lib/mixlib/config.rb in mixlib-config-3.0.6 vs lib/mixlib/config.rb in mixlib-config-3.0.9

@@ -67,24 +67,24 @@
     # Parses valid YAML structure into Ruby so it can be ingested into the Class
     #
     # === Parameters
     # filename<String>:: A filename to read from
     def from_yaml(filename)
-      require "yaml"
+      require "yaml" unless defined?(YAML)
       from_hash(YAML.load(IO.read(filename)))
     end
 
     # Parses valid JSON structure into Ruby
     #
     # === Parameters
     # filename<String>:: A filename to read from
     def from_json(filename)
-      require "json"
+      require "json" unless defined?(JSON)
       from_hash(JSON.parse(IO.read(filename)))
     end
 
     def from_toml(filename)
-      require "tomlrb"
+      require "tomlrb" unless defined?(Tomlrb)
       from_hash(Tomlrb.parse(IO.read(filename), symbolize_keys: true))
     end
 
     # Transforms a Hash into method-style configuration syntax to be processed
     #