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shorten_unambiguous_ref(): introduce a new local variable
[git/gitweb.git] / config.c
blobe1d66a145b756c49c4e4902200c354499532a428
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
13 struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
22 } u;
23 const char *name;
24 int die_on_error;
25 int linenr;
26 int eof;
27 struct strbuf value;
28 struct strbuf var;
29
30 int (*do_fgetc)(struct config_source *c);
31 int (*do_ungetc)(int c, struct config_source *conf);
32 long (*do_ftell)(struct config_source *c);
33 };
34
35 static struct config_source *cf;
36
37 static int zlib_compression_seen;
38
39 static int config_file_fgetc(struct config_source *conf)
40 {
41 return fgetc(conf->u.file);
42 }
43
44 static int config_file_ungetc(int c, struct config_source *conf)
45 {
46 return ungetc(c, conf->u.file);
47 }
48
49 static long config_file_ftell(struct config_source *conf)
50 {
51 return ftell(conf->u.file);
52 }
53
54
55 static int config_buf_fgetc(struct config_source *conf)
56 {
57 if (conf->u.buf.pos < conf->u.buf.len)
58 return conf->u.buf.buf[conf->u.buf.pos++];
59
60 return EOF;
61 }
62
63 static int config_buf_ungetc(int c, struct config_source *conf)
64 {
65 if (conf->u.buf.pos > 0)
66 return conf->u.buf.buf[--conf->u.buf.pos];
67
68 return EOF;
69 }
70
71 static long config_buf_ftell(struct config_source *conf)
72 {
73 return conf->u.buf.pos;
74 }
75
76 #define MAX_INCLUDE_DEPTH 10
77 static const char include_depth_advice[] =
78 "exceeded maximum include depth (%d) while including\n"
79 " %s\n"
80 "from\n"
81 " %s\n"
82 "Do you have circular includes?";
83 static int handle_path_include(const char *path, struct config_include_data *inc)
84 {
85 int ret = 0;
86 struct strbuf buf = STRBUF_INIT;
87 char *expanded = expand_user_path(path);
88
89 if (!expanded)
90 return error("Could not expand include path '%s'", path);
91 path = expanded;
92
93 /*
94 * Use an absolute path as-is, but interpret relative paths
95 * based on the including config file.
96 */
97 if (!is_absolute_path(path)) {
98 char *slash;
99
100 if (!cf || !cf->name)
101 return error("relative config includes must come from files");
102
103 slash = find_last_dir_sep(cf->name);
104 if (slash)
105 strbuf_add(&buf, cf->name, slash - cf->name + 1);
106 strbuf_addstr(&buf, path);
107 path = buf.buf;
108 }
109
110 if (!access_or_die(path, R_OK, 0)) {
111 if (++inc->depth > MAX_INCLUDE_DEPTH)
112 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
113 cf && cf->name ? cf->name : "the command line");
114 ret = git_config_from_file(git_config_include, path, inc);
115 inc->depth--;
116 }
117 strbuf_release(&buf);
118 free(expanded);
119 return ret;
120 }
121
122 int git_config_include(const char *var, const char *value, void *data)
123 {
124 struct config_include_data *inc = data;
125 const char *type;
126 int ret;
127
128 /*
129 * Pass along all values, including "include" directives; this makes it
130 * possible to query information on the includes themselves.
131 */
132 ret = inc->fn(var, value, inc->data);
133 if (ret < 0)
134 return ret;
135
136 type = skip_prefix(var, "include.");
137 if (!type)
138 return ret;
139
140 if (!strcmp(type, "path"))
141 ret = handle_path_include(value, inc);
142 return ret;
143 }
144
145 static void lowercase(char *p)
146 {
147 for (; *p; p++)
148 *p = tolower(*p);
149 }
150
151 void git_config_push_parameter(const char *text)
152 {
153 struct strbuf env = STRBUF_INIT;
154 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
155 if (old) {
156 strbuf_addstr(&env, old);
157 strbuf_addch(&env, ' ');
158 }
159 sq_quote_buf(&env, text);
160 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
161 strbuf_release(&env);
162 }
163
164 int git_config_parse_parameter(const char *text,
165 config_fn_t fn, void *data)
166 {
167 struct strbuf **pair;
168 pair = strbuf_split_str(text, '=', 2);
169 if (!pair[0])
170 return error("bogus config parameter: %s", text);
171 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
172 strbuf_setlen(pair[0], pair[0]->len - 1);
173 strbuf_trim(pair[0]);
174 if (!pair[0]->len) {
175 strbuf_list_free(pair);
176 return error("bogus config parameter: %s", text);
177 }
178 lowercase(pair[0]->buf);
179 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
180 strbuf_list_free(pair);
181 return -1;
182 }
183 strbuf_list_free(pair);
184 return 0;
185 }
186
187 int git_config_from_parameters(config_fn_t fn, void *data)
188 {
189 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
190 char *envw;
191 const char **argv = NULL;
192 int nr = 0, alloc = 0;
193 int i;
194
195 if (!env)
196 return 0;
197 /* sq_dequote will write over it */
198 envw = xstrdup(env);
199
200 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
201 free(envw);
202 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
203 }
204
205 for (i = 0; i < nr; i++) {
206 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
207 free(argv);
208 free(envw);
209 return -1;
210 }
211 }
212
213 free(argv);
214 free(envw);
215 return nr > 0;
216 }
217
218 static int get_next_char(void)
219 {
220 int c = cf->do_fgetc(cf);
221
222 if (c == '\r') {
223 /* DOS like systems */
224 c = cf->do_fgetc(cf);
225 if (c != '\n') {
226 cf->do_ungetc(c, cf);
227 c = '\r';
228 }
229 }
230 if (c == '\n')
231 cf->linenr++;
232 if (c == EOF) {
233 cf->eof = 1;
234 c = '\n';
235 }
236 return c;
237 }
238
239 static char *parse_value(void)
240 {
241 int quote = 0, comment = 0, space = 0;
242
243 strbuf_reset(&cf->value);
244 for (;;) {
245 int c = get_next_char();
246 if (c == '\n') {
247 if (quote) {
248 cf->linenr--;
249 return NULL;
250 }
251 return cf->value.buf;
252 }
253 if (comment)
254 continue;
255 if (isspace(c) && !quote) {
256 if (cf->value.len)
257 space++;
258 continue;
259 }
260 if (!quote) {
261 if (c == ';' || c == '#') {
262 comment = 1;
263 continue;
264 }
265 }
266 for (; space; space--)
267 strbuf_addch(&cf->value, ' ');
268 if (c == '\\') {
