This release has two great new features: Variables, and Config through Properties.

From the manual:

“Enabled the use of Properties file. For example: new Config(props) or GrooCSS.withPropertiesFile(filename) or with the Gradle plugin you can use propertiesFile = file("groocss.properties") within the task definition. Allows the property "processorClasses" to be a list of class-names separated by commas for Processors to use.”

“Added the ability to add variables to Config and have them available in scripts.”

1.0-RC1 works with Groovy 2.5 but you can specify 1.0-RC1-groovy2.5 or 1.0-RC1-groovy2.4 if you want to use Groovy 2.4.

Future releases might only work with Groovy 2.5 and up.