checkout-index: fix --temp relative path mangling
[git.git] / config.c
blob61a9c296f48c929177835c6128133449a1e14a6b
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
13 struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
22 } u;
23 const char *name;
24 const char *path;
25 int die_on_error;
26 int linenr;
27 int eof;
28 struct strbuf value;
29 struct strbuf var;
31 int (*do_fgetc)(struct config_source *c);
32 int (*do_ungetc)(int c, struct config_source *conf);
33 long (*do_ftell)(struct config_source *c);
36 static struct config_source *cf;
38 static int zlib_compression_seen;
40 static int config_file_fgetc(struct config_source *conf)
42 return fgetc(conf->u.file);
45 static int config_file_ungetc(int c, struct config_source *conf)
47 return ungetc(c, conf->u.file);
50 static long config_file_ftell(struct config_source *conf)
52 return ftell(conf->u.file);
56 static int config_buf_fgetc(struct config_source *conf)
58 if (conf->u.buf.pos < conf->u.buf.len)
59 return conf->u.buf.buf[conf->u.buf.pos++];
61 return EOF;
64 static int config_buf_ungetc(int c, struct config_source *conf)
66 if (conf->u.buf.pos > 0)
67 return conf->u.buf.buf[--conf->u.buf.pos];
69 return EOF;
72 static long config_buf_ftell(struct config_source *conf)
74 return conf->u.buf.pos;
77 #define MAX_INCLUDE_DEPTH 10
78 static const char include_depth_advice[] =
79 "exceeded maximum include depth (%d) while including\n"
80 " %s\n"
81 "from\n"
82 " %s\n"
83 "Do you have circular includes?";
84 static int handle_path_include(const char *path, struct config_include_data *inc)
86 int ret = 0;
87 struct strbuf buf = STRBUF_INIT;
88 char *expanded;
90 if (!path)
91 return config_error_nonbool("include.path");
93 expanded = expand_user_path(path);
94 if (!expanded)
95 return error("Could not expand include path '%s'", path);
96 path = expanded;
99 * Use an absolute path as-is, but interpret relative paths
100 * based on the including config file.
102 if (!is_absolute_path(path)) {
103 char *slash;
105 if (!cf || !cf->path)
106 return error("relative config includes must come from files");
108 slash = find_last_dir_sep(cf->path);
109 if (slash)
110 strbuf_add(&buf, cf->path, slash - cf->path + 1);
111 strbuf_addstr(&buf, path);
112 path = buf.buf;
115 if (!access_or_die(path, R_OK, 0)) {
116 if (++inc->depth > MAX_INCLUDE_DEPTH)
117 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
118 cf && cf->name ? cf->name : "the command line");
119 ret = git_config_from_file(git_config_include, path, inc);
120 inc->depth--;
122 strbuf_release(&buf);
123 free(expanded);
124 return ret;
127 int git_config_include(const char *var, const char *value, void *data)
129 struct config_include_data *inc = data;
130 const char *type;
131 int ret;
134 * Pass along all values, including "include" directives; this makes it
135 * possible to query information on the includes themselves.
137 ret = inc->fn(var, value, inc->data);
138 if (ret < 0)
139 return ret;
141 type = skip_prefix(var, "include.");
142 if (!type)
143 return ret;
145 if (!strcmp(type, "path"))
146 ret = handle_path_include(value, inc);
147 return ret;
150 static void lowercase(char *p)
152 for (; *p; p++)
153 *p = tolower(*p);
156 void git_config_push_parameter(const char *text)
158 struct strbuf env = STRBUF_INIT;
159 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
160 if (old) {
161 strbuf_addstr(&env, old);
162 strbuf_addch(&env, ' ');
164 sq_quote_buf(&env, text);
165 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
166 strbuf_release(&env);
169 int git_config_parse_parameter(const char *text,
170 config_fn_t fn, void *data)
172 struct strbuf **pair;
173 pair = strbuf_split_str(text, '=', 2);
174 if (!pair[0])
175 return error("bogus config parameter: %s", text);
176 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
177 strbuf_setlen(pair[0], pair[0]->len - 1);
178 strbuf_trim(pair[0]);
179 if (!pair[0]->len) {
180 strbuf_list_free(pair);
181 return error("bogus config parameter: %s", text);
183 lowercase(pair[0]->buf);
184 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
185 strbuf_list_free(pair);
186 return -1;
188 strbuf_list_free(pair);
189 return 0;
192 int git_config_from_parameters(config_fn_t fn, void *data)
194 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
195 char *envw;
196 const char **argv = NULL;
197 int nr = 0, alloc = 0;
198 int i;
200 if (!env)
201 return 0;
202 /* sq_dequote will write over it */
203 envw = xstrdup(env);
205 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
206 free(envw);
207 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
210 for (i = 0; i < nr; i++) {
211 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
212 free(argv);
213 free(envw);
214 return -1;
218 free(argv);
219 free(envw);
220 return nr > 0;
223 static int get_next_char(void)
225 int c = cf->do_fgetc(cf);
227 if (c == '\r') {
228 /* DOS like systems */
229 c = cf->do_fgetc(cf);
230 if (c != '\n') {
231 cf->do_ungetc(c, cf);
232 c = '\r';
235 if (c == '\n')
236 cf->linenr++;
237 if (c == EOF) {
238 cf->eof = 1;
239 c = '\n';
241 return c;
244 static char *parse_value(void)
246 int quote = 0, comment = 0, space = 0;
248 strbuf_reset(&cf->value);
249 for (;;) {
250 int c = get_next_char();
251 if (c == '\n') {
252 if (quote) {
253 cf->linenr--;
254 return NULL;
256 return cf->value.buf;
258 if (comment)
259 continue;
260 if (isspace(c) && !quote) {
261 if (cf->value.len)
262 space++;
263 continue;
265 if (!quote) {
266 if (c == ';' || c == '#') {
267 comment = 1;
268 continue;
271 for (; space; space--)
272 strbuf_addch(&cf->value, ' ');
273 if (c == '\\') {
