2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
13 static FILE *config_file
;
14 static const char *config_file_name
;
15 static int config_linenr
;
16 static int zlib_compression_seen
;
18 static int get_next_char(void)
24 if ((f
= config_file
) != NULL
) {
27 /* DOS like systems */
44 static char *parse_value(void)
46 static char value
[1024];
47 int quote
= 0, comment
= 0, len
= 0, space
= 0;
50 int c
= get_next_char();
51 if (len
>= sizeof(value
))
61 if (isspace(c
) && !quote
) {
66 if (c
== ';' || c
== '#') {
90 /* Some characters escape as themselves */
93 /* Reject unknown escape sequences */
108 static inline int iskeychar(int c
)
110 return isalnum(c
) || c
== '-';
113 static int get_value(config_fn_t fn
, char *name
, unsigned int len
)
118 /* Get the full name */
125 name
[len
++] = tolower(c
);
130 while (c
== ' ' || c
== '\t')
137 value
= parse_value();
141 return fn(name
, value
);
144 static int get_extended_base_var(char *name
, int baselen
, int c
)
150 } while (isspace(c
));
152 /* We require the format to be '[base "extension"]' */
155 name
[baselen
++] = '.';
158 int c
= get_next_char();
169 if (baselen
> MAXNAME
/ 2)
174 if (get_next_char() != ']')
179 static int get_base_var(char *name
)
184 int c
= get_next_char();
190 return get_extended_base_var(name
, baselen
, c
);
191 if (!iskeychar(c
) && c
!= '.')
193 if (baselen
> MAXNAME
/ 2)
195 name
[baselen
++] = tolower(c
);
199 static int git_parse_file(config_fn_t fn
)
203 static char var
[MAXNAME
];
206 int c
= get_next_char();
214 if (comment
|| isspace(c
))
216 if (c
== '#' || c
== ';') {
221 baselen
= get_base_var(var
);
224 var
[baselen
++] = '.';
230 var
[baselen
] = tolower(c
);
231 if (get_value(fn
, var
, baselen
+1) < 0)
234 die("bad config file line %d in %s", config_linenr
, config_file_name
);
237 static unsigned long get_unit_factor(const char *end
)
241 else if (!strcasecmp(end
, "k"))
243 else if (!strcasecmp(end
, "m"))
245 else if (!strcasecmp(end
, "g"))
246 return 1024 * 1024 * 1024;
247 die("unknown unit: '%s'", end
);
250 int git_parse_long(const char *value
, long *ret
)
252 if (value
&& *value
) {
254 long val
= strtol(value
, &end
, 0);
255 *ret
= val
* get_unit_factor(end
);
261 int git_parse_ulong(const char *value
, unsigned long *ret
)
263 if (value
&& *value
) {
265 unsigned long val
= strtoul(value
, &end
, 0);
266 *ret
= val
* get_unit_factor(end
);
272 int git_config_int(const char *name
, const char *value
)
275 if (!git_parse_long(value
, &ret
))
276 die("bad config value for '%s' in %s", name
, config_file_name
);
280 unsigned long git_config_ulong(const char *name
, const char *value
)
283 if (!git_parse_ulong(value
, &ret
))
284 die("bad config value for '%s' in %s", name
, config_file_name
);
288 int git_config_bool(const char *name
, const char *value
)
294 if (!strcasecmp(value
, "true") || !strcasecmp(value
, "yes"))
296 if (!strcasecmp(value
, "false") || !strcasecmp(value
, "no"))
298 return git_config_int(name
, value
) != 0;
301 int git_default_config(const char *var
, const char *value
)
303 /* This needs a better name */
304 if (!strcmp(var
, "core.filemode")) {
305 trust_executable_bit
= git_config_bool(var
, value
);
309 if (!strcmp(var
, "core.quotepath")) {
310 quote_path_fully
= git_config_bool(var
, value
);
314 if (!strcmp(var
, "core.symlinks")) {
315 has_symlinks
= git_config_bool(var
, value
);
319 if (!strcmp(var
, "core.bare")) {
320 is_bare_repository_cfg
= git_config_bool(var
, value
);
324 if (!strcmp(var
, "core.ignorestat")) {
325 assume_unchanged
= git_config_bool(var
, value
);
329 if (!strcmp(var
, "core.prefersymlinkrefs")) {
330 prefer_symlink_refs
= git_config_bool(var
, value
);
334 if (!strcmp(var
, "core.logallrefupdates")) {
335 log_all_ref_updates
= git_config_bool(var
