Allow custom "comment char"
[git/git.git] / config.c
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
12
13 typedef struct config_file {
14 struct config_file *prev;
15 FILE *f;
16 const char *name;
17 int linenr;
18 int eof;
19 struct strbuf value;
20 struct strbuf var;
21 } config_file;
22
23 static config_file *cf;
24
25 static int zlib_compression_seen;
26
27 #define MAX_INCLUDE_DEPTH 10
28 static const char include_depth_advice[] =
29 "exceeded maximum include depth (%d) while including\n"
30 " %s\n"
31 "from\n"
32 " %s\n"
33 "Do you have circular includes?";
34 static int handle_path_include(const char *path, struct config_include_data *inc)
35 {
36 int ret = 0;
37 struct strbuf buf = STRBUF_INIT;
38 char *expanded = expand_user_path(path);
39
40 if (!expanded)
41 return error("Could not expand include path '%s'", path);
42 path = expanded;
43
44 /*
45 * Use an absolute path as-is, but interpret relative paths
46 * based on the including config file.
47 */
48 if (!is_absolute_path(path)) {
49 char *slash;
50
51 if (!cf || !cf->name)
52 return error("relative config includes must come from files");
53
54 slash = find_last_dir_sep(cf->name);
55 if (slash)
56 strbuf_add(&buf, cf->name, slash - cf->name + 1);
57 strbuf_addstr(&buf, path);
58 path = buf.buf;
59 }
60
61 if (!access_or_die(path, R_OK)) {
62 if (++inc->depth > MAX_INCLUDE_DEPTH)
63 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
64 cf && cf->name ? cf->name : "the command line");
65 ret = git_config_from_file(git_config_include, path, inc);
66 inc->depth--;
67 }
68 strbuf_release(&buf);
69 free(expanded);
70 return ret;
71 }
72
73 int git_config_include(const char *var, const char *value, void *data)
74 {
75 struct config_include_data *inc = data;
76 const char *type;
77 int ret;
78
79 /*
80 * Pass along all values, including "include" directives; this makes it
81 * possible to query information on the includes themselves.
82 */
83 ret = inc->fn(var, value, inc->data);
84 if (ret < 0)
85 return ret;
86
87 type = skip_prefix(var, "include.");
88 if (!type)
89 return ret;
90
91 if (!strcmp(type, "path"))
92 ret = handle_path_include(value, inc);
93 return ret;
94 }
95
96 static void lowercase(char *p)
97 {
98 for (; *p; p++)
99 *p = tolower(*p);
100 }
101
102 void git_config_push_parameter(const char *text)
103 {
104 struct strbuf env = STRBUF_INIT;
105 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
106 if (old) {
107 strbuf_addstr(&env, old);
108 strbuf_addch(&env, ' ');
109 }
110 sq_quote_buf(&env, text);
111 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
112 strbuf_release(&env);
113 }
114
115 int git_config_parse_parameter(const char *text,
116 config_fn_t fn, void *data)
117 {
118 struct strbuf **pair;
119 pair = strbuf_split_str(text, '=', 2);
120 if (!pair[0])
121 return error("bogus config parameter: %s", text);
122 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
123 strbuf_setlen(pair[0], pair[0]->len - 1);
124 strbuf_trim(pair[0]);
125 if (!pair[0]->len) {
126 strbuf_list_free(pair);
127 return error("bogus config parameter: %s", text);
128 }
129 lowercase(pair[0]->buf);
130 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
131 strbuf_list_free(pair);
132 return -1;
133 }
134 strbuf_list_free(pair);
135 return 0;
136 }
137
138 int git_config_from_parameters(config_fn_t fn, void *data)
139 {
140 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
141 char *envw;
142 const char **argv = NULL;
143 int nr = 0, alloc = 0;
144 int i;
145
146 if (!env)
147 return 0;
148 /* sq_dequote will write over it */
149 envw = xstrdup(env);
150
151 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
152 free(envw);
153 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
154 }
155
156 for (i = 0; i < nr; i++) {
157 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
158 free(argv);
159 free(envw);
160 return -1;
161 }
162 }
163
164 free(argv);
165 free(envw);
166 return nr > 0;
167 }
168
169 static int get_next_char(void)
170 {
171 int c;
172 FILE *f;
173
174 c = '\n';
175 if (cf && ((f = cf->f) != NULL)) {
176 c = fgetc(f);
177 if (c == '\r') {
178 /* DOS like systems */
179 c = fgetc(f);
180 if (c != '\n') {
181 ungetc(c, f);
182 c = '\r';
183 }
184 }
185 if (c == '\n')
186 cf->linenr++;
187 if (c == EOF) {
188 cf->eof = 1;
189 c = '\n';
190 }
191 }
192 return c;
193 }
194
195 static char *parse_value(void)
196 {
197 int quote = 0, comment = 0, space = 0;
198
199 strbuf_reset(&cf->value);
200 for (;;) {
201 int c = get_next_char();
202 if (c == '\n') {
203 if (quote) {
204 cf->linenr--;
205 return NULL;
206 }
207 return cf->value.buf;
208 }
209 if (comment)
210 continue;
211 if (isspace(c) && !quote) {
212 if (cf->value.len)
213 space++;
214 continue;
215 }
216 if (!quote) {
217 if (c == ';' || c == '#') {
218 comment = 1;
219 continue;
220 }
221 }
222 for (; space; space--)
223 strbuf_addch(&cf->value, ' ');
224 if (c == '\\') {
225 c = get_next_char();
226 switch (c) {
227 case '\n':
228 continue;
229 case 't':
230 c = '\t';
231 break;
232 case 'b':
233 c = '\b';
234 break;
235 case 'n':
236 c = '\n';
237 break;
238 /* Some characters escape as themselves */
239 case '\\': case '"':
240 break;
241 /* Reject unknown escape sequences */
242 default:
243 return NULL;
244 }
