]> git.ipfire.org Git - thirdparty/git.git/blame_incremental - config.c
projects / thirdparty / git.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
The sixth batch
[thirdparty/git.git] / config.c
... / ...
CommitLineData
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8
9#define USE_THE_REPOSITORY_VARIABLE
10#define DISABLE_SIGN_COMPARE_WARNINGS
11
12#include "git-compat-util.h"
13#include "abspath.h"
14#include "advice.h"
15#include "date.h"
16#include "branch.h"
17#include "config.h"
18#include "parse.h"
19#include "convert.h"
20#include "environment.h"
21#include "gettext.h"
22#include "git-zlib.h"
23#include "ident.h"
24#include "repository.h"
25#include "lockfile.h"
26#include "mailmap.h"
27#include "attr.h"
28#include "exec-cmd.h"
29#include "strbuf.h"
30#include "quote.h"
31#include "hashmap.h"
32#include "string-list.h"
33#include "object-name.h"
34#include "object-store.h"
35#include "pager.h"
36#include "path.h"
37#include "utf8.h"
38#include "color.h"
39#include "refs.h"
40#include "setup.h"
41#include "strvec.h"
42#include "trace2.h"
43#include "wildmatch.h"
44#include "ws.h"
45#include "write-or-die.h"
46
47struct config_source {
48 struct config_source *prev;
49 union {
50 FILE *file;
51 struct config_buf {
52 const char *buf;
53 size_t len;
54 size_t pos;
55 } buf;
56 } u;
57 enum config_origin_type origin_type;
58 const char *name;
59 const char *path;
60 enum config_error_action default_error_action;
61 int linenr;
62 int eof;
63 size_t total_len;
64 struct strbuf value;
65 struct strbuf var;
66 unsigned subsection_case_sensitive : 1;
67
68 int (*do_fgetc)(struct config_source *c);
69 int (*do_ungetc)(int c, struct config_source *conf);
70 long (*do_ftell)(struct config_source *c);
71};
72#define CONFIG_SOURCE_INIT { 0 }
73
74static int pack_compression_seen;
75static int zlib_compression_seen;
76
77/*
78 * Config that comes from trusted scopes, namely:
79 * - CONFIG_SCOPE_SYSTEM (e.g. /etc/gitconfig)
80 * - CONFIG_SCOPE_GLOBAL (e.g. $HOME/.gitconfig, $XDG_CONFIG_HOME/git)
81 * - CONFIG_SCOPE_COMMAND (e.g. "-c" option, environment variables)
82 *
83 * This is declared here for code cleanliness, but unlike the other
84 * static variables, this does not hold config parser state.
85 */
86static struct config_set protected_config;
87
88static int config_file_fgetc(struct config_source *conf)
89{
90 return getc_unlocked(conf->u.file);
91}
92
93static int config_file_ungetc(int c, struct config_source *conf)
94{
95 return ungetc(c, conf->u.file);
96}
97
98static long config_file_ftell(struct config_source *conf)
99{
100 return ftell(conf->u.file);
101}
102
103static int config_buf_fgetc(struct config_source *conf)
104{
105 if (conf->u.buf.pos < conf->u.buf.len)
106 return conf->u.buf.buf[conf->u.buf.pos++];
107
108 return EOF;
109}
110
111static int config_buf_ungetc(int c, struct config_source *conf)
112{
113 if (conf->u.buf.pos > 0) {
114 conf->u.buf.pos--;
115 if (conf->u.buf.buf[conf->u.buf.pos] != c)
116 BUG("config_buf can only ungetc the same character");
117 return c;
118 }
119
120 return EOF;
121}
122
123static long config_buf_ftell(struct config_source *conf)
124{
125 return conf->u.buf.pos;
126}
127
128struct config_include_data {
129 int depth;
130 config_fn_t fn;
131 void *data;
132 const struct config_options *opts;
133 const struct git_config_source *config_source;
134 struct repository *repo;
135
136 /*
137 * All remote URLs discovered when reading all config files.
138 */
139 struct string_list *remote_urls;
140};
141#define CONFIG_INCLUDE_INIT { 0 }
142
143static int git_config_include(const char *var, const char *value,
144 const struct config_context *ctx, void *data);
145
146#define MAX_INCLUDE_DEPTH 10
147static const char include_depth_advice[] = N_(
148"exceeded maximum include depth (%d) while including\n"
149" %s\n"
150"from\n"
151" %s\n"
152"This might be due to circular includes.");
153static int handle_path_include(const struct key_value_info *kvi,
154 const char *path,
155 struct config_include_data *inc)
156{
157 int ret = 0;
158 struct strbuf buf = STRBUF_INIT;
159 char *expanded;
160
161 if (!path)
162 return config_error_nonbool("include.path");
163
164 expanded = interpolate_path(path, 0);
165 if (!expanded)
166 return error(_("could not expand include path '%s'"), path);
167 path = expanded;
168
169 /*
170 * Use an absolute path as-is, but interpret relative paths
171 * based on the including config file.
172 */
173 if (!is_absolute_path(path)) {
174 char *slash;
175
176 if (!kvi || !kvi->path) {
177 ret = error(_("relative config includes must come from files"));
178 goto cleanup;
179 }
180
181 slash = find_last_dir_sep(kvi->path);
182 if (slash)
183 strbuf_add(&buf, kvi->path, slash - kvi->path + 1);
184 strbuf_addstr(&buf, path);
185 path = buf.buf;
186 }
187
188 if (!access_or_die(path, R_OK, 0)) {
189 if (++inc->depth > MAX_INCLUDE_DEPTH)
190 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
191 !kvi ? "<unknown>" :
192 kvi->filename ? kvi->filename :
193 "the command line");
194 ret = git_config_from_file_with_options(git_config_include, path, inc,
195 kvi->scope, NULL);
196 inc->depth--;
197 }
198cleanup:
199 strbuf_release(&buf);
200 free(expanded);
201 return ret;
202}
203
204static void add_trailing_starstar_for_dir(struct strbuf *pat)
205{
206 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
207 strbuf_addstr(pat, "**");
208}
209
210static int prepare_include_condition_pattern(const struct key_value_info *kvi,
211 struct strbuf *pat)
212{
213 struct strbuf path = STRBUF_INIT;
214 char *expanded;
215 int prefix = 0;
216
217 expanded = interpolate_path(pat->buf, 1);
218 if (expanded) {
219 strbuf_reset(pat);
220 strbuf_addstr(pat, expanded);
221 free(expanded);
222 }
223
224 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
225 const char *slash;
226
227 if (!kvi || !kvi->path)
228 return error(_("relative config include "
229 "conditionals must come from files"));
230
231 strbuf_realpath(&path, kvi->path, 1);
232 slash = find_last_dir_sep(path.buf);
233 if (!slash)
234 BUG("how is this possible?");
235 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
236 prefix = slash - path.buf + 1 /* slash */;
237 } else if (!is_absolute_path(pat->buf))
238 strbuf_insertstr(pat, 0, "**/");
239
240 add_trailing_starstar_for_dir(pat);
241
242 strbuf_release(&path);
243 return prefix;
244}
245
246static int include_by_gitdir(const struct key_value_info *kvi,
247 const struct config_options *opts,
248 const char *cond, size_t cond_len, int icase)
249{
250 struct strbuf text = STRBUF_INIT;
251 struct strbuf pattern = STRBUF_INIT;
252 int ret = 0, prefix;
253 const char *git_dir;
254 int already_tried_absolute = 0;
255
256 if (opts->git_dir)
257 git_dir = opts->git_dir;
258 else
259 goto done;
260
261 strbuf_realpath(&text, git_dir, 1);
262 strbuf_add(&pattern, cond, cond_len);
263 prefix = prepare_include_condition_pattern(kvi, &pattern);
264
265again:
266 if (prefix < 0)
267 goto done;
268
269 if (prefix > 0) {
270 /*
271 * perform literal matching on the prefix part so that
272 * any wildcard character in it can't create side effects.
273 */
274 if (text.len < prefix)
275 goto done;
276 if (!icase && strncmp(pattern.buf, text.buf, prefix))
277 goto done;
278 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
279 goto done;
280 }
281
282 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
283 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
284
285 if (!ret && !already_tried_absolute) {
286 /*
287 * We've tried e.g. matching gitdir:~/work, but if
288 * ~/work is a symlink to /mnt/storage/work
289 * strbuf_realpath() will expand it, so the rule won't
290 * match. Let's match against a
291 * strbuf_add_absolute_path() version of the path,
292 * which'll do the right thing
293 */
294 strbuf_reset(&text);
295 strbuf_add_absolute_path(&text, git_dir);
296 already_tried_absolute = 1;
297 goto again;
298 }
299done:
300 strbuf_release(&pattern);
301 strbuf_release(&text);
302 return ret;
303}
304
305static int include_by_branch(struct config_include_data *data,
306 const char *cond, size_t cond_len)
307{
308 int flags;
309 int ret;
310 struct strbuf pattern = STRBUF_INIT;
311 const char *refname, *shortname;
312
313 if (!data->repo || data->repo->ref_storage_format == REF_STORAGE_FORMAT_UNKNOWN)
314 return 0;
315
316 refname = refs_resolve_ref_unsafe(get_main_ref_store(data->repo),
317 "HEAD", 0, NULL, &flags);
318 if (!refname ||
319 !(flags & REF_ISSYMREF) ||
320 !skip_prefix(refname, "refs/heads/", &shortname))
321 return 0;
322
323 strbuf_add(&pattern, cond, cond_len);
324 add_trailing_starstar_for_dir(&pattern);
325 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
326 strbuf_release(&pattern);
327 return ret;
328}
329
330static int add_remote_url(const char *var, const char *value,
331 const struct config_context *ctx UNUSED, void *data)
332{
333 struct string_list *remote_urls = data;
334 const char *remote_name;
335 size_t remote_name_len;
336 const char *key;
337
338 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
339 &key) &&
340 remote_name &&
341 !strcmp(key, "url"))
342 string_list_append(remote_urls, value);
343 return 0;
344}
345
346static void populate_remote_urls(struct config_include_data *inc)
347{
348 struct config_options opts;
349
350 opts = *inc->opts;
351 opts.unconditional_remote_url = 1;
352
353 inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
354 string_list_init_dup(inc->remote_urls);
355 config_with_options(add_remote_url, inc->remote_urls,
356 inc->config_source, inc->repo, &opts);
357}
358
359static int forbid_remote_url(const char *var, const char *value UNUSED,
360 const struct config_context *ctx UNUSED,
361 void *data UNUSED)
362{
363 const char *remote_name;
364 size_t remote_name_len;
365 const char *key;
366
367 if (!parse_config_key(var, "remote", &remote_name, &remote_name_len,
368 &key) &&
369 remote_name &&
370 !strcmp(key, "url"))
371 die(_("remote URLs cannot be configured in file directly or indirectly included by includeIf.hasconfig:remote.*.url"));
372 return 0;
373}
374
375static int at_least_one_url_matches_glob(const char *glob, int glob_len,
376 struct string_list *remote_urls)
377{
378 struct strbuf pattern = STRBUF_INIT;
379 struct string_list_item *url_item;
380 int found = 0;
381
382 strbuf_add(&pattern, glob, glob_len);
383 for_each_string_list_item(url_item, remote_urls) {
384 if (!wildmatch(pattern.buf, url_item->string, WM_PATHNAME)) {
385 found = 1;
386 break;
387 }
388 }
389 strbuf_release(&pattern);
390 return found;
391}
392
393static int include_by_remote_url(struct config_include_data *inc,
394 const char *cond, size_t cond_len)
395{
396 if (inc->opts->unconditional_remote_url)
397 return 1;
398 if (!inc->remote_urls)
399 populate_remote_urls(inc);
400 return at_least_one_url_matches_glob(cond, cond_len,
401 inc->remote_urls);
402}
403
404static int include_condition_is_true(const struct key_value_info *kvi,
405 struct config_include_data *inc,
406 const char *cond, size_t cond_len)
407{
408 const struct config_options *opts = inc->opts;
409
410 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
411 return include_by_gitdir(kvi, opts, cond, cond_len, 0);
412 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
413 return include_by_gitdir(kvi, opts, cond, cond_len, 1);
414 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
415 return include_by_branch(inc, cond, cond_len);
416 else if (skip_prefix_mem(cond, cond_len, "hasconfig:remote.*.url:", &cond,
417 &cond_len))
418 return include_by_remote_url(inc, cond, cond_len);
419
420 /* unknown conditionals are always false */
421 return 0;
422}
423
424static int git_config_include(const char *var, const char *value,
425 const struct config_context *ctx,
426 void *data)
427{
428 struct config_include_data *inc = data;
429 const char *cond, *key;
430 size_t cond_len;
431 int ret;
432
433 /*
434 * Pass along all values, including "include" directives; this makes it
435 * possible to query information on the includes themselves.
436 */
437 ret = inc->fn(var, value, ctx, inc->data);
438 if (ret < 0)
439 return ret;
440
441 if (!strcmp(var, "include.path"))
442 ret = handle_path_include(ctx->kvi, value, inc);
443
444 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
445 cond && include_condition_is_true(ctx->kvi, inc, cond, cond_len) &&
446 !strcmp(key, "path")) {
447 config_fn_t old_fn = inc->fn;
448
449 if (inc->opts->unconditional_remote_url)
450 inc->fn = forbid_remote_url;
451 ret = handle_path_include(ctx->kvi, value, inc);
452 inc->fn = old_fn;
453 }
454
455 return ret;
456}
457
458static void git_config_push_split_parameter(const char *key, const char *value)
459{
460 struct strbuf env = STRBUF_INIT;
461 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
462 if (old && *old) {
463 strbuf_addstr(&env, old);
464 strbuf_addch(&env, ' ');
465 }
466 sq_quote_buf(&env, key);
467 strbuf_addch(&env, '=');
468 if (value)
469 sq_quote_buf(&env, value);
470 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
471 strbuf_release(&env);
472}
473
474void git_config_push_parameter(const char *text)
475{
476 const char *value;
477
478 /*
479 * When we see:
480 *
481 * section.subsection=with=equals.key=value
482 *
483 * we cannot tell if it means:
484 *
485 * [section "subsection=with=equals"]
486 * key = value
487 *
488 * or:
489 *
490 * [section]
491 * subsection = with=equals.key=value
492 *
493 * We parse left-to-right for the first "=", meaning we'll prefer to
494 * keep the value intact over the subsection. This is historical, but
495 * also sensible since values are more likely to contain odd or
496 * untrusted input than a section name.
497 *
498 * A missing equals is explicitly allowed (as a bool-only entry).
