(CONT-1023) - Enhancing deferrable_epp to support nested hash

Author: Ramesh7

functions/deferrable_epp.pp

@@ -6,7 +6,7 @@
 # have to explicitly pass the entire scope to the client.
 #
 function stdlib::deferrable_epp(String $template, Hash $variables) >> Variant[String, Sensitive[String], Deferred] {
-  if $variables.any |$key, $value| { $value.is_a(Deferred) } {
+  if $variables.hash_values.any |$value| { $value.is_a(Deferred) } {
     Deferred(
       'inline_epp',
       [find_template($template).file, $variables],

lib/puppet/functions/stdlib/hash_values.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+# This function will return list of Hash values, the return value will be Array
+# NOTE : This function is expecting only Hash and return value will be Array
+Puppet::Functions.create_function(:'stdlib::hash_values') do
+  dispatch :hash_values do
+    param 'Hash', :options
+    return_type 'Array'
+  end
+
+  def hash_values(options)
+    fetch_values(options)
+  end
+
+  def fetch_values(opts = {})
+    opts.each_with_object([]) do |(_k, v), values|
+      v.is_a?(Hash) ? values.concat(fetch_values(v)) : (values << v)
+    end
+  end
+end

spec/functions/hash_values_spec.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'stdlib::hash_values' do
+  # please note that these tests are examples only
+  # you will need to replace the params and return value
+  # with your expectations
+  it { is_expected.to run.with_params({}).and_return([]) }
+  it { is_expected.to run.with_params({ 'key' => 'value' }).and_return(['value']) }
+  it { is_expected.to run.with_params({ 'key' => { 'key1' => 'value1', 'key2' => 'value2' } }).and_return(['value1', 'value2']) }
+  it { is_expected.to run.with_params(2).and_raise_error(StandardError) }
+  it { is_expected.to run.with_params(nil).and_raise_error(StandardError) }
+end