| /* |
| * Copyright 2012-present Facebook, Inc. |
| * |
| * 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.facebook.buck.java; |
| |
| import com.facebook.buck.rules.Sha1HashCode; |
| import com.facebook.buck.step.ExecutionContext; |
| import com.facebook.buck.step.Step; |
| import com.facebook.buck.util.ProjectFilesystem; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Charsets; |
| import com.google.common.base.Function; |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Optional; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| import com.google.common.io.Files; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.io.Writer; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| import javax.annotation.Nullable; |
| import javax.tools.Diagnostic; |
| import javax.tools.DiagnosticCollector; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| import javax.tools.StandardJavaFileManager; |
| import javax.tools.ToolProvider; |
| |
| public class JavacInMemoryStep implements Step { |
| |
| private final String pathToOutputDirectory; |
| |
| private final Set<String> javaSourceFilePaths; |
| |
| private final ImmutableSet<String> classpathEntries; |
| |
| private final JavacOptions javacOptions; |
| |
| private final Optional<String> pathToOutputAbiFile; |
| |
| @Nullable |
| private File abiKeyFile; |
| |
| @Nullable |
| private Sha1HashCode abiKey; |
| |
| /** |
| * Will be {@code true} once {@link #buildWithClasspath(ExecutionContext, Set)} has been invoked. |
| */ |
| private AtomicBoolean isExecuted = new AtomicBoolean(false); |
| |
| public JavacInMemoryStep( |
| String pathToOutputDirectory, |
| Set<String> javaSourceFilePaths, |
| Set<String> classpathEntries, |
| JavacOptions javacOptions, |
| Optional<String> pathToOutputAbiFile) { |
| Preconditions.checkNotNull(pathToOutputDirectory); |
| this.pathToOutputDirectory = pathToOutputDirectory; |
| this.javaSourceFilePaths = ImmutableSet.copyOf(javaSourceFilePaths); |
| this.classpathEntries = ImmutableSet.copyOf(classpathEntries); |
| this.javacOptions = Preconditions.checkNotNull(javacOptions); |
| this.pathToOutputAbiFile = Preconditions.checkNotNull(pathToOutputAbiFile); |
| } |
| |
| /** |
| * Returns a list of command-line options to pass to javac. These options reflect |
| * the configuration of this javac command. |
| * |
| * @param context the ExecutionContext with in which javac will run |
| * @return list of String command-line options. |
| */ |
| @VisibleForTesting |
| protected ImmutableList<String> getOptions(ExecutionContext context, |
| Set<String> buildClasspathEntries) { |
| ImmutableList.Builder<String> builder = ImmutableList.builder(); |
| |
| ProjectFilesystem filesystem = context.getProjectFilesystem(); |
| AnnotationProcessingDataDecorator decorator; |
| if (pathToOutputAbiFile.isPresent()) { |
| abiKeyFile = filesystem.getFileForRelativePath(pathToOutputAbiFile.get()); |
| decorator = new AbiWritingAnnotationProcessingDataDecorator(abiKeyFile); |
| } else { |
| decorator = AnnotationProcessingDataDecorators.identity(); |
| } |
| javacOptions.appendOptionsToList(builder, |
| context.getProjectFilesystem().getPathRelativizer(), |
| decorator); |
| |
| // verbose flag, if appropriate. |
| if (context.getVerbosity().shouldUseVerbosityFlagIfAvailable()) { |
| builder.add("-verbose"); |
| } |
| |
| // Specify the output directory. |
| Function<String, String> pathRelativizer = filesystem.getPathRelativizer(); |
| builder.add("-d").add(pathRelativizer.apply(pathToOutputDirectory)); |
| |
| // Build up and set the classpath. |
| if (!buildClasspathEntries.isEmpty()) { |
| String classpath = Joiner.on(File.pathSeparator).join( |
| Iterables.transform(buildClasspathEntries, pathRelativizer)); |
| builder.add("-classpath", classpath); |
| } |
| |
| return builder.build(); |
| } |
| |
| @Override |
| public final int execute(ExecutionContext context) { |
| try { |
| return executeBuild(context); |
| } finally { |
| isExecuted.set(true); |
| } |
| } |
| |
| protected int executeBuild(ExecutionContext context) { |
| return buildWithClasspath(context, getClasspathEntries()); |
| } |
| |
