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config: add kvi.path, use it to evaluate includes
[git.git] / config.c
blob8d342d8425501269023db0460f347967470f8c43
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 struct config_source *source;
78 };
79 /*
80 * Where possible, prefer to accept "struct config_reader" as an arg than to use
81 * "the_reader". "the_reader" should only be used if that is infeasible, e.g. in
82 * a public function.
83 */
84 static struct config_reader the_reader;
85
86 static inline void config_reader_push_source(struct config_reader *reader,
87 struct config_source *top)
88 {
89 top->prev = reader->source;
90 reader->source = top;
91 }
92
93 static inline struct config_source *config_reader_pop_source(struct config_reader *reader)
94 {
95 struct config_source *ret;
96 if (!reader->source)
97 BUG("tried to pop config source, but we weren't reading config");
98 ret = reader->source;
99 reader->source = reader->source->prev;
100 return ret;
101 }
102
103 static int pack_compression_seen;
104 static int zlib_compression_seen;
105
106 /*
107 * Config that comes from trusted scopes, namely:
108 * - CONFIG_SCOPE_SYSTEM (e.g. /etc/gitconfig)
109 * - CONFIG_SCOPE_GLOBAL (e.g. $HOME/.gitconfig, $XDG_CONFIG_HOME/git)
110 * - CONFIG_SCOPE_COMMAND (e.g. "-c" option, environment variables)
111 *
112 * This is declared here for code cleanliness, but unlike the other
113 * static variables, this does not hold config parser state.
114 */
115 static struct config_set protected_config;
116
117 static int config_file_fgetc(struct config_source *conf)
118 {
119 return getc_unlocked(conf->u.file);
120 }
121
122 static int config_file_ungetc(int c, struct config_source *conf)
123 {
124 return ungetc(c, conf->u.file);
125 }
126
127 static long config_file_ftell(struct config_source *conf)
128 {
129 return ftell(conf->u.file);
130 }
131
132
133 static int config_buf_fgetc(struct config_source *conf)
134 {
135 if (conf->u.buf.pos < conf->u.buf.len)
136 return conf->u.buf.buf[conf->u.buf.pos++];
137
138 return EOF;
139 }
140
141 static int config_buf_ungetc(int c, struct config_source *conf)
142 {
143 if (conf->u.buf.pos > 0) {
144 conf->u.buf.pos--;
145 if (conf->u.buf.buf[conf->u.buf.pos] != c)
146 BUG("config_buf can only ungetc the same character");
147 return c;
148 }
149
150 return EOF;
151 }
152
153 static long config_buf_ftell(struct config_source *conf)
154 {
155 return conf->u.buf.pos;
156 }
157
158 struct config_include_data {
159 int depth;
160 config_fn_t fn;
161 void *data;
162 const struct config_options *opts;
163 struct git_config_source *config_source;
164 struct repository *repo;
165
166 /*
167 * All remote URLs discovered when reading all config files.
168 */
169 struct string_list *remote_urls;
170 };
171 #define CONFIG_INCLUDE_INIT { 0 }
172
173 static int git_config_include(const char *var, const char *value,
174 const struct config_context *ctx, void *data);
175
176 #define MAX_INCLUDE_DEPTH 10
177 static const char include_depth_advice[] = N_(
178 "exceeded maximum include depth (%d) while including\n"
179 " %s\n"
180 "from\n"
181 " %s\n"
182 "This might be due to circular includes.");
183 static int handle_path_include(const struct key_value_info *kvi,
184 const char *path,
185 struct config_include_data *inc)
186 {
187 int ret = 0;
188 struct strbuf buf = STRBUF_INIT;
189 char *expanded;
190
191 if (!path)
192 return config_error_nonbool("include.path");
193
194 expanded = interpolate_path(path, 0);
195 if (!expanded)
196 return error(_("could not expand include path '%s'"), path);
197 path = expanded;
198
199 /*
200 * Use an absolute path as-is, but interpret relative paths
201 * based on the including config file.
202 */
203 if (!is_absolute_path(path)) {
204 char *slash;
205
206 if (!kvi || !kvi->path) {
207 ret = error(_("relative config includes must come from files"));
208 goto cleanup;
209 }
210
211 slash = find_last_dir_sep(kvi->path);
212 if (slash)
213 strbuf_add(&buf, kvi->path, slash - kvi->path + 1);
214 strbuf_addstr(&buf, path);
215 path = buf.buf;
216 }
217
218 if (!access_or_die(path, R_OK, 0)) {
219 if (++inc->depth > MAX_INCLUDE_DEPTH)
220 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
221 !kvi ? "<unknown>" :
222 kvi->filename ? kvi->filename :
223 "the command line");
224 ret = git_config_from_file_with_options(git_config_include, path, inc,
225 kvi->scope, NULL);
226 inc->depth--;
227 }
228 cleanup:
229 strbuf_release(&buf);
230 free(expanded);
231 return ret;
232 }
233
234 static void add_trailing_starstar_for_dir(struct strbuf *pat)
235 {
236 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
237 strbuf_addstr(pat, "**");
238 }
239
240 static int prepare_include_condition_pattern(const struct key_value_info *kvi,
241 struct strbuf *pat)
242 {
243 struct strbuf path = STRBUF_INIT;
244 char *expanded;
245 int prefix = 0;
246
247 expanded = interpolate_path(pat->buf, 1);
248 if (expanded) {
249 strbuf_reset(pat);
250 strbuf_addstr(pat, expanded);
251 free(expanded);
252 }
253
254 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
255 const char *slash;
256
257 if (!kvi || !kvi->path)
258 return error(_("relative config include "
259 "conditionals must come from files"));
260
261 strbuf_realpath(&path, kvi->path, 1);
262 slash = find_last_dir_sep(path.buf);
263 if (!slash)
264 BUG("how is this possible?");
265 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
266 prefix = slash - path.buf + 1 /* slash */;
267 } else if (!is_absolute_path(pat->buf))
268 strbuf_insertstr(pat, 0, "**/");
269
270 add_trailing_starstar_for_dir(pat);
271
272 strbuf_release(&path);
273 return prefix;
274 }
275
276 static int include_by_gitdir(const struct key_value_info *kvi,
277 const struct config_options *opts,
278 const char *cond, size_t cond_len, int icase)
279 {
280 struct strbuf text = STRBUF_INIT;
281 struct strbuf pattern = STRBUF_INIT;
282 int ret = 0, prefix;
283 const char *git_dir;
284 int already_tried_absolute = 0;
285
286 if (opts->git_dir)
287 git_dir = opts->git_dir;
288 else
289 goto done;
290
291 strbuf_realpath(&text, git_dir, 1);
292 strbuf_add(&pattern, cond, cond_len);
293 prefix = prepare_include_condition_pattern(kvi, &pattern);
294
295 again:
296 if (prefix < 0)
297 goto done;
298
299 if (prefix > 0) {
300 /*
301 * perform literal matching on the prefix part so that
302 * any wildcard character in it can't create side effects.
303 */
304 if (text.len < prefix)
305 goto done;
306 if (!icase && strncmp(pattern.buf, text.buf, prefix))
307 goto done;
308 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
309 goto done;
310 }
311
312 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
313 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
314
315 if (!ret && !already_tried_absolute) {
316 /*
317 * We've tried e.g. matching gitdir:~/work, but if
318 * ~/work is a symlink to /mnt/storage/work
319 * strbuf_realpath() will expand it, so the rule won't
320 * match. Let's match against a
321 * strbuf_add_absolute_path() version of the path,
322 * which'll do the right thing
323 */
324 strbuf_reset(&text);
325 strbuf_add_absolute_path(&text, git_dir);
326 already_tried_absolute = 1;
327 goto again;
328 }
329 done:
330 strbuf_release(&pattern);
331 strbuf_release(&text);
332 return ret;
333 }
334
335 static int include_by_branch(const char *cond, size_t cond_len)
336 {
337 int flags;
338 int ret;
339 struct strbuf pattern = STRBUF_INIT;
340 const char *refname = !the_repository->gitdir ?
341 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
342 const char *shortname;
343
344 if (!refname || !(flags & REF_ISSYMREF) ||
345 !skip_prefix(refname, "refs/heads/", &shortname))
346 return 0;
347
348 strbuf_add(&pattern, cond, cond_len);
349 add_trailing_starstar_for_dir(&pattern);
350 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
351 strbuf_release(&pattern);
352 return ret;
353 }
354
355 static int add_remote_url(const char *var, const char *value,
356 const struct config_context *ctx UNUSED, void *data)
357 {
358 struct string_list *remote_urls = data;
359 const char *remote_name;
360 size_t remote_name_len;
361 const char *key;
362
363 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
364 &key) &&
365 remote_name &&
366 !strcmp(key, "url"))
367 string_list_append(remote_urls, value);
368 return 0;
369 }
370
371 static void populate_remote_urls(struct config_include_data *inc)
372 {
373 struct config_options opts;
374
375 opts = *inc->opts;
376 opts.unconditional_remote_url = 1;
377
378 inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
379 string_list_init_dup(inc->remote_urls);
380 config_with_options(add_remote_url, inc->remote_urls,
381 inc->config_source, inc->repo, &opts);
382 }
383
384 static int forbid_remote_url(const char *var, const char *value UNUSED,
385 const struct config_context *ctx UNUSED,
386 void *data UNUSED)
387 {
388 const char *remote_name;
389 size_t remote_name_len;
390 const char *key;
391
392 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
393 &key) &&
394 remote_name &&
395 !strcmp(key, "url"))
396 die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url"));
397 return 0;
398 }
399
400 static int at_least_one_url_matches_glob(const char *glob, int glob_len,
401 struct string_list *remote_urls)
402 {
403 struct strbuf pattern = STRBUF_INIT;
404 struct string_list_item *url_item;
405 int found = 0;
406
407 strbuf_add(&pattern, glob, glob_len);
408 for_each_string_list_item(url_item, remote_urls) {
409 if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) {
410 found = 1;
411 break;
412 }
413 }
414 strbuf_release(&pattern);
415 return found;
416 }
417
418 static int include_by_remote_url(struct config_include_data *inc,
419 const char *cond, size_t cond_len)
420 {
421 if (inc->opts->unconditional_remote_url)
422 return 1;
423 if (!inc->remote_urls)
424 populate_remote_urls(inc);
425 return at_least_one_url_matches_glob(cond, cond_len,
426 inc->remote_urls);
427 }
428
429 static int include_condition_is_true(const struct key_value_info *kvi,
430 struct config_include_data *inc,
431 const char *cond, size_t cond_len)
432 {
433 const struct config_options *opts = inc->opts;
434
435 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
436 return include_by_gitdir(kvi, opts, cond, cond_len, 0);
437 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
438 return include_by_gitdir(kvi, opts, cond, cond_len, 1);
439 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
440 return include_by_branch(cond, cond_len);
441 else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond,
442 &cond_len))
443 return include_by_remote_url(inc, cond, cond_len);
444
445 /* unknown conditionals are always false */
446 return 0;
447 }
448
449 static int git_config_include(const char *var, const char *value,
450 const struct config_context *ctx,
451 void *data)
452 {
453 struct config_include_data *inc = data;
454 const char *cond, *key;
455 size_t cond_len;
456 int ret;
457
458 /*
459 * Pass along all values, including "include" directives; this makes it
460 * possible to query information on the includes themselves.
461 */
462 ret = inc->fn(var, value, ctx, inc->data);
463 if (ret < 0)
464 return ret;
465
466 if (!strcmp(var, "include.path"))
467 ret = handle_path_include(ctx->kvi, value, inc);
468
469 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
470 cond && include_condition_is_true(ctx->kvi, inc, cond, cond_len) &&
471 !strcmp(key, "path")) {
472 config_fn_t old_fn = inc->fn;
473
474 if (inc->opts->unconditional_remote_url)
475 inc->fn = forbid_remote_url;
476 ret = handle_path_include(ctx->kvi, value, inc);
477 inc->fn = old_fn;
478 }
479
480 return ret;
481 }
482
483 static void git_config_push_split_parameter(const char *key, const char *value)
484 {
485 struct strbuf env = STRBUF_INIT;
486 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
487 if (old && *old) {
488 strbuf_addstr(&env, old);
489 strbuf_addch(&env, ' ');
490 }
491 sq_quote_buf(&env, key);
492 strbuf_addch(&env, '=');
493 if (value)
494 sq_quote_buf(&env, value);
495 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
496 strbuf_release(&env);
497 }
498
499 void git_config_push_parameter(const char *text)
500 {
501 const char *value;
502
503 /*
504 * When we see:
505 *
506 * section.subsection=with=equals.key=value
507 *
508 * we cannot tell if it means:
509 *
510 * [section "subsection=with=equals"]
511 * key = value
512 *
513 * or:
514 *
515 * [section]
516 * subsection = with=equals.key=value
517 *
518 * We parse left-to-right for the first "=", meaning we'll prefer to
519 * keep the value intact over the subsection. This is historical, but
520 * also sensible since values are more likely to contain odd or
521 * untrusted input than a section name.
522 *
523 * A missing equals is explicitly allowed (as a bool-only entry).
524 */
525 value = strchr(text, '=');
526 if (value) {
527 char *key = xmemdupz(text, value - text);
528 git_config_push_split_parameter(key, value + 1);
529 free(key);
530 } else {
531 git_config_push_split_parameter(text, NULL);
532 }
533 }
534
535 void git_config_push_env(const char *spec)
536 {
537 char *key;
538 const char *env_name;
539 const char *env_value;
540
541 env_name = strrchr(spec, '=');
542 if (!env_name)
543 die(_("invalid config format: %s"), spec);
544 key = xmemdupz(spec, env_name - spec);
545 env_name++;
546 if (!*env_name)
547 die(_("missing environment variable name for configuration '%.*s'"),
548 (int)(env_name - spec - 1), spec);
549
550 env_value = getenv(env_name);
551 if (!env_value)
552 die(_("missing environment variable '%s' for configuration '%.*s'"),
553 env_name, (int)(env_name - spec - 1), spec);
554
555 git_config_push_split_parameter(key, env_value);
556 free(key);
557 }
558
559 static inline int iskeychar(int c)
560 {
561 return isalnum(c) || c == '-';
562 }
563
564 /*
565 * Auxiliary function to sanity-check and split the key into the section
566 * identifier and variable name.
567 *
568 * Returns 0 on success, -1 when there is an invalid character in the key and
569 * -2 if there is no section name in the key.