245 strbuf_addch(&cf->value, c);
246 continue;
247 }
248 if (c == '"') {
249 quote = 1-quote;
250 continue;
251 }
252 strbuf_addch(&cf->value, c);
253 }
254 }
255
256 static inline int iskeychar(int c)
257 {
258 return isalnum(c) || c == '-';
259 }
260
261 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
262 {
263 int c;
264 char *value;
265
266 /* Get the full name */
267 for (;;) {
268 c = get_next_char();
269 if (cf->eof)
270 break;
271 if (!iskeychar(c))
272 break;
273 strbuf_addch(name, tolower(c));
274 }
275
276 while (c == ' ' || c == '\t')
277 c = get_next_char();
278
279 value = NULL;
280 if (c != '\n') {
281 if (c != '=')
282 return -1;
283 value = parse_value();
284 if (!value)
285 return -1;
286 }
287 return fn(name->buf, value, data);
288 }
289
290 static int get_extended_base_var(struct strbuf *name, int c)
291 {
292 do {
293 if (c == '\n')
294 goto error_incomplete_line;
295 c = get_next_char();
296 } while (isspace(c));
297
298 /* We require the format to be '[base "extension"]' */
299 if (c != '"')
300 return -1;
301 strbuf_addch(name, '.');
302
303 for (;;) {
304 int c = get_next_char();
305 if (c == '\n')
306 goto error_incomplete_line;
307 if (c == '"')
308 break;
309 if (c == '\\') {
310 c = get_next_char();
311 if (c == '\n')
312 goto error_incomplete_line;
313 }
314 strbuf_addch(name, c);
315 }
316
317 /* Final ']' */
318 if (get_next_char() != ']')
319 return -1;
320 return 0;
321 error_incomplete_line:
322 cf->linenr--;
323 return -1;
324 }
325
326 static int get_base_var(struct strbuf *name)
327 {
328 for (;;) {
329 int c = get_next_char();
330 if (cf->eof)
331 return -1;
332 if (c == ']')
333 return 0;
334 if (isspace(c))
335 return get_extended_base_var(name, c);
336 if (!iskeychar(c) && c != '.')
337 return -1;
338 strbuf_addch(name, tolower(c));
339 }
340 }
341
342 static int git_parse_file(config_fn_t fn, void *data)
343 {
344 int comment = 0;
345 int baselen = 0;
346 struct strbuf *var = &cf->var;
347
348 /* U+FEFF Byte Order Mark in UTF8 */
349 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
350 const unsigned char *bomptr = utf8_bom;
351
352 for (;;) {
353 int c = get_next_char();
354 if (bomptr && *bomptr) {
355 /* We are at the file beginning; skip UTF8-encoded BOM
356 * if present. Sane editors won't put this in on their
357 * own, but e.g. Windows Notepad will do it happily. */
358 if ((unsigned char) c == *bomptr) {
359 bomptr++;
360 continue;
361 } else {
362 /* Do not tolerate partial BOM. */
363 if (bomptr != utf8_bom)
364 break;
365 /* No BOM at file beginning. Cool. */
366 bomptr = NULL;
367 }
368 }
369 if (c == '\n') {
370 if (cf->eof)
371 return 0;
372 comment = 0;
373 continue;
374 }
375 if (comment || isspace(c))
376 continue;
377 if (c == '#' || c == ';') {
378 comment = 1;
379 continue;
380 }
381 if (c == '[') {
382 /* Reset prior to determining a new stem */
383 strbuf_reset(var);
384 if (get_base_var(var) < 0 || var->len < 1)
385 break;
386 strbuf_addch(var, '.');
387 baselen = var->len;
388 continue;
389 }
390 if (!isalpha(c))
391 break;
392 /*
393 * Truncate the var name back to the section header
394 * stem prior to grabbing the suffix part of the name
395 * and the value.
396 */
397 strbuf_setlen(var, baselen);
398 strbuf_addch(var, tolower(c));
399 if (get_value(fn, data, var) < 0)
400 break;
401 }
402 die("bad config file line %d in %s", cf->linenr, cf->name);
403 }
404
405 static int parse_unit_factor(const char *end, uintmax_t *val)
406 {
407 if (!*end)
408 return 1;
409 else if (!strcasecmp(end, "k")) {
410 *val *= 1024;
411 return 1;
412 }
413 else if (!strcasecmp(end, "m")) {
414 *val *= 1024 * 1024;
415 return 1;
416 }
417 else if (!strcasecmp(end, "g")) {
418 *val *= 1024 * 1024 * 1024;
419 return 1;
420 }
421 return 0;
422 }
423
424 static int git_parse_long(const char *value, long *ret)
425 {
426 if (value && *value) {
427 char *end;
428 intmax_t val;
429 uintmax_t uval;
430 uintmax_t factor = 1;
431
432 errno = 0;
433 val = strtoimax(value, &end, 0);
434 if (errno == ERANGE)
435 return 0;
436 if (!parse_unit_factor(end, &factor))
437 return 0;
438 uval = abs(val);
439 uval *= factor;
440 if ((uval > maximum_signed_value_of_type(long)) ||
441 (abs(val) > uval))
442 return 0;
443 val *= factor;
444 *ret = val;
445 return 1;
446 }
447 return 0;
448 }
449
450 int git_parse_ulong(const char *value, unsigned long *ret)
451 {
452 if (value && *value) {
453 char *end;
454 uintmax_t val;
455 uintmax_t oldval;
456
457 errno = 0;
458 val = strtoumax(value, &end, 0);
459 if (errno == ERANGE)
460 return 0;
461 oldval = val;
462 if (!parse_unit_factor(end, &val))
463 return 0;
464 if ((val > maximum_unsigned_value_of_type(long)) ||
465 (oldval > val))
466 return 0;
467 *ret = val;
468 return 1;
469 }
470 return 0;
471 }
472
473 static void die_bad_config(const char *name)
474 {
475 if (cf && cf->name)
476 die("bad config value for '%s' in %s", name, cf->name);
477 die("bad config value for '%s'", name);
478 }
479
480 int git_config_int(const char *name, const char *value)
481 {
482 long ret = 0;
483 if (!git_parse_long(value, &ret))
484 die_bad_config(name);
485 return ret;
486 }
487
488 unsigned long git_config_ulong(const char *name, const char *value)
489 {
490 unsigned long ret;
491 if (!git_parse_ulong(value, &ret))
