2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
12 static FILE *config_file
;
13 static const char *config_file_name
;
14 static int config_linenr
;
15 static int get_next_char(void)
21 if ((f
= config_file
) != NULL
) {
24 /* DOS like systems */
41 static char *parse_value(void)
43 static char value
[1024];
44 int quote
= 0, comment
= 0, len
= 0, space
= 0;
47 int c
= get_next_char();
48 if (len
>= sizeof(value
))
58 if (isspace(c
) && !quote
) {
63 if (c
== ';' || c
== '#') {
87 /* Some characters escape as themselves */
90 /* Reject unknown escape sequences */
105 static inline int iskeychar(int c
)
107 return isalnum(c
) || c
== '-';
110 static int get_value(config_fn_t fn
, char *name
, unsigned int len
)
115 /* Get the full name */
122 name
[len
++] = tolower(c
);
127 while (c
== ' ' || c
== '\t')
134 value
= parse_value();
138 return fn(name
, value
);
141 static int get_extended_base_var(char *name
, int baselen
, int c
)
147 } while (isspace(c
));
149 /* We require the format to be '[base "extension"]' */
152 name
[baselen
++] = '.';
155 int c
= get_next_char();
166 if (baselen
> MAXNAME
/ 2)
171 if (get_next_char() != ']')
176 static int get_base_var(char *name
)
181 int c
= get_next_char();
187 return get_extended_base_var(name
, baselen
, c
);
188 if (!iskeychar(c
) && c
!= '.')
190 if (baselen
> MAXNAME
/ 2)
192 name
[baselen
++] = tolower(c
);
196 static int git_parse_file(config_fn_t fn
)
200 static char var
[MAXNAME
];
203 int c
= get_next_char();
211 if (comment
|| isspace(c
))
213 if (c
== '#' || c
== ';') {
218 baselen
= get_base_var(var
);
221 var
[baselen
++] = '.';
227 var
[baselen
] = tolower(c
);
228 if (get_value(fn
, var
, baselen
+1) < 0)
231 die("bad config file line %d in %s", config_linenr
, config_file_name
);
234 int git_config_int(const char *name
, const char *value
)
236 if (value
&& *value
) {
238 int val
= strtol(value
, &end
, 0);
241 if (!strcasecmp(end
, "k"))
243 if (!strcasecmp(end
, "m"))
244 return val
* 1024 * 1024;
245 if (!strcasecmp(end
, "g"))
246 return val
* 1024 * 1024 * 1024;
248 die("bad config value for '%s' in %s", name
, config_file_name
);
251 int git_config_bool(const char *name
, const char *value
)
257 if (!strcasecmp(value
, "true") || !strcasecmp(value
, "yes"))
259 if (!strcasecmp(value
, "false") || !strcasecmp(value
, "no"))
261 return git_config_int(name
, value
) != 0;
264 int git_default_config(const char *var
, const char *value
)
266 /* This needs a better name */
267 if (!strcmp(var
, "core.filemode")) {
268 trust_executable_bit
= git_config_bool(var
, value
);
272 if (!strcmp(var
, "core.symlinks")) {
273 has_symlinks
= git_config_bool(var
, value
);
277 if (!strcmp(var
, "core.bare")) {
278 is_bare_repository_cfg
= git_config_bool(var
, value
);
282 if (!strcmp(var
, "core.ignorestat")) {
283 assume_unchanged
= git_config_bool(var
, value
);
287 if (!strcmp(var
, "core.prefersymlinkrefs")) {
288 prefer_symlink_refs
= git_config_bool(var
, value
);
292 if (!strcmp(var
, "core.logallrefupdates")) {
293 log_all_ref_updates
= git_config_bool(var
, value
);
297 if (!strcmp(var
, "core.warnambiguousrefs")) {
298 warn_ambiguous_refs
= git_config_bool(var
, value
);
302 if (!strcmp(var
, "core.compression")) {
303 int level
= git_config_int(var
, value
);
305 level
= Z_DEFAULT_COMPRESSION
;
306 else if (level
< 0 || level
> Z_BEST_COMPRESSION
)
