Fix UnicodeEncodeError on verbose output of unicode paths

We can't assume that the stdout encoding is not less restrictive
than the filesystem encoding.

attic/archiver.py

@@ -2,6 +2,7 @@
 from binascii import hexlify
 from datetime import datetime
 from operator import attrgetter
+import io
 import os
 import stat
 import sys
@@ -598,6 +599,10 @@ def run(self, args=None):
 
 
 def main():
+    # Make sure stdout and stderr have errors='replace') to avoid unicode
+    # issues when print()-ing unicode file names
+    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, sys.stdout.encoding, 'replace', line_buffering=sys.stdout.line_buffering)
+    sys.stderr = io.TextIOWrapper(sys.stderr.buffer, sys.stderr.encoding, 'replace', line_buffering=sys.stderr.line_buffering)
     archiver = Archiver()
     try:
         exit_code = archiver.run(sys.argv[1:])