Add common function to parse python dict

Add the common function to parse python dict representation to a puppet
hash value, to replace the same implementation maintained in a few
modules.

Change-Id: I95040c07bb4ed0daee5a97e4e1108d6b24ed0ef6

lib/puppet/provider/openstack.rb

@@ -159,4 +159,8 @@ class Puppet::Provider::Openstack < Puppet::Provider
     text = text.split("\n").drop_while { |line| line !~ /^\".*\"/ }.join("\n")
     return CSV.parse(text + "\n")
   end
+
+  def self.parse_python_dict(text)
+    return JSON.parse(text.gsub(/'/, '"').gsub(/: False([,}])/,': false\1').gsub(/: True([,}])/,': true\1'))
+  end
 end

spec/unit/provider/openstack_spec.rb

@@ -210,4 +210,23 @@ name="test"
       end
     end
   end
+
+  describe '#parse_python_dict' do
+    it 'should return a hash when provided with a python dict' do
+      s = "{'key': 'value', 'key2': 'value2'}"
+      expect(Puppet::Provider::Openstack.parse_python_dict(s)).to eq({'key'=>'value', 'key2'=>'value2'})
+
+      s = "{'key': True, 'key2': 'value2'}"
+      expect(Puppet::Provider::Openstack.parse_python_dict(s)).to eq({'key'=>true, 'key2'=>'value2'})
+
+      s = "{'key': 'value', 'key2': True}"
+      expect(Puppet::Provider::Openstack.parse_python_dict(s)).to eq({'key'=>'value', 'key2'=>true})
+
+      s = "{'key': False, 'key2': 'value2'}"
+      expect(Puppet::Provider::Openstack.parse_python_dict(s)).to eq({'key'=>false, 'key2'=>'value2'})
+
+      s = "{'key': 'value', 'key2': False}"
+      expect(Puppet::Provider::Openstack.parse_python_dict(s)).to eq({'key'=>'value', 'key2'=>false})
+    end
+  end
 end