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delta_base_cache: use list.h for LRU
[git/debian.git] / config.c
blob584cacf148336b90d9a5d87949b7594021ced42b
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 zlib_compression_seen;
70
71 /*
72 * Default config_set that contains key-value pairs from the usual set of config
73 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
74 * config file and the global /etc/gitconfig)
75 */
76 static struct config_set the_config_set;
77
78 static int config_file_fgetc(struct config_source *conf)
79 {
80 return getc_unlocked(conf->u.file);
81 }
82
83 static int config_file_ungetc(int c, struct config_source *conf)
84 {
85 return ungetc(c, conf->u.file);
86 }
87
88 static long config_file_ftell(struct config_source *conf)
89 {
90 return ftell(conf->u.file);
91 }
92
93
94 static int config_buf_fgetc(struct config_source *conf)
95 {
96 if (conf->u.buf.pos < conf->u.buf.len)
97 return conf->u.buf.buf[conf->u.buf.pos++];
98
99 return EOF;
100 }
101
102 static int config_buf_ungetc(int c, struct config_source *conf)
103 {
104 if (conf->u.buf.pos > 0) {
105 conf->u.buf.pos--;
106 if (conf->u.buf.buf[conf->u.buf.pos] != c)
107 die("BUG: config_buf can only ungetc the same character");
108 return c;
109 }
110
111 return EOF;
112 }
113
114 static long config_buf_ftell(struct config_source *conf)
115 {
116 return conf->u.buf.pos;
117 }
118
119 #define MAX_INCLUDE_DEPTH 10
120 static const char include_depth_advice[] =
121 "exceeded maximum include depth (%d) while including\n"
122 " %s\n"
123 "from\n"
124 " %s\n"
125 "Do you have circular includes?";
126 static int handle_path_include(const char *path, struct config_include_data *inc)
127 {
128 int ret = 0;
129 struct strbuf buf = STRBUF_INIT;
130 char *expanded;
131
132 if (!path)
133 return config_error_nonbool("include.path");
134
135 expanded = expand_user_path(path);
136 if (!expanded)
137 return error("could not expand include path '%s'", path);
138 path = expanded;
139
140 /*
141 * Use an absolute path as-is, but interpret relative paths
142 * based on the including config file.
143 */
144 if (!is_absolute_path(path)) {
145 char *slash;
146
147 if (!cf || !cf->path)
148 return error("relative config includes must come from files");
149
150 slash = find_last_dir_sep(cf->path);
151 if (slash)
152 strbuf_add(&buf, cf->path, slash - cf->path + 1);
153 strbuf_addstr(&buf, path);
154 path = buf.buf;
155 }
156
157 if (!access_or_die(path, R_OK, 0)) {
158 if (++inc->depth > MAX_INCLUDE_DEPTH)
159 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
160 !cf ? "<unknown>" :
161 cf->name ? cf->name :
162 "the command line");
163 ret = git_config_from_file(git_config_include, path, inc);
164 inc->depth--;
165 }
166 strbuf_release(&buf);
167 free(expanded);
168 return ret;
169 }
170
171 int git_config_include(const char *var, const char *value, void *data)
172 {
173 struct config_include_data *inc = data;
174 int ret;
175
176 /*
177 * Pass along all values, including "include" directives; this makes it
178 * possible to query information on the includes themselves.
179 */
180 ret = inc->fn(var, value, inc->data);
181 if (ret < 0)
182 return ret;
183
184 if (!strcmp(var, "include.path"))
185 ret = handle_path_include(value, inc);
186 return ret;
187 }
188
189 void git_config_push_parameter(const char *text)
190 {
191 struct strbuf env = STRBUF_INIT;
192 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
193 if (old && *old) {
194 strbuf_addstr(&env, old);
195 strbuf_addch(&env, ' ');
196 }
197 sq_quote_buf(&env, text);
198 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
199 strbuf_release(&env);
200 }
201
202 int git_config_parse_parameter(const char *text,
203 config_fn_t fn, void *data)
204 {
205 const char *value;
206 struct strbuf **pair;
207
208 pair = strbuf_split_str(text, '=', 2);
209 if (!pair[0])
210 return error("bogus config parameter: %s", text);
211
212 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
213 strbuf_setlen(pair[0], pair[0]->len - 1);
214 value = pair[1] ? pair[1]->buf : "";
215 } else {
216 value = NULL;
217 }
218
219 strbuf_trim(pair[0]);
220 if (!pair[0]->len) {
221 strbuf_list_free(pair);
222 return error("bogus config parameter: %s", text);
223 }
224 strbuf_tolower(pair[0]);
225 if (fn(pair[0]->buf, value, data) < 0) {
226 strbuf_list_free(pair);
227 return -1;
228 }
229 strbuf_list_free(pair);
230 return 0;
231 }
232
233 int git_config_from_parameters(config_fn_t fn, void *data)
234 {
235 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
236 int ret = 0;
237 char *envw;
238 const char **argv = NULL;
239 int nr = 0, alloc = 0;
240 int i;
241 struct config_source source;
242
243 if (!env)
244 return 0;
245
246 memset(&source, 0, sizeof(source));
247 source.prev = cf;
248 source.origin_type = CONFIG_ORIGIN_CMDLINE;
249 cf = &source;
250
251 /* sq_dequote will write over it */
252 envw = xstrdup(env);
253
254 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
255 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
256 goto out;
257 }
258
259 for (i = 0; i < nr; i++) {
260 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
261 ret = -1;
262 goto out;
263 }
264 }
265
266 out:
267 free(argv);
268 free(envw);
269 cf = source.prev;
270 return ret;
271 }
272
273 static int get_next_char(void)
274 {
275 int c = cf->do_fgetc(cf);
276
277 if (c == '\r') {
278 /* DOS like systems */
279 c = cf->do_fgetc(cf);
280 if (c != '\n') {
281 if (c != EOF)
282 cf->do_ungetc(c, cf);
283 c = '\r';
284 }
285 }
286 if (c == '\n')
287 cf->linenr++;
288 if (c == EOF) {
289 cf->eof = 1;
290 cf->linenr++;
291 c = '\n';
292 }
293 return c;
294 }
295
296 static char *parse_value(void)
297 {
298 int quote = 0, comment = 0, space = 0;
299
300 strbuf_reset(&cf->value);
301 for (;;) {
302 int c = get_next_char();
303 if (c == '\n') {
304 if (quote) {
305 cf->linenr--;
306 return NULL;
307 }
308 return cf->value.buf;
309 }
310 if (comment)
311 continue;
312 if (isspace(c) && !quote) {
313 if (cf->value.len)
314 space++;
315 continue;
316 }
317 if (!quote) {
318 if (c == ';' || c == '#') {
319 comment = 1;
320 continue;
321 }
322 }
323 for (; space; space--)
324 strbuf_addch(&cf->value, ' ');
325 if (c == '\\') {
326 c = get_next_char();
327 switch (c) {
328 case '\n':
329 continue;
330 case 't':
331 c = '\t';
332 break;
333 case 'b':
334 c = '\b';
335 break;
336 case 'n':
337 c = '\n';
338 break;
339 /* Some characters escape as themselves */
340 case '\\': case '"':
341 break;
342 /* Reject unknown escape sequences */
343 default:
344 return NULL;
345 }
346 strbuf_addch(&cf->value, c);
347 continue;
348 }
349 if (c == '"') {
350 quote = 1-quote;
351 continue;
352 }
353 strbuf_addch(&cf->value, c);
354 }
355 }
356
357 static inline int iskeychar(int c)
358 {
359 return isalnum(c) || c == '-';
360 }
361
362 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
363 {
364 int c;
365 char *value;
366 int ret;
367
368 /* Get the full name */
369 for (;;) {
370 c = get_next_char();
371 if (cf->eof)
372 break;
373 if (!iskeychar(c))
374 break;
375 strbuf_addch(name, tolower(c));
376 }
377
378 while (c == ' ' || c == '\t')
379 c = get_next_char();
380
381 value = NULL;
382 if (c != '\n') {
383 if (c != '=')
384 return -1;
385 value = parse_value();
386 if (!value)
387 return -1;
388 }
389 /*
390 * We already consumed the \n, but we need linenr to point to
391 * the line we just parsed during the call to fn to get
392 * accurate line number in error messages.
393 */
394 cf->linenr--;
395 ret = fn(name->buf, value, data);
396 cf->linenr++;
397 return ret;
398 }
399
400 static int get_extended_base_var(struct strbuf *name, int c)
401 {
402 do {
403 if (c == '\n')
404 goto error_incomplete_line;
405 c = get_next_char();
406 } while (isspace(c));
407
408 /* We require the format to be '[base "extension"]' */
409 if (c != '"')
410 return -1;
411 strbuf_addch(name, '.');
412
413 for (;;) {
414 int c = get_next_char();
415 if (c == '\n')
416 goto error_incomplete_line;
417 if (c == '"')
418 break;
419 if (c == '\\') {
420 c = get_next_char();
421 if (c == '\n')
422 goto error_incomplete_line;
423 }
424 strbuf_addch(name, c);
425 }
426
427 /* Final ']' */
428 if (get_next_char() != ']')
429 return -1;
430 return 0;
431 error_incomplete_line:
432 cf->linenr--;
433 return -1;
434 }
435
436 static int get_base_var(struct strbuf *name)
437 {
438 for (;;) {
439 int c = get_next_char();
440 if (cf->eof)
441 return -1;
442 if (c == ']')
443 return 0;
444 if (isspace(c))
445 return get_extended_base_var(name, c);
446 if (!iskeychar(c) && c != '.')
