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);
242 die("bad config value for '%s' in %s", name
, config_file_name
);
245 int git_config_bool(const char *name
, const char *value
)
251 if (!strcasecmp(value
, "true") || !strcasecmp(value
, "yes"))
253 if (!strcasecmp(value
, "false") || !strcasecmp(value
, "no"))
255 return git_config_int(name
, value
) != 0;
258 int git_default_config(const char *var
, const char *value
)
260 /* This needs a better name */
261 if (!strcmp(var
, "core.filemode")) {
262 trust_executable_bit
= git_config_bool(var
, value
);
266 if (!strcmp(var
, "core.ignorestat")) {
267 assume_unchanged
= git_config_bool(var
, value
);
271 if (!strcmp(var
, "core.prefersymlinkrefs")) {
272 prefer_symlink_refs
= git_config_bool(var
, value
);
276 if (!strcmp(var
, "core.logallrefupdates")) {
277 log_all_ref_updates
= git_config_bool(var
, value
);
281 if (!strcmp(var
, "core.warnambiguousrefs")) {
282 warn_ambiguous_refs
= git_config_bool(var
, value
);
286 if (!strcmp(var
, "core.legacyheaders")) {
287 use_legacy_headers
= git_config_bool(var
, value
);
291 if (!strcmp(var
, "core.compression")) {
292 int level
= git_config_int(var
, value
);
294 level
= Z_DEFAULT_COMPRESSION
;
295 else if (level
< 0 || level
> Z_BEST_COMPRESSION
)
296 die("bad zlib compression level %d", level
);
297 zlib_compression_level
= level
;
301 if (!strcmp(var
, "core.packedgitwindowsize")) {
302 int pgsz
= getpagesize();
303 packed_git_window_size
= git_config_int(var
, value
);
304 packed_git_window_size
/= pgsz
;
305 if (packed_git_window_size
< 2)
306 packed_git_window_size
= 2;
307 packed_git_window_size
*= pgsz
;
311 if (!strcmp(var
, "core.packedgitlimit")) {
312 packed_git_limit
= git_config_int(var
, value
);
316 if (!strcmp(var
, "user.name")) {
317 strlcpy(git_default_name
, value
, sizeof(git_default_name
));
321 if (!strcmp(var
, "user.email")) {
322 strlcpy(git_default_email
, value
, sizeof(git_default_email
));
326 if (!strcmp(var
, "i18n.commitencoding")) {
327 git_commit_encoding
= strdup(value
);
331 if (!strcmp(var
, "i18n.logoutputencoding")) {
332 git_log_output_encoding
= strdup(value
);
337 if (!strcmp(var
, "pager.color") || !strcmp(var
, "color.pager")) {
338 pager_use_color
= git_config_bool(var
,value
);
342 /* Add other config variables here and to Documentation/config.txt. */
346 int git_config_from_file(config_fn_t fn
, const char *filename
)
349 FILE *f
= fopen(filename
, "r");
354 config_file_name
= filename
;
356 ret
= git_parse_file(fn
);
358 config_file_name
= NULL
;
363 int git_config(config_fn_t fn
)
366 char *repo_config
= NULL
;
367 const char *home
= NULL
, *filename
;
369 /* $GIT_CONFIG makes git read _only_ the given config file,
370 * $GIT_CONFIG_LOCAL will make it process it in addition to the
371 * global config file, the same way it would the per-repository
372 * config file otherwise. */
373 filename
= getenv(CONFIG_ENVIRONMENT
);
375 home
= getenv("HOME");
376 filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
378 filename
= repo_config
= xstrdup(git_path("config"));
382 char *user_config
= xstrdup(mkpath("%s/.gitconfig", home
));
383 if (!access(user_config
, R_OK
))
384 ret
= git_config_from_file(fn
, user_config
);
388 ret
+= git_config_from_file(fn
, filename
);
394 * Find all the stuff for git_config_set() below.
