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