fix: Directory file size shows differently across platforms

Author: DeflateAwning

src/filesystem.rs

@@ -59,6 +59,15 @@ pub fn is_empty(entry: &dir_entry::DirEntry) -> bool {
     }
 }
 
+pub fn file_size(entry: &dir_entry::DirEntry) -> Option<u64> {
+    let file_type = entry.file_type()?;
+    if file_type.is_dir() {
+        None
+    } else {
+        entry.metadata().map(|m| m.len())
+    }
+}
+
 #[cfg(any(unix, target_os = "redox"))]
 pub fn is_block_device(ft: fs::FileType) -> bool {
     ft.is_block_device()

src/walk.rs

@@ -694,7 +694,7 @@ type SortKeyValueFn = Box<dyn Fn(&DirEntry) -> Option<SortKeyValue>>;
 fn dir_entry_key_fn(sort_key: SortKey) -> SortKeyValueFn {
     match sort_key {
         SortKey::Path => Box::new(|e| Some(SortKeyValue::Path(e.path().to_path_buf()))),
-        SortKey::Size => Box::new(|e| e.metadata().map(|m| SortKeyValue::Size(m.len()))),
+        SortKey::Size => Box::new(|e| filesystem::file_size(e).map(SortKeyValue::Size)),
         SortKey::Created => {
             Box::new(|e| e.metadata().map(|m| SortKeyValue::Time(m.created().ok())))
         }