447 return -1;
448 strbuf_addch(name, tolower(c));
449 }
450 }
451
452 static int git_parse_source(config_fn_t fn, void *data)
453 {
454 int comment = 0;
455 int baselen = 0;
456 struct strbuf *var = &cf->var;
457 int error_return = 0;
458 char *error_msg = NULL;
459
460 /* U+FEFF Byte Order Mark in UTF8 */
461 const char *bomptr = utf8_bom;
462
463 for (;;) {
464 int c = get_next_char();
465 if (bomptr && *bomptr) {
466 /* We are at the file beginning; skip UTF8-encoded BOM
467 * if present. Sane editors won't put this in on their
468 * own, but e.g. Windows Notepad will do it happily. */
469 if (c == (*bomptr & 0377)) {
470 bomptr++;
471 continue;
472 } else {
473 /* Do not tolerate partial BOM. */
474 if (bomptr != utf8_bom)
475 break;
476 /* No BOM at file beginning. Cool. */
477 bomptr = NULL;
478 }
479 }
480 if (c == '\n') {
481 if (cf->eof)
482 return 0;
483 comment = 0;
484 continue;
485 }
486 if (comment || isspace(c))
487 continue;
488 if (c == '#' || c == ';') {
489 comment = 1;
490 continue;
491 }
492 if (c == '[') {
493 /* Reset prior to determining a new stem */
494 strbuf_reset(var);
495 if (get_base_var(var) < 0 || var->len < 1)
496 break;
497 strbuf_addch(var, '.');
498 baselen = var->len;
499 continue;
500 }
501 if (!isalpha(c))
502 break;
503 /*
504 * Truncate the var name back to the section header
505 * stem prior to grabbing the suffix part of the name
506 * and the value.
507 */
508 strbuf_setlen(var, baselen);
509 strbuf_addch(var, tolower(c));
510 if (get_value(fn, data, var) < 0)
511 break;
512 }
513
514 switch (cf->origin_type) {
515 case CONFIG_ORIGIN_BLOB:
516 error_msg = xstrfmt(_("bad config line %d in blob %s"),
517 cf->linenr, cf->name);
518 break;
519 case CONFIG_ORIGIN_FILE:
520 error_msg = xstrfmt(_("bad config line %d in file %s"),
521 cf->linenr, cf->name);
522 break;
523 case CONFIG_ORIGIN_STDIN:
524 error_msg = xstrfmt(_("bad config line %d in standard input"),
525 cf->linenr);
526 break;
527 case CONFIG_ORIGIN_SUBMODULE_BLOB:
528 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
529 cf->linenr, cf->name);
530 break;
531 case CONFIG_ORIGIN_CMDLINE:
532 error_msg = xstrfmt(_("bad config line %d in command line %s"),
533 cf->linenr, cf->name);
534 break;
535 default:
536 error_msg = xstrfmt(_("bad config line %d in %s"),
537 cf->linenr, cf->name);
538 }
539
540 if (cf->die_on_error)
541 die("%s", error_msg);
542 else
543 error_return = error("%s", error_msg);
544
545 free(error_msg);
546 return error_return;
547 }
548
549 static int parse_unit_factor(const char *end, uintmax_t *val)
550 {
551 if (!*end)
552 return 1;
553 else if (!strcasecmp(end, "k")) {
554 *val *= 1024;
555 return 1;
556 }
557 else if (!strcasecmp(end, "m")) {
558 *val *= 1024 * 1024;
559 return 1;
560 }
561 else if (!strcasecmp(end, "g")) {
562 *val *= 1024 * 1024 * 1024;
563 return 1;
564 }
565 return 0;
566 }
567
568 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
569 {
570 if (value && *value) {
571 char *end;
572 intmax_t val;
573 uintmax_t uval;
574 uintmax_t factor = 1;
575
576 errno = 0;
577 val = strtoimax(value, &end, 0);
578 if (errno == ERANGE)
579 return 0;
580 if (!parse_unit_factor(end, &factor)) {
581 errno = EINVAL;
582 return 0;
583 }
584 uval = labs(val);
585 uval *= factor;
586 if (uval > max || labs(val) > uval) {
587 errno = ERANGE;
588 return 0;
589 }
590 val *= factor;
591 *ret = val;
592 return 1;
593 }
594 errno = EINVAL;
595 return 0;
596 }
597
598 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
599 {
600 if (value && *value) {
601 char *end;
602 uintmax_t val;
603 uintmax_t oldval;
604
605 errno = 0;
606 val = strtoumax(value, &end, 0);
607 if (errno == ERANGE)
608 return 0;
609 oldval = val;
610 if (!parse_unit_factor(end, &val)) {
611 errno = EINVAL;
612 return 0;
613 }
614 if (val > max || oldval > val) {
615 errno = ERANGE;
616 return 0;
617 }
618 *ret = val;
619 return 1;
620 }
621 errno = EINVAL;
622 return 0;
623 }
624
625 static int git_parse_int(const char *value, int *ret)
626 {
627 intmax_t tmp;
628 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
629 return 0;
630 *ret = tmp;
631 return 1;
632 }
633
634 static int git_parse_int64(const char *value, int64_t *ret)
635 {
636 intmax_t tmp;
637 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
638 return 0;
639 *ret = tmp;
640 return 1;
641 }
642
643 int git_parse_ulong(const char *value, unsigned long *ret)
644 {
645 uintmax_t tmp;
646 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
647 return 0;
648 *ret = tmp;
649 return 1;
650 }
651
652 NORETURN
653 static void die_bad_number(const char *name, const char *value)
654 {
655 if (!value)
656 value = "";
657
658 if (!(cf && cf->name))
659 die(errno == ERANGE
660 ? _("bad numeric config value '%s' for '%s': out of range")
661 : _("bad numeric config value '%s' for '%s': invalid unit"),
662 value, name);
663
664 switch (cf->origin_type) {
665 case CONFIG_ORIGIN_BLOB:
666 die(errno == ERANGE
667 ? _("bad numeric config value '%s' for '%s' in blob %s: out of range")
668 : _("bad numeric config value '%s' for '%s' in blob %s: invalid unit"),
669 value, name, cf->name);
670 case CONFIG_ORIGIN_FILE:
671 die(errno == ERANGE
672 ? _("bad numeric config value '%s' for '%s' in file %s: out of range")
673 : _("bad numeric config value '%s' for '%s' in file %s: invalid unit"),
674 value, name, cf->name);
675 case CONFIG_ORIGIN_STDIN:
676 die(errno == ERANGE
677 ? _("bad numeric config value '%s' for '%s' in standard input: out of range")
678 : _("bad numeric config value '%s' for '%s' in standard input: invalid unit"),
679 value, name);
680 case CONFIG_ORIGIN_SUBMODULE_BLOB:
681 die(errno == ERANGE
682 ? _("bad numeric config value '%s' for '%s' in submodule-blob %s: out of range")
683 : _("bad numeric config value '%s' for '%s' in submodule-blob %s: invalid unit"),
684 value, name, cf->name);
685 case CONFIG_ORIGIN_CMDLINE:
686 die(errno == ERANGE
687 ? _("bad numeric config value '%s' for '%s' in command line %s: out of range")
688 : _("bad numeric config value '%s' for '%s' in command line %s: invalid unit"),
689 value, name, cf->name);
690 default:
691 die(errno == ERANGE
692 ? _("bad numeric config value '%s' for '%s' in %s: out of range")
693 : _("bad numeric config value '%s' for '%s' in %s: invalid unit"),
694 value, name, cf->name);
695 }
696 }
697
698 int git_config_int(const char *name, const char *value)
699 {
700 int ret;
701 if (!git_parse_int(value, &ret))
702 die_bad_number(name, value);
703 return ret;
704 }
705
706 int64_t git_config_int64(const char *name, const char *value)
707 {
708 int64_t ret;
709 if (!git_parse_int64(value, &ret))
710 die_bad_number(name, value);
711 return ret;
712 }
713
714 unsigned long git_config_ulong(const char *name, const char *value)
715 {
716 unsigned long ret;
717 if (!git_parse_ulong(value, &ret))
718 die_bad_number(name, value);
719 return ret;
720 }
721
722 int git_parse_maybe_bool(const char *value)
723 {
724 if (!value)
725 return 1;
726 if (!*value)
727 return 0;
728 if (!strcasecmp(value, "true")
729 || !strcasecmp(value, "yes")
730 || !strcasecmp(value, "on"))
731 return 1;
732 if (!strcasecmp(value, "false")
733 || !strcasecmp(value, "no")
734 || !strcasecmp(value, "off"))
735 return 0;
736 return -1;
737 }
738
739 int git_config_maybe_bool(const char *name, const char *value)
740 {
741 int v = git_parse_maybe_bool(value);
742 if (0 <= v)
743 return v;
744 if (git_parse_int(value, &v))
745 return !!v;
746 return -1;
747 }
748
749 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
750 {
751 int v = git_parse_maybe_bool(value);
752 if (0 <= v) {
753 *is_bool = 1;
754 return v;
755 }
756 *is_bool = 0;
757 return git_config_int(name, value);
758 }
759
760 int git_config_bool(const char *name, const char *value)
761 {
762 int discard;
763 return !!git_config_bool_or_int(name, value, &discard);
764 }
765
766 int git_config_string(const char **dest, const char *var, const char *value)
767 {
768 if (!value)
769 return config_error_nonbool(var);
770 *dest = xstrdup(value);
771 return 0;
772 }
773
774 int git_config_pathname(const char **dest, const char *var, const char *value)
775 {
776 if (!value)
777 return config_error_nonbool(var);
778 *dest = expand_user_path(value);
779 if (!*dest)
780 die(_("failed to expand user dir in: '%s'"), value);
781 return 0;
782 }
783
784 static int git_default_core_config(const char *var, const char *value)
785 {
786 /* This needs a better name */
787 if (!strcmp(var, "core.filemode")) {
788 trust_executable_bit = git_config_bool(var, value);
789 return 0;
790 }
791 if (!strcmp(var, "core.trustctime")) {
792 trust_ctime = git_config_bool(var, value);
793 return 0;
794 }
795 if (!strcmp(var, "core.checkstat")) {
796 if (!strcasecmp(value, "default"))
797 check_stat = 1;
798 else if (!strcasecmp(value, "minimal"))
799 check_stat = 0;
800 }
801
802 if (!strcmp(var, "core.quotepath")) {
803 quote_path_fully = git_config_bool(var, value);