499 */
500 value = strchr(text, '=');
501 if (value) {
502 char *key = xmemdupz(text, value - text);
503 git_config_push_split_parameter(key, value + 1);
504 free(key);
505 } else {
506 git_config_push_split_parameter(text, NULL);
507 }
508}
509
510void git_config_push_env(const char *spec)
511{
512 char *key;
513 const char *env_name;
514 const char *env_value;
515
516 env_name = strrchr(spec, '=');
517 if (!env_name)
518 die(_("invalid config format: %s"), spec);
519 key = xmemdupz(spec, env_name - spec);
520 env_name++;
521 if (!*env_name)
522 die(_("missing environment variable name for configuration '%.*s'"),
523 (int)(env_name - spec - 1), spec);
524
525 env_value = getenv(env_name);
526 if (!env_value)
527 die(_("missing environment variable '%s' for configuration '%.*s'"),
528 env_name, (int)(env_name - spec - 1), spec);
529
530 git_config_push_split_parameter(key, env_value);
531 free(key);
532}
533
534static inline int iskeychar(int c)
535{
536 return isalnum(c) || c == '-';
537}
538
539/*
540 * Auxiliary function to sanity-check and split the key into the section
541 * identifier and variable name.
542 *
543 * Returns 0 on success, -1 when there is an invalid character in the key and
544 * -2 if there is no section name in the key.
545 *
546 * store_key - pointer to char* which will hold a copy of the key with
547 * lowercase section and variable name
548 * baselen - pointer to size_t which will hold the length of the
549 * section + subsection part, can be NULL
550 */
551int git_config_parse_key(const char *key, char **store_key, size_t *baselen_)
552{
553 size_t i, baselen;
554 int dot;
555 const char *last_dot = strrchr(key, '.');
556
557 /*
558 * Since "key" actually contains the section name and the real
559 * key name separated by a dot, we have to know where the dot is.
560 */
561
562 if (last_dot == NULL || last_dot == key) {
563 error(_("key does not contain a section: %s"), key);
564 return -CONFIG_NO_SECTION_OR_NAME;
565 }
566
567 if (!last_dot[1]) {
568 error(_("key does not contain variable name: %s"), key);
569 return -CONFIG_NO_SECTION_OR_NAME;
570 }
571
572 baselen = last_dot - key;
573 if (baselen_)
574 *baselen_ = baselen;
575
576 /*
577 * Validate the key and while at it, lower case it for matching.
578 */
579 *store_key = xmallocz(strlen(key));
580
581 dot = 0;
582 for (i = 0; key[i]; i++) {
583 unsigned char c = key[i];
584 if (c == '.')
585 dot = 1;
586 /* Leave the extended basename untouched.. */
587 if (!dot || i > baselen) {
588 if (!iskeychar(c) ||
589 (i == baselen + 1 && !isalpha(c))) {
590 error(_("invalid key: %s"), key);
591 goto out_free_ret_1;
592 }
593 c = tolower(c);
594 } else if (c == '\n') {
595 error(_("invalid key (newline): %s"), key);
596 goto out_free_ret_1;
597 }
598 (*store_key)[i] = c;
599 }
600
601 return 0;
602
603out_free_ret_1:
604 FREE_AND_NULL(*store_key);
605 return -CONFIG_INVALID_KEY;
606}
607
608static int config_parse_pair(const char *key, const char *value,
609 struct key_value_info *kvi,
610 config_fn_t fn, void *data)
611{
612 char *canonical_name;
613 int ret;
614 struct config_context ctx = {
615 .kvi = kvi,
616 };
617
618 if (!strlen(key))
619 return error(_("empty config key"));
620 if (git_config_parse_key(key, &canonical_name, NULL))
621 return -1;
622
623 ret = (fn(canonical_name, value, &ctx, data) < 0) ? -1 : 0;
624 free(canonical_name);
625 return ret;
626}
627
628
629/* for values read from `git_config_from_parameters()` */
630void kvi_from_param(struct key_value_info *out)
631{
632 out->filename = NULL;
633 out->linenr = -1;
634 out->origin_type = CONFIG_ORIGIN_CMDLINE;
635 out->scope = CONFIG_SCOPE_COMMAND;
636 out->path = NULL;
637}
638
639int git_config_parse_parameter(const char *text,
640 config_fn_t fn, void *data)
641{
642 const char *value;
643 struct strbuf **pair;
644 int ret;
645 struct key_value_info kvi = KVI_INIT;
646
647 kvi_from_param(&kvi);
648
649 pair = strbuf_split_str(text, '=', 2);
650 if (!pair[0])
651 return error(_("bogus config parameter: %s"), text);
652
653 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
654 strbuf_setlen(pair[0], pair[0]->len - 1);
655 value = pair[1] ? pair[1]->buf : "";
656 } else {
657 value = NULL;
658 }
659
660 strbuf_trim(pair[0]);
661 if (!pair[0]->len) {
662 strbuf_list_free(pair);
663 return error(_("bogus config parameter: %s"), text);
664 }
665
666 ret = config_parse_pair(pair[0]->buf, value, &kvi, fn, data);
667 strbuf_list_free(pair);
668 return ret;
669}
670
671static int parse_config_env_list(char *env, struct key_value_info *kvi,
672 config_fn_t fn, void *data)
673{
674 char *cur = env;
675 while (cur && *cur) {
676 const char *key = sq_dequote_step(cur, &cur);
677 if (!key)
678 return error(_("bogus format in %s"),
679 CONFIG_DATA_ENVIRONMENT);
680
681 if (!cur || isspace(*cur)) {
682 /* old-style 'key=value' */
683 if (git_config_parse_parameter(key, fn, data) < 0)
684 return -1;
685 }
686 else if (*cur == '=') {
687 /* new-style 'key'='value' */
688 const char *value;
689
690 cur++;
691 if (*cur == '\'') {
692 /* quoted value */
693 value = sq_dequote_step(cur, &cur);
694 if (!value || (cur && !isspace(*cur))) {
695 return error(_("bogus format in %s"),
696 CONFIG_DATA_ENVIRONMENT);
697 }
698 } else if (!*cur || isspace(*cur)) {
699 /* implicit bool: 'key'= */
700 value = NULL;
701 } else {
702 return error(_("bogus format in %s"),
703 CONFIG_DATA_ENVIRONMENT);
704 }
705
706 if (config_parse_pair(key, value, kvi, fn, data) < 0)
707 return -1;
708 }
709 else {
710 /* unknown format */
711 return error(_("bogus format in %s"),
712 CONFIG_DATA_ENVIRONMENT);
713 }
714
715 if (cur) {
716 while (isspace(*cur))
717 cur++;
718 }
719 }
720 return 0;
721}
722
723int git_config_from_parameters(config_fn_t fn, void *data)
724{
725 const char *env;
726 struct strbuf envvar = STRBUF_INIT;
727 struct strvec to_free = STRVEC_INIT;
728 int ret = 0;
729 char *envw = NULL;
730 struct key_value_info kvi = KVI_INIT;
731
732 kvi_from_param(&kvi);
733 env = getenv(CONFIG_COUNT_ENVIRONMENT);
734 if (env) {
735 unsigned long count;
736 char *endp;
737 int i;
738
739 count = strtoul(env, &endp, 10);
740 if (*endp) {
741 ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
742 goto out;
743 }
744 if (count > INT_MAX) {
745 ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
746 goto out;
747 }
748
749 for (i = 0; i < count; i++) {
750 const char *key, *value;
751
752 strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
753 key = getenv_safe(&to_free, envvar.buf);
754 if (!key) {
755 ret = error(_("missing config key %s"), envvar.buf);
756 goto out;
757 }
758 strbuf_reset(&envvar);
759
760 strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
761 value = getenv_safe(&to_free, envvar.buf);
762 if (!value) {
763 ret = error(_("missing config value %s"), envvar.buf);
764 goto out;
765 }
766 strbuf_reset(&envvar);
767
768 if (config_parse_pair(key, value, &kvi, fn, data) < 0) {
769 ret = -1;
770 goto out;
771 }
772 }
773 }
774
775 env = getenv(CONFIG_DATA_ENVIRONMENT);
776 if (env) {
777 /* sq_dequote will write over it */
778 envw = xstrdup(env);
779 if (parse_config_env_list(envw, &kvi, fn, data) < 0) {
780 ret = -1;
781 goto out;
782 }
783 }
784
785out:
786 strbuf_release(&envvar);
787 strvec_clear(&to_free);
788 free(envw);
789 return ret;
790}
791
792static int get_next_char(struct config_source *cs)
793{
794 int c = cs->do_fgetc(cs);
795
796 if (c == '\r') {
797 /* DOS like systems */
798 c = cs->do_fgetc(cs);
799 if (c != '\n') {
800 if (c != EOF)
801 cs->do_ungetc(c, cs);
802 c = '\r';
803 }
804 }
805
806 if (c != EOF && ++cs->total_len > INT_MAX) {
807 /*
808 * This is an absurdly long config file; refuse to parse
809 * further in order to protect downstream code from integer
810 * overflows. Note that we can't return an error specifically,
811 * but we can mark EOF and put trash in the return value,
812 * which will trigger a parse error.
813 */
814 cs->eof = 1;
815 return 0;
816 }
817
818 if (c == '\n')
819 cs->linenr++;
820 if (c == EOF) {
821 cs->eof = 1;
822 cs->linenr++;
823 c = '\n';
824 }
825 return c;
826}
827
828static char *parse_value(struct config_source *cs)
829{
830 int quote = 0, comment = 0;
831 size_t trim_len = 0;
832
833 strbuf_reset(&cs->value);
834 for (;;) {
835 int c = get_next_char(cs);
836 if (c == '\n') {
837 if (quote) {
838 cs->linenr--;
839 return NULL;
840 }
841 if (trim_len)
842 strbuf_setlen(&cs->value, trim_len);
843 return cs->value.buf;
844 }
845 if (comment)
846 continue;
847 if (isspace(c) && !quote) {
848 if (!trim_len)
849 trim_len = cs->value.len;
850 if (cs->value.len)
851 strbuf_addch(&cs->value, c);
852 continue;
853 }
854 if (!quote) {
855 if (c == ';' || c == '#') {
856 comment = 1;
857 continue;
858 }
859 }
860 if (trim_len)
861 trim_len = 0;
862 if (c == '\\') {
863 c = get_next_char(cs);
864 switch (c) {
865 case '\n':
866 continue;
867 case 't':
868 c = '\t';
869 break;
870 case 'b':
871 c = '\b';
872 break;
873 case 'n':
874 c = '\n';
875 break;
876 /* Some characters escape as themselves */
877 case '\\': case '"':
878 break;
879 /* Reject unknown escape sequences */
880 default:
881 return NULL;
882 }
883 strbuf_addch(&cs->value, c);
884 continue;
885 }
886 if (c == '"') {
887 quote = 1 - quote;
888 continue;
889 }
890 strbuf_addch(&cs->value, c);
891 }
892}
893
894static int get_value(struct config_source *cs, struct key_value_info *kvi,
895 config_fn_t fn, void *data, struct strbuf *name)
896{
897 int c;
898 char *value;
899 int ret;
900 struct config_context ctx = {
901 .kvi = kvi,
902 };
903
904 /* Get the full name */
905 for (;;) {
906 c = get_next_char(cs);
907 if (cs->eof)
908 break;
909 if (!iskeychar(c))
910 break;
911 strbuf_addch(name, tolower(c));
912 }
913
914 while (c == ' ' || c == '\t')
915 c = get_next_char(cs);
916
917 value = NULL;
918 if (c != '\n') {
919 if (c != '=')
920 return -1;
921 value = parse_value(cs);
922 if (!value)
923 return -1;
924 }
925 /*
926 * We already consumed the \n, but we need linenr to point to
927 * the line we just parsed during the call to fn to get
928 * accurate line number in error messages.
929 */
930 cs->linenr--;
931 kvi->linenr = cs->linenr;
932 ret = fn(name->buf, value, &ctx, data);
933 if (ret >= 0)
934 cs->linenr++;
935 return ret;
936}
937
938static int get_extended_base_var(struct config_source *cs, struct strbuf *name,
939 int c)
940{
941 cs->subsection_case_sensitive = 0;
942 do {
943 if (c == '\n')
944 goto error_incomplete_line;
945 c = get_next_char(cs);
946 } while (isspace(c));
947
948 /* We require the format to be '[base "extension"]' */
949 if (c != '"')
950 return -1;
951 strbuf_addch(name, '.');
952
953 for (;;) {
954 int c = get_next_char(cs);
955 if (c == '\n')
956 goto error_incomplete_line;
957 if (c == '"')
958 break;
959 if (c == '\\') {
960 c = get_next_char(cs);
961 if (c == '\n')
962 goto error_incomplete_line;
963 }
964 strbuf_addch(name, c);
965 }
966
967 /* Final ']' */
968 if (get_next_char(cs) != ']')
969 return -1;
970 return 0;
971error_incomplete_line:
972 cs->linenr--;
973 return -1;
974}
975
976static int get_base_var(struct config_source *cs, struct strbuf *name)
977{
978 cs->subsection_case_sensitive = 1;
979 for (;;) {
980 int c = get_next_char(cs);
981 if (cs->eof)
982 return -1;
983 if (c == ']')
984 return 0;
985 if (isspace(c))
986 return get_extended_base_var(cs, name, c);
987 if (!iskeychar(c) && c != '.')
988 return -1;
989 strbuf_addch(name, tolower(c));
990 }
991}
992
993struct parse_event_data {
994 enum config_event_t previous_type;
995 size_t previous_offset;
996 const struct config_options *opts;
997};
998
999static int do_event(struct config_source *cs, enum config_event_t type,
1000 struct parse_event_data *data)
1001{
1002 size_t offset;
1003
1004 if (!data->opts || !data->opts->event_fn)
1005 return 0;
1006
1007 if (type == CONFIG_EVENT_WHITESPACE &&
1008 data->previous_type == type)
1009 return 0;
1010
1011 offset = cs->do_ftell(cs);
1012 /*
1013 * At EOF, the parser always "inserts" an extra '\n', therefore
1014 * the end offset of the event is the current file position, otherwise
1015 * we will already have advanced to the next event.
