Merge branch 'ds/commit-graph'
[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 "config.h"
10 #include "repository.h"
11 #include "lockfile.h"
12 #include "exec-cmd.h"
13 #include "strbuf.h"
14 #include "quote.h"
15 #include "hashmap.h"
16 #include "string-list.h"
17 #include "utf8.h"
18 #include "dir.h"
19
20 struct config_source {
21 struct config_source *prev;
22 union {
23 FILE *file;
24 struct config_buf {
25 const char *buf;
26 size_t len;
27 size_t pos;
28 } buf;
29 } u;
30 enum config_origin_type origin_type;
31 const char *name;
32 const char *path;
33 int die_on_error;
34 int linenr;
35 int eof;
36 struct strbuf value;
37 struct strbuf var;
38
39 int (*do_fgetc)(struct config_source *c);
40 int (*do_ungetc)(int c, struct config_source *conf);
41 long (*do_ftell)(struct config_source *c);
42 };
43
44 /*
45 * These variables record the "current" config source, which
46 * can be accessed by parsing callbacks.
47 *
48 * The "cf" variable will be non-NULL only when we are actually parsing a real
49 * config source (file, blob, cmdline, etc).
50 *
51 * The "current_config_kvi" variable will be non-NULL only when we are feeding
52 * cached config from a configset into a callback.
53 *
54 * They should generally never be non-NULL at the same time. If they are both
55 * NULL, then we aren't parsing anything (and depending on the function looking
56 * at the variables, it's either a bug for it to be called in the first place,
57 * or it's a function which can be reused for non-config purposes, and should
58 * fall back to some sane behavior).
59 */
60 static struct config_source *cf;
61 static struct key_value_info *current_config_kvi;
62
63 /*
64 * Similar to the variables above, this gives access to the "scope" of the
65 * current value (repo, global, etc). For cached values, it can be found via
66 * the current_config_kvi as above. During parsing, the current value can be
67 * found in this variable. It's not part of "cf" because it transcends a single
68 * file (i.e., a file included from .git/config is still in "repo" scope).
69 */
70 static enum config_scope current_parsing_scope;
71
72 static int core_compression_seen;
73 static int pack_compression_seen;
74 static int zlib_compression_seen;
75
76 static int config_file_fgetc(struct config_source *conf)
77 {
78 return getc_unlocked(conf->u.file);
79 }
80
81 static int config_file_ungetc(int c, struct config_source *conf)
82 {
83 return ungetc(c, conf->u.file);
84 }
85
86 static long config_file_ftell(struct config_source *conf)
87 {
88 return ftell(conf->u.file);
89 }
90
91
92 static int config_buf_fgetc(struct config_source *conf)
93 {
94 if (conf->u.buf.pos < conf->u.buf.len)
95 return conf->u.buf.buf[conf->u.buf.pos++];
96
97 return EOF;
98 }
99
100 static int config_buf_ungetc(int c, struct config_source *conf)
101 {
102 if (conf->u.buf.pos > 0) {
103 conf->u.buf.pos--;
104 if (conf->u.buf.buf[conf->u.buf.pos] != c)
105 die("BUG: config_buf can only ungetc the same character");
106 return c;
107 }
108
109 return EOF;
110 }
111
112 static long config_buf_ftell(struct config_source *conf)
113 {
114 return conf->u.buf.pos;
115 }
116
117 #define MAX_INCLUDE_DEPTH 10
118 static const char include_depth_advice[] =
119 "exceeded maximum include depth (%d) while including\n"
120 " %s\n"
121 "from\n"
122 " %s\n"
123 "Do you have circular includes?";
124 static int handle_path_include(const char *path, struct config_include_data *inc)
125 {
126 int ret = 0;
127 struct strbuf buf = STRBUF_INIT;
128 char *expanded;
129
130 if (!path)
131 return config_error_nonbool("include.path");
132
133 expanded = expand_user_path(path, 0);
134 if (!expanded)
135 return error("could not expand include path '%s'", path);
136 path = expanded;
137
138 /*
139 * Use an absolute path as-is, but interpret relative paths
140 * based on the including config file.
141 */
142 if (!is_absolute_path(path)) {
143 char *slash;
144
145 if (!cf || !cf->path)
146 return error("relative config includes must come from files");
147
148 slash = find_last_dir_sep(cf->path);
149 if (slash)
150 strbuf_add(&buf, cf->path, slash - cf->path + 1);
151 strbuf_addstr(&buf, path);
152 path = buf.buf;
153 }
154
155 if (!access_or_die(path, R_OK, 0)) {
156 if (++inc->depth > MAX_INCLUDE_DEPTH)
157 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
158 !cf ? "<unknown>" :
159 cf->name ? cf->name :
160 "the command line");
161 ret = git_config_from_file(git_config_include, path, inc);
162 inc->depth--;
163 }
164 strbuf_release(&buf);
165 free(expanded);
166 return ret;
167 }
168
169 static int prepare_include_condition_pattern(struct strbuf *pat)
170 {
171 struct strbuf path = STRBUF_INIT;
172 char *expanded;
173 int prefix = 0;
174
175 expanded = expand_user_path(pat->buf, 1);
176 if (expanded) {
177 strbuf_reset(pat);
178 strbuf_addstr(pat, expanded);
179 free(expanded);
180 }
181
182 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
183 const char *slash;
184
185 if (!cf || !cf->path)
186 return error(_("relative config include "
187 "conditionals must come from files"));
188
189 strbuf_realpath(&path, cf->path, 1);
190 slash = find_last_dir_sep(path.buf);
191 if (!slash)
192 die("BUG: how is this possible?");
193 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
194 prefix = slash - path.buf + 1 /* slash */;
195 } else if (!is_absolute_path(pat->buf))
196 strbuf_insert(pat, 0, "**/", 3);
197
198 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
199 strbuf_addstr(pat, "**");
200
201 strbuf_release(&path);
202 return prefix;
203 }
204
205 static int include_by_gitdir(const struct config_options *opts,
206 const char *cond, size_t cond_len, int icase)
207 {
208 struct strbuf text = STRBUF_INIT;
209 struct strbuf pattern = STRBUF_INIT;
210 int ret = 0, prefix;
211 const char *git_dir;
212 int already_tried_absolute = 0;
213
214 if (opts->git_dir)
215 git_dir = opts->git_dir;
216 else
217 goto done;
218
219 strbuf_realpath(&text, git_dir, 1);
220 strbuf_add(&pattern, cond, cond_len);
221 prefix = prepare_include_condition_pattern(&pattern);
222
223 again:
224 if (prefix < 0)
225 goto done;
226
227 if (prefix > 0) {
228 /*
229 * perform literal matching on the prefix part so that
230 * any wildcard character in it can't create side effects.
231 */
232 if (text.len < prefix)
233 goto done;
234 if (!icase && strncmp(pattern.buf, text.buf, prefix))
235 goto done;
236 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
237 goto done;
238 }
239
240 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
241 icase ? WM_CASEFOLD : 0);
242
243 if (!ret && !already_tried_absolute) {
244 /*
245 * We've tried e.g. matching gitdir:~/work, but if
246 * ~/work is a symlink to /mnt/storage/work
247 * strbuf_realpath() will expand it, so the rule won't
248 * match. Let's match against a
249 * strbuf_add_absolute_path() version of the path,
250 * which'll do the right thing
251 */
252 strbuf_reset(&text);
253 strbuf_add_absolute_path(&text, git_dir);
254 already_tried_absolute = 1;
255 goto again;
256 }
257 done:
258 strbuf_release(&pattern);
259 strbuf_release(&text);
260 return ret;
261 }
262
263 static int include_condition_is_true(const struct config_options *opts,
264 const char *cond, size_t cond_len)
265 {
266
267 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
268 return include_by_gitdir(opts, cond, cond_len, 0);
269 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
270 return include_by_gitdir(opts, cond, cond_len, 1);
271
272 /* unknown conditionals are always false */
273 return 0;
274 }
275
276 int git_config_include(const char *var, const char *value, void *data)
277 {
278 struct config_include_data *inc = data;
279 const char *cond, *key;
280 int cond_len;
281 int ret;
282
283 /*
284 * Pass along all values, including "include" directives; this makes it
285 * possible to query information on the includes themselves.
286 */
287 ret = inc->fn(var, value, inc->data);
288 if (ret < 0)
289 return ret;
290
291 if (!strcmp(var, "include.path"))
292 ret = handle_path_include(value, inc);
293
294 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
295 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
296 !strcmp(key, "path"))
297 ret = handle_path_include(value, inc);
298
299 return ret;
300 }
301
302 void git_config_push_parameter(const char *text)
303 {
304 struct strbuf env = STRBUF_INIT;
305 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
306 if (old && *old) {
307 strbuf_addstr(&env, old);
308 strbuf_addch(&env, ' ');
309 }
310 sq_quote_buf(&env, text);
311 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
312 strbuf_release(&env);
313 }
314
315 static inline int iskeychar(int c)
316 {
317 return isalnum(c) || c == '-';
318 }
319
320 /*
321 * Auxiliary function to sanity-check and split the key into the section
322 * identifier and variable name.
323 *
324 * Returns 0 on success, -1 when there is an invalid character in the key and
325 * -2 if there is no section name in the key.
326 *
327 * store_key - pointer to char* which will hold a copy of the key with
328 * lowercase section and variable name
329 * baselen - pointer to int which will hold the length of the
330 * section + subsection part, can be NULL
331 */
332 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
333 {
334 int i, dot, baselen;
335 const char *last_dot = strrchr(key, '.');
336
337 /*
338 * Since "key" actually contains the section name and the real
339 * key name separated by a dot, we have to know where the dot is.
340 */
341
342 if (last_dot == NULL || last_dot == key) {
343 if (!quiet)
344 error("key does not contain a section: %s", key);
345 return -CONFIG_NO_SECTION_OR_NAME;
346 }
347
348 if (!last_dot[1]) {
349 if (!quiet)
350 error("key does not contain variable name: %s", key);
351 return -CONFIG_NO_SECTION_OR_NAME;
352 }
353
354 baselen = last_dot - key;
355 if (baselen_)
356 *baselen_ = baselen;
357
358 /*
359 * Validate the key and while at it, lower case it for matching.
360 */
361 if (store_key)
362 *store_key = xmallocz(strlen(key));
363
364 dot = 0;
365 for (i = 0; key[i]; i++) {
366 unsigned char c = key[i];
367 if (c == '.')
