Merge branch 'ma/user-manual-markup-update'
[git/git.git] / config.c
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8 #include "cache.h"
9 #include "branch.h"
10 #include "config.h"
11 #include "repository.h"
12 #include "lockfile.h"
13 #include "exec-cmd.h"
14 #include "strbuf.h"
15 #include "quote.h"
16 #include "hashmap.h"
17 #include "string-list.h"
18 #include "object-store.h"
19 #include "utf8.h"
20 #include "dir.h"
21 #include "color.h"
22 #include "refs.h"
23
24 struct config_source {
25 struct config_source *prev;
26 union {
27 FILE *file;
28 struct config_buf {
29 const char *buf;
30 size_t len;
31 size_t pos;
32 } buf;
33 } u;
34 enum config_origin_type origin_type;
35 const char *name;
36 const char *path;
37 enum config_error_action default_error_action;
38 int linenr;
39 int eof;
40 struct strbuf value;
41 struct strbuf var;
42 unsigned subsection_case_sensitive : 1;
43
44 int (*do_fgetc)(struct config_source *c);
45 int (*do_ungetc)(int c, struct config_source *conf);
46 long (*do_ftell)(struct config_source *c);
47 };
48
49 /*
50 * These variables record the "current" config source, which
51 * can be accessed by parsing callbacks.
52 *
53 * The "cf" variable will be non-NULL only when we are actually parsing a real
54 * config source (file, blob, cmdline, etc).
55 *
56 * The "current_config_kvi" variable will be non-NULL only when we are feeding
57 * cached config from a configset into a callback.
58 *
59 * They should generally never be non-NULL at the same time. If they are both
60 * NULL, then we aren't parsing anything (and depending on the function looking
61 * at the variables, it's either a bug for it to be called in the first place,
62 * or it's a function which can be reused for non-config purposes, and should
63 * fall back to some sane behavior).
64 */
65 static struct config_source *cf;
66 static struct key_value_info *current_config_kvi;
67
68 /*
69 * Similar to the variables above, this gives access to the "scope" of the
70 * current value (repo, global, etc). For cached values, it can be found via
71 * the current_config_kvi as above. During parsing, the current value can be
72 * found in this variable. It's not part of "cf" because it transcends a single
73 * file (i.e., a file included from .git/config is still in "repo" scope).
74 */
75 static enum config_scope current_parsing_scope;
76
77 static int core_compression_seen;
78 static int pack_compression_seen;
79 static int zlib_compression_seen;
80
81 static int config_file_fgetc(struct config_source *conf)
82 {
83 return getc_unlocked(conf->u.file);
84 }
85
86 static int config_file_ungetc(int c, struct config_source *conf)
87 {
88 return ungetc(c, conf->u.file);
89 }
90
91 static long config_file_ftell(struct config_source *conf)
92 {
93 return ftell(conf->u.file);
94 }
95
96
97 static int config_buf_fgetc(struct config_source *conf)
98 {
99 if (conf->u.buf.pos < conf->u.buf.len)
100 return conf->u.buf.buf[conf->u.buf.pos++];
101
102 return EOF;
103 }
104
105 static int config_buf_ungetc(int c, struct config_source *conf)
106 {
107 if (conf->u.buf.pos > 0) {
108 conf->u.buf.pos--;
109 if (conf->u.buf.buf[conf->u.buf.pos] != c)
110 BUG("config_buf can only ungetc the same character");
111 return c;
112 }
113
114 return EOF;
115 }
116
117 static long config_buf_ftell(struct config_source *conf)
118 {
119 return conf->u.buf.pos;
120 }
121
122 #define MAX_INCLUDE_DEPTH 10
123 static const char include_depth_advice[] = N_(
124 "exceeded maximum include depth (%d) while including\n"
125 " %s\n"
126 "from\n"
127 " %s\n"
128 "This might be due to circular includes.");
129 static int handle_path_include(const char *path, struct config_include_data *inc)
130 {
131 int ret = 0;
132 struct strbuf buf = STRBUF_INIT;
133 char *expanded;
134
135 if (!path)
136 return config_error_nonbool("include.path");
137
138 expanded = expand_user_path(path, 0);
139 if (!expanded)
140 return error(_("could not expand include path '%s'"), path);
141 path = expanded;
142
143 /*
144 * Use an absolute path as-is, but interpret relative paths
145 * based on the including config file.
146 */
147 if (!is_absolute_path(path)) {
148 char *slash;
149
150 if (!cf || !cf->path)
151 return error(_("relative config includes must come from files"));
152
153 slash = find_last_dir_sep(cf->path);
154 if (slash)
155 strbuf_add(&buf, cf->path, slash - cf->path + 1);
156 strbuf_addstr(&buf, path);
157 path = buf.buf;
158 }
159
160 if (!access_or_die(path, R_OK, 0)) {
161 if (++inc->depth > MAX_INCLUDE_DEPTH)
162 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
163 !cf ? "<unknown>" :
164 cf->name ? cf->name :
165 "the command line");
166 ret = git_config_from_file(git_config_include, path, inc);
167 inc->depth--;
168 }
169 strbuf_release(&buf);
170 free(expanded);
171 return ret;
172 }
173
174 static void add_trailing_starstar_for_dir(struct strbuf *pat)
175 {
176 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
177 strbuf_addstr(pat, "**");
178 }
179
180 static int prepare_include_condition_pattern(struct strbuf *pat)
181 {
182 struct strbuf path = STRBUF_INIT;
183 char *expanded;
184 int prefix = 0;
185
186 expanded = expand_user_path(pat->buf, 1);
187 if (expanded) {
188 strbuf_reset(pat);
189 strbuf_addstr(pat, expanded);
190 free(expanded);
191 }
192
193 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
194 const char *slash;
195
196 if (!cf || !cf->path)
197 return error(_("relative config include "
198 "conditionals must come from files"));
199
200 strbuf_realpath(&path, cf->path, 1);
201 slash = find_last_dir_sep(path.buf);
202 if (!slash)
203 BUG("how is this possible?");
204 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
205 prefix = slash - path.buf + 1 /* slash */;
206 } else if (!is_absolute_path(pat->buf))
207 strbuf_insert(pat, 0, "**/", 3);
208
209 add_trailing_starstar_for_dir(pat);
210
211 strbuf_release(&path);
212 return prefix;
213 }
214
215 static int include_by_gitdir(const struct config_options *opts,
216 const char *cond, size_t cond_len, int icase)
217 {
218 struct strbuf text = STRBUF_INIT;
219 struct strbuf pattern = STRBUF_INIT;
220 int ret = 0, prefix;
221 const char *git_dir;
222 int already_tried_absolute = 0;
223
224 if (opts->git_dir)
225 git_dir = opts->git_dir;
226 else
227 goto done;
228
229 strbuf_realpath(&text, git_dir, 1);
230 strbuf_add(&pattern, cond, cond_len);
231 prefix = prepare_include_condition_pattern(&pattern);
232
233 again:
234 if (prefix < 0)
235 goto done;
236
237 if (prefix > 0) {
238 /*
239 * perform literal matching on the prefix part so that
240 * any wildcard character in it can't create side effects.
241 */
242 if (text.len < prefix)
243 goto done;
244 if (!icase && strncmp(pattern.buf, text.buf, prefix))
245 goto done;
246 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
247 goto done;
248 }
249
250 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
251 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
252
253 if (!ret && !already_tried_absolute) {
254 /*
255 * We've tried e.g. matching gitdir:~/work, but if
256 * ~/work is a symlink to /mnt/storage/work
257 * strbuf_realpath() will expand it, so the rule won't
258 * match. Let's match against a
259 * strbuf_add_absolute_path() version of the path,
260 * which'll do the right thing
261 */
262 strbuf_reset(&text);
263 strbuf_add_absolute_path(&text, git_dir);
264 already_tried_absolute = 1;
265 goto again;
266 }
267 done:
268 strbuf_release(&pattern);
269 strbuf_release(&text);
270 return ret;
271 }
272
273 static int include_by_branch(const char *cond, size_t cond_len)
274 {
275 int flags;
276 int ret;
277 struct strbuf pattern = STRBUF_INIT;
278 const char *refname = !the_repository->gitdir ?
279 NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
280 const char *shortname;
281
282 if (!refname || !(flags & REF_ISSYMREF) ||
283 !skip_prefix(refname, "refs/heads/", &shortname))
284 return 0;
285
286 strbuf_add(&pattern, cond, cond_len);
287 add_trailing_starstar_for_dir(&pattern);
288 ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
289 strbuf_release(&pattern);
290 return ret;
291 }
292
293 static int include_condition_is_true(const struct config_options *opts,
294 const char *cond, size_t cond_len)
295 {
296
297 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
298 return include_by_gitdir(opts, cond, cond_len, 0);
299 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
300 return include_by_gitdir(opts, cond, cond_len, 1);
301 else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
302 return include_by_branch(cond, cond_len);
303
304 /* unknown conditionals are always false */
305 return 0;
306 }
307
308 int git_config_include(const char *var, const char *value, void *data)
309 {
310 struct config_include_data *inc = data;
311 const char *cond, *key;
312 int cond_len;
313 int ret;
314
315 /*
316 * Pass along all values, including "include" directives; this makes it
317 * possible to query information on the includes themselves.
318 */
319 ret = inc->fn(var, value, inc->data);
320 if (ret < 0)
321 return ret;
322
323 if (!strcmp(var, "include.path"))
324 ret = handle_path_include(value, inc);
325
326 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
327 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
328 !strcmp(key, "path"))
329 ret = handle_path_include(value, inc);
330
331 return ret;
332 }
333
334 void git_config_push_parameter(const char *text)
335 {
336 struct strbuf env = STRBUF_INIT;
337 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
338 if (old && *old) {
339 strbuf_addstr(&env, old);
340 strbuf_addch(&env, ' ');
341 }
342 sq_quote_buf(&env, text);
343 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
344 strbuf_release(&env);
345 }
346
347 static inline int iskeychar(int c)
348 {
349 return isalnum(c) || c == '-';
350 }
351
352 /*
353 * Auxiliary function to sanity-check and split the key into the section
354 * identifier and variable name.
355 *
356 * Returns 0 on success, -1 when there is an invalid character in the key and
357 * -2 if there is no section name in the key.
358 *
359 * store_key - pointer to char* which will hold a copy of the key with
360 * lowercase section and variable name
361 * baselen - pointer to int which will hold the length of the
362 * section + subsection part, can be NULL
363 */
364 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
365 {
366 int i, dot, baselen;
367 const char *last_dot = strrchr(key, '.');
368
369 /*
370 * Since "key" actually contains the section name and the real
371 * key name separated by a dot, we have to know where the dot is.
372 */
373
374 if (last_dot == NULL || last_dot == key) {
375 if (!quiet)
376 error(_("key does not contain a section: %s"), key);
377 return -CONFIG_NO_SECTION_OR_NAME;
378 }
379
380 if (!last_dot[1]) {
381 if (!quiet)
382 error(_("key does not contain variable name: %s"), key);
383 return -CONFIG_NO_SECTION_OR_NAME;
384 }
385
386 baselen = last_dot - key;
387 if (baselen_)
388 *baselen_ = baselen;
389
390 /*
391 * Validate the key and while at it, lower case it for matching.
392 */
393 if (store_key)
394 *store_key = xmallocz(strlen(key));
395
396 dot = 0;
397 for (i = 0; key[i]; i++) {
398 unsigned char c = key[i];
399 if (c == '.')
