text: #!/usr/bin/env python
  #   Copyright 2011 Evan Hazlett <ejhazlett@gmail.com>
  #
  #   Licensed 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.
  
  import logging
  import commands
  import os
  
  def check_command(command):
      cmd = commands.getoutput('which {0}'.format(command))
      if cmd == '':
          logging.error('{0} not found on path'.format(command))
          return False
      else:
          return True
  
  def add_static_dir(root_dir=None, project_name=None, static_dir_path=None, alias=None):
      log = logging.getLogger('common')
      conf_file = os.path.join(root_dir, 'conf' + os.sep + '{0}_nginx.conf'.format(project_name))
      if not os.path.exists(conf_file):
          log.error('Unable to find config file: {0}.  Please check root directory and project name'.format(conf_file))
          return
      log.info('Creating static directory alias')
      f = open(conf_file, 'r')
      cfg = f.readlines()
      f.close()
      new_cfg = ''
      location_found = False
      alias_added = False
      for l in cfg:
          if l.find('location') > -1:
              location_found = True
              new_cfg += l
          elif location_found and l.find('}') > -1 and not alias_added:
              # end of location found ; add alias
              new_cfg += l
              alias = '\t\tlocation {0} {{\n'.format(alias)
              alias += '\t\t\talias {0};\n'.format(static_dir_path)
              alias += '\t\t}\n'
              new_cfg += alias
              location_found = False
              alias_added = True
          else:
              new_cfg += l
      f = open(conf_file, 'w')
      f.write(new_cfg)
      f.close()
  
  