2 * Utilities for paths and pathnames
6 #include "string-list.h"
9 #include "submodule-config.h"
11 static int get_st_mode_bits(const char *path
, int *mode
)
14 if (lstat(path
, &st
) < 0)
20 static char bad_path
[] = "/bad-path/";
22 static struct strbuf
*get_pathname(void)
24 static struct strbuf pathname_array
[4] = {
25 STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
28 struct strbuf
*sb
= &pathname_array
[3 & ++index
];
33 static char *cleanup_path(char *path
)
36 if (!memcmp(path
, "./", 2)) {
44 static void strbuf_cleanup_path(struct strbuf
*sb
)
46 char *path
= cleanup_path(sb
->buf
);
48 strbuf_remove(sb
, 0, path
- sb
->buf
);
51 char *mksnpath(char *buf
, size_t n
, const char *fmt
, ...)
57 len
= vsnprintf(buf
, n
, fmt
, args
);
60 strlcpy(buf
, bad_path
, n
);
63 return cleanup_path(buf
);
66 static int dir_prefix(const char *buf
, const char *dir
)
68 int len
= strlen(dir
);
69 return !strncmp(buf
, dir
, len
) &&
70 (is_dir_sep(buf
[len
]) || buf
[len
] == '\0');
73 /* $buf =~ m|$dir/+$file| but without regex */
74 static int is_dir_file(const char *buf
, const char *dir
, const char *file
)
76 int len
= strlen(dir
);
77 if (strncmp(buf
, dir
, len
) || !is_dir_sep(buf
[len
]))
79 while (is_dir_sep(buf
[len
]))
81 return !strcmp(buf
+ len
, file
);
84 static void replace_dir(struct strbuf
*buf
, int len
, const char *newdir
)
86 int newlen
= strlen(newdir
);
87 int need_sep
= (buf
->buf
[len
] && !is_dir_sep(buf
->buf
[len
])) &&
88 !is_dir_sep(newdir
[newlen
- 1]);
90 len
--; /* keep one char, to be replaced with '/' */
91 strbuf_splice(buf
, 0, len
, newdir
, newlen
);
93 buf
->buf
[newlen
] = '/';
97 /* Not considered garbage for report_linked_checkout_garbage */
98 unsigned ignore_garbage
:1;
100 /* Not common even though its parent is */
105 static struct common_dir common_list
[] = {
106 { 0, 1, 0, "branches" },
107 { 0, 1, 0, "hooks" },
109 { 0, 0, 1, "info/sparse-checkout" },
111 { 1, 1, 1, "logs/HEAD" },
112 { 0, 1, 1, "logs/refs/bisect" },
113 { 0, 1, 0, "lost-found" },
114 { 0, 1, 0, "objects" },
116 { 0, 1, 1, "refs/bisect" },
117 { 0, 1, 0, "remotes" },
118 { 0, 1, 0, "worktrees" },
119 { 0, 1, 0, "rr-cache" },
121 { 0, 0, 0, "config" },
122 { 1, 0, 0, "gc.pid" },
123 { 0, 0, 0, "packed-refs" },
124 { 0, 0, 0, "shallow" },
129 * A compressed trie. A trie node consists of zero or more characters that
130 * are common to all elements with this prefix, optionally followed by some
131 * children. If value is not NULL, the trie node is a terminal node.
133 * For example, consider the following set of strings:
139 * The trie would look like:
140 * root: len = 0, children a and d non-NULL, value = NULL.
141 * a: len = 2, contents = bc, value = (data for "abc")
142 * d: len = 2, contents = ef, children i non-NULL, value = (data for "def")
143 * i: len = 3, contents = nit, children e and i non-NULL, value = NULL
144 * e: len = 0, children all NULL, value = (data for "definite")
145 * i: len = 2, contents = on, children all NULL,
146 * value = (data for "definition")
149 struct trie
*children
[256];
155 static struct trie
*make_trie_node(const char *key
, void *value
)
157 struct trie
*new_node
= xcalloc(1, sizeof(*new_node
));
158 new_node
->len
= strlen(key
);
160 new_node
->contents
= xmalloc(new_node
->len
);
161 memcpy(new_node
->contents
, key
, new_node
->len
);
163 new_node
->value
= value
;
168 * Add a key/value pair to a trie. The key is assumed to be \0-terminated.