| protected int buildWithClasspath(ExecutionContext context, Set<String> buildClasspathEntries) { |
| JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); |
| Preconditions.checkNotNull(compiler, |
| "If using JRE instead of JDK, ToolProvider.getSystemJavaCompiler() may be null."); |
| StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null); |
| Iterable<? extends JavaFileObject> compilationUnits; |
| try { |
| compilationUnits = createCompilationUnits( |
| fileManager, context.getProjectFilesystem().getPathRelativizer()); |
| } catch (IOException e) { |
| e.printStackTrace(context.getStdErr()); |
| return 1; |
| } |
| |
| DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>(); |
| List<String> options = getOptions(context, buildClasspathEntries); |
| List<String> classNamesForAnnotationProcessing = ImmutableList.of(); |
| Writer compilerOutputWriter = new PrintWriter(context.getStdErr()); |
| JavaCompiler.CompilationTask compilationTask = compiler.getTask( |
| compilerOutputWriter, |
| fileManager, |
| diagnostics, |
| options, |
| classNamesForAnnotationProcessing, |
| compilationUnits); |
| |
| // Invoke the compilation and inspect the result. |
| boolean isSuccess = compilationTask.call(); |
| if (isSuccess) { |
| if (abiKeyFile != null) { |
| try { |
| String firstLine = Files.readFirstLine(abiKeyFile, Charsets.UTF_8); |
| if (firstLine != null) { |
| abiKey = new Sha1HashCode(firstLine); |
| } |
| } catch (IOException e) { |
| e.printStackTrace(context.getStdErr()); |
| return 1; |
| } |
| } |
| return 0; |
| } else { |
| if (context.getVerbosity().shouldPrintStandardInformation()) { |
| for (Diagnostic<? extends JavaFileObject> diagnostic : diagnostics.getDiagnostics()) { |
| context.getStdErr().println(diagnostic); |
| } |
| } |
| return 1; |
| } |
| } |
| |
| private Iterable<? extends JavaFileObject> createCompilationUnits( |
| StandardJavaFileManager fileManager, |
| Function<String, String> pathRelativizer) throws IOException { |
| List<JavaFileObject> compilationUnits = Lists.newArrayList(); |
| for (String path : javaSourceFilePaths) { |
| if (path.endsWith(".java")) { |
| // For an ordinary .java file, create a corresponding JavaFileObject. |
| Iterable<? extends JavaFileObject> javaFileObjects = fileManager.getJavaFileObjects( |
| pathRelativizer.apply(path)); |
| compilationUnits.add(Iterables.getOnlyElement(javaFileObjects)); |
| } else if (path.endsWith(".src.zip")) { |
| // For a Zip of .java files, create a JavaFileObject for each .java entry. |
| ZipFile zipFile = new ZipFile(pathRelativizer.apply(path)); |
| for (Enumeration<? extends ZipEntry> entries = zipFile.entries(); |
| entries.hasMoreElements(); |
| ) { |
| ZipEntry entry = entries.nextElement(); |
| if (!entry.getName().endsWith(".java")) { |
| continue; |
| } |
| |
| compilationUnits.add(new ZipEntryJavaFileObject(zipFile, entry)); |
| } |
| } |
| } |
| return compilationUnits; |
| } |
| |
| @Override |
| public String getDescription(ExecutionContext context) { |
| StringBuilder builder = new StringBuilder("javac "); |
| Joiner.on(" ").appendTo(builder, getOptions(context, getClasspathEntries())); |
| builder.append(" "); |
| Joiner.on(" ").appendTo(builder, javaSourceFilePaths); |
| |
| return builder.toString(); |
| } |
| |
| @Override |
| public String getShortName() { |
| return "javac"; |
| } |
| |
| public Set<String> getSrcs() { |
| return javaSourceFilePaths; |
| } |
| |
| /** |
| * @return The classpath entries used to invoke javac. |
| */ |
| protected ImmutableSet<String> getClasspathEntries() { |
| return classpathEntries; |
| } |
| |
| /** |
| * Returns a SHA-1 hash for the ABI of the Java code compiled by this step. |
| * <p> |
| * In order for this method to return a non-null value, it must be invoked after |
| * {@link #buildWithClasspath(ExecutionContext, Set)}, which must have completed successfully |
| * (i.e., returned with an exit code of 0). |
| */ |
| @Nullable |
| public Sha1HashCode getAbiKey() { |
| Preconditions.checkState(isExecuted.get(), "Must execute step before requesting AbiKey."); |
| // Note that if the rule fails, isExecuted should still be set, but abiKey will be null. |
| return abiKey; |
| } |
| } |