oid) < 0)
2151 return error(_("unable to resolve config blob '%s'"), name);
2152 return git_config_from_blob_oid(fn, name, repo, &oid, data);
2153 }
2154
2155 char *git_system_config(void)
2156 {
2157 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
2158 if (!system_config)
2159 system_config = system_path(ETC_GITCONFIG);
2160 normalize_path_copy(system_config, system_config);
2161 return system_config;
2162 }
2163
2164 void git_global_config(char **user_out, char **xdg_out)
2165 {
2166 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
2167 char *xdg_config = NULL;
2168
2169 if (!user_config) {
2170 user_config = interpolate_path("~/.gitconfig", 0);
2171 xdg_config = xdg_config_home("config");
2172 }
2173
2174 *user_out = user_config;
2175 *xdg_out = xdg_config;
2176 }
2177
2178 /*
2179 * Parse environment variable 'k' as a boolean (in various
2180 * possible spellings); if missing, use the default value 'def'.
2181 */
2182 int git_env_bool(const char *k, int def)
2183 {
2184 const char *v = getenv(k);
2185 return v ? git_config_bool(k, v) : def;
2186 }
2187
2188 /*
2189 * Parse environment variable 'k' as ulong with possibly a unit
2190 * suffix; if missing, use the default value 'val'.
2191 */
2192 unsigned long git_env_ulong(const char *k, unsigned long val)
2193 {
2194 const char *v = getenv(k);
2195 if (v && !git_parse_ulong(v, &val))
2196 die(_("failed to parse %s"), k);
2197 return val;
2198 }
2199
2200 int git_config_system(void)
2201 {
2202 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
2203 }
2204
2205 static int do_git_config_sequence(struct config_reader *reader,
2206 const struct config_options *opts,
2207 config_fn_t fn, void *data)
2208 {
2209 int ret = 0;
2210 char *system_config = git_system_config();
2211 char *xdg_config = NULL;
2212 char *user_config = NULL;
2213 char *repo_config;
2214 enum config_scope prev_parsing_scope = reader->parsing_scope;
2215
2216 if (opts->commondir)
2217 repo_config = mkpathdup("%s/config", opts->commondir);
2218 else if (opts->git_dir)
2219 BUG("git_dir without commondir");
2220 else
2221 repo_config = NULL;
2222
2223 config_reader_set_scope(reader, CONFIG_SCOPE_SYSTEM);
2224 if (git_config_system() && system_config &&
2225 !access_or_die(system_config, R_OK,
2226 opts->system_gently ? ACCESS_EACCES_OK : 0))
2227 ret += git_config_from_file(fn, system_config, data);
2228
2229 config_reader_set_scope(reader, CONFIG_SCOPE_GLOBAL);
2230 git_global_config(&user_config, &xdg_config);
2231
2232 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
2233 ret += git_config_from_file(fn, xdg_config, data);
2234
2235 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
2236 ret += git_config_from_file(fn, user_config, data);
2237
2238 config_reader_set_scope(reader, CONFIG_SCOPE_LOCAL);
2239 if (!opts->ignore_repo && repo_config &&
2240 !access_or_die(repo_config, R_OK, 0))
2241 ret += git_config_from_file(fn, repo_config, data);
2242
2243 config_reader_set_scope(reader, CONFIG_SCOPE_WORKTREE);
2244 if (!opts->ignore_worktree && repository_format_worktree_config) {
2245 char *path = git_pathdup("config.worktree");
2246 if (!access_or_die(path, R_OK, 0))
2247 ret += git_config_from_file(fn, path, data);
2248 free(path);
2249 }
2250
2251 config_reader_set_scope(reader, CONFIG_SCOPE_COMMAND);
2252 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
2253 die(_("unable to parse command-line config"));
2254
2255 config_reader_set_scope(reader, prev_parsing_scope);
2256 free(system_config);
2257 free(xdg_config);
2258 free(user_config);
2259 free(repo_config);
2260 return ret;
2261 }
2262
2263 int config_with_options(config_fn_t fn, void *data,
2264 struct git_config_source *config_source,
2265 const struct config_options *opts)
2266 {
2267 struct config_include_data inc = CONFIG_INCLUDE_INIT;
2268 enum config_scope prev_scope = the_reader.parsing_scope;
2269 int ret;
2270
2271 if (opts->respect_includes) {
2272 inc.fn = fn;
2273 inc.data = data;
2274 inc.opts = opts;
2275 inc.config_source = config_source;
2276 inc.config_reader = &the_reader;
2277 fn = git_config_include;
2278 data = &inc;
2279 }
2280
2281 if (config_source)
2282 config_reader_set_scope(&the_reader, config_source->scope);
2283
2284 /*
2285 * If we have a specific filename, use it. Otherwise, follow the
2286 * regular lookup sequence.
2287 */
2288 if (config_source && config_source->use_stdin) {
2289 ret = git_config_from_stdin(fn, data);
2290 } else if (config_source && config_source->file) {
2291 ret = git_config_from_file(fn, config_source->file, data);
2292 } else if (config_source && config_source->blob) {
2293 struct repository *repo = config_source->repo ?
2294 config_source->repo : the_repository;
2295 ret = git_config_from_blob_ref(fn, repo, config_source->blob,
2296 data);
2297 } else {
2298 ret = do_git_config_sequence(&the_reader, opts, fn, data);
2299 }
2300
2301 if (inc.remote_urls) {
2302 string_list_clear(inc.remote_urls, 0);
2303 FREE_AND_NULL(inc.remote_urls);
2304 }
2305 config_reader_set_scope(&the_reader, prev_scope);
2306 return ret;
2307 }
2308
2309 static void configset_iter(struct config_reader *reader, struct config_set *set,
2310 config_fn_t fn, void *data)
2311 {
2312 int i, value_index;
2313 struct string_list *values;
2314 struct config_set_element *entry;
2315 struct configset_list *list = &set->list;
2316
2317 for (i = 0; i < list->nr; i++) {
2318 entry = list->items[i].e;
2319 value_index = list->items[i].value_index;
2320 values = &entry->value_list;
2321
2322 config_reader_set_kvi(reader, values->items[value_index].util);
2323
2324 if (fn(entry->key, values->items[value_index].string, data) < 0)
2325 git_die_config_linenr(entry->key,
2326 reader->config_kvi->filename,
2327 reader->config_kvi->linenr);
2328
2329 config_reader_set_kvi(reader, NULL);
2330 }
2331 }
2332
2333 void read_early_config(config_fn_t cb, void *data)
2334 {
2335 struct config_options opts = {0};
2336 struct strbuf commondir = STRBUF_INIT;
2337 struct strbuf gitdir = STRBUF_INIT;
2338
2339 opts.respect_includes = 1;
2340
2341 if (have_git_dir()) {
2342 opts.commondir = get_git_common_dir();
2343 opts.git_dir = get_git_dir();
2344 /*
2345 * When setup_git_directory() was not yet asked to discover the
2346 * GIT_DIR, we ask discover_git_directory() to figure out whether there
2347 * is any repository config we should use (but unlike
2348 * setup_git_directory_gently(), no global state is changed, most
2349 * notably, the current working directory is still the same after the
2350 * call).
2351 */
2352 } else if (!discover_git_directory(&commondir, &gitdir)) {
2353 opts.commondir = commondir.buf;
2354 opts.git_dir = gitdir.buf;
2355 }
2356
2357 config_with_options(cb, data, NULL, &opts);
2358
2359 strbuf_release(&commondir);
2360 strbuf_release(&gitdir);
2361 }
2362
2363 /*
2364 * Read config but only enumerate system and global settings.
