2 * Utilities for paths and pathnames
6 #include "string-list.h"
10 static int get_st_mode_bits(const char *path
, int *mode
)
13 if (lstat(path
, &st
) < 0)
19 static char bad_path
[] = "/bad-path/";
21 static struct strbuf
*get_pathname(void)
23 static struct strbuf pathname_array
[4] = {
24 STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
, STRBUF_INIT
27 struct strbuf
*sb
= &pathname_array
[3 & ++index
];
32 static char *cleanup_path(char *path
)
35 if (!memcmp(path
, "./", 2)) {
43 static void strbuf_cleanup_path(struct strbuf
*sb
)
45 char *path
= cleanup_path(sb
->buf
);
47 strbuf_remove(sb
, 0, path
- sb
->buf
);
50 char *mksnpath(char *buf
, size_t n
, const char *fmt
, ...)
56 len
= vsnprintf(buf
, n
, fmt
, args
);
59 strlcpy(buf
, bad_path
, n
);
62 return cleanup_path(buf
);
65 static int dir_prefix(const char *buf
, const char *dir
)
67 int len
= strlen(dir
);
68 return !strncmp(buf
, dir
, len
) &&
69 (is_dir_sep(buf
[len
]) || buf
[len
] == '\0');
72 /* $buf =~ m|$dir/+$file| but without regex */
73 static int is_dir_file(const char *buf
, const char *dir
, const char *file
)
75 int len
= strlen(dir
);
76 if (strncmp(buf
, dir
, len
) || !is_dir_sep(buf
[len
]))
78 while (is_dir_sep(buf
[len
]))
80 return !strcmp(buf
+ len
, file
);
83 static void replace_dir(struct strbuf
*buf
, int len
, const char *newdir
)
85 int newlen
= strlen(newdir
);
86 int need_sep
= (buf
->buf
[len
] && !is_dir_sep(buf
->buf
[len
])) &&
87 !is_dir_sep(newdir
[newlen
- 1]);
89 len
--; /* keep one char, to be replaced with '/' */
90 strbuf_splice(buf
, 0, len
, newdir
, newlen
);
92 buf
->buf
[newlen
] = '/';
96 /* Not considered garbage for report_linked_checkout_garbage */
97 unsigned ignore_garbage
:1;
99 /* Not common even though its parent is */
104 static struct common_dir common_list
[] = {
105 { 0, 1, 0, "branches" },
106 { 0, 1, 0, "hooks" },
108 { 0, 0, 1, "info/sparse-checkout" },
110 { 1, 1, 1, "logs/HEAD" },
111 { 0, 1, 1, "logs/refs/bisect" },
112 { 0, 1, 0, "lost-found" },
113 { 0, 1, 0, "objects" },
115 { 0, 1, 1, "refs/bisect" },
116 { 0, 1, 0, "remotes" },
117 { 0, 1, 0, "worktrees" },
118 { 0, 1, 0, "rr-cache" },
120 { 0, 0, 0, "config" },
121 { 1, 0, 0, "gc.pid" },
122 { 0, 0, 0, "packed-refs" },
123 { 0, 0, 0, "shallow" },
128 * A compressed trie. A trie node consists of zero or more characters that
129 * are common to all elements with this prefix, optionally followed by some
130 * children. If value is not NULL, the trie node is a terminal node.
132 * For example, consider the following set of strings:
138 * The trie would look like:
139 * root: len = 0, children a and d non-NULL, value = NULL.
140 * a: len = 2, contents = bc, value = (data for "abc")
141 * d: len = 2, contents = ef, children i non-NULL, value = (data for "def")
142 * i: len = 3, contents = nit, children e and i non-NULL, value = NULL
143 * e: len = 0, children all NULL, value = (data for "definite")
144 * i: len = 2, contents = on, children all NULL,
145 * value = (data for "definition")
148 struct trie
*children
[256];
154 static struct trie
*make_trie_node(const char *key
, void *value
)
156 struct trie
*new_node
= xcalloc(1, sizeof(*new_node
));
157 new_node
->len
= strlen(key
);
159 new_node
->contents
= xmalloc(new_node
->len
);
160 memcpy(new_node
->contents
, key
, new_node
->len
);
162 new_node
->value
= value
;
167 * Add a key/value pair to a trie. The key is assumed to be \0-terminated.
