Removes dependency on v8 from dartc testing

compiler/java/com/google/dart/runner/V8Launcher.java

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-package com.google.dart.runner;
-
-import com.google.common.collect.Lists;
-
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.PrintStream;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-/**
- * Runs a given JS-script in d8 (part of V8).
- */
-public class V8Launcher implements JavaScriptLauncher {
-  private static class Drainer implements Runnable {
-    private final InputStream stream;
-    private final List<String> lines;
-    private final PrintStream out;
-
-    public Drainer(InputStream stream, PrintStream out, List<String> lines) {
-      this.stream = stream;
-      this.lines = lines;
-      this.out = out;
-    }
-
-    @Override
-    public void run() {
-      BufferedReader r = new BufferedReader(new InputStreamReader(stream));
-      String str;
-      try {
-        while ((str = r.readLine()) != null) {
-          if (lines != null) {
-            lines.add(str);
-          }
-          out.println(str);
-        }
-      } catch (IOException e) {
-        throw new AssertionError(e);
-      }
-    }
-  }
-
-  private static final String D8_ENVIRONMENT_VARIABLE = "D8_EXEC";
-
-  private static final String EOL = System.getProperty("line.separator");
-
-  public V8Launcher() {
-  }
-
-  @Override
-  public void execute(String jsScript, String sourceName, String[] args, RunnerOptions options,
-                      PrintStream stdout, PrintStream stderr)
-      throws RunnerError {
-    if (!isConfigured()) {
-      throw new RunnerError("Please set the " + D8_ENVIRONMENT_VARIABLE + " environment variable.");
-    }
-    File sourceFile;
-    try {
-      sourceFile = writeTempFile(sourceName, jsScript);
-    } catch (IOException e) {
-      throw new RunnerError(e);
-    }
-    try {
-      ArrayList<String> command = new ArrayList<String>();
-      command.add(v8Executable().getAbsolutePath());
-      command.add(sourceFile.getAbsolutePath());
-      if (options.shouldProfile()) {
-        command.add("--prof");
-      }
-      command.add("--");
-      command.addAll(Arrays.asList(args));
-      int exitValue;
-      Process p = null;
-      List<String> stdOutLines = Lists.newArrayList();
-      Thread stdOutDrain = null;
-      Thread stdErrDrain = null;
-      try {
-        p = Runtime.getRuntime().exec(command.toArray(new String[0]));
-        // TODO(floitsch): we should handle timeouts (but how long should we wait?).
-        stdOutDrain = new Thread(new Drainer(p.getInputStream(), stdout, stdOutLines));
-        stdErrDrain = new Thread(new Drainer(p.getErrorStream(), stderr, null));
-        stdOutDrain.start();
-        stdErrDrain.start();
-        try {
-          exitValue = p.waitFor();
-        } catch (InterruptedException e) {
-          throw new RuntimeException(e);
-        }
-      } catch (IOException e) {
-        throw new RunnerError(e);
-      } finally {
-        try {
-          if (stdOutDrain != null) {
-            stdOutDrain.join();
-          }
-          if (stdErrDrain != null) {
-            stdErrDrain.join();
-          }
-        } catch (InterruptedException e) {
-          throw new RuntimeException(e);
-        }
-        try {
-          p.getInputStream().close();
-          p.getOutputStream().close();
-          p.getOutputStream().close();
-        } catch (IOException e) {
-          throw new RunnerError(e);
-        }
-        p.destroy();
-      }
-      if (exitValue != 0) {
-        StringWriter stringWriter = new StringWriter();
-        PrintWriter out = new PrintWriter(stringWriter);
-        if (options.verbose()) {
-          out.println(jsScript);
-        }
-        out.println("Execution failed.");
-
-        out.println("V8 execution returned non-zero exit-code: " + p.exitValue());
-        out.flush();
-        throw new RunnerError(stringWriter.toString());
-      }
-    } finally {
-      sourceFile.delete();
-    }
-  }
-
-  private File writeTempFile(String name, String content) throws IOException {
-    // The first argument to createTempFile must be at least three characters long, and be a
-    // valid file-name.
-    name = name.replace('/', '_');
-    File file = File.createTempFile("dart_" + name, ".js");
-    FileWriter writer = new FileWriter(file);
-    try {
-      writer.write(content);
-    } finally {
-      writer.close();
-    }
-    return file;
-  }
-
-  private static File v8Executable() {
-    String d8Path = System.getProperty("com.google.dart.runner.d8",
-                                       System.getenv(D8_ENVIRONMENT_VARIABLE));
-    if (d8Path == null) {
-      String testSrcDir = System.getenv("TEST_SRCDIR");
-      if (testSrcDir == null) {
-        return null;
-      }
-      return new File(new File(new File(new File(testSrcDir, "google3"),
-                                        "third_party"), "v8"), "d8");
-    } else {
-      return new File(d8Path);
-    }
-  }
-
-  /**
-   * @return true if the D8_EXEC environment variable is correctly set up.
-   */
-  public static boolean isConfigured() {
-    File file = v8Executable();
-    if (file == null) {
-      return false;
-    }
-    return file.canExecute();
-  }
-}