2365 * Omit any repo-local, worktree-local, or command-line settings.
2366 */
2367 void read_very_early_config(config_fn_t cb, void *data)
2368 {
2369 struct config_options opts = { 0 };
2370
2371 opts.respect_includes = 1;
2372 opts.ignore_repo = 1;
2373 opts.ignore_worktree = 1;
2374 opts.ignore_cmdline = 1;
2375 opts.system_gently = 1;
2376
2377 config_with_options(cb, data, NULL, &opts);
2378 }
2379
2380 RESULT_MUST_BE_USED
2381 static int configset_find_element(struct config_set *set, const char *key,
2382 struct config_set_element **dest)
2383 {
2384 struct config_set_element k;
2385 struct config_set_element *found_entry;
2386 char *normalized_key;
2387 int ret;
2388
2389 /*
2390 * `key` may come from the user, so normalize it before using it
2391 * for querying entries from the hashmap.
2392 */
2393 ret = git_config_parse_key(key, &normalized_key, NULL);
2394 if (ret)
2395 return ret;
2396
2397 hashmap_entry_init(&k.ent, strhash(normalized_key));
2398 k.key = normalized_key;
2399 found_entry = hashmap_get_entry(&set->config_hash, &k, ent, NULL);
2400 free(normalized_key);
2401 *dest = found_entry;
2402 return 0;
2403 }
2404
2405 static int configset_add_value(struct config_reader *reader,
2406 struct config_set *set, const char *key,
2407 const char *value)
2408 {
2409 struct config_set_element *e;
2410 struct string_list_item *si;
2411 struct configset_list_item *l_item;
2412 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
2413 int ret;
2414
2415 ret = configset_find_element(set, key, &e);
2416 if (ret)
2417 return ret;
2418 /*
2419 * Since the keys are being fed by git_config*() callback mechanism, they
2420 * are already normalized. So simply add them without any further munging.
2421 */
2422 if (!e) {
2423 e = xmalloc(sizeof(*e));
2424 hashmap_entry_init(&e->ent, strhash(key));
2425 e->key = xstrdup(key);
2426 string_list_init_dup(&e->value_list);
2427 hashmap_add(&set->config_hash, &e->ent);
2428 }
2429 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
2430
2431 ALLOC_GROW(set->list.items, set->list.nr + 1, set->list.alloc);
2432 l_item = &set->list.items[set->list.nr++];
2433 l_item->e = e;
2434 l_item->value_index = e->value_list.nr - 1;
2435
2436 if (!reader->source)
2437 BUG("configset_add_value has no source");
2438 if (reader->source->name) {
2439 kv_info->filename = strintern(reader->source->name);
2440 kv_info->linenr = reader->source->linenr;
2441 kv_info->origin_type = reader->source->origin_type;
2442 } else {
2443 /* for values read from `git_config_from_parameters()` */
2444 kv_info->filename = NULL;
2445 kv_info->linenr = -1;
2446 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
2447 }
2448 kv_info->scope = reader->parsing_scope;
2449 si->util = kv_info;
2450
2451 return 0;
2452 }
2453
2454 static int config_set_element_cmp(const void *cmp_data UNUSED,
2455 const struct hashmap_entry *eptr,
2456 const struct hashmap_entry *entry_or_key,
2457 const void *keydata UNUSED)
2458 {
2459 const struct config_set_element *e1, *e2;
2460
2461 e1 = container_of(eptr, const struct config_set_element, ent);
2462 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2463
2464 return strcmp(e1->key, e2->key);
2465 }
2466
2467 void git_configset_init(struct config_set *set)
2468 {
2469 hashmap_init(&set->config_hash, config_set_element_cmp, NULL, 0);
2470 set->hash_initialized = 1;
2471 set->list.nr = 0;
2472 set->list.alloc = 0;
2473 set->list.items = NULL;
2474 }
2475
2476 void git_configset_clear(struct config_set *set)
2477 {
2478 struct config_set_element *entry;
2479 struct hashmap_iter iter;
2480 if (!set->hash_initialized)
2481 return;
2482
2483 hashmap_for_each_entry(&set->config_hash, &iter, entry,
2484 ent /* member name */) {
2485 free(entry->key);
2486 string_list_clear(&entry->value_list, 1);
2487 }
2488 hashmap_clear_and_free(&set->config_hash, struct config_set_element, ent);
2489 set->hash_initialized = 0;
2490 free(set->list.items);
2491 set->list.nr = 0;
2492 set->list.alloc = 0;
2493 set->list.items = NULL;
2494 }
2495
2496 struct configset_add_data {
2497 struct config_set *config_set;
2498 struct config_reader *config_reader;
2499 };
2500 #define CONFIGSET_ADD_INIT { 0 }
2501
2502 static int config_set_callback(const char *key, const char *value, void *cb)
2503 {
2504 struct configset_add_data *data = cb;
2505 configset_add_value(data->config_reader, data->config_set, key, value);
2506 return 0;
2507 }
2508
2509 int git_configset_add_file(struct config_set *set, const char *filename)
2510 {
2511 struct configset_add_data data = CONFIGSET_ADD_INIT;
2512 data.config_reader = &the_reader;
2513 data.config_set = set;
2514 return git_config_from_file(config_set_callback, filename, &data);
2515 }
2516
2517 int git_configset_get_value(struct config_set *set, const char *key, const char **value)
2518 {
2519 const struct string_list *values = NULL;
2520 int ret;
2521
2522 /*
2523 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2524 * queried key in the files of the configset, the value returned will be the last
2525 * value in the value list for that key.
