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module Puppet::Parser::Functions
newfunction(:lookup_hiera_hash, :arity => 2, :type => :rvalue,
:doc => "Lookup a key->value from a Hiera hash") do |args|
hash_name = args[0]
key_name = args[1]
unless hash_name.is_a?(String) and key_name.is_a?(String)
raise Puppet::ParseError, "The hash name and the key name must be given as strings."
end
if defined? call_function
hash = call_function('hiera', [hash_name])
else
hash = function_hiera([hash_name])
end
unless hash.is_a?(Hash)
raise Puppet::ParseError, "The value Hiera returned for #{hash_name} is not a Hash."
end
unless hash.key?(key_name)
raise Puppet::ParseError, "The Hiera hash #{hash_name} does not contain key #{key_name}."
end
return hash[key_name]
end
end
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