1016 */
1017 if (type != CONFIG_EVENT_EOF)
1018 offset--;
1019
1020 if (data->previous_type != CONFIG_EVENT_EOF &&
1021 data->opts->event_fn(data->previous_type, data->previous_offset,
1022 offset, cs, data->opts->event_fn_data) < 0)
1023 return -1;
1024
1025 data->previous_type = type;
1026 data->previous_offset = offset;
1027
1028 return 0;
1029}
1030
1031static void kvi_from_source(struct config_source *cs,
1032 enum config_scope scope,
1033 struct key_value_info *out)
1034{
1035 out->filename = strintern(cs->name);
1036 out->origin_type = cs->origin_type;
1037 out->linenr = cs->linenr;
1038 out->scope = scope;
1039 out->path = cs->path;
1040}
1041
1042static int git_parse_source(struct config_source *cs, config_fn_t fn,
1043 struct key_value_info *kvi, void *data,
1044 const struct config_options *opts)
1045{
1046 int comment = 0;
1047 size_t baselen = 0;
1048 struct strbuf *var = &cs->var;
1049 int error_return = 0;
1050 char *error_msg = NULL;
1051
1052 /* U+FEFF Byte Order Mark in UTF8 */
1053 const char *bomptr = utf8_bom;
1054
1055 /* For the parser event callback */
1056 struct parse_event_data event_data = {
1057 CONFIG_EVENT_EOF, 0, opts
1058 };
1059
1060 for (;;) {
1061 int c;
1062
1063 c = get_next_char(cs);
1064 if (bomptr && *bomptr) {
1065 /* We are at the file beginning; skip UTF8-encoded BOM
1066 * if present. Sane editors won't put this in on their
1067 * own, but e.g. Windows Notepad will do it happily. */
1068 if (c == (*bomptr & 0377)) {
1069 bomptr++;
1070 continue;
1071 } else {
1072 /* Do not tolerate partial BOM. */
1073 if (bomptr != utf8_bom)
1074 break;
1075 /* No BOM at file beginning. Cool. */
1076 bomptr = NULL;
1077 }
1078 }
1079 if (c == '\n') {
1080 if (cs->eof) {
1081 if (do_event(cs, CONFIG_EVENT_EOF, &event_data) < 0)
1082 return -1;
1083 return 0;
1084 }
1085 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1086 return -1;
1087 comment = 0;
1088 continue;
1089 }
1090 if (comment)
1091 continue;
1092 if (isspace(c)) {
1093 if (do_event(cs, CONFIG_EVENT_WHITESPACE, &event_data) < 0)
1094 return -1;
1095 continue;
1096 }
1097 if (c == '#' || c == ';') {
1098 if (do_event(cs, CONFIG_EVENT_COMMENT, &event_data) < 0)
1099 return -1;
1100 comment = 1;
1101 continue;
1102 }
1103 if (c == '[') {
1104 if (do_event(cs, CONFIG_EVENT_SECTION, &event_data) < 0)
1105 return -1;
1106
1107 /* Reset prior to determining a new stem */
1108 strbuf_reset(var);
1109 if (get_base_var(cs, var) < 0 || var->len < 1)
1110 break;
1111 strbuf_addch(var, '.');
1112 baselen = var->len;
1113 continue;
1114 }
1115 if (!isalpha(c))
1116 break;
1117
1118 if (do_event(cs, CONFIG_EVENT_ENTRY, &event_data) < 0)
1119 return -1;
1120
1121 /*
1122 * Truncate the var name back to the section header
1123 * stem prior to grabbing the suffix part of the name
1124 * and the value.
1125 */
1126 strbuf_setlen(var, baselen);
1127 strbuf_addch(var, tolower(c));
1128 if (get_value(cs, kvi, fn, data, var) < 0)
1129 break;
1130 }
1131
1132 if (do_event(cs, CONFIG_EVENT_ERROR, &event_data) < 0)
1133 return -1;
1134
1135 switch (cs->origin_type) {
1136 case CONFIG_ORIGIN_BLOB:
1137 error_msg = xstrfmt(_("bad config line %d in blob %s"),
1138 cs->linenr, cs->name);
1139 break;
1140 case CONFIG_ORIGIN_FILE:
1141 error_msg = xstrfmt(_("bad config line %d in file %s"),
1142 cs->linenr, cs->name);
1143 break;
1144 case CONFIG_ORIGIN_STDIN:
1145 error_msg = xstrfmt(_("bad config line %d in standard input"),
1146 cs->linenr);
1147 break;
1148 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1149 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
1150 cs->linenr, cs->name);
1151 break;
1152 case CONFIG_ORIGIN_CMDLINE:
1153 error_msg = xstrfmt(_("bad config line %d in command line %s"),
1154 cs->linenr, cs->name);
1155 break;
1156 default:
1157 error_msg = xstrfmt(_("bad config line %d in %s"),
1158 cs->linenr, cs->name);
1159 }
1160
1161 switch (opts && opts->error_action ?
1162 opts->error_action :
1163 cs->default_error_action) {
1164 case CONFIG_ERROR_DIE:
1165 die("%s", error_msg);
1166 break;
1167 case CONFIG_ERROR_ERROR:
1168 error_return = error("%s", error_msg);
1169 break;
1170 case CONFIG_ERROR_SILENT:
1171 error_return = -1;
1172 break;
1173 case CONFIG_ERROR_UNSET:
1174 BUG("config error action unset");
1175 }
1176
1177 free(error_msg);
1178 return error_return;
1179}
1180
1181NORETURN
1182static void die_bad_number(const char *name, const char *value,
1183 const struct key_value_info *kvi)
1184{
1185 const char *error_type = (errno == ERANGE) ?
1186 N_("out of range") : N_("invalid unit");
1187 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
1188
1189 if (!kvi)
1190 BUG("kvi should not be NULL");
1191
1192 if (!value)
1193 value = "";
1194
1195 if (!kvi->filename)
1196 die(_(bad_numeric), value, name, _(error_type));
1197
1198 switch (kvi->origin_type) {
1199 case CONFIG_ORIGIN_BLOB:
1200 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
1201 value, name, kvi->filename, _(error_type));
1202 case CONFIG_ORIGIN_FILE:
1203 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1204 value, name, kvi->filename, _(error_type));
1205 case CONFIG_ORIGIN_STDIN:
1206 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1207 value, name, _(error_type));
1208 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1209 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1210 value, name, kvi->filename, _(error_type));
1211 case CONFIG_ORIGIN_CMDLINE:
1212 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1213 value, name, kvi->filename, _(error_type));
1214 default:
1215 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1216 value, name, kvi->filename, _(error_type));
1217 }
1218}
1219
1220int git_config_int(const char *name, const char *value,
1221 const struct key_value_info *kvi)
1222{
1223 int ret;
1224 if (!git_parse_int(value, &ret))
1225 die_bad_number(name, value, kvi);
1226 return ret;
1227}
1228
1229int64_t git_config_int64(const char *name, const char *value,
1230 const struct key_value_info *kvi)
1231{
1232 int64_t ret;
1233 if (!git_parse_int64(value, &ret))
1234 die_bad_number(name, value, kvi);
1235 return ret;
1236}
1237
1238unsigned long git_config_ulong(const char *name, const char *value,
1239 const struct key_value_info *kvi)
1240{
1241 unsigned long ret;
1242 if (!git_parse_ulong(value, &ret))
1243 die_bad_number(name, value, kvi);
1244 return ret;
1245}
1246
1247ssize_t git_config_ssize_t(const char *name, const char *value,
1248 const struct key_value_info *kvi)
1249{
1250 ssize_t ret;
1251 if (!git_parse_ssize_t(value, &ret))
1252 die_bad_number(name, value, kvi);
1253 return ret;
1254}
1255
1256double git_config_double(const char *name, const char *value,
1257 const struct key_value_info *kvi)
1258{
1259 double ret;
1260 if (!git_parse_double(value, &ret))
1261 die_bad_number(name, value, kvi);
1262 return ret;
1263}
1264
1265static const struct fsync_component_name {
1266 const char *name;
1267 enum fsync_component component_bits;
1268} fsync_component_names[] = {
1269 { "loose-object", FSYNC_COMPONENT_LOOSE_OBJECT },
1270 { "pack", FSYNC_COMPONENT_PACK },
1271 { "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
1272 { "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
1273 { "index", FSYNC_COMPONENT_INDEX },
1274 { "objects", FSYNC_COMPONENTS_OBJECTS },
1275 { "reference", FSYNC_COMPONENT_REFERENCE },
1276 { "derived-metadata", FSYNC_COMPONENTS_DERIVED_METADATA },
1277 { "committed", FSYNC_COMPONENTS_COMMITTED },
1278 { "added", FSYNC_COMPONENTS_ADDED },
1279 { "all", FSYNC_COMPONENTS_ALL },
1280};
1281
1282static enum fsync_component parse_fsync_components(const char *var, const char *string)
1283{
1284 enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
1285 enum fsync_component positive = 0, negative = 0;
1286
1287 while (string) {
1288 int i;
1289 size_t len;
1290 const char *ep;
1291 int negated = 0;
1292 int found = 0;
1293
1294 string = string + strspn(string, ", \t\n\r");
1295 ep = strchrnul(string, ',');
1296 len = ep - string;
1297 if (!strcmp(string, "none")) {
1298 current = FSYNC_COMPONENT_NONE;
1299 goto next_name;
1300 }
1301
1302 if (*string == '-') {
1303 negated = 1;
1304 string++;
1305 len--;
1306 if (!len)
1307 warning(_("invalid value for variable %s"), var);
1308 }
1309
1310 if (!len)
1311 break;
1312
1313 for (i = 0; i < ARRAY_SIZE(fsync_component_names); ++i) {
1314 const struct fsync_component_name *n = &fsync_component_names[i];
1315
1316 if (strncmp(n->name, string, len))
1317 continue;
1318
1319 found = 1;
1320 if (negated)
1321 negative |= n->component_bits;
1322 else
1323 positive |= n->component_bits;
1324 }
1325
1326 if (!found) {
1327 char *component = xstrndup(string, len);
1328 warning(_("ignoring unknown core.fsync component '%s'"), component);
1329 free(component);
1330 }
1331
1332next_name:
1333 string = ep;
1334 }
1335
1336 return (current & ~negative) | positive;
1337}
1338
1339int git_config_bool_or_int(const char *name, const char *value,
1340 const struct key_value_info *kvi, int *is_bool)
1341{
1342 int v = git_parse_maybe_bool_text(value);
1343 if (0 <= v) {
1344 *is_bool = 1;
1345 return v;
1346 }
1347 *is_bool = 0;
1348 return git_config_int(name, value, kvi);
1349}
1350
1351int git_config_bool(const char *name, const char *value)
1352{
1353 int v = git_parse_maybe_bool(value);
1354 if (v < 0)
1355 die(_("bad boolean config value '%s' for '%s'"), value, name);
1356 return v;
1357}
1358
1359int git_config_string(char **dest, const char *var, const char *value)
1360{
1361 if (!value)
1362 return config_error_nonbool(var);
1363 *dest = xstrdup(value);
1364 return 0;
1365}
1366
1367int git_config_pathname(char **dest, const char *var, const char *value)
1368{
1369 if (!value)
1370 return config_error_nonbool(var);
1371 *dest = interpolate_path(value, 0);
1372 if (!*dest)
1373 die(_("failed to expand user dir in: '%s'"), value);
1374 return 0;
1375}
1376
1377int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1378{
1379 if (!value)
1380 return config_error_nonbool(var);
1381 if (parse_expiry_date(value, timestamp))
1382 return error(_("'%s' for '%s' is not a valid timestamp"),
1383 value, var);
1384 return 0;
1385}
1386
1387int git_config_color(char *dest, const char *var, const char *value)
1388{
1389 if (!value)
1390 return config_error_nonbool(var);
1391 if (color_parse(value, dest) < 0)
1392 return -1;
1393 return 0;
1394}
1395
1396static int git_default_core_config(const char *var, const char *value,
1397 const struct config_context *ctx, void *cb)
1398{
1399 /* This needs a better name */
1400 if (!strcmp(var, "core.filemode")) {
1401 trust_executable_bit = git_config_bool(var, value);
1402 return 0;
1403 }
1404 if (!strcmp(var, "core.trustctime")) {
1405 trust_ctime = git_config_bool(var, value);
1406 return 0;
1407 }
1408 if (!strcmp(var, "core.checkstat")) {
1409 if (!value)
1410 return config_error_nonbool(var);
1411 if (!strcasecmp(value, "default"))
1412 check_stat = 1;
1413 else if (!strcasecmp(value, "minimal"))
1414 check_stat = 0;
1415 else
1416 return error(_("invalid value for '%s': '%s'"),
1417 var, value);
1418 }
1419
1420 if (!strcmp(var, "core.quotepath")) {
1421 quote_path_fully = git_config_bool(var, value);
1422 return 0;
1423 }
1424
1425 if (!strcmp(var, "core.symlinks")) {
1426 has_symlinks = git_config_bool(var, value);
1427 return 0;
1428 }
1429
1430 if (!strcmp(var, "core.ignorecase")) {
1431 ignore_case = git_config_bool(var, value);
1432 return 0;
1433 }
1434
1435 if (!strcmp(var, "core.attributesfile")) {
1436 FREE_AND_NULL(git_attributes_file);
1437 return git_config_pathname(&git_attributes_file, var, value);
1438 }
1439
1440 if (!strcmp(var, "core.bare")) {
1441 is_bare_repository_cfg = git_config_bool(var, value);
1442 return 0;
1443 }
1444
1445 if (!strcmp(var, "core.ignorestat")) {
1446 assume_unchanged = git_config_bool(var, value);
1447 return 0;
1448 }
1449
1450 if (!strcmp(var, "core.abbrev")) {
1451 if (!value)
1452 return config_error_nonbool(var);
1453 if (!strcasecmp(value, "auto"))
1454 default_abbrev = -1;
1455 else if (!git_parse_maybe_bool_text(value))
1456 default_abbrev = GIT_MAX_HEXSZ;
1457 else {
1458 int abbrev = git_config_int(var, value, ctx->kvi);
1459 if (abbrev < minimum_abbrev)
1460 return error(_("abbrev length out of range: %d"), abbrev);
1461 default_abbrev = abbrev;
1462 }
1463 return 0;
1464 }
1465
1466 if (!strcmp(var, "core.disambiguate"))
1467 return set_disambiguate_hint_config(var, value);
1468
1469 if (!strcmp(var, "core.loosecompression")) {
1470 int level = git_config_int(var, value, ctx->kvi);
1471 if (level == -1)
1472 level = Z_DEFAULT_COMPRESSION;
1473 else if (level < 0 || level > Z_BEST_COMPRESSION)
1474 die(_("bad zlib compression level %d"), level);
1475 zlib_compression_level = level;
1476 zlib_compression_seen = 1;
1477 return 0;
1478 }
1479
1480 if (!strcmp(var, "core.compression")) {
1481 int level = git_config_int(var, value, ctx->kvi);
1482 if (level == -1)
1483 level = Z_DEFAULT_COMPRESSION;
1484 else if (level < 0 || level > Z_BEST_COMPRESSION)
1485 die(_("bad zlib compression level %d"), level);
1486 if (!zlib_compression_seen)
1487 zlib_compression_level = level;
1488 if (!pack_compression_seen)
1489 pack_compression_level = level;
1490 return 0;
1491 }
1492
1493 if (!strcmp(var, "core.autocrlf")) {
1494 if (value && !strcasecmp(value, "input")) {
1495 auto_crlf = AUTO_CRLF_INPUT;
1496 return 0;
1497 }
1498 auto_crlf = git_config_bool(var, value);
1499 return 0;
1500 }
1501
1502 if (!strcmp(var, "core.safecrlf")) {
1503 int eol_rndtrp_die;
1504 if (value && !strcasecmp(value, "warn")) {
1505 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1506 return 0;
1507 }
1508 eol_rndtrp_die = git_config_bool(var, value);
1509 global_conv_flags_eol = eol_rndtrp_die ?