2526 */
2527 if ((ret = git_configset_get_value_multi(set, key, &values)))
2528 return ret;
2529
2530 assert(values->nr > 0);
2531 *value = values->items[values->nr - 1].string;
2532 return 0;
2533 }
2534
2535 int git_configset_get_value_multi(struct config_set *set, const char *key,
2536 const struct string_list **dest)
2537 {
2538 struct config_set_element *e;
2539 int ret;
2540
2541 if ((ret = configset_find_element(set, key, &e)))
2542 return ret;
2543 else if (!e)
2544 return 1;
2545 *dest = &e->value_list;
2546
2547 return 0;
2548 }
2549
2550 static int check_multi_string(struct string_list_item *item, void *util)
2551 {
2552 return item->string ? 0 : config_error_nonbool(util);
2553 }
2554
2555 int git_configset_get_string_multi(struct config_set *cs, const char *key,
2556 const struct string_list **dest)
2557 {
2558 int ret;
2559
2560 if ((ret = git_configset_get_value_multi(cs, key, dest)))
2561 return ret;
2562 if ((ret = for_each_string_list((struct string_list *)*dest,
2563 check_multi_string, (void *)key)))
2564 return ret;
2565
2566 return 0;
2567 }
2568
2569 int git_configset_get(struct config_set *set, const char *key)
2570 {
2571 struct config_set_element *e;
2572 int ret;
2573
2574 if ((ret = configset_find_element(set, key, &e)))
2575 return ret;
2576 else if (!e)
2577 return 1;
2578 return 0;
2579 }
2580
2581 int git_configset_get_string(struct config_set *set, const char *key, char **dest)
2582 {
2583 const char *value;
2584 if (!git_configset_get_value(set, key, &value))
2585 return git_config_string((const char **)dest, key, value);
2586 else
2587 return 1;
2588 }
2589
2590 static int git_configset_get_string_tmp(struct config_set *set, const char *key,
2591 const char **dest)
2592 {
2593 const char *value;
2594 if (!git_configset_get_value(set, key, &value)) {
2595 if (!value)
2596 return config_error_nonbool(key);
2597 *dest = value;
2598 return 0;
2599 } else {
2600 return 1;
2601 }
2602 }
2603
2604 int git_configset_get_int(struct config_set *set, const char *key, int *dest)
2605 {
2606 const char *value;
2607 if (!git_configset_get_value(set, key, &value)) {
2608 *dest = git_config_int(key, value);
2609 return 0;
2610 } else
2611 return 1;
2612 }
2613
2614 int git_configset_get_ulong(struct config_set *set, const char *key, unsigned long *dest)
2615 {
2616 const char *value;
2617 if (!git_configset_get_value(set, key, &value)) {
2618 *dest = git_config_ulong(key, value);
2619 return 0;
2620 } else
2621 return 1;
2622 }
2623
2624 int git_configset_get_bool(struct config_set *set, const char *key, int *dest)
2625 {
2626 const char *value;
2627 if (!git_configset_get_value(set, key, &value)) {
2628 *dest = git_config_bool(key, value);
2629 return 0;
2630 } else
2631 return 1;
2632 }
2633
2634 int git_configset_get_bool_or_int(struct config_set *set, const char *key,
2635 int *is_bool, int *dest)
2636 {
2637 const char *value;
2638 if (!git_configset_get_value(set, key, &value)) {
2639 *dest = git_config_bool_or_int(key, value, is_bool);
2640 return 0;
2641 } else
2642 return 1;
2643 }
2644
2645 int git_configset_get_maybe_bool(struct config_set *set, const char *key, int *dest)
2646 {
2647 const char *value;
2648 if (!git_configset_get_value(set, key, &value)) {
2649 *dest = git_parse_maybe_bool(value);
2650 if (*dest == -1)
2651 return -1;
2652 return 0;
2653 } else
2654 return 1;
2655 }
2656
2657 int git_configset_get_pathname(struct config_set *set, const char *key, const char **dest)
2658 {
2659 const char *value;
2660 if (!git_configset_get_value(set, key, &value))
2661 return git_config_pathname(dest, key, value);
2662 else
2663 return 1;
2664 }
2665
2666 /* Functions use to read configuration from a repository */
2667 static void repo_read_config(struct repository *repo)
2668 {
2669 struct config_options opts = { 0 };
2670 struct configset_add_data data = CONFIGSET_ADD_INIT;
2671
2672 opts.respect_includes = 1;
2673 opts.commondir = repo->commondir;
2674 opts.git_dir = repo->gitdir;
2675
2676 if (!repo->config)
2677 CALLOC_ARRAY(repo->config, 1);
2678 else
2679 git_configset_clear(repo->config);
2680
2681 git_configset_init(repo->config);
2682 data.config_set = repo->config;
2683 data.config_reader = &the_reader;
2684
2685 if (config_with_options(config_set_callback, &data, NULL, &opts) < 0)
2686 /*
2687 * config_with_options() normally returns only
2688 * zero, as most errors are fatal, and
2689 * non-fatal potential errors are guarded by "if"
2690 * statements that are entered only when no error is
2691 * possible.
2692 *
2693 * If we ever encounter a non-fatal error, it means
2694 * something went really wrong and we should stop
2695 * immediately.
2696 */
2697 die(_("unknown error occurred while reading the configuration files"));
2698 }
2699
2700 static void git_config_check_init(struct repository *repo)
2701 {
2702 if (repo->config && repo->config->hash_initialized)
2703 return;
2704 repo_read_config(repo);
2705 }
2706
2707 static void repo_config_clear(struct repository *repo)
2708 {
2709 if (!repo->config || !repo->config->hash_initialized)
2710 return;
2711 git_configset_clear(repo->config);
2712 }
2713
2714 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2715 {
2716 git_config_check_init(repo);
2717 configset_iter(&the_reader, repo->config, fn, data);
2718 }
2719
2720 int repo_config_get(struct repository *repo, const char *key)
2721 {
2722 git_config_check_init(repo);
2723 return git_configset_get(repo->config, key);
2724 }
2725
2726 int repo_config_get_value(struct repository *repo,
2727 const char *key, const char **value)
2728 {
2729 git_config_check_init(repo);
2730 return git_configset_get_value(repo->config, key, value);
2731 }
2732
2733 int repo_config_get_value_multi(struct repository *repo, const char *key,
2734 const struct string_list **dest)
2735 {
2736 git_config_check_init(repo);
2737 return git_configset_get_value_multi(repo->config, key, dest);
2738 }
2739
2740 int repo_config_get_string_multi(struct repository *repo, const char *key,
2741 const struct string_list **dest)
2742 {
2743 git_config_check_init(repo);
2744 return git_configset_get_string_multi(repo->config, key, dest);
2745 }
2746
2747 int repo_config_get_string(struct repository *repo,
2748 const char *key, char **dest)
2749 {
2750 int ret;
2751 git_config_check_init(repo);
2752 ret = git_configset_get_string(repo->config, key, dest);
2753 if (ret < 0)
2754 git_die_config(key, NULL);
2755 return ret;
2756 }
2757
2758 int repo_config_get_string_tmp(struct repository *repo,
2759 const char *key, const char **dest)
2760 {
2761 int ret;
2762 git_config_check_init(repo);
2763 ret = git_configset_get_string_tmp(repo->config, key, dest);
2764 if (ret < 0)
2765 git_die_config(key, NULL);
2766 return ret;
2767 }
2768
2769 int repo_config_get_int(struct repository *repo,
2770 const char *key, int *dest)
2771 {
2772 git_config_check_init(repo);
2773 return git_configset_get_int(repo->config, key, dest);
2774 }
2775
2776 int repo_config_get_ulong(struct repository *repo,
2777 const char *key, unsigned long *dest)
2778 {
2779 git_config_check_init(repo);
2780 return git_configset_get_ulong(repo->config, key, dest);
2781 }
2782
2783 int repo_config_get_bool(struct repository *repo,
2784 const char *key, int *dest)
2785 {
2786 git_config_check_init(repo);
2787 return git_configset_get_bool(repo->config, key, dest);
2788 }
2789
2790 int repo_config_get_bool_or_int(struct repository *repo,
2791 const char *key, int *is_bool, int *dest)
2792 {
2793 git_config_check_init(repo);
2794 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2795 }
2796
2797 int repo_config_get_maybe_bool(struct repository *repo,
2798 const char *key, int *dest)
2799 {
2800 git_config_check_init(repo);
2801 return git_configset_get_maybe_bool(repo->config, key, dest);
2802 }
2803
2804 int repo_config_get_pathname(struct repository *repo,
