From 2c9b558d14d9125534953a596e08ed4f6d33bc5d Mon Sep 17 00:00:00 2001
From: hhggit <zh.xz@outlook.com>
Date: Mon, 18 Nov 2019 10:07:47 +0800
Subject: [PATCH 1/2] add os::windows::symlink_{dir,file}

---
 src/fs/mod.rs         |  2 ++
 src/os/windows/fs.rs  | 55 +++++++++++++++++++++++++++++++++++++++++++
 src/os/windows/mod.rs |  1 +
 3 files changed, 58 insertions(+)
 create mode 100644 src/os/windows/fs.rs

diff --git a/src/fs/mod.rs b/src/fs/mod.rs
index 4598ec84..5cf086de 100644
--- a/src/fs/mod.rs
+++ b/src/fs/mod.rs
@@ -3,11 +3,13 @@
 //! This module is an async version of [`std::fs`].
 //!
 //! [`os::unix::fs`]: ../os/unix/fs/index.html
+//! [`os::windows::fs`]: ../os/windows/fs/index.html
 //! [`std::fs`]: https://doc.rust-lang.org/std/fs/index.html
 //!
 //! # Platform-specific extensions
 //!
 //! * Unix: use the [`os::unix::fs`] module.
+//! * Windows: use the [`os::windows::fs`] module.
 //!
 //! # Examples
 //!
diff --git a/src/os/windows/fs.rs b/src/os/windows/fs.rs
new file mode 100644
index 00000000..243f3819
--- /dev/null
+++ b/src/os/windows/fs.rs
@@ -0,0 +1,55 @@
+//! Windows-specific filesystem extensions.
+
+use crate::io;
+use crate::path::Path;
+use crate::task::spawn_blocking;
+
+/// Creates a new directory symbolic link on the filesystem.
+///
+/// The `dst` path will be a directory symbolic link pointing to the `src` path.
+///
+/// This function is an async version of [`std::os::windows::fs::symlink_dir`].
+///
+/// [`std::os::windows::fs::symlink_dir`]: https://doc.rust-lang.org/std/os/windows/fs/fn.symlink_dir.html
+///
+/// # Examples
+///
+/// ```no_run
+/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
+/// #
+/// use async_std::os::windows::fs::symlink_dir;
+///
+/// symlink_dir("a", "b").await?;
+/// #
+/// # Ok(()) }) }
+/// ```
+pub async fn symlink_dir<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()> {
+    let src = src.as_ref().to_owned();
+    let dst = dst.as_ref().to_owned();
+    spawn_blocking(move || std::os::windows::fs::symlink_dir(&src, &dst)).await
+}
+
+/// Creates a new file symbolic link on the filesystem.
+///
+/// The `dst` path will be a file symbolic link pointing to the `src` path.
+///
+/// This function is an async version of [`std::os::windows::fs::symlink_file`].
+///
+/// [`std::os::windows::fs::symlink_file`]: https://doc.rust-lang.org/std/os/windows/fs/fn.symlink_file.html
+///
+/// # Examples
+///
+/// ```no_run
+/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
+/// #
+/// use async_std::os::windows::fs::symlink_file;
+///
+/// symlink_file("a.txt", "b.txt").await?;
+/// #
+/// # Ok(()) }) }
+/// ```
+pub async fn symlink_file<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()> {
+    let src = src.as_ref().to_owned();
+    let dst = dst.as_ref().to_owned();
+    spawn_blocking(move || std::os::windows::fs::symlink_file(&src, &dst)).await
+}
diff --git a/src/os/windows/mod.rs b/src/os/windows/mod.rs
index f3350007..5f0bc0e4 100644
--- a/src/os/windows/mod.rs
+++ b/src/os/windows/mod.rs
@@ -2,4 +2,5 @@
 
 cfg_std! {
     pub mod io;
+    pub mod fs;
 }

From 72ed4eb4fde43ec89d7135f0d16b4df3b0d88fda Mon Sep 17 00:00:00 2001
From: hhggit <hhggit@users.noreply.github.com>
Date: Wed, 20 Nov 2019 19:51:01 +0800
Subject: [PATCH 2/2] Update mod.rs

---
 src/os/windows/mod.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/os/windows/mod.rs b/src/os/windows/mod.rs
index 5f0bc0e4..cd8deb60 100644
--- a/src/os/windows/mod.rs
+++ b/src/os/windows/mod.rs
@@ -2,5 +2,8 @@
 
 cfg_std! {
     pub mod io;
+}
+
+cfg_default! {
     pub mod fs;
 }