368 dot = 1;
369 /* Leave the extended basename untouched.. */
370 if (!dot || i > baselen) {
371 if (!iskeychar(c) ||
372 (i == baselen + 1 && !isalpha(c))) {
373 if (!quiet)
374 error("invalid key: %s", key);
375 goto out_free_ret_1;
376 }
377 c = tolower(c);
378 } else if (c == '\n') {
379 if (!quiet)
380 error("invalid key (newline): %s", key);
381 goto out_free_ret_1;
382 }
383 if (store_key)
384 (*store_key)[i] = c;
385 }
386
387 return 0;
388
389 out_free_ret_1:
390 if (store_key) {
391 FREE_AND_NULL(*store_key);
392 }
393 return -CONFIG_INVALID_KEY;
394 }
395
396 int git_config_parse_key(const char *key, char **store_key, int *baselen)
397 {
398 return git_config_parse_key_1(key, store_key, baselen, 0);
399 }
400
401 int git_config_key_is_valid(const char *key)
402 {
403 return !git_config_parse_key_1(key, NULL, NULL, 1);
404 }
405
406 int git_config_parse_parameter(const char *text,
407 config_fn_t fn, void *data)
408 {
409 const char *value;
410 char *canonical_name;
411 struct strbuf **pair;
412 int ret;
413
414 pair = strbuf_split_str(text, '=', 2);
415 if (!pair[0])
416 return error("bogus config parameter: %s", text);
417
418 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
419 strbuf_setlen(pair[0], pair[0]->len - 1);
420 value = pair[1] ? pair[1]->buf : "";
421 } else {
422 value = NULL;
423 }
424
425 strbuf_trim(pair[0]);
426 if (!pair[0]->len) {
427 strbuf_list_free(pair);
428 return error("bogus config parameter: %s", text);
429 }
430
431 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
432 ret = -1;
433 } else {
434 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
435 free(canonical_name);
436 }
437 strbuf_list_free(pair);
438 return ret;
439 }
440
441 int git_config_from_parameters(config_fn_t fn, void *data)
442 {
443 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
444 int ret = 0;
445 char *envw;
446 const char **argv = NULL;
447 int nr = 0, alloc = 0;
448 int i;
449 struct config_source source;
450
451 if (!env)
452 return 0;
453
454 memset(&source, 0, sizeof(source));
455 source.prev = cf;
456 source.origin_type = CONFIG_ORIGIN_CMDLINE;
457 cf = &source;
458
459 /* sq_dequote will write over it */
460 envw = xstrdup(env);
461
462 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
463 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
464 goto out;
465 }
466
467 for (i = 0; i < nr; i++) {
468 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
469 ret = -1;
470 goto out;
471 }
472 }
473
474 out:
475 free(argv);
476 free(envw);
477 cf = source.prev;
478 return ret;
479 }
480
481 static int get_next_char(void)
482 {
483 int c = cf->do_fgetc(cf);
484
485 if (c == '\r') {
486 /* DOS like systems */
487 c = cf->do_fgetc(cf);
488 if (c != '\n') {
489 if (c != EOF)
490 cf->do_ungetc(c, cf);
491 c = '\r';
492 }
493 }
494 if (c == '\n')
495 cf->linenr++;
496 if (c == EOF) {
497 cf->eof = 1;
498 cf->linenr++;
499 c = '\n';
500 }
501 return c;
502 }
503
504 static char *parse_value(void)
505 {
506 int quote = 0, comment = 0, space = 0;
507
508 strbuf_reset(&cf->value);
509 for (;;) {
510 int c = get_next_char();
511 if (c == '\n') {
512 if (quote) {
513 cf->linenr--;
514 return NULL;
515 }
516 return cf->value.buf;
517 }
518 if (comment)
519 continue;
520 if (isspace(c) && !quote) {
521 if (cf->value.len)
522 space++;
523 continue;
524 }
525 if (!quote) {
526 if (c == ';' || c == '#') {
527 comment = 1;
528 continue;
529 }
530 }
531 for (; space; space--)
532 strbuf_addch(&cf->value, ' ');
533 if (c == '\\') {
534 c = get_next_char();
535 switch (c) {
536 case '\n':
537 continue;
538 case 't':
539 c = '\t';
540 break;
541 case 'b':
542 c = '\b';
543 break;
544 case 'n':
545 c = '\n';
546 break;
547 /* Some characters escape as themselves */
548 case '\\': case '"':
549 break;
550 /* Reject unknown escape sequences */
551 default:
552 return NULL;
553 }
554 strbuf_addch(&cf->value, c);
555 continue;
556 }
557 if (c == '"') {
558 quote = 1-quote;
559 continue;
560 }
561 strbuf_addch(&cf->value, c);
562 }
563 }
564
565 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
566 {
567 int c;
568 char *value;
569 int ret;
570
571 /* Get the full name */
572 for (;;) {
573 c = get_next_char();
574 if (cf->eof)
575 break;
576 if (!iskeychar(c))
577 break;
578 strbuf_addch(name, tolower(c));
579 }
580
581 while (c == ' ' || c == '\t')
582 c = get_next_char();
583
584 value = NULL;
585 if (c != '\n') {
586 if (c != '=')
587 return -1;
588 value = parse_value();
589 if (!value)
590 return -1;
591 }
592 /*
593 * We already consumed the \n, but we need linenr to point to
594 * the line we just parsed during the call to fn to get
595 * accurate line number in error messages.
596 */
597 cf->linenr--;
598 ret = fn(name->buf, value, data);
599 if (ret >= 0)
600 cf->linenr++;
601 return ret;
602 }
603
604 static int get_extended_base_var(struct strbuf *name, int c)
605 {
606 do {
607 if (c == '\n')
608 goto error_incomplete_line;
609 c = get_next_char();
610 } while (isspace(c));
611
612 /* We require the format to be '[base "extension"]' */
613 if (c != '"')
614 return -1;
615 strbuf_addch(name, '.');
616
617 for (;;) {
618 int c = get_next_char();
619 if (c == '\n')
620 goto error_incomplete_line;
621 if (c == '"')
622 break;
623 if (c == '\\') {
624 c = get_next_char();
625 if (c == '\n')
626 goto error_incomplete_line;
627 }
628 strbuf_addch(name, c);
629 }
630
631 /* Final ']' */
632 if (get_next_char() != ']')
633 return -1;
634 return 0;
635 error_incomplete_line:
636 cf->linenr--;
637 return -1;
638 }
639
640 static int get_base_var(struct strbuf *name)
641 {
642 for (;;) {
643 int c = get_next_char();
644 if (cf->eof)
645 return -1;
646 if (c == ']')
647 return 0;
648 if (isspace(c))
649 return get_extended_base_var(name, c);
650 if (!iskeychar(c) && c != '.')
651 return -1;
652 strbuf_addch(name, tolower(c));
653 }
654 }
655
656 struct parse_event_data {
657 enum config_event_t previous_type;
658 size_t previous_offset;
659 const struct config_options *opts;
660 };
661
662 static int do_event(enum config_event_t type, struct parse_event_data *data)
663 {
664 size_t offset;
665
666 if (!data->opts || !data->opts->event_fn)
667 return 0;
668
669 if (type == CONFIG_EVENT_WHITESPACE &&
670 data->previous_type == type)
671 return 0;
672
673 offset = cf->do_ftell(cf);
674 /*
675 * At EOF, the parser always "inserts" an extra '\n', therefore
676 * the end offset of the event is the current file position, otherwise
677 * we will already have advanced to the next event.
678 */
679 if (type != CONFIG_EVENT_EOF)
680 offset--;
681
682 if (data->previous_type != CONFIG_EVENT_EOF &&
683 data->opts->event_fn(data->previous_type, data->previous_offset,
684 offset, data->opts->event_fn_data) < 0)
685 return -1;
686
687 data->previous_type = type;
688 data->previous_offset = offset;
689
690 return 0;
691 }
692
693 static int git_parse_source(config_fn_t fn, void *data,
694 const struct config_options *opts)
695 {
696 int comment = 0;
697 int baselen = 0;
698 struct strbuf *var = &cf->var;
699 int error_return = 0;
700 char *error_msg = NULL;
701
702 /* U+FEFF Byte Order Mark in UTF8 */
703 const char *bomptr = utf8_bom;
704
705 /* For the parser event callback */
706 struct parse_event_data event_data = {
707 CONFIG_EVENT_EOF, 0, opts
708 };
709
710 for (;;) {
711 int c;
712
713 c = get_next_char();
714 if (bomptr && *bomptr) {
715 /* We are at the file beginning; skip UTF8-encoded BOM
716 * if present. Sane editors won't put this in on their
717 * own, but e.g. Windows Notepad will do it happily. */
718 if (c == (*bomptr & 0377)) {
719 bomptr++;
720 continue;
721 } else {
722 /* Do not tolerate partial BOM. */
723 if (bomptr != utf8_bom)
724 break;
725 /* No BOM at file beginning. Cool. */
726 bomptr = NULL;
727 }
728 }
729 if (c == '\n') {
730 if (cf->eof) {
731 if (do_event(CONFIG_EVENT_EOF, &event_data) < 0)
732 return -1;
733 return 0;
734 }
735 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
736 return -1;
737 comment = 0;
738 continue;
739 }
740 if (comment)
741 continue;
742 if (isspace(c)) {
743 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
744 return -1;
745 continue;
746 }
747 if (c == '#' || c == ';') {
748 if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0)
749 return -1;
750 comment = 1;
751 continue;
752 }
753 if (c == '[') {
754 if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0)
755 return -1;
756
757 /* Reset prior to determining a new stem */
758 strbuf_reset(var);
759 if (get_base_var(var) < 0 || var->len < 1)
760 break;
761 strbuf_addch(var, '.');
762 baselen = var->len;
763 continue;
764 }
765 if (!isalpha(c))
766 break;
767
768 if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0)
769 return -1;
770
771 /*
772 * Truncate the var name back to the section header
773 * stem prior to grabbing the suffix part of the name
774 * and the value.