274 c = get_next_char();
275 switch (c) {
276 case '\n':
277 continue;
278 case 't':
279 c = '\t';
280 break;
281 case 'b':
282 c = '\b';
283 break;
284 case 'n':
285 c = '\n';
286 break;
287 /* Some characters escape as themselves */
288 case '\\': case '"':
289 break;
290 /* Reject unknown escape sequences */
291 default:
292 return NULL;
294 strbuf_addch(&cf->value, c);
295 continue;
297 if (c == '"') {
298 quote = 1-quote;
299 continue;
301 strbuf_addch(&cf->value, c);
305 static inline int iskeychar(int c)
307 return isalnum(c) || c == '-';
310 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
312 int c;
313 char *value;
315 /* Get the full name */
316 for (;;) {
317 c = get_next_char();
318 if (cf->eof)
319 break;
320 if (!iskeychar(c))
321 break;
322 strbuf_addch(name, tolower(c));
325 while (c == ' ' || c == '\t')
326 c = get_next_char();
328 value = NULL;
329 if (c != '\n') {
330 if (c != '=')
331 return -1;
332 value = parse_value();
333 if (!value)
334 return -1;
336 return fn(name->buf, value, data);
339 static int get_extended_base_var(struct strbuf *name, int c)
341 do {
342 if (c == '\n')
343 goto error_incomplete_line;
344 c = get_next_char();
345 } while (isspace(c));
347 /* We require the format to be '[base "extension"]' */
348 if (c != '"')
349 return -1;
350 strbuf_addch(name, '.');
352 for (;;) {
353 int c = get_next_char();
354 if (c == '\n')
355 goto error_incomplete_line;
356 if (c == '"')
357 break;
358 if (c == '\\') {
359 c = get_next_char();
360 if (c == '\n')
361 goto error_incomplete_line;
363 strbuf_addch(name, c);
366 /* Final ']' */
367 if (get_next_char() != ']')
368 return -1;
369 return 0;
370 error_incomplete_line:
371 cf->linenr--;
372 return -1;
375 static int get_base_var(struct strbuf *name)
377 for (;;) {
378 int c = get_next_char();
379 if (cf->eof)
380 return -1;
381 if (c == ']')
382 return 0;
383 if (isspace(c))
384 return get_extended_base_var(name, c);
385 if (!iskeychar(c) && c != '.')
386 return -1;
387 strbuf_addch(name, tolower(c));
391 static int git_parse_source(config_fn_t fn, void *data)
393 int comment = 0;
394 int baselen = 0;
395 struct strbuf *var = &cf->var;
397 /* U+FEFF Byte Order Mark in UTF8 */
398 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
399 const unsigned char *bomptr = utf8_bom;
401 for (;;) {
402 int c = get_next_char();
403 if (bomptr && *bomptr) {
404 /* We are at the file beginning; skip UTF8-encoded BOM
405 * if present. Sane editors won't put this in on their
406 * own, but e.g. Windows Notepad will do it happily. */
407 if ((unsigned char) c == *bomptr) {
408 bomptr++;
409 continue;
410 } else {
411 /* Do not tolerate partial BOM. */
412 if (bomptr != utf8_bom)
413 break;
414 /* No BOM at file beginning. Cool. */
415 bomptr = NULL;
418 if (c == '\n') {
419 if (cf->eof)
420 return 0;
421 comment = 0;
422 continue;
424 if (comment || isspace(c))
425 continue;
426 if (c == '#' || c == ';') {
427 comment = 1;
428 continue;
430 if (c == '[') {
431 /* Reset prior to determining a new stem */
432 strbuf_reset(var);
433 if (get_base_var(var) < 0 || var->len < 1)
434 break;
435 strbuf_addch(var, '.');
436 baselen = var->len;
437 continue;
439 if (!isalpha(c))
440 break;
442 * Truncate the var name back to the section header
443 * stem prior to grabbing the suffix part of the name
444 * and the value.
446 strbuf_setlen(var, baselen);
447 strbuf_addch(var, tolower(c));
448 if (get_value(fn, data, var) < 0)
449 break;
451 if (cf->die_on_error)
452 die("bad config file line %d in %s", cf->linenr, cf->name);
453 else
454 return error("bad config file line %d in %s", cf->linenr, cf->name);
457 static int parse_unit_factor(const char *end, uintmax_t *val)
459 if (!*end)
460 return 1;
461 else if (!strcasecmp(end, "k")) {
462 *val *= 1024;
463 return 1;
465 else if (!strcasecmp(end, "m")) {
466 *val *= 1024 * 1024;
467 return 1;
469 else if (!strcasecmp(end, "g")) {
470 *val *= 1024 * 1024 * 1024;
471 return 1;
473 return 0;
476 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
478 if (value && *value) {
479 char *end;
480 intmax_t val;
481 uintmax_t uval;
482 uintmax_t factor = 1;
484 errno = 0;
485 val = strtoimax(value, &end, 0);
486 if (errno == ERANGE)
487 return 0;
488 if (!parse_unit_factor(end, &factor)) {
489 errno = EINVAL;
490 return 0;
492 uval = abs(val);
493 uval *= factor;
494 if (uval > max || abs(val) > uval) {
495 errno = ERANGE;
496 return 0;
498 val *= factor;
499 *ret = val;
500 return 1;
502 errno = EINVAL;
503 return 0;
506 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
508 if (value && *value) {
509 char *end;
510 uintmax_t val;
511 uintmax_t oldval;
513 errno = 0;
514 val = strtoumax(value, &end, 0);
515 if (errno == ERANGE)
516 return 0;
517 oldval = val;
518 if (!parse_unit_factor(end, &val)) {
519 errno = EINVAL;
520 return 0;
522 if (val > max || oldval > val) {
523 errno = ERANGE;
524 return 0;
526 *ret = val;
527 return 1;
529 errno = EINVAL;
530 return 0;
533 static int git_parse_int(const char *value, int *ret)
535 intmax_t tmp;
536 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
537 return 0;
538 *ret = tmp;
539 return 1;
542 static int git_parse_int64(const char *value, int64_t *ret)
544 intmax_t tmp;
545 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
546 return 0;
547 *ret = tmp;
548 return 1;
551 int git_parse_ulong(const char *value, unsigned long *ret)
553 uintmax_t tmp;
554 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
555 return 0;
556 *ret = tmp;
557 return 1;
560 NORETURN
561 static void die_bad_number(const char *name, const char *value)
563 const char *reason = errno == ERANGE ?
