feat: Implement fallback file move

src/main.rs

@@ -42,17 +42,22 @@ where
         tmp.into_temp_path()
     };
 
-    if let Err(err) = fs::rename(&tmp_path, &path) {
-        let tmp_path = tmp_path
-            .keep()
-            .with_context(|| "failed to persist temporary file")?;
-        bail!(
-            "failed to rename temporary file to override the sound bank: {}!\n\
-                Please manually copy the file from {} to {}.",
-            err,
-            tmp_path.display(),
-            path.as_ref().display()
-        );
+    if let Err(_) = fs::rename(&tmp_path, &path) {
+        // Attempt manual copy-and-delete
+        let mut tmp = File::open(&tmp_path).with_context(|| "failed to open tempfile for reading")?;
+        let mut f = File::open(&path).with_context(|| "failed to open destination file")?;
+        if let Err(err) = io::copy(&mut tmp, &mut f) {
+            let tmp_path = tmp_path
+                .keep()
+                .with_context(|| "failed to persist temporary file")?;
+            bail!(
+                "failed to rename or move temporary file to override the sound bank: {}!\n\
+                Please manually move the file from {} to {}.",
+                err,
+                tmp_path.display(),
+                path.as_ref().display()
+            );
+        }
     }
 
     Ok(())