packages/flutter_tools/lib/src/doctor.dart - mirrors/flutter - Git at Google

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 import 'dart:async';
 import 'dart:convert' show UTF8;

 import 'package:archive/archive.dart';

 import 'android/android_studio_validator.dart';
 import 'android/android_workflow.dart';
 import 'artifacts.dart';
 import 'base/common.dart';
 import 'base/context.dart';
 import 'base/file_system.dart';
 import 'base/os.dart';
 import 'base/platform.dart';
 import 'base/process_manager.dart';
 import 'base/version.dart';
 import 'cache.dart';
 import 'device.dart';
 import 'globals.dart';
 import 'ios/ios_workflow.dart';
 import 'ios/plist_utils.dart';
 import 'version.dart';

 Doctor get doctor => context[Doctor];

 class Doctor {
   List<DoctorValidator> _validators;

   List<DoctorValidator> get validators {
     if (_validators == null) {
       _validators = <DoctorValidator>[];
       _validators.add(new _FlutterValidator());

       if (androidWorkflow.appliesToHostPlatform)
         _validators.add(androidWorkflow);

       if (iosWorkflow.appliesToHostPlatform)
         _validators.add(iosWorkflow);

       final List<DoctorValidator> ideValidators = <DoctorValidator>[];
       ideValidators.addAll(AndroidStudioValidator.allValidators);
       ideValidators.addAll(IntelliJValidator.installedValidators);
       if (ideValidators.isNotEmpty)
         _validators.addAll(ideValidators);
       else
         _validators.add(new NoIdeValidator());

       if (deviceManager.canListAnything)
         _validators.add(new DeviceValidator());
     }
     return _validators;
   }

   List<Workflow> get workflows {
     return new List<Workflow>.from(validators.where((DoctorValidator validator) => validator is Workflow));
   }

   /// Print a summary of the state of the tooling, as well as how to get more info.
   Future<Null> summary() async {
     printStatus(await summaryText);
   }

   Future<String> get summaryText async {
     final StringBuffer buffer = new StringBuffer();

     bool allGood = true;

     for (DoctorValidator validator in validators) {
       final ValidationResult result = await validator.validate();
       buffer.write('${result.leadingBox} ${validator.title} is ');
       if (result.type == ValidationType.missing)
         buffer.write('not installed.');
       else if (result.type == ValidationType.partial)
         buffer.write('partially installed; more components are available.');
       else
         buffer.write('fully installed.');

       if (result.statusInfo != null)
         buffer.write(' (${result.statusInfo})');

       buffer.writeln();

       if (result.type != ValidationType.installed)
         allGood = false;
     }

     if (!allGood) {
       buffer.writeln();
       buffer.writeln('Run "flutter doctor" for information about installing additional components.');
     }

     return buffer.toString();
   }

   /// Print verbose information about the state of installed tooling.
   Future<bool> diagnose({ bool androidLicenses: false }) async {
     if (androidLicenses)
       return AndroidWorkflow.runLicenseManager();

     bool doctorResult = true;

     for (DoctorValidator validator in validators) {
       final ValidationResult result = await validator.validate();

       if (result.type == ValidationType.missing)
         doctorResult = false;

       if (result.statusInfo != null)
         printStatus('${result.leadingBox} ${validator.title} (${result.statusInfo})');
       else
         printStatus('${result.leadingBox} ${validator.title}');

       for (ValidationMessage message in result.messages) {
         final String text = message.message.replaceAll('\n', '\n      ');
         if (message.isError) {
           printStatus('    ✗ $text', emphasis: true);
         } else {
           printStatus('    • $text');
         }
       }

       printStatus('');
     }

     return doctorResult;
   }

   bool get canListAnything => workflows.any((Workflow workflow) => workflow.canListDevices);

   bool get canLaunchAnything => workflows.any((Workflow workflow) => workflow.canLaunchDevices);
 }

 /// A series of tools and required install steps for a target platform (iOS or Android).
 abstract class Workflow {
   /// Whether the workflow applies to this platform (as in, should we ever try and use it).
   bool get appliesToHostPlatform;

   /// Are we functional enough to list devices?
   bool get canListDevices;

