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Merge branch 'jk/grep-no-index-fix'
[git/git-svn.git] / config.c
blobc6b874a7bf763851b425d526f704966aaad129b2
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 "lockfile.h"
10 #include "exec_cmd.h"
11 #include "strbuf.h"
12 #include "quote.h"
13 #include "hashmap.h"
14 #include "string-list.h"
15 #include "utf8.h"
16
17 struct config_source {
18 struct config_source *prev;
19 union {
20 FILE *file;
21 struct config_buf {
22 const char *buf;
23 size_t len;
24 size_t pos;
25 } buf;
26 } u;
27 enum config_origin_type origin_type;
28 const char *name;
29 const char *path;
30 int die_on_error;
31 int linenr;
32 int eof;
33 struct strbuf value;
34 struct strbuf var;
35
36 int (*do_fgetc)(struct config_source *c);
37 int (*do_ungetc)(int c, struct config_source *conf);
38 long (*do_ftell)(struct config_source *c);
39 };
40
41 /*
42 * These variables record the "current" config source, which
43 * can be accessed by parsing callbacks.
44 *
45 * The "cf" variable will be non-NULL only when we are actually parsing a real
46 * config source (file, blob, cmdline, etc).
47 *
48 * The "current_config_kvi" variable will be non-NULL only when we are feeding
49 * cached config from a configset into a callback.
50 *
51 * They should generally never be non-NULL at the same time. If they are both
52 * NULL, then we aren't parsing anything (and depending on the function looking
53 * at the variables, it's either a bug for it to be called in the first place,
54 * or it's a function which can be reused for non-config purposes, and should
55 * fall back to some sane behavior).
56 */
57 static struct config_source *cf;
58 static struct key_value_info *current_config_kvi;
59
60 /*
61 * Similar to the variables above, this gives access to the "scope" of the
62 * current value (repo, global, etc). For cached values, it can be found via
63 * the current_config_kvi as above. During parsing, the current value can be
64 * found in this variable. It's not part of "cf" because it transcends a single
65 * file (i.e., a file included from .git/config is still in "repo" scope).
66 */
67 static enum config_scope current_parsing_scope;
68
69 static int core_compression_seen;
70 static int pack_compression_seen;
71 static int zlib_compression_seen;
72
73 /*
74 * Default config_set that contains key-value pairs from the usual set of config
75 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
76 * config file and the global /etc/gitconfig)
77 */
78 static struct config_set the_config_set;
79
80 static int config_file_fgetc(struct config_source *conf)
81 {
82 return getc_unlocked(conf->u.file);
83 }
84
85 static int config_file_ungetc(int c, struct config_source *conf)
86 {
87 return ungetc(c, conf->u.file);
88 }
89
90 static long config_file_ftell(struct config_source *conf)
91 {
92 return ftell(conf->u.file);
93 }
94
95
96 static int config_buf_fgetc(struct config_source *conf)
97 {
98 if (conf->u.buf.pos < conf->u.buf.len)
99 return conf->u.buf.buf[conf->u.buf.pos++];
100
101 return EOF;
102 }
103
104 static int config_buf_ungetc(int c, struct config_source *conf)
105 {
106 if (conf->u.buf.pos > 0) {
107 conf->u.buf.pos--;
108 if (conf->u.buf.buf[conf->u.buf.pos] != c)
109 die("BUG: config_buf can only ungetc the same character");
110 return c;
111 }
112
113 return EOF;
114 }
115
116 static long config_buf_ftell(struct config_source *conf)
117 {
118 return conf->u.buf.pos;
119 }
120
121 #define MAX_INCLUDE_DEPTH 10
122 static const char include_depth_advice[] =
123 "exceeded maximum include depth (%d) while including\n"
124 " %s\n"
125 "from\n"
126 " %s\n"
127 "Do you have circular includes?";
128 static int handle_path_include(const char *path, struct config_include_data *inc)
129 {
130 int ret = 0;
131 struct strbuf buf = STRBUF_INIT;
132 char *expanded;
133
134 if (!path)
135 return config_error_nonbool("include.path");
136
137 expanded = expand_user_path(path);
138 if (!expanded)
139 return error("could not expand include path '%s'", path);
140 path = expanded;
141
142 /*
143 * Use an absolute path as-is, but interpret relative paths
144 * based on the including config file.
145 */
146 if (!is_absolute_path(path)) {
147 char *slash;
148
149 if (!cf || !cf->path)
150 return error("relative config includes must come from files");
151
152 slash = find_last_dir_sep(cf->path);
153 if (slash)
154 strbuf_add(&buf, cf->path, slash - cf->path + 1);
155 strbuf_addstr(&buf, path);
156 path = buf.buf;
157 }
158
159 if (!access_or_die(path, R_OK, 0)) {
160 if (++inc->depth > MAX_INCLUDE_DEPTH)
161 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
162 !cf ? "<unknown>" :
163 cf->name ? cf->name :
164 "the command line");
165 ret = git_config_from_file(git_config_include, path, inc);
166 inc->depth--;
167 }
168 strbuf_release(&buf);
169 free(expanded);
170 return ret;
171 }
172
173 int git_config_include(const char *var, const char *value, void *data)
174 {
175 struct config_include_data *inc = data;
176 int ret;
177
178 /*
179 * Pass along all values, including "include" directives; this makes it
180 * possible to query information on the includes themselves.
181 */
182 ret = inc->fn(var, value, inc->data);
183 if (ret < 0)
184 return ret;
185
186 if (!strcmp(var, "include.path"))
187 ret = handle_path_include(value, inc);
188 return ret;
189 }
190
191 void git_config_push_parameter(const char *text)
192 {
193 struct strbuf env = STRBUF_INIT;
194 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
195 if (old && *old) {
196 strbuf_addstr(&env, old);
197 strbuf_addch(&env, ' ');
198 }
199 sq_quote_buf(&env, text);
200 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
201 strbuf_release(&env);
202 }
203
204 int git_config_parse_parameter(const char *text,
205 config_fn_t fn, void *data)
206 {
207 const char *value;
208 struct strbuf **pair;
209
210 pair = strbuf_split_str(text, '=', 2);
211 if (!pair[0])
212 return error("bogus config parameter: %s", text);
213
214 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
215 strbuf_setlen(pair[0], pair[0]->len - 1);
216 value = pair[1] ? pair[1]->buf : "";
217 } else {
218 value = NULL;
219 }
220
221 strbuf_trim(pair[0]);
222 if (!pair[0]->len) {
223 strbuf_list_free(pair);
224 return error("bogus config parameter: %s", text);
225 }
226 strbuf_tolower(pair[0]);
227 if (fn(pair[0]->buf, value, data) < 0) {
228 strbuf_list_free(pair);
229 return -1;
230 }
231 strbuf_list_free(pair);
232 return 0;
233 }
234
235 int git_config_from_parameters(config_fn_t fn, void *data)
236 {
237 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
238 int ret = 0;
239 char *envw;
240 const char **argv = NULL;
241 int nr = 0, alloc = 0;
242 int i;
243 struct config_source source;
244
245 if (!env)
246 return 0;
247
248 memset(&source, 0, sizeof(source));
249 source.prev = cf;
250 source.origin_type = CONFIG_ORIGIN_CMDLINE;
251 cf = &source;
252
253 /* sq_dequote will write over it */
254 envw = xstrdup(env);
255
256 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
257 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
258 goto out;
259 }
260
261 for (i = 0; i < nr; i++) {
262 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
263 ret = -1;
264 goto out;
265 }
266 }
267
268 out:
269 free(argv);
270 free(envw);
271 cf = source.prev;
272 return ret;
273 }
274
275 static int get_next_char(void)
276 {
277 int c = cf->do_fgetc(cf);
278
279 if (c == '\r') {
280 /* DOS like systems */
281 c = cf->do_fgetc(cf);
282 if (c != '\n') {
283 if (c != EOF)
284 cf->do_ungetc(c, cf);
285 c = '\r';
286 }
287 }
288 if (c == '\n')
289 cf->linenr++;
290 if (c == EOF) {
291 cf->eof = 1;
292 cf->linenr++;
293 c = '\n';
294 }
295 return c;
296 }
297
298 static char *parse_value(void)
299 {
300 int quote = 0, comment = 0, space = 0;
301
302 strbuf_reset(&cf->value);
303 for (;;) {
304 int c = get_next_char();
305 if (c == '\n') {
306 if (quote) {
307 cf->linenr--;
308 return NULL;
309 }
310 return cf->value.buf;
311 }
312 if (comment)
313 continue;
314 if (isspace(c) && !quote) {
315 if (cf->value.len)
316 space++;
317 continue;
318 }
319 if (!quote) {
320 if (c == ';' || c == '#') {
321 comment = 1;
322 continue;
323 }
324 }
325 for (; space; space--)
326 strbuf_addch(&cf->value, ' ');
327 if (c == '\\') {
328 c = get_next_char();
329 switch (c) {
330 case '\n':
331 continue;
332 case 't':
333 c = '\t';
334 break;
335 case 'b':
336 c = '\b';
337 break;
338 case 'n':
339 c = '\n';
340 break;
341 /* Some characters escape as themselves */
342 case '\\': case '"':
343 break;
344 /* Reject unknown escape sequences */
345 default:
346 return NULL;
347 }
348 strbuf_addch(&cf->value, c);
349 continue;
350 }
351 if (c == '"') {
352 quote = 1-quote;
353 continue;
354 }
355 strbuf_addch(&cf->value, c);
356 }
357 }
358
359 static inline int iskeychar(int c)
360 {
361 return isalnum(c) || c == '-';
362 }
363
364 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
365 {
366 int c;
367 char *value;
368 int ret;
369
370 /* Get the full name */
371 for (;;) {
372 c = get_next_char();
373 if (cf->eof)
374 break;
375 if (!iskeychar(c))
376 break;
377 strbuf_addch(name, tolower(c));
378 }
379
380 while (c == ' ' || c == '\t')
381 c = get_next_char();
382
383 value = NULL;
384 if (c != '\n') {
385 if (c != '=')
386 return -1;
387 value = parse_value();
388 if (!value)
389 return -1;
390 }
391 /*
392 * We already consumed the \n, but we need linenr to point to
393 * the line we just parsed during the call to fn to get
394 * accurate line number in error messages.