804 return 0;
805 }
806
807 if (!strcmp(var, "core.symlinks")) {
808 has_symlinks = git_config_bool(var, value);
809 return 0;
810 }
811
812 if (!strcmp(var, "core.ignorecase")) {
813 ignore_case = git_config_bool(var, value);
814 return 0;
815 }
816
817 if (!strcmp(var, "core.attributesfile"))
818 return git_config_pathname(&git_attributes_file, var, value);
819
820 if (!strcmp(var, "core.hookspath"))
821 return git_config_pathname(&git_hooks_path, var, value);
822
823 if (!strcmp(var, "core.bare")) {
824 is_bare_repository_cfg = git_config_bool(var, value);
825 return 0;
826 }
827
828 if (!strcmp(var, "core.ignorestat")) {
829 assume_unchanged = git_config_bool(var, value);
830 return 0;
831 }
832
833 if (!strcmp(var, "core.prefersymlinkrefs")) {
834 prefer_symlink_refs = git_config_bool(var, value);
835 return 0;
836 }
837
838 if (!strcmp(var, "core.logallrefupdates")) {
839 log_all_ref_updates = git_config_bool(var, value);
840 return 0;
841 }
842
843 if (!strcmp(var, "core.warnambiguousrefs")) {
844 warn_ambiguous_refs = git_config_bool(var, value);
845 return 0;
846 }
847
848 if (!strcmp(var, "core.abbrev")) {
849 int abbrev = git_config_int(var, value);
850 if (abbrev < minimum_abbrev || abbrev > 40)
851 return -1;
852 default_abbrev = abbrev;
853 return 0;
854 }
855
856 if (!strcmp(var, "core.loosecompression")) {
857 int level = git_config_int(var, value);
858 if (level == -1)
859 level = Z_DEFAULT_COMPRESSION;
860 else if (level < 0 || level > Z_BEST_COMPRESSION)
861 die(_("bad zlib compression level %d"), level);
862 zlib_compression_level = level;
863 zlib_compression_seen = 1;
864 return 0;
865 }
866
867 if (!strcmp(var, "core.compression")) {
868 int level = git_config_int(var, value);
869 if (level == -1)
870 level = Z_DEFAULT_COMPRESSION;
871 else if (level < 0 || level > Z_BEST_COMPRESSION)
872 die(_("bad zlib compression level %d"), level);
873 core_compression_level = level;
874 core_compression_seen = 1;
875 if (!zlib_compression_seen)
876 zlib_compression_level = level;
877 return 0;
878 }
879
880 if (!strcmp(var, "core.packedgitwindowsize")) {
881 int pgsz_x2 = getpagesize() * 2;
882 packed_git_window_size = git_config_ulong(var, value);
883
884 /* This value must be multiple of (pagesize * 2) */
885 packed_git_window_size /= pgsz_x2;
886 if (packed_git_window_size < 1)
887 packed_git_window_size = 1;
888 packed_git_window_size *= pgsz_x2;
889 return 0;
890 }
891
892 if (!strcmp(var, "core.bigfilethreshold")) {
893 big_file_threshold = git_config_ulong(var, value);
894 return 0;
895 }
896
897 if (!strcmp(var, "core.packedgitlimit")) {
898 packed_git_limit = git_config_ulong(var, value);
899 return 0;
900 }
901
902 if (!strcmp(var, "core.deltabasecachelimit")) {
903 delta_base_cache_limit = git_config_ulong(var, value);
904 return 0;
905 }
906
907 if (!strcmp(var, "core.autocrlf")) {
908 if (value && !strcasecmp(value, "input")) {
909 auto_crlf = AUTO_CRLF_INPUT;
910 return 0;
911 }
912 auto_crlf = git_config_bool(var, value);
913 return 0;
914 }
915
916 if (!strcmp(var, "core.safecrlf")) {
917 if (value && !strcasecmp(value, "warn")) {
918 safe_crlf = SAFE_CRLF_WARN;
919 return 0;
920 }
921 safe_crlf = git_config_bool(var, value);
922 return 0;
923 }
924
925 if (!strcmp(var, "core.eol")) {
926 if (value && !strcasecmp(value, "lf"))
927 core_eol = EOL_LF;
928 else if (value && !strcasecmp(value, "crlf"))
929 core_eol = EOL_CRLF;
930 else if (value && !strcasecmp(value, "native"))
931 core_eol = EOL_NATIVE;
932 else
933 core_eol = EOL_UNSET;
934 return 0;
935 }
936
937 if (!strcmp(var, "core.notesref")) {
938 notes_ref_name = xstrdup(value);
939 return 0;
940 }
941
942 if (!strcmp(var, "core.pager"))
943 return git_config_string(&pager_program, var, value);
944
945 if (!strcmp(var, "core.editor"))
946 return git_config_string(&editor_program, var, value);
947
948 if (!strcmp(var, "core.commentchar")) {
949 if (!value)
950 return config_error_nonbool(var);
951 else if (!strcasecmp(value, "auto"))
952 auto_comment_line_char = 1;
953 else if (value[0] && !value[1]) {
954 comment_line_char = value[0];
955 auto_comment_line_char = 0;
956 } else
957 return error("core.commentChar should only be one character");
958 return 0;
959 }
960
961 if (!strcmp(var, "core.askpass"))
962 return git_config_string(&askpass_program, var, value);
963
964 if (!strcmp(var, "core.excludesfile"))
965 return git_config_pathname(&excludes_file, var, value);
966
967 if (!strcmp(var, "core.whitespace")) {
968 if (!value)
969 return config_error_nonbool(var);
970 whitespace_rule_cfg = parse_whitespace_rule(value);
971 return 0;
972 }
973
974 if (!strcmp(var, "core.fsyncobjectfiles")) {
975 fsync_object_files = git_config_bool(var, value);
976 return 0;
977 }
978
979 if (!strcmp(var, "core.preloadindex")) {
980 core_preload_index = git_config_bool(var, value);
981 return 0;
982 }
983
984 if (!strcmp(var, "core.createobject")) {
985 if (!strcmp(value, "rename"))
986 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
987 else if (!strcmp(value, "link"))
988 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
989 else
990 die(_("invalid mode for object creation: %s"), value);
991 return 0;
992 }
993
994 if (!strcmp(var, "core.sparsecheckout")) {
995 core_apply_sparse_checkout = git_config_bool(var, value);
996 return 0;
997 }
998
999 if (!strcmp(var, "core.precomposeunicode")) {
1000 precomposed_unicode = git_config_bool(var, value);
1001 return 0;
1002 }
1003
1004 if (!strcmp(var, "core.protecthfs")) {
1005 protect_hfs = git_config_bool(var, value);
1006 return 0;
1007 }
1008
1009 if (!strcmp(var, "core.protectntfs")) {
1010 protect_ntfs = git_config_bool(var, value);
1011 return 0;
1012 }
1013
1014 if (!strcmp(var, "core.hidedotfiles")) {
1015 if (value && !strcasecmp(value, "dotgitonly"))
1016 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1017 else
1018 hide_dotfiles = git_config_bool(var, value);
1019 return 0;
1020 }
1021
1022 /* Add other config variables here and to Documentation/config.txt. */
1023 return 0;
1024 }
1025
1026 static int git_default_i18n_config(const char *var, const char *value)
1027 {
1028 if (!strcmp(var, "i18n.commitencoding"))
1029 return git_config_string(&git_commit_encoding, var, value);
1030
1031 if (!strcmp(var, "i18n.logoutputencoding"))
1032 return git_config_string(&git_log_output_encoding, var, value);
1033
1034 /* Add other config variables here and to Documentation/config.txt. */
1035 return 0;
1036 }
1037
1038 static int git_default_branch_config(const char *var, const char *value)
1039 {
1040 if (!strcmp(var, "branch.autosetupmerge")) {
1041 if (value && !strcasecmp(value, "always")) {
1042 git_branch_track = BRANCH_TRACK_ALWAYS;
1043 return 0;
1044 }
1045 git_branch_track = git_config_bool(var, value);
1046 return 0;
1047 }
1048 if (!strcmp(var, "branch.autosetuprebase")) {
1049 if (!value)
1050 return config_error_nonbool(var);
1051 else if (!strcmp(value, "never"))
1052 autorebase = AUTOREBASE_NEVER;
1053 else if (!strcmp(value, "local"))
1054 autorebase = AUTOREBASE_LOCAL;
1055 else if (!strcmp(value, "remote"))
1056 autorebase = AUTOREBASE_REMOTE;
1057 else if (!strcmp(value, "always"))
1058 autorebase = AUTOREBASE_ALWAYS;
1059 else
1060 return error("malformed value for %s", var);
1061 return 0;
1062 }
1063
1064 /* Add other config variables here and to Documentation/config.txt. */
1065 return 0;
1066 }
1067
1068 static int git_default_push_config(const char *var, const char *value)
1069 {
1070 if (!strcmp(var, "push.default")) {
1071 if (!value)
1072 return config_error_nonbool(var);
1073 else if (!strcmp(value, "nothing"))
1074 push_default = PUSH_DEFAULT_NOTHING;
1075 else if (!strcmp(value, "matching"))
1076 push_default = PUSH_DEFAULT_MATCHING;
1077 else if (!strcmp(value, "simple"))
1078 push_default = PUSH_DEFAULT_SIMPLE;
1079 else if (!strcmp(value, "upstream"))
1080 push_default = PUSH_DEFAULT_UPSTREAM;
1081 else if (!strcmp(value, "tracking")) /* deprecated */
1082 push_default = PUSH_DEFAULT_UPSTREAM;
1083 else if (!strcmp(value, "current"))
1084 push_default = PUSH_DEFAULT_CURRENT;
1085 else {
1086 error("malformed value for %s: %s", var, value);
1087 return error("Must be one of nothing, matching, simple, "
1088 "upstream or current.");
1089 }
1090 return 0;
1091 }
1092
1093 /* Add other config variables here and to Documentation/config.txt. */
1094 return 0;
1095 }
1096
1097 static int git_default_mailmap_config(const char *var, const char *value)
1098 {
1099 if (!strcmp(var, "mailmap.file"))
1100 return git_config_pathname(&git_mailmap_file, var, value);
1101 if (!strcmp(var, "mailmap.blob"))
1102 return git_config_string(&git_mailmap_blob, var, value);
1103
1104 /* Add other config variables here and to Documentation/config.txt. */
1105 return 0;
1106 }
1107
1108 int git_default_config(const char *var, const char *value, void *dummy)
1109 {
1110 if (starts_with(var, "core."))