775 */
776 strbuf_setlen(var, baselen);
777 strbuf_addch(var, tolower(c));
778 if (get_value(fn, data, var) < 0)
779 break;
780 }
781
782 if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0)
783 return -1;
784
785 switch (cf->origin_type) {
786 case CONFIG_ORIGIN_BLOB:
787 error_msg = xstrfmt(_("bad config line %d in blob %s"),
788 cf->linenr, cf->name);
789 break;
790 case CONFIG_ORIGIN_FILE:
791 error_msg = xstrfmt(_("bad config line %d in file %s"),
792 cf->linenr, cf->name);
793 break;
794 case CONFIG_ORIGIN_STDIN:
795 error_msg = xstrfmt(_("bad config line %d in standard input"),
796 cf->linenr);
797 break;
798 case CONFIG_ORIGIN_SUBMODULE_BLOB:
799 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
800 cf->linenr, cf->name);
801 break;
802 case CONFIG_ORIGIN_CMDLINE:
803 error_msg = xstrfmt(_("bad config line %d in command line %s"),
804 cf->linenr, cf->name);
805 break;
806 default:
807 error_msg = xstrfmt(_("bad config line %d in %s"),
808 cf->linenr, cf->name);
809 }
810
811 if (cf->die_on_error)
812 die("%s", error_msg);
813 else
814 error_return = error("%s", error_msg);
815
816 free(error_msg);
817 return error_return;
818 }
819
820 static int parse_unit_factor(const char *end, uintmax_t *val)
821 {
822 if (!*end)
823 return 1;
824 else if (!strcasecmp(end, "k")) {
825 *val *= 1024;
826 return 1;
827 }
828 else if (!strcasecmp(end, "m")) {
829 *val *= 1024 * 1024;
830 return 1;
831 }
832 else if (!strcasecmp(end, "g")) {
833 *val *= 1024 * 1024 * 1024;
834 return 1;
835 }
836 return 0;
837 }
838
839 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
840 {
841 if (value && *value) {
842 char *end;
843 intmax_t val;
844 uintmax_t uval;
845 uintmax_t factor = 1;
846
847 errno = 0;
848 val = strtoimax(value, &end, 0);
849 if (errno == ERANGE)
850 return 0;
851 if (!parse_unit_factor(end, &factor)) {
852 errno = EINVAL;
853 return 0;
854 }
855 uval = labs(val);
856 uval *= factor;
857 if (uval > max || labs(val) > uval) {
858 errno = ERANGE;
859 return 0;
860 }
861 val *= factor;
862 *ret = val;
863 return 1;
864 }
865 errno = EINVAL;
866 return 0;
867 }
868
869 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
870 {
871 if (value && *value) {
872 char *end;
873 uintmax_t val;
874 uintmax_t oldval;
875
876 errno = 0;
877 val = strtoumax(value, &end, 0);
878 if (errno == ERANGE)
879 return 0;
880 oldval = val;
881 if (!parse_unit_factor(end, &val)) {
882 errno = EINVAL;
883 return 0;
884 }
885 if (val > max || oldval > val) {
886 errno = ERANGE;
887 return 0;
888 }
889 *ret = val;
890 return 1;
891 }
892 errno = EINVAL;
893 return 0;
894 }
895
896 static int git_parse_int(const char *value, int *ret)
897 {
898 intmax_t tmp;
899 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
900 return 0;
901 *ret = tmp;
902 return 1;
903 }
904
905 static int git_parse_int64(const char *value, int64_t *ret)
906 {
907 intmax_t tmp;
908 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
909 return 0;
910 *ret = tmp;
911 return 1;
912 }
913
914 int git_parse_ulong(const char *value, unsigned long *ret)
915 {
916 uintmax_t tmp;
917 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
918 return 0;
919 *ret = tmp;
920 return 1;
921 }
922
923 static int git_parse_ssize_t(const char *value, ssize_t *ret)
924 {
925 intmax_t tmp;
926 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
927 return 0;
928 *ret = tmp;
929 return 1;
930 }
931
932 NORETURN
933 static void die_bad_number(const char *name, const char *value)
934 {
935 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
936
937 if (!value)
938 value = "";
939
940 if (!(cf && cf->name))
941 die(_("bad numeric config value '%s' for '%s': %s"),
942 value, name, error_type);
943
944 switch (cf->origin_type) {
945 case CONFIG_ORIGIN_BLOB:
946 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
947 value, name, cf->name, error_type);
948 case CONFIG_ORIGIN_FILE:
949 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
950 value, name, cf->name, error_type);
951 case CONFIG_ORIGIN_STDIN:
952 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
953 value, name, error_type);
954 case CONFIG_ORIGIN_SUBMODULE_BLOB:
955 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
956 value, name, cf->name, error_type);
957 case CONFIG_ORIGIN_CMDLINE:
958 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
959 value, name, cf->name, error_type);
960 default:
961 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
962 value, name, cf->name, error_type);
963 }
964 }
965
966 int git_config_int(const char *name, const char *value)
967 {
968 int ret;
969 if (!git_parse_int(value, &ret))
970 die_bad_number(name, value);
971 return ret;
972 }
973
974 int64_t git_config_int64(const char *name, const char *value)
975 {
976 int64_t ret;
977 if (!git_parse_int64(value, &ret))
978 die_bad_number(name, value);
979 return ret;
980 }
981
982 unsigned long git_config_ulong(const char *name, const char *value)
983 {
984 unsigned long ret;
985 if (!git_parse_ulong(value, &ret))
986 die_bad_number(name, value);
987 return ret;
988 }
989
990 ssize_t git_config_ssize_t(const char *name, const char *value)
991 {
992 ssize_t ret;
993 if (!git_parse_ssize_t(value, &ret))
994 die_bad_number(name, value);
995 return ret;
996 }
997
998 static int git_parse_maybe_bool_text(const char *value)
999 {
1000 if (!value)
1001 return 1;
1002 if (!*value)
1003 return 0;
1004 if (!strcasecmp(value, "true")
1005 || !strcasecmp(value, "yes")
1006 || !strcasecmp(value, "on"))
1007 return 1;
1008 if (!strcasecmp(value, "false")
1009 || !strcasecmp(value, "no")
1010 || !strcasecmp(value, "off"))
1011 return 0;
1012 return -1;
1013 }
1014
1015 int git_parse_maybe_bool(const char *value)
1016 {
1017 int v = git_parse_maybe_bool_text(value);
1018 if (0 <= v)
1019 return v;
1020 if (git_parse_int(value, &v))
1021 return !!v;
1022 return -1;
1023 }
1024
1025 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1026 {
1027 int v = git_parse_maybe_bool_text(value);
1028 if (0 <= v) {
1029 *is_bool = 1;
1030 return v;
1031 }
1032 *is_bool = 0;
1033 return git_config_int(name, value);
1034 }
1035
1036 int git_config_bool(const char *name, const char *value)
1037 {
1038 int discard;
1039 return !!git_config_bool_or_int(name, value, &discard);
1040 }
1041
1042 int git_config_string(const char **dest, const char *var, const char *value)
1043 {
1044 if (!value)
1045 return config_error_nonbool(var);
1046 *dest = xstrdup(value);
1047 return 0;
1048 }
1049
1050 int git_config_pathname(const char **dest, const char *var, const char *value)
1051 {
1052 if (!value)
1053 return config_error_nonbool(var);
1054 *dest = expand_user_path(value, 0);
1055 if (!*dest)
1056 die(_("failed to expand user dir in: '%s'"), value);
1057 return 0;
1058 }
1059
1060 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1061 {
1062 if (!value)
1063 return config_error_nonbool(var);
1064 if (parse_expiry_date(value, timestamp))
1065 return error(_("'%s' for '%s' is not a valid timestamp"),
1066 value, var);
1067 return 0;
1068 }
1069
1070 static int git_default_core_config(const char *var, const char *value)
1071 {
1072 /* This needs a better name */
1073 if (!strcmp(var, "core.filemode")) {
1074 trust_executable_bit = git_config_bool(var, value);
1075 return 0;
1076 }
1077 if (!strcmp(var, "core.trustctime")) {
1078 trust_ctime = git_config_bool(var, value);
1079 return 0;
1080 }
1081 if (!strcmp(var, "core.checkstat")) {
1082 if (!strcasecmp(value, "default"))
1083 check_stat = 1;
1084 else if (!strcasecmp(value, "minimal"))
1085 check_stat = 0;
1086 }
1087
1088 if (!strcmp(var, "core.quotepath")) {
1089 quote_path_fully = git_config_bool(var, value);
1090 return 0;
1091 }
1092
1093 if (!strcmp(var, "core.symlinks")) {
1094 has_symlinks = git_config_bool(var, value);
1095 return 0;
1096 }
1097
1098 if (!strcmp(var, "core.ignorecase")) {
1099 ignore_case = git_config_bool(var, value);
1100 return 0;
1101 }
1102
1103 if (!strcmp(var, "core.attributesfile"))
1104 return git_config_pathname(&git_attributes_file, var, value);
1105
1106 if (!strcmp(var, "core.hookspath"))
1107 return git_config_pathname(&git_hooks_path, var, value);
1108
1109 if (!strcmp(var, "core.bare")) {
1110 is_bare_repository_cfg = git_config_bool(var, value);
1111 return 0;
1112 }
1113
1114 if (!strcmp(var, "core.ignorestat")) {
1115 assume_unchanged = git_config_bool(var, value);
1116 return 0;
1117 }
1118
1119 if (!strcmp(var, "core.prefersymlinkrefs")) {
1120 prefer_symlink_refs = git_config_bool(var, value);
1121 return 0;
1122 }
1123
1124 if (!strcmp(var, "core.logallrefupdates")) {
1125 if (value && !strcasecmp(value, "always"))
1126 log_all_ref_updates = LOG_REFS_ALWAYS;
1127 else if (git_config_bool(var, value))
1128 log_all_ref_updates = LOG_REFS_NORMAL;
1129 else
1130 log_all_ref_updates = LOG_REFS_NONE;
1131 return 0;
1132 }
1133
1134 if (!strcmp(var, "core.warnambiguousrefs")) {
1135 warn_ambiguous_refs = git_config_bool(var, value);
1136 return 0;
1137 }
1138
1139 if (!strcmp(var, "core.abbrev")) {
1140 if (!value)
1141 return config_error_nonbool(var);
1142 if (!strcasecmp(value, "auto"))
1143 default_abbrev = -1;
1144 else {
1145 int abbrev = git_config_int(var, value);
1146 if (abbrev < minimum_abbrev || abbrev > 40)
1147 return error("abbrev length out of range: %d", abbrev);
1148 default_abbrev = abbrev;
1149 }
1150 return 0;
1151 }
1152
1153 if (!strcmp(var, "core.disambiguate"))
1154 return set_disambiguate_hint_config(var, value);
1155
1156 if (!strcmp(var, "core.loosecompression")) {
1157 int level = git_config_int(var, value);
1158 if (level == -1)
1159 level = Z_DEFAULT_COMPRESSION;
1160 else if (level < 0 || level > Z_BEST_COMPRESSION)
1161 die(_("bad zlib compression level %d"), level);
1162 zlib_compression_level = level;
1163 zlib_compression_seen = 1;
1164 return 0;
1165 }
1166
1167 if (!strcmp(var, "core.compression")) {
1168 int level = git_config_int(var, value);
1169 if (level == -1)
1170 level = Z_DEFAULT_COMPRESSION;
1171 else if (level < 0 || level > Z_BEST_COMPRESSION)
1172 die(_("bad zlib compression level %d"), level);
1173 core_compression_level = level;
1174 core_compression_seen = 1;
1175 if (!zlib_compression_seen)
1176 zlib_compression_level = level;
1177 if (!pack_compression_seen)
1178 pack_compression_level = level;
1179 return 0;
1180 }
1181
1182 if (!strcmp(var, "core.packedgitwindowsize")) {
1183 int pgsz_x2 = getpagesize() * 2;
1184 packed_git_window_size = git_config_ulong(var, value);
1185
1186 /* This value must be multiple of (pagesize * 2) */
1187 packed_git_window_size /= pgsz_x2;
1188 if (packed_git_window_size < 1)
1189 packed_git_window_size = 1;
1190 packed_git_window_size *= pgsz_x2;
1191 return 0;
1192 }
1193
1194 if (!strcmp(var, "core.bigfilethreshold")) {
1195 big_file_threshold = git_config_ulong(var, value);
1196 return 0;
1197 }
1198
1199 if (!strcmp(var, "core.packedgitlimit")) {
1200 packed_git_limit = git_config_ulong(var, value);
1201 return 0;
1202 }
1203
1204 if (!strcmp(var, "core.deltabasecachelimit")) {
1205 delta_base_cache_limit = git_config_ulong(var, value);
1206 return 0;
1207 }
1208
1209 if (!strcmp(var, "core.autocrlf")) {
1210 if (value && !strcasecmp(value, "input")) {
1211 auto_crlf = AUTO_CRLF_INPUT;
1212 return 0;
1213 }
1214 auto_crlf = git_config_bool(var, value);
1215 return 0;
1216 }
1217
1218 if (!strcmp(var, "core.safecrlf")) {
1219 int eol_rndtrp_die;
1220 if (value && !strcasecmp(value, "warn")) {
1221 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1222 return 0;
1223 }
1224 eol_rndtrp_die = git_config_bool(var, value);
1225 global_conv_flags_eol = eol_rndtrp_die ?