169 * If there was an existing value for this key, return it.
171 static void *add_to_trie(struct trie
*root
, const char *key
, void *value
)
178 /* we have reached the end of the key */
184 for (i
= 0; i
< root
->len
; i
++) {
185 if (root
->contents
[i
] == key
[i
])
189 * Split this node: child will contain this node's
192 child
= malloc(sizeof(*child
));
193 memcpy(child
->children
, root
->children
, sizeof(root
->children
));
195 child
->len
= root
->len
- i
- 1;
197 child
->contents
= xstrndup(root
->contents
+ i
+ 1,
200 child
->value
= root
->value
;
204 memset(root
->children
, 0, sizeof(root
->children
));
205 root
->children
[(unsigned char)root
->contents
[i
]] = child
;
207 /* This is the newly-added child. */
208 root
->children
[(unsigned char)key
[i
]] =
209 make_trie_node(key
+ i
+ 1, value
);
213 /* We have matched the entire compressed section */
215 child
= root
->children
[(unsigned char)key
[root
->len
]];
217 return add_to_trie(child
, key
+ root
->len
+ 1, value
);
219 child
= make_trie_node(key
+ root
->len
+ 1, value
);
220 root
->children
[(unsigned char)key
[root
->len
]] = child
;
230 typedef int (*match_fn
)(const char *unmatched
, void *data
, void *baton
);
233 * Search a trie for some key. Find the longest /-or-\0-terminated
234 * prefix of the key for which the trie contains a value. Call fn
235 * with the unmatched portion of the key and the found value, and
236 * return its return value. If there is no such prefix, return -1.
238 * The key is partially normalized: consecutive slashes are skipped.
240 * For example, consider the trie containing only [refs,
241 * refs/worktree] (both with values).
243 * | key | unmatched | val from node | return value |
244 * |-----------------|------------|---------------|--------------|
245 * | a | not called | n/a | -1 |
246 * | refs | \0 | refs | as per fn |
247 * | refs/ | / | refs | as per fn |
248 * | refs/w | /w | refs | as per fn |
249 * | refs/worktree | \0 | refs/worktree | as per fn |
250 * | refs/worktree/ | / | refs/worktree | as per fn |
251 * | refs/worktree/a | /a | refs/worktree | as per fn |
252 * |-----------------|------------|---------------|--------------|
255 static int trie_find(struct trie
*root
, const char *key
, match_fn fn
,
263 /* we have reached the end of the key */
264 if (root
->value
&& !root
->len
)
265 return fn(key
, root
->value
, baton
);
270 for (i
= 0; i
< root
->len
; i
++) {
271 /* Partial path normalization: skip consecutive slashes. */
272 if (key
[i
] == '/' && key
[i
+1] == '/') {
276 if (root
->contents
[i
] != key
[i
])
280 /* Matched the entire compressed section */
284 return fn(key
, root
->value
, baton
);
286 /* Partial path normalization: skip consecutive slashes */
287 while (key
[0] == '/' && key
[1] == '/')
290 child
= root
->children
[(unsigned char)*key
];
292 result
= trie_find(child
, key
+ 1, fn
, baton
);
296 if (result
>= 0 || (*key
!= '/' && *key
!= 0))
299 return fn(key
, root
->value
, baton
);
304 static struct trie common_trie
;
305 static int common_trie_done_setup
;
307 static void init_common_trie(void)
309 struct common_dir
*p
;
311 if (common_trie_done_setup
)
314 for (p
= common_list
; p
->dirname
; p
++)