564 "out of range" :
565 "invalid unit";
566 if (!value)
567 value = "";
569 if (cf && cf->name)
570 die("bad numeric config value '%s' for '%s' in %s: %s",
571 value, name, cf->name, reason);
572 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
575 int git_config_int(const char *name, const char *value)
577 int ret;
578 if (!git_parse_int(value, &ret))
579 die_bad_number(name, value);
580 return ret;
583 int64_t git_config_int64(const char *name, const char *value)
585 int64_t ret;
586 if (!git_parse_int64(value, &ret))
587 die_bad_number(name, value);
588 return ret;
591 unsigned long git_config_ulong(const char *name, const char *value)
593 unsigned long ret;
594 if (!git_parse_ulong(value, &ret))
595 die_bad_number(name, value);
596 return ret;
599 static int git_config_maybe_bool_text(const char *name, const char *value)
601 if (!value)
602 return 1;
603 if (!*value)
604 return 0;
605 if (!strcasecmp(value, "true")
606 || !strcasecmp(value, "yes")
607 || !strcasecmp(value, "on"))
608 return 1;
609 if (!strcasecmp(value, "false")
610 || !strcasecmp(value, "no")
611 || !strcasecmp(value, "off"))
612 return 0;
613 return -1;
616 int git_config_maybe_bool(const char *name, const char *value)
618 int v = git_config_maybe_bool_text(name, value);
619 if (0 <= v)
620 return v;
621 if (git_parse_int(value, &v))
622 return !!v;
623 return -1;
626 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
628 int v = git_config_maybe_bool_text(name, value);
629 if (0 <= v) {
630 *is_bool = 1;
631 return v;
633 *is_bool = 0;
634 return git_config_int(name, value);
637 int git_config_bool(const char *name, const char *value)
639 int discard;
640 return !!git_config_bool_or_int(name, value, &discard);
643 int git_config_string(const char **dest, const char *var, const char *value)
645 if (!value)
646 return config_error_nonbool(var);
647 *dest = xstrdup(value);
648 return 0;
651 int git_config_pathname(const char **dest, const char *var, const char *value)
653 if (!value)
654 return config_error_nonbool(var);
655 *dest = expand_user_path(value);
656 if (!*dest)
657 die("Failed to expand user dir in: '%s'", value);
658 return 0;
661 static int git_default_core_config(const char *var, const char *value)
663 /* This needs a better name */
664 if (!strcmp(var, "core.filemode")) {
665 trust_executable_bit = git_config_bool(var, value);
666 return 0;
668 if (!strcmp(var, "core.trustctime")) {
669 trust_ctime = git_config_bool(var, value);
670 return 0;
672 if (!strcmp(var, "core.checkstat")) {
673 if (!strcasecmp(value, "default"))
674 check_stat = 1;
675 else if (!strcasecmp(value, "minimal"))
676 check_stat = 0;
679 if (!strcmp(var, "core.quotepath")) {
680 quote_path_fully = git_config_bool(var, value);
681 return 0;
684 if (!strcmp(var, "core.symlinks")) {
685 has_symlinks = git_config_bool(var, value);
686 return 0;
689 if (!strcmp(var, "core.ignorecase")) {
690 ignore_case = git_config_bool(var, value);
691 return 0;
694 if (!strcmp(var, "core.attributesfile"))
695 return git_config_pathname(&git_attributes_file, var, value);
697 if (!strcmp(var, "core.bare")) {
698 is_bare_repository_cfg = git_config_bool(var, value);
699 return 0;
702 if (!strcmp(var, "core.ignorestat")) {
703 assume_unchanged = git_config_bool(var, value);
704 return 0;
707 if (!strcmp(var, "core.prefersymlinkrefs")) {
708 prefer_symlink_refs = git_config_bool(var, value);
709 return 0;
712 if (!strcmp(var, "core.logallrefupdates")) {
713 log_all_ref_updates = git_config_bool(var, value);
714 return 0;
717 if (!strcmp(var, "core.warnambiguousrefs")) {
718 warn_ambiguous_refs = git_config_bool(var, value);
719 return 0;
722 if (!strcmp(var, "core.abbrev")) {
723 int abbrev = git_config_int(var, value);
724 if (abbrev < minimum_abbrev || abbrev > 40)
725 return -1;
726 default_abbrev = abbrev;
727 return 0;
730 if (!strcmp(var, "core.loosecompression")) {
731 int level = git_config_int(var, value);
732 if (level == -1)
733 level = Z_DEFAULT_COMPRESSION;
734 else if (level < 0 || level > Z_BEST_COMPRESSION)
735 die("bad zlib compression level %d", level);
736 zlib_compression_level = level;
737 zlib_compression_seen = 1;
738 return 0;
741 if (!strcmp(var, "core.compression")) {
742 int level = git_config_int(var, value);
743 if (level == -1)
744 level = Z_DEFAULT_COMPRESSION;
745 else if (level < 0 || level > Z_BEST_COMPRESSION)
746 die("bad zlib compression level %d", level);
747 core_compression_level = level;
748 core_compression_seen = 1;
749 if (!zlib_compression_seen)
750 zlib_compression_level = level;
751 return 0;
754 if (!strcmp(var, "core.packedgitwindowsize")) {
755 int pgsz_x2 = getpagesize() * 2;
756 packed_git_window_size = git_config_ulong(var, value);
758 /* This value must be multiple of (pagesize * 2) */
759 packed_git_window_size /= pgsz_x2;
760 if (packed_git_window_size < 1)
761 packed_git_window_size = 1;
762 packed_git_window_size *= pgsz_x2;
763 return 0;
766 if (!strcmp(var, "core.bigfilethreshold")) {
767 big_file_threshold = git_config_ulong(var, value);
768 return 0;
771 if (!strcmp(var, "core.packedgitlimit")) {
772 packed_git_limit = git_config_ulong(var, value);
773 return 0;
776 if (!strcmp(var, "core.deltabasecachelimit")) {
777 delta_base_cache_limit = git_config_ulong(var, value);
778 return 0;
781 if (!strcmp(var, "core.autocrlf")) {
782 if (value && !strcasecmp(value, "input")) {
783 if (core_eol == EOL_CRLF)
784 return error("core.autocrlf=input conflicts with core.eol=crlf");
785 auto_crlf = AUTO_CRLF_INPUT;
786 return 0;
788 auto_crlf = git_config_bool(var, value);
789 return 0;
792 if (!strcmp(var, "core.safecrlf")) {
793 if (value && !strcasecmp(value, "warn")) {
