def __enter__(self):
assert not self._joined, "cannot join environment twice"
for directory in ['/dev', '/sys', '/proc']:
execute_command('mount', '--bind', directory,
joinpaths(self.root, directory[1:]))
execute_command('mount', '--bind', config.GLOBAL_PACMAN_CACHE,
joinpaths(self.root, 'var/cache/pacman'))
self._joined = True
def __exit__(self, *exc_info):
for directory in ['dev', 'sys', 'proc', 'var/cache/pacman']:
execute_command('umount', joinpaths(self.root, directory))
self._joined = False
def execute(self, *command):
assert self._joined, "join first"
execute_command('chroot', self.root, *command)
def execute(self, *args):
execute_command(*self._get_command(*args))