315 add_to_trie(&common_trie
, p
->dirname
, p
);
317 common_trie_done_setup
= 1;
321 * Helper function for update_common_dir: returns 1 if the dir
324 static int check_common(const char *unmatched
, void *value
, void *baton
)
326 struct common_dir
*dir
= value
;
331 if (dir
->is_dir
&& (unmatched
[0] == 0 || unmatched
[0] == '/'))
332 return !dir
->exclude
;
334 if (!dir
->is_dir
&& unmatched
[0] == 0)
335 return !dir
->exclude
;
340 static void update_common_dir(struct strbuf
*buf
, int git_dir_len
,
341 const char *common_dir
)
343 char *base
= buf
->buf
+ git_dir_len
;
346 common_dir
= get_git_common_dir();
347 if (trie_find(&common_trie
, base
, check_common
, NULL
) > 0)
348 replace_dir(buf
, git_dir_len
, common_dir
);
351 void report_linked_checkout_garbage(void)
353 struct strbuf sb
= STRBUF_INIT
;
354 const struct common_dir
*p
;
357 if (!git_common_dir_env
)
359 strbuf_addf(&sb
, "%s/", get_git_dir());
361 for (p
= common_list
; p
->dirname
; p
++) {
362 const char *path
= p
->dirname
;
363 if (p
->ignore_garbage
)
365 strbuf_setlen(&sb
, len
);
366 strbuf_addstr(&sb
, path
);
367 if (file_exists(sb
.buf
))
368 report_garbage(PACKDIR_FILE_GARBAGE
, sb
.buf
);
373 static void adjust_git_path(struct strbuf
*buf
, int git_dir_len
)
375 const char *base
= buf
->buf
+ git_dir_len
;
376 if (git_graft_env
&& is_dir_file(base
, "info", "grafts"))
377 strbuf_splice(buf
, 0, buf
->len
,
378 get_graft_file(), strlen(get_graft_file()));
379 else if (git_index_env
&& !strcmp(base
, "index"))
380 strbuf_splice(buf
, 0, buf
->len
,
381 get_index_file(), strlen(get_index_file()));
382 else if (git_db_env
&& dir_prefix(base
, "objects"))
383 replace_dir(buf
, git_dir_len
+ 7, get_object_directory());
384 else if (git_common_dir_env
)
385 update_common_dir(buf
, git_dir_len
, NULL
);
388 static void do_git_path(const struct worktree
*wt
, struct strbuf
*buf
,
389 const char *fmt
, va_list args
)
392 strbuf_addstr(buf
, get_worktree_git_dir(wt
));
393 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
394 strbuf_addch(buf
, '/');
395 gitdir_len
= buf
->len
;
396 strbuf_vaddf(buf
, fmt
, args
);
397 adjust_git_path(buf
, gitdir_len
);
398 strbuf_cleanup_path(buf
);
401 char *git_path_buf(struct strbuf
*buf
, const char *fmt
, ...)
406 do_git_path(NULL
, buf
, fmt
, args
);
411 void strbuf_git_path(struct strbuf
*sb
, const char *fmt
, ...)
415 do_git_path(NULL
, sb
, fmt
, args
);
419 const char *git_path(const char *fmt
, ...)
421 struct strbuf
*pathname
= get_pathname();
424 do_git_path(NULL
, pathname
, fmt
, args
);
426 return pathname
->buf
;
429 char *git_pathdup(const char *fmt
, ...)
431 struct strbuf path
= STRBUF_INIT
;
434 do_git_path(NULL
, &path
, fmt
, args
);
436 return strbuf_detach(&path
, NULL
);
439 char *mkpathdup(const char *fmt
, ...)
441 struct strbuf sb
= STRBUF_INIT
;
444 strbuf_vaddf(&sb
, fmt
, args
);
446 strbuf_cleanup_path(&sb
);
447 return strbuf_detach(&sb
, NULL
);
450 const char *mkpath(const char *fmt
, ...)
453 struct strbuf
*pathname
= get_pathname();
455 strbuf_vaddf(pathname
, fmt
, args
);
457 return cleanup_path(pathname
->buf
);
460 const char *worktree_git_path(const struct worktree
*wt
, const char *fmt
, ...)
