Remove code that requires whole-program compile

lib/src/codegen/code_generator.dart

-// Copyright (c) 2015, 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.
-
-import 'package:analyzer/dart/element/element.dart'
-    show CompilationUnitElement, LibraryElement;
-import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
-import 'package:path/path.dart' as path;
-
-import '../compiler.dart' show AbstractCompiler;
-import '../info.dart';
-import '../utils.dart' show canonicalLibraryName;
-import '../options.dart' show CodegenOptions;
-
-abstract class CodeGenerator {
-  final AbstractCompiler compiler;
-  final AnalysisContext context;
-  final CodegenOptions options;
-
-  CodeGenerator(AbstractCompiler compiler)
-      : compiler = compiler,
-        context = compiler.context,
-        options = compiler.options.codegenOptions;
-
-  /// Return a hash, if any, that can be used for caching purposes. When two
-  /// invocations to this function return the same hash, the underlying
-  /// code-generator generated the same code.
-  String generateLibrary(LibraryUnit unit);
-
-  static List<String> _searchPaths = () {
-    // TODO(vsm): Can we remove redundancy with multi_package_resolver logic?
-    var packagePaths =
-        new String.fromEnvironment('package_paths', defaultValue: null);
-    if (packagePaths == null) return null;
-    var list = packagePaths.split(',');
-    // Normalize the paths.
-    list = new List<String>.from(list.map(_dirToPrefix));
-    // The current directory is implicitly in the search path.
-    list.add(_dirToPrefix(path.current));
-    // Sort by reverse length to prefer longer prefixes.
-    // This ensures that we get the minimum valid suffix.  E.g., if we have:
-    // - root/
-    // - root/generated/
-    // in our search path, and the path "root/generated/foo/bar.dart", we'll
-    // compute "foo/bar.dart" instead of "generated/foo/bar.dart" in the search
-    // below.
-    list.sort((s1, s2) => s2.length - s1.length);
-    return list;
-  }() as List<String>;
-
-  static String _dirToPrefix(String dir) {
-    dir = path.absolute(dir);
-    dir = path.normalize(dir);
-    if (!dir.endsWith(path.separator)) {
-      dir = dir + path.separator;
-    }
-    return dir;
-  }
-
-  static String _convertIfPackage(String dir) {
-    assert(path.isRelative(dir));
-    var parts = path.split(dir);
-    var index = parts.indexOf('lib');
-    if (index < 0) {
-      // Not a package.
-      return dir;
-    }
-    // This is a package.
-    // Convert: foo/bar/lib/baz/hi
-    // to: packages/foo.bar/baz/hi
-    var packageName = parts.sublist(0, index).join('.');
-    var prefix = path.join('packages', packageName);
-    var suffix = path.joinAll(parts.sublist(index + 1));
-    return path.join(prefix, suffix);
-  }
-
-  static String _getOutputDirectory(
-      String name, CompilationUnitElement unitElement) {
-    var uri = unitElement.source.uri.toString();
-    String suffix;
-    if (uri.startsWith('dart:') || _searchPaths == null) {
-      // Use the library name as the directory.
-      suffix = name;
-    } else if (uri.startsWith('package:')) {
-      suffix = uri.replaceFirst('package:', 'packages/');
-      suffix = path.dirname(suffix);
-    } else {
-      // Recover the original search path and use the relative path
-      // from there as the directory.
-      // TODO(vsm): Is there a better way to get the resolved path?
-      var resolvedPath = unitElement.toString();
-      var resolvedDir = path.dirname(resolvedPath);
-      for (var prefix in _searchPaths) {
-        if (resolvedDir.startsWith(prefix)) {
-          suffix = resolvedDir.substring(prefix.length);
-          break;
-        }
-      }
-    }
-    assert(suffix != null);
-    assert(path.isRelative(suffix));
-    return _convertIfPackage(suffix);
-  }
-
-  static Uri uriFor(LibraryElement lib) {
-    var unitElement = lib.definingCompilationUnit;
-    var uri = unitElement.source.uri;
-    if (uri.scheme == 'dart') return uri;
-    if (uri.scheme == 'package') return uri;
-    var suffix = _getOutputDirectory(canonicalLibraryName(lib), unitElement);
-    suffix = path.join(suffix, uri.pathSegments.last);
-    var parts = path.split(suffix);
-    var index = parts.indexOf('packages');
-    if (index < 0) {
-      // Not a package.
-      // TODO(leafp) These may need to be adjusted
-      // relative to the import location
-      return new Uri(path: suffix);
-    }
-    assert(index == 0);
-    return new Uri(
-        scheme: 'package', path: path.joinAll(parts.sublist(index + 1)));
-  }
-}