400 dot = 1;
401 /* Leave the extended basename untouched.. */
402 if (!dot || i > baselen) {
403 if (!iskeychar(c) ||
404 (i == baselen + 1 && !isalpha(c))) {
405 if (!quiet)
406 error(_("invalid key: %s"), key);
407 goto out_free_ret_1;
408 }
409 c = tolower(c);
410 } else if (c == '\n') {
411 if (!quiet)
412 error(_("invalid key (newline): %s"), key);
413 goto out_free_ret_1;
414 }
415 if (store_key)
416 (*store_key)[i] = c;
417 }
418
419 return 0;
420
421 out_free_ret_1:
422 if (store_key) {
423 FREE_AND_NULL(*store_key);
424 }
425 return -CONFIG_INVALID_KEY;
426 }
427
428 int git_config_parse_key(const char *key, char **store_key, int *baselen)
429 {
430 return git_config_parse_key_1(key, store_key, baselen, 0);
431 }
432
433 int git_config_key_is_valid(const char *key)
434 {
435 return !git_config_parse_key_1(key, NULL, NULL, 1);
436 }
437
438 int git_config_parse_parameter(const char *text,
439 config_fn_t fn, void *data)
440 {
441 const char *value;
442 char *canonical_name;
443 struct strbuf **pair;
444 int ret;
445
446 pair = strbuf_split_str(text, '=', 2);
447 if (!pair[0])
448 return error(_("bogus config parameter: %s"), text);
449
450 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
451 strbuf_setlen(pair[0], pair[0]->len - 1);
452 value = pair[1] ? pair[1]->buf : "";
453 } else {
454 value = NULL;
455 }
456
457 strbuf_trim(pair[0]);
458 if (!pair[0]->len) {
459 strbuf_list_free(pair);
460 return error(_("bogus config parameter: %s"), text);
461 }
462
463 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
464 ret = -1;
465 } else {
466 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
467 free(canonical_name);
468 }
469 strbuf_list_free(pair);
470 return ret;
471 }
472
473 int git_config_from_parameters(config_fn_t fn, void *data)
474 {
475 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
476 int ret = 0;
477 char *envw;
478 const char **argv = NULL;
479 int nr = 0, alloc = 0;
480 int i;
481 struct config_source source;
482
483 if (!env)
484 return 0;
485
486 memset(&source, 0, sizeof(source));
487 source.prev = cf;
488 source.origin_type = CONFIG_ORIGIN_CMDLINE;
489 cf = &source;
490
491 /* sq_dequote will write over it */
492 envw = xstrdup(env);
493
494 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
495 ret = error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT);
496 goto out;
497 }
498
499 for (i = 0; i < nr; i++) {
500 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
501 ret = -1;
502 goto out;
503 }
504 }
505
506 out:
507 free(argv);
508 free(envw);
509 cf = source.prev;
510 return ret;
511 }
512
513 static int get_next_char(void)
514 {
515 int c = cf->do_fgetc(cf);
516
517 if (c == '\r') {
518 /* DOS like systems */
519 c = cf->do_fgetc(cf);
520 if (c != '\n') {
521 if (c != EOF)
522 cf->do_ungetc(c, cf);
523 c = '\r';
524 }
525 }
526 if (c == '\n')
527 cf->linenr++;
528 if (c == EOF) {
529 cf->eof = 1;
530 cf->linenr++;
531 c = '\n';
532 }
533 return c;
534 }
535
536 static char *parse_value(void)
537 {
538 int quote = 0, comment = 0, space = 0;
539
540 strbuf_reset(&cf->value);
541 for (;;) {
542 int c = get_next_char();
543 if (c == '\n') {
544 if (quote) {
545 cf->linenr--;
546 return NULL;
547 }
548 return cf->value.buf;
549 }
550 if (comment)
551 continue;
552 if (isspace(c) && !quote) {
553 if (cf->value.len)
554 space++;
555 continue;
556 }
557 if (!quote) {
558 if (c == ';' || c == '#') {
559 comment = 1;
560 continue;
561 }
562 }
563 for (; space; space--)
564 strbuf_addch(&cf->value, ' ');
565 if (c == '\\') {
566 c = get_next_char();
567 switch (c) {
568 case '\n':
569 continue;
570 case 't':
571 c = '\t';
572 break;
573 case 'b':
574 c = '\b';
575 break;
576 case 'n':
577 c = '\n';
578 break;
579 /* Some characters escape as themselves */
580 case '\\': case '"':
581 break;
582 /* Reject unknown escape sequences */
583 default:
584 return NULL;
585 }
586 strbuf_addch(&cf->value, c);
587 continue;
588 }
589 if (c == '"') {
590 quote = 1-quote;
591 continue;
592 }
593 strbuf_addch(&cf->value, c);
594 }
595 }
596
597 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
598 {
599 int c;
600 char *value;
601 int ret;
602
603 /* Get the full name */
604 for (;;) {
605 c = get_next_char();
606 if (cf->eof)
607 break;
608 if (!iskeychar(c))
609 break;
610 strbuf_addch(name, tolower(c));
611 }
612
613 while (c == ' ' || c == '\t')
614 c = get_next_char();
615
616 value = NULL;
617 if (c != '\n') {
618 if (c != '=')
619 return -1;
620 value = parse_value();
621 if (!value)
622 return -1;
623 }
624 /*
625 * We already consumed the \n, but we need linenr to point to
626 * the line we just parsed during the call to fn to get
627 * accurate line number in error messages.
628 */
629 cf->linenr--;
630 ret = fn(name->buf, value, data);
631 if (ret >= 0)
632 cf->linenr++;
633 return ret;
634 }
635
636 static int get_extended_base_var(struct strbuf *name, int c)
637 {
638 cf->subsection_case_sensitive = 0;
639 do {
640 if (c == '\n')
641 goto error_incomplete_line;
642 c = get_next_char();
643 } while (isspace(c));
644
645 /* We require the format to be '[base "extension"]' */
646 if (c != '"')
647 return -1;
648 strbuf_addch(name, '.');
649
650 for (;;) {
651 int c = get_next_char();
652 if (c == '\n')
653 goto error_incomplete_line;
654 if (c == '"')
655 break;
656 if (c == '\\') {
657 c = get_next_char();
658 if (c == '\n')
659 goto error_incomplete_line;
660 }
661 strbuf_addch(name, c);
662 }
663
664 /* Final ']' */
665 if (get_next_char() != ']')
666 return -1;
667 return 0;
668 error_incomplete_line:
669 cf->linenr--;
670 return -1;
671 }
672
673 static int get_base_var(struct strbuf *name)
674 {
675 cf->subsection_case_sensitive = 1;
676 for (;;) {
677 int c = get_next_char();
678 if (cf->eof)
679 return -1;
680 if (c == ']')
681 return 0;
682 if (isspace(c))
683 return get_extended_base_var(name, c);
684 if (!iskeychar(c) && c != '.')
685 return -1;
686 strbuf_addch(name, tolower(c));
687 }
688 }
689
690 struct parse_event_data {
691 enum config_event_t previous_type;
692 size_t previous_offset;
693 const struct config_options *opts;
694 };
695
696 static int do_event(enum config_event_t type, struct parse_event_data *data)
697 {
698 size_t offset;
699
700 if (!data->opts || !data->opts->event_fn)
701 return 0;
702
703 if (type == CONFIG_EVENT_WHITESPACE &&
704 data->previous_type == type)
705 return 0;
706
707 offset = cf->do_ftell(cf);
708 /*
709 * At EOF, the parser always "inserts" an extra '\n', therefore
710 * the end offset of the event is the current file position, otherwise
711 * we will already have advanced to the next event.
712 */
713 if (type != CONFIG_EVENT_EOF)
714 offset--;
715
716 if (data->previous_type != CONFIG_EVENT_EOF &&
717 data->opts->event_fn(data->previous_type, data->previous_offset,
718 offset, data->opts->event_fn_data) < 0)
719 return -1;
720
721 data->previous_type = type;
722 data->previous_offset = offset;
723
724 return 0;
725 }
726
727 static int git_parse_source(config_fn_t fn, void *data,
728 const struct config_options *opts)
729 {
730 int comment = 0;
731 int baselen = 0;
732 struct strbuf *var = &cf->var;
733 int error_return = 0;
734 char *error_msg = NULL;
735
736 /* U+FEFF Byte Order Mark in UTF8 */
737 const char *bomptr = utf8_bom;
738
739 /* For the parser event callback */
740 struct parse_event_data event_data = {
741 CONFIG_EVENT_EOF, 0, opts
742 };
743
744 for (;;) {
745 int c;
746
747 c = get_next_char();
748 if (bomptr && *bomptr) {
749 /* We are at the file beginning; skip UTF8-encoded BOM
750 * if present. Sane editors won't put this in on their
751 * own, but e.g. Windows Notepad will do it happily. */
752 if (c == (*bomptr & 0377)) {
753 bomptr++;
754 continue;
755 } else {
756 /* Do not tolerate partial BOM. */
757 if (bomptr != utf8_bom)
758 break;
759 /* No BOM at file beginning. Cool. */
760 bomptr = NULL;
761 }
762 }
763 if (c == '\n') {
764 if (cf->eof) {
765 if (do_event(CONFIG_EVENT_EOF, &event_data) < 0)
766 return -1;
767 return 0;
768 }
769 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
770 return -1;
771 comment = 0;
772 continue;
773 }
774 if (comment)
775 continue;
776 if (isspace(c)) {
777 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
778 return -1;
779 continue;
780 }
781 if (c == '#' || c == ';') {
782 if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0)
783 return -1;
784 comment = 1;
785 continue;
786 }
787 if (c == '[') {
788 if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0)
789 return -1;
790
791 /* Reset prior to determining a new stem */
792 strbuf_reset(var);
793 if (get_base_var(var) < 0 || var->len < 1)
794 break;
795 strbuf_addch(var, '.');
796 baselen = var->len;
797 continue;
798 }
799 if (!isalpha(c))
800 break;
801
802 if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0)
803 return -1;
804
805 /*
806 * Truncate the var name back to the section header
807 * stem prior to grabbing the suffix part of the name
808 * and the value.
809 */
810 strbuf_setlen(var, baselen);
811 strbuf_addch(var, tolower(c));
812 if (get_value(fn, data, var) < 0)
813 break;
814 }
815
816 if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0)
817 return -1;
818
819 switch (cf->origin_type) {
820 case CONFIG_ORIGIN_BLOB:
821 error_msg = xstrfmt(_("bad config line %d in blob %s"),
822 cf->linenr, cf->name);
823 break;
824 case CONFIG_ORIGIN_FILE:
825 error_msg = xstrfmt(_("bad config line %d in file %s"),
826 cf->linenr, cf->name);
827 break;
828 case CONFIG_ORIGIN_STDIN:
829 error_msg = xstrfmt(_("bad config line %d in standard input"),
830 cf->linenr);
831 break;
832 case CONFIG_ORIGIN_SUBMODULE_BLOB:
833 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
834 cf->linenr, cf->name);
835 break;
836 case CONFIG_ORIGIN_CMDLINE:
837 error_msg = xstrfmt(_("bad config line %d in command line %s"),
838 cf->linenr, cf->name);
839 break;
840 default:
841 error_msg = xstrfmt(_("bad config line %d in %s"),
842 cf->linenr, cf->name);
843 }
844
845 switch (opts && opts->error_action ?
846 opts->error_action :
847 cf->default_error_action) {
848 case CONFIG_ERROR_DIE:
849 die("%s", error_msg);
850 break;
851 case CONFIG_ERROR_ERROR:
852 error_return = error("%s", error_msg);
853 break;
854 case CONFIG_ERROR_SILENT:
855 error_return = -1;
856 break;
857 case CONFIG_ERROR_UNSET:
858 BUG("config error action unset");
859 }
860
861 free(error_msg);
862 return error_return;
863 }
864
865 static uintmax_t get_unit_factor(const char *end)
866 {
867 if (!*end)
868 return 1;
869 else if (!strcasecmp(end, "k"))
870 return 1024;
871 else if (!strcasecmp(end, "m"))
872 return 1024 * 1024;
873 else if (!strcasecmp(end, "g"))
874 return 1024 * 1024 * 1024;
875 return 0;
876 }
877
878 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
879 {
880 if (value && *value) {
881 char *end;
882 intmax_t val;
883 uintmax_t uval;
884 uintmax_t factor;
885
886 errno = 0;
887 val = strtoimax(value, &end, 0);
888 if (errno == ERANGE)
889 return 0;
890 factor = get_unit_factor(end);
891 if (!factor) {
892 errno = EINVAL;
893 return 0;
894 }
895 uval = val < 0 ? -val : val;
896 if (unsigned_mult_overflows(factor, uval) ||
897 factor * uval > max) {
898 errno = ERANGE;
899 return 0;
900 }
901 val *= factor;
902 *ret = val;
903 return 1;
904 }
905 errno = EINVAL;
906 return 0;
907 }
908
909 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
910 {
911 if (value && *value) {
912 char *end;
913 uintmax_t val;
914 uintmax_t factor;
915
916 errno = 0;
917 val = strtoumax(value, &end, 0);
918 if (errno == ERANGE)
919 return 0;
920 factor = get_unit_factor(end);
921 if (!factor) {
922 errno = EINVAL;
923 return 0;
924 }
925 if (unsigned_mult_overflows(factor, val) ||
926 factor * val > max) {
927 errno = ERANGE;
928 return 0;
929 }
930 val *= factor;
931 *ret = val;
932 return 1;
933 }
934 errno = EINVAL;
935 return 0;
936 }
937
938 static int git_parse_int(const char *value, int *ret)
939 {
940 intmax_t tmp;
941 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
942 return 0;
943 *ret = tmp;
944 return 1;
945 }
946
947 static int git_parse_int64(const char *value, int64_t *ret)
948 {
949 intmax_t tmp;
950 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
951 return 0;
952 *ret = tmp;
953 return 1;
954 }
955
956 int git_parse_ulong(const char *value, unsigned long *ret)
957 {
958 uintmax_t tmp;
959 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
960 return 0;
961 *ret = tmp;
962 return 1;
963 }
964
965 int git_parse_ssize_t(const char *value, ssize_t *ret)
966 {
967 intmax_t tmp;
968 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
969 return 0;
970 *ret = tmp;
971 return 1;
972 }
973
974 NORETURN
975 static void die_bad_number(const char *name, const char *value)
976 {
977 const char *error_type = (errno == ERANGE) ?
