Merge branch 'js/mingw-perl5lib'
[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
23 struct config_source {
24 struct config_source *prev;
25 union {
26 FILE *file;
27 struct config_buf {
28 const char *buf;
29 size_t len;
30 size_t pos;
31 } buf;
32 } u;
33 enum config_origin_type origin_type;
34 const char *name;
35 const char *path;
36 enum config_error_action default_error_action;
37 int linenr;
38 int eof;
39 struct strbuf value;
40 struct strbuf var;
41 unsigned subsection_case_sensitive : 1;
42
43 int (*do_fgetc)(struct config_source *c);
44 int (*do_ungetc)(int c, struct config_source *conf);
45 long (*do_ftell)(struct config_source *c);
46 };
47
48 /*
49 * These variables record the "current" config source, which
50 * can be accessed by parsing callbacks.
51 *
52 * The "cf" variable will be non-NULL only when we are actually parsing a real
53 * config source (file, blob, cmdline, etc).
54 *
55 * The "current_config_kvi" variable will be non-NULL only when we are feeding
56 * cached config from a configset into a callback.
57 *
58 * They should generally never be non-NULL at the same time. If they are both
59 * NULL, then we aren't parsing anything (and depending on the function looking
60 * at the variables, it's either a bug for it to be called in the first place,
61 * or it's a function which can be reused for non-config purposes, and should
62 * fall back to some sane behavior).
63 */
64 static struct config_source *cf;
65 static struct key_value_info *current_config_kvi;
66
67 /*
68 * Similar to the variables above, this gives access to the "scope" of the
69 * current value (repo, global, etc). For cached values, it can be found via
70 * the current_config_kvi as above. During parsing, the current value can be
71 * found in this variable. It's not part of "cf" because it transcends a single
72 * file (i.e., a file included from .git/config is still in "repo" scope).
73 */
74 static enum config_scope current_parsing_scope;
75
76 static int core_compression_seen;
77 static int pack_compression_seen;
78 static int zlib_compression_seen;
79
80 static int config_file_fgetc(struct config_source *conf)
81 {
82 return getc_unlocked(conf->u.file);
83 }
84
85 static int config_file_ungetc(int c, struct config_source *conf)
86 {
87 return ungetc(c, conf->u.file);
88 }
89
90 static long config_file_ftell(struct config_source *conf)
91 {
92 return ftell(conf->u.file);
93 }
94
95
96 static int config_buf_fgetc(struct config_source *conf)
97 {
98 if (conf->u.buf.pos < conf->u.buf.len)
99 return conf->u.buf.buf[conf->u.buf.pos++];
100
101 return EOF;
102 }
103
104 static int config_buf_ungetc(int c, struct config_source *conf)
105 {
106 if (conf->u.buf.pos > 0) {
107 conf->u.buf.pos--;
108 if (conf->u.buf.buf[conf->u.buf.pos] != c)
109 BUG("config_buf can only ungetc the same character");
110 return c;
111 }
112
113 return EOF;
114 }
115
116 static long config_buf_ftell(struct config_source *conf)
117 {
118 return conf->u.buf.pos;
119 }
120
121 #define MAX_INCLUDE_DEPTH 10
122 static const char include_depth_advice[] = N_(
123 "exceeded maximum include depth (%d) while including\n"
124 " %s\n"
125 "from\n"
126 " %s\n"
127 "This might be due to circular includes.");
128 static int handle_path_include(const char *path, struct config_include_data *inc)
129 {
130 int ret = 0;
131 struct strbuf buf = STRBUF_INIT;
132 char *expanded;
133
134 if (!path)
135 return config_error_nonbool("include.path");
136
137 expanded = expand_user_path(path, 0);
138 if (!expanded)
139 return error(_("could not expand include path '%s'"), path);
140 path = expanded;
141
142 /*
143 * Use an absolute path as-is, but interpret relative paths
144 * based on the including config file.
145 */
146 if (!is_absolute_path(path)) {
147 char *slash;
148
149 if (!cf || !cf->path)
150 return error(_("relative config includes must come from files"));
151
152 slash = find_last_dir_sep(cf->path);
153 if (slash)
154 strbuf_add(&buf, cf->path, slash - cf->path + 1);
155 strbuf_addstr(&buf, path);
156 path = buf.buf;
157 }
158
159 if (!access_or_die(path, R_OK, 0)) {
160 if (++inc->depth > MAX_INCLUDE_DEPTH)
161 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
162 !cf ? "<unknown>" :
163 cf->name ? cf->name :
164 "the command line");
165 ret = git_config_from_file(git_config_include, path, inc);
166 inc->depth--;
167 }
168 strbuf_release(&buf);
169 free(expanded);
170 return ret;
171 }
172
173 static int prepare_include_condition_pattern(struct strbuf *pat)
174 {
175 struct strbuf path = STRBUF_INIT;
176 char *expanded;
177 int prefix = 0;
178
179 expanded = expand_user_path(pat->buf, 1);
180 if (expanded) {
181 strbuf_reset(pat);
182 strbuf_addstr(pat, expanded);
183 free(expanded);
184 }
185
186 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
187 const char *slash;
188
189 if (!cf || !cf->path)
190 return error(_("relative config include "
191 "conditionals must come from files"));
192
193 strbuf_realpath(&path, cf->path, 1);
194 slash = find_last_dir_sep(path.buf);
195 if (!slash)
196 BUG("how is this possible?");
197 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
198 prefix = slash - path.buf + 1 /* slash */;
199 } else if (!is_absolute_path(pat->buf))
200 strbuf_insert(pat, 0, "**/", 3);
201
202 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
203 strbuf_addstr(pat, "**");
204
205 strbuf_release(&path);
206 return prefix;
207 }
208
209 static int include_by_gitdir(const struct config_options *opts,
210 const char *cond, size_t cond_len, int icase)
211 {
212 struct strbuf text = STRBUF_INIT;
213 struct strbuf pattern = STRBUF_INIT;
214 int ret = 0, prefix;
215 const char *git_dir;
216 int already_tried_absolute = 0;
217
218 if (opts->git_dir)
219 git_dir = opts->git_dir;
220 else
221 goto done;
222
223 strbuf_realpath(&text, git_dir, 1);
224 strbuf_add(&pattern, cond, cond_len);
225 prefix = prepare_include_condition_pattern(&pattern);
226
227 again:
228 if (prefix < 0)
229 goto done;
230
231 if (prefix > 0) {
232 /*
233 * perform literal matching on the prefix part so that
234 * any wildcard character in it can't create side effects.
235 */
236 if (text.len < prefix)
237 goto done;
238 if (!icase && strncmp(pattern.buf, text.buf, prefix))
239 goto done;
240 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
241 goto done;
242 }
243
244 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
245 icase ? WM_CASEFOLD : 0);
246
247 if (!ret && !already_tried_absolute) {
248 /*
249 * We've tried e.g. matching gitdir:~/work, but if
250 * ~/work is a symlink to /mnt/storage/work
251 * strbuf_realpath() will expand it, so the rule won't
252 * match. Let's match against a
253 * strbuf_add_absolute_path() version of the path,
254 * which'll do the right thing
255 */
256 strbuf_reset(&text);
257 strbuf_add_absolute_path(&text, git_dir);
258 already_tried_absolute = 1;
259 goto again;
260 }
261 done:
262 strbuf_release(&pattern);
263 strbuf_release(&text);
264 return ret;
265 }
266
267 static int include_condition_is_true(const struct config_options *opts,
268 const char *cond, size_t cond_len)
269 {
270
271 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
272 return include_by_gitdir(opts, cond, cond_len, 0);
273 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
274 return include_by_gitdir(opts, cond, cond_len, 1);
275
276 /* unknown conditionals are always false */
277 return 0;
278 }
279
280 int git_config_include(const char *var, const char *value, void *data)
281 {
282 struct config_include_data *inc = data;
283 const char *cond, *key;
284 int cond_len;
285 int ret;
286
287 /*
288 * Pass along all values, including "include" directives; this makes it
289 * possible to query information on the includes themselves.
290 */
291 ret = inc->fn(var, value, inc->data);
292 if (ret < 0)
293 return ret;
294
295 if (!strcmp(var, "include.path"))
296 ret = handle_path_include(value, inc);
297
298 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
299 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
300 !strcmp(key, "path"))
301 ret = handle_path_include(value, inc);
302
303 return ret;
304 }
305
306 void git_config_push_parameter(const char *text)
307 {
308 struct strbuf env = STRBUF_INIT;
309 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
310 if (old && *old) {
311 strbuf_addstr(&env, old);
312 strbuf_addch(&env, ' ');
313 }
314 sq_quote_buf(&env, text);
315 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
316 strbuf_release(&env);
317 }
318
319 static inline int iskeychar(int c)
320 {
321 return isalnum(c) || c == '-';
322 }
323
324 /*
325 * Auxiliary function to sanity-check and split the key into the section
326 * identifier and variable name.
327 *
328 * Returns 0 on success, -1 when there is an invalid character in the key and
329 * -2 if there is no section name in the key.
330 *
331 * store_key - pointer to char* which will hold a copy of the key with
332 * lowercase section and variable name
333 * baselen - pointer to int which will hold the length of the
334 * section + subsection part, can be NULL
335 */
336 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
337 {
338 int i, dot, baselen;
339 const char *last_dot = strrchr(key, '.');
340
341 /*
342 * Since "key" actually contains the section name and the real
343 * key name separated by a dot, we have to know where the dot is.
344 */
345
346 if (last_dot == NULL || last_dot == key) {
347 if (!quiet)
348 error(_("key does not contain a section: %s"), key);
349 return -CONFIG_NO_SECTION_OR_NAME;
350 }
351
352 if (!last_dot[1]) {
353 if (!quiet)
354 error(_("key does not contain variable name: %s"), key);
355 return -CONFIG_NO_SECTION_OR_NAME;
356 }
357
358 baselen = last_dot - key;
359 if (baselen_)
360 *baselen_ = baselen;
361
362 /*
363 * Validate the key and while at it, lower case it for matching.
364 */
365 if (store_key)
366 *store_key = xmallocz(strlen(key));
367
368 dot = 0;
369 for (i = 0; key[i]; i++) {
370 unsigned char c = key[i];
371 if (c == '.')