794 safe_crlf = SAFE_CRLF_WARN;
795 return 0;
797 safe_crlf = git_config_bool(var, value);
798 return 0;
801 if (!strcmp(var, "core.eol")) {
802 if (value && !strcasecmp(value, "lf"))
803 core_eol = EOL_LF;
804 else if (value && !strcasecmp(value, "crlf"))
805 core_eol = EOL_CRLF;
806 else if (value && !strcasecmp(value, "native"))
807 core_eol = EOL_NATIVE;
808 else
809 core_eol = EOL_UNSET;
810 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
811 return error("core.autocrlf=input conflicts with core.eol=crlf");
812 return 0;
815 if (!strcmp(var, "core.notesref")) {
816 notes_ref_name = xstrdup(value);
817 return 0;
820 if (!strcmp(var, "core.pager"))
821 return git_config_string(&pager_program, var, value);
823 if (!strcmp(var, "core.editor"))
824 return git_config_string(&editor_program, var, value);
826 if (!strcmp(var, "core.commentchar")) {
827 const char *comment;
828 int ret = git_config_string(&comment, var, value);
829 if (!ret)
830 comment_line_char = comment[0];
831 return ret;
834 if (!strcmp(var, "core.askpass"))
835 return git_config_string(&askpass_program, var, value);
837 if (!strcmp(var, "core.excludesfile"))
838 return git_config_pathname(&excludes_file, var, value);
840 if (!strcmp(var, "core.whitespace")) {
841 if (!value)
842 return config_error_nonbool(var);
843 whitespace_rule_cfg = parse_whitespace_rule(value);
844 return 0;
847 if (!strcmp(var, "core.fsyncobjectfiles")) {
848 fsync_object_files = git_config_bool(var, value);
849 return 0;
852 if (!strcmp(var, "core.preloadindex")) {
853 core_preload_index = git_config_bool(var, value);
854 return 0;
857 if (!strcmp(var, "core.createobject")) {
858 if (!strcmp(value, "rename"))
859 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
860 else if (!strcmp(value, "link"))
861 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
862 else
863 die("Invalid mode for object creation: %s", value);
864 return 0;
867 if (!strcmp(var, "core.sparsecheckout")) {
868 core_apply_sparse_checkout = git_config_bool(var, value);
869 return 0;
872 if (!strcmp(var, "core.precomposeunicode")) {
873 precomposed_unicode = git_config_bool(var, value);
874 return 0;
877 if (!strcmp(var, "core.protecthfs")) {
878 protect_hfs = git_config_bool(var, value);
879 return 0;
882 if (!strcmp(var, "core.protectntfs")) {
883 protect_ntfs = git_config_bool(var, value);
884 return 0;
887 /* Add other config variables here and to Documentation/config.txt. */
888 return 0;
891 static int git_default_i18n_config(const char *var, const char *value)
893 if (!strcmp(var, "i18n.commitencoding"))
894 return git_config_string(&git_commit_encoding, var, value);
896 if (!strcmp(var, "i18n.logoutputencoding"))
897 return git_config_string(&git_log_output_encoding, var, value);
899 /* Add other config variables here and to Documentation/config.txt. */
900 return 0;
903 static int git_default_branch_config(const char *var, const char *value)
905 if (!strcmp(var, "branch.autosetupmerge")) {
906 if (value && !strcasecmp(value, "always")) {
907 git_branch_track = BRANCH_TRACK_ALWAYS;
908 return 0;
910 git_branch_track = git_config_bool(var, value);
911 return 0;
913 if (!strcmp(var, "branch.autosetuprebase")) {
914 if (!value)
915 return config_error_nonbool(var);
916 else if (!strcmp(value, "never"))
917 autorebase = AUTOREBASE_NEVER;
918 else if (!strcmp(value, "local"))
919 autorebase = AUTOREBASE_LOCAL;
920 else if (!strcmp(value, "remote"))
921 autorebase = AUTOREBASE_REMOTE;
922 else if (!strcmp(value, "always"))
923 autorebase = AUTOREBASE_ALWAYS;
924 else
925 return error("Malformed value for %s", var);
926 return 0;
929 /* Add other config variables here and to Documentation/config.txt. */
930 return 0;
933 static int git_default_push_config(const char *var, const char *value)
935 if (!strcmp(var, "push.default")) {
936 if (!value)
937 return config_error_nonbool(var);
938 else if (!strcmp(value, "nothing"))
939 push_default = PUSH_DEFAULT_NOTHING;
940 else if (!strcmp(value, "matching"))
941 push_default = PUSH_DEFAULT_MATCHING;
942 else if (!strcmp(value, "simple"))
943 push_default = PUSH_DEFAULT_SIMPLE;
944 else if (!strcmp(value, "upstream"))
945 push_default = PUSH_DEFAULT_UPSTREAM;
946 else if (!strcmp(value, "tracking")) /* deprecated */
947 push_default = PUSH_DEFAULT_UPSTREAM;
948 else if (!strcmp(value, "current"))
949 push_default = PUSH_DEFAULT_CURRENT;
950 else {
951 error("Malformed value for %s: %s", var, value);
952 return error("Must be one of nothing, matching, simple, "
953 "upstream or current.");
955 return 0;
958 /* Add other config variables here and to Documentation/config.txt. */
959 return 0;
962 static int git_default_mailmap_config(const char *var, const char *value)
964 if (!strcmp(var, "mailmap.file"))
965 return git_config_pathname(&git_mailmap_file, var, value);
966 if (!strcmp(var, "mailmap.blob"))
967 return git_config_string(&git_mailmap_blob, var, value);
969 /* Add other config variables here and to Documentation/config.txt. */
970 return 0;
973 int git_default_config(const char *var, const char *value, void *dummy)
975 if (starts_with(var, "core."))
976 return git_default_core_config(var, value);
978 if (starts_with(var, "user."))
979 return git_ident_config(var, value, dummy);
981 if (starts_with(var, "i18n."))
982 return git_default_i18n_config(var, value);
984 if (starts_with(var, "branch."))
985 return git_default_branch_config(var, value);
987 if (starts_with(var, "push."))
988 return git_default_push_config(var, value);
990 if (starts_with(var, "mailmap."))
991 return git_default_mailmap_config(var, value);
993 if (starts_with(var, "advice."))
