fsmonitor: teach git to optionally utilize a file system monitor to speed up detectin...
[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 "utf8.h"
18 #include "dir.h"
19 #include "color.h"
20
21 struct config_source {
22 struct config_source *prev;
23 union {
24 FILE *file;
25 struct config_buf {
26 const char *buf;
27 size_t len;
28 size_t pos;
29 } buf;
30 } u;
31 enum config_origin_type origin_type;
32 const char *name;
33 const char *path;
34 int die_on_error;
35 int linenr;
36 int eof;
37 struct strbuf value;
38 struct strbuf var;
39
40 int (*do_fgetc)(struct config_source *c);
41 int (*do_ungetc)(int c, struct config_source *conf);
42 long (*do_ftell)(struct config_source *c);
43 };
44
45 /*
46 * These variables record the "current" config source, which
47 * can be accessed by parsing callbacks.
48 *
49 * The "cf" variable will be non-NULL only when we are actually parsing a real
50 * config source (file, blob, cmdline, etc).
51 *
52 * The "current_config_kvi" variable will be non-NULL only when we are feeding
53 * cached config from a configset into a callback.
54 *
55 * They should generally never be non-NULL at the same time. If they are both
56 * NULL, then we aren't parsing anything (and depending on the function looking
57 * at the variables, it's either a bug for it to be called in the first place,
58 * or it's a function which can be reused for non-config purposes, and should
59 * fall back to some sane behavior).
60 */
61 static struct config_source *cf;
62 static struct key_value_info *current_config_kvi;
63
64 /*
65 * Similar to the variables above, this gives access to the "scope" of the
66 * current value (repo, global, etc). For cached values, it can be found via
67 * the current_config_kvi as above. During parsing, the current value can be
68 * found in this variable. It's not part of "cf" because it transcends a single
69 * file (i.e., a file included from .git/config is still in "repo" scope).
70 */
71 static enum config_scope current_parsing_scope;
72
73 static int core_compression_seen;
74 static int pack_compression_seen;
75 static int zlib_compression_seen;
76
77 static int config_file_fgetc(struct config_source *conf)
78 {
79 return getc_unlocked(conf->u.file);
80 }
81
82 static int config_file_ungetc(int c, struct config_source *conf)
83 {
84 return ungetc(c, conf->u.file);
85 }
86
87 static long config_file_ftell(struct config_source *conf)
88 {
89 return ftell(conf->u.file);
90 }
91
92
93 static int config_buf_fgetc(struct config_source *conf)
94 {
95 if (conf->u.buf.pos < conf->u.buf.len)
96 return conf->u.buf.buf[conf->u.buf.pos++];
97
98 return EOF;
99 }
100
101 static int config_buf_ungetc(int c, struct config_source *conf)
102 {
103 if (conf->u.buf.pos > 0) {
104 conf->u.buf.pos--;
105 if (conf->u.buf.buf[conf->u.buf.pos] != c)
106 die("BUG: config_buf can only ungetc the same character");
107 return c;
108 }
109
110 return EOF;
111 }
112
113 static long config_buf_ftell(struct config_source *conf)
114 {
115 return conf->u.buf.pos;
116 }
117
118 #define MAX_INCLUDE_DEPTH 10
119 static const char include_depth_advice[] =
120 "exceeded maximum include depth (%d) while including\n"
121 " %s\n"
122 "from\n"
123 " %s\n"
124 "Do you have circular includes?";
125 static int handle_path_include(const char *path, struct config_include_data *inc)
126 {
127 int ret = 0;
128 struct strbuf buf = STRBUF_INIT;
129 char *expanded;
130
131 if (!path)
132 return config_error_nonbool("include.path");
133
134 expanded = expand_user_path(path, 0);
135 if (!expanded)
136 return error("could not expand include path '%s'", path);
137 path = expanded;
138
139 /*
140 * Use an absolute path as-is, but interpret relative paths
141 * based on the including config file.
142 */
143 if (!is_absolute_path(path)) {
144 char *slash;
145
146 if (!cf || !cf->path)
147 return error("relative config includes must come from files");
148
149 slash = find_last_dir_sep(cf->path);
150 if (slash)
151 strbuf_add(&buf, cf->path, slash - cf->path + 1);
152 strbuf_addstr(&buf, path);
153 path = buf.buf;
154 }
155
156 if (!access_or_die(path, R_OK, 0)) {
157 if (++inc->depth > MAX_INCLUDE_DEPTH)
158 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
159 !cf ? "<unknown>" :
160 cf->name ? cf->name :
161 "the command line");
162 ret = git_config_from_file(git_config_include, path, inc);
163 inc->depth--;
164 }
165 strbuf_release(&buf);
166 free(expanded);
167 return ret;
168 }
169
170 static int prepare_include_condition_pattern(struct strbuf *pat)
171 {
172 struct strbuf path = STRBUF_INIT;
173 char *expanded;
174 int prefix = 0;
175
176 expanded = expand_user_path(pat->buf, 1);
177 if (expanded) {
178 strbuf_reset(pat);
179 strbuf_addstr(pat, expanded);
180 free(expanded);
181 }
182
183 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
184 const char *slash;
185
186 if (!cf || !cf->path)
187 return error(_("relative config include "
188 "conditionals must come from files"));
189
190 strbuf_realpath(&path, cf->path, 1);
191 slash = find_last_dir_sep(path.buf);
192 if (!slash)
193 die("BUG: how is this possible?");
194 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
195 prefix = slash - path.buf + 1 /* slash */;
196 } else if (!is_absolute_path(pat->buf))
197 strbuf_insert(pat, 0, "**/", 3);
198
199 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
200 strbuf_addstr(pat, "**");
201
202 strbuf_release(&path);
203 return prefix;
204 }
205
206 static int include_by_gitdir(const struct config_options *opts,
207 const char *cond, size_t cond_len, int icase)
208 {
209 struct strbuf text = STRBUF_INIT;
210 struct strbuf pattern = STRBUF_INIT;
211 int ret = 0, prefix;
212 const char *git_dir;
213 int already_tried_absolute = 0;
214
215 if (opts->git_dir)
216 git_dir = opts->git_dir;
217 else
218 goto done;
219
220 strbuf_realpath(&text, git_dir, 1);
221 strbuf_add(&pattern, cond, cond_len);
222 prefix = prepare_include_condition_pattern(&pattern);
223
224 again:
225 if (prefix < 0)
226 goto done;
227
228 if (prefix > 0) {
229 /*
230 * perform literal matching on the prefix part so that
231 * any wildcard character in it can't create side effects.
232 */
233 if (text.len < prefix)
234 goto done;
235 if (!icase && strncmp(pattern.buf, text.buf, prefix))
236 goto done;
237 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
238 goto done;
239 }
240
241 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
242 icase ? WM_CASEFOLD : 0);
243
244 if (!ret && !already_tried_absolute) {
245 /*
246 * We've tried e.g. matching gitdir:~/work, but if
247 * ~/work is a symlink to /mnt/storage/work
248 * strbuf_realpath() will expand it, so the rule won't
249 * match. Let's match against a
250 * strbuf_add_absolute_path() version of the path,
251 * which'll do the right thing
252 */
253 strbuf_reset(&text);
254 strbuf_add_absolute_path(&text, git_dir);
255 already_tried_absolute = 1;
256 goto again;
257 }
258 done:
259 strbuf_release(&pattern);
260 strbuf_release(&text);
261 return ret;
262 }
263
264 static int include_condition_is_true(const struct config_options *opts,
265 const char *cond, size_t cond_len)
266 {
267
268 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
269 return include_by_gitdir(opts, cond, cond_len, 0);
270 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
271 return include_by_gitdir(opts, cond, cond_len, 1);
272
273 /* unknown conditionals are always false */
274 return 0;
275 }
276
277 int git_config_include(const char *var, const char *value, void *data)
278 {
279 struct config_include_data *inc = data;
280 const char *cond, *key;
281 int cond_len;
282 int ret;
283
284 /*
285 * Pass along all values, including "include" directives; this makes it
286 * possible to query information on the includes themselves.
287 */
288 ret = inc->fn(var, value, inc->data);
289 if (ret < 0)
290 return ret;
291
292 if (!strcmp(var, "include.path"))
293 ret = handle_path_include(value, inc);
294
295 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
296 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
297 !strcmp(key, "path"))
298 ret = handle_path_include(value, inc);
299
300 return ret;
301 }
302
303 void git_config_push_parameter(const char *text)
304 {
305 struct strbuf env = STRBUF_INIT;
306 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
307 if (old && *old) {
308 strbuf_addstr(&env, old);
309 strbuf_addch(&env, ' ');
310 }
311 sq_quote_buf(&env, text);
312 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
313 strbuf_release(&env);
314 }
315
316 static inline int iskeychar(int c)
317 {
318 return isalnum(c) || c == '-';
319 }
320
321 /*
322 * Auxiliary function to sanity-check and split the key into the section
323 * identifier and variable name.
324 *
325 * Returns 0 on success, -1 when there is an invalid character in the key and
326 * -2 if there is no section name in the key.
327 *
328 * store_key - pointer to char* which will hold a copy of the key with
329 * lowercase section and variable name
330 * baselen - pointer to int which will hold the length of the
331 * section + subsection part, can be NULL
332 */
333 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
334 {
335 int i, dot, baselen;
336 const char *last_dot = strrchr(key, '.');
337
338 /*
339 * Since "key" actually contains the section name and the real
340 * key name separated by a dot, we have to know where the dot is.
341 */
342
343 if (last_dot == NULL || last_dot == key) {
344 if (!quiet)
345 error("key does not contain a section: %s", key);
346 return -CONFIG_NO_SECTION_OR_NAME;
347 }
348
349 if (!last_dot[1]) {
350 if (!quiet)
351 error("key does not contain variable name: %s", key);
352 return -CONFIG_NO_SECTION_OR_NAME;
353 }
354
355 baselen = last_dot - key;
356 if (baselen_)
357 *baselen_ = baselen;
358
359 /*
360 * Validate the key and while at it, lower case it for matching.
361 */
362 if (store_key)
363 *store_key = xmallocz(strlen(key));
364
365 dot = 0;
366 for (i = 0; key[i]; i++) {
367 unsigned char c = key[i];
368 if (c == '.')