307 die("bad zlib compression level %d", level
);
308 zlib_compression_level
= level
;
312 if (!strcmp(var
, "core.packedgitwindowsize")) {
313 int pgsz_x2
= getpagesize() * 2;
314 packed_git_window_size
= git_config_int(var
, value
);
316 /* This value must be multiple of (pagesize * 2) */
317 packed_git_window_size
/= pgsz_x2
;
318 if (packed_git_window_size
< 1)
319 packed_git_window_size
= 1;
320 packed_git_window_size
*= pgsz_x2
;
324 if (!strcmp(var
, "core.packedgitlimit")) {
325 packed_git_limit
= git_config_int(var
, value
);
329 if (!strcmp(var
, "core.deltabasecachelimit")) {
330 delta_base_cache_limit
= git_config_int(var
, value
);
334 if (!strcmp(var
, "core.autocrlf")) {
335 if (value
&& !strcasecmp(value
, "input")) {
339 auto_crlf
= git_config_bool(var
, value
);
343 if (!strcmp(var
, "user.name")) {
344 strlcpy(git_default_name
, value
, sizeof(git_default_name
));
348 if (!strcmp(var
, "user.email")) {
349 strlcpy(git_default_email
, value
, sizeof(git_default_email
));
353 if (!strcmp(var
, "i18n.commitencoding")) {
354 git_commit_encoding
= xstrdup(value
);
358 if (!strcmp(var
, "i18n.logoutputencoding")) {
359 git_log_output_encoding
= xstrdup(value
);
364 if (!strcmp(var
, "pager.color") || !strcmp(var
, "color.pager")) {
365 pager_use_color
= git_config_bool(var
,value
);
369 /* Add other config variables here and to Documentation/config.txt. */
373 int git_config_from_file(config_fn_t fn
, const char *filename
)
376 FILE *f
= fopen(filename
, "r");
381 config_file_name
= filename
;
383 ret
= git_parse_file(fn
);
385 config_file_name
= NULL
;
390 int git_config(config_fn_t fn
)
393 char *repo_config
= NULL
;
394 const char *home
= NULL
, *filename
;
396 /* $GIT_CONFIG makes git read _only_ the given config file,
397 * $GIT_CONFIG_LOCAL will make it process it in addition to the
398 * global config file, the same way it would the per-repository
399 * config file otherwise. */
400 filename
= getenv(CONFIG_ENVIRONMENT
);
402 if (!access(ETC_GITCONFIG
, R_OK
))
403 ret
+= git_config_from_file(fn
, ETC_GITCONFIG
);
404 home
= getenv("HOME");
405 filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
407 filename
= repo_config
= xstrdup(git_path("config"));
411 char *user_config
= xstrdup(mkpath("%s/.gitconfig", home
));
412 if (!access(user_config
, R_OK
))
413 ret
= git_config_from_file(fn
, user_config
);
417 ret
+= git_config_from_file(fn
, filename
);
423 * Find all the stuff for git_config_set() below.
426 #define MAX_MATCHES 512
432 regex_t
* value_regex
;
434 size_t offset
[MAX_MATCHES
];
435 enum { START
, SECTION_SEEN
, SECTION_END_SEEN
, KEY_SEEN
} state
;
439 static int matches(const char* key
, const char* value
)
441 return !strcmp(key
, store
.key
) &&
442 (store
.value_regex
== NULL
||
443 (store
.do_not_match
^
444 !regexec(store
.value_regex
, value
, 0, NULL
, 0)));
447 static int store_aux(const char* key
, const char* value
)
452 switch (store
.state
) {
454 if (matches(key
, value
)) {
455 if (store
.seen
== 1 && store
.multi_replace
== 0) {
457 "Warning: %s has multiple values\n",
459 } else if (store
.seen
>= MAX_MATCHES
) {
460 fprintf(stderr
, "Too many matches\n");
464 store
.offset
[store
.seen
] = ftell(config_file
);
470 * What we are looking for is in store.key (both
471 * section and var), and its section part is baselen
472 * long. We found key (again, both section and var).