570 *
571 * store_key - pointer to char* which will hold a copy of the key with
572 * lowercase section and variable name
573 * baselen - pointer to size_t which will hold the length of the
574 * section + subsection part, can be NULL
575 */
576 int git_config_parse_key(const char *key, char **store_key, size_t *baselen_)
577 {
578 size_t i, baselen;
579 int dot;
580 const char *last_dot = strrchr(key, '.');
581
582 /*
583 * Since "key" actually contains the section name and the real
584 * key name separated by a dot, we have to know where the dot is.
585 */
586
587 if (last_dot == NULL || last_dot == key) {
588 error(_("key does not contain a section: %s"), key);
589 return -CONFIG_NO_SECTION_OR_NAME;
590 }
591
592 if (!last_dot[1]) {
593 error(_("key does not contain variable name: %s"), key);
594 return -CONFIG_NO_SECTION_OR_NAME;
595 }
596
597 baselen = last_dot - key;
598 if (baselen_)
599 *baselen_ = baselen;
600
601 /*
602 * Validate the key and while at it, lower case it for matching.
603 */
604 *store_key = xmallocz(strlen(key));
605
606 dot = 0;
607 for (i = 0; key[i]; i++) {
608 unsigned char c = key[i];
609 if (c == '.')
610 dot = 1;
611 /* Leave the extended basename untouched.. */
612 if (!dot || i > baselen) {
613 if (!iskeychar(c) ||
614 (i == baselen + 1 && !isalpha(c))) {
615 error(_("invalid key: %s"), key);
616 goto out_free_ret_1;
617 }
618 c = tolower(c);
619 } else if (c == '\n') {
620 error(_("invalid key (newline): %s"), key);
621 goto out_free_ret_1;
622 }
623 (*store_key)[i] = c;
624 }
625
626 return 0;
627
628 out_free_ret_1:
629 FREE_AND_NULL(*store_key);
630 return -CONFIG_INVALID_KEY;
631 }
632
633 static int config_parse_pair(const char *key, const char *value,
634 struct key_value_info *kvi,
635 config_fn_t fn, void *data)
636 {
637 char *canonical_name;
638 int ret;
639 struct config_context ctx = {
640 .kvi = kvi,
641 };
642
643 if (!strlen(key))
644 return error(_("empty config key"));
645 if (git_config_parse_key(key, &canonical_name, NULL))
646 return -1;
647
648 ret = (fn(canonical_name, value, &ctx, data) < 0) ? -1 : 0;
649 free(canonical_name);
650 return ret;
651 }
652
653
654 /* for values read from `git_config_from_parameters()` */
655 void kvi_from_param(struct key_value_info *out)
656 {
657 out->filename = NULL;
658 out->linenr = -1;
659 out->origin_type = CONFIG_ORIGIN_CMDLINE;
660 out->scope = CONFIG_SCOPE_COMMAND;
661 out->path = NULL;
662 }
663
664 int git_config_parse_parameter(const char *text,
665 config_fn_t fn, void *data)
666 {
667 const char *value;
668 struct strbuf **pair;
669 int ret;
670 struct key_value_info kvi = KVI_INIT;
671
672 kvi_from_param(&kvi);
673
674 pair = strbuf_split_str(text, '=', 2);
675 if (!pair[0])
676 return error(_("bogus config parameter: %s"), text);
677
678 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
679 strbuf_setlen(pair[0], pair[0]->len - 1);
680 value = pair[1] ? pair[1]->buf : "";
681 } else {
682 value = NULL;
683 }
684
685 strbuf_trim(pair[0]);
686 if (!pair[0]->len) {
687 strbuf_list_free(pair);
688 return error(_("bogus config parameter: %s"), text);
689 }
690
691 ret = config_parse_pair(pair[0]->buf, value, &kvi, fn, data);
692 strbuf_list_free(pair);
693 return ret;
694 }
695
696 static int parse_config_env_list(char *env, struct key_value_info *kvi,
697 config_fn_t fn, void *data)
698 {
699 char *cur = env;
700 while (cur && *cur) {
701 const char *key = sq_dequote_step(cur, &cur);
702 if (!key)
703 return error(_("bogus format in %s"),
704 CONFIG_DATA_ENVIRONMENT);
705
706 if (!cur || isspace(*cur)) {
707 /* old-style 'key=value' */
708 if (git_config_parse_parameter(key, fn, data) < 0)
709 return -1;
710 }
711 else if (*cur == '=') {
712 /* new-style 'key'='value' */
713 const char *value;
714
715 cur++;
716 if (*cur == '\'') {
717 /* quoted value */
718 value = sq_dequote_step(cur, &cur);
719 if (!value || (cur && !isspace(*cur))) {
720 return error(_("bogus format in %s"),
721 CONFIG_DATA_ENVIRONMENT);
722 }
723 } else if (!*cur || isspace(*cur)) {
724 /* implicit bool: 'key'= */
725 value = NULL;
726 } else {
727 return error(_("bogus format in %s"),
728 CONFIG_DATA_ENVIRONMENT);
729 }
730
731 if (config_parse_pair(key, value, kvi, fn, data) < 0)
732 return -1;
733 }
734 else {
735 /* unknown format */
736 return error(_("bogus format in %s"),
737 CONFIG_DATA_ENVIRONMENT);
738 }
739
740 if (cur) {
741 while (isspace(*cur))
742 cur++;
743 }
744 }
745 return 0;
746 }
747
748 int git_config_from_parameters(config_fn_t fn, void *data)
749 {
750 const char *env;
751 struct strbuf envvar = STRBUF_INIT;
752 struct strvec to_free = STRVEC_INIT;
753 int ret = 0;
754 char *envw = NULL;
755 struct config_source source = CONFIG_SOURCE_INIT;
756 struct key_value_info kvi = KVI_INIT;
757
758 source.origin_type = CONFIG_ORIGIN_CMDLINE;
759 config_reader_push_source(&the_reader, &source);
760
761 kvi_from_param(&kvi);
762
763 env = getenv(CONFIG_COUNT_ENVIRONMENT);
764 if (env) {
765 unsigned long count;
766 char *endp;
767 int i;
768
769 count = strtoul(env, &endp, 10);
770 if (*endp) {
771 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
772 goto out;
773 }
774 if (count > INT_MAX) {
775 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
776 goto out;
777 }
778
779 for (i = 0; i < count; i++) {
780 const char *key, *value;
781
782 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
783 key = getenv_safe(&to_free, envvar.buf);
784 if (!key) {
785 ret = error(_("missing config key %s"), envvar.buf);
786 goto out;
787 }
788 strbuf_reset(&envvar);
789
790 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
791 value = getenv_safe(&to_free, envvar.buf);
792 if (!value) {
793 ret = error(_("missing config value %s"), envvar.buf);
794 goto out;
795 }
796 strbuf_reset(&envvar);
797
798 if (config_parse_pair(key, value, &kvi, fn, data) < 0) {
799 ret = -1;
800 goto out;
801 }
802 }
803 }
804
805 env = getenv(CONFIG_DATA_ENVIRONMENT);
806 if (env) {
807 /* sq_dequote will write over it */
808 envw = xstrdup(env);
809 if (parse_config_env_list(envw, &kvi, fn, data) < 0) {
810 ret = -1;
811 goto out;
812 }
813 }
814
815 out:
816 strbuf_release(&envvar);
817 strvec_clear(&to_free);
818 free(envw);
819 config_reader_pop_source(&the_reader);
820 return ret;
821 }
822
823 static int get_next_char(struct config_source *cs)
824 {
825 int c = cs->do_fgetc(cs);
826
827 if (c == '\r') {
828 /* DOS like systems */
829 c = cs->do_fgetc(cs);
830 if (c != '\n') {
831 if (c != EOF)
832 cs->do_ungetc(c, cs);
833 c = '\r';
834 }
835 }
836
837 if (c != EOF && ++cs->total_len > INT_MAX) {
838 /*
839 * This is an absurdly long config file; refuse to parse
840 * further in order to protect downstream code from integer
841 * overflows. Note that we can't return an error specifically,
842 * but we can mark EOF and put trash in the return value,
843 * which will trigger a parse error.
844 */
845 cs->eof = 1;
846 return 0;
847 }
848
849 if (c == '\n')
850 cs->linenr++;
851 if (c == EOF) {
852 cs->eof = 1;
853 cs->linenr++;
854 c = '\n';
855 }
856 return c;
857 }
858
859 static char *parse_value(struct config_source *cs)
860 {
861 int quote = 0, comment = 0, space = 0;
862
863 strbuf_reset(&cs->value);
864 for (;;) {
865 int c = get_next_char(cs);
866 if (c == '\n') {
867 if (quote) {
868 cs->linenr--;
869 return NULL;
870 }
871 return cs->value.buf;
872 }
873 if (comment)
874 continue;
875 if (isspace(c) && !quote) {
876 if (cs->value.len)
877 space++;
878 continue;
879 }
880 if (!quote) {
881 if (c == ';' || c == '#') {
882 comment = 1;
883 continue;
884 }
885 }
886 for (; space; space--)
887 strbuf_addch(&cs->value, ' ');
888 if (c == '\\') {
889 c = get_next_char(cs);
890 switch (c) {
891 case '\n':
892 continue;
893 case 't':
894 c = '\t';
895 break;
896 case 'b':
897 c = '\b';
898 break;
899 case 'n':
900 c = '\n';
901 break;
902 /* Some characters escape as themselves */
903 case '\\': case '"':
904 break;
905 /* Reject unknown escape sequences */
906 default:
907 return NULL;
908 }
909 strbuf_addch(&cs->value, c);
910 continue;
911 }
912 if (c == '"') {
913 quote = 1-quote;
914 continue;
915 }
916 strbuf_addch(&cs->value, c);
917 }
918 }
919
920 static int get_value(struct config_source *cs, struct key_value_info *kvi,
921 config_fn_t fn, void *data, struct strbuf *name)
922 {
923 int c;
924 char *value;
925 int ret;
926 struct config_context ctx = {
927 .kvi = kvi,
928 };
929
930 /* Get the full name */
931 for (;;) {
932 c = get_next_char(cs);
933 if (cs->eof)
934 break;
935 if (!iskeychar(c))
936 break;
937 strbuf_addch(name, tolower(c));
938 }
939
940 while (c == ' ' || c == '\t')
941 c = get_next_char(cs);
942
943 value = NULL;
944 if (c != '\n') {
945 if (c != '=')
946 return -1;
947 value = parse_value(cs);
948 if (!value)
949 return -1;
950 }
951 /*
952 * We already consumed the \n, but we need linenr to point to
953 * the line we just parsed during the call to fn to get
954 * accurate line number in error messages.
955 */
956 cs->linenr--;
957 kvi->linenr = cs->linenr;
958 ret = fn(name->buf, value, &ctx, data);
959 if (ret >= 0)
960 cs->linenr++;
961 return ret;
962 }
963
964 static int get_extended_base_var(struct config_source *cs, struct strbuf *name,
965 int c)
966 {
967 cs->subsection_case_sensitive = 0;
968 do {
969 if (c == '\n')
970 goto error_incomplete_line;
971 c = get_next_char(cs);
972 } while (isspace(c));
973
974 /* We require the format to be '[base "extension"]' */
975 if (c != '"')
976 return -1;
977 strbuf_addch(name, '.');
978
979 for (;;) {
980 int c = get_next_char(cs);
981 if (c == '\n')
982 goto error_incomplete_line;
983 if (c == '"')
984 break;
985 if (c == '\\') {
986 c = get_next_char(cs);
987 if (c == '\n')
988 goto error_incomplete_line;
989 }
990 strbuf_addch(name, c);
991 }
992
993 /* Final ']' */
994 if (get_next_char(cs) != ']')
995 return -1;
996 return 0;
997 error_incomplete_line:
998 cs->linenr--;
999 return -1;
1000 }
1001
1002 static int get_base_var(struct config_source *cs, struct strbuf *name)
1003 {
1004 cs->subsection_case_sensitive = 1;
1005 for (;;) {
1006 int c = get_next_char(cs);
1007 if (cs->eof)
1008 return -1;
1009 if (c == ']')
1010 return 0;
1011 if (isspace(c))
1012 return get_extended_base_var(cs, name, c);
1013 if (!iskeychar(c) && c != '.')
1014 return -1;
1015 strbuf_addch(name, tolower(c));
1016 }
1017 }
1018
1019 struct parse_event_data {
1020 enum config_event_t previous_type;
1021 size_t previous_offset;
1022 const struct config_options *opts;
1023 };
1024
1025 static int do_event(struct config_source *cs, enum config_event_t type,
1026 struct parse_event_data *data)
1027 {
1028 size_t offset;
1029
1030 if (!data->opts || !data->opts->event_fn)
1031 return 0;
1032
1033 if (type == CONFIG_EVENT_WHITESPACE &&
1034 data->previous_type == type)
1035 return 0;
1036
1037 offset = cs->do_ftell(cs);
1038 /*
1039 * At EOF, the parser always "inserts" an extra '\n', therefore
1040 * the end offset of the event is the current file position, otherwise
1041 * we will already have advanced to the next event.