372 dot = 1;
373 /* Leave the extended basename untouched.. */
374 if (!dot || i > baselen) {
375 if (!iskeychar(c) ||
376 (i == baselen + 1 && !isalpha(c))) {
377 if (!quiet)
378 error(_("invalid key: %s"), key);
379 goto out_free_ret_1;
380 }
381 c = tolower(c);
382 } else if (c == '\n') {
383 if (!quiet)
384 error(_("invalid key (newline): %s"), key);
385 goto out_free_ret_1;
386 }
387 if (store_key)
388 (*store_key)[i] = c;
389 }
390
391 return 0;
392
393 out_free_ret_1:
394 if (store_key) {
395 FREE_AND_NULL(*store_key);
396 }
397 return -CONFIG_INVALID_KEY;
398 }
399
400 int git_config_parse_key(const char *key, char **store_key, int *baselen)
401 {
402 return git_config_parse_key_1(key, store_key, baselen, 0);
403 }
404
405 int git_config_key_is_valid(const char *key)
406 {
407 return !git_config_parse_key_1(key, NULL, NULL, 1);
408 }
409
410 int git_config_parse_parameter(const char *text,
411 config_fn_t fn, void *data)
412 {
413 const char *value;
414 char *canonical_name;
415 struct strbuf **pair;
416 int ret;
417
418 pair = strbuf_split_str(text, '=', 2);
419 if (!pair[0])
420 return error(_("bogus config parameter: %s"), text);
421
422 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
423 strbuf_setlen(pair[0], pair[0]->len - 1);
424 value = pair[1] ? pair[1]->buf : "";
425 } else {
426 value = NULL;
427 }
428
429 strbuf_trim(pair[0]);
430 if (!pair[0]->len) {
431 strbuf_list_free(pair);
432 return error(_("bogus config parameter: %s"), text);
433 }
434
435 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
436 ret = -1;
437 } else {
438 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
439 free(canonical_name);
440 }
441 strbuf_list_free(pair);
442 return ret;
443 }
444
445 int git_config_from_parameters(config_fn_t fn, void *data)
446 {
447 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
448 int ret = 0;
449 char *envw;
450 const char **argv = NULL;
451 int nr = 0, alloc = 0;
452 int i;
453 struct config_source source;
454
455 if (!env)
456 return 0;
457
458 memset(&source, 0, sizeof(source));
459 source.prev = cf;
460 source.origin_type = CONFIG_ORIGIN_CMDLINE;
461 cf = &source;
462
463 /* sq_dequote will write over it */
464 envw = xstrdup(env);
465
466 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
467 ret = error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT);
468 goto out;
469 }
470
471 for (i = 0; i < nr; i++) {
472 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
473 ret = -1;
474 goto out;
475 }
476 }
477
478 out:
479 free(argv);
480 free(envw);
481 cf = source.prev;
482 return ret;
483 }
484
485 static int get_next_char(void)
486 {
487 int c = cf->do_fgetc(cf);
488
489 if (c == '\r') {
490 /* DOS like systems */
491 c = cf->do_fgetc(cf);
492 if (c != '\n') {
493 if (c != EOF)
494 cf->do_ungetc(c, cf);
495 c = '\r';
496 }
497 }
498 if (c == '\n')
499 cf->linenr++;
500 if (c == EOF) {
501 cf->eof = 1;
502 cf->linenr++;
503 c = '\n';
504 }
505 return c;
506 }
507
508 static char *parse_value(void)
509 {
510 int quote = 0, comment = 0, space = 0;
511
512 strbuf_reset(&cf->value);
513 for (;;) {
514 int c = get_next_char();
515 if (c == '\n') {
516 if (quote) {
517 cf->linenr--;
518 return NULL;
519 }
520 return cf->value.buf;
521 }
522 if (comment)
523 continue;
524 if (isspace(c) && !quote) {
525 if (cf->value.len)
526 space++;
527 continue;
528 }
529 if (!quote) {
530 if (c == ';' || c == '#') {
531 comment = 1;
532 continue;
533 }
534 }
535 for (; space; space--)
536 strbuf_addch(&cf->value, ' ');
537 if (c == '\\') {
538 c = get_next_char();
539 switch (c) {
540 case '\n':
541 continue;
542 case 't':
543 c = '\t';
544 break;
545 case 'b':
546 c = '\b';
547 break;
548 case 'n':
549 c = '\n';
550 break;
551 /* Some characters escape as themselves */
552 case '\\': case '"':
553 break;
554 /* Reject unknown escape sequences */
555 default:
556 return NULL;
557 }
558 strbuf_addch(&cf->value, c);
559 continue;
560 }
561 if (c == '"') {
562 quote = 1-quote;
563 continue;
564 }
565 strbuf_addch(&cf->value, c);
566 }
567 }
568
569 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
570 {
571 int c;
572 char *value;
573 int ret;
574
575 /* Get the full name */
576 for (;;) {
577 c = get_next_char();
578 if (cf->eof)
579 break;
580 if (!iskeychar(c))
581 break;
582 strbuf_addch(name, tolower(c));
583 }
584
585 while (c == ' ' || c == '\t')
586 c = get_next_char();
587
588 value = NULL;
589 if (c != '\n') {
590 if (c != '=')
591 return -1;
592 value = parse_value();
593 if (!value)
594 return -1;
595 }
596 /*
597 * We already consumed the \n, but we need linenr to point to
598 * the line we just parsed during the call to fn to get
599 * accurate line number in error messages.
600 */
601 cf->linenr--;
602 ret = fn(name->buf, value, data);
603 if (ret >= 0)
604 cf->linenr++;
605 return ret;
606 }
607
608 static int get_extended_base_var(struct strbuf *name, int c)
609 {
610 cf->subsection_case_sensitive = 0;
611 do {
612 if (c == '\n')
613 goto error_incomplete_line;
614 c = get_next_char();
615 } while (isspace(c));
616
617 /* We require the format to be '[base "extension"]' */
618 if (c != '"')
619 return -1;
620 strbuf_addch(name, '.');
621
622 for (;;) {
623 int c = get_next_char();
624 if (c == '\n')
625 goto error_incomplete_line;
626 if (c == '"')
627 break;
628 if (c == '\\') {
629 c = get_next_char();
630 if (c == '\n')
631 goto error_incomplete_line;
632 }
633 strbuf_addch(name, c);
634 }
635
636 /* Final ']' */
637 if (get_next_char() != ']')
638 return -1;
639 return 0;
640 error_incomplete_line:
641 cf->linenr--;
642 return -1;
643 }
644
645 static int get_base_var(struct strbuf *name)
646 {
647 cf->subsection_case_sensitive = 1;
648 for (;;) {
649 int c = get_next_char();
650 if (cf->eof)
651 return -1;
652 if (c == ']')
653 return 0;
654 if (isspace(c))
655 return get_extended_base_var(name, c);
656 if (!iskeychar(c) && c != '.')
657 return -1;
658 strbuf_addch(name, tolower(c));
659 }
660 }
661
662 struct parse_event_data {
663 enum config_event_t previous_type;
664 size_t previous_offset;
665 const struct config_options *opts;
666 };
667
668 static int do_event(enum config_event_t type, struct parse_event_data *data)
669 {
670 size_t offset;
671
672 if (!data->opts || !data->opts->event_fn)
673 return 0;
674
675 if (type == CONFIG_EVENT_WHITESPACE &&
676 data->previous_type == type)
677 return 0;
678
679 offset = cf->do_ftell(cf);
680 /*
681 * At EOF, the parser always "inserts" an extra '\n', therefore
682 * the end offset of the event is the current file position, otherwise
683 * we will already have advanced to the next event.
684 */
685 if (type != CONFIG_EVENT_EOF)
686 offset--;
687
688 if (data->previous_type != CONFIG_EVENT_EOF &&
689 data->opts->event_fn(data->previous_type, data->previous_offset,
690 offset, data->opts->event_fn_data) < 0)
691 return -1;
692
693 data->previous_type = type;
694 data->previous_offset = offset;
695
696 return 0;
697 }
698
699 static int git_parse_source(config_fn_t fn, void *data,
700 const struct config_options *opts)
701 {
702 int comment = 0;
703 int baselen = 0;
704 struct strbuf *var = &cf->var;
705 int error_return = 0;
706 char *error_msg = NULL;
707
708 /* U+FEFF Byte Order Mark in UTF8 */
709 const char *bomptr = utf8_bom;
710
711 /* For the parser event callback */
712 struct parse_event_data event_data = {
713 CONFIG_EVENT_EOF, 0, opts
714 };
715
716 for (;;) {
717 int c;
718
719 c = get_next_char();
720 if (bomptr && *bomptr) {
721 /* We are at the file beginning; skip UTF8-encoded BOM
722 * if present. Sane editors won't put this in on their
723 * own, but e.g. Windows Notepad will do it happily. */
724 if (c == (*bomptr & 0377)) {
725 bomptr++;
726 continue;
727 } else {
728 /* Do not tolerate partial BOM. */
729 if (bomptr != utf8_bom)
730 break;
731 /* No BOM at file beginning. Cool. */
732 bomptr = NULL;
733 }
734 }
735 if (c == '\n') {
736 if (cf->eof) {
737 if (do_event(CONFIG_EVENT_EOF, &event_data) < 0)
738 return -1;
739 return 0;
740 }
741 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
742 return -1;
743 comment = 0;
744 continue;
745 }
746 if (comment)
747 continue;
748 if (isspace(c)) {
749 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
750 return -1;
751 continue;
752 }
753 if (c == '#' || c == ';') {
754 if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0)
755 return -1;
756 comment = 1;
757 continue;
758 }
759 if (c == '[') {
760 if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0)
761 return -1;
762
763 /* Reset prior to determining a new stem */
764 strbuf_reset(var);
765 if (get_base_var(var) < 0 || var->len < 1)
766 break;
767 strbuf_addch(var, '.');
768 baselen = var->len;
769 continue;
770 }
771 if (!isalpha(c))
772 break;
773
774 if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0)
775 return -1;
776
777 /*
778 * Truncate the var name back to the section header
779 * stem prior to grabbing the suffix part of the name
780 * and the value.
781 */
782 strbuf_setlen(var, baselen);
783 strbuf_addch(var, tolower(c));
784 if (get_value(fn, data, var) < 0)
785 break;
786 }
787
788 if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0)
789 return -1;
790
791 switch (cf->origin_type) {
792 case CONFIG_ORIGIN_BLOB:
793 error_msg = xstrfmt(_("bad config line %d in blob %s"),
794 cf->linenr, cf->name);
795 break;
796 case CONFIG_ORIGIN_FILE:
797 error_msg = xstrfmt(_("bad config line %d in file %s"),
798 cf->linenr, cf->name);
799 break;
800 case CONFIG_ORIGIN_STDIN:
801 error_msg = xstrfmt(_("bad config line %d in standard input"),
802 cf->linenr);
803 break;
804 case CONFIG_ORIGIN_SUBMODULE_BLOB:
805 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
806 cf->linenr, cf->name);
807 break;
808 case CONFIG_ORIGIN_CMDLINE:
809 error_msg = xstrfmt(_("bad config line %d in command line %s"),
810 cf->linenr, cf->name);
811 break;
812 default:
813 error_msg = xstrfmt(_("bad config line %d in %s"),
814 cf->linenr, cf->name);
815 }
816
817 switch (opts && opts->error_action ?