395 */
396 cf->linenr--;
397 ret = fn(name->buf, value, data);
398 cf->linenr++;
399 return ret;
400 }
401
402 static int get_extended_base_var(struct strbuf *name, int c)
403 {
404 do {
405 if (c == '\n')
406 goto error_incomplete_line;
407 c = get_next_char();
408 } while (isspace(c));
409
410 /* We require the format to be '[base "extension"]' */
411 if (c != '"')
412 return -1;
413 strbuf_addch(name, '.');
414
415 for (;;) {
416 int c = get_next_char();
417 if (c == '\n')
418 goto error_incomplete_line;
419 if (c == '"')
420 break;
421 if (c == '\\') {
422 c = get_next_char();
423 if (c == '\n')
424 goto error_incomplete_line;
425 }
426 strbuf_addch(name, c);
427 }
428
429 /* Final ']' */
430 if (get_next_char() != ']')
431 return -1;
432 return 0;
433 error_incomplete_line:
434 cf->linenr--;
435 return -1;
436 }
437
438 static int get_base_var(struct strbuf *name)
439 {
440 for (;;) {
441 int c = get_next_char();
442 if (cf->eof)
443 return -1;
444 if (c == ']')
445 return 0;
446 if (isspace(c))
447 return get_extended_base_var(name, c);
448 if (!iskeychar(c) && c != '.')
449 return -1;
450 strbuf_addch(name, tolower(c));
451 }
452 }
453
454 static int git_parse_source(config_fn_t fn, void *data)
455 {
456 int comment = 0;
457 int baselen = 0;
458 struct strbuf *var = &cf->var;
459 int error_return = 0;
460 char *error_msg = NULL;
461
462 /* U+FEFF Byte Order Mark in UTF8 */
463 const char *bomptr = utf8_bom;
464
465 for (;;) {
466 int c = get_next_char();
467 if (bomptr && *bomptr) {
468 /* We are at the file beginning; skip UTF8-encoded BOM
469 * if present. Sane editors won't put this in on their
470 * own, but e.g. Windows Notepad will do it happily. */
471 if (c == (*bomptr & 0377)) {
472 bomptr++;
473 continue;
474 } else {
475 /* Do not tolerate partial BOM. */
476 if (bomptr != utf8_bom)
477 break;
478 /* No BOM at file beginning. Cool. */
479 bomptr = NULL;
480 }
481 }
482 if (c == '\n') {
483 if (cf->eof)
484 return 0;
485 comment = 0;
486 continue;
487 }
488 if (comment || isspace(c))
489 continue;
490 if (c == '#' || c == ';') {
491 comment = 1;
492 continue;
493 }
494 if (c == '[') {
495 /* Reset prior to determining a new stem */
496 strbuf_reset(var);
497 if (get_base_var(var) < 0 || var->len < 1)
498 break;
499 strbuf_addch(var, '.');
500 baselen = var->len;
501 continue;
502 }
503 if (!isalpha(c))
504 break;
505 /*
506 * Truncate the var name back to the section header
507 * stem prior to grabbing the suffix part of the name
508 * and the value.
509 */
510 strbuf_setlen(var, baselen);
511 strbuf_addch(var, tolower(c));
512 if (get_value(fn, data, var) < 0)
513 break;
514 }
515
516 switch (cf->origin_type) {
517 case CONFIG_ORIGIN_BLOB:
518 error_msg = xstrfmt(_("bad config line %d in blob %s"),
519 cf->linenr, cf->name);
520 break;
521 case CONFIG_ORIGIN_FILE:
522 error_msg = xstrfmt(_("bad config line %d in file %s"),
523 cf->linenr, cf->name);
524 break;
525 case CONFIG_ORIGIN_STDIN:
526 error_msg = xstrfmt(_("bad config line %d in standard input"),
527 cf->linenr);
528 break;
529 case CONFIG_ORIGIN_SUBMODULE_BLOB:
530 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
531 cf->linenr, cf->name);
532 break;
533 case CONFIG_ORIGIN_CMDLINE:
534 error_msg = xstrfmt(_("bad config line %d in command line %s"),
535 cf->linenr, cf->name);
536 break;
537 default:
538 error_msg = xstrfmt(_("bad config line %d in %s"),
539 cf->linenr, cf->name);
540 }
541
542 if (cf->die_on_error)
543 die("%s", error_msg);
544 else
545 error_return = error("%s", error_msg);
546
547 free(error_msg);
548 return error_return;
549 }
550
551 static int parse_unit_factor(const char *end, uintmax_t *val)
552 {
553 if (!*end)
554 return 1;
555 else if (!strcasecmp(end, "k")) {
556 *val *= 1024;
557 return 1;
558 }
559 else if (!strcasecmp(end, "m")) {
560 *val *= 1024 * 1024;
561 return 1;
562 }
563 else if (!strcasecmp(end, "g")) {
564 *val *= 1024 * 1024 * 1024;
565 return 1;
566 }
567 return 0;
568 }
569
570 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
571 {
572 if (value && *value) {
573 char *end;
574 intmax_t val;
575 uintmax_t uval;
576 uintmax_t factor = 1;
577
578 errno = 0;
579 val = strtoimax(value, &end, 0);
580 if (errno == ERANGE)
581 return 0;
582 if (!parse_unit_factor(end, &factor)) {
583 errno = EINVAL;
584 return 0;
585 }
586 uval = labs(val);
587 uval *= factor;
588 if (uval > max || labs(val) > uval) {
589 errno = ERANGE;
590 return 0;
591 }
592 val *= factor;
593 *ret = val;
594 return 1;
595 }
596 errno = EINVAL;
597 return 0;
598 }
599
600 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
601 {
602 if (value && *value) {
603 char *end;
604 uintmax_t val;
605 uintmax_t oldval;
606
607 errno = 0;
608 val = strtoumax(value, &end, 0);
609 if (errno == ERANGE)
610 return 0;
611 oldval = val;
612 if (!parse_unit_factor(end, &val)) {
613 errno = EINVAL;
614 return 0;
615 }
616 if (val > max || oldval > val) {
617 errno = ERANGE;
618 return 0;
619 }
620 *ret = val;
621 return 1;
622 }
623 errno = EINVAL;
624 return 0;
625 }
626
627 static int git_parse_int(const char *value, int *ret)
628 {
629 intmax_t tmp;
630 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
631 return 0;
632 *ret = tmp;
633 return 1;
634 }
635
636 static int git_parse_int64(const char *value, int64_t *ret)
637 {
638 intmax_t tmp;
639 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
640 return 0;
641 *ret = tmp;
642 return 1;
643 }
644
645 int git_parse_ulong(const char *value, unsigned long *ret)
646 {
647 uintmax_t tmp;
648 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
649 return 0;
650 *ret = tmp;
651 return 1;
652 }
653
654 NORETURN
655 static void die_bad_number(const char *name, const char *value)
656 {
657 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
658
659 if (!value)
660 value = "";
661
662 if (!(cf && cf->name))
663 die(_("bad numeric config value '%s' for '%s': %s"),
664 value, name, error_type);
665
666 switch (cf->origin_type) {
667 case CONFIG_ORIGIN_BLOB:
668 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
669 value, name, cf->name, error_type);
670 case CONFIG_ORIGIN_FILE:
671 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
672 value, name, cf->name, error_type);
673 case CONFIG_ORIGIN_STDIN:
674 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
675 value, name, error_type);
676 case CONFIG_ORIGIN_SUBMODULE_BLOB:
677 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
678 value, name, cf->name, error_type);
679 case CONFIG_ORIGIN_CMDLINE:
680 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
681 value, name, cf->name, error_type);
682 default:
683 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
684 value, name, cf->name, error_type);
685 }
686 }
687
688 int git_config_int(const char *name, const char *value)
689 {
690 int ret;
691 if (!git_parse_int(value, &ret))
692 die_bad_number(name, value);
693 return ret;
694 }
695
696 int64_t git_config_int64(const char *name, const char *value)
697 {
698 int64_t ret;
699 if (!git_parse_int64(value, &ret))
700 die_bad_number(name, value);
701 return ret;
702 }
703
704 unsigned long git_config_ulong(const char *name, const char *value)
705 {
706 unsigned long ret;
707 if (!git_parse_ulong(value, &ret))
708 die_bad_number(name, value);
709 return ret;
710 }
711
712 int git_parse_maybe_bool(const char *value)
713 {
714 if (!value)
715 return 1;
716 if (!*value)
717 return 0;
718 if (!strcasecmp(value, "true")
719 || !strcasecmp(value, "yes")
720 || !strcasecmp(value, "on"))
721 return 1;
722 if (!strcasecmp(value, "false")
723 || !strcasecmp(value, "no")
724 || !strcasecmp(value, "off"))
725 return 0;
726 return -1;
727 }
728
729 int git_config_maybe_bool(const char *name, const char *value)
730 {
731 int v = git_parse_maybe_bool(value);
732 if (0 <= v)
733 return v;
734 if (git_parse_int(value, &v))
735 return !!v;
736 return -1;
737 }
738
739 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
740 {
741 int v = git_parse_maybe_bool(value);
742 if (0 <= v) {
743 *is_bool = 1;
744 return v;
745 }
746 *is_bool = 0;
747 return git_config_int(name, value);
748 }
749
750 int git_config_bool(const char *name, const char *value)
751 {
752 int discard;
753 return !!git_config_bool_or_int(name, value, &discard);
754 }
755
756 int git_config_string(const char **dest, const char *var, const char *value)
757 {
758 if (!value)
759 return config_error_nonbool(var);
760 *dest = xstrdup(value);
761 return 0;
762 }
763
764 int git_config_pathname(const char **dest, const char *var, const char *value)
765 {
766 if (!value)