269 c = get_next_char();
270 switch (c) {
271 case '\n':
272 continue;
273 case 't':
274 c = '\t';
275 break;
276 case 'b':
277 c = '\b';
278 break;
279 case 'n':
280 c = '\n';
281 break;
282 /* Some characters escape as themselves */
283 case '\\': case '"':
284 break;
285 /* Reject unknown escape sequences */
286 default:
287 return NULL;
288 }
289 strbuf_addch(&cf->value, c);
290 continue;
291 }
292 if (c == '"') {
293 quote = 1-quote;
294 continue;
295 }
296 strbuf_addch(&cf->value, c);
297 }
298 }
299
300 static inline int iskeychar(int c)
301 {
302 return isalnum(c) || c == '-';
303 }
304
305 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
306 {
307 int c;
308 char *value;
309
310 /* Get the full name */
311 for (;;) {
312 c = get_next_char();
313 if (cf->eof)
314 break;
315 if (!iskeychar(c))
316 break;
317 strbuf_addch(name, tolower(c));
318 }
319
320 while (c == ' ' || c == '\t')
321 c = get_next_char();
322
323 value = NULL;
324 if (c != '\n') {
325 if (c != '=')
326 return -1;
327 value = parse_value();
328 if (!value)
329 return -1;
330 }
331 return fn(name->buf, value, data);
332 }
333
334 static int get_extended_base_var(struct strbuf *name, int c)
335 {
336 do {
337 if (c == '\n')
338 goto error_incomplete_line;
339 c = get_next_char();
340 } while (isspace(c));
341
342 /* We require the format to be '[base "extension"]' */
343 if (c != '"')
344 return -1;
345 strbuf_addch(name, '.');
346
347 for (;;) {
348 int c = get_next_char();
349 if (c == '\n')
350 goto error_incomplete_line;
351 if (c == '"')
352 break;
353 if (c == '\\') {
354 c = get_next_char();
355 if (c == '\n')
356 goto error_incomplete_line;
357 }
358 strbuf_addch(name, c);
359 }
360
361 /* Final ']' */
362 if (get_next_char() != ']')
363 return -1;
364 return 0;
365 error_incomplete_line:
366 cf->linenr--;
367 return -1;
368 }
369
370 static int get_base_var(struct strbuf *name)
371 {
372 for (;;) {
373 int c = get_next_char();
374 if (cf->eof)
375 return -1;
376 if (c == ']')
377 return 0;
378 if (isspace(c))
379 return get_extended_base_var(name, c);
380 if (!iskeychar(c) && c != '.')
381 return -1;
382 strbuf_addch(name, tolower(c));
383 }
384 }
385
386 static int git_parse_source(config_fn_t fn, void *data)
387 {
388 int comment = 0;
389 int baselen = 0;
390 struct strbuf *var = &cf->var;
391
392 /* U+FEFF Byte Order Mark in UTF8 */
393 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
394 const unsigned char *bomptr = utf8_bom;
395
396 for (;;) {
397 int c = get_next_char();
398 if (bomptr && *bomptr) {
399 /* We are at the file beginning; skip UTF8-encoded BOM
400 * if present. Sane editors won't put this in on their
401 * own, but e.g. Windows Notepad will do it happily. */
402 if ((unsigned char) c == *bomptr) {
403 bomptr++;
404 continue;
405 } else {
406 /* Do not tolerate partial BOM. */
407 if (bomptr != utf8_bom)
408 break;
409 /* No BOM at file beginning. Cool. */
410 bomptr = NULL;
411 }
412 }
413 if (c == '\n') {
414 if (cf->eof)
415 return 0;
416 comment = 0;
417 continue;
418 }
419 if (comment || isspace(c))
420 continue;
421 if (c == '#' || c == ';') {
422 comment = 1;
423 continue;
424 }
425 if (c == '[') {
426 /* Reset prior to determining a new stem */
427 strbuf_reset(var);
428 if (get_base_var(var) < 0 || var->len < 1)
429 break;
430 strbuf_addch(var, '.');
431 baselen = var->len;
432 continue;
433 }
434 if (!isalpha(c))
435 break;
436 /*
437 * Truncate the var name back to the section header
438 * stem prior to grabbing the suffix part of the name
439 * and the value.
440 */
441 strbuf_setlen(var, baselen);
442 strbuf_addch(var, tolower(c));
443 if (get_value(fn, data, var) < 0)
444 break;
445 }
446 if (cf->die_on_error)
447 die("bad config file line %d in %s", cf->linenr, cf->name);
448 else
449 return error("bad config file line %d in %s", cf->linenr, cf->name);
450 }
451
452 static int parse_unit_factor(const char *end, uintmax_t *val)
453 {
454 if (!*end)
455 return 1;
456 else if (!strcasecmp(end, "k")) {
457 *val *= 1024;
458 return 1;
459 }
460 else if (!strcasecmp(end, "m")) {
461 *val *= 1024 * 1024;
462 return 1;
463 }
464 else if (!strcasecmp(end, "g")) {
465 *val *= 1024 * 1024 * 1024;
466 return 1;
467 }
468 return 0;
469 }
470
471 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
472 {
473 if (value && *value) {
474 char *end;
475 intmax_t val;
476 uintmax_t uval;
477 uintmax_t factor = 1;
478
479 errno = 0;
480 val = strtoimax(value, &end, 0);
481 if (errno == ERANGE)
482 return 0;
483 if (!parse_unit_factor(end, &factor)) {
484 errno = EINVAL;
485 return 0;
486 }
487 uval = abs(val);
488 uval *= factor;
489 if (uval > max || abs(val) > uval) {
490 errno = ERANGE;
491 return 0;
492 }
493 val *= factor;
494 *ret = val;
495 return 1;
496 }
497 errno = EINVAL;
498 return 0;
499 }
500
501 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
502 {
503 if (value && *value) {
504 char *end;
505 uintmax_t val;
506 uintmax_t oldval;
507
508 errno = 0;
509 val = strtoumax(value, &end, 0);
510 if (errno == ERANGE)
511 return 0;
512 oldval = val;
513 if (!parse_unit_factor(end, &val)) {
514 errno = EINVAL;
515 return 0;
516 }
517 if (val > max || oldval > val) {
518 errno = ERANGE;
519 return 0;
520 }
521 *ret = val;
522 return 1;
523 }
524 errno = EINVAL;
525 return 0;
526 }
527
528 static int git_parse_int(const char *value, int *ret)
529 {
530 intmax_t tmp;
531 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
532 return 0;
533 *ret = tmp;
534 return 1;
535 }
536
537 static int git_parse_int64(const char *value, int64_t *ret)
538 {
539 intmax_t tmp;
540 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
541 return 0;
542 *ret = tmp;
543 return 1;
544 }
545
546 int git_parse_ulong(const char *value, unsigned long *ret)
547 {
548 uintmax_t tmp;
549 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
550 return 0;
551 *ret = tmp;
552 return 1;
553 }
554
555 static void die_bad_number(const char *name, const char *value)
556 {
557 const char *reason = errno == ERANGE ?