1226 CONV_EOL_RNDTRP_DIE : CONV_EOL_RNDTRP_WARN;
1227 return 0;
1228 }
1229
1230 if (!strcmp(var, "core.eol")) {
1231 if (value && !strcasecmp(value, "lf"))
1232 core_eol = EOL_LF;
1233 else if (value && !strcasecmp(value, "crlf"))
1234 core_eol = EOL_CRLF;
1235 else if (value && !strcasecmp(value, "native"))
1236 core_eol = EOL_NATIVE;
1237 else
1238 core_eol = EOL_UNSET;
1239 return 0;
1240 }
1241
1242 if (!strcmp(var, "core.notesref")) {
1243 notes_ref_name = xstrdup(value);
1244 return 0;
1245 }
1246
1247 if (!strcmp(var, "core.editor"))
1248 return git_config_string(&editor_program, var, value);
1249
1250 if (!strcmp(var, "core.commentchar")) {
1251 if (!value)
1252 return config_error_nonbool(var);
1253 else if (!strcasecmp(value, "auto"))
1254 auto_comment_line_char = 1;
1255 else if (value[0] && !value[1]) {
1256 comment_line_char = value[0];
1257 auto_comment_line_char = 0;
1258 } else
1259 return error("core.commentChar should only be one character");
1260 return 0;
1261 }
1262
1263 if (!strcmp(var, "core.askpass"))
1264 return git_config_string(&askpass_program, var, value);
1265
1266 if (!strcmp(var, "core.excludesfile"))
1267 return git_config_pathname(&excludes_file, var, value);
1268
1269 if (!strcmp(var, "core.whitespace")) {
1270 if (!value)
1271 return config_error_nonbool(var);
1272 whitespace_rule_cfg = parse_whitespace_rule(value);
1273 return 0;
1274 }
1275
1276 if (!strcmp(var, "core.fsyncobjectfiles")) {
1277 fsync_object_files = git_config_bool(var, value);
1278 return 0;
1279 }
1280
1281 if (!strcmp(var, "core.preloadindex")) {
1282 core_preload_index = git_config_bool(var, value);
1283 return 0;
1284 }
1285
1286 if (!strcmp(var, "core.createobject")) {
1287 if (!strcmp(value, "rename"))
1288 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1289 else if (!strcmp(value, "link"))
1290 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1291 else
1292 die(_("invalid mode for object creation: %s"), value);
1293 return 0;
1294 }
1295
1296 if (!strcmp(var, "core.commitgraph")) {
1297 core_commit_graph = git_config_bool(var, value);
1298 return 0;
1299 }
1300
1301 if (!strcmp(var, "core.sparsecheckout")) {
1302 core_apply_sparse_checkout = git_config_bool(var, value);
1303 return 0;
1304 }
1305
1306 if (!strcmp(var, "core.precomposeunicode")) {
1307 precomposed_unicode = git_config_bool(var, value);
1308 return 0;
1309 }
1310
1311 if (!strcmp(var, "core.protecthfs")) {
1312 protect_hfs = git_config_bool(var, value);
1313 return 0;
1314 }
1315
1316 if (!strcmp(var, "core.protectntfs")) {
1317 protect_ntfs = git_config_bool(var, value);
1318 return 0;
1319 }
1320
1321 if (!strcmp(var, "core.hidedotfiles")) {
1322 if (value && !strcasecmp(value, "dotgitonly"))
1323 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1324 else
1325 hide_dotfiles = git_config_bool(var, value);
1326 return 0;
1327 }
1328
1329 if (!strcmp(var, "core.partialclonefilter")) {
1330 return git_config_string(&core_partial_clone_filter_default,
1331 var, value);
1332 }
1333
1334 /* Add other config variables here and to Documentation/config.txt. */
1335 return 0;
1336 }
1337
1338 static int git_default_i18n_config(const char *var, const char *value)
1339 {
1340 if (!strcmp(var, "i18n.commitencoding"))
1341 return git_config_string(&git_commit_encoding, var, value);
1342
1343 if (!strcmp(var, "i18n.logoutputencoding"))
1344 return git_config_string(&git_log_output_encoding, var, value);
1345
1346 /* Add other config variables here and to Documentation/config.txt. */
1347 return 0;
1348 }
1349
1350 static int git_default_branch_config(const char *var, const char *value)
1351 {
1352 if (!strcmp(var, "branch.autosetupmerge")) {
1353 if (value && !strcasecmp(value, "always")) {
1354 git_branch_track = BRANCH_TRACK_ALWAYS;
1355 return 0;
1356 }
1357 git_branch_track = git_config_bool(var, value);
1358 return 0;
1359 }
1360 if (!strcmp(var, "branch.autosetuprebase")) {
1361 if (!value)
1362 return config_error_nonbool(var);
1363 else if (!strcmp(value, "never"))
1364 autorebase = AUTOREBASE_NEVER;
1365 else if (!strcmp(value, "local"))
1366 autorebase = AUTOREBASE_LOCAL;
1367 else if (!strcmp(value, "remote"))
1368 autorebase = AUTOREBASE_REMOTE;
1369 else if (!strcmp(value, "always"))
1370 autorebase = AUTOREBASE_ALWAYS;
1371 else
1372 return error("malformed value for %s", var);
1373 return 0;
1374 }
1375
1376 /* Add other config variables here and to Documentation/config.txt. */
1377 return 0;
1378 }
1379
1380 static int git_default_push_config(const char *var, const char *value)
1381 {
1382 if (!strcmp(var, "push.default")) {
1383 if (!value)
1384 return config_error_nonbool(var);
1385 else if (!strcmp(value, "nothing"))
1386 push_default = PUSH_DEFAULT_NOTHING;
1387 else if (!strcmp(value, "matching"))
1388 push_default = PUSH_DEFAULT_MATCHING;
1389 else if (!strcmp(value, "simple"))
1390 push_default = PUSH_DEFAULT_SIMPLE;
1391 else if (!strcmp(value, "upstream"))
1392 push_default = PUSH_DEFAULT_UPSTREAM;
1393 else if (!strcmp(value, "tracking")) /* deprecated */
1394 push_default = PUSH_DEFAULT_UPSTREAM;
1395 else if (!strcmp(value, "current"))
1396 push_default = PUSH_DEFAULT_CURRENT;
1397 else {
1398 error("malformed value for %s: %s", var, value);
1399 return error("Must be one of nothing, matching, simple, "
1400 "upstream or current.");
1401 }
1402 return 0;
1403 }
1404
1405 /* Add other config variables here and to Documentation/config.txt. */
1406 return 0;
1407 }
1408
1409 static int git_default_mailmap_config(const char *var, const char *value)
1410 {
1411 if (!strcmp(var, "mailmap.file"))
1412 return git_config_pathname(&git_mailmap_file, var, value);
1413 if (!strcmp(var, "mailmap.blob"))
1414 return git_config_string(&git_mailmap_blob, var, value);
1415
1416 /* Add other config variables here and to Documentation/config.txt. */
1417 return 0;
1418 }
1419
1420 int git_default_config(const char *var, const char *value, void *dummy)
1421 {
1422 if (starts_with(var, "core."))
1423 return git_default_core_config(var, value);
1424
1425 if (starts_with(var, "user."))
1426 return git_ident_config(var, value, dummy);
1427
1428 if (starts_with(var, "i18n."))
1429 return git_default_i18n_config(var, value);
1430
1431 if (starts_with(var, "branch."))
1432 return git_default_branch_config(var, value);
1433
1434 if (starts_with(var, "push."))
1435 return git_default_push_config(var, value);
1436
1437 if (starts_with(var, "mailmap."))
1438 return git_default_mailmap_config(var, value);
1439
1440 if (starts_with(var, "advice."))
1441 return git_default_advice_config(var, value);
1442
1443 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1444 pager_use_color = git_config_bool(var,value);
1445 return 0;
1446 }
1447
1448 if (!strcmp(var, "pack.packsizelimit")) {
1449 pack_size_limit_cfg = git_config_ulong(var, value);
1450 return 0;
1451 }
1452
1453 if (!strcmp(var, "pack.compression")) {
1454 int level = git_config_int(var, value);
1455 if (level == -1)
1456 level = Z_DEFAULT_COMPRESSION;
1457 else if (level < 0 || level > Z_BEST_COMPRESSION)
1458 die(_("bad pack compression level %d"), level);
1459 pack_compression_level = level;
1460 pack_compression_seen = 1;
1461 return 0;
1462 }
1463
1464 /* Add other config variables here and to Documentation/config.txt. */
1465 return 0;
1466 }
1467
1468 /*
1469 * All source specific fields in the union, die_on_error, name and the callbacks
1470 * fgetc, ungetc, ftell of top need to be initialized before calling
1471 * this function.
1472 */
1473 static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
1474 const struct config_options *opts)
1475 {
1476 int ret;
1477
1478 /* push config-file parsing state stack */
1479 top->prev = cf;
1480 top->linenr = 1;
1481 top->eof = 0;
1482 strbuf_init(&top->value, 1024);
1483 strbuf_init(&top->var, 1024);
1484 cf = top;
1485
1486 ret = git_parse_source(fn, data, opts);
1487
1488 /* pop config-file parsing state stack */
1489 strbuf_release(&top->value);
1490 strbuf_release(&top->var);
1491 cf = top->prev;
1492
1493 return ret;
1494 }
1495
1496 static int do_config_from_file(config_fn_t fn,
1497 const enum config_origin_type origin_type,
1498 const char *name, const char *path, FILE *f,
1499 void *data, const struct config_options *opts)
1500 {
1501 struct config_source top;
1502 int ret;
1503
1504 top.u.file = f;
1505 top.origin_type = origin_type;
1506 top.name = name;
1507 top.path = path;
1508 top.die_on_error = 1;
1509 top.do_fgetc = config_file_fgetc;
1510 top.do_ungetc = config_file_ungetc;
1511 top.do_ftell = config_file_ftell;
1512
1513 flockfile(f);
1514 ret = do_config_from(&top, fn, data, opts);
1515 funlockfile(f);
1516 return ret;
1517 }
1518
1519 static int git_config_from_stdin(config_fn_t fn, void *data)
1520 {
1521 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1522 data, NULL);
1523 }
1524
1525 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1526 void *data,
1527 const struct config_options *opts)
1528 {
1529 int ret = -1;
1530 FILE *f;
1531
1532 f = fopen_or_warn(filename, "r");
1533 if (f) {
1534 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1535 filename, f, data, opts);
1536 fclose(f);
1537 }
1538 return ret;
1539 }
1540
1541 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1542 {
1543 return git_config_from_file_with_options(fn, filename, data, NULL);
1544 }
1545
1546 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1547 const char *name, const char *buf, size_t len, void *data)
1548 {
1549 struct config_source top;
1550
1551 top.u.buf.buf = buf;
1552 top.u.buf.len = len;
1553 top.u.buf.pos = 0;
1554 top.origin_type = origin_type;
1555 top.name = name;
1556 top.path = NULL;
1557 top.die_on_error = 0;
1558 top.do_fgetc = config_buf_fgetc;
1559 top.do_ungetc = config_buf_ungetc;
1560 top.do_ftell = config_buf_ftell;
1561
1562 return do_config_from(&top, fn, data, NULL);
1563 }
1564
1565 int git_config_from_blob_oid(config_fn_t fn,
1566 const char *name,
1567 const struct object_id *oid,
1568 void *data)
1569 {
1570 enum object_type type;
1571 char *buf;
1572 unsigned long size;
1573 int ret;
1574
1575 buf = read_object_file(oid, &type, &size);
1576 if (!buf)
1577 return error("unable to load config blob object '%s'", name);
1578 if (type != OBJ_BLOB) {
1579 free(buf);
1580 return error("reference '%s' does not point to a blob", name);
1581 }
1582
1583 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1584 free(buf);
1585
1586 return ret;
1587 }
1588
1589 static int git_config_from_blob_ref(config_fn_t fn,
1590 const char *name,
1591 void *data)
1592 {
1593 struct object_id oid;
1594
1595 if (get_oid(name, &oid) < 0)
1596 return error("unable to resolve config blob '%s'", name);
1597 return git_config_from_blob_oid(fn, name, &oid, data);
1598 }
1599
1600 const char *git_etc_gitconfig(void)
1601 {
1602 static const char *system_wide;
1603 if (!system_wide)
1604 system_wide = system_path(ETC_GITCONFIG);
1605 return system_wide;
1606 }
1607
1608 /*
1609 * Parse environment variable 'k' as a boolean (in various
1610 * possible spellings); if missing, use the default value 'def'.
1611 */
1612 int git_env_bool(const char *k, int def)
1613 {
1614 const char *v = getenv(k);
1615 return v ? git_config_bool(k, v) : def;
1616 }
1617
1618 /*
1619 * Parse environment variable 'k' as ulong with possibly a unit
1620 * suffix; if missing, use the default value 'val'.