   /// Could this thing launch *something*? It may still have minor issues.
   bool get canLaunchDevices;
 }

 enum ValidationType {
   missing,
   partial,
   installed
 }

 abstract class DoctorValidator {
   DoctorValidator(this.title);

   final String title;

   Future<ValidationResult> validate();
 }

 class ValidationResult {
   ValidationResult(this.type, this.messages, { this.statusInfo });

   final ValidationType type;
   // A short message about the status.
   final String statusInfo;
   final List<ValidationMessage> messages;

   String get leadingBox {
     if (type == ValidationType.missing)
       return '[✗]';
     else if (type == ValidationType.installed)
       return '[✓]';
     else
       return '[-]';
   }
 }

 class ValidationMessage {
   ValidationMessage(this.message) : isError = false;
   ValidationMessage.error(this.message) : isError = true;

   final bool isError;
   final String message;

   @override
   String toString() => message;
 }

 class _FlutterValidator extends DoctorValidator {
   _FlutterValidator() : super('Flutter');

   @override
   Future<ValidationResult> validate() async {
     final List<ValidationMessage> messages = <ValidationMessage>[];
     ValidationType valid = ValidationType.installed;

     final FlutterVersion version = FlutterVersion.instance;

     messages.add(new ValidationMessage('Flutter version ${version.frameworkVersion} at ${Cache.flutterRoot}'));
     if (Cache.flutterRoot.contains(' '))
       messages.add(new ValidationMessage.error(
         'Flutter SDK install paths with spaces are not yet supported. (https://github.com/flutter/flutter/issues/6577)\n'
         'Please move the SDK to a path that does not include spaces.'));
     messages.add(new ValidationMessage(
       'Framework revision ${version.frameworkRevisionShort} '
       '(${version.frameworkAge}), ${version.frameworkDate}'
     ));
     messages.add(new ValidationMessage('Engine revision ${version.engineRevisionShort}'));
     messages.add(new ValidationMessage('Tools Dart version ${version.dartSdkVersion}'));
     messages.add(new ValidationMessage('Engine Dart version ${version.engineDartVersion}'));
     final String genSnapshotPath =
       artifacts.getArtifactPath(Artifact.genSnapshot);

     // Check that the binaries we downloaded for this platform actually run on it.
     if (!_genSnapshotRuns(genSnapshotPath)) {
       messages.add(new ValidationMessage.error('Downloaded executables cannot execute '
           'on host (see https://github.com/flutter/flutter/issues/6207 for more information)'));
       valid = ValidationType.partial;
     }

     return new ValidationResult(valid, messages,
       statusInfo: 'on ${os.name}, locale ${platform.localeName}, channel ${version.channel}');
   }
 }

 bool _genSnapshotRuns(String genSnapshotPath) {
   final int kExpectedExitCode = 255;
   try {
     return processManager.runSync(<String>[genSnapshotPath]).exitCode == kExpectedExitCode;
   } catch (error) {
     return false;
   }
 }

 class NoIdeValidator extends DoctorValidator {
   NoIdeValidator() : super('Flutter IDE Support');

   @override
   Future<ValidationResult> validate() async {
     return new ValidationResult(ValidationType.missing, <ValidationMessage>[
       new ValidationMessage('IntelliJ - https://www.jetbrains.com/idea/'),
     ], statusInfo: 'No supported IDEs installed');
   }
 }

 abstract class IntelliJValidator extends DoctorValidator {
   IntelliJValidator(String title) : super(title);

   String get version;
   String get pluginsPath;

   static final Map<String, String> _idToTitle = <String, String>{
     'IntelliJIdea' : 'IntelliJ IDEA Ultimate Edition',
     'IdeaIC' : 'IntelliJ IDEA Community Edition',
   };

   static final Version kMinIdeaVersion = new Version(2017, 1, 0);
   static final Version kMinFlutterPluginVersion = new Version(16, 0, 0);

   static Iterable<DoctorValidator> get installedValidators {
     if (platform.isLinux || platform.isWindows)
       return IntelliJValidatorOnLinuxAndWindows.installed;
     if (platform.isMacOS)
       return IntelliJValidatorOnMac.installed;
     return <DoctorValidator>[];
   }

