Source code for stacker.lookups.handlers.split

from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
from . import LookupHandler
TYPE_NAME = "split"


[docs]class SplitLookup(LookupHandler):
[docs] @classmethod def handle(cls, value, **kwargs): """Split the supplied string on the given delimiter, providing a list. Format of value: <delimiter>::<value> For example: Subnets: ${split ,::subnet-1,subnet-2,subnet-3} Would result in the variable `Subnets` getting a list consisting of: ["subnet-1", "subnet-2", "subnet-3"] This is particularly useful when getting an output from another stack that contains a list. For example, the standard vpc blueprint outputs the list of Subnets it creates as a pair of Outputs (PublicSubnets, PrivateSubnets) that are comma separated, so you could use this in your config: Subnets: ${split ,::${output vpc::PrivateSubnets}} """ try: delimiter, text = value.split("::", 1) except ValueError: raise ValueError("Invalid value for split: %s. Must be in " "<delimiter>::<text> format." % value) return text.split(delimiter)