1042 */
1043 if (type != CONFIG_EVENT_EOF)
1044 offset--;
1045
1046 if (data->previous_type != CONFIG_EVENT_EOF &&
1047 data->opts->event_fn(data->previous_type, data->previous_offset,
1048 offset, data->opts->event_fn_data) < 0)
1049 return -1;
1050
1051 data->previous_type = type;
1052 data->previous_offset = offset;
1053
1054 return 0;
1055 }
1056
1057 static void kvi_from_source(struct config_source *cs,
1058 enum config_scope scope,
1059 struct key_value_info *out)
1060 {
1061 out->filename = strintern(cs->name);
1062 out->origin_type = cs->origin_type;
1063 out->linenr = cs->linenr;
1064 out->scope = scope;
1065 out->path = cs->path;
1066 }
1067
1068 static int git_parse_source(struct config_source *cs, config_fn_t fn,
1069 struct key_value_info *kvi, void *data,
1070 const struct config_options *opts)
1071 {
1072 int comment = 0;
1073 size_t baselen = 0;
1074 struct strbuf *var = &cs->var;
1075 int error_return = 0;
1076 char *error_msg = NULL;
1077
1078 /* U+FEFF Byte Order Mark in UTF8 */
1079 const char *bomptr = utf8_bom;
1080
1081 /* For the parser event callback */
1082 struct parse_event_data event_data = {
1083 CONFIG_EVENT_EOF, 0, opts
1084 };
1085
1086 for (;;) {
1087 int c;
1088
1089 c = get_next_char(cs);
1090 if (bomptr && *bomptr) {
1091 /* We are at the file beginning; skip UTF8-encoded BOM
1092 * if present. Sane editors won't put this in on their
1093 * own, but e.g. Windows Notepad will do it happily. */
1094 if (c == (*bomptr & 0377)) {
1095 bomptr++;
1096 continue;
1097 } else {
1098 /* Do not tolerate partial BOM. */
1099 if (bomptr != utf8_bom)
1100 break;
1101 /* No BOM at file beginning. Cool. */
1102 bomptr = NULL;
1103 }
1104 }
1105 if (c == '\n') {
1106 if (cs->eof) {
1107 if (do_event(cs, CONFIG_EVENT_EOF, &event_data) < 0)
1108 return -1;
1109 return 0;
1110 }
1111 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1112 return -1;
1113 comment = 0;
1114 continue;
1115 }
1116 if (comment)
1117 continue;
1118 if (isspace(c)) {
1119 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1120 return -1;
1121 continue;
1122 }
1123 if (c == '#' || c == ';') {
1124 if (do_event(cs, CONFIG_EVENT_COMMENT, &event_data) < 0)
1125 return -1;
1126 comment = 1;
1127 continue;
1128 }
1129 if (c == '[') {
1130 if (do_event(cs, CONFIG_EVENT_SECTION, &event_data) < 0)
1131 return -1;
1132
1133 /* Reset prior to determining a new stem */
1134 strbuf_reset(var);
1135 if (get_base_var(cs, var) < 0 || var->len < 1)
1136 break;
1137 strbuf_addch(var, '.');
1138 baselen = var->len;
1139 continue;
1140 }
1141 if (!isalpha(c))
1142 break;
1143
1144 if (do_event(cs, CONFIG_EVENT_ENTRY, &event_data) < 0)
1145 return -1;
1146
1147 /*
1148 * Truncate the var name back to the section header
1149 * stem prior to grabbing the suffix part of the name
1150 * and the value.
1151 */
1152 strbuf_setlen(var, baselen);
1153 strbuf_addch(var, tolower(c));
1154 if (get_value(cs, kvi, fn, data, var) < 0)
1155 break;
1156 }
1157
1158 if (do_event(cs, CONFIG_EVENT_ERROR, &event_data) < 0)
1159 return -1;
1160
1161 switch (cs->origin_type) {
1162 case CONFIG_ORIGIN_BLOB:
1163 error_msg = xstrfmt(_("bad config line %d in blob %s"),
1164 cs->linenr, cs->name);
1165 break;
1166 case CONFIG_ORIGIN_FILE:
1167 error_msg = xstrfmt(_("bad config line %d in file %s"),
1168 cs->linenr, cs->name);
1169 break;
1170 case CONFIG_ORIGIN_STDIN:
1171 error_msg = xstrfmt(_("bad config line %d in standard input"),
1172 cs->linenr);
1173 break;
1174 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1175 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1176 cs->linenr, cs->name);
1177 break;
1178 case CONFIG_ORIGIN_CMDLINE:
1179 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1180 cs->linenr, cs->name);
1181 break;
1182 default:
1183 error_msg = xstrfmt(_("bad config line %d in %s"),
1184 cs->linenr, cs->name);
1185 }
1186
1187 switch (opts && opts->error_action ?
1188 opts->error_action :
1189 cs->default_error_action) {
1190 case CONFIG_ERROR_DIE:
1191 die("%s", error_msg);
1192 break;
1193 case CONFIG_ERROR_ERROR:
1194 error_return = error("%s", error_msg);
1195 break;
1196 case CONFIG_ERROR_SILENT:
1197 error_return = -1;
1198 break;
1199 case CONFIG_ERROR_UNSET:
1200 BUG("config error action unset");
1201 }
1202
1203 free(error_msg);
1204 return error_return;
1205 }
1206
1207 static uintmax_t get_unit_factor(const char *end)
1208 {
1209 if (!*end)
1210 return 1;
1211 else if (!strcasecmp(end, "k"))
1212 return 1024;
1213 else if (!strcasecmp(end, "m"))
1214 return 1024 * 1024;
1215 else if (!strcasecmp(end, "g"))
1216 return 1024 * 1024 * 1024;
1217 return 0;
1218 }
1219
1220 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
1221 {
1222 if (value && *value) {
1223 char *end;
1224 intmax_t val;
1225 intmax_t factor;
1226
1227 if (max < 0)
1228 BUG("max must be a positive integer");
1229
1230 errno = 0;
1231 val = strtoimax(value, &end, 0);
1232 if (errno == ERANGE)
1233 return 0;
1234 if (end == value) {
1235 errno = EINVAL;
1236 return 0;
1237 }
1238 factor = get_unit_factor(end);
1239 if (!factor) {
1240 errno = EINVAL;
1241 return 0;
1242 }
1243 if ((val < 0 && -max / factor > val) ||
1244 (val > 0 && max / factor < val)) {
1245 errno = ERANGE;
1246 return 0;
1247 }
1248 val *= factor;
1249 *ret = val;
1250 return 1;
1251 }
1252 errno = EINVAL;
1253 return 0;
1254 }
1255
1256 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
1257 {
1258 if (value && *value) {
1259 char *end;
1260 uintmax_t val;
1261 uintmax_t factor;
1262
1263 /* negative values would be accepted by strtoumax */
1264 if (strchr(value, '-')) {
1265 errno = EINVAL;
1266 return 0;
1267 }
1268 errno = 0;
1269 val = strtoumax(value, &end, 0);
1270 if (errno == ERANGE)
1271 return 0;
1272 if (end == value) {
1273 errno = EINVAL;
1274 return 0;
1275 }
1276 factor = get_unit_factor(end);
1277 if (!factor) {
1278 errno = EINVAL;
1279 return 0;
1280 }
1281 if (unsigned_mult_overflows(factor, val) ||
1282 factor * val > max) {
1283 errno = ERANGE;
1284 return 0;
1285 }
1286 val *= factor;
1287 *ret = val;
1288 return 1;
1289 }
1290 errno = EINVAL;
1291 return 0;
1292 }
1293
1294 int git_parse_int(const char *value, int *ret)
1295 {
1296 intmax_t tmp;
1297 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
1298 return 0;
1299 *ret = tmp;
1300 return 1;
1301 }
1302
1303 static int git_parse_int64(const char *value, int64_t *ret)
1304 {
1305 intmax_t tmp;
1306 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
1307 return 0;
1308 *ret = tmp;
1309 return 1;
1310 }
1311
1312 int git_parse_ulong(const char *value, unsigned long *ret)
1313 {
1314 uintmax_t tmp;
1315 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
1316 return 0;
1317 *ret = tmp;
1318 return 1;
1319 }
1320
1321 int git_parse_ssize_t(const char *value, ssize_t *ret)
1322 {
1323 intmax_t tmp;
1324 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
1325 return 0;
1326 *ret = tmp;
1327 return 1;
1328 }
1329
1330 NORETURN
1331 static void die_bad_number(const char *name, const char *value,
1332 const struct key_value_info *kvi)
1333 {
1334 const char *error_type = (errno == ERANGE) ?
1335 N_("out of range") : N_("invalid unit");
1336 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1337
1338 if (!kvi)
1339 BUG("kvi should not be NULL");
1340
1341 if (!value)
1342 value = "";
1343
1344 if (!kvi->filename)
1345 die(_(bad_numeric), value, name, _(error_type));
1346
1347 switch (kvi->origin_type) {
1348 case CONFIG_ORIGIN_BLOB:
1349 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1350 value, name, kvi->filename, _(error_type));
1351 case CONFIG_ORIGIN_FILE:
1352 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1353 value, name, kvi->filename, _(error_type));
1354 case CONFIG_ORIGIN_STDIN:
1355 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1356 value, name, _(error_type));
1357 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1358 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1359 value, name, kvi->filename, _(error_type));
1360 case CONFIG_ORIGIN_CMDLINE:
1361 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1362 value, name, kvi->filename, _(error_type));
1363 default:
1364 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1365 value, name, kvi->filename, _(error_type));
1366 }
1367 }
1368
1369 int git_config_int(const char *name, const char *value,
1370 const struct key_value_info *kvi)
1371 {
1372 int ret;
1373 if (!git_parse_int(value, &ret))
1374 die_bad_number(name, value, kvi);
1375 return ret;
1376 }
1377
1378 int64_t git_config_int64(const char *name, const char *value,
1379 const struct key_value_info *kvi)
1380 {
1381 int64_t ret;
1382 if (!git_parse_int64(value, &ret))
1383 die_bad_number(name, value, kvi);
1384 return ret;
1385 }
1386
1387 unsigned long git_config_ulong(const char *name, const char *value,
1388 const struct key_value_info *kvi)
1389 {
1390 unsigned long ret;
1391 if (!git_parse_ulong(value, &ret))
1392 die_bad_number(name, value, kvi);
1393 return ret;
1394 }
1395
1396 ssize_t git_config_ssize_t(const char *name, const char *value,
1397 const struct key_value_info *kvi)
1398 {
1399 ssize_t ret;
1400 if (!git_parse_ssize_t(value, &ret))
1401 die_bad_number(name, value, kvi);
1402 return ret;
1403 }
1404
1405 static int git_parse_maybe_bool_text(const char *value)
1406 {
1407 if (!value)
1408 return 1;
1409 if (!*value)
1410 return 0;
1411 if (!strcasecmp(value, "true")
1412 || !strcasecmp(value, "yes")
1413 || !strcasecmp(value, "on"))
1414 return 1;
1415 if (!strcasecmp(value, "false")
1416 || !strcasecmp(value, "no")
1417 || !strcasecmp(value, "off"))
1418 return 0;
1419 return -1;
1420 }
1421
1422 static const struct fsync_component_name {
1423 const char *name;
1424 enum fsync_component component_bits;
1425 } fsync_component_names[] = {
1426 { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT },
1427 { "pack", FSYNC_COMPONENT_PACK },
1428 { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
1429 { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
1430 { "index", FSYNC_COMPONENT_INDEX },
1431 { "objects", FSYNC_COMPONENTS_OBJECTS },
1432 { "reference", FSYNC_COMPONENT_REFERENCE },
1433 { "derived-metadata", FSYNC_COMPONENTS_DERIVED_METADATA },
1434 { "committed", FSYNC_COMPONENTS_COMMITTED },
1435 { "added", FSYNC_COMPONENTS_ADDED },
1436 { "all", FSYNC_COMPONENTS_ALL },
1437 };
1438
1439 static enum fsync_component parse_fsync_components(const char *var, const char *string)
1440 {
1441 enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
1442 enum fsync_component positive = 0, negative = 0;
1443
1444 while (string) {
1445 int i;
1446 size_t len;
1447 const char *ep;
1448 int negated = 0;
1449 int found = 0;
1450
1451 string = string + strspn(string, ", \t\n\r");
1452 ep = strchrnul(string, ',');
1453 len = ep - string;
1454 if (!strcmp(string, "none")) {
1455 current = FSYNC_COMPONENT_NONE;
1456 goto next_name;
1457 }
1458
1459 if (*string == '-') {
1460 negated = 1;
1461 string++;
1462 len--;
1463 if (!len)
1464 warning(_("invalid value for variable %s"), var);
1465 }
1466
1467 if (!len)
1468 break;
1469
1470 for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) {
1471 const struct fsync_component_name *n = &fsync_component_names[i];
1472
1473 if (strncmp(n->name, string, len))
1474 continue;
1475
1476 found = 1;
1477 if (negated)
1478 negative |= n->component_bits;
1479 else
1480 positive |= n->component_bits;
1481 }
1482
1483 if (!found) {
1484 char *component = xstrndup(string, len);
1485 warning(_("ignoring unknown core.fsync component '%s'"), component);
1486 free(component);
1487 }
1488
1489 next_name:
1490 string = ep;
1491 }
1492
1493 return (current & ~negative) | positive;
1494 }
1495
1496 int git_parse_maybe_bool(const char *value)
1497 {
1498 int v = git_parse_maybe_bool_text(value);
1499 if (0 <= v)
1500 return v;
1501 if (git_parse_int(value, &v))
1502 return !!v;
1503 return -1;
1504 }
1505
1506 int git_config_bool_or_int(const char *name, const char *value,
1507 const struct key_value_info *kvi, 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, kvi);
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,
1564 const struct config_context *ctx, void *cb)
1565 {
1566 /* This needs a better name */
1567 if (!strcmp(var, "core.filemode")) {
1568 trust_executable_bit = git_config_bool(var, value);
1569 return 0;
1570 }
1571 if (!strcmp(var, "core.trustctime")) {
1572 trust_ctime = git_config_bool(var, value);
1573 return 0;
1574 }
1575 if (!strcmp(var, "core.checkstat")) {
1576 if (!strcasecmp(value, "default"))
1577 check_stat = 1;
1578 else if (!strcasecmp(value, "minimal"))
1579 check_stat = 0;
1580 }
1581
1582 if (!strcmp(var, "core.quotepath")) {
1583 quote_path_fully = git_config_bool(var, value);
1584 return 0;
1585 }
1586
1587 if (!strcmp(var, "core.symlinks")) {
1588 has_symlinks = git_config_bool(var, value);
1589 return 0;
1590 }
1591
1592 if (!strcmp(var, "core.ignorecase")) {
1593 ignore_case = git_config_bool(var, value);
1594 return 0;
1595 }
1596
1597 if (!strcmp(var, "core.attributesfile"))
1598 return git_config_pathname(&git_attributes_file, var, value);
1599
1600 if (!strcmp(var, "core.hookspath"))
1601 return git_config_pathname(&git_hooks_path, var, value);
1602
1603 if (!strcmp(var, "core.bare")) {
1604 is_bare_repository_cfg = git_config_bool(var, value);
1605 return 0;
1606 }
1607
1608 if (!strcmp(var, "core.ignorestat")) {
1609 assume_unchanged = git_config_bool(var, value);
1610 return 0;
1611 }
1612
1613 if (!strcmp(var, "core.prefersymlinkrefs")) {
1614 prefer_symlink_refs = git_config_bool(var, value);
1615 return 0;
1616 }
1617
1618 if (!strcmp(var, "core.logallrefupdates")) {
1619 if (value && !strcasecmp(value, "always"))
1620 log_all_ref_updates = LOG_REFS_ALWAYS;
1621 else if (git_config_bool(var, value))
1622 log_all_ref_updates = LOG_REFS_NORMAL;
1623 else
1624 log_all_ref_updates = LOG_REFS_NONE;
1625 return 0;
1626 }
1627
1628 if (!strcmp(var, "core.warnambiguousrefs")) {
1629 warn_ambiguous_refs = git_config_bool(var, value);
1630 return 0;
1631 }
1632
1633 if (!strcmp(var, "core.abbrev")) {
1634 if (!value)
1635 return config_error_nonbool(var);
1636 if (!strcasecmp(value, "auto"))
1637 default_abbrev = -1;
1638 else if (!git_parse_maybe_bool_text(value))
1639 default_abbrev = the_hash_algo->hexsz;
1640 else {
1641 int abbrev = git_config_int(var, value, ctx->kvi);
1642 if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
1643 return error(_("abbrev length out of range: %d"), abbrev);
1644 default_abbrev = abbrev;
1645 }
1646 return 0;
1647 }
1648
1649 if (!strcmp(var, "core.disambiguate"))
1650 return set_disambiguate_hint_config(var, value);
1651
1652 if (!strcmp(var, "core.loosecompression")) {
1653 int level = git_config_int(var, value, ctx->kvi);
1654 if (level == -1)
1655 level = Z_DEFAULT_COMPRESSION;
1656 else if (level < 0 || level > Z_BEST_COMPRESSION)
1657 die(_("bad zlib compression level %d"), level);
1658 zlib_compression_level = level;
1659 zlib_compression_seen = 1;
1660 return 0;
1661 }
1662
1663 if (!strcmp(var, "core.compression")) {
1664 int level = git_config_int(var, value, ctx->kvi);
1665 if (level == -1)
1666 level = Z_DEFAULT_COMPRESSION;
1667 else if (level < 0 || level > Z_BEST_COMPRESSION)
1668 die(_("bad zlib compression level %d"), level);
1669 if (!zlib_compression_seen)
1670 zlib_compression_level = level;
1671 if (!pack_compression_seen)
1672 pack_compression_level = level;
1673 return 0;
1674 }
1675
1676 if (!strcmp(var, "core.packedgitwindowsize")) {
1677 int pgsz_x2 = getpagesize() * 2;
1678 packed_git_window_size = git_config_ulong(var, value, ctx->kvi);
1679
1680 /* This value must be multiple of (pagesize * 2) */
1681 packed_git_window_size /= pgsz_x2;
1682 if (packed_git_window_size < 1)
1683 packed_git_window_size = 1;
1684 packed_git_window_size *= pgsz_x2;
1685 return 0;
1686 }
1687
1688 if (!strcmp(var, "core.bigfilethreshold")) {
1689 big_file_threshold = git_config_ulong(var, value, ctx->kvi);
1690 return 0;
1691 }
1692
1693 if (!strcmp(var, "core.packedgitlimit")) {
1694 packed_git_limit = git_config_ulong(var, value, ctx->kvi);
1695 return 0;
1696 }
1697
1698 if (!strcmp(var, "core.deltabasecachelimit")) {
1699 delta_base_cache_limit = git_config_ulong(var, value, ctx->kvi);
1700 return 0;
1701 }
1702
1703 if (!strcmp(var, "core.autocrlf")) {
1704 if (value && !strcasecmp(value, "input")) {
1705 auto_crlf = AUTO_CRLF_INPUT;
1706 return 0;
1707 }
1708 auto_crlf = git_config_bool(var, value);
1709 return 0;
1710 }
1711
1712 if (!strcmp(var, "core.safecrlf")) {
1713 int eol_rndtrp_die;
1714 if (value && !strcasecmp(value, "warn")) {
1715 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1716 return 0;
1717 }
1718 eol_rndtrp_die = git_config_bool(var, value);
1719 global_conv_flags_eol = eol_rndtrp_die ?
