use std::{io, io::ErrorKind::AlreadyExists, path::Path}; #[cfg(not(windows))]pub fn create_symlink(original: &Path, link: &Path) -> io::Result<()> {    std::os::unix::fs::symlink(original, link)} #[cfg(not(windows))]pub fn remove_symlink(path: &Path) -> io::Result<()> {    std::fs::remove_file(path)} // TODO: use the `symlink` crate once it can delete directory symlinks#[cfg(windows)]pub fn remove_symlink(path: &Path) -> io::Result<()> {    if let Ok(meta) = std::fs::metadata(path) {        if meta.is_file() {            std::fs::remove_file(path) // this removes the link itself        } else {            std::fs::remove_dir(path) // however, this sees the destination directory, which isn't the right thing actually        }    } else {        std::fs::remove_file(path).or_else(|_| std::fs::remove_dir(path))    }} #[cfg(windows)]pub fn create_symlink(original: &Path, link: &Path) -> io::Result<()> {    use std::os::windows::fs::{symlink_dir, symlink_file};    // TODO: figure out if links to links count as files or whatever they point at    if std::fs::metadata(link.parent().expect("dir for link").join(original))?.is_dir() {        symlink_dir(original, link)    } else {        symlink_file(original, link)    }} #[cfg(not(windows))]pub fn indicates_collision(err: &std::io::Error) -> bool {    // TODO: use ::IsDirectory as well when stabilized instead of raw_os_error(), and ::FileSystemLoop respectively    err.kind() == AlreadyExists        || err.raw_os_error() == Some(21)        || err.raw_os_error() == Some(62) // no-follow on symlnk on mac-os        || err.raw_os_error() == Some(40) // no-follow on symlnk on ubuntu} #[cfg(windows)]pub fn indicates_collision(err: &std::io::Error) -> bool {    err.kind() == AlreadyExists || err.kind() == std::io::ErrorKind::PermissionDenied}