767 return config_error_nonbool(var);
768 *dest = expand_user_path(value);
769 if (!*dest)
770 die(_("failed to expand user dir in: '%s'"), value);
771 return 0;
772 }
773
774 static int git_default_core_config(const char *var, const char *value)
775 {
776 /* This needs a better name */
777 if (!strcmp(var, "core.filemode")) {
778 trust_executable_bit = git_config_bool(var, value);
779 return 0;
780 }
781 if (!strcmp(var, "core.trustctime")) {
782 trust_ctime = git_config_bool(var, value);
783 return 0;
784 }
785 if (!strcmp(var, "core.checkstat")) {
786 if (!strcasecmp(value, "default"))
787 check_stat = 1;
788 else if (!strcasecmp(value, "minimal"))
789 check_stat = 0;
790 }
791
792 if (!strcmp(var, "core.quotepath")) {
793 quote_path_fully = git_config_bool(var, value);
794 return 0;
795 }
796
797 if (!strcmp(var, "core.symlinks")) {
798 has_symlinks = git_config_bool(var, value);
799 return 0;
800 }
801
802 if (!strcmp(var, "core.ignorecase")) {
803 ignore_case = git_config_bool(var, value);
804 return 0;
805 }
806
807 if (!strcmp(var, "core.attributesfile"))
808 return git_config_pathname(&git_attributes_file, var, value);
809
810 if (!strcmp(var, "core.hookspath"))
811 return git_config_pathname(&git_hooks_path, var, value);
812
813 if (!strcmp(var, "core.bare")) {
814 is_bare_repository_cfg = git_config_bool(var, value);
815 return 0;
816 }
817
818 if (!strcmp(var, "core.ignorestat")) {
819 assume_unchanged = git_config_bool(var, value);
820 return 0;
821 }
822
823 if (!strcmp(var, "core.prefersymlinkrefs")) {
824 prefer_symlink_refs = git_config_bool(var, value);
825 return 0;
826 }
827
828 if (!strcmp(var, "core.logallrefupdates")) {
829 if (value && !strcasecmp(value, "always"))
830 log_all_ref_updates = LOG_REFS_ALWAYS;
831 else if (git_config_bool(var, value))
832 log_all_ref_updates = LOG_REFS_NORMAL;
833 else
834 log_all_ref_updates = LOG_REFS_NONE;
835 return 0;
836 }
837
838 if (!strcmp(var, "core.warnambiguousrefs")) {
839 warn_ambiguous_refs = git_config_bool(var, value);
840 return 0;
841 }
842
843 if (!strcmp(var, "core.abbrev")) {
844 if (!value)
845 return config_error_nonbool(var);
846 if (!strcasecmp(value, "auto"))
847 default_abbrev = -1;
848 else {
849 int abbrev = git_config_int(var, value);
850 if (abbrev < minimum_abbrev || abbrev > 40)
851 return error("abbrev length out of range: %d", abbrev);
852 default_abbrev = abbrev;
853 }
854 return 0;
855 }
856
857 if (!strcmp(var, "core.disambiguate"))
858 return set_disambiguate_hint_config(var, value);
859
860 if (!strcmp(var, "core.loosecompression")) {
861 int level = git_config_int(var, value);
862 if (level == -1)
863 level = Z_DEFAULT_COMPRESSION;
864 else if (level < 0 || level > Z_BEST_COMPRESSION)
865 die(_("bad zlib compression level %d"), level);
866 zlib_compression_level = level;
867 zlib_compression_seen = 1;
868 return 0;
869 }
870
871 if (!strcmp(var, "core.compression")) {
872 int level = git_config_int(var, value);
873 if (level == -1)
874 level = Z_DEFAULT_COMPRESSION;
875 else if (level < 0 || level > Z_BEST_COMPRESSION)
876 die(_("bad zlib compression level %d"), level);
877 core_compression_level = level;
878 core_compression_seen = 1;
879 if (!zlib_compression_seen)
880 zlib_compression_level = level;
881 if (!pack_compression_seen)
882 pack_compression_level = level;
883 return 0;
884 }
885
886 if (!strcmp(var, "core.packedgitwindowsize")) {
887 int pgsz_x2 = getpagesize() * 2;
888 packed_git_window_size = git_config_ulong(var, value);
889
890 /* This value must be multiple of (pagesize * 2) */
891 packed_git_window_size /= pgsz_x2;
892 if (packed_git_window_size < 1)
893 packed_git_window_size = 1;
894 packed_git_window_size *= pgsz_x2;
895 return 0;
896 }
897
898 if (!strcmp(var, "core.bigfilethreshold")) {
899 big_file_threshold = git_config_ulong(var, value);
900 return 0;
901 }
902
903 if (!strcmp(var, "core.packedgitlimit")) {
904 packed_git_limit = git_config_ulong(var, value);
905 return 0;
906 }
907
908 if (!strcmp(var, "core.deltabasecachelimit")) {
909 delta_base_cache_limit = git_config_ulong(var, value);
910 return 0;
911 }
912
913 if (!strcmp(var, "core.autocrlf")) {
914 if (value && !strcasecmp(value, "input")) {
915 auto_crlf = AUTO_CRLF_INPUT;
916 return 0;
917 }
918 auto_crlf = git_config_bool(var, value);
919 return 0;
920 }
921
922 if (!strcmp(var, "core.safecrlf")) {
923 if (value && !strcasecmp(value, "warn")) {
924 safe_crlf = SAFE_CRLF_WARN;
925 return 0;
926 }
927 safe_crlf = git_config_bool(var, value);
928 return 0;
929 }
930
931 if (!strcmp(var, "core.eol")) {
932 if (value && !strcasecmp(value, "lf"))
933 core_eol = EOL_LF;
934 else if (value && !strcasecmp(value, "crlf"))
935 core_eol = EOL_CRLF;
936 else if (value && !strcasecmp(value, "native"))
937 core_eol = EOL_NATIVE;
938 else
939 core_eol = EOL_UNSET;
940 return 0;
941 }
942
943 if (!strcmp(var, "core.notesref")) {
944 notes_ref_name = xstrdup(value);
945 return 0;
946 }
947
948 if (!strcmp(var, "core.editor"))
949 return git_config_string(&editor_program, var, value);
950
951 if (!strcmp(var, "core.commentchar")) {
952 if (!value)
953 return config_error_nonbool(var);
954 else if (!strcasecmp(value, "auto"))
955 auto_comment_line_char = 1;
956 else if (value[0] && !value[1]) {
957 comment_line_char = value[0];
958 auto_comment_line_char = 0;
959 } else
960 return error("core.commentChar should only be one character");
961 return 0;
962 }
963
964 if (!strcmp(var, "core.askpass"))
965 return git_config_string(&askpass_program, var, value);
966
967 if (!strcmp(var, "core.excludesfile"))
968 return git_config_pathname(&excludes_file, var, value);
969
970 if (!strcmp(var, "core.whitespace")) {
971 if (!value)
972 return config_error_nonbool(var);
973 whitespace_rule_cfg = parse_whitespace_rule(value);
974 return 0;
975 }
976
977 if (!strcmp(var, "core.fsyncobjectfiles")) {
978 fsync_object_files = git_config_bool(var, value);
979 return 0;
980 }
981
982 if (!strcmp(var, "core.preloadindex")) {
983 core_preload_index = git_config_bool(var, value);
984 return 0;
985 }
986
987 if (!strcmp(var, "core.createobject")) {
988 if (!strcmp(value, "rename"))
989 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
990 else if (!strcmp(value, "link"))
991 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
992 else
993 die(_("invalid mode for object creation: %s"), value);
994 return 0;
995 }
996
997 if (!strcmp(var, "core.sparsecheckout")) {
998 core_apply_sparse_checkout = git_config_bool(var, value);
999 return 0;
1000 }
1001
1002 if (!strcmp(var, "core.precomposeunicode")) {
1003 precomposed_unicode = git_config_bool(var, value);
1004 return 0;
1005 }
1006
1007 if (!strcmp(var, "core.protecthfs")) {
1008 protect_hfs = git_config_bool(var, value);
1009 return 0;
1010 }
1011
1012 if (!strcmp(var, "core.protectntfs")) {
1013 protect_ntfs = git_config_bool(var, value);
1014 return 0;
1015 }
1016
1017 if (!strcmp(var, "core.hidedotfiles")) {
1018 if (value && !strcasecmp(value, "dotgitonly"))
1019 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1020 else
1021 hide_dotfiles = git_config_bool(var, value);
1022 return 0;
1023 }
1024
1025 /* Add other config variables here and to Documentation/config.txt. */
1026 return 0;
1027 }
1028
1029 static int git_default_i18n_config(const char *var, const char *value)
1030 {
1031 if (!strcmp(var, "i18n.commitencoding"))
1032 return git_config_string(&git_commit_encoding, var, value);
1033
1034 if (!strcmp(var, "i18n.logoutputencoding"))
1035 return git_config_string(&git_log_output_encoding, var, value);
1036
1037 /* Add other config variables here and to Documentation/config.txt. */
1038 return 0;
1039 }
1040
1041 static int git_default_branch_config(const char *var, const char *value)
1042 {
1043 if (!strcmp(var, "branch.autosetupmerge")) {
1044 if (value && !strcasecmp(value, "always")) {
1045 git_branch_track = BRANCH_TRACK_ALWAYS;
1046 return 0;
1047 }
1048 git_branch_track = git_config_bool(var, value);
1049 return 0;
1050 }
1051 if (!strcmp(var, "branch.autosetuprebase")) {
1052 if (!value)
1053 return config_error_nonbool(var);
1054 else if (!strcmp(value, "never"))
1055 autorebase = AUTOREBASE_NEVER;
1056 else if (!strcmp(value, "local"))
1057 autorebase = AUTOREBASE_LOCAL;
1058 else if (!strcmp(value, "remote"))
1059 autorebase = AUTOREBASE_REMOTE;
1060 else if (!strcmp(value, "always"))
1061 autorebase = AUTOREBASE_ALWAYS;
1062 else
1063 return error("malformed value for %s", var);
1064 return 0;
1065 }
1066
1067 /* Add other config variables here and to Documentation/config.txt. */
1068 return 0;