492 die_bad_config(name);
493 return ret;
494 }
495
496 static int git_config_maybe_bool_text(const char *name, const char *value)
497 {
498 if (!value)
499 return 1;
500 if (!*value)
501 return 0;
502 if (!strcasecmp(value, "true")
503 || !strcasecmp(value, "yes")
504 || !strcasecmp(value, "on"))
505 return 1;
506 if (!strcasecmp(value, "false")
507 || !strcasecmp(value, "no")
508 || !strcasecmp(value, "off"))
509 return 0;
510 return -1;
511 }
512
513 int git_config_maybe_bool(const char *name, const char *value)
514 {
515 long v = git_config_maybe_bool_text(name, value);
516 if (0 <= v)
517 return v;
518 if (git_parse_long(value, &v))
519 return !!v;
520 return -1;
521 }
522
523 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
524 {
525 int v = git_config_maybe_bool_text(name, value);
526 if (0 <= v) {
527 *is_bool = 1;
528 return v;
529 }
530 *is_bool = 0;
531 return git_config_int(name, value);
532 }
533
534 int git_config_bool(const char *name, const char *value)
535 {
536 int discard;
537 return !!git_config_bool_or_int(name, value, &discard);
538 }
539
540 int git_config_string(const char **dest, const char *var, const char *value)
541 {
542 if (!value)
543 return config_error_nonbool(var);
544 *dest = xstrdup(value);
545 return 0;
546 }
547
548 int git_config_pathname(const char **dest, const char *var, const char *value)
549 {
550 if (!value)
551 return config_error_nonbool(var);
552 *dest = expand_user_path(value);
553 if (!*dest)
554 die("Failed to expand user dir in: '%s'", value);
555 return 0;
556 }
557
558 static int git_default_core_config(const char *var, const char *value)
559 {
560 /* This needs a better name */
561 if (!strcmp(var, "core.filemode")) {
562 trust_executable_bit = git_config_bool(var, value);
563 return 0;
564 }
565 if (!strcmp(var, "core.trustctime")) {
566 trust_ctime = git_config_bool(var, value);
567 return 0;
568 }
569
570 if (!strcmp(var, "core.quotepath")) {
571 quote_path_fully = git_config_bool(var, value);
572 return 0;
573 }
574
575 if (!strcmp(var, "core.symlinks")) {
576 has_symlinks = git_config_bool(var, value);
577 return 0;
578 }
579
580 if (!strcmp(var, "core.ignorecase")) {
581 ignore_case = git_config_bool(var, value);
582 return 0;
583 }
584
585 if (!strcmp(var, "core.attributesfile"))
586 return git_config_pathname(&git_attributes_file, var, value);
587
588 if (!strcmp(var, "core.bare")) {
589 is_bare_repository_cfg = git_config_bool(var, value);
590 return 0;
591 }
592
593 if (!strcmp(var, "core.ignorestat")) {
594 assume_unchanged = git_config_bool(var, value);
595 return 0;
596 }
597
598 if (!strcmp(var, "core.prefersymlinkrefs")) {
599 prefer_symlink_refs = git_config_bool(var, value);
600 return 0;
601 }
602
603 if (!strcmp(var, "core.logallrefupdates")) {
604 log_all_ref_updates = git_config_bool(var, value);
605 return 0;
606 }
607
608 if (!strcmp(var, "core.warnambiguousrefs")) {
609 warn_ambiguous_refs = git_config_bool(var, value);
610 return 0;
611 }
612
613 if (!strcmp(var, "core.abbrev")) {
614 int abbrev = git_config_int(var, value);
615 if (abbrev < minimum_abbrev || abbrev > 40)
616 return -1;
617 default_abbrev = abbrev;
618 return 0;
619 }
620
621 if (!strcmp(var, "core.loosecompression")) {
622 int level = git_config_int(var, value);
623 if (level == -1)
624 level = Z_DEFAULT_COMPRESSION;
625 else if (level < 0 || level > Z_BEST_COMPRESSION)
626 die("bad zlib compression level %d", level);
627 zlib_compression_level = level;
628 zlib_compression_seen = 1;
629 return 0;
630 }
631
632 if (!strcmp(var, "core.compression")) {
633 int level = git_config_int(var, value);
634 if (level == -1)
635 level = Z_DEFAULT_COMPRESSION;
636 else if (level < 0 || level > Z_BEST_COMPRESSION)
637 die("bad zlib compression level %d", level);
638 core_compression_level = level;
639 core_compression_seen = 1;
640 if (!zlib_compression_seen)
641 zlib_compression_level = level;
642 return 0;
643 }
644
645 if (!strcmp(var, "core.packedgitwindowsize")) {
646 int pgsz_x2 = getpagesize() * 2;
647 packed_git_window_size = git_config_ulong(var, value);
648
649 /* This value must be multiple of (pagesize * 2) */
650 packed_git_window_size /= pgsz_x2;
651 if (packed_git_window_size < 1)
652 packed_git_window_size = 1;
653 packed_git_window_size *= pgsz_x2;
654 return 0;
655 }
656
657 if (!strcmp(var, "core.bigfilethreshold")) {
658 big_file_threshold = git_config_ulong(var, value);
659 return 0;
660 }
661
662 if (!strcmp(var, "core.packedgitlimit")) {
663 packed_git_limit = git_config_ulong(var, value);
664 return 0;
665 }
666
667 if (!strcmp(var, "core.deltabasecachelimit")) {
668 delta_base_cache_limit = git_config_ulong(var, value);
669 return 0;
670 }
671
672 if (!strcmp(var, "core.logpackaccess"))
673 return git_config_string(&log_pack_access, var, value);
674
675 if (!strcmp(var, "core.autocrlf")) {
676 if (value && !strcasecmp(value, "input")) {
677 if (core_eol == EOL_CRLF)
678 return error("core.autocrlf=input conflicts with core.eol=crlf");
679 auto_crlf = AUTO_CRLF_INPUT;
680 return 0;
681 }
682 auto_crlf = git_config_bool(var, value);
683 return 0;
684 }
685
686 if (!strcmp(var, "core.safecrlf")) {
687 if (value && !strcasecmp(value, "warn")) {
688 safe_crlf = SAFE_CRLF_WARN;
689 return 0;
690 }