558 "out of range" :
559 "invalid unit";
560 if (!value)
561 value = "";
562
563 if (cf && cf->name)
564 die("bad numeric config value '%s' for '%s' in %s: %s",
565 value, name, cf->name, reason);
566 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
567 }
568
569 int git_config_int(const char *name, const char *value)
570 {
571 int ret;
572 if (!git_parse_int(value, &ret))
573 die_bad_number(name, value);
574 return ret;
575 }
576
577 int64_t git_config_int64(const char *name, const char *value)
578 {
579 int64_t ret;
580 if (!git_parse_int64(value, &ret))
581 die_bad_number(name, value);
582 return ret;
583 }
584
585 unsigned long git_config_ulong(const char *name, const char *value)
586 {
587 unsigned long ret;
588 if (!git_parse_ulong(value, &ret))
589 die_bad_number(name, value);
590 return ret;
591 }
592
593 static int git_config_maybe_bool_text(const char *name, const char *value)
594 {
595 if (!value)
596 return 1;
597 if (!*value)
598 return 0;
599 if (!strcasecmp(value, "true")
600 || !strcasecmp(value, "yes")
601 || !strcasecmp(value, "on"))
602 return 1;
603 if (!strcasecmp(value, "false")
604 || !strcasecmp(value, "no")
605 || !strcasecmp(value, "off"))
606 return 0;
607 return -1;
608 }
609
610 int git_config_maybe_bool(const char *name, const char *value)
611 {
612 int v = git_config_maybe_bool_text(name, value);
613 if (0 <= v)
614 return v;
615 if (git_parse_int(value, &v))
616 return !!v;
617 return -1;
618 }
619
620 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
621 {
622 int v = git_config_maybe_bool_text(name, value);
623 if (0 <= v) {
624 *is_bool = 1;
625 return v;
626 }
627 *is_bool = 0;
628 return git_config_int(name, value);
629 }
630
631 int git_config_bool(const char *name, const char *value)
632 {
633 int discard;
634 return !!git_config_bool_or_int(name, value, &discard);
635 }
636
637 int git_config_string(const char **dest, const char *var, const char *value)
638 {
639 if (!value)
640 return config_error_nonbool(var);
641 *dest = xstrdup(value);
642 return 0;
643 }
644
645 int git_config_pathname(const char **dest, const char *var, const char *value)
646 {
647 if (!value)
648 return config_error_nonbool(var);
649 *dest = expand_user_path(value);
650 if (!*dest)
651 die("Failed to expand user dir in: '%s'", value);
652 return 0;
653 }
654
655 static int git_default_core_config(const char *var, const char *value)
656 {
657 /* This needs a better name */
658 if (!strcmp(var, "core.filemode")) {
659 trust_executable_bit = git_config_bool(var, value);
660 return 0;
661 }
662 if (!strcmp(var, "core.trustctime")) {
663 trust_ctime = git_config_bool(var, value);
664 return 0;
665 }
666 if (!strcmp(var, "core.statinfo") ||
667 !strcmp(var, "core.checkstat")) {
668 /*
669 * NEEDSWORK: statinfo was a typo in v1.8.2 that has
670 * never been advertised. we will remove it at Git
671 * 2.0 boundary.
672 */
673 if (!strcmp(var, "core.statinfo")) {
674 static int warned;
675 if (!warned++) {
676 warning("'core.statinfo' will be removed in Git 2.0; "
677 "use 'core.checkstat' instead.");
678 }
679 }
680 if (!strcasecmp(value, "default"))
681 check_stat = 1;
682 else if (!strcasecmp(value, "minimal"))
683 check_stat = 0;
684 }
685
686 if (!strcmp(var, "core.quotepath")) {
687 quote_path_fully = git_config_bool(var, value);
688 return 0;
689 }
690
691 if (!strcmp(var, "core.symlinks")) {
692 has_symlinks = git_config_bool(var, value);
693 return 0;
694 }
695
696 if (!strcmp(var, "core.ignorecase")) {
697 ignore_case = git_config_bool(var, value);
698 return 0;
699 }
700
701 if (!strcmp(var, "core.attributesfile"))
702 return git_config_pathname(&git_attributes_file, var, value);
703
704 if (!strcmp(var, "core.bare")) {
705 is_bare_repository_cfg = git_config_bool(var, value);
706 return 0;
707 }
708
709 if (!strcmp(var, "core.ignorestat")) {
710 assume_unchanged = git_config_bool(var, value);
711 return 0;
712 }
713
714 if (!strcmp(var, "core.prefersymlinkrefs")) {
715 prefer_symlink_refs = git_config_bool(var, value);
716 return 0;
717 }
718
719 if (!strcmp(var, "core.logallrefupdates")) {
720 log_all_ref_updates = git_config_bool(var, value);
721 return 0;
722 }
723
724 if (!strcmp(var, "core.warnambiguousrefs")) {
725 warn_ambiguous_refs = git_config_bool(var, value);
726 return 0;
727 }
728
729 if (!strcmp(var, "core.abbrev")) {
730 int abbrev = git_config_int(var, value);
731 if (abbrev < minimum_abbrev || abbrev > 40)
732 return -1;
733 default_abbrev = abbrev;
734 return 0;
735 }
736
737 if (!strcmp(var, "core.loosecompression")) {
738 int level = git_config_int(var, value);
739 if (level == -1)
740 level = Z_DEFAULT_COMPRESSION;
741 else if (level < 0 || level > Z_BEST_COMPRESSION)
742 die("bad zlib compression level %d", level);
743 zlib_compression_level = level;
744 zlib_compression_seen = 1;
745 return 0;
746 }
747
748 if (!strcmp(var, "core.compression")) {
749 int level = git_config_int(var, value);
750 if (level == -1)
751 level = Z_DEFAULT_COMPRESSION;
752 else if (level < 0 || level > Z_BEST_COMPRESSION)
753 die("bad zlib compression level %d", level);
754 core_compression_level = level;
755 core_compression_seen = 1;
756 if (!zlib_compression_seen)
757 zlib_compression_level = level;
758 return 0;
759 }
760
761 if (!strcmp(var, "core.packedgitwindowsize")) {
762 int pgsz_x2 = getpagesize() * 2;
763 packed_git_window_size = git_config_ulong(var, value);
764
765 /* This value must be multiple of (pagesize * 2) */
766 packed_git_window_size /= pgsz_x2;
767 if (packed_git_window_size < 1)
768 packed_git_window_size = 1;
769 packed_git_window_size *= pgsz_x2;
770 return 0;
771 }
772
773 if (!strcmp(var, "core.bigfilethreshold")) {
774 big_file_threshold = git_config_ulong(var, value);
775 return 0;
776 }
777
778 if (!strcmp(var, "core.packedgitlimit")) {
779 packed_git_limit = git_config_ulong(var, value);
780 return 0;
781 }
782
783 if (!strcmp(var, "core.deltabasecachelimit")) {
784 delta_base_cache_limit = git_config_ulong(var, value);
785 return 0;
