| // 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.buildjar; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.buildjar.jarhelper.JarCreator; |
| import com.google.devtools.build.buildjar.javac.JavacRunner; |
| |
| import com.sun.tools.javac.main.Main.Result; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * An implementation of the JavaBuilder that uses in-process javac to compile java files. |
| */ |
| public class SimpleJavaLibraryBuilder extends AbstractJavaBuilder { |
| |
| @Override |
| Result compileSources(JavaLibraryBuildRequest build, JavacRunner javacRunner, PrintWriter err) |
| throws IOException { |
| String[] javacArguments = makeJavacArguments(build, build.getClassPath()); |
| return javacRunner.invokeJavac(javacArguments, err); |
| } |
| |
| @Override |
| protected void prepareSourceCompilation(JavaLibraryBuildRequest build) throws IOException { |
| super.prepareSourceCompilation(build); |
| |
| // Create sourceGenDir if necessary. |
| if (build.getSourceGenDir() != null) { |
| File sourceGenDir = new File(build.getSourceGenDir()); |
| if (sourceGenDir.exists()) { |
| try { |
| cleanupOutputDirectory(sourceGenDir); |
| } catch (IOException e) { |
| throw new IOException("Cannot clean output directory '" + sourceGenDir + "'", e); |
| } |
| } |
| sourceGenDir.mkdirs(); |
| } |
| } |
| |
| /** |
| * For the build configuration 'build', construct a command line that |
| * can be used for a javac invocation. |
| */ |
| protected String[] makeJavacArguments(JavaLibraryBuildRequest build) { |
| return makeJavacArguments(build, build.getClassPath()); |
| } |
| |
| /** |
| * For the build configuration 'build', construct a command line that |
| * can be used for a javac invocation. |
| */ |
| protected String[] makeJavacArguments(JavaLibraryBuildRequest build, String classPath) { |
| List<String> javacArguments = createInitialJavacArgs(build, classPath); |
| |
| javacArguments.addAll(getAnnotationProcessingOptions(build)); |
| |
| for (String option : build.getJavacOpts()) { |
| if (option.startsWith("-J")) { // ignore the VM options. |
| continue; |
| } |
| if (option.equals("-processor") || option.equals("-processorpath")) { |
| throw new IllegalStateException( |
| "Using " + option + " in javacopts is no longer supported." |
| + " Use a java_plugin() rule instead."); |
| } |
| javacArguments.add(option); |
| } |
| |
| javacArguments.addAll(build.getSourceFiles()); |
| return javacArguments.toArray(new String[0]); |
| } |
| |
| /** |
| * Given a JavaLibraryBuildRequest, computes the javac options for the annotation processing |
| * requested. |
| */ |
| private List<String> getAnnotationProcessingOptions(JavaLibraryBuildRequest build) { |
| List<String> args = new ArrayList<>(); |
| |
| // Javac treats "-processorpath ''" as setting the processor path to an empty list, |
| // whereas omitting the option is treated as not having a processor path (which causes |
| // processor path searches to fallback to the class path). |
| args.add("-processorpath"); |
| args.add( |
| build.getProcessorPath().isEmpty() ? "" : build.getProcessorPath()); |
| |
| if (!build.getProcessors().isEmpty() && !build.getSourceFiles().isEmpty()) { |
| // ImmutableSet.copyOf maintains order |
| ImmutableSet<String> deduplicatedProcessorNames = ImmutableSet.copyOf(build.getProcessors()); |
| args.add("-processor"); |
| args.add(Joiner.on(',').join(deduplicatedProcessorNames)); |
| |
| // Set javac output directory for generated sources. |
| if (build.getSourceGenDir() != null) { |
| args.add("-s"); |
| args.add(build.getSourceGenDir()); |
| } |
| } else { |
| // This is necessary because some jars contain discoverable annotation processors that |
| // previously didn't run, and they break builds if the "-proc:none" option is not passed to |
| // javac. |
| args.add("-proc:none"); |
| } |
| |
| return args; |
| } |
| |
| @Override |
| public void buildGensrcJar(JavaLibraryBuildRequest build, OutputStream err) |
| throws IOException { |
| JarCreator jar = new JarCreator(build.getGeneratedSourcesOutputJar()); |
| jar.setNormalize(true); |
| jar.setCompression(build.compressJar()); |
| jar.addDirectory(build.getSourceGenDir()); |
| jar.execute(); |
| } |
| } |