462 struct strbuf
*pathname
= get_pathname();
465 do_git_path(wt
, pathname
, fmt
, args
);
467 return pathname
->buf
;
470 /* Returns 0 on success, negative on failure. */
471 #define SUBMODULE_PATH_ERR_NOT_CONFIGURED -1
472 static int do_submodule_path(struct strbuf
*buf
, const char *path
,
473 const char *fmt
, va_list args
)
476 struct strbuf git_submodule_common_dir
= STRBUF_INIT
;
477 struct strbuf git_submodule_dir
= STRBUF_INIT
;
478 const struct submodule
*sub
;
481 strbuf_addstr(buf
, path
);
482 strbuf_complete(buf
, '/');
483 strbuf_addstr(buf
, ".git");
485 git_dir
= read_gitfile(buf
->buf
);
488 strbuf_addstr(buf
, git_dir
);
490 if (!is_git_directory(buf
->buf
)) {
492 sub
= submodule_from_path(null_sha1
, path
);
494 err
= SUBMODULE_PATH_ERR_NOT_CONFIGURED
;
498 strbuf_git_path(buf
, "%s/%s", "modules", sub
->name
);
501 strbuf_addch(buf
, '/');
502 strbuf_addbuf(&git_submodule_dir
, buf
);
504 strbuf_vaddf(buf
, fmt
, args
);
506 if (get_common_dir_noenv(&git_submodule_common_dir
, git_submodule_dir
.buf
))
507 update_common_dir(buf
, git_submodule_dir
.len
, git_submodule_common_dir
.buf
);
509 strbuf_cleanup_path(buf
);
512 strbuf_release(&git_submodule_dir
);
513 strbuf_release(&git_submodule_common_dir
);
518 char *git_pathdup_submodule(const char *path
, const char *fmt
, ...)
522 struct strbuf buf
= STRBUF_INIT
;
524 err
= do_submodule_path(&buf
, path
, fmt
, args
);
527 strbuf_release(&buf
);
530 return strbuf_detach(&buf
, NULL
);
533 int strbuf_git_path_submodule(struct strbuf
*buf
, const char *path
,
534 const char *fmt
, ...)
539 err
= do_submodule_path(buf
, path
, fmt
, args
);
545 static void do_git_common_path(struct strbuf
*buf
,
549 strbuf_addstr(buf
, get_git_common_dir());
550 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
551 strbuf_addch(buf
, '/');
552 strbuf_vaddf(buf
, fmt
, args
);
553 strbuf_cleanup_path(buf
);
556 const char *git_common_path(const char *fmt
, ...)
558 struct strbuf
*pathname
= get_pathname();
561 do_git_common_path(pathname
, fmt
, args
);
563 return pathname
->buf
;
566 void strbuf_git_common_path(struct strbuf
*sb
, const char *fmt
, ...)
570 do_git_common_path(sb
, fmt
, args
);
574 int validate_headref(const char *path
)
577 char *buf
, buffer
[256];
578 unsigned char sha1
[20];
582 if (lstat(path
, &st
) < 0)
585 /* Make sure it is a "refs/.." symlink */
586 if (S_ISLNK(st
.st_mode
)) {
587 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
588 if (len
>= 5 && !memcmp("refs/", buffer
, 5))
594 * Anything else, just open it and try to see if it is a symbolic ref.
596 fd
= open(path
, O_RDONLY
);
599 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
603 * Is it a symbolic ref?
607 if (!memcmp("ref:", buffer
, 4)) {
610 while (len
&& isspace(*buf
))
612 if (len
>= 5 && !memcmp("refs/", buf
, 5))
617 * Is this a detached HEAD?
