docs: def recurse_up(directory, filename):
  	"""
  	Recursive walk a directory up to root until it contains `filename`
  	"""
  
  	directory = osp.abspath(directory)
  
  	while True:
  		searchfile = osp.join(directory, filename)
  
  		if osp.isfile(searchfile):
  			return directory
  
  		if directory == '/': break
  		else: directory = osp.dirname(directory)
  	return False