978 N_("out of range") : N_("invalid unit");
979 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
980
981 if (!value)
982 value = "";
983
984 if (!strcmp(name, "GIT_TEST_GETTEXT_POISON"))
985 /*
986 * We explicitly *don't* use _() here since it would
987 * cause an infinite loop with _() needing to call
988 * use_gettext_poison(). This is why marked up
989 * translations with N_() above.
990 */
991 die(bad_numeric, value, name, error_type);
992
993 if (!(cf && cf->name))
994 die(_(bad_numeric), value, name, _(error_type));
995
996 switch (cf->origin_type) {
997 case CONFIG_ORIGIN_BLOB:
998 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
999 value, name, cf->name, _(error_type));
1000 case CONFIG_ORIGIN_FILE:
1001 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
1002 value, name, cf->name, _(error_type));
1003 case CONFIG_ORIGIN_STDIN:
1004 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
1005 value, name, _(error_type));
1006 case CONFIG_ORIGIN_SUBMODULE_BLOB:
1007 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
1008 value, name, cf->name, _(error_type));
1009 case CONFIG_ORIGIN_CMDLINE:
1010 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
1011 value, name, cf->name, _(error_type));
1012 default:
1013 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
1014 value, name, cf->name, _(error_type));
1015 }
1016 }
1017
1018 int git_config_int(const char *name, const char *value)
1019 {
1020 int ret;
1021 if (!git_parse_int(value, &ret))
1022 die_bad_number(name, value);
1023 return ret;
1024 }
1025
1026 int64_t git_config_int64(const char *name, const char *value)
1027 {
1028 int64_t ret;
1029 if (!git_parse_int64(value, &ret))
1030 die_bad_number(name, value);
1031 return ret;
1032 }
1033
1034 unsigned long git_config_ulong(const char *name, const char *value)
1035 {
1036 unsigned long ret;
1037 if (!git_parse_ulong(value, &ret))
1038 die_bad_number(name, value);
1039 return ret;
1040 }
1041
1042 ssize_t git_config_ssize_t(const char *name, const char *value)
1043 {
1044 ssize_t ret;
1045 if (!git_parse_ssize_t(value, &ret))
1046 die_bad_number(name, value);
1047 return ret;
1048 }
1049
1050 static int git_parse_maybe_bool_text(const char *value)
1051 {
1052 if (!value)
1053 return 1;
1054 if (!*value)
1055 return 0;
1056 if (!strcasecmp(value, "true")
1057 || !strcasecmp(value, "yes")
1058 || !strcasecmp(value, "on"))
1059 return 1;
1060 if (!strcasecmp(value, "false")
1061 || !strcasecmp(value, "no")
1062 || !strcasecmp(value, "off"))
1063 return 0;
1064 return -1;
1065 }
1066
1067 int git_parse_maybe_bool(const char *value)
1068 {
1069 int v = git_parse_maybe_bool_text(value);
1070 if (0 <= v)
1071 return v;
1072 if (git_parse_int(value, &v))
1073 return !!v;
1074 return -1;
1075 }
1076
1077 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1078 {
1079 int v = git_parse_maybe_bool_text(value);
1080 if (0 <= v) {
1081 *is_bool = 1;
1082 return v;
1083 }
1084 *is_bool = 0;
1085 return git_config_int(name, value);
1086 }
1087
1088 int git_config_bool(const char *name, const char *value)
1089 {
1090 int discard;
1091 return !!git_config_bool_or_int(name, value, &discard);
1092 }
1093
1094 int git_config_string(const char **dest, const char *var, const char *value)
1095 {
1096 if (!value)
1097 return config_error_nonbool(var);
1098 *dest = xstrdup(value);
1099 return 0;
1100 }
1101
1102 int git_config_pathname(const char **dest, const char *var, const char *value)
1103 {
1104 if (!value)
1105 return config_error_nonbool(var);
1106 *dest = expand_user_path(value, 0);
1107 if (!*dest)
1108 die(_("failed to expand user dir in: '%s'"), value);
1109 return 0;
1110 }
1111
1112 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1113 {
1114 if (!value)
1115 return config_error_nonbool(var);
1116 if (parse_expiry_date(value, timestamp))
1117 return error(_("'%s' for '%s' is not a valid timestamp"),
1118 value, var);
1119 return 0;
1120 }
1121
1122 int git_config_color(char *dest, const char *var, const char *value)
1123 {
1124 if (!value)
1125 return config_error_nonbool(var);
1126 if (color_parse(value, dest) < 0)
1127 return -1;
1128 return 0;
1129 }
1130
1131 static int git_default_core_config(const char *var, const char *value, void *cb)
1132 {
1133 /* This needs a better name */
1134 if (!strcmp(var, "core.filemode")) {
1135 trust_executable_bit = git_config_bool(var, value);
1136 return 0;
1137 }
1138 if (!strcmp(var, "core.trustctime")) {
1139 trust_ctime = git_config_bool(var, value);
1140 return 0;
1141 }
1142 if (!strcmp(var, "core.checkstat")) {
1143 if (!strcasecmp(value, "default"))
1144 check_stat = 1;
1145 else if (!strcasecmp(value, "minimal"))
1146 check_stat = 0;
1147 }
1148
1149 if (!strcmp(var, "core.quotepath")) {
1150 quote_path_fully = git_config_bool(var, value);
1151 return 0;
1152 }
1153
1154 if (!strcmp(var, "core.symlinks")) {
1155 has_symlinks = git_config_bool(var, value);
1156 return 0;
1157 }
1158
1159 if (!strcmp(var, "core.ignorecase")) {
1160 ignore_case = git_config_bool(var, value);
1161 return 0;
1162 }
1163
1164 if (!strcmp(var, "core.attributesfile"))
1165 return git_config_pathname(&git_attributes_file, var, value);
1166
1167 if (!strcmp(var, "core.hookspath"))
1168 return git_config_pathname(&git_hooks_path, var, value);
1169
1170 if (!strcmp(var, "core.bare")) {
1171 is_bare_repository_cfg = git_config_bool(var, value);
1172 return 0;
1173 }
1174
1175 if (!strcmp(var, "core.ignorestat")) {
1176 assume_unchanged = git_config_bool(var, value);
1177 return 0;
1178 }
1179
1180 if (!strcmp(var, "core.prefersymlinkrefs")) {
1181 prefer_symlink_refs = git_config_bool(var, value);
1182 return 0;
1183 }
1184
1185 if (!strcmp(var, "core.logallrefupdates")) {
1186 if (value && !strcasecmp(value, "always"))
1187 log_all_ref_updates = LOG_REFS_ALWAYS;
1188 else if (git_config_bool(var, value))
1189 log_all_ref_updates = LOG_REFS_NORMAL;
1190 else
1191 log_all_ref_updates = LOG_REFS_NONE;
1192 return 0;
1193 }
1194
1195 if (!strcmp(var, "core.warnambiguousrefs")) {
1196 warn_ambiguous_refs = git_config_bool(var, value);
1197 return 0;
1198 }
1199
1200 if (!strcmp(var, "core.abbrev")) {
1201 if (!value)
1202 return config_error_nonbool(var);
1203 if (!strcasecmp(value, "auto"))
1204 default_abbrev = -1;
1205 else {
1206 int abbrev = git_config_int(var, value);
1207 if (abbrev < minimum_abbrev || abbrev > 40)
1208 return error(_("abbrev length out of range: %d"), abbrev);
1209 default_abbrev = abbrev;
1210 }
1211 return 0;
1212 }
1213
1214 if (!strcmp(var, "core.disambiguate"))
1215 return set_disambiguate_hint_config(var, value);
1216
1217 if (!strcmp(var, "core.loosecompression")) {
1218 int level = git_config_int(var, value);
1219 if (level == -1)
1220 level = Z_DEFAULT_COMPRESSION;
1221 else if (level < 0 || level > Z_BEST_COMPRESSION)
1222 die(_("bad zlib compression level %d"), level);
1223 zlib_compression_level = level;
1224 zlib_compression_seen = 1;
1225 return 0;
1226 }
1227
1228 if (!strcmp(var, "core.compression")) {
1229 int level = git_config_int(var, value);
1230 if (level == -1)
1231 level = Z_DEFAULT_COMPRESSION;
1232 else if (level < 0 || level > Z_BEST_COMPRESSION)
1233 die(_("bad zlib compression level %d"), level);
1234 core_compression_level = level;
1235 core_compression_seen = 1;
1236 if (!zlib_compression_seen)
1237 zlib_compression_level = level;
1238 if (!pack_compression_seen)
1239 pack_compression_level = level;
1240 return 0;
1241 }
1242
1243 if (!strcmp(var, "core.packedgitwindowsize")) {
1244 int pgsz_x2 = getpagesize() * 2;
1245 packed_git_window_size = git_config_ulong(var, value);
1246
1247 /* This value must be multiple of (pagesize * 2) */
1248 packed_git_window_size /= pgsz_x2;
1249 if (packed_git_window_size < 1)
1250 packed_git_window_size = 1;
1251 packed_git_window_size *= pgsz_x2;
1252 return 0;
1253 }
1254
1255 if (!strcmp(var, "core.bigfilethreshold")) {
1256 big_file_threshold = git_config_ulong(var, value);
1257 return 0;
1258 }
1259
1260 if (!strcmp(var, "core.packedgitlimit")) {
1261 packed_git_limit = git_config_ulong(var, value);
1262 return 0;
1263 }
1264
1265 if (!strcmp(var, "core.deltabasecachelimit")) {
1266 delta_base_cache_limit = git_config_ulong(var, value);
1267 return 0;
1268 }
1269
1270 if (!strcmp(var, "core.autocrlf")) {
1271 if (value && !strcasecmp(value, "input")) {
1272 auto_crlf = AUTO_CRLF_INPUT;
1273 return 0;
1274 }
1275 auto_crlf = git_config_bool(var, value);
1276 return 0;
1277 }
1278
1279 if (!strcmp(var, "core.safecrlf")) {
1280 int eol_rndtrp_die;
1281 if (value && !strcasecmp(value, "warn")) {
1282 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1283 return 0;
1284 }
1285 eol_rndtrp_die = git_config_bool(var, value);
1286 global_conv_flags_eol = eol_rndtrp_die ?