1069 }
1070
1071 static int git_default_push_config(const char *var, const char *value)
1072 {
1073 if (!strcmp(var, "push.default")) {
1074 if (!value)
1075 return config_error_nonbool(var);
1076 else if (!strcmp(value, "nothing"))
1077 push_default = PUSH_DEFAULT_NOTHING;
1078 else if (!strcmp(value, "matching"))
1079 push_default = PUSH_DEFAULT_MATCHING;
1080 else if (!strcmp(value, "simple"))
1081 push_default = PUSH_DEFAULT_SIMPLE;
1082 else if (!strcmp(value, "upstream"))
1083 push_default = PUSH_DEFAULT_UPSTREAM;
1084 else if (!strcmp(value, "tracking")) /* deprecated */
1085 push_default = PUSH_DEFAULT_UPSTREAM;
1086 else if (!strcmp(value, "current"))
1087 push_default = PUSH_DEFAULT_CURRENT;
1088 else {
1089 error("malformed value for %s: %s", var, value);
1090 return error("Must be one of nothing, matching, simple, "
1091 "upstream or current.");
1092 }
1093 return 0;
1094 }
1095
1096 /* Add other config variables here and to Documentation/config.txt. */
1097 return 0;
1098 }
1099
1100 static int git_default_mailmap_config(const char *var, const char *value)
1101 {
1102 if (!strcmp(var, "mailmap.file"))
1103 return git_config_pathname(&git_mailmap_file, var, value);
1104 if (!strcmp(var, "mailmap.blob"))
1105 return git_config_string(&git_mailmap_blob, var, value);
1106
1107 /* Add other config variables here and to Documentation/config.txt. */
1108 return 0;
1109 }
1110
1111 int git_default_config(const char *var, const char *value, void *dummy)
1112 {
1113 if (starts_with(var, "core."))
1114 return git_default_core_config(var, value);
1115
1116 if (starts_with(var, "user."))
1117 return git_ident_config(var, value, dummy);
1118
1119 if (starts_with(var, "i18n."))
1120 return git_default_i18n_config(var, value);
1121
1122 if (starts_with(var, "branch."))
1123 return git_default_branch_config(var, value);
1124
1125 if (starts_with(var, "push."))
1126 return git_default_push_config(var, value);
1127
1128 if (starts_with(var, "mailmap."))
1129 return git_default_mailmap_config(var, value);
1130
1131 if (starts_with(var, "advice."))
1132 return git_default_advice_config(var, value);
1133
1134 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1135 pager_use_color = git_config_bool(var,value);
1136 return 0;
1137 }
1138
1139 if (!strcmp(var, "pack.packsizelimit")) {
1140 pack_size_limit_cfg = git_config_ulong(var, value);
1141 return 0;
1142 }
1143
1144 if (!strcmp(var, "pack.compression")) {
1145 int level = git_config_int(var, value);
1146 if (level == -1)
1147 level = Z_DEFAULT_COMPRESSION;
1148 else if (level < 0 || level > Z_BEST_COMPRESSION)
1149 die(_("bad pack compression level %d"), level);
1150 pack_compression_level = level;
1151 pack_compression_seen = 1;
1152 return 0;
1153 }
1154
1155 /* Add other config variables here and to Documentation/config.txt. */
1156 return 0;
1157 }
1158
1159 /*
1160 * All source specific fields in the union, die_on_error, name and the callbacks
1161 * fgetc, ungetc, ftell of top need to be initialized before calling
1162 * this function.
1163 */
1164 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1165 {
1166 int ret;
1167
1168 /* push config-file parsing state stack */
1169 top->prev = cf;
1170 top->linenr = 1;
1171 top->eof = 0;
1172 strbuf_init(&top->value, 1024);
1173 strbuf_init(&top->var, 1024);
1174 cf = top;
1175
1176 ret = git_parse_source(fn, data);
1177
1178 /* pop config-file parsing state stack */
1179 strbuf_release(&top->value);
1180 strbuf_release(&top->var);
1181 cf = top->prev;
1182
1183 return ret;
1184 }
1185
1186 static int do_config_from_file(config_fn_t fn,
1187 const enum config_origin_type origin_type,
1188 const char *name, const char *path, FILE *f,
1189 void *data)
1190 {
1191 struct config_source top;
1192
1193 top.u.file = f;
1194 top.origin_type = origin_type;
1195 top.name = name;
1196 top.path = path;
1197 top.die_on_error = 1;
1198 top.do_fgetc = config_file_fgetc;
1199 top.do_ungetc = config_file_ungetc;
1200 top.do_ftell = config_file_ftell;
1201
1202 return do_config_from(&top, fn, data);
1203 }
1204
1205 static int git_config_from_stdin(config_fn_t fn, void *data)
1206 {
1207 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1208 }
1209
1210 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1211 {
1212 int ret = -1;
1213 FILE *f;
1214
1215 f = fopen(filename, "r");
1216 if (f) {
1217 flockfile(f);
1218 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1219 funlockfile(f);
1220 fclose(f);
1221 }
1222 return ret;
1223 }
1224
1225 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1226 const char *name, const char *buf, size_t len, void *data)
1227 {
1228 struct config_source top;
1229
1230 top.u.buf.buf = buf;
1231 top.u.buf.len = len;
1232 top.u.buf.pos = 0;
1233 top.origin_type = origin_type;
1234 top.name = name;
1235 top.path = NULL;
1236 top.die_on_error = 0;
1237 top.do_fgetc = config_buf_fgetc;
1238 top.do_ungetc = config_buf_ungetc;
1239 top.do_ftell = config_buf_ftell;
1240
1241 return do_config_from(&top, fn, data);
1242 }
1243
1244 int git_config_from_blob_sha1(config_fn_t fn,
1245 const char *name,
1246 const unsigned char *sha1,
1247 void *data)
1248 {
1249 enum object_type type;
1250 char *buf;
1251 unsigned long size;
1252 int ret;
1253
1254 buf = read_sha1_file(sha1, &type, &size);
1255 if (!buf)
1256 return error("unable to load config blob object '%s'", name);
1257 if (type != OBJ_BLOB) {
1258 free(buf);
1259 return error("reference '%s' does not point to a blob", name);
1260 }
1261
1262 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1263 free(buf);
1264
1265 return ret;
1266 }
1267
1268 static int git_config_from_blob_ref(config_fn_t fn,
1269 const char *name,
1270 void *data)
1271 {
1272 unsigned char sha1[20];
1273
1274 if (get_sha1(name, sha1) < 0)
1275 return error("unable to resolve config blob '%s'", name);
1276 return git_config_from_blob_sha1(fn, name, sha1, data);
1277 }
1278
1279 const char *git_etc_gitconfig(void)
1280 {
1281 static const char *system_wide;
1282 if (!system_wide)
1283 system_wide = system_path(ETC_GITCONFIG);
1284 return system_wide;
1285 }
1286
1287 /*
1288 * Parse environment variable 'k' as a boolean (in various
1289 * possible spellings); if missing, use the default value 'def'.
1290 */
1291 int git_env_bool(const char *k, int def)
1292 {
1293 const char *v = getenv(k);
1294 return v ? git_config_bool(k, v) : def;
1295 }
1296
1297 /*
1298 * Parse environment variable 'k' as ulong with possibly a unit
1299 * suffix; if missing, use the default value 'val'.
1300 */
1301 unsigned long git_env_ulong(const char *k, unsigned long val)
1302 {
1303 const char *v = getenv(k);
1304 if (v && !git_parse_ulong(v, &val))
1305 die("failed to parse %s", k);
1306 return val;
1307 }
1308
1309 int git_config_system(void)
1310 {
1311 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1312 }
1313
1314 static int do_git_config_sequence(config_fn_t fn, void *data)
1315 {
1316 int ret = 0;
1317 char *xdg_config = xdg_config_home("config");
1318 char *user_config = expand_user_path("~/.gitconfig");
1319 char *repo_config = have_git_dir() ? git_pathdup("config") : NULL;
1320
1321 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1322 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1323 ret += git_config_from_file(fn, git_etc_gitconfig(),
1324 data);
1325
1326 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1327 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1328 ret += git_config_from_file(fn, xdg_config, data);
1329
1330 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1331 ret += git_config_from_file(fn, user_config, data);
1332
1333 current_parsing_scope = CONFIG_SCOPE_REPO;
1334 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1335 ret += git_config_from_file(fn, repo_config, data);
1336
1337 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1338 if (git_config_from_parameters(fn, data) < 0)
1339 die(_("unable to parse command-line config"));
1340
1341 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1342 free(xdg_config);
1343 free(user_config);
1344 free(repo_config);
1345 return ret;
1346 }
1347
1348 int git_config_with_options(config_fn_t fn, void *data,
1349 struct git_config_source *config_source,
1350 int respect_includes)
1351 {
1352 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1353
1354 if (respect_includes) {
1355 inc.fn = fn;
1356 inc.data = data;
1357 fn = git_config_include;
1358 data = &inc;
1359 }
1360
1361 /*
1362 * If we have a specific filename, use it. Otherwise, follow the
1363 * regular lookup sequence.