369 dot = 1;
370 /* Leave the extended basename untouched.. */
371 if (!dot || i > baselen) {
372 if (!iskeychar(c) ||
373 (i == baselen + 1 && !isalpha(c))) {
374 if (!quiet)
375 error("invalid key: %s", key);
376 goto out_free_ret_1;
377 }
378 c = tolower(c);
379 } else if (c == '\n') {
380 if (!quiet)
381 error("invalid key (newline): %s", key);
382 goto out_free_ret_1;
383 }
384 if (store_key)
385 (*store_key)[i] = c;
386 }
387
388 return 0;
389
390 out_free_ret_1:
391 if (store_key) {
392 FREE_AND_NULL(*store_key);
393 }
394 return -CONFIG_INVALID_KEY;
395 }
396
397 int git_config_parse_key(const char *key, char **store_key, int *baselen)
398 {
399 return git_config_parse_key_1(key, store_key, baselen, 0);
400 }
401
402 int git_config_key_is_valid(const char *key)
403 {
404 return !git_config_parse_key_1(key, NULL, NULL, 1);
405 }
406
407 int git_config_parse_parameter(const char *text,
408 config_fn_t fn, void *data)
409 {
410 const char *value;
411 char *canonical_name;
412 struct strbuf **pair;
413 int ret;
414
415 pair = strbuf_split_str(text, '=', 2);
416 if (!pair[0])
417 return error("bogus config parameter: %s", text);
418
419 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
420 strbuf_setlen(pair[0], pair[0]->len - 1);
421 value = pair[1] ? pair[1]->buf : "";
422 } else {
423 value = NULL;
424 }
425
426 strbuf_trim(pair[0]);
427 if (!pair[0]->len) {
428 strbuf_list_free(pair);
429 return error("bogus config parameter: %s", text);
430 }
431
432 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
433 ret = -1;
434 } else {
435 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
436 free(canonical_name);
437 }
438 strbuf_list_free(pair);
439 return ret;
440 }
441
442 int git_config_from_parameters(config_fn_t fn, void *data)
443 {
444 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
445 int ret = 0;
446 char *envw;
447 const char **argv = NULL;
448 int nr = 0, alloc = 0;
449 int i;
450 struct config_source source;
451
452 if (!env)
453 return 0;
454
455 memset(&source, 0, sizeof(source));
456 source.prev = cf;
457 source.origin_type = CONFIG_ORIGIN_CMDLINE;
458 cf = &source;
459
460 /* sq_dequote will write over it */
461 envw = xstrdup(env);
462
463 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
464 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
465 goto out;
466 }
467
468 for (i = 0; i < nr; i++) {
469 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
470 ret = -1;
471 goto out;
472 }
473 }
474
475 out:
476 free(argv);
477 free(envw);
478 cf = source.prev;
479 return ret;
480 }
481
482 static int get_next_char(void)
483 {
484 int c = cf->do_fgetc(cf);
485
486 if (c == '\r') {
487 /* DOS like systems */
488 c = cf->do_fgetc(cf);
489 if (c != '\n') {
490 if (c != EOF)
491 cf->do_ungetc(c, cf);
492 c = '\r';
493 }
494 }
495 if (c == '\n')
496 cf->linenr++;
497 if (c == EOF) {
498 cf->eof = 1;
499 cf->linenr++;
500 c = '\n';
501 }
502 return c;
503 }
504
505 static char *parse_value(void)
506 {
507 int quote = 0, comment = 0, space = 0;
508
509 strbuf_reset(&cf->value);
510 for (;;) {
511 int c = get_next_char();
512 if (c == '\n') {
513 if (quote) {
514 cf->linenr--;
515 return NULL;
516 }
517 return cf->value.buf;
518 }
519 if (comment)
520 continue;
521 if (isspace(c) && !quote) {
522 if (cf->value.len)
523 space++;
524 continue;
525 }
526 if (!quote) {
527 if (c == ';' || c == '#') {
528 comment = 1;
529 continue;
530 }
531 }
532 for (; space; space--)
533 strbuf_addch(&cf->value, ' ');
534 if (c == '\\') {
535 c = get_next_char();
536 switch (c) {
537 case '\n':
538 continue;
539 case 't':
540 c = '\t';
541 break;
542 case 'b':
543 c = '\b';
544 break;
545 case 'n':
546 c = '\n';
547 break;
548 /* Some characters escape as themselves */
549 case '\\': case '"':
550 break;
551 /* Reject unknown escape sequences */
552 default:
553 return NULL;
554 }
555 strbuf_addch(&cf->value, c);
556 continue;
557 }
558 if (c == '"') {
559 quote = 1-quote;
560 continue;
561 }
562 strbuf_addch(&cf->value, c);
563 }
564 }
565
566 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
567 {
568 int c;
569 char *value;
570 int ret;
571
572 /* Get the full name */
573 for (;;) {
574 c = get_next_char();
575 if (cf->eof)
576 break;
577 if (!iskeychar(c))
578 break;
579 strbuf_addch(name, tolower(c));
580 }
581
582 while (c == ' ' || c == '\t')
583 c = get_next_char();
584
585 value = NULL;
586 if (c != '\n') {
587 if (c != '=')
588 return -1;
589 value = parse_value();
590 if (!value)
591 return -1;
592 }
593 /*
594 * We already consumed the \n, but we need linenr to point to
595 * the line we just parsed during the call to fn to get
596 * accurate line number in error messages.
597 */
598 cf->linenr--;
599 ret = fn(name->buf, value, data);
600 if (ret >= 0)
601 cf->linenr++;
602 return ret;
603 }
604
605 static int get_extended_base_var(struct strbuf *name, int c)
606 {
607 do {
608 if (c == '\n')
609 goto error_incomplete_line;
610 c = get_next_char();
611 } while (isspace(c));
612
613 /* We require the format to be '[base "extension"]' */
614 if (c != '"')
615 return -1;
616 strbuf_addch(name, '.');
617
618 for (;;) {
619 int c = get_next_char();
620 if (c == '\n')
621 goto error_incomplete_line;
622 if (c == '"')
623 break;
624 if (c == '\\') {
625 c = get_next_char();
626 if (c == '\n')
627 goto error_incomplete_line;
628 }
629 strbuf_addch(name, c);
630 }
631
632 /* Final ']' */
633 if (get_next_char() != ']')
634 return -1;
635 return 0;
636 error_incomplete_line:
637 cf->linenr--;
638 return -1;
639 }
640
641 static int get_base_var(struct strbuf *name)
642 {
643 for (;;) {
644 int c = get_next_char();
645 if (cf->eof)
646 return -1;
647 if (c == ']')
648 return 0;
649 if (isspace(c))
650 return get_extended_base_var(name, c);
651 if (!iskeychar(c) && c != '.')
652 return -1;
653 strbuf_addch(name, tolower(c));
654 }
655 }
656
657 static int git_parse_source(config_fn_t fn, void *data)
658 {
659 int comment = 0;
660 int baselen = 0;
661 struct strbuf *var = &cf->var;
662 int error_return = 0;
663 char *error_msg = NULL;
664
665 /* U+FEFF Byte Order Mark in UTF8 */
666 const char *bomptr = utf8_bom;
667
668 for (;;) {
669 int c = get_next_char();
670 if (bomptr && *bomptr) {
671 /* We are at the file beginning; skip UTF8-encoded BOM
672 * if present. Sane editors won't put this in on their
673 * own, but e.g. Windows Notepad will do it happily. */
674 if (c == (*bomptr & 0377)) {
675 bomptr++;
676 continue;
677 } else {
678 /* Do not tolerate partial BOM. */
679 if (bomptr != utf8_bom)
680 break;
681 /* No BOM at file beginning. Cool. */
682 bomptr = NULL;
683 }
684 }
685 if (c == '\n') {
686 if (cf->eof)
687 return 0;
688 comment = 0;
689 continue;
690 }
691 if (comment || isspace(c))
692 continue;
693 if (c == '#' || c == ';') {
694 comment = 1;
695 continue;
696 }
697 if (c == '[') {
698 /* Reset prior to determining a new stem */
699 strbuf_reset(var);
700 if (get_base_var(var) < 0 || var->len < 1)
701 break;
702 strbuf_addch(var, '.');
703 baselen = var->len;
704 continue;
705 }
706 if (!isalpha(c))
707 break;
708 /*
709 * Truncate the var name back to the section header
710 * stem prior to grabbing the suffix part of the name
711 * and the value.