1287 CONV_EOL_RNDTRP_DIE : 0;
1288 return 0;
1289 }
1290
1291 if (!strcmp(var, "core.eol")) {
1292 if (value && !strcasecmp(value, "lf"))
1293 core_eol = EOL_LF;
1294 else if (value && !strcasecmp(value, "crlf"))
1295 core_eol = EOL_CRLF;
1296 else if (value && !strcasecmp(value, "native"))
1297 core_eol = EOL_NATIVE;
1298 else
1299 core_eol = EOL_UNSET;
1300 return 0;
1301 }
1302
1303 if (!strcmp(var, "core.checkroundtripencoding")) {
1304 check_roundtrip_encoding = xstrdup(value);
1305 return 0;
1306 }
1307
1308 if (!strcmp(var, "core.notesref")) {
1309 notes_ref_name = xstrdup(value);
1310 return 0;
1311 }
1312
1313 if (!strcmp(var, "core.editor"))
1314 return git_config_string(&editor_program, var, value);
1315
1316 if (!strcmp(var, "core.commentchar")) {
1317 if (!value)
1318 return config_error_nonbool(var);
1319 else if (!strcasecmp(value, "auto"))
1320 auto_comment_line_char = 1;
1321 else if (value[0] && !value[1]) {
1322 comment_line_char = value[0];
1323 auto_comment_line_char = 0;
1324 } else
1325 return error(_("core.commentChar should only be one character"));
1326 return 0;
1327 }
1328
1329 if (!strcmp(var, "core.askpass"))
1330 return git_config_string(&askpass_program, var, value);
1331
1332 if (!strcmp(var, "core.excludesfile"))
1333 return git_config_pathname(&excludes_file, var, value);
1334
1335 if (!strcmp(var, "core.whitespace")) {
1336 if (!value)
1337 return config_error_nonbool(var);
1338 whitespace_rule_cfg = parse_whitespace_rule(value);
1339 return 0;
1340 }
1341
1342 if (!strcmp(var, "core.fsyncobjectfiles")) {
1343 fsync_object_files = git_config_bool(var, value);
1344 return 0;
1345 }
1346
1347 if (!strcmp(var, "core.preloadindex")) {
1348 core_preload_index = git_config_bool(var, value);
1349 return 0;
1350 }
1351
1352 if (!strcmp(var, "core.createobject")) {
1353 if (!strcmp(value, "rename"))
1354 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1355 else if (!strcmp(value, "link"))
1356 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1357 else
1358 die(_("invalid mode for object creation: %s"), value);
1359 return 0;
1360 }
1361
1362 if (!strcmp(var, "core.sparsecheckout")) {
1363 core_apply_sparse_checkout = git_config_bool(var, value);
1364 return 0;
1365 }
1366
1367 if (!strcmp(var, "core.precomposeunicode")) {
1368 precomposed_unicode = git_config_bool(var, value);
1369 return 0;
1370 }
1371
1372 if (!strcmp(var, "core.protecthfs")) {
1373 protect_hfs = git_config_bool(var, value);
1374 return 0;
1375 }
1376
1377 if (!strcmp(var, "core.protectntfs")) {
1378 protect_ntfs = git_config_bool(var, value);
1379 return 0;
1380 }
1381
1382 if (!strcmp(var, "core.usereplacerefs")) {
1383 read_replace_refs = git_config_bool(var, value);
1384 return 0;
1385 }
1386
1387 /* Add other config variables here and to Documentation/config.txt. */
1388 return platform_core_config(var, value, cb);
1389 }
1390
1391 static int git_default_i18n_config(const char *var, const char *value)
1392 {
1393 if (!strcmp(var, "i18n.commitencoding"))
1394 return git_config_string(&git_commit_encoding, var, value);
1395
1396 if (!strcmp(var, "i18n.logoutputencoding"))
1397 return git_config_string(&git_log_output_encoding, var, value);
1398
1399 /* Add other config variables here and to Documentation/config.txt. */
1400 return 0;
1401 }
1402
1403 static int git_default_branch_config(const char *var, const char *value)
1404 {
1405 if (!strcmp(var, "branch.autosetupmerge")) {
1406 if (value && !strcasecmp(value, "always")) {
1407 git_branch_track = BRANCH_TRACK_ALWAYS;
1408 return 0;
1409 }
1410 git_branch_track = git_config_bool(var, value);
1411 return 0;
1412 }
1413 if (!strcmp(var, "branch.autosetuprebase")) {
1414 if (!value)
1415 return config_error_nonbool(var);
1416 else if (!strcmp(value, "never"))
1417 autorebase = AUTOREBASE_NEVER;
1418 else if (!strcmp(value, "local"))
1419 autorebase = AUTOREBASE_LOCAL;
1420 else if (!strcmp(value, "remote"))
1421 autorebase = AUTOREBASE_REMOTE;
1422 else if (!strcmp(value, "always"))
1423 autorebase = AUTOREBASE_ALWAYS;
1424 else
1425 return error(_("malformed value for %s"), var);
1426 return 0;
1427 }
1428
1429 /* Add other config variables here and to Documentation/config.txt. */
1430 return 0;
1431 }
1432
1433 static int git_default_push_config(const char *var, const char *value)
1434 {
1435 if (!strcmp(var, "push.default")) {
1436 if (!value)
1437 return config_error_nonbool(var);
1438 else if (!strcmp(value, "nothing"))
1439 push_default = PUSH_DEFAULT_NOTHING;
1440 else if (!strcmp(value, "matching"))
1441 push_default = PUSH_DEFAULT_MATCHING;
1442 else if (!strcmp(value, "simple"))
1443 push_default = PUSH_DEFAULT_SIMPLE;
1444 else if (!strcmp(value, "upstream"))
1445 push_default = PUSH_DEFAULT_UPSTREAM;
1446 else if (!strcmp(value, "tracking")) /* deprecated */
1447 push_default = PUSH_DEFAULT_UPSTREAM;
1448 else if (!strcmp(value, "current"))
1449 push_default = PUSH_DEFAULT_CURRENT;
1450 else {
1451 error(_("malformed value for %s: %s"), var, value);
1452 return error(_("must be one of nothing, matching, simple, "
1453 "upstream or current"));
1454 }
1455 return 0;
1456 }
1457
1458 /* Add other config variables here and to Documentation/config.txt. */
1459 return 0;
1460 }
1461
1462 static int git_default_mailmap_config(const char *var, const char *value)
1463 {
1464 if (!strcmp(var, "mailmap.file"))
1465 return git_config_pathname(&git_mailmap_file, var, value);
1466 if (!strcmp(var, "mailmap.blob"))
1467 return git_config_string(&git_mailmap_blob, var, value);
1468
1469 /* Add other config variables here and to Documentation/config.txt. */
1470 return 0;
1471 }
1472
1473 int git_default_config(const char *var, const char *value, void *cb)
1474 {
1475 if (starts_with(var, "core."))
1476 return git_default_core_config(var, value, cb);
1477
1478 if (starts_with(var, "user.") ||
1479 starts_with(var, "author.") ||
1480 starts_with(var, "committer."))
1481 return git_ident_config(var, value, cb);
1482
1483 if (starts_with(var, "i18n."))
1484 return git_default_i18n_config(var, value);
1485
1486 if (starts_with(var, "branch."))
1487 return git_default_branch_config(var, value);
1488
1489 if (starts_with(var, "push."))
1490 return git_default_push_config(var, value);
1491
1492 if (starts_with(var, "mailmap."))
1493 return git_default_mailmap_config(var, value);
1494
1495 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1496 return git_default_advice_config(var, value);
1497
1498 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1499 pager_use_color = git_config_bool(var,value);
1500 return 0;
1501 }
1502
1503 if (!strcmp(var, "pack.packsizelimit")) {
1504 pack_size_limit_cfg = git_config_ulong(var, value);
1505 return 0;
1506 }
1507
1508 if (!strcmp(var, "pack.compression")) {
1509 int level = git_config_int(var, value);
1510 if (level == -1)
1511 level = Z_DEFAULT_COMPRESSION;
1512 else if (level < 0 || level > Z_BEST_COMPRESSION)
1513 die(_("bad pack compression level %d"), level);
1514 pack_compression_level = level;
1515 pack_compression_seen = 1;
1516 return 0;
1517 }
1518
1519 /* Add other config variables here and to Documentation/config.txt. */
1520 return 0;
1521 }
1522
1523 /*
1524 * All source specific fields in the union, die_on_error, name and the callbacks
1525 * fgetc, ungetc, ftell of top need to be initialized before calling
1526 * this function.
1527 */
1528 static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
1529 const struct config_options *opts)
1530 {
1531 int ret;
1532
1533 /* push config-file parsing state stack */
1534 top->prev = cf;
1535 top->linenr = 1;
1536 top->eof = 0;
1537 strbuf_init(&top->value, 1024);
1538 strbuf_init(&top->var, 1024);
1539 cf = top;
1540
1541 ret = git_parse_source(fn, data, opts);
1542
1543 /* pop config-file parsing state stack */
1544 strbuf_release(&top->value);
1545 strbuf_release(&top->var);
1546 cf = top->prev;
1547
1548 return ret;
1549 }
1550
1551 static int do_config_from_file(config_fn_t fn,
1552 const enum config_origin_type origin_type,
1553 const char *name, const char *path, FILE *f,
1554 void *data, const struct config_options *opts)
1555 {
1556 struct config_source top;
1557 int ret;
1558
1559 top.u.file = f;
1560 top.origin_type = origin_type;
1561 top.name = name;
1562 top.path = path;
1563 top.default_error_action = CONFIG_ERROR_DIE;
1564 top.do_fgetc = config_file_fgetc;
1565 top.do_ungetc = config_file_ungetc;
1566 top.do_ftell = config_file_ftell;
1567
1568 flockfile(f);
1569 ret = do_config_from(&top, fn, data, opts);
1570 funlockfile(f);
1571 return ret;
1572 }
1573
1574 static int git_config_from_stdin(config_fn_t fn, void *data)
1575 {
1576 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1577 data, NULL);
1578 }
1579
1580 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1581 void *data,
1582 const struct config_options *opts)
1583 {
1584 int ret = -1;
1585 FILE *f;
1586
1587 f = fopen_or_warn(filename, "r");
1588 if (f) {
1589 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1590 filename, f, data, opts);
1591 fclose(f);
1592 }
1593 return ret;
1594 }
1595
1596 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1597 {
1598 return git_config_from_file_with_options(fn, filename, data, NULL);
1599 }
1600
1601 int git_config_from_mem(config_fn_t fn,
1602 const enum config_origin_type origin_type,
1603 const char *name, const char *buf, size_t len,
1604 void *data, const struct config_options *opts)
1605 {
1606 struct config_source top;
1607
1608 top.u.buf.buf = buf;
1609 top.u.buf.len = len;
1610 top.u.buf.pos = 0;
1611 top.origin_type = origin_type;
1612 top.name = name;
1613 top.path = NULL;
1614 top.default_error_action = CONFIG_ERROR_ERROR;
1615 top.do_fgetc = config_buf_fgetc;
1616 top.do_ungetc = config_buf_ungetc;
1617 top.do_ftell = config_buf_ftell;
1618
1619 return do_config_from(&top, fn, data, opts);
1620 }
1621
1622 int git_config_from_blob_oid(config_fn_t fn,
1623 const char *name,
1624 const struct object_id *oid,
1625 void *data)
1626 {
1627 enum object_type type;
1628 char *buf;
1629 unsigned long size;
1630 int ret;
1631
1632 buf = read_object_file(oid, &type, &size);
1633 if (!buf)
1634 return error(_("unable to load config blob object '%s'"), name);
1635 if (type != OBJ_BLOB) {
1636 free(buf);
1637 return error(_("reference '%s' does not point to a blob"), name);
1638 }
1639
1640 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1641 data, NULL);
1642 free(buf);
1643
1644 return ret;
1645 }
1646
1647 static int git_config_from_blob_ref(config_fn_t fn,
1648 const char *name,
1649 void *data)
1650 {
1651 struct object_id oid;
1652
1653 if (get_oid(name, &oid) < 0)
1654 return error(_("unable to resolve config blob '%s'"), name);
1655 return git_config_from_blob_oid(fn, name, &oid, data);
1656 }
1657
1658 const char *git_etc_gitconfig(void)
1659 {
1660 static const char *system_wide;
1661 if (!system_wide)
1662 system_wide = system_path(ETC_GITCONFIG);
1663 return system_wide;
1664 }
1665
1666 /*
1667 * Parse environment variable 'k' as a boolean (in various
1668 * possible spellings); if missing, use the default value 'def'.
1669 */
1670 int git_env_bool(const char *k, int def)
1671 {
1672 const char *v = getenv(k);
1673 return v ? git_config_bool(k, v) : def;
1674 }
1675
1676 /*
1677 * Parse environment variable 'k' as ulong with possibly a unit
1678 * suffix; if missing, use the default value 'val'.
