Check Ant codebase against certain code style guidelines using Checkstyle, Apache Rat, SpotBugs, OWASP Dependency Check, Simian and Nu Html Checker (v.Nu). Checkstyle uses an abstract syntax tree (AST) for doing checks against Java sources. It is available at https://checkstyle.org/ under GPL 2.1 license. "Apache Rat is a release audit tool, focused on licenses." It is available at https://creadur.apache.org/rat/ under Apache License, Version 2.0. "SpotBugs is a program which uses static analysis to look for bugs in Java code." It is available at https://spotbugs.github.io/ under LGPL 3 license. "Dependency-Check is a utility that identifies project dependencies and checks if there are any known, publicly disclosed, vulnerabilities." It is available at https://www.owasp.org/index.php/OWASP_Dependency_Check under Apache License, Version 2.0. "Simian (Similarity Analyser) identifies duplication in Java, C#, C, CPP, COBOL, Ruby, JSP, ASP, HTML, XML, Visual Basic, Groovy source code and even plain text files." It is available at https://www.harukizaemon.com/simian/ and is for free use in open source projects. "The Nu Html Checker (v.Nu) is the backend of checker.html5.org, html5.validator.nu, and validator.w3.org/nu." It is available at https://validator.github.io/validator/ under MIT license. 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 Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at https://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.