   @override
   Future<ValidationResult> validate() async {
     final List<ValidationMessage> messages = <ValidationMessage>[];

     _validatePackage(messages, <String>['flutter-intellij', 'flutter-intellij.jar'],
         'Flutter', minVersion: kMinFlutterPluginVersion);
     _validatePackage(messages, <String>['Dart'], 'Dart');

     if (_hasIssues(messages)) {
       messages.add(new ValidationMessage(
         'For information about installing plugins, see\n'
         'https://flutter.io/intellij-setup/#installing-the-plugins'
       ));
     }

     _validateIntelliJVersion(messages, kMinIdeaVersion);

     return new ValidationResult(
       _hasIssues(messages) ? ValidationType.partial : ValidationType.installed,
       messages,
       statusInfo: 'version $version'
     );
   }

   bool _hasIssues(List<ValidationMessage> messages) {
     return messages.any((ValidationMessage message) => message.isError);
   }

   void _validateIntelliJVersion(List<ValidationMessage> messages, Version minVersion) {
     // Ignore unknown versions.
     if (minVersion == Version.unknown)
       return;

     final Version installedVersion = new Version.parse(version);
     if (installedVersion == null)
       return;

     if (installedVersion < minVersion) {
       messages.add(new ValidationMessage.error(
         'This install is older than the minimum recommended version of $minVersion.'
       ));
     }
   }

   void _validatePackage(List<ValidationMessage> messages, List<String> packageNames, String title, {
     Version minVersion
   }) {
     for (String packageName in packageNames) {
       if (!hasPackage(packageName)) {
         continue;
       }

       final String versionText = _readPackageVersion(packageName);
       final Version version = new Version.parse(versionText);
       if (version != null && minVersion != null && version < minVersion) {
         messages.add(new ValidationMessage.error(
           '$title plugin version $versionText - the recommended minimum version is $minVersion'
         ));
       } else {
         messages.add(new ValidationMessage(
           '$title plugin ${version != null ? "version $version" : "installed"}'
         ));
       }

       return;
     }

     messages.add(new ValidationMessage.error(
       '$title plugin not installed; this adds $title specific functionality.'
     ));
   }

   String _readPackageVersion(String packageName) {
     final String jarPath = packageName.endsWith('.jar')
         ? fs.path.join(pluginsPath, packageName)
         : fs.path.join(pluginsPath, packageName, 'lib', '$packageName.jar');
     // TODO(danrubel) look for a better way to extract a single 2K file from the zip
     // rather than reading the entire file into memory.
     try {
       final Archive archive = new ZipDecoder().decodeBytes(fs.file(jarPath).readAsBytesSync());
       final ArchiveFile file = archive.findFile('META-INF/plugin.xml');
       final String content = UTF8.decode(file.content);
       final String versionStartTag = '<version>';
       final int start = content.indexOf(versionStartTag);
       final int end = content.indexOf('</version>', start);
       return content.substring(start + versionStartTag.length, end);
     } catch (_) {
       return null;
     }
   }

   bool hasPackage(String packageName) {
     final String packagePath = fs.path.join(pluginsPath, packageName);
     if (packageName.endsWith('.jar'))
       return fs.isFileSync(packagePath);
     return fs.isDirectorySync(packagePath);
   }
 }

 class IntelliJValidatorOnLinuxAndWindows extends IntelliJValidator {
   IntelliJValidatorOnLinuxAndWindows(String title, this.version, this.installPath, this.pluginsPath) : super(title);

   @override
   String version;

   final String installPath;

   @override
   String pluginsPath;

   static Iterable<DoctorValidator> get installed {
     final List<DoctorValidator> validators = <DoctorValidator>[];
     if (homeDirPath == null)
       return validators;

     void addValidator(String title, String version, String installPath, String pluginsPath) {
       final IntelliJValidatorOnLinuxAndWindows validator =
         new IntelliJValidatorOnLinuxAndWindows(title, version, installPath, pluginsPath);
       for (int index = 0; index < validators.length; ++index) {
         final DoctorValidator other = validators[index];
         if (other is IntelliJValidatorOnLinuxAndWindows && validator.installPath == other.installPath) {
           if (validator.version.compareTo(other.version) > 0)
             validators[index] = validator;
           return;
         }
       }
       validators.add(validator);
     }

