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type_from_string_gently: make sure length matches
[git/git-svn.git] / config.c
blob01e0bdbafd4d43a7fb983449c78d711d22dd2375
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 "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
12 #include "hashmap.h"
13 #include "string-list.h"
14
15 struct config_source {
16 struct config_source *prev;
17 union {
18 FILE *file;
19 struct config_buf {
20 const char *buf;
21 size_t len;
22 size_t pos;
23 } buf;
24 } u;
25 const char *name;
26 const char *path;
27 int die_on_error;
28 int linenr;
29 int eof;
30 struct strbuf value;
31 struct strbuf var;
32
33 int (*do_fgetc)(struct config_source *c);
34 int (*do_ungetc)(int c, struct config_source *conf);
35 long (*do_ftell)(struct config_source *c);
36 };
37
38 struct config_set_element {
39 struct hashmap_entry ent;
40 char *key;
41 struct string_list value_list;
42 };
43
44 static struct config_source *cf;
45
46 static int zlib_compression_seen;
47
48 /*
49 * Default config_set that contains key-value pairs from the usual set of config
50 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
51 * config file and the global /etc/gitconfig)
52 */
53 static struct config_set the_config_set;
54
55 static int config_file_fgetc(struct config_source *conf)
56 {
57 return fgetc(conf->u.file);
58 }
59
60 static int config_file_ungetc(int c, struct config_source *conf)
61 {
62 return ungetc(c, conf->u.file);
63 }
64
65 static long config_file_ftell(struct config_source *conf)
66 {
67 return ftell(conf->u.file);
68 }
69
70
71 static int config_buf_fgetc(struct config_source *conf)
72 {
73 if (conf->u.buf.pos < conf->u.buf.len)
74 return conf->u.buf.buf[conf->u.buf.pos++];
75
76 return EOF;
77 }
78
79 static int config_buf_ungetc(int c, struct config_source *conf)
80 {
81 if (conf->u.buf.pos > 0)
82 return conf->u.buf.buf[--conf->u.buf.pos];
83
84 return EOF;
85 }
86
87 static long config_buf_ftell(struct config_source *conf)
88 {
89 return conf->u.buf.pos;
90 }
91
92 #define MAX_INCLUDE_DEPTH 10
93 static const char include_depth_advice[] =
94 "exceeded maximum include depth (%d) while including\n"
95 " %s\n"
96 "from\n"
97 " %s\n"
98 "Do you have circular includes?";
99 static int handle_path_include(const char *path, struct config_include_data *inc)
100 {
101 int ret = 0;
102 struct strbuf buf = STRBUF_INIT;
103 char *expanded;
104
105 if (!path)
106 return config_error_nonbool("include.path");
107
108 expanded = expand_user_path(path);
109 if (!expanded)
110 return error("Could not expand include path '%s'", path);
111 path = expanded;
112
113 /*
114 * Use an absolute path as-is, but interpret relative paths
115 * based on the including config file.
116 */
117 if (!is_absolute_path(path)) {
118 char *slash;
119
120 if (!cf || !cf->path)
121 return error("relative config includes must come from files");
122
123 slash = find_last_dir_sep(cf->path);
124 if (slash)
125 strbuf_add(&buf, cf->path, slash - cf->path + 1);
126 strbuf_addstr(&buf, path);
127 path = buf.buf;
128 }
129
130 if (!access_or_die(path, R_OK, 0)) {
131 if (++inc->depth > MAX_INCLUDE_DEPTH)
132 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
133 cf && cf->name ? cf->name : "the command line");
134 ret = git_config_from_file(git_config_include, path, inc);
135 inc->depth--;
136 }
137 strbuf_release(&buf);
138 free(expanded);
139 return ret;
140 }
141
142 int git_config_include(const char *var, const char *value, void *data)
143 {
144 struct config_include_data *inc = data;
145 const char *type;
146 int ret;
147
148 /*
149 * Pass along all values, including "include" directives; this makes it
150 * possible to query information on the includes themselves.
151 */
152 ret = inc->fn(var, value, inc->data);
153 if (ret < 0)
154 return ret;
155
156 if (!skip_prefix(var, "include.", &type))
157 return ret;
158
159 if (!strcmp(type, "path"))
160 ret = handle_path_include(value, inc);
161 return ret;
162 }
163
164 void git_config_push_parameter(const char *text)
165 {
166 struct strbuf env = STRBUF_INIT;
167 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
168 if (old) {
169 strbuf_addstr(&env, old);
170 strbuf_addch(&env, ' ');
171 }
172 sq_quote_buf(&env, text);
173 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
174 strbuf_release(&env);
175 }
176
177 int git_config_parse_parameter(const char *text,
178 config_fn_t fn, void *data)
179 {
180 const char *value;
181 struct strbuf **pair;
182
183 pair = strbuf_split_str(text, '=', 2);
184 if (!pair[0])
185 return error("bogus config parameter: %s", text);
186
187 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
188 strbuf_setlen(pair[0], pair[0]->len - 1);
189 value = pair[1] ? pair[1]->buf : "";
190 } else {
191 value = NULL;
192 }
193
194 strbuf_trim(pair[0]);
195 if (!pair[0]->len) {
196 strbuf_list_free(pair);
197 return error("bogus config parameter: %s", text);
198 }
199 strbuf_tolower(pair[0]);
200 if (fn(pair[0]->buf, value, data) < 0) {
201 strbuf_list_free(pair);
202 return -1;
203 }
204 strbuf_list_free(pair);
205 return 0;
206 }
207
208 int git_config_from_parameters(config_fn_t fn, void *data)
209 {
210 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
211 char *envw;
212 const char **argv = NULL;
213 int nr = 0, alloc = 0;
214 int i;
215
216 if (!env)
217 return 0;
218 /* sq_dequote will write over it */
219 envw = xstrdup(env);
220
221 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
222 free(envw);
223 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
224 }
225
226 for (i = 0; i < nr; i++) {
227 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
228 free(argv);
229 free(envw);
230 return -1;
231 }
232 }
233
234 free(argv);
235 free(envw);
236 return nr > 0;
237 }
238
239 static int get_next_char(void)
240 {
241 int c = cf->do_fgetc(cf);
242
243 if (c == '\r') {
244 /* DOS like systems */
245 c = cf->do_fgetc(cf);
246 if (c != '\n') {
247 cf->do_ungetc(c, cf);
248 c = '\r';
249 }
250 }
251 if (c == '\n')
252 cf->linenr++;
253 if (c == EOF) {
254 cf->eof = 1;
255 c = '\n';
256 }
257 return c;
258 }
259
260 static char *parse_value(void)
261 {
262 int quote = 0, comment = 0, space = 0;
263
264 strbuf_reset(&cf->value);
265 for (;;) {
266 int c = get_next_char();
267 if (c == '\n') {
268 if (quote) {
269 cf->linenr--;
270 return NULL;
271 }
272 return cf->value.buf;
273 }
274 if (comment)
275 continue;
276 if (isspace(c) && !quote) {
277 if (cf->value.len)
278 space++;
279 continue;
280 }
281 if (!quote) {
282 if (c == ';' || c == '#') {
283 comment = 1;
284 continue;
285 }
286 }
287 for (; space; space--)
288 strbuf_addch(&cf->value, ' ');
289 if (c == '\\') {
290 c = get_next_char();
291 switch (c) {
292 case '\n':
293 continue;
294 case 't':
295 c = '\t';
296 break;
297 case 'b':
298 c = '\b';
299 break;
300 case 'n':
301 c = '\n';
302 break;
303 /* Some characters escape as themselves */
304 case '\\': case '"':
305 break;
306 /* Reject unknown escape sequences */
307 default:
308 return NULL;
309 }
310 strbuf_addch(&cf->value, c);
311 continue;
312 }
313 if (c == '"') {
314 quote = 1-quote;
315 continue;
316 }
317 strbuf_addch(&cf->value, c);
318 }
319 }
320
321 static inline int iskeychar(int c)
322 {
323 return isalnum(c) || c == '-';
324 }
325
326 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
327 {
328 int c;
329 char *value;
330
331 /* Get the full name */
332 for (;;) {
333 c = get_next_char();
334 if (cf->eof)
335 break;
336 if (!iskeychar(c))
337 break;
338 strbuf_addch(name, tolower(c));
339 }
340
341 while (c == ' ' || c == '\t')
342 c = get_next_char();
343
344 value = NULL;
345 if (c != '\n') {
346 if (c != '=')
347 return -1;
348 value = parse_value();
349 if (!value)
350 return -1;
351 }
352 return fn(name->buf, value, data);
353 }
354
355 static int get_extended_base_var(struct strbuf *name, int c)
356 {
357 do {
358 if (c == '\n')
359 goto error_incomplete_line;
360 c = get_next_char();
361 } while (isspace(c));
362
363 /* We require the format to be '[base "extension"]' */
364 if (c != '"')
365 return -1;
366 strbuf_addch(name, '.');
367
368 for (;;) {
369 int c = get_next_char();
370 if (c == '\n')
371 goto error_incomplete_line;
372 if (c == '"')
373 break;
374 if (c == '\\') {
375 c = get_next_char();
376 if (c == '\n')
377 goto error_incomplete_line;
378 }
379 strbuf_addch(name, c);
380 }
381
382 /* Final ']' */
383 if (get_next_char() != ']')
384 return -1;
385 return 0;
386 error_incomplete_line:
387 cf->linenr--;
388 return -1;
389 }
390
391 static int get_base_var(struct strbuf *name)
392 {
393 for (;;) {
394 int c = get_next_char();
395 if (cf->eof)
396 return -1;
397 if (c == ']')
398 return 0;
399 if (isspace(c))
400 return get_extended_base_var(name, c);
401 if (!iskeychar(c) && c != '.')