, value
);
339 if (!strcmp(var
, "core.warnambiguousrefs")) {
340 warn_ambiguous_refs
= git_config_bool(var
, value
);
344 if (!strcmp(var
, "core.loosecompression")) {
345 int level
= git_config_int(var
, value
);
347 level
= Z_DEFAULT_COMPRESSION
;
348 else if (level
< 0 || level
> Z_BEST_COMPRESSION
)
349 die("bad zlib compression level %d", level
);
350 zlib_compression_level
= level
;
351 zlib_compression_seen
= 1;
355 if (!strcmp(var
, "core.compression")) {
356 int level
= git_config_int(var
, value
);
358 level
= Z_DEFAULT_COMPRESSION
;
359 else if (level
< 0 || level
> Z_BEST_COMPRESSION
)
360 die("bad zlib compression level %d", level
);
361 core_compression_level
= level
;
362 core_compression_seen
= 1;
363 if (!zlib_compression_seen
)
364 zlib_compression_level
= level
;
368 if (!strcmp(var
, "core.packedgitwindowsize")) {
369 int pgsz_x2
= getpagesize() * 2;
370 packed_git_window_size
= git_config_int(var
, value
);
372 /* This value must be multiple of (pagesize * 2) */
373 packed_git_window_size
/= pgsz_x2
;
374 if (packed_git_window_size
< 1)
375 packed_git_window_size
= 1;
376 packed_git_window_size
*= pgsz_x2
;
380 if (!strcmp(var
, "core.packedgitlimit")) {
381 packed_git_limit
= git_config_int(var
, value
);
385 if (!strcmp(var
, "core.deltabasecachelimit")) {
386 delta_base_cache_limit
= git_config_int(var
, value
);
390 if (!strcmp(var
, "core.autocrlf")) {
391 if (value
&& !strcasecmp(value
, "input")) {
395 auto_crlf
= git_config_bool(var
, value
);
399 if (!strcmp(var
, "user.name")) {
400 strlcpy(git_default_name
, value
, sizeof(git_default_name
));
404 if (!strcmp(var
, "user.email")) {
405 strlcpy(git_default_email
, value
, sizeof(git_default_email
));
409 if (!strcmp(var
, "i18n.commitencoding")) {
410 git_commit_encoding
= xstrdup(value
);
414 if (!strcmp(var
, "i18n.logoutputencoding")) {
415 git_log_output_encoding
= xstrdup(value
);
420 if (!strcmp(var
, "pager.color") || !strcmp(var
, "color.pager")) {
421 pager_use_color
= git_config_bool(var
,value
);
425 if (!strcmp(var
, "core.pager")) {
426 pager_program
= xstrdup(value
);
430 if (!strcmp(var
, "core.editor")) {
431 editor_program
= xstrdup(value
);
435 if (!strcmp(var
, "core.excludesfile")) {
437 die("core.excludesfile without value");
438 excludes_file
= xstrdup(value
);
442 /* Add other config variables here and to Documentation/config.txt. */
446 int git_config_from_file(config_fn_t fn
, const char *filename
)
449 FILE *f
= fopen(filename
, "r");
454 config_file_name
= filename
;
456 ret
= git_parse_file(fn
);
458 config_file_name
= NULL
;
463 const char *git_etc_gitconfig(void)
465 static const char *system_wide
;
467 system_wide
= ETC_GITCONFIG
;
468 if (!is_absolute_path(system_wide
)) {
469 /* interpret path relative to exec-dir */
470 const char *exec_path
= git_exec_path();
471 system_wide
= prefix_path(exec_path
, strlen(exec_path
),
478 int git_config(config_fn_t fn
)
481 char *repo_config
= NULL
;
482 const char *home
= NULL
, *filename
;
484 /* $GIT_CONFIG makes git read _only_ the given config file,
485 * $GIT_CONFIG_LOCAL will make it process it in addition to the
486 * global config file, the same way it would the per-repository
487 * config file otherwise. */
488 filename
= getenv(CONFIG_ENVIRONMENT
);
490 if (!access(git_etc_gitconfig(), R_OK
))
491 ret
+= git_config_from_file(fn
, git_etc_gitconfig());
492 home
= getenv("HOME");
493 filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
495 filename
= repo_config
= xstrdup(git_path("config"));
499 char *user_config
= xstrdup(mkpath("%s/.gitconfig", home
));
500 if (!access(user_config
, R_OK
))
501 ret
= git_config_from_file(fn
, user_config
);
505 ret
+= git_config_from_file(fn
, filename
);
511 * Find all the stuff for git_config_set() below.
