| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed 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 |
| // |
| // http://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. |
| package com.google.devtools.build.docgen; |
| |
| import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * The main class for the docgen project. The class checks the input arguments |
| * and uses the BuildEncyclopediaProcessor for the actual documentation generation. |
| */ |
| public class BuildEncyclopediaGenerator { |
| |
| private static boolean checkArgs(String[] args) { |
| if (args.length < 2) { |
| System.err.println("There has to be two to four input parameters\n" |
| + " - a comma separated list for input directories\n" |
| + " - the name of the rule class provider\n" |
| + " - an output directory (optional)." |
| + " - a path to a file listing rules to not document (optional)"); |
| return false; |
| } |
| return true; |
| } |
| |
| private static void fail(Throwable e, boolean printStackTrace) { |
| System.err.println("ERROR: " + e.getMessage()); |
| if (printStackTrace) { |
| e.printStackTrace(); |
| } |
| Runtime.getRuntime().exit(1); |
| } |
| |
| private static ConfiguredRuleClassProvider createRuleClassProvider(String classProvider) |
| throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, |
| IllegalAccessException { |
| Class<?> providerClass = Class.forName(classProvider); |
| Method createMethod = providerClass.getMethod("create"); |
| return (ConfiguredRuleClassProvider) createMethod.invoke(null); |
| } |
| |
| public static void main(String[] args) { |
| if (checkArgs(args)) { |
| // TODO(bazel-team): use flags |
| try { |
| BuildEncyclopediaProcessor processor = new BuildEncyclopediaProcessor( |
| createRuleClassProvider(args[1])); |
| processor.generateDocumentation( |
| args[0].split(","), getArgsOrNull(args, 2), getArgsOrNull(args, 3)); |
| } catch (BuildEncyclopediaDocException e) { |
| fail(e, false); |
| } catch (Throwable e) { |
| fail(e, true); |
| } |
| } |
| } |
| |
| private static String getArgsOrNull(String[] args, int idx) { |
| return args.length > idx ? args[idx] : null; |
| } |
| } |