619 if (!get_sha1_hex(buffer
, sha1
))
625 static struct passwd
*getpw_str(const char *username
, size_t len
)
628 char *username_z
= xmemdupz(username
, len
);
629 pw
= getpwnam(username_z
);
635 * Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
636 * then it is a newly allocated string. Returns NULL on getpw failure or
639 char *expand_user_path(const char *path
)
641 struct strbuf user_path
= STRBUF_INIT
;
642 const char *to_copy
= path
;
646 if (path
[0] == '~') {
647 const char *first_slash
= strchrnul(path
, '/');
648 const char *username
= path
+ 1;
649 size_t username_len
= first_slash
- username
;
650 if (username_len
== 0) {
651 const char *home
= getenv("HOME");
654 strbuf_addstr(&user_path
, home
);
655 #ifdef GIT_WINDOWS_NATIVE
656 convert_slashes(user_path
.buf
);
659 struct passwd
*pw
= getpw_str(username
, username_len
);
662 strbuf_addstr(&user_path
, pw
->pw_dir
);
664 to_copy
= first_slash
;
666 strbuf_addstr(&user_path
, to_copy
);
667 return strbuf_detach(&user_path
, NULL
);
669 strbuf_release(&user_path
);
674 * First, one directory to try is determined by the following algorithm.
676 * (0) If "strict" is given, the path is used as given and no DWIM is
678 * (1) "~/path" to mean path under the running user's home directory;
679 * (2) "~user/path" to mean path under named user's home directory;
680 * (3) "relative/path" to mean cwd relative directory; or
681 * (4) "/absolute/path" to mean absolute directory.
683 * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git"
684 * in this order. We select the first one that is a valid git repository, and
685 * chdir() to it. If none match, or we fail to chdir, we return NULL.
687 * If all goes well, we return the directory we used to chdir() (but
688 * before ~user is expanded), avoiding getcwd() resolving symbolic
689 * links. User relative paths are also returned as they are given,
690 * except DWIM suffixing.
692 const char *enter_repo(const char *path
, int strict
)
694 static struct strbuf validated_path
= STRBUF_INIT
;
695 static struct strbuf used_path
= STRBUF_INIT
;
701 static const char *suffix
[] = {
702 "/.git", "", ".git/.git", ".git", NULL
,
705 int len
= strlen(path
);
707 while ((1 < len
) && (path
[len
-1] == '/'))
711 * We can handle arbitrary-sized buffers, but this remains as a
712 * sanity check on untrusted input.
717 strbuf_reset(&used_path
);
718 strbuf_reset(&validated_path
);
719 strbuf_add(&used_path
, path
, len
);
720 strbuf_add(&validated_path
, path
, len
);
722 if (used_path
.buf
[0] == '~') {
723 char *newpath
= expand_user_path(used_path
.buf
);
726 strbuf_attach(&used_path
, newpath
, strlen(newpath
),
729 for (i
= 0; suffix
[i
]; i
++) {
731 size_t baselen
= used_path
.len
;
732 strbuf_addstr(&used_path
, suffix
[i
]);
733 if (!stat(used_path
.buf
, &st
) &&
734 (S_ISREG(st
.st_mode
) ||
735 (S_ISDIR(st
.st_mode
) && is_git_directory(used_path
.buf
)))) {
736 strbuf_addstr(&validated_path
, suffix
[i
]);
739 strbuf_setlen(&used_path
, baselen
);
743 gitfile
= read_gitfile(used_path
.buf
);
745 strbuf_reset(&used_path
);
746 strbuf_addstr(&used_path
, gitfile
);
748 if (chdir(used_path
.buf
))
750 path
= validated_path
.buf
;
753 const char *gitfile
= read_gitfile(path
);
760 if (is_git_directory(".")) {
762 check_repository_format();
769 static int calc_shared_perm(int mode
)
773 if (get_shared_repository() < 0)
774 tweak
= -get_shared_repository();
776 tweak