994 return git_default_advice_config(var, value);
996 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
997 pager_use_color = git_config_bool(var,value);
998 return 0;
1001 if (!strcmp(var, "pack.packsizelimit")) {
1002 pack_size_limit_cfg = git_config_ulong(var, value);
1003 return 0;
1005 /* Add other config variables here and to Documentation/config.txt. */
1006 return 0;
1010 * All source specific fields in the union, die_on_error, name and the callbacks
1011 * fgetc, ungetc, ftell of top need to be initialized before calling
1012 * this function.
1014 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1016 int ret;
1018 /* push config-file parsing state stack */
1019 top->prev = cf;
1020 top->linenr = 1;
1021 top->eof = 0;
1022 strbuf_init(&top->value, 1024);
1023 strbuf_init(&top->var, 1024);
1024 cf = top;
1026 ret = git_parse_source(fn, data);
1028 /* pop config-file parsing state stack */
1029 strbuf_release(&top->value);
1030 strbuf_release(&top->var);
1031 cf = top->prev;
1033 return ret;
1036 static int do_config_from_file(config_fn_t fn,
1037 const char *name, const char *path, FILE *f, void *data)
1039 struct config_source top;
1041 top.u.file = f;
1042 top.name = name;
1043 top.path = path;
1044 top.die_on_error = 1;
1045 top.do_fgetc = config_file_fgetc;
1046 top.do_ungetc = config_file_ungetc;
1047 top.do_ftell = config_file_ftell;
1049 return do_config_from(&top, fn, data);
1052 static int git_config_from_stdin(config_fn_t fn, void *data)
1054 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1057 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1059 int ret = -1;
1060 FILE *f;
1062 f = fopen(filename, "r");
1063 if (f) {
1064 ret = do_config_from_file(fn, filename, filename, f, data);
1065 fclose(f);
1067 return ret;
1070 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1071 size_t len, void *data)
1073 struct config_source top;
1075 top.u.buf.buf = buf;
1076 top.u.buf.len = len;
1077 top.u.buf.pos = 0;
1078 top.name = name;
1079 top.path = NULL;
1080 top.die_on_error = 0;
1081 top.do_fgetc = config_buf_fgetc;
1082 top.do_ungetc = config_buf_ungetc;
1083 top.do_ftell = config_buf_ftell;
1085 return do_config_from(&top, fn, data);
1088 static int git_config_from_blob_sha1(config_fn_t fn,
1089 const char *name,
1090 const unsigned char *sha1,
1091 void *data)
1093 enum object_type type;
1094 char *buf;
1095 unsigned long size;
1096 int ret;
1098 buf = read_sha1_file(sha1, &type, &size);
1099 if (!buf)
1100 return error("unable to load config blob object '%s'", name);
1101 if (type != OBJ_BLOB) {
1102 free(buf);
1103 return error("reference '%s' does not point to a blob", name);
1106 ret = git_config_from_buf(fn, name, buf, size, data);
1107 free(buf);
1109 return ret;
1112 static int git_config_from_blob_ref(config_fn_t fn,
1113 const char *name,
1114 void *data)
1116 unsigned char sha1[20];
1118 if (get_sha1(name, sha1) < 0)
1119 return error("unable to resolve config blob '%s'", name);
1120 return git_config_from_blob_sha1(fn, name, sha1, data);
1123 const char *git_etc_gitconfig(void)
1125 static const char *system_wide;
1126 if (!system_wide)
1127 system_wide = system_path(ETC_GITCONFIG);
1128 return system_wide;
1131 int git_env_bool(const char *k, int def)
1133 const char *v = getenv(k);
1134 return v ? git_config_bool(k, v) : def;
1137 int git_config_system(void)
1139 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1142 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1144 int ret = 0, found = 0;
1145 char *xdg_config = NULL;
1146 char *user_config = NULL;
1148 home_config_paths(&user_config, &xdg_config, "config");
1150 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1151 ret += git_config_from_file(fn, git_etc_gitconfig(),
1152 data);
1153 found += 1;
1156 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1157 ret += git_config_from_file(fn, xdg_config, data);
1158 found += 1;
1161 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1162 ret += git_config_from_file(fn, user_config, data);
1163 found += 1;
1166 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1167 ret += git_config_from_file(fn, repo_config, data);
1168 found += 1;
1171 switch (git_config_from_parameters(fn, data)) {
1172 case -1: /* error */
1173 die("unable to parse command-line config");
1174 break;
1175 case 0: /* found nothing */
1176 break;
1177 default: /* found at least one item */
1178 found++;
1179 break;
1182 free(xdg_config);
1183 free(user_config);
1184 return ret == 0 ? found : ret;
1187 int git_config_with_options(config_fn_t fn, void *data,
1188 struct git_config_source *config_source,
1189 int respect_includes)
1191 char *repo_config = NULL;
1192 int ret;
1193 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1195 if (respect_includes) {
1196 inc.fn = fn;
1197 inc.data = data;
1198 fn = git_config_include;
1199 data = &inc;
1203 * If we have a specific filename, use it. Otherwise, follow the
1204 * regular lookup sequence.
1206 if (config_source && config_source->use_stdin)
1207 return git_config_from_stdin(fn, data);
1208 else if (config_source && config_source->file)
1209 return git_config_from_file(fn, config_source->file, data);
1210 else if (config_source && config_source->blob)
1211 return git_config_from_blob_ref(fn, config_source->blob, data);
1213 repo_config = git_pathdup("config");
1214 ret = git_config_early(fn, data, repo_config);
1215 if (repo_config)
1216 free(repo_config);
1217 return ret;
1220 int git_config(config_fn_t fn, void *data)
1222 return git_config_with_options(fn, data, NULL, 1);
1226 * Find all the stuff for git_config_set() below.