691 safe_crlf = git_config_bool(var, value);
692 return 0;
693 }
694
695 if (!strcmp(var, "core.eol")) {
696 if (value && !strcasecmp(value, "lf"))
697 core_eol = EOL_LF;
698 else if (value && !strcasecmp(value, "crlf"))
699 core_eol = EOL_CRLF;
700 else if (value && !strcasecmp(value, "native"))
701 core_eol = EOL_NATIVE;
702 else
703 core_eol = EOL_UNSET;
704 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
705 return error("core.autocrlf=input conflicts with core.eol=crlf");
706 return 0;
707 }
708
709 if (!strcmp(var, "core.notesref")) {
710 notes_ref_name = xstrdup(value);
711 return 0;
712 }
713
714 if (!strcmp(var, "core.pager"))
715 return git_config_string(&pager_program, var, value);
716
717 if (!strcmp(var, "core.editor"))
718 return git_config_string(&editor_program, var, value);
719
720 if (!strcmp(var, "core.commentchar")) {
721 const char *comment;
722 int ret = git_config_string(&comment, var, value);
723 if (!ret)
724 comment_line_char = comment[0];
725 return ret;
726 }
727
728 if (!strcmp(var, "core.askpass"))
729 return git_config_string(&askpass_program, var, value);
730
731 if (!strcmp(var, "core.excludesfile"))
732 return git_config_pathname(&excludes_file, var, value);
733
734 if (!strcmp(var, "core.whitespace")) {
735 if (!value)
736 return config_error_nonbool(var);
737 whitespace_rule_cfg = parse_whitespace_rule(value);
738 return 0;
739 }
740
741 if (!strcmp(var, "core.fsyncobjectfiles")) {
742 fsync_object_files = git_config_bool(var, value);
743 return 0;
744 }
745
746 if (!strcmp(var, "core.preloadindex")) {
747 core_preload_index = git_config_bool(var, value);
748 return 0;
749 }
750
751 if (!strcmp(var, "core.createobject")) {
752 if (!strcmp(value, "rename"))
753 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
754 else if (!strcmp(value, "link"))
755 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
756 else
757 die("Invalid mode for object creation: %s", value);
758 return 0;
759 }
760
761 if (!strcmp(var, "core.sparsecheckout")) {
762 core_apply_sparse_checkout = git_config_bool(var, value);
763 return 0;
764 }
765
766 if (!strcmp(var, "core.precomposeunicode")) {
767 precomposed_unicode = git_config_bool(var, value);
768 return 0;
769 }
770
771 /* Add other config variables here and to Documentation/config.txt. */
772 return 0;
773 }
774
775 static int git_default_i18n_config(const char *var, const char *value)
776 {
777 if (!strcmp(var, "i18n.commitencoding"))
778 return git_config_string(&git_commit_encoding, var, value);
779
780 if (!strcmp(var, "i18n.logoutputencoding"))
781 return git_config_string(&git_log_output_encoding, var, value);
782
783 /* Add other config variables here and to Documentation/config.txt. */
784 return 0;
785 }
786
787 static int git_default_branch_config(const char *var, const char *value)
788 {
789 if (!strcmp(var, "branch.autosetupmerge")) {
790 if (value && !strcasecmp(value, "always")) {
791 git_branch_track = BRANCH_TRACK_ALWAYS;
792 return 0;
793 }
794 git_branch_track = git_config_bool(var, value);
795 return 0;
796 }
797 if (!strcmp(var, "branch.autosetuprebase")) {
798 if (!value)
799 return config_error_nonbool(var);
800 else if (!strcmp(value, "never"))
801 autorebase = AUTOREBASE_NEVER;
802 else if (!strcmp(value, "local"))
803 autorebase = AUTOREBASE_LOCAL;
804 else if (!strcmp(value, "remote"))
805 autorebase = AUTOREBASE_REMOTE;
806 else if (!strcmp(value, "always"))
807 autorebase = AUTOREBASE_ALWAYS;
808 else
809 return error("Malformed value for %s", var);
810 return 0;
811 }
812
813 /* Add other config variables here and to Documentation/config.txt. */
814 return 0;
815 }
816
817 static int git_default_push_config(const char *var, const char *value)
818 {
819 if (!strcmp(var, "push.default")) {
820 if (!value)
821 return config_error_nonbool(var);
822 else if (!strcmp(value, "nothing"))
823 push_default = PUSH_DEFAULT_NOTHING;
824 else if (!strcmp(value, "matching"))
825 push_default = PUSH_DEFAULT_MATCHING;
826 else if (!strcmp(value, "simple"))
827 push_default = PUSH_DEFAULT_SIMPLE;
828 else if (!strcmp(value, "upstream"))
829 push_default = PUSH_DEFAULT_UPSTREAM;
830 else if (!strcmp(value, "tracking")) /* deprecated */
831 push_default = PUSH_DEFAULT_UPSTREAM;
832 else if (!strcmp(value, "current"))
833 push_default = PUSH_DEFAULT_CURRENT;
834 else {
835 error("Malformed value for %s: %s", var, value);
836 return error("Must be one of nothing, matching, simple, "
837 "upstream or current.");
838 }
839 return 0;
840 }
841
842 /* Add other config variables here and to Documentation/config.txt. */
843 return 0;
844 }
845
846 static int git_default_mailmap_config(const char *var, const char *value)
847 {
848 if (!strcmp(var, "mailmap.file"))
849 return git_config_string(&git_mailmap_file, var, value);
850 if (!strcmp(var, "mailmap.blob"))
851 return git_config_string(&git_mailmap_blob, var, value);
852
853 /* Add other config variables here and to Documentation/config.txt. */
854 return 0;
855 }
856
857 int git_default_config(const char *var, const char *value, void *dummy)
858 {
859 if (!prefixcmp(var, "core."))
860 return git_default_core_config(var, value);
861
862 if (!prefixcmp(var, "user."))
863 return git_ident_config(var, value, dummy);
864
865 if (!prefixcmp(var, "i18n."))