1679 */
1680 unsigned long git_env_ulong(const char *k, unsigned long val)
1681 {
1682 const char *v = getenv(k);
1683 if (v && !git_parse_ulong(v, &val))
1684 die(_("failed to parse %s"), k);
1685 return val;
1686 }
1687
1688 int git_config_system(void)
1689 {
1690 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1691 }
1692
1693 static int do_git_config_sequence(const struct config_options *opts,
1694 config_fn_t fn, void *data)
1695 {
1696 int ret = 0;
1697 char *xdg_config = xdg_config_home("config");
1698 char *user_config = expand_user_path("~/.gitconfig", 0);
1699 char *repo_config;
1700
1701 if (opts->commondir)
1702 repo_config = mkpathdup("%s/config", opts->commondir);
1703 else if (opts->git_dir)
1704 BUG("git_dir without commondir");
1705 else
1706 repo_config = NULL;
1707
1708 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1709 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK,
1710 opts->system_gently ?
1711 ACCESS_EACCES_OK : 0))
1712 ret += git_config_from_file(fn, git_etc_gitconfig(),
1713 data);
1714
1715 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1716 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1717 ret += git_config_from_file(fn, xdg_config, data);
1718
1719 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1720 ret += git_config_from_file(fn, user_config, data);
1721
1722 current_parsing_scope = CONFIG_SCOPE_REPO;
1723 if (!opts->ignore_repo && repo_config &&
1724 !access_or_die(repo_config, R_OK, 0))
1725 ret += git_config_from_file(fn, repo_config, data);
1726
1727 /*
1728 * Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
1729 * But let's not complicate things before it's actually needed.
1730 */
1731 if (!opts->ignore_worktree && repository_format_worktree_config) {
1732 char *path = git_pathdup("config.worktree");
1733 if (!access_or_die(path, R_OK, 0))
1734 ret += git_config_from_file(fn, path, data);
1735 free(path);
1736 }
1737
1738 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1739 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
1740 die(_("unable to parse command-line config"));
1741
1742 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1743 free(xdg_config);
1744 free(user_config);
1745 free(repo_config);
1746 return ret;
1747 }
1748
1749 int config_with_options(config_fn_t fn, void *data,
1750 struct git_config_source *config_source,
1751 const struct config_options *opts)
1752 {
1753 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1754
1755 if (opts->respect_includes) {
1756 inc.fn = fn;
1757 inc.data = data;
1758 inc.opts = opts;
1759 fn = git_config_include;
1760 data = &inc;
1761 }
1762
1763 /*
1764 * If we have a specific filename, use it. Otherwise, follow the
1765 * regular lookup sequence.
1766 */
1767 if (config_source && config_source->use_stdin)
1768 return git_config_from_stdin(fn, data);
1769 else if (config_source && config_source->file)
1770 return git_config_from_file(fn, config_source->file, data);
1771 else if (config_source && config_source->blob)
1772 return git_config_from_blob_ref(fn, config_source->blob, data);
1773
1774 return do_git_config_sequence(opts, fn, data);
1775 }
1776
1777 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1778 {
1779 int i, value_index;
1780 struct string_list *values;
1781 struct config_set_element *entry;
1782 struct configset_list *list = &cs->list;
1783
1784 for (i = 0; i < list->nr; i++) {
1785 entry = list->items[i].e;
1786 value_index = list->items[i].value_index;
1787 values = &entry->value_list;
1788
1789 current_config_kvi = values->items[value_index].util;
1790
1791 if (fn(entry->key, values->items[value_index].string, data) < 0)
1792 git_die_config_linenr(entry->key,
1793 current_config_kvi->filename,
1794 current_config_kvi->linenr);
1795
1796 current_config_kvi = NULL;
1797 }
1798 }
1799
1800 void read_early_config(config_fn_t cb, void *data)
1801 {
1802 struct config_options opts = {0};
1803 struct strbuf commondir = STRBUF_INIT;
1804 struct strbuf gitdir = STRBUF_INIT;
1805
1806 opts.respect_includes = 1;
1807
1808 if (have_git_dir()) {
1809 opts.commondir = get_git_common_dir();
1810 opts.git_dir = get_git_dir();
1811 /*
1812 * When setup_git_directory() was not yet asked to discover the
1813 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1814 * is any repository config we should use (but unlike
1815 * setup_git_directory_gently(), no global state is changed, most
1816 * notably, the current working directory is still the same after the
1817 * call).
1818 */
1819 } else if (!discover_git_directory(&commondir, &gitdir)) {
1820 opts.commondir = commondir.buf;
1821 opts.git_dir = gitdir.buf;
1822 }
1823
1824 config_with_options(cb, data, NULL, &opts);
1825
1826 strbuf_release(&commondir);
1827 strbuf_release(&gitdir);
1828 }
1829
1830 /*
1831 * Read config but only enumerate system and global settings.
1832 * Omit any repo-local, worktree-local, or command-line settings.
1833 */
1834 void read_very_early_config(config_fn_t cb, void *data)
1835 {
1836 struct config_options opts = { 0 };
1837
1838 opts.respect_includes = 1;
1839 opts.ignore_repo = 1;
1840 opts.ignore_worktree = 1;
1841 opts.ignore_cmdline = 1;
1842 opts.system_gently = 1;
1843
1844 config_with_options(cb, data, NULL, &opts);
1845 }
1846
1847 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1848 {
1849 struct config_set_element k;
1850 struct config_set_element *found_entry;
1851 char *normalized_key;
1852 /*
1853 * `key` may come from the user, so normalize it before using it
1854 * for querying entries from the hashmap.
1855 */
1856 if (git_config_parse_key(key, &normalized_key, NULL))
1857 return NULL;
1858
1859 hashmap_entry_init(&k, strhash(normalized_key));
1860 k.key = normalized_key;
1861 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1862 free(normalized_key);
1863 return found_entry;
1864 }
1865
1866 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1867 {
1868 struct config_set_element *e;
1869 struct string_list_item *si;
1870 struct configset_list_item *l_item;
1871 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1872
1873 e = configset_find_element(cs, key);
1874 /*
1875 * Since the keys are being fed by git_config*() callback mechanism, they
1876 * are already normalized. So simply add them without any further munging.
1877 */
1878 if (!e) {
1879 e = xmalloc(sizeof(*e));
1880 hashmap_entry_init(e, strhash(key));
1881 e->key = xstrdup(key);
1882 string_list_init(&e->value_list, 1);
1883 hashmap_add(&cs->config_hash, e);
1884 }
1885 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1886
1887 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1888 l_item = &cs->list.items[cs->list.nr++];
1889 l_item->e = e;
1890 l_item->value_index = e->value_list.nr - 1;
1891
1892 if (!cf)
1893 BUG("configset_add_value has no source");
1894 if (cf->name) {
1895 kv_info->filename = strintern(cf->name);
1896 kv_info->linenr = cf->linenr;
1897 kv_info->origin_type = cf->origin_type;
1898 } else {
1899 /* for values read from `git_config_from_parameters()` */
1900 kv_info->filename = NULL;
1901 kv_info->linenr = -1;
1902 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1903 }
1904 kv_info->scope = current_parsing_scope;
1905 si->util = kv_info;
1906
1907 return 0;
1908 }
1909
1910 static int config_set_element_cmp(const void *unused_cmp_data,
1911 const void *entry,
1912 const void *entry_or_key,
1913 const void *unused_keydata)
1914 {
1915 const struct config_set_element *e1 = entry;
1916 const struct config_set_element *e2 = entry_or_key;
1917
1918 return strcmp(e1->key, e2->key);
1919 }
1920
1921 void git_configset_init(struct config_set *cs)
1922 {
1923 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1924 cs->hash_initialized = 1;
1925 cs->list.nr = 0;
1926 cs->list.alloc = 0;
1927 cs->list.items = NULL;
1928 }
1929
1930 void git_configset_clear(struct config_set *cs)
1931 {
1932 struct config_set_element *entry;
1933 struct hashmap_iter iter;
1934 if (!cs->hash_initialized)
1935 return;
1936
1937 hashmap_iter_init(&cs->config_hash, &iter);
1938 while ((entry = hashmap_iter_next(&iter))) {
1939 free(entry->key);
1940 string_list_clear(&entry->value_list, 1);
1941 }
1942 hashmap_free(&cs->config_hash, 1);
1943 cs->hash_initialized = 0;
1944 free(cs->list.items);
1945 cs->list.nr = 0;
1946 cs->list.alloc = 0;
1947 cs->list.items = NULL;
1948 }
1949
1950 static int config_set_callback(const char *key, const char *value, void *cb)
1951 {
1952 struct config_set *cs = cb;
1953 configset_add_value(cs, key, value);
1954 return 0;
1955 }
1956
1957 int git_configset_add_file(struct config_set *cs, const char *filename)
1958 {
1959 return git_config_from_file(config_set_callback, filename, cs);
1960 }
1961
1962 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1963 {
1964 const struct string_list *values = NULL;
1965 /*
1966 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1967 * queried key in the files of the configset, the value returned will be the last
1968 * value in the value list for that key.
1969 */
1970 values = git_configset_get_value_multi(cs, key);
1971
1972 if (!values)
1973 return 1;
1974 assert(values->nr > 0);
1975 *value = values->items[values->nr - 1].string;
1976 return 0;
1977 }
1978
1979 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1980 {
1981 struct config_set_element *e = configset_find_element(cs, key);
1982 return e ? &e->value_list : NULL;
1983 }
1984
1985 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1986 {
1987 const char *value;
1988 if (!git_configset_get_value(cs, key, &value))
1989 return git_config_string(dest, key, value);
1990 else
1991 return 1;
1992 }
1993
1994 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1995 {
1996 return git_configset_get_string_const(cs, key, (const char **)dest);
1997 }
1998
1999 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
2000 {
2001 const char *value;
2002 if (!git_configset_get_value(cs, key, &value)) {
2003 *dest = git_config_int(key, value);
2004 return 0;
2005 } else
2006 return 1;
2007 }
2008
2009 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
2010 {
2011 const char *value;
2012 if (!git_configset_get_value(cs, key, &value)) {
2013 *dest = git_config_ulong(key, value);
2014 return 0;
2015 } else
2016 return 1;
2017 }
2018
2019 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
2020 {
2021 const char *value;
2022 if (!git_configset_get_value(cs, key, &value)) {
2023 *dest = git_config_bool(key, value);
2024 return 0;
2025 } else
2026 return 1;
2027 }
2028
2029 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
2030 int *is_bool, int *dest)
2031 {
2032 const char *value;
2033 if (!git_configset_get_value(cs, key, &value)) {
2034 *dest = git_config_bool_or_int(key, value, is_bool);
2035 return 0;
2036 } else
2037 return 1;
2038 }
2039
2040 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
2041 {
2042 const char *value;
2043 if (!git_configset_get_value(cs, key, &value)) {
2044 *dest = git_parse_maybe_bool(value);
2045 if (*dest == -1)
2046 return -1;
2047 return 0;
2048 } else
2049 return 1;
2050 }
2051
2052 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
2053 {
2054 const char *value;
2055 if (!git_configset_get_value(cs, key, &value))
2056 return git_config_pathname(dest, key, value);
2057 else
2058 return 1;
2059 }
2060
2061 /* Functions use to read configuration from a repository */
2062 static void repo_read_config(struct repository *repo)
2063 {
2064 struct config_options opts = { 0 };
2065
2066 opts.respect_includes = 1;
2067 opts.commondir = repo->commondir;
2068 opts.git_dir = repo->gitdir;
2069
2070 if (!repo->config)
2071 repo->config = xcalloc(1, sizeof(struct config_set));
2072 else
2073 git_configset_clear(repo->config);
2074
2075 git_configset_init(repo->config);
2076
2077 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
2078 /*
2079 * config_with_options() normally returns only
2080 * zero, as most errors are fatal, and
2081 * non-fatal potential errors are guarded by "if"
2082 * statements that are entered only when no error is
2083 * possible.
2084 *
2085 * If we ever encounter a non-fatal error, it means
2086 * something went really wrong and we should stop
2087 * immediately.