514 #define MAX_MATCHES 512
520 regex_t
* value_regex
;
522 size_t offset
[MAX_MATCHES
];
523 enum { START
, SECTION_SEEN
, SECTION_END_SEEN
, KEY_SEEN
} state
;
527 static int matches(const char* key
, const char* value
)
529 return !strcmp(key
, store
.key
) &&
530 (store
.value_regex
== NULL
||
531 (store
.do_not_match
^
532 !regexec(store
.value_regex
, value
, 0, NULL
, 0)));
535 static int store_aux(const char* key
, const char* value
)
540 switch (store
.state
) {
542 if (matches(key
, value
)) {
543 if (store
.seen
== 1 && store
.multi_replace
== 0) {
545 "Warning: %s has multiple values\n",
547 } else if (store
.seen
>= MAX_MATCHES
) {
548 fprintf(stderr
, "Too many matches\n");
552 store
.offset
[store
.seen
] = ftell(config_file
);
558 * What we are looking for is in store.key (both
559 * section and var), and its section part is baselen
560 * long. We found key (again, both section and var).
561 * We would want to know if this key is in the same
562 * section as what we are looking for. We already
563 * know we are in the same section as what should
566 ep
= strrchr(key
, '.');
567 section_len
= ep
- key
;
569 if ((section_len
!= store
.baselen
) ||
570 memcmp(key
, store
.key
, section_len
+1)) {
571 store
.state
= SECTION_END_SEEN
;
576 * Do not increment matches: this is no match, but we
577 * just made sure we are in the desired section.
579 store
.offset
[store
.seen
] = ftell(config_file
);
581 case SECTION_END_SEEN
:
583 if (matches(key
, value
)) {
584 store
.offset
[store
.seen
] = ftell(config_file
);
585 store
.state
= KEY_SEEN
;
588 if (strrchr(key
, '.') - key
== store
.baselen
&&
589 !strncmp(key
, store
.key
, store
.baselen
)) {
590 store
.state
= SECTION_SEEN
;
591 store
.offset
[store
.seen
] = ftell(config_file
);
598 static int write_error(void)
600 fprintf(stderr
, "Failed to write new configuration file\n");
602 /* Same error code as "failed to rename". */
606 static int store_write_section(int fd
, const char* key
)
608 const char *dot
= strchr(key
, '.');
609 int len1
= store
.baselen
, len2
= -1;
611 dot
= strchr(key
, '.');
613 int dotlen
= dot
- key
;
615 len2
= len1
- dotlen
- 1;
620 if (write_in_full(fd
, "[", 1) != 1 ||
621 write_in_full(fd
, key
, len1
) != len1
)
624 if (write_in_full(fd
, " \"", 2) != 2)
626 while (--len2
>= 0) {
627 unsigned char c
= *++dot
;
629 if (write_in_full(fd
, "\\", 1) != 1)
631 if (write_in_full(fd
, &c
, 1) != 1)
634 if (write_in_full(fd
, "\"", 1) != 1)
637 if (write_in_full(fd
, "]\n", 2) != 2)
643 static int store_write_pair(int fd
, const char* key
, const char* value
)
646 int length
= strlen(key
+store
.baselen
+1);
650 * Check to see if the value needs to be surrounded with a dq pair.
651 * Note that problematic characters are always backslash-quoted; this
652 * check is about not losing leading or trailing SP and strings that
653 * follow beginning-of-comment characters (i.e. ';' and '#') by the
654 * configuration parser.
658 for (i
= 0; value
[i
]; i
++)
659 if (value
[i
] == ';' || value
[i
] == '#')
661 if (i
&& value
[i
-1] == ' ')
664 if (write_in_full(fd
, "\t", 1) != 1 ||
665 write_in_full(fd
, key
+store
.baselen
+1, length
) != length
||
666 write_in_full(fd
, " = ", 3) != 3)
668 if (quote
&& write_in_full(fd
, "\"", 1) != 1)
670 for (i
= 0; value
[i
]; i
++)
673 if (write_in_full(fd
, "\\n", 2) != 2)
677 if (write_in_full(fd
, "\\t", 2) != 2)
682 if (write_in_full(fd
, "\\", 1) != 1)
685 if (write_in_full(fd
, value
+i
, 1) != 1)
689 if (quote
&& write_in_full(fd
, "\"", 1) != 1)
691 if (write_in_full(fd
, "\n", 1) != 1)
696 static ssize_t
find_beginning_of_line(const char* contents
, size_t size
,
697 size_t offset_
, int* found_bracket
)
699 size_t equal_offset
= size
, bracket_offset
= size
;
702 for (offset
= offset_
-2; offset
> 0
703 && contents
[offset
] != '\n'; offset
--)
704 switch (contents
[offset
]) {
705 case '=': equal_offset
= offset
; break;
706 case ']': bracket_offset
= offset
; break;
708 if (bracket_offset
< equal_offset
) {
710 offset
= bracket_offset
+1;
717 int git_config_set(const char* key
, const char* value
)
719 return git_config_set_multivar(key
, value
, NULL
, 0);
723 * If value==NULL, unset in (remove from) config,
724 * if value_regex!=NULL, disregard key/value pairs where value does not match.
