Factor error printing into one thing

src/main-export-known-hosts.py

@@ -51,33 +51,27 @@ def main():
 	# returns, we have correct arguments
 	args = parser.parse_args()
 
-	try:
-		with open(args.infile, 'r') as f:
-			known_host_entries = process_known_hosts.process_file(f, args.ignore_ips)
-	except Exception as err:
-		print('Error: %s' % err, file=sys.stderr)
-		sys.exit(1)
+	with open(args.infile, 'r') as f:
+		known_host_entries = process_known_hosts.process_file(f, args.ignore_ips)
 
 	# Convert to the entry format for .sshwot files
 	entries = []
 	for known_hosts_entry in known_host_entries:
 		entries.append(process_known_hosts.known_hosts_to_entry(known_hosts_entry))
 
+	if args.outfile is None:
+		# Write to stdout by default
+		# We use sys.stdout.buffer instead of just sys.stdout because we
+		# are writing binary data
+		write_file.write(sys.stdout.buffer, entries)
+
+	else:
+		with open(args.outfile, 'wb') as outf:
+			write_file.write(outf, entries)
+
+if __name__ == '__main__':
 	try:
-		if args.outfile is None:
-			# Write to stdout by default
-			# We use sys.stdout.buffer instead of just sys.stdout because we
-			# are writing binary data
-			write_file.write(sys.stdout.buffer, entries)
-
-		else:
-			with open(args.outfile, 'wb') as outf:
-				write_file.write(outf, entries)
-
+		main()
 	except Exception as err:
 		print('Error: %s' % err, file=sys.stderr)
 		sys.exit(1)
-
-if __name__ == '__main__':
-	main()
-