2088 */
2089 die(_("unknown error occurred while reading the configuration files"));
2090 }
2091
2092 static void git_config_check_init(struct repository *repo)
2093 {
2094 if (repo->config && repo->config->hash_initialized)
2095 return;
2096 repo_read_config(repo);
2097 }
2098
2099 static void repo_config_clear(struct repository *repo)
2100 {
2101 if (!repo->config || !repo->config->hash_initialized)
2102 return;
2103 git_configset_clear(repo->config);
2104 }
2105
2106 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2107 {
2108 git_config_check_init(repo);
2109 configset_iter(repo->config, fn, data);
2110 }
2111
2112 int repo_config_get_value(struct repository *repo,
2113 const char *key, const char **value)
2114 {
2115 git_config_check_init(repo);
2116 return git_configset_get_value(repo->config, key, value);
2117 }
2118
2119 const struct string_list *repo_config_get_value_multi(struct repository *repo,
2120 const char *key)
2121 {
2122 git_config_check_init(repo);
2123 return git_configset_get_value_multi(repo->config, key);
2124 }
2125
2126 int repo_config_get_string_const(struct repository *repo,
2127 const char *key, const char **dest)
2128 {
2129 int ret;
2130 git_config_check_init(repo);
2131 ret = git_configset_get_string_const(repo->config, key, dest);
2132 if (ret < 0)
2133 git_die_config(key, NULL);
2134 return ret;
2135 }
2136
2137 int repo_config_get_string(struct repository *repo,
2138 const char *key, char **dest)
2139 {
2140 git_config_check_init(repo);
2141 return repo_config_get_string_const(repo, key, (const char **)dest);
2142 }
2143
2144 int repo_config_get_int(struct repository *repo,
2145 const char *key, int *dest)
2146 {
2147 git_config_check_init(repo);
2148 return git_configset_get_int(repo->config, key, dest);
2149 }
2150
2151 int repo_config_get_ulong(struct repository *repo,
2152 const char *key, unsigned long *dest)
2153 {
2154 git_config_check_init(repo);
2155 return git_configset_get_ulong(repo->config, key, dest);
2156 }
2157
2158 int repo_config_get_bool(struct repository *repo,
2159 const char *key, int *dest)
2160 {
2161 git_config_check_init(repo);
2162 return git_configset_get_bool(repo->config, key, dest);
2163 }
2164
2165 int repo_config_get_bool_or_int(struct repository *repo,
2166 const char *key, int *is_bool, int *dest)
2167 {
2168 git_config_check_init(repo);
2169 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2170 }
2171
2172 int repo_config_get_maybe_bool(struct repository *repo,
2173 const char *key, int *dest)
2174 {
2175 git_config_check_init(repo);
2176 return git_configset_get_maybe_bool(repo->config, key, dest);
2177 }
2178
2179 int repo_config_get_pathname(struct repository *repo,
2180 const char *key, const char **dest)
2181 {
2182 int ret;
2183 git_config_check_init(repo);
2184 ret = git_configset_get_pathname(repo->config, key, dest);
2185 if (ret < 0)
2186 git_die_config(key, NULL);
2187 return ret;
2188 }
2189
2190 /* Functions used historically to read configuration from 'the_repository' */
2191 void git_config(config_fn_t fn, void *data)
2192 {
2193 repo_config(the_repository, fn, data);
2194 }
2195
2196 void git_config_clear(void)
2197 {
2198 repo_config_clear(the_repository);
2199 }
2200
2201 int git_config_get_value(const char *key, const char **value)
2202 {
2203 return repo_config_get_value(the_repository, key, value);
2204 }
2205
2206 const struct string_list *git_config_get_value_multi(const char *key)
2207 {
2208 return repo_config_get_value_multi(the_repository, key);
2209 }
2210
2211 int git_config_get_string_const(const char *key, const char **dest)
2212 {
2213 return repo_config_get_string_const(the_repository, key, dest);
2214 }
2215
2216 int git_config_get_string(const char *key, char **dest)
2217 {
2218 return repo_config_get_string(the_repository, key, dest);
2219 }
2220
2221 int git_config_get_int(const char *key, int *dest)
2222 {
2223 return repo_config_get_int(the_repository, key, dest);
2224 }
2225
2226 int git_config_get_ulong(const char *key, unsigned long *dest)
2227 {
2228 return repo_config_get_ulong(the_repository, key, dest);
2229 }
2230
2231 int git_config_get_bool(const char *key, int *dest)
2232 {
2233 return repo_config_get_bool(the_repository, key, dest);
2234 }
2235
2236 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2237 {
2238 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2239 }
2240
2241 int git_config_get_maybe_bool(const char *key, int *dest)
2242 {
2243 return repo_config_get_maybe_bool(the_repository, key, dest);
2244 }
2245
2246 int git_config_get_pathname(const char *key, const char **dest)
2247 {
2248 return repo_config_get_pathname(the_repository, key, dest);
2249 }
2250
2251 int git_config_get_expiry(const char *key, const char **output)
2252 {
2253 int ret = git_config_get_string_const(key, output);
2254 if (ret)
2255 return ret;
2256 if (strcmp(*output, "now")) {
2257 timestamp_t now = approxidate("now");
2258 if (approxidate(*output) >= now)
2259 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2260 }
2261 return ret;
2262 }
2263
2264 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2265 {
2266 char *expiry_string;
2267 intmax_t days;
2268 timestamp_t when;
2269
2270 if (git_config_get_string(key, &expiry_string))
2271 return 1; /* no such thing */
2272
2273 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2274 const int scale = 86400;
2275 *expiry = now - days * scale;
2276 return 0;
2277 }
2278
2279 if (!parse_expiry_date(expiry_string, &when)) {
2280 *expiry = when;
2281 return 0;
2282 }
2283 return -1; /* thing exists but cannot be parsed */
2284 }
2285
2286 int git_config_get_split_index(void)
2287 {
2288 int val;
2289
2290 if (!git_config_get_maybe_bool("core.splitindex", &val))
2291 return val;
2292
2293 return -1; /* default value */
2294 }
2295
2296 int git_config_get_max_percent_split_change(void)
2297 {
2298 int val = -1;
2299
2300 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2301 if (0 <= val && val <= 100)
2302 return val;
2303
2304 return error(_("splitIndex.maxPercentChange value '%d' "
2305 "should be between 0 and 100"), val);
2306 }
2307
2308 return -1; /* default value */
2309 }
2310
2311 int git_config_get_fsmonitor(void)
2312 {
2313 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2314 core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
2315
2316 if (core_fsmonitor && !*core_fsmonitor)
2317 core_fsmonitor = NULL;
2318
2319 if (core_fsmonitor)
2320 return 1;
2321
2322 return 0;
2323 }
2324
2325 int git_config_get_index_threads(int *dest)
2326 {
2327 int is_bool, val;
2328
2329 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2330 if (val) {
2331 *dest = val;
2332 return 0;
2333 }
2334
2335 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2336 if (is_bool)
2337 *dest = val ? 0 : 1;
2338 else
2339 *dest = val;
2340 return 0;
2341 }
2342
2343 return 1;
2344 }
2345
2346 NORETURN
2347 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2348 {
2349 if (!filename)
2350 die(_("unable to parse '%s' from command-line config"), key);
2351 else
2352 die(_("bad config variable '%s' in file '%s' at line %d"),
2353 key, filename, linenr);
2354 }
2355
2356 NORETURN __attribute__((format(printf, 2, 3)))
2357 void git_die_config(const char *key, const char *err, ...)
2358 {
2359 const struct string_list *values;
2360 struct key_value_info *kv_info;
2361
2362 if (err) {
2363 va_list params;
2364 va_start(params, err);
2365 vreportf("error: ", err, params);
2366 va_end(params);
2367 }
2368 values = git_config_get_value_multi(key);
2369 kv_info = values->items[values->nr - 1].util;
2370 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2371 }
2372
2373 /*
2374 * Find all the stuff for git_config_set() below.
2375 */
2376
2377 struct config_store_data {
2378 int baselen;
2379 char *key;
2380 int do_not_match;
2381 regex_t *value_regex;
2382 int multi_replace;
2383 struct {
2384 size_t begin, end;
2385 enum config_event_t type;
2386 int is_keys_section;
2387 } *parsed;
2388 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2389 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2390 };
2391
2392 static void config_store_data_clear(struct config_store_data *store)
2393 {
2394 free(store->key);
2395 if (store->value_regex != NULL &&
2396 store->value_regex != CONFIG_REGEX_NONE) {
2397 regfree(store->value_regex);
2398 free(store->value_regex);
2399 }
2400 free(store->parsed);
2401 free(store->seen);
2402 memset(store, 0, sizeof(*store));
2403 }
2404
2405 static int matches(const char *key, const char *value,
2406 const struct config_store_data *store)
2407 {
2408 if (strcmp(key, store->key))
2409 return 0; /* not ours */
2410 if (!store->value_regex)
2411 return 1; /* always matches */
2412 if (store->value_regex == CONFIG_REGEX_NONE)
2413 return 0; /* never matches */
2414
2415 return store->do_not_match ^
2416 (value && !regexec(store->value_regex, value, 0, NULL, 0));
2417 }
2418
2419 static int store_aux_event(enum config_event_t type,
2420 size_t begin, size_t end, void *data)
2421 {
2422 struct config_store_data *store = data;
2423
2424 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2425 store->parsed[store->parsed_nr].begin = begin;
2426 store->parsed[store->parsed_nr].end = end;
2427 store->parsed[store->parsed_nr].type = type;
2428
2429 if (type == CONFIG_EVENT_SECTION) {
2430 int (*cmpfn)(const char *, const char *, size_t);
2431
2432 if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
2433 return error(_("invalid section name '%s'"), cf->var.buf);
2434
2435 if (cf->subsection_case_sensitive)
2436 cmpfn = strncasecmp;
2437 else
2438 cmpfn = strncmp;
2439
2440 /* Is this the section we were looking for? */
2441 store->is_keys_section =
2442 store->parsed[store->parsed_nr].is_keys_section =
2443 cf->var.len - 1 == store->baselen &&
2444 !cmpfn(cf->var.buf, store->key, store->baselen);
2445 if (store->is_keys_section) {
2446 store->section_seen = 1;
2447 ALLOC_GROW(store->seen, store->seen_nr + 1,
2448 store->seen_alloc);
2449 store->seen[store->seen_nr] = store->parsed_nr;
2450 }
2451 }
2452
2453 store->parsed_nr++;
2454
2455 return 0;
2456 }
2457
2458 static int store_aux(const char *key, const char *value, void *cb)
2459 {
2460 struct config_store_data *store = cb;
2461
2462 if (store->key_seen) {
2463 if (matches(key, value, store)) {
2464 if (store->seen_nr == 1 && store->multi_replace == 0) {
2465 warning(_("%s has multiple values"), key);
2466 }
2467
2468 ALLOC_GROW(store->seen, store->seen_nr + 1,
2469 store->seen_alloc);
2470
2471 store->seen[store->seen_nr] = store->parsed_nr;
2472 store->seen_nr++;
2473 }
2474 } else if (store->is_keys_section) {
2475 /*
2476 * Do not increment matches yet: this may not be a match, but we
2477 * are in the desired section.
2478 */
2479 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2480 store->seen[store->seen_nr] = store->parsed_nr;
2481 store->section_seen = 1;
2482
2483 if (matches(key, value, store)) {
2484 store->seen_nr++;
2485 store->key_seen = 1;
2486 }
2487 }
2488
2489 return 0;
2490 }
2491
2492 static int write_error(const char *filename)
2493 {
2494 error(_("failed to write new configuration file %s"), filename);
2495
2496 /* Same error code as "failed to rename". */
2497 return 4;
2498 }
2499
2500 static struct strbuf store_create_section(const char *key,
2501 const struct config_store_data *store)
2502 {
2503 const char *dot;
2504 int i;
2505 struct strbuf sb = STRBUF_INIT;
2506
2507 dot = memchr(key, '.', store->baselen);
2508 if (dot) {
2509 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2510 for (i = dot - key + 1; i < store->baselen; i++) {
2511 if (key[i] == '"' || key[i] == '\\')
2512 strbuf_addch(&sb, '\\');
2513 strbuf_addch(&sb, key[i]);
2514 }
2515 strbuf_addstr(&sb, "\"]\n");
2516 } else {
2517 strbuf_addf(&sb, "[%.*s]\n", store->baselen, key);
2518 }
2519
2520 return sb;
2521 }
2522
2523 static ssize_t write_section(int fd, const char *key,
2524 const struct config_store_data *store)
2525 {
2526 struct strbuf sb = store_create_section(key, store);
2527 ssize_t ret;
2528
2529 ret = write_in_full(fd, sb.buf, sb.len);
2530 strbuf_release(&sb);
2531
2532 return ret;
2533 }
2534
2535 static ssize_t write_pair(int fd, const char *key, const char *value,
2536 const struct config_store_data *store)
2537 {
2538 int i;
2539 ssize_t ret;
2540 int length = strlen(key + store->baselen + 1);
2541 const char *quote = "";
2542 struct strbuf sb = STRBUF_INIT;
2543
2544 /*
2545 * Check to see if the value needs to be surrounded with a dq pair.