2805 const char *key, const char **dest)
2806 {
2807 int ret;
2808 git_config_check_init(repo);
2809 ret = git_configset_get_pathname(repo->config, key, dest);
2810 if (ret < 0)
2811 git_die_config(key, NULL);
2812 return ret;
2813 }
2814
2815 /* Read values into protected_config. */
2816 static void read_protected_config(void)
2817 {
2818 struct config_options opts = {
2819 .respect_includes = 1,
2820 .ignore_repo = 1,
2821 .ignore_worktree = 1,
2822 .system_gently = 1,
2823 };
2824 struct configset_add_data data = CONFIGSET_ADD_INIT;
2825
2826 git_configset_init(&protected_config);
2827 data.config_set = &protected_config;
2828 data.config_reader = &the_reader;
2829 config_with_options(config_set_callback, &data, NULL, &opts);
2830 }
2831
2832 void git_protected_config(config_fn_t fn, void *data)
2833 {
2834 if (!protected_config.hash_initialized)
2835 read_protected_config();
2836 configset_iter(&the_reader, &protected_config, fn, data);
2837 }
2838
2839 /* Functions used historically to read configuration from 'the_repository' */
2840 void git_config(config_fn_t fn, void *data)
2841 {
2842 repo_config(the_repository, fn, data);
2843 }
2844
2845 void git_config_clear(void)
2846 {
2847 repo_config_clear(the_repository);
2848 }
2849
2850 int git_config_get(const char *key)
2851 {
2852 return repo_config_get(the_repository, key);
2853 }
2854
2855 int git_config_get_value(const char *key, const char **value)
2856 {
2857 return repo_config_get_value(the_repository, key, value);
2858 }
2859
2860 int git_config_get_value_multi(const char *key, const struct string_list **dest)
2861 {
2862 return repo_config_get_value_multi(the_repository, key, dest);
2863 }
2864
2865 int git_config_get_string_multi(const char *key,
2866 const struct string_list **dest)
2867 {
2868 return repo_config_get_string_multi(the_repository, key, dest);
2869 }
2870
2871 int git_config_get_string(const char *key, char **dest)
2872 {
2873 return repo_config_get_string(the_repository, key, dest);
2874 }
2875
2876 int git_config_get_string_tmp(const char *key, const char **dest)
2877 {
2878 return repo_config_get_string_tmp(the_repository, key, dest);
2879 }
2880
2881 int git_config_get_int(const char *key, int *dest)
2882 {
2883 return repo_config_get_int(the_repository, key, dest);
2884 }
2885
2886 int git_config_get_ulong(const char *key, unsigned long *dest)
2887 {
2888 return repo_config_get_ulong(the_repository, key, dest);
2889 }
2890
2891 int git_config_get_bool(const char *key, int *dest)
2892 {
2893 return repo_config_get_bool(the_repository, key, dest);
2894 }
2895
2896 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2897 {
2898 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2899 }
2900
2901 int git_config_get_maybe_bool(const char *key, int *dest)
2902 {
2903 return repo_config_get_maybe_bool(the_repository, key, dest);
2904 }
2905
2906 int git_config_get_pathname(const char *key, const char **dest)
2907 {
2908 return repo_config_get_pathname(the_repository, key, dest);
2909 }
2910
2911 int git_config_get_expiry(const char *key, const char **output)
2912 {
2913 int ret = git_config_get_string(key, (char **)output);
2914 if (ret)
2915 return ret;
2916 if (strcmp(*output, "now")) {
2917 timestamp_t now = approxidate("now");
2918 if (approxidate(*output) >= now)
2919 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2920 }
2921 return ret;
2922 }
2923
2924 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2925 {
2926 const char *expiry_string;
2927 intmax_t days;
2928 timestamp_t when;
2929
2930 if (git_config_get_string_tmp(key, &expiry_string))
2931 return 1; /* no such thing */
2932
2933 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2934 const int scale = 86400;
2935 *expiry = now - days * scale;
2936 return 0;
2937 }
2938
2939 if (!parse_expiry_date(expiry_string, &when)) {
2940 *expiry = when;
2941 return 0;
2942 }
2943 return -1; /* thing exists but cannot be parsed */
2944 }
2945
2946 int git_config_get_split_index(void)
2947 {
2948 int val;
2949
2950 if (!git_config_get_maybe_bool("core.splitindex", &val))
2951 return val;
2952
2953 return -1; /* default value */
2954 }
2955
2956 int git_config_get_max_percent_split_change(void)
2957 {
2958 int val = -1;
2959
2960 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2961 if (0 <= val && val <= 100)
2962 return val;
2963
2964 return error(_("splitIndex.maxPercentChange value '%d' "
2965 "should be between 0 and 100"), val);
2966 }
2967
2968 return -1; /* default value */
2969 }
2970
2971 int git_config_get_index_threads(int *dest)
2972 {
2973 int is_bool, val;
2974
2975 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2976 if (val) {
2977 *dest = val;
2978 return 0;
2979 }
2980
2981 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2982 if (is_bool)
2983 *dest = val ? 0 : 1;
2984 else
2985 *dest = val;
2986 return 0;
2987 }
2988
2989 return 1;
2990 }
2991
2992 NORETURN
2993 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2994 {
2995 if (!filename)
2996 die(_("unable to parse '%s' from command-line config"), key);
2997 else
2998 die(_("bad config variable '%s' in file '%s' at line %d"),
2999 key, filename, linenr);
3000 }
3001
3002 NORETURN __attribute__((format(printf, 2, 3)))
3003 void git_die_config(const char *key, const char *err, ...)
3004 {
3005 const struct string_list *values;
3006 struct key_value_info *kv_info;
3007 report_fn error_fn = get_error_routine();
3008
3009 if (err) {
3010 va_list params;
3011 va_start(params, err);
3012 error_fn(err, params);
3013 va_end(params);
3014 }
3015 if (git_config_get_value_multi(key, &values))
3016 BUG("for key '%s' we must have a value to report on", key);
3017 kv_info = values->items[values->nr - 1].util;
3018 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
3019 }
3020
3021 /*
3022 * Find all the stuff for git_config_set() below.
3023 */
3024
3025 struct config_store_data {
3026 struct config_reader *config_reader;
3027 size_t baselen;
3028 char *key;
3029 int do_not_match;
3030 const char *fixed_value;
3031 regex_t *value_pattern;
3032 int multi_replace;
3033 struct {
3034 size_t begin, end;
3035 enum config_event_t type;
3036 int is_keys_section;
3037 } *parsed;
3038 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
3039 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
3040 };
3041 #define CONFIG_STORE_INIT { 0 }
3042
3043 static void config_store_data_clear(struct config_store_data *store)
3044 {
3045 free(store->key);
3046 if (store->value_pattern != NULL &&
3047 store->value_pattern != CONFIG_REGEX_NONE) {
3048 regfree(store->value_pattern);
3049 free(store->value_pattern);
3050 }
3051 free(store->parsed);
3052 free(store->seen);
3053 memset(store, 0, sizeof(*store));
3054 }
3055
3056 static int matches(const char *key, const char *value,
3057 const struct config_store_data *store)
3058 {
3059 if (strcmp(key, store->key))
3060 return 0; /* not ours */
3061 if (store->fixed_value)
3062 return !strcmp(store->fixed_value, value);
3063 if (!store->value_pattern)
3064 return 1; /* always matches */
3065 if (store->value_pattern == CONFIG_REGEX_NONE)
3066 return 0; /* never matches */
3067
3068 return store->do_not_match ^
3069 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
3070 }
3071
3072 static int store_aux_event(enum config_event_t type,
3073 size_t begin, size_t end, void *data)
3074 {
3075 struct config_store_data *store = data;
3076 struct config_source *cs = store->config_reader->source;
3077
3078 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
3079 store->parsed[store->parsed_nr].begin = begin;
3080 store->parsed[store->parsed_nr].end = end;
3081 store->parsed[store->parsed_nr].type = type;
3082
3083 if (type == CONFIG_EVENT_SECTION) {
3084 int (*cmpfn)(const char *, const char *, size_t);
3085
3086 if (cs->var.len < 2 || cs->var.buf[cs->var.len - 1] != '.')