     for (FileSystemEntity dir in fs.directory(homeDirPath).listSync()) {
       if (dir is Directory) {
         final String name = fs.path.basename(dir.path);
         IntelliJValidator._idToTitle.forEach((String id, String title) {
           if (name.startsWith('.$id')) {
             final String version = name.substring(id.length + 1);
             String installPath;
             try {
               installPath = fs.file(fs.path.join(dir.path, 'system', '.home')).readAsStringSync();
             } catch (e) {
               // ignored
             }
             if (installPath != null && fs.isDirectorySync(installPath)) {
               final String pluginsPath = fs.path.join(dir.path, 'config', 'plugins');
               addValidator(title, version, installPath, pluginsPath);
             }
           }
         });
       }
     }
     return validators;
   }
 }

 class IntelliJValidatorOnMac extends IntelliJValidator {
   IntelliJValidatorOnMac(String title, this.id, this.installPath) : super(title);

   final String id;
   final String installPath;

   static final Map<String, String> _dirNameToId = <String, String>{
     'IntelliJ IDEA.app' : 'IntelliJIdea',
     'IntelliJ IDEA Ultimate.app' : 'IntelliJIdea',
     'IntelliJ IDEA CE.app' : 'IdeaIC',
   };

   static Iterable<DoctorValidator> get installed {
     final List<DoctorValidator> validators = <DoctorValidator>[];
     final List<String> installPaths = <String>['/Applications', fs.path.join(homeDirPath, 'Applications')];

     void checkForIntelliJ(Directory dir) {
       final String name = fs.path.basename(dir.path);
       _dirNameToId.forEach((String dirName, String id) {
         if (name == dirName) {
           final String title = IntelliJValidator._idToTitle[id];
           validators.add(new IntelliJValidatorOnMac(title, id, dir.path));
         }
       });
     }

     try {
       final Iterable<FileSystemEntity> installDirs = installPaths
               .map((String installPath) => fs.directory(installPath))
               .map((Directory dir) => dir.existsSync() ? dir.listSync() : <FileSystemEntity>[])
               .expand((List<FileSystemEntity> mappedDirs) => mappedDirs)
               .where((FileSystemEntity mappedDir) => mappedDir is Directory);
       for (FileSystemEntity dir in installDirs) {
         if (dir is Directory) {
           checkForIntelliJ(dir);
           if (!dir.path.endsWith('.app')) {
             for (FileSystemEntity subdir in dir.listSync()) {
               if (subdir is Directory) {
                 checkForIntelliJ(subdir);
               }
             }
           }
         }
       }
     } on FileSystemException catch (e) {
       validators.add(new ValidatorWithResult(
           'Cannot determine if IntelliJ is installed',
           new ValidationResult(ValidationType.missing, <ValidationMessage>[
              new ValidationMessage.error(e.message),
           ]),
       ));
     }
     return validators;
   }

   @override
   String get version {
     if (_version == null) {
       final String plistFile = fs.path.join(installPath, 'Contents', 'Info.plist');
       _version = getValueFromFile(plistFile, kCFBundleShortVersionStringKey) ?? 'unknown';
     }
     return _version;
   }
   String _version;

   @override
   String get pluginsPath {
     final List<String> split = version.split('.');
     final String major = split[0];
     final String minor = split[1];
     return fs.path.join(homeDirPath, 'Library', 'Application Support', '$id$major.$minor');
   }
 }

 class DeviceValidator extends DoctorValidator {
   DeviceValidator() : super('Connected devices');

   @override
   Future<ValidationResult> validate() async {
     final List<Device> devices = await deviceManager.getAllConnectedDevices().toList();
     List<ValidationMessage> messages;
     if (devices.isEmpty) {
       final List<String> diagnostics = await deviceManager.getDeviceDiagnostics();
       if (diagnostics.isNotEmpty) {
         messages = diagnostics.map((String message) => new ValidationMessage(message)).toList();
       } else {
         messages = <ValidationMessage>[new ValidationMessage('None')];
       }
     } else {
       messages = await Device.descriptions(devices)
           .map((String msg) => new ValidationMessage(msg)).toList();
     }
     return new ValidationResult(devices.isEmpty ? ValidationType.partial : ValidationType.installed, messages);
   }
 }

 class ValidatorWithResult extends DoctorValidator {
   final ValidationResult result;