1111 return git_default_core_config(var, value);
1112
1113 if (starts_with(var, "user."))
1114 return git_ident_config(var, value, dummy);
1115
1116 if (starts_with(var, "i18n."))
1117 return git_default_i18n_config(var, value);
1118
1119 if (starts_with(var, "branch."))
1120 return git_default_branch_config(var, value);
1121
1122 if (starts_with(var, "push."))
1123 return git_default_push_config(var, value);
1124
1125 if (starts_with(var, "mailmap."))
1126 return git_default_mailmap_config(var, value);
1127
1128 if (starts_with(var, "advice."))
1129 return git_default_advice_config(var, value);
1130
1131 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1132 pager_use_color = git_config_bool(var,value);
1133 return 0;
1134 }
1135
1136 if (!strcmp(var, "pack.packsizelimit")) {
1137 pack_size_limit_cfg = git_config_ulong(var, value);
1138 return 0;
1139 }
1140 /* Add other config variables here and to Documentation/config.txt. */
1141 return 0;
1142 }
1143
1144 /*
1145 * All source specific fields in the union, die_on_error, name and the callbacks
1146 * fgetc, ungetc, ftell of top need to be initialized before calling
1147 * this function.
1148 */
1149 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1150 {
1151 int ret;
1152
1153 /* push config-file parsing state stack */
1154 top->prev = cf;
1155 top->linenr = 1;
1156 top->eof = 0;
1157 strbuf_init(&top->value, 1024);
1158 strbuf_init(&top->var, 1024);
1159 cf = top;
1160
1161 ret = git_parse_source(fn, data);
1162
1163 /* pop config-file parsing state stack */
1164 strbuf_release(&top->value);
1165 strbuf_release(&top->var);
1166 cf = top->prev;
1167
1168 return ret;
1169 }
1170
1171 static int do_config_from_file(config_fn_t fn,
1172 const enum config_origin_type origin_type,
1173 const char *name, const char *path, FILE *f,
1174 void *data)
1175 {
1176 struct config_source top;
1177
1178 top.u.file = f;
1179 top.origin_type = origin_type;
1180 top.name = name;
1181 top.path = path;
1182 top.die_on_error = 1;
1183 top.do_fgetc = config_file_fgetc;
1184 top.do_ungetc = config_file_ungetc;
1185 top.do_ftell = config_file_ftell;
1186
1187 return do_config_from(&top, fn, data);
1188 }
1189
1190 static int git_config_from_stdin(config_fn_t fn, void *data)
1191 {
1192 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1193 }
1194
1195 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1196 {
1197 int ret = -1;
1198 FILE *f;
1199
1200 f = fopen(filename, "r");
1201 if (f) {
1202 flockfile(f);
1203 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1204 funlockfile(f);
1205 fclose(f);
1206 }
1207 return ret;
1208 }
1209
1210 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1211 const char *name, const char *buf, size_t len, void *data)
1212 {
1213 struct config_source top;
1214
1215 top.u.buf.buf = buf;
1216 top.u.buf.len = len;
1217 top.u.buf.pos = 0;
1218 top.origin_type = origin_type;
1219 top.name = name;
1220 top.path = NULL;
1221 top.die_on_error = 0;
1222 top.do_fgetc = config_buf_fgetc;
1223 top.do_ungetc = config_buf_ungetc;
1224 top.do_ftell = config_buf_ftell;
1225
1226 return do_config_from(&top, fn, data);
1227 }
1228
1229 static int git_config_from_blob_sha1(config_fn_t fn,
1230 const char *name,
1231 const unsigned char *sha1,
1232 void *data)
1233 {
1234 enum object_type type;
1235 char *buf;
1236 unsigned long size;
1237 int ret;
1238
1239 buf = read_sha1_file(sha1, &type, &size);
1240 if (!buf)
1241 return error("unable to load config blob object '%s'", name);
1242 if (type != OBJ_BLOB) {
1243 free(buf);
1244 return error("reference '%s' does not point to a blob", name);
1245 }
1246
1247 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1248 free(buf);
1249
1250 return ret;
1251 }
1252
1253 static int git_config_from_blob_ref(config_fn_t fn,
1254 const char *name,
1255 void *data)
1256 {
1257 unsigned char sha1[20];
1258
1259 if (get_sha1(name, sha1) < 0)
1260 return error("unable to resolve config blob '%s'", name);
1261 return git_config_from_blob_sha1(fn, name, sha1, data);
1262 }
1263
1264 const char *git_etc_gitconfig(void)
1265 {
1266 static const char *system_wide;
1267 if (!system_wide)
1268 system_wide = system_path(ETC_GITCONFIG);
1269 return system_wide;
1270 }
1271
1272 /*
1273 * Parse environment variable 'k' as a boolean (in various
1274 * possible spellings); if missing, use the default value 'def'.
1275 */
1276 int git_env_bool(const char *k, int def)
1277 {
1278 const char *v = getenv(k);
1279 return v ? git_config_bool(k, v) : def;
1280 }
1281
1282 /*
1283 * Parse environment variable 'k' as ulong with possibly a unit
1284 * suffix; if missing, use the default value 'val'.
1285 */
1286 unsigned long git_env_ulong(const char *k, unsigned long val)
1287 {
1288 const char *v = getenv(k);
1289 if (v && !git_parse_ulong(v, &val))
1290 die("failed to parse %s", k);
1291 return val;
1292 }
1293
1294 int git_config_system(void)
1295 {
1296 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1297 }
1298
1299 static int do_git_config_sequence(config_fn_t fn, void *data)
1300 {
1301 int ret = 0;
1302 char *xdg_config = xdg_config_home("config");
1303 char *user_config = expand_user_path("~/.gitconfig");
1304 char *repo_config = git_pathdup("config");
1305
1306 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1307 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1308 ret += git_config_from_file(fn, git_etc_gitconfig(),
1309 data);
1310
1311 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1312 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1313 ret += git_config_from_file(fn, xdg_config, data);
1314
1315 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1316 ret += git_config_from_file(fn, user_config, data);
1317
1318 current_parsing_scope = CONFIG_SCOPE_REPO;
1319 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1320 ret += git_config_from_file(fn, repo_config, data);
1321
1322 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1323 if (git_config_from_parameters(fn, data) < 0)
1324 die(_("unable to parse command-line config"));
1325
1326 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1327 free(xdg_config);
1328 free(user_config);
1329 free(repo_config);
1330 return ret;
1331 }
1332
1333 int git_config_with_options(config_fn_t fn, void *data,
1334 struct git_config_source *config_source,
1335 int respect_includes)
1336 {
1337 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1338
1339 if (respect_includes) {
1340 inc.fn = fn;
1341 inc.data = data;
1342 fn = git_config_include;
1343 data = &inc;
1344 }
1345
1346 /*
1347 * If we have a specific filename, use it. Otherwise, follow the
1348 * regular lookup sequence.