473 * We would want to know if this key is in the same
474 * section as what we are looking for. We already
475 * know we are in the same section as what should
478 ep
= strrchr(key
, '.');
479 section_len
= ep
- key
;
481 if ((section_len
!= store
.baselen
) ||
482 memcmp(key
, store
.key
, section_len
+1)) {
483 store
.state
= SECTION_END_SEEN
;
488 * Do not increment matches: this is no match, but we
489 * just made sure we are in the desired section.
491 store
.offset
[store
.seen
] = ftell(config_file
);
493 case SECTION_END_SEEN
:
495 if (matches(key
, value
)) {
496 store
.offset
[store
.seen
] = ftell(config_file
);
497 store
.state
= KEY_SEEN
;
500 if (strrchr(key
, '.') - key
== store
.baselen
&&
501 !strncmp(key
, store
.key
, store
.baselen
)) {
502 store
.state
= SECTION_SEEN
;
503 store
.offset
[store
.seen
] = ftell(config_file
);
510 static int write_error()
512 fprintf(stderr
, "Failed to write new configuration file\n");
514 /* Same error code as "failed to rename". */
518 static int store_write_section(int fd
, const char* key
)
520 const char *dot
= strchr(key
, '.');
521 int len1
= store
.baselen
, len2
= -1;
523 dot
= strchr(key
, '.');
525 int dotlen
= dot
- key
;
527 len2
= len1
- dotlen
- 1;
532 if (write_in_full(fd
, "[", 1) != 1 ||
533 write_in_full(fd
, key
, len1
) != len1
)
536 if (write_in_full(fd
, " \"", 2) != 2)
538 while (--len2
>= 0) {
539 unsigned char c
= *++dot
;
541 if (write_in_full(fd
, "\\", 1) != 1)
543 if (write_in_full(fd
, &c
, 1) != 1)
546 if (write_in_full(fd
, "\"", 1) != 1)
549 if (write_in_full(fd
, "]\n", 2) != 2)
555 static int store_write_pair(int fd
, const char* key
, const char* value
)
558 int length
= strlen(key
+store
.baselen
+1);
561 /* Check to see if the value needs to be quoted. */
564 for (i
= 0; value
[i
]; i
++)
565 if (value
[i
] == ';' || value
[i
] == '#')
567 if (value
[i
-1] == ' ')
570 if (write_in_full(fd
, "\t", 1) != 1 ||
571 write_in_full(fd
, key
+store
.baselen
+1, length
) != length
||
572 write_in_full(fd
, " = ", 3) != 3)
574 if (quote
&& write_in_full(fd
, "\"", 1) != 1)
576 for (i
= 0; value
[i
]; i
++)
579 if (write_in_full(fd
, "\\n", 2) != 2)
583 if (write_in_full(fd
, "\\t", 2) != 2)
588 if (write_in_full(fd
, "\\", 1) != 1)
591 if (write_in_full(fd
, value
+i
, 1) != 1)
595 if (quote
&& write_in_full(fd
, "\"", 1) != 1)
597 if (write_in_full(fd
, "\n", 1) != 1)
602 static ssize_t
find_beginning_of_line(const char* contents
, size_t size
,
603 size_t offset_
, int* found_bracket
)
605 size_t equal_offset
= size
, bracket_offset
= size
;
608 for (offset
= offset_
-2; offset
> 0
609 && contents
[offset
] != '\n'; offset
--)
610 switch (contents
[offset
]) {
611 case '=': equal_offset
= offset
; break;
612 case ']': bracket_offset
= offset
; break;
614 if (bracket_offset
< equal_offset
) {
616 offset
= bracket_offset
+1;
623 int git_config_set(const char* key
, const char* value
)
625 return git_config_set_multivar(key
, value
, NULL
, 0);
629 * If value==NULL, unset in (remove from) config,
630 * if value_regex!=NULL, disregard key/value pairs where value does not match.