   ValidatorWithResult(String title, this.result) : super(title);

   @override
   Future<ValidationResult> validate() async => result;
 }
	// Copyright 2016 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	import 'dart:async';
	import 'dart:convert' show UTF8;

	import 'package:archive/archive.dart';

	import 'android/android_studio_validator.dart';
	import 'android/android_workflow.dart';
	import 'artifacts.dart';
	import 'base/common.dart';
	import 'base/context.dart';
	import 'base/file_system.dart';
	import 'base/os.dart';
	import 'base/platform.dart';
	import 'base/process_manager.dart';
	import 'base/version.dart';
	import 'cache.dart';
	import 'device.dart';
	import 'globals.dart';
	import 'ios/ios_workflow.dart';
	import 'ios/plist_utils.dart';
	import 'version.dart';

	Doctor get doctor => context[Doctor];

	class Doctor {
	List<DoctorValidator> _validators;

	List<DoctorValidator> get validators {
	if (_validators == null) {
	_validators = <DoctorValidator>[];
	_validators.add(new _FlutterValidator());

	if (androidWorkflow.appliesToHostPlatform)
	_validators.add(androidWorkflow);

	if (iosWorkflow.appliesToHostPlatform)
	_validators.add(iosWorkflow);

	final List<DoctorValidator> ideValidators = <DoctorValidator>[];
	ideValidators.addAll(AndroidStudioValidator.allValidators);
	ideValidators.addAll(IntelliJValidator.installedValidators);
	if (ideValidators.isNotEmpty)
	_validators.addAll(ideValidators);
	else
	_validators.add(new NoIdeValidator());

	if (deviceManager.canListAnything)
	_validators.add(new DeviceValidator());
	}
	return _validators;
	}

	List<Workflow> get workflows {
	return new List<Workflow>.from(validators.where((DoctorValidator validator) => validator is Workflow));
	}

	/// Print a summary of the state of the tooling, as well as how to get more info.
	Future<Null> summary() async {
	printStatus(await summaryText);
	}

	Future<String> get summaryText async {
	final StringBuffer buffer = new StringBuffer();

	bool allGood = true;

	for (DoctorValidator validator in validators) {
	final ValidationResult result = await validator.validate();
	buffer.write('${result.leadingBox} ${validator.title} is ');
	if (result.type == ValidationType.missing)
	buffer.write('not installed.');
	else if (result.type == ValidationType.partial)
	buffer.write('partially installed; more components are available.');
	else
	buffer.write('fully installed.');

	if (result.statusInfo != null)
	buffer.write(' (${result.statusInfo})');

	buffer.writeln();

	if (result.type != ValidationType.installed)
	allGood = false;
	}

	if (!allGood) {
	buffer.writeln();
	buffer.writeln('Run "flutter doctor" for information about installing additional components.');
	}

	return buffer.toString();
	}

	/// Print verbose information about the state of installed tooling.
	Future<bool> diagnose({ bool androidLicenses: false }) async {
	if (androidLicenses)
	return AndroidWorkflow.runLicenseManager();

	bool doctorResult = true;

	for (DoctorValidator validator in validators) {
	final ValidationResult result = await validator.validate();

	if (result.type == ValidationType.missing)
	doctorResult = false;

	if (result.statusInfo != null)
	printStatus('${result.leadingBox} ${validator.title} (${result.statusInfo})');
	else
	printStatus('${result.leadingBox} ${validator.title}');

	for (ValidationMessage message in result.messages) {
	final String text = message.message.replaceAll('\n', '\n ');
	if (message.isError) {
	printStatus(' ✗ $text', emphasis: true);
	} else {
	printStatus(' • $text');
	}
	}

	printStatus('');
	}

	return doctorResult;
	}

	bool get canListAnything => workflows.any((Workflow workflow) => workflow.canListDevices);

	bool get canLaunchAnything => workflows.any((Workflow workflow) => workflow.canLaunchDevices);
	}

