Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/vendor/tokio/src/fs/try_exists.rs b/vendor/tokio/src/fs/try_exists.rs
new file mode 100644
index 000000000..069518bf9
--- /dev/null
+++ b/vendor/tokio/src/fs/try_exists.rs
@@ -0,0 +1,34 @@
+use crate::fs::asyncify;
+
+use std::io;
+use std::path::Path;
+
+/// Returns `Ok(true)` if the path points at an existing entity.
+///
+/// This function will traverse symbolic links to query information about the
+/// destination file. In case of broken symbolic links this will return `Ok(false)`.
+///
+/// This is the async equivalent of [`std::path::Path::try_exists`][std].
+///
+/// [std]: fn@std::path::Path::try_exists
+///
+/// # Examples
+///
+/// ```no_run
+/// use tokio::fs;
+///
+/// # async fn dox() -> std::io::Result<()> {
+/// fs::try_exists("foo.txt").await?;
+/// # Ok(())
+/// # }
+/// ```
+pub async fn try_exists(path: impl AsRef<Path>) -> io::Result<bool> {
+    let path = path.as_ref().to_owned();
+    // std's Path::try_exists is not available for current Rust min supported version.
+    // Current implementation is based on its internal implementation instead.
+    match asyncify(move || std::fs::metadata(path)).await {
+        Ok(_) => Ok(true),
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound => Ok(false),
+        Err(error) => Err(error),
+    }
+}