818 opts->error_action :
819 cf->default_error_action) {
820 case CONFIG_ERROR_DIE:
821 die("%s", error_msg);
822 break;
823 case CONFIG_ERROR_ERROR:
824 error_return = error("%s", error_msg);
825 break;
826 case CONFIG_ERROR_SILENT:
827 error_return = -1;
828 break;
829 case CONFIG_ERROR_UNSET:
830 BUG("config error action unset");
831 }
832
833 free(error_msg);
834 return error_return;
835 }
836
837 static int parse_unit_factor(const char *end, uintmax_t *val)
838 {
839 if (!*end)
840 return 1;
841 else if (!strcasecmp(end, "k")) {
842 *val *= 1024;
843 return 1;
844 }
845 else if (!strcasecmp(end, "m")) {
846 *val *= 1024 * 1024;
847 return 1;
848 }
849 else if (!strcasecmp(end, "g")) {
850 *val *= 1024 * 1024 * 1024;
851 return 1;
852 }
853 return 0;
854 }
855
856 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
857 {
858 if (value && *value) {
859 char *end;
860 intmax_t val;
861 uintmax_t uval;
862 uintmax_t factor = 1;
863
864 errno = 0;
865 val = strtoimax(value, &end, 0);
866 if (errno == ERANGE)
867 return 0;
868 if (!parse_unit_factor(end, &factor)) {
869 errno = EINVAL;
870 return 0;
871 }
872 uval = labs(val);
873 uval *= factor;
874 if (uval > max || labs(val) > uval) {
875 errno = ERANGE;
876 return 0;
877 }
878 val *= factor;
879 *ret = val;
880 return 1;
881 }
882 errno = EINVAL;
883 return 0;
884 }
885
886 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
887 {
888 if (value && *value) {
889 char *end;
890 uintmax_t val;
891 uintmax_t oldval;
892
893 errno = 0;
894 val = strtoumax(value, &end, 0);
895 if (errno == ERANGE)
896 return 0;
897 oldval = val;
898 if (!parse_unit_factor(end, &val)) {
899 errno = EINVAL;
900 return 0;
901 }
902 if (val > max || oldval > val) {
903 errno = ERANGE;
904 return 0;
905 }
906 *ret = val;
907 return 1;
908 }
909 errno = EINVAL;
910 return 0;
911 }
912
913 static int git_parse_int(const char *value, int *ret)
914 {
915 intmax_t tmp;
916 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
917 return 0;
918 *ret = tmp;
919 return 1;
920 }
921
922 static int git_parse_int64(const char *value, int64_t *ret)
923 {
924 intmax_t tmp;
925 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
926 return 0;
927 *ret = tmp;
928 return 1;
929 }
930
931 int git_parse_ulong(const char *value, unsigned long *ret)
932 {
933 uintmax_t tmp;
934 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
935 return 0;
936 *ret = tmp;
937 return 1;
938 }
939
940 int git_parse_ssize_t(const char *value, ssize_t *ret)
941 {
942 intmax_t tmp;
943 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
944 return 0;
945 *ret = tmp;
946 return 1;
947 }
948
949 NORETURN
950 static void die_bad_number(const char *name, const char *value)
951 {
952 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
953
954 if (!value)
955 value = "";
956
957 if (!(cf && cf->name))
958 die(_("bad numeric config value '%s' for '%s': %s"),
959 value, name, error_type);
960
961 switch (cf->origin_type) {
962 case CONFIG_ORIGIN_BLOB:
963 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
964 value, name, cf->name, error_type);
965 case CONFIG_ORIGIN_FILE:
966 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
967 value, name, cf->name, error_type);
968 case CONFIG_ORIGIN_STDIN:
969 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
970 value, name, error_type);
971 case CONFIG_ORIGIN_SUBMODULE_BLOB:
972 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
973 value, name, cf->name, error_type);
974 case CONFIG_ORIGIN_CMDLINE:
975 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
976 value, name, cf->name, error_type);
977 default:
978 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
979 value, name, cf->name, error_type);
980 }
981 }
982
983 int git_config_int(const char *name, const char *value)
984 {
985 int ret;
986 if (!git_parse_int(value, &ret))
987 die_bad_number(name, value);
988 return ret;
989 }
990
991 int64_t git_config_int64(const char *name, const char *value)
992 {
993 int64_t ret;
994 if (!git_parse_int64(value, &ret))
995 die_bad_number(name, value);
996 return ret;
997 }
998
999 unsigned long git_config_ulong(const char *name, const char *value)
1000 {
1001 unsigned long ret;
1002 if (!git_parse_ulong(value, &ret))
1003 die_bad_number(name, value);
1004 return ret;
1005 }
1006
1007 ssize_t git_config_ssize_t(const char *name, const char *value)
1008 {
1009 ssize_t ret;
1010 if (!git_parse_ssize_t(value, &ret))
1011 die_bad_number(name, value);
1012 return ret;
1013 }
1014
1015 static int git_parse_maybe_bool_text(const char *value)
1016 {
1017 if (!value)
1018 return 1;
1019 if (!*value)
1020 return 0;
1021 if (!strcasecmp(value, "true")
1022 || !strcasecmp(value, "yes")
1023 || !strcasecmp(value, "on"))
1024 return 1;
1025 if (!strcasecmp(value, "false")
1026 || !strcasecmp(value, "no")
1027 || !strcasecmp(value, "off"))
1028 return 0;
1029 return -1;
1030 }
1031
1032 int git_parse_maybe_bool(const char *value)
1033 {
1034 int v = git_parse_maybe_bool_text(value);
1035 if (0 <= v)
1036 return v;
1037 if (git_parse_int(value, &v))
1038 return !!v;
1039 return -1;
1040 }
1041
1042 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1043 {
1044 int v = git_parse_maybe_bool_text(value);
1045 if (0 <= v) {
1046 *is_bool = 1;
1047 return v;
1048 }
1049 *is_bool = 0;
1050 return git_config_int(name, value);
1051 }
1052
1053 int git_config_bool(const char *name, const char *value)
1054 {
1055 int discard;
1056 return !!git_config_bool_or_int(name, value, &discard);
1057 }
1058
1059 int git_config_string(const char **dest, const char *var, const char *value)
1060 {
1061 if (!value)
1062 return config_error_nonbool(var);
1063 *dest = xstrdup(value);
1064 return 0;
1065 }
1066
1067 int git_config_pathname(const char **dest, const char *var, const char *value)
1068 {
1069 if (!value)
1070 return config_error_nonbool(var);
1071 *dest = expand_user_path(value, 0);
1072 if (!*dest)
1073 die(_("failed to expand user dir in: '%s'"), value);
1074 return 0;
1075 }
1076
1077 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1078 {
1079 if (!value)
1080 return config_error_nonbool(var);
1081 if (parse_expiry_date(value, timestamp))
1082 return error(_("'%s' for '%s' is not a valid timestamp"),
1083 value, var);
1084 return 0;
1085 }
1086
1087 int git_config_color(char *dest, const char *var, const char *value)
1088 {
1089 if (!value)
1090 return config_error_nonbool(var);
1091 if (color_parse(value, dest) < 0)
1092 return -1;
1093 return 0;
1094 }
1095
1096 static int git_default_core_config(const char *var, const char *value, void *cb)
1097 {
1098 /* This needs a better name */
1099 if (!strcmp(var, "core.filemode")) {
1100 trust_executable_bit = git_config_bool(var, value);
1101 return 0;
1102 }
1103 if (!strcmp(var, "core.trustctime")) {
1104 trust_ctime = git_config_bool(var, value);
1105 return 0;
1106 }
1107 if (!strcmp(var, "core.checkstat")) {
1108 if (!strcasecmp(value, "default"))
1109 check_stat = 1;
1110 else if (!strcasecmp(value, "minimal"))
1111 check_stat = 0;
1112 }
1113
1114 if (!strcmp(var, "core.quotepath")) {
1115 quote_path_fully = git_config_bool(var, value);
1116 return 0;
1117 }
1118
1119 if (!strcmp(var, "core.symlinks")) {
1120 has_symlinks = git_config_bool(var, value);
1121 return 0;
1122 }
1123
1124 if (!strcmp(var, "core.ignorecase")) {
1125 ignore_case = git_config_bool(var, value);
1126 return 0;
1127 }
1128
1129 if (!strcmp(var, "core.attributesfile"))
1130 return git_config_pathname(&git_attributes_file, var, value);
1131
1132 if (!strcmp(var, "core.hookspath"))
1133 return git_config_pathname(&git_hooks_path, var, value);
1134
1135 if (!strcmp(var, "core.bare")) {
1136 is_bare_repository_cfg = git_config_bool(var, value);
1137 return 0;
1138 }
1139
1140 if (!strcmp(var, "core.ignorestat")) {
1141 assume_unchanged = git_config_bool(var, value);
1142 return 0;
1143 }
1144
1145 if (!strcmp(var, "core.prefersymlinkrefs")) {
1146 prefer_symlink_refs = git_config_bool(var, value);
1147 return 0;
1148 }
1149
1150 if (!strcmp(var, "core.logallrefupdates")) {
1151 if (value && !strcasecmp(value, "always"))
1152 log_all_ref_updates = LOG_REFS_ALWAYS;
1153 else if (git_config_bool(var, value))
1154 log_all_ref_updates = LOG_REFS_NORMAL;
1155 else
1156 log_all_ref_updates = LOG_REFS_NONE;
1157 return 0;
1158 }
1159
1160 if (!strcmp(var, "core.warnambiguousrefs")) {
1161 warn_ambiguous_refs = git_config_bool(var, value);
1162 return 0;
1163 }
1164
1165 if (!strcmp(var, "core.abbrev")) {
1166 if (!value)
1167 return config_error_nonbool(var);
1168 if (!strcasecmp(value, "auto"))
1169 default_abbrev = -1;
1170 else {
1171 int abbrev = git_config_int(var, value);
1172 if (abbrev < minimum_abbrev || abbrev > 40)
1173 return error(_("abbrev length out of range: %d"), abbrev);
1174 default_abbrev = abbrev;
1175 }
1176 return 0;
1177 }
1178
1179 if (!strcmp(var, "core.disambiguate"))
1180 return set_disambiguate_hint_config(var, value);
1181
1182 if (!strcmp(var, "core.loosecompression")) {
1183 int level = git_config_int(var, value);
1184 if (level == -1)
1185 level = Z_DEFAULT_COMPRESSION;
1186 else if (level < 0 || level > Z_BEST_COMPRESSION)
1187 die(_("bad zlib compression level %d"), level);
1188 zlib_compression_level = level;
1189 zlib_compression_seen = 1;
1190 return 0;
1191 }
1192
1193 if (!strcmp(var, "core.compression")) {
1194 int level = git_config_int(var, value);
1195 if (level == -1)
1196 level = Z_DEFAULT_COMPRESSION;
1197 else if (level < 0 || level > Z_BEST_COMPRESSION)
1198 die(_("bad zlib compression level %d"), level);
1199 core_compression_level = level;
1200 core_compression_seen = 1;
1201 if (!zlib_compression_seen)
1202 zlib_compression_level = level;
1203 if (!pack_compression_seen)
1204 pack_compression_level = level;
1205 return 0;
1206 }
1207
1208 if (!strcmp(var, "core.packedgitwindowsize")) {
1209 int pgsz_x2 = getpagesize() * 2;
1210 packed_git_window_size = git_config_ulong(var, value);
1211
1212 /* This value must be multiple of (pagesize * 2) */
1213 packed_git_window_size /= pgsz_x2;
1214 if (packed_git_window_size < 1)
1215 packed_git_window_size = 1;
1216 packed_git_window_size *= pgsz_x2;
1217 return 0;
1218 }
1219
1220 if (!strcmp(var, "core.bigfilethreshold")) {
1221 big_file_threshold = git_config_ulong(var, value);
1222 return 0;
1223 }
1224
1225 if (!strcmp(var, "core.packedgitlimit")) {
1226 packed_git_limit = git_config_ulong(var, value);
1227 return 0;
1228 }
1229
1230 if (!strcmp(var, "core.deltabasecachelimit")) {
1231 delta_base_cache_limit = git_config_ulong(var, value);
1232 return 0;
1233 }
1234
1235 if (!strcmp(var, "core.autocrlf")) {
1236 if (value && !strcasecmp(value, "input")) {
1237 auto_crlf = AUTO_CRLF_INPUT;
1238 return 0;
1239 }
1240 auto_crlf = git_config_bool(var, value);
1241 return 0;
1242 }
1243
1244 if (!strcmp(var, "core.safecrlf")) {
1245 int eol_rndtrp_die;
1246 if (value && !strcasecmp(value, "warn")) {
1247 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1248 return 0;
1249 }
1250 eol_rndtrp_die = git_config_bool(var, value);
1251 global_conv_flags_eol = eol_rndtrp_die ?