3087 return error(_("invalid section name '%s'"), cs->var.buf);
3088
3089 if (cs->subsection_case_sensitive)
3090 cmpfn = strncasecmp;
3091 else
3092 cmpfn = strncmp;
3093
3094 /* Is this the section we were looking for? */
3095 store->is_keys_section =
3096 store->parsed[store->parsed_nr].is_keys_section =
3097 cs->var.len - 1 == store->baselen &&
3098 !cmpfn(cs->var.buf, store->key, store->baselen);
3099 if (store->is_keys_section) {
3100 store->section_seen = 1;
3101 ALLOC_GROW(store->seen, store->seen_nr + 1,
3102 store->seen_alloc);
3103 store->seen[store->seen_nr] = store->parsed_nr;
3104 }
3105 }
3106
3107 store->parsed_nr++;
3108
3109 return 0;
3110 }
3111
3112 static int store_aux(const char *key, const char *value, void *cb)
3113 {
3114 struct config_store_data *store = cb;
3115
3116 if (store->key_seen) {
3117 if (matches(key, value, store)) {
3118 if (store->seen_nr == 1 && store->multi_replace == 0) {
3119 warning(_("%s has multiple values"), key);
3120 }
3121
3122 ALLOC_GROW(store->seen, store->seen_nr + 1,
3123 store->seen_alloc);
3124
3125 store->seen[store->seen_nr] = store->parsed_nr;
3126 store->seen_nr++;
3127 }
3128 } else if (store->is_keys_section) {
3129 /*
3130 * Do not increment matches yet: this may not be a match, but we
3131 * are in the desired section.
3132 */
3133 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
3134 store->seen[store->seen_nr] = store->parsed_nr;
3135 store->section_seen = 1;
3136
3137 if (matches(key, value, store)) {
3138 store->seen_nr++;
3139 store->key_seen = 1;
3140 }
3141 }
3142
3143 return 0;
3144 }
3145
3146 static int write_error(const char *filename)
3147 {
3148 error(_("failed to write new configuration file %s"), filename);
3149
3150 /* Same error code as "failed to rename". */
3151 return 4;
3152 }
3153
3154 static struct strbuf store_create_section(const char *key,
3155 const struct config_store_data *store)
3156 {
3157 const char *dot;
3158 size_t i;
3159 struct strbuf sb = STRBUF_INIT;
3160
3161 dot = memchr(key, '.', store->baselen);
3162 if (dot) {
3163 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
3164 for (i = dot - key + 1; i < store->baselen; i++) {
3165 if (key[i] == '"' || key[i] == '\\')
3166 strbuf_addch(&sb, '\\');
3167 strbuf_addch(&sb, key[i]);
3168 }
3169 strbuf_addstr(&sb, "\"]\n");
3170 } else {
3171 strbuf_addch(&sb, '[');
3172 strbuf_add(&sb, key, store->baselen);
3173 strbuf_addstr(&sb, "]\n");
3174 }
3175
3176 return sb;
3177 }
3178
3179 static ssize_t write_section(int fd, const char *key,
3180 const struct config_store_data *store)
3181 {
3182 struct strbuf sb = store_create_section(key, store);
3183 ssize_t ret;
3184
3185 ret = write_in_full(fd, sb.buf, sb.len);
3186 strbuf_release(&sb);
3187
3188 return ret;
3189 }
3190
3191 static ssize_t write_pair(int fd, const char *key, const char *value,
3192 const struct config_store_data *store)
3193 {
3194 int i;
3195 ssize_t ret;
3196 const char *quote = "";
3197 struct strbuf sb = STRBUF_INIT;
3198
3199 /*
3200 * Check to see if the value needs to be surrounded with a dq pair.
3201 * Note that problematic characters are always backslash-quoted; this
3202 * check is about not losing leading or trailing SP and strings that
3203 * follow beginning-of-comment characters (i.e. ';' and '#') by the
3204 * configuration parser.
3205 */
3206 if (value[0] == ' ')
3207 quote = "\"";
3208 for (i = 0; value[i]; i++)
3209 if (value[i] == ';' || value[i] == '#')
3210 quote = "\"";
3211 if (i && value[i - 1] == ' ')
3212 quote = "\"";
3213
3214 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
3215
3216 for (i = 0; value[i]; i++)
3217 switch (value[i]) {
3218 case '\n':
3219 strbuf_addstr(&sb, "\\n");
3220 break;
3221 case '\t':
3222 strbuf_addstr(&sb, "\\t");
3223 break;
3224 case '"':
3225 case '\\':
3226 strbuf_addch(&sb, '\\');
3227 /* fallthrough */
3228 default:
3229 strbuf_addch(&sb, value[i]);
3230 break;
3231 }
3232 strbuf_addf(&sb, "%s\n", quote);
3233
3234 ret = write_in_full(fd, sb.buf, sb.len);
3235 strbuf_release(&sb);
3236
3237 return ret;
3238 }
3239
3240 /*
3241 * If we are about to unset the last key(s) in a section, and if there are
3242 * no comments surrounding (or included in) the section, we will want to
3243 * extend begin/end to remove the entire section.
3244 *
3245 * Note: the parameter `seen_ptr` points to the index into the store.seen
3246 * array. * This index may be incremented if a section has more than one
3247 * entry (which all are to be removed).
3248 */
3249 static void maybe_remove_section(struct config_store_data *store,
3250 size_t *begin_offset, size_t *end_offset,
3251 int *seen_ptr)
3252 {
3253 size_t begin;
3254 int i, seen, section_seen = 0;
3255
3256 /*
3257 * First, ensure that this is the first key, and that there are no
3258 * comments before the entry nor before the section header.
3259 */
3260 seen = *seen_ptr;
3261 for (i = store->seen[seen]; i > 0; i--) {
3262 enum config_event_t type = store->parsed[i - 1].type;
3263
3264 if (type == CONFIG_EVENT_COMMENT)
3265 /* There is a comment before this entry or section */
3266 return;
3267 if (type == CONFIG_EVENT_ENTRY) {
3268 if (!section_seen)
3269 /* This is not the section's first entry. */
3270 return;
3271 /* We encountered no comment before the section. */
3272 break;
3273 }
3274 if (type == CONFIG_EVENT_SECTION) {
3275 if (!store->parsed[i - 1].is_keys_section)
3276 break;
3277 section_seen = 1;
3278 }
3279 }
3280 begin = store->parsed[i].begin;
3281
3282 /*
3283 * Next, make sure that we are removing the last key(s) in the section,
3284 * and that there are no comments that are possibly about the current
3285 * section.
3286 */
3287 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
3288 enum config_event_t type = store->parsed[i].type;
3289
3290 if (type == CONFIG_EVENT_COMMENT)
3291 return;
3292 if (type == CONFIG_EVENT_SECTION) {
3293 if (store->parsed[i].is_keys_section)
3294 continue;
3295 break;
3296 }
3297 if (type == CONFIG_EVENT_ENTRY) {
3298 if (++seen < store->seen_nr &&
3299 i == store->seen[seen])
3300 /* We want to remove this entry, too */
3301 continue;
3302 /* There is another entry in this section. */
3303 return;
3304 }
3305 }
3306
3307 /*
3308 * We are really removing the last entry/entries from this section, and
3309 * there are no enclosed or surrounding comments. Remove the entire,
3310 * now-empty section.