1349 */
1350 if (config_source && config_source->use_stdin)
1351 return git_config_from_stdin(fn, data);
1352 else if (config_source && config_source->file)
1353 return git_config_from_file(fn, config_source->file, data);
1354 else if (config_source && config_source->blob)
1355 return git_config_from_blob_ref(fn, config_source->blob, data);
1356
1357 return do_git_config_sequence(fn, data);
1358 }
1359
1360 static void git_config_raw(config_fn_t fn, void *data)
1361 {
1362 if (git_config_with_options(fn, data, NULL, 1) < 0)
1363 /*
1364 * git_config_with_options() normally returns only
1365 * zero, as most errors are fatal, and
1366 * non-fatal potential errors are guarded by "if"
1367 * statements that are entered only when no error is
1368 * possible.
1369 *
1370 * If we ever encounter a non-fatal error, it means
1371 * something went really wrong and we should stop
1372 * immediately.
1373 */
1374 die(_("unknown error occurred while reading the configuration files"));
1375 }
1376
1377 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1378 {
1379 int i, value_index;
1380 struct string_list *values;
1381 struct config_set_element *entry;
1382 struct configset_list *list = &cs->list;
1383
1384 for (i = 0; i < list->nr; i++) {
1385 entry = list->items[i].e;
1386 value_index = list->items[i].value_index;
1387 values = &entry->value_list;
1388
1389 current_config_kvi = values->items[value_index].util;
1390
1391 if (fn(entry->key, values->items[value_index].string, data) < 0)
1392 git_die_config_linenr(entry->key,
1393 current_config_kvi->filename,
1394 current_config_kvi->linenr);
1395
1396 current_config_kvi = NULL;
1397 }
1398 }
1399
1400 static void git_config_check_init(void);
1401
1402 void git_config(config_fn_t fn, void *data)
1403 {
1404 git_config_check_init();
1405 configset_iter(&the_config_set, fn, data);
1406 }
1407
1408 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1409 {
1410 struct config_set_element k;
1411 struct config_set_element *found_entry;
1412 char *normalized_key;
1413 /*
1414 * `key` may come from the user, so normalize it before using it
1415 * for querying entries from the hashmap.
1416 */
1417 if (git_config_parse_key(key, &normalized_key, NULL))
1418 return NULL;
1419
1420 hashmap_entry_init(&k, strhash(normalized_key));
1421 k.key = normalized_key;
1422 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1423 free(normalized_key);
1424 return found_entry;
1425 }
1426
1427 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1428 {
1429 struct config_set_element *e;
1430 struct string_list_item *si;
1431 struct configset_list_item *l_item;
1432 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1433
1434 e = configset_find_element(cs, key);
1435 /*
1436 * Since the keys are being fed by git_config*() callback mechanism, they
1437 * are already normalized. So simply add them without any further munging.
1438 */
1439 if (!e) {
1440 e = xmalloc(sizeof(*e));
1441 hashmap_entry_init(e, strhash(key));
1442 e->key = xstrdup(key);
1443 string_list_init(&e->value_list, 1);
1444 hashmap_add(&cs->config_hash, e);
1445 }
1446 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1447
1448 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1449 l_item = &cs->list.items[cs->list.nr++];
1450 l_item->e = e;
1451 l_item->value_index = e->value_list.nr - 1;
1452
1453 if (!cf)
1454 die("BUG: configset_add_value has no source");
1455 if (cf->name) {
1456 kv_info->filename = strintern(cf->name);
1457 kv_info->linenr = cf->linenr;
1458 kv_info->origin_type = cf->origin_type;
1459 } else {
1460 /* for values read from `git_config_from_parameters()` */
1461 kv_info->filename = NULL;
1462 kv_info->linenr = -1;
1463 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1464 }
1465 kv_info->scope = current_parsing_scope;
1466 si->util = kv_info;
1467
1468 return 0;
1469 }
1470
1471 static int config_set_element_cmp(const struct config_set_element *e1,
1472 const struct config_set_element *e2, const void *unused)
1473 {
1474 return strcmp(e1->key, e2->key);
1475 }
1476
1477 void git_configset_init(struct config_set *cs)
1478 {
1479 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1480 cs->hash_initialized = 1;
1481 cs->list.nr = 0;
1482 cs->list.alloc = 0;
1483 cs->list.items = NULL;
1484 }
1485
1486 void git_configset_clear(struct config_set *cs)
1487 {
1488 struct config_set_element *entry;
1489 struct hashmap_iter iter;
1490 if (!cs->hash_initialized)
1491 return;
1492
1493 hashmap_iter_init(&cs->config_hash, &iter);
1494 while ((entry = hashmap_iter_next(&iter))) {
1495 free(entry->key);
1496 string_list_clear(&entry->value_list, 1);
1497 }
1498 hashmap_free(&cs->config_hash, 1);
1499 cs->hash_initialized = 0;
1500 free(cs->list.items);
1501 cs->list.nr = 0;
1502 cs->list.alloc = 0;
1503 cs->list.items = NULL;
1504 }
1505
1506 static int config_set_callback(const char *key, const char *value, void *cb)
1507 {
1508 struct config_set *cs = cb;
1509 configset_add_value(cs, key, value);
1510 return 0;
1511 }
1512
1513 int git_configset_add_file(struct config_set *cs, const char *filename)
1514 {
1515 return git_config_from_file(config_set_callback, filename, cs);
1516 }
1517
1518 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1519 {
1520 const struct string_list *values = NULL;
1521 /*
1522 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1523 * queried key in the files of the configset, the value returned will be the last
1524 * value in the value list for that key.
1525 */
1526 values = git_configset_get_value_multi(cs, key);
1527
1528 if (!values)
1529 return 1;
1530 assert(values->nr > 0);
1531 *value = values->items[values->nr - 1].string;
1532 return 0;
1533 }
1534
1535 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1536 {
1537 struct config_set_element *e = configset_find_element(cs, key);
1538 return e ? &e->value_list : NULL;
1539 }
1540
1541 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1542 {
1543 const char *value;
1544 if (!git_configset_get_value(cs, key, &value))
1545 return git_config_string(dest, key, value);
1546 else
1547 return 1;
1548 }
1549
1550 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1551 {
1552 return git_configset_get_string_const(cs, key, (const char **)dest);
1553 }
1554
1555 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1556 {
1557 const char *value;
1558 if (!git_configset_get_value(cs, key, &value)) {
1559 *dest = git_config_int(key, value);
1560 return 0;
1561 } else
1562 return 1;
1563 }
1564
1565 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1566 {
1567 const char *value;
1568 if (!git_configset_get_value(cs, key, &value)) {
1569 *dest = git_config_ulong(key, value);
1570 return 0;
1571 } else
1572 return 1;
1573 }
1574
1575 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1576 {
1577 const char *value;
1578 if (!git_configset_get_value(cs, key, &value)) {
1579 *dest = git_config_bool(key, value);
1580 return 0;
1581 } else
1582 return 1;
1583 }
1584
1585 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1586 int *is_bool, int *dest)
1587 {
1588 const char *value;
1589 if (!git_configset_get_value(cs, key, &value)) {
1590 *dest = git_config_bool_or_int(key, value, is_bool);
1591 return 0;
1592 } else
1593 return 1;
1594 }
1595
1596 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1597 {
1598 const char *value;
1599 if (!git_configset_get_value(cs, key, &value)) {
1600 *dest = git_config_maybe_bool(key, value);
1601 if (*dest == -1)
1602 return -1;
1603 return 0;
1604 } else
1605 return 1;
1606 }
1607
1608 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1609 {
1610 const char *value;
1611 if (!git_configset_get_value(cs, key, &value))
1612 return git_config_pathname(dest, key, value);
1613 else
1614 return 1;
1615 }
1616
1617 static void git_config_check_init(void)
1618 {
1619 if (the_config_set.hash_initialized)
1620 return;
1621 git_configset_init(&the_config_set);
1622 git_config_raw(config_set_callback, &the_config_set);
1623 }
1624
1625 void git_config_clear(void)
1626 {
1627 if (!the_config_set.hash_initialized)
1628 return;
1629 git_configset_clear(&the_config_set);
1630 }
1631
1632 int git_config_get_value(const char *key, const char **value)
1633 {
1634 git_config_check_init();
1635 return git_configset_get_value(&the_config_set, key, value);
1636 }
1637
1638 const struct string_list *git_config_get_value_multi(const char *key)
1639 {
1640 git_config_check_init();
1641 return git_configset_get_value_multi(&the_config_set, key);
1642 }
1643
1644 int git_config_get_string_const(const char *key, const char **dest)
1645 {
1646 int ret;
1647 git_config_check_init();
1648 ret = git_configset_get_string_const(&the_config_set, key, dest);
1649 if (ret < 0)
1650 git_die_config(key, NULL);
1651 return ret;
1652 }
1653
1654 int git_config_get_string(const char *key, char **dest)
1655 {
1656 git_config_check_init();
1657 return git_config_get_string_const(key, (const char **)dest);
1658 }
1659
1660 int git_config_get_int(const char *key, int *dest)
1661 {
1662 git_config_check_init();
1663 return git_configset_get_int(&the_config_set, key, dest);
1664 }
1665
1666 int git_config_get_ulong(const char *key, unsigned long *dest)
1667 {
1668 git_config_check_init();
1669 return git_configset_get_ulong(&the_config_set, key, dest);
1670 }
1671
1672 int git_config_get_bool(const char *key, int *dest)
1673 {
1674 git_config_check_init();
1675 return git_configset_get_bool(&the_config_set, key, dest);
1676 }
1677
1678 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1679 {
1680 git_config_check_init();
1681 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1682 }
1683
1684 int git_config_get_maybe_bool(const char *key, int *dest)
1685 {
1686 git_config_check_init();
1687 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1688 }
1689
1690 int git_config_get_pathname(const char *key, const char **dest)
1691 {
1692 int ret;
1693 git_config_check_init();
1694 ret = git_configset_get_pathname(&the_config_set, key, dest);
1695 if (ret < 0)
1696 git_die_config(key, NULL);
1697 return ret;
1698 }
1699
1700 int git_config_get_untracked_cache(void)
1701 {
1702 int val = -1;
1703 const char *v;
1704
1705 /* Hack for test programs like test-dump-untracked-cache */
1706 if (ignore_untracked_cache_config)
1707 return -1;
1708
1709 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1710 return val;
1711
1712 if (!git_config_get_value("core.untrackedcache", &v)) {
1713 if (!strcasecmp(v, "keep"))
1714 return -1;
1715
1716 error("unknown core.untrackedCache value '%s'; "
1717 "using 'keep' default value", v);
1718 return -1;
1719 }
1720
1721 return -1; /* default value */
1722 }
1723
1724 NORETURN
1725 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1726 {
1727 if (!filename)
1728 die(_("unable to parse '%s' from command-line config"), key);
1729 else
1730 die(_("bad config variable '%s' in file '%s' at line %d"),
1731 key, filename, linenr);
1732 }
1733
1734 NORETURN __attribute__((format(printf, 2, 3)))
1735 void git_die_config(const char *key, const char *err, ...)