1510 CONV_EOL_RNDTRP_DIE : 0;
1511 return 0;
1512 }
1513
1514 if (!strcmp(var, "core.eol")) {
1515 if (value && !strcasecmp(value, "lf"))
1516 core_eol = EOL_LF;
1517 else if (value && !strcasecmp(value, "crlf"))
1518 core_eol = EOL_CRLF;
1519 else if (value && !strcasecmp(value, "native"))
1520 core_eol = EOL_NATIVE;
1521 else
1522 core_eol = EOL_UNSET;
1523 return 0;
1524 }
1525
1526 if (!strcmp(var, "core.checkroundtripencoding")) {
1527 FREE_AND_NULL(check_roundtrip_encoding);
1528 return git_config_string(&check_roundtrip_encoding, var, value);
1529 }
1530
1531 if (!strcmp(var, "core.editor")) {
1532 FREE_AND_NULL(editor_program);
1533 return git_config_string(&editor_program, var, value);
1534 }
1535
1536 if (!strcmp(var, "core.commentchar") ||
1537 !strcmp(var, "core.commentstring")) {
1538 if (!value)
1539 return config_error_nonbool(var);
1540 else if (!strcasecmp(value, "auto"))
1541 auto_comment_line_char = 1;
1542 else if (value[0]) {
1543 if (strchr(value, '\n'))
1544 return error(_("%s cannot contain newline"), var);
1545 comment_line_str = value;
1546 FREE_AND_NULL(comment_line_str_to_free);
1547 auto_comment_line_char = 0;
1548 } else
1549 return error(_("%s must have at least one character"), var);
1550 return 0;
1551 }
1552
1553 if (!strcmp(var, "core.askpass")) {
1554 FREE_AND_NULL(askpass_program);
1555 return git_config_string(&askpass_program, var, value);
1556 }
1557
1558 if (!strcmp(var, "core.excludesfile")) {
1559 FREE_AND_NULL(excludes_file);
1560 return git_config_pathname(&excludes_file, var, value);
1561 }
1562
1563 if (!strcmp(var, "core.whitespace")) {
1564 if (!value)
1565 return config_error_nonbool(var);
1566 whitespace_rule_cfg = parse_whitespace_rule(value);
1567 return 0;
1568 }
1569
1570 if (!strcmp(var, "core.fsync")) {
1571 if (!value)
1572 return config_error_nonbool(var);
1573 fsync_components = parse_fsync_components(var, value);
1574 return 0;
1575 }
1576
1577 if (!strcmp(var, "core.fsyncmethod")) {
1578 if (!value)
1579 return config_error_nonbool(var);
1580 if (!strcmp(value, "fsync"))
1581 fsync_method = FSYNC_METHOD_FSYNC;
1582 else if (!strcmp(value, "writeout-only"))
1583 fsync_method = FSYNC_METHOD_WRITEOUT_ONLY;
1584 else if (!strcmp(value, "batch"))
1585 fsync_method = FSYNC_METHOD_BATCH;
1586 else
1587 warning(_("ignoring unknown core.fsyncMethod value '%s'"), value);
1588
1589 }
1590
1591 if (!strcmp(var, "core.fsyncobjectfiles")) {
1592 if (fsync_object_files < 0)
1593 warning(_("core.fsyncObjectFiles is deprecated; use core.fsync instead"));
1594 fsync_object_files = git_config_bool(var, value);
1595 return 0;
1596 }
1597
1598 if (!strcmp(var, "core.createobject")) {
1599 if (!value)
1600 return config_error_nonbool(var);
1601 if (!strcmp(value, "rename"))
1602 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1603 else if (!strcmp(value, "link"))
1604 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1605 else
1606 die(_("invalid mode for object creation: %s"), value);
1607 return 0;
1608 }
1609
1610 if (!strcmp(var, "core.sparsecheckout")) {
1611 core_apply_sparse_checkout = git_config_bool(var, value);
1612 return 0;
1613 }
1614
1615 if (!strcmp(var, "core.sparsecheckoutcone")) {
1616 core_sparse_checkout_cone = git_config_bool(var, value);
1617 return 0;
1618 }
1619
1620 if (!strcmp(var, "core.precomposeunicode")) {
1621 precomposed_unicode = git_config_bool(var, value);
1622 return 0;
1623 }
1624
1625 if (!strcmp(var, "core.protecthfs")) {
1626 protect_hfs = git_config_bool(var, value);
1627 return 0;
1628 }
1629
1630 if (!strcmp(var, "core.protectntfs")) {
1631 protect_ntfs = git_config_bool(var, value);
1632 return 0;
1633 }
1634
1635 if (!strcmp(var, "core.maxtreedepth")) {
1636 max_allowed_tree_depth = git_config_int(var, value, ctx->kvi);
1637 return 0;
1638 }
1639
1640 /* Add other config variables here and to Documentation/config.adoc. */
1641 return platform_core_config(var, value, ctx, cb);
1642}
1643
1644static int git_default_sparse_config(const char *var, const char *value)
1645{
1646 if (!strcmp(var, "sparse.expectfilesoutsideofpatterns")) {
1647 sparse_expect_files_outside_of_patterns = git_config_bool(var, value);
1648 return 0;
1649 }
1650
1651 /* Add other config variables here and to Documentation/config/sparse.adoc. */
1652 return 0;
1653}
1654
1655static int git_default_i18n_config(const char *var, const char *value)
1656{
1657 if (!strcmp(var, "i18n.commitencoding")) {
1658 FREE_AND_NULL(git_commit_encoding);
1659 return git_config_string(&git_commit_encoding, var, value);
1660 }
1661
1662 if (!strcmp(var, "i18n.logoutputencoding")) {
1663 FREE_AND_NULL(git_log_output_encoding);
1664 return git_config_string(&git_log_output_encoding, var, value);
1665 }
1666
1667 /* Add other config variables here and to Documentation/config.adoc. */
1668 return 0;
1669}
1670
1671static int git_default_branch_config(const char *var, const char *value)
1672{
1673 if (!strcmp(var, "branch.autosetupmerge")) {
1674 if (value && !strcmp(value, "always")) {
1675 git_branch_track = BRANCH_TRACK_ALWAYS;
1676 return 0;
1677 } else if (value && !strcmp(value, "inherit")) {
1678 git_branch_track = BRANCH_TRACK_INHERIT;
1679 return 0;
1680 } else if (value && !strcmp(value, "simple")) {
1681 git_branch_track = BRANCH_TRACK_SIMPLE;
1682 return 0;
1683 }
1684 git_branch_track = git_config_bool(var, value);
1685 return 0;
1686 }
1687 if (!strcmp(var, "branch.autosetuprebase")) {
1688 if (!value)
1689 return config_error_nonbool(var);
1690 else if (!strcmp(value, "never"))
1691 autorebase = AUTOREBASE_NEVER;
1692 else if (!strcmp(value, "local"))
1693 autorebase = AUTOREBASE_LOCAL;
1694 else if (!strcmp(value, "remote"))
1695 autorebase = AUTOREBASE_REMOTE;
1696 else if (!strcmp(value, "always"))
1697 autorebase = AUTOREBASE_ALWAYS;
1698 else
1699 return error(_("malformed value for %s"), var);
1700 return 0;
1701 }
1702
1703 /* Add other config variables here and to Documentation/config.adoc. */
1704 return 0;
1705}
1706
1707static int git_default_push_config(const char *var, const char *value)
1708{
1709 if (!strcmp(var, "push.default")) {
1710 if (!value)
1711 return config_error_nonbool(var);
1712 else if (!strcmp(value, "nothing"))
1713 push_default = PUSH_DEFAULT_NOTHING;
1714 else if (!strcmp(value, "matching"))
1715 push_default = PUSH_DEFAULT_MATCHING;
1716 else if (!strcmp(value, "simple"))
1717 push_default = PUSH_DEFAULT_SIMPLE;
1718 else if (!strcmp(value, "upstream"))
1719 push_default = PUSH_DEFAULT_UPSTREAM;
1720 else if (!strcmp(value, "tracking")) /* deprecated */
1721 push_default = PUSH_DEFAULT_UPSTREAM;
1722 else if (!strcmp(value, "current"))
1723 push_default = PUSH_DEFAULT_CURRENT;
1724 else {
1725 error(_("malformed value for %s: %s"), var, value);
1726 return error(_("must be one of nothing, matching, simple, "
1727 "upstream or current"));
1728 }
1729 return 0;
1730 }
1731
1732 /* Add other config variables here and to Documentation/config.adoc. */
1733 return 0;
1734}
1735
1736static int git_default_mailmap_config(const char *var, const char *value)
1737{
1738 if (!strcmp(var, "mailmap.file")) {
1739 FREE_AND_NULL(git_mailmap_file);
1740 return git_config_pathname(&git_mailmap_file, var, value);
1741 }
1742
1743 if (!strcmp(var, "mailmap.blob")) {
1744 FREE_AND_NULL(git_mailmap_blob);
1745 return git_config_string(&git_mailmap_blob, var, value);
1746 }
1747
1748 /* Add other config variables here and to Documentation/config.adoc. */
1749 return 0;
1750}
1751
1752static int git_default_attr_config(const char *var, const char *value)
1753{
1754 if (!strcmp(var, "attr.tree")) {
1755 FREE_AND_NULL(git_attr_tree);
1756 return git_config_string(&git_attr_tree, var, value);
1757 }
1758
1759 /*
1760 * Add other attribute related config variables here and to
1761 * Documentation/config/attr.adoc.
1762 */
1763 return 0;
1764}
1765
1766int git_default_config(const char *var, const char *value,
1767 const struct config_context *ctx, void *cb)
1768{
1769 if (starts_with(var, "core."))
1770 return git_default_core_config(var, value, ctx, cb);
1771
1772 if (starts_with(var, "user.") ||
1773 starts_with(var, "author.") ||
1774 starts_with(var, "committer."))
1775 return git_ident_config(var, value, ctx, cb);
1776
1777 if (starts_with(var, "i18n."))
1778 return git_default_i18n_config(var, value);
1779
1780 if (starts_with(var, "branch."))
1781 return git_default_branch_config(var, value);
1782
1783 if (starts_with(var, "push."))
1784 return git_default_push_config(var, value);
1785
1786 if (starts_with(var, "mailmap."))
1787 return git_default_mailmap_config(var, value);
1788
1789 if (starts_with(var, "attr."))
1790 return git_default_attr_config(var, value);
1791
1792 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1793 return git_default_advice_config(var, value);
1794
1795 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1796 pager_use_color = git_config_bool(var,value);
1797 return 0;
1798 }
1799
1800 if (!strcmp(var, "pack.packsizelimit")) {
1801 pack_size_limit_cfg = git_config_ulong(var, value, ctx->kvi);
1802 return 0;
1803 }
1804
1805 if (!strcmp(var, "pack.compression")) {
1806 int level = git_config_int(var, value, ctx->kvi);
1807 if (level == -1)
1808 level = Z_DEFAULT_COMPRESSION;
1809 else if (level < 0 || level > Z_BEST_COMPRESSION)
1810 die(_("bad pack compression level %d"), level);
1811 pack_compression_level = level;
1812 pack_compression_seen = 1;
1813 return 0;
1814 }
1815
1816 if (starts_with(var, "sparse."))
1817 return git_default_sparse_config(var, value);
1818
1819 /* Add other config variables here and to Documentation/config.adoc. */
1820 return 0;
1821}
1822
1823/*
1824 * All source specific fields in the union, die_on_error, name and the callbacks
1825 * fgetc, ungetc, ftell of top need to be initialized before calling
1826 * this function.