631 * if multi_replace==0, nothing, or only one matching key/value is replaced,
632 * else all matching key/values (regardless how many) are removed,
633 * before the new pair is written.
635 * Returns 0 on success.
637 * This function does this:
639 * - it locks the config file by creating ".git/config.lock"
641 * - it then parses the config using store_aux() as validator to find
642 * the position on the key/value pair to replace. If it is to be unset,
643 * it must be found exactly once.
645 * - the config file is mmap()ed and the part before the match (if any) is
646 * written to the lock file, then the changed part and the rest.
648 * - the config file is removed and the lock file rename()d to it.
651 int git_config_set_multivar(const char* key
, const char* value
,
652 const char* value_regex
, int multi_replace
)
657 char* config_filename
;
659 const char* last_dot
= strrchr(key
, '.');
661 config_filename
= getenv(CONFIG_ENVIRONMENT
);
662 if (!config_filename
) {
663 config_filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
664 if (!config_filename
)
665 config_filename
= git_path("config");
667 config_filename
= xstrdup(config_filename
);
668 lock_file
= xstrdup(mkpath("%s.lock", config_filename
));
671 * Since "key" actually contains the section name and the real
672 * key name separated by a dot, we have to know where the dot is.
675 if (last_dot
== NULL
) {
676 fprintf(stderr
, "key does not contain a section: %s\n", key
);
680 store
.baselen
= last_dot
- key
;
682 store
.multi_replace
= multi_replace
;
685 * Validate the key and while at it, lower case it for matching.
687 store
.key
= xmalloc(strlen(key
) + 1);
689 for (i
= 0; key
[i
]; i
++) {
690 unsigned char c
= key
[i
];
693 /* Leave the extended basename untouched.. */
694 if (!dot
|| i
> store
.baselen
) {
695 if (!iskeychar(c
) || (i
== store
.baselen
+1 && !isalpha(c
))) {
696 fprintf(stderr
, "invalid key: %s\n", key
);
702 } else if (c
== '\n') {
703 fprintf(stderr
, "invalid key (newline): %s\n", key
);
713 * The lock_file serves a purpose in addition to locking: the new
714 * contents of .git/config will be written into it.
716 fd
= open(lock_file
, O_WRONLY
| O_CREAT
| O_EXCL
, 0666);
717 if (fd
< 0 || adjust_shared_perm(lock_file
)) {
718 fprintf(stderr
, "could not lock config file\n");
725 * If .git/config does not exist yet, write a minimal version.
727 in_fd
= open(config_filename
, O_RDONLY
);
731 if ( ENOENT
!= errno
) {
732 error("opening %s: %s", config_filename
,
734 ret
= 3; /* same as "invalid config file" */
737 /* if nothing to unset, error out */
743 store
.key
= (char*)key
;
744 if (!store_write_section(fd
, key
) ||
745 !store_write_pair(fd
, key
, value
))
750 size_t contents_sz
, copy_begin
, copy_end
;
753 if (value_regex
== NULL
)
754 store
.value_regex
= NULL
;
756 if (value_regex
[0] == '!') {
757 store
.do_not_match
= 1;
760 store
.do_not_match
= 0;
762 store
.value_regex
= (regex_t
*)xmalloc(sizeof(regex_t
));
763 if (regcomp(store
.value_regex
, value_regex
,
765 fprintf(stderr
, "Invalid pattern: %s\n",
767 free(store
.value_regex
);
778 * After this, store.offset will contain the *end* offset
779 * of the last match, or remain at 0 if no match was found.
780 * As a side effect, we make sure to transform only a valid
781 * existing config file.