397 #define MAX_MATCHES 512
403 regex_t
* value_regex
;
405 off_t offset
[MAX_MATCHES
];
406 enum { START
, SECTION_SEEN
, SECTION_END_SEEN
, KEY_SEEN
} state
;
410 static int matches(const char* key
, const char* value
)
412 return !strcmp(key
, store
.key
) &&
413 (store
.value_regex
== NULL
||
414 (store
.do_not_match
^
415 !regexec(store
.value_regex
, value
, 0, NULL
, 0)));
418 static int store_aux(const char* key
, const char* value
)
420 switch (store
.state
) {
422 if (matches(key
, value
)) {
423 if (store
.seen
== 1 && store
.multi_replace
== 0) {
425 "Warning: %s has multiple values\n",
427 } else if (store
.seen
>= MAX_MATCHES
) {
428 fprintf(stderr
, "Too many matches\n");
432 store
.offset
[store
.seen
] = ftell(config_file
);
437 if (strncmp(key
, store
.key
, store
.baselen
+1)) {
438 store
.state
= SECTION_END_SEEN
;
441 /* do not increment matches: this is no match */
442 store
.offset
[store
.seen
] = ftell(config_file
);
444 case SECTION_END_SEEN
:
446 if (matches(key
, value
)) {
447 store
.offset
[store
.seen
] = ftell(config_file
);
448 store
.state
= KEY_SEEN
;
451 if (strrchr(key
, '.') - key
== store
.baselen
&&
452 !strncmp(key
, store
.key
, store
.baselen
)) {
453 store
.state
= SECTION_SEEN
;
454 store
.offset
[store
.seen
] = ftell(config_file
);
461 static void store_write_section(int fd
, const char* key
)
463 const char *dot
= strchr(key
, '.');
464 int len1
= store
.baselen
, len2
= -1;
466 dot
= strchr(key
, '.');
468 int dotlen
= dot
- key
;
470 len2
= len1
- dotlen
- 1;
476 write(fd
, key
, len1
);
479 while (--len2
>= 0) {
480 unsigned char c
= *++dot
;
490 static void store_write_pair(int fd
, const char* key
, const char* value
)
495 write(fd
, key
+store
.baselen
+1,
496 strlen(key
+store
.baselen
+1));
498 for (i
= 0; value
[i
]; i
++)
500 case '\n': write(fd
, "\\n", 2); break;
501 case '\t': write(fd
, "\\t", 2); break;
502 case '"': case '\\': write(fd
, "\\", 1);
503 default: write(fd
, value
+i
, 1);
508 static int find_beginning_of_line(const char* contents
, int size
,
509 int offset_
, int* found_bracket
)
511 int equal_offset
= size
, bracket_offset
= size
;
514 for (offset
= offset_
-2; offset
> 0
515 && contents
[offset
] != '\n'; offset
--)
516 switch (contents
[offset
]) {
517 case '=': equal_offset
= offset
; break;
518 case ']': bracket_offset
= offset
; break;
520 if (bracket_offset
< equal_offset
) {
522 offset
= bracket_offset
+1;
529 int git_config_set(const char* key
, const char* value
)
531 return git_config_set_multivar(key
, value
, NULL
, 0);
535 * If value==NULL, unset in (remove from) config,
536 * if value_regex!=NULL, disregard key/value pairs where value does not match.
537 * if multi_replace==0, nothing, or only one matching key/value is replaced,
538 * else all matching key/values (regardless how many) are removed,
539 * before the new pair is written.
541 * Returns 0 on success.
543 * This function does this:
545 * - it locks the config file by creating ".git/config.lock"
547 * - it then parses the config using store_aux() as validator to find
548 * the position on the key/value pair to replace. If it is to be unset,
549 * it must be found exactly once.
551 * - the config file is mmap()ed and the part before the match (if any) is
552 * written to the lock file, then the changed part and the rest.
554 * - the config file is removed and the lock file rename()d to it.
557 int git_config_set_multivar(const char* key
, const char* value
,
558 const char* value_regex
, int multi_replace
)
563 char* config_filename
;
565 const char* last_dot
= strrchr(key
, '.');
567 config_filename
= getenv(CONFIG_ENVIRONMENT
);
568 if (!config_filename
) {
569 config_filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
570 if (!config_filename
)
571 config_filename
= git_path("config");
573 config_filename
= xstrdup(config_filename
);
574 lock_file
= xstrdup(mkpath("%s.lock", config_filename
));
577 * Since "key" actually contains the section name and the real
578 * key name separated by a dot, we have to know where the dot is.
581 if (last_dot
== NULL
) {
582 fprintf(stderr
, "key does not contain a section: %s\n", key
);
586 store
.baselen
= last_dot
- key
;
588 store
.multi_replace
= multi_replace
;
591 * Validate the key and while at it, lower case it for matching.
593 store
.key
= xmalloc(strlen(key
) + 1);
595 for (i
= 0; key
[i
]; i
++) {
596 unsigned char c
= key
[i
];
599 /* Leave the extended basename untouched.. */
600 if (!dot
|| i
> store
.baselen
) {
601 if (!iskeychar(c
) || (i
== store
.baselen
+1 && !isalpha(c
))) {
602 fprintf(stderr
, "invalid key: %s\n", key
);
614 * The lock_file serves a purpose in addition to locking: the new
615 * contents of .git/config will be written into it.
617 fd
= open(lock_file
, O_WRONLY
| O_CREAT
| O_EXCL
, 0666);
618 if (fd
< 0 || adjust_shared_perm(lock_file
)) {
619 fprintf(stderr
, "could not lock config file\n");
626 * If .git/config does not exist yet, write a minimal version.