= get_shared_repository();
778 if (!(mode
& S_IWUSR
))
781 /* Copy read bits to execute bits */
782 tweak
|= (tweak
& 0444) >> 2;
783 if (get_shared_repository() < 0)
784 mode
= (mode
& ~0777) | tweak
;
792 int adjust_shared_perm(const char *path
)
794 int old_mode
, new_mode
;
796 if (!get_shared_repository())
798 if (get_st_mode_bits(path
, &old_mode
) < 0)
801 new_mode
= calc_shared_perm(old_mode
);
802 if (S_ISDIR(old_mode
)) {
803 /* Copy read bits to execute bits */
804 new_mode
|= (new_mode
& 0444) >> 2;
805 new_mode
|= FORCE_DIR_SET_GID
;
808 if (((old_mode
^ new_mode
) & ~S_IFMT
) &&
809 chmod(path
, (new_mode
& ~S_IFMT
)) < 0)
814 void safe_create_dir(const char *dir
, int share
)
816 if (mkdir(dir
, 0777) < 0) {
817 if (errno
!= EEXIST
) {
822 else if (share
&& adjust_shared_perm(dir
))
823 die(_("Could not make %s writable by group"), dir
);
826 static int have_same_root(const char *path1
, const char *path2
)
828 int is_abs1
, is_abs2
;
830 is_abs1
= is_absolute_path(path1
);
831 is_abs2
= is_absolute_path(path2
);
832 return (is_abs1
&& is_abs2
&& tolower(path1
[0]) == tolower(path2
[0])) ||
833 (!is_abs1
&& !is_abs2
);
837 * Give path as relative to prefix.
839 * The strbuf may or may not be used, so do not assume it contains the
842 const char *relative_path(const char *in
, const char *prefix
,
845 int in_len
= in
? strlen(in
) : 0;
846 int prefix_len
= prefix
? strlen(prefix
) : 0;
853 else if (!prefix_len
)
856 if (have_same_root(in
, prefix
))
857 /* bypass dos_drive, for "c:" is identical to "C:" */
858 i
= j
= has_dos_drive_prefix(in
);
863 while (i
< prefix_len
&& j
< in_len
&& prefix
[i
] == in
[j
]) {
864 if (is_dir_sep(prefix
[i
])) {
865 while (is_dir_sep(prefix
[i
]))
867 while (is_dir_sep(in
[j
]))
878 /* "prefix" seems like prefix of "in" */
881 * but "/foo" is not a prefix of "/foobar"
882 * (i.e. prefix not end with '/')
884 prefix_off
< prefix_len
) {
886 /* in="/a/b", prefix="/a/b" */
888 } else if (is_dir_sep(in
[j
])) {
889 /* in="/a/b/c", prefix="/a/b" */
890 while (is_dir_sep(in
[j
]))
894 /* in="/a/bbb/c", prefix="/a/b" */
898 /* "in" is short than "prefix" */
900 /* "in" not end with '/' */
902 if (is_dir_sep(prefix
[i
])) {
903 /* in="/a/b", prefix="/a/b/c/" */
904 while (is_dir_sep(prefix
[i
]))
912 if (i
>= prefix_len
) {
920 strbuf_grow(sb
, in_len
);
922 while (i
< prefix_len
) {
923 if (is_dir_sep(prefix
[i
])) {
924 strbuf_addstr(sb
, "../");
925 while (is_dir_sep(prefix
[i
]))
931 if (!is_dir_sep(prefix
[prefix_len
- 1]))
932 strbuf_addstr(sb
, "../");
934 strbuf_addstr(sb
, in
);
940 * A simpler implementation of relative_path
942 * Get relative path by removing "prefix" from "in". This function
943 * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
944 * to increase performance when traversing the path to work_tree.
946 const char *remove_leading_path(const char *in
, const char *prefix
)
948 static struct strbuf buf
= STRBUF_INIT
;
951 if (!prefix
|| !prefix
[0])
954 if (is_dir_sep(prefix
[i
])) {
955 if (!is_dir_sep(in
[j
]))
957 while (is_dir_sep(prefix
[i
]))
959 while (is_dir_sep(in
[j
]))
962 } else if (in
[j
] != prefix
[i
]) {
969 /* "/foo" is a prefix of "/foo" */
971 /* "/foo" is not a prefix of "/foobar" */
972 !is_dir_sep(prefix
[i
-1]) && !is_dir_sep(in
[j
])
975 while (is_dir_sep(in
[j
]))
980 strbuf_addstr(&buf
, ".");
982 strbuf_addstr(&buf
, in
+ j
);
987 * It is okay if dst == src, but they should not overlap otherwise.