786 }
787
788 if (!strcmp(var, "core.autocrlf")) {
789 if (value && !strcasecmp(value, "input")) {
790 if (core_eol == EOL_CRLF)
791 return error("core.autocrlf=input conflicts with core.eol=crlf");
792 auto_crlf = AUTO_CRLF_INPUT;
793 return 0;
794 }
795 auto_crlf = git_config_bool(var, value);
796 return 0;
797 }
798
799 if (!strcmp(var, "core.safecrlf")) {
800 if (value && !strcasecmp(value, "warn")) {
801 safe_crlf = SAFE_CRLF_WARN;
802 return 0;
803 }
804 safe_crlf = git_config_bool(var, value);
805 return 0;
806 }
807
808 if (!strcmp(var, "core.eol")) {
809 if (value && !strcasecmp(value, "lf"))
810 core_eol = EOL_LF;
811 else if (value && !strcasecmp(value, "crlf"))
812 core_eol = EOL_CRLF;
813 else if (value && !strcasecmp(value, "native"))
814 core_eol = EOL_NATIVE;
815 else
816 core_eol = EOL_UNSET;
817 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
818 return error("core.autocrlf=input conflicts with core.eol=crlf");
819 return 0;
820 }
821
822 if (!strcmp(var, "core.notesref")) {
823 notes_ref_name = xstrdup(value);
824 return 0;
825 }
826
827 if (!strcmp(var, "core.pager"))
828 return git_config_string(&pager_program, var, value);
829
830 if (!strcmp(var, "core.editor"))
831 return git_config_string(&editor_program, var, value);
832
833 if (!strcmp(var, "core.commentchar")) {
834 const char *comment;
835 int ret = git_config_string(&comment, var, value);
836 if (!ret)
837 comment_line_char = comment[0];
838 return ret;
839 }
840
841 if (!strcmp(var, "core.askpass"))
842 return git_config_string(&askpass_program, var, value);
843
844 if (!strcmp(var, "core.excludesfile"))
845 return git_config_pathname(&excludes_file, var, value);
846
847 if (!strcmp(var, "core.whitespace")) {
848 if (!value)
849 return config_error_nonbool(var);
850 whitespace_rule_cfg = parse_whitespace_rule(value);
851 return 0;
852 }
853
854 if (!strcmp(var, "core.fsyncobjectfiles")) {
855 fsync_object_files = git_config_bool(var, value);
856 return 0;
857 }
858
859 if (!strcmp(var, "core.preloadindex")) {
860 core_preload_index = git_config_bool(var, value);
861 return 0;
862 }
863
864 if (!strcmp(var, "core.createobject")) {
865 if (!strcmp(value, "rename"))
866 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
867 else if (!strcmp(value, "link"))
868 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
869 else
870 die("Invalid mode for object creation: %s", value);
871 return 0;
872 }
873
874 if (!strcmp(var, "core.sparsecheckout")) {
875 core_apply_sparse_checkout = git_config_bool(var, value);
876 return 0;
877 }
878
879 if (!strcmp(var, "core.precomposeunicode")) {
880 precomposed_unicode = git_config_bool(var, value);
881 return 0;
882 }
883
884 /* Add other config variables here and to Documentation/config.txt. */
885 return 0;
886 }
887
888 static int git_default_i18n_config(const char *var, const char *value)
889 {
890 if (!strcmp(var, "i18n.commitencoding"))
891 return git_config_string(&git_commit_encoding, var, value);
892
893 if (!strcmp(var, "i18n.logoutputencoding"))
894 return git_config_string(&git_log_output_encoding, var, value);
895
896 /* Add other config variables here and to Documentation/config.txt. */
897 return 0;
898 }
899
900 static int git_default_branch_config(const char *var, const char *value)
901 {
902 if (!strcmp(var, "branch.autosetupmerge")) {
903 if (value && !strcasecmp(value, "always")) {
904 git_branch_track = BRANCH_TRACK_ALWAYS;
905 return 0;
906 }
907 git_branch_track = git_config_bool(var, value);
908 return 0;
909 }
910 if (!strcmp(var, "branch.autosetuprebase")) {
911 if (!value)
912 return config_error_nonbool(var);
913 else if (!strcmp(value, "never"))
914 autorebase = AUTOREBASE_NEVER;
915 else if (!strcmp(value, "local"))
916 autorebase = AUTOREBASE_LOCAL;
917 else if (!strcmp(value, "remote"))
918 autorebase = AUTOREBASE_REMOTE;
919 else if (!strcmp(value, "always"))
920 autorebase = AUTOREBASE_ALWAYS;
921 else
922 return error("Malformed value for %s", var);
923 return 0;
924 }
925
926 /* Add other config variables here and to Documentation/config.txt. */
927 return 0;
928 }
929
930 static int git_default_push_config(const char *var, const char *value)
931 {
932 if (!strcmp(var, "push.default")) {
933 if (!value)
934 return config_error_nonbool(var);
935 else if (!strcmp(value, "nothing"))
936 push_default = PUSH_DEFAULT_NOTHING;
937 else if (!strcmp(value, "matching"))
938 push_default = PUSH_DEFAULT_MATCHING;
939 else if (!strcmp(value, "simple"))
940 push_default = PUSH_DEFAULT_SIMPLE;
941 else if (!strcmp(value, "upstream"))
942 push_default = PUSH_DEFAULT_UPSTREAM;
943 else if (!strcmp(value, "tracking")) /* deprecated */
944 push_default = PUSH_DEFAULT_UPSTREAM;
945 else if (!strcmp(value, "current"))
946 push_default = PUSH_DEFAULT_CURRENT;
947 else {
948 error("Malformed value for %s: %s", var, value);
949 return error("Must be one of nothing, matching, simple, "
950 "upstream or current.");
951 }
952 return 0;
953 }
954
955 /* Add other config variables here and to Documentation/config.txt. */
956 return 0;
957 }
958
959 static int git_default_mailmap_config(const char *var, const char *value)
960 {
961 if (!strcmp(var, "mailmap.file"))
962 return git_config_string(&git_mailmap_file, var, value);
963 if (!strcmp(var, "mailmap.blob"))
964 return git_config_string(&git_mailmap_blob, var, value);
965
966 /* Add other config variables here and to Documentation/config.txt. */
967 return 0;
968 }
969
970 int git_default_config(const char *var, const char *value, void *dummy)
971 {
972 if (!prefixcmp(var, "core."))
973 return git_default_core_config(var, value);
974
975 if (!prefixcmp(var, "user."))
976 return git_ident_config(var, value, dummy);
977
978 if (!prefixcmp(var, "i18n."))
979 return git_default_i18n_config(var, value);
980
981 if (!prefixcmp(var, "branch."))
982 return git_default_branch_config(var, value);
983
984 if (!prefixcmp(var, "push."))
985 return git_default_push_config(var, value);
986
987 if (!prefixcmp(var, "mailmap."))