168 * If there was an existing value for this key, return it.
170 static void *add_to_trie(struct trie
*root
, const char *key
, void *value
)
177 /* we have reached the end of the key */
183 for (i
= 0; i
< root
->len
; i
++) {
184 if (root
->contents
[i
] == key
[i
])
188 * Split this node: child will contain this node's
191 child
= malloc(sizeof(*child
));
192 memcpy(child
->children
, root
->children
, sizeof(root
->children
));
194 child
->len
= root
->len
- i
- 1;
196 child
->contents
= xstrndup(root
->contents
+ i
+ 1,
199 child
->value
= root
->value
;
203 memset(root
->children
, 0, sizeof(root
->children
));
204 root
->children
[(unsigned char)root
->contents
[i
]] = child
;
206 /* This is the newly-added child. */
207 root
->children
[(unsigned char)key
[i
]] =
208 make_trie_node(key
+ i
+ 1, value
);
212 /* We have matched the entire compressed section */
214 child
= root
->children
[(unsigned char)key
[root
->len
]];
216 return add_to_trie(child
, key
+ root
->len
+ 1, value
);
218 child
= make_trie_node(key
+ root
->len
+ 1, value
);
219 root
->children
[(unsigned char)key
[root
->len
]] = child
;
229 typedef int (*match_fn
)(const char *unmatched
, void *data
, void *baton
);
232 * Search a trie for some key. Find the longest /-or-\0-terminated
233 * prefix of the key for which the trie contains a value. Call fn
234 * with the unmatched portion of the key and the found value, and
235 * return its return value. If there is no such prefix, return -1.
237 * The key is partially normalized: consecutive slashes are skipped.
239 * For example, consider the trie containing only [refs,
240 * refs/worktree] (both with values).
242 * | key | unmatched | val from node | return value |
243 * |-----------------|------------|---------------|--------------|
244 * | a | not called | n/a | -1 |
245 * | refs | \0 | refs | as per fn |
246 * | refs/ | / | refs | as per fn |
247 * | refs/w | /w | refs | as per fn |
248 * | refs/worktree | \0 | refs/worktree | as per fn |
249 * | refs/worktree/ | / | refs/worktree | as per fn |
250 * | refs/worktree/a | /a | refs/worktree | as per fn |
251 * |-----------------|------------|---------------|--------------|
254 static int trie_find(struct trie
*root
, const char *key
, match_fn fn
,
262 /* we have reached the end of the key */
263 if (root
->value
&& !root
->len
)
264 return fn(key
, root
->value
, baton
);
269 for (i
= 0; i
< root
->len
; i
++) {
270 /* Partial path normalization: skip consecutive slashes. */
271 if (key
[i
] == '/' && key
[i
+1] == '/') {
275 if (root
->contents
[i
] != key
[i
])
279 /* Matched the entire compressed section */
283 return fn(key
, root
->value
, baton
);
285 /* Partial path normalization: skip consecutive slashes */
286 while (key
[0] == '/' && key
[1] == '/')
289 child
= root
->children
[(unsigned char)*key
];
291 result
= trie_find(child
, key
+ 1, fn
, baton
);
295 if (result
>= 0 || (*key
!= '/' && *key
!= 0))
298 return fn(key
, root
->value
, baton
);
303 static struct trie common_trie
;
304 static int common_trie_done_setup
;
306 static void init_common_trie(void)
308 struct common_dir
*p
;
310 if (common_trie_done_setup