3311 */
3312 *seen_ptr = seen;
3313 *begin_offset = begin;
3314 if (i < store->parsed_nr)
3315 *end_offset = store->parsed[i].begin;
3316 else
3317 *end_offset = store->parsed[store->parsed_nr - 1].end;
3318 }
3319
3320 int git_config_set_in_file_gently(const char *config_filename,
3321 const char *key, const char *value)
3322 {
3323 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
3324 }
3325
3326 void git_config_set_in_file(const char *config_filename,
3327 const char *key, const char *value)
3328 {
3329 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
3330 }
3331
3332 int git_config_set_gently(const char *key, const char *value)
3333 {
3334 return git_config_set_multivar_gently(key, value, NULL, 0);
3335 }
3336
3337 int repo_config_set_worktree_gently(struct repository *r,
3338 const char *key, const char *value)
3339 {
3340 /* Only use worktree-specific config if it is already enabled. */
3341 if (repository_format_worktree_config) {
3342 char *file = repo_git_path(r, "config.worktree");
3343 int ret = git_config_set_multivar_in_file_gently(
3344 file, key, value, NULL, 0);
3345 free(file);
3346 return ret;
3347 }
3348 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3349 }
3350
3351 void git_config_set(const char *key, const char *value)
3352 {
3353 git_config_set_multivar(key, value, NULL, 0);
3354
3355 trace2_cmd_set_config(key, value);
3356 }
3357
3358 /*
3359 * If value==NULL, unset in (remove from) config,
3360 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
3361 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
3362 * (only add a new one)
3363 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
3364 * key/values are removed before a single new pair is written. If the
3365 * flag is not present, then replace only the first match.
3366 *
3367 * Returns 0 on success.
3368 *
3369 * This function does this:
3370 *
3371 * - it locks the config file by creating ".git/config.lock"
3372 *
3373 * - it then parses the config using store_aux() as validator to find
3374 * the position on the key/value pair to replace. If it is to be unset,
3375 * it must be found exactly once.
3376 *
3377 * - the config file is mmap()ed and the part before the match (if any) is
3378 * written to the lock file, then the changed part and the rest.
3379 *
3380 * - the config file is removed and the lock file rename()d to it.
3381 *
3382 */
3383 int git_config_set_multivar_in_file_gently(const char *config_filename,
3384 const char *key, const char *value,
3385 const char *value_pattern,
3386 unsigned flags)
3387 {
3388 int fd = -1, in_fd = -1;
3389 int ret;
3390 struct lock_file lock = LOCK_INIT;
3391 char *filename_buf = NULL;
3392 char *contents = NULL;
3393 size_t contents_sz;
3394 struct config_store_data store = CONFIG_STORE_INIT;
3395
3396 store.config_reader = &the_reader;
3397
3398 /* parse-key returns negative; flip the sign to feed exit(3) */
3399 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
3400 if (ret)
3401 goto out_free;
3402
3403 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
3404
3405 if (!config_filename)
3406 config_filename = filename_buf = git_pathdup("config");
3407
3408 /*
3409 * The lock serves a purpose in addition to locking: the new
3410 * contents of .git/config will be written into it.
3411 */
3412 fd = hold_lock_file_for_update(&lock, config_filename, 0);
3413 if (fd < 0) {
3414 error_errno(_("could not lock config file %s"), config_filename);
3415 ret = CONFIG_NO_LOCK;
3416 goto out_free;
3417 }
3418
3419 /*
3420 * If .git/config does not exist yet, write a minimal version.
3421 */
3422 in_fd = open(config_filename, O_RDONLY);
3423 if ( in_fd < 0 ) {
3424 if ( ENOENT != errno ) {
3425 error_errno(_("opening %s"), config_filename);
3426 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
3427 goto out_free;
3428 }
3429 /* if nothing to unset, error out */
3430 if (!value) {
3431 ret = CONFIG_NOTHING_SET;
3432 goto out_free;
3433 }
3434
3435 free(store.key);
3436 store.key = xstrdup(key);
3437 if (write_section(fd, key, &store) < 0 ||
3438 write_pair(fd, key, value, &store) < 0)
3439 goto write_err_out;
3440 } else {
3441 struct stat st;
3442 size_t copy_begin, copy_end;
3443 int i, new_line = 0;
3444 struct config_options opts;
3445
3446 if (!value_pattern)
3447 store.value_pattern = NULL;
3448 else if (value_pattern == CONFIG_REGEX_NONE)
3449 store.value_pattern = CONFIG_REGEX_NONE;
3450 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
3451 store.fixed_value = value_pattern;
3452 else {
3453 if (value_pattern[0] == '!') {
3454 store.do_not_match = 1;
3455 value_pattern++;
3456 } else
3457 store.do_not_match = 0;
3458
3459 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3460 if (regcomp(store.value_pattern, value_pattern,
3461 REG_EXTENDED)) {
3462 error(_("invalid pattern: %s"), value_pattern);
3463 FREE_AND_NULL(store.value_pattern);
3464 ret = CONFIG_INVALID_PATTERN;
3465 goto out_free;
3466 }
3467 }
3468
3469 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3470 store.parsed[0].end = 0;
3471
3472 memset(&opts, 0, sizeof(opts));
3473 opts.event_fn = store_aux_event;
3474 opts.event_fn_data = &store;
3475
3476 /*
3477 * After this, store.parsed will contain offsets of all the
3478 * parsed elements, and store.seen will contain a list of
3479 * matches, as indices into store.parsed.
3480 *
3481 * As a side effect, we make sure to transform only a valid
3482 * existing config file.
3483 */
3484 if (git_config_from_file_with_options(store_aux,
3485 config_filename,
3486 &store, &opts)) {
3487 error(_("invalid config file %s"), config_filename);
3488 ret = CONFIG_INVALID_FILE;
3489 goto out_free;
3490 }
3491
3492 /* if nothing to unset, or too many matches, error out */
3493 if ((store.seen_nr == 0 && value == NULL) ||
3494 (store.seen_nr > 1 && !store.multi_replace)) {
3495 ret = CONFIG_NOTHING_SET;
3496 goto out_free;
3497 }
3498
3499 if (fstat(in_fd, &st) == -1) {
3500 error_errno(_("fstat on %s failed"), config_filename);
3501 ret = CONFIG_INVALID_FILE;
3502 goto out_free;
3503 }
3504
3505 contents_sz = xsize_t(st.st_size);
3506 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3507 MAP_PRIVATE, in_fd, 0);
3508 if (contents == MAP_FAILED) {
3509 if (errno == ENODEV && S_ISDIR(st.st_mode))
3510 errno = EISDIR;
3511 error_errno(_("unable to mmap '%s'%s"),
3512 config_filename, mmap_os_err());
3513 ret = CONFIG_INVALID_FILE;
3514 contents = NULL;
3515 goto out_free;
3516 }
3517 close(in_fd);
3518 in_fd = -1;
3519
3520 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3521 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3522 ret = CONFIG_NO_WRITE;
3523 goto out_free;
3524 }
3525
3526 if (store.seen_nr == 0) {
3527 if (!store.seen_alloc) {
3528 /* Did not see key nor section */
3529 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3530 store.seen[0] = store.parsed_nr
3531 - !!store.parsed_nr;
3532 }
3533 store.seen_nr = 1;
3534 }
3535
3536 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3537 size_t replace_end;
3538 int j = store.seen[i];
3539
3540 new_line = 0;
3541 if (!store.key_seen) {
3542 copy_end = store.parsed[j].end;
3543 /* include '\n' when copying section header */
3544 if (copy_end > 0 && copy_end < contents_sz &&
3545 contents[copy_end - 1] != '\n' &&
3546 contents[copy_end] == '\n')
3547 copy_end++;
3548 replace_end = copy_end;
3549 } else {
3550 replace_end = store.parsed[j].end;
3551 copy_end = store.parsed[j].begin;
3552 if (!value)
3553 maybe_remove_section(&store,
3554 &copy_end,
3555 &replace_end, &i);
3556 /*
3557 * Swallow preceding white-space on the same
3558 * line.