988 return git_default_mailmap_config(var, value);
989
990 if (!prefixcmp(var, "advice."))
991 return git_default_advice_config(var, value);
992
993 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
994 pager_use_color = git_config_bool(var,value);
995 return 0;
996 }
997
998 if (!strcmp(var, "pack.packsizelimit")) {
999 pack_size_limit_cfg = git_config_ulong(var, value);
1000 return 0;
1001 }
1002 /* Add other config variables here and to Documentation/config.txt. */
1003 return 0;
1004 }
1005
1006 /*
1007 * All source specific fields in the union, die_on_error, name and the callbacks
1008 * fgetc, ungetc, ftell of top need to be initialized before calling
1009 * this function.
1010 */
1011 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1012 {
1013 int ret;
1014
1015 /* push config-file parsing state stack */
1016 top->prev = cf;
1017 top->linenr = 1;
1018 top->eof = 0;
1019 strbuf_init(&top->value, 1024);
1020 strbuf_init(&top->var, 1024);
1021 cf = top;
1022
1023 ret = git_parse_source(fn, data);
1024
1025 /* pop config-file parsing state stack */
1026 strbuf_release(&top->value);
1027 strbuf_release(&top->var);
1028 cf = top->prev;
1029
1030 return ret;
1031 }
1032
1033 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1034 {
1035 int ret;
1036 FILE *f = fopen(filename, "r");
1037
1038 ret = -1;
1039 if (f) {
1040 struct config_source top;
1041
1042 top.u.file = f;
1043 top.name = filename;
1044 top.die_on_error = 1;
1045 top.do_fgetc = config_file_fgetc;
1046 top.do_ungetc = config_file_ungetc;
1047 top.do_ftell = config_file_ftell;
1048
1049 ret = do_config_from(&top, fn, data);
1050
1051 fclose(f);
1052 }
1053 return ret;
1054 }
1055
1056 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1057 size_t len, void *data)
1058 {
1059 struct config_source top;
1060
1061 top.u.buf.buf = buf;
1062 top.u.buf.len = len;
1063 top.u.buf.pos = 0;
1064 top.name = name;
1065 top.die_on_error = 0;
1066 top.do_fgetc = config_buf_fgetc;
1067 top.do_ungetc = config_buf_ungetc;
1068 top.do_ftell = config_buf_ftell;
1069
1070 return do_config_from(&top, fn, data);
1071 }
1072
1073 static int git_config_from_blob_sha1(config_fn_t fn,
1074 const char *name,
1075 const unsigned char *sha1,
1076 void *data)
1077 {
1078 enum object_type type;
1079 char *buf;
1080 unsigned long size;
1081 int ret;
1082
1083 buf = read_sha1_file(sha1, &type, &size);
1084 if (!buf)
1085 return error("unable to load config blob object '%s'", name);
1086 if (type != OBJ_BLOB) {
1087 free(buf);
1088 return error("reference '%s' does not point to a blob", name);
1089 }
1090
1091 ret = git_config_from_buf(fn, name, buf, size, data);
1092 free(buf);
1093
1094 return ret;
1095 }
1096
1097 static int git_config_from_blob_ref(config_fn_t fn,
1098 const char *name,
1099 void *data)
1100 {
1101 unsigned char sha1[20];
1102
1103 if (get_sha1(name, sha1) < 0)
1104 return error("unable to resolve config blob '%s'", name);
1105 return git_config_from_blob_sha1(fn, name, sha1, data);
1106 }
1107
1108 const char *git_etc_gitconfig(void)
1109 {
1110 static const char *system_wide;
1111 if (!system_wide)
1112 system_wide = system_path(ETC_GITCONFIG);
1113 return system_wide;
1114 }
1115
1116 int git_env_bool(const char *k, int def)
1117 {
1118 const char *v = getenv(k);
1119 return v ? git_config_bool(k, v) : def;
1120 }
1121
1122 int git_config_system(void)
1123 {
1124 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1125 }
1126
1127 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1128 {
1129 int ret = 0, found = 0;
1130 char *xdg_config = NULL;
1131 char *user_config = NULL;
1132
1133 home_config_paths(&user_config, &xdg_config, "config");
1134
1135 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1136 ret += git_config_from_file(fn, git_etc_gitconfig(),
1137 data);
1138 found += 1;
1139 }
1140
1141 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1142 ret += git_config_from_file(fn, xdg_config, data);
1143 found += 1;
1144 }
1145
1146 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1147 ret += git_config_from_file(fn, user_config, data);
1148 found += 1;
1149 }
1150
1151 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1152 ret += git_config_from_file(fn, repo_config, data);
1153 found += 1;
1154 }
1155
1156 switch (git_config_from_parameters(fn, data)) {
1157 case -1: /* error */
1158 die("unable to parse command-line config");
1159 break;
1160 case 0: /* found nothing */
1161 break;
1162 default: /* found at least one item */
1163 found++;
1164 break;
1165 }
1166
1167 free(xdg_config);
1168 free(user_config);
1169 return ret == 0 ? found : ret;
1170 }
1171
1172 int git_config_with_options(config_fn_t fn, void *data,
1173 const char *filename,
1174 const char *blob_ref,
1175 int respect_includes)
1176 {
1177 char *repo_config = NULL;
1178 int ret;
1179 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1180
1181 if (respect_includes) {
1182 inc.fn = fn;
1183 inc.data = data;
1184 fn = git_config_include;
1185 data = &inc;
1186 }
1187
1188 /*
1189 * If we have a specific filename, use it. Otherwise, follow the
1190 * regular lookup sequence.
1191 */
1192 if (filename)
1193 return git_config_from_file(fn, filename, data);
1194 else if (blob_ref)
1195 return git_config_from_blob_ref(fn, blob_ref, data);
1196
1197 repo_config = git_pathdup("config");
1198 ret = git_config_early(fn, data, repo_config);
1199 if (repo_config)
1200 free(repo_config);
1201 return ret;
1202 }
1203
1204 int git_config(config_fn_t fn, void *data)
1205 {
1206 return git_config_with_options(fn, data, NULL, NULL, 1);
1207 }
1208
1209 /*
1210 * Find all the stuff for git_config_set() below.