1252 CONV_EOL_RNDTRP_DIE : 0;
1253 return 0;
1254 }
1255
1256 if (!strcmp(var, "core.eol")) {
1257 if (value && !strcasecmp(value, "lf"))
1258 core_eol = EOL_LF;
1259 else if (value && !strcasecmp(value, "crlf"))
1260 core_eol = EOL_CRLF;
1261 else if (value && !strcasecmp(value, "native"))
1262 core_eol = EOL_NATIVE;
1263 else
1264 core_eol = EOL_UNSET;
1265 return 0;
1266 }
1267
1268 if (!strcmp(var, "core.checkroundtripencoding")) {
1269 check_roundtrip_encoding = xstrdup(value);
1270 return 0;
1271 }
1272
1273 if (!strcmp(var, "core.notesref")) {
1274 notes_ref_name = xstrdup(value);
1275 return 0;
1276 }
1277
1278 if (!strcmp(var, "core.editor"))
1279 return git_config_string(&editor_program, var, value);
1280
1281 if (!strcmp(var, "core.commentchar")) {
1282 if (!value)
1283 return config_error_nonbool(var);
1284 else if (!strcasecmp(value, "auto"))
1285 auto_comment_line_char = 1;
1286 else if (value[0] && !value[1]) {
1287 comment_line_char = value[0];
1288 auto_comment_line_char = 0;
1289 } else
1290 return error(_("core.commentChar should only be one character"));
1291 return 0;
1292 }
1293
1294 if (!strcmp(var, "core.askpass"))
1295 return git_config_string(&askpass_program, var, value);
1296
1297 if (!strcmp(var, "core.excludesfile"))
1298 return git_config_pathname(&excludes_file, var, value);
1299
1300 if (!strcmp(var, "core.whitespace")) {
1301 if (!value)
1302 return config_error_nonbool(var);
1303 whitespace_rule_cfg = parse_whitespace_rule(value);
1304 return 0;
1305 }
1306
1307 if (!strcmp(var, "core.fsyncobjectfiles")) {
1308 fsync_object_files = git_config_bool(var, value);
1309 return 0;
1310 }
1311
1312 if (!strcmp(var, "core.preloadindex")) {
1313 core_preload_index = git_config_bool(var, value);
1314 return 0;
1315 }
1316
1317 if (!strcmp(var, "core.createobject")) {
1318 if (!strcmp(value, "rename"))
1319 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1320 else if (!strcmp(value, "link"))
1321 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1322 else
1323 die(_("invalid mode for object creation: %s"), value);
1324 return 0;
1325 }
1326
1327 if (!strcmp(var, "core.sparsecheckout")) {
1328 core_apply_sparse_checkout = git_config_bool(var, value);
1329 return 0;
1330 }
1331
1332 if (!strcmp(var, "core.precomposeunicode")) {
1333 precomposed_unicode = git_config_bool(var, value);
1334 return 0;
1335 }
1336
1337 if (!strcmp(var, "core.protecthfs")) {
1338 protect_hfs = git_config_bool(var, value);
1339 return 0;
1340 }
1341
1342 if (!strcmp(var, "core.protectntfs")) {
1343 protect_ntfs = git_config_bool(var, value);
1344 return 0;
1345 }
1346
1347 if (!strcmp(var, "core.partialclonefilter")) {
1348 return git_config_string(&core_partial_clone_filter_default,
1349 var, value);
1350 }
1351
1352 if (!strcmp(var, "core.usereplacerefs")) {
1353 read_replace_refs = git_config_bool(var, value);
1354 return 0;
1355 }
1356
1357 /* Add other config variables here and to Documentation/config.txt. */
1358 return platform_core_config(var, value, cb);
1359 }
1360
1361 static int git_default_i18n_config(const char *var, const char *value)
1362 {
1363 if (!strcmp(var, "i18n.commitencoding"))
1364 return git_config_string(&git_commit_encoding, var, value);
1365
1366 if (!strcmp(var, "i18n.logoutputencoding"))
1367 return git_config_string(&git_log_output_encoding, var, value);
1368
1369 /* Add other config variables here and to Documentation/config.txt. */
1370 return 0;
1371 }
1372
1373 static int git_default_branch_config(const char *var, const char *value)
1374 {
1375 if (!strcmp(var, "branch.autosetupmerge")) {
1376 if (value && !strcasecmp(value, "always")) {
1377 git_branch_track = BRANCH_TRACK_ALWAYS;
1378 return 0;
1379 }
1380 git_branch_track = git_config_bool(var, value);
1381 return 0;
1382 }
1383 if (!strcmp(var, "branch.autosetuprebase")) {
1384 if (!value)
1385 return config_error_nonbool(var);
1386 else if (!strcmp(value, "never"))
1387 autorebase = AUTOREBASE_NEVER;
1388 else if (!strcmp(value, "local"))
1389 autorebase = AUTOREBASE_LOCAL;
1390 else if (!strcmp(value, "remote"))
1391 autorebase = AUTOREBASE_REMOTE;
1392 else if (!strcmp(value, "always"))
1393 autorebase = AUTOREBASE_ALWAYS;
1394 else
1395 return error(_("malformed value for %s"), var);
1396 return 0;
1397 }
1398
1399 /* Add other config variables here and to Documentation/config.txt. */
1400 return 0;
1401 }
1402
1403 static int git_default_push_config(const char *var, const char *value)
1404 {
1405 if (!strcmp(var, "push.default")) {
1406 if (!value)
1407 return config_error_nonbool(var);
1408 else if (!strcmp(value, "nothing"))
1409 push_default = PUSH_DEFAULT_NOTHING;
1410 else if (!strcmp(value, "matching"))
1411 push_default = PUSH_DEFAULT_MATCHING;
1412 else if (!strcmp(value, "simple"))
1413 push_default = PUSH_DEFAULT_SIMPLE;
1414 else if (!strcmp(value, "upstream"))
1415 push_default = PUSH_DEFAULT_UPSTREAM;
1416 else if (!strcmp(value, "tracking")) /* deprecated */
1417 push_default = PUSH_DEFAULT_UPSTREAM;
1418 else if (!strcmp(value, "current"))
1419 push_default = PUSH_DEFAULT_CURRENT;
1420 else {
1421 error(_("malformed value for %s: %s"), var, value);
1422 return error(_("must be one of nothing, matching, simple, "
1423 "upstream or current"));
1424 }
1425 return 0;
1426 }
1427
1428 /* Add other config variables here and to Documentation/config.txt. */
1429 return 0;
1430 }
1431
1432 static int git_default_mailmap_config(const char *var, const char *value)
1433 {
1434 if (!strcmp(var, "mailmap.file"))
1435 return git_config_pathname(&git_mailmap_file, var, value);
1436 if (!strcmp(var, "mailmap.blob"))
1437 return git_config_string(&git_mailmap_blob, var, value);
1438
1439 /* Add other config variables here and to Documentation/config.txt. */
1440 return 0;
1441 }
1442
1443 int git_default_config(const char *var, const char *value, void *cb)
1444 {
1445 if (starts_with(var, "core."))
1446 return git_default_core_config(var, value, cb);
1447
1448 if (starts_with(var, "user."))
1449 return git_ident_config(var, value, cb);
1450
1451 if (starts_with(var, "i18n."))
1452 return git_default_i18n_config(var, value);
1453
1454 if (starts_with(var, "branch."))
1455 return git_default_branch_config(var, value);
1456
1457 if (starts_with(var, "push."))
1458 return git_default_push_config(var, value);
1459
1460 if (starts_with(var, "mailmap."))
1461 return git_default_mailmap_config(var, value);
1462
1463 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1464 return git_default_advice_config(var, value);
1465
1466 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1467 pager_use_color = git_config_bool(var,value);
1468 return 0;
1469 }
1470
1471 if (!strcmp(var, "pack.packsizelimit")) {
1472 pack_size_limit_cfg = git_config_ulong(var, value);
1473 return 0;
1474 }
1475
1476 if (!strcmp(var, "pack.compression")) {
1477 int level = git_config_int(var, value);
1478 if (level == -1)
1479 level = Z_DEFAULT_COMPRESSION;
1480 else if (level < 0 || level > Z_BEST_COMPRESSION)
1481 die(_("bad pack compression level %d"), level);
1482 pack_compression_level = level;
1483 pack_compression_seen = 1;
1484 return 0;
1485 }
1486
1487 /* Add other config variables here and to Documentation/config.txt. */
1488 return 0;
1489 }
1490
1491 /*
1492 * All source specific fields in the union, die_on_error, name and the callbacks
1493 * fgetc, ungetc, ftell of top need to be initialized before calling
1494 * this function.
1495 */
1496 static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
1497 const struct config_options *opts)
1498 {
1499 int ret;
1500
1501 /* push config-file parsing state stack */
1502 top->prev = cf;
1503 top->linenr = 1;
1504 top->eof = 0;
1505 strbuf_init(&top->value, 1024);
1506 strbuf_init(&top->var, 1024);
1507 cf = top;
1508
1509 ret = git_parse_source(fn, data, opts);
1510
1511 /* pop config-file parsing state stack */
1512 strbuf_release(&top->value);
1513 strbuf_release(&top->var);
1514 cf = top->prev;
1515
1516 return ret;
1517 }
1518
1519 static int do_config_from_file(config_fn_t fn,
1520 const enum config_origin_type origin_type,
1521 const char *name, const char *path, FILE *f,
1522 void *data, const struct config_options *opts)
1523 {
1524 struct config_source top;
1525 int ret;
1526
1527 top.u.file = f;
1528 top.origin_type = origin_type;
1529 top.name = name;
1530 top.path = path;
1531 top.default_error_action = CONFIG_ERROR_DIE;
1532 top.do_fgetc = config_file_fgetc;
1533 top.do_ungetc = config_file_ungetc;
1534 top.do_ftell = config_file_ftell;
1535
1536 flockfile(f);
1537 ret = do_config_from(&top, fn, data, opts);
1538 funlockfile(f);
1539 return ret;
1540 }
1541
1542 static int git_config_from_stdin(config_fn_t fn, void *data)
1543 {
1544 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1545 data, NULL);
1546 }
1547
1548 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1549 void *data,
1550 const struct config_options *opts)
1551 {
1552 int ret = -1;
1553 FILE *f;
1554
1555 f = fopen_or_warn(filename, "r");
1556 if (f) {
1557 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1558 filename, f, data, opts);
1559 fclose(f);
1560 }
1561 return ret;
1562 }
1563
1564 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1565 {
1566 return git_config_from_file_with_options(fn, filename, data, NULL);
1567 }
1568
1569 int git_config_from_mem(config_fn_t fn,
1570 const enum config_origin_type origin_type,
1571 const char *name, const char *buf, size_t len,
1572 void *data, const struct config_options *opts)
1573 {
1574 struct config_source top;
1575
1576 top.u.buf.buf = buf;
1577 top.u.buf.len = len;
1578 top.u.buf.pos = 0;
1579 top.origin_type = origin_type;
1580 top.name = name;
1581 top.path = NULL;
1582 top.default_error_action = CONFIG_ERROR_ERROR;
1583 top.do_fgetc = config_buf_fgetc;
1584 top.do_ungetc = config_buf_ungetc;
1585 top.do_ftell = config_buf_ftell;
1586
1587 return do_config_from(&top, fn, data, opts);
1588 }
1589
1590 int git_config_from_blob_oid(config_fn_t fn,
1591 const char *name,
1592 const struct object_id *oid,
1593 void *data)
1594 {
1595 enum object_type type;
1596 char *buf;
1597 unsigned long size;
1598 int ret;
1599
1600 buf = read_object_file(oid, &type, &size);
1601 if (!buf)
1602 return error(_("unable to load config blob object '%s'"), name);
1603 if (type != OBJ_BLOB) {
1604 free(buf);
1605 return error(_("reference '%s' does not point to a blob"), name);
1606 }
1607
1608 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1609 data, NULL);
1610 free(buf);
1611
1612 return ret;
1613 }
1614
1615 static int git_config_from_blob_ref(config_fn_t fn,
1616 const char *name,
1617 void *data)
1618 {
1619 struct object_id oid;
1620
1621 if (get_oid(name, &oid) < 0)
1622 return error(_("unable to resolve config blob '%s'"), name);
1623 return git_config_from_blob_oid(fn, name, &oid, data);
1624 }
1625
1626 const char *git_etc_gitconfig(void)
1627 {
1628 static const char *system_wide;
1629 if (!system_wide)
1630 system_wide = system_path(ETC_GITCONFIG);
1631 return system_wide;
1632 }
1633
1634 /*
1635 * Parse environment variable 'k' as a boolean (in various
1636 * possible spellings); if missing, use the default value 'def'.
1637 */
1638 int git_env_bool(const char *k, int def)
1639 {
1640 const char *v = getenv(k);
1641 return v ? git_config_bool(k, v) : def;
1642 }
1643
1644 /*
1645 * Parse environment variable 'k' as ulong with possibly a unit
1646 * suffix; if missing, use the default value 'val'.