866 return git_default_i18n_config(var, value);
867
868 if (!prefixcmp(var, "branch."))
869 return git_default_branch_config(var, value);
870
871 if (!prefixcmp(var, "push."))
872 return git_default_push_config(var, value);
873
874 if (!prefixcmp(var, "mailmap."))
875 return git_default_mailmap_config(var, value);
876
877 if (!prefixcmp(var, "advice."))
878 return git_default_advice_config(var, value);
879
880 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
881 pager_use_color = git_config_bool(var,value);
882 return 0;
883 }
884
885 if (!strcmp(var, "pack.packsizelimit")) {
886 pack_size_limit_cfg = git_config_ulong(var, value);
887 return 0;
888 }
889 /* Add other config variables here and to Documentation/config.txt. */
890 return 0;
891 }
892
893 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
894 {
895 int ret;
896 FILE *f = fopen(filename, "r");
897
898 ret = -1;
899 if (f) {
900 config_file top;
901
902 /* push config-file parsing state stack */
903 top.prev = cf;
904 top.f = f;
905 top.name = filename;
906 top.linenr = 1;
907 top.eof = 0;
908 strbuf_init(&top.value, 1024);
909 strbuf_init(&top.var, 1024);
910 cf = &top;
911
912 ret = git_parse_file(fn, data);
913
914 /* pop config-file parsing state stack */
915 strbuf_release(&top.value);
916 strbuf_release(&top.var);
917 cf = top.prev;
918
919 fclose(f);
920 }
921 return ret;
922 }
923
924 const char *git_etc_gitconfig(void)
925 {
926 static const char *system_wide;
927 if (!system_wide)
928 system_wide = system_path(ETC_GITCONFIG);
929 return system_wide;
930 }
931
932 int git_env_bool(const char *k, int def)
933 {
934 const char *v = getenv(k);
935 return v ? git_config_bool(k, v) : def;
936 }
937
938 int git_config_system(void)
939 {
940 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
941 }
942
943 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
944 {
945 int ret = 0, found = 0;
946 char *xdg_config = NULL;
947 char *user_config = NULL;
948
949 home_config_paths(&user_config, &xdg_config, "config");
950
951 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK)) {
952 ret += git_config_from_file(fn, git_etc_gitconfig(),
953 data);
954 found += 1;
955 }
956
957 if (xdg_config && !access_or_die(xdg_config, R_OK)) {
958 ret += git_config_from_file(fn, xdg_config, data);
959 found += 1;
960 }
961
962 if (user_config && !access_or_die(user_config, R_OK)) {
963 ret += git_config_from_file(fn, user_config, data);
964 found += 1;
965 }
966
967 if (repo_config && !access_or_die(repo_config, R_OK)) {
968 ret += git_config_from_file(fn, repo_config, data);
969 found += 1;
970 }
971
972 switch (git_config_from_parameters(fn, data)) {
973 case -1: /* error */
974 die("unable to parse command-line config");
975 break;
976 case 0: /* found nothing */
977 break;
978 default: /* found at least one item */
979 found++;
980 break;
981 }
982
983 free(xdg_config);
984 free(user_config);
985 return ret == 0 ? found : ret;
986 }
987
988 int git_config_with_options(config_fn_t fn, void *data,
989 const char *filename, int respect_includes)
990 {
991 char *repo_config = NULL;
992 int ret;
993 struct config_include_data inc = CONFIG_INCLUDE_INIT;
994
995 if (respect_includes) {
996 inc.fn = fn;
997 inc.data = data;
998 fn = git_config_include;
999 data = &inc;
1000 }
1001
1002 /*
1003 * If we have a specific filename, use it. Otherwise, follow the
1004 * regular lookup sequence.
1005 */
1006 if (filename)
1007 return git_config_from_file(fn, filename, data);
1008
1009 repo_config = git_pathdup("config");
1010 ret = git_config_early(fn, data, repo_config);
1011 if (repo_config)
1012 free(repo_config);
1013 return ret;
1014 }
1015
1016 int git_config(config_fn_t fn, void *data)
1017 {
1018 return git_config_with_options(fn, data, NULL, 1);
1019 }
1020
1021 /*
1022 * Find all the stuff for git_config_set() below.
1023 */
1024
1025 #define MAX_MATCHES 512
1026
1027 static struct {
1028 int baselen;
1029 char *key;
1030 int do_not_match;
1031 regex_t *value_regex;
1032 int multi_replace;
1033 size_t offset[MAX_MATCHES];
1034 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1035 int seen;
1036 } store;
1037
1038 static int matches(const char *key, const char *value)
1039 {
1040 return !strcmp(key, store.key) &&
1041 (store.value_regex == NULL ||
1042 (store.do_not_match ^
1043 !regexec(store.value_regex, value, 0, NULL, 0)));
1044 }
1045
1046 static int store_aux(const char *key, const char *value, void *cb)
1047 {
1048 const char *ep;
1049 size_t section_len;
1050 FILE *f = cf->f;
1051
1052 switch (store.state) {
1053 case KEY_SEEN:
1054 if (matches(key, value)) {
1055 if (store.seen == 1 && store.multi_replace == 0) {
1056 warning("%s has multiple values", key);
1057 } else if (store.seen >= MAX_MATCHES) {
1058 error("too many matches for %s", key);
1059 return 1;
1060 }
1061
1062 store.offset[store.seen] = ftell(f);
1063 store.seen++;
1064 }
1065 break;
1066 case SECTION_SEEN:
1067 /*
1068 * What we are looking for is in store.key (both
1069 * section and var), and its section part is baselen
1070 * long. We found key (again, both section and var).
1071 * We would want to know if this key is in the same
1072 * section as what we are looking for. We already
1073 * know we are in the same section as what should
1074 * hold store.key.
1075 */
1076 ep = strrchr(key, '.');
1077 section_len = ep - key;
1078
1079 if ((section_len != store.baselen) ||
1080 memcmp(key, store.key, section_len+1)) {
1081 store.state = SECTION_END_SEEN;
1082 break;
1083 }
1084
1085 /*
1086 * Do not increment matches: this is no match, but we
1087 * just made sure we are in the desired section.
