ConfigFromStack returns a yaml string containing the tags and parameters of the given stack.

GetDeployConfig populates an instance of DeployConfig based on user-supplied values.

GetParameters checks the combined params supplied as args and in a file and asks the user to supply any values that are missing.

GetStackName returns stackName if it is not blank, otherwise it creates a name based on the template file name.

ListToMap converts a pflag parsed StringSlice into a map where values are expected to be presented in the form Foo=bar,Baz=quux,mooz,Xyzzy=garply.

converts map of strings to a slice of types.Tag.