wasi: fix warnings

Author: cakebaker

src/uu/wc/src/countable.rs

@@ -24,6 +24,7 @@ pub trait WordCountable: AsFd + AsRawFd + Read {
 pub trait WordCountable: Read {
     type Buffered: BufRead;
     fn buffered(self) -> Self::Buffered;
+    #[cfg(not(target_os = "wasi"))]
     fn inner_file(&mut self) -> Option<&mut File>;
 }
 
@@ -33,6 +34,8 @@ impl WordCountable for StdinLock<'_> {
     fn buffered(self) -> Self::Buffered {
         self
     }
+
+    #[cfg(not(target_os = "wasi"))]
     fn inner_file(&mut self) -> Option<&mut File> {
         None
     }
@@ -45,6 +48,7 @@ impl WordCountable for File {
         BufReader::new(self)
     }
 
+    #[cfg(not(target_os = "wasi"))]
     fn inner_file(&mut self) -> Option<&mut File> {
         Some(self)
     }

src/uucore/src/lib/features/fs.rs

@@ -46,7 +46,7 @@ pub struct FileInformation(
     #[cfg(unix)] nix::sys::stat::FileStat,
     #[cfg(windows)] winapi_util::file::Information,
     // WASI does not have nix::sys::stat, so we store std::fs::Metadata instead.
-    #[cfg(target_os = "wasi")] std::fs::Metadata,
+    #[cfg(target_os = "wasi")] fs::Metadata,
 );
 
 impl FileInformation {
@@ -97,9 +97,9 @@ impl FileInformation {
         #[cfg(target_os = "wasi")]
         {
             let metadata = if dereference {
-                std::fs::metadata(path.as_ref())
+                fs::metadata(path.as_ref())
             } else {
-                std::fs::symlink_metadata(path.as_ref())
+                fs::symlink_metadata(path.as_ref())
             };
             Ok(Self(metadata?))
         }

src/uucore/src/lib/features/fsext.rs

@@ -28,6 +28,7 @@ use crate::os_str_from_bytes;
 #[cfg(windows)]
 use crate::show_warning;
 
+#[cfg(not(target_os = "wasi"))]
 use std::ffi::OsStr;
 #[cfg(unix)]
 use std::os::unix::ffi::OsStrExt;
@@ -64,13 +65,14 @@ use libc::{
 };
 #[cfg(unix)]
 use std::ffi::{CStr, CString};
+#[cfg(not(target_os = "wasi"))]
 use std::io::Error as IOError;
 #[cfg(unix)]
 use std::mem;
 #[cfg(windows)]
 use std::path::Path;
 use std::time::SystemTime;
-#[cfg(not(windows))]
+#[cfg(unix)]
 use std::time::UNIX_EPOCH;
 use std::{borrow::Cow, ffi::OsString};