1827 */
1828static int do_config_from(struct config_source *top, config_fn_t fn,
1829 void *data, enum config_scope scope,
1830 const struct config_options *opts)
1831{
1832 struct key_value_info kvi = KVI_INIT;
1833 int ret;
1834
1835 /* push config-file parsing state stack */
1836 top->linenr = 1;
1837 top->eof = 0;
1838 top->total_len = 0;
1839 strbuf_init(&top->value, 1024);
1840 strbuf_init(&top->var, 1024);
1841 kvi_from_source(top, scope, &kvi);
1842
1843 ret = git_parse_source(top, fn, &kvi, data, opts);
1844
1845 strbuf_release(&top->value);
1846 strbuf_release(&top->var);
1847
1848 return ret;
1849}
1850
1851static int do_config_from_file(config_fn_t fn,
1852 const enum config_origin_type origin_type,
1853 const char *name, const char *path, FILE *f,
1854 void *data, enum config_scope scope,
1855 const struct config_options *opts)
1856{
1857 struct config_source top = CONFIG_SOURCE_INIT;
1858 int ret;
1859
1860 top.u.file = f;
1861 top.origin_type = origin_type;
1862 top.name = name;
1863 top.path = path;
1864 top.default_error_action = CONFIG_ERROR_DIE;
1865 top.do_fgetc = config_file_fgetc;
1866 top.do_ungetc = config_file_ungetc;
1867 top.do_ftell = config_file_ftell;
1868
1869 flockfile(f);
1870 ret = do_config_from(&top, fn, data, scope, opts);
1871 funlockfile(f);
1872 return ret;
1873}
1874
1875static int git_config_from_stdin(config_fn_t fn, void *data,
1876 enum config_scope scope)
1877{
1878 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1879 data, scope, NULL);
1880}
1881
1882int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1883 void *data, enum config_scope scope,
1884 const struct config_options *opts)
1885{
1886 int ret = -1;
1887 FILE *f;
1888
1889 if (!filename)
1890 BUG("filename cannot be NULL");
1891 f = fopen_or_warn(filename, "r");
1892 if (f) {
1893 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1894 filename, f, data, scope, opts);
1895 fclose(f);
1896 }
1897 return ret;
1898}
1899
1900int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1901{
1902 return git_config_from_file_with_options(fn, filename, data,
1903 CONFIG_SCOPE_UNKNOWN, NULL);
1904}
1905
1906int git_config_from_mem(config_fn_t fn,
1907 const enum config_origin_type origin_type,
1908 const char *name, const char *buf, size_t len,
1909 void *data, enum config_scope scope,
1910 const struct config_options *opts)
1911{
1912 struct config_source top = CONFIG_SOURCE_INIT;
1913
1914 top.u.buf.buf = buf;
1915 top.u.buf.len = len;
1916 top.u.buf.pos = 0;
1917 top.origin_type = origin_type;
1918 top.name = name;
1919 top.path = NULL;
1920 top.default_error_action = CONFIG_ERROR_ERROR;
1921 top.do_fgetc = config_buf_fgetc;
1922 top.do_ungetc = config_buf_ungetc;
1923 top.do_ftell = config_buf_ftell;
1924
1925 return do_config_from(&top, fn, data, scope, opts);
1926}
1927
1928int git_config_from_blob_oid(config_fn_t fn,
1929 const char *name,
1930 struct repository *repo,
1931 const struct object_id *oid,
1932 void *data,
1933 enum config_scope scope)
1934{
1935 enum object_type type;
1936 char *buf;
1937 unsigned long size;
1938 int ret;
1939
1940 buf = repo_read_object_file(repo, oid, &type, &size);
1941 if (!buf)
1942 return error(_("unable to load config blob object '%s'"), name);
1943 if (type != OBJ_BLOB) {
1944 free(buf);
1945 return error(_("reference '%s' does not point to a blob"), name);
1946 }
1947
1948 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1949 data, scope, NULL);
1950 free(buf);
1951
1952 return ret;
1953}
1954
1955static int git_config_from_blob_ref(config_fn_t fn,
1956 struct repository *repo,
1957 const char *name,
1958 void *data,
1959 enum config_scope scope)
1960{
1961 struct object_id oid;
1962
1963 if (repo_get_oid(repo, name, &oid) < 0)
1964 return error(_("unable to resolve config blob '%s'"), name);
1965 return git_config_from_blob_oid(fn, name, repo, &oid, data, scope);
1966}
1967
1968char *git_system_config(void)
1969{
1970 char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
1971 if (!system_config)
1972 system_config = system_path(ETC_GITCONFIG);
1973 normalize_path_copy(system_config, system_config);
1974 return system_config;
1975}
1976
1977char *git_global_config(void)
1978{
1979 char *user_config, *xdg_config;
1980
1981 git_global_config_paths(&user_config, &xdg_config);
1982 if (!user_config) {
1983 free(xdg_config);
1984 return NULL;
1985 }
1986
1987 if (access_or_warn(user_config, R_OK, 0) && xdg_config &&
1988 !access_or_warn(xdg_config, R_OK, 0)) {
1989 free(user_config);
1990 return xdg_config;
1991 } else {
1992 free(xdg_config);
1993 return user_config;
1994 }
1995}
1996
1997void git_global_config_paths(char **user_out, char **xdg_out)
1998{
1999 char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
2000 char *xdg_config = NULL;
2001
2002 if (!user_config) {
2003 user_config = interpolate_path("~/.gitconfig", 0);
2004 xdg_config = xdg_config_home("config");
2005 }
2006
2007 *user_out = user_config;
2008 *xdg_out = xdg_config;
2009}
2010
2011int git_config_system(void)
2012{
2013 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
2014}
2015
2016static int do_git_config_sequence(const struct config_options *opts,
2017 const struct repository *repo,
2018 config_fn_t fn, void *data)
2019{
2020 int ret = 0;
2021 char *system_config = git_system_config();
2022 char *xdg_config = NULL;
2023 char *user_config = NULL;
2024 char *repo_config;
2025 char *worktree_config;
2026
2027 /*
2028 * Ensure that either:
2029 * - the git_dir and commondir are both set, or
2030 * - the git_dir and commondir are both NULL
2031 */
2032 if (!opts->git_dir != !opts->commondir)
2033 BUG("only one of commondir and git_dir is non-NULL");
2034
2035 if (opts->commondir) {
2036 repo_config = mkpathdup("%s/config", opts->commondir);
2037 worktree_config = mkpathdup("%s/config.worktree", opts->git_dir);
2038 } else {
2039 repo_config = NULL;
2040 worktree_config = NULL;
2041 }
2042
2043 if (git_config_system() && system_config &&
2044 !access_or_die(system_config, R_OK,
2045 opts->system_gently ? ACCESS_EACCES_OK : 0))
2046 ret += git_config_from_file_with_options(fn, system_config,
2047 data, CONFIG_SCOPE_SYSTEM,
2048 NULL);
2049
2050 git_global_config_paths(&user_config, &xdg_config);
2051
2052 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
2053 ret += git_config_from_file_with_options(fn, xdg_config, data,
2054 CONFIG_SCOPE_GLOBAL, NULL);
2055
2056 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
2057 ret += git_config_from_file_with_options(fn, user_config, data,
2058 CONFIG_SCOPE_GLOBAL, NULL);
2059
2060 if (!opts->ignore_repo && repo_config &&
2061 !access_or_die(repo_config, R_OK, 0))
2062 ret += git_config_from_file_with_options(fn, repo_config, data,
2063 CONFIG_SCOPE_LOCAL, NULL);
2064
2065 if (!opts->ignore_worktree && worktree_config &&
2066 repo && repo->repository_format_worktree_config &&
2067 !access_or_die(worktree_config, R_OK, 0)) {
2068 ret += git_config_from_file_with_options(fn, worktree_config, data,
2069 CONFIG_SCOPE_WORKTREE,
2070 NULL);
2071 }
2072
2073 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
2074 die(_("unable to parse command-line config"));
2075
2076 free(system_config);
2077 free(xdg_config);
2078 free(user_config);
2079 free(repo_config);
2080 free(worktree_config);
2081 return ret;
2082}
2083
2084int config_with_options(config_fn_t fn, void *data,
2085 const struct git_config_source *config_source,
2086 struct repository *repo,
2087 const struct config_options *opts)
2088{
2089 struct config_include_data inc = CONFIG_INCLUDE_INIT;
2090 int ret;
2091
2092 if (opts->respect_includes) {
2093 inc.fn = fn;
2094 inc.data = data;
2095 inc.opts = opts;
2096 inc.repo = repo;
2097 inc.config_source = config_source;
2098 fn = git_config_include;
2099 data = &inc;
2100 }
2101
2102 /*
2103 * If we have a specific filename, use it. Otherwise, follow the
2104 * regular lookup sequence.
2105 */
2106 if (config_source && config_source->use_stdin) {
2107 ret = git_config_from_stdin(fn, data, config_source->scope);
2108 } else if (config_source && config_source->file) {
2109 ret = git_config_from_file_with_options(fn, config_source->file,
2110 data, config_source->scope,
2111 NULL);
2112 } else if (config_source && config_source->blob) {
2113 ret = git_config_from_blob_ref(fn, repo, config_source->blob,
2114 data, config_source->scope);
2115 } else {
2116 ret = do_git_config_sequence(opts, repo, fn, data);
2117 }
2118
2119 if (inc.remote_urls) {
2120 string_list_clear(inc.remote_urls, 0);
2121 FREE_AND_NULL(inc.remote_urls);
2122 }
2123 return ret;
2124}
2125
2126static void configset_iter(struct config_set *set, config_fn_t fn, void *data)
2127{
2128 int i, value_index;
2129 struct string_list *values;
2130 struct config_set_element *entry;
2131 struct configset_list *list = &set->list;
2132 struct config_context ctx = CONFIG_CONTEXT_INIT;
2133
2134 for (i = 0; i < list->nr; i++) {
2135 entry = list->items[i].e;
2136 value_index = list->items[i].value_index;
2137 values = &entry->value_list;
2138
2139 ctx.kvi = values->items[value_index].util;
2140 if (fn(entry->key, values->items[value_index].string, &ctx, data) < 0)
2141 git_die_config_linenr(entry->key,
2142 ctx.kvi->filename,
2143 ctx.kvi->linenr);
2144 }
2145}
2146
2147void read_early_config(struct repository *repo, config_fn_t cb, void *data)
2148{
2149 struct config_options opts = {0};
2150 struct strbuf commondir = STRBUF_INIT;
2151 struct strbuf gitdir = STRBUF_INIT;
2152
2153 opts.respect_includes = 1;
2154
2155 if (repo && repo->gitdir) {
2156 opts.commondir = repo_get_common_dir(repo);
2157 opts.git_dir = repo_get_git_dir(repo);
2158 /*
2159 * When setup_git_directory() was not yet asked to discover the
2160 * GIT_DIR, we ask discover_git_directory() to figure out whether there
2161 * is any repository config we should use (but unlike
2162 * setup_git_directory_gently(), no global state is changed, most
2163 * notably, the current working directory is still the same after the
2164 * call).
2165 */
2166 } else if (!discover_git_directory(&commondir, &gitdir)) {
2167 opts.commondir = commondir.buf;
2168 opts.git_dir = gitdir.buf;
2169 }
2170
2171 config_with_options(cb, data, NULL, NULL, &opts);
2172
2173 strbuf_release(&commondir);
2174 strbuf_release(&gitdir);
2175}
2176
2177void read_very_early_config(config_fn_t cb, void *data)
2178{
2179 struct config_options opts = { 0 };
2180
2181 opts.respect_includes = 1;
2182 opts.ignore_repo = 1;
2183 opts.ignore_worktree = 1;
2184 opts.ignore_cmdline = 1;
2185 opts.system_gently = 1;
2186
2187 config_with_options(cb, data, NULL, NULL, &opts);
2188}
2189
2190RESULT_MUST_BE_USED
2191static int configset_find_element(struct config_set *set, const char *key,
2192 struct config_set_element **dest)
2193{
2194 struct config_set_element k;
2195 struct config_set_element *found_entry;
2196 char *normalized_key;
2197 int ret;
2198
2199 /*
2200 * `key` may come from the user, so normalize it before using it
2201 * for querying entries from the hashmap.
2202 */
2203 ret = git_config_parse_key(key, &normalized_key, NULL);
2204 if (ret)
2205 return ret;
2206
2207 hashmap_entry_init(&k.ent, strhash(normalized_key));
2208 k.key = normalized_key;
2209 found_entry = hashmap_get_entry(&set->config_hash, &k, ent, NULL);
2210 free(normalized_key);
2211 *dest = found_entry;
2212 return 0;
2213}
2214
2215static int configset_add_value(const struct key_value_info *kvi_p,
2216 struct config_set *set, const char *key,
2217 const char *value)
2218{
2219 struct config_set_element *e;
2220 struct string_list_item *si;
2221 struct configset_list_item *l_item;
2222 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
2223 int ret;
2224
2225 ret = configset_find_element(set, key, &e);
2226 if (ret)
2227 return ret;
2228 /*
2229 * Since the keys are being fed by git_config*() callback mechanism, they
2230 * are already normalized. So simply add them without any further munging.
2231 */
2232 if (!e) {
2233 e = xmalloc(sizeof(*e));
2234 hashmap_entry_init(&e->ent, strhash(key));
2235 e->key = xstrdup(key);
2236 string_list_init_dup(&e->value_list);
2237 hashmap_add(&set->config_hash, &e->ent);
2238 }
2239 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
2240
2241 ALLOC_GROW(set->list.items, set->list.nr + 1, set->list.alloc);
2242 l_item = &set->list.items[set->list.nr++];
2243 l_item->e = e;
2244 l_item->value_index = e->value_list.nr - 1;
2245
2246 *kv_info = *kvi_p;
2247 si->util = kv_info;
2248
2249 return 0;
2250}
2251
2252static int config_set_element_cmp(const void *cmp_data UNUSED,
2253 const struct hashmap_entry *eptr,
2254 const struct hashmap_entry *entry_or_key,
2255 const void *keydata UNUSED)
2256{
2257 const struct config_set_element *e1, *e2;
2258
2259 e1 = container_of(eptr, const struct config_set_element, ent);
2260 e2 = container_of(entry_or_key, const struct config_set_element, ent);
2261
2262 return strcmp(e1->key, e2->key);
2263}
2264
2265void git_configset_init(struct config_set *set)
2266{
2267 hashmap_init(&set->config_hash, config_set_element_cmp, NULL, 0);
2268 set->hash_initialized = 1;
2269 set->list.nr = 0;
2270 set->list.alloc = 0;
2271 set->list.items = NULL;
2272}
2273
2274void git_configset_clear(struct config_set *set)
2275{
2276 struct config_set_element *entry;
2277 struct hashmap_iter iter;
2278 if (!set->hash_initialized)
2279 return;
2280
2281 hashmap_for_each_entry(&set->config_hash, &iter, entry,
2282 ent /* member name */) {
2283 free(entry->key);
2284 string_list_clear(&entry->value_list, 1);
2285 }
2286 hashmap_clear_and_free(&set->config_hash, struct config_set_element, ent);
2287 set->hash_initialized = 0;
2288 free(set->list.items);
2289 set->list.nr = 0;
2290 set->list.alloc = 0;
2291 set->list.items = NULL;
2292}
2293
2294static int config_set_callback(const char *key, const char *value,
2295 const struct config_context *ctx,
2296 void *cb)
2297{
2298 struct config_set *set = cb;
2299 configset_add_value(ctx->kvi, set, key, value);
2300 return 0;
2301}
2302
2303int git_configset_add_file(struct config_set *set, const char *filename)
2304{
2305 return git_config_from_file(config_set_callback, filename, set);
2306}
2307
2308int git_configset_get_value(struct config_set *set, const char *key,
2309 const char **value, struct key_value_info *kvi)
2310{
2311 const struct string_list *values = NULL;
2312 int ret;
2313 struct string_list_item item;
2314 /*
2315 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
2316 * queried key in the files of the configset, the value returned will be the last
2317 * value in the value list for that key.
