com.facebook.buck.java.JavacOptionsUtil.java Source code

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Here is the source code for com.facebook.buck.java.JavacOptionsUtil.java

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/*
 * 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.model.AnnotationProcessingData;
import com.facebook.buck.step.ExecutionContext;
import com.google.common.annotations.Beta;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableList;

import java.io.File;
import java.util.Set;

@Beta
public final class JavacOptionsUtil {

    public static final String DEFAULT_SOURCE_LEVEL = "6";
    public static final String DEFAULT_TARGET_LEVEL = "6";

    /** Utility class: do not instantiate. */
    private JavacOptionsUtil() {
    }

    /**
     * Adds the appropriate options for javac given the specified {@link com.facebook.buck.step.ExecutionContext}.
     */
    static void addOptions(ImmutableList.Builder<String> optionsBuilder, ExecutionContext context,
            File outputDirectory, Set<String> classpathEntries, Supplier<String> bootclasspathSupplier,
            AnnotationProcessingData annotationProcessingData, String sourceLevel, String targetLevel) {
        Preconditions.checkNotNull(optionsBuilder);
        Preconditions.checkNotNull(context);
        Preconditions.checkNotNull(outputDirectory);
        Preconditions.checkNotNull(classpathEntries);
        Preconditions.checkNotNull(bootclasspathSupplier);
        Preconditions.checkNotNull(annotationProcessingData);
        Preconditions.checkNotNull(sourceLevel);
        Preconditions.checkNotNull(targetLevel);

        // verbose flag, if appropriate.
        if (context.getVerbosity().shouldUseVerbosityFlagIfAvailable()) {
            optionsBuilder.add("-verbose");
        }

        // Add some standard options.
        optionsBuilder.add("-target", sourceLevel);
        optionsBuilder.add("-source", targetLevel);

        // Include all debug information. Let Proguard be responsible for stripping it from production
        // builds.
        optionsBuilder.add("-g");

        // Specify the output directory.
        optionsBuilder.add("-d").add(outputDirectory.getAbsolutePath());

        // Override the bootclasspath if Buck is building Java code for Android.
        String bootclasspath = bootclasspathSupplier.get();
        if (bootclasspath != null) {
            optionsBuilder.add("-bootclasspath", bootclasspath);
        }

        // Build up and set the classpath.
        if (!classpathEntries.isEmpty()) {
            String classpath = Joiner.on(":").join(classpathEntries);
            optionsBuilder.add("-classpath", classpath);
        }

        // Add annotation processors.
        if (!annotationProcessingData.isEmpty()) {

            // Specify where to generate sources so IntelliJ can pick them up.
            String generateTo = annotationProcessingData.getGeneratedSourceFolderName();
            if (generateTo != null) {
                optionsBuilder.add("-s").add(generateTo);
            }

            // Specify processorpath to search for processors.
            optionsBuilder.add("-processorpath",
                    Joiner.on(':').join(annotationProcessingData.getSearchPathElements()));

            // Specify names of processors.
            if (!annotationProcessingData.getNames().isEmpty()) {
                optionsBuilder.add("-processor", Joiner.on(',').join(annotationProcessingData.getNames()));
            }

            // Add processor parameters.
            for (String parameter : annotationProcessingData.getParameters()) {
                optionsBuilder.add("-A" + parameter);
            }

            if (annotationProcessingData.getProcessOnly()) {
                optionsBuilder.add("-proc:only");
            }
        }
    }
}