402 return -1;
403 strbuf_addch(name, tolower(c));
404 }
405 }
406
407 static int git_parse_source(config_fn_t fn, void *data)
408 {
409 int comment = 0;
410 int baselen = 0;
411 struct strbuf *var = &cf->var;
412
413 /* U+FEFF Byte Order Mark in UTF8 */
414 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
415 const unsigned char *bomptr = utf8_bom;
416
417 for (;;) {
418 int c = get_next_char();
419 if (bomptr && *bomptr) {
420 /* We are at the file beginning; skip UTF8-encoded BOM
421 * if present. Sane editors won't put this in on their
422 * own, but e.g. Windows Notepad will do it happily. */
423 if ((unsigned char) c == *bomptr) {
424 bomptr++;
425 continue;
426 } else {
427 /* Do not tolerate partial BOM. */
428 if (bomptr != utf8_bom)
429 break;
430 /* No BOM at file beginning. Cool. */
431 bomptr = NULL;
432 }
433 }
434 if (c == '\n') {
435 if (cf->eof)
436 return 0;
437 comment = 0;
438 continue;
439 }
440 if (comment || isspace(c))
441 continue;
442 if (c == '#' || c == ';') {
443 comment = 1;
444 continue;
445 }
446 if (c == '[') {
447 /* Reset prior to determining a new stem */
448 strbuf_reset(var);
449 if (get_base_var(var) < 0 || var->len < 1)
450 break;
451 strbuf_addch(var, '.');
452 baselen = var->len;
453 continue;
454 }
455 if (!isalpha(c))
456 break;
457 /*
458 * Truncate the var name back to the section header
459 * stem prior to grabbing the suffix part of the name
460 * and the value.
461 */
462 strbuf_setlen(var, baselen);
463 strbuf_addch(var, tolower(c));
464 if (get_value(fn, data, var) < 0)
465 break;
466 }
467 if (cf->die_on_error)
468 die("bad config file line %d in %s", cf->linenr, cf->name);
469 else
470 return error("bad config file line %d in %s", cf->linenr, cf->name);
471 }
472
473 static int parse_unit_factor(const char *end, uintmax_t *val)
474 {
475 if (!*end)
476 return 1;
477 else if (!strcasecmp(end, "k")) {
478 *val *= 1024;
479 return 1;
480 }
481 else if (!strcasecmp(end, "m")) {
482 *val *= 1024 * 1024;
483 return 1;
484 }
485 else if (!strcasecmp(end, "g")) {
486 *val *= 1024 * 1024 * 1024;
487 return 1;
488 }
489 return 0;
490 }
491
492 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
493 {
494 if (value && *value) {
495 char *end;
496 intmax_t val;
497 uintmax_t uval;
498 uintmax_t factor = 1;
499
500 errno = 0;
501 val = strtoimax(value, &end, 0);
502 if (errno == ERANGE)
503 return 0;
504 if (!parse_unit_factor(end, &factor)) {
505 errno = EINVAL;
506 return 0;
507 }
508 uval = abs(val);
509 uval *= factor;
510 if (uval > max || abs(val) > uval) {
511 errno = ERANGE;
512 return 0;
513 }
514 val *= factor;
515 *ret = val;
516 return 1;
517 }
518 errno = EINVAL;
519 return 0;
520 }
521
522 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
523 {
524 if (value && *value) {
525 char *end;
526 uintmax_t val;
527 uintmax_t oldval;
528
529 errno = 0;
530 val = strtoumax(value, &end, 0);
531 if (errno == ERANGE)
532 return 0;
533 oldval = val;
534 if (!parse_unit_factor(end, &val)) {
535 errno = EINVAL;
536 return 0;
537 }
538 if (val > max || oldval > val) {
539 errno = ERANGE;
540 return 0;
541 }
542 *ret = val;
543 return 1;
544 }
545 errno = EINVAL;
546 return 0;
547 }
548
549 static int git_parse_int(const char *value, int *ret)
550 {
551 intmax_t tmp;
552 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
553 return 0;
554 *ret = tmp;
555 return 1;
556 }
557
558 static int git_parse_int64(const char *value, int64_t *ret)
559 {
560 intmax_t tmp;
561 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
562 return 0;
563 *ret = tmp;
564 return 1;
565 }
566
567 int git_parse_ulong(const char *value, unsigned long *ret)
568 {
569 uintmax_t tmp;
570 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
571 return 0;
572 *ret = tmp;
573 return 1;
574 }
575
576 NORETURN
577 static void die_bad_number(const char *name, const char *value)
578 {
579 const char *reason = errno == ERANGE ?