	/// A series of tools and required install steps for a target platform (iOS or Android).
	abstract class Workflow {
	/// Whether the workflow applies to this platform (as in, should we ever try and use it).
	bool get appliesToHostPlatform;

	/// Are we functional enough to list devices?
	bool get canListDevices;

	/// Could this thing launch something? It may still have minor issues.
	bool get canLaunchDevices;
	}

	enum ValidationType {
	missing,
	partial,
	installed
	}

	abstract class DoctorValidator {
	DoctorValidator(this.title);

	final String title;

	Future<ValidationResult> validate();
	}

	class ValidationResult {
	ValidationResult(this.type, this.messages, { this.statusInfo });

	final ValidationType type;
	// A short message about the status.
	final String statusInfo;
	final List<ValidationMessage> messages;

	String get leadingBox {
	if (type == ValidationType.missing)
	return '[✗]';
	else if (type == ValidationType.installed)
	return '[✓]';
	else
	return '[-]';
	}
	}

	class ValidationMessage {
	ValidationMessage(this.message) : isError = false;
	ValidationMessage.error(this.message) : isError = true;

	final bool isError;
	final String message;

	@override
	String toString() => message;
	}

	class _FlutterValidator extends DoctorValidator {
	_FlutterValidator() : super('Flutter');

	@override
	Future<ValidationResult> validate() async {
	final List<ValidationMessage> messages = <ValidationMessage>[];
	ValidationType valid = ValidationType.installed;

	final FlutterVersion version = FlutterVersion.instance;

	messages.add(new ValidationMessage('Flutter version ${version.frameworkVersion} at ${Cache.flutterRoot}'));
	if (Cache.flutterRoot.contains(' '))
	messages.add(new ValidationMessage.error(
	'Flutter SDK install paths with spaces are not yet supported. (https://github.com/flutter/flutter/issues/6577)\n'
	'Please move the SDK to a path that does not include spaces.'));
	messages.add(new ValidationMessage(
	'Framework revision ${version.frameworkRevisionShort} '
	'(${version.frameworkAge}), ${version.frameworkDate}'
	));
	messages.add(new ValidationMessage('Engine revision ${version.engineRevisionShort}'));
	messages.add(new ValidationMessage('Tools Dart version ${version.dartSdkVersion}'));
	messages.add(new ValidationMessage('Engine Dart version ${version.engineDartVersion}'));
	final String genSnapshotPath =
	artifacts.getArtifactPath(Artifact.genSnapshot);

	// Check that the binaries we downloaded for this platform actually run on it.
	if (!_genSnapshotRuns(genSnapshotPath)) {
	messages.add(new ValidationMessage.error('Downloaded executables cannot execute '
	'on host (see https://github.com/flutter/flutter/issues/6207 for more information)'));
	valid = ValidationType.partial;
	}

	return new ValidationResult(valid, messages,
	statusInfo: 'on ${os.name}, locale ${platform.localeName}, channel ${version.channel}');
	}
	}

	bool _genSnapshotRuns(String genSnapshotPath) {
	final int kExpectedExitCode = 255;
	try {
	return processManager.runSync(<String>[genSnapshotPath]).exitCode == kExpectedExitCode;
	} catch (error) {
	return false;
	}
	}

	class NoIdeValidator extends DoctorValidator {
	NoIdeValidator() : super('Flutter IDE Support');

	@override
	Future<ValidationResult> validate() async {
	return new ValidationResult(ValidationType.missing, <ValidationMessage>[
	new ValidationMessage('IntelliJ - https://www.jetbrains.com/idea/'),
	], statusInfo: 'No supported IDEs installed');
	}
	}

	abstract class IntelliJValidator extends DoctorValidator {
	IntelliJValidator(String title) : super(title);

	String get version;
	String get pluginsPath;

	static final Map<String, String> _idToTitle = <String, String>{
	'IntelliJIdea' : 'IntelliJ IDEA Ultimate Edition',
	'IdeaIC' : 'IntelliJ IDEA Community Edition',
	};

	static final Version kMinIdeaVersion = new Version(2017, 1, 0);
	static final Version kMinFlutterPluginVersion = new Version(16, 0, 0);

	static Iterable<DoctorValidator> get installedValidators {
	if (platform.isLinux \|\| platform.isWindows)
	return IntelliJValidatorOnLinuxAndWindows.installed;
	if (platform.isMacOS)
	return IntelliJValidatorOnMac.installed;
	return <DoctorValidator>[];
	}