1736 {
1737 const struct string_list *values;
1738 struct key_value_info *kv_info;
1739
1740 if (err) {
1741 va_list params;
1742 va_start(params, err);
1743 vreportf("error: ", err, params);
1744 va_end(params);
1745 }
1746 values = git_config_get_value_multi(key);
1747 kv_info = values->items[values->nr - 1].util;
1748 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1749 }
1750
1751 /*
1752 * Find all the stuff for git_config_set() below.
1753 */
1754
1755 static struct {
1756 int baselen;
1757 char *key;
1758 int do_not_match;
1759 regex_t *value_regex;
1760 int multi_replace;
1761 size_t *offset;
1762 unsigned int offset_alloc;
1763 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1764 int seen;
1765 } store;
1766
1767 static int matches(const char *key, const char *value)
1768 {
1769 if (strcmp(key, store.key))
1770 return 0; /* not ours */
1771 if (!store.value_regex)
1772 return 1; /* always matches */
1773 if (store.value_regex == CONFIG_REGEX_NONE)
1774 return 0; /* never matches */
1775
1776 return store.do_not_match ^
1777 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1778 }
1779
1780 static int store_aux(const char *key, const char *value, void *cb)
1781 {
1782 const char *ep;
1783 size_t section_len;
1784
1785 switch (store.state) {
1786 case KEY_SEEN:
1787 if (matches(key, value)) {
1788 if (store.seen == 1 && store.multi_replace == 0) {
1789 warning(_("%s has multiple values"), key);
1790 }
1791
1792 ALLOC_GROW(store.offset, store.seen + 1,
1793 store.offset_alloc);
1794
1795 store.offset[store.seen] = cf->do_ftell(cf);
1796 store.seen++;
1797 }
1798 break;
1799 case SECTION_SEEN:
1800 /*
1801 * What we are looking for is in store.key (both
1802 * section and var), and its section part is baselen
1803 * long. We found key (again, both section and var).
1804 * We would want to know if this key is in the same
1805 * section as what we are looking for. We already
1806 * know we are in the same section as what should
1807 * hold store.key.
1808 */
1809 ep = strrchr(key, '.');
1810 section_len = ep - key;
1811
1812 if ((section_len != store.baselen) ||
1813 memcmp(key, store.key, section_len+1)) {
1814 store.state = SECTION_END_SEEN;
1815 break;
1816 }
1817
1818 /*
1819 * Do not increment matches: this is no match, but we
1820 * just made sure we are in the desired section.
1821 */
1822 ALLOC_GROW(store.offset, store.seen + 1,
1823 store.offset_alloc);
1824 store.offset[store.seen] = cf->do_ftell(cf);
1825 /* fallthru */
1826 case SECTION_END_SEEN:
1827 case START:
1828 if (matches(key, value)) {
1829 ALLOC_GROW(store.offset, store.seen + 1,
1830 store.offset_alloc);
1831 store.offset[store.seen] = cf->do_ftell(cf);
1832 store.state = KEY_SEEN;
1833 store.seen++;
1834 } else {
1835 if (strrchr(key, '.') - key == store.baselen &&
1836 !strncmp(key, store.key, store.baselen)) {
1837 store.state = SECTION_SEEN;
1838 ALLOC_GROW(store.offset,
1839 store.seen + 1,
1840 store.offset_alloc);
1841 store.offset[store.seen] = cf->do_ftell(cf);
1842 }
1843 }
1844 }
1845 return 0;
1846 }
1847
1848 static int write_error(const char *filename)
1849 {
1850 error("failed to write new configuration file %s", filename);
1851
1852 /* Same error code as "failed to rename". */
1853 return 4;
1854 }
1855
1856 static int store_write_section(int fd, const char *key)
1857 {
1858 const char *dot;
1859 int i, success;
1860 struct strbuf sb = STRBUF_INIT;
1861
1862 dot = memchr(key, '.', store.baselen);
1863 if (dot) {
1864 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1865 for (i = dot - key + 1; i < store.baselen; i++) {
1866 if (key[i] == '"' || key[i] == '\\')
1867 strbuf_addch(&sb, '\\');
1868 strbuf_addch(&sb, key[i]);
1869 }
1870 strbuf_addstr(&sb, "\"]\n");
1871 } else {
1872 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1873 }
1874
1875 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1876 strbuf_release(&sb);
1877
1878 return success;
1879 }
1880
1881 static int store_write_pair(int fd, const char *key, const char *value)
1882 {
1883 int i, success;
1884 int length = strlen(key + store.baselen + 1);
1885 const char *quote = "";
1886 struct strbuf sb = STRBUF_INIT;
1887
1888 /*
1889 * Check to see if the value needs to be surrounded with a dq pair.
1890 * Note that problematic characters are always backslash-quoted; this
1891 * check is about not losing leading or trailing SP and strings that
1892 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1893 * configuration parser.
1894 */
1895 if (value[0] == ' ')
1896 quote = "\"";
1897 for (i = 0; value[i]; i++)
1898 if (value[i] == ';' || value[i] == '#')
1899 quote = "\"";
1900 if (i && value[i - 1] == ' ')
1901 quote = "\"";
1902
1903 strbuf_addf(&sb, "\t%.*s = %s",
1904 length, key + store.baselen + 1, quote);
1905
1906 for (i = 0; value[i]; i++)
1907 switch (value[i]) {
1908 case '\n':
1909 strbuf_addstr(&sb, "\\n");
1910 break;
1911 case '\t':
1912 strbuf_addstr(&sb, "\\t");
1913 break;
1914 case '"':
1915 case '\\':
1916 strbuf_addch(&sb, '\\');
1917 default:
1918 strbuf_addch(&sb, value[i]);
1919 break;
1920 }
1921 strbuf_addf(&sb, "%s\n", quote);
1922
1923 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1924 strbuf_release(&sb);
1925
1926 return success;
1927 }
1928
1929 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1930 size_t offset_, int *found_bracket)
1931 {
1932 size_t equal_offset = size, bracket_offset = size;
1933 ssize_t offset;
1934
1935 contline:
1936 for (offset = offset_-2; offset > 0
1937 && contents[offset] != '\n'; offset--)
1938 switch (contents[offset]) {
1939 case '=': equal_offset = offset; break;
1940 case ']': bracket_offset = offset; break;
1941 }
1942 if (offset > 0 && contents[offset-1] == '\\') {
1943 offset_ = offset;
1944 goto contline;
1945 }
1946 if (bracket_offset < equal_offset) {
1947 *found_bracket = 1;
1948 offset = bracket_offset+1;
1949 } else
1950 offset++;
1951
1952 return offset;
1953 }
1954
1955 int git_config_set_in_file_gently(const char *config_filename,
1956 const char *key, const char *value)
1957 {
1958 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
1959 }
1960
1961 void git_config_set_in_file(const char *config_filename,
1962 const char *key, const char *value)
1963 {
1964 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1965 }
1966
1967 int git_config_set_gently(const char *key, const char *value)
1968 {
1969 return git_config_set_multivar_gently(key, value, NULL, 0);
1970 }
1971
1972 void git_config_set(const char *key, const char *value)
1973 {
1974 git_config_set_multivar(key, value, NULL, 0);
1975 }
1976
1977 /*
1978 * Auxiliary function to sanity-check and split the key into the section
1979 * identifier and variable name.