1211 */
1212
1213 #define MAX_MATCHES 512
1214
1215 static struct {
1216 int baselen;
1217 char *key;
1218 int do_not_match;
1219 regex_t *value_regex;
1220 int multi_replace;
1221 size_t offset[MAX_MATCHES];
1222 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1223 int seen;
1224 } store;
1225
1226 static int matches(const char *key, const char *value)
1227 {
1228 return !strcmp(key, store.key) &&
1229 (store.value_regex == NULL ||
1230 (store.do_not_match ^
1231 !regexec(store.value_regex, value, 0, NULL, 0)));
1232 }
1233
1234 static int store_aux(const char *key, const char *value, void *cb)
1235 {
1236 const char *ep;
1237 size_t section_len;
1238
1239 switch (store.state) {
1240 case KEY_SEEN:
1241 if (matches(key, value)) {
1242 if (store.seen == 1 && store.multi_replace == 0) {
1243 warning("%s has multiple values", key);
1244 } else if (store.seen >= MAX_MATCHES) {
1245 error("too many matches for %s", key);
1246 return 1;
1247 }
1248
1249 store.offset[store.seen] = cf->do_ftell(cf);
1250 store.seen++;
1251 }
1252 break;
1253 case SECTION_SEEN:
1254 /*
1255 * What we are looking for is in store.key (both
1256 * section and var), and its section part is baselen
1257 * long. We found key (again, both section and var).
1258 * We would want to know if this key is in the same
1259 * section as what we are looking for. We already
1260 * know we are in the same section as what should
1261 * hold store.key.
1262 */
1263 ep = strrchr(key, '.');
1264 section_len = ep - key;
1265
1266 if ((section_len != store.baselen) ||
1267 memcmp(key, store.key, section_len+1)) {
1268 store.state = SECTION_END_SEEN;
1269 break;
1270 }
1271
1272 /*
1273 * Do not increment matches: this is no match, but we
1274 * just made sure we are in the desired section.
1275 */
1276 store.offset[store.seen] = cf->do_ftell(cf);
1277 /* fallthru */
1278 case SECTION_END_SEEN:
1279 case START:
1280 if (matches(key, value)) {
1281 store.offset[store.seen] = cf->do_ftell(cf);
1282 store.state = KEY_SEEN;
1283 store.seen++;
1284 } else {
1285 if (strrchr(key, '.') - key == store.baselen &&
1286 !strncmp(key, store.key, store.baselen)) {
1287 store.state = SECTION_SEEN;
1288 store.offset[store.seen] = cf->do_ftell(cf);
1289 }
1290 }
1291 }
1292 return 0;
1293 }
1294
1295 static int write_error(const char *filename)
1296 {
1297 error("failed to write new configuration file %s", filename);
1298
1299 /* Same error code as "failed to rename". */
1300 return 4;
1301 }
1302
1303 static int store_write_section(int fd, const char *key)
1304 {
1305 const char *dot;
1306 int i, success;
1307 struct strbuf sb = STRBUF_INIT;
1308
1309 dot = memchr(key, '.', store.baselen);
1310 if (dot) {
1311 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1312 for (i = dot - key + 1; i < store.baselen; i++) {
1313 if (key[i] == '"' || key[i] == '\\')
1314 strbuf_addch(&sb, '\\');
1315 strbuf_addch(&sb, key[i]);
1316 }
1317 strbuf_addstr(&sb, "\"]\n");
1318 } else {
1319 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1320 }
1321
1322 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1323 strbuf_release(&sb);
1324
1325 return success;
1326 }
1327
1328 static int store_write_pair(int fd, const char *key, const char *value)
1329 {
1330 int i, success;
1331 int length = strlen(key + store.baselen + 1);
1332 const char *quote = "";
1333 struct strbuf sb = STRBUF_INIT;
1334
1335 /*
1336 * Check to see if the value needs to be surrounded with a dq pair.
1337 * Note that problematic characters are always backslash-quoted; this
1338 * check is about not losing leading or trailing SP and strings that
1339 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1340 * configuration parser.
1341 */
1342 if (value[0] == ' ')
1343 quote = "\"";
1344 for (i = 0; value[i]; i++)
1345 if (value[i] == ';' || value[i] == '#')
1346 quote = "\"";
1347 if (i && value[i - 1] == ' ')
1348 quote = "\"";
1349
1350 strbuf_addf(&sb, "\t%.*s = %s",
1351 length, key + store.baselen + 1, quote);
1352
1353 for (i = 0; value[i]; i++)
1354 switch (value[i]) {
1355 case '\n':
1356 strbuf_addstr(&sb, "\\n");
1357 break;
1358 case '\t':
1359 strbuf_addstr(&sb, "\\t");
1360 break;
1361 case '"':
1362 case '\\':
1363 strbuf_addch(&sb, '\\');
1364 default:
1365 strbuf_addch(&sb, value[i]);
1366 break;
1367 }
1368 strbuf_addf(&sb, "%s\n", quote);
1369
1370 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1371 strbuf_release(&sb);
1372
1373 return success;
1374 }
1375
1376 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1377 size_t offset_, int *found_bracket)
1378 {
1379 size_t equal_offset = size, bracket_offset = size;
1380 ssize_t offset;
1381
1382 contline:
1383 for (offset = offset_-2; offset > 0
1384 && contents[offset] != '\n'; offset--)
1385 switch (contents[offset]) {
1386 case '=': equal_offset = offset; break;
1387 case ']': bracket_offset = offset; break;
1388 }
1389 if (offset > 0 && contents[offset-1] == '\\') {
1390 offset_ = offset;
1391 goto contline;
1392 }
1393 if (bracket_offset < equal_offset) {
1394 *found_bracket = 1;
1395 offset = bracket_offset+1;
1396 } else
1397 offset++;
1398
1399 return offset;
1400 }
1401
1402 int git_config_set_in_file(const char *config_filename,
1403 const char *key, const char *value)
1404 {
1405 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1406 }
1407
1408 int git_config_set(const char *key, const char *value)
1409 {
1410 return git_config_set_multivar(key, value, NULL, 0);
1411 }
1412
1413 /*
1414 * Auxiliary function to sanity-check and split the key into the section
1415 * identifier and variable name.
1416 *
1417 * Returns 0 on success, -1 when there is an invalid character in the key and
1418 * -2 if there is no section name in the key.
1419 *
1420 * store_key - pointer to char* which will hold a copy of the key with
1421 * lowercase section and variable name
1422 * baselen - pointer to int which will hold the length of the
1423 * section + subsection part, can be NULL
1424 */
1425 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1426 {
1427 int i, dot, baselen;
1428 const char *last_dot = strrchr(key, '.');
1429
1430 /*
1431 * Since "key" actually contains the section name and the real
1432 * key name separated by a dot, we have to know where the dot is.
1433 */
1434
1435 if (last_dot == NULL || last_dot == key) {
1436 error("key does not contain a section: %s", key);
1437 return -CONFIG_NO_SECTION_OR_NAME;
1438 }
1439
1440 if (!last_dot[1]) {
1441 error("key does not contain variable name: %s", key);
1442 return -CONFIG_NO_SECTION_OR_NAME;
1443 }
1444
1445 baselen = last_dot - key;
1446 if (baselen_)
1447 *baselen_ = baselen;
1448
1449 /*
1450 * Validate the key and while at it, lower case it for matching.
1451 */
1452 *store_key = xmalloc(strlen(key) + 1);
1453
1454 dot = 0;
1455 for (i = 0; key[i]; i++) {
1456 unsigned char c = key[i];
1457 if (c == '.')