1364 */
1365 if (config_source && config_source->use_stdin)
1366 return git_config_from_stdin(fn, data);
1367 else if (config_source && config_source->file)
1368 return git_config_from_file(fn, config_source->file, data);
1369 else if (config_source && config_source->blob)
1370 return git_config_from_blob_ref(fn, config_source->blob, data);
1371
1372 return do_git_config_sequence(fn, data);
1373 }
1374
1375 static void git_config_raw(config_fn_t fn, void *data)
1376 {
1377 if (git_config_with_options(fn, data, NULL, 1) < 0)
1378 /*
1379 * git_config_with_options() normally returns only
1380 * zero, as most errors are fatal, and
1381 * non-fatal potential errors are guarded by "if"
1382 * statements that are entered only when no error is
1383 * possible.
1384 *
1385 * If we ever encounter a non-fatal error, it means
1386 * something went really wrong and we should stop
1387 * immediately.
1388 */
1389 die(_("unknown error occurred while reading the configuration files"));
1390 }
1391
1392 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1393 {
1394 int i, value_index;
1395 struct string_list *values;
1396 struct config_set_element *entry;
1397 struct configset_list *list = &cs->list;
1398
1399 for (i = 0; i < list->nr; i++) {
1400 entry = list->items[i].e;
1401 value_index = list->items[i].value_index;
1402 values = &entry->value_list;
1403
1404 current_config_kvi = values->items[value_index].util;
1405
1406 if (fn(entry->key, values->items[value_index].string, data) < 0)
1407 git_die_config_linenr(entry->key,
1408 current_config_kvi->filename,
1409 current_config_kvi->linenr);
1410
1411 current_config_kvi = NULL;
1412 }
1413 }
1414
1415 static void git_config_check_init(void);
1416
1417 void git_config(config_fn_t fn, void *data)
1418 {
1419 git_config_check_init();
1420 configset_iter(&the_config_set, fn, data);
1421 }
1422
1423 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1424 {
1425 struct config_set_element k;
1426 struct config_set_element *found_entry;
1427 char *normalized_key;
1428 /*
1429 * `key` may come from the user, so normalize it before using it
1430 * for querying entries from the hashmap.
1431 */
1432 if (git_config_parse_key(key, &normalized_key, NULL))
1433 return NULL;
1434
1435 hashmap_entry_init(&k, strhash(normalized_key));
1436 k.key = normalized_key;
1437 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1438 free(normalized_key);
1439 return found_entry;
1440 }
1441
1442 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1443 {
1444 struct config_set_element *e;
1445 struct string_list_item *si;
1446 struct configset_list_item *l_item;
1447 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1448
1449 e = configset_find_element(cs, key);
1450 /*
1451 * Since the keys are being fed by git_config*() callback mechanism, they
1452 * are already normalized. So simply add them without any further munging.
1453 */
1454 if (!e) {
1455 e = xmalloc(sizeof(*e));
1456 hashmap_entry_init(e, strhash(key));
1457 e->key = xstrdup(key);
1458 string_list_init(&e->value_list, 1);
1459 hashmap_add(&cs->config_hash, e);
1460 }
1461 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1462
1463 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1464 l_item = &cs->list.items[cs->list.nr++];
1465 l_item->e = e;
1466 l_item->value_index = e->value_list.nr - 1;
1467
1468 if (!cf)
1469 die("BUG: configset_add_value has no source");
1470 if (cf->name) {
1471 kv_info->filename = strintern(cf->name);
1472 kv_info->linenr = cf->linenr;
1473 kv_info->origin_type = cf->origin_type;
1474 } else {
1475 /* for values read from `git_config_from_parameters()` */
1476 kv_info->filename = NULL;
1477 kv_info->linenr = -1;
1478 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1479 }
1480 kv_info->scope = current_parsing_scope;
1481 si->util = kv_info;
1482
1483 return 0;
1484 }
1485
1486 static int config_set_element_cmp(const struct config_set_element *e1,
1487 const struct config_set_element *e2, const void *unused)
1488 {
1489 return strcmp(e1->key, e2->key);
1490 }
1491
1492 void git_configset_init(struct config_set *cs)
1493 {
1494 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1495 cs->hash_initialized = 1;
1496 cs->list.nr = 0;
1497 cs->list.alloc = 0;
1498 cs->list.items = NULL;
1499 }
1500
1501 void git_configset_clear(struct config_set *cs)
1502 {
1503 struct config_set_element *entry;
1504 struct hashmap_iter iter;
1505 if (!cs->hash_initialized)
1506 return;
1507
1508 hashmap_iter_init(&cs->config_hash, &iter);
1509 while ((entry = hashmap_iter_next(&iter))) {
1510 free(entry->key);
1511 string_list_clear(&entry->value_list, 1);
1512 }
1513 hashmap_free(&cs->config_hash, 1);
1514 cs->hash_initialized = 0;
1515 free(cs->list.items);
1516 cs->list.nr = 0;
1517 cs->list.alloc = 0;
1518 cs->list.items = NULL;
1519 }
1520
1521 static int config_set_callback(const char *key, const char *value, void *cb)
1522 {
1523 struct config_set *cs = cb;
1524 configset_add_value(cs, key, value);
1525 return 0;
1526 }
1527
1528 int git_configset_add_file(struct config_set *cs, const char *filename)
1529 {
1530 return git_config_from_file(config_set_callback, filename, cs);
1531 }
1532
1533 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1534 {
1535 const struct string_list *values = NULL;
1536 /*
1537 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1538 * queried key in the files of the configset, the value returned will be the last
1539 * value in the value list for that key.
1540 */
1541 values = git_configset_get_value_multi(cs, key);
1542
1543 if (!values)
1544 return 1;
1545 assert(values->nr > 0);
1546 *value = values->items[values->nr - 1].string;
1547 return 0;
1548 }
1549
1550 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1551 {
1552 struct config_set_element *e = configset_find_element(cs, key);
1553 return e ? &e->value_list : NULL;
1554 }
1555
1556 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1557 {
1558 const char *value;
1559 if (!git_configset_get_value(cs, key, &value))
1560 return git_config_string(dest, key, value);
1561 else
1562 return 1;
1563 }
1564
1565 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1566 {
1567 return git_configset_get_string_const(cs, key, (const char **)dest);
1568 }
1569
1570 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1571 {
1572 const char *value;
1573 if (!git_configset_get_value(cs, key, &value)) {
1574 *dest = git_config_int(key, value);
1575 return 0;
1576 } else
1577 return 1;
1578 }
1579
1580 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1581 {
1582 const char *value;
1583 if (!git_configset_get_value(cs, key, &value)) {
1584 *dest = git_config_ulong(key, value);
1585 return 0;
1586 } else
1587 return 1;
1588 }
1589
1590 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1591 {
1592 const char *value;
1593 if (!git_configset_get_value(cs, key, &value)) {
1594 *dest = git_config_bool(key, value);
1595 return 0;
1596 } else
1597 return 1;
1598 }
1599
1600 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1601 int *is_bool, int *dest)
1602 {
1603 const char *value;
1604 if (!git_configset_get_value(cs, key, &value)) {
1605 *dest = git_config_bool_or_int(key, value, is_bool);
1606 return 0;
1607 } else
1608 return 1;
1609 }
1610
1611 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1612 {
1613 const char *value;
1614 if (!git_configset_get_value(cs, key, &value)) {
1615 *dest = git_config_maybe_bool(key, value);
1616 if (*dest == -1)
1617 return -1;
1618 return 0;
1619 } else
1620 return 1;
1621 }
1622
1623 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1624 {
1625 const char *value;
1626 if (!git_configset_get_value(cs, key, &value))
1627 return git_config_pathname(dest, key, value);
1628 else
1629 return 1;
1630 }
1631
1632 static void git_config_check_init(void)
1633 {
1634 if (the_config_set.hash_initialized)
1635 return;
1636 git_configset_init(&the_config_set);
1637 git_config_raw(config_set_callback, &the_config_set);
1638 }
1639
1640 void git_config_clear(void)
1641 {
1642 if (!the_config_set.hash_initialized)
1643 return;
1644 git_configset_clear(&the_config_set);
1645 }
1646
1647 int git_config_get_value(const char *key, const char **value)
1648 {
1649 git_config_check_init();
1650 return git_configset_get_value(&the_config_set, key, value);
1651 }
1652
1653 const struct string_list *git_config_get_value_multi(const char *key)
1654 {
1655 git_config_check_init();
1656 return git_configset_get_value_multi(&the_config_set, key);
1657 }
1658
1659 int git_config_get_string_const(const char *key, const char **dest)
1660 {
1661 int ret;
1662 git_config_check_init();
1663 ret = git_configset_get_string_const(&the_config_set, key, dest);
1664 if (ret < 0)
1665 git_die_config(key, NULL);
1666 return ret;
1667 }
1668
1669 int git_config_get_string(const char *key, char **dest)
1670 {
1671 git_config_check_init();
1672 return git_config_get_string_const(key, (const char **)dest);
1673 }
1674
1675 int git_config_get_int(const char *key, int *dest)
1676 {
1677 git_config_check_init();
1678 return git_configset_get_int(&the_config_set, key, dest);
1679 }
1680
1681 int git_config_get_ulong(const char *key, unsigned long *dest)
1682 {
1683 git_config_check_init();
1684 return git_configset_get_ulong(&the_config_set, key, dest);
1685 }
1686
1687 int git_config_get_bool(const char *key, int *dest)
1688 {
1689 git_config_check_init();
1690 return git_configset_get_bool(&the_config_set, key, dest);
1691 }
1692
1693 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1694 {
1695 git_config_check_init();
1696 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1697 }
1698
1699 int git_config_get_maybe_bool(const char *key, int *dest)
1700 {
1701 git_config_check_init();
1702 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1703 }
1704
1705 int git_config_get_pathname(const char *key, const char **dest)
1706 {
1707 int ret;
1708 git_config_check_init();
1709 ret = git_configset_get_pathname(&the_config_set, key, dest);
1710 if (ret < 0)
1711 git_die_config(key, NULL);
1712 return ret;
1713 }
1714
1715 int git_config_get_untracked_cache(void)
1716 {
1717 int val = -1;
1718 const char *v;
1719
1720 /* Hack for test programs like test-dump-untracked-cache */
1721 if (ignore_untracked_cache_config)
1722 return -1;
1723
1724 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1725 return val;
1726
1727 if (!git_config_get_value("core.untrackedcache", &v)) {
1728 if (!strcasecmp(v, "keep"))
1729 return -1;
1730
1731 error("unknown core.untrackedCache value '%s'; "
1732 "using 'keep' default value", v);
1733 return -1;
1734 }
1735
1736 return -1; /* default value */
1737 }
1738
1739 NORETURN
1740 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1741 {
1742 if (!filename)
1743 die(_("unable to parse '%s' from command-line config"), key);
1744 else
1745 die(_("bad config variable '%s' in file '%s' at line %d"),
1746 key, filename, linenr);
1747 }
1748
1749 NORETURN __attribute__((format(printf, 2, 3)))
1750 void git_die_config(const char *key, const char *err, ...)
