text: # Copyright (c) 2012 Roberto Alsina y otros.
  
  # Permission is hereby granted, free of charge, to any
  # person obtaining a copy of this software and associated
  # documentation files (the "Software"), to deal in the
  # Software without restriction, including without limitation
  # the rights to use, copy, modify, merge, publish,
  # distribute, sublicense, and/or sell copies of the
  # Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice
  # shall be included in all copies or substantial portions of
  # the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  # PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
  # OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  # OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  from __future__ import print_function
  
  from nikola.plugin_categories import Command
  from nikola.main import VERSION
  
  
  class CommandVersion(Command):
      """Print the version."""
  
      name = "version"
  
      doc_usage = ""
      needs_config = False
      doc_purpose = """Print the Nikola version number."""
  
      def _execute(self, options={}, args=None):
          """Print the version number."""
          print("Nikola version %s" % VERSION)
  