text: 
  
  class PipelineException(Exception):
      pass
  
  
  class PackageNotFound(PipelineException):
      pass
  
  
  class CompilerError(PipelineException):
      def __init__(self, msg, command=None, error_output=None):
          super(CompilerError, self).__init__(msg)
  
          self.command = command
          self.error_output = error_output.strip()
  
  
  class CompressorError(PipelineException):
      pass
  