1751 {
1752 const struct string_list *values;
1753 struct key_value_info *kv_info;
1754
1755 if (err) {
1756 va_list params;
1757 va_start(params, err);
1758 vreportf("error: ", err, params);
1759 va_end(params);
1760 }
1761 values = git_config_get_value_multi(key);
1762 kv_info = values->items[values->nr - 1].util;
1763 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1764 }
1765
1766 /*
1767 * Find all the stuff for git_config_set() below.
1768 */
1769
1770 static struct {
1771 int baselen;
1772 char *key;
1773 int do_not_match;
1774 regex_t *value_regex;
1775 int multi_replace;
1776 size_t *offset;
1777 unsigned int offset_alloc;
1778 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1779 int seen;
1780 } store;
1781
1782 static int matches(const char *key, const char *value)
1783 {
1784 if (strcmp(key, store.key))
1785 return 0; /* not ours */
1786 if (!store.value_regex)
1787 return 1; /* always matches */
1788 if (store.value_regex == CONFIG_REGEX_NONE)
1789 return 0; /* never matches */
1790
1791 return store.do_not_match ^
1792 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1793 }
1794
1795 static int store_aux(const char *key, const char *value, void *cb)
1796 {
1797 const char *ep;
1798 size_t section_len;
1799
1800 switch (store.state) {
1801 case KEY_SEEN:
1802 if (matches(key, value)) {
1803 if (store.seen == 1 && store.multi_replace == 0) {
1804 warning(_("%s has multiple values"), key);
1805 }
1806
1807 ALLOC_GROW(store.offset, store.seen + 1,
1808 store.offset_alloc);
1809
1810 store.offset[store.seen] = cf->do_ftell(cf);
1811 store.seen++;
1812 }
1813 break;
1814 case SECTION_SEEN:
1815 /*
1816 * What we are looking for is in store.key (both
1817 * section and var), and its section part is baselen
1818 * long. We found key (again, both section and var).
1819 * We would want to know if this key is in the same
1820 * section as what we are looking for. We already
1821 * know we are in the same section as what should
1822 * hold store.key.
1823 */
1824 ep = strrchr(key, '.');
1825 section_len = ep - key;
1826
1827 if ((section_len != store.baselen) ||
1828 memcmp(key, store.key, section_len+1)) {
1829 store.state = SECTION_END_SEEN;
1830 break;
1831 }
1832
1833 /*
1834 * Do not increment matches: this is no match, but we
1835 * just made sure we are in the desired section.
1836 */
1837 ALLOC_GROW(store.offset, store.seen + 1,
1838 store.offset_alloc);
1839 store.offset[store.seen] = cf->do_ftell(cf);
1840 /* fallthru */
1841 case SECTION_END_SEEN:
1842 case START:
1843 if (matches(key, value)) {
1844 ALLOC_GROW(store.offset, store.seen + 1,
1845 store.offset_alloc);
1846 store.offset[store.seen] = cf->do_ftell(cf);
1847 store.state = KEY_SEEN;
1848 store.seen++;
1849 } else {
1850 if (strrchr(key, '.') - key == store.baselen &&
1851 !strncmp(key, store.key, store.baselen)) {
1852 store.state = SECTION_SEEN;
1853 ALLOC_GROW(store.offset,
1854 store.seen + 1,
1855 store.offset_alloc);
1856 store.offset[store.seen] = cf->do_ftell(cf);
1857 }
1858 }
1859 }
1860 return 0;
1861 }
1862
1863 static int write_error(const char *filename)
1864 {
1865 error("failed to write new configuration file %s", filename);
1866
1867 /* Same error code as "failed to rename". */
1868 return 4;
1869 }
1870
1871 static int store_write_section(int fd, const char *key)
1872 {
1873 const char *dot;
1874 int i, success;
1875 struct strbuf sb = STRBUF_INIT;
1876
1877 dot = memchr(key, '.', store.baselen);
1878 if (dot) {
1879 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1880 for (i = dot - key + 1; i < store.baselen; i++) {
1881 if (key[i] == '"' || key[i] == '\\')
1882 strbuf_addch(&sb, '\\');
1883 strbuf_addch(&sb, key[i]);
1884 }
1885 strbuf_addstr(&sb, "\"]\n");
1886 } else {
1887 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1888 }
1889
1890 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1891 strbuf_release(&sb);
1892
1893 return success;
1894 }
1895
1896 static int store_write_pair(int fd, const char *key, const char *value)
1897 {
1898 int i, success;
1899 int length = strlen(key + store.baselen + 1);
1900 const char *quote = "";
1901 struct strbuf sb = STRBUF_INIT;
1902
1903 /*
1904 * Check to see if the value needs to be surrounded with a dq pair.
1905 * Note that problematic characters are always backslash-quoted; this
1906 * check is about not losing leading or trailing SP and strings that
1907 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1908 * configuration parser.
1909 */
1910 if (value[0] == ' ')
1911 quote = "\"";
1912 for (i = 0; value[i]; i++)
1913 if (value[i] == ';' || value[i] == '#')
1914 quote = "\"";
1915 if (i && value[i - 1] == ' ')
1916 quote = "\"";
1917
1918 strbuf_addf(&sb, "\t%.*s = %s",
1919 length, key + store.baselen + 1, quote);
1920
1921 for (i = 0; value[i]; i++)
1922 switch (value[i]) {
1923 case '\n':
1924 strbuf_addstr(&sb, "\\n");
1925 break;
1926 case '\t':
1927 strbuf_addstr(&sb, "\\t");
1928 break;
1929 case '"':
1930 case '\\':
1931 strbuf_addch(&sb, '\\');
1932 default:
1933 strbuf_addch(&sb, value[i]);
1934 break;
1935 }
1936 strbuf_addf(&sb, "%s\n", quote);
1937
1938 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1939 strbuf_release(&sb);
1940
1941 return success;
1942 }
1943
1944 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1945 size_t offset_, int *found_bracket)
1946 {
1947 size_t equal_offset = size, bracket_offset = size;
1948 ssize_t offset;
1949
1950 contline:
1951 for (offset = offset_-2; offset > 0
1952 && contents[offset] != '\n'; offset--)
1953 switch (contents[offset]) {
1954 case '=': equal_offset = offset; break;
1955 case ']': bracket_offset = offset; break;
1956 }
1957 if (offset > 0 && contents[offset-1] == '\\') {
1958 offset_ = offset;
1959 goto contline;
1960 }
1961 if (bracket_offset < equal_offset) {
1962 *found_bracket = 1;
1963 offset = bracket_offset+1;
1964 } else
1965 offset++;
1966
1967 return offset;
1968 }
1969
1970 int git_config_set_in_file_gently(const char *config_filename,
1971 const char *key, const char *value)
1972 {
1973 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
1974 }
1975
1976 void git_config_set_in_file(const char *config_filename,
1977 const char *key, const char *value)
1978 {
1979 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1980 }
1981
1982 int git_config_set_gently(const char *key, const char *value)
1983 {
1984 return git_config_set_multivar_gently(key, value, NULL, 0);
1985 }
1986
1987 void git_config_set(const char *key, const char *value)
1988 {
1989 git_config_set_multivar(key, value, NULL, 0);
1990 }
1991
1992 /*
1993 * Auxiliary function to sanity-check and split the key into the section
1994 * identifier and variable name.
