runway.cfngin.lookups.handlers.split module

Split lookup.

class runway.cfngin.lookups.handlers.split.SplitLookup[source]

Bases: runway.lookups.handlers.base.LookupHandler

Split lookup.

classmethod handle(value, context=None, provider=None, **kwargs)[source]

Split the supplied string on the given delimiter, providing a list.

Parameters
Returns

Looked up value.

Return type

str

Format of value:

<delimiter>::<value>

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}}