Flush files after copying

This resolves an issue where qemu sees an incomplete image when
--ephemeral is used.

diff --git a/mkosi/__init__.py b/mkosi/__init__.py
index 218099b8e7c462cb114d17d61fc2e8aacabcd577..9ead74089c64f0af4aad0705d38e8a84b756e374 100644 (file)
--- a/mkosi/__init__.py
+++ b/mkosi/__init__.py
@@ -616,6 +616,7 @@ def copy_file_object(oldobject: BinaryIO, newobject: BinaryIO) -> None:
         if e.errno not in {errno.EXDEV, errno.EOPNOTSUPP, errno.ENOTTY}:
             raise
         shutil.copyfileobj(oldobject, newobject)
+        newobject.flush()
 
 
 def copy_file(oldpath: PathString, newpath: PathString) -> None: