old_contents: # coding: utf-8
  
  """
  This filter based on Jesús Jerez <jerezmoreno@gmail.com> code [1].
  
  [1] https://bitbucket.org/jhuss/webassets-libsass
  """
  
  from __future__ import print_function
  from __future__ import absolute_import
  
  from webassets.filter import Filter
  
  
  __all__ = ('LibSass',)
  
  
  class LibSass(Filter):
      """Converts `Sass <http://sass-lang.com/>`_ markup to real CSS.
  
      Requires the ``libsass`` package (https://pypi.python.org/pypi/libsass)::
  
          pip install libsass
  
      `libsass <http://dahlia.kr/libsass-python>`_ is binding to C/C++
      implementation of a Sass compiler `Libsass
      <https://github.com/hcatlin/libsass>`_
  
      *Configuration options:*
  
      LIBSASS_STYLE (style)
          an optional coding style of the compiled result. choose one of:
          `nested` (default), `expanded`, `compact`, `compressed`
  
      LIBSASS_INCLUDES (includes)
          an optional list of paths to find @imported SASS/CSS source files
  
      See libsass documentation for full documentation about these configuration
      options:
  
          http://hongminhee.org/libsass-python/sass.html#sass.compile
      """
      name = 'libsass'
      options = {
          'style': 'LIBSASS_STYLE',
          'includes': 'LIBSASS_INCLUDES'
      }
      max_debug_level = None
  
      def setup(self):
          super(LibSass, self).setup()
  
          try:
              import sass
          except ImportError:
              raise EnvironmentError('The "libsass" package is not installed.')
          else:
              self.sass = sass
  
          if not self.style:
              self.style = 'nested'
  
      def input(self, _in, out, **kwargs):
          source_path = kwargs['source_path']
  
          out.write(
              # http://hongminhee.org/libsass-python/sass.html#sass.compile
              self.sass.compile(
                  filename=source_path,
                  output_style=self.style,
                  include_paths=(self.includes if self.includes else [])
              )
          )
  
new_contents: # coding: utf-8
  
  """
  This filter based on Jesús Jerez <jerezmoreno@gmail.com> code [1].
  
  [1] https://bitbucket.org/jhuss/webassets-libsass
  """
  
  from __future__ import print_function
  from __future__ import absolute_import
  
  from webassets.filter import Filter
  
  
  __all__ = ('LibSass',)
  
  
  class LibSass(Filter):
      """Converts `Sass <http://sass-lang.com/>`_ markup to real CSS.
  
      Requires the ``libsass`` package (https://pypi.python.org/pypi/libsass)::
  
          pip install libsass
  
      `libsass <http://dahlia.kr/libsass-python>`_ is binding to C/C++
      implementation of a Sass compiler `Libsass
      <https://github.com/hcatlin/libsass>`_
  
      *Configuration options:*
  
      LIBSASS_STYLE (style)
          an optional coding style of the compiled result. choose one of:
          `nested` (default), `expanded`, `compact`, `compressed`
  
      LIBSASS_INCLUDES (includes)
          an optional list of paths to find @imported SASS/CSS source files
  
      See libsass documentation for full documentation about these configuration
      options:
  
          http://hongminhee.org/libsass-python/sass.html#sass.compile
  
      *Example:*
  
      Define a bundle for ``style.scss`` that contains ``@imports`` to files in
      subfolders:
  
      .. code-block:: python
  
          Bundle('style.scss', filters='libsass', output='style.css', depends'**/*.scss')
      
      """
      name = 'libsass'
      options = {
          'style': 'LIBSASS_STYLE',
          'includes': 'LIBSASS_INCLUDES'
      }
      max_debug_level = None
  
      def setup(self):
          super(LibSass, self).setup()
  
          try:
              import sass
          except ImportError:
              raise EnvironmentError('The "libsass" package is not installed.')
          else:
              self.sass = sass
  
          if not self.style:
              self.style = 'nested'
  
      def input(self, _in, out, **kwargs):
          source_path = kwargs['source_path']
  
          out.write(
              # http://hongminhee.org/libsass-python/sass.html#sass.compile
              self.sass.compile(
                  filename=source_path,
                  output_style=self.style,
                  include_paths=(self.includes if self.includes else [])
              )
          )
  
subject: add Bundle example using depends option