diff options
| -rw-r--r-- | dir.c | 38 | ||||
| -rw-r--r-- | dir.h | 3 |
2 files changed, 41 insertions, 0 deletions
@@ -642,3 +642,41 @@ file_exists(const char *f) struct stat sb; return stat(f, &sb) == 0; } + +/* + * get_relative_cwd() gets the prefix of the current working directory + * relative to 'dir'. If we are not inside 'dir', it returns NULL. + * As a convenience, it also returns NULL if 'dir' is already NULL. + */ +char *get_relative_cwd(char *buffer, int size, const char *dir) +{ + char *cwd = buffer; + + /* + * a lazy caller can pass a NULL returned from get_git_work_tree() + * and rely on this function to return NULL. + */ + if (!dir) + return NULL; + if (!getcwd(buffer, size)) + die("can't find the current directory: %s", strerror(errno)); + + if (!is_absolute_path(dir)) + dir = make_absolute_path(dir); + + while (*dir && *dir == *cwd) { + dir++; + cwd++; + } + if (*dir) + return NULL; + if (*cwd == '/') + return cwd + 1; + return cwd; +} + +int is_inside_dir(const char *dir) +{ + char buffer[PATH_MAX]; + return get_relative_cwd(buffer, sizeof(buffer), dir) != NULL; +} @@ -61,4 +61,7 @@ extern void add_exclude(const char *string, const char *base, extern int file_exists(const char *); extern struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len); +extern char *get_relative_cwd(char *buffer, int size, const char *dir); +extern int is_inside_dir(const char *dir); + #endif |