1720 CONV_EOL_RNDTRP_DIE : 0;
1721 return 0;
1722 }
1723
1724 if (!strcmp(var, "core.eol")) {
1725 if (value && !strcasecmp(value, "lf"))
1726 core_eol = EOL_LF;
1727 else if (value && !strcasecmp(value, "crlf"))
1728 core_eol = EOL_CRLF;
1729 else if (value && !strcasecmp(value, "native"))
1730 core_eol = EOL_NATIVE;
1731 else
1732 core_eol = EOL_UNSET;
1733 return 0;
1734 }
1735
1736 if (!strcmp(var, "core.checkroundtripencoding")) {
1737 check_roundtrip_encoding = xstrdup(value);
1738 return 0;
1739 }
1740
1741 if (!strcmp(var, "core.notesref")) {
1742 notes_ref_name = xstrdup(value);
1743 return 0;
1744 }
1745
1746 if (!strcmp(var, "core.editor"))
1747 return git_config_string(&editor_program, var, value);
1748
1749 if (!strcmp(var, "core.commentchar")) {
1750 if (!value)
1751 return config_error_nonbool(var);
1752 else if (!strcasecmp(value, "auto"))
1753 auto_comment_line_char = 1;
1754 else if (value[0] && !value[1]) {
1755 comment_line_char = value[0];
1756 auto_comment_line_char = 0;
1757 } else
1758 return error(_("core.commentChar should only be one ASCII character"));
1759 return 0;
1760 }
1761
1762 if (!strcmp(var, "core.askpass"))
1763 return git_config_string(&askpass_program, var, value);
1764
1765 if (!strcmp(var, "core.excludesfile"))
1766 return git_config_pathname(&excludes_file, var, value);
1767
1768 if (!strcmp(var, "core.whitespace")) {
1769 if (!value)
1770 return config_error_nonbool(var);
1771 whitespace_rule_cfg = parse_whitespace_rule(value);
1772 return 0;
1773 }
1774
1775 if (!strcmp(var, "core.fsync")) {
1776 if (!value)
1777 return config_error_nonbool(var);
1778 fsync_components = parse_fsync_components(var, value);
1779 return 0;
1780 }
1781
1782 if (!strcmp(var, "core.fsyncmethod")) {
1783 if (!value)
1784 return config_error_nonbool(var);
1785 if (!strcmp(value, "fsync"))
1786 fsync_method = FSYNC_METHOD_FSYNC;
1787 else if (!strcmp(value, "writeout-only"))
1788 fsync_method = FSYNC_METHOD_WRITEOUT_ONLY;
1789 else if (!strcmp(value, "batch"))
1790 fsync_method = FSYNC_METHOD_BATCH;
1791 else
1792 warning(_("ignoring unknown core.fsyncMethod value '%s'"), value);
1793
1794 }
1795
1796 if (!strcmp(var, "core.fsyncobjectfiles")) {
1797 if (fsync_object_files < 0)
1798 warning(_("core.fsyncObjectFiles is deprecated; use core.fsync instead"));
1799 fsync_object_files = git_config_bool(var, value);
1800 return 0;
1801 }
1802
1803 if (!strcmp(var, "core.preloadindex")) {
1804 core_preload_index = git_config_bool(var, value);
1805 return 0;
1806 }
1807
1808 if (!strcmp(var, "core.createobject")) {
1809 if (!strcmp(value, "rename"))
1810 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1811 else if (!strcmp(value, "link"))
1812 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1813 else
1814 die(_("invalid mode for object creation: %s"), value);
1815 return 0;
1816 }
1817
1818 if (!strcmp(var, "core.sparsecheckout")) {
1819 core_apply_sparse_checkout = git_config_bool(var, value);
1820 return 0;
1821 }
1822
1823 if (!strcmp(var, "core.sparsecheckoutcone")) {
1824 core_sparse_checkout_cone = git_config_bool(var, value);
1825 return 0;
1826 }
1827
1828 if (!strcmp(var, "core.precomposeunicode")) {
1829 precomposed_unicode = git_config_bool(var, value);
1830 return 0;
1831 }
1832
1833 if (!strcmp(var, "core.protecthfs")) {
1834 protect_hfs = git_config_bool(var, value);
1835 return 0;
1836 }
1837
1838 if (!strcmp(var, "core.protectntfs")) {
1839 protect_ntfs = git_config_bool(var, value);
1840 return 0;
1841 }
1842
1843 /* Add other config variables here and to Documentation/config.txt. */
1844 return platform_core_config(var, value, ctx, cb);
1845 }
1846
1847 static int git_default_sparse_config(const char *var, const char *value)
1848 {
1849 if (!strcmp(var, "sparse.expectfilesoutsideofpatterns")) {
1850 sparse_expect_files_outside_of_patterns = git_config_bool(var, value);
1851 return 0;
1852 }
1853
1854 /* Add other config variables here and to Documentation/config/sparse.txt. */
1855 return 0;
1856 }
1857
1858 static int git_default_i18n_config(const char *var, const char *value)
1859 {
1860 if (!strcmp(var, "i18n.commitencoding"))
1861 return git_config_string(&git_commit_encoding, var, value);
1862
1863 if (!strcmp(var, "i18n.logoutputencoding"))
1864 return git_config_string(&git_log_output_encoding, var, value);
1865
1866 /* Add other config variables here and to Documentation/config.txt. */
1867 return 0;
1868 }
1869
1870 static int git_default_branch_config(const char *var, const char *value)
1871 {
1872 if (!strcmp(var, "branch.autosetupmerge")) {
1873 if (value && !strcmp(value, "always")) {
1874 git_branch_track = BRANCH_TRACK_ALWAYS;
1875 return 0;
1876 } else if (value && !strcmp(value, "inherit")) {
1877 git_branch_track = BRANCH_TRACK_INHERIT;
1878 return 0;
1879 } else if (value && !strcmp(value, "simple")) {
1880 git_branch_track = BRANCH_TRACK_SIMPLE;
1881 return 0;
1882 }
1883 git_branch_track = git_config_bool(var, value);
1884 return 0;
1885 }
1886 if (!strcmp(var, "branch.autosetuprebase")) {
1887 if (!value)
1888 return config_error_nonbool(var);
1889 else if (!strcmp(value, "never"))
1890 autorebase = AUTOREBASE_NEVER;
1891 else if (!strcmp(value, "local"))
1892 autorebase = AUTOREBASE_LOCAL;
1893 else if (!strcmp(value, "remote"))
1894 autorebase = AUTOREBASE_REMOTE;
1895 else if (!strcmp(value, "always"))
1896 autorebase = AUTOREBASE_ALWAYS;
1897 else
1898 return error(_("malformed value for %s"), var);
1899 return 0;
1900 }
1901
1902 /* Add other config variables here and to Documentation/config.txt. */
1903 return 0;
1904 }
1905
1906 static int git_default_push_config(const char *var, const char *value)
1907 {
1908 if (!strcmp(var, "push.default")) {
1909 if (!value)
1910 return config_error_nonbool(var);
1911 else if (!strcmp(value, "nothing"))
1912 push_default = PUSH_DEFAULT_NOTHING;
1913 else if (!strcmp(value, "matching"))
1914 push_default = PUSH_DEFAULT_MATCHING;
1915 else if (!strcmp(value, "simple"))
1916 push_default = PUSH_DEFAULT_SIMPLE;
1917 else if (!strcmp(value, "upstream"))
1918 push_default = PUSH_DEFAULT_UPSTREAM;
1919 else if (!strcmp(value, "tracking")) /* deprecated */
1920 push_default = PUSH_DEFAULT_UPSTREAM;
1921 else if (!strcmp(value, "current"))
1922 push_default = PUSH_DEFAULT_CURRENT;
1923 else {
1924 error(_("malformed value for %s: %s"), var, value);
1925 return error(_("must be one of nothing, matching, simple, "
1926 "upstream or current"));
1927 }
1928 return 0;
1929 }
1930
1931 /* Add other config variables here and to Documentation/config.txt. */
1932 return 0;
1933 }
1934
1935 static int git_default_mailmap_config(const char *var, const char *value)
1936 {
1937 if (!strcmp(var, "mailmap.file"))
1938 return git_config_pathname(&git_mailmap_file, var, value);
1939 if (!strcmp(var, "mailmap.blob"))
1940 return git_config_string(&git_mailmap_blob, var, value);
1941
1942 /* Add other config variables here and to Documentation/config.txt. */
1943 return 0;
1944 }
1945
1946 int git_default_config(const char *var, const char *value,
1947 const struct config_context *ctx, void *cb)
1948 {
1949 if (starts_with(var, "core."))
1950 return git_default_core_config(var, value, ctx, cb);
1951
1952 if (starts_with(var, "user.") ||
1953 starts_with(var, "author.") ||
1954 starts_with(var, "committer."))
1955 return git_ident_config(var, value, ctx, cb);
1956
1957 if (starts_with(var, "i18n."))
1958 return git_default_i18n_config(var, value);
1959
1960 if (starts_with(var, "branch."))
1961 return git_default_branch_config(var, value);
1962
1963 if (starts_with(var, "push."))
1964 return git_default_push_config(var, value);
1965
1966 if (starts_with(var, "mailmap."))
1967 return git_default_mailmap_config(var, value);
1968
1969 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1970 return git_default_advice_config(var, value);
1971
1972 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1973 pager_use_color = git_config_bool(var,value);
1974 return 0;
1975 }
1976
1977 if (!strcmp(var, "pack.packsizelimit")) {
1978 pack_size_limit_cfg = git_config_ulong(var, value, ctx->kvi);
1979 return 0;
1980 }
1981
1982 if (!strcmp(var, "pack.compression")) {
1983 int level = git_config_int(var, value, ctx->kvi);
1984 if (level == -1)
1985 level = Z_DEFAULT_COMPRESSION;
1986 else if (level < 0 || level > Z_BEST_COMPRESSION)
1987 die(_("bad pack compression level %d"), level);
1988 pack_compression_level = level;
1989 pack_compression_seen = 1;
1990 return 0;
1991 }
1992
1993 if (starts_with(var, "sparse."))
1994 return git_default_sparse_config(var, value);
1995
1996 /* Add other config variables here and to Documentation/config.txt. */
1997 return 0;
1998 }
1999
2000 /*
2001 * All source specific fields in the union, die_on_error, name and the callbacks
2002 * fgetc, ungetc, ftell of top need to be initialized before calling
2003 * this function.
