Enhanced copyfile function

fs/utils.py

+import shutil
+
+def copyfile(src_fs, src_path, dst_fs, dst_path, chunk_size=1024*16):
+
+    def getsyspath(_fs, path):
+        try:
+            return _fs.getsyspath(path)
+        except NoSysPathError:
+            return ""
+
+    src_syspath = src_fs.getsyspath(src_path)
+    dst_syspath = dst_fs.getsyspath(dst_path)
+
+    # System copy if there are two sys paths
+    if src_syspath and dst_syspath:
+        shutil.copyfile(src_syspath, dst_syspath)
+        return
+
+    src = src_fs.open(src_path, 'rb')
+    dst = dst_fs.open(dst_path, 'wb')
+
+    # Chunk copy
+    while True:
+        chunk = src.read(chunk_size)
+        if not chunk:
+            break
+        dst.write(chunk)