Remove frog dependencies from lib/compiler.

lib/compiler/implementation/frog_leg.dart

-// Copyright (c) 2012, 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.
-
-#library('frog_leg');
-
-#import('dart:io');
-
-#import('../../uri/uri.dart');
-#import('source_file.dart');
-#import('../../../frog/lang.dart', prefix: 'frog');
-#import('../compiler.dart', prefix: 'compiler');
-
-String relativize(Uri base, Uri uri) {
-  if (base.scheme == 'file' &&
-      base.scheme == uri.scheme &&
-      base.userInfo == uri.userInfo &&
-      base.domain == uri.domain &&
-      base.port == uri.port &&
-      uri.query == "" && uri.fragment == "") {
-    if (uri.path.startsWith(base.path)) {
-      return uri.path.substring(base.path.length);
-    }
-    List<String> uriParts = uri.path.split('/');
-    List<String> baseParts = base.path.split('/');
-    int common = 0;
-    int length = Math.min(uriParts.length, baseParts.length);
-    while (common < length && uriParts[common] == baseParts[common]) {
-      common++;
-    }
-    StringBuffer sb = new StringBuffer();
-    for (int i = common + 1; i < baseParts.length; i++) {
-      sb.add('../');
-    }
-    for (int i = common; i < uriParts.length - 1; i++) {
-      sb.add('${uriParts[i]}/');
-    }
-    sb.add('${uriParts.last()}');
-    return sb.toString();
-  }
-  return uri.toString();
-}
-
-bool compile(frog.World world) {
-  final throwOnError = frog.options.throwOnErrors;
-  final showWarnings = frog.options.showWarnings;
-  final allowMockCompilation = frog.options.allowMockCompilation;
-  Uri cwd = new Uri(scheme: 'file', path: getCurrentDirectory());
-  Uri uri = cwd.resolve(frog.options.dartScript);
-  String frogLibDir = frog.options.libDir;
-  if (!frogLibDir.endsWith("/")) frogLibDir = "$frogLibDir/";
-  Uri frogLib = new Uri(scheme: 'file', path: frogLibDir);
-  Uri libraryRoot = frogLib.resolve('../../');
-  Map<String, SourceFile> sourceFiles = <SourceFile>{};
-
-  Future<String> provider(Uri uri) {
-    if (uri.scheme != 'file') {
-      throw new IllegalArgumentException(uri);
-    }
-    String source = world.files.readAll(uri.path);
-    world.dartBytesRead += source.length;
-    sourceFiles[uri.toString()] =
-      new SourceFile(relativize(cwd, uri), source);
-    Completer<String> completer = new Completer<String>();
-    completer.complete(source);
-    return completer.future;
-  }
-
-  void handler(Uri uri, int begin, int end, String message, bool fatal) {
-    if (uri === null && !fatal) {
-      world.info('[leg] $message');
-      return;
-    }
-    if (uri === null) {
-      assert(fatal);
-      print(message);
-    } else if (fatal || showWarnings) {
-      SourceFile file = sourceFiles[uri.toString()];
-      print(file.getLocationMessage(message, begin, end, true));
-    }
-    if (fatal && throwOnError) throw new AbortLeg(message);
-  }
-
-  List<String> options = new List<String>();
-  if (allowMockCompilation) options.add('--allow-mock-compilation');
-
-  // TODO(ahe): We expect the future to be complete and call value
-  // directly. In effect, we don't support truly asynchronous API.
-  String code =
-    compiler.compile(uri, libraryRoot, provider, handler, options).value;
-  if (code === null) return false;
-  world.legCode = code;
-  world.jsBytesWritten = code.length;
-  return true;
-}
-
-class AbortLeg {
-  final message;
-  AbortLeg(this.message);
-  toString() => 'Aborted due to --throw-on-error: $message';
-}
-
-String getCurrentDirectory() {
-  String dir = new File(".").fullPathSync();
-  if (dir.endsWith("/")) return dir;
-  return "$dir/";
-}