1088 */
1089 store.offset[store.seen] = ftell(f);
1090 /* fallthru */
1091 case SECTION_END_SEEN:
1092 case START:
1093 if (matches(key, value)) {
1094 store.offset[store.seen] = ftell(f);
1095 store.state = KEY_SEEN;
1096 store.seen++;
1097 } else {
1098 if (strrchr(key, '.') - key == store.baselen &&
1099 !strncmp(key, store.key, store.baselen)) {
1100 store.state = SECTION_SEEN;
1101 store.offset[store.seen] = ftell(f);
1102 }
1103 }
1104 }
1105 return 0;
1106 }
1107
1108 static int write_error(const char *filename)
1109 {
1110 error("failed to write new configuration file %s", filename);
1111
1112 /* Same error code as "failed to rename". */
1113 return 4;
1114 }
1115
1116 static int store_write_section(int fd, const char *key)
1117 {
1118 const char *dot;
1119 int i, success;
1120 struct strbuf sb = STRBUF_INIT;
1121
1122 dot = memchr(key, '.', store.baselen);
1123 if (dot) {
1124 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1125 for (i = dot - key + 1; i < store.baselen; i++) {
1126 if (key[i] == '"' || key[i] == '\\')
1127 strbuf_addch(&sb, '\\');
1128 strbuf_addch(&sb, key[i]);
1129 }
1130 strbuf_addstr(&sb, "\"]\n");
1131 } else {
1132 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1133 }
1134
1135 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1136 strbuf_release(&sb);
1137
1138 return success;
1139 }
1140
1141 static int store_write_pair(int fd, const char *key, const char *value)
1142 {
1143 int i, success;
1144 int length = strlen(key + store.baselen + 1);
1145 const char *quote = "";
1146 struct strbuf sb = STRBUF_INIT;
1147
1148 /*
1149 * Check to see if the value needs to be surrounded with a dq pair.
1150 * Note that problematic characters are always backslash-quoted; this
1151 * check is about not losing leading or trailing SP and strings that
1152 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1153 * configuration parser.
1154 */
1155 if (value[0] == ' ')
1156 quote = "\"";
1157 for (i = 0; value[i]; i++)
1158 if (value[i] == ';' || value[i] == '#')
1159 quote = "\"";
1160 if (i && value[i - 1] == ' ')
1161 quote = "\"";
1162
1163 strbuf_addf(&sb, "\t%.*s = %s",
1164 length, key + store.baselen + 1, quote);
1165
1166 for (i = 0; value[i]; i++)
1167 switch (value[i]) {
1168 case '\n':
1169 strbuf_addstr(&sb, "\\n");
1170 break;
1171 case '\t':
1172 strbuf_addstr(&sb, "\\t");
1173 break;
1174 case '"':
1175 case '\\':
1176 strbuf_addch(&sb, '\\');
1177 default:
1178 strbuf_addch(&sb, value[i]);
1179 break;
1180 }
1181 strbuf_addf(&sb, "%s\n", quote);
1182
1183 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1184 strbuf_release(&sb);
1185
1186 return success;
1187 }
1188
1189 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1190 size_t offset_, int *found_bracket)
1191 {
1192 size_t equal_offset = size, bracket_offset = size;
1193 ssize_t offset;
1194
1195 contline:
1196 for (offset = offset_-2; offset > 0
1197 && contents[offset] != '\n'; offset--)
1198 switch (contents[offset]) {
1199 case '=': equal_offset = offset; break;
1200 case ']': bracket_offset = offset; break;
1201 }
1202 if (offset > 0 && contents[offset-1] == '\\') {
1203 offset_ = offset;
1204 goto contline;
1205 }
1206 if (bracket_offset < equal_offset) {
1207 *found_bracket = 1;
1208 offset = bracket_offset+1;
1209 } else
1210 offset++;
1211
1212 return offset;
1213 }
1214
1215 int git_config_set_in_file(const char *config_filename,
1216 const char *key, const char *value)
1217 {
1218 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1219 }
1220
1221 int git_config_set(const char *key, const char *value)
1222 {
1223 return git_config_set_multivar(key, value, NULL, 0);
1224 }
1225
1226 /*
1227 * Auxiliary function to sanity-check and split the key into the section
1228 * identifier and variable name.
1229 *
1230 * Returns 0 on success, -1 when there is an invalid character in the key and
1231 * -2 if there is no section name in the key.
1232 *
1233 * store_key - pointer to char* which will hold a copy of the key with
1234 * lowercase section and variable name
1235 * baselen - pointer to int which will hold the length of the
1236 * section + subsection part, can be NULL
1237 */
1238 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1239 {
1240 int i, dot, baselen;
1241 const char *last_dot = strrchr(key, '.');
1242
1243 /*
1244 * Since "key" actually contains the section name and the real
1245 * key name separated by a dot, we have to know where the dot is.
1246 */
1247
1248 if (last_dot == NULL || last_dot == key) {
1249 error("key does not contain a section: %s", key);
1250 return -CONFIG_NO_SECTION_OR_NAME;
1251 }
1252
1253 if (!last_dot[1]) {
1254 error("key does not contain variable name: %s", key);
1255 return -CONFIG_NO_SECTION_OR_NAME;
1256 }
1257
1258 baselen = last_dot - key;
1259 if (baselen_)
1260 *baselen_ = baselen;
1261
1262 /*
1263 * Validate the key and while at it, lower case it for matching.
1264 */
1265 *store_key = xmalloc(strlen(key) + 1);
1266
1267 dot = 0;
1268 for (i = 0; key[i]; i++) {
1269 unsigned char c = key[i];
1270 if (c == '.')
1271 dot = 1;
1272 /* Leave the extended basename untouched.. */
1273 if (!dot || i > baselen) {
1274 if (!iskeychar(c) ||
1275 (i == baselen + 1 && !isalpha(c))) {
1276 error("invalid key: %s", key);
1277 goto out_free_ret_1;
1278 }
1279 c = tolower(c);
1280 } else if (c == '\n') {
1281 error("invalid key (newline): %s", key);
1282 goto out_free_ret_1;
1283 }
1284 (*store_key)[i] = c;
1285 }
1286 (*store_key)[i] = 0;
1287
1288 return 0;
1289
1290 out_free_ret_1:
1291 free(*store_key);
1292 *store_key = NULL;
1293 return -CONFIG_INVALID_KEY;
1294 }
1295
1296 /*
1297 * If value==NULL, unset in (remove from) config,
1298 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1299 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1300 * else all matching key/values (regardless how many) are removed,
1301 * before the new pair is written.