3559 */
3560 while (copy_end > 0 ) {
3561 char c = contents[copy_end - 1];
3562
3563 if (isspace(c) && c != '\n')
3564 copy_end--;
3565 else
3566 break;
3567 }
3568 }
3569
3570 if (copy_end > 0 && contents[copy_end-1] != '\n')
3571 new_line = 1;
3572
3573 /* write the first part of the config */
3574 if (copy_end > copy_begin) {
3575 if (write_in_full(fd, contents + copy_begin,
3576 copy_end - copy_begin) < 0)
3577 goto write_err_out;
3578 if (new_line &&
3579 write_str_in_full(fd, "\n") < 0)
3580 goto write_err_out;
3581 }
3582 copy_begin = replace_end;
3583 }
3584
3585 /* write the pair (value == NULL means unset) */
3586 if (value) {
3587 if (!store.section_seen) {
3588 if (write_section(fd, key, &store) < 0)
3589 goto write_err_out;
3590 }
3591 if (write_pair(fd, key, value, &store) < 0)
3592 goto write_err_out;
3593 }
3594
3595 /* write the rest of the config */
3596 if (copy_begin < contents_sz)
3597 if (write_in_full(fd, contents + copy_begin,
3598 contents_sz - copy_begin) < 0)
3599 goto write_err_out;
3600
3601 munmap(contents, contents_sz);
3602 contents = NULL;
3603 }
3604
3605 if (commit_lock_file(&lock) < 0) {
3606 error_errno(_("could not write config file %s"), config_filename);
3607 ret = CONFIG_NO_WRITE;
3608 goto out_free;
3609 }
3610
3611 ret = 0;
3612
3613 /* Invalidate the config cache */
3614 git_config_clear();
3615
3616 out_free:
3617 rollback_lock_file(&lock);
3618 free(filename_buf);
3619 if (contents)
3620 munmap(contents, contents_sz);
3621 if (in_fd >= 0)
3622 close(in_fd);
3623 config_store_data_clear(&store);
3624 return ret;
3625
3626 write_err_out:
3627 ret = write_error(get_lock_file_path(&lock));
3628 goto out_free;
3629
3630 }
3631
3632 void git_config_set_multivar_in_file(const char *config_filename,
3633 const char *key, const char *value,
3634 const char *value_pattern, unsigned flags)
3635 {
3636 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
3637 value_pattern, flags))
3638 return;
3639 if (value)
3640 die(_("could not set '%s' to '%s'"), key, value);
3641 else
3642 die(_("could not unset '%s'"), key);
3643 }
3644
3645 int git_config_set_multivar_gently(const char *key, const char *value,
3646 const char *value_pattern, unsigned flags)
3647 {
3648 return repo_config_set_multivar_gently(the_repository, key, value,
3649 value_pattern, flags);
3650 }
3651
3652 int repo_config_set_multivar_gently(struct repository *r, const char *key,
3653 const char *value,
3654 const char *value_pattern, unsigned flags)
3655 {
3656 char *file = repo_git_path(r, "config");
3657 int res = git_config_set_multivar_in_file_gently(file,
3658 key, value,
3659 value_pattern,
3660 flags);
3661 free(file);
3662 return res;
3663 }
3664
3665 void git_config_set_multivar(const char *key, const char *value,
3666 const char *value_pattern, unsigned flags)
3667 {
3668 git_config_set_multivar_in_file(git_path("config"),
3669 key, value, value_pattern,
3670 flags);
3671 }
3672
3673 static size_t section_name_match (const char *buf, const char *name)
3674 {
3675 size_t i = 0, j = 0;
3676 int dot = 0;
3677 if (buf[i] != '[')
3678 return 0;
3679 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3680 if (!dot && isspace(buf[i])) {
3681 dot = 1;
3682 if (name[j++] != '.')
3683 break;
3684 for (i++; isspace(buf[i]); i++)
3685 ; /* do nothing */
3686 if (buf[i] != '"')
3687 break;
3688 continue;
3689 }
3690 if (buf[i] == '\\' && dot)
3691 i++;
3692 else if (buf[i] == '"' && dot) {
3693 for (i++; isspace(buf[i]); i++)
3694 ; /* do_nothing */
3695 break;
3696 }
3697 if (buf[i] != name[j++])
3698 break;
3699 }
3700 if (buf[i] == ']' && name[j] == 0) {
3701 /*
3702 * We match, now just find the right length offset by
3703 * gobbling up any whitespace after it, as well
3704 */
3705 i++;
3706 for (; buf[i] && isspace(buf[i]); i++)
3707 ; /* do nothing */
3708 return i;
3709 }
3710 return 0;
3711 }
3712
3713 static int section_name_is_ok(const char *name)
3714 {
3715 /* Empty section names are bogus. */
3716 if (!*name)
3717 return 0;
3718
3719 /*
3720 * Before a dot, we must be alphanumeric or dash. After the first dot,
3721 * anything goes, so we can stop checking.
3722 */
3723 for (; *name && *name != '.'; name++)
3724 if (*name != '-' && !isalnum(*name))
3725 return 0;
3726 return 1;
3727 }
3728
3729 #define GIT_CONFIG_MAX_LINE_LEN (512 * 1024)
3730
3731 /* if new_name == NULL, the section is removed instead */
3732 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3733 const char *old_name,
3734 const char *new_name, int copy)
3735 {
3736 int ret = 0, remove = 0;
3737 char *filename_buf = NULL;
3738 struct lock_file lock = LOCK_INIT;
3739 int out_fd;
3740 struct strbuf buf = STRBUF_INIT;
3741 FILE *config_file = NULL;
3742 struct stat st;
3743 struct strbuf copystr = STRBUF_INIT;
3744 struct config_store_data store;
3745 uint32_t line_nr = 0;
3746
3747 memset(&store, 0, sizeof(store));
3748
3749 if (new_name && !section_name_is_ok(new_name)) {
3750 ret = error(_("invalid section name: %s"), new_name);
3751 goto out_no_rollback;
3752 }
3753
3754 if (!config_filename)
3755 config_filename = filename_buf = git_pathdup("config");
3756
3757 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3758 if (out_fd < 0) {
3759 ret = error(_("could not lock config file %s"), config_filename);
3760 goto out;
3761 }
3762
3763 if (!(config_file = fopen(config_filename, "rb"))) {
3764 ret = warn_on_fopen_errors(config_filename);
3765 if (ret)
3766 goto out;
3767 /* no config file means nothing to rename, no error */
3768 goto commit_and_out;
3769 }
3770
3771 if (fstat(fileno(config_file), &st) == -1) {
3772 ret = error_errno(_("fstat on %s failed"), config_filename);
3773 goto out;
3774 }
3775
3776 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3777 ret = error_errno(_("chmod on %s failed"),
3778 get_lock_file_path(&lock));
3779 goto out;
3780 }
3781
3782 while (!strbuf_getwholeline(&buf, config_file, '\n')) {
3783 size_t i, length;
3784 int is_section = 0;
3785 char *output = buf.buf;
3786
3787 line_nr++;
3788
3789 if (buf.len >= GIT_CONFIG_MAX_LINE_LEN) {
3790 ret = error(_("refusing to work with overly long line "
3791 "in '%s' on line %"PRIuMAX),
3792 config_filename, (uintmax_t)line_nr);
3793 goto out;
3794 }
3795
3796 for (i = 0; buf.buf[i] && isspace(buf.buf[i]); i++)
3797 ; /* do nothing */
3798 if (buf.buf[i] == '[') {
3799 /* it's a section */
3800 size_t offset;
3801 is_section = 1;
3802
3803 /*
3804 * When encountering a new section under -c we
3805 * need to flush out any section we're already
3806 * coping and begin anew. There might be
3807 * multiple [branch "$name"] sections.
