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use std::ffi::OsString;
use std::fmt;
use std::sync::Arc;
use crate::fs::{FileType, Metadata};
use crate::io;
use crate::path::PathBuf;
use crate::task::spawn_blocking;
/// An entry in a directory.
///
/// A stream of entries in a directory is returned by [`read_dir`].
///
/// This type is an async version of [`std::fs::DirEntry`].
///
/// [`read_dir`]: fn.read_dir.html
/// [`std::fs::DirEntry`]: https://doc.rust-lang.org/std/fs/struct.DirEntry.html
pub struct DirEntry(Arc<std::fs::DirEntry>);
impl DirEntry {
/// Creates an asynchronous `DirEntry` from a synchronous one.
pub(crate) fn new(inner: std::fs::DirEntry) -> DirEntry {
DirEntry(Arc::new(inner))
}
/// Returns the full path to this entry.
///
/// The full path is created by joining the original path passed to [`read_dir`] with the name
/// of this entry.
///
/// [`read_dir`]: fn.read_dir.html
///
/// # Examples
///
/// ```no_run
/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
/// #
/// use async_std::fs;
/// use async_std::prelude::*;
///
/// let mut dir = fs::read_dir(".").await?;
///
/// while let Some(res) = dir.next().await {
/// let entry = res?;
/// println!("{:?}", entry.path());
/// }
/// #
/// # Ok(()) }) }
/// ```
pub fn path(&self) -> PathBuf {
self.0.path().into()
}
/// Reads the metadata for this entry.
///
/// This function will traverse symbolic links to read the metadata.
///
/// If you want to read metadata without following symbolic links, use [`symlink_metadata`]
/// instead.
///
/// [`symlink_metadata`]: fn.symlink_metadata.html
///
/// # Errors
///
/// An error will be returned in the following situations:
///
/// * This entry does not point to an existing file or directory anymore.
/// * The current process lacks permissions to read the metadata.
/// * Some other I/O error occurred.
///
/// # Examples
///
/// ```no_run
/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
/// #
/// use async_std::fs;
/// use async_std::prelude::*;
///
/// let mut dir = fs::read_dir(".").await?;
///
/// while let Some(res) = dir.next().await {
/// let entry = res?;
/// println!("{:?}", entry.metadata().await?);
/// }
/// #
/// # Ok(()) }) }
/// ```
pub async fn metadata(&self) -> io::Result<Metadata> {
let inner = self.0.clone();
spawn_blocking(move || inner.metadata()).await
}
/// Reads the file type for this entry.
///
/// This function will not traverse symbolic links if this entry points at one.
///
/// If you want to read metadata with following symbolic links, use [`metadata`] instead.
///
/// [`metadata`]: #method.metadata
///
/// # Errors
///
/// An error will be returned in the following situations:
///
/// * This entry does not point to an existing file or directory anymore.
/// * The current process lacks permissions to read this entry's metadata.
/// * Some other I/O error occurred.
///
/// # Examples
///
/// ```no_run
/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
/// #
/// use async_std::fs;
/// use async_std::prelude::*;
///
/// let mut dir = fs::read_dir(".").await?;
///
/// while let Some(res) = dir.next().await {
/// let entry = res?;
/// println!("{:?}", entry.file_type().await?);
/// }
/// #
/// # Ok(()) }) }
/// ```
pub async fn file_type(&self) -> io::Result<FileType> {
let inner = self.0.clone();
spawn_blocking(move || inner.file_type()).await
}
/// Returns the bare name of this entry without the leading path.
///
/// # Examples
///
/// ```no_run
/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
/// #
/// use async_std::fs;
/// use async_std::prelude::*;
///
/// let mut dir = fs::read_dir(".").await?;
///
/// while let Some(res) = dir.next().await {
/// let entry = res?;
/// println!("{}", entry.file_name().to_string_lossy());
/// }
/// #
/// # Ok(()) }) }
/// ```
pub fn file_name(&self) -> OsString {
self.0.file_name()
}
}
impl fmt::Debug for DirEntry {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_tuple("DirEntry").field(&self.path()).finish()
}
}
cfg_unix! {
use crate::os::unix::fs::DirEntryExt;
impl DirEntryExt for DirEntry {
fn ino(&self) -> u64 {
self.0.ino()
}
}
}