2546 * Note that problematic characters are always backslash-quoted; this
2547 * check is about not losing leading or trailing SP and strings that
2548 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2549 * configuration parser.
2550 */
2551 if (value[0] == ' ')
2552 quote = "\"";
2553 for (i = 0; value[i]; i++)
2554 if (value[i] == ';' || value[i] == '#')
2555 quote = "\"";
2556 if (i && value[i - 1] == ' ')
2557 quote = "\"";
2558
2559 strbuf_addf(&sb, "\t%.*s = %s",
2560 length, key + store->baselen + 1, quote);
2561
2562 for (i = 0; value[i]; i++)
2563 switch (value[i]) {
2564 case '\n':
2565 strbuf_addstr(&sb, "\\n");
2566 break;
2567 case '\t':
2568 strbuf_addstr(&sb, "\\t");
2569 break;
2570 case '"':
2571 case '\\':
2572 strbuf_addch(&sb, '\\');
2573 /* fallthrough */
2574 default:
2575 strbuf_addch(&sb, value[i]);
2576 break;
2577 }
2578 strbuf_addf(&sb, "%s\n", quote);
2579
2580 ret = write_in_full(fd, sb.buf, sb.len);
2581 strbuf_release(&sb);
2582
2583 return ret;
2584 }
2585
2586 /*
2587 * If we are about to unset the last key(s) in a section, and if there are
2588 * no comments surrounding (or included in) the section, we will want to
2589 * extend begin/end to remove the entire section.
2590 *
2591 * Note: the parameter `seen_ptr` points to the index into the store.seen
2592 * array. * This index may be incremented if a section has more than one
2593 * entry (which all are to be removed).
2594 */
2595 static void maybe_remove_section(struct config_store_data *store,
2596 size_t *begin_offset, size_t *end_offset,
2597 int *seen_ptr)
2598 {
2599 size_t begin;
2600 int i, seen, section_seen = 0;
2601
2602 /*
2603 * First, ensure that this is the first key, and that there are no
2604 * comments before the entry nor before the section header.
2605 */
2606 seen = *seen_ptr;
2607 for (i = store->seen[seen]; i > 0; i--) {
2608 enum config_event_t type = store->parsed[i - 1].type;
2609
2610 if (type == CONFIG_EVENT_COMMENT)
2611 /* There is a comment before this entry or section */
2612 return;
2613 if (type == CONFIG_EVENT_ENTRY) {
2614 if (!section_seen)
2615 /* This is not the section's first entry. */
2616 return;
2617 /* We encountered no comment before the section. */
2618 break;
2619 }
2620 if (type == CONFIG_EVENT_SECTION) {
2621 if (!store->parsed[i - 1].is_keys_section)
2622 break;
2623 section_seen = 1;
2624 }
2625 }
2626 begin = store->parsed[i].begin;
2627
2628 /*
2629 * Next, make sure that we are removing he last key(s) in the section,
2630 * and that there are no comments that are possibly about the current
2631 * section.
2632 */
2633 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
2634 enum config_event_t type = store->parsed[i].type;
2635
2636 if (type == CONFIG_EVENT_COMMENT)
2637 return;
2638 if (type == CONFIG_EVENT_SECTION) {
2639 if (store->parsed[i].is_keys_section)
2640 continue;
2641 break;
2642 }
2643 if (type == CONFIG_EVENT_ENTRY) {
2644 if (++seen < store->seen_nr &&
2645 i == store->seen[seen])
2646 /* We want to remove this entry, too */
2647 continue;
2648 /* There is another entry in this section. */
2649 return;
2650 }
2651 }
2652
2653 /*
2654 * We are really removing the last entry/entries from this section, and
2655 * there are no enclosed or surrounding comments. Remove the entire,
2656 * now-empty section.
2657 */
2658 *seen_ptr = seen;
2659 *begin_offset = begin;
2660 if (i < store->parsed_nr)
2661 *end_offset = store->parsed[i].begin;
2662 else
2663 *end_offset = store->parsed[store->parsed_nr - 1].end;
2664 }
2665
2666 int git_config_set_in_file_gently(const char *config_filename,
2667 const char *key, const char *value)
2668 {
2669 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2670 }
2671
2672 void git_config_set_in_file(const char *config_filename,
2673 const char *key, const char *value)
2674 {
2675 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2676 }
2677
2678 int git_config_set_gently(const char *key, const char *value)
2679 {
2680 return git_config_set_multivar_gently(key, value, NULL, 0);
2681 }
2682
2683 void git_config_set(const char *key, const char *value)
2684 {
2685 git_config_set_multivar(key, value, NULL, 0);
2686
2687 trace2_cmd_set_config(key, value);
2688 }
2689
2690 /*
2691 * If value==NULL, unset in (remove from) config,
2692 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2693 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2694 * (only add a new one)
2695 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2696 * else all matching key/values (regardless how many) are removed,
2697 * before the new pair is written.
2698 *
2699 * Returns 0 on success.
2700 *
2701 * This function does this:
2702 *
2703 * - it locks the config file by creating ".git/config.lock"
2704 *
2705 * - it then parses the config using store_aux() as validator to find
2706 * the position on the key/value pair to replace. If it is to be unset,
2707 * it must be found exactly once.
2708 *
2709 * - the config file is mmap()ed and the part before the match (if any) is
2710 * written to the lock file, then the changed part and the rest.
2711 *
2712 * - the config file is removed and the lock file rename()d to it.
2713 *
2714 */
2715 int git_config_set_multivar_in_file_gently(const char *config_filename,
2716 const char *key, const char *value,
2717 const char *value_regex,
2718 int multi_replace)
2719 {
2720 int fd = -1, in_fd = -1;
2721 int ret;
2722 struct lock_file lock = LOCK_INIT;
2723 char *filename_buf = NULL;
2724 char *contents = NULL;
2725 size_t contents_sz;
2726 struct config_store_data store;
2727
2728 memset(&store, 0, sizeof(store));
2729
2730 /* parse-key returns negative; flip the sign to feed exit(3) */
2731 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2732 if (ret)
2733 goto out_free;
2734
2735 store.multi_replace = multi_replace;
2736
2737 if (!config_filename)
2738 config_filename = filename_buf = git_pathdup("config");
2739
2740 /*
2741 * The lock serves a purpose in addition to locking: the new
2742 * contents of .git/config will be written into it.
2743 */
2744 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2745 if (fd < 0) {
2746 error_errno(_("could not lock config file %s"), config_filename);
2747 ret = CONFIG_NO_LOCK;
2748 goto out_free;
2749 }
2750
2751 /*
2752 * If .git/config does not exist yet, write a minimal version.
2753 */
2754 in_fd = open(config_filename, O_RDONLY);
2755 if ( in_fd < 0 ) {
2756 if ( ENOENT != errno ) {
2757 error_errno(_("opening %s"), config_filename);
2758 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2759 goto out_free;
2760 }
2761 /* if nothing to unset, error out */
2762 if (value == NULL) {
2763 ret = CONFIG_NOTHING_SET;
2764 goto out_free;
2765 }
2766
2767 free(store.key);
2768 store.key = xstrdup(key);
2769 if (write_section(fd, key, &store) < 0 ||
2770 write_pair(fd, key, value, &store) < 0)
2771 goto write_err_out;
2772 } else {
2773 struct stat st;
2774 size_t copy_begin, copy_end;
2775 int i, new_line = 0;
2776 struct config_options opts;
2777
2778 if (value_regex == NULL)
2779 store.value_regex = NULL;
2780 else if (value_regex == CONFIG_REGEX_NONE)
2781 store.value_regex = CONFIG_REGEX_NONE;
2782 else {
2783 if (value_regex[0] == '!') {
2784 store.do_not_match = 1;
2785 value_regex++;
2786 } else
2787 store.do_not_match = 0;
2788
2789 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2790 if (regcomp(store.value_regex, value_regex,
2791 REG_EXTENDED)) {
2792 error(_("invalid pattern: %s"), value_regex);
2793 FREE_AND_NULL(store.value_regex);
2794 ret = CONFIG_INVALID_PATTERN;
2795 goto out_free;
2796 }
2797 }
2798
2799 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
2800 store.parsed[0].end = 0;
2801
2802 memset(&opts, 0, sizeof(opts));
2803 opts.event_fn = store_aux_event;
2804 opts.event_fn_data = &store;
2805
2806 /*
2807 * After this, store.parsed will contain offsets of all the
2808 * parsed elements, and store.seen will contain a list of
2809 * matches, as indices into store.parsed.
2810 *
2811 * As a side effect, we make sure to transform only a valid
2812 * existing config file.
2813 */
2814 if (git_config_from_file_with_options(store_aux,
2815 config_filename,
2816 &store, &opts)) {
2817 error(_("invalid config file %s"), config_filename);
2818 ret = CONFIG_INVALID_FILE;
2819 goto out_free;
2820 }
2821
2822 /* if nothing to unset, or too many matches, error out */
2823 if ((store.seen_nr == 0 && value == NULL) ||
2824 (store.seen_nr > 1 && multi_replace == 0)) {
2825 ret = CONFIG_NOTHING_SET;
2826 goto out_free;
2827 }
2828
2829 if (fstat(in_fd, &st) == -1) {
2830 error_errno(_("fstat on %s failed"), config_filename);
2831 ret = CONFIG_INVALID_FILE;
2832 goto out_free;
2833 }
2834
2835 contents_sz = xsize_t(st.st_size);
2836 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2837 MAP_PRIVATE, in_fd, 0);
2838 if (contents == MAP_FAILED) {
2839 if (errno == ENODEV && S_ISDIR(st.st_mode))
2840 errno = EISDIR;
2841 error_errno(_("unable to mmap '%s'"), config_filename);
2842 ret = CONFIG_INVALID_FILE;
2843 contents = NULL;
2844 goto out_free;
2845 }
2846 close(in_fd);
2847 in_fd = -1;
2848
2849 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2850 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
2851 ret = CONFIG_NO_WRITE;
2852 goto out_free;
2853 }
2854
2855 if (store.seen_nr == 0) {
2856 if (!store.seen_alloc) {
2857 /* Did not see key nor section */
2858 ALLOC_GROW(store.seen, 1, store.seen_alloc);
2859 store.seen[0] = store.parsed_nr
2860 - !!store.parsed_nr;
2861 }
2862 store.seen_nr = 1;
2863 }
2864
2865 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
2866 size_t replace_end;
2867 int j = store.seen[i];
2868
2869 new_line = 0;
2870 if (!store.key_seen) {
2871 copy_end = store.parsed[j].end;
2872 /* include '\n' when copying section header */
2873 if (copy_end > 0 && copy_end < contents_sz &&
2874 contents[copy_end - 1] != '\n' &&
2875 contents[copy_end] == '\n')
2876 copy_end++;
2877 replace_end = copy_end;
2878 } else {
2879 replace_end = store.parsed[j].end;
2880 copy_end = store.parsed[j].begin;
2881 if (!value)
2882 maybe_remove_section(&store,
2883 &copy_end,
2884 &replace_end, &i);
2885 /*
2886 * Swallow preceding white-space on the same
2887 * line.