)
313 for (p
= common_list
; p
->dirname
; p
++)
314 add_to_trie(&common_trie
, p
->dirname
, p
);
316 common_trie_done_setup
= 1;
320 * Helper function for update_common_dir: returns 1 if the dir
323 static int check_common(const char *unmatched
, void *value
, void *baton
)
325 struct common_dir
*dir
= value
;
330 if (dir
->is_dir
&& (unmatched
[0] == 0 || unmatched
[0] == '/'))
331 return !dir
->exclude
;
333 if (!dir
->is_dir
&& unmatched
[0] == 0)
334 return !dir
->exclude
;
339 static void update_common_dir(struct strbuf
*buf
, int git_dir_len
,
340 const char *common_dir
)
342 char *base
= buf
->buf
+ git_dir_len
;
345 common_dir
= get_git_common_dir();
346 if (trie_find(&common_trie
, base
, check_common
, NULL
) > 0)
347 replace_dir(buf
, git_dir_len
, common_dir
);
350 void report_linked_checkout_garbage(void)
352 struct strbuf sb
= STRBUF_INIT
;
353 const struct common_dir
*p
;
356 if (!git_common_dir_env
)
358 strbuf_addf(&sb
, "%s/", get_git_dir());
360 for (p
= common_list
; p
->dirname
; p
++) {
361 const char *path
= p
->dirname
;
362 if (p
->ignore_garbage
)
364 strbuf_setlen(&sb
, len
);
365 strbuf_addstr(&sb
, path
);
366 if (file_exists(sb
.buf
))
367 report_garbage(PACKDIR_FILE_GARBAGE
, sb
.buf
);
372 static void adjust_git_path(struct strbuf
*buf
, int git_dir_len
)
374 const char *base
= buf
->buf
+ git_dir_len
;
375 if (git_graft_env
&& is_dir_file(base
, "info", "grafts"))
376 strbuf_splice(buf
, 0, buf
->len
,
377 get_graft_file(), strlen(get_graft_file()));
378 else if (git_index_env
&& !strcmp(base
, "index"))
379 strbuf_splice(buf
, 0, buf
->len
,
380 get_index_file(), strlen(get_index_file()));
381 else if (git_db_env
&& dir_prefix(base
, "objects"))
382 replace_dir(buf
, git_dir_len
+ 7, get_object_directory());
383 else if (git_hooks_path
&& dir_prefix(base
, "hooks"))
384 replace_dir(buf
, git_dir_len
+ 5, git_hooks_path
);
385 else if (git_common_dir_env
)
386 update_common_dir(buf
, git_dir_len
, NULL
);
389 static void do_git_path(const struct worktree
*wt
, struct strbuf
*buf
,
390 const char *fmt
, va_list args
)
393 strbuf_addstr(buf
, get_worktree_git_dir(wt
));
394 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
395 strbuf_addch(buf
, '/');
396 gitdir_len
= buf
->len
;
397 strbuf_vaddf(buf
, fmt
, args
);
398 adjust_git_path(buf
, gitdir_len
);
399 strbuf_cleanup_path(buf
);
402 char *git_path_buf(struct strbuf
*buf
, const char *fmt
, ...)
407 do_git_path(NULL
, buf
, fmt
, args
);
412 void strbuf_git_path(struct strbuf
*sb
, const char *fmt
, ...)
416 do_git_path(NULL
, sb
, fmt
, args
);
420 const char *git_path(const char *fmt
, ...)
422 struct strbuf
*pathname
= get_pathname();
425 do_git_path(NULL
, pathname
, fmt
, args
);
427 return pathname
->buf
;
430 char *git_pathdup(const char *fmt
, ...)
432 struct strbuf path
= STRBUF_INIT
;
435 do_git_path(NULL
, &path
, fmt
, args
);
437 return strbuf_detach(&path
, NULL
);
440 char *mkpathdup(const char *fmt
, ...)
442 struct strbuf sb
= STRBUF_INIT
;
445 strbuf_vaddf(&sb
, fmt
, args
);
447 strbuf_cleanup_path(&sb
);
448 return strbuf_detach(&sb
, NULL
);
451 const char *mkpath(const char *fmt
, ...)