1621 */
1622 unsigned long git_env_ulong(const char *k, unsigned long val)
1623 {
1624 const char *v = getenv(k);
1625 if (v && !git_parse_ulong(v, &val))
1626 die("failed to parse %s", k);
1627 return val;
1628 }
1629
1630 int git_config_system(void)
1631 {
1632 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1633 }
1634
1635 static int do_git_config_sequence(const struct config_options *opts,
1636 config_fn_t fn, void *data)
1637 {
1638 int ret = 0;
1639 char *xdg_config = xdg_config_home("config");
1640 char *user_config = expand_user_path("~/.gitconfig", 0);
1641 char *repo_config;
1642
1643 if (opts->commondir)
1644 repo_config = mkpathdup("%s/config", opts->commondir);
1645 else
1646 repo_config = NULL;
1647
1648 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1649 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1650 ret += git_config_from_file(fn, git_etc_gitconfig(),
1651 data);
1652
1653 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1654 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1655 ret += git_config_from_file(fn, xdg_config, data);
1656
1657 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1658 ret += git_config_from_file(fn, user_config, data);
1659
1660 current_parsing_scope = CONFIG_SCOPE_REPO;
1661 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1662 ret += git_config_from_file(fn, repo_config, data);
1663
1664 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1665 if (git_config_from_parameters(fn, data) < 0)
1666 die(_("unable to parse command-line config"));
1667
1668 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1669 free(xdg_config);
1670 free(user_config);
1671 free(repo_config);
1672 return ret;
1673 }
1674
1675 int config_with_options(config_fn_t fn, void *data,
1676 struct git_config_source *config_source,
1677 const struct config_options *opts)
1678 {
1679 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1680
1681 if (opts->respect_includes) {
1682 inc.fn = fn;
1683 inc.data = data;
1684 inc.opts = opts;
1685 fn = git_config_include;
1686 data = &inc;
1687 }
1688
1689 /*
1690 * If we have a specific filename, use it. Otherwise, follow the
1691 * regular lookup sequence.
1692 */
1693 if (config_source && config_source->use_stdin)
1694 return git_config_from_stdin(fn, data);
1695 else if (config_source && config_source->file)
1696 return git_config_from_file(fn, config_source->file, data);
1697 else if (config_source && config_source->blob)
1698 return git_config_from_blob_ref(fn, config_source->blob, data);
1699
1700 return do_git_config_sequence(opts, fn, data);
1701 }
1702
1703 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1704 {
1705 int i, value_index;
1706 struct string_list *values;
1707 struct config_set_element *entry;
1708 struct configset_list *list = &cs->list;
1709
1710 for (i = 0; i < list->nr; i++) {
1711 entry = list->items[i].e;
1712 value_index = list->items[i].value_index;
1713 values = &entry->value_list;
1714
1715 current_config_kvi = values->items[value_index].util;
1716
1717 if (fn(entry->key, values->items[value_index].string, data) < 0)
1718 git_die_config_linenr(entry->key,
1719 current_config_kvi->filename,
1720 current_config_kvi->linenr);
1721
1722 current_config_kvi = NULL;
1723 }
1724 }
1725
1726 void read_early_config(config_fn_t cb, void *data)
1727 {
1728 struct config_options opts = {0};
1729 struct strbuf commondir = STRBUF_INIT;
1730 struct strbuf gitdir = STRBUF_INIT;
1731
1732 opts.respect_includes = 1;
1733
1734 if (have_git_dir()) {
1735 opts.commondir = get_git_common_dir();
1736 opts.git_dir = get_git_dir();
1737 /*
1738 * When setup_git_directory() was not yet asked to discover the
1739 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1740 * is any repository config we should use (but unlike
1741 * setup_git_directory_gently(), no global state is changed, most
1742 * notably, the current working directory is still the same after the
1743 * call).
1744 */
1745 } else if (!discover_git_directory(&commondir, &gitdir)) {
1746 opts.commondir = commondir.buf;
1747 opts.git_dir = gitdir.buf;
1748 }
1749
1750 config_with_options(cb, data, NULL, &opts);
1751
1752 strbuf_release(&commondir);
1753 strbuf_release(&gitdir);
1754 }
1755
1756 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1757 {
1758 struct config_set_element k;
1759 struct config_set_element *found_entry;
1760 char *normalized_key;
1761 /*
1762 * `key` may come from the user, so normalize it before using it
1763 * for querying entries from the hashmap.
1764 */
1765 if (git_config_parse_key(key, &normalized_key, NULL))
1766 return NULL;
1767
1768 hashmap_entry_init(&k, strhash(normalized_key));
1769 k.key = normalized_key;
1770 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1771 free(normalized_key);
1772 return found_entry;
1773 }
1774
1775 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1776 {
1777 struct config_set_element *e;
1778 struct string_list_item *si;
1779 struct configset_list_item *l_item;
1780 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1781
1782 e = configset_find_element(cs, key);
1783 /*
1784 * Since the keys are being fed by git_config*() callback mechanism, they
1785 * are already normalized. So simply add them without any further munging.
1786 */
1787 if (!e) {
1788 e = xmalloc(sizeof(*e));
1789 hashmap_entry_init(e, strhash(key));
1790 e->key = xstrdup(key);
1791 string_list_init(&e->value_list, 1);
1792 hashmap_add(&cs->config_hash, e);
1793 }
1794 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1795
1796 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1797 l_item = &cs->list.items[cs->list.nr++];
1798 l_item->e = e;
1799 l_item->value_index = e->value_list.nr - 1;
1800
1801 if (!cf)
1802 die("BUG: configset_add_value has no source");
1803 if (cf->name) {
1804 kv_info->filename = strintern(cf->name);
1805 kv_info->linenr = cf->linenr;
1806 kv_info->origin_type = cf->origin_type;
1807 } else {
1808 /* for values read from `git_config_from_parameters()` */
1809 kv_info->filename = NULL;
1810 kv_info->linenr = -1;
1811 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1812 }
1813 kv_info->scope = current_parsing_scope;
1814 si->util = kv_info;
1815
1816 return 0;
1817 }
1818
1819 static int config_set_element_cmp(const void *unused_cmp_data,
1820 const void *entry,
1821 const void *entry_or_key,
1822 const void *unused_keydata)
1823 {
1824 const struct config_set_element *e1 = entry;
1825 const struct config_set_element *e2 = entry_or_key;
1826
1827 return strcmp(e1->key, e2->key);
1828 }
1829
1830 void git_configset_init(struct config_set *cs)
1831 {
1832 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1833 cs->hash_initialized = 1;
1834 cs->list.nr = 0;
1835 cs->list.alloc = 0;
1836 cs->list.items = NULL;
1837 }
1838
1839 void git_configset_clear(struct config_set *cs)
1840 {
1841 struct config_set_element *entry;
1842 struct hashmap_iter iter;
1843 if (!cs->hash_initialized)
1844 return;
1845
1846 hashmap_iter_init(&cs->config_hash, &iter);
1847 while ((entry = hashmap_iter_next(&iter))) {
1848 free(entry->key);
1849 string_list_clear(&entry->value_list, 1);
1850 }
1851 hashmap_free(&cs->config_hash, 1);
1852 cs->hash_initialized = 0;
1853 free(cs->list.items);
1854 cs->list.nr = 0;
1855 cs->list.alloc = 0;
1856 cs->list.items = NULL;
1857 }
1858
1859 static int config_set_callback(const char *key, const char *value, void *cb)
1860 {
1861 struct config_set *cs = cb;
1862 configset_add_value(cs, key, value);
1863 return 0;
1864 }
1865
1866 int git_configset_add_file(struct config_set *cs, const char *filename)
1867 {
1868 return git_config_from_file(config_set_callback, filename, cs);
1869 }
1870
1871 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1872 {
1873 const struct string_list *values = NULL;
1874 /*
1875 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1876 * queried key in the files of the configset, the value returned will be the last
1877 * value in the value list for that key.
1878 */
1879 values = git_configset_get_value_multi(cs, key);
1880
1881 if (!values)
1882 return 1;
1883 assert(values->nr > 0);
1884 *value = values->items[values->nr - 1].string;
1885 return 0;
1886 }
1887
1888 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1889 {
1890 struct config_set_element *e = configset_find_element(cs, key);
1891 return e ? &e->value_list : NULL;
1892 }
1893
1894 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1895 {
1896 const char *value;
1897 if (!git_configset_get_value(cs, key, &value))
1898 return git_config_string(dest, key, value);
1899 else
1900 return 1;
1901 }
1902
1903 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1904 {
1905 return git_configset_get_string_const(cs, key, (const char **)dest);
1906 }
1907
1908 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1909 {
1910 const char *value;
1911 if (!git_configset_get_value(cs, key, &value)) {
1912 *dest = git_config_int(key, value);
1913 return 0;
1914 } else
1915 return 1;
1916 }
1917
1918 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1919 {
1920 const char *value;
1921 if (!git_configset_get_value(cs, key, &value)) {
1922 *dest = git_config_ulong(key, value);
1923 return 0;
1924 } else
1925 return 1;
1926 }
1927
1928 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1929 {
1930 const char *value;
1931 if (!git_configset_get_value(cs, key, &value)) {
1932 *dest = git_config_bool(key, value);
1933 return 0;
1934 } else
1935 return 1;
1936 }
1937
1938 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1939 int *is_bool, int *dest)
1940 {
1941 const char *value;
1942 if (!git_configset_get_value(cs, key, &value)) {
1943 *dest = git_config_bool_or_int(key, value, is_bool);
1944 return 0;
1945 } else
1946 return 1;
1947 }
1948
1949 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1950 {
1951 const char *value;
1952 if (!git_configset_get_value(cs, key, &value)) {
1953 *dest = git_parse_maybe_bool(value);
1954 if (*dest == -1)
1955 return -1;
1956 return 0;
1957 } else
1958 return 1;
1959 }
1960
1961 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1962 {
1963 const char *value;
1964 if (!git_configset_get_value(cs, key, &value))
1965 return git_config_pathname(dest, key, value);
1966 else
1967 return 1;
1968 }
1969
1970 /* Functions use to read configuration from a repository */
1971 static void repo_read_config(struct repository *repo)
1972 {
1973 struct config_options opts;
1974
1975 opts.respect_includes = 1;
1976 opts.commondir = repo->commondir;
1977 opts.git_dir = repo->gitdir;
1978
1979 if (!repo->config)
1980 repo->config = xcalloc(1, sizeof(struct config_set));
1981 else
1982 git_configset_clear(repo->config);
1983
1984 git_configset_init(repo->config);
1985
1986 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1987 /*
1988 * config_with_options() normally returns only
1989 * zero, as most errors are fatal, and
1990 * non-fatal potential errors are guarded by "if"
1991 * statements that are entered only when no error is
1992 * possible.
1993 *
1994 * If we ever encounter a non-fatal error, it means
1995 * something went really wrong and we should stop
1996 * immediately.