783 if (git_config_from_file(store_aux
, config_filename
)) {
784 fprintf(stderr
, "invalid config file\n");
786 if (store
.value_regex
!= NULL
) {
787 regfree(store
.value_regex
);
788 free(store
.value_regex
);
795 if (store
.value_regex
!= NULL
) {
796 regfree(store
.value_regex
);
797 free(store
.value_regex
);
800 /* if nothing to unset, or too many matches, error out */
801 if ((store
.seen
== 0 && value
== NULL
) ||
802 (store
.seen
> 1 && multi_replace
== 0)) {
808 contents_sz
= xsize_t(st
.st_size
);
809 contents
= xmmap(NULL
, contents_sz
, PROT_READ
,
810 MAP_PRIVATE
, in_fd
, 0);
816 for (i
= 0, copy_begin
= 0; i
< store
.seen
; i
++) {
817 if (store
.offset
[i
] == 0) {
818 store
.offset
[i
] = copy_end
= contents_sz
;
819 } else if (store
.state
!= KEY_SEEN
) {
820 copy_end
= store
.offset
[i
];
822 copy_end
= find_beginning_of_line(
823 contents
, contents_sz
,
824 store
.offset
[i
]-2, &new_line
);
826 /* write the first part of the config */
827 if (copy_end
> copy_begin
) {
828 if (write_in_full(fd
, contents
+ copy_begin
,
829 copy_end
- copy_begin
) <
830 copy_end
- copy_begin
)
833 write_in_full(fd
, "\n", 1) != 1)
836 copy_begin
= store
.offset
[i
];
839 /* write the pair (value == NULL means unset) */
841 if (store
.state
== START
) {
842 if (!store_write_section(fd
, key
))
845 if (!store_write_pair(fd
, key
, value
))
849 /* write the rest of the config */
850 if (copy_begin
< contents_sz
)
851 if (write_in_full(fd
, contents
+ copy_begin
,
852 contents_sz
- copy_begin
) <
853 contents_sz
- copy_begin
)
856 munmap(contents
, contents_sz
);
857 unlink(config_filename
);
860 if (rename(lock_file
, config_filename
) < 0) {
861 fprintf(stderr
, "Could not rename the lock file?\n");
871 free(config_filename
);
884 static int section_name_match (const char *buf
, const char *name
)
886 int i
= 0, j
= 0, dot
= 0;
887 for (; buf
[i
] && buf
[i
] != ']'; i
++) {
888 if (!dot
&& isspace(buf
[i
])) {
890 if (name
[j
++] != '.')
892 for (i
++; isspace(buf
[i
]); i
++)
898 if (buf
[i
] == '\\' && dot
)
900 else if (buf
[i
] == '"' && dot
) {
901 for (i
++; isspace(buf
[i
]); i
++)
905 if (buf
[i
] != name
[j
++])
908 return (buf
[i
] == ']' && name
[j
] == 0);
911 /* if new_name == NULL, the section is removed instead */
912 int git_config_rename_section(const char *old_name
, const char *new_name
)
914 int ret
= 0, remove
= 0;
915 char *config_filename
;
916 struct lock_file
*lock
= xcalloc(sizeof(struct lock_file
), 1);
920 config_filename
= getenv(CONFIG_ENVIRONMENT
);
921 if (!config_filename
) {
922 config_filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
923 if (!config_filename
)
924 config_filename
= git_path("config");
926 config_filename
= xstrdup(config_filename
);
927 out_fd
= hold_lock_file_for_update(lock
, config_filename
, 0);
929 ret
= error("Could not lock config file!");
933 if (!(config_file
= fopen(config_filename
, "rb"))) {
934 /* no config file means nothing to rename, no error */
938 while (fgets(buf
, sizeof(buf
), config_file
)) {
941 for (i
= 0; buf
[i
] && isspace(buf
[i
]); i
++)
945 if (section_name_match (&buf
[i
+1], old_name
)) {
947 if (new_name
== NULL
) {
951 store
.baselen
= strlen(new_name
);
952 if (!store_write_section(out_fd
, new_name
)) {
962 length
= strlen(buf
);
963 if (write_in_full(out_fd
, buf
, length
) != length
) {
970 if (close(out_fd
) || commit_lock_file(lock
) < 0)
971 ret
= error("Cannot commit config file!");
973 free(config_filename
);