code: def compile_source(self, sourcepath):
          
          relpath = os.path.relpath(sourcepath, self.settings.SOURCES_PATH)
  
          conditions = {
              'sourcedir': None,
              'nopartial': True,
              'exclude_patterns': self.settings.EXCLUDES,
              'excluded_libdirs': self.settings.LIBRARY_PATHS,
          }
          if self.finder.match_conditions(sourcepath, **conditions):
              destination = self.finder.get_destination(
                  relpath,
                  targetdir=self.settings.TARGET_PATH
              )
  
              self.logger.debug(u"Compile: {}".format(sourcepath))
              success, message = self.compiler.safe_compile(
                  self.settings,
                  sourcepath,
                  destination
              )
  
              if success:
                  self.logger.info(u"Output: {}".format(message))
              else:
                  self.logger.error(message)
  
              return sourcepath, destination
  
          return None
docs: Compile source to its destination
  
          Check if the source is eligible to compile (not partial and allowed
          from exclude patterns)
  
          Args:
              sourcepath (string): Sass source path to compile to its
                  destination using project settings.
  
          Returns:
              tuple or None: A pair of (sourcepath, destination), if source has
                  been compiled (or at least tried). If the source was not
                  eligible to compile, return will be ``None``.