1997 */
1998 die(_("unknown error occurred while reading the configuration files"));
1999 }
2000
2001 static void git_config_check_init(struct repository *repo)
2002 {
2003 if (repo->config && repo->config->hash_initialized)
2004 return;
2005 repo_read_config(repo);
2006 }
2007
2008 static void repo_config_clear(struct repository *repo)
2009 {
2010 if (!repo->config || !repo->config->hash_initialized)
2011 return;
2012 git_configset_clear(repo->config);
2013 }
2014
2015 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2016 {
2017 git_config_check_init(repo);
2018 configset_iter(repo->config, fn, data);
2019 }
2020
2021 int repo_config_get_value(struct repository *repo,
2022 const char *key, const char **value)
2023 {
2024 git_config_check_init(repo);
2025 return git_configset_get_value(repo->config, key, value);
2026 }
2027
2028 const struct string_list *repo_config_get_value_multi(struct repository *repo,
2029 const char *key)
2030 {
2031 git_config_check_init(repo);
2032 return git_configset_get_value_multi(repo->config, key);
2033 }
2034
2035 int repo_config_get_string_const(struct repository *repo,
2036 const char *key, const char **dest)
2037 {
2038 int ret;
2039 git_config_check_init(repo);
2040 ret = git_configset_get_string_const(repo->config, key, dest);
2041 if (ret < 0)
2042 git_die_config(key, NULL);
2043 return ret;
2044 }
2045
2046 int repo_config_get_string(struct repository *repo,
2047 const char *key, char **dest)
2048 {
2049 git_config_check_init(repo);
2050 return repo_config_get_string_const(repo, key, (const char **)dest);
2051 }
2052
2053 int repo_config_get_int(struct repository *repo,
2054 const char *key, int *dest)
2055 {
2056 git_config_check_init(repo);
2057 return git_configset_get_int(repo->config, key, dest);
2058 }
2059
2060 int repo_config_get_ulong(struct repository *repo,
2061 const char *key, unsigned long *dest)
2062 {
2063 git_config_check_init(repo);
2064 return git_configset_get_ulong(repo->config, key, dest);
2065 }
2066
2067 int repo_config_get_bool(struct repository *repo,
2068 const char *key, int *dest)
2069 {
2070 git_config_check_init(repo);
2071 return git_configset_get_bool(repo->config, key, dest);
2072 }
2073
2074 int repo_config_get_bool_or_int(struct repository *repo,
2075 const char *key, int *is_bool, int *dest)
2076 {
2077 git_config_check_init(repo);
2078 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2079 }
2080
2081 int repo_config_get_maybe_bool(struct repository *repo,
2082 const char *key, int *dest)
2083 {
2084 git_config_check_init(repo);
2085 return git_configset_get_maybe_bool(repo->config, key, dest);
2086 }
2087
2088 int repo_config_get_pathname(struct repository *repo,
2089 const char *key, const char **dest)
2090 {
2091 int ret;
2092 git_config_check_init(repo);
2093 ret = git_configset_get_pathname(repo->config, key, dest);
2094 if (ret < 0)
2095 git_die_config(key, NULL);
2096 return ret;
2097 }
2098
2099 /* Functions used historically to read configuration from 'the_repository' */
2100 void git_config(config_fn_t fn, void *data)
2101 {
2102 repo_config(the_repository, fn, data);
2103 }
2104
2105 void git_config_clear(void)
2106 {
2107 repo_config_clear(the_repository);
2108 }
2109
2110 int git_config_get_value(const char *key, const char **value)
2111 {
2112 return repo_config_get_value(the_repository, key, value);
2113 }
2114
2115 const struct string_list *git_config_get_value_multi(const char *key)
2116 {
2117 return repo_config_get_value_multi(the_repository, key);
2118 }
2119
2120 int git_config_get_string_const(const char *key, const char **dest)
2121 {
2122 return repo_config_get_string_const(the_repository, key, dest);
2123 }
2124
2125 int git_config_get_string(const char *key, char **dest)
2126 {
2127 return repo_config_get_string(the_repository, key, dest);
2128 }
2129
2130 int git_config_get_int(const char *key, int *dest)
2131 {
2132 return repo_config_get_int(the_repository, key, dest);
2133 }
2134
2135 int git_config_get_ulong(const char *key, unsigned long *dest)
2136 {
2137 return repo_config_get_ulong(the_repository, key, dest);
2138 }
2139
2140 int git_config_get_bool(const char *key, int *dest)
2141 {
2142 return repo_config_get_bool(the_repository, key, dest);
2143 }
2144
2145 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2146 {
2147 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2148 }
2149
2150 int git_config_get_maybe_bool(const char *key, int *dest)
2151 {
2152 return repo_config_get_maybe_bool(the_repository, key, dest);
2153 }
2154
2155 int git_config_get_pathname(const char *key, const char **dest)
2156 {
2157 return repo_config_get_pathname(the_repository, key, dest);
2158 }
2159
2160 /*
2161 * Note: This function exists solely to maintain backward compatibility with
2162 * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
2163 * NOT be used anywhere else.
2164 *
2165 * Runs the provided config function on the '.gitmodules' file found in the
2166 * working directory.
2167 */
2168 void config_from_gitmodules(config_fn_t fn, void *data)
2169 {
2170 if (the_repository->worktree) {
2171 char *file = repo_worktree_path(the_repository, GITMODULES_FILE);
2172 git_config_from_file(fn, file, data);
2173 free(file);
2174 }
2175 }
2176
2177 int git_config_get_expiry(const char *key, const char **output)
2178 {
2179 int ret = git_config_get_string_const(key, output);
2180 if (ret)
2181 return ret;
2182 if (strcmp(*output, "now")) {
2183 timestamp_t now = approxidate("now");
2184 if (approxidate(*output) >= now)
2185 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2186 }
2187 return ret;
2188 }
2189
2190 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2191 {
2192 char *expiry_string;
2193 intmax_t days;
2194 timestamp_t when;
2195
2196 if (git_config_get_string(key, &expiry_string))
2197 return 1; /* no such thing */
2198
2199 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2200 const int scale = 86400;
2201 *expiry = now - days * scale;
2202 return 0;
2203 }
2204
2205 if (!parse_expiry_date(expiry_string, &when)) {
2206 *expiry = when;
2207 return 0;
2208 }
2209 return -1; /* thing exists but cannot be parsed */
2210 }
2211
2212 int git_config_get_untracked_cache(void)
2213 {
2214 int val = -1;
2215 const char *v;
2216
2217 /* Hack for test programs like test-dump-untracked-cache */
2218 if (ignore_untracked_cache_config)
2219 return -1;
2220
2221 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2222 return val;
2223
2224 if (!git_config_get_value("core.untrackedcache", &v)) {
2225 if (!strcasecmp(v, "keep"))
2226 return -1;
2227
2228 error(_("unknown core.untrackedCache value '%s'; "
2229 "using 'keep' default value"), v);
2230 return -1;
2231 }
2232
2233 return -1; /* default value */
2234 }
2235
2236 int git_config_get_split_index(void)
2237 {
2238 int val;
2239
2240 if (!git_config_get_maybe_bool("core.splitindex", &val))
2241 return val;
2242
2243 return -1; /* default value */
2244 }
2245
2246 int git_config_get_max_percent_split_change(void)
2247 {
2248 int val = -1;
2249
2250 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2251 if (0 <= val && val <= 100)
2252 return val;
2253
2254 return error(_("splitIndex.maxPercentChange value '%d' "
2255 "should be between 0 and 100"), val);
2256 }
2257
2258 return -1; /* default value */
2259 }
2260
2261 int git_config_get_fsmonitor(void)
2262 {
2263 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2264 core_fsmonitor = getenv("GIT_FSMONITOR_TEST");
2265
2266 if (core_fsmonitor && !*core_fsmonitor)
2267 core_fsmonitor = NULL;
2268
2269 if (core_fsmonitor)
2270 return 1;
2271
2272 return 0;
2273 }
2274
2275 NORETURN
2276 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2277 {
2278 if (!filename)
2279 die(_("unable to parse '%s' from command-line config"), key);
2280 else
2281 die(_("bad config variable '%s' in file '%s' at line %d"),
2282 key, filename, linenr);
2283 }
2284
2285 NORETURN __attribute__((format(printf, 2, 3)))
2286 void git_die_config(const char *key, const char *err, ...)
2287 {
2288 const struct string_list *values;
2289 struct key_value_info *kv_info;
2290
2291 if (err) {
2292 va_list params;
2293 va_start(params, err);
2294 vreportf("error: ", err, params);
2295 va_end(params);
2296 }
2297 values = git_config_get_value_multi(key);
2298 kv_info = values->items[values->nr - 1].util;
2299 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2300 }
2301
2302 /*
2303 * Find all the stuff for git_config_set() below.
2304 */
2305
2306 struct config_store_data {
2307 int baselen;
2308 char *key;
2309 int do_not_match;
2310 regex_t *value_regex;
2311 int multi_replace;
2312 struct {
2313 size_t begin, end;
2314 enum config_event_t type;
2315 int is_keys_section;
2316 } *parsed;
2317 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2318 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2319 };
2320
2321 static int matches(const char *key, const char *value,
2322 const struct config_store_data *store)
2323 {
2324 if (strcmp(key, store->key))
2325 return 0; /* not ours */
2326 if (!store->value_regex)
2327 return 1; /* always matches */
2328 if (store->value_regex == CONFIG_REGEX_NONE)
2329 return 0; /* never matches */
2330
2331 return store->do_not_match ^
2332 (value && !regexec(store->value_regex, value, 0, NULL, 0));
2333 }
2334
2335 static int store_aux_event(enum config_event_t type,
2336 size_t begin, size_t end, void *data)
2337 {
2338 struct config_store_data *store = data;
2339
2340 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2341 store->parsed[store->parsed_nr].begin = begin;
2342 store->parsed[store->parsed_nr].end = end;
2343 store->parsed[store->parsed_nr].type = type;
2344
2345 if (type == CONFIG_EVENT_SECTION) {
2346 if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
2347 BUG("Invalid section name '%s'", cf->var.buf);
2348
2349 /* Is this the section we were looking for? */
2350 store->is_keys_section =
2351 store->parsed[store->parsed_nr].is_keys_section =
2352 cf->var.len - 1 == store->baselen &&
2353 !strncasecmp(cf->var.buf, store->key, store->baselen);
2354 if (store->is_keys_section) {
2355 store->section_seen = 1;
2356 ALLOC_GROW(store->seen, store->seen_nr + 1,
2357 store->seen_alloc);
2358 store->seen[store->seen_nr] = store->parsed_nr;
2359 }
2360 }
2361
2362 store->parsed_nr++;
2363
2364 return 0;
2365 }
2366
2367 static int store_aux(const char *key, const char *value, void *cb)
2368 {
2369 struct config_store_data *store = cb;
2370
2371 if (store->key_seen) {
2372 if (matches(key, value, store)) {
2373 if (store->seen_nr == 1 && store->multi_replace == 0) {
2374 warning(_("%s has multiple values"), key);
2375 }
2376
2377 ALLOC_GROW(store->seen, store->seen_nr + 1,
2378 store->seen_alloc);
2379
2380 store->seen[store->seen_nr] = store->parsed_nr;
2381 store->seen_nr++;
2382 }
2383 } else if (store->is_keys_section) {
2384 /*
2385 * Do not increment matches yet: this may not be a match, but we
2386 * are in the desired section.
2387 */
2388 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2389 store->seen[store->seen_nr] = store->parsed_nr;
2390 store->section_seen = 1;
2391
2392 if (matches(key, value, store)) {
2393 store->seen_nr++;
2394 store->key_seen = 1;
2395 }
2396 }
2397
2398 return 0;
2399 }
2400
2401 static int write_error(const char *filename)
2402 {
2403 error("failed to write new configuration file %s", filename);
2404
2405 /* Same error code as "failed to rename". */
2406 return 4;
2407 }
2408
2409 static struct strbuf store_create_section(const char *key,
2410 const struct config_store_data *store)
2411 {
2412 const char *dot;
2413 int i;
2414 struct strbuf sb = STRBUF_INIT;
2415
2416 dot = memchr(key, '.', store->baselen);
2417 if (dot) {
2418 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2419 for (i = dot - key + 1; i < store->baselen; i++) {
2420 if (key[i] == '"' || key[i] == '\\')
2421 strbuf_addch(&sb, '\\');
2422 strbuf_addch(&sb, key[i]);
2423 }
2424 strbuf_addstr(&sb, "\"]\n");
2425 } else {
2426 strbuf_addf(&sb, "[%.*s]\n", store->baselen, key);
2427 }
2428
2429 return sb;
2430 }
2431
2432 static ssize_t write_section(int fd, const char *key,
2433 const struct config_store_data *store)
2434 {
2435 struct strbuf sb = store_create_section(key, store);
2436 ssize_t ret;
2437
2438 ret = write_in_full(fd, sb.buf, sb.len);
2439 strbuf_release(&sb);
2440
2441 return ret;
2442 }
2443
2444 static ssize_t write_pair(int fd, const char *key, const char *value,
2445 const struct config_store_data *store)
2446 {
2447 int i;
2448 ssize_t ret;
2449 int length = strlen(key + store->baselen + 1);
2450 const char *quote = "";
2451 struct strbuf sb = STRBUF_INIT;
2452
2453 /*
2454 * Check to see if the value needs to be surrounded with a dq pair.
2455 * Note that problematic characters are always backslash-quoted; this
2456 * check is about not losing leading or trailing SP and strings that
2457 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2458 * configuration parser.