3808 */
3809 if (copystr.len > 0) {
3810 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3811 ret = write_error(get_lock_file_path(&lock));
3812 goto out;
3813 }
3814 strbuf_reset(&copystr);
3815 }
3816
3817 offset = section_name_match(&buf.buf[i], old_name);
3818 if (offset > 0) {
3819 ret++;
3820 if (!new_name) {
3821 remove = 1;
3822 continue;
3823 }
3824 store.baselen = strlen(new_name);
3825 if (!copy) {
3826 if (write_section(out_fd, new_name, &store) < 0) {
3827 ret = write_error(get_lock_file_path(&lock));
3828 goto out;
3829 }
3830 /*
3831 * We wrote out the new section, with
3832 * a newline, now skip the old
3833 * section's length
3834 */
3835 output += offset + i;
3836 if (strlen(output) > 0) {
3837 /*
3838 * More content means there's
3839 * a declaration to put on the
3840 * next line; indent with a
3841 * tab
3842 */
3843 output -= 1;
3844 output[0] = '\t';
3845 }
3846 } else {
3847 copystr = store_create_section(new_name, &store);
3848 }
3849 }
3850 remove = 0;
3851 }
3852 if (remove)
3853 continue;
3854 length = strlen(output);
3855
3856 if (!is_section && copystr.len > 0) {
3857 strbuf_add(&copystr, output, length);
3858 }
3859
3860 if (write_in_full(out_fd, output, length) < 0) {
3861 ret = write_error(get_lock_file_path(&lock));
3862 goto out;
3863 }
3864 }
3865
3866 /*
3867 * Copy a trailing section at the end of the config, won't be
3868 * flushed by the usual "flush because we have a new section
3869 * logic in the loop above.
3870 */
3871 if (copystr.len > 0) {
3872 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3873 ret = write_error(get_lock_file_path(&lock));
3874 goto out;
3875 }
3876 strbuf_reset(&copystr);
3877 }
3878
3879 fclose(config_file);
3880 config_file = NULL;
3881 commit_and_out:
3882 if (commit_lock_file(&lock) < 0)
3883 ret = error_errno(_("could not write config file %s"),
3884 config_filename);
3885 out:
3886 if (config_file)
3887 fclose(config_file);
3888 rollback_lock_file(&lock);
3889 out_no_rollback:
3890 free(filename_buf);
3891 config_store_data_clear(&store);
3892 strbuf_release(&buf);
3893 return ret;
3894 }
3895
3896 int git_config_rename_section_in_file(const char *config_filename,
3897 const char *old_name, const char *new_name)
3898 {
3899 return git_config_copy_or_rename_section_in_file(config_filename,
3900 old_name, new_name, 0);
3901 }
3902
3903 int git_config_rename_section(const char *old_name, const char *new_name)
3904 {
3905 return git_config_rename_section_in_file(NULL, old_name, new_name);
3906 }
3907
3908 int git_config_copy_section_in_file(const char *config_filename,
3909 const char *old_name, const char *new_name)
3910 {
3911 return git_config_copy_or_rename_section_in_file(config_filename,
3912 old_name, new_name, 1);
3913 }
3914
3915 int git_config_copy_section(const char *old_name, const char *new_name)
3916 {
3917 return git_config_copy_section_in_file(NULL, old_name, new_name);
3918 }
3919
3920 /*
3921 * Call this to report error for your variable that should not
3922 * get a boolean value (i.e. "[my] var" means "true").
3923 */
3924 #undef config_error_nonbool
3925 int config_error_nonbool(const char *var)
3926 {
3927 return error(_("missing value for '%s'"), var);
3928 }
3929
3930 int parse_config_key(const char *var,
3931 const char *section,
3932 const char **subsection, size_t *subsection_len,
3933 const char **key)
3934 {
3935 const char *dot;
3936
3937 /* Does it start with "section." ? */
3938 if (!skip_prefix(var, section, &var) || *var != '.')
3939 return -1;
3940
3941 /*
3942 * Find the key; we don't know yet if we have a subsection, but we must
3943 * parse backwards from the end, since the subsection may have dots in
3944 * it, too.
3945 */
3946 dot = strrchr(var, '.');
3947 *key = dot + 1;
3948
3949 /* Did we have a subsection at all? */
3950 if (dot == var) {
3951 if (subsection) {
3952 *subsection = NULL;
3953 *subsection_len = 0;
3954 }
3955 }
3956 else {
3957 if (!subsection)
3958 return -1;
3959 *subsection = var + 1;
3960 *subsection_len = dot - *subsection;
3961 }
3962
3963 return 0;
3964 }
3965
3966 static int reader_origin_type(struct config_reader *reader,
3967 enum config_origin_type *type)
3968 {
3969 if (the_reader.config_kvi)
3970 *type = reader->config_kvi->origin_type;
3971 else if(the_reader.source)
3972 *type = reader->source->origin_type;
3973 else
3974 return 1;
3975 return 0;
3976 }
3977
3978 const char *current_config_origin_type(void)
3979 {
3980 enum config_origin_type type = CONFIG_ORIGIN_UNKNOWN;
3981
3982 if (reader_origin_type(&the_reader, &type))
3983 BUG("current_config_origin_type called outside config callback");
3984
3985 switch (type) {
3986 case CONFIG_ORIGIN_BLOB:
3987 return "blob";
3988 case CONFIG_ORIGIN_FILE:
3989 return "file";
3990 case CONFIG_ORIGIN_STDIN:
3991 return "standard input";
3992 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3993 return "submodule-blob";
3994 case CONFIG_ORIGIN_CMDLINE:
3995 return "command line";
3996 default:
3997 BUG("unknown config origin type");
3998 }
3999 }
4000
4001 const char *config_scope_name(enum config_scope scope)
4002 {
4003 switch (scope) {
4004 case CONFIG_SCOPE_SYSTEM:
4005 return "system";
4006 case CONFIG_SCOPE_GLOBAL:
4007 return "global";
4008 case CONFIG_SCOPE_LOCAL:
4009 return "local";
4010 case CONFIG_SCOPE_WORKTREE:
4011 return "worktree";
4012 case CONFIG_SCOPE_COMMAND:
4013 return "command";
4014 case CONFIG_SCOPE_SUBMODULE:
4015 return "submodule";
4016 default:
4017 return "unknown";
4018 }
4019 }
4020
4021 static int reader_config_name(struct config_reader *reader, const char **out)
4022 {
4023 if (the_reader.config_kvi)
4024 *out = reader->config_kvi->filename;
4025 else if (the_reader.source)
4026 *out = reader->source->name;
4027 else
4028 return 1;
4029 return 0;
4030 }
4031
4032 const char *current_config_name(void)
4033 {
4034 const char *name;
4035 if (reader_config_name(&the_reader, &name))
4036 BUG("current_config_name called outside config callback");
4037 return name ? name : "";
4038 }
4039
4040 enum config_scope current_config_scope(void)
4041 {
4042 if (the_reader.config_kvi)
4043 return the_reader.config_kvi->scope;
4044 else
4045 return the_reader.parsing_scope;
4046 }
4047
4048 int current_config_line(void)
4049 {
4050 if (the_reader.config_kvi)
4051 return the_reader.config_kvi->linenr;
4052 else
4053 return the_reader.source->linenr;
4054 }
4055
4056 int lookup_config(const char **mapping, int nr_mapping, const char *var)
4057 {
4058 int i;
4059
4060 for (i = 0; i < nr_mapping; i++) {
4061 const char *name = mapping[i];
4062
4063 if (name && !strcasecmp(var, name))
4064 return i;
4065 }
4066 return -1;
4067 }
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