2004 */
2005 static int do_config_from(struct config_reader *reader,
2006 struct config_source *top, config_fn_t fn,
2007 void *data, enum config_scope scope,
2008 const struct config_options *opts)
2009 {
2010 struct key_value_info kvi = KVI_INIT;
2011 int ret;
2012
2013 /* push config-file parsing state stack */
2014 top->linenr = 1;
2015 top->eof = 0;
2016 top->total_len = 0;
2017 strbuf_init(&top->value, 1024);
2018 strbuf_init(&top->var, 1024);
2019 config_reader_push_source(reader, top);
2020 kvi_from_source(top, scope, &kvi);
2021
2022 ret = git_parse_source(top, fn, &kvi, data, opts);
2023
2024 /* pop config-file parsing state stack */
2025 strbuf_release(&top->value);
2026 strbuf_release(&top->var);
2027 config_reader_pop_source(reader);
2028
2029 return ret;
2030 }
2031
2032 static int do_config_from_file(struct config_reader *reader,
2033 config_fn_t fn,
2034 const enum config_origin_type origin_type,
2035 const char *name, const char *path, FILE *f,
2036 void *data, enum config_scope scope,
2037 const struct config_options *opts)
2038 {
2039 struct config_source top = CONFIG_SOURCE_INIT;
2040 int ret;
2041
2042 top.u.file = f;
2043 top.origin_type = origin_type;
2044 top.name = name;
2045 top.path = path;
2046 top.default_error_action = CONFIG_ERROR_DIE;
2047 top.do_fgetc = config_file_fgetc;
2048 top.do_ungetc = config_file_ungetc;
2049 top.do_ftell = config_file_ftell;
2050
2051 flockfile(f);
2052 ret = do_config_from(reader, &top, fn, data, scope, opts);
2053 funlockfile(f);
2054 return ret;
2055 }
2056
2057 static int git_config_from_stdin(config_fn_t fn, void *data,
2058 enum config_scope scope)
2059 {
2060 return do_config_from_file(&the_reader, fn, CONFIG_ORIGIN_STDIN, "",
2061 NULL, stdin, data, scope, NULL);
2062 }
2063
2064 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
2065 void *data, enum config_scope scope,
2066 const struct config_options *opts)
2067 {
2068 int ret = -1;
2069 FILE *f;
2070
2071 if (!filename)
2072 BUG("filename cannot be NULL");
2073 f = fopen_or_warn(filename, "r");
2074 if (f) {
2075 ret = do_config_from_file(&the_reader, fn, CONFIG_ORIGIN_FILE,
2076 filename, filename, f, data, scope,
2077 opts);
2078 fclose(f);
2079 }
2080 return ret;
2081 }
2082
2083 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
2084 {
2085 return git_config_from_file_with_options(fn, filename, data,
2086 CONFIG_SCOPE_UNKNOWN, NULL);
2087 }
2088
2089 int git_config_from_mem(config_fn_t fn,
2090 const enum config_origin_type origin_type,
2091 const char *name, const char *buf, size_t len,
2092 void *data, enum config_scope scope,
2093 const struct config_options *opts)
2094 {
2095 struct config_source top = CONFIG_SOURCE_INIT;
2096
2097 top.u.buf.buf = buf;
2098 top.u.buf.len = len;
2099 top.u.buf.pos = 0;
2100 top.origin_type = origin_type;
2101 top.name = name;
2102 top.path = NULL;
2103 top.default_error_action = CONFIG_ERROR_ERROR;
2104 top.do_fgetc = config_buf_fgetc;
2105 top.do_ungetc = config_buf_ungetc;
2106 top.do_ftell = config_buf_ftell;
2107
2108 return do_config_from(&the_reader, &top, fn, data, scope, opts);
2109 }
2110
2111 int git_config_from_blob_oid(config_fn_t fn,
2112 const char *name,
2113 struct repository *repo,
2114 const struct object_id *oid,
2115 void *data,
2116 enum config_scope scope)
2117 {
2118 enum object_type type;
2119 char *buf;
2120 unsigned long size;
2121 int ret;
2122
2123 buf = repo_read_object_file(repo, oid, &type, &size);
2124 if (!buf)
2125 return error(_("unable to load config blob object '%s'"), name);
2126 if (type != OBJ_BLOB) {
2127 free(buf);
2128 return error(_("reference '%s' does not point to a blob"), name);
2129 }
2130
2131 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
2132 data, scope, NULL);
2133 free(buf);
2134
2135 return ret;
2136 }
2137
2138 static int git_config_from_blob_ref(config_fn_t fn,
2139 struct repository *repo,
2140 const char *name,
2141 void *data,
2142 enum config_scope scope)
2143 {
2144 struct object_id oid;
2145
2146 if (repo_get_oid(repo, name, &oid) < 0)
2147 return error(_("unable to resolve config blob '%s'"), name);
2148 return git_config_from_blob_oid(fn, name, repo, &oid, data, scope);
2149 }
2150
2151 char *git_system_config(void)
2152 {
2153 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
2154 if (!system_config)
2155 system_config = system_path(ETC_GITCONFIG);
2156 normalize_path_copy(system_config, system_config);
2157 return system_config;
2158 }
2159
2160 void git_global_config(char **user_out, char **xdg_out)
2161 {
2162 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
2163 char *xdg_config = NULL;
2164
2165 if (!user_config) {
2166 user_config = interpolate_path("~/.gitconfig", 0);
2167 xdg_config = xdg_config_home("config");
2168 }
2169
2170 *user_out = user_config;
2171 *xdg_out = xdg_config;
2172 }
2173
2174 /*
2175 * Parse environment variable 'k' as a boolean (in various
2176 * possible spellings); if missing, use the default value 'def'.
2177 */
2178 int git_env_bool(const char *k, int def)
2179 {
2180 const char *v = getenv(k);
2181 return v ? git_config_bool(k, v) : def;
2182 }
2183
2184 /*
2185 * Parse environment variable 'k' as ulong with possibly a unit
2186 * suffix; if missing, use the default value 'val'.
2187 */
2188 unsigned long git_env_ulong(const char *k, unsigned long val)
2189 {
2190 const char *v = getenv(k);
2191 if (v && !git_parse_ulong(v, &val))
2192 die(_("failed to parse %s"), k);
2193 return val;
2194 }
2195
2196 int git_config_system(void)
2197 {
2198 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
2199 }
2200
2201 static int do_git_config_sequence(struct config_reader *reader,
2202 const struct config_options *opts,
2203 const struct repository *repo,
2204 config_fn_t fn, void *data)
2205 {
2206 int ret = 0;
2207 char *system_config = git_system_config();
2208 char *xdg_config = NULL;
2209 char *user_config = NULL;
2210 char *repo_config;
2211 char *worktree_config;
2212
2213 /*
2214 * Ensure that either:
2215 * - the git_dir and commondir are both set, or
2216 * - the git_dir and commondir are both NULL
2217 */
2218 if (!opts->git_dir != !opts->commondir)
2219 BUG("only one of commondir and git_dir is non-NULL");
2220
2221 if (opts->commondir) {
2222 repo_config = mkpathdup("%s/config", opts->commondir);
2223 worktree_config = mkpathdup("%s/config.worktree", opts->git_dir);
2224 } else {
2225 repo_config = NULL;
2226 worktree_config = NULL;
2227 }
2228
2229 if (git_config_system() && system_config &&
2230 !access_or_die(system_config, R_OK,
2231 opts->system_gently ? ACCESS_EACCES_OK : 0))
2232 ret += git_config_from_file_with_options(fn, system_config,
2233 data, CONFIG_SCOPE_SYSTEM,
2234 NULL);
2235
2236 git_global_config(&user_config, &xdg_config);
2237
2238 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
2239 ret += git_config_from_file_with_options(fn, xdg_config, data,
2240 CONFIG_SCOPE_GLOBAL, NULL);
2241
2242 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
2243 ret += git_config_from_file_with_options(fn, user_config, data,
2244 CONFIG_SCOPE_GLOBAL, NULL);
2245
2246 if (!opts->ignore_repo && repo_config &&
2247 !access_or_die(repo_config, R_OK, 0))
2248 ret += git_config_from_file_with_options(fn, repo_config, data,
2249 CONFIG_SCOPE_LOCAL, NULL);
2250
2251 if (!opts->ignore_worktree && worktree_config &&
2252 repo && repo->repository_format_worktree_config &&
2253 !access_or_die(worktree_config, R_OK, 0)) {
2254 ret += git_config_from_file_with_options(fn, worktree_config, data,
2255 CONFIG_SCOPE_WORKTREE,
2256 NULL);
2257 }
2258
2259 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
2260 die(_("unable to parse command-line config"));
2261
2262 free(system_config);
2263 free(xdg_config);
2264 free(user_config);
2265 free(repo_config);
2266 free(worktree_config);
2267 return ret;
2268 }
2269
2270 int config_with_options(config_fn_t fn, void *data,
2271 struct git_config_source *config_source,
2272 struct repository *repo,
2273 const struct config_options *opts)
2274 {
2275 struct config_include_data inc = CONFIG_INCLUDE_INIT;
2276 int ret;
2277
2278 if (opts->respect_includes) {
2279 inc.fn = fn;
2280 inc.data = data;
2281 inc.opts = opts;
2282 inc.repo = repo;
2283 inc.config_source = config_source;
2284 fn = git_config_include;
2285 data = &inc;
2286 }
2287
2288 /*
2289 * If we have a specific filename, use it. Otherwise, follow the
2290 * regular lookup sequence.
2291 */
2292 if (config_source && config_source->use_stdin) {
2293 ret = git_config_from_stdin(fn, data, config_source->scope);
2294 } else if (config_source && config_source->file) {
2295 ret = git_config_from_file_with_options(fn, config_source->file,
2296 data, config_source->scope,
2297 NULL);
2298 } else if (config_source && config_source->blob) {
2299 ret = git_config_from_blob_ref(fn, repo, config_source->blob,
2300 data, config_source->scope);
2301 } else {
2302 ret = do_git_config_sequence(&the_reader, opts, repo, fn, data);
2303 }
2304
2305 if (inc.remote_urls) {
2306 string_list_clear(inc.remote_urls, 0);
2307 FREE_AND_NULL(inc.remote_urls);
2308 }
2309 return ret;
2310 }
2311
2312 static void configset_iter(struct config_set *set, config_fn_t fn, void *data)
2313 {
2314 int i, value_index;
2315 struct string_list *values;
2316 struct config_set_element *entry;
2317 struct configset_list *list = &set->list;
2318 struct config_context ctx = CONFIG_CONTEXT_INIT;
2319
2320 for (i = 0; i < list->nr; i++) {
2321 entry = list->items[i].e;
2322 value_index = list->items[i].value_index;
2323 values = &entry->value_list;
2324
2325 ctx.kvi = values->items[value_index].util;
2326 if (fn(entry->key, values->items[value_index].string, &ctx, data) < 0)
2327 git_die_config_linenr(entry->key,
2328 ctx.kvi->filename,
2329 ctx.kvi->linenr);
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, 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, 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(const struct key_value_info *kvi_p,
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 *kv_info = *kvi_p;
2437 si->util = kv_info;
2438
2439 return 0;
2440 }
2441
2442 static int config_set_element_cmp(const void *cmp_data UNUSED,
2443 const struct hashmap_entry *eptr,
2444 const struct hashmap_entry *entry_or_key,
2445 const void *keydata UNUSED)
2446 {
2447 const struct config_set_element *e1, *e2;
2448
2449 e1 = container_of(eptr, const struct config_set_element, ent);
2450 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2451
2452 return strcmp(e1->key, e2->key);
2453 }
2454
2455 void git_configset_init(struct config_set *set)
2456 {
2457 hashmap_init(&set->config_hash, config_set_element_cmp, NULL, 0);
2458 set->hash_initialized = 1;
2459 set->list.nr = 0;
2460 set->list.alloc = 0;
2461 set->list.items = NULL;
2462 }
2463
2464 void git_configset_clear(struct config_set *set)
2465 {
2466 struct config_set_element *entry;
2467 struct hashmap_iter iter;
2468 if (!set->hash_initialized)
2469 return;
2470
2471 hashmap_for_each_entry(&set->config_hash, &iter, entry,
2472 ent /* member name */) {
2473 free(entry->key);
2474 string_list_clear(&entry->value_list, 1);
2475 }
2476 hashmap_clear_and_free(&set->config_hash, struct config_set_element, ent);
2477 set->hash_initialized = 0;
2478 free(set->list.items);
2479 set->list.nr = 0;
2480 set->list.alloc = 0;
2481 set->list.items = NULL;
2482 }
2483
2484 static int config_set_callback(const char *key, const char *value,
2485 const struct config_context *ctx,
2486 void *cb)
2487 {
2488 struct config_set *set = cb;
2489 configset_add_value(ctx->kvi, set, key, value);
2490 return 0;
2491 }
2492
2493 int git_configset_add_file(struct config_set *set, const char *filename)
2494 {
2495 return git_config_from_file(config_set_callback, filename, set);
2496 }
2497
2498 int git_configset_get_value(struct config_set *set, const char *key,
2499 const char **value, struct key_value_info *kvi)
2500 {
2501 const struct string_list *values = NULL;
2502 int ret;
2503 struct string_list_item item;
2504 /*
2505 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2506 * queried key in the files of the configset, the value returned will be the last
2507 * value in the value list for that key.
