cfp 1.0.0a3

Builds Amazon Web Services CloudFormation parameters

cfp

cfp is a Python package for building Amazon Web Services CloudFormation stack parameters.

In particular, cfp helps to efficiently reference parameter values in Parameter Store, even across accounts and regions.

The output is compatible with boto3.

Examples

from cfp import StackParameters

sp = StackParameters()
sp.add("ParameterA", "Value A")
sp.add("ParameterB", "Value B")

print(sp.api_parameters)

[{'ParameterKey': 'ParameterA', 'ParameterValue': 'Value A'}, {'ParameterKey': 'ParameterB', 'ParameterValue': 'Value B'}]

The api_parameters property can be passed directly to boto3:

from cfp import StackParameters
from boto3.session import Session

sp = StackParameters()
sp.add("ParameterA", "Value A")
sp.add("ParameterB", "Value B")

client = session.client("cloudformation")
client.create_change_set(
    StackName="MyStack",
    ChangeSetName="MyChangeSet",
    ChangeSetType="UPDATE,
    Parameters=sp.api_parameters,
    TemplateBody="...",
)

To look-up a value in Systems Manager Parameter Store, set the parameter's value to a .FromParameterStore instance:

from cfp import FromParameterStore, StackParameters

sp = StackParameters()
sp.add("ParameterA", FromParameterStore("/cfp/example1"))
sp.add("ParameterB", FromParameterStore("/cfp/example2"))

print(sp.api_parameters)

[{'ParameterKey': 'ParameterA', 'ParameterValue': 'foo'}, {'ParameterKey': 'ParameterB', 'ParameterValue': 'bar'}]

Read the full documentation at cariad.github.io/cfp.

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