1229 static struct {
1230 int baselen;
1231 char *key;
1232 int do_not_match;
1233 regex_t *value_regex;
1234 int multi_replace;
1235 size_t *offset;
1236 unsigned int offset_alloc;
1237 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1238 int seen;
1239 } store;
1241 static int matches(const char *key, const char *value)
1243 return !strcmp(key, store.key) &&
1244 (store.value_regex == NULL ||
1245 (store.do_not_match ^
1246 !regexec(store.value_regex, value, 0, NULL, 0)));
1249 static int store_aux(const char *key, const char *value, void *cb)
1251 const char *ep;
1252 size_t section_len;
1254 switch (store.state) {
1255 case KEY_SEEN:
1256 if (matches(key, value)) {
1257 if (store.seen == 1 && store.multi_replace == 0) {
1258 warning("%s has multiple values", key);
1261 ALLOC_GROW(store.offset, store.seen + 1,
1262 store.offset_alloc);
1264 store.offset[store.seen] = cf->do_ftell(cf);
1265 store.seen++;
1267 break;
1268 case SECTION_SEEN:
1270 * What we are looking for is in store.key (both
1271 * section and var), and its section part is baselen
1272 * long. We found key (again, both section and var).
1273 * We would want to know if this key is in the same
1274 * section as what we are looking for. We already
1275 * know we are in the same section as what should
1276 * hold store.key.
1278 ep = strrchr(key, '.');
1279 section_len = ep - key;
1281 if ((section_len != store.baselen) ||
1282 memcmp(key, store.key, section_len+1)) {
1283 store.state = SECTION_END_SEEN;
1284 break;
1288 * Do not increment matches: this is no match, but we
1289 * just made sure we are in the desired section.
1291 ALLOC_GROW(store.offset, store.seen + 1,
1292 store.offset_alloc);
1293 store.offset[store.seen] = cf->do_ftell(cf);
1294 /* fallthru */
1295 case SECTION_END_SEEN:
1296 case START:
1297 if (matches(key, value)) {
1298 ALLOC_GROW(store.offset, store.seen + 1,
1299 store.offset_alloc);
1300 store.offset[store.seen] = cf->do_ftell(cf);
1301 store.state = KEY_SEEN;
1302 store.seen++;
1303 } else {
1304 if (strrchr(key, '.') - key == store.baselen &&
1305 !strncmp(key, store.key, store.baselen)) {
1306 store.state = SECTION_SEEN;
1307 ALLOC_GROW(store.offset,
1308 store.seen + 1,
1309 store.offset_alloc);
1310 store.offset[store.seen] = cf->do_ftell(cf);
1314 return 0;
1317 static int write_error(const char *filename)
1319 error("failed to write new configuration file %s", filename);
1321 /* Same error code as "failed to rename". */
1322 return 4;
1325 static int store_write_section(int fd, const char *key)
1327 const char *dot;
1328 int i, success;
1329 struct strbuf sb = STRBUF_INIT;
1331 dot = memchr(key, '.', store.baselen);
1332 if (dot) {
1333 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1334 for (i = dot - key + 1; i < store.baselen; i++) {
1335 if (key[i] == '"' || key[i] == '\\')
1336 strbuf_addch(&sb, '\\');
1337 strbuf_addch(&sb, key[i]);
1339 strbuf_addstr(&sb, "\"]\n");
1340 } else {
1341 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1344 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1345 strbuf_release(&sb);
1347 return success;
1350 static int store_write_pair(int fd, const char *key, const char *value)
1352 int i, success;
1353 int length = strlen(key + store.baselen + 1);
1354 const char *quote = "";
1355 struct strbuf sb = STRBUF_INIT;
1358 * Check to see if the value needs to be surrounded with a dq pair.
1359 * Note that problematic characters are always backslash-quoted; this
1360 * check is about not losing leading or trailing SP and strings that
1361 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1362 * configuration parser.
1364 if (value[0] == ' ')
1365 quote = "\"";
1366 for (i = 0; value[i]; i++)
1367 if (value[i] == ';' || value[i] == '#')
1368 quote = "\"";
1369 if (i && value[i - 1] == ' ')
1370 quote = "\"";
1372 strbuf_addf(&sb, "\t%.*s = %s",
1373 length, key + store.baselen + 1, quote);
1375 for (i = 0; value[i]; i++)
1376 switch (value[i]) {
1377 case '\n':
1378 strbuf_addstr(&sb, "\\n");
1379 break;
1380 case '\t':
1381 strbuf_addstr(&sb, "\\t");
1382 break;
1383 case '"':
1384 case '\\':
1385 strbuf_addch(&sb, '\\');
1386 default:
1387 strbuf_addch(&sb, value[i]);
1388 break;
1390 strbuf_addf(&sb, "%s\n", quote);
1392 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1393 strbuf_release(&sb);
1395 return success;
1398 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1399 size_t offset_, int *found_bracket)
1401 size_t equal_offset = size, bracket_offset = size;
1402 ssize_t offset;
1404 contline:
1405 for (offset = offset_-2; offset > 0
1406 && contents[offset] != '\n'; offset--)
1407 switch (contents[offset]) {
1408 case '=': equal_offset = offset; break;
1409 case ']': bracket_offset = offset; break;
1411 if (offset > 0 && contents[offset-1] == '\\') {
1412 offset_ = offset;
1413 goto contline;
1415 if (bracket_offset < equal_offset) {
1416 *found_bracket = 1;
1417 offset = bracket_offset+1;
1418 } else
1419 offset++;
1421 return offset;
1424 int git_config_set_in_file(const char *config_filename,
1425 const char *key, const char *value)
1427 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1430 int git_config_set(const char *key, const char *value)
1432 return git_config_set_multivar(key, value, NULL, 0);
1436 * Auxiliary function to sanity-check and split the key into the section
1437 * identifier and variable name.
1439 * Returns 0 on success, -1 when there is an invalid character in the key and
1440 * -2 if there is no section name in the key.
1442 * store_key - pointer to char* which will hold a copy of the key with
1443 * lowercase section and variable name
1444 * baselen - pointer to int which will hold the length of the
1445 * section + subsection part, can be NULL
1447 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1449 int i, dot, baselen;
1450 const char *last_dot = strrchr(key, '.');
1453 * Since "key" actually contains the section name and the real
1454 * key name separated by a dot, we have to know where the dot is.
1457 if (last_dot == NULL || last_dot == key) {
1458 error("key does not contain a section: %s", key);
1459 return -CONFIG_NO_SECTION_OR_NAME;
1462 if (!last_dot[1]) {
1463 error("key does not contain variable name: %s", key);
1464 return -CONFIG_NO_SECTION_OR_NAME;
1467 baselen = last_dot - key;
1468 if (baselen_)
1469 *baselen_ = baselen;
1472 * Validate the key and while at it, lower case it for matching.