1995 *
1996 * Returns 0 on success, -1 when there is an invalid character in the key and
1997 * -2 if there is no section name in the key.
1998 *
1999 * store_key - pointer to char* which will hold a copy of the key with
2000 * lowercase section and variable name
2001 * baselen - pointer to int which will hold the length of the
2002 * section + subsection part, can be NULL
2003 */
2004 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
2005 {
2006 int i, dot, baselen;
2007 const char *last_dot = strrchr(key, '.');
2008
2009 /*
2010 * Since "key" actually contains the section name and the real
2011 * key name separated by a dot, we have to know where the dot is.
2012 */
2013
2014 if (last_dot == NULL || last_dot == key) {
2015 if (!quiet)
2016 error("key does not contain a section: %s", key);
2017 return -CONFIG_NO_SECTION_OR_NAME;
2018 }
2019
2020 if (!last_dot[1]) {
2021 if (!quiet)
2022 error("key does not contain variable name: %s", key);
2023 return -CONFIG_NO_SECTION_OR_NAME;
2024 }
2025
2026 baselen = last_dot - key;
2027 if (baselen_)
2028 *baselen_ = baselen;
2029
2030 /*
2031 * Validate the key and while at it, lower case it for matching.
2032 */
2033 if (store_key)
2034 *store_key = xmallocz(strlen(key));
2035
2036 dot = 0;
2037 for (i = 0; key[i]; i++) {
2038 unsigned char c = key[i];
2039 if (c == '.')
2040 dot = 1;
2041 /* Leave the extended basename untouched.. */
2042 if (!dot || i > baselen) {
2043 if (!iskeychar(c) ||
2044 (i == baselen + 1 && !isalpha(c))) {
2045 if (!quiet)
2046 error("invalid key: %s", key);
2047 goto out_free_ret_1;
2048 }
2049 c = tolower(c);
2050 } else if (c == '\n') {
2051 if (!quiet)
2052 error("invalid key (newline): %s", key);
2053 goto out_free_ret_1;
2054 }
2055 if (store_key)
2056 (*store_key)[i] = c;
2057 }
2058
2059 return 0;
2060
2061 out_free_ret_1:
2062 if (store_key) {
2063 free(*store_key);
2064 *store_key = NULL;
2065 }
2066 return -CONFIG_INVALID_KEY;
2067 }
2068
2069 int git_config_parse_key(const char *key, char **store_key, int *baselen)
2070 {
2071 return git_config_parse_key_1(key, store_key, baselen, 0);
2072 }
2073
2074 int git_config_key_is_valid(const char *key)
2075 {
2076 return !git_config_parse_key_1(key, NULL, NULL, 1);
2077 }
2078
2079 /*
2080 * If value==NULL, unset in (remove from) config,
2081 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2082 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2083 * (only add a new one)
2084 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2085 * else all matching key/values (regardless how many) are removed,
2086 * before the new pair is written.
2087 *
2088 * Returns 0 on success.
2089 *
2090 * This function does this:
2091 *
2092 * - it locks the config file by creating ".git/config.lock"
2093 *
2094 * - it then parses the config using store_aux() as validator to find
2095 * the position on the key/value pair to replace. If it is to be unset,
2096 * it must be found exactly once.
2097 *
2098 * - the config file is mmap()ed and the part before the match (if any) is
2099 * written to the lock file, then the changed part and the rest.
2100 *
2101 * - the config file is removed and the lock file rename()d to it.
2102 *
2103 */
2104 int git_config_set_multivar_in_file_gently(const char *config_filename,
2105 const char *key, const char *value,
2106 const char *value_regex,
2107 int multi_replace)
2108 {
2109 int fd = -1, in_fd = -1;
2110 int ret;
2111 struct lock_file *lock = NULL;
2112 char *filename_buf = NULL;
2113 char *contents = NULL;
2114 size_t contents_sz;
2115
2116 /* parse-key returns negative; flip the sign to feed exit(3) */
2117 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2118 if (ret)
2119 goto out_free;
2120
2121 store.multi_replace = multi_replace;
2122
2123 if (!config_filename)
2124 config_filename = filename_buf = git_pathdup("config");
2125
2126 /*
2127 * The lock serves a purpose in addition to locking: the new
2128 * contents of .git/config will be written into it.
2129 */
2130 lock = xcalloc(1, sizeof(struct lock_file));
2131 fd = hold_lock_file_for_update(lock, config_filename, 0);
2132 if (fd < 0) {
2133 error_errno("could not lock config file %s", config_filename);
2134 free(store.key);
2135 ret = CONFIG_NO_LOCK;
2136 goto out_free;
2137 }
2138
2139 /*
2140 * If .git/config does not exist yet, write a minimal version.
2141 */
2142 in_fd = open(config_filename, O_RDONLY);
2143 if ( in_fd < 0 ) {
2144 free(store.key);
2145
2146 if ( ENOENT != errno ) {
2147 error_errno("opening %s", config_filename);
2148 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2149 goto out_free;
2150 }
2151 /* if nothing to unset, error out */
2152 if (value == NULL) {
2153 ret = CONFIG_NOTHING_SET;
2154 goto out_free;
2155 }
2156
2157 store.key = (char *)key;
2158 if (!store_write_section(fd, key) ||
2159 !store_write_pair(fd, key, value))
2160 goto write_err_out;
2161 } else {
2162 struct stat st;
2163 size_t copy_begin, copy_end;
2164 int i, new_line = 0;
2165
2166 if (value_regex == NULL)
2167 store.value_regex = NULL;
2168 else if (value_regex == CONFIG_REGEX_NONE)
2169 store.value_regex = CONFIG_REGEX_NONE;
2170 else {
2171 if (value_regex[0] == '!') {
2172 store.do_not_match = 1;
2173 value_regex++;
2174 } else
2175 store.do_not_match = 0;
2176
2177 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2178 if (regcomp(store.value_regex, value_regex,
2179 REG_EXTENDED)) {
2180 error("invalid pattern: %s", value_regex);
2181 free(store.value_regex);
2182 ret = CONFIG_INVALID_PATTERN;
2183 goto out_free;
2184 }
2185 }
2186
2187 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2188 store.offset[0] = 0;
2189 store.state = START;
2190 store.seen = 0;
2191
2192 /*
2193 * After this, store.offset will contain the *end* offset
2194 * of the last match, or remain at 0 if no match was found.
2195 * As a side effect, we make sure to transform only a valid
2196 * existing config file.
2197 */
2198 if (git_config_from_file(store_aux, config_filename, NULL)) {
2199 error("invalid config file %s", config_filename);
2200 free(store.key);
2201 if (store.value_regex != NULL &&
2202 store.value_regex != CONFIG_REGEX_NONE) {
2203 regfree(store.value_regex);
2204 free(store.value_regex);
2205 }
2206 ret = CONFIG_INVALID_FILE;
2207 goto out_free;
2208 }
2209
2210 free(store.key);
2211 if (store.value_regex != NULL &&
2212 store.value_regex != CONFIG_REGEX_NONE) {
2213 regfree(store.value_regex);
2214 free(store.value_regex);
2215 }
2216
2217 /* if nothing to unset, or too many matches, error out */
2218 if ((store.seen == 0 && value == NULL) ||
2219 (store.seen > 1 && multi_replace == 0)) {
2220 ret = CONFIG_NOTHING_SET;
2221 goto out_free;
2222 }
2223
2224 if (fstat(in_fd, &st) == -1) {
2225 error_errno(_("fstat on %s failed"), config_filename);
2226 ret = CONFIG_INVALID_FILE;
2227 goto out_free;
2228 }
2229
2230 contents_sz = xsize_t(st.st_size);
2231 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2232 MAP_PRIVATE, in_fd, 0);
2233 if (contents == MAP_FAILED) {
2234 if (errno == ENODEV && S_ISDIR(st.st_mode))
2235 errno = EISDIR;
2236 error_errno("unable to mmap '%s'", config_filename);
2237 ret = CONFIG_INVALID_FILE;
2238 contents = NULL;
2239 goto out_free;
2240 }
2241 close(in_fd);
2242 in_fd = -1;
2243
2244 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2245 error_errno("chmod on %s failed", get_lock_file_path(lock));
2246 ret = CONFIG_NO_WRITE;
2247 goto out_free;
2248 }
2249
2250 if (store.seen == 0)
2251 store.seen = 1;
2252
2253 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2254 if (store.offset[i] == 0) {
2255 store.offset[i] = copy_end = contents_sz;
2256 } else if (store.state != KEY_SEEN) {
2257 copy_end = store.offset[i];
2258 } else
2259 copy_end = find_beginning_of_line(
2260 contents, contents_sz,
2261 store.offset[i]-2, &new_line);
2262
2263 if (copy_end > 0 && contents[copy_end-1] != '\n')
2264 new_line = 1;
2265
2266 /* write the first part of the config */
2267 if (copy_end > copy_begin) {
2268 if (write_in_full(fd, contents + copy_begin,
2269 copy_end - copy_begin) <
2270 copy_end - copy_begin)
2271 goto write_err_out;
2272 if (new_line &&
2273 write_str_in_full(fd, "\n") != 1)
2274 goto write_err_out;
2275 }
2276 copy_begin = store.offset[i];
2277 }
2278
2279 /* write the pair (value == NULL means unset) */
2280 if (value != NULL) {
2281 if (store.state == START) {
2282 if (!store_write_section(fd, key))
2283 goto write_err_out;
2284 }
2285 if (!store_write_pair(fd, key, value))
2286 goto write_err_out;
2287 }
2288
2289 /* write the rest of the config */
2290 if (copy_begin < contents_sz)
2291 if (write_in_full(fd, contents + copy_begin,
2292 contents_sz - copy_begin) <
2293 contents_sz - copy_begin)
2294 goto write_err_out;
2295
2296 munmap(contents, contents_sz);
2297 contents = NULL;
2298 }
2299
2300 if (commit_lock_file(lock) < 0) {
2301 error_errno("could not write config file %s", config_filename);
2302 ret = CONFIG_NO_WRITE;
2303 lock = NULL;
2304 goto out_free;
2305 }
2306
2307 /*
2308 * lock is committed, so don't try to roll it back below.