712 */
713 strbuf_setlen(var, baselen);
714 strbuf_addch(var, tolower(c));
715 if (get_value(fn, data, var) < 0)
716 break;
717 }
718
719 switch (cf->origin_type) {
720 case CONFIG_ORIGIN_BLOB:
721 error_msg = xstrfmt(_("bad config line %d in blob %s"),
722 cf->linenr, cf->name);
723 break;
724 case CONFIG_ORIGIN_FILE:
725 error_msg = xstrfmt(_("bad config line %d in file %s"),
726 cf->linenr, cf->name);
727 break;
728 case CONFIG_ORIGIN_STDIN:
729 error_msg = xstrfmt(_("bad config line %d in standard input"),
730 cf->linenr);
731 break;
732 case CONFIG_ORIGIN_SUBMODULE_BLOB:
733 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
734 cf->linenr, cf->name);
735 break;
736 case CONFIG_ORIGIN_CMDLINE:
737 error_msg = xstrfmt(_("bad config line %d in command line %s"),
738 cf->linenr, cf->name);
739 break;
740 default:
741 error_msg = xstrfmt(_("bad config line %d in %s"),
742 cf->linenr, cf->name);
743 }
744
745 if (cf->die_on_error)
746 die("%s", error_msg);
747 else
748 error_return = error("%s", error_msg);
749
750 free(error_msg);
751 return error_return;
752 }
753
754 static int parse_unit_factor(const char *end, uintmax_t *val)
755 {
756 if (!*end)
757 return 1;
758 else if (!strcasecmp(end, "k")) {
759 *val *= 1024;
760 return 1;
761 }
762 else if (!strcasecmp(end, "m")) {
763 *val *= 1024 * 1024;
764 return 1;
765 }
766 else if (!strcasecmp(end, "g")) {
767 *val *= 1024 * 1024 * 1024;
768 return 1;
769 }
770 return 0;
771 }
772
773 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
774 {
775 if (value && *value) {
776 char *end;
777 intmax_t val;
778 uintmax_t uval;
779 uintmax_t factor = 1;
780
781 errno = 0;
782 val = strtoimax(value, &end, 0);
783 if (errno == ERANGE)
784 return 0;
785 if (!parse_unit_factor(end, &factor)) {
786 errno = EINVAL;
787 return 0;
788 }
789 uval = labs(val);
790 uval *= factor;
791 if (uval > max || labs(val) > uval) {
792 errno = ERANGE;
793 return 0;
794 }
795 val *= factor;
796 *ret = val;
797 return 1;
798 }
799 errno = EINVAL;
800 return 0;
801 }
802
803 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
804 {
805 if (value && *value) {
806 char *end;
807 uintmax_t val;
808 uintmax_t oldval;
809
810 errno = 0;
811 val = strtoumax(value, &end, 0);
812 if (errno == ERANGE)
813 return 0;
814 oldval = val;
815 if (!parse_unit_factor(end, &val)) {
816 errno = EINVAL;
817 return 0;
818 }
819 if (val > max || oldval > val) {
820 errno = ERANGE;
821 return 0;
822 }
823 *ret = val;
824 return 1;
825 }
826 errno = EINVAL;
827 return 0;
828 }
829
830 static int git_parse_int(const char *value, int *ret)
831 {
832 intmax_t tmp;
833 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
834 return 0;
835 *ret = tmp;
836 return 1;
837 }
838
839 static int git_parse_int64(const char *value, int64_t *ret)
840 {
841 intmax_t tmp;
842 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
843 return 0;
844 *ret = tmp;
845 return 1;
846 }
847
848 int git_parse_ulong(const char *value, unsigned long *ret)
849 {
850 uintmax_t tmp;
851 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
852 return 0;
853 *ret = tmp;
854 return 1;
855 }
856
857 static int git_parse_ssize_t(const char *value, ssize_t *ret)
858 {
859 intmax_t tmp;
860 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
861 return 0;
862 *ret = tmp;
863 return 1;
864 }
865
866 NORETURN
867 static void die_bad_number(const char *name, const char *value)
868 {
869 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
870
871 if (!value)
872 value = "";
873
874 if (!(cf && cf->name))
875 die(_("bad numeric config value '%s' for '%s': %s"),
876 value, name, error_type);
877
878 switch (cf->origin_type) {
879 case CONFIG_ORIGIN_BLOB:
880 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
881 value, name, cf->name, error_type);
882 case CONFIG_ORIGIN_FILE:
883 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
884 value, name, cf->name, error_type);
885 case CONFIG_ORIGIN_STDIN:
886 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
887 value, name, error_type);
888 case CONFIG_ORIGIN_SUBMODULE_BLOB:
889 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
890 value, name, cf->name, error_type);
891 case CONFIG_ORIGIN_CMDLINE:
892 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
893 value, name, cf->name, error_type);
894 default:
895 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
896 value, name, cf->name, error_type);
897 }
898 }
899
900 int git_config_int(const char *name, const char *value)
901 {
902 int ret;
903 if (!git_parse_int(value, &ret))
904 die_bad_number(name, value);
905 return ret;
906 }
907
908 int64_t git_config_int64(const char *name, const char *value)
909 {
910 int64_t ret;
911 if (!git_parse_int64(value, &ret))
912 die_bad_number(name, value);
913 return ret;
914 }
915
916 unsigned long git_config_ulong(const char *name, const char *value)
917 {
918 unsigned long ret;
919 if (!git_parse_ulong(value, &ret))
920 die_bad_number(name, value);
921 return ret;
922 }
923
924 ssize_t git_config_ssize_t(const char *name, const char *value)
925 {
926 ssize_t ret;
927 if (!git_parse_ssize_t(value, &ret))
928 die_bad_number(name, value);
929 return ret;
930 }
931
932 static int git_parse_maybe_bool_text(const char *value)
933 {
934 if (!value)
935 return 1;
936 if (!*value)
937 return 0;
938 if (!strcasecmp(value, "true")
939 || !strcasecmp(value, "yes")
940 || !strcasecmp(value, "on"))
941 return 1;
942 if (!strcasecmp(value, "false")
943 || !strcasecmp(value, "no")
944 || !strcasecmp(value, "off"))
945 return 0;
946 return -1;
947 }
948
949 int git_parse_maybe_bool(const char *value)
950 {
951 int v = git_parse_maybe_bool_text(value);
952 if (0 <= v)
953 return v;
954 if (git_parse_int(value, &v))
955 return !!v;
956 return -1;
957 }
958
959 int git_config_maybe_bool(const char *name, const char *value)
960 {
961 return git_parse_maybe_bool(value);
962 }
963
964 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
965 {
966 int v = git_parse_maybe_bool_text(value);
967 if (0 <= v) {
968 *is_bool = 1;
969 return v;
970 }
971 *is_bool = 0;
972 return git_config_int(name, value);
973 }
974
975 int git_config_bool(const char *name, const char *value)
976 {
977 int discard;
978 return !!git_config_bool_or_int(name, value, &discard);
979 }
980
981 int git_config_string(const char **dest, const char *var, const char *value)
982 {
983 if (!value)
984 return config_error_nonbool(var);
985 *dest = xstrdup(value);
986 return 0;
987 }
988
989 int git_config_pathname(const char **dest, const char *var, const char *value)
990 {
991 if (!value)
992 return config_error_nonbool(var);
993 *dest = expand_user_path(value, 0);
994 if (!*dest)
995 die(_("failed to expand user dir in: '%s'"), value);
996 return 0;
997 }
998
999 static int git_default_core_config(const char *var, const char *value)
1000 {
1001 /* This needs a better name */
1002 if (!strcmp(var, "core.filemode")) {
1003 trust_executable_bit = git_config_bool(var, value);
1004 return 0;
1005 }
1006 if (!strcmp(var, "core.trustctime")) {
1007 trust_ctime = git_config_bool(var, value);
1008 return 0;
1009 }
1010 if (!strcmp(var, "core.checkstat")) {
1011 if (!strcasecmp(value, "default"))
1012 check_stat = 1;
1013 else if (!strcasecmp(value, "minimal"))
1014 check_stat = 0;
1015 }
1016
1017 if (!strcmp(var, "core.quotepath")) {
1018 quote_path_fully = git_config_bool(var, value);
1019 return 0;
1020 }
1021
1022 if (!strcmp(var, "core.symlinks")) {
1023 has_symlinks = git_config_bool(var, value);
1024 return 0;
1025 }
1026
1027 if (!strcmp(var, "core.ignorecase")) {
1028 ignore_case = git_config_bool(var, value);
1029 return 0;
1030 }
1031
1032 if (!strcmp(var, "core.attributesfile"))
1033 return git_config_pathname(&git_attributes_file, var, value);
1034
1035 if (!strcmp(var, "core.hookspath"))
1036 return git_config_pathname(&git_hooks_path, var, value);
1037
1038 if (!strcmp(var, "core.bare")) {
1039 is_bare_repository_cfg = git_config_bool(var, value);
1040 return 0;
1041 }
1042
1043 if (!strcmp(var, "core.ignorestat")) {
1044 assume_unchanged = git_config_bool(var, value);
1045 return 0;
1046 }
1047
1048 if (!strcmp(var, "core.prefersymlinkrefs")) {
1049 prefer_symlink_refs = git_config_bool(var, value);
1050 return 0;
1051 }
1052
1053 if (!strcmp(var, "core.logallrefupdates")) {
1054 if (value && !strcasecmp(value, "always"))
1055 log_all_ref_updates = LOG_REFS_ALWAYS;
1056 else if (git_config_bool(var, value))
1057 log_all_ref_updates = LOG_REFS_NORMAL;
1058 else
1059 log_all_ref_updates = LOG_REFS_NONE;
1060 return 0;
1061 }
1062
1063 if (!strcmp(var, "core.warnambiguousrefs")) {
1064 warn_ambiguous_refs = git_config_bool(var, value);
1065 return 0;
1066 }
1067
1068 if (!strcmp(var, "core.abbrev")) {
1069 if (!value)
1070 return config_error_nonbool(var);
1071 if (!strcasecmp(value, "auto"))
1072 default_abbrev = -1;
1073 else {
1074 int abbrev = git_config_int(var, value);
1075 if (abbrev < minimum_abbrev || abbrev > 40)
1076 return error("abbrev length out of range: %d", abbrev);
1077 default_abbrev = abbrev;
1078 }
1079 return 0;
1080 }
1081
1082 if (!strcmp(var, "core.disambiguate"))
1083 return set_disambiguate_hint_config(var, value);
1084
1085 if (!strcmp(var, "core.loosecompression")) {
1086 int level = git_config_int(var, value);
1087 if (level == -1)
1088 level = Z_DEFAULT_COMPRESSION;
1089 else if (level < 0 || level > Z_BEST_COMPRESSION)
1090 die(_("bad zlib compression level %d"), level);
1091 zlib_compression_level = level;
1092 zlib_compression_seen = 1;
1093 return 0;
1094 }
1095
1096 if (!strcmp(var, "core.compression")) {
1097 int level = git_config_int(var, value);
1098 if (level == -1)
1099 level = Z_DEFAULT_COMPRESSION;
1100 else if (level < 0 || level > Z_BEST_COMPRESSION)
1101 die(_("bad zlib compression level %d"), level);
1102 core_compression_level = level;
1103 core_compression_seen = 1;
1104 if (!zlib_compression_seen)
1105 zlib_compression_level = level;
1106 if (!pack_compression_seen)
1107 pack_compression_level = level;
1108 return 0;
1109 }
1110
1111 if (!strcmp(var, "core.packedgitwindowsize")) {
1112 int pgsz_x2 = getpagesize() * 2;
1113 packed_git_window_size = git_config_ulong(var, value);
1114
1115 /* This value must be multiple of (pagesize * 2) */
1116 packed_git_window_size /= pgsz_x2;
1117 if (packed_git_window_size < 1)
1118 packed_git_window_size = 1;
1119 packed_git_window_size *= pgsz_x2;
1120 return 0;
1121 }
1122
1123 if (!strcmp(var, "core.bigfilethreshold")) {
1124 big_file_threshold = git_config_ulong(var, value);
1125 return 0;
1126 }
1127
1128 if (!strcmp(var, "core.packedgitlimit")) {
1129 packed_git_limit = git_config_ulong(var, value);
1130 return 0;
1131 }
1132
1133 if (!strcmp(var, "core.deltabasecachelimit")) {
1134 delta_base_cache_limit = git_config_ulong(var, value);
1135 return 0;
1136 }
1137
1138 if (!strcmp(var, "core.autocrlf")) {
