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