1458 dot = 1;
1459 /* Leave the extended basename untouched.. */
1460 if (!dot || i > baselen) {
1461 if (!iskeychar(c) ||
1462 (i == baselen + 1 && !isalpha(c))) {
1463 error("invalid key: %s", key);
1464 goto out_free_ret_1;
1465 }
1466 c = tolower(c);
1467 } else if (c == '\n') {
1468 error("invalid key (newline): %s", key);
1469 goto out_free_ret_1;
1470 }
1471 (*store_key)[i] = c;
1472 }
1473 (*store_key)[i] = 0;
1474
1475 return 0;
1476
1477 out_free_ret_1:
1478 free(*store_key);
1479 *store_key = NULL;
1480 return -CONFIG_INVALID_KEY;
1481 }
1482
1483 /*
1484 * If value==NULL, unset in (remove from) config,
1485 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1486 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1487 * else all matching key/values (regardless how many) are removed,
1488 * before the new pair is written.
1489 *
1490 * Returns 0 on success.
1491 *
1492 * This function does this:
1493 *
1494 * - it locks the config file by creating ".git/config.lock"
1495 *
1496 * - it then parses the config using store_aux() as validator to find
1497 * the position on the key/value pair to replace. If it is to be unset,
1498 * it must be found exactly once.
1499 *
1500 * - the config file is mmap()ed and the part before the match (if any) is
1501 * written to the lock file, then the changed part and the rest.
1502 *
1503 * - the config file is removed and the lock file rename()d to it.
1504 *
1505 */
1506 int git_config_set_multivar_in_file(const char *config_filename,
1507 const char *key, const char *value,
1508 const char *value_regex, int multi_replace)
1509 {
1510 int fd = -1, in_fd;
1511 int ret;
1512 struct lock_file *lock = NULL;
1513 char *filename_buf = NULL;
1514
1515 /* parse-key returns negative; flip the sign to feed exit(3) */
1516 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1517 if (ret)
1518 goto out_free;
1519
1520 store.multi_replace = multi_replace;
1521
1522 if (!config_filename)
1523 config_filename = filename_buf = git_pathdup("config");
1524
1525 /*
1526 * The lock serves a purpose in addition to locking: the new
1527 * contents of .git/config will be written into it.
1528 */
1529 lock = xcalloc(sizeof(struct lock_file), 1);
1530 fd = hold_lock_file_for_update(lock, config_filename, 0);
1531 if (fd < 0) {
1532 error("could not lock config file %s: %s", config_filename, strerror(errno));
1533 free(store.key);
1534 ret = CONFIG_NO_LOCK;
1535 goto out_free;
1536 }
1537
1538 /*
1539 * If .git/config does not exist yet, write a minimal version.
1540 */
1541 in_fd = open(config_filename, O_RDONLY);
1542 if ( in_fd < 0 ) {
1543 free(store.key);
1544
1545 if ( ENOENT != errno ) {
1546 error("opening %s: %s", config_filename,
1547 strerror(errno));
1548 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1549 goto out_free;
1550 }
1551 /* if nothing to unset, error out */
1552 if (value == NULL) {
1553 ret = CONFIG_NOTHING_SET;
1554 goto out_free;
1555 }
1556
1557 store.key = (char *)key;
1558 if (!store_write_section(fd, key) ||
1559 !store_write_pair(fd, key, value))
1560 goto write_err_out;
1561 } else {
1562 struct stat st;
1563 char *contents;
1564 size_t contents_sz, copy_begin, copy_end;
1565 int i, new_line = 0;
1566
1567 if (value_regex == NULL)
1568 store.value_regex = NULL;
1569 else {
1570 if (value_regex[0] == '!') {
1571 store.do_not_match = 1;
1572 value_regex++;
1573 } else
1574 store.do_not_match = 0;
1575
1576 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1577 if (regcomp(store.value_regex, value_regex,
1578 REG_EXTENDED)) {
1579 error("invalid pattern: %s", value_regex);
1580 free(store.value_regex);
1581 ret = CONFIG_INVALID_PATTERN;
1582 goto out_free;
1583 }
1584 }
1585
1586 store.offset[0] = 0;
1587 store.state = START;
1588 store.seen = 0;
1589
1590 /*
1591 * After this, store.offset will contain the *end* offset
1592 * of the last match, or remain at 0 if no match was found.
1593 * As a side effect, we make sure to transform only a valid
1594 * existing config file.
1595 */
1596 if (git_config_from_file(store_aux, config_filename, NULL)) {
1597 error("invalid config file %s", config_filename);
1598 free(store.key);
1599 if (store.value_regex != NULL) {
1600 regfree(store.value_regex);
1601 free(store.value_regex);
1602 }
1603 ret = CONFIG_INVALID_FILE;
1604 goto out_free;
1605 }
1606
1607 free(store.key);
1608 if (store.value_regex != NULL) {
1609 regfree(store.value_regex);
1610 free(store.value_regex);
1611 }
1612
1613 /* if nothing to unset, or too many matches, error out */
1614 if ((store.seen == 0 && value == NULL) ||
1615 (store.seen > 1 && multi_replace == 0)) {
1616 ret = CONFIG_NOTHING_SET;
1617 goto out_free;
1618 }
1619
1620 fstat(in_fd, &st);
1621 contents_sz = xsize_t(st.st_size);
1622 contents = xmmap(NULL, contents_sz, PROT_READ,
1623 MAP_PRIVATE, in_fd, 0);
1624 close(in_fd);
1625
1626 if (store.seen == 0)
1627 store.seen = 1;
1628
1629 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1630 if (store.offset[i] == 0) {
1631 store.offset[i] = copy_end = contents_sz;
1632 } else if (store.state != KEY_SEEN) {
1633 copy_end = store.offset[i];
1634 } else
1635 copy_end = find_beginning_of_line(
1636 contents, contents_sz,
1637 store.offset[i]-2, &new_line);
1638
1639 if (copy_end > 0 && contents[copy_end-1] != '\n')
1640 new_line = 1;
1641
1642 /* write the first part of the config */
1643 if (copy_end > copy_begin) {
1644 if (write_in_full(fd, contents + copy_begin,
1645 copy_end - copy_begin) <
1646 copy_end - copy_begin)
1647 goto write_err_out;
1648 if (new_line &&
1649 write_str_in_full(fd, "\n") != 1)
1650 goto write_err_out;
1651 }
1652 copy_begin = store.offset[i];
1653 }
1654
1655 /* write the pair (value == NULL means unset) */
1656 if (value != NULL) {
1657 if (store.state == START) {
1658 if (!store_write_section(fd, key))
1659 goto write_err_out;
1660 }
1661 if (!store_write_pair(fd, key, value))
1662 goto write_err_out;
1663 }
1664
1665 /* write the rest of the config */
1666 if (copy_begin < contents_sz)
1667 if (write_in_full(fd, contents + copy_begin,
1668 contents_sz - copy_begin) <
1669 contents_sz - copy_begin)
1670 goto write_err_out;
1671
1672 munmap(contents, contents_sz);
1673 }
1674
1675 if (commit_lock_file(lock) < 0) {
1676 error("could not commit config file %s", config_filename);
1677 ret = CONFIG_NO_WRITE;
1678 goto out_free;
1679 }
1680
1681 /*
1682 * lock is committed, so don't try to roll it back below.