580 "out of range" :
581 "invalid unit";
582 if (!value)
583 value = "";
584
585 if (cf && cf->name)
586 die("bad numeric config value '%s' for '%s' in %s: %s",
587 value, name, cf->name, reason);
588 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
589 }
590
591 int git_config_int(const char *name, const char *value)
592 {
593 int ret;
594 if (!git_parse_int(value, &ret))
595 die_bad_number(name, value);
596 return ret;
597 }
598
599 int64_t git_config_int64(const char *name, const char *value)
600 {
601 int64_t ret;
602 if (!git_parse_int64(value, &ret))
603 die_bad_number(name, value);
604 return ret;
605 }
606
607 unsigned long git_config_ulong(const char *name, const char *value)
608 {
609 unsigned long ret;
610 if (!git_parse_ulong(value, &ret))
611 die_bad_number(name, value);
612 return ret;
613 }
614
615 static int git_config_maybe_bool_text(const char *name, const char *value)
616 {
617 if (!value)
618 return 1;
619 if (!*value)
620 return 0;
621 if (!strcasecmp(value, "true")
622 || !strcasecmp(value, "yes")
623 || !strcasecmp(value, "on"))
624 return 1;
625 if (!strcasecmp(value, "false")
626 || !strcasecmp(value, "no")
627 || !strcasecmp(value, "off"))
628 return 0;
629 return -1;
630 }
631
632 int git_config_maybe_bool(const char *name, const char *value)
633 {
634 int v = git_config_maybe_bool_text(name, value);
635 if (0 <= v)
636 return v;
637 if (git_parse_int(value, &v))
638 return !!v;
639 return -1;
640 }
641
642 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
643 {
644 int v = git_config_maybe_bool_text(name, value);
645 if (0 <= v) {
646 *is_bool = 1;
647 return v;
648 }
649 *is_bool = 0;
650 return git_config_int(name, value);
651 }
652
653 int git_config_bool(const char *name, const char *value)
654 {
655 int discard;
656 return !!git_config_bool_or_int(name, value, &discard);
657 }
658
659 int git_config_string(const char **dest, const char *var, const char *value)
660 {
661 if (!value)
662 return config_error_nonbool(var);
663 *dest = xstrdup(value);
664 return 0;
665 }
666
667 int git_config_pathname(const char **dest, const char *var, const char *value)
668 {
669 if (!value)
670 return config_error_nonbool(var);
671 *dest = expand_user_path(value);
672 if (!*dest)
673 die("Failed to expand user dir in: '%s'", value);
674 return 0;
675 }
676
677 static int git_default_core_config(const char *var, const char *value)
678 {
679 /* This needs a better name */
680 if (!strcmp(var, "core.filemode")) {
681 trust_executable_bit = git_config_bool(var, value);
682 return 0;
683 }
684 if (!strcmp(var, "core.trustctime")) {
685 trust_ctime = git_config_bool(var, value);
686 return 0;
687 }
688 if (!strcmp(var, "core.checkstat")) {
689 if (!strcasecmp(value, "default"))
690 check_stat = 1;
691 else if (!strcasecmp(value, "minimal"))
692 check_stat = 0;
693 }
694
695 if (!strcmp(var, "core.quotepath")) {
696 quote_path_fully = git_config_bool(var, value);
697 return 0;
698 }
699
700 if (!strcmp(var, "core.symlinks")) {
701 has_symlinks = git_config_bool(var, value);
702 return 0;
703 }
704
705 if (!strcmp(var, "core.ignorecase")) {
706 ignore_case = git_config_bool(var, value);
707 return 0;
708 }
709
710 if (!strcmp(var, "core.attributesfile"))
711 return git_config_pathname(&git_attributes_file, var, value);
712
713 if (!strcmp(var, "core.bare")) {
714 is_bare_repository_cfg = git_config_bool(var, value);
715 return 0;
716 }
717
718 if (!strcmp(var, "core.ignorestat")) {
719 assume_unchanged = git_config_bool(var, value);
720 return 0;
721 }
722
723 if (!strcmp(var, "core.prefersymlinkrefs")) {
724 prefer_symlink_refs = git_config_bool(var, value);
725 return 0;
726 }
727
728 if (!strcmp(var, "core.logallrefupdates")) {
729 log_all_ref_updates = git_config_bool(var, value);
730 return 0;
731 }
732
733 if (!strcmp(var, "core.warnambiguousrefs")) {
734 warn_ambiguous_refs = git_config_bool(var, value);
735 return 0;
736 }
737
738 if (!strcmp(var, "core.abbrev")) {
739 int abbrev = git_config_int(var, value);
740 if (abbrev < minimum_abbrev || abbrev > 40)
741 return -1;
742 default_abbrev = abbrev;
743 return 0;
744 }
745
746 if (!strcmp(var, "core.loosecompression")) {
747 int level = git_config_int(var, value);
748 if (level == -1)
749 level = Z_DEFAULT_COMPRESSION;
750 else if (level < 0 || level > Z_BEST_COMPRESSION)
751 die("bad zlib compression level %d", level);
752 zlib_compression_level = level;
753 zlib_compression_seen = 1;
754 return 0;
755 }
756
757 if (!strcmp(var, "core.compression")) {
758 int level = git_config_int(var, value);
759 if (level == -1)
760 level = Z_DEFAULT_COMPRESSION;
761 else if (level < 0 || level > Z_BEST_COMPRESSION)
762 die("bad zlib compression level %d", level);
763 core_compression_level = level;
764 core_compression_seen = 1;
765 if (!zlib_compression_seen)
766 zlib_compression_level = level;
767 return 0;
768 }
769
770 if (!strcmp(var, "core.packedgitwindowsize")) {
771 int pgsz_x2 = getpagesize() * 2;
772 packed_git_window_size = git_config_ulong(var, value);
773
774 /* This value must be multiple of (pagesize * 2) */
775 packed_git_window_size /= pgsz_x2;
776 if (packed_git_window_size < 1)
777 packed_git_window_size = 1;
778 packed_git_window_size *= pgsz_x2;
779 return 0;
780 }
781
782 if (!strcmp(var, "core.bigfilethreshold")) {
783 big_file_threshold = git_config_ulong(var, value);
784 return 0;
785 }
786
787 if (!strcmp(var, "core.packedgitlimit")) {
788 packed_git_limit = git_config_ulong(var, value);
789 return 0;
790 }
791
792 if (!strcmp(var, "core.deltabasecachelimit")) {
793 delta_base_cache_limit = git_config_ulong(var, value);
794 return 0;
795 }
796
797 if (!strcmp(var, "core.autocrlf")) {
798 if (value && !strcasecmp(value, "input")) {
799 if (core_eol == EOL_CRLF)
800 return error("core.autocrlf=input conflicts with core.eol=crlf");
801 auto_crlf = AUTO_CRLF_INPUT;
802 return 0;
803 }
804 auto_crlf = git_config_bool(var, value);
805 return 0;
806 }
807
808 if (!strcmp(var, "core.safecrlf")) {
809 if (value && !strcasecmp(value, "warn")) {
810 safe_crlf = SAFE_CRLF_WARN;
811 return 0;
812 }
813 safe_crlf = git_config_bool(var, value);
814 return 0;
815 }
816
817 if (!strcmp(var, "core.eol")) {
818 if (value && !strcasecmp(value, "lf"))
819 core_eol = EOL_LF;
820 else if (value && !strcasecmp(value, "crlf"))
821 core_eol = EOL_CRLF;
822 else if (value && !strcasecmp(value, "native"))
823 core_eol = EOL_NATIVE;
824 else
825 core_eol = EOL_UNSET;
826 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
827 return error("core.autocrlf=input conflicts with core.eol=crlf");
828 return 0;
829 }
830
831 if (!strcmp(var, "core.notesref")) {
832 notes_ref_name = xstrdup(value);
833 return 0;
834 }
835
836 if (!strcmp(var, "core.pager"))
837 return git_config_string(&pager_program, var, value);
838
839 if (!strcmp(var, "core.editor"))
840 return git_config_string(&editor_program, var, value);
841
842 if (!strcmp(var, "core.commentchar")) {
843 if (!value)
844 return config_error_nonbool(var);
845 else if (!strcasecmp(value, "auto"))
846 auto_comment_line_char = 1;
847 else if (value[0] && !value[1]) {
848 comment_line_char = value[0];
849 auto_comment_line_char = 0;
850 } else
851 return error("core.commentChar should only be one character");
852 return 0;
853 }
854
855 if (!strcmp(var, "core.askpass"))
856 return git_config_string(&askpass_program, var, value);
857
858 if (!strcmp(var, "core.excludesfile"))
859 return git_config_pathname(&excludes_file, var, value);
860
861 if (!strcmp(var, "core.whitespace")) {
862 if (!value)
863 return config_error_nonbool(var);
864 whitespace_rule_cfg = parse_whitespace_rule(value);
865 return 0;
866 }
867
868 if (!strcmp(var, "core.fsyncobjectfiles")) {
869 fsync_object_files = git_config_bool(var, value);
870 return 0;
871 }
872
873 if (!strcmp(var, "core.preloadindex")) {
874 core_preload_index = git_config_bool(var, value);
875 return 0;
876 }
877
878 if (!strcmp(var, "core.createobject")) {
879 if (!strcmp(value, "rename"))
880 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
881 else if (!strcmp(value, "link"))
882 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
883 else
884 die("Invalid mode for object creation: %s", value);
885 return 0;
886 }
887
888 if (!strcmp(var, "core.sparsecheckout")) {
889 core_apply_sparse_checkout = git_config_bool(var, value);
890 return 0;
891 }
892
893 if (!strcmp(var, "core.precomposeunicode")) {
894 precomposed_unicode = git_config_bool(var, value);
895 return 0;
896 }
897
898 /* Add other config variables here and to Documentation/config.txt. */
899 return 0;
900 }
901
902 static int git_default_i18n_config(const char *var, const char *value)
