#! /usr/bin/python2.6
#
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"""
Boot variables backend support for pybootmgmt
"""
import sys
from bootmgmt import bootutil
from bootmgmt import BootmgmtArgumentError
class BackendBootVarsFactory(object):
@staticmethod
def get(sysroot, arch, osname):
"""Returns an instance of bootinfo.BootVariables corresponding to the
architecture and system root passed in."""
if arch is None:
arch = bootutil.get_current_arch_string()
if osname is None:
raise BootmgmtArgumentError('osname cannot be None')
bvmod = __name__ + '.' + arch + '.' + osname
__import__(bvmod, level=0)
ns = sys.modules[bvmod]
# bootvars_backend returns the *class*
bootvar_backend_class = ns.bootvars_backend()
if bootvar_backend_class:
return bootvar_backend_class(sysroot)
else:
return None