1647 */
1648 unsigned long git_env_ulong(const char *k, unsigned long val)
1649 {
1650 const char *v = getenv(k);
1651 if (v && !git_parse_ulong(v, &val))
1652 die(_("failed to parse %s"), k);
1653 return val;
1654 }
1655
1656 int git_config_system(void)
1657 {
1658 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1659 }
1660
1661 static int do_git_config_sequence(const struct config_options *opts,
1662 config_fn_t fn, void *data)
1663 {
1664 int ret = 0;
1665 char *xdg_config = xdg_config_home("config");
1666 char *user_config = expand_user_path("~/.gitconfig", 0);
1667 char *repo_config;
1668
1669 if (opts->commondir)
1670 repo_config = mkpathdup("%s/config", opts->commondir);
1671 else
1672 repo_config = NULL;
1673
1674 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1675 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1676 ret += git_config_from_file(fn, git_etc_gitconfig(),
1677 data);
1678
1679 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1680 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1681 ret += git_config_from_file(fn, xdg_config, data);
1682
1683 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1684 ret += git_config_from_file(fn, user_config, data);
1685
1686 current_parsing_scope = CONFIG_SCOPE_REPO;
1687 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1688 ret += git_config_from_file(fn, repo_config, data);
1689
1690 /*
1691 * Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
1692 * But let's not complicate things before it's actually needed.
1693 */
1694 if (repository_format_worktree_config) {
1695 char *path = git_pathdup("config.worktree");
1696 if (!access_or_die(path, R_OK, 0))
1697 ret += git_config_from_file(fn, path, data);
1698 free(path);
1699 }
1700
1701 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1702 if (git_config_from_parameters(fn, data) < 0)
1703 die(_("unable to parse command-line config"));
1704
1705 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1706 free(xdg_config);
1707 free(user_config);
1708 free(repo_config);
1709 return ret;
1710 }
1711
1712 int config_with_options(config_fn_t fn, void *data,
1713 struct git_config_source *config_source,
1714 const struct config_options *opts)
1715 {
1716 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1717
1718 if (opts->respect_includes) {
1719 inc.fn = fn;
1720 inc.data = data;
1721 inc.opts = opts;
1722 fn = git_config_include;
1723 data = &inc;
1724 }
1725
1726 /*
1727 * If we have a specific filename, use it. Otherwise, follow the
1728 * regular lookup sequence.
1729 */
1730 if (config_source && config_source->use_stdin)
1731 return git_config_from_stdin(fn, data);
1732 else if (config_source && config_source->file)
1733 return git_config_from_file(fn, config_source->file, data);
1734 else if (config_source && config_source->blob)
1735 return git_config_from_blob_ref(fn, config_source->blob, data);
1736
1737 return do_git_config_sequence(opts, fn, data);
1738 }
1739
1740 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1741 {
1742 int i, value_index;
1743 struct string_list *values;
1744 struct config_set_element *entry;
1745 struct configset_list *list = &cs->list;
1746
1747 for (i = 0; i < list->nr; i++) {
1748 entry = list->items[i].e;
1749 value_index = list->items[i].value_index;
1750 values = &entry->value_list;
1751
1752 current_config_kvi = values->items[value_index].util;
1753
1754 if (fn(entry->key, values->items[value_index].string, data) < 0)
1755 git_die_config_linenr(entry->key,
1756 current_config_kvi->filename,
1757 current_config_kvi->linenr);
1758
1759 current_config_kvi = NULL;
1760 }
1761 }
1762
1763 void read_early_config(config_fn_t cb, void *data)
1764 {
1765 struct config_options opts = {0};
1766 struct strbuf commondir = STRBUF_INIT;
1767 struct strbuf gitdir = STRBUF_INIT;
1768
1769 opts.respect_includes = 1;
1770
1771 if (have_git_dir()) {
1772 opts.commondir = get_git_common_dir();
1773 opts.git_dir = get_git_dir();
1774 /*
1775 * When setup_git_directory() was not yet asked to discover the
1776 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1777 * is any repository config we should use (but unlike
1778 * setup_git_directory_gently(), no global state is changed, most
1779 * notably, the current working directory is still the same after the
1780 * call).
1781 */
1782 } else if (!discover_git_directory(&commondir, &gitdir)) {
1783 opts.commondir = commondir.buf;
1784 opts.git_dir = gitdir.buf;
1785 }
1786
1787 config_with_options(cb, data, NULL, &opts);
1788
1789 strbuf_release(&commondir);
1790 strbuf_release(&gitdir);
1791 }
1792
1793 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1794 {
1795 struct config_set_element k;
1796 struct config_set_element *found_entry;
1797 char *normalized_key;
1798 /*
1799 * `key` may come from the user, so normalize it before using it
1800 * for querying entries from the hashmap.
1801 */
1802 if (git_config_parse_key(key, &normalized_key, NULL))
1803 return NULL;
1804
1805 hashmap_entry_init(&k, strhash(normalized_key));
1806 k.key = normalized_key;
1807 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1808 free(normalized_key);
1809 return found_entry;
1810 }
1811
1812 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1813 {
1814 struct config_set_element *e;
1815 struct string_list_item *si;
1816 struct configset_list_item *l_item;
1817 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1818
1819 e = configset_find_element(cs, key);
1820 /*
1821 * Since the keys are being fed by git_config*() callback mechanism, they
1822 * are already normalized. So simply add them without any further munging.
1823 */
1824 if (!e) {
1825 e = xmalloc(sizeof(*e));
1826 hashmap_entry_init(e, strhash(key));
1827 e->key = xstrdup(key);
1828 string_list_init(&e->value_list, 1);
1829 hashmap_add(&cs->config_hash, e);
1830 }
1831 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1832
1833 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1834 l_item = &cs->list.items[cs->list.nr++];
1835 l_item->e = e;
1836 l_item->value_index = e->value_list.nr - 1;
1837
1838 if (!cf)
1839 BUG("configset_add_value has no source");
1840 if (cf->name) {
1841 kv_info->filename = strintern(cf->name);
1842 kv_info->linenr = cf->linenr;
1843 kv_info->origin_type = cf->origin_type;
1844 } else {
1845 /* for values read from `git_config_from_parameters()` */
1846 kv_info->filename = NULL;
1847 kv_info->linenr = -1;
1848 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1849 }
1850 kv_info->scope = current_parsing_scope;
1851 si->util = kv_info;
1852
1853 return 0;
1854 }
1855
1856 static int config_set_element_cmp(const void *unused_cmp_data,
1857 const void *entry,
1858 const void *entry_or_key,
1859 const void *unused_keydata)
1860 {
1861 const struct config_set_element *e1 = entry;
1862 const struct config_set_element *e2 = entry_or_key;
1863
1864 return strcmp(e1->key, e2->key);
1865 }
1866
1867 void git_configset_init(struct config_set *cs)
1868 {
1869 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1870 cs->hash_initialized = 1;
1871 cs->list.nr = 0;
1872 cs->list.alloc = 0;
1873 cs->list.items = NULL;
1874 }
1875
1876 void git_configset_clear(struct config_set *cs)
1877 {
1878 struct config_set_element *entry;
1879 struct hashmap_iter iter;
1880 if (!cs->hash_initialized)
1881 return;
1882
1883 hashmap_iter_init(&cs->config_hash, &iter);
1884 while ((entry = hashmap_iter_next(&iter))) {
1885 free(entry->key);
1886 string_list_clear(&entry->value_list, 1);
1887 }
1888 hashmap_free(&cs->config_hash, 1);
1889 cs->hash_initialized = 0;
1890 free(cs->list.items);
1891 cs->list.nr = 0;
1892 cs->list.alloc = 0;
1893 cs->list.items = NULL;
1894 }
1895
1896 static int config_set_callback(const char *key, const char *value, void *cb)
1897 {
1898 struct config_set *cs = cb;
1899 configset_add_value(cs, key, value);
1900 return 0;
1901 }
1902
1903 int git_configset_add_file(struct config_set *cs, const char *filename)
1904 {
1905 return git_config_from_file(config_set_callback, filename, cs);
1906 }
1907
1908 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1909 {
1910 const struct string_list *values = NULL;
1911 /*
1912 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1913 * queried key in the files of the configset, the value returned will be the last
1914 * value in the value list for that key.
1915 */
1916 values = git_configset_get_value_multi(cs, key);
1917
1918 if (!values)
1919 return 1;
1920 assert(values->nr > 0);
1921 *value = values->items[values->nr - 1].string;
1922 return 0;
1923 }
1924
1925 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1926 {
1927 struct config_set_element *e = configset_find_element(cs, key);
1928 return e ? &e->value_list : NULL;
1929 }
1930
1931 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1932 {
1933 const char *value;
1934 if (!git_configset_get_value(cs, key, &value))
1935 return git_config_string(dest, key, value);
1936 else
1937 return 1;
1938 }
1939
1940 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1941 {
1942 return git_configset_get_string_const(cs, key, (const char **)dest);
1943 }
1944
1945 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1946 {
1947 const char *value;
1948 if (!git_configset_get_value(cs, key, &value)) {
1949 *dest = git_config_int(key, value);
1950 return 0;
1951 } else
1952 return 1;
1953 }
1954
1955 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1956 {
1957 const char *value;
1958 if (!git_configset_get_value(cs, key, &value)) {
1959 *dest = git_config_ulong(key, value);
1960 return 0;
1961 } else
1962 return 1;
1963 }
1964
1965 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1966 {
1967 const char *value;
1968 if (!git_configset_get_value(cs, key, &value)) {
1969 *dest = git_config_bool(key, value);
1970 return 0;
1971 } else
1972 return 1;
1973 }
1974
1975 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1976 int *is_bool, int *dest)
1977 {
1978 const char *value;
1979 if (!git_configset_get_value(cs, key, &value)) {
1980 *dest = git_config_bool_or_int(key, value, is_bool);
1981 return 0;
1982 } else
1983 return 1;
1984 }
1985
1986 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1987 {
1988 const char *value;
1989 if (!git_configset_get_value(cs, key, &value)) {
1990 *dest = git_parse_maybe_bool(value);
1991 if (*dest == -1)
1992 return -1;
1993 return 0;
1994 } else
1995 return 1;
1996 }
1997
1998 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1999 {
2000 const char *value;
2001 if (!git_configset_get_value(cs, key, &value))
2002 return git_config_pathname(dest, key, value);
2003 else
2004 return 1;
2005 }
2006
2007 /* Functions use to read configuration from a repository */
2008 static void repo_read_config(struct repository *repo)
2009 {
2010 struct config_options opts;
2011
2012 opts.respect_includes = 1;
2013 opts.commondir = repo->commondir;
2014 opts.git_dir = repo->gitdir;
2015
2016 if (!repo->config)
2017 repo->config = xcalloc(1, sizeof(struct config_set));
2018 else
2019 git_configset_clear(repo->config);
2020
2021 git_configset_init(repo->config);
2022
2023 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
2024 /*
2025 * config_with_options() normally returns only
2026 * zero, as most errors are fatal, and
2027 * non-fatal potential errors are guarded by "if"
2028 * statements that are entered only when no error is
2029 * possible.
2030 *
2031 * If we ever encounter a non-fatal error, it means
2032 * something went really wrong and we should stop
2033 * immediately.