1302 *
1303 * Returns 0 on success.
1304 *
1305 * This function does this:
1306 *
1307 * - it locks the config file by creating ".git/config.lock"
1308 *
1309 * - it then parses the config using store_aux() as validator to find
1310 * the position on the key/value pair to replace. If it is to be unset,
1311 * it must be found exactly once.
1312 *
1313 * - the config file is mmap()ed and the part before the match (if any) is
1314 * written to the lock file, then the changed part and the rest.
1315 *
1316 * - the config file is removed and the lock file rename()d to it.
1317 *
1318 */
1319 int git_config_set_multivar_in_file(const char *config_filename,
1320 const char *key, const char *value,
1321 const char *value_regex, int multi_replace)
1322 {
1323 int fd = -1, in_fd;
1324 int ret;
1325 struct lock_file *lock = NULL;
1326 char *filename_buf = NULL;
1327
1328 /* parse-key returns negative; flip the sign to feed exit(3) */
1329 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1330 if (ret)
1331 goto out_free;
1332
1333 store.multi_replace = multi_replace;
1334
1335 if (!config_filename)
1336 config_filename = filename_buf = git_pathdup("config");
1337
1338 /*
1339 * The lock serves a purpose in addition to locking: the new
1340 * contents of .git/config will be written into it.
1341 */
1342 lock = xcalloc(sizeof(struct lock_file), 1);
1343 fd = hold_lock_file_for_update(lock, config_filename, 0);
1344 if (fd < 0) {
1345 error("could not lock config file %s: %s", config_filename, strerror(errno));
1346 free(store.key);
1347 ret = CONFIG_NO_LOCK;
1348 goto out_free;
1349 }
1350
1351 /*
1352 * If .git/config does not exist yet, write a minimal version.
1353 */
1354 in_fd = open(config_filename, O_RDONLY);
1355 if ( in_fd < 0 ) {
1356 free(store.key);
1357
1358 if ( ENOENT != errno ) {
1359 error("opening %s: %s", config_filename,
1360 strerror(errno));
1361 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1362 goto out_free;
1363 }
1364 /* if nothing to unset, error out */
1365 if (value == NULL) {
1366 ret = CONFIG_NOTHING_SET;
1367 goto out_free;
1368 }
1369
1370 store.key = (char *)key;
1371 if (!store_write_section(fd, key) ||
1372 !store_write_pair(fd, key, value))
1373 goto write_err_out;
1374 } else {
1375 struct stat st;
1376 char *contents;
1377 size_t contents_sz, copy_begin, copy_end;
1378 int i, new_line = 0;
1379
1380 if (value_regex == NULL)
1381 store.value_regex = NULL;
1382 else {
1383 if (value_regex[0] == '!') {
1384 store.do_not_match = 1;
1385 value_regex++;
1386 } else
1387 store.do_not_match = 0;
1388
1389 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1390 if (regcomp(store.value_regex, value_regex,
1391 REG_EXTENDED)) {
1392 error("invalid pattern: %s", value_regex);
1393 free(store.value_regex);
1394 ret = CONFIG_INVALID_PATTERN;
1395 goto out_free;
1396 }
1397 }
1398
1399 store.offset[0] = 0;
1400 store.state = START;
1401 store.seen = 0;
1402
1403 /*
1404 * After this, store.offset will contain the *end* offset
1405 * of the last match, or remain at 0 if no match was found.
1406 * As a side effect, we make sure to transform only a valid
1407 * existing config file.
1408 */
1409 if (git_config_from_file(store_aux, config_filename, NULL)) {
1410 error("invalid config file %s", config_filename);
1411 free(store.key);
1412 if (store.value_regex != NULL) {
1413 regfree(store.value_regex);
1414 free(store.value_regex);
1415 }
1416 ret = CONFIG_INVALID_FILE;
1417 goto out_free;
1418 }
1419
1420 free(store.key);
1421 if (store.value_regex != NULL) {
1422 regfree(store.value_regex);
1423 free(store.value_regex);
1424 }
1425
1426 /* if nothing to unset, or too many matches, error out */
1427 if ((store.seen == 0 && value == NULL) ||
1428 (store.seen > 1 && multi_replace == 0)) {
1429 ret = CONFIG_NOTHING_SET;
1430 goto out_free;
1431 }
1432
1433 fstat(in_fd, &st);
1434 contents_sz = xsize_t(st.st_size);
1435 contents = xmmap(NULL, contents_sz, PROT_READ,
1436 MAP_PRIVATE, in_fd, 0);
1437 close(in_fd);
1438
1439 if (store.seen == 0)
1440 store.seen = 1;
1441
1442 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1443 if (store.offset[i] == 0) {
1444 store.offset[i] = copy_end = contents_sz;
1445 } else if (store.state != KEY_SEEN) {
1446 copy_end = store.offset[i];
1447 } else
1448 copy_end = find_beginning_of_line(
1449 contents, contents_sz,
1450 store.offset[i]-2, &new_line);
1451
1452 if (copy_end > 0 && contents[copy_end-1] != '\n')
1453 new_line = 1;
1454
1455 /* write the first part of the config */
1456 if (copy_end > copy_begin) {
1457 if (write_in_full(fd, contents + copy_begin,
1458 copy_end - copy_begin) <
1459 copy_end - copy_begin)
1460 goto write_err_out;
1461 if (new_line &&
1462 write_str_in_full(fd, "\n") != 1)
1463 goto write_err_out;
1464 }
1465 copy_begin = store.offset[i];
1466 }
1467
1468 /* write the pair (value == NULL means unset) */
1469 if (value != NULL) {
1470 if (store.state == START) {
1471 if (!store_write_section(fd, key))
1472 goto write_err_out;
1473 }
1474 if (!store_write_pair(fd, key, value))
1475 goto write_err_out;
1476 }
1477
1478 /* write the rest of the config */
1479 if (copy_begin < contents_sz)
1480 if (write_in_full(fd, contents + copy_begin,
1481 contents_sz - copy_begin) <
1482 contents_sz - copy_begin)
1483 goto write_err_out;
1484
1485 munmap(contents, contents_sz);
1486 }
1487
1488 if (commit_lock_file(lock) < 0) {
1489 error("could not commit config file %s", config_filename);
1490 ret = CONFIG_NO_WRITE;
1491 goto out_free;
1492 }
1493
1494 /*
1495 * lock is committed, so don't try to roll it back below.
