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e0b77a6b77
Otherwise, the behaviour can lead to unexpected results, resulting in removing an entire tree that's not necessarily under the root. Furthermore, this change is needed if are to properly handle dir symlinks on Windows. Without explicitly requiring that a directory or file is opened with `FILE_OPEN_REPARSE_POINT`, Windows automatically dereferences all symlinks along the way. This commit adds another option to `OpenDirOptions`, namely `.no_follow`, which defaults to `false` and can be used to specifically open a directory symlink on Windows or call `openat` with `O_NOFOLLOW` flag in POSIX.