1139 if (value && !strcasecmp(value, "input")) {
1140 auto_crlf = AUTO_CRLF_INPUT;
1141 return 0;
1142 }
1143 auto_crlf = git_config_bool(var, value);
1144 return 0;
1145 }
1146
1147 if (!strcmp(var, "core.safecrlf")) {
1148 if (value && !strcasecmp(value, "warn")) {
1149 safe_crlf = SAFE_CRLF_WARN;
1150 return 0;
1151 }
1152 safe_crlf = git_config_bool(var, value);
1153 return 0;
1154 }
1155
1156 if (!strcmp(var, "core.eol")) {
1157 if (value && !strcasecmp(value, "lf"))
1158 core_eol = EOL_LF;
1159 else if (value && !strcasecmp(value, "crlf"))
1160 core_eol = EOL_CRLF;
1161 else if (value && !strcasecmp(value, "native"))
1162 core_eol = EOL_NATIVE;
1163 else
1164 core_eol = EOL_UNSET;
1165 return 0;
1166 }
1167
1168 if (!strcmp(var, "core.notesref")) {
1169 notes_ref_name = xstrdup(value);
1170 return 0;
1171 }
1172
1173 if (!strcmp(var, "core.editor"))
1174 return git_config_string(&editor_program, var, value);
1175
1176 if (!strcmp(var, "core.commentchar")) {
1177 if (!value)
1178 return config_error_nonbool(var);
1179 else if (!strcasecmp(value, "auto"))
1180 auto_comment_line_char = 1;
1181 else if (value[0] && !value[1]) {
1182 comment_line_char = value[0];
1183 auto_comment_line_char = 0;
1184 } else
1185 return error("core.commentChar should only be one character");
1186 return 0;
1187 }
1188
1189 if (!strcmp(var, "core.askpass"))
1190 return git_config_string(&askpass_program, var, value);
1191
1192 if (!strcmp(var, "core.excludesfile"))
1193 return git_config_pathname(&excludes_file, var, value);
1194
1195 if (!strcmp(var, "core.whitespace")) {
1196 if (!value)
1197 return config_error_nonbool(var);
1198 whitespace_rule_cfg = parse_whitespace_rule(value);
1199 return 0;
1200 }
1201
1202 if (!strcmp(var, "core.fsyncobjectfiles")) {
1203 fsync_object_files = git_config_bool(var, value);
1204 return 0;
1205 }
1206
1207 if (!strcmp(var, "core.preloadindex")) {
1208 core_preload_index = git_config_bool(var, value);
1209 return 0;
1210 }
1211
1212 if (!strcmp(var, "core.createobject")) {
1213 if (!strcmp(value, "rename"))
1214 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1215 else if (!strcmp(value, "link"))
1216 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1217 else
1218 die(_("invalid mode for object creation: %s"), value);
1219 return 0;
1220 }
1221
1222 if (!strcmp(var, "core.sparsecheckout")) {
1223 core_apply_sparse_checkout = git_config_bool(var, value);
1224 return 0;
1225 }
1226
1227 if (!strcmp(var, "core.precomposeunicode")) {
1228 precomposed_unicode = git_config_bool(var, value);
1229 return 0;
1230 }
1231
1232 if (!strcmp(var, "core.protecthfs")) {
1233 protect_hfs = git_config_bool(var, value);
1234 return 0;
1235 }
1236
1237 if (!strcmp(var, "core.protectntfs")) {
1238 protect_ntfs = git_config_bool(var, value);
1239 return 0;
1240 }
1241
1242 if (!strcmp(var, "core.hidedotfiles")) {
1243 if (value && !strcasecmp(value, "dotgitonly"))
1244 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1245 else
1246 hide_dotfiles = git_config_bool(var, value);
1247 return 0;
1248 }
1249
1250 /* Add other config variables here and to Documentation/config.txt. */
1251 return 0;
1252 }
1253
1254 static int git_default_i18n_config(const char *var, const char *value)
1255 {
1256 if (!strcmp(var, "i18n.commitencoding"))
1257 return git_config_string(&git_commit_encoding, var, value);
1258
1259 if (!strcmp(var, "i18n.logoutputencoding"))
1260 return git_config_string(&git_log_output_encoding, var, value);
1261
1262 /* Add other config variables here and to Documentation/config.txt. */
1263 return 0;
1264 }
1265
1266 static int git_default_branch_config(const char *var, const char *value)
1267 {
1268 if (!strcmp(var, "branch.autosetupmerge")) {
1269 if (value && !strcasecmp(value, "always")) {
1270 git_branch_track = BRANCH_TRACK_ALWAYS;
1271 return 0;
1272 }
1273 git_branch_track = git_config_bool(var, value);
1274 return 0;
1275 }
1276 if (!strcmp(var, "branch.autosetuprebase")) {
1277 if (!value)
1278 return config_error_nonbool(var);
1279 else if (!strcmp(value, "never"))
1280 autorebase = AUTOREBASE_NEVER;
1281 else if (!strcmp(value, "local"))
1282 autorebase = AUTOREBASE_LOCAL;
1283 else if (!strcmp(value, "remote"))
1284 autorebase = AUTOREBASE_REMOTE;
1285 else if (!strcmp(value, "always"))
1286 autorebase = AUTOREBASE_ALWAYS;
1287 else
1288 return error("malformed value for %s", var);
1289 return 0;
1290 }
1291
1292 /* Add other config variables here and to Documentation/config.txt. */
1293 return 0;
1294 }
1295
1296 static int git_default_push_config(const char *var, const char *value)
1297 {
1298 if (!strcmp(var, "push.default")) {
1299 if (!value)
1300 return config_error_nonbool(var);
1301 else if (!strcmp(value, "nothing"))
1302 push_default = PUSH_DEFAULT_NOTHING;
1303 else if (!strcmp(value, "matching"))
1304 push_default = PUSH_DEFAULT_MATCHING;
1305 else if (!strcmp(value, "simple"))
1306 push_default = PUSH_DEFAULT_SIMPLE;
1307 else if (!strcmp(value, "upstream"))
1308 push_default = PUSH_DEFAULT_UPSTREAM;
1309 else if (!strcmp(value, "tracking")) /* deprecated */
1310 push_default = PUSH_DEFAULT_UPSTREAM;
1311 else if (!strcmp(value, "current"))
1312 push_default = PUSH_DEFAULT_CURRENT;
1313 else {
1314 error("malformed value for %s: %s", var, value);
1315 return error("Must be one of nothing, matching, simple, "
1316 "upstream or current.");
1317 }
1318 return 0;
1319 }
1320
1321 /* Add other config variables here and to Documentation/config.txt. */
1322 return 0;
1323 }
1324
1325 static int git_default_mailmap_config(const char *var, const char *value)
1326 {
1327 if (!strcmp(var, "mailmap.file"))
1328 return git_config_pathname(&git_mailmap_file, var, value);
1329 if (!strcmp(var, "mailmap.blob"))
1330 return git_config_string(&git_mailmap_blob, var, value);
1331
1332 /* Add other config variables here and to Documentation/config.txt. */
1333 return 0;
1334 }
1335
1336 int git_default_config(const char *var, const char *value, void *dummy)
1337 {
1338 if (starts_with(var, "core."))
1339 return git_default_core_config(var, value);
1340
1341 if (starts_with(var, "user."))
1342 return git_ident_config(var, value, dummy);
1343
1344 if (starts_with(var, "i18n."))
1345 return git_default_i18n_config(var, value);
1346
1347 if (starts_with(var, "branch."))
1348 return git_default_branch_config(var, value);
1349
1350 if (starts_with(var, "push."))
1351 return git_default_push_config(var, value);
1352
1353 if (starts_with(var, "mailmap."))
1354 return git_default_mailmap_config(var, value);
1355
1356 if (starts_with(var, "advice."))
1357 return git_default_advice_config(var, value);
1358
1359 if (git_color_config(var, value, dummy) < 0)
1360 return -1;
1361
1362 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1363 pager_use_color = git_config_bool(var,value);
1364 return 0;
1365 }
1366
1367 if (!strcmp(var, "pack.packsizelimit")) {
1368 pack_size_limit_cfg = git_config_ulong(var, value);
1369 return 0;
1370 }
1371
1372 if (!strcmp(var, "pack.compression")) {
1373 int level = git_config_int(var, value);
1374 if (level == -1)
1375 level = Z_DEFAULT_COMPRESSION;
1376 else if (level < 0 || level > Z_BEST_COMPRESSION)
1377 die(_("bad pack compression level %d"), level);
1378 pack_compression_level = level;
1379 pack_compression_seen = 1;
1380 return 0;
1381 }
1382
1383 /* Add other config variables here and to Documentation/config.txt. */
1384 return 0;
1385 }
1386
1387 /*
1388 * All source specific fields in the union, die_on_error, name and the callbacks
1389 * fgetc, ungetc, ftell of top need to be initialized before calling
1390 * this function.
1391 */
1392 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1393 {
1394 int ret;
1395
1396 /* push config-file parsing state stack */
1397 top->prev = cf;
1398 top->linenr = 1;
1399 top->eof = 0;
1400 strbuf_init(&top->value, 1024);
1401 strbuf_init(&top->var, 1024);
1402 cf = top;
1403
1404 ret = git_parse_source(fn, data);
1405
1406 /* pop config-file parsing state stack */
1407 strbuf_release(&top->value);
1408 strbuf_release(&top->var);
1409 cf = top->prev;
1410
1411 return ret;
1412 }
1413
1414 static int do_config_from_file(config_fn_t fn,
1415 const enum config_origin_type origin_type,
1416 const char *name, const char *path, FILE *f,
1417 void *data)
1418 {
1419 struct config_source top;
1420
1421 top.u.file = f;
1422 top.origin_type = origin_type;
1423 top.name = name;
1424 top.path = path;
1425 top.die_on_error = 1;
1426 top.do_fgetc = config_file_fgetc;
1427 top.do_ungetc = config_file_ungetc;
1428 top.do_ftell = config_file_ftell;
1429
1430 return do_config_from(&top, fn, data);
1431 }
1432
1433 static int git_config_from_stdin(config_fn_t fn, void *data)
1434 {
1435 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1436 }
1437
1438 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1439 {
1440 int ret = -1;
1441 FILE *f;
1442
1443 f = fopen_or_warn(filename, "r");
1444 if (f) {
1445 flockfile(f);
1446 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1447 funlockfile(f);
1448 fclose(f);
1449 }
1450 return ret;
1451 }
1452
1453 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1454 const char *name, const char *buf, size_t len, void *data)
1455 {
1456 struct config_source top;
1457
1458 top.u.buf.buf = buf;
1459 top.u.buf.len = len;
1460 top.u.buf.pos = 0;
1461 top.origin_type = origin_type;
1462 top.name = name;
1463 top.path = NULL;
1464 top.die_on_error = 0;
1465 top.do_fgetc = config_buf_fgetc;
1466 top.do_ungetc = config_buf_ungetc;
1467 top.do_ftell = config_buf_ftell;
1468
1469 return do_config_from(&top, fn, data);
1470 }
1471
1472 int git_config_from_blob_oid(config_fn_t fn,
1473 const char *name,
1474 const struct object_id *oid,
1475 void *data)
1476 {
1477 enum object_type type;
1478 char *buf;
1479 unsigned long size;
1480 int ret;
1481
1482 buf = read_sha1_file(oid->hash, &type, &size);
1483 if (!buf)
1484 return error("unable to load config blob object '%s'", name);
1485 if (type != OBJ_BLOB) {
1486 free(buf);
1487 return error("reference '%s' does not point to a blob", name);
1488 }
1489
1490 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1491 free(buf);
1492
1493 return ret;
1494 }
1495
1496 static int git_config_from_blob_ref(config_fn_t fn,
1497 const char *name,
1498 void *data)
1499 {
1500 struct object_id oid;
1501
1502 if (get_oid(name, &oid) < 0)
1503 return error("unable to resolve config blob '%s'", name);
1504 return git_config_from_blob_oid(fn, name, &oid, data);
1505 }
1506
1507 const char *git_etc_gitconfig(void)
1508 {
1509 static const char *system_wide;
1510 if (!system_wide)
1511 system_wide = system_path(ETC_GITCONFIG);
1512 return system_wide;
1513 }
1514
1515 /*
1516 * Parse environment variable 'k' as a boolean (in various
1517 * possible spellings); if missing, use the default value 'def'.