2459 */
2460 if (value[0] == ' ')
2461 quote = "\"";
2462 for (i = 0; value[i]; i++)
2463 if (value[i] == ';' || value[i] == '#')
2464 quote = "\"";
2465 if (i && value[i - 1] == ' ')
2466 quote = "\"";
2467
2468 strbuf_addf(&sb, "\t%.*s = %s",
2469 length, key + store->baselen + 1, quote);
2470
2471 for (i = 0; value[i]; i++)
2472 switch (value[i]) {
2473 case '\n':
2474 strbuf_addstr(&sb, "\\n");
2475 break;
2476 case '\t':
2477 strbuf_addstr(&sb, "\\t");
2478 break;
2479 case '"':
2480 case '\\':
2481 strbuf_addch(&sb, '\\');
2482 /* fallthrough */
2483 default:
2484 strbuf_addch(&sb, value[i]);
2485 break;
2486 }
2487 strbuf_addf(&sb, "%s\n", quote);
2488
2489 ret = write_in_full(fd, sb.buf, sb.len);
2490 strbuf_release(&sb);
2491
2492 return ret;
2493 }
2494
2495 /*
2496 * If we are about to unset the last key(s) in a section, and if there are
2497 * no comments surrounding (or included in) the section, we will want to
2498 * extend begin/end to remove the entire section.
2499 *
2500 * Note: the parameter `seen_ptr` points to the index into the store.seen
2501 * array. * This index may be incremented if a section has more than one
2502 * entry (which all are to be removed).
2503 */
2504 static void maybe_remove_section(struct config_store_data *store,
2505 const char *contents,
2506 size_t *begin_offset, size_t *end_offset,
2507 int *seen_ptr)
2508 {
2509 size_t begin;
2510 int i, seen, section_seen = 0;
2511
2512 /*
2513 * First, ensure that this is the first key, and that there are no
2514 * comments before the entry nor before the section header.
2515 */
2516 seen = *seen_ptr;
2517 for (i = store->seen[seen]; i > 0; i--) {
2518 enum config_event_t type = store->parsed[i - 1].type;
2519
2520 if (type == CONFIG_EVENT_COMMENT)
2521 /* There is a comment before this entry or section */
2522 return;
2523 if (type == CONFIG_EVENT_ENTRY) {
2524 if (!section_seen)
2525 /* This is not the section's first entry. */
2526 return;
2527 /* We encountered no comment before the section. */
2528 break;
2529 }
2530 if (type == CONFIG_EVENT_SECTION) {
2531 if (!store->parsed[i - 1].is_keys_section)
2532 break;
2533 section_seen = 1;
2534 }
2535 }
2536 begin = store->parsed[i].begin;
2537
2538 /*
2539 * Next, make sure that we are removing he last key(s) in the section,
2540 * and that there are no comments that are possibly about the current
2541 * section.
2542 */
2543 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
2544 enum config_event_t type = store->parsed[i].type;
2545
2546 if (type == CONFIG_EVENT_COMMENT)
2547 return;
2548 if (type == CONFIG_EVENT_SECTION) {
2549 if (store->parsed[i].is_keys_section)
2550 continue;
2551 break;
2552 }
2553 if (type == CONFIG_EVENT_ENTRY) {
2554 if (++seen < store->seen_nr &&
2555 i == store->seen[seen])
2556 /* We want to remove this entry, too */
2557 continue;
2558 /* There is another entry in this section. */
2559 return;
2560 }
2561 }
2562
2563 /*
2564 * We are really removing the last entry/entries from this section, and
2565 * there are no enclosed or surrounding comments. Remove the entire,
2566 * now-empty section.
2567 */
2568 *seen_ptr = seen;
2569 *begin_offset = begin;
2570 if (i < store->parsed_nr)
2571 *end_offset = store->parsed[i].begin;
2572 else
2573 *end_offset = store->parsed[store->parsed_nr - 1].end;
2574 }
2575
2576 int git_config_set_in_file_gently(const char *config_filename,
2577 const char *key, const char *value)
2578 {
2579 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2580 }
2581
2582 void git_config_set_in_file(const char *config_filename,
2583 const char *key, const char *value)
2584 {
2585 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2586 }
2587
2588 int git_config_set_gently(const char *key, const char *value)
2589 {
2590 return git_config_set_multivar_gently(key, value, NULL, 0);
2591 }
2592
2593 void git_config_set(const char *key, const char *value)
2594 {
2595 git_config_set_multivar(key, value, NULL, 0);
2596 }
2597
2598 /*
2599 * If value==NULL, unset in (remove from) config,
2600 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2601 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2602 * (only add a new one)
2603 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2604 * else all matching key/values (regardless how many) are removed,
2605 * before the new pair is written.
2606 *
2607 * Returns 0 on success.
2608 *
2609 * This function does this:
2610 *
2611 * - it locks the config file by creating ".git/config.lock"
2612 *
2613 * - it then parses the config using store_aux() as validator to find
2614 * the position on the key/value pair to replace. If it is to be unset,
2615 * it must be found exactly once.
2616 *
2617 * - the config file is mmap()ed and the part before the match (if any) is
2618 * written to the lock file, then the changed part and the rest.
2619 *
2620 * - the config file is removed and the lock file rename()d to it.
2621 *
2622 */
2623 int git_config_set_multivar_in_file_gently(const char *config_filename,
2624 const char *key, const char *value,
2625 const char *value_regex,
2626 int multi_replace)
2627 {
2628 int fd = -1, in_fd = -1;
2629 int ret;
2630 struct lock_file lock = LOCK_INIT;
2631 char *filename_buf = NULL;
2632 char *contents = NULL;
2633 size_t contents_sz;
2634 struct config_store_data store;
2635
2636 memset(&store, 0, sizeof(store));
2637
2638 /* parse-key returns negative; flip the sign to feed exit(3) */
2639 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2640 if (ret)
2641 goto out_free;
2642
2643 store.multi_replace = multi_replace;
2644
2645 if (!config_filename)
2646 config_filename = filename_buf = git_pathdup("config");
2647
2648 /*
2649 * The lock serves a purpose in addition to locking: the new
2650 * contents of .git/config will be written into it.
2651 */
2652 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2653 if (fd < 0) {
2654 error_errno("could not lock config file %s", config_filename);
2655 free(store.key);
2656 ret = CONFIG_NO_LOCK;
2657 goto out_free;
2658 }
2659
2660 /*
2661 * If .git/config does not exist yet, write a minimal version.
2662 */
2663 in_fd = open(config_filename, O_RDONLY);
2664 if ( in_fd < 0 ) {
2665 free(store.key);
2666
2667 if ( ENOENT != errno ) {
2668 error_errno("opening %s", config_filename);
2669 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2670 goto out_free;
2671 }
2672 /* if nothing to unset, error out */
2673 if (value == NULL) {
2674 ret = CONFIG_NOTHING_SET;
2675 goto out_free;
2676 }
2677
2678 store.key = (char *)key;
2679 if (write_section(fd, key, &store) < 0 ||
2680 write_pair(fd, key, value, &store) < 0)
2681 goto write_err_out;
2682 } else {
2683 struct stat st;
2684 size_t copy_begin, copy_end;
2685 int i, new_line = 0;
2686 struct config_options opts;
2687
2688 if (value_regex == NULL)
2689 store.value_regex = NULL;
2690 else if (value_regex == CONFIG_REGEX_NONE)
2691 store.value_regex = CONFIG_REGEX_NONE;
2692 else {
2693 if (value_regex[0] == '!') {
2694 store.do_not_match = 1;
2695 value_regex++;
2696 } else
2697 store.do_not_match = 0;
2698
2699 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2700 if (regcomp(store.value_regex, value_regex,
2701 REG_EXTENDED)) {
2702 error("invalid pattern: %s", value_regex);
2703 free(store.value_regex);
2704 ret = CONFIG_INVALID_PATTERN;
2705 goto out_free;
2706 }
2707 }
2708
2709 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
2710 store.parsed[0].end = 0;
2711
2712 memset(&opts, 0, sizeof(opts));
2713 opts.event_fn = store_aux_event;
2714 opts.event_fn_data = &store;
2715
2716 /*
2717 * After this, store.parsed will contain offsets of all the
2718 * parsed elements, and store.seen will contain a list of
2719 * matches, as indices into store.parsed.
2720 *
2721 * As a side effect, we make sure to transform only a valid
2722 * existing config file.
2723 */
2724 if (git_config_from_file_with_options(store_aux,
2725 config_filename,
2726 &store, &opts)) {
2727 error("invalid config file %s", config_filename);
2728 free(store.key);
2729 if (store.value_regex != NULL &&
2730 store.value_regex != CONFIG_REGEX_NONE) {
2731 regfree(store.value_regex);
2732 free(store.value_regex);
2733 }
2734 ret = CONFIG_INVALID_FILE;
2735 goto out_free;
2736 }
2737
2738 free(store.key);
2739 if (store.value_regex != NULL &&
2740 store.value_regex != CONFIG_REGEX_NONE) {
2741 regfree(store.value_regex);
2742 free(store.value_regex);
2743 }
2744
2745 /* if nothing to unset, or too many matches, error out */
2746 if ((store.seen_nr == 0 && value == NULL) ||
2747 (store.seen_nr > 1 && multi_replace == 0)) {
2748 ret = CONFIG_NOTHING_SET;
2749 goto out_free;
2750 }
2751
2752 if (fstat(in_fd, &st) == -1) {
2753 error_errno(_("fstat on %s failed"), config_filename);
2754 ret = CONFIG_INVALID_FILE;
2755 goto out_free;
2756 }
2757
2758 contents_sz = xsize_t(st.st_size);
2759 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2760 MAP_PRIVATE, in_fd, 0);
2761 if (contents == MAP_FAILED) {
2762 if (errno == ENODEV && S_ISDIR(st.st_mode))
2763 errno = EISDIR;
2764 error_errno("unable to mmap '%s'", config_filename);
2765 ret = CONFIG_INVALID_FILE;
2766 contents = NULL;
2767 goto out_free;
2768 }
2769 close(in_fd);
2770 in_fd = -1;
2771
2772 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2773 error_errno("chmod on %s failed", get_lock_file_path(&lock));
2774 ret = CONFIG_NO_WRITE;
2775 goto out_free;
2776 }
2777
2778 if (store.seen_nr == 0) {
2779 if (!store.seen_alloc) {
2780 /* Did not see key nor section */
2781 ALLOC_GROW(store.seen, 1, store.seen_alloc);
2782 store.seen[0] = store.parsed_nr
2783 - !!store.parsed_nr;
2784 }
2785 store.seen_nr = 1;
2786 }
2787
2788 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
2789 size_t replace_end;
2790 int j = store.seen[i];
2791
2792 new_line = 0;
2793 if (!store.key_seen) {
2794 copy_end = store.parsed[j].end;
2795 /* include '\n' when copying section header */
2796 if (copy_end > 0 && copy_end < contents_sz &&
2797 contents[copy_end - 1] != '\n' &&
2798 contents[copy_end] == '\n')
2799 copy_end++;
2800 replace_end = copy_end;
2801 } else {
2802 replace_end = store.parsed[j].end;
2803 copy_end = store.parsed[j].begin;
2804 if (!value)
2805 maybe_remove_section(&store, contents,
2806 &copy_end,
2807 &replace_end, &i);
2808 /*
2809 * Swallow preceding white-space on the same
2810 * line.