454 struct strbuf
*pathname
= get_pathname();
456 strbuf_vaddf(pathname
, fmt
, args
);
458 return cleanup_path(pathname
->buf
);
461 const char *worktree_git_path(const struct worktree
*wt
, const char *fmt
, ...)
463 struct strbuf
*pathname
= get_pathname();
466 do_git_path(wt
, pathname
, fmt
, args
);
468 return pathname
->buf
;
471 static void do_submodule_path(struct strbuf
*buf
, const char *path
,
472 const char *fmt
, va_list args
)
475 struct strbuf git_submodule_common_dir
= STRBUF_INIT
;
476 struct strbuf git_submodule_dir
= STRBUF_INIT
;
478 strbuf_addstr(buf
, path
);
479 strbuf_complete(buf
, '/');
480 strbuf_addstr(buf
, ".git");
482 git_dir
= read_gitfile(buf
->buf
);
485 strbuf_addstr(buf
, git_dir
);
487 strbuf_addch(buf
, '/');
488 strbuf_addbuf(&git_submodule_dir
, buf
);
490 strbuf_vaddf(buf
, fmt
, args
);
492 if (get_common_dir_noenv(&git_submodule_common_dir
, git_submodule_dir
.buf
))
493 update_common_dir(buf
, git_submodule_dir
.len
, git_submodule_common_dir
.buf
);
495 strbuf_cleanup_path(buf
);
497 strbuf_release(&git_submodule_dir
);
498 strbuf_release(&git_submodule_common_dir
);
501 char *git_pathdup_submodule(const char *path
, const char *fmt
, ...)
504 struct strbuf buf
= STRBUF_INIT
;
506 do_submodule_path(&buf
, path
, fmt
, args
);
508 return strbuf_detach(&buf
, NULL
);
511 void strbuf_git_path_submodule(struct strbuf
*buf
, const char *path
,
512 const char *fmt
, ...)
516 do_submodule_path(buf
, path
, fmt
, args
);
520 static void do_git_common_path(struct strbuf
*buf
,
524 strbuf_addstr(buf
, get_git_common_dir());
525 if (buf
->len
&& !is_dir_sep(buf
->buf
[buf
->len
- 1]))
526 strbuf_addch(buf
, '/');
527 strbuf_vaddf(buf
, fmt
, args
);
528 strbuf_cleanup_path(buf
);
531 const char *git_common_path(const char *fmt
, ...)
533 struct strbuf
*pathname
= get_pathname();
536 do_git_common_path(pathname
, fmt
, args
);
538 return pathname
->buf
;
541 void strbuf_git_common_path(struct strbuf
*sb
, const char *fmt
, ...)
545 do_git_common_path(sb
, fmt
, args
);
549 int validate_headref(const char *path
)
552 char *buf
, buffer
[256];
553 unsigned char sha1
[20];
557 if (lstat(path
, &st
) < 0)
560 /* Make sure it is a "refs/.." symlink */
561 if (S_ISLNK(st
.st_mode
)) {
562 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
563 if (len
>= 5 && !memcmp("refs/", buffer
, 5))
569 * Anything else, just open it and try to see if it is a symbolic ref.
571 fd
= open(path
, O_RDONLY
);
574 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
578 * Is it a symbolic ref?
582 if (!memcmp("ref:", buffer
, 4)) {
585 while (len
&& isspace(*buf
))
587 if (len
>= 5 && !memcmp("refs/", buf
, 5))
592 * Is this a detached HEAD?