1980 *
1981 * Returns 0 on success, -1 when there is an invalid character in the key and
1982 * -2 if there is no section name in the key.
1983 *
1984 * store_key - pointer to char* which will hold a copy of the key with
1985 * lowercase section and variable name
1986 * baselen - pointer to int which will hold the length of the
1987 * section + subsection part, can be NULL
1988 */
1989 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
1990 {
1991 int i, dot, baselen;
1992 const char *last_dot = strrchr(key, '.');
1993
1994 /*
1995 * Since "key" actually contains the section name and the real
1996 * key name separated by a dot, we have to know where the dot is.
1997 */
1998
1999 if (last_dot == NULL || last_dot == key) {
2000 if (!quiet)
2001 error("key does not contain a section: %s", key);
2002 return -CONFIG_NO_SECTION_OR_NAME;
2003 }
2004
2005 if (!last_dot[1]) {
2006 if (!quiet)
2007 error("key does not contain variable name: %s", key);
2008 return -CONFIG_NO_SECTION_OR_NAME;
2009 }
2010
2011 baselen = last_dot - key;
2012 if (baselen_)
2013 *baselen_ = baselen;
2014
2015 /*
2016 * Validate the key and while at it, lower case it for matching.
2017 */
2018 if (store_key)
2019 *store_key = xmallocz(strlen(key));
2020
2021 dot = 0;
2022 for (i = 0; key[i]; i++) {
2023 unsigned char c = key[i];
2024 if (c == '.')
2025 dot = 1;
2026 /* Leave the extended basename untouched.. */
2027 if (!dot || i > baselen) {
2028 if (!iskeychar(c) ||
2029 (i == baselen + 1 && !isalpha(c))) {
2030 if (!quiet)
2031 error("invalid key: %s", key);
2032 goto out_free_ret_1;
2033 }
2034 c = tolower(c);
2035 } else if (c == '\n') {
2036 if (!quiet)
2037 error("invalid key (newline): %s", key);
2038 goto out_free_ret_1;
2039 }
2040 if (store_key)
2041 (*store_key)[i] = c;
2042 }
2043
2044 return 0;
2045
2046 out_free_ret_1:
2047 if (store_key) {
2048 free(*store_key);
2049 *store_key = NULL;
2050 }
2051 return -CONFIG_INVALID_KEY;
2052 }
2053
2054 int git_config_parse_key(const char *key, char **store_key, int *baselen)
2055 {
2056 return git_config_parse_key_1(key, store_key, baselen, 0);
2057 }
2058
2059 int git_config_key_is_valid(const char *key)
2060 {
2061 return !git_config_parse_key_1(key, NULL, NULL, 1);
2062 }
2063
2064 /*
2065 * If value==NULL, unset in (remove from) config,
2066 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2067 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2068 * (only add a new one)
2069 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2070 * else all matching key/values (regardless how many) are removed,
2071 * before the new pair is written.
2072 *
2073 * Returns 0 on success.
2074 *
2075 * This function does this:
2076 *
2077 * - it locks the config file by creating ".git/config.lock"
2078 *
2079 * - it then parses the config using store_aux() as validator to find
2080 * the position on the key/value pair to replace. If it is to be unset,
2081 * it must be found exactly once.
2082 *
2083 * - the config file is mmap()ed and the part before the match (if any) is
2084 * written to the lock file, then the changed part and the rest.
2085 *
2086 * - the config file is removed and the lock file rename()d to it.
2087 *
2088 */
2089 int git_config_set_multivar_in_file_gently(const char *config_filename,
2090 const char *key, const char *value,
2091 const char *value_regex,
2092 int multi_replace)
2093 {
2094 int fd = -1, in_fd = -1;
2095 int ret;
2096 struct lock_file *lock = NULL;
2097 char *filename_buf = NULL;
2098 char *contents = NULL;
2099 size_t contents_sz;
2100
2101 /* parse-key returns negative; flip the sign to feed exit(3) */
2102 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2103 if (ret)
2104 goto out_free;
2105
2106 store.multi_replace = multi_replace;
2107
2108 if (!config_filename)
2109 config_filename = filename_buf = git_pathdup("config");
2110
2111 /*
2112 * The lock serves a purpose in addition to locking: the new
2113 * contents of .git/config will be written into it.
2114 */
2115 lock = xcalloc(1, sizeof(struct lock_file));
2116 fd = hold_lock_file_for_update(lock, config_filename, 0);
2117 if (fd < 0) {
2118 error_errno("could not lock config file %s", config_filename);
2119 free(store.key);
2120 ret = CONFIG_NO_LOCK;
2121 goto out_free;
2122 }
2123
2124 /*
2125 * If .git/config does not exist yet, write a minimal version.
2126 */
2127 in_fd = open(config_filename, O_RDONLY);
2128 if ( in_fd < 0 ) {
2129 free(store.key);
2130
2131 if ( ENOENT != errno ) {
2132 error_errno("opening %s", config_filename);
2133 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2134 goto out_free;
2135 }
2136 /* if nothing to unset, error out */
2137 if (value == NULL) {
2138 ret = CONFIG_NOTHING_SET;
2139 goto out_free;
2140 }
2141
2142 store.key = (char *)key;
2143 if (!store_write_section(fd, key) ||
2144 !store_write_pair(fd, key, value))
2145 goto write_err_out;
2146 } else {
2147 struct stat st;
2148 size_t copy_begin, copy_end;
2149 int i, new_line = 0;
2150
2151 if (value_regex == NULL)
2152 store.value_regex = NULL;
2153 else if (value_regex == CONFIG_REGEX_NONE)
2154 store.value_regex = CONFIG_REGEX_NONE;
2155 else {
2156 if (value_regex[0] == '!') {
2157 store.do_not_match = 1;
2158 value_regex++;
2159 } else
2160 store.do_not_match = 0;
2161
2162 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2163 if (regcomp(store.value_regex, value_regex,
2164 REG_EXTENDED)) {
2165 error("invalid pattern: %s", value_regex);
2166 free(store.value_regex);
2167 ret = CONFIG_INVALID_PATTERN;
2168 goto out_free;
2169 }
2170 }
2171
2172 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2173 store.offset[0] = 0;
2174 store.state = START;
2175 store.seen = 0;
2176
2177 /*
2178 * After this, store.offset will contain the *end* offset
2179 * of the last match, or remain at 0 if no match was found.
2180 * As a side effect, we make sure to transform only a valid
2181 * existing config file.
2182 */
2183 if (git_config_from_file(store_aux, config_filename, NULL)) {
2184 error("invalid config file %s", config_filename);
2185 free(store.key);
2186 if (store.value_regex != NULL &&
2187 store.value_regex != CONFIG_REGEX_NONE) {
2188 regfree(store.value_regex);
2189 free(store.value_regex);
2190 }
2191 ret = CONFIG_INVALID_FILE;
2192 goto out_free;
2193 }
2194
2195 free(store.key);
2196 if (store.value_regex != NULL &&
2197 store.value_regex != CONFIG_REGEX_NONE) {
2198 regfree(store.value_regex);
2199 free(store.value_regex);
2200 }
2201
2202 /* if nothing to unset, or too many matches, error out */
2203 if ((store.seen == 0 && value == NULL) ||
2204 (store.seen > 1 && multi_replace == 0)) {
2205 ret = CONFIG_NOTHING_SET;
2206 goto out_free;
2207 }
2208
2209 fstat(in_fd, &st);
2210 contents_sz = xsize_t(st.st_size);
2211 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2212 MAP_PRIVATE, in_fd, 0);
2213 if (contents == MAP_FAILED) {
2214 if (errno == ENODEV && S_ISDIR(st.st_mode))
2215 errno = EISDIR;
2216 error_errno("unable to mmap '%s'", config_filename);
2217 ret = CONFIG_INVALID_FILE;
2218 contents = NULL;
2219 goto out_free;
2220 }
2221 close(in_fd);
2222 in_fd = -1;
2223
2224 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2225 error_errno("chmod on %s failed", get_lock_file_path(lock));
2226 ret = CONFIG_NO_WRITE;
2227 goto out_free;
2228 }
2229
2230 if (store.seen == 0)
2231 store.seen = 1;
2232
2233 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2234 if (store.offset[i] == 0) {
2235 store.offset[i] = copy_end = contents_sz;
2236 } else if (store.state != KEY_SEEN) {
2237 copy_end = store.offset[i];
2238 } else
2239 copy_end = find_beginning_of_line(
2240 contents, contents_sz,
2241 store.offset[i]-2, &new_line);
2242
2243 if (copy_end > 0 && contents[copy_end-1] != '\n')
2244 new_line = 1;
2245
2246 /* write the first part of the config */
2247 if (copy_end > copy_begin) {
2248 if (write_in_full(fd, contents + copy_begin,
2249 copy_end - copy_begin) <
2250 copy_end - copy_begin)
2251 goto write_err_out;
2252 if (new_line &&
2253 write_str_in_full(fd, "\n") != 1)
2254 goto write_err_out;
2255 }
2256 copy_begin = store.offset[i];
2257 }
2258
2259 /* write the pair (value == NULL means unset) */
2260 if (value != NULL) {
2261 if (store.state == START) {
2262 if (!store_write_section(fd, key))
2263 goto write_err_out;
2264 }
2265 if (!store_write_pair(fd, key, value))
2266 goto write_err_out;
2267 }
2268
2269 /* write the rest of the config */
2270 if (copy_begin < contents_sz)
2271 if (write_in_full(fd, contents + copy_begin,
2272 contents_sz - copy_begin) <
2273 contents_sz - copy_begin)
2274 goto write_err_out;
2275
2276 munmap(contents, contents_sz);
2277 contents = NULL;
2278 }
2279
2280 if (commit_lock_file(lock) < 0) {
2281 error_errno("could not write config file %s", config_filename);
2282 ret = CONFIG_NO_WRITE;
2283 lock = NULL;
2284 goto out_free;
2285 }
2286
2287 /*
2288 * lock is committed, so don't try to roll it back below.
