From cdcc191c0b934cc611e7658edcac3398788028d2 Mon Sep 17 00:00:00 2001
From: Dean Li <deantvv@gmail.com>
Date: Sat, 13 Mar 2021 14:47:29 +0800
Subject: [PATCH] Use `cfg_if!` for trait FilePath

---
 vm/src/stdlib/os.rs | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/vm/src/stdlib/os.rs b/vm/src/stdlib/os.rs
index 6967913a5..644075436 100644
--- a/vm/src/stdlib/os.rs
+++ b/vm/src/stdlib/os.rs
@@ -165,18 +165,20 @@ fn make_path(vm: &VirtualMachine, path: &PyPathLike, dir_fd: &DirFd) -> PyResult
         return Ok(path.into_os_string());
     }
 
-    if cfg!(target_os = "wasi") {
-        return Err(vm.new_os_error("dir_fd not supported on wasi yet".to_owned()));
-    }
-
-    let dir_path = match rust_file(dir_fd.0.unwrap().into()).path() {
-        Ok(dir_path) => dir_path,
-        Err(_) => {
-            return Err(vm.new_os_error(format!("Cannot determine path of dir_fd: {:?}", dir_fd.0)));
+    cfg_if::cfg_if! {
+        if #[cfg(target_os = "wasi")] {
+            return Err(vm.new_os_error("dir_fd not supported on wasi yet".to_owned()));
+        } else {
+            let dir_path = match rust_file(dir_fd.0.unwrap().into()).path() {
+                Ok(dir_path) => dir_path,
+                Err(_) => {
+                    return Err(vm.new_os_error(format!("Cannot determine path of dir_fd: {:?}", dir_fd.0)));
+                }
+            };
+            let p: PathBuf = vec![dir_path, path].iter().collect();
+            Ok(p.into_os_string())
         }
-    };
-    let p: PathBuf = vec![dir_path, path].iter().collect();
-    Ok(p.into_os_string())
+    }
 }
 
 impl IntoPyException for io::Error {