594 if (!get_sha1_hex(buffer
, sha1
))
600 static struct passwd
*getpw_str(const char *username
, size_t len
)
603 char *username_z
= xmemdupz(username
, len
);
604 pw
= getpwnam(username_z
);
610 * Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
611 * then it is a newly allocated string. Returns NULL on getpw failure or
614 char *expand_user_path(const char *path
)
616 struct strbuf user_path
= STRBUF_INIT
;
617 const char *to_copy
= path
;
621 if (path
[0] == '~') {
622 const char *first_slash
= strchrnul(path
, '/');
623 const char *username
= path
+ 1;
624 size_t username_len
= first_slash
- username
;
625 if (username_len
== 0) {
626 const char *home
= getenv("HOME");
629 strbuf_addstr(&user_path
, home
);
630 #ifdef GIT_WINDOWS_NATIVE
631 convert_slashes(user_path
.buf
);
634 struct passwd
*pw
= getpw_str(username
, username_len
);
637 strbuf_addstr(&user_path
, pw
->pw_dir
);
639 to_copy
= first_slash
;
641 strbuf_addstr(&user_path
, to_copy
);
642 return strbuf_detach(&user_path
, NULL
);
644 strbuf_release(&user_path
);
649 * First, one directory to try is determined by the following algorithm.
651 * (0) If "strict" is given, the path is used as given and no DWIM is
653 * (1) "~/path" to mean path under the running user's home directory;
654 * (2) "~user/path" to mean path under named user's home directory;
655 * (3) "relative/path" to mean cwd relative directory; or
656 * (4) "/absolute/path" to mean absolute directory.
658 * Unless "strict" is given, we check "%s/.git", "%s", "%s.git/.git", "%s.git"
659 * in this order. We select the first one that is a valid git repository, and
660 * chdir() to it. If none match, or we fail to chdir, we return NULL.
662 * If all goes well, we return the directory we used to chdir() (but
663 * before ~user is expanded), avoiding getcwd() resolving symbolic
664 * links. User relative paths are also returned as they are given,
665 * except DWIM suffixing.
667 const char *enter_repo(const char *path
, int strict
)
669 static struct strbuf validated_path
= STRBUF_INIT
;
670 static struct strbuf used_path
= STRBUF_INIT
;
676 static const char *suffix
[] = {
677 "/.git", "", ".git/.git", ".git", NULL
,
680 int len
= strlen(path
);
682 while ((1 < len
) && (path
[len
-1] == '/'))
686 * We can handle arbitrary-sized buffers, but this remains as a
687 * sanity check on untrusted input.
692 strbuf_reset(&used_path
);
693 strbuf_reset(&validated_path
);
694 strbuf_add(&used_path
, path
, len
);
695 strbuf_add(&validated_path
, path
, len
);
697 if (used_path
.buf
[0] == '~') {
698 char *newpath
= expand_user_path(used_path
.buf
);
701 strbuf_attach(&used_path
, newpath
, strlen(newpath
),
704 for (i
= 0; suffix
[i
]; i
++) {
706 size_t baselen
= used_path
.len
;
707 strbuf_addstr(&used_path
, suffix
[i
]);
708 if (!stat(used_path
.buf
, &st
) &&
709 (S_ISREG(st
.st_mode
) ||
710 (S_ISDIR(st
.st_mode
) && is_git_directory(used_path
.buf
)))) {
711 strbuf_addstr(&validated_path
, suffix
[i
]);
714 strbuf_setlen(&used_path
, baselen
);
718 gitfile
= read_gitfile(used_path
.buf
);
720 strbuf_reset(&used_path
);
721 strbuf_addstr(&used_path
, gitfile
);
723 if (chdir(used_path
.buf
))
725 path
= validated_path
.buf
;
728 const char *gitfile
= read_gitfile(path
);
735 if (is_git_directory(".")) {
737 check_repository_format();
744 static int calc_shared_perm(int mode
)
748 if (get_shared_repository() < 0)
749 tweak
= -get_shared_repository();
751 tweak