903 {
904 if (!strcmp(var, "i18n.commitencoding"))
905 return git_config_string(&git_commit_encoding, var, value);
906
907 if (!strcmp(var, "i18n.logoutputencoding"))
908 return git_config_string(&git_log_output_encoding, var, value);
909
910 /* Add other config variables here and to Documentation/config.txt. */
911 return 0;
912 }
913
914 static int git_default_branch_config(const char *var, const char *value)
915 {
916 if (!strcmp(var, "branch.autosetupmerge")) {
917 if (value && !strcasecmp(value, "always")) {
918 git_branch_track = BRANCH_TRACK_ALWAYS;
919 return 0;
920 }
921 git_branch_track = git_config_bool(var, value);
922 return 0;
923 }
924 if (!strcmp(var, "branch.autosetuprebase")) {
925 if (!value)
926 return config_error_nonbool(var);
927 else if (!strcmp(value, "never"))
928 autorebase = AUTOREBASE_NEVER;
929 else if (!strcmp(value, "local"))
930 autorebase = AUTOREBASE_LOCAL;
931 else if (!strcmp(value, "remote"))
932 autorebase = AUTOREBASE_REMOTE;
933 else if (!strcmp(value, "always"))
934 autorebase = AUTOREBASE_ALWAYS;
935 else
936 return error("Malformed value for %s", var);
937 return 0;
938 }
939
940 /* Add other config variables here and to Documentation/config.txt. */
941 return 0;
942 }
943
944 static int git_default_push_config(const char *var, const char *value)
945 {
946 if (!strcmp(var, "push.default")) {
947 if (!value)
948 return config_error_nonbool(var);
949 else if (!strcmp(value, "nothing"))
950 push_default = PUSH_DEFAULT_NOTHING;
951 else if (!strcmp(value, "matching"))
952 push_default = PUSH_DEFAULT_MATCHING;
953 else if (!strcmp(value, "simple"))
954 push_default = PUSH_DEFAULT_SIMPLE;
955 else if (!strcmp(value, "upstream"))
956 push_default = PUSH_DEFAULT_UPSTREAM;
957 else if (!strcmp(value, "tracking")) /* deprecated */
958 push_default = PUSH_DEFAULT_UPSTREAM;
959 else if (!strcmp(value, "current"))
960 push_default = PUSH_DEFAULT_CURRENT;
961 else {
962 error("Malformed value for %s: %s", var, value);
963 return error("Must be one of nothing, matching, simple, "
964 "upstream or current.");
965 }
966 return 0;
967 }
968
969 /* Add other config variables here and to Documentation/config.txt. */
970 return 0;
971 }
972
973 static int git_default_mailmap_config(const char *var, const char *value)
974 {
975 if (!strcmp(var, "mailmap.file"))
976 return git_config_pathname(&git_mailmap_file, var, value);
977 if (!strcmp(var, "mailmap.blob"))
978 return git_config_string(&git_mailmap_blob, var, value);
979
980 /* Add other config variables here and to Documentation/config.txt. */
981 return 0;
982 }
983
984 int git_default_config(const char *var, const char *value, void *dummy)
985 {
986 if (starts_with(var, "core."))
987 return git_default_core_config(var, value);
988
989 if (starts_with(var, "user."))
990 return git_ident_config(var, value, dummy);
991
992 if (starts_with(var, "i18n."))
993 return git_default_i18n_config(var, value);
994
995 if (starts_with(var, "branch."))
996 return git_default_branch_config(var, value);
997
998 if (starts_with(var, "push."))
999 return git_default_push_config(var, value);
1000
1001 if (starts_with(var, "mailmap."))
1002 return git_default_mailmap_config(var, value);
1003
1004 if (starts_with(var, "advice."))
1005 return git_default_advice_config(var, value);
1006
1007 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1008 pager_use_color = git_config_bool(var,value);
1009 return 0;
1010 }
1011
1012 if (!strcmp(var, "pack.packsizelimit")) {
1013 pack_size_limit_cfg = git_config_ulong(var, value);
1014 return 0;
1015 }
1016 /* Add other config variables here and to Documentation/config.txt. */
1017 return 0;
1018 }
1019
1020 /*
1021 * All source specific fields in the union, die_on_error, name and the callbacks
1022 * fgetc, ungetc, ftell of top need to be initialized before calling
1023 * this function.
1024 */
1025 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1026 {
1027 int ret;
1028
1029 /* push config-file parsing state stack */
1030 top->prev = cf;
1031 top->linenr = 1;
1032 top->eof = 0;
1033 strbuf_init(&top->value, 1024);
1034 strbuf_init(&top->var, 1024);
1035 cf = top;
1036
1037 ret = git_parse_source(fn, data);
1038
1039 /* pop config-file parsing state stack */
1040 strbuf_release(&top->value);
1041 strbuf_release(&top->var);
1042 cf = top->prev;
1043
1044 return ret;
1045 }
1046
1047 static int do_config_from_file(config_fn_t fn,
1048 const char *name, const char *path, FILE *f, void *data)
1049 {
1050 struct config_source top;
1051
1052 top.u.file = f;
1053 top.name = name;
1054 top.path = path;
1055 top.die_on_error = 1;
1056 top.do_fgetc = config_file_fgetc;
1057 top.do_ungetc = config_file_ungetc;
1058 top.do_ftell = config_file_ftell;
1059
1060 return do_config_from(&top, fn, data);
1061 }
1062
1063 static int git_config_from_stdin(config_fn_t fn, void *data)
1064 {
1065 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1066 }
1067
1068 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1069 {
1070 int ret = -1;
1071 FILE *f;
1072
1073 f = fopen(filename, "r");
1074 if (f) {
1075 ret = do_config_from_file(fn, filename, filename, f, data);
1076 fclose(f);
1077 }
1078 return ret;
1079 }
1080
1081 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1082 size_t len, void *data)
1083 {
1084 struct config_source top;
1085
1086 top.u.buf.buf = buf;
1087 top.u.buf.len = len;
1088 top.u.buf.pos = 0;
1089 top.name = name;
1090 top.path = NULL;
1091 top.die_on_error = 0;
1092 top.do_fgetc = config_buf_fgetc;
1093 top.do_ungetc = config_buf_ungetc;
1094 top.do_ftell = config_buf_ftell;
1095
1096 return do_config_from(&top, fn, data);
1097 }
1098
1099 static int git_config_from_blob_sha1(config_fn_t fn,
1100 const char *name,
1101 const unsigned char *sha1,
1102 void *data)
1103 {
1104 enum object_type type;
1105 char *buf;
1106 unsigned long size;
1107 int ret;
1108
1109 buf = read_sha1_file(sha1, &type, &size);
1110 if (!buf)
1111 return error("unable to load config blob object '%s'", name);
1112 if (type != OBJ_BLOB) {
1113 free(buf);
1114 return error("reference '%s' does not point to a blob", name);
1115 }
1116
1117 ret = git_config_from_buf(fn, name, buf, size, data);
1118 free(buf);
1119
1120 return ret;
1121 }
1122
1123 static int git_config_from_blob_ref(config_fn_t fn,
1124 const char *name,
1125 void *data)
1126 {
1127 unsigned char sha1[20];
1128
1129 if (get_sha1(name, sha1) < 0)
1130 return error("unable to resolve config blob '%s'", name);
1131 return git_config_from_blob_sha1(fn, name, sha1, data);
1132 }
1133
1134 const char *git_etc_gitconfig(void)
1135 {
1136 static const char *system_wide;
1137 if (!system_wide)
1138 system_wide = system_path(ETC_GITCONFIG);
1139 return system_wide;
1140 }
1141
1142 int git_env_bool(const char *k, int def)
1143 {
1144 const char *v = getenv(k);
1145 return v ? git_config_bool(k, v) : def;
1146 }
1147
1148 int git_config_system(void)
1149 {
1150 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1151 }
1152
1153 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1154 {
1155 int ret = 0, found = 0;
1156 char *xdg_config = NULL;
1157 char *user_config = NULL;
1158
1159 home_config_paths(&user_config, &xdg_config, "config");
1160
1161 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1162 ret += git_config_from_file(fn, git_etc_gitconfig(),
1163 data);
1164 found += 1;
1165 }
1166
1167 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1168 ret += git_config_from_file(fn, xdg_config, data);
1169 found += 1;
1170 }
1171
1172 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1173 ret += git_config_from_file(fn, user_config, data);
1174 found += 1;
1175 }
1176
1177 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1178 ret += git_config_from_file(fn, repo_config, data);
1179 found += 1;
1180 }
1181
1182 switch (git_config_from_parameters(fn, data)) {
1183 case -1: /* error */
1184 die("unable to parse command-line config");
1185 break;
1186 case 0: /* found nothing */
1187 break;
1188 default: /* found at least one item */
1189 found++;
1190 break;
1191 }
1192
1193 free(xdg_config);
1194 free(user_config);
1195 return ret == 0 ? found : ret;
1196 }
1197
1198 int git_config_with_options(config_fn_t fn, void *data,
1199 struct git_config_source *config_source,
1200 int respect_includes)
1201 {
1202 char *repo_config = NULL;
1203 int ret;
1204 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1205
1206 if (respect_includes) {
1207 inc.fn = fn;
1208 inc.data = data;
1209 fn = git_config_include;
1210 data = &inc;
1211 }
1212
1213 /*
1214 * If we have a specific filename, use it. Otherwise, follow the
1215 * regular lookup sequence.