725 * if multi_replace==0, nothing, or only one matching key/value is replaced,
726 * else all matching key/values (regardless how many) are removed,
727 * before the new pair is written.
729 * Returns 0 on success.
731 * This function does this:
733 * - it locks the config file by creating ".git/config.lock"
735 * - it then parses the config using store_aux() as validator to find
736 * the position on the key/value pair to replace. If it is to be unset,
737 * it must be found exactly once.
739 * - the config file is mmap()ed and the part before the match (if any) is
740 * written to the lock file, then the changed part and the rest.
742 * - the config file is removed and the lock file rename()d to it.
745 int git_config_set_multivar(const char* key
, const char* value
,
746 const char* value_regex
, int multi_replace
)
751 char* config_filename
;
752 struct lock_file
*lock
= NULL
;
753 const char* last_dot
= strrchr(key
, '.');
755 config_filename
= getenv(CONFIG_ENVIRONMENT
);
756 if (!config_filename
) {
757 config_filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
758 if (!config_filename
)
759 config_filename
= git_path("config");
761 config_filename
= xstrdup(config_filename
);
764 * Since "key" actually contains the section name and the real
765 * key name separated by a dot, we have to know where the dot is.
768 if (last_dot
== NULL
) {
769 fprintf(stderr
, "key does not contain a section: %s\n", key
);
773 store
.baselen
= last_dot
- key
;
775 store
.multi_replace
= multi_replace
;
778 * Validate the key and while at it, lower case it for matching.
780 store
.key
= xmalloc(strlen(key
) + 1);
782 for (i
= 0; key
[i
]; i
++) {
783 unsigned char c
= key
[i
];
786 /* Leave the extended basename untouched.. */
787 if (!dot
|| i
> store
.baselen
) {
788 if (!iskeychar(c
) || (i
== store
.baselen
+1 && !isalpha(c
))) {
789 fprintf(stderr
, "invalid key: %s\n", key
);
795 } else if (c
== '\n') {
796 fprintf(stderr
, "invalid key (newline): %s\n", key
);
806 * The lock serves a purpose in addition to locking: the new
807 * contents of .git/config will be written into it.
809 lock
= xcalloc(sizeof(struct lock_file
), 1);
810 fd
= hold_lock_file_for_update(lock
, config_filename
, 0);
812 fprintf(stderr
, "could not lock config file\n");
819 * If .git/config does not exist yet, write a minimal version.
821 in_fd
= open(config_filename
, O_RDONLY
);
825 if ( ENOENT
!= errno
) {
826 error("opening %s: %s", config_filename
,
828 ret
= 3; /* same as "invalid config file" */
831 /* if nothing to unset, error out */
837 store
.key
= (char*)key
;
838 if (!store_write_section(fd
, key
) ||
839 !store_write_pair(fd
, key
, value
))
844 size_t contents_sz
, copy_begin
, copy_end
;
847 if (value_regex
== NULL
)
848 store
.value_regex
= NULL
;
850 if (value_regex
[0] == '!') {
851 store
.do_not_match
= 1;
854 store
.do_not_match
= 0;
856 store
.value_regex
= (regex_t
*)xmalloc(sizeof(regex_t
));
857 if (regcomp(store
.value_regex
, value_regex
,
859 fprintf(stderr
, "Invalid pattern: %s\n",
861 free(store
.value_regex
);
872 * After this, store.offset will contain the *end* offset
873 * of the last match, or remain at 0 if no match was found.
874 * As a side effect, we make sure to transform only a valid
875 * existing config file.