2309 * NOTE: Since lockfile.c keeps a linked list of all created
2310 * lock_file structures, it isn't safe to free(lock). It's
2311 * better to just leave it hanging around.
2312 */
2313 lock = NULL;
2314 ret = 0;
2315
2316 /* Invalidate the config cache */
2317 git_config_clear();
2318
2319 out_free:
2320 if (lock)
2321 rollback_lock_file(lock);
2322 free(filename_buf);
2323 if (contents)
2324 munmap(contents, contents_sz);
2325 if (in_fd >= 0)
2326 close(in_fd);
2327 return ret;
2328
2329 write_err_out:
2330 ret = write_error(get_lock_file_path(lock));
2331 goto out_free;
2332
2333 }
2334
2335 void git_config_set_multivar_in_file(const char *config_filename,
2336 const char *key, const char *value,
2337 const char *value_regex, int multi_replace)
2338 {
2339 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2340 value_regex, multi_replace))
2341 return;
2342 if (value)
2343 die(_("could not set '%s' to '%s'"), key, value);
2344 else
2345 die(_("could not unset '%s'"), key);
2346 }
2347
2348 int git_config_set_multivar_gently(const char *key, const char *value,
2349 const char *value_regex, int multi_replace)
2350 {
2351 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2352 multi_replace);
2353 }
2354
2355 void git_config_set_multivar(const char *key, const char *value,
2356 const char *value_regex, int multi_replace)
2357 {
2358 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2359 multi_replace);
2360 }
2361
2362 static int section_name_match (const char *buf, const char *name)
2363 {
2364 int i = 0, j = 0, dot = 0;
2365 if (buf[i] != '[')
2366 return 0;
2367 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2368 if (!dot && isspace(buf[i])) {
2369 dot = 1;
2370 if (name[j++] != '.')
2371 break;
2372 for (i++; isspace(buf[i]); i++)
2373 ; /* do nothing */
2374 if (buf[i] != '"')
2375 break;
2376 continue;
2377 }
2378 if (buf[i] == '\\' && dot)
2379 i++;
2380 else if (buf[i] == '"' && dot) {
2381 for (i++; isspace(buf[i]); i++)
2382 ; /* do_nothing */
2383 break;
2384 }
2385 if (buf[i] != name[j++])
2386 break;
2387 }
2388 if (buf[i] == ']' && name[j] == 0) {
2389 /*
2390 * We match, now just find the right length offset by
2391 * gobbling up any whitespace after it, as well
2392 */
2393 i++;
2394 for (; buf[i] && isspace(buf[i]); i++)
2395 ; /* do nothing */
2396 return i;
2397 }
2398 return 0;
2399 }
2400
2401 static int section_name_is_ok(const char *name)
2402 {
2403 /* Empty section names are bogus. */
2404 if (!*name)
2405 return 0;
2406
2407 /*
2408 * Before a dot, we must be alphanumeric or dash. After the first dot,
2409 * anything goes, so we can stop checking.
2410 */
2411 for (; *name && *name != '.'; name++)
2412 if (*name != '-' && !isalnum(*name))
2413 return 0;
2414 return 1;
2415 }
2416
2417 /* if new_name == NULL, the section is removed instead */
2418 int git_config_rename_section_in_file(const char *config_filename,
2419 const char *old_name, const char *new_name)
2420 {
2421 int ret = 0, remove = 0;
2422 char *filename_buf = NULL;
2423 struct lock_file *lock;
2424 int out_fd;
2425 char buf[1024];
2426 FILE *config_file;
2427 struct stat st;
2428
2429 if (new_name && !section_name_is_ok(new_name)) {
2430 ret = error("invalid section name: %s", new_name);
2431 goto out_no_rollback;
2432 }
2433
2434 if (!config_filename)
2435 config_filename = filename_buf = git_pathdup("config");
2436
2437 lock = xcalloc(1, sizeof(struct lock_file));
2438 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2439 if (out_fd < 0) {
2440 ret = error("could not lock config file %s", config_filename);
2441 goto out;
2442 }
2443
2444 if (!(config_file = fopen(config_filename, "rb"))) {
2445 /* no config file means nothing to rename, no error */
2446 goto commit_and_out;
2447 }
2448
2449 if (fstat(fileno(config_file), &st) == -1) {
2450 ret = error_errno(_("fstat on %s failed"), config_filename);
2451 goto out;
2452 }
2453
2454 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2455 ret = error_errno("chmod on %s failed",
2456 get_lock_file_path(lock));
2457 goto out;
2458 }
2459
2460 while (fgets(buf, sizeof(buf), config_file)) {
2461 int i;
2462 int length;
2463 char *output = buf;
2464 for (i = 0; buf[i] && isspace(buf[i]); i++)
2465 ; /* do nothing */
2466 if (buf[i] == '[') {
2467 /* it's a section */
2468 int offset = section_name_match(&buf[i], old_name);
2469 if (offset > 0) {
2470 ret++;
2471 if (new_name == NULL) {
2472 remove = 1;
2473 continue;
2474 }
2475 store.baselen = strlen(new_name);
2476 if (!store_write_section(out_fd, new_name)) {
2477 ret = write_error(get_lock_file_path(lock));
2478 goto out;
2479 }
2480 /*
2481 * We wrote out the new section, with
2482 * a newline, now skip the old
2483 * section's length
2484 */
2485 output += offset + i;
2486 if (strlen(output) > 0) {
2487 /*
2488 * More content means there's
2489 * a declaration to put on the
2490 * next line; indent with a
2491 * tab
2492 */
2493 output -= 1;
2494 output[0] = '\t';
2495 }
2496 }
2497 remove = 0;
2498 }
2499 if (remove)
2500 continue;
2501 length = strlen(output);
2502 if (write_in_full(out_fd, output, length) != length) {
2503 ret = write_error(get_lock_file_path(lock));
2504 goto out;
2505 }
2506 }
2507 fclose(config_file);
2508 commit_and_out:
2509 if (commit_lock_file(lock) < 0)
2510 ret = error_errno("could not write config file %s",
2511 config_filename);
2512 out:
2513 rollback_lock_file(lock);
2514 out_no_rollback:
2515 free(filename_buf);
2516 return ret;
2517 }
2518
2519 int git_config_rename_section(const char *old_name, const char *new_name)
2520 {
2521 return git_config_rename_section_in_file(NULL, old_name, new_name);
2522 }
2523
2524 /*
2525 * Call this to report error for your variable that should not
2526 * get a boolean value (i.e. "[my] var" means "true").
2527 */
2528 #undef config_error_nonbool
2529 int config_error_nonbool(const char *var)
2530 {
2531 return error("missing value for '%s'", var);
2532 }
2533
2534 int parse_config_key(const char *var,
2535 const char *section,
2536 const char **subsection, int *subsection_len,
2537 const char **key)
2538 {
2539 int section_len = strlen(section);
2540 const char *dot;
2541
2542 /* Does it start with "section." ? */
2543 if (!starts_with(var, section) || var[section_len] != '.')
2544 return -1;
2545
2546 /*
2547 * Find the key; we don't know yet if we have a subsection, but we must
2548 * parse backwards from the end, since the subsection may have dots in
2549 * it, too.
2550 */
2551 dot = strrchr(var, '.');
2552 *key = dot + 1;
2553
2554 /* Did we have a subsection at all? */
2555 if (dot == var + section_len) {
2556 *subsection = NULL;
2557 *subsection_len = 0;
2558 }
2559 else {
2560 *subsection = var + section_len + 1;
2561 *subsection_len = dot - *subsection;
2562 }
2563
2564 return 0;
2565 }
2566
2567 const char *current_config_origin_type(void)
2568 {
2569 int type;
2570 if (current_config_kvi)
2571 type = current_config_kvi->origin_type;
2572 else if(cf)
2573 type = cf->origin_type;
2574 else
2575 die("BUG: current_config_origin_type called outside config callback");
2576
2577 switch (type) {
2578 case CONFIG_ORIGIN_BLOB:
2579 return "blob";
2580 case CONFIG_ORIGIN_FILE:
2581 return "file";
2582 case CONFIG_ORIGIN_STDIN:
2583 return "standard input";
2584 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2585 return "submodule-blob";
2586 case CONFIG_ORIGIN_CMDLINE:
2587 return "command line";
2588 default:
2589 die("BUG: unknown config origin type");
2590 }
2591 }
2592
2593 const char *current_config_name(void)
2594 {
2595 const char *name;
2596 if (current_config_kvi)
2597 name = current_config_kvi->filename;
2598 else if (cf)
2599 name = cf->name;
2600 else
2601 die("BUG: current_config_name called outside config callback");
2602 return name ? name : "";
2603 }
2604
2605 enum config_scope current_config_scope(void)
2606 {
2607 if (current_config_kvi)
2608 return current_config_kvi->scope;
2609 else
2610 return current_parsing_scope;
2611 }
Eric Wong's git-svn branch