2318 */
2319 if ((ret = git_configset_get_value_multi(set, key, &values)))
2320 return ret;
2321
2322 assert(values->nr > 0);
2323 item = values->items[values->nr - 1];
2324 *value = item.string;
2325 if (kvi)
2326 *kvi = *((struct key_value_info *)item.util);
2327 return 0;
2328}
2329
2330int git_configset_get_value_multi(struct config_set *set, const char *key,
2331 const struct string_list **dest)
2332{
2333 struct config_set_element *e;
2334 int ret;
2335
2336 if ((ret = configset_find_element(set, key, &e)))
2337 return ret;
2338 else if (!e)
2339 return 1;
2340 *dest = &e->value_list;
2341
2342 return 0;
2343}
2344
2345static int check_multi_string(struct string_list_item *item, void *util)
2346{
2347 return item->string ? 0 : config_error_nonbool(util);
2348}
2349
2350int git_configset_get_string_multi(struct config_set *cs, const char *key,
2351 const struct string_list **dest)
2352{
2353 int ret;
2354
2355 if ((ret = git_configset_get_value_multi(cs, key, dest)))
2356 return ret;
2357 if ((ret = for_each_string_list((struct string_list *)*dest,
2358 check_multi_string, (void *)key)))
2359 return ret;
2360
2361 return 0;
2362}
2363
2364int git_configset_get(struct config_set *set, const char *key)
2365{
2366 struct config_set_element *e;
2367 int ret;
2368
2369 if ((ret = configset_find_element(set, key, &e)))
2370 return ret;
2371 else if (!e)
2372 return 1;
2373 return 0;
2374}
2375
2376int git_configset_get_string(struct config_set *set, const char *key, char **dest)
2377{
2378 const char *value;
2379 if (!git_configset_get_value(set, key, &value, NULL))
2380 return git_config_string(dest, key, value);
2381 else
2382 return 1;
2383}
2384
2385static int git_configset_get_string_tmp(struct config_set *set, const char *key,
2386 const char **dest)
2387{
2388 const char *value;
2389 if (!git_configset_get_value(set, key, &value, NULL)) {
2390 if (!value)
2391 return config_error_nonbool(key);
2392 *dest = value;
2393 return 0;
2394 } else {
2395 return 1;
2396 }
2397}
2398
2399int git_configset_get_int(struct config_set *set, const char *key, int *dest)
2400{
2401 const char *value;
2402 struct key_value_info kvi;
2403
2404 if (!git_configset_get_value(set, key, &value, &kvi)) {
2405 *dest = git_config_int(key, value, &kvi);
2406 return 0;
2407 } else
2408 return 1;
2409}
2410
2411int git_configset_get_ulong(struct config_set *set, const char *key, unsigned long *dest)
2412{
2413 const char *value;
2414 struct key_value_info kvi;
2415
2416 if (!git_configset_get_value(set, key, &value, &kvi)) {
2417 *dest = git_config_ulong(key, value, &kvi);
2418 return 0;
2419 } else
2420 return 1;
2421}
2422
2423int git_configset_get_bool(struct config_set *set, const char *key, int *dest)
2424{
2425 const char *value;
2426 if (!git_configset_get_value(set, key, &value, NULL)) {
2427 *dest = git_config_bool(key, value);
2428 return 0;
2429 } else
2430 return 1;
2431}
2432
2433int git_configset_get_bool_or_int(struct config_set *set, const char *key,
2434 int *is_bool, int *dest)
2435{
2436 const char *value;
2437 struct key_value_info kvi;
2438
2439 if (!git_configset_get_value(set, key, &value, &kvi)) {
2440 *dest = git_config_bool_or_int(key, value, &kvi, is_bool);
2441 return 0;
2442 } else
2443 return 1;
2444}
2445
2446int git_configset_get_maybe_bool(struct config_set *set, const char *key, int *dest)
2447{
2448 const char *value;
2449 if (!git_configset_get_value(set, key, &value, NULL)) {
2450 *dest = git_parse_maybe_bool(value);
2451 if (*dest == -1)
2452 return -1;
2453 return 0;
2454 } else
2455 return 1;
2456}
2457
2458int git_configset_get_pathname(struct config_set *set, const char *key, char **dest)
2459{
2460 const char *value;
2461 if (!git_configset_get_value(set, key, &value, NULL))
2462 return git_config_pathname(dest, key, value);
2463 else
2464 return 1;
2465}
2466
2467/* Functions use to read configuration from a repository */
2468static void repo_read_config(struct repository *repo)
2469{
2470 struct config_options opts = { 0 };
2471
2472 opts.respect_includes = 1;
2473 opts.commondir = repo->commondir;
2474 opts.git_dir = repo->gitdir;
2475
2476 if (!repo->config)
2477 CALLOC_ARRAY(repo->config, 1);
2478 else
2479 git_configset_clear(repo->config);
2480
2481 git_configset_init(repo->config);
2482 if (config_with_options(config_set_callback, repo->config, NULL,
2483 repo, &opts) < 0)
2484 /*
2485 * config_with_options() normally returns only
2486 * zero, as most errors are fatal, and
2487 * non-fatal potential errors are guarded by "if"
2488 * statements that are entered only when no error is
2489 * possible.
2490 *
2491 * If we ever encounter a non-fatal error, it means
2492 * something went really wrong and we should stop
2493 * immediately.
2494 */
2495 die(_("unknown error occurred while reading the configuration files"));
2496}
2497
2498static void git_config_check_init(struct repository *repo)
2499{
2500 if (repo->config && repo->config->hash_initialized)
2501 return;
2502 repo_read_config(repo);
2503}
2504
2505void repo_config_clear(struct repository *repo)
2506{
2507 if (!repo->config || !repo->config->hash_initialized)
2508 return;
2509 git_configset_clear(repo->config);
2510}
2511
2512void repo_config(struct repository *repo, config_fn_t fn, void *data)
2513{
2514 if (!repo) {
2515 read_very_early_config(fn, data);
2516 return;
2517 }
2518 git_config_check_init(repo);
2519 configset_iter(repo->config, fn, data);
2520}
2521
2522int repo_config_get(struct repository *repo, const char *key)
2523{
2524 git_config_check_init(repo);
2525 return git_configset_get(repo->config, key);
2526}
2527
2528int repo_config_get_value(struct repository *repo,
2529 const char *key, const char **value)
2530{
2531 git_config_check_init(repo);
2532 return git_configset_get_value(repo->config, key, value, NULL);
2533}
2534
2535int repo_config_get_value_multi(struct repository *repo, const char *key,
2536 const struct string_list **dest)
2537{
2538 git_config_check_init(repo);
2539 return git_configset_get_value_multi(repo->config, key, dest);
2540}
2541
2542int repo_config_get_string_multi(struct repository *repo, const char *key,
2543 const struct string_list **dest)
2544{
2545 git_config_check_init(repo);
2546 return git_configset_get_string_multi(repo->config, key, dest);
2547}
2548
2549int repo_config_get_string(struct repository *repo,
2550 const char *key, char **dest)
2551{
2552 int ret;
2553 git_config_check_init(repo);
2554 ret = git_configset_get_string(repo->config, key, dest);
2555 if (ret < 0)
2556 git_die_config(repo, key, NULL);
2557 return ret;
2558}
2559
2560int repo_config_get_string_tmp(struct repository *repo,
2561 const char *key, const char **dest)
2562{
2563 int ret;
2564 git_config_check_init(repo);
2565 ret = git_configset_get_string_tmp(repo->config, key, dest);
2566 if (ret < 0)
2567 git_die_config(repo, key, NULL);
2568 return ret;
2569}
2570
2571int repo_config_get_int(struct repository *repo,
2572 const char *key, int *dest)
2573{
2574 git_config_check_init(repo);
2575 return git_configset_get_int(repo->config, key, dest);
2576}
2577
2578int repo_config_get_ulong(struct repository *repo,
2579 const char *key, unsigned long *dest)
2580{
2581 git_config_check_init(repo);
2582 return git_configset_get_ulong(repo->config, key, dest);
2583}
2584
2585int repo_config_get_bool(struct repository *repo,
2586 const char *key, int *dest)
2587{
2588 git_config_check_init(repo);
2589 return git_configset_get_bool(repo->config, key, dest);
2590}
2591
2592int repo_config_get_bool_or_int(struct repository *repo,
2593 const char *key, int *is_bool, int *dest)
2594{
2595 git_config_check_init(repo);
2596 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2597}
2598
2599int repo_config_get_maybe_bool(struct repository *repo,
2600 const char *key, int *dest)
2601{
2602 git_config_check_init(repo);
2603 return git_configset_get_maybe_bool(repo->config, key, dest);
2604}
2605
2606int repo_config_get_pathname(struct repository *repo,
2607 const char *key, char **dest)
2608{
2609 int ret;
2610 git_config_check_init(repo);
2611 ret = git_configset_get_pathname(repo->config, key, dest);
2612 if (ret < 0)
2613 git_die_config(repo, key, NULL);
2614 return ret;
2615}
2616
2617/* Read values into protected_config. */
2618static void read_protected_config(void)
2619{
2620 struct config_options opts = {
2621 .respect_includes = 1,
2622 .ignore_repo = 1,
2623 .ignore_worktree = 1,
2624 .system_gently = 1,
2625 };
2626
2627 git_configset_init(&protected_config);
2628 config_with_options(config_set_callback, &protected_config, NULL,
2629 NULL, &opts);
2630}
2631
2632void git_protected_config(config_fn_t fn, void *data)
2633{
2634 if (!protected_config.hash_initialized)
2635 read_protected_config();
2636 configset_iter(&protected_config, fn, data);
2637}
2638
2639int repo_config_get_expiry(struct repository *r, const char *key, char **output)
2640{
2641 int ret = repo_config_get_string(r, key, output);
2642
2643 if (ret)
2644 return ret;
2645 if (strcmp(*output, "now")) {
2646 timestamp_t now = approxidate("now");
2647 if (approxidate(*output) >= now)
2648 git_die_config(r, key, _("Invalid %s: '%s'"), key, *output);
2649 }
2650 return ret;
2651}
2652
2653int repo_config_get_expiry_in_days(struct repository *r, const char *key,
2654 timestamp_t *expiry, timestamp_t now)
2655{
2656 const char *expiry_string;
2657 intmax_t days;
2658 timestamp_t when;
2659
2660 if (repo_config_get_string_tmp(r, key, &expiry_string))
2661 return 1; /* no such thing */
2662
2663 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2664 const int scale = 86400;
2665 *expiry = now - days * scale;
2666 return 0;
2667 }
2668
2669 if (!parse_expiry_date(expiry_string, &when)) {
2670 *expiry = when;
2671 return 0;
2672 }
2673 return -1; /* thing exists but cannot be parsed */
2674}
2675
2676int repo_config_get_split_index(struct repository *r)
2677{
2678 int val;
2679
2680 if (!repo_config_get_maybe_bool(r, "core.splitindex", &val))
2681 return val;
2682
2683 return -1; /* default value */
2684}
2685
2686int repo_config_get_max_percent_split_change(struct repository *r)
2687{
2688 int val = -1;
2689
2690 if (!repo_config_get_int(r, "splitindex.maxpercentchange", &val)) {
2691 if (0 <= val && val <= 100)
2692 return val;
2693
2694 return error(_("splitIndex.maxPercentChange value '%d' "
2695 "should be between 0 and 100"), val);
2696 }
2697
2698 return -1; /* default value */
2699}
2700
2701int repo_config_get_index_threads(struct repository *r, int *dest)
2702{
2703 int is_bool, val;
2704
2705 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2706 if (val) {
2707 *dest = val;
2708 return 0;
2709 }
2710
2711 if (!repo_config_get_bool_or_int(r, "index.threads", &is_bool, &val)) {
2712 if (is_bool)
2713 *dest = val ? 0 : 1;
2714 else
2715 *dest = val;
2716 return 0;
2717 }
2718
2719 return 1;
2720}
2721
2722NORETURN
2723void git_die_config_linenr(const char *key, const char *filename, int linenr)
2724{
2725 if (!filename)
2726 die(_("unable to parse '%s' from command-line config"), key);
2727 else
2728 die(_("bad config variable '%s' in file '%s' at line %d"),
2729 key, filename, linenr);
2730}
2731
2732void git_die_config(struct repository *r, const char *key, const char *err, ...)
2733{
2734 const struct string_list *values;
2735 struct key_value_info *kv_info;
2736 report_fn error_fn = get_error_routine();
2737
2738 if (err) {
2739 va_list params;
2740 va_start(params, err);
2741 error_fn(err, params);
2742 va_end(params);
2743 }
2744 if (repo_config_get_value_multi(r, key, &values))
2745 BUG("for key '%s' we must have a value to report on", key);
2746 kv_info = values->items[values->nr - 1].util;
2747 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2748}
2749
2750/*
2751 * Find all the stuff for git_config_set() below.
2752 */
2753
2754struct config_store_data {
2755 size_t baselen;
2756 char *key;
2757 int do_not_match;
2758 const char *fixed_value;
2759 regex_t *value_pattern;
2760 int multi_replace;
2761 struct {
2762 size_t begin, end;
2763 enum config_event_t type;
2764 int is_keys_section;
2765 } *parsed;
2766 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2767 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2768};
2769#define CONFIG_STORE_INIT { 0 }
2770
2771static void config_store_data_clear(struct config_store_data *store)
2772{
2773 free(store->key);
2774 if (store->value_pattern != NULL &&
2775 store->value_pattern != CONFIG_REGEX_NONE) {
2776 regfree(store->value_pattern);
2777 free(store->value_pattern);
2778 }
2779 free(store->parsed);
2780 free(store->seen);
2781 memset(store, 0, sizeof(*store));
2782}
2783
2784static int matches(const char *key, const char *value,
2785 const struct config_store_data *store)
2786{
2787 if (strcmp(key, store->key))
2788 return 0; /* not ours */
2789 if (store->fixed_value && value)
2790 return !strcmp(store->fixed_value, value);
2791 if (!store->value_pattern)
2792 return 1; /* always matches */
2793 if (store->value_pattern == CONFIG_REGEX_NONE)
2794 return 0; /* never matches */
2795
2796 return store->do_not_match ^
2797 (value && !regexec(store->value_pattern, value, 0, NULL, 0));
2798}
2799
2800static int store_aux_event(enum config_event_t type, size_t begin, size_t end,
2801 struct config_source *cs, void *data)
2802{
2803 struct config_store_data *store = data;
2804
2805 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2806 store->parsed[store->parsed_nr].begin = begin;
2807 store->parsed[store->parsed_nr].end = end;
2808 store->parsed[store->parsed_nr].type = type;
2809
2810 if (type == CONFIG_EVENT_SECTION) {
2811 int (*cmpfn)(const char *, const char *, size_t);
2812
2813 if (cs->var.len < 2 || cs->var.buf[cs->var.len - 1] != '.')
2814 return error(_("invalid section name '%s'"), cs->var.buf);
2815
2816 if (cs->subsection_case_sensitive)
2817 cmpfn = strncasecmp;
2818 else
2819 cmpfn = strncmp;
2820
2821 /* Is this the section we were looking for? */
2822 store->is_keys_section =
2823 store->parsed[store->parsed_nr].is_keys_section =
2824 cs->var.len - 1 == store->baselen &&
2825 !cmpfn(cs->var.buf, store->key, store->baselen);
2826 if (store->is_keys_section) {
2827 store->section_seen = 1;
2828 ALLOC_GROW(store->seen, store->seen_nr + 1,
2829 store->seen_alloc);
2830 store->seen[store->seen_nr] = store->parsed_nr;
2831 }
2832 }
2833
2834 store->parsed_nr++;
2835
2836 return 0;
2837}
2838
2839static int store_aux(const char *key, const char *value,
2840 const struct config_context *ctx UNUSED, void *cb)
2841{
2842 struct config_store_data *store = cb;
2843
2844 if (store->key_seen) {
2845 if (matches(key, value, store)) {
2846 if (store->seen_nr == 1 && store->multi_replace == 0) {
2847 warning(_("%s has multiple values"), key);
2848 }
2849
2850 ALLOC_GROW(store->seen, store->seen_nr + 1,
2851 store->seen_alloc);
2852
2853 store->seen[store->seen_nr] = store->parsed_nr;
2854 store->seen_nr++;
2855 }
2856 } else if (store->is_keys_section) {
2857 /*
2858 * Do not increment matches yet: this may not be a match, but we
2859 * are in the desired section.