989 * Performs the following normalizations on src, storing the result in dst:
990 * - Ensures that components are separated by '/' (Windows only)
991 * - Squashes sequences of '/'.
992 * - Removes "." components.
993 * - Removes ".." components, and the components the precede them.
994 * Returns failure (non-zero) if a ".." component appears as first path
995 * component anytime during the normalization. Otherwise, returns success (0).
997 * Note that this function is purely textual. It does not follow symlinks,
998 * verify the existence of the path, or make any system calls.
1000 * prefix_len != NULL is for a specific case of prefix_pathspec():
1001 * assume that src == dst and src[0..prefix_len-1] is already
1002 * normalized, any time "../" eats up to the prefix_len part,
1003 * prefix_len is reduced. In the end prefix_len is the remaining
1004 * prefix that has not been overridden by user pathspec.
1006 * NEEDSWORK: This function doesn't perform normalization w.r.t. trailing '/'.
1007 * For everything but the root folder itself, the normalized path should not
1008 * end with a '/', then the callers need to be fixed up accordingly.
1011 int normalize_path_copy_len(char *dst
, const char *src
, int *prefix_len
)
1016 for (i
= has_dos_drive_prefix(src
); i
> 0; i
--)
1020 if (is_dir_sep(*src
)) {
1022 while (is_dir_sep(*src
))
1030 * A path component that begins with . could be
1032 * (1) "." and ends -- ignore and terminate.
1033 * (2) "./" -- ignore them, eat slash and continue.
1034 * (3) ".." and ends -- strip one and terminate.
1035 * (4) "../" -- strip one, eat slash and continue.
1041 } else if (is_dir_sep(src
[1])) {
1044 while (is_dir_sep(*src
))
1047 } else if (src
[1] == '.') {
1052 } else if (is_dir_sep(src
[2])) {
1055 while (is_dir_sep(*src
))
1062 /* copy up to the next '/', and eat all '/' */
1063 while ((c
= *src
++) != '\0' && !is_dir_sep(c
))
1065 if (is_dir_sep(c
)) {
1067 while (is_dir_sep(c
))
1076 * dst0..dst is prefix portion, and dst[-1] is '/';
1079 dst
--; /* go to trailing '/' */
1082 /* Windows: dst[-1] cannot be backslash anymore */
1083 while (dst0
< dst
&& dst
[-1] != '/')
1085 if (prefix_len
&& *prefix_len
> dst
- dst0
)
1086 *prefix_len
= dst
- dst0
;
1092 int normalize_path_copy(char *dst
, const char *src
)
1094 return normalize_path_copy_len(dst
, src
, NULL
);
1098 * path = Canonical absolute path
1099 * prefixes = string_list containing normalized, absolute paths without
1100 * trailing slashes (except for the root directory, which is denoted by "/").
1102 * Determines, for each path in prefixes, whether the "prefix"
1103 * is an ancestor directory of path. Returns the length of the longest
1104 * ancestor directory, excluding any trailing slashes, or -1 if no prefix
1105 * is an ancestor. (Note that this means 0 is returned if prefixes is
1106 * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
1107 * are not considered to be their own ancestors. path must be in a
1108 * canonical form: empty components, or "." or ".." components are not
1111 int longest_ancestor_length(const char *path
, struct string_list
*prefixes
)
1113 int i
, max_len
= -1;
1115 if (!strcmp(path
, "/"))
1118 for (i
= 0; i
< prefixes
->nr
; i
++) {
1119 const char *ceil
= prefixes
->items
[i
].string
;
1120 int len
= strlen(ceil
);
1122 if (len
== 1 && ceil
[0] == '/')
1123 len
= 0; /* root matches anything, with length 0 */
1124 else if (!strncmp(path
, ceil
, len
) && path
[len
] == '/')
1125 ; /* match of length len */
1127 continue; /* no match */
1136 /* strip arbitrary amount of directory separators at end of path */
1137 static inline int chomp_trailing_dir_sep(const char *path
, int len
)
1139 while (len
&& is_dir_sep(path
[len
- 1]))
1145 * If path ends with suffix (complete path components), returns the
1146 * part before suffix (sans trailing directory separators).
