CompilationServer.java example

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eclipse3-master
/*
 * Copyright (c) 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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.dart.tools.debug.core.util;

import com.google.dart.engine.element.LibraryElement;
import com.google.dart.tools.core.DartCore;
import com.google.dart.tools.core.DartCoreDebug;
import com.google.dart.tools.core.MessageConsole;
import com.google.dart.tools.core.dart2js.Dart2JSCompiler;
import com.google.dart.tools.core.dart2js.Dart2JSCompiler.CompilationResult;
import com.google.dart.tools.debug.core.DartDebugCorePlugin;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;

import java.io.File;
import java.io.IOException;

/**
 * A compilation server for Dart code.
 */
public class CompilationServer {
  private static CompilationServer server = new CompilationServer();

  public static CompilationServer getServer() {
    return server;
  }

  private CompilationServer() {

  }

  public void recompileJavaScriptArtifact(File jsFile) {
    if (DartCoreDebug.ENABLE_ANALYSIS_SERVER) {
      // TODO(scheglov) this class is not used at all. Remove it?
      return;
    }
    String dartName = jsFile.getName();
    dartName = dartName.substring(0, dartName.length() - ".js".length());

    // Is there a .dart file?
    IPath jsPath = Path.fromOSString(jsFile.getPath());
    IPath dartPath = jsPath.removeLastSegments(1).append(dartName);
    File dartFile = dartPath.toFile();

    if (dartFile.exists()) {
      // Is it a library?
      IFile[] resources = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(
          dartFile.toURI());

      if (resources.length > 0) {
        IFile dartResource = resources[0];

        LibraryElement library = DartCore.getProjectManager().getLibraryElement(dartResource);

        if (library != null && !library.isUpToDate(jsFile.lastModified())) {
          // Recompile it.
          compile(dartResource, jsFile);
        }
      }
    }
  }

  private void compile(IFile dartFile, File outFile) {
    MessageConsole console = DartCore.getConsole();
    try {
      IPath inputPath = dartFile.getLocation();
      IPath outputPath = Path.fromOSString(outFile.getPath());

      Dart2JSCompiler compiler = new Dart2JSCompiler();
      compiler.setSuppressWarnings(true);

      console.printSeparator("Compiling " + dartFile.getFullPath() + "...");

      CompilationResult result = compiler.compile(
          inputPath,
          outputPath,
          new NullProgressMonitor(),
          console);

      String output = result.getAllOutput();

      if (output.length() > 0) {
        console.println(output);
      }
    } catch (IOException ex) {
      console.println("Error while compiling: " + ex.toString());

      DartDebugCorePlugin.logError(ex);
    }
  }

}