= get_shared_repository();
753 if (!(mode
& S_IWUSR
))
756 /* Copy read bits to execute bits */
757 tweak
|= (tweak
& 0444) >> 2;
758 if (get_shared_repository() < 0)
759 mode
= (mode
& ~0777) | tweak
;
767 int adjust_shared_perm(const char *path
)
769 int old_mode
, new_mode
;
771 if (!get_shared_repository())
773 if (get_st_mode_bits(path
, &old_mode
) < 0)
776 new_mode
= calc_shared_perm(old_mode
);
777 if (S_ISDIR(old_mode
)) {
778 /* Copy read bits to execute bits */
779 new_mode
|= (new_mode
& 0444) >> 2;
780 new_mode
|= FORCE_DIR_SET_GID
;
783 if (((old_mode
^ new_mode
) & ~S_IFMT
) &&
784 chmod(path
, (new_mode
& ~S_IFMT
)) < 0)
789 void safe_create_dir(const char *dir
, int share
)
791 if (mkdir(dir
, 0777) < 0) {
792 if (errno
!= EEXIST
) {
797 else if (share
&& adjust_shared_perm(dir
))
798 die(_("Could not make %s writable by group"), dir
);
801 static int have_same_root(const char *path1
, const char *path2
)
803 int is_abs1
, is_abs2
;
805 is_abs1
= is_absolute_path(path1
);
806 is_abs2
= is_absolute_path(path2
);
807 return (is_abs1
&& is_abs2
&& tolower(path1
[0]) == tolower(path2
[0])) ||
808 (!is_abs1
&& !is_abs2
);
812 * Give path as relative to prefix.
814 * The strbuf may or may not be used, so do not assume it contains the
817 const char *relative_path(const char *in
, const char *prefix
,
820 int in_len
= in
? strlen(in
) : 0;
821 int prefix_len
= prefix
? strlen(prefix
) : 0;
828 else if (!prefix_len
)
831 if (have_same_root(in
, prefix
))
832 /* bypass dos_drive, for "c:" is identical to "C:" */
833 i
= j
= has_dos_drive_prefix(in
);
838 while (i
< prefix_len
&& j
< in_len
&& prefix
[i
] == in
[j
]) {
839 if (is_dir_sep(prefix
[i
])) {
840 while (is_dir_sep(prefix
[i
]))
842 while (is_dir_sep(in
[j
]))
853 /* "prefix" seems like prefix of "in" */
856 * but "/foo" is not a prefix of "/foobar"
857 * (i.e. prefix not end with '/')
859 prefix_off
< prefix_len
) {
861 /* in="/a/b", prefix="/a/b" */
863 } else if (is_dir_sep(in
[j
])) {
864 /* in="/a/b/c", prefix="/a/b" */
865 while (is_dir_sep(in
[j
]))
869 /* in="/a/bbb/c", prefix="/a/b" */
873 /* "in" is short than "prefix" */
875 /* "in" not end with '/' */
877 if (is_dir_sep(prefix
[i
])) {
878 /* in="/a/b", prefix="/a/b/c/" */
879 while (is_dir_sep(prefix
[i
]))
887 if (i
>= prefix_len
) {
895 strbuf_grow(sb
, in_len
);
897 while (i
< prefix_len
) {
898 if (is_dir_sep(prefix
[i
])) {
899 strbuf_addstr(sb
, "../");
900 while (is_dir_sep(prefix
[i
]))
906 if (!is_dir_sep(prefix
[prefix_len
- 1]))
907 strbuf_addstr(sb
, "../");
909 strbuf_addstr(sb
, in
);
915 * A simpler implementation of relative_path
917 * Get relative path by removing "prefix" from "in". This function
918 * first appears in v1.5.6-1-g044bbbc, and makes git_dir shorter
919 * to increase performance when traversing the path to work_tree.
921 const char *remove_leading_path(const char *in
, const char *prefix
)
923 static struct strbuf buf
= STRBUF_INIT
;
926 if (!prefix
|| !prefix
[0])
929 if (is_dir_sep(prefix
[i
])) {
930 if (!is_dir_sep(in
[j
]))
932 while (is_dir_sep(prefix
[i
]))
934 while (is_dir_sep(in
[j
]))
937 } else if (in
[j
] != prefix
[i
]) {
944 /* "/foo" is a prefix of "/foo" */
946 /* "/foo" is not a prefix of "/foobar" */
947 !is_dir_sep(prefix
[i
-1]) && !is_dir_sep(in
[j
])
950 while (is_dir_sep(in
[j
]))
955 strbuf_addstr(&buf
, ".");
957 strbuf_addstr(&buf
, in
+ j
);
962 * It is okay if dst == src, but they should not overlap otherwise.
