Implement getattrlist for improved CoW detection

opencore_legacy_patcher/volume/copy.py

@@ -0,0 +1,35 @@
+"""
+copy.py: Generate performant '/bin/cp' arguments for macOS
+"""
+
+from pathlib import Path
+
+from .properties import PathAttributes
+
+
+def can_copy_on_write(source: str, destination: str) -> bool:
+    """
+    Check if Copy on Write is supported between source and destination
+    """
+    source_obj = PathAttributes(source)
+    return source_obj.mount_point() == PathAttributes(str(Path(destination).parent)).mount_point() and source_obj.supports_clonefile()
+
+
+def generate_copy_arguments(source: str, destination: str) -> list:
+    """
+    Generate performant '/bin/cp' arguments for macOS
+    """
+    _command = ["/bin/cp", source, destination]
+    if not Path(source).exists():
+        raise FileNotFoundError(f"Source file not found: {source}")
+    if not Path(destination).parent.exists():
+        raise FileNotFoundError(f"Destination directory not found: {destination}")
+
+    # Check if Copy on Write is supported.
+    if can_copy_on_write(source, destination):
+        _command.insert(1, "-c")
+
+    if Path(source).is_dir():
+        _command.insert(1, "-R")
+
+    return _command