2289 * NOTE: Since lockfile.c keeps a linked list of all created
2290 * lock_file structures, it isn't safe to free(lock). It's
2291 * better to just leave it hanging around.
2292 */
2293 lock = NULL;
2294 ret = 0;
2295
2296 /* Invalidate the config cache */
2297 git_config_clear();
2298
2299 out_free:
2300 if (lock)
2301 rollback_lock_file(lock);
2302 free(filename_buf);
2303 if (contents)
2304 munmap(contents, contents_sz);
2305 if (in_fd >= 0)
2306 close(in_fd);
2307 return ret;
2308
2309 write_err_out:
2310 ret = write_error(get_lock_file_path(lock));
2311 goto out_free;
2312
2313 }
2314
2315 void git_config_set_multivar_in_file(const char *config_filename,
2316 const char *key, const char *value,
2317 const char *value_regex, int multi_replace)
2318 {
2319 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2320 value_regex, multi_replace))
2321 return;
2322 if (value)
2323 die(_("could not set '%s' to '%s'"), key, value);
2324 else
2325 die(_("could not unset '%s'"), key);
2326 }
2327
2328 int git_config_set_multivar_gently(const char *key, const char *value,
2329 const char *value_regex, int multi_replace)
2330 {
2331 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2332 multi_replace);
2333 }
2334
2335 void git_config_set_multivar(const char *key, const char *value,
2336 const char *value_regex, int multi_replace)
2337 {
2338 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2339 multi_replace);
2340 }
2341
2342 static int section_name_match (const char *buf, const char *name)
2343 {
2344 int i = 0, j = 0, dot = 0;
2345 if (buf[i] != '[')
2346 return 0;
2347 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2348 if (!dot && isspace(buf[i])) {
2349 dot = 1;
2350 if (name[j++] != '.')
2351 break;
2352 for (i++; isspace(buf[i]); i++)
2353 ; /* do nothing */
2354 if (buf[i] != '"')
2355 break;
2356 continue;
2357 }
2358 if (buf[i] == '\\' && dot)
2359 i++;
2360 else if (buf[i] == '"' && dot) {
2361 for (i++; isspace(buf[i]); i++)
2362 ; /* do_nothing */
2363 break;
2364 }
2365 if (buf[i] != name[j++])
2366 break;
2367 }
2368 if (buf[i] == ']' && name[j] == 0) {
2369 /*
2370 * We match, now just find the right length offset by
2371 * gobbling up any whitespace after it, as well
2372 */
2373 i++;
2374 for (; buf[i] && isspace(buf[i]); i++)
2375 ; /* do nothing */
2376 return i;
2377 }
2378 return 0;
2379 }
2380
2381 static int section_name_is_ok(const char *name)
2382 {
2383 /* Empty section names are bogus. */
2384 if (!*name)
2385 return 0;
2386
2387 /*
2388 * Before a dot, we must be alphanumeric or dash. After the first dot,
2389 * anything goes, so we can stop checking.
2390 */
2391 for (; *name && *name != '.'; name++)
2392 if (*name != '-' && !isalnum(*name))
2393 return 0;
2394 return 1;
2395 }
2396
2397 /* if new_name == NULL, the section is removed instead */
2398 int git_config_rename_section_in_file(const char *config_filename,
2399 const char *old_name, const char *new_name)
2400 {
2401 int ret = 0, remove = 0;
2402 char *filename_buf = NULL;
2403 struct lock_file *lock;
2404 int out_fd;
2405 char buf[1024];
2406 FILE *config_file;
2407 struct stat st;
2408
2409 if (new_name && !section_name_is_ok(new_name)) {
2410 ret = error("invalid section name: %s", new_name);
2411 goto out;
2412 }
2413
2414 if (!config_filename)
2415 config_filename = filename_buf = git_pathdup("config");
2416
2417 lock = xcalloc(1, sizeof(struct lock_file));
2418 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2419 if (out_fd < 0) {
2420 ret = error("could not lock config file %s", config_filename);
2421 goto out;
2422 }
2423
2424 if (!(config_file = fopen(config_filename, "rb"))) {
2425 /* no config file means nothing to rename, no error */
2426 goto unlock_and_out;
2427 }
2428
2429 fstat(fileno(config_file), &st);
2430
2431 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2432 ret = error_errno("chmod on %s failed",
2433 get_lock_file_path(lock));
2434 goto out;
2435 }
2436
2437 while (fgets(buf, sizeof(buf), config_file)) {
2438 int i;
2439 int length;
2440 char *output = buf;
2441 for (i = 0; buf[i] && isspace(buf[i]); i++)
2442 ; /* do nothing */
2443 if (buf[i] == '[') {
2444 /* it's a section */
2445 int offset = section_name_match(&buf[i], old_name);
2446 if (offset > 0) {
2447 ret++;
2448 if (new_name == NULL) {
2449 remove = 1;
2450 continue;
2451 }
2452 store.baselen = strlen(new_name);
2453 if (!store_write_section(out_fd, new_name)) {
2454 ret = write_error(get_lock_file_path(lock));
2455 goto out;
2456 }
2457 /*
2458 * We wrote out the new section, with
2459 * a newline, now skip the old
2460 * section's length
2461 */
2462 output += offset + i;
2463 if (strlen(output) > 0) {
2464 /*
2465 * More content means there's
2466 * a declaration to put on the
2467 * next line; indent with a
2468 * tab
2469 */
2470 output -= 1;
2471 output[0] = '\t';
2472 }
2473 }
2474 remove = 0;
2475 }
2476 if (remove)
2477 continue;
2478 length = strlen(output);
2479 if (write_in_full(out_fd, output, length) != length) {
2480 ret = write_error(get_lock_file_path(lock));
2481 goto out;
2482 }
2483 }
2484 fclose(config_file);
2485 unlock_and_out:
2486 if (commit_lock_file(lock) < 0)
2487 ret = error_errno("could not write config file %s",
2488 config_filename);
2489 out:
2490 free(filename_buf);
2491 return ret;
2492 }
2493
2494 int git_config_rename_section(const char *old_name, const char *new_name)
2495 {
2496 return git_config_rename_section_in_file(NULL, old_name, new_name);
2497 }
2498
2499 /*
2500 * Call this to report error for your variable that should not
2501 * get a boolean value (i.e. "[my] var" means "true").
2502 */
2503 #undef config_error_nonbool
2504 int config_error_nonbool(const char *var)
2505 {
2506 return error("missing value for '%s'", var);
2507 }
2508
2509 int parse_config_key(const char *var,
2510 const char *section,
2511 const char **subsection, int *subsection_len,
2512 const char **key)
2513 {
2514 int section_len = strlen(section);
2515 const char *dot;
2516
2517 /* Does it start with "section." ? */
2518 if (!starts_with(var, section) || var[section_len] != '.')
2519 return -1;
2520
2521 /*
2522 * Find the key; we don't know yet if we have a subsection, but we must
2523 * parse backwards from the end, since the subsection may have dots in
2524 * it, too.
2525 */
2526 dot = strrchr(var, '.');
2527 *key = dot + 1;
2528
2529 /* Did we have a subsection at all? */
2530 if (dot == var + section_len) {
2531 *subsection = NULL;
2532 *subsection_len = 0;
2533 }
2534 else {
2535 *subsection = var + section_len + 1;
2536 *subsection_len = dot - *subsection;
2537 }
2538
2539 return 0;
2540 }
2541
2542 const char *current_config_origin_type(void)
2543 {
2544 int type;
2545 if (current_config_kvi)
2546 type = current_config_kvi->origin_type;
2547 else if(cf)
2548 type = cf->origin_type;
2549 else
2550 die("BUG: current_config_origin_type called outside config callback");
2551
2552 switch (type) {
2553 case CONFIG_ORIGIN_BLOB:
2554 return "blob";
2555 case CONFIG_ORIGIN_FILE:
2556 return "file";
2557 case CONFIG_ORIGIN_STDIN:
2558 return "standard input";
2559 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2560 return "submodule-blob";
2561 case CONFIG_ORIGIN_CMDLINE:
2562 return "command line";
2563 default:
2564 die("BUG: unknown config origin type");
2565 }
2566 }
2567
2568 const char *current_config_name(void)
2569 {
2570 const char *name;
2571 if (current_config_kvi)
2572 name = current_config_kvi->filename;
2573 else if (cf)
2574 name = cf->name;
2575 else
2576 die("BUG: current_config_name called outside config callback");
2577 return name ? name : "";
2578 }
2579
2580 enum config_scope current_config_scope(void)
2581 {
2582 if (current_config_kvi)
2583 return current_config_kvi->scope;
2584 else
2585 return current_parsing_scope;
2586 }
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