1518 */
1519 int git_env_bool(const char *k, int def)
1520 {
1521 const char *v = getenv(k);
1522 return v ? git_config_bool(k, v) : def;
1523 }
1524
1525 /*
1526 * Parse environment variable 'k' as ulong with possibly a unit
1527 * suffix; if missing, use the default value 'val'.
1528 */
1529 unsigned long git_env_ulong(const char *k, unsigned long val)
1530 {
1531 const char *v = getenv(k);
1532 if (v && !git_parse_ulong(v, &val))
1533 die("failed to parse %s", k);
1534 return val;
1535 }
1536
1537 int git_config_system(void)
1538 {
1539 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1540 }
1541
1542 static int do_git_config_sequence(const struct config_options *opts,
1543 config_fn_t fn, void *data)
1544 {
1545 int ret = 0;
1546 char *xdg_config = xdg_config_home("config");
1547 char *user_config = expand_user_path("~/.gitconfig", 0);
1548 char *repo_config;
1549
1550 if (opts->commondir)
1551 repo_config = mkpathdup("%s/config", opts->commondir);
1552 else
1553 repo_config = NULL;
1554
1555 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1556 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1557 ret += git_config_from_file(fn, git_etc_gitconfig(),
1558 data);
1559
1560 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1561 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1562 ret += git_config_from_file(fn, xdg_config, data);
1563
1564 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1565 ret += git_config_from_file(fn, user_config, data);
1566
1567 current_parsing_scope = CONFIG_SCOPE_REPO;
1568 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1569 ret += git_config_from_file(fn, repo_config, data);
1570
1571 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1572 if (git_config_from_parameters(fn, data) < 0)
1573 die(_("unable to parse command-line config"));
1574
1575 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1576 free(xdg_config);
1577 free(user_config);
1578 free(repo_config);
1579 return ret;
1580 }
1581
1582 int config_with_options(config_fn_t fn, void *data,
1583 struct git_config_source *config_source,
1584 const struct config_options *opts)
1585 {
1586 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1587
1588 if (opts->respect_includes) {
1589 inc.fn = fn;
1590 inc.data = data;
1591 inc.opts = opts;
1592 fn = git_config_include;
1593 data = &inc;
1594 }
1595
1596 /*
1597 * If we have a specific filename, use it. Otherwise, follow the
1598 * regular lookup sequence.
1599 */
1600 if (config_source && config_source->use_stdin)
1601 return git_config_from_stdin(fn, data);
1602 else if (config_source && config_source->file)
1603 return git_config_from_file(fn, config_source->file, data);
1604 else if (config_source && config_source->blob)
1605 return git_config_from_blob_ref(fn, config_source->blob, data);
1606
1607 return do_git_config_sequence(opts, fn, data);
1608 }
1609
1610 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1611 {
1612 int i, value_index;
1613 struct string_list *values;
1614 struct config_set_element *entry;
1615 struct configset_list *list = &cs->list;
1616
1617 for (i = 0; i < list->nr; i++) {
1618 entry = list->items[i].e;
1619 value_index = list->items[i].value_index;
1620 values = &entry->value_list;
1621
1622 current_config_kvi = values->items[value_index].util;
1623
1624 if (fn(entry->key, values->items[value_index].string, data) < 0)
1625 git_die_config_linenr(entry->key,
1626 current_config_kvi->filename,
1627 current_config_kvi->linenr);
1628
1629 current_config_kvi = NULL;
1630 }
1631 }
1632
1633 void read_early_config(config_fn_t cb, void *data)
1634 {
1635 struct config_options opts = {0};
1636 struct strbuf commondir = STRBUF_INIT;
1637 struct strbuf gitdir = STRBUF_INIT;
1638
1639 opts.respect_includes = 1;
1640
1641 if (have_git_dir()) {
1642 opts.commondir = get_git_common_dir();
1643 opts.git_dir = get_git_dir();
1644 /*
1645 * When setup_git_directory() was not yet asked to discover the
1646 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1647 * is any repository config we should use (but unlike
1648 * setup_git_directory_gently(), no global state is changed, most
1649 * notably, the current working directory is still the same after the
1650 * call).
1651 */
1652 } else if (!discover_git_directory(&commondir, &gitdir)) {
1653 opts.commondir = commondir.buf;
1654 opts.git_dir = gitdir.buf;
1655 }
1656
1657 config_with_options(cb, data, NULL, &opts);
1658
1659 strbuf_release(&commondir);
1660 strbuf_release(&gitdir);
1661 }
1662
1663 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1664 {
1665 struct config_set_element k;
1666 struct config_set_element *found_entry;
1667 char *normalized_key;
1668 /*
1669 * `key` may come from the user, so normalize it before using it
1670 * for querying entries from the hashmap.
1671 */
1672 if (git_config_parse_key(key, &normalized_key, NULL))
1673 return NULL;
1674
1675 hashmap_entry_init(&k, strhash(normalized_key));
1676 k.key = normalized_key;
1677 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1678 free(normalized_key);
1679 return found_entry;
1680 }
1681
1682 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1683 {
1684 struct config_set_element *e;
1685 struct string_list_item *si;
1686 struct configset_list_item *l_item;
1687 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1688
1689 e = configset_find_element(cs, key);
1690 /*
1691 * Since the keys are being fed by git_config*() callback mechanism, they
1692 * are already normalized. So simply add them without any further munging.
1693 */
1694 if (!e) {
1695 e = xmalloc(sizeof(*e));
1696 hashmap_entry_init(e, strhash(key));
1697 e->key = xstrdup(key);
1698 string_list_init(&e->value_list, 1);
1699 hashmap_add(&cs->config_hash, e);
1700 }
1701 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1702
1703 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1704 l_item = &cs->list.items[cs->list.nr++];
1705 l_item->e = e;
1706 l_item->value_index = e->value_list.nr - 1;
1707
1708 if (!cf)
1709 die("BUG: configset_add_value has no source");
1710 if (cf->name) {
1711 kv_info->filename = strintern(cf->name);
1712 kv_info->linenr = cf->linenr;
1713 kv_info->origin_type = cf->origin_type;
1714 } else {
1715 /* for values read from `git_config_from_parameters()` */
1716 kv_info->filename = NULL;
1717 kv_info->linenr = -1;
1718 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1719 }
1720 kv_info->scope = current_parsing_scope;
1721 si->util = kv_info;
1722
1723 return 0;
1724 }
1725
1726 static int config_set_element_cmp(const void *unused_cmp_data,
1727 const void *entry,
1728 const void *entry_or_key,
1729 const void *unused_keydata)
1730 {
1731 const struct config_set_element *e1 = entry;
1732 const struct config_set_element *e2 = entry_or_key;
1733
1734 return strcmp(e1->key, e2->key);
1735 }
1736
1737 void git_configset_init(struct config_set *cs)
1738 {
1739 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1740 cs->hash_initialized = 1;
1741 cs->list.nr = 0;
1742 cs->list.alloc = 0;
1743 cs->list.items = NULL;
1744 }
1745
1746 void git_configset_clear(struct config_set *cs)
1747 {
1748 struct config_set_element *entry;
1749 struct hashmap_iter iter;
1750 if (!cs->hash_initialized)
1751 return;
1752
1753 hashmap_iter_init(&cs->config_hash, &iter);
1754 while ((entry = hashmap_iter_next(&iter))) {
1755 free(entry->key);
1756 string_list_clear(&entry->value_list, 1);
1757 }
1758 hashmap_free(&cs->config_hash, 1);
1759 cs->hash_initialized = 0;
1760 free(cs->list.items);
1761 cs->list.nr = 0;
1762 cs->list.alloc = 0;
1763 cs->list.items = NULL;
1764 }
1765
1766 static int config_set_callback(const char *key, const char *value, void *cb)
1767 {
1768 struct config_set *cs = cb;
1769 configset_add_value(cs, key, value);
1770 return 0;
1771 }
1772
1773 int git_configset_add_file(struct config_set *cs, const char *filename)
1774 {
1775 return git_config_from_file(config_set_callback, filename, cs);
1776 }
1777
1778 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1779 {
1780 const struct string_list *values = NULL;
1781 /*
1782 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1783 * queried key in the files of the configset, the value returned will be the last
1784 * value in the value list for that key.
1785 */
1786 values = git_configset_get_value_multi(cs, key);
1787
1788 if (!values)
1789 return 1;
1790 assert(values->nr > 0);
1791 *value = values->items[values->nr - 1].string;
1792 return 0;
1793 }
1794
1795 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1796 {
1797 struct config_set_element *e = configset_find_element(cs, key);
1798 return e ? &e->value_list : NULL;
1799 }
1800
1801 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1802 {
1803 const char *value;
1804 if (!git_configset_get_value(cs, key, &value))
1805 return git_config_string(dest, key, value);
1806 else
1807 return 1;
1808 }
1809
1810 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1811 {
1812 return git_configset_get_string_const(cs, key, (const char **)dest);
1813 }
1814
1815 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1816 {
1817 const char *value;
1818 if (!git_configset_get_value(cs, key, &value)) {
1819 *dest = git_config_int(key, value);
1820 return 0;
1821 } else
1822 return 1;
1823 }
1824
1825 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1826 {
1827 const char *value;
1828 if (!git_configset_get_value(cs, key, &value)) {
1829 *dest = git_config_ulong(key, value);
1830 return 0;
1831 } else
1832 return 1;
1833 }
1834
1835 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1836 {
1837 const char *value;
1838 if (!git_configset_get_value(cs, key, &value)) {
1839 *dest = git_config_bool(key, value);
1840 return 0;
1841 } else
1842 return 1;
1843 }
1844
1845 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1846 int *is_bool, int *dest)
1847 {
1848 const char *value;
1849 if (!git_configset_get_value(cs, key, &value)) {
1850 *dest = git_config_bool_or_int(key, value, is_bool);
1851 return 0;
1852 } else
1853 return 1;
1854 }
1855
1856 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1857 {
1858 const char *value;
1859 if (!git_configset_get_value(cs, key, &value)) {
1860 *dest = git_parse_maybe_bool(value);
1861 if (*dest == -1)
1862 return -1;
1863 return 0;
1864 } else
1865 return 1;
1866 }
1867
1868 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1869 {
1870 const char *value;
1871 if (!git_configset_get_value(cs, key, &value))
1872 return git_config_pathname(dest, key, value);
1873 else
1874 return 1;
1875 }
1876
1877 /* Functions use to read configuration from a repository */
1878 static void repo_read_config(struct repository *repo)
1879 {
1880 struct config_options opts;
1881
1882 opts.respect_includes = 1;
1883 opts.commondir = repo->commondir;
1884 opts.git_dir = repo->gitdir;
1885
1886 if (!repo->config)
1887 repo->config = xcalloc(1, sizeof(struct config_set));
1888 else
1889 git_configset_clear(repo->config);
1890
1891 git_configset_init(repo->config);
1892
1893 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1894 /*
1895 * config_with_options() normally returns only
1896 * zero, as most errors are fatal, and
1897 * non-fatal potential errors are guarded by "if"
1898 * statements that are entered only when no error is
1899 * possible.