628 in_fd
= open(config_filename
, O_RDONLY
);
632 if ( ENOENT
!= errno
) {
633 error("opening %s: %s", config_filename
,
635 ret
= 3; /* same as "invalid config file" */
638 /* if nothing to unset, error out */
644 store
.key
= (char*)key
;
645 store_write_section(fd
, key
);
646 store_write_pair(fd
, key
, value
);
650 int i
, copy_begin
, copy_end
, new_line
= 0;
652 if (value_regex
== NULL
)
653 store
.value_regex
= NULL
;
655 if (value_regex
[0] == '!') {
656 store
.do_not_match
= 1;
659 store
.do_not_match
= 0;
661 store
.value_regex
= (regex_t
*)xmalloc(sizeof(regex_t
));
662 if (regcomp(store
.value_regex
, value_regex
,
664 fprintf(stderr
, "Invalid pattern: %s\n",
666 free(store
.value_regex
);
677 * After this, store.offset will contain the *end* offset
678 * of the last match, or remain at 0 if no match was found.
679 * As a side effect, we make sure to transform only a valid
680 * existing config file.
682 if (git_config_from_file(store_aux
, config_filename
)) {
683 fprintf(stderr
, "invalid config file\n");
685 if (store
.value_regex
!= NULL
) {
686 regfree(store
.value_regex
);
687 free(store
.value_regex
);
694 if (store
.value_regex
!= NULL
) {
695 regfree(store
.value_regex
);
696 free(store
.value_regex
);
699 /* if nothing to unset, or too many matches, error out */
700 if ((store
.seen
== 0 && value
== NULL
) ||
701 (store
.seen
> 1 && multi_replace
== 0)) {
707 contents
= mmap(NULL
, st
.st_size
, PROT_READ
,
708 MAP_PRIVATE
, in_fd
, 0);
714 for (i
= 0, copy_begin
= 0; i
< store
.seen
; i
++) {
715 if (store
.offset
[i
] == 0) {
716 store
.offset
[i
] = copy_end
= st
.st_size
;
717 } else if (store
.state
!= KEY_SEEN
) {
718 copy_end
= store
.offset
[i
];
720 copy_end
= find_beginning_of_line(
721 contents
, st
.st_size
,
722 store
.offset
[i
]-2, &new_line
);
724 /* write the first part of the config */
725 if (copy_end
> copy_begin
) {
726 write(fd
, contents
+ copy_begin
,
727 copy_end
- copy_begin
);
731 copy_begin
= store
.offset
[i
];
734 /* write the pair (value == NULL means unset) */
736 if (store
.state
== START
)
737 store_write_section(fd
, key
);
738 store_write_pair(fd
, key
, value
);
741 /* write the rest of the config */
742 if (copy_begin
< st
.st_size
)
743 write(fd
, contents
+ copy_begin
,
744 st
.st_size
- copy_begin
);
746 munmap(contents
, st
.st_size
);
747 unlink(config_filename
);
750 if (rename(lock_file
, config_filename
) < 0) {
751 fprintf(stderr
, "Could not rename the lock file?\n");
761 free(config_filename
);
769 int git_config_rename_section(const char *old_name
, const char *new_name
)
772 char *config_filename
;
773 struct lock_file
*lock
= xcalloc(sizeof(struct lock_file
), 1);
777 config_filename
= getenv(CONFIG_ENVIRONMENT
);
778 if (!config_filename
) {
779 config_filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
780 if (!config_filename
)
781 config_filename
= git_path("config");
783 config_filename
= xstrdup(config_filename
);
784 out_fd
= hold_lock_file_for_update(lock
, config_filename
, 0);
786 ret
= error("Could not lock config file!");
790 if (!(config_file
= fopen(config_filename
, "rb"))) {
791 ret
= error("Could not open config file!");
795 while (fgets(buf
, sizeof(buf
), config_file
)) {
797 for (i
= 0; buf
[i
] && isspace(buf
[i
]); i
++)
802 for (i
++; buf
[i
] && buf
[i
] != ']'; i
++) {
803 if (!dot
&& isspace(buf
[i
])) {
805 if (old_name
[j
++] != '.')
807 for (i
++; isspace(buf
[i
]); i
++)
813 if (buf
[i
] == '\\' && dot
)
815 else if (buf
[i
] == '"' && dot
) {
816 for (i
++; isspace(buf
[i
]); i
++)
820 if (buf
[i
] != old_name
[j
++])
824 /* old_name matches */
826 store
.baselen
= strlen(new_name
);
827 store_write_section(out_fd
, new_name
);
831 write(out_fd
, buf
, strlen(buf
));
834 if (close(out_fd
) || commit_lock_file(lock
) < 0)
835 ret
= error("Cannot commit config file!");
837 free(config_filename
);