2034 */
2035 die(_("unknown error occurred while reading the configuration files"));
2036 }
2037
2038 static void git_config_check_init(struct repository *repo)
2039 {
2040 if (repo->config && repo->config->hash_initialized)
2041 return;
2042 repo_read_config(repo);
2043 }
2044
2045 static void repo_config_clear(struct repository *repo)
2046 {
2047 if (!repo->config || !repo->config->hash_initialized)
2048 return;
2049 git_configset_clear(repo->config);
2050 }
2051
2052 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2053 {
2054 git_config_check_init(repo);
2055 configset_iter(repo->config, fn, data);
2056 }
2057
2058 int repo_config_get_value(struct repository *repo,
2059 const char *key, const char **value)
2060 {
2061 git_config_check_init(repo);
2062 return git_configset_get_value(repo->config, key, value);
2063 }
2064
2065 const struct string_list *repo_config_get_value_multi(struct repository *repo,
2066 const char *key)
2067 {
2068 git_config_check_init(repo);
2069 return git_configset_get_value_multi(repo->config, key);
2070 }
2071
2072 int repo_config_get_string_const(struct repository *repo,
2073 const char *key, const char **dest)
2074 {
2075 int ret;
2076 git_config_check_init(repo);
2077 ret = git_configset_get_string_const(repo->config, key, dest);
2078 if (ret < 0)
2079 git_die_config(key, NULL);
2080 return ret;
2081 }
2082
2083 int repo_config_get_string(struct repository *repo,
2084 const char *key, char **dest)
2085 {
2086 git_config_check_init(repo);
2087 return repo_config_get_string_const(repo, key, (const char **)dest);
2088 }
2089
2090 int repo_config_get_int(struct repository *repo,
2091 const char *key, int *dest)
2092 {
2093 git_config_check_init(repo);
2094 return git_configset_get_int(repo->config, key, dest);
2095 }
2096
2097 int repo_config_get_ulong(struct repository *repo,
2098 const char *key, unsigned long *dest)
2099 {
2100 git_config_check_init(repo);
2101 return git_configset_get_ulong(repo->config, key, dest);
2102 }
2103
2104 int repo_config_get_bool(struct repository *repo,
2105 const char *key, int *dest)
2106 {
2107 git_config_check_init(repo);
2108 return git_configset_get_bool(repo->config, key, dest);
2109 }
2110
2111 int repo_config_get_bool_or_int(struct repository *repo,
2112 const char *key, int *is_bool, int *dest)
2113 {
2114 git_config_check_init(repo);
2115 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2116 }
2117
2118 int repo_config_get_maybe_bool(struct repository *repo,
2119 const char *key, int *dest)
2120 {
2121 git_config_check_init(repo);
2122 return git_configset_get_maybe_bool(repo->config, key, dest);
2123 }
2124
2125 int repo_config_get_pathname(struct repository *repo,
2126 const char *key, const char **dest)
2127 {
2128 int ret;
2129 git_config_check_init(repo);
2130 ret = git_configset_get_pathname(repo->config, key, dest);
2131 if (ret < 0)
2132 git_die_config(key, NULL);
2133 return ret;
2134 }
2135
2136 /* Functions used historically to read configuration from 'the_repository' */
2137 void git_config(config_fn_t fn, void *data)
2138 {
2139 repo_config(the_repository, fn, data);
2140 }
2141
2142 void git_config_clear(void)
2143 {
2144 repo_config_clear(the_repository);
2145 }
2146
2147 int git_config_get_value(const char *key, const char **value)
2148 {
2149 return repo_config_get_value(the_repository, key, value);
2150 }
2151
2152 const struct string_list *git_config_get_value_multi(const char *key)
2153 {
2154 return repo_config_get_value_multi(the_repository, key);
2155 }
2156
2157 int git_config_get_string_const(const char *key, const char **dest)
2158 {
2159 return repo_config_get_string_const(the_repository, key, dest);
2160 }
2161
2162 int git_config_get_string(const char *key, char **dest)
2163 {
2164 return repo_config_get_string(the_repository, key, dest);
2165 }
2166
2167 int git_config_get_int(const char *key, int *dest)
2168 {
2169 return repo_config_get_int(the_repository, key, dest);
2170 }
2171
2172 int git_config_get_ulong(const char *key, unsigned long *dest)
2173 {
2174 return repo_config_get_ulong(the_repository, key, dest);
2175 }
2176
2177 int git_config_get_bool(const char *key, int *dest)
2178 {
2179 return repo_config_get_bool(the_repository, key, dest);
2180 }
2181
2182 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2183 {
2184 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2185 }
2186
2187 int git_config_get_maybe_bool(const char *key, int *dest)
2188 {
2189 return repo_config_get_maybe_bool(the_repository, key, dest);
2190 }
2191
2192 int git_config_get_pathname(const char *key, const char **dest)
2193 {
2194 return repo_config_get_pathname(the_repository, key, dest);
2195 }
2196
2197 int git_config_get_expiry(const char *key, const char **output)
2198 {
2199 int ret = git_config_get_string_const(key, output);
2200 if (ret)
2201 return ret;
2202 if (strcmp(*output, "now")) {
2203 timestamp_t now = approxidate("now");
2204 if (approxidate(*output) >= now)
2205 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2206 }
2207 return ret;
2208 }
2209
2210 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2211 {
2212 char *expiry_string;
2213 intmax_t days;
2214 timestamp_t when;
2215
2216 if (git_config_get_string(key, &expiry_string))
2217 return 1; /* no such thing */
2218
2219 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2220 const int scale = 86400;
2221 *expiry = now - days * scale;
2222 return 0;
2223 }
2224
2225 if (!parse_expiry_date(expiry_string, &when)) {
2226 *expiry = when;
2227 return 0;
2228 }
2229 return -1; /* thing exists but cannot be parsed */
2230 }
2231
2232 int git_config_get_untracked_cache(void)
2233 {
2234 int val = -1;
2235 const char *v;
2236
2237 /* Hack for test programs like test-dump-untracked-cache */
2238 if (ignore_untracked_cache_config)
2239 return -1;
2240
2241 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2242 return val;
2243
2244 if (!git_config_get_value("core.untrackedcache", &v)) {
2245 if (!strcasecmp(v, "keep"))
2246 return -1;
2247
2248 error(_("unknown core.untrackedCache value '%s'; "
2249 "using 'keep' default value"), v);
2250 return -1;
2251 }
2252
2253 return -1; /* default value */
2254 }
2255
2256 int git_config_get_split_index(void)
2257 {
2258 int val;
2259
2260 if (!git_config_get_maybe_bool("core.splitindex", &val))
2261 return val;
2262
2263 return -1; /* default value */
2264 }
2265
2266 int git_config_get_max_percent_split_change(void)
2267 {
2268 int val = -1;
2269
2270 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2271 if (0 <= val && val <= 100)
2272 return val;
2273
2274 return error(_("splitIndex.maxPercentChange value '%d' "
2275 "should be between 0 and 100"), val);
2276 }
2277
2278 return -1; /* default value */
2279 }
2280
2281 int git_config_get_fsmonitor(void)
2282 {
2283 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2284 core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
2285
2286 if (core_fsmonitor && !*core_fsmonitor)
2287 core_fsmonitor = NULL;
2288
2289 if (core_fsmonitor)
2290 return 1;
2291
2292 return 0;
2293 }
2294
2295 int git_config_get_index_threads(void)
2296 {
2297 int is_bool, val = 0;
2298
2299 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2300 if (val)
2301 return val;
2302
2303 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2304 if (is_bool)
2305 return val ? 0 : 1;
2306 else
2307 return val;
2308 }
2309
2310 return 0; /* auto */
2311 }
2312
2313 NORETURN
2314 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2315 {
2316 if (!filename)
2317 die(_("unable to parse '%s' from command-line config"), key);
2318 else
2319 die(_("bad config variable '%s' in file '%s' at line %d"),
2320 key, filename, linenr);
2321 }
2322
2323 NORETURN __attribute__((format(printf, 2, 3)))
2324 void git_die_config(const char *key, const char *err, ...)
2325 {
2326 const struct string_list *values;
2327 struct key_value_info *kv_info;
2328
2329 if (err) {
2330 va_list params;
2331 va_start(params, err);
2332 vreportf("error: ", err, params);
2333 va_end(params);
2334 }
2335 values = git_config_get_value_multi(key);
2336 kv_info = values->items[values->nr - 1].util;
2337 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2338 }
2339
2340 /*
2341 * Find all the stuff for git_config_set() below.
2342 */
2343
2344 struct config_store_data {
2345 int baselen;
2346 char *key;
2347 int do_not_match;
2348 regex_t *value_regex;
2349 int multi_replace;
2350 struct {
2351 size_t begin, end;
2352 enum config_event_t type;
2353 int is_keys_section;
2354 } *parsed;
2355 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2356 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2357 };
2358
2359 static void config_store_data_clear(struct config_store_data *store)
2360 {
2361 free(store->key);
2362 if (store->value_regex != NULL &&
2363 store->value_regex != CONFIG_REGEX_NONE) {
2364 regfree(store->value_regex);
2365 free(store->value_regex);
2366 }
2367 free(store->parsed);
2368 free(store->seen);
2369 memset(store, 0, sizeof(*store));
2370 }
2371
2372 static int matches(const char *key, const char *value,
2373 const struct config_store_data *store)
2374 {
2375 if (strcmp(key, store->key))
2376 return 0; /* not ours */
2377 if (!store->value_regex)
2378 return 1; /* always matches */
2379 if (store->value_regex == CONFIG_REGEX_NONE)
2380 return 0; /* never matches */
2381
2382 return store->do_not_match ^
2383 (value && !regexec(store->value_regex, value, 0, NULL, 0));
2384 }
2385
2386 static int store_aux_event(enum config_event_t type,
2387 size_t begin, size_t end, void *data)
2388 {
2389 struct config_store_data *store = data;
2390
2391 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2392 store->parsed[store->parsed_nr].begin = begin;
2393 store->parsed[store->parsed_nr].end = end;
2394 store->parsed[store->parsed_nr].type = type;
2395
2396 if (type == CONFIG_EVENT_SECTION) {
2397 int (*cmpfn)(const char *, const char *, size_t);
2398
2399 if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
2400 return error(_("invalid section name '%s'"), cf->var.buf);
2401
2402 if (cf->subsection_case_sensitive)
2403 cmpfn = strncasecmp;
2404 else
2405 cmpfn = strncmp;
2406
2407 /* Is this the section we were looking for? */
2408 store->is_keys_section =
2409 store->parsed[store->parsed_nr].is_keys_section =
2410 cf->var.len - 1 == store->baselen &&
2411 !cmpfn(cf->var.buf, store->key, store->baselen);
2412 if (store->is_keys_section) {
2413 store->section_seen = 1;
2414 ALLOC_GROW(store->seen, store->seen_nr + 1,
2415 store->seen_alloc);
2416 store->seen[store->seen_nr] = store->parsed_nr;
2417 }
2418 }
2419
2420 store->parsed_nr++;
2421
2422 return 0;
2423 }
2424
2425 static int store_aux(const char *key, const char *value, void *cb)
2426 {
2427 struct config_store_data *store = cb;
2428
2429 if (store->key_seen) {
2430 if (matches(key, value, store)) {
2431 if (store->seen_nr == 1 && store->multi_replace == 0) {
2432 warning(_("%s has multiple values"), key);
2433 }
2434
2435 ALLOC_GROW(store->seen, store->seen_nr + 1,
2436 store->seen_alloc);
2437
2438 store->seen[store->seen_nr] = store->parsed_nr;
2439 store->seen_nr++;
2440 }
2441 } else if (store->is_keys_section) {
2442 /*
2443 * Do not increment matches yet: this may not be a match, but we
2444 * are in the desired section.
2445 */
2446 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2447 store->seen[store->seen_nr] = store->parsed_nr;
2448 store->section_seen = 1;
2449
2450 if (matches(key, value, store)) {
2451 store->seen_nr++;
2452 store->key_seen = 1;
2453 }
2454 }
2455
2456 return 0;
2457 }
2458
2459 static int write_error(const char *filename)
2460 {
2461 error(_("failed to write new configuration file %s"), filename);
2462
2463 /* Same error code as "failed to rename". */
2464 return 4;
2465 }
2466
2467 static struct strbuf store_create_section(const char *key,
2468 const struct config_store_data *store)
2469 {
2470 const char *dot;
2471 int i;
2472 struct strbuf sb = STRBUF_INIT;
2473
2474 dot = memchr(key, '.', store->baselen);
2475 if (dot) {
2476 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2477 for (i = dot - key + 1; i < store->baselen; i++) {
2478 if (key[i] == '"' || key[i] == '\\')
2479 strbuf_addch(&sb, '\\');
2480 strbuf_addch(&sb, key[i]);
2481 }
2482 strbuf_addstr(&sb, "\"]\n");
2483 } else {
2484 strbuf_addf(&sb, "[%.*s]\n", store->baselen, key);
2485 }
2486
2487 return sb;
2488 }
2489
2490 static ssize_t write_section(int fd, const char *key,
2491 const struct config_store_data *store)
2492 {
2493 struct strbuf sb = store_create_section(key, store);
2494 ssize_t ret;
2495
2496 ret = write_in_full(fd, sb.buf, sb.len);
2497 strbuf_release(&sb);
2498
2499 return ret;
2500 }
2501
2502 static ssize_t write_pair(int fd, const char *key, const char *value,
2503 const struct config_store_data *store)
2504 {
2505 int i;
2506 ssize_t ret;
2507 int length = strlen(key + store->baselen + 1);
2508 const char *quote = "";
2509 struct strbuf sb = STRBUF_INIT;
2510
2511 /*
2512 * Check to see if the value needs to be surrounded with a dq pair.