1216 */
1217 if (config_source && config_source->use_stdin)
1218 return git_config_from_stdin(fn, data);
1219 else if (config_source && config_source->file)
1220 return git_config_from_file(fn, config_source->file, data);
1221 else if (config_source && config_source->blob)
1222 return git_config_from_blob_ref(fn, config_source->blob, data);
1223
1224 repo_config = git_pathdup("config");
1225 ret = git_config_early(fn, data, repo_config);
1226 if (repo_config)
1227 free(repo_config);
1228 return ret;
1229 }
1230
1231 int git_config(config_fn_t fn, void *data)
1232 {
1233 return git_config_with_options(fn, data, NULL, 1);
1234 }
1235
1236 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1237 {
1238 struct config_set_element k;
1239 struct config_set_element *found_entry;
1240 char *normalized_key;
1241 int ret;
1242 /*
1243 * `key` may come from the user, so normalize it before using it
1244 * for querying entries from the hashmap.
1245 */
1246 ret = git_config_parse_key(key, &normalized_key, NULL);
1247
1248 if (ret)
1249 return NULL;
1250
1251 hashmap_entry_init(&k, strhash(normalized_key));
1252 k.key = normalized_key;
1253 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1254 free(normalized_key);
1255 return found_entry;
1256 }
1257
1258 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1259 {
1260 struct config_set_element *e;
1261 e = configset_find_element(cs, key);
1262 /*
1263 * Since the keys are being fed by git_config*() callback mechanism, they
1264 * are already normalized. So simply add them without any further munging.
1265 */
1266 if (!e) {
1267 e = xmalloc(sizeof(*e));
1268 hashmap_entry_init(e, strhash(key));
1269 e->key = xstrdup(key);
1270 string_list_init(&e->value_list, 1);
1271 hashmap_add(&cs->config_hash, e);
1272 }
1273 string_list_append_nodup(&e->value_list, value ? xstrdup(value) : NULL);
1274
1275 return 0;
1276 }
1277
1278 static int config_set_element_cmp(const struct config_set_element *e1,
1279 const struct config_set_element *e2, const void *unused)
1280 {
1281 return strcmp(e1->key, e2->key);
1282 }
1283
1284 void git_configset_init(struct config_set *cs)
1285 {
1286 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1287 cs->hash_initialized = 1;
1288 }
1289
1290 void git_configset_clear(struct config_set *cs)
1291 {
1292 struct config_set_element *entry;
1293 struct hashmap_iter iter;
1294 if (!cs->hash_initialized)
1295 return;
1296
1297 hashmap_iter_init(&cs->config_hash, &iter);
1298 while ((entry = hashmap_iter_next(&iter))) {
1299 free(entry->key);
1300 string_list_clear(&entry->value_list, 0);
1301 }
1302 hashmap_free(&cs->config_hash, 1);
1303 cs->hash_initialized = 0;
1304 }
1305
1306 static int config_set_callback(const char *key, const char *value, void *cb)
1307 {
1308 struct config_set *cs = cb;
1309 configset_add_value(cs, key, value);
1310 return 0;
1311 }
1312
1313 int git_configset_add_file(struct config_set *cs, const char *filename)
1314 {
1315 return git_config_from_file(config_set_callback, filename, cs);
1316 }
1317
1318 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1319 {
1320 const struct string_list *values = NULL;
1321 /*
1322 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1323 * queried key in the files of the configset, the value returned will be the last
1324 * value in the value list for that key.
1325 */
1326 values = git_configset_get_value_multi(cs, key);
1327
1328 if (!values)
1329 return 1;
1330 assert(values->nr > 0);
1331 *value = values->items[values->nr - 1].string;
1332 return 0;
1333 }
1334
1335 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1336 {
1337 struct config_set_element *e = configset_find_element(cs, key);
1338 return e ? &e->value_list : NULL;
1339 }
1340
1341 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1342 {
1343 const char *value;
1344 if (!git_configset_get_value(cs, key, &value))
1345 return git_config_string(dest, key, value);
1346 else
1347 return 1;
1348 }
1349
1350 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1351 {
1352 return git_configset_get_string_const(cs, key, (const char **)dest);
1353 }
1354
1355 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1356 {
1357 const char *value;
1358 if (!git_configset_get_value(cs, key, &value)) {
1359 *dest = git_config_int(key, value);
1360 return 0;
1361 } else
1362 return 1;
1363 }
1364
1365 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1366 {
1367 const char *value;
1368 if (!git_configset_get_value(cs, key, &value)) {
1369 *dest = git_config_ulong(key, value);
1370 return 0;
1371 } else
1372 return 1;
1373 }
1374
1375 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1376 {
1377 const char *value;
1378 if (!git_configset_get_value(cs, key, &value)) {
1379 *dest = git_config_bool(key, value);
1380 return 0;
1381 } else
1382 return 1;
1383 }
1384
1385 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1386 int *is_bool, int *dest)
1387 {
1388 const char *value;
1389 if (!git_configset_get_value(cs, key, &value)) {
1390 *dest = git_config_bool_or_int(key, value, is_bool);
1391 return 0;
1392 } else
1393 return 1;
1394 }
1395
1396 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1397 {
1398 const char *value;
1399 if (!git_configset_get_value(cs, key, &value)) {
1400 *dest = git_config_maybe_bool(key, value);
1401 if (*dest == -1)
1402 return -1;
1403 return 0;
1404 } else
1405 return 1;
1406 }
1407
1408 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1409 {
1410 const char *value;
1411 if (!git_configset_get_value(cs, key, &value))
1412 return git_config_pathname(dest, key, value);
1413 else
1414 return 1;
1415 }
1416
1417 static void git_config_check_init(void)
1418 {
1419 if (the_config_set.hash_initialized)
1420 return;
1421 git_configset_init(&the_config_set);
1422 git_config(config_set_callback, &the_config_set);
1423 }
1424
1425 void git_config_clear(void)
1426 {
1427 if (!the_config_set.hash_initialized)
1428 return;
1429 git_configset_clear(&the_config_set);
1430 }
1431
1432 int git_config_get_value(const char *key, const char **value)
1433 {
1434 git_config_check_init();
1435 return git_configset_get_value(&the_config_set, key, value);
1436 }
1437
1438 const struct string_list *git_config_get_value_multi(const char *key)
1439 {
1440 git_config_check_init();
1441 return git_configset_get_value_multi(&the_config_set, key);
1442 }
1443
1444 int git_config_get_string_const(const char *key, const char **dest)
1445 {
1446 git_config_check_init();
1447 return git_configset_get_string_const(&the_config_set, key, dest);
1448 }
1449
1450 int git_config_get_string(const char *key, char **dest)
1451 {
1452 git_config_check_init();
1453 return git_config_get_string_const(key, (const char **)dest);
1454 }
1455
1456 int git_config_get_int(const char *key, int *dest)
1457 {
1458 git_config_check_init();
1459 return git_configset_get_int(&the_config_set, key, dest);
1460 }
1461
1462 int git_config_get_ulong(const char *key, unsigned long *dest)
1463 {
1464 git_config_check_init();
1465 return git_configset_get_ulong(&the_config_set, key, dest);
1466 }
1467
1468 int git_config_get_bool(const char *key, int *dest)
1469 {
1470 git_config_check_init();
1471 return git_configset_get_bool(&the_config_set, key, dest);
1472 }
1473
1474 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1475 {
1476 git_config_check_init();
1477 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1478 }
1479
1480 int git_config_get_maybe_bool(const char *key, int *dest)
1481 {
1482 git_config_check_init();
1483 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1484 }
1485
1486 int git_config_get_pathname(const char *key, const char **dest)
1487 {
1488 git_config_check_init();
1489 return git_configset_get_pathname(&the_config_set, key, dest);
1490 }
1491
1492 /*
1493 * Find all the stuff for git_config_set() below.
