ambari-agent/src/main/python/resource_management/libraries/functions/format.py

#!/usr/bin/env python2.6
"""
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Ambari Agent

"""

__all__ = ["format"]
import sys
from string import Formatter
from resource_management.core.exceptions import Fail
from resource_management.core.utils import checked_unite
from resource_management.core.environment import Environment


class ConfigurationFormatter(Formatter):
  def format(self, format_string, *args, **kwargs):
    env = Environment.get_instance()
    variables = kwargs
    params = env.config.params
    
    result = checked_unite(variables, params)
    return self.vformat(format_string, args, result)
      
  
def format(format_string, *args, **kwargs):
  variables = sys._getframe(1).f_locals
  
  result = checked_unite(kwargs, variables)
  result.pop("self", None) # self kwarg would result in an error
  return ConfigurationFormatter().format(format_string, args, **result)