2513 * Note that problematic characters are always backslash-quoted; this
2514 * check is about not losing leading or trailing SP and strings that
2515 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2516 * configuration parser.
2517 */
2518 if (value[0] == ' ')
2519 quote = "\"";
2520 for (i = 0; value[i]; i++)
2521 if (value[i] == ';' || value[i] == '#')
2522 quote = "\"";
2523 if (i && value[i - 1] == ' ')
2524 quote = "\"";
2525
2526 strbuf_addf(&sb, "\t%.*s = %s",
2527 length, key + store->baselen + 1, quote);
2528
2529 for (i = 0; value[i]; i++)
2530 switch (value[i]) {
2531 case '\n':
2532 strbuf_addstr(&sb, "\\n");
2533 break;
2534 case '\t':
2535 strbuf_addstr(&sb, "\\t");
2536 break;
2537 case '"':
2538 case '\\':
2539 strbuf_addch(&sb, '\\');
2540 /* fallthrough */
2541 default:
2542 strbuf_addch(&sb, value[i]);
2543 break;
2544 }
2545 strbuf_addf(&sb, "%s\n", quote);
2546
2547 ret = write_in_full(fd, sb.buf, sb.len);
2548 strbuf_release(&sb);
2549
2550 return ret;
2551 }
2552
2553 /*
2554 * If we are about to unset the last key(s) in a section, and if there are
2555 * no comments surrounding (or included in) the section, we will want to
2556 * extend begin/end to remove the entire section.
2557 *
2558 * Note: the parameter `seen_ptr` points to the index into the store.seen
2559 * array. * This index may be incremented if a section has more than one
2560 * entry (which all are to be removed).
2561 */
2562 static void maybe_remove_section(struct config_store_data *store,
2563 const char *contents,
2564 size_t *begin_offset, size_t *end_offset,
2565 int *seen_ptr)
2566 {
2567 size_t begin;
2568 int i, seen, section_seen = 0;
2569
2570 /*
2571 * First, ensure that this is the first key, and that there are no
2572 * comments before the entry nor before the section header.
2573 */
2574 seen = *seen_ptr;
2575 for (i = store->seen[seen]; i > 0; i--) {
2576 enum config_event_t type = store->parsed[i - 1].type;
2577
2578 if (type == CONFIG_EVENT_COMMENT)
2579 /* There is a comment before this entry or section */
2580 return;
2581 if (type == CONFIG_EVENT_ENTRY) {
2582 if (!section_seen)
2583 /* This is not the section's first entry. */
2584 return;
2585 /* We encountered no comment before the section. */
2586 break;
2587 }
2588 if (type == CONFIG_EVENT_SECTION) {
2589 if (!store->parsed[i - 1].is_keys_section)
2590 break;
2591 section_seen = 1;
2592 }
2593 }
2594 begin = store->parsed[i].begin;
2595
2596 /*
2597 * Next, make sure that we are removing he last key(s) in the section,
2598 * and that there are no comments that are possibly about the current
2599 * section.
2600 */
2601 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
2602 enum config_event_t type = store->parsed[i].type;
2603
2604 if (type == CONFIG_EVENT_COMMENT)
2605 return;
2606 if (type == CONFIG_EVENT_SECTION) {
2607 if (store->parsed[i].is_keys_section)
2608 continue;
2609 break;
2610 }
2611 if (type == CONFIG_EVENT_ENTRY) {
2612 if (++seen < store->seen_nr &&
2613 i == store->seen[seen])
2614 /* We want to remove this entry, too */
2615 continue;
2616 /* There is another entry in this section. */
2617 return;
2618 }
2619 }
2620
2621 /*
2622 * We are really removing the last entry/entries from this section, and
2623 * there are no enclosed or surrounding comments. Remove the entire,
2624 * now-empty section.
2625 */
2626 *seen_ptr = seen;
2627 *begin_offset = begin;
2628 if (i < store->parsed_nr)
2629 *end_offset = store->parsed[i].begin;
2630 else
2631 *end_offset = store->parsed[store->parsed_nr - 1].end;
2632 }
2633
2634 int git_config_set_in_file_gently(const char *config_filename,
2635 const char *key, const char *value)
2636 {
2637 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2638 }
2639
2640 void git_config_set_in_file(const char *config_filename,
2641 const char *key, const char *value)
2642 {
2643 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2644 }
2645
2646 int git_config_set_gently(const char *key, const char *value)
2647 {
2648 return git_config_set_multivar_gently(key, value, NULL, 0);
2649 }
2650
2651 void git_config_set(const char *key, const char *value)
2652 {
2653 git_config_set_multivar(key, value, NULL, 0);
2654 }
2655
2656 /*
2657 * If value==NULL, unset in (remove from) config,
2658 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2659 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2660 * (only add a new one)
2661 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2662 * else all matching key/values (regardless how many) are removed,
2663 * before the new pair is written.
2664 *
2665 * Returns 0 on success.
2666 *
2667 * This function does this:
2668 *
2669 * - it locks the config file by creating ".git/config.lock"
2670 *
2671 * - it then parses the config using store_aux() as validator to find
2672 * the position on the key/value pair to replace. If it is to be unset,
2673 * it must be found exactly once.
2674 *
2675 * - the config file is mmap()ed and the part before the match (if any) is
2676 * written to the lock file, then the changed part and the rest.
2677 *
2678 * - the config file is removed and the lock file rename()d to it.
2679 *
2680 */
2681 int git_config_set_multivar_in_file_gently(const char *config_filename,
2682 const char *key, const char *value,
2683 const char *value_regex,
2684 int multi_replace)
2685 {
2686 int fd = -1, in_fd = -1;
2687 int ret;
2688 struct lock_file lock = LOCK_INIT;
2689 char *filename_buf = NULL;
2690 char *contents = NULL;
2691 size_t contents_sz;
2692 struct config_store_data store;
2693
2694 memset(&store, 0, sizeof(store));
2695
2696 /* parse-key returns negative; flip the sign to feed exit(3) */
2697 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2698 if (ret)
2699 goto out_free;
2700
2701 store.multi_replace = multi_replace;
2702
2703 if (!config_filename)
2704 config_filename = filename_buf = git_pathdup("config");
2705
2706 /*
2707 * The lock serves a purpose in addition to locking: the new
2708 * contents of .git/config will be written into it.
2709 */
2710 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2711 if (fd < 0) {
2712 error_errno(_("could not lock config file %s"), config_filename);
2713 ret = CONFIG_NO_LOCK;
2714 goto out_free;
2715 }
2716
2717 /*
2718 * If .git/config does not exist yet, write a minimal version.
2719 */
2720 in_fd = open(config_filename, O_RDONLY);
2721 if ( in_fd < 0 ) {
2722 if ( ENOENT != errno ) {
2723 error_errno(_("opening %s"), config_filename);
2724 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2725 goto out_free;
2726 }
2727 /* if nothing to unset, error out */
2728 if (value == NULL) {
2729 ret = CONFIG_NOTHING_SET;
2730 goto out_free;
2731 }
2732
2733 free(store.key);
2734 store.key = xstrdup(key);
2735 if (write_section(fd, key, &store) < 0 ||
2736 write_pair(fd, key, value, &store) < 0)
2737 goto write_err_out;
2738 } else {
2739 struct stat st;
2740 size_t copy_begin, copy_end;
2741 int i, new_line = 0;
2742 struct config_options opts;
2743
2744 if (value_regex == NULL)
2745 store.value_regex = NULL;
2746 else if (value_regex == CONFIG_REGEX_NONE)
2747 store.value_regex = CONFIG_REGEX_NONE;
2748 else {
2749 if (value_regex[0] == '!') {
2750 store.do_not_match = 1;
2751 value_regex++;
2752 } else
2753 store.do_not_match = 0;
2754
2755 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2756 if (regcomp(store.value_regex, value_regex,
2757 REG_EXTENDED)) {
2758 error(_("invalid pattern: %s"), value_regex);
2759 FREE_AND_NULL(store.value_regex);
2760 ret = CONFIG_INVALID_PATTERN;
2761 goto out_free;
2762 }
2763 }
2764
2765 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
2766 store.parsed[0].end = 0;
2767
2768 memset(&opts, 0, sizeof(opts));
2769 opts.event_fn = store_aux_event;
2770 opts.event_fn_data = &store;
2771
2772 /*
2773 * After this, store.parsed will contain offsets of all the
2774 * parsed elements, and store.seen will contain a list of
2775 * matches, as indices into store.parsed.
2776 *
2777 * As a side effect, we make sure to transform only a valid
2778 * existing config file.
2779 */
2780 if (git_config_from_file_with_options(store_aux,
2781 config_filename,
2782 &store, &opts)) {
2783 error(_("invalid config file %s"), config_filename);
2784 ret = CONFIG_INVALID_FILE;
2785 goto out_free;
2786 }
2787
2788 /* if nothing to unset, or too many matches, error out */
2789 if ((store.seen_nr == 0 && value == NULL) ||
2790 (store.seen_nr > 1 && multi_replace == 0)) {
2791 ret = CONFIG_NOTHING_SET;
2792 goto out_free;
2793 }
2794
2795 if (fstat(in_fd, &st) == -1) {
2796 error_errno(_("fstat on %s failed"), config_filename);
2797 ret = CONFIG_INVALID_FILE;
2798 goto out_free;
2799 }
2800
2801 contents_sz = xsize_t(st.st_size);
2802 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2803 MAP_PRIVATE, in_fd, 0);
2804 if (contents == MAP_FAILED) {
2805 if (errno == ENODEV && S_ISDIR(st.st_mode))
2806 errno = EISDIR;
2807 error_errno(_("unable to mmap '%s'"), config_filename);
2808 ret = CONFIG_INVALID_FILE;
2809 contents = NULL;
2810 goto out_free;
2811 }
2812 close(in_fd);
2813 in_fd = -1;
2814
2815 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2816 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
2817 ret = CONFIG_NO_WRITE;
2818 goto out_free;
2819 }
2820
2821 if (store.seen_nr == 0) {
2822 if (!store.seen_alloc) {
2823 /* Did not see key nor section */
2824 ALLOC_GROW(store.seen, 1, store.seen_alloc);
2825 store.seen[0] = store.parsed_nr
2826 - !!store.parsed_nr;
2827 }
2828 store.seen_nr = 1;
2829 }
2830
2831 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
2832 size_t replace_end;
2833 int j = store.seen[i];
2834
2835 new_line = 0;
2836 if (!store.key_seen) {
2837 copy_end = store.parsed[j].end;
2838 /* include '\n' when copying section header */
2839 if (copy_end > 0 && copy_end < contents_sz &&
2840 contents[copy_end - 1] != '\n' &&
2841 contents[copy_end] == '\n')
2842 copy_end++;
2843 replace_end = copy_end;
2844 } else {
2845 replace_end = store.parsed[j].end;
2846 copy_end = store.parsed[j].begin;
2847 if (!value)
2848 maybe_remove_section(&store, contents,
2849 &copy_end,
2850 &replace_end, &i);
2851 /*
2852 * Swallow preceding white-space on the same
2853 * line.