	@override
	Future<ValidationResult> validate() async {
	final List<ValidationMessage> messages = <ValidationMessage>[];

	_validatePackage(messages, <String>['flutter-intellij', 'flutter-intellij.jar'],
	'Flutter', minVersion: kMinFlutterPluginVersion);
	_validatePackage(messages, <String>['Dart'], 'Dart');

	if (_hasIssues(messages)) {
	messages.add(new ValidationMessage(
	'For information about installing plugins, see\n'
	'https://flutter.io/intellij-setup/#installing-the-plugins'
	));
	}

	_validateIntelliJVersion(messages, kMinIdeaVersion);

	return new ValidationResult(
	_hasIssues(messages) ? ValidationType.partial : ValidationType.installed,
	messages,
	statusInfo: 'version $version'
	);
	}

	bool _hasIssues(List<ValidationMessage> messages) {
	return messages.any((ValidationMessage message) => message.isError);
	}

	void _validateIntelliJVersion(List<ValidationMessage> messages, Version minVersion) {
	// Ignore unknown versions.
	if (minVersion == Version.unknown)
	return;

	final Version installedVersion = new Version.parse(version);
	if (installedVersion == null)
	return;

	if (installedVersion < minVersion) {
	messages.add(new ValidationMessage.error(
	'This install is older than the minimum recommended version of $minVersion.'
	));
	}
	}

	void _validatePackage(List<ValidationMessage> messages, List<String> packageNames, String title, {
	Version minVersion
	}) {
	for (String packageName in packageNames) {
	if (!hasPackage(packageName)) {
	continue;
	}

	final String versionText = _readPackageVersion(packageName);
	final Version version = new Version.parse(versionText);
	if (version != null && minVersion != null && version < minVersion) {
	messages.add(new ValidationMessage.error(
	'$title plugin version $versionText - the recommended minimum version is $minVersion'
	));
	} else {
	messages.add(new ValidationMessage(
	'$title plugin ${version != null ? "version $version" : "installed"}'
	));
	}

	return;
	}

	messages.add(new ValidationMessage.error(
	'$title plugin not installed; this adds $title specific functionality.'
	));
	}

	String _readPackageVersion(String packageName) {
	final String jarPath = packageName.endsWith('.jar')
	? fs.path.join(pluginsPath, packageName)
	: fs.path.join(pluginsPath, packageName, 'lib', '$packageName.jar');
	// TODO(danrubel) look for a better way to extract a single 2K file from the zip
	// rather than reading the entire file into memory.
	try {
	final Archive archive = new ZipDecoder().decodeBytes(fs.file(jarPath).readAsBytesSync());
	final ArchiveFile file = archive.findFile('META-INF/plugin.xml');
	final String content = UTF8.decode(file.content);
	final String versionStartTag = '<version>';
	final int start = content.indexOf(versionStartTag);
	final int end = content.indexOf('</version>', start);
	return content.substring(start + versionStartTag.length, end);
	} catch (_) {
	return null;
	}
	}

	bool hasPackage(String packageName) {
	final String packagePath = fs.path.join(pluginsPath, packageName);
	if (packageName.endsWith('.jar'))
	return fs.isFileSync(packagePath);
	return fs.isDirectorySync(packagePath);
	}
	}

	class IntelliJValidatorOnLinuxAndWindows extends IntelliJValidator {
	IntelliJValidatorOnLinuxAndWindows(String title, this.version, this.installPath, this.pluginsPath) : super(title);

	@override
	String version;

	final String installPath;