1474 *store_key = xmalloc(strlen(key) + 1);
1476 dot = 0;
1477 for (i = 0; key[i]; i++) {
1478 unsigned char c = key[i];
1479 if (c == '.')
1480 dot = 1;
1481 /* Leave the extended basename untouched.. */
1482 if (!dot || i > baselen) {
1483 if (!iskeychar(c) ||
1484 (i == baselen + 1 && !isalpha(c))) {
1485 error("invalid key: %s", key);
1486 goto out_free_ret_1;
1488 c = tolower(c);
1489 } else if (c == '\n') {
1490 error("invalid key (newline): %s", key);
1491 goto out_free_ret_1;
1493 (*store_key)[i] = c;
1495 (*store_key)[i] = 0;
1497 return 0;
1499 out_free_ret_1:
1500 free(*store_key);
1501 *store_key = NULL;
1502 return -CONFIG_INVALID_KEY;
1506 * If value==NULL, unset in (remove from) config,
1507 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1508 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1509 * else all matching key/values (regardless how many) are removed,
1510 * before the new pair is written.
1512 * Returns 0 on success.
1514 * This function does this:
1516 * - it locks the config file by creating ".git/config.lock"
1518 * - it then parses the config using store_aux() as validator to find
1519 * the position on the key/value pair to replace. If it is to be unset,
1520 * it must be found exactly once.
1522 * - the config file is mmap()ed and the part before the match (if any) is
1523 * written to the lock file, then the changed part and the rest.
1525 * - the config file is removed and the lock file rename()d to it.
1528 int git_config_set_multivar_in_file(const char *config_filename,
1529 const char *key, const char *value,
1530 const char *value_regex, int multi_replace)
1532 int fd = -1, in_fd;
1533 int ret;
1534 struct lock_file *lock = NULL;
1535 char *filename_buf = NULL;
1537 /* parse-key returns negative; flip the sign to feed exit(3) */
1538 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1539 if (ret)
1540 goto out_free;
1542 store.multi_replace = multi_replace;
1544 if (!config_filename)
1545 config_filename = filename_buf = git_pathdup("config");
1548 * The lock serves a purpose in addition to locking: the new
1549 * contents of .git/config will be written into it.
1551 lock = xcalloc(1, sizeof(struct lock_file));
1552 fd = hold_lock_file_for_update(lock, config_filename, 0);
1553 if (fd < 0) {
1554 error("could not lock config file %s: %s", config_filename, strerror(errno));
1555 free(store.key);
1556 ret = CONFIG_NO_LOCK;
1557 goto out_free;
1561 * If .git/config does not exist yet, write a minimal version.
1563 in_fd = open(config_filename, O_RDONLY);
1564 if ( in_fd < 0 ) {
1565 free(store.key);
1567 if ( ENOENT != errno ) {
1568 error("opening %s: %s", config_filename,
1569 strerror(errno));
1570 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1571 goto out_free;
1573 /* if nothing to unset, error out */
1574 if (value == NULL) {
1575 ret = CONFIG_NOTHING_SET;
1576 goto out_free;
1579 store.key = (char *)key;
1580 if (!store_write_section(fd, key) ||
1581 !store_write_pair(fd, key, value))
1582 goto write_err_out;
1583 } else {
1584 struct stat st;
1585 char *contents;
1586 size_t contents_sz, copy_begin, copy_end;
1587 int i, new_line = 0;
1589 if (value_regex == NULL)
1590 store.value_regex = NULL;
1591 else {
1592 if (value_regex[0] == '!') {
1593 store.do_not_match = 1;
1594 value_regex++;
1595 } else
1596 store.do_not_match = 0;
1598 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1599 if (regcomp(store.value_regex, value_regex,
1600 REG_EXTENDED)) {
1601 error("invalid pattern: %s", value_regex);
1602 free(store.value_regex);
1603 ret = CONFIG_INVALID_PATTERN;
1604 goto out_free;
1608 ALLOC_GROW(store.offset, 1, store.offset_alloc);
1609 store.offset[0] = 0;
1610 store.state = START;
1611 store.seen = 0;
1614 * After this, store.offset will contain the *end* offset
1615 * of the last match, or remain at 0 if no match was found.
1616 * As a side effect, we make sure to transform only a valid
1617 * existing config file.
1619 if (git_config_from_file(store_aux, config_filename, NULL)) {
1620 error("invalid config file %s", config_filename);
1621 free(store.key);
1622 if (store.value_regex != NULL) {
1623 regfree(store.value_regex);
1624 free(store.value_regex);
1626 ret = CONFIG_INVALID_FILE;
1627 goto out_free;
1630 free(store.key);
1631 if (store.value_regex != NULL) {
1632 regfree(store.value_regex);
1633 free(store.value_regex);
1636 /* if nothing to unset, or too many matches, error out */
1637 if ((store.seen == 0 && value == NULL) ||
1638 (store.seen > 1 && multi_replace == 0)) {
1639 ret = CONFIG_NOTHING_SET;
1640 goto out_free;
1643 fstat(in_fd, &st);
1644 contents_sz = xsize_t(st.st_size);
1645 contents = xmmap(NULL, contents_sz, PROT_READ,
1646 MAP_PRIVATE, in_fd, 0);
1647 close(in_fd);
1649 if (store.seen == 0)
1650 store.seen = 1;
1652 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1653 if (store.offset[i] == 0) {
1654 store.offset[i] = copy_end = contents_sz;
1655 } else if (store.state != KEY_SEEN) {
1656 copy_end = store.offset[i];
1657 } else
1658 copy_end = find_beginning_of_line(
1659 contents, contents_sz,
1660 store.offset[i]-2, &new_line);
1662 if (copy_end > 0 && contents[copy_end-1] != '\n')
1663 new_line = 1;
1665 /* write the first part of the config */
1666 if (copy_end > copy_begin) {
1667 if (write_in_full(fd, contents + copy_begin,
1668 copy_end - copy_begin) <
1669 copy_end - copy_begin)
1670 goto write_err_out;
1671 if (new_line &&
1672 write_str_in_full(fd, "\n") != 1)
1673 goto write_err_out;
1675 copy_begin = store.offset[i];
1678 /* write the pair (value == NULL means unset) */
1679 if (value != NULL) {
1680 if (store.state == START) {
1681 if (!store_write_section(fd, key))
1682 goto write_err_out;
1684 if (!store_write_pair(fd, key, value))
1685 goto write_err_out;
1688 /* write the rest of the config */
1689 if (copy_begin < contents_sz)
1690 if (write_in_full(fd, contents + copy_begin,
1691 contents_sz - copy_begin) <
1692 contents_sz - copy_begin)
1693 goto write_err_out;
1695 munmap(contents, contents_sz);
1698 if (commit_lock_file(lock) < 0) {
1699 error("could not commit config file %s", config_filename);
1700 ret = CONFIG_NO_WRITE;
1701 goto out_free;
1705 * lock is committed, so don't try to roll it back below.
