Check Ants codebase against certain code styleguide rules using checkstyle and simian. Checkstyle uses an abstract syntax tree (AST) for doing checks against java sources. It is available at http://checkstyle.sourceforge.net/ under GPL 2.1 license. "Simian (Similarity Analyser) identifies duplication in Java, C#, C, CPP, COBOL, JSP, HTML source code and even plain text files." It is available at http://www.redhillconsulting.com.au/products/simian/ and is for free use in open source projects. See external task page and homepages for more information. Found antlr on the classpath. Having a wrong antlr version on the same classpath as Checkstyle may produce errors like 'Can't find/access AST Node typecom.puppycrawl.tools.checkstyle.api.DetailAST' Skip running Checkstyle. ${report} Install Simian ${simian.version} Run Simian