1494 */
1495
1496 static struct {
1497 int baselen;
1498 char *key;
1499 int do_not_match;
1500 regex_t *value_regex;
1501 int multi_replace;
1502 size_t *offset;
1503 unsigned int offset_alloc;
1504 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1505 int seen;
1506 } store;
1507
1508 static int matches(const char *key, const char *value)
1509 {
1510 return !strcmp(key, store.key) &&
1511 (store.value_regex == NULL ||
1512 (store.do_not_match ^
1513 !regexec(store.value_regex, value, 0, NULL, 0)));
1514 }
1515
1516 static int store_aux(const char *key, const char *value, void *cb)
1517 {
1518 const char *ep;
1519 size_t section_len;
1520
1521 switch (store.state) {
1522 case KEY_SEEN:
1523 if (matches(key, value)) {
1524 if (store.seen == 1 && store.multi_replace == 0) {
1525 warning("%s has multiple values", key);
1526 }
1527
1528 ALLOC_GROW(store.offset, store.seen + 1,
1529 store.offset_alloc);
1530
1531 store.offset[store.seen] = cf->do_ftell(cf);
1532 store.seen++;
1533 }
1534 break;
1535 case SECTION_SEEN:
1536 /*
1537 * What we are looking for is in store.key (both
1538 * section and var), and its section part is baselen
1539 * long. We found key (again, both section and var).
1540 * We would want to know if this key is in the same
1541 * section as what we are looking for. We already
1542 * know we are in the same section as what should
1543 * hold store.key.
1544 */
1545 ep = strrchr(key, '.');
1546 section_len = ep - key;
1547
1548 if ((section_len != store.baselen) ||
1549 memcmp(key, store.key, section_len+1)) {
1550 store.state = SECTION_END_SEEN;
1551 break;
1552 }
1553
1554 /*
1555 * Do not increment matches: this is no match, but we
1556 * just made sure we are in the desired section.
1557 */
1558 ALLOC_GROW(store.offset, store.seen + 1,
1559 store.offset_alloc);
1560 store.offset[store.seen] = cf->do_ftell(cf);
1561 /* fallthru */
1562 case SECTION_END_SEEN:
1563 case START:
1564 if (matches(key, value)) {
1565 ALLOC_GROW(store.offset, store.seen + 1,
1566 store.offset_alloc);
1567 store.offset[store.seen] = cf->do_ftell(cf);
1568 store.state = KEY_SEEN;
1569 store.seen++;
1570 } else {
1571 if (strrchr(key, '.') - key == store.baselen &&
1572 !strncmp(key, store.key, store.baselen)) {
1573 store.state = SECTION_SEEN;
1574 ALLOC_GROW(store.offset,
1575 store.seen + 1,
1576 store.offset_alloc);
1577 store.offset[store.seen] = cf->do_ftell(cf);
1578 }
1579 }
1580 }
1581 return 0;
1582 }
1583
1584 static int write_error(const char *filename)
1585 {
1586 error("failed to write new configuration file %s", filename);
1587
1588 /* Same error code as "failed to rename". */
1589 return 4;
1590 }
1591
1592 static int store_write_section(int fd, const char *key)
1593 {
1594 const char *dot;
1595 int i, success;
1596 struct strbuf sb = STRBUF_INIT;
1597
1598 dot = memchr(key, '.', store.baselen);
1599 if (dot) {
1600 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1601 for (i = dot - key + 1; i < store.baselen; i++) {
1602 if (key[i] == '"' || key[i] == '\\')
1603 strbuf_addch(&sb, '\\');
1604 strbuf_addch(&sb, key[i]);
1605 }
1606 strbuf_addstr(&sb, "\"]\n");
1607 } else {
1608 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1609 }
1610
1611 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1612 strbuf_release(&sb);
1613
1614 return success;
1615 }
1616
1617 static int store_write_pair(int fd, const char *key, const char *value)
1618 {
1619 int i, success;
1620 int length = strlen(key + store.baselen + 1);
1621 const char *quote = "";
1622 struct strbuf sb = STRBUF_INIT;
1623
1624 /*
1625 * Check to see if the value needs to be surrounded with a dq pair.
1626 * Note that problematic characters are always backslash-quoted; this
1627 * check is about not losing leading or trailing SP and strings that
1628 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1629 * configuration parser.
1630 */
1631 if (value[0] == ' ')
1632 quote = "\"";
1633 for (i = 0; value[i]; i++)
1634 if (value[i] == ';' || value[i] == '#')
1635 quote = "\"";
1636 if (i && value[i - 1] == ' ')
1637 quote = "\"";
1638
1639 strbuf_addf(&sb, "\t%.*s = %s",
1640 length, key + store.baselen + 1, quote);
1641
1642 for (i = 0; value[i]; i++)
1643 switch (value[i]) {
1644 case '\n':
1645 strbuf_addstr(&sb, "\\n");
1646 break;
1647 case '\t':
1648 strbuf_addstr(&sb, "\\t");
1649 break;
1650 case '"':
1651 case '\\':
1652 strbuf_addch(&sb, '\\');
1653 default:
1654 strbuf_addch(&sb, value[i]);
1655 break;
1656 }
1657 strbuf_addf(&sb, "%s\n", quote);
1658
1659 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1660 strbuf_release(&sb);
1661
1662 return success;
1663 }
1664
1665 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1666 size_t offset_, int *found_bracket)
1667 {
1668 size_t equal_offset = size, bracket_offset = size;
1669 ssize_t offset;
1670
1671 contline:
1672 for (offset = offset_-2; offset > 0
1673 && contents[offset] != '\n'; offset--)
1674 switch (contents[offset]) {
1675 case '=': equal_offset = offset; break;
1676 case ']': bracket_offset = offset; break;
1677 }
1678 if (offset > 0 && contents[offset-1] == '\\') {
1679 offset_ = offset;
1680 goto contline;
1681 }
1682 if (bracket_offset < equal_offset) {
1683 *found_bracket = 1;
1684 offset = bracket_offset+1;
1685 } else
1686 offset++;
1687
1688 return offset;
1689 }
1690
1691 int git_config_set_in_file(const char *config_filename,
1692 const char *key, const char *value)
1693 {
1694 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1695 }
1696
1697 int git_config_set(const char *key, const char *value)
1698 {
1699 return git_config_set_multivar(key, value, NULL, 0);
1700 }
1701
1702 /*
1703 * Auxiliary function to sanity-check and split the key into the section
1704 * identifier and variable name.