1683 * NOTE: Since lockfile.c keeps a linked list of all created
1684 * lock_file structures, it isn't safe to free(lock). It's
1685 * better to just leave it hanging around.
1686 */
1687 lock = NULL;
1688 ret = 0;
1689
1690 out_free:
1691 if (lock)
1692 rollback_lock_file(lock);
1693 free(filename_buf);
1694 return ret;
1695
1696 write_err_out:
1697 ret = write_error(lock->filename);
1698 goto out_free;
1699
1700 }
1701
1702 int git_config_set_multivar(const char *key, const char *value,
1703 const char *value_regex, int multi_replace)
1704 {
1705 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1706 multi_replace);
1707 }
1708
1709 static int section_name_match (const char *buf, const char *name)
1710 {
1711 int i = 0, j = 0, dot = 0;
1712 if (buf[i] != '[')
1713 return 0;
1714 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1715 if (!dot && isspace(buf[i])) {
1716 dot = 1;
1717 if (name[j++] != '.')
1718 break;
1719 for (i++; isspace(buf[i]); i++)
1720 ; /* do nothing */
1721 if (buf[i] != '"')
1722 break;
1723 continue;
1724 }
1725 if (buf[i] == '\\' && dot)
1726 i++;
1727 else if (buf[i] == '"' && dot) {
1728 for (i++; isspace(buf[i]); i++)
1729 ; /* do_nothing */
1730 break;
1731 }
1732 if (buf[i] != name[j++])
1733 break;
1734 }
1735 if (buf[i] == ']' && name[j] == 0) {
1736 /*
1737 * We match, now just find the right length offset by
1738 * gobbling up any whitespace after it, as well
1739 */
1740 i++;
1741 for (; buf[i] && isspace(buf[i]); i++)
1742 ; /* do nothing */
1743 return i;
1744 }
1745 return 0;
1746 }
1747
1748 static int section_name_is_ok(const char *name)
1749 {
1750 /* Empty section names are bogus. */
1751 if (!*name)
1752 return 0;
1753
1754 /*
1755 * Before a dot, we must be alphanumeric or dash. After the first dot,
1756 * anything goes, so we can stop checking.
1757 */
1758 for (; *name && *name != '.'; name++)
1759 if (*name != '-' && !isalnum(*name))
1760 return 0;
1761 return 1;
1762 }
1763
1764 /* if new_name == NULL, the section is removed instead */
1765 int git_config_rename_section_in_file(const char *config_filename,
1766 const char *old_name, const char *new_name)
1767 {
1768 int ret = 0, remove = 0;
1769 char *filename_buf = NULL;
1770 struct lock_file *lock;
1771 int out_fd;
1772 char buf[1024];
1773 FILE *config_file;
1774
1775 if (new_name && !section_name_is_ok(new_name)) {
1776 ret = error("invalid section name: %s", new_name);
1777 goto out;
1778 }
1779
1780 if (!config_filename)
1781 config_filename = filename_buf = git_pathdup("config");
1782
1783 lock = xcalloc(sizeof(struct lock_file), 1);
1784 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1785 if (out_fd < 0) {
1786 ret = error("could not lock config file %s", config_filename);
1787 goto out;
1788 }
1789
1790 if (!(config_file = fopen(config_filename, "rb"))) {
1791 /* no config file means nothing to rename, no error */
1792 goto unlock_and_out;
1793 }
1794
1795 while (fgets(buf, sizeof(buf), config_file)) {
1796 int i;
1797 int length;
1798 char *output = buf;
1799 for (i = 0; buf[i] && isspace(buf[i]); i++)
1800 ; /* do nothing */
1801 if (buf[i] == '[') {
1802 /* it's a section */
1803 int offset = section_name_match(&buf[i], old_name);
1804 if (offset > 0) {
1805 ret++;
1806 if (new_name == NULL) {
1807 remove = 1;
1808 continue;
1809 }
1810 store.baselen = strlen(new_name);
1811 if (!store_write_section(out_fd, new_name)) {
1812 ret = write_error(lock->filename);
1813 goto out;
1814 }
1815 /*
1816 * We wrote out the new section, with
1817 * a newline, now skip the old
1818 * section's length
1819 */
1820 output += offset + i;
1821 if (strlen(output) > 0) {
1822 /*
1823 * More content means there's
1824 * a declaration to put on the
1825 * next line; indent with a
1826 * tab
1827 */
1828 output -= 1;
1829 output[0] = '\t';
1830 }
1831 }
1832 remove = 0;
1833 }
1834 if (remove)
1835 continue;
1836 length = strlen(output);
1837 if (write_in_full(out_fd, output, length) != length) {
1838 ret = write_error(lock->filename);
1839 goto out;
1840 }
1841 }
1842 fclose(config_file);
1843 unlock_and_out:
1844 if (commit_lock_file(lock) < 0)
1845 ret = error("could not commit config file %s", config_filename);
1846 out:
1847 free(filename_buf);
1848 return ret;
1849 }
1850
1851 int git_config_rename_section(const char *old_name, const char *new_name)
1852 {
1853 return git_config_rename_section_in_file(NULL, old_name, new_name);
1854 }
1855
1856 /*
1857 * Call this to report error for your variable that should not
1858 * get a boolean value (i.e. "[my] var" means "true").
1859 */
1860 #undef config_error_nonbool
1861 int config_error_nonbool(const char *var)
1862 {
1863 return error("Missing value for '%s'", var);
1864 }
1865
1866 int parse_config_key(const char *var,
1867 const char *section,
1868 const char **subsection, int *subsection_len,
1869 const char **key)
1870 {
1871 int section_len = strlen(section);
1872 const char *dot;
1873
1874 /* Does it start with "section." ? */
1875 if (prefixcmp(var, section) || var[section_len] != '.')
1876 return -1;
1877
1878 /*
1879 * Find the key; we don't know yet if we have a subsection, but we must
1880 * parse backwards from the end, since the subsection may have dots in
1881 * it, too.
1882 */
1883 dot = strrchr(var, '.');
1884 *key = dot + 1;
1885
1886 /* Did we have a subsection at all? */
1887 if (dot == var + section_len) {
1888 *subsection = NULL;
1889 *subsection_len = 0;
1890 }
1891 else {
1892 *subsection = var + section_len + 1;
1893 *subsection_len = dot - *subsection;
1894 }
1895
1896 return 0;
1897 }
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