	@override
	String pluginsPath;

	static Iterable<DoctorValidator> get installed {
	final List<DoctorValidator> validators = <DoctorValidator>[];
	if (homeDirPath == null)
	return validators;

	void addValidator(String title, String version, String installPath, String pluginsPath) {
	final IntelliJValidatorOnLinuxAndWindows validator =
	new IntelliJValidatorOnLinuxAndWindows(title, version, installPath, pluginsPath);
	for (int index = 0; index < validators.length; ++index) {
	final DoctorValidator other = validators[index];
	if (other is IntelliJValidatorOnLinuxAndWindows && validator.installPath == other.installPath) {
	if (validator.version.compareTo(other.version) > 0)
	validators[index] = validator;
	return;
	}
	}
	validators.add(validator);
	}

	for (FileSystemEntity dir in fs.directory(homeDirPath).listSync()) {
	if (dir is Directory) {
	final String name = fs.path.basename(dir.path);
	IntelliJValidator._idToTitle.forEach((String id, String title) {
	if (name.startsWith('.$id')) {
	final String version = name.substring(id.length + 1);
	String installPath;
	try {
	installPath = fs.file(fs.path.join(dir.path, 'system', '.home')).readAsStringSync();
	} catch (e) {
	// ignored
	}
	if (installPath != null && fs.isDirectorySync(installPath)) {
	final String pluginsPath = fs.path.join(dir.path, 'config', 'plugins');
	addValidator(title, version, installPath, pluginsPath);
	}
	}
	});
	}
	}
	return validators;
	}
	}

	class IntelliJValidatorOnMac extends IntelliJValidator {
	IntelliJValidatorOnMac(String title, this.id, this.installPath) : super(title);

	final String id;
	final String installPath;

	static final Map<String, String> _dirNameToId = <String, String>{
	'IntelliJ IDEA.app' : 'IntelliJIdea',
	'IntelliJ IDEA Ultimate.app' : 'IntelliJIdea',
	'IntelliJ IDEA CE.app' : 'IdeaIC',
	};

	static Iterable<DoctorValidator> get installed {
	final List<DoctorValidator> validators = <DoctorValidator>[];
	final List<String> installPaths = <String>['/Applications', fs.path.join(homeDirPath, 'Applications')];

	void checkForIntelliJ(Directory dir) {
	final String name = fs.path.basename(dir.path);
	_dirNameToId.forEach((String dirName, String id) {
	if (name == dirName) {
	final String title = IntelliJValidator._idToTitle[id];
	validators.add(new IntelliJValidatorOnMac(title, id, dir.path));
	}
	});
	}

	try {
	final Iterable<FileSystemEntity> installDirs = installPaths
	.map((String installPath) => fs.directory(installPath))
	.map((Directory dir) => dir.existsSync() ? dir.listSync() : <FileSystemEntity>[])
	.expand((List<FileSystemEntity> mappedDirs) => mappedDirs)
	.where((FileSystemEntity mappedDir) => mappedDir is Directory);
	for (FileSystemEntity dir in installDirs) {
	if (dir is Directory) {
	checkForIntelliJ(dir);
	if (!dir.path.endsWith('.app')) {
	for (FileSystemEntity subdir in dir.listSync()) {
	if (subdir is Directory) {
	checkForIntelliJ(subdir);
	}
	}
	}
	}
	}
	} on FileSystemException catch (e) {
	validators.add(new ValidatorWithResult(
	'Cannot determine if IntelliJ is installed',
	new ValidationResult(ValidationType.missing, <ValidationMessage>[
	new ValidationMessage.error(e.message),
	]),
	));
	}
	return validators;
	}

	@override
	String get version {
	if (_version == null) {
	final String plistFile = fs.path.join(installPath, 'Contents', 'Info.plist');
	_version = getValueFromFile(plistFile, kCFBundleShortVersionStringKey) ?? 'unknown';
	}
	return _version;
	}
	String _version;

	@override
	String get pluginsPath {
	final List<String> split = version.split('.');
	final String major = split[0];
	final String minor = split[1];
	return fs.path.join(homeDirPath, 'Library', 'Application Support', '$id$major.$minor');
	}
	}

	class DeviceValidator extends DoctorValidator {
	DeviceValidator() : super('Connected devices');

	@override
	Future<ValidationResult> validate() async {
	final List<Device> devices = await deviceManager.getAllConnectedDevices().toList();
	List<ValidationMessage> messages;
	if (devices.isEmpty) {
	final List<String> diagnostics = await deviceManager.getDeviceDiagnostics();
	if (diagnostics.isNotEmpty) {
	messages = diagnostics.map((String message) => new ValidationMessage(message)).toList();
	} else {
	messages = <ValidationMessage>[new