1705 *
1706 * Returns 0 on success, -1 when there is an invalid character in the key and
1707 * -2 if there is no section name in the key.
1708 *
1709 * store_key - pointer to char* which will hold a copy of the key with
1710 * lowercase section and variable name
1711 * baselen - pointer to int which will hold the length of the
1712 * section + subsection part, can be NULL
1713 */
1714 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1715 {
1716 int i, dot, baselen;
1717 const char *last_dot = strrchr(key, '.');
1718
1719 /*
1720 * Since "key" actually contains the section name and the real
1721 * key name separated by a dot, we have to know where the dot is.
1722 */
1723
1724 if (last_dot == NULL || last_dot == key) {
1725 error("key does not contain a section: %s", key);
1726 return -CONFIG_NO_SECTION_OR_NAME;
1727 }
1728
1729 if (!last_dot[1]) {
1730 error("key does not contain variable name: %s", key);
1731 return -CONFIG_NO_SECTION_OR_NAME;
1732 }
1733
1734 baselen = last_dot - key;
1735 if (baselen_)
1736 *baselen_ = baselen;
1737
1738 /*
1739 * Validate the key and while at it, lower case it for matching.
1740 */
1741 *store_key = xmalloc(strlen(key) + 1);
1742
1743 dot = 0;
1744 for (i = 0; key[i]; i++) {
1745 unsigned char c = key[i];
1746 if (c == '.')
1747 dot = 1;
1748 /* Leave the extended basename untouched.. */
1749 if (!dot || i > baselen) {
1750 if (!iskeychar(c) ||
1751 (i == baselen + 1 && !isalpha(c))) {
1752 error("invalid key: %s", key);
1753 goto out_free_ret_1;
1754 }
1755 c = tolower(c);
1756 } else if (c == '\n') {
1757 error("invalid key (newline): %s", key);
1758 goto out_free_ret_1;
1759 }
1760 (*store_key)[i] = c;
1761 }
1762 (*store_key)[i] = 0;
1763
1764 return 0;
1765
1766 out_free_ret_1:
1767 free(*store_key);
1768 *store_key = NULL;
1769 return -CONFIG_INVALID_KEY;
1770 }
1771
1772 /*
1773 * If value==NULL, unset in (remove from) config,
1774 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1775 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1776 * else all matching key/values (regardless how many) are removed,
1777 * before the new pair is written.
1778 *
1779 * Returns 0 on success.
1780 *
1781 * This function does this:
1782 *
1783 * - it locks the config file by creating ".git/config.lock"
1784 *
1785 * - it then parses the config using store_aux() as validator to find
1786 * the position on the key/value pair to replace. If it is to be unset,
1787 * it must be found exactly once.
1788 *
1789 * - the config file is mmap()ed and the part before the match (if any) is
1790 * written to the lock file, then the changed part and the rest.
1791 *
1792 * - the config file is removed and the lock file rename()d to it.
1793 *
1794 */
1795 int git_config_set_multivar_in_file(const char *config_filename,
1796 const char *key, const char *value,
1797 const char *value_regex, int multi_replace)
1798 {
1799 int fd = -1, in_fd;
1800 int ret;
1801 struct lock_file *lock = NULL;
1802 char *filename_buf = NULL;
1803
1804 /* parse-key returns negative; flip the sign to feed exit(3) */
1805 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1806 if (ret)
1807 goto out_free;
1808
1809 store.multi_replace = multi_replace;
1810
1811 if (!config_filename)
1812 config_filename = filename_buf = git_pathdup("config");
1813
1814 /*
1815 * The lock serves a purpose in addition to locking: the new
1816 * contents of .git/config will be written into it.
1817 */
1818 lock = xcalloc(1, sizeof(struct lock_file));
1819 fd = hold_lock_file_for_update(lock, config_filename, 0);
1820 if (fd < 0) {
1821 error("could not lock config file %s: %s", config_filename, strerror(errno));
1822 free(store.key);
1823 ret = CONFIG_NO_LOCK;
1824 goto out_free;
1825 }
1826
1827 /*
1828 * If .git/config does not exist yet, write a minimal version.
1829 */
1830 in_fd = open(config_filename, O_RDONLY);
1831 if ( in_fd < 0 ) {
1832 free(store.key);
1833
1834 if ( ENOENT != errno ) {
1835 error("opening %s: %s", config_filename,
1836 strerror(errno));
1837 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1838 goto out_free;
1839 }
1840 /* if nothing to unset, error out */
1841 if (value == NULL) {
1842 ret = CONFIG_NOTHING_SET;
1843 goto out_free;
1844 }
1845
1846 store.key = (char *)key;
1847 if (!store_write_section(fd, key) ||
1848 !store_write_pair(fd, key, value))
1849 goto write_err_out;
1850 } else {
1851 struct stat st;
1852 char *contents;
1853 size_t contents_sz, copy_begin, copy_end;
1854 int i, new_line = 0;
1855
1856 if (value_regex == NULL)
1857 store.value_regex = NULL;
1858 else {
1859 if (value_regex[0] == '!') {
1860 store.do_not_match = 1;
1861 value_regex++;
1862 } else
1863 store.do_not_match = 0;
1864
1865 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1866 if (regcomp(store.value_regex, value_regex,
1867 REG_EXTENDED)) {
1868 error("invalid pattern: %s", value_regex);
1869 free(store.value_regex);
1870 ret = CONFIG_INVALID_PATTERN;
1871 goto out_free;
1872 }
1873 }
1874
1875 ALLOC_GROW(store.offset, 1, store.offset_alloc);
1876 store.offset[0] = 0;
1877 store.state = START;
1878 store.seen = 0;
1879
1880 /*
1881 * After this, store.offset will contain the *end* offset
1882 * of the last match, or remain at 0 if no match was found.
1883 * As a side effect, we make sure to transform only a valid
1884 * existing config file.
1885 */
1886 if (git_config_from_file(store_aux, config_filename, NULL)) {
1887 error("invalid config file %s", config_filename);
1888 free(store.key);
1889 if (store.value_regex != NULL) {
1890 regfree(store.value_regex);
1891 free(store.value_regex);
1892 }
1893 ret = CONFIG_INVALID_FILE;
1894 goto out_free;
1895 }
1896
1897 free(store.key);
1898 if (store.value_regex != NULL) {
1899 regfree(store.value_regex);
1900 free(store.value_regex);
1901 }
1902
1903 /* if nothing to unset, or too many matches, error out */
1904 if ((store.seen == 0 && value == NULL) ||
1905 (store.seen > 1 && multi_replace == 0)) {
1906 ret = CONFIG_NOTHING_SET;
1907 goto out_free;
1908 }
1909
1910 fstat(in_fd, &st);
1911 contents_sz = xsize_t(st.st_size);
1912 contents = xmmap(NULL, contents_sz, PROT_READ,
1913 MAP_PRIVATE, in_fd, 0);
1914 close(in_fd);
1915
1916 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
1917 error("chmod on %s failed: %s",
1918 lock->filename, strerror(errno));
1919 ret = CONFIG_NO_WRITE;
1920 goto out_free;
1921 }
1922
1923 if (store.seen == 0)
1924 store.seen = 1;
1925
1926 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1927 if (store.offset[i] == 0) {
1928 store.offset[i] = copy_end = contents_sz;
1929 } else if (store.state != KEY_SEEN) {
1930 copy_end = store.offset[i];
1931 } else
1932 copy_end = find_beginning_of_line(
1933 contents, contents_sz,
1934 store.offset[i]-2, &new_line);
1935
1936 if (copy_end > 0 && contents[copy_end-1] != '\n')
1937 new_line = 1;
1938
1939 /* write the first part of the config */
1940 if (copy_end > copy_begin) {
1941 if (write_in_full(fd, contents + copy_begin,
1942 copy_end - copy_begin) <
1943 copy_end - copy_begin)
1944 goto write_err_out;
1945 if (new_line &&
1946 write_str_in_full(fd, "\n") != 1)
1947 goto write_err_out;
1948 }
1949 copy_begin = store.offset[i];
1950 }
1951
1952 /* write the pair (value == NULL means unset) */
1953 if (value != NULL) {
1954 if (store.state == START) {
1955 if (!store_write_section(fd, key))
1956 goto write_err_out;
1957 }
1958 if (!store_write_pair(fd, key, value))
1959 goto write_err_out;
1960 }
1961
1962 /* write the rest of the config */
1963 if (copy_begin < contents_sz)
1964 if (write_in_full(fd, contents + copy_begin,
1965 contents_sz - copy_begin) <
1966 contents_sz - copy_begin)
1967 goto write_err_out;
1968
1969 munmap(contents, contents_sz);
1970 }
1971
1972 if (commit_lock_file(lock) < 0) {
1973 error("could not commit config file %s", config_filename);
1974 ret = CONFIG_NO_WRITE;
1975 goto out_free;
1976 }
1977
1978 /*
1979 * lock is committed, so don't try to roll it back below.