2860 */
2861 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2862 store->seen[store->seen_nr] = store->parsed_nr;
2863 store->section_seen = 1;
2864
2865 if (matches(key, value, store)) {
2866 store->seen_nr++;
2867 store->key_seen = 1;
2868 }
2869 }
2870
2871 return 0;
2872}
2873
2874static int write_error(const char *filename)
2875{
2876 error(_("failed to write new configuration file %s"), filename);
2877
2878 /* Same error code as "failed to rename". */
2879 return 4;
2880}
2881
2882static struct strbuf store_create_section(const char *key,
2883 const struct config_store_data *store)
2884{
2885 const char *dot;
2886 size_t i;
2887 struct strbuf sb = STRBUF_INIT;
2888
2889 dot = memchr(key, '.', store->baselen);
2890 if (dot) {
2891 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2892 for (i = dot - key + 1; i < store->baselen; i++) {
2893 if (key[i] == '"' || key[i] == '\\')
2894 strbuf_addch(&sb, '\\');
2895 strbuf_addch(&sb, key[i]);
2896 }
2897 strbuf_addstr(&sb, "\"]\n");
2898 } else {
2899 strbuf_addch(&sb, '[');
2900 strbuf_add(&sb, key, store->baselen);
2901 strbuf_addstr(&sb, "]\n");
2902 }
2903
2904 return sb;
2905}
2906
2907static ssize_t write_section(int fd, const char *key,
2908 const struct config_store_data *store)
2909{
2910 struct strbuf sb = store_create_section(key, store);
2911 ssize_t ret;
2912
2913 ret = write_in_full(fd, sb.buf, sb.len);
2914 strbuf_release(&sb);
2915
2916 return ret;
2917}
2918
2919static ssize_t write_pair(int fd, const char *key, const char *value,
2920 const char *comment,
2921 const struct config_store_data *store)
2922{
2923 int i;
2924 ssize_t ret;
2925 const char *quote = "";
2926 struct strbuf sb = STRBUF_INIT;
2927
2928 /*
2929 * Check to see if the value needs to be surrounded with a dq pair.
2930 * Note that problematic characters are always backslash-quoted; this
2931 * check is about not losing leading or trailing SP and strings that
2932 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2933 * configuration parser.
2934 */
2935 if (value[0] == ' ')
2936 quote = "\"";
2937 for (i = 0; value[i]; i++)
2938 if (value[i] == ';' || value[i] == '#')
2939 quote = "\"";
2940 if (i && value[i - 1] == ' ')
2941 quote = "\"";
2942
2943 strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
2944
2945 for (i = 0; value[i]; i++)
2946 switch (value[i]) {
2947 case '\n':
2948 strbuf_addstr(&sb, "\\n");
2949 break;
2950 case '\t':
2951 strbuf_addstr(&sb, "\\t");
2952 break;
2953 case '"':
2954 case '\\':
2955 strbuf_addch(&sb, '\\');
2956 /* fallthrough */
2957 default:
2958 strbuf_addch(&sb, value[i]);
2959 break;
2960 }
2961
2962 if (comment)
2963 strbuf_addf(&sb, "%s%s\n", quote, comment);
2964 else
2965 strbuf_addf(&sb, "%s\n", quote);
2966
2967 ret = write_in_full(fd, sb.buf, sb.len);
2968 strbuf_release(&sb);
2969
2970 return ret;
2971}
2972
2973/*
2974 * If we are about to unset the last key(s) in a section, and if there are
2975 * no comments surrounding (or included in) the section, we will want to
2976 * extend begin/end to remove the entire section.
2977 *
2978 * Note: the parameter `seen_ptr` points to the index into the store.seen
2979 * array. * This index may be incremented if a section has more than one
2980 * entry (which all are to be removed).
2981 */
2982static void maybe_remove_section(struct config_store_data *store,
2983 size_t *begin_offset, size_t *end_offset,
2984 int *seen_ptr)
2985{
2986 size_t begin;
2987 int i, seen, section_seen = 0;
2988
2989 /*
2990 * First, ensure that this is the first key, and that there are no
2991 * comments before the entry nor before the section header.
2992 */
2993 seen = *seen_ptr;
2994 for (i = store->seen[seen]; i > 0; i--) {
2995 enum config_event_t type = store->parsed[i - 1].type;
2996
2997 if (type == CONFIG_EVENT_COMMENT)
2998 /* There is a comment before this entry or section */
2999 return;
3000 if (type == CONFIG_EVENT_ENTRY) {
3001 if (!section_seen)
3002 /* This is not the section's first entry. */
3003 return;
3004 /* We encountered no comment before the section. */
3005 break;
3006 }
3007 if (type == CONFIG_EVENT_SECTION) {
3008 if (!store->parsed[i - 1].is_keys_section)
3009 break;
3010 section_seen = 1;
3011 }
3012 }
3013 begin = store->parsed[i].begin;
3014
3015 /*
3016 * Next, make sure that we are removing the last key(s) in the section,
3017 * and that there are no comments that are possibly about the current
3018 * section.
3019 */
3020 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
3021 enum config_event_t type = store->parsed[i].type;
3022
3023 if (type == CONFIG_EVENT_COMMENT)
3024 return;
3025 if (type == CONFIG_EVENT_SECTION) {
3026 if (store->parsed[i].is_keys_section)
3027 continue;
3028 break;
3029 }
3030 if (type == CONFIG_EVENT_ENTRY) {
3031 if (++seen < store->seen_nr &&
3032 i == store->seen[seen])
3033 /* We want to remove this entry, too */
3034 continue;
3035 /* There is another entry in this section. */
3036 return;
3037 }
3038 }
3039
3040 /*
3041 * We are really removing the last entry/entries from this section, and
3042 * there are no enclosed or surrounding comments. Remove the entire,
3043 * now-empty section.
3044 */
3045 *seen_ptr = seen;
3046 *begin_offset = begin;
3047 if (i < store->parsed_nr)
3048 *end_offset = store->parsed[i].begin;
3049 else
3050 *end_offset = store->parsed[store->parsed_nr - 1].end;
3051}
3052
3053int repo_config_set_in_file_gently(struct repository *r, const char *config_filename,
3054 const char *key, const char *comment, const char *value)
3055{
3056 return repo_config_set_multivar_in_file_gently(r, config_filename, key, value, NULL, comment, 0);
3057}
3058
3059void repo_config_set_in_file(struct repository *r, const char *config_filename,
3060 const char *key, const char *value)
3061{
3062 repo_config_set_multivar_in_file(r, config_filename, key, value, NULL, 0);
3063}
3064
3065int repo_config_set_gently(struct repository *r, const char *key, const char *value)
3066{
3067 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3068}
3069
3070int repo_config_set_worktree_gently(struct repository *r,
3071 const char *key, const char *value)
3072{
3073 /* Only use worktree-specific config if it is already enabled. */
3074 if (r->repository_format_worktree_config) {
3075 char *file = repo_git_path(r, "config.worktree");
3076 int ret = repo_config_set_multivar_in_file_gently(
3077 r, file, key, value, NULL, NULL, 0);
3078 free(file);
3079 return ret;
3080 }
3081 return repo_config_set_multivar_gently(r, key, value, NULL, 0);
3082}
3083
3084void repo_config_set(struct repository *r, const char *key, const char *value)
3085{
3086 repo_config_set_multivar(r, key, value, NULL, 0);
3087
3088 trace2_cmd_set_config(key, value);
3089}
3090
3091char *git_config_prepare_comment_string(const char *comment)
3092{
3093 size_t leading_blanks;
3094 char *prepared;
3095
3096 if (!comment)
3097 return NULL;
3098
3099 if (strchr(comment, '\n'))
3100 die(_("no multi-line comment allowed: '%s'"), comment);
3101
3102 /*
3103 * If it begins with one or more leading whitespace characters
3104 * followed by '#", the comment string is used as-is.
3105 *
3106 * If it begins with '#', a SP is inserted between the comment
3107 * and the value the comment is about.
3108 *
3109 * Otherwise, the value is followed by a SP followed by '#'
3110 * followed by SP and then the comment string comes.
3111 */
3112
3113 leading_blanks = strspn(comment, " \t");
3114 if (leading_blanks && comment[leading_blanks] == '#')
3115 prepared = xstrdup(comment); /* use it as-is */
3116 else if (comment[0] == '#')
3117 prepared = xstrfmt(" %s", comment);
3118 else
3119 prepared = xstrfmt(" # %s", comment);
3120
3121 return prepared;
3122}
3123
3124static void validate_comment_string(const char *comment)
3125{
3126 size_t leading_blanks;
3127
3128 if (!comment)
3129 return;
3130 /*
3131 * The front-end must have massaged the comment string
3132 * properly before calling us.
3133 */
3134 if (strchr(comment, '\n'))
3135 BUG("multi-line comments are not permitted: '%s'", comment);
3136
3137 leading_blanks = strspn(comment, " \t");
3138 if (!leading_blanks || comment[leading_blanks] != '#')
3139 BUG("comment must begin with one or more SP followed by '#': '%s'",
3140 comment);
3141}
3142
3143/*
3144 * If value==NULL, unset in (remove from) config,
3145 * if value_pattern!=NULL, disregard key/value pairs where value does not match.
3146 * if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
3147 * (only add a new one)
3148 * if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
3149 * key/values are removed before a single new pair is written. If the
3150 * flag is not present, then replace only the first match.
3151 *
3152 * Returns 0 on success.
3153 *
3154 * This function does this:
3155 *
3156 * - it locks the config file by creating ".git/config.lock"
3157 *
3158 * - it then parses the config using store_aux() as validator to find
3159 * the position on the key/value pair to replace. If it is to be unset,
3160 * it must be found exactly once.
3161 *
3162 * - the config file is mmap()ed and the part before the match (if any) is
3163 * written to the lock file, then the changed part and the rest.
3164 *
3165 * - the config file is removed and the lock file rename()d to it.
3166 *
3167 */
3168int repo_config_set_multivar_in_file_gently(struct repository *r,
3169 const char *config_filename,
3170 const char *key, const char *value,
3171 const char *value_pattern,
3172 const char *comment,
3173 unsigned flags)
3174{
3175 int fd = -1, in_fd = -1;
3176 int ret;
3177 struct lock_file lock = LOCK_INIT;
3178 char *filename_buf = NULL;
3179 char *contents = NULL;
3180 size_t contents_sz;
3181 struct config_store_data store = CONFIG_STORE_INIT;
3182
3183 validate_comment_string(comment);
3184
3185 /* parse-key returns negative; flip the sign to feed exit(3) */
3186 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
3187 if (ret)
3188 goto out_free;
3189
3190 store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
3191
3192 if (!config_filename)
3193 config_filename = filename_buf = repo_git_path(r, "config");
3194
3195 /*
3196 * The lock serves a purpose in addition to locking: the new
3197 * contents of .git/config will be written into it.
3198 */
3199 fd = hold_lock_file_for_update(&lock, config_filename, 0);
3200 if (fd < 0) {
3201 error_errno(_("could not lock config file %s"), config_filename);
3202 ret = CONFIG_NO_LOCK;
3203 goto out_free;
3204 }
3205
3206 /*
3207 * If .git/config does not exist yet, write a minimal version.
3208 */
3209 in_fd = open(config_filename, O_RDONLY);
3210 if ( in_fd < 0 ) {
3211 if ( ENOENT != errno ) {
3212 error_errno(_("opening %s"), config_filename);
3213 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
3214 goto out_free;
3215 }
3216 /* if nothing to unset, error out */
3217 if (!value) {
3218 ret = CONFIG_NOTHING_SET;
3219 goto out_free;
3220 }
3221
3222 free(store.key);
3223 store.key = xstrdup(key);
3224 if (write_section(fd, key, &store) < 0 ||
3225 write_pair(fd, key, value, comment, &store) < 0)
3226 goto write_err_out;
3227 } else {
3228 struct stat st;
3229 size_t copy_begin, copy_end;
3230 int i, new_line = 0;
3231 struct config_options opts;
3232
3233 if (!value_pattern)
3234 store.value_pattern = NULL;
3235 else if (value_pattern == CONFIG_REGEX_NONE)
3236 store.value_pattern = CONFIG_REGEX_NONE;
3237 else if (flags & CONFIG_FLAGS_FIXED_VALUE)
3238 store.fixed_value = value_pattern;
3239 else {
3240 if (value_pattern[0] == '!') {
3241 store.do_not_match = 1;
3242 value_pattern++;
3243 } else
3244 store.do_not_match = 0;
3245
3246 store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
3247 if (regcomp(store.value_pattern, value_pattern,
3248 REG_EXTENDED)) {
3249 error(_("invalid pattern: %s"), value_pattern);
3250 FREE_AND_NULL(store.value_pattern);
3251 ret = CONFIG_INVALID_PATTERN;
3252 goto out_free;
3253 }
3254 }
3255
3256 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
3257 store.parsed[0].end = 0;
3258
3259 memset(&opts, 0, sizeof(opts));
3260 opts.event_fn = store_aux_event;
3261 opts.event_fn_data = &store;
3262
3263 /*
3264 * After this, store.parsed will contain offsets of all the
3265 * parsed elements, and store.seen will contain a list of
3266 * matches, as indices into store.parsed.
3267 *
3268 * As a side effect, we make sure to transform only a valid
3269 * existing config file.
3270 */
3271 if (git_config_from_file_with_options(store_aux,
3272 config_filename,
3273 &store, CONFIG_SCOPE_UNKNOWN,
3274 &opts)) {
3275 error(_("invalid config file %s"), config_filename);
3276 ret = CONFIG_INVALID_FILE;
3277 goto out_free;
3278 }
3279
3280 /* if nothing to unset, or too many matches, error out */
3281 if ((store.seen_nr == 0 && value == NULL) ||
3282 (store.seen_nr > 1 && !store.multi_replace)) {
3283 ret = CONFIG_NOTHING_SET;
3284 goto out_free;
3285 }
3286
3287 if (fstat(in_fd, &st) == -1) {
3288 error_errno(_("fstat on %s failed"), config_filename);
3289 ret = CONFIG_INVALID_FILE;
3290 goto out_free;
3291 }
3292
3293 contents_sz = xsize_t(st.st_size);
3294 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
3295 MAP_PRIVATE, in_fd, 0);
3296 if (contents == MAP_FAILED) {
3297 if (errno == ENODEV && S_ISDIR(st.st_mode))
3298 errno = EISDIR;
3299 error_errno(_("unable to mmap '%s'%s"),
3300 config_filename, mmap_os_err());
3301 ret = CONFIG_INVALID_FILE;
3302 contents = NULL;
3303 goto out_free;
3304 }
3305 close(in_fd);
3306 in_fd = -1;
3307
3308 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3309 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
3310 ret = CONFIG_NO_WRITE;
3311 goto out_free;
3312 }
3313
3314 if (store.seen_nr == 0) {
3315 if (!store.seen_alloc) {
3316 /* Did not see key nor section */
3317 ALLOC_GROW(store.seen, 1, store.seen_alloc);
3318 store.seen[0] = store.parsed_nr
3319 - !!store.parsed_nr;
3320 }
3321 store.seen_nr = 1;
3322 }
3323
3324 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
3325 size_t replace_end;
3326 int j = store.seen[i];
3327
3328 new_line = 0;
3329 if (!store.key_seen) {
3330 copy_end = store.parsed[j].end;
3331 /* include '\n' when copying section header */
3332 if (copy_end > 0 && copy_end < contents_sz &&
3333 contents[copy_end - 1] != '\n' &&
3334 contents[copy_end] == '\n')
3335 copy_end++;
3336 replace_end = copy_end;
3337 } else {
3338 replace_end = store.parsed[j].end;
3339 copy_end = store.parsed[j].begin;
3340 if (!value)
3341 maybe_remove_section(&store,
3342 &copy_end,
3343 &replace_end, &i);
3344 /*
3345 * Swallow preceding white-space on the same
3346 * line.
