conditional.py 文件源码

def evaluate_conditional(self, templar, all_vars):
        '''
        Loops through the conditionals set on this object, returning
        False if any of them evaluate as such.
        '''

        # since this is a mix-in, it may not have an underlying datastructure
        # associated with it, so we pull it out now in case we need it for
        # error reporting below
        ds = None
        if hasattr(self, '_ds'):
            ds = getattr(self, '_ds')

        try:
            # this allows for direct boolean assignments to conditionals "when: False"
            if isinstance(self.when, bool):
                return self.when

            for conditional in self.when:
                if not self._check_conditional(conditional, templar, all_vars):
                    return False
        except Exception as e:
            raise AnsibleError("The conditional check '%s' failed. The error was: %s" % (to_native(conditional), to_native(e)), obj=ds)

        return True