877 if (git_config_from_file(store_aux
, config_filename
)) {
878 fprintf(stderr
, "invalid config file\n");
880 if (store
.value_regex
!= NULL
) {
881 regfree(store
.value_regex
);
882 free(store
.value_regex
);
889 if (store
.value_regex
!= NULL
) {
890 regfree(store
.value_regex
);
891 free(store
.value_regex
);
894 /* if nothing to unset, or too many matches, error out */
895 if ((store
.seen
== 0 && value
== NULL
) ||
896 (store
.seen
> 1 && multi_replace
== 0)) {
902 contents_sz
= xsize_t(st
.st_size
);
903 contents
= xmmap(NULL
, contents_sz
, PROT_READ
,
904 MAP_PRIVATE
, in_fd
, 0);
910 for (i
= 0, copy_begin
= 0; i
< store
.seen
; i
++) {
911 if (store
.offset
[i
] == 0) {
912 store
.offset
[i
] = copy_end
= contents_sz
;
913 } else if (store
.state
!= KEY_SEEN
) {
914 copy_end
= store
.offset
[i
];
916 copy_end
= find_beginning_of_line(
917 contents
, contents_sz
,
918 store
.offset
[i
]-2, &new_line
);
920 /* write the first part of the config */
921 if (copy_end
> copy_begin
) {
922 if (write_in_full(fd
, contents
+ copy_begin
,
923 copy_end
- copy_begin
) <
924 copy_end
- copy_begin
)
927 write_in_full(fd
, "\n", 1) != 1)
930 copy_begin
= store
.offset
[i
];
933 /* write the pair (value == NULL means unset) */
935 if (store
.state
== START
) {
936 if (!store_write_section(fd
, key
))
939 if (!store_write_pair(fd
, key
, value
))
943 /* write the rest of the config */
944 if (copy_begin
< contents_sz
)
945 if (write_in_full(fd
, contents
+ copy_begin
,
946 contents_sz
- copy_begin
) <
947 contents_sz
- copy_begin
)
950 munmap(contents
, contents_sz
);
953 if (close(fd
) || commit_lock_file(lock
) < 0) {
954 fprintf(stderr
, "Cannot commit config file!\n");
959 /* fd is closed, so don't try to close it below. */
962 * lock is committed, so don't try to roll it back below.
963 * NOTE: Since lockfile.c keeps a linked list of all created
964 * lock_file structures, it isn't safe to free(lock). It's
965 * better to just leave it hanging around.
974 rollback_lock_file(lock
);
975 free(config_filename
);
984 static int section_name_match (const char *buf
, const char *name
)
986 int i
= 0, j
= 0, dot
= 0;
987 for (; buf
[i
] && buf
[i
] != ']'; i
++) {
988 if (!dot
&& isspace(buf
[i
])) {
990 if (name
[j
++] != '.')
992 for (i
++; isspace(buf
[i
]); i
++)
998 if (buf
[i
] == '\\' && dot
)
1000 else if (buf
[i
] == '"' && dot
) {
1001 for (i
++; isspace(buf
[i
]); i
++)
1005 if (buf
[i
] != name
[j
++])
1008 return (buf
[i
] == ']' && name
[j
] == 0);
1011 /* if new_name == NULL, the section is removed instead */
1012 int git_config_rename_section(const char *old_name
, const char *new_name
)
1014 int ret
= 0, remove
= 0;
1015 char *config_filename
;
1016 struct lock_file
*lock
= xcalloc(sizeof(struct lock_file
), 1);
1020 config_filename
= getenv(CONFIG_ENVIRONMENT
);
1021 if (!config_filename
) {
1022 config_filename
= getenv(CONFIG_LOCAL_ENVIRONMENT
);
1023 if (!config_filename
)
1024 config_filename
= git_path("config");
1026 config_filename
= xstrdup(config_filename
);
1027 out_fd
= hold_lock_file_for_update(lock
, config_filename
, 0);
1029 ret
= error("Could not lock config file!");
1033 if (!(config_file
= fopen(config_filename
, "rb"))) {
1034 /* no config file means nothing to rename, no error */
1035 goto unlock_and_out
;
1038 while (fgets(buf
, sizeof(buf
), config_file
)) {
1041 for (i
= 0; buf
[i
] && isspace(buf
[i
]); i
++)
1043 if (buf
[i
] == '[') {
1044 /* it's a section */
1045 if (section_name_match (&buf
[i
+1], old_name
)) {
1047 if (new_name
== NULL
) {
1051 store
.baselen
= strlen(new_name
);
1052 if (!store_write_section(out_fd
, new_name
)) {
1053 ret
= write_error();
1062 length
= strlen(buf
);
1063 if (write_in_full(out_fd
, buf
, length
) != length
) {
1064 ret
= write_error();
1068 fclose(config_file
);
1070 if (close(out_fd
) || commit_lock_file(lock
) < 0)
1071 ret
= error("Cannot commit config file!");
1073 free(config_filename
);