964 * Performs the following normalizations on src, storing the result in dst:
965 * - Ensures that components are separated by '/' (Windows only)
966 * - Squashes sequences of '/'.
967 * - Removes "." components.
968 * - Removes ".." components, and the components the precede them.
969 * Returns failure (non-zero) if a ".." component appears as first path
970 * component anytime during the normalization. Otherwise, returns success (0).
972 * Note that this function is purely textual. It does not follow symlinks,
973 * verify the existence of the path, or make any system calls.
975 * prefix_len != NULL is for a specific case of prefix_pathspec():
976 * assume that src == dst and src[0..prefix_len-1] is already
977 * normalized, any time "../" eats up to the prefix_len part,
978 * prefix_len is reduced. In the end prefix_len is the remaining
979 * prefix that has not been overridden by user pathspec.
981 * NEEDSWORK: This function doesn't perform normalization w.r.t. trailing '/'.
982 * For everything but the root folder itself, the normalized path should not
983 * end with a '/', then the callers need to be fixed up accordingly.
986 int normalize_path_copy_len(char *dst
, const char *src
, int *prefix_len
)
991 for (i
= has_dos_drive_prefix(src
); i
> 0; i
--)
995 if (is_dir_sep(*src
)) {
997 while (is_dir_sep(*src
))
1005 * A path component that begins with . could be
1007 * (1) "." and ends -- ignore and terminate.
1008 * (2) "./" -- ignore them, eat slash and continue.
1009 * (3) ".." and ends -- strip one and terminate.
1010 * (4) "../" -- strip one, eat slash and continue.
1016 } else if (is_dir_sep(src
[1])) {
1019 while (is_dir_sep(*src
))
1022 } else if (src
[1] == '.') {
1027 } else if (is_dir_sep(src
[2])) {
1030 while (is_dir_sep(*src
))
1037 /* copy up to the next '/', and eat all '/' */
1038 while ((c
= *src
++) != '\0' && !is_dir_sep(c
))
1040 if (is_dir_sep(c
)) {
1042 while (is_dir_sep(c
))
1051 * dst0..dst is prefix portion, and dst[-1] is '/';
1054 dst
--; /* go to trailing '/' */
1057 /* Windows: dst[-1] cannot be backslash anymore */
1058 while (dst0
< dst
&& dst
[-1] != '/')
1060 if (prefix_len
&& *prefix_len
> dst
- dst0
)
1061 *prefix_len
= dst
- dst0
;
1067 int normalize_path_copy(char *dst
, const char *src
)
1069 return normalize_path_copy_len(dst
, src
, NULL
);
1073 * path = Canonical absolute path
1074 * prefixes = string_list containing normalized, absolute paths without
1075 * trailing slashes (except for the root directory, which is denoted by "/").
1077 * Determines, for each path in prefixes, whether the "prefix"
1078 * is an ancestor directory of path. Returns the length of the longest
1079 * ancestor directory, excluding any trailing slashes, or -1 if no prefix
1080 * is an ancestor. (Note that this means 0 is returned if prefixes is
1081 * ["/"].) "/foo" is not considered an ancestor of "/foobar". Directories
1082 * are not considered to be their own ancestors. path must be in a
1083 * canonical form: empty components, or "." or ".." components are not
1086 int longest_ancestor_length(const char *path
, struct string_list
*prefixes
)
1088 int i
, max_len
= -1;
1090 if (!strcmp(path
, "/"))
1093 for (i
= 0; i
< prefixes
->nr
; i
++) {
1094 const char *ceil
= prefixes
->items
[i
].string
;
1095 int len
= strlen(ceil
);
1097 if (len
== 1 && ceil
[0] == '/')
1098 len
= 0; /* root matches anything, with length 0 */
1099 else if (!strncmp(path
, ceil
, len
) && path
[len
] == '/')
1100 ; /* match of length len */
1102 continue; /* no match */
1111 /* strip arbitrary amount of directory separators at end of path */
1112 static inline int chomp_trailing_dir_sep(const char *path
, int len
)
1114 while (len
&& is_dir_sep(path
[len
- 1]))
1120 * If path ends with suffix (complete path components), returns the
1121 * part before suffix (sans trailing directory separators).
