+# -*- coding: utf-8 -*-
+#
# Copyright 2012 GRNET S.A. All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
+"""This module provides various helper functions to be used by other parts of
+the package.
+"""
+
import sh
import hashlib
import time
import os
+import re
class FatalError(Exception):
return find_sbin_command(command, e)
+def get_kvm_binary():
+ """Returns the path to the kvm binary and some extra arguments if needed"""
+
+ uname = get_command('uname')
+ which = get_command('which')
+
+ machine = str(uname('-m')).strip()
+ if re.match('i[3-6]86', machine):
+ machine = 'i386'
+
+ binary = which('qemu-system-%s' % machine)
+
+ needed_args = "--enable-kvm",
+
+ if binary is None:
+ return which('kvm'), tuple()
+
+ return binary, needed_args
+
+
def try_fail_repeat(command, *args):
"""Execute a command multiple times until it succeeds"""
times = (0.1, 0.5, 1, 2)