3347 */
3348 while (copy_end > 0 ) {
3349 char c = contents[copy_end - 1];
3350
3351 if (isspace(c) && c != '\n')
3352 copy_end--;
3353 else
3354 break;
3355 }
3356 }
3357
3358 if (copy_end > 0 && contents[copy_end-1] != '\n')
3359 new_line = 1;
3360
3361 /* write the first part of the config */
3362 if (copy_end > copy_begin) {
3363 if (write_in_full(fd, contents + copy_begin,
3364 copy_end - copy_begin) < 0)
3365 goto write_err_out;
3366 if (new_line &&
3367 write_str_in_full(fd, "\n") < 0)
3368 goto write_err_out;
3369 }
3370 copy_begin = replace_end;
3371 }
3372
3373 /* write the pair (value == NULL means unset) */
3374 if (value) {
3375 if (!store.section_seen) {
3376 if (write_section(fd, key, &store) < 0)
3377 goto write_err_out;
3378 }
3379 if (write_pair(fd, key, value, comment, &store) < 0)
3380 goto write_err_out;
3381 }
3382
3383 /* write the rest of the config */
3384 if (copy_begin < contents_sz)
3385 if (write_in_full(fd, contents + copy_begin,
3386 contents_sz - copy_begin) < 0)
3387 goto write_err_out;
3388
3389 munmap(contents, contents_sz);
3390 contents = NULL;
3391 }
3392
3393 if (commit_lock_file(&lock) < 0) {
3394 error_errno(_("could not write config file %s"), config_filename);
3395 ret = CONFIG_NO_WRITE;
3396 goto out_free;
3397 }
3398
3399 ret = 0;
3400
3401 /* Invalidate the config cache */
3402 repo_config_clear(r);
3403
3404out_free:
3405 rollback_lock_file(&lock);
3406 free(filename_buf);
3407 if (contents)
3408 munmap(contents, contents_sz);
3409 if (in_fd >= 0)
3410 close(in_fd);
3411 config_store_data_clear(&store);
3412 return ret;
3413
3414write_err_out:
3415 ret = write_error(get_lock_file_path(&lock));
3416 goto out_free;
3417}
3418
3419void repo_config_set_multivar_in_file(struct repository *r,
3420 const char *config_filename,
3421 const char *key, const char *value,
3422 const char *value_pattern, unsigned flags)
3423{
3424 if (!repo_config_set_multivar_in_file_gently(r, config_filename, key, value,
3425 value_pattern, NULL, flags))
3426 return;
3427 if (value)
3428 die(_("could not set '%s' to '%s'"), key, value);
3429 else
3430 die(_("could not unset '%s'"), key);
3431}
3432
3433int repo_config_set_multivar_gently(struct repository *r, const char *key,
3434 const char *value,
3435 const char *value_pattern, unsigned flags)
3436{
3437 char *file = repo_git_path(r, "config");
3438 int res = repo_config_set_multivar_in_file_gently(r, file,
3439 key, value,
3440 value_pattern,
3441 NULL, flags);
3442 free(file);
3443 return res;
3444}
3445
3446void repo_config_set_multivar(struct repository *r,
3447 const char *key, const char *value,
3448 const char *value_pattern, unsigned flags)
3449{
3450 char *file = repo_git_path(r, "config");
3451 repo_config_set_multivar_in_file(r, file, key, value,
3452 value_pattern, flags);
3453 free(file);
3454}
3455
3456static size_t section_name_match (const char *buf, const char *name)
3457{
3458 size_t i = 0, j = 0;
3459 int dot = 0;
3460 if (buf[i] != '[')
3461 return 0;
3462 for (i = 1; buf[i] && buf[i] != ']'; i++) {
3463 if (!dot && isspace(buf[i])) {
3464 dot = 1;
3465 if (name[j++] != '.')
3466 break;
3467 for (i++; isspace(buf[i]); i++)
3468 ; /* do nothing */
3469 if (buf[i] != '"')
3470 break;
3471 continue;
3472 }
3473 if (buf[i] == '\\' && dot)
3474 i++;
3475 else if (buf[i] == '"' && dot) {
3476 for (i++; isspace(buf[i]); i++)
3477 ; /* do_nothing */
3478 break;
3479 }
3480 if (buf[i] != name[j++])
3481 break;
3482 }
3483 if (buf[i] == ']' && name[j] == 0) {
3484 /*
3485 * We match, now just find the right length offset by
3486 * gobbling up any whitespace after it, as well
3487 */
3488 i++;
3489 for (; buf[i] && isspace(buf[i]); i++)
3490 ; /* do nothing */
3491 return i;
3492 }
3493 return 0;
3494}
3495
3496static int section_name_is_ok(const char *name)
3497{
3498 /* Empty section names are bogus. */
3499 if (!*name)
3500 return 0;
3501
3502 /*
3503 * Before a dot, we must be alphanumeric or dash. After the first dot,
3504 * anything goes, so we can stop checking.
3505 */
3506 for (; *name && *name != '.'; name++)
3507 if (*name != '-' && !isalnum(*name))
3508 return 0;
3509 return 1;
3510}
3511
3512#define GIT_CONFIG_MAX_LINE_LEN (512 * 1024)
3513
3514/* if new_name == NULL, the section is removed instead */
3515static int repo_config_copy_or_rename_section_in_file(
3516 struct repository *r,
3517 const char *config_filename,
3518 const char *old_name,
3519 const char *new_name, int copy)
3520{
3521 int ret = 0, remove = 0;
3522 char *filename_buf = NULL;
3523 struct lock_file lock = LOCK_INIT;
3524 int out_fd;
3525 struct strbuf buf = STRBUF_INIT;
3526 FILE *config_file = NULL;
3527 struct stat st;
3528 struct strbuf copystr = STRBUF_INIT;
3529 struct config_store_data store;
3530 uint32_t line_nr = 0;
3531
3532 memset(&store, 0, sizeof(store));
3533
3534 if (new_name && !section_name_is_ok(new_name)) {
3535 ret = error(_("invalid section name: %s"), new_name);
3536 goto out_no_rollback;
3537 }
3538
3539 if (!config_filename)
3540 config_filename = filename_buf = repo_git_path(r, "config");
3541
3542 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3543 if (out_fd < 0) {
3544 ret = error(_("could not lock config file %s"), config_filename);
3545 goto out;
3546 }
3547
3548 if (!(config_file = fopen(config_filename, "rb"))) {
3549 ret = warn_on_fopen_errors(config_filename);
3550 if (ret)
3551 goto out;
3552 /* no config file means nothing to rename, no error */
3553 goto commit_and_out;
3554 }
3555
3556 if (fstat(fileno(config_file), &st) == -1) {
3557 ret = error_errno(_("fstat on %s failed"), config_filename);
3558 goto out;
3559 }
3560
3561 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3562 ret = error_errno(_("chmod on %s failed"),
3563 get_lock_file_path(&lock));
3564 goto out;
3565 }
3566
3567 while (!strbuf_getwholeline(&buf, config_file, '\n')) {
3568 size_t i, length;
3569 int is_section = 0;
3570 char *output = buf.buf;
3571
3572 line_nr++;
3573
3574 if (buf.len >= GIT_CONFIG_MAX_LINE_LEN) {
3575 ret = error(_("refusing to work with overly long line "
3576 "in '%s' on line %"PRIuMAX),
3577 config_filename, (uintmax_t)line_nr);
3578 goto out;
3579 }
3580
3581 for (i = 0; buf.buf[i] && isspace(buf.buf[i]); i++)
3582 ; /* do nothing */
3583 if (buf.buf[i] == '[') {
3584 /* it's a section */
3585 size_t offset;
3586 is_section = 1;
3587
3588 /*
3589 * When encountering a new section under -c we
3590 * need to flush out any section we're already
3591 * coping and begin anew. There might be
3592 * multiple [branch "$name"] sections.
3593 */
3594 if (copystr.len > 0) {
3595 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3596 ret = write_error(get_lock_file_path(&lock));
3597 goto out;
3598 }
3599 strbuf_reset(&copystr);
3600 }
3601
3602 offset = section_name_match(&buf.buf[i], old_name);
3603 if (offset > 0) {
3604 ret++;
3605 if (!new_name) {
3606 remove = 1;
3607 continue;
3608 }
3609 store.baselen = strlen(new_name);
3610 if (!copy) {
3611 if (write_section(out_fd, new_name, &store) < 0) {
3612 ret = write_error(get_lock_file_path(&lock));
3613 goto out;
3614 }
3615 /*
3616 * We wrote out the new section, with
3617 * a newline, now skip the old
3618 * section's length
3619 */
3620 output += offset + i;
3621 if (strlen(output) > 0) {
3622 /*
3623 * More content means there's
3624 * a declaration to put on the
3625 * next line; indent with a
3626 * tab
3627 */
3628 output -= 1;
3629 output[0] = '\t';
3630 }
3631 } else {
3632 strbuf_release(&copystr);
3633 copystr = store_create_section(new_name, &store);
3634 }
3635 }
3636 remove = 0;
3637 }
3638 if (remove)
3639 continue;
3640 length = strlen(output);
3641
3642 if (!is_section && copystr.len > 0) {
3643 strbuf_add(&copystr, output, length);
3644 }
3645
3646 if (write_in_full(out_fd, output, length) < 0) {
3647 ret = write_error(get_lock_file_path(&lock));
3648 goto out;
3649 }
3650 }
3651
3652 /*
3653 * Copy a trailing section at the end of the config, won't be
3654 * flushed by the usual "flush because we have a new section
3655 * logic in the loop above.
3656 */
3657 if (copystr.len > 0) {
3658 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3659 ret = write_error(get_lock_file_path(&lock));
3660 goto out;
3661 }
3662 strbuf_reset(&copystr);
3663 }
3664
3665 fclose(config_file);
3666 config_file = NULL;
3667commit_and_out:
3668 if (commit_lock_file(&lock) < 0)
3669 ret = error_errno(_("could not write config file %s"),
3670 config_filename);
3671out:
3672 if (config_file)
3673 fclose(config_file);
3674 rollback_lock_file(&lock);
3675out_no_rollback:
3676 free(filename_buf);
3677 config_store_data_clear(&store);
3678 strbuf_release(&buf);
3679 strbuf_release(&copystr);
3680 return ret;
3681}
3682
3683int repo_config_rename_section_in_file(struct repository *r, const char *config_filename,
3684 const char *old_name, const char *new_name)
3685{
3686 return repo_config_copy_or_rename_section_in_file(r, config_filename,
3687 old_name, new_name, 0);
3688}
3689
3690int repo_config_rename_section(struct repository *r, const char *old_name, const char *new_name)
3691{
3692 return repo_config_rename_section_in_file(r, NULL, old_name, new_name);
3693}
3694
3695int repo_config_copy_section_in_file(struct repository *r, const char *config_filename,
3696 const char *old_name, const char *new_name)
3697{
3698 return repo_config_copy_or_rename_section_in_file(r, config_filename,
3699 old_name, new_name, 1);
3700}
3701
3702int repo_config_copy_section(struct repository *r, const char *old_name, const char *new_name)
3703{
3704 return repo_config_copy_section_in_file(r, NULL, old_name, new_name);
3705}
3706
3707/*
3708 * Call this to report error for your variable that should not
3709 * get a boolean value (i.e. "[my] var" means "true").
3710 */
3711#undef config_error_nonbool
3712int config_error_nonbool(const char *var)
3713{
3714 return error(_("missing value for '%s'"), var);
3715}
3716
3717int parse_config_key(const char *var,
3718 const char *section,
3719 const char **subsection, size_t *subsection_len,
3720 const char **key)
3721{
3722 const char *dot;
3723
3724 /* Does it start with "section." ? */
3725 if (!skip_prefix(var, section, &var) || *var != '.')
3726 return -1;
3727
3728 /*
3729 * Find the key; we don't know yet if we have a subsection, but we must
3730 * parse backwards from the end, since the subsection may have dots in
3731 * it, too.
3732 */
3733 dot = strrchr(var, '.');
3734 *key = dot + 1;
3735
3736 /* Did we have a subsection at all? */
3737 if (dot == var) {
3738 if (subsection) {
3739 *subsection = NULL;
3740 *subsection_len = 0;
3741 }
3742 }
3743 else {
3744 if (!subsection)
3745 return -1;
3746 *subsection = var + 1;
3747 *subsection_len = dot - *subsection;
3748 }
3749
3750 return 0;
3751}
3752
3753const char *config_origin_type_name(enum config_origin_type type)
3754{
3755 switch (type) {
3756 case CONFIG_ORIGIN_BLOB:
3757 return "blob";
3758 case CONFIG_ORIGIN_FILE:
3759 return "file";
3760 case CONFIG_ORIGIN_STDIN:
3761 return "standard input";
3762 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3763 return "submodule-blob";
3764 case CONFIG_ORIGIN_CMDLINE:
3765 return "command line";
3766 default:
3767 BUG("unknown config origin type");
3768 }
3769}
3770
3771const char *config_scope_name(enum config_scope scope)
3772{
3773 switch (scope) {
3774 case CONFIG_SCOPE_SYSTEM:
3775 return "system";
3776 case CONFIG_SCOPE_GLOBAL:
3777 return "global";
3778 case CONFIG_SCOPE_LOCAL:
3779 return "local";
3780 case CONFIG_SCOPE_WORKTREE:
3781 return "worktree";
3782 case CONFIG_SCOPE_COMMAND:
3783 return "command";
3784 case CONFIG_SCOPE_SUBMODULE:
3785 return "submodule";
3786 default:
3787 return "unknown";
3788 }
3789}
3790
3791int lookup_config(const char **mapping, int nr_mapping, const char *var)
3792{
3793 int i;
3794
3795 for (i = 0; i < nr_mapping; i++) {
3796 const char *name = mapping[i];
3797
3798 if (name && !strcasecmp(var, name))
3799 return i;
3800 }
3801 return -1;
3802}
Unnamed repository; edit this file 'description' to name the repository.