1496 * NOTE: Since lockfile.c keeps a linked list of all created
1497 * lock_file structures, it isn't safe to free(lock). It's
1498 * better to just leave it hanging around.
1499 */
1500 lock = NULL;
1501 ret = 0;
1502
1503 out_free:
1504 if (lock)
1505 rollback_lock_file(lock);
1506 free(filename_buf);
1507 return ret;
1508
1509 write_err_out:
1510 ret = write_error(lock->filename);
1511 goto out_free;
1512
1513 }
1514
1515 int git_config_set_multivar(const char *key, const char *value,
1516 const char *value_regex, int multi_replace)
1517 {
1518 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1519 multi_replace);
1520 }
1521
1522 static int section_name_match (const char *buf, const char *name)
1523 {
1524 int i = 0, j = 0, dot = 0;
1525 if (buf[i] != '[')
1526 return 0;
1527 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1528 if (!dot && isspace(buf[i])) {
1529 dot = 1;
1530 if (name[j++] != '.')
1531 break;
1532 for (i++; isspace(buf[i]); i++)
1533 ; /* do nothing */
1534 if (buf[i] != '"')
1535 break;
1536 continue;
1537 }
1538 if (buf[i] == '\\' && dot)
1539 i++;
1540 else if (buf[i] == '"' && dot) {
1541 for (i++; isspace(buf[i]); i++)
1542 ; /* do_nothing */
1543 break;
1544 }
1545 if (buf[i] != name[j++])
1546 break;
1547 }
1548 if (buf[i] == ']' && name[j] == 0) {
1549 /*
1550 * We match, now just find the right length offset by
1551 * gobbling up any whitespace after it, as well
1552 */
1553 i++;
1554 for (; buf[i] && isspace(buf[i]); i++)
1555 ; /* do nothing */
1556 return i;
1557 }
1558 return 0;
1559 }
1560
1561 static int section_name_is_ok(const char *name)
1562 {
1563 /* Empty section names are bogus. */
1564 if (!*name)
1565 return 0;
1566
1567 /*
1568 * Before a dot, we must be alphanumeric or dash. After the first dot,
1569 * anything goes, so we can stop checking.
1570 */
1571 for (; *name && *name != '.'; name++)
1572 if (*name != '-' && !isalnum(*name))
1573 return 0;
1574 return 1;
1575 }
1576
1577 /* if new_name == NULL, the section is removed instead */
1578 int git_config_rename_section_in_file(const char *config_filename,
1579 const char *old_name, const char *new_name)
1580 {
1581 int ret = 0, remove = 0;
1582 char *filename_buf = NULL;
1583 struct lock_file *lock;
1584 int out_fd;
1585 char buf[1024];
1586 FILE *config_file;
1587
1588 if (new_name && !section_name_is_ok(new_name)) {
1589 ret = error("invalid section name: %s", new_name);
1590 goto out;
1591 }
1592
1593 if (!config_filename)
1594 config_filename = filename_buf = git_pathdup("config");
1595
1596 lock = xcalloc(sizeof(struct lock_file), 1);
1597 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1598 if (out_fd < 0) {
1599 ret = error("could not lock config file %s", config_filename);
1600 goto out;
1601 }
1602
1603 if (!(config_file = fopen(config_filename, "rb"))) {
1604 /* no config file means nothing to rename, no error */
1605 goto unlock_and_out;
1606 }
1607
1608 while (fgets(buf, sizeof(buf), config_file)) {
1609 int i;
1610 int length;
1611 char *output = buf;
1612 for (i = 0; buf[i] && isspace(buf[i]); i++)
1613 ; /* do nothing */
1614 if (buf[i] == '[') {
1615 /* it's a section */
1616 int offset = section_name_match(&buf[i], old_name);
1617 if (offset > 0) {
1618 ret++;
1619 if (new_name == NULL) {
1620 remove = 1;
1621 continue;
1622 }
1623 store.baselen = strlen(new_name);
1624 if (!store_write_section(out_fd, new_name)) {
1625 ret = write_error(lock->filename);
1626 goto out;
1627 }
1628 /*
1629 * We wrote out the new section, with
1630 * a newline, now skip the old
1631 * section's length
1632 */
1633 output += offset + i;
1634 if (strlen(output) > 0) {
1635 /*
1636 * More content means there's
1637 * a declaration to put on the
1638 * next line; indent with a
1639 * tab
1640 */
1641 output -= 1;
1642 output[0] = '\t';
1643 }
1644 }
1645 remove = 0;
1646 }
1647 if (remove)
1648 continue;
1649 length = strlen(output);
1650 if (write_in_full(out_fd, output, length) != length) {
1651 ret = write_error(lock->filename);
1652 goto out;
1653 }
1654 }
1655 fclose(config_file);
1656 unlock_and_out:
1657 if (commit_lock_file(lock) < 0)
1658 ret = error("could not commit config file %s", config_filename);
1659 out:
1660 free(filename_buf);
1661 return ret;
1662 }
1663
1664 int git_config_rename_section(const char *old_name, const char *new_name)
1665 {
1666 return git_config_rename_section_in_file(NULL, old_name, new_name);
1667 }
1668
1669 /*
1670 * Call this to report error for your variable that should not
1671 * get a boolean value (i.e. "[my] var" means "true").
1672 */
1673 #undef config_error_nonbool
1674 int config_error_nonbool(const char *var)
1675 {
1676 return error("Missing value for '%s'", var);
1677 }