2811 */
2812 while (copy_end > 0 ) {
2813 char c = contents[copy_end - 1];
2814
2815 if (isspace(c) && c != '\n')
2816 copy_end--;
2817 else
2818 break;
2819 }
2820 }
2821
2822 if (copy_end > 0 && contents[copy_end-1] != '\n')
2823 new_line = 1;
2824
2825 /* write the first part of the config */
2826 if (copy_end > copy_begin) {
2827 if (write_in_full(fd, contents + copy_begin,
2828 copy_end - copy_begin) < 0)
2829 goto write_err_out;
2830 if (new_line &&
2831 write_str_in_full(fd, "\n") < 0)
2832 goto write_err_out;
2833 }
2834 copy_begin = replace_end;
2835 }
2836
2837 /* write the pair (value == NULL means unset) */
2838 if (value != NULL) {
2839 if (!store.section_seen) {
2840 if (write_section(fd, key, &store) < 0)
2841 goto write_err_out;
2842 }
2843 if (write_pair(fd, key, value, &store) < 0)
2844 goto write_err_out;
2845 }
2846
2847 /* write the rest of the config */
2848 if (copy_begin < contents_sz)
2849 if (write_in_full(fd, contents + copy_begin,
2850 contents_sz - copy_begin) < 0)
2851 goto write_err_out;
2852
2853 munmap(contents, contents_sz);
2854 contents = NULL;
2855 }
2856
2857 if (commit_lock_file(&lock) < 0) {
2858 error_errno("could not write config file %s", config_filename);
2859 ret = CONFIG_NO_WRITE;
2860 goto out_free;
2861 }
2862
2863 ret = 0;
2864
2865 /* Invalidate the config cache */
2866 git_config_clear();
2867
2868 out_free:
2869 rollback_lock_file(&lock);
2870 free(filename_buf);
2871 if (contents)
2872 munmap(contents, contents_sz);
2873 if (in_fd >= 0)
2874 close(in_fd);
2875 return ret;
2876
2877 write_err_out:
2878 ret = write_error(get_lock_file_path(&lock));
2879 goto out_free;
2880
2881 }
2882
2883 void git_config_set_multivar_in_file(const char *config_filename,
2884 const char *key, const char *value,
2885 const char *value_regex, int multi_replace)
2886 {
2887 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2888 value_regex, multi_replace))
2889 return;
2890 if (value)
2891 die(_("could not set '%s' to '%s'"), key, value);
2892 else
2893 die(_("could not unset '%s'"), key);
2894 }
2895
2896 int git_config_set_multivar_gently(const char *key, const char *value,
2897 const char *value_regex, int multi_replace)
2898 {
2899 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2900 multi_replace);
2901 }
2902
2903 void git_config_set_multivar(const char *key, const char *value,
2904 const char *value_regex, int multi_replace)
2905 {
2906 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2907 multi_replace);
2908 }
2909
2910 static int section_name_match (const char *buf, const char *name)
2911 {
2912 int i = 0, j = 0, dot = 0;
2913 if (buf[i] != '[')
2914 return 0;
2915 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2916 if (!dot && isspace(buf[i])) {
2917 dot = 1;
2918 if (name[j++] != '.')
2919 break;
2920 for (i++; isspace(buf[i]); i++)
2921 ; /* do nothing */
2922 if (buf[i] != '"')
2923 break;
2924 continue;
2925 }
2926 if (buf[i] == '\\' && dot)
2927 i++;
2928 else if (buf[i] == '"' && dot) {
2929 for (i++; isspace(buf[i]); i++)
2930 ; /* do_nothing */
2931 break;
2932 }
2933 if (buf[i] != name[j++])
2934 break;
2935 }
2936 if (buf[i] == ']' && name[j] == 0) {
2937 /*
2938 * We match, now just find the right length offset by
2939 * gobbling up any whitespace after it, as well
2940 */
2941 i++;
2942 for (; buf[i] && isspace(buf[i]); i++)
2943 ; /* do nothing */
2944 return i;
2945 }
2946 return 0;
2947 }
2948
2949 static int section_name_is_ok(const char *name)
2950 {
2951 /* Empty section names are bogus. */
2952 if (!*name)
2953 return 0;
2954
2955 /*
2956 * Before a dot, we must be alphanumeric or dash. After the first dot,
2957 * anything goes, so we can stop checking.
2958 */
2959 for (; *name && *name != '.'; name++)
2960 if (*name != '-' && !isalnum(*name))
2961 return 0;
2962 return 1;
2963 }
2964
2965 /* if new_name == NULL, the section is removed instead */
2966 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
2967 const char *old_name,
2968 const char *new_name, int copy)
2969 {
2970 int ret = 0, remove = 0;
2971 char *filename_buf = NULL;
2972 struct lock_file lock = LOCK_INIT;
2973 int out_fd;
2974 char buf[1024];
2975 FILE *config_file = NULL;
2976 struct stat st;
2977 struct strbuf copystr = STRBUF_INIT;
2978 struct config_store_data store;
2979
2980 memset(&store, 0, sizeof(store));
2981
2982 if (new_name && !section_name_is_ok(new_name)) {
2983 ret = error("invalid section name: %s", new_name);
2984 goto out_no_rollback;
2985 }
2986
2987 if (!config_filename)
2988 config_filename = filename_buf = git_pathdup("config");
2989
2990 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
2991 if (out_fd < 0) {
2992 ret = error("could not lock config file %s", config_filename);
2993 goto out;
2994 }
2995
2996 if (!(config_file = fopen(config_filename, "rb"))) {
2997 ret = warn_on_fopen_errors(config_filename);
2998 if (ret)
2999 goto out;
3000 /* no config file means nothing to rename, no error */
3001 goto commit_and_out;
3002 }
3003
3004 if (fstat(fileno(config_file), &st) == -1) {
3005 ret = error_errno(_("fstat on %s failed"), config_filename);
3006 goto out;
3007 }
3008
3009 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3010 ret = error_errno("chmod on %s failed",
3011 get_lock_file_path(&lock));
3012 goto out;
3013 }
3014
3015 while (fgets(buf, sizeof(buf), config_file)) {
3016 int i;
3017 int length;
3018 int is_section = 0;
3019 char *output = buf;
3020 for (i = 0; buf[i] && isspace(buf[i]); i++)
3021 ; /* do nothing */
3022 if (buf[i] == '[') {
3023 /* it's a section */
3024 int offset;
3025 is_section = 1;
3026
3027 /*
3028 * When encountering a new section under -c we
3029 * need to flush out any section we're already
3030 * coping and begin anew. There might be
3031 * multiple [branch "$name"] sections.
3032 */
3033 if (copystr.len > 0) {
3034 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3035 ret = write_error(get_lock_file_path(&lock));
3036 goto out;
3037 }
3038 strbuf_reset(&copystr);
3039 }
3040
3041 offset = section_name_match(&buf[i], old_name);
3042 if (offset > 0) {
3043 ret++;
3044 if (new_name == NULL) {
3045 remove = 1;
3046 continue;
3047 }
3048 store.baselen = strlen(new_name);
3049 if (!copy) {
3050 if (write_section(out_fd, new_name, &store) < 0) {
3051 ret = write_error(get_lock_file_path(&lock));
3052 goto out;
3053 }
3054 /*
3055 * We wrote out the new section, with
3056 * a newline, now skip the old
3057 * section's length
3058 */
3059 output += offset + i;
3060 if (strlen(output) > 0) {
3061 /*
3062 * More content means there's
3063 * a declaration to put on the
3064 * next line; indent with a
3065 * tab
3066 */
3067 output -= 1;
3068 output[0] = '\t';
3069 }
3070 } else {
3071 copystr = store_create_section(new_name, &store);
3072 }
3073 }
3074 remove = 0;
3075 }
3076 if (remove)
3077 continue;
3078 length = strlen(output);
3079
3080 if (!is_section && copystr.len > 0) {
3081 strbuf_add(&copystr, output, length);
3082 }
3083
3084 if (write_in_full(out_fd, output, length) < 0) {
3085 ret = write_error(get_lock_file_path(&lock));
3086 goto out;
3087 }
3088 }
3089
3090 /*
3091 * Copy a trailing section at the end of the config, won't be
3092 * flushed by the usual "flush because we have a new section
3093 * logic in the loop above.
3094 */
3095 if (copystr.len > 0) {
3096 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3097 ret = write_error(get_lock_file_path(&lock));
3098 goto out;
3099 }
3100 strbuf_reset(&copystr);
3101 }
3102
3103 fclose(config_file);
3104 config_file = NULL;
3105 commit_and_out:
3106 if (commit_lock_file(&lock) < 0)
3107 ret = error_errno("could not write config file %s",
3108 config_filename);
3109 out:
3110 if (config_file)
3111 fclose(config_file);
3112 rollback_lock_file(&lock);
3113 out_no_rollback:
3114 free(filename_buf);
3115 return ret;
3116 }
3117
3118 int git_config_rename_section_in_file(const char *config_filename,
3119 const char *old_name, const char *new_name)
3120 {
3121 return git_config_copy_or_rename_section_in_file(config_filename,
3122 old_name, new_name, 0);
3123 }
3124
3125 int git_config_rename_section(const char *old_name, const char *new_name)
3126 {
3127 return git_config_rename_section_in_file(NULL, old_name, new_name);
3128 }
3129
3130 int git_config_copy_section_in_file(const char *config_filename,
3131 const char *old_name, const char *new_name)
3132 {
3133 return git_config_copy_or_rename_section_in_file(config_filename,
3134 old_name, new_name, 1);
3135 }
3136
3137 int git_config_copy_section(const char *old_name, const char *new_name)
3138 {
3139 return git_config_copy_section_in_file(NULL, old_name, new_name);
3140 }
3141
3142 /*
3143 * Call this to report error for your variable that should not
3144 * get a boolean value (i.e. "[my] var" means "true").
3145 */
3146 #undef config_error_nonbool
3147 int config_error_nonbool(const char *var)
3148 {
3149 return error("missing value for '%s'", var);
3150 }
3151
3152 int parse_config_key(const char *var,
3153 const char *section,
3154 const char **subsection, int *subsection_len,
3155 const char **key)
3156 {
3157 const char *dot;
3158
3159 /* Does it start with "section." ? */
3160 if (!skip_prefix(var, section, &var) || *var != '.')
3161 return -1;
3162
3163 /*
3164 * Find the key; we don't know yet if we have a subsection, but we must
3165 * parse backwards from the end, since the subsection may have dots in
3166 * it, too.
3167 */
3168 dot = strrchr(var, '.');
3169 *key = dot + 1;
3170
3171 /* Did we have a subsection at all? */
3172 if (dot == var) {
3173 if (subsection) {
3174 *subsection = NULL;
3175 *subsection_len = 0;
3176 }
3177 }
3178 else {
3179 if (!subsection)
3180 return -1;
3181 *subsection = var + 1;
3182 *subsection_len = dot - *subsection;
3183 }
3184
3185 return 0;
3186 }
3187
3188 const char *current_config_origin_type(void)
3189 {
3190 int type;
3191 if (current_config_kvi)
3192 type = current_config_kvi->origin_type;
3193 else if(cf)
3194 type = cf->origin_type;
3195 else
3196 die("BUG: current_config_origin_type called outside config callback");
3197
3198 switch (type) {
3199 case CONFIG_ORIGIN_BLOB:
3200 return "blob";
3201 case CONFIG_ORIGIN_FILE:
3202 return "file";
3203 case CONFIG_ORIGIN_STDIN:
3204 return "standard input";
3205 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3206 return "submodule-blob";
3207 case CONFIG_ORIGIN_CMDLINE:
3208 return "command line";
3209 default:
3210 die("BUG: unknown config origin type");
3211 }
3212 }
3213
3214 const char *current_config_name(void)
3215 {
3216 const char *name;
3217 if (current_config_kvi)
3218 name = current_config_kvi->filename;
3219 else if (cf)
3220 name = cf->name;
3221 else
3222 die("BUG: current_config_name called outside config callback");
3223 return name ? name : "";
3224 }
3225
3226 enum config_scope current_config_scope(void)
3227 {
3228 if (current_config_kvi)
3229 return current_config_kvi->scope;
3230 else
3231 return current_parsing_scope;
3232 }