1122 * Otherwise returns NULL.
1124 char *strip_path_suffix(const char *path
, const char *suffix
)
1126 int path_len
= strlen(path
), suffix_len
= strlen(suffix
);
1128 while (suffix_len
) {
1132 if (is_dir_sep(path
[path_len
- 1])) {
1133 if (!is_dir_sep(suffix
[suffix_len
- 1]))
1135 path_len
= chomp_trailing_dir_sep(path
, path_len
);
1136 suffix_len
= chomp_trailing_dir_sep(suffix
, suffix_len
);
1138 else if (path
[--path_len
] != suffix
[--suffix_len
])
1142 if (path_len
&& !is_dir_sep(path
[path_len
- 1]))
1144 return xstrndup(path
, chomp_trailing_dir_sep(path
, path_len
));
1147 int daemon_avoid_alias(const char *p
)
1152 * This resurrects the belts and suspenders paranoia check by HPA
1153 * done in <435560F7.4080006@zytor.com> thread, now enter_repo()
1154 * does not do getcwd() based path canonicalization.
1156 * sl becomes true immediately after seeing '/' and continues to
1157 * be true as long as dots continue after that without intervening
1158 * non-dot character.
1160 if (!p
|| (*p
!= '/' && *p
!= '~'))
1170 else if (ch
== '/') {
1172 /* reject //, /./ and /../ */
1177 if (0 < ndot
&& ndot
< 3)
1178 /* reject /.$ and /..$ */
1187 else if (ch
== '/') {
1194 static int only_spaces_and_periods(const char *path
, size_t len
, size_t skip
)
1202 if (c
!= ' ' && c
!= '.')
1208 int is_ntfs_dotgit(const char *name
)
1212 for (len
= 0; ; len
++)
1213 if (!name
[len
] || name
[len
] == '\\' || is_dir_sep(name
[len
])) {
1214 if (only_spaces_and_periods(name
, len
, 4) &&
1215 !strncasecmp(name
, ".git", 4))
1217 if (only_spaces_and_periods(name
, len
, 5) &&
1218 !strncasecmp(name
, "git~1", 5))
1220 if (name
[len
] != '\\')
1227 char *xdg_config_home(const char *filename
)
1229 const char *home
, *config_home
;
1232 config_home
= getenv("XDG_CONFIG_HOME");
1233 if (config_home
&& *config_home
)
1234 return mkpathdup("%s/git/%s", config_home
, filename
);
1236 home
= getenv("HOME");
1238 return mkpathdup("%s/.config/git/%s", home
, filename
);
1242 GIT_PATH_FUNC(git_path_cherry_pick_head
, "CHERRY_PICK_HEAD")
1243 GIT_PATH_FUNC(git_path_revert_head
, "REVERT_HEAD")
1244 GIT_PATH_FUNC(git_path_squash_msg
, "SQUASH_MSG")
1245 GIT_PATH_FUNC(git_path_merge_msg
, "MERGE_MSG")
1246 GIT_PATH_FUNC(git_path_merge_rr
, "MERGE_RR")
1247 GIT_PATH_FUNC(git_path_merge_mode
, "MERGE_MODE")
1248 GIT_PATH_FUNC(git_path_merge_head
, "MERGE_HEAD")
1249 GIT_PATH_FUNC(git_path_fetch_head
, "FETCH_HEAD")
1250 GIT_PATH_FUNC(git_path_shallow
, "shallow")