1900 *
1901 * If we ever encounter a non-fatal error, it means
1902 * something went really wrong and we should stop
1903 * immediately.
1904 */
1905 die(_("unknown error occurred while reading the configuration files"));
1906 }
1907
1908 static void git_config_check_init(struct repository *repo)
1909 {
1910 if (repo->config && repo->config->hash_initialized)
1911 return;
1912 repo_read_config(repo);
1913 }
1914
1915 static void repo_config_clear(struct repository *repo)
1916 {
1917 if (!repo->config || !repo->config->hash_initialized)
1918 return;
1919 git_configset_clear(repo->config);
1920 }
1921
1922 void repo_config(struct repository *repo, config_fn_t fn, void *data)
1923 {
1924 git_config_check_init(repo);
1925 configset_iter(repo->config, fn, data);
1926 }
1927
1928 int repo_config_get_value(struct repository *repo,
1929 const char *key, const char **value)
1930 {
1931 git_config_check_init(repo);
1932 return git_configset_get_value(repo->config, key, value);
1933 }
1934
1935 const struct string_list *repo_config_get_value_multi(struct repository *repo,
1936 const char *key)
1937 {
1938 git_config_check_init(repo);
1939 return git_configset_get_value_multi(repo->config, key);
1940 }
1941
1942 int repo_config_get_string_const(struct repository *repo,
1943 const char *key, const char **dest)
1944 {
1945 int ret;
1946 git_config_check_init(repo);
1947 ret = git_configset_get_string_const(repo->config, key, dest);
1948 if (ret < 0)
1949 git_die_config(key, NULL);
1950 return ret;
1951 }
1952
1953 int repo_config_get_string(struct repository *repo,
1954 const char *key, char **dest)
1955 {
1956 git_config_check_init(repo);
1957 return repo_config_get_string_const(repo, key, (const char **)dest);
1958 }
1959
1960 int repo_config_get_int(struct repository *repo,
1961 const char *key, int *dest)
1962 {
1963 git_config_check_init(repo);
1964 return git_configset_get_int(repo->config, key, dest);
1965 }
1966
1967 int repo_config_get_ulong(struct repository *repo,
1968 const char *key, unsigned long *dest)
1969 {
1970 git_config_check_init(repo);
1971 return git_configset_get_ulong(repo->config, key, dest);
1972 }
1973
1974 int repo_config_get_bool(struct repository *repo,
1975 const char *key, int *dest)
1976 {
1977 git_config_check_init(repo);
1978 return git_configset_get_bool(repo->config, key, dest);
1979 }
1980
1981 int repo_config_get_bool_or_int(struct repository *repo,
1982 const char *key, int *is_bool, int *dest)
1983 {
1984 git_config_check_init(repo);
1985 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
1986 }
1987
1988 int repo_config_get_maybe_bool(struct repository *repo,
1989 const char *key, int *dest)
1990 {
1991 git_config_check_init(repo);
1992 return git_configset_get_maybe_bool(repo->config, key, dest);
1993 }
1994
1995 int repo_config_get_pathname(struct repository *repo,
1996 const char *key, const char **dest)
1997 {
1998 int ret;
1999 git_config_check_init(repo);
2000 ret = git_configset_get_pathname(repo->config, key, dest);
2001 if (ret < 0)
2002 git_die_config(key, NULL);
2003 return ret;
2004 }
2005
2006 /* Functions used historically to read configuration from 'the_repository' */
2007 void git_config(config_fn_t fn, void *data)
2008 {
2009 repo_config(the_repository, fn, data);
2010 }
2011
2012 void git_config_clear(void)
2013 {
2014 repo_config_clear(the_repository);
2015 }
2016
2017 int git_config_get_value(const char *key, const char **value)
2018 {
2019 return repo_config_get_value(the_repository, key, value);
2020 }
2021
2022 const struct string_list *git_config_get_value_multi(const char *key)
2023 {
2024 return repo_config_get_value_multi(the_repository, key);
2025 }
2026
2027 int git_config_get_string_const(const char *key, const char **dest)
2028 {
2029 return repo_config_get_string_const(the_repository, key, dest);
2030 }
2031
2032 int git_config_get_string(const char *key, char **dest)
2033 {
2034 return repo_config_get_string(the_repository, key, dest);
2035 }
2036
2037 int git_config_get_int(const char *key, int *dest)
2038 {
2039 return repo_config_get_int(the_repository, key, dest);
2040 }
2041
2042 int git_config_get_ulong(const char *key, unsigned long *dest)
2043 {
2044 return repo_config_get_ulong(the_repository, key, dest);
2045 }
2046
2047 int git_config_get_bool(const char *key, int *dest)
2048 {
2049 return repo_config_get_bool(the_repository, key, dest);
2050 }
2051
2052 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2053 {
2054 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2055 }
2056
2057 int git_config_get_maybe_bool(const char *key, int *dest)
2058 {
2059 return repo_config_get_maybe_bool(the_repository, key, dest);
2060 }
2061
2062 int git_config_get_pathname(const char *key, const char **dest)
2063 {
2064 return repo_config_get_pathname(the_repository, key, dest);
2065 }
2066
2067 /*
2068 * Note: This function exists solely to maintain backward compatibility with
2069 * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
2070 * NOT be used anywhere else.
2071 *
2072 * Runs the provided config function on the '.gitmodules' file found in the
2073 * working directory.
2074 */
2075 void config_from_gitmodules(config_fn_t fn, void *data)
2076 {
2077 if (the_repository->worktree) {
2078 char *file = repo_worktree_path(the_repository, GITMODULES_FILE);
2079 git_config_from_file(fn, file, data);
2080 free(file);
2081 }
2082 }
2083
2084 int git_config_get_expiry(const char *key, const char **output)
2085 {
2086 int ret = git_config_get_string_const(key, output);
2087 if (ret)
2088 return ret;
2089 if (strcmp(*output, "now")) {
2090 timestamp_t now = approxidate("now");
2091 if (approxidate(*output) >= now)
2092 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2093 }
2094 return ret;
2095 }
2096
2097 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2098 {
2099 char *expiry_string;
2100 intmax_t days;
2101 timestamp_t when;
2102
2103 if (git_config_get_string(key, &expiry_string))
2104 return 1; /* no such thing */
2105
2106 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2107 const int scale = 86400;
2108 *expiry = now - days * scale;
2109 return 0;
2110 }
2111
2112 if (!parse_expiry_date(expiry_string, &when)) {
2113 *expiry = when;
2114 return 0;
2115 }
2116 return -1; /* thing exists but cannot be parsed */
2117 }
2118
2119 int git_config_get_untracked_cache(void)
2120 {
2121 int val = -1;
2122 const char *v;
2123
2124 /* Hack for test programs like test-dump-untracked-cache */
2125 if (ignore_untracked_cache_config)
2126 return -1;
2127
2128 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2129 return val;
2130
2131 if (!git_config_get_value("core.untrackedcache", &v)) {
2132 if (!strcasecmp(v, "keep"))
2133 return -1;
2134
2135 error(_("unknown core.untrackedCache value '%s'; "
2136 "using 'keep' default value"), v);
2137 return -1;
2138 }
2139
2140 return -1; /* default value */
2141 }
2142
2143 int git_config_get_split_index(void)
2144 {
2145 int val;
2146
2147 if (!git_config_get_maybe_bool("core.splitindex", &val))
2148 return val;
2149
2150 return -1; /* default value */
2151 }
2152
2153 int git_config_get_max_percent_split_change(void)
2154 {
2155 int val = -1;
2156
2157 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2158 if (0 <= val && val <= 100)
2159 return val;
2160
2161 return error(_("splitIndex.maxPercentChange value '%d' "
2162 "should be between 0 and 100"), val);
2163 }
2164
2165 return -1; /* default value */
2166 }
2167
2168 int git_config_get_fsmonitor(void)
2169 {
2170 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2171 core_fsmonitor = getenv("GIT_FSMONITOR_TEST");
2172
2173 if (core_fsmonitor && !*core_fsmonitor)
2174 core_fsmonitor = NULL;
2175
2176 if (core_fsmonitor)
2177 return 1;
2178
2179 return 0;
2180 }
2181
2182 NORETURN
2183 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2184 {
2185 if (!filename)
2186 die(_("unable to parse '%s' from command-line config"), key);
2187 else
2188 die(_("bad config variable '%s' in file '%s' at line %d"),
2189 key, filename, linenr);
2190 }
2191
2192 NORETURN __attribute__((format(printf, 2, 3)))
2193 void git_die_config(const char *key, const char *err, ...)
2194 {
2195 const struct string_list *values;
2196 struct key_value_info *kv_info;
2197
2198 if (err) {
2199 va_list params;
2200 va_start(params, err);
2201 vreportf("error: ", err, params);
2202 va_end(params);
2203 }
2204 values = git_config_get_value_multi(key);
2205 kv_info = values->items[values->nr - 1].util;
2206 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2207 }
2208
2209 /*
2210 * Find all the stuff for git_config_set() below.
2211 */
2212
2213 static struct {
2214 int baselen;
2215 char *key;
2216 int do_not_match;
2217 regex_t *value_regex;
2218 int multi_replace;
2219 size_t *offset;
2220 unsigned int offset_alloc;
2221 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2222 int seen;
2223 } store;
2224
2225 static int matches(const char *key, const char *value)
2226 {
2227 if (strcmp(key, store.key))
2228 return 0; /* not ours */
2229 if (!store.value_regex)
2230 return 1; /* always matches */
2231 if (store.value_regex == CONFIG_REGEX_NONE)
2232 return 0; /* never matches */
2233
2234 return store.do_not_match ^
2235 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2236 }
2237
2238 static int store_aux(const char *key, const char *value, void *cb)
2239 {
2240 const char *ep;
2241 size_t section_len;
2242
2243 switch (store.state) {
2244 case KEY_SEEN:
2245 if (matches(key, value)) {
2246 if (store.seen == 1 && store.multi_replace == 0) {
2247 warning(_("%s has multiple values"), key);
2248 }
2249
2250 ALLOC_GROW(store.offset, store.seen + 1,
2251 store.offset_alloc);
2252
2253 store.offset[store.seen] = cf->do_ftell(cf);
2254 store.seen++;
2255 }
2256 break;
2257 case SECTION_SEEN:
2258 /*
2259 * What we are looking for is in store.key (both
2260 * section and var), and its section part is baselen
2261 * long. We found key (again, both section and var).
2262 * We would want to know if this key is in the same
2263 * section as what we are looking for. We already
2264 * know we are in the same section as what should
2265 * hold store.key.