2508 */
2509 if ((ret = git_configset_get_value_multi(set, key, &values)))
2510 return ret;
2511
2512 assert(values->nr > 0);
2513 item = values->items[values->nr - 1];
2514 *value = item.string;
2515 if (kvi)
2516 *kvi = *((struct key_value_info *)item.util);
2517 return 0;
2518 }
2519
2520 int git_configset_get_value_multi(struct config_set *set, const char *key,
2521 const struct string_list **dest)
2522 {
2523 struct config_set_element *e;
2524 int ret;
2525
2526 if ((ret = configset_find_element(set, key, &e)))
2527 return ret;
2528 else if (!e)
2529 return 1;
2530 *dest = &e->value_list;
2531
2532 return 0;
2533 }
2534
2535 static int check_multi_string(struct string_list_item *item, void *util)
2536 {
2537 return item->string ? 0 : config_error_nonbool(util);
2538 }
2539
2540 int git_configset_get_string_multi(struct config_set *cs, const char *key,
2541 const struct string_list **dest)
2542 {
2543 int ret;
2544
2545 if ((ret = git_configset_get_value_multi(cs, key, dest)))
2546 return ret;
2547 if ((ret = for_each_string_list((struct string_list *)*dest,
2548 check_multi_string, (void *)key)))
2549 return ret;
2550
2551 return 0;
2552 }
2553
2554 int git_configset_get(struct config_set *set, const char *key)
2555 {
2556 struct config_set_element *e;
2557 int ret;
2558
2559 if ((ret = configset_find_element(set, key, &e)))
2560 return ret;
2561 else if (!e)
2562 return 1;
2563 return 0;
2564 }
2565
2566 int git_configset_get_string(struct config_set *set, const char *key, char **dest)
2567 {
2568 const char *value;
2569 if (!git_configset_get_value(set, key, &value, NULL))
2570 return git_config_string((const char **)dest, key, value);
2571 else
2572 return 1;
2573 }
2574
2575 static int git_configset_get_string_tmp(struct config_set *set, const char *key,
2576 const char **dest)
2577 {
2578 const char *value;
2579 if (!git_configset_get_value(set, key, &value, NULL)) {
2580 if (!value)
2581 return config_error_nonbool(key);
2582 *dest = value;
2583 return 0;
2584 } else {
2585 return 1;
2586 }
2587 }
2588
2589 int git_configset_get_int(struct config_set *set, const char *key, int *dest)
2590 {
2591 const char *value;
2592 struct key_value_info kvi;
2593
2594 if (!git_configset_get_value(set, key, &value, &kvi)) {
2595 *dest = git_config_int(key, value, &kvi);
2596 return 0;
2597 } else
2598 return 1;
2599 }
2600
2601 int git_configset_get_ulong(struct config_set *set, const char *key, unsigned long *dest)
2602 {
2603 const char *value;
2604 struct key_value_info kvi;
2605
2606 if (!git_configset_get_value(set, key, &value, &kvi)) {
2607 *dest = git_config_ulong(key, value, &kvi);
2608 return 0;
2609 } else
2610 return 1;
2611 }
2612
2613 int git_configset_get_bool(struct config_set *set, const char *key, int *dest)
2614 {
2615 const char *value;
2616 if (!git_configset_get_value(set, key, &value, NULL)) {
2617 *dest = git_config_bool(key, value);
2618 return 0;
2619 } else
2620 return 1;
2621 }
2622
2623 int git_configset_get_bool_or_int(struct config_set *set, const char *key,
2624 int *is_bool, int *dest)
2625 {
2626 const char *value;
2627 struct key_value_info kvi;
2628
2629 if (!git_configset_get_value(set, key, &value, &kvi)) {
2630 *dest = git_config_bool_or_int(key, value, &kvi, is_bool);
2631 return 0;
2632 } else
2633 return 1;
2634 }
2635
2636 int git_configset_get_maybe_bool(struct config_set *set, const char *key, int *dest)
2637 {
2638 const char *value;
2639 if (!git_configset_get_value(set, key, &value, NULL)) {
2640 *dest = git_parse_maybe_bool(value);
2641 if (*dest == -1)
2642 return -1;
2643 return 0;
2644 } else
2645 return 1;
2646 }
2647
2648 int git_configset_get_pathname(struct config_set *set, const char *key, const char **dest)
2649 {
2650 const char *value;
2651 if (!git_configset_get_value(set, key, &value, NULL))
2652 return git_config_pathname(dest, key, value);
2653 else
2654 return 1;
2655 }
2656
2657 /* Functions use to read configuration from a repository */
2658 static void repo_read_config(struct repository *repo)
2659 {
2660 struct config_options opts = { 0 };
2661
2662 opts.respect_includes = 1;
2663 opts.commondir = repo->commondir;
2664 opts.git_dir = repo->gitdir;
2665
2666 if (!repo->config)
2667 CALLOC_ARRAY(repo->config, 1);
2668 else
2669 git_configset_clear(repo->config);
2670
2671 git_configset_init(repo->config);
2672 if (config_with_options(config_set_callback, repo->config, NULL,
2673 repo, &opts) < 0)
2674 /*
2675 * config_with_options() normally returns only
2676 * zero, as most errors are fatal, and
2677 * non-fatal potential errors are guarded by "if"
2678 * statements that are entered only when no error is
2679 * possible.
2680 *
2681 * If we ever encounter a non-fatal error, it means
2682 * something went really wrong and we should stop
2683 * immediately.
2684 */
2685 die(_("unknown error occurred while reading the configuration files"));
2686 }
2687
2688 static void git_config_check_init(struct repository *repo)
2689 {
2690 if (repo->config && repo->config->hash_initialized)
2691 return;
2692 repo_read_config(repo);
2693 }
2694
2695 static void repo_config_clear(struct repository *repo)
2696 {
2697 if (!repo->config || !repo->config->hash_initialized)
2698 return;
2699 git_configset_clear(repo->config);
2700 }
2701
2702 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2703 {
2704 git_config_check_init(repo);
2705 configset_iter(repo->config, fn, data);
2706 }
2707
2708 int repo_config_get(struct repository *repo, const char *key)
2709 {
2710 git_config_check_init(repo);
2711 return git_configset_get(repo->config, key);
2712 }
2713
2714 int repo_config_get_value(struct repository *repo,
2715 const char *key, const char **value)
2716 {
2717 git_config_check_init(repo);
2718 return git_configset_get_value(repo->config, key, value, NULL);
2719 }
2720
2721 int repo_config_get_value_multi(struct repository *repo, const char *key,
2722 const struct string_list **dest)
2723 {
2724 git_config_check_init(repo);
2725 return git_configset_get_value_multi(repo->config, key, dest);
2726 }
2727
2728 int repo_config_get_string_multi(struct repository *repo, const char *key,
2729 const struct string_list **dest)
2730 {
2731 git_config_check_init(repo);
2732 return git_configset_get_string_multi(repo->config, key, dest);
2733 }
2734
2735 int repo_config_get_string(struct repository *repo,
2736 const char *key, char **dest)
2737 {
2738 int ret;
2739 git_config_check_init(repo);
2740 ret = git_configset_get_string(repo->config, key, dest);
2741 if (ret < 0)
2742 git_die_config(key, NULL);
2743 return ret;
2744 }
2745
2746 int repo_config_get_string_tmp(struct repository *repo,
2747 const char *key, const char **dest)
2748 {
2749 int ret;
2750 git_config_check_init(repo);
2751 ret = git_configset_get_string_tmp(repo->config, key, dest);
2752 if (ret < 0)
2753 git_die_config(key, NULL);
2754 return ret;
2755 }
2756
2757 int repo_config_get_int(struct repository *repo,
2758 const char *key, int *dest)
2759 {
2760 git_config_check_init(repo);
2761 return git_configset_get_int(repo->config, key, dest);
2762 }
2763
2764 int repo_config_get_ulong(struct repository *repo,
2765 const char *key, unsigned long *dest)
2766 {
2767 git_config_check_init(repo);
2768 return git_configset_get_ulong(repo->config, key, dest);
2769 }
2770
2771 int repo_config_get_bool(struct repository *repo,
2772 const char *key, int *dest)
2773 {
2774 git_config_check_init(repo);
2775 return git_configset_get_bool(repo->config, key, dest);
2776 }
2777
2778 int repo_config_get_bool_or_int(struct repository *repo,
2779 const char *key, int *is_bool, int *dest)
2780 {
2781 git_config_check_init(repo);
2782 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2783 }
2784
2785 int repo_config_get_maybe_bool(struct repository *repo,
2786 const char *key, int *dest)
2787 {
2788 git_config_check_init(repo);
2789 return git_configset_get_maybe_bool(repo->config, key, dest);
2790 }
2791
2792 int repo_config_get_pathname(struct repository *repo,
2793 const char *key, const char **dest)
2794 {
2795 int ret;
2796 git_config_check_init(repo);
2797 ret = git_configset_get_pathname(repo->config, key, dest);
2798 if (ret < 0)
2799 git_die_config(key, NULL);
2800 return ret;
2801 }
2802
2803 /* Read values into protected_config. */
2804 static void read_protected_config(void)
2805 {
2806 struct config_options opts = {
2807 .respect_includes = 1,
2808 .ignore_repo = 1,
2809 .ignore_worktree = 1,
2810 .system_gently = 1,
2811 };
2812
2813 git_configset_init(&protected_config);
2814 config_with_options(config_set_callback, &protected_config, NULL,
2815 NULL, &opts);
2816 }
2817
2818 void git_protected_config(config_fn_t fn, void *data)
2819 {
2820 if (!protected_config.hash_initialized)
2821 read_protected_config();
2822 configset_iter(&protected_config, fn, data);
2823 }
2824
2825 /* Functions used historically to read configuration from 'the_repository' */
2826 void git_config(config_fn_t fn, void *data)
2827 {
2828 repo_config(the_repository, fn, data);
2829 }
2830
2831 void git_config_clear(void)
2832 {
2833 repo_config_clear(the_repository);
2834 }
2835
2836 int git_config_get(const char *key)
2837 {
2838 return repo_config_get(the_repository, key);
2839 }
2840
2841 int git_config_get_value(const char *key, const char **value)
2842 {
2843 return repo_config_get_value(the_repository, key, value);
2844 }
2845
2846 int git_config_get_value_multi(const char *key, const struct string_list **dest)
2847 {
2848 return repo_config_get_value_multi(the_repository, key, dest);
2849 }
2850
2851 int git_config_get_string_multi(const char *key,
2852 const struct string_list **dest)
2853 {
2854 return repo_config_get_string_multi(the_repository, key, dest);
2855 }
2856
2857 int git_config_get_string(const char *key, char **dest)
2858 {
2859 return repo_config_get_string(the_repository, key, dest);
2860 }
2861
2862 int git_config_get_string_tmp(const char *key, const char **dest)
2863 {
2864 return repo_config_get_string_tmp(the_repository, key, dest);
2865 }
2866
2867 int git_config_get_int(const char *key, int *dest)
2868 {
2869 return repo_config_get_int(the_repository, key, dest);
2870 }
2871
2872 int git_config_get_ulong(const char *key, unsigned long *dest)
2873 {
2874 return repo_config_get_ulong(the_repository, key, dest);
2875 }
2876
2877 int git_config_get_bool(const char *key, int *dest)
2878 {
2879 return repo_config_get_bool(the_repository, key, dest);
2880 }
2881
2882 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2883 {
2884 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2885 }
2886
2887 int git_config_get_maybe_bool(const char *key, int *dest)
2888 {
2889 return repo_config_get_maybe_bool(the_repository, key, dest);
2890 }
2891
2892 int git_config_get_pathname(const char *key, const char **dest)
2893 {
2894 return repo_config_get_pathname(the_repository, key, dest);
2895 }
2896
2897 int git_config_get_expiry(const char *key, const char **output)
2898 {
2899 int ret = git_config_get_string(key, (char **)output);
2900 if (ret)
2901 return ret;
2902 if (strcmp(*output, "now")) {
2903 timestamp_t now = approxidate("now");
2904 if (approxidate(*output) >= now)
2905 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2906 }
2907 return ret;
2908 }
2909
2910 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2911 {
2912 const char *expiry_string;
2913 intmax_t days;
2914 timestamp_t when;
2915
2916 if (git_config_get_string_tmp(key, &expiry_string))
2917 return 1; /* no such thing */
2918
2919 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2920 const int scale = 86400;
2921 *expiry = now - days * scale;
2922 return 0;
2923 }
2924
2925 if (!parse_expiry_date(expiry_string, &when)) {
2926 *expiry = when;
2927 return 0;
2928 }
2929 return -1; /* thing exists but cannot be parsed */
2930 }
2931
2932 int git_config_get_split_index(void)
2933 {
2934 int val;
2935
2936 if (!git_config_get_maybe_bool("core.splitindex", &val))
2937 return val;
2938
2939 return -1; /* default value */
2940 }
2941
2942 int git_config_get_max_percent_split_change(void)
2943 {
2944 int val = -1;
2945
2946 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2947 if (0 <= val && val <= 100)
2948 return val;
2949
2950 return error(_("splitIndex.maxPercentChange value '%d' "
2951 "should be between 0 and 100"), val);
2952 }
2953
2954 return -1; /* default value */
2955 }
2956
2957 int git_config_get_index_threads(int *dest)
2958 {
2959 int is_bool, val;
2960
2961 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2962 if (val) {
2963 *dest = val;
2964 return 0;
2965 }
2966
2967 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2968 if (is_bool)
2969 *dest = val ? 0 : 1;
2970 else
2971 *dest = val;
2972 return 0;
2973 }
2974
2975 return 1;
2976 }
2977
2978 NORETURN
2979 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2980 {
2981 if (!filename)
2982 die(_("unable to parse '%s' from command-line config"), key);
2983 else
2984 die(_("bad config variable '%s' in file '%s' at line %d"),
2985 key, filename, linenr);
2986 }
2987
2988 NORETURN __attribute__((format(printf, 2, 3)))
2989 void git_die_config(const char *key, const char *err, ...)
2990 {
2991 const struct string_list *values;
2992 struct key_value_info *kv_info;
2993 report_fn error_fn = get_error_routine();
2994
2995 if (err) {
2996 va_list params;
2997 va_start(params, err);
2998 error_fn(err, params);
2999 va_end(params);
3000 }
3001 if (git_config_get_value_multi(key, &values))
3002 BUG("for key '%s' we must have a value to report on", key);
3003 kv_info = values->items[values->nr - 1].util;
3004 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
3005 }
3006
3007 /*
3008 * Find all the stuff for git_config_set() below.
3009 */
3010
3011 struct config_store_data {
3012 struct config_reader *config_reader;
3013 size_t baselen;
3014 char *key;
3015 int do_not_match;
3016 const char *fixed_value;
3017 regex_t *value_pattern;
3018 int multi_replace;
3019 struct {
3020 size_t begin, end;
3021 enum config_event_t type;
3022 int is_keys_section;
3023 } *parsed;
3024 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
3025 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
3026 };
3027 #define CONFIG_STORE_INIT { 0 }
3028
3029 static void config_store_data_clear(struct config_store_data *store)
3030 {
3031 free(store->key);
3032 if (store->value_pattern != NULL &&
3033 store->value_pattern != CONFIG_REGEX_NONE) {
3034 regfree(store->value_pattern);
3035 free(store->value_pattern);
3036 }
3037 free(store->parsed);
3038 free(store->seen);
3039 memset(store, 0, sizeof(*store));
3040 }
3041
3042 static int matches(const char *key, const char *value,
3043 const struct config_store_data *store)
3044 {
3045 if (strcmp(key, store->key))
3046 return 0; /* not ours */
3047 if (store->fixed_value)
3048 return !strcmp(store->fixed_value, value);
3049 if (!store->value_pattern)
3050 return 1; /* always matches */
3051 if (store->value_pattern == CONFIG_REGEX_NONE)
3052 return 0; /* never matches */
3053
3054 return store->do_not_match ^
3055 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
3056 }
3057
3058 static int store_aux_event(enum config_event_t type,
3059 size_t begin, size_t end, void *data)
3060 {
3061 struct config_store_data *store = data;
3062 struct config_source *cs = store->config_reader->source;
3063
3064 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
3065 store->parsed[store->parsed_nr].begin = begin;
3066 store->parsed[store->parsed_nr].end = end;
3067 store->parsed[store->parsed_nr].type = type;
3068
3069 if (type == CONFIG_EVENT_SECTION) {
3070 int (*cmpfn)(const char *, const char *, size_t);
3071
3072 if (cs->var.len < 2 || cs->var.buf[cs->var.len - 1] != '.')
