英文:
creating and removing symlinks
问题
嗨，我正在尝试在Rust中创建符号链接到目录，然后尝试取消链接它。我正在寻找一个跨平台的方法来实现这个目标。
我尝试使用symlink crate来完成这个任务。在Unix系统中，该crate使用fs::remove_file来删除符号链接。但实际使用时会抛出错误。错误消息是 path is a Directory。我还在fnm（这里）中看到了相同的函数被使用。我不知道该怎么办。
至于创建符号链接，该crate使用std::os::unix::fs::symlink。但出于某种原因，我的符号链接目录仍然为空。总体的代码大致如下：
use std::path::Path;
#[cfg(unix)]
pub fn symlink_dir<P: AsRef<Path>, U: AsRef<Path>>(from: P, to: U) -> std::io::Result<()> {
std::os::unix::fs::symlink(from, to)?;
Ok(())
}
#[cfg(windows)]
pub fn symlink_dir<P: AsRef<Path>, U: AsRef<Path>>(from: P, to: U) -> std::io::Result<()> {
junction::create(from, to)?;
Ok(())
}
#[cfg(windows)]
pub fn remove_symlink_dir<P: AsRef<Path>>(path: P) -> std::io::Result<()> {
std::fs::remove_dir(path)?;
Ok(())
}
#[cfg(unix)]
pub fn remove_symlink_dir<P: AsRef<Path>>(path: P) -> std::io::Result<()> {
std::fs::remove_file(path)?;
Ok(())
}
我还没有在Windows上尝试过，所以不确定Windows部分是否正常工作。只在Linux操作系统上使用GitHub Codespaces进行了尝试。
我正在尝试创建一个类似于nvm的Dart版本管理器（这里），我需要将当前使用的版本的目录创建符号链接到一个名为current或类似的目录中。
英文:
Hi im trying to symlink a directory in rust and later tried unlinking it. Im looking for a cross-platform method to do this.
Ive tried using the symlink crate to do this. In unix systems, the crate uses fs::remove_file for removing symlinks. But this throws an error when actually using it. The error returns path is a Directory. I also saw the same function being used in fnm (here). Idk what im supposed to do.
As for creating symlinks, the crate uses std::os::unix::fs::symlink for creating the symlink, but for some reason my symlinked dir remains empty. The overall code used is more or less the following:
use std::path::Path;
#[cfg(unix)]
pub fn symlink_dir<P: AsRef<Path>, U: AsRef<Path>>(from: P, to: U) -> std::io::Result<()> {
std::os::unix::fs::symlink(from, to)?;
Ok(())
}
#[cfg(windows)]
pub fn symlink_dir<P: AsRef<Path>, U: AsRef<Path>>(from: P, to: U) -> std::io::Result<()> {
junction::create(from, to)?;
Ok(())
}
#[cfg(windows)]
pub fn remove_symlink_dir<P: AsRef<Path>>(path: P) -> std::io::Result<()> {
std::fs::remove_dir(path)?;
Ok(())
}
#[cfg(unix)]
pub fn remove_symlink_dir<P: AsRef<Path>>(path: P) -> std::io::Result<()> {
std::fs::remove_file(path)?;
Ok(())
}
Still haven't tried it on windows so not sure wether the windows counter part works. Only tried it on a linux os using github codespaces.
Im trying to make a nvm like version manager for Dart (here) and i need to symlink the currently used version's directory to a current dir or something similar.
答案1
得分: 0
Rust文档中对于 std::fs::remove_file 的说明称它对应于Unix上的 unlink 系统调用，而Unix上关于 unlink 的文档则说明 如果名称指向符号链接，则会删除该链接。因此，使用 std::fs::remove_file 删除符号链接（以及 symlink::remove_symlink_dir）应该是有效的。
看起来，结尾带斜杠可能会导致你提到的错误。例如，在 /path/to/my/symlink 上调用 unlink 应该可以工作，但在 /path/to/my/symlink/ 上不行。
英文:
Rust documentation for std::fs::remove_file says that it corresponds to the unlink syscall on Unix, and Unix documentation for unlink states If the name referred to a symbolic link, the link is removed. Therefore, it should work to use std::fs::remove_file to remove a symlink (and thereby also symlink::remove_symlink_dir)
It appears that a trailing slash can cause the error you mentioned. For example, calling unlink on /path/to/my/symlink should work, but not on /path/to/my/symlink/.
答案2
得分: 0
我还没有找到答案来回答我的问题，但最终我解决了它。不确定为什么对我来说使用 fs::remove_file 不起作用。所以我采取了强制的方法，只是使用 fs::remove_dir_all 删除了符号链接。只要它能工作，我就满意。我一直在这里使用它，运行得很好，尽管我仍然认为在Unix上使用 fs::remove_file，在Windows上使用 fs::remove_dir 应该是正确的方式。
英文:
I havent found an answer to my question but i did end up solving it. Not sure why using fs::remove_file wasnt working for me. So i brute forced it and just removed the symlink using fs::remove_dir_all. As long as it works, im good with it. I've been using it here, working fine, tho i still do think using fs::remove_file on unix and fs::remove_dir on windows should be how it is.
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