2888 */
2889 while (copy_end > 0 ) {
2890 char c = contents[copy_end - 1];
2891
2892 if (isspace(c) && c != '\n')
2893 copy_end--;
2894 else
2895 break;
2896 }
2897 }
2898
2899 if (copy_end > 0 && contents[copy_end-1] != '\n')
2900 new_line = 1;
2901
2902 /* write the first part of the config */
2903 if (copy_end > copy_begin) {
2904 if (write_in_full(fd, contents + copy_begin,
2905 copy_end - copy_begin) < 0)
2906 goto write_err_out;
2907 if (new_line &&
2908 write_str_in_full(fd, "\n") < 0)
2909 goto write_err_out;
2910 }
2911 copy_begin = replace_end;
2912 }
2913
2914 /* write the pair (value == NULL means unset) */
2915 if (value != NULL) {
2916 if (!store.section_seen) {
2917 if (write_section(fd, key, &store) < 0)
2918 goto write_err_out;
2919 }
2920 if (write_pair(fd, key, value, &store) < 0)
2921 goto write_err_out;
2922 }
2923
2924 /* write the rest of the config */
2925 if (copy_begin < contents_sz)
2926 if (write_in_full(fd, contents + copy_begin,
2927 contents_sz - copy_begin) < 0)
2928 goto write_err_out;
2929
2930 munmap(contents, contents_sz);
2931 contents = NULL;
2932 }
2933
2934 if (commit_lock_file(&lock) < 0) {
2935 error_errno(_("could not write config file %s"), config_filename);
2936 ret = CONFIG_NO_WRITE;
2937 goto out_free;
2938 }
2939
2940 ret = 0;
2941
2942 /* Invalidate the config cache */
2943 git_config_clear();
2944
2945 out_free:
2946 rollback_lock_file(&lock);
2947 free(filename_buf);
2948 if (contents)
2949 munmap(contents, contents_sz);
2950 if (in_fd >= 0)
2951 close(in_fd);
2952 config_store_data_clear(&store);
2953 return ret;
2954
2955 write_err_out:
2956 ret = write_error(get_lock_file_path(&lock));
2957 goto out_free;
2958
2959 }
2960
2961 void git_config_set_multivar_in_file(const char *config_filename,
2962 const char *key, const char *value,
2963 const char *value_regex, int multi_replace)
2964 {
2965 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2966 value_regex, multi_replace))
2967 return;
2968 if (value)
2969 die(_("could not set '%s' to '%s'"), key, value);
2970 else
2971 die(_("could not unset '%s'"), key);
2972 }
2973
2974 int git_config_set_multivar_gently(const char *key, const char *value,
2975 const char *value_regex, int multi_replace)
2976 {
2977 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2978 multi_replace);
2979 }
2980
2981 void git_config_set_multivar(const char *key, const char *value,
2982 const char *value_regex, int multi_replace)
2983 {
2984 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2985 multi_replace);
2986 }
2987
2988 static int section_name_match (const char *buf, const char *name)
2989 {
2990 int i = 0, j = 0, dot = 0;
2991 if (buf[i] != '[')
2992 return 0;
2993 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2994 if (!dot && isspace(buf[i])) {
2995 dot = 1;
2996 if (name[j++] != '.')
2997 break;
2998 for (i++; isspace(buf[i]); i++)
2999 ; /* do nothing */
3000 if (buf[i] != '"')
3001 break;
3002 continue;
3003 }
3004 if (buf[i] == '\\' && dot)
3005 i++;
3006 else if (buf[i] == '"' && dot) {
3007 for (i++; isspace(buf[i]); i++)
3008 ; /* do_nothing */
3009 break;
3010 }
3011 if (buf[i] != name[j++])
3012 break;
3013 }
3014 if (buf[i] == ']' && name[j] == 0) {
3015 /*
3016 * We match, now just find the right length offset by
3017 * gobbling up any whitespace after it, as well
3018 */
3019 i++;
3020 for (; buf[i] && isspace(buf[i]); i++)
3021 ; /* do nothing */
3022 return i;
3023 }
3024 return 0;
3025 }
3026
3027 static int section_name_is_ok(const char *name)
3028 {
3029 /* Empty section names are bogus. */
3030 if (!*name)
3031 return 0;
3032
3033 /*
3034 * Before a dot, we must be alphanumeric or dash. After the first dot,
3035 * anything goes, so we can stop checking.
3036 */
3037 for (; *name && *name != '.'; name++)
3038 if (*name != '-' && !isalnum(*name))
3039 return 0;
3040 return 1;
3041 }
3042
3043 /* if new_name == NULL, the section is removed instead */
3044 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3045 const char *old_name,
3046 const char *new_name, int copy)
3047 {
3048 int ret = 0, remove = 0;
3049 char *filename_buf = NULL;
3050 struct lock_file lock = LOCK_INIT;
3051 int out_fd;
3052 char buf[1024];
3053 FILE *config_file = NULL;
3054 struct stat st;
3055 struct strbuf copystr = STRBUF_INIT;
3056 struct config_store_data store;
3057
3058 memset(&store, 0, sizeof(store));
3059
3060 if (new_name && !section_name_is_ok(new_name)) {
3061 ret = error(_("invalid section name: %s"), new_name);
3062 goto out_no_rollback;
3063 }
3064
3065 if (!config_filename)
3066 config_filename = filename_buf = git_pathdup("config");
3067
3068 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3069 if (out_fd < 0) {
3070 ret = error(_("could not lock config file %s"), config_filename);
3071 goto out;
3072 }
3073
3074 if (!(config_file = fopen(config_filename, "rb"))) {
3075 ret = warn_on_fopen_errors(config_filename);
3076 if (ret)
3077 goto out;
3078 /* no config file means nothing to rename, no error */
3079 goto commit_and_out;
3080 }
3081
3082 if (fstat(fileno(config_file), &st) == -1) {
3083 ret = error_errno(_("fstat on %s failed"), config_filename);
3084 goto out;
3085 }
3086
3087 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3088 ret = error_errno(_("chmod on %s failed"),
3089 get_lock_file_path(&lock));
3090 goto out;
3091 }
3092
3093 while (fgets(buf, sizeof(buf), config_file)) {
3094 int i;
3095 int length;
3096 int is_section = 0;
3097 char *output = buf;
3098 for (i = 0; buf[i] && isspace(buf[i]); i++)
3099 ; /* do nothing */
3100 if (buf[i] == '[') {
3101 /* it's a section */
3102 int offset;
3103 is_section = 1;
3104
3105 /*
3106 * When encountering a new section under -c we
3107 * need to flush out any section we're already
3108 * coping and begin anew. There might be
3109 * multiple [branch "$name"] sections.
3110 */
3111 if (copystr.len > 0) {
3112 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3113 ret = write_error(get_lock_file_path(&lock));
3114 goto out;
3115 }
3116 strbuf_reset(&copystr);
3117 }
3118
3119 offset = section_name_match(&buf[i], old_name);
3120 if (offset > 0) {
3121 ret++;
3122 if (new_name == NULL) {
3123 remove = 1;
3124 continue;
3125 }
3126 store.baselen = strlen(new_name);
3127 if (!copy) {
3128 if (write_section(out_fd, new_name, &store) < 0) {
3129 ret = write_error(get_lock_file_path(&lock));
3130 goto out;
3131 }
3132 /*
3133 * We wrote out the new section, with
3134 * a newline, now skip the old
3135 * section's length
3136 */
3137 output += offset + i;
3138 if (strlen(output) > 0) {
3139 /*
3140 * More content means there's
3141 * a declaration to put on the
3142 * next line; indent with a
3143 * tab
3144 */
3145 output -= 1;
3146 output[0] = '\t';
3147 }
3148 } else {
3149 copystr = store_create_section(new_name, &store);
3150 }
3151 }
3152 remove = 0;
3153 }
3154 if (remove)
3155 continue;
3156 length = strlen(output);
3157
3158 if (!is_section && copystr.len > 0) {
3159 strbuf_add(&copystr, output, length);
3160 }
3161
3162 if (write_in_full(out_fd, output, length) < 0) {
3163 ret = write_error(get_lock_file_path(&lock));
3164 goto out;
3165 }
3166 }
3167
3168 /*
3169 * Copy a trailing section at the end of the config, won't be
3170 * flushed by the usual "flush because we have a new section
3171 * logic in the loop above.
3172 */
3173 if (copystr.len > 0) {
3174 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3175 ret = write_error(get_lock_file_path(&lock));
3176 goto out;
3177 }
3178 strbuf_reset(&copystr);
3179 }
3180
3181 fclose(config_file);
3182 config_file = NULL;
3183 commit_and_out:
3184 if (commit_lock_file(&lock) < 0)
3185 ret = error_errno(_("could not write config file %s"),
3186 config_filename);
3187 out:
3188 if (config_file)
3189 fclose(config_file);
3190 rollback_lock_file(&lock);
3191 out_no_rollback:
3192 free(filename_buf);
3193 config_store_data_clear(&store);
3194 return ret;
3195 }
3196
3197 int git_config_rename_section_in_file(const char *config_filename,
3198 const char *old_name, const char *new_name)
3199 {
3200 return git_config_copy_or_rename_section_in_file(config_filename,
3201 old_name, new_name, 0);
3202 }
3203
3204 int git_config_rename_section(const char *old_name, const char *new_name)
3205 {
3206 return git_config_rename_section_in_file(NULL, old_name, new_name);
3207 }
3208
3209 int git_config_copy_section_in_file(const char *config_filename,
3210 const char *old_name, const char *new_name)
3211 {
3212 return git_config_copy_or_rename_section_in_file(config_filename,
3213 old_name, new_name, 1);
3214 }
3215
3216 int git_config_copy_section(const char *old_name, const char *new_name)
3217 {
3218 return git_config_copy_section_in_file(NULL, old_name, new_name);
3219 }
3220
3221 /*
3222 * Call this to report error for your variable that should not
3223 * get a boolean value (i.e. "[my] var" means "true").
3224 */
3225 #undef config_error_nonbool
3226 int config_error_nonbool(const char *var)
3227 {
3228 return error(_("missing value for '%s'"), var);
3229 }
3230
3231 int parse_config_key(const char *var,
3232 const char *section,
3233 const char **subsection, int *subsection_len,
3234 const char **key)
3235 {
3236 const char *dot;
3237
3238 /* Does it start with "section." ? */
3239 if (!skip_prefix(var, section, &var) || *var != '.')
3240 return -1;
3241
3242 /*
3243 * Find the key; we don't know yet if we have a subsection, but we must
3244 * parse backwards from the end, since the subsection may have dots in
3245 * it, too.
3246 */
3247 dot = strrchr(var, '.');
3248 *key = dot + 1;
3249
3250 /* Did we have a subsection at all? */
3251 if (dot == var) {
3252 if (subsection) {
3253 *subsection = NULL;
3254 *subsection_len = 0;
3255 }
3256 }
3257 else {
3258 if (!subsection)
3259 return -1;
3260 *subsection = var + 1;
3261 *subsection_len = dot - *subsection;
3262 }
3263
3264 return 0;
3265 }
3266
3267 const char *current_config_origin_type(void)
3268 {
3269 int type;
3270 if (current_config_kvi)
3271 type = current_config_kvi->origin_type;
3272 else if(cf)
3273 type = cf->origin_type;
3274 else
3275 BUG("current_config_origin_type called outside config callback");
3276
3277 switch (type) {
3278 case CONFIG_ORIGIN_BLOB:
3279 return "blob";
3280 case CONFIG_ORIGIN_FILE:
3281 return "file";
3282 case CONFIG_ORIGIN_STDIN:
3283 return "standard input";
3284 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3285 return "submodule-blob";
3286 case CONFIG_ORIGIN_CMDLINE:
3287 return "command line";
3288 default:
3289 BUG("unknown config origin type");
3290 }
3291 }
3292
3293 const char *current_config_name(void)
3294 {
3295 const char *name;
3296 if (current_config_kvi)
3297 name = current_config_kvi->filename;
3298 else if (cf)
3299 name = cf->name;
3300 else
3301 BUG("current_config_name called outside config callback");
3302 return name ? name : "";
3303 }
3304
3305 enum config_scope current_config_scope(void)
3306 {
3307 if (current_config_kvi)
3308 return current_config_kvi->scope;
3309 else
3310 return current_parsing_scope;
3311 }
3312
3313 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3314 {
3315 int i;
3316
3317 for (i = 0; i < nr_mapping; i++) {
3318 const char *name = mapping[i];
3319
3320 if (name && !strcasecmp(var, name))
3321 return i;
3322 }
3323 return -1;
3324 }