FileCopier: capture exceptions

Use ForkExecutor to capture exceptions instead of showing
a full traceback. FileCopier callers will now be responsible
for displaying relevant exception messages.

Bug: https://bugs.gentoo.org/699400
Signed-off-by: Zac Medico <zmedico@gentoo.org>

1 files changed, 9 insertions, 7 deletions

diff --git a/lib/portage/util/_async/FileCopier.py b/lib/portage/util/_async/FileCopier.py
index 27e5ab4c0..3a0be4b63 100644
--- a/lib/portage/util/_async/FileCopier.py
+++ b/lib/portage/util/_async/FileCopier.py
@@ -1,17 +1,19 @@
-# Copyright 2013 Gentoo Foundation
+# Copyright 2013-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-from portage import os
 from portage import shutil
-from portage.util._async.ForkProcess import ForkProcess
+from portage.util.futures import asyncio
+from portage.util.futures.executor.fork import ForkExecutor
+from portage.util._async.AsyncTaskFuture import AsyncTaskFuture
 
-class FileCopier(ForkProcess):
+class FileCopier(AsyncTaskFuture):
 	"""
 	Asynchronously copy a file.
 	"""
 
 	__slots__ = ('src_path', 'dest_path')
 
-	def _run(self):
-		shutil.copy(self.src_path, self.dest_path)
-		return os.EX_OK
+	def _start(self):
+		self.future = asyncio.ensure_future(self.scheduler.run_in_executor(ForkExecutor(loop=self.scheduler),
+			shutil.copy, self.src_path, self.dest_path))
+		super(FileCopier, self)._start()