2854 */
2855 while (copy_end > 0 ) {
2856 char c = contents[copy_end - 1];
2857
2858 if (isspace(c) && c != '\n')
2859 copy_end--;
2860 else
2861 break;
2862 }
2863 }
2864
2865 if (copy_end > 0 && contents[copy_end-1] != '\n')
2866 new_line = 1;
2867
2868 /* write the first part of the config */
2869 if (copy_end > copy_begin) {
2870 if (write_in_full(fd, contents + copy_begin,
2871 copy_end - copy_begin) < 0)
2872 goto write_err_out;
2873 if (new_line &&
2874 write_str_in_full(fd, "\n") < 0)
2875 goto write_err_out;
2876 }
2877 copy_begin = replace_end;
2878 }
2879
2880 /* write the pair (value == NULL means unset) */
2881 if (value != NULL) {
2882 if (!store.section_seen) {
2883 if (write_section(fd, key, &store) < 0)
2884 goto write_err_out;
2885 }
2886 if (write_pair(fd, key, value, &store) < 0)
2887 goto write_err_out;
2888 }
2889
2890 /* write the rest of the config */
2891 if (copy_begin < contents_sz)
2892 if (write_in_full(fd, contents + copy_begin,
2893 contents_sz - copy_begin) < 0)
2894 goto write_err_out;
2895
2896 munmap(contents, contents_sz);
2897 contents = NULL;
2898 }
2899
2900 if (commit_lock_file(&lock) < 0) {
2901 error_errno(_("could not write config file %s"), config_filename);
2902 ret = CONFIG_NO_WRITE;
2903 goto out_free;
2904 }
2905
2906 ret = 0;
2907
2908 /* Invalidate the config cache */
2909 git_config_clear();
2910
2911 out_free:
2912 rollback_lock_file(&lock);
2913 free(filename_buf);
2914 if (contents)
2915 munmap(contents, contents_sz);
2916 if (in_fd >= 0)
2917 close(in_fd);
2918 config_store_data_clear(&store);
2919 return ret;
2920
2921 write_err_out:
2922 ret = write_error(get_lock_file_path(&lock));
2923 goto out_free;
2924
2925 }
2926
2927 void git_config_set_multivar_in_file(const char *config_filename,
2928 const char *key, const char *value,
2929 const char *value_regex, int multi_replace)
2930 {
2931 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2932 value_regex, multi_replace))
2933 return;
2934 if (value)
2935 die(_("could not set '%s' to '%s'"), key, value);
2936 else
2937 die(_("could not unset '%s'"), key);
2938 }
2939
2940 int git_config_set_multivar_gently(const char *key, const char *value,
2941 const char *value_regex, int multi_replace)
2942 {
2943 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2944 multi_replace);
2945 }
2946
2947 void git_config_set_multivar(const char *key, const char *value,
2948 const char *value_regex, int multi_replace)
2949 {
2950 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2951 multi_replace);
2952 }
2953
2954 static int section_name_match (const char *buf, const char *name)
2955 {
2956 int i = 0, j = 0, dot = 0;
2957 if (buf[i] != '[')
2958 return 0;
2959 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2960 if (!dot && isspace(buf[i])) {
2961 dot = 1;
2962 if (name[j++] != '.')
2963 break;
2964 for (i++; isspace(buf[i]); i++)
2965 ; /* do nothing */
2966 if (buf[i] != '"')
2967 break;
2968 continue;
2969 }
2970 if (buf[i] == '\\' && dot)
2971 i++;
2972 else if (buf[i] == '"' && dot) {
2973 for (i++; isspace(buf[i]); i++)
2974 ; /* do_nothing */
2975 break;
2976 }
2977 if (buf[i] != name[j++])
2978 break;
2979 }
2980 if (buf[i] == ']' && name[j] == 0) {
2981 /*
2982 * We match, now just find the right length offset by
2983 * gobbling up any whitespace after it, as well
2984 */
2985 i++;
2986 for (; buf[i] && isspace(buf[i]); i++)
2987 ; /* do nothing */
2988 return i;
2989 }
2990 return 0;
2991 }
2992
2993 static int section_name_is_ok(const char *name)
2994 {
2995 /* Empty section names are bogus. */
2996 if (!*name)
2997 return 0;
2998
2999 /*
3000 * Before a dot, we must be alphanumeric or dash. After the first dot,
3001 * anything goes, so we can stop checking.
3002 */
3003 for (; *name && *name != '.'; name++)
3004 if (*name != '-' && !isalnum(*name))
3005 return 0;
3006 return 1;
3007 }
3008
3009 /* if new_name == NULL, the section is removed instead */
3010 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3011 const char *old_name,
3012 const char *new_name, int copy)
3013 {
3014 int ret = 0, remove = 0;
3015 char *filename_buf = NULL;
3016 struct lock_file lock = LOCK_INIT;
3017 int out_fd;
3018 char buf[1024];
3019 FILE *config_file = NULL;
3020 struct stat st;
3021 struct strbuf copystr = STRBUF_INIT;
3022 struct config_store_data store;
3023
3024 memset(&store, 0, sizeof(store));
3025
3026 if (new_name && !section_name_is_ok(new_name)) {
3027 ret = error(_("invalid section name: %s"), new_name);
3028 goto out_no_rollback;
3029 }
3030
3031 if (!config_filename)
3032 config_filename = filename_buf = git_pathdup("config");
3033
3034 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3035 if (out_fd < 0) {
3036 ret = error(_("could not lock config file %s"), config_filename);
3037 goto out;
3038 }
3039
3040 if (!(config_file = fopen(config_filename, "rb"))) {
3041 ret = warn_on_fopen_errors(config_filename);
3042 if (ret)
3043 goto out;
3044 /* no config file means nothing to rename, no error */
3045 goto commit_and_out;
3046 }
3047
3048 if (fstat(fileno(config_file), &st) == -1) {
3049 ret = error_errno(_("fstat on %s failed"), config_filename);
3050 goto out;
3051 }
3052
3053 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3054 ret = error_errno(_("chmod on %s failed"),
3055 get_lock_file_path(&lock));
3056 goto out;
3057 }
3058
3059 while (fgets(buf, sizeof(buf), config_file)) {
3060 int i;
3061 int length;
3062 int is_section = 0;
3063 char *output = buf;
3064 for (i = 0; buf[i] && isspace(buf[i]); i++)
3065 ; /* do nothing */
3066 if (buf[i] == '[') {
3067 /* it's a section */
3068 int offset;
3069 is_section = 1;
3070
3071 /*
3072 * When encountering a new section under -c we
3073 * need to flush out any section we're already
3074 * coping and begin anew. There might be
3075 * multiple [branch "$name"] sections.
3076 */
3077 if (copystr.len > 0) {
3078 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3079 ret = write_error(get_lock_file_path(&lock));
3080 goto out;
3081 }
3082 strbuf_reset(&copystr);
3083 }
3084
3085 offset = section_name_match(&buf[i], old_name);
3086 if (offset > 0) {
3087 ret++;
3088 if (new_name == NULL) {
3089 remove = 1;
3090 continue;
3091 }
3092 store.baselen = strlen(new_name);
3093 if (!copy) {
3094 if (write_section(out_fd, new_name, &store) < 0) {
3095 ret = write_error(get_lock_file_path(&lock));
3096 goto out;
3097 }
3098 /*
3099 * We wrote out the new section, with
3100 * a newline, now skip the old
3101 * section's length
3102 */
3103 output += offset + i;
3104 if (strlen(output) > 0) {
3105 /*
3106 * More content means there's
3107 * a declaration to put on the
3108 * next line; indent with a
3109 * tab
3110 */
3111 output -= 1;
3112 output[0] = '\t';
3113 }
3114 } else {
3115 copystr = store_create_section(new_name, &store);
3116 }
3117 }
3118 remove = 0;
3119 }
3120 if (remove)
3121 continue;
3122 length = strlen(output);
3123
3124 if (!is_section && copystr.len > 0) {
3125 strbuf_add(&copystr, output, length);
3126 }
3127
3128 if (write_in_full(out_fd, output, length) < 0) {
3129 ret = write_error(get_lock_file_path(&lock));
3130 goto out;
3131 }
3132 }
3133
3134 /*
3135 * Copy a trailing section at the end of the config, won't be
3136 * flushed by the usual "flush because we have a new section
3137 * logic in the loop above.
3138 */
3139 if (copystr.len > 0) {
3140 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3141 ret = write_error(get_lock_file_path(&lock));
3142 goto out;
3143 }
3144 strbuf_reset(&copystr);
3145 }
3146
3147 fclose(config_file);
3148 config_file = NULL;
3149 commit_and_out:
3150 if (commit_lock_file(&lock) < 0)
3151 ret = error_errno(_("could not write config file %s"),
3152 config_filename);
3153 out:
3154 if (config_file)
3155 fclose(config_file);
3156 rollback_lock_file(&lock);
3157 out_no_rollback:
3158 free(filename_buf);
3159 config_store_data_clear(&store);
3160 return ret;
3161 }
3162
3163 int git_config_rename_section_in_file(const char *config_filename,
3164 const char *old_name, const char *new_name)
3165 {
3166 return git_config_copy_or_rename_section_in_file(config_filename,
3167 old_name, new_name, 0);
3168 }
3169
3170 int git_config_rename_section(const char *old_name, const char *new_name)
3171 {
3172 return git_config_rename_section_in_file(NULL, old_name, new_name);
3173 }
3174
3175 int git_config_copy_section_in_file(const char *config_filename,
3176 const char *old_name, const char *new_name)
3177 {
3178 return git_config_copy_or_rename_section_in_file(config_filename,
3179 old_name, new_name, 1);
3180 }
3181
3182 int git_config_copy_section(const char *old_name, const char *new_name)
3183 {
3184 return git_config_copy_section_in_file(NULL, old_name, new_name);
3185 }
3186
3187 /*
3188 * Call this to report error for your variable that should not
3189 * get a boolean value (i.e. "[my] var" means "true").
3190 */
3191 #undef config_error_nonbool
3192 int config_error_nonbool(const char *var)
3193 {
3194 return error(_("missing value for '%s'"), var);
3195 }
3196
3197 int parse_config_key(const char *var,
3198 const char *section,
3199 const char **subsection, int *subsection_len,
3200 const char **key)
3201 {
3202 const char *dot;
3203
3204 /* Does it start with "section." ? */
3205 if (!skip_prefix(var, section, &var) || *var != '.')
3206 return -1;
3207
3208 /*
3209 * Find the key; we don't know yet if we have a subsection, but we must
3210 * parse backwards from the end, since the subsection may have dots in
3211 * it, too.
3212 */
3213 dot = strrchr(var, '.');
3214 *key = dot + 1;
3215
3216 /* Did we have a subsection at all? */
3217 if (dot == var) {
3218 if (subsection) {
3219 *subsection = NULL;
3220 *subsection_len = 0;
3221 }
3222 }
3223 else {
3224 if (!subsection)
3225 return -1;
3226 *subsection = var + 1;
3227 *subsection_len = dot - *subsection;
3228 }
3229
3230 return 0;
3231 }
3232
3233 const char *current_config_origin_type(void)
3234 {
3235 int type;
3236 if (current_config_kvi)
3237 type = current_config_kvi->origin_type;
3238 else if(cf)
3239 type = cf->origin_type;
3240 else
3241 BUG("current_config_origin_type called outside config callback");
3242
3243 switch (type) {
3244 case CONFIG_ORIGIN_BLOB:
3245 return "blob";
3246 case CONFIG_ORIGIN_FILE:
3247 return "file";
3248 case CONFIG_ORIGIN_STDIN:
3249 return "standard input";
3250 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3251 return "submodule-blob";
3252 case CONFIG_ORIGIN_CMDLINE:
3253 return "command line";
3254 default:
3255 BUG("unknown config origin type");
3256 }
3257 }
3258
3259 const char *current_config_name(void)
3260 {
3261 const char *name;
3262 if (current_config_kvi)
3263 name = current_config_kvi->filename;
3264 else if (cf)
3265 name = cf->name;
3266 else
3267 BUG("current_config_name called outside config callback");
3268 return name ? name : "";
3269 }
3270
3271 enum config_scope current_config_scope(void)
3272 {
3273 if (current_config_kvi)
3274 return current_config_kvi->scope;
3275 else
3276 return current_parsing_scope;
3277 }
3278
3279 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3280 {
3281 int i;
3282
3283 for (i = 0; i < nr_mapping; i++) {
3284 const char *name = mapping[i];
3285
3286 if (name && !strcasecmp(var, name))
3287 return i;
3288 }
3289 return -1;
3290 }