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Path methods — symlinks improvement #85747

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Jun 18, 2021
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24 changes: 24 additions & 0 deletions library/std/src/fs.rs
Original file line number Diff line number Diff line change
Expand Up @@ -1007,6 +1007,30 @@ impl Metadata {
self.file_type().is_file()
}

/// Returns `true` if this metadata is for a symbolic link file.
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///
/// # Examples
///
/// ```no_run
/// use std::fs;
/// use std::path::Path;
/// use std::os::unix::fs::symlink;
///
/// fn main() -> std::io::Result<()> {
/// let link_path = Path::new("/link");
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/// symlink("/origin_does_not_exists/", link_path)?;
///
/// let metadata = fs::symlink_metadata(link_path)?;
///
/// assert!(metadata.is_symlink());
/// Ok(())
/// }
/// ```
#[unstable(feature = "is_symlink", issue = "85748")]
pub fn is_symlink(&self) -> bool {
self.file_type().is_symlink()
}

/// Returns the size of the file, in bytes, this metadata is for.
///
/// # Examples
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25 changes: 25 additions & 0 deletions library/std/src/path.rs
Original file line number Diff line number Diff line change
Expand Up @@ -2568,6 +2568,31 @@ impl Path {
fs::metadata(self).map(|m| m.is_dir()).unwrap_or(false)
}

/// Returns true if the path exists on disk and is pointing at a symbolic link file.
/// This method can alse be used to check whether symlink exists.
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///
/// This function will not traverse symbolic links.
/// In case of broken symbolic links this will also return true.
///
/// If you cannot access the directory containing the file, e.g., because of a
/// permission error, this will return false.
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///
/// # Examples
///
/// ```no_run
/// use std::path::Path;
/// use std::os::unix::fs::symlink;
///
/// let link_path = Path::new("/link");
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/// symlink("/origin_does_not_exists/", link_path)?;
/// assert_eq!(link_path.is_symlink(), true);
/// assert_eq!(link_path.exists(), false);
/// ```
#[unstable(feature = "is_symlink", issue = "85748")]
pub fn is_symlink(&self) -> bool {
fs::symlink_metadata(self).map(|m| m.is_symlink()).unwrap_or(false)
}

/// Converts a [`Box<Path>`](Box) into a [`PathBuf`] without copying or
/// allocating.
#[stable(feature = "into_boxed_path", since = "1.20.0")]
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