3073 return error(_("invalid section name '%s'"), cs->var.buf);
3074
3075 if (cs->subsection_case_sensitive)
3076 cmpfn = strncasecmp;
3077 else
3078 cmpfn = strncmp;
3079
3080 /* Is this the section we were looking for? */
3081 store->is_keys_section =
3082 store->parsed[store->parsed_nr].is_keys_section =
3083 cs->var.len - 1 == store->baselen &&
3084 !cmpfn(cs->var.buf, store->key, store->baselen);
3085 if (store->is_keys_section) {
3086 store->section_seen = 1;
3087 ALLOC_GROW(store->seen, store->seen_nr + 1,
3088 store->seen_alloc);
3089 store->seen[store->seen_nr] = store->parsed_nr;
3090 }
3091 }
3092
3093 store->parsed_nr++;
3094
3095 return 0;
3096 }
3097
3098 static int store_aux(const char *key, const char *value,
3099 const struct config_context *ctx UNUSED, void *cb)
3100 {
3101 struct config_store_data *store = cb;
3102
3103 if (store->key_seen) {
3104 if (matches(key, value, store)) {
3105 if (store->seen_nr == 1 && store->multi_replace == 0) {
3106 warning(_("%s has multiple values"), key);
3107 }
3108
3109 ALLOC_GROW(store->seen, store->seen_nr + 1,
3110 store->seen_alloc);
3111
3112 store->seen[store->seen_nr] = store->parsed_nr;
3113 store->seen_nr++;
3114 }
3115 } else if (store->is_keys_section) {
3116 /*
3117 * Do not increment matches yet: this may not be a match, but we
3118 * are in the desired section.
3119 */
3120 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
3121 store->seen[store->seen_nr] = store->parsed_nr;
3122 store->section_seen = 1;
3123
3124 if (matches(key, value, store)) {
3125 store->seen_nr++;
3126 store->key_seen = 1;
3127 }
3128 }
3129
3130 return 0;
3131 }
3132
3133 static int write_error(const char *filename)
3134 {
3135 error(_("failed to write new configuration file %s"), filename);
3136
3137 /* Same error code as "failed to rename". */
3138 return 4;
3139 }
3140
3141 static struct strbuf store_create_section(const char *key,
3142 const struct config_store_data *store)
3143 {
3144 const char *dot;
3145 size_t i;
3146 struct strbuf sb = STRBUF_INIT;
3147
3148 dot = memchr(key, '.', store->baselen);
3149 if (dot) {
3150 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
3151 for (i = dot - key + 1; i < store->baselen; i++) {
3152 if (key[i] == '"' || key[i] == '\\')
3153 strbuf_addch(&sb, '\\');
3154 strbuf_addch(&sb, key[i]);
3155 }
3156 strbuf_addstr(&sb, "\"]\n");
3157 } else {
3158 strbuf_addch(&sb, '[');
3159 strbuf_add(&sb, key, store->baselen);
3160 strbuf_addstr(&sb, "]\n");
3161 }
3162
3163 return sb;
3164 }
3165
3166 static ssize_t write_section(int fd, const char *key,
3167 const struct config_store_data *store)
3168 {
3169 struct strbuf sb = store_create_section(key, store);
3170 ssize_t ret;
3171
3172 ret = write_in_full(fd, sb.buf, sb.len);
3173 strbuf_release(&sb);
3174
3175 return ret;
3176 }
3177
3178 static ssize_t write_pair(int fd, const char *key, const char *value,
3179 const struct config_store_data *store)
3180 {
3181 int i;
3182 ssize_t ret;
3183 const char *quote = "";
3184 struct strbuf sb = STRBUF_INIT;
3185
3186 /*
3187 * Check to see if the value needs to be surrounded with a dq pair.
3188 * Note that problematic characters are always backslash-quoted; this
3189 * check is about not losing leading or trailing SP and strings that
3190 * follow beginning-of-comment characters (i.e. ';' and '#') by the
3191 * configuration parser.
3192 */
3193 if (value[0] == ' ')
3194 quote = "\"";
3195 for (i = 0; value[i]; i++)
3196 if (value[i] == ';' || value[i] == '#')
3197 quote = "\"";
3198 if (i && value[i - 1] == ' ')
3199 quote = "\"";
3200
3201 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
3202
3203 for (i = 0; value[i]; i++)
3204 switch (value[i]) {
3205 case '\n':
3206 strbuf_addstr(&sb, "\\n");
3207 break;
3208 case '\t':
3209 strbuf_addstr(&sb, "\\t");
3210 break;
3211 case '"':
3212 case '\\':
3213 strbuf_addch(&sb, '\\');
3214 /* fallthrough */
3215 default:
3216 strbuf_addch(&sb, value[i]);
3217 break;
3218 }
3219 strbuf_addf(&sb, "%s\n", quote);
3220
3221 ret = write_in_full(fd, sb.buf, sb.len);
3222 strbuf_release(&sb);
3223
3224 return ret;
3225 }
3226
3227 /*
3228 * If we are about to unset the last key(s) in a section, and if there are
3229 * no comments surrounding (or included in) the section, we will want to
3230 * extend begin/end to remove the entire section.
3231 *
3232 * Note: the parameter `seen_ptr` points to the index into the store.seen
3233 * array. * This index may be incremented if a section has more than one
3234 * entry (which all are to be removed).
3235 */
3236 static void maybe_remove_section(struct config_store_data *store,
3237 size_t *begin_offset, size_t *end_offset,
3238 int *seen_ptr)
3239 {
3240 size_t begin;
3241 int i, seen, section_seen = 0;
3242
3243 /*
3244 * First, ensure that this is the first key, and that there are no
3245 * comments before the entry nor before the section header.
3246 */
3247 seen = *seen_ptr;
3248 for (i = store->seen[seen]; i > 0; i--) {
3249 enum config_event_t type = store->parsed[i - 1].type;
3250
3251 if (type == CONFIG_EVENT_COMMENT)
3252 /* There is a comment before this entry or section */
3253 return;
3254 if (type == CONFIG_EVENT_ENTRY) {
3255 if (!section_seen)
3256 /* This is not the section's first entry. */
3257 return;
3258 /* We encountered no comment before the section. */
3259 break;
3260 }
3261 if (type == CONFIG_EVENT_SECTION) {
3262 if (!store->parsed[i - 1].is_keys_section)
3263 break;
3264 section_seen = 1;
3265 }
3266 }
3267 begin = store->parsed[i].begin;
3268
3269 /*
3270 * Next, make sure that we are removing the last key(s) in the section,
3271 * and that there are no comments that are possibly about the current
3272 * section.
3273 */
3274 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
3275 enum config_event_t type = store->parsed[i].type;
3276
3277 if (type == CONFIG_EVENT_COMMENT)
3278 return;
3279 if (type == CONFIG_EVENT_SECTION) {
3280 if (store->parsed[i].is_keys_section)
3281 continue;
3282 break;
3283 }
3284 if (type == CONFIG_EVENT_ENTRY) {
3285 if (++seen < store->seen_nr &&
3286 i == store->seen[seen])
3287 /* We want to remove this entry, too */
3288 continue;
3289 /* There is another entry in this section. */
3290 return;
3291 }
3292 }
3293
3294 /*
3295 * We are really removing the last entry/entries from this section, and
3296 * there are no enclosed or surrounding comments. Remove the entire,
3297 * now-empty section.
3298 */
3299 *seen_ptr = seen;
3300 *begin_offset = begin;
3301 if (i < store->parsed_nr)
3302 *end_offset = store->parsed[i].begin;
3303 else
3304 *end_offset = store->parsed[store->parsed_nr - 1].end;
3305 }
3306
3307 int git_config_set_in_file_gently(const char *config_filename,
3308 const char *key, const char *value)
3309 {
3310 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
3311 }
3312
3313 void git_config_set_in_file(const char *config_filename,
3314 const char *key, const char *value)
3315 {
3316 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
3317 }
3318
3319 int git_config_set_gently(const char *key, const char *value)
3320 {
3321 return git_config_set_multivar_gently(key, value, NULL, 0);
3322 }
3323
3324 int repo_config_set_worktree_gently(struct repository *r,
3325 const char *key, const char *value)
3326 {
3327 /* Only use worktree-specific config if it is already enabled. */
3328 if (r->repository_format_worktree_config) {
3329 char *file = repo_git_path(r, "config.worktree");
3330 int ret = git_config_set_multivar_in_file_gently(
3331 file, key, value, NULL, 0);
3332 free(file);
3333 return ret;
3334 }
3335 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3336 }
3337
3338 void git_config_set(const char *key, const char *value)
3339 {
3340 git_config_set_multivar(key, value, NULL, 0);
3341
3342 trace2_cmd_set_config(key, value);
3343 }
3344
3345 /*
3346 * If value==NULL, unset in (remove from) config,
3347 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
3348 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
3349 * (only add a new one)
3350 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
3351 * key/values are removed before a single new pair is written. If the
3352 * flag is not present, then replace only the first match.
3353 *
3354 * Returns 0 on success.
3355 *
3356 * This function does this:
3357 *
3358 * - it locks the config file by creating ".git/config.lock"
3359 *
3360 * - it then parses the config using store_aux() as validator to find
3361 * the position on the key/value pair to replace. If it is to be unset,
3362 * it must be found exactly once.
3363 *
3364 * - the config file is mmap()ed and the part before the match (if any) is
3365 * written to the lock file, then the changed part and the rest.
3366 *
3367 * - the config file is removed and the lock file rename()d to it.
3368 *
3369 */
3370 int git_config_set_multivar_in_file_gently(const char *config_filename,
3371 const char *key, const char *value,
3372 const char *value_pattern,
3373 unsigned flags)
3374 {
3375 int fd = -1, in_fd = -1;
3376 int ret;
3377 struct lock_file lock = LOCK_INIT;
3378 char *filename_buf = NULL;
3379 char *contents = NULL;
3380 size_t contents_sz;
3381 struct config_store_data store = CONFIG_STORE_INIT;
3382
3383 store.config_reader = &the_reader;
3384
3385 /* parse-key returns negative; flip the sign to feed exit(3) */
3386 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
3387 if (ret)
3388 goto out_free;
3389
3390 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
3391
3392 if (!config_filename)
3393 config_filename = filename_buf = git_pathdup("config");
3394
3395 /*
3396 * The lock serves a purpose in addition to locking: the new
3397 * contents of .git/config will be written into it.
3398 */
3399 fd = hold_lock_file_for_update(&lock, config_filename, 0);
3400 if (fd < 0) {
3401 error_errno(_("could not lock config file %s"), config_filename);
3402 ret = CONFIG_NO_LOCK;
3403 goto out_free;
3404 }
3405
3406 /*
3407 * If .git/config does not exist yet, write a minimal version.
3408 */
3409 in_fd = open(config_filename, O_RDONLY);
3410 if ( in_fd < 0 ) {
3411 if ( ENOENT != errno ) {
3412 error_errno(_("opening %s"), config_filename);
3413 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
3414 goto out_free;
3415 }
3416 /* if nothing to unset, error out */
3417 if (!value) {
3418 ret = CONFIG_NOTHING_SET;
3419 goto out_free;
3420 }
3421
3422 free(store.key);
3423 store.key = xstrdup(key);
3424 if (write_section(fd, key, &store) < 0 ||
3425 write_pair(fd, key, value, &store) < 0)
3426 goto write_err_out;
3427 } else {
3428 struct stat st;
3429 size_t copy_begin, copy_end;
3430 int i, new_line = 0;
3431 struct config_options opts;
3432
3433 if (!value_pattern)
3434 store.value_pattern = NULL;
3435 else if (value_pattern == CONFIG_REGEX_NONE)
3436 store.value_pattern = CONFIG_REGEX_NONE;
3437 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
3438 store.fixed_value = value_pattern;
3439 else {
3440 if (value_pattern[0] == '!') {
3441 store.do_not_match = 1;
3442 value_pattern++;
3443 } else
3444 store.do_not_match = 0;
3445
3446 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3447 if (regcomp(store.value_pattern, value_pattern,
3448 REG_EXTENDED)) {
3449 error(_("invalid pattern: %s"), value_pattern);
3450 FREE_AND_NULL(store.value_pattern);
3451 ret = CONFIG_INVALID_PATTERN;
3452 goto out_free;
3453 }
3454 }
3455
3456 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3457 store.parsed[0].end = 0;
3458
3459 memset(&opts, 0, sizeof(opts));
3460 opts.event_fn = store_aux_event;
3461 opts.event_fn_data = &store;
3462
3463 /*
3464 * After this, store.parsed will contain offsets of all the
3465 * parsed elements, and store.seen will contain a list of
3466 * matches, as indices into store.parsed.
3467 *
3468 * As a side effect, we make sure to transform only a valid
3469 * existing config file.
3470 */
3471 if (git_config_from_file_with_options(store_aux,
3472 config_filename,
3473 &store, CONFIG_SCOPE_UNKNOWN,
3474 &opts)) {
3475 error(_("invalid config file %s"), config_filename);
3476 ret = CONFIG_INVALID_FILE;
3477 goto out_free;
3478 }
3479
3480 /* if nothing to unset, or too many matches, error out */
3481 if ((store.seen_nr == 0 && value == NULL) ||
3482 (store.seen_nr > 1 && !store.multi_replace)) {
3483 ret = CONFIG_NOTHING_SET;
3484 goto out_free;
3485 }
3486
3487 if (fstat(in_fd, &st) == -1) {
3488 error_errno(_("fstat on %s failed"), config_filename);
3489 ret = CONFIG_INVALID_FILE;
3490 goto out_free;
3491 }
3492
3493 contents_sz = xsize_t(st.st_size);
3494 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3495 MAP_PRIVATE, in_fd, 0);
3496 if (contents == MAP_FAILED) {
3497 if (errno == ENODEV && S_ISDIR(st.st_mode))
3498 errno = EISDIR;
3499 error_errno(_("unable to mmap '%s'%s"),
3500 config_filename, mmap_os_err());
3501 ret = CONFIG_INVALID_FILE;
3502 contents = NULL;
3503 goto out_free;
3504 }
3505 close(in_fd);
3506 in_fd = -1;
3507
3508 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3509 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3510 ret = CONFIG_NO_WRITE;
3511 goto out_free;
3512 }
3513
3514 if (store.seen_nr == 0) {
3515 if (!store.seen_alloc) {
3516 /* Did not see key nor section */
3517 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3518 store.seen[0] = store.parsed_nr
3519 - !!store.parsed_nr;
3520 }
3521 store.seen_nr = 1;
3522 }
3523
3524 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3525 size_t replace_end;
3526 int j = store.seen[i];
3527
3528 new_line = 0;
3529 if (!store.key_seen) {
3530 copy_end = store.parsed[j].end;
3531 /* include '\n' when copying section header */
3532 if (copy_end > 0 && copy_end < contents_sz &&
3533 contents[copy_end - 1] != '\n' &&
3534 contents[copy_end] == '\n')
3535 copy_end++;
3536 replace_end = copy_end;
3537 } else {
3538 replace_end = store.parsed[j].end;
3539 copy_end = store.parsed[j].begin;
3540 if (!value)
3541 maybe_remove_section(&store,
3542 &copy_end,
3543 &replace_end, &i);
3544 /*
3545 * Swallow preceding white-space on the same
3546 * line.