1706 * NOTE: Since lockfile.c keeps a linked list of all created
1707 * lock_file structures, it isn't safe to free(lock). It's
1708 * better to just leave it hanging around.
1710 lock = NULL;
1711 ret = 0;
1713 out_free:
1714 if (lock)
1715 rollback_lock_file(lock);
1716 free(filename_buf);
1717 return ret;
1719 write_err_out:
1720 ret = write_error(lock->filename);
1721 goto out_free;
1725 int git_config_set_multivar(const char *key, const char *value,
1726 const char *value_regex, int multi_replace)
1728 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1729 multi_replace);
1732 static int section_name_match (const char *buf, const char *name)
1734 int i = 0, j = 0, dot = 0;
1735 if (buf[i] != '[')
1736 return 0;
1737 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1738 if (!dot && isspace(buf[i])) {
1739 dot = 1;
1740 if (name[j++] != '.')
1741 break;
1742 for (i++; isspace(buf[i]); i++)
1743 ; /* do nothing */
1744 if (buf[i] != '"')
1745 break;
1746 continue;
1748 if (buf[i] == '\\' && dot)
1749 i++;
1750 else if (buf[i] == '"' && dot) {
1751 for (i++; isspace(buf[i]); i++)
1752 ; /* do_nothing */
1753 break;
1755 if (buf[i] != name[j++])
1756 break;
1758 if (buf[i] == ']' && name[j] == 0) {
1760 * We match, now just find the right length offset by
1761 * gobbling up any whitespace after it, as well
1763 i++;
1764 for (; buf[i] && isspace(buf[i]); i++)
1765 ; /* do nothing */
1766 return i;
1768 return 0;
1771 static int section_name_is_ok(const char *name)
1773 /* Empty section names are bogus. */
1774 if (!*name)
1775 return 0;
1778 * Before a dot, we must be alphanumeric or dash. After the first dot,
1779 * anything goes, so we can stop checking.
1781 for (; *name && *name != '.'; name++)
1782 if (*name != '-' && !isalnum(*name))
1783 return 0;
1784 return 1;
1787 /* if new_name == NULL, the section is removed instead */
1788 int git_config_rename_section_in_file(const char *config_filename,
1789 const char *old_name, const char *new_name)
1791 int ret = 0, remove = 0;
1792 char *filename_buf = NULL;
1793 struct lock_file *lock;
1794 int out_fd;
1795 char buf[1024];
1796 FILE *config_file;
1798 if (new_name && !section_name_is_ok(new_name)) {
1799 ret = error("invalid section name: %s", new_name);
1800 goto out;
1803 if (!config_filename)
1804 config_filename = filename_buf = git_pathdup("config");
1806 lock = xcalloc(1, sizeof(struct lock_file));
1807 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1808 if (out_fd < 0) {
1809 ret = error("could not lock config file %s", config_filename);
1810 goto out;
1813 if (!(config_file = fopen(config_filename, "rb"))) {
1814 /* no config file means nothing to rename, no error */
1815 goto unlock_and_out;
1818 while (fgets(buf, sizeof(buf), config_file)) {
1819 int i;
1820 int length;
1821 char *output = buf;
1822 for (i = 0; buf[i] && isspace(buf[i]); i++)
1823 ; /* do nothing */
1824 if (buf[i] == '[') {
1825 /* it's a section */
1826 int offset = section_name_match(&buf[i], old_name);
1827 if (offset > 0) {
1828 ret++;
1829 if (new_name == NULL) {
1830 remove = 1;
1831 continue;
1833 store.baselen = strlen(new_name);
1834 if (!store_write_section(out_fd, new_name)) {
1835 ret = write_error(lock->filename);
1836 goto out;
1839 * We wrote out the new section, with
1840 * a newline, now skip the old
1841 * section's length
1843 output += offset + i;
1844 if (strlen(output) > 0) {
1846 * More content means there's
1847 * a declaration to put on the
1848 * next line; indent with a
1849 * tab
1851 output -= 1;
1852 output[0] = '\t';
1855 remove = 0;
1857 if (remove)
1858 continue;
1859 length = strlen(output);
1860 if (write_in_full(out_fd, output, length) != length) {
1861 ret = write_error(lock->filename);
1862 goto out;
1865 fclose(config_file);
1866 unlock_and_out:
1867 if (commit_lock_file(lock) < 0)
1868 ret = error("could not commit config file %s", config_filename);
1869 out:
1870 free(filename_buf);
1871 return ret;
1874 int git_config_rename_section(const char *old_name, const char *new_name)
1876 return git_config_rename_section_in_file(NULL, old_name, new_name);
1880 * Call this to report error for your variable that should not
1881 * get a boolean value (i.e. "[my] var" means "true").
1883 #undef config_error_nonbool
1884 int config_error_nonbool(const char *var)
1886 return error("Missing value for '%s'", var);
1889 int parse_config_key(const char *var,
1890 const char *section,
1891 const char **subsection, int *subsection_len,
1892 const char **key)
1894 int section_len = strlen(section);
1895 const char *dot;
1897 /* Does it start with "section." ? */
1898 if (!starts_with(var, section) || var[section_len] != '.')
1899 return -1;
1902 * Find the key; we don't know yet if we have a subsection, but we must
1903 * parse backwards from the end, since the subsection may have dots in
1904 * it, too.
1906 dot = strrchr(var, '.');
1907 *key = dot + 1;
1909 /* Did we have a subsection at all? */
1910 if (dot == var + section_len) {
1911 *subsection = NULL;
1912 *subsection_len = 0;
1914 else {
1915 *subsection = var + section_len + 1;
1916 *subsection_len = dot - *subsection;
1919 return 0;