2266 */
2267 ep = strrchr(key, '.');
2268 section_len = ep - key;
2269
2270 if ((section_len != store.baselen) ||
2271 memcmp(key, store.key, section_len+1)) {
2272 store.state = SECTION_END_SEEN;
2273 break;
2274 }
2275
2276 /*
2277 * Do not increment matches: this is no match, but we
2278 * just made sure we are in the desired section.
2279 */
2280 ALLOC_GROW(store.offset, store.seen + 1,
2281 store.offset_alloc);
2282 store.offset[store.seen] = cf->do_ftell(cf);
2283 /* fallthru */
2284 case SECTION_END_SEEN:
2285 case START:
2286 if (matches(key, value)) {
2287 ALLOC_GROW(store.offset, store.seen + 1,
2288 store.offset_alloc);
2289 store.offset[store.seen] = cf->do_ftell(cf);
2290 store.state = KEY_SEEN;
2291 store.seen++;
2292 } else {
2293 if (strrchr(key, '.') - key == store.baselen &&
2294 !strncmp(key, store.key, store.baselen)) {
2295 store.state = SECTION_SEEN;
2296 ALLOC_GROW(store.offset,
2297 store.seen + 1,
2298 store.offset_alloc);
2299 store.offset[store.seen] = cf->do_ftell(cf);
2300 }
2301 }
2302 }
2303 return 0;
2304 }
2305
2306 static int write_error(const char *filename)
2307 {
2308 error("failed to write new configuration file %s", filename);
2309
2310 /* Same error code as "failed to rename". */
2311 return 4;
2312 }
2313
2314 static int store_write_section(int fd, const char *key)
2315 {
2316 const char *dot;
2317 int i, success;
2318 struct strbuf sb = STRBUF_INIT;
2319
2320 dot = memchr(key, '.', store.baselen);
2321 if (dot) {
2322 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2323 for (i = dot - key + 1; i < store.baselen; i++) {
2324 if (key[i] == '"' || key[i] == '\\')
2325 strbuf_addch(&sb, '\\');
2326 strbuf_addch(&sb, key[i]);
2327 }
2328 strbuf_addstr(&sb, "\"]\n");
2329 } else {
2330 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2331 }
2332
2333 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2334 strbuf_release(&sb);
2335
2336 return success;
2337 }
2338
2339 static int store_write_pair(int fd, const char *key, const char *value)
2340 {
2341 int i, success;
2342 int length = strlen(key + store.baselen + 1);
2343 const char *quote = "";
2344 struct strbuf sb = STRBUF_INIT;
2345
2346 /*
2347 * Check to see if the value needs to be surrounded with a dq pair.
2348 * Note that problematic characters are always backslash-quoted; this
2349 * check is about not losing leading or trailing SP and strings that
2350 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2351 * configuration parser.
2352 */
2353 if (value[0] == ' ')
2354 quote = "\"";
2355 for (i = 0; value[i]; i++)
2356 if (value[i] == ';' || value[i] == '#')
2357 quote = "\"";
2358 if (i && value[i - 1] == ' ')
2359 quote = "\"";
2360
2361 strbuf_addf(&sb, "\t%.*s = %s",
2362 length, key + store.baselen + 1, quote);
2363
2364 for (i = 0; value[i]; i++)
2365 switch (value[i]) {
2366 case '\n':
2367 strbuf_addstr(&sb, "\\n");
2368 break;
2369 case '\t':
2370 strbuf_addstr(&sb, "\\t");
2371 break;
2372 case '"':
2373 case '\\':
2374 strbuf_addch(&sb, '\\');
2375 default:
2376 strbuf_addch(&sb, value[i]);
2377 break;
2378 }
2379 strbuf_addf(&sb, "%s\n", quote);
2380
2381 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2382 strbuf_release(&sb);
2383
2384 return success;
2385 }
2386
2387 static ssize_t find_beginning_of_line(const char *contents, size_t size,
2388 size_t offset_, int *found_bracket)
2389 {
2390 size_t equal_offset = size, bracket_offset = size;
2391 ssize_t offset;
2392
2393 contline:
2394 for (offset = offset_-2; offset > 0
2395 && contents[offset] != '\n'; offset--)
2396 switch (contents[offset]) {
2397 case '=': equal_offset = offset; break;
2398 case ']': bracket_offset = offset; break;
2399 }
2400 if (offset > 0 && contents[offset-1] == '\\') {
2401 offset_ = offset;
2402 goto contline;
2403 }
2404 if (bracket_offset < equal_offset) {
2405 *found_bracket = 1;
2406 offset = bracket_offset+1;
2407 } else
2408 offset++;
2409
2410 return offset;
2411 }
2412
2413 int git_config_set_in_file_gently(const char *config_filename,
2414 const char *key, const char *value)
2415 {
2416 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2417 }
2418
2419 void git_config_set_in_file(const char *config_filename,
2420 const char *key, const char *value)
2421 {
2422 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2423 }
2424
2425 int git_config_set_gently(const char *key, const char *value)
2426 {
2427 return git_config_set_multivar_gently(key, value, NULL, 0);
2428 }
2429
2430 void git_config_set(const char *key, const char *value)
2431 {
2432 git_config_set_multivar(key, value, NULL, 0);
2433 }
2434
2435 /*
2436 * If value==NULL, unset in (remove from) config,
2437 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2438 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2439 * (only add a new one)
2440 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2441 * else all matching key/values (regardless how many) are removed,
2442 * before the new pair is written.
2443 *
2444 * Returns 0 on success.
2445 *
2446 * This function does this:
2447 *
2448 * - it locks the config file by creating ".git/config.lock"
2449 *
2450 * - it then parses the config using store_aux() as validator to find
2451 * the position on the key/value pair to replace. If it is to be unset,
2452 * it must be found exactly once.
2453 *
2454 * - the config file is mmap()ed and the part before the match (if any) is
2455 * written to the lock file, then the changed part and the rest.
2456 *
2457 * - the config file is removed and the lock file rename()d to it.
2458 *
2459 */
2460 int git_config_set_multivar_in_file_gently(const char *config_filename,
2461 const char *key, const char *value,
2462 const char *value_regex,
2463 int multi_replace)
2464 {
2465 int fd = -1, in_fd = -1;
2466 int ret;
2467 struct lock_file *lock = NULL;
2468 char *filename_buf = NULL;
2469 char *contents = NULL;
2470 size_t contents_sz;
2471
2472 /* parse-key returns negative; flip the sign to feed exit(3) */
2473 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2474 if (ret)
2475 goto out_free;
2476
2477 store.multi_replace = multi_replace;
2478
2479 if (!config_filename)
2480 config_filename = filename_buf = git_pathdup("config");
2481
2482 /*
2483 * The lock serves a purpose in addition to locking: the new
2484 * contents of .git/config will be written into it.
2485 */
2486 lock = xcalloc(1, sizeof(struct lock_file));
2487 fd = hold_lock_file_for_update(lock, config_filename, 0);
2488 if (fd < 0) {
2489 error_errno("could not lock config file %s", config_filename);
2490 free(store.key);
2491 ret = CONFIG_NO_LOCK;
2492 goto out_free;
2493 }
2494
2495 /*
2496 * If .git/config does not exist yet, write a minimal version.
2497 */
2498 in_fd = open(config_filename, O_RDONLY);
2499 if ( in_fd < 0 ) {
2500 free(store.key);
2501
2502 if ( ENOENT != errno ) {
2503 error_errno("opening %s", config_filename);
2504 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2505 goto out_free;
2506 }
2507 /* if nothing to unset, error out */
2508 if (value == NULL) {
2509 ret = CONFIG_NOTHING_SET;
2510 goto out_free;
2511 }
2512
2513 store.key = (char *)key;
2514 if (!store_write_section(fd, key) ||
2515 !store_write_pair(fd, key, value))
2516 goto write_err_out;
2517 } else {
2518 struct stat st;
2519 size_t copy_begin, copy_end;
2520 int i, new_line = 0;
2521
2522 if (value_regex == NULL)
2523 store.value_regex = NULL;
2524 else if (value_regex == CONFIG_REGEX_NONE)
2525 store.value_regex = CONFIG_REGEX_NONE;
2526 else {
2527 if (value_regex[0] == '!') {
2528 store.do_not_match = 1;
2529 value_regex++;
2530 } else
2531 store.do_not_match = 0;
2532
2533 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2534 if (regcomp(store.value_regex, value_regex,
2535 REG_EXTENDED)) {
2536 error("invalid pattern: %s", value_regex);
2537 free(store.value_regex);
2538 ret = CONFIG_INVALID_PATTERN;
2539 goto out_free;
2540 }
2541 }
2542
2543 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2544 store.offset[0] = 0;
2545 store.state = START;
2546 store.seen = 0;
2547
2548 /*
2549 * After this, store.offset will contain the *end* offset
2550 * of the last match, or remain at 0 if no match was found.
2551 * As a side effect, we make sure to transform only a valid
2552 * existing config file.
2553 */
2554 if (git_config_from_file(store_aux, config_filename, NULL)) {
2555 error("invalid config file %s", config_filename);
2556 free(store.key);
2557 if (store.value_regex != NULL &&
2558 store.value_regex != CONFIG_REGEX_NONE) {
2559 regfree(store.value_regex);
2560 free(store.value_regex);
2561 }
2562 ret = CONFIG_INVALID_FILE;
2563 goto out_free;
2564 }
2565
2566 free(store.key);
2567 if (store.value_regex != NULL &&
2568 store.value_regex != CONFIG_REGEX_NONE) {
2569 regfree(store.value_regex);
2570 free(store.value_regex);
2571 }
2572
2573 /* if nothing to unset, or too many matches, error out */
2574 if ((store.seen == 0 && value == NULL) ||
2575 (store.seen > 1 && multi_replace == 0)) {
2576 ret = CONFIG_NOTHING_SET;
2577 goto out_free;
2578 }
2579
2580 if (fstat(in_fd, &st) == -1) {
2581 error_errno(_("fstat on %s failed"), config_filename);
2582 ret = CONFIG_INVALID_FILE;
2583 goto out_free;
2584 }
2585
2586 contents_sz = xsize_t(st.st_size);
2587 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2588 MAP_PRIVATE, in_fd, 0);
2589 if (contents == MAP_FAILED) {
2590 if (errno == ENODEV && S_ISDIR(st.st_mode))
2591 errno = EISDIR;
2592 error_errno("unable to mmap '%s'", config_filename);
2593 ret = CONFIG_INVALID_FILE;
2594 contents = NULL;
2595 goto out_free;
2596 }
2597 close(in_fd);
2598 in_fd = -1;
2599
2600 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2601 error_errno("chmod on %s failed", get_lock_file_path(lock));
2602 ret = CONFIG_NO_WRITE;
2603 goto out_free;
2604 }
2605
2606 if (store.seen == 0)
2607 store.seen = 1;
2608
2609 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2610 if (store.offset[i] == 0) {
2611 store.offset[i] = copy_end = contents_sz;
2612 } else if (store.state != KEY_SEEN) {
2613 copy_end = store.offset[i];
2614 } else
2615 copy_end = find_beginning_of_line(
2616 contents, contents_sz,
2617 store.offset[i]-2, &new_line);
2618
2619 if (copy_end > 0 && contents[copy_end-1] != '\n')
2620 new_line = 1;
2621
2622 /* write the first part of the config */
2623 if (copy_end > copy_begin) {
2624 if (write_in_full(fd, contents + copy_begin,
2625 copy_end - copy_begin) <
2626 copy_end - copy_begin)
2627 goto write_err_out;
2628 if (new_line &&
2629 write_str_in_full(fd, "\n") != 1)
2630 goto write_err_out;
2631 }
2632 copy_begin = store.offset[i];
2633 }
2634
2635 /* write the pair (value == NULL means unset) */
2636 if (value != NULL) {
2637 if (store.state == START) {
2638 if (!store_write_section(fd, key))
2639 goto write_err_out;
2640 }
2641 if (!store_write_pair(fd, key, value))
2642 goto write_err_out;
2643 }
2644
2645 /* write the rest of the config */
2646 if (copy_begin < contents_sz)
2647 if (write_in_full(fd, contents + copy_begin,
2648 contents_sz - copy_begin) <
2649 contents_sz - copy_begin)
2650 goto write_err_out;
2651
2652 munmap(contents, contents_sz);
2653 contents = NULL;
2654 }
2655
2656 if (commit_lock_file(lock) < 0) {
2657 error_errno("could not write config file %s", config_filename);
2658 ret = CONFIG_NO_WRITE;
2659 lock = NULL;
2660 goto out_free;
2661 }
2662
2663 /*
2664 * lock is committed, so don't try to roll it back below.
