code: def get_pipeline_path(pipeline_name, working_directory):
      
      logger.debug("starting")
  
      # look for name.yaml in the pipelines/ sub-directory
      logger.debug(f"current directory is {working_directory}")
  
      # looking for {cwd}/pipelines/[pipeline_name].yaml
      pipeline_path = os.path.abspath(os.path.join(
          working_directory,
          'pipelines',
          pipeline_name + '.yaml'))
  
      if os.path.isfile(pipeline_path):
          logger.debug(f"Found {pipeline_path}")
      else:
          logger.debug(f"{pipeline_name} not found in current "
                       "directory/pipelines folder. Looking in pypyr install "
                       "directory instead.")
          pypyr_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
          logger.debug(f"pypyr installation directory is: {pypyr_dir}")
          pipeline_path = os.path.abspath(os.path.join(
              pypyr_dir,
              'pipelines',
              pipeline_name + '.yaml'))
  
          if os.path.isfile(pipeline_path):
              logger.debug(f"Found {pipeline_path}")
          else:
              raise PipelineNotFoundError(f"{pipeline_name}.yaml not found in "
                                          f"either "
                                          f"{working_directory}/pipelines "
                                          f"or {pypyr_dir}/pipelines")
  
      logger.debug("done")
      return pipeline_path
docs: Look for the pipeline in the various places it could be.
  
      First checks the cwd. Then checks pypyr/pipelines dir.
  
      Args:
          pipeline_name: string. Name of pipeline to find
          working_directory: string. Path in which to look for pipeline_name.yaml
  
      Returns:
          Absolute path to the pipeline_name.yaml file
  
      Raises:
          PipelineNotFoundError: if pipeline_name.yaml not found in working_dir
                                 or in {pypyr install dir}/pipelines.