Don't normalize commands

Since commands are looked up in PATH, their `Path` is unreliable and
cannot be treated as a normal directory.

Author: jyn514

src/cmd/mod.rs

@@ -381,7 +381,7 @@ impl<'w, 'pl> Command<'w, 'pl> {
                 ),
                 Binary::__NonExaustive => panic!("do not create __NonExaustive variants manually"),
             };
-            let mut cmd = AsyncCommand::new(crate::utils::normalize_path(&binary));
+            let mut cmd = AsyncCommand::new(&binary);
 
             cmd.args(&self.args);
 

tests/buildtest/inside_docker.rs

@@ -12,6 +12,10 @@ static CONTAINER_PREFIX: &str = "/outside";
 #[test]
 #[cfg(unix)]
 fn test_hello_world() {
+    // regression test for https://github.com/rust-lang/rustwide/issues/30
+    if !Path::new("docker").exists() {
+        std::fs::create_dir("docker").unwrap();
+    }
     execute("buildtest::test_hello_world").unwrap();
 }