1980 * NOTE: Since lockfile.c keeps a linked list of all created
1981 * lock_file structures, it isn't safe to free(lock). It's
1982 * better to just leave it hanging around.
1983 */
1984 lock = NULL;
1985 ret = 0;
1986
1987 /* Invalidate the config cache */
1988 git_config_clear();
1989
1990 out_free:
1991 if (lock)
1992 rollback_lock_file(lock);
1993 free(filename_buf);
1994 return ret;
1995
1996 write_err_out:
1997 ret = write_error(lock->filename);
1998 goto out_free;
1999
2000 }
2001
2002 int git_config_set_multivar(const char *key, const char *value,
2003 const char *value_regex, int multi_replace)
2004 {
2005 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
2006 multi_replace);
2007 }
2008
2009 static int section_name_match (const char *buf, const char *name)
2010 {
2011 int i = 0, j = 0, dot = 0;
2012 if (buf[i] != '[')
2013 return 0;
2014 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2015 if (!dot && isspace(buf[i])) {
2016 dot = 1;
2017 if (name[j++] != '.')
2018 break;
2019 for (i++; isspace(buf[i]); i++)
2020 ; /* do nothing */
2021 if (buf[i] != '"')
2022 break;
2023 continue;
2024 }
2025 if (buf[i] == '\\' && dot)
2026 i++;
2027 else if (buf[i] == '"' && dot) {
2028 for (i++; isspace(buf[i]); i++)
2029 ; /* do_nothing */
2030 break;
2031 }
2032 if (buf[i] != name[j++])
2033 break;
2034 }
2035 if (buf[i] == ']' && name[j] == 0) {
2036 /*
2037 * We match, now just find the right length offset by
2038 * gobbling up any whitespace after it, as well
2039 */
2040 i++;
2041 for (; buf[i] && isspace(buf[i]); i++)
2042 ; /* do nothing */
2043 return i;
2044 }
2045 return 0;
2046 }
2047
2048 static int section_name_is_ok(const char *name)
2049 {
2050 /* Empty section names are bogus. */
2051 if (!*name)
2052 return 0;
2053
2054 /*
2055 * Before a dot, we must be alphanumeric or dash. After the first dot,
2056 * anything goes, so we can stop checking.
2057 */
2058 for (; *name && *name != '.'; name++)
2059 if (*name != '-' && !isalnum(*name))
2060 return 0;
2061 return 1;
2062 }
2063
2064 /* if new_name == NULL, the section is removed instead */
2065 int git_config_rename_section_in_file(const char *config_filename,
2066 const char *old_name, const char *new_name)
2067 {
2068 int ret = 0, remove = 0;
2069 char *filename_buf = NULL;
2070 struct lock_file *lock;
2071 int out_fd;
2072 char buf[1024];
2073 FILE *config_file;
2074 struct stat st;
2075
2076 if (new_name && !section_name_is_ok(new_name)) {
2077 ret = error("invalid section name: %s", new_name);
2078 goto out;
2079 }
2080
2081 if (!config_filename)
2082 config_filename = filename_buf = git_pathdup("config");
2083
2084 lock = xcalloc(1, sizeof(struct lock_file));
2085 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2086 if (out_fd < 0) {
2087 ret = error("could not lock config file %s", config_filename);
2088 goto out;
2089 }
2090
2091 if (!(config_file = fopen(config_filename, "rb"))) {
2092 /* no config file means nothing to rename, no error */
2093 goto unlock_and_out;
2094 }
2095
2096 fstat(fileno(config_file), &st);
2097
2098 if (chmod(lock->filename, st.st_mode & 07777) < 0) {
2099 ret = error("chmod on %s failed: %s",
2100 lock->filename, strerror(errno));
2101 goto out;
2102 }
2103
2104 while (fgets(buf, sizeof(buf), config_file)) {
2105 int i;
2106 int length;
2107 char *output = buf;
2108 for (i = 0; buf[i] && isspace(buf[i]); i++)
2109 ; /* do nothing */
2110 if (buf[i] == '[') {
2111 /* it's a section */
2112 int offset = section_name_match(&buf[i], old_name);
2113 if (offset > 0) {
2114 ret++;
2115 if (new_name == NULL) {
2116 remove = 1;
2117 continue;
2118 }
2119 store.baselen = strlen(new_name);
2120 if (!store_write_section(out_fd, new_name)) {
2121 ret = write_error(lock->filename);
2122 goto out;
2123 }
2124 /*
2125 * We wrote out the new section, with
2126 * a newline, now skip the old
2127 * section's length
2128 */
2129 output += offset + i;
2130 if (strlen(output) > 0) {
2131 /*
2132 * More content means there's
2133 * a declaration to put on the
2134 * next line; indent with a
2135 * tab
2136 */
2137 output -= 1;
2138 output[0] = '\t';
2139 }
2140 }
2141 remove = 0;
2142 }
2143 if (remove)
2144 continue;
2145 length = strlen(output);
2146 if (write_in_full(out_fd, output, length) != length) {
2147 ret = write_error(lock->filename);
2148 goto out;
2149 }
2150 }
2151 fclose(config_file);
2152 unlock_and_out:
2153 if (commit_lock_file(lock) < 0)
2154 ret = error("could not commit config file %s", config_filename);
2155 out:
2156 free(filename_buf);
2157 return ret;
2158 }
2159
2160 int git_config_rename_section(const char *old_name, const char *new_name)
2161 {
2162 return git_config_rename_section_in_file(NULL, old_name, new_name);
2163 }
2164
2165 /*
2166 * Call this to report error for your variable that should not
2167 * get a boolean value (i.e. "[my] var" means "true").
2168 */
2169 #undef config_error_nonbool
2170 int config_error_nonbool(const char *var)
2171 {
2172 return error("Missing value for '%s'", var);
2173 }
2174
2175 int parse_config_key(const char *var,
2176 const char *section,
2177 const char **subsection, int *subsection_len,
2178 const char **key)
2179 {
2180 int section_len = strlen(section);
2181 const char *dot;
2182
2183 /* Does it start with "section." ? */
2184 if (!starts_with(var, section) || var[section_len] != '.')
2185 return -1;
2186
2187 /*
2188 * Find the key; we don't know yet if we have a subsection, but we must
2189 * parse backwards from the end, since the subsection may have dots in
2190 * it, too.
2191 */
2192 dot = strrchr(var, '.');
2193 *key = dot + 1;
2194
2195 /* Did we have a subsection at all? */
2196 if (dot == var + section_len) {
2197 *subsection = NULL;
2198 *subsection_len = 0;
2199 }
2200 else {
2201 *subsection = var + section_len + 1;
2202 *subsection_len = dot - *subsection;
2203 }
2204
2205 return 0;
2206 }
Eric Wong's git-svn branch