Introducing `IdeOptions`.

pkg/analysis_server/lib/src/server_options.dart

Index: pkg/analysis_server/lib/src/server_options.dart
diff --git a/pkg/analysis_server/lib/src/server_options.dart b/pkg/analysis_server/lib/src/server_options.dart
deleted file mode 100644
index 2eff6d9d4c403c38996ebdd879efb3dbd8492212..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/lib/src/server_options.dart
+++ /dev/null
@@ -1,118 +0,0 @@
-// 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.
-
-library analysis_server.src.server_options;
-
-import 'dart:collection';
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
-import 'package:yaml/yaml.dart';
-
-//TODO: consider renaming (https://github.com/dart-lang/sdk/issues/23927)
-const _optionsFileName = '.dart_analysis_server.yaml';
-
-/// The shared options instance.
-ServerOptions _serverOptions;
-
-/// Server options.
-ServerOptions get serverOptions {
-  if (_serverOptions == null) {
-    _serverOptions = _loadOptions();
-  }
-  return _serverOptions;
-}
-
-/// Find the options file relative to the user's home directory.
-/// Returns `null` if there is none or the user's homedir cannot
-/// be derived from the platform's environment (e.g., `HOME` and
-/// `UserProfile` for mac/Linux and Windows respectively).
-File _findOptionsFile() {
-  String home;
-  Map<String, String> envVars = Platform.environment;
-  if (Platform.isMacOS || Platform.isLinux) {
-    home = envVars['HOME'];
-  } else if (Platform.isWindows) {
-    home = envVars['UserProfile'];
-  }
-
-  if (home == null) {
-    return null;
-  }
-
-  return new File(path.context.join(home, _optionsFileName));
-}
-
-ServerOptions _loadOptions() {
-  File optionsFile = _findOptionsFile();
-  try {
-    if (optionsFile != null && optionsFile.existsSync()) {
-      return new ServerOptions.fromFile(optionsFile);
-    }
-  } catch (e) {
-    // Fall through.
-  }
-  return new ServerOptions._empty();
-}
-
-/// Describes options captured in an external options file.
-/// `ServerOptions` are described in a file `dart_analysis_server.options`
-/// located in the user's home directory. Options are defined in YAML and
-/// read once and cached. In order for changes to be picked up, server needs
-/// to be restarted.
-class ServerOptions {
-  final Map<String, dynamic> _options = new HashMap<String, dynamic>();
-
-  /// Load options from the given [contents].
-  ServerOptions.fromContents(String contents) {
-    _readOptions(contents);
-  }
-
-  /// Load options from the given [options] file.
-  factory ServerOptions.fromFile(File options) =>
-      new ServerOptions.fromContents(options.readAsStringSync());
-
-  /// Create an empty options object.
-  ServerOptions._empty();
-
-  /// Get the value for `key` from the options file.
-  dynamic operator [](String key) => _options[key];
-
-  /// Get a String value for this `key` or [defaultValue] if undefined
-  /// or not a String.
-  String getStringValue(String key, {String defaultValue: null}) {
-    var value = _options[key];
-    if (value is String) {
-      return value;
-    }
-    return defaultValue;
-  }
-
-  /// Test whether the given [booleanPropertyKey] is set to the value `true`,
-  /// falling back to [defaultValue] if undefined.
-  /// For example:
-  ///     myDebugOption1:true
-  ///     myDebugOption2:TRUE # Also true (case and trailing whitespace are ignored).
-  ///     myDebugOption3:false
-  ///     myDebugOption4:off  # Treated as `false`.
-  ///     myDebugOption5:on   # Also read as `false`.
-  bool isSet(String booleanPropertyKey, {bool defaultValue: false}) {
-    var value = _options[booleanPropertyKey];
-    if (value == null) {
-      return defaultValue;
-    }
-    return value == true;
-  }
-
-  void _readOptions(String contents) {
-    var doc = loadYaml(contents);
-    if (doc is YamlMap) {
-      doc.forEach((k, v) {
-        if (k is String) {
-          _options[k] = v;
-        }
-      });
-    }
-  }
-}