3547 */
3548 while (copy_end > 0 ) {
3549 char c = contents[copy_end - 1];
3550
3551 if (isspace(c) && c != '\n')
3552 copy_end--;
3553 else
3554 break;
3555 }
3556 }
3557
3558 if (copy_end > 0 && contents[copy_end-1] != '\n')
3559 new_line = 1;
3560
3561 /* write the first part of the config */
3562 if (copy_end > copy_begin) {
3563 if (write_in_full(fd, contents + copy_begin,
3564 copy_end - copy_begin) < 0)
3565 goto write_err_out;
3566 if (new_line &&
3567 write_str_in_full(fd, "\n") < 0)
3568 goto write_err_out;
3569 }
3570 copy_begin = replace_end;
3571 }
3572
3573 /* write the pair (value == NULL means unset) */
3574 if (value) {
3575 if (!store.section_seen) {
3576 if (write_section(fd, key, &store) < 0)
3577 goto write_err_out;
3578 }
3579 if (write_pair(fd, key, value, &store) < 0)
3580 goto write_err_out;
3581 }
3582
3583 /* write the rest of the config */
3584 if (copy_begin < contents_sz)
3585 if (write_in_full(fd, contents + copy_begin,
3586 contents_sz - copy_begin) < 0)
3587 goto write_err_out;
3588
3589 munmap(contents, contents_sz);
3590 contents = NULL;
3591 }
3592
3593 if (commit_lock_file(&lock) < 0) {
3594 error_errno(_("could not write config file %s"), config_filename);
3595 ret = CONFIG_NO_WRITE;
3596 goto out_free;
3597 }
3598
3599 ret = 0;
3600
3601 /* Invalidate the config cache */
3602 git_config_clear();
3603
3604 out_free:
3605 rollback_lock_file(&lock);
3606 free(filename_buf);
3607 if (contents)
3608 munmap(contents, contents_sz);
3609 if (in_fd >= 0)
3610 close(in_fd);
3611 config_store_data_clear(&store);
3612 return ret;
3613
3614 write_err_out:
3615 ret = write_error(get_lock_file_path(&lock));
3616 goto out_free;
3617
3618 }
3619
3620 void git_config_set_multivar_in_file(const char *config_filename,
3621 const char *key, const char *value,
3622 const char *value_pattern, unsigned flags)
3623 {
3624 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
3625 value_pattern, flags))
3626 return;
3627 if (value)
3628 die(_("could not set '%s' to '%s'"), key, value);
3629 else
3630 die(_("could not unset '%s'"), key);
3631 }
3632
3633 int git_config_set_multivar_gently(const char *key, const char *value,
3634 const char *value_pattern, unsigned flags)
3635 {
3636 return repo_config_set_multivar_gently(the_repository, key, value,
3637 value_pattern, flags);
3638 }
3639
3640 int repo_config_set_multivar_gently(struct repository *r, const char *key,
3641 const char *value,
3642 const char *value_pattern, unsigned flags)
3643 {
3644 char *file = repo_git_path(r, "config");
3645 int res = git_config_set_multivar_in_file_gently(file,
3646 key, value,
3647 value_pattern,
3648 flags);
3649 free(file);
3650 return res;
3651 }
3652
3653 void git_config_set_multivar(const char *key, const char *value,
3654 const char *value_pattern, unsigned flags)
3655 {
3656 git_config_set_multivar_in_file(git_path("config"),
3657 key, value, value_pattern,
3658 flags);
3659 }
3660
3661 static size_t section_name_match (const char *buf, const char *name)
3662 {
3663 size_t i = 0, j = 0;
3664 int dot = 0;
3665 if (buf[i] != '[')
3666 return 0;
3667 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3668 if (!dot && isspace(buf[i])) {
3669 dot = 1;
3670 if (name[j++] != '.')
3671 break;
3672 for (i++; isspace(buf[i]); i++)
3673 ; /* do nothing */
3674 if (buf[i] != '"')
3675 break;
3676 continue;
3677 }
3678 if (buf[i] == '\\' && dot)
3679 i++;
3680 else if (buf[i] == '"' && dot) {
3681 for (i++; isspace(buf[i]); i++)
3682 ; /* do_nothing */
3683 break;
3684 }
3685 if (buf[i] != name[j++])
3686 break;
3687 }
3688 if (buf[i] == ']' && name[j] == 0) {
3689 /*
3690 * We match, now just find the right length offset by
3691 * gobbling up any whitespace after it, as well
3692 */
3693 i++;
3694 for (; buf[i] && isspace(buf[i]); i++)
3695 ; /* do nothing */
3696 return i;
3697 }
3698 return 0;
3699 }
3700
3701 static int section_name_is_ok(const char *name)
3702 {
3703 /* Empty section names are bogus. */
3704 if (!*name)
3705 return 0;
3706
3707 /*
3708 * Before a dot, we must be alphanumeric or dash. After the first dot,
3709 * anything goes, so we can stop checking.
3710 */
3711 for (; *name && *name != '.'; name++)
3712 if (*name != '-' && !isalnum(*name))
3713 return 0;
3714 return 1;
3715 }
3716
3717 #define GIT_CONFIG_MAX_LINE_LEN (512 * 1024)
3718
3719 /* if new_name == NULL, the section is removed instead */
3720 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3721 const char *old_name,
3722 const char *new_name, int copy)
3723 {
3724 int ret = 0, remove = 0;
3725 char *filename_buf = NULL;
3726 struct lock_file lock = LOCK_INIT;
3727 int out_fd;
3728 struct strbuf buf = STRBUF_INIT;
3729 FILE *config_file = NULL;
3730 struct stat st;
3731 struct strbuf copystr = STRBUF_INIT;
3732 struct config_store_data store;
3733 uint32_t line_nr = 0;
3734
3735 memset(&store, 0, sizeof(store));
3736
3737 if (new_name && !section_name_is_ok(new_name)) {
3738 ret = error(_("invalid section name: %s"), new_name);
3739 goto out_no_rollback;
3740 }
3741
3742 if (!config_filename)
3743 config_filename = filename_buf = git_pathdup("config");
3744
3745 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3746 if (out_fd < 0) {
3747 ret = error(_("could not lock config file %s"), config_filename);
3748 goto out;
3749 }
3750
3751 if (!(config_file = fopen(config_filename, "rb"))) {
3752 ret = warn_on_fopen_errors(config_filename);
3753 if (ret)
3754 goto out;
3755 /* no config file means nothing to rename, no error */
3756 goto commit_and_out;
3757 }
3758
3759 if (fstat(fileno(config_file), &st) == -1) {
3760 ret = error_errno(_("fstat on %s failed"), config_filename);
3761 goto out;
3762 }
3763
3764 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3765 ret = error_errno(_("chmod on %s failed"),
3766 get_lock_file_path(&lock));
3767 goto out;
3768 }
3769
3770 while (!strbuf_getwholeline(&buf, config_file, '\n')) {
3771 size_t i, length;
3772 int is_section = 0;
3773 char *output = buf.buf;
3774
3775 line_nr++;
3776
3777 if (buf.len >= GIT_CONFIG_MAX_LINE_LEN) {
3778 ret = error(_("refusing to work with overly long line "
3779 "in '%s' on line %"PRIuMAX),
3780 config_filename, (uintmax_t)line_nr);
3781 goto out;
3782 }
3783
3784 for (i = 0; buf.buf[i] && isspace(buf.buf[i]); i++)
3785 ; /* do nothing */
3786 if (buf.buf[i] == '[') {
3787 /* it's a section */
3788 size_t offset;
3789 is_section = 1;
3790
3791 /*
3792 * When encountering a new section under -c we
3793 * need to flush out any section we're already
3794 * coping and begin anew. There might be
3795 * multiple [branch "$name"] sections.
3796 */
3797 if (copystr.len > 0) {
3798 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3799 ret = write_error(get_lock_file_path(&lock));
3800 goto out;
3801 }
3802 strbuf_reset(&copystr);
3803 }
3804
3805 offset = section_name_match(&buf.buf[i], old_name);
3806 if (offset > 0) {
3807 ret++;
3808 if (!new_name) {
3809 remove = 1;
3810 continue;
3811 }
3812 store.baselen = strlen(new_name);
3813 if (!copy) {
3814 if (write_section(out_fd, new_name, &store) < 0) {
3815 ret = write_error(get_lock_file_path(&lock));
3816 goto out;
3817 }
3818 /*
3819 * We wrote out the new section, with
3820 * a newline, now skip the old
3821 * section's length
3822 */
3823 output += offset + i;
3824 if (strlen(output) > 0) {
3825 /*
3826 * More content means there's
3827 * a declaration to put on the
3828 * next line; indent with a
3829 * tab
3830 */
3831 output -= 1;
3832 output[0] = '\t';
3833 }
3834 } else {
3835 strbuf_release(&copystr);
3836 copystr = store_create_section(new_name, &store);
3837 }
3838 }
3839 remove = 0;
3840 }
3841 if (remove)
3842 continue;
3843 length = strlen(output);
3844
3845 if (!is_section && copystr.len > 0) {
3846 strbuf_add(&copystr, output, length);
3847 }
3848
3849 if (write_in_full(out_fd, output, length) < 0) {
3850 ret = write_error(get_lock_file_path(&lock));
3851 goto out;
3852 }
3853 }
3854
3855 /*
3856 * Copy a trailing section at the end of the config, won't be
3857 * flushed by the usual "flush because we have a new section
3858 * logic in the loop above.
3859 */
3860 if (copystr.len > 0) {
3861 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3862 ret = write_error(get_lock_file_path(&lock));
3863 goto out;
3864 }
3865 strbuf_reset(&copystr);
3866 }
3867
3868 fclose(config_file);
3869 config_file = NULL;
3870 commit_and_out:
3871 if (commit_lock_file(&lock) < 0)
3872 ret = error_errno(_("could not write config file %s"),
3873 config_filename);
3874 out:
3875 if (config_file)
3876 fclose(config_file);
3877 rollback_lock_file(&lock);
3878 out_no_rollback:
3879 free(filename_buf);
3880 config_store_data_clear(&store);
3881 strbuf_release(&buf);
3882 strbuf_release(&copystr);
3883 return ret;
3884 }
3885
3886 int git_config_rename_section_in_file(const char *config_filename,
3887 const char *old_name, const char *new_name)
3888 {
3889 return git_config_copy_or_rename_section_in_file(config_filename,
3890 old_name, new_name, 0);
3891 }
3892
3893 int git_config_rename_section(const char *old_name, const char *new_name)
3894 {
3895 return git_config_rename_section_in_file(NULL, old_name, new_name);
3896 }
3897
3898 int git_config_copy_section_in_file(const char *config_filename,
3899 const char *old_name, const char *new_name)
3900 {
3901 return git_config_copy_or_rename_section_in_file(config_filename,
3902 old_name, new_name, 1);
3903 }
3904
3905 int git_config_copy_section(const char *old_name, const char *new_name)
3906 {
3907 return git_config_copy_section_in_file(NULL, old_name, new_name);
3908 }
3909
3910 /*
3911 * Call this to report error for your variable that should not
3912 * get a boolean value (i.e. "[my] var" means "true").
3913 */
3914 #undef config_error_nonbool
3915 int config_error_nonbool(const char *var)
3916 {
3917 return error(_("missing value for '%s'"), var);
3918 }
3919
3920 int parse_config_key(const char *var,
3921 const char *section,
3922 const char **subsection, size_t *subsection_len,
3923 const char **key)
3924 {
3925 const char *dot;
3926
3927 /* Does it start with "section." ? */
3928 if (!skip_prefix(var, section, &var) || *var != '.')
3929 return -1;
3930
3931 /*
3932 * Find the key; we don't know yet if we have a subsection, but we must
3933 * parse backwards from the end, since the subsection may have dots in
3934 * it, too.
3935 */
3936 dot = strrchr(var, '.');
3937 *key = dot + 1;
3938
3939 /* Did we have a subsection at all? */
3940 if (dot == var) {
3941 if (subsection) {
3942 *subsection = NULL;
3943 *subsection_len = 0;
3944 }
3945 }
3946 else {
3947 if (!subsection)
3948 return -1;
3949 *subsection = var + 1;
3950 *subsection_len = dot - *subsection;
3951 }
3952
3953 return 0;
3954 }
3955
3956 const char *config_origin_type_name(enum config_origin_type type)
3957 {
3958 switch (type) {
3959 case CONFIG_ORIGIN_BLOB:
3960 return "blob";
3961 case CONFIG_ORIGIN_FILE:
3962 return "file";
3963 case CONFIG_ORIGIN_STDIN:
3964 return "standard input";
3965 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3966 return "submodule-blob";
3967 case CONFIG_ORIGIN_CMDLINE:
3968 return "command line";
3969 default:
3970 BUG("unknown config origin type");
3971 }
3972 }
3973
3974 const char *config_scope_name(enum config_scope scope)
3975 {
3976 switch (scope) {
3977 case CONFIG_SCOPE_SYSTEM:
3978 return "system";
3979 case CONFIG_SCOPE_GLOBAL:
3980 return "global";
3981 case CONFIG_SCOPE_LOCAL:
3982 return "local";
3983 case CONFIG_SCOPE_WORKTREE:
3984 return "worktree";
3985 case CONFIG_SCOPE_COMMAND:
3986 return "command";
3987 case CONFIG_SCOPE_SUBMODULE:
3988 return "submodule";
3989 default:
3990 return "unknown";
3991 }
3992 }
3993
3994 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3995 {
3996 int i;
3997
3998 for (i = 0; i < nr_mapping; i++) {
3999 const char *name = mapping[i];
4000
4001 if (name && !strcasecmp(var, name))
4002 return i;
4003 }
4004 return -1;
4005 }
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