2665 * NOTE: Since lockfile.c keeps a linked list of all created
2666 * lock_file structures, it isn't safe to free(lock). It's
2667 * better to just leave it hanging around.
2668 */
2669 lock = NULL;
2670 ret = 0;
2671
2672 /* Invalidate the config cache */
2673 git_config_clear();
2674
2675 out_free:
2676 if (lock)
2677 rollback_lock_file(lock);
2678 free(filename_buf);
2679 if (contents)
2680 munmap(contents, contents_sz);
2681 if (in_fd >= 0)
2682 close(in_fd);
2683 return ret;
2684
2685 write_err_out:
2686 ret = write_error(get_lock_file_path(lock));
2687 goto out_free;
2688
2689 }
2690
2691 void git_config_set_multivar_in_file(const char *config_filename,
2692 const char *key, const char *value,
2693 const char *value_regex, int multi_replace)
2694 {
2695 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2696 value_regex, multi_replace))
2697 return;
2698 if (value)
2699 die(_("could not set '%s' to '%s'"), key, value);
2700 else
2701 die(_("could not unset '%s'"), key);
2702 }
2703
2704 int git_config_set_multivar_gently(const char *key, const char *value,
2705 const char *value_regex, int multi_replace)
2706 {
2707 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2708 multi_replace);
2709 }
2710
2711 void git_config_set_multivar(const char *key, const char *value,
2712 const char *value_regex, int multi_replace)
2713 {
2714 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2715 multi_replace);
2716 }
2717
2718 static int section_name_match (const char *buf, const char *name)
2719 {
2720 int i = 0, j = 0, dot = 0;
2721 if (buf[i] != '[')
2722 return 0;
2723 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2724 if (!dot && isspace(buf[i])) {
2725 dot = 1;
2726 if (name[j++] != '.')
2727 break;
2728 for (i++; isspace(buf[i]); i++)
2729 ; /* do nothing */
2730 if (buf[i] != '"')
2731 break;
2732 continue;
2733 }
2734 if (buf[i] == '\\' && dot)
2735 i++;
2736 else if (buf[i] == '"' && dot) {
2737 for (i++; isspace(buf[i]); i++)
2738 ; /* do_nothing */
2739 break;
2740 }
2741 if (buf[i] != name[j++])
2742 break;
2743 }
2744 if (buf[i] == ']' && name[j] == 0) {
2745 /*
2746 * We match, now just find the right length offset by
2747 * gobbling up any whitespace after it, as well
2748 */
2749 i++;
2750 for (; buf[i] && isspace(buf[i]); i++)
2751 ; /* do nothing */
2752 return i;
2753 }
2754 return 0;
2755 }
2756
2757 static int section_name_is_ok(const char *name)
2758 {
2759 /* Empty section names are bogus. */
2760 if (!*name)
2761 return 0;
2762
2763 /*
2764 * Before a dot, we must be alphanumeric or dash. After the first dot,
2765 * anything goes, so we can stop checking.
2766 */
2767 for (; *name && *name != '.'; name++)
2768 if (*name != '-' && !isalnum(*name))
2769 return 0;
2770 return 1;
2771 }
2772
2773 /* if new_name == NULL, the section is removed instead */
2774 int git_config_rename_section_in_file(const char *config_filename,
2775 const char *old_name, const char *new_name)
2776 {
2777 int ret = 0, remove = 0;
2778 char *filename_buf = NULL;
2779 struct lock_file *lock;
2780 int out_fd;
2781 char buf[1024];
2782 FILE *config_file = NULL;
2783 struct stat st;
2784
2785 if (new_name && !section_name_is_ok(new_name)) {
2786 ret = error("invalid section name: %s", new_name);
2787 goto out_no_rollback;
2788 }
2789
2790 if (!config_filename)
2791 config_filename = filename_buf = git_pathdup("config");
2792
2793 lock = xcalloc(1, sizeof(struct lock_file));
2794 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2795 if (out_fd < 0) {
2796 ret = error("could not lock config file %s", config_filename);
2797 goto out;
2798 }
2799
2800 if (!(config_file = fopen(config_filename, "rb"))) {
2801 ret = warn_on_fopen_errors(config_filename);
2802 if (ret)
2803 goto out;
2804 /* no config file means nothing to rename, no error */
2805 goto commit_and_out;
2806 }
2807
2808 if (fstat(fileno(config_file), &st) == -1) {
2809 ret = error_errno(_("fstat on %s failed"), config_filename);
2810 goto out;
2811 }
2812
2813 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2814 ret = error_errno("chmod on %s failed",
2815 get_lock_file_path(lock));
2816 goto out;
2817 }
2818
2819 while (fgets(buf, sizeof(buf), config_file)) {
2820 int i;
2821 int length;
2822 char *output = buf;
2823 for (i = 0; buf[i] && isspace(buf[i]); i++)
2824 ; /* do nothing */
2825 if (buf[i] == '[') {
2826 /* it's a section */
2827 int offset = section_name_match(&buf[i], old_name);
2828 if (offset > 0) {
2829 ret++;
2830 if (new_name == NULL) {
2831 remove = 1;
2832 continue;
2833 }
2834 store.baselen = strlen(new_name);
2835 if (!store_write_section(out_fd, new_name)) {
2836 ret = write_error(get_lock_file_path(lock));
2837 goto out;
2838 }
2839 /*
2840 * We wrote out the new section, with
2841 * a newline, now skip the old
2842 * section's length
2843 */
2844 output += offset + i;
2845 if (strlen(output) > 0) {
2846 /*
2847 * More content means there's
2848 * a declaration to put on the
2849 * next line; indent with a
2850 * tab
2851 */
2852 output -= 1;
2853 output[0] = '\t';
2854 }
2855 }
2856 remove = 0;
2857 }
2858 if (remove)
2859 continue;
2860 length = strlen(output);
2861 if (write_in_full(out_fd, output, length) != length) {
2862 ret = write_error(get_lock_file_path(lock));
2863 goto out;
2864 }
2865 }
2866 fclose(config_file);
2867 config_file = NULL;
2868 commit_and_out:
2869 if (commit_lock_file(lock) < 0)
2870 ret = error_errno("could not write config file %s",
2871 config_filename);
2872 out:
2873 if (config_file)
2874 fclose(config_file);
2875 rollback_lock_file(lock);
2876 out_no_rollback:
2877 free(filename_buf);
2878 return ret;
2879 }
2880
2881 int git_config_rename_section(const char *old_name, const char *new_name)
2882 {
2883 return git_config_rename_section_in_file(NULL, old_name, new_name);
2884 }
2885
2886 /*
2887 * Call this to report error for your variable that should not
2888 * get a boolean value (i.e. "[my] var" means "true").
2889 */
2890 #undef config_error_nonbool
2891 int config_error_nonbool(const char *var)
2892 {
2893 return error("missing value for '%s'", var);
2894 }
2895
2896 int parse_config_key(const char *var,
2897 const char *section,
2898 const char **subsection, int *subsection_len,
2899 const char **key)
2900 {
2901 const char *dot;
2902
2903 /* Does it start with "section." ? */
2904 if (!skip_prefix(var, section, &var) || *var != '.')
2905 return -1;
2906
2907 /*
2908 * Find the key; we don't know yet if we have a subsection, but we must
2909 * parse backwards from the end, since the subsection may have dots in
2910 * it, too.
2911 */
2912 dot = strrchr(var, '.');
2913 *key = dot + 1;
2914
2915 /* Did we have a subsection at all? */
2916 if (dot == var) {
2917 if (subsection) {
2918 *subsection = NULL;
2919 *subsection_len = 0;
2920 }
2921 }
2922 else {
2923 if (!subsection)
2924 return -1;
2925 *subsection = var + 1;
2926 *subsection_len = dot - *subsection;
2927 }
2928
2929 return 0;
2930 }
2931
2932 const char *current_config_origin_type(void)
2933 {
2934 int type;
2935 if (current_config_kvi)
2936 type = current_config_kvi->origin_type;
2937 else if(cf)
2938 type = cf->origin_type;
2939 else
2940 die("BUG: current_config_origin_type called outside config callback");
2941
2942 switch (type) {
2943 case CONFIG_ORIGIN_BLOB:
2944 return "blob";
2945 case CONFIG_ORIGIN_FILE:
2946 return "file";
2947 case CONFIG_ORIGIN_STDIN:
2948 return "standard input";
2949 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2950 return "submodule-blob";
2951 case CONFIG_ORIGIN_CMDLINE:
2952 return "command line";
2953 default:
2954 die("BUG: unknown config origin type");
2955 }
2956 }
2957
2958 const char *current_config_name(void)
2959 {
2960 const char *name;
2961 if (current_config_kvi)
2962 name = current_config_kvi->filename;
2963 else if (cf)
2964 name = cf->name;
2965 else
2966 die("BUG: current_config_name called outside config callback");
2967 return name ? name : "";
2968 }
2969
2970 enum config_scope current_config_scope(void)
2971 {
2972 if (current_config_kvi)
2973 return current_config_kvi->scope;
2974 else
2975 return current_parsing_scope;
2976 }