1147 * Otherwise returns NULL.
1149 char *strip_path_suffix(const char *path
, const char *suffix
)
1151 int path_len
= strlen(path
), suffix_len
= strlen(suffix
);
1153 while (suffix_len
) {
1157 if (is_dir_sep(path
[path_len
- 1])) {
1158 if (!is_dir_sep(suffix
[suffix_len
- 1]))
1160 path_len
= chomp_trailing_dir_sep(path
, path_len
);
1161 suffix_len
= chomp_trailing_dir_sep(suffix
, suffix_len
);
1163 else if (path
[--path_len
] != suffix
[--suffix_len
])
1167 if (path_len
&& !is_dir_sep(path
[path_len
- 1]))
1169 return xstrndup(path
, chomp_trailing_dir_sep(path
, path_len
));
1172 int daemon_avoid_alias(const char *p
)
1177 * This resurrects the belts and suspenders paranoia check by HPA
1178 * done in <435560F7.4080006@zytor.com> thread, now enter_repo()
1179 * does not do getcwd() based path canonicalization.
1181 * sl becomes true immediately after seeing '/' and continues to
1182 * be true as long as dots continue after that without intervening
1183 * non-dot character.
1185 if (!p
|| (*p
!= '/' && *p
!= '~'))
1195 else if (ch
== '/') {
1197 /* reject //, /./ and /../ */
1202 if (0 < ndot
&& ndot
< 3)
1203 /* reject /.$ and /..$ */
1212 else if (ch
== '/') {
1219 static int only_spaces_and_periods(const char *path
, size_t len
, size_t skip
)
1227 if (c
!= ' ' && c
!= '.')
1233 int is_ntfs_dotgit(const char *name
)
1237 for (len
= 0; ; len
++)
1238 if (!name
[len
] || name
[len
] == '\\' || is_dir_sep(name
[len
])) {
1239 if (only_spaces_and_periods(name
, len
, 4) &&
1240 !strncasecmp(name
, ".git", 4))
1242 if (only_spaces_and_periods(name
, len
, 5) &&
1243 !strncasecmp(name
, "git~1", 5))
1245 if (name
[len
] != '\\')
1252 char *xdg_config_home(const char *filename
)
1254 const char *home
, *config_home
;
1257 config_home
= getenv("XDG_CONFIG_HOME");
1258 if (config_home
&& *config_home
)
1259 return mkpathdup("%s/git/%s", config_home
, filename
);
1261 home
= getenv("HOME");
1263 return mkpathdup("%s/.config/git/%s", home
, filename
);
1267 GIT_PATH_FUNC(git_path_cherry_pick_head
, "CHERRY_PICK_HEAD")
1268 GIT_PATH_FUNC(git_path_revert_head
, "REVERT_HEAD")
1269 GIT_PATH_FUNC(git_path_squash_msg
, "SQUASH_MSG")
1270 GIT_PATH_FUNC(git_path_merge_msg
, "MERGE_MSG")
1271 GIT_PATH_FUNC(git_path_merge_rr
, "MERGE_RR")
1272 GIT_PATH_FUNC(git_path_merge_mode
, "MERGE_MODE")
1273 GIT_PATH_FUNC(git_path_merge_head
, "MERGE_HEAD")
1274 GIT_PATH_FUNC(git_path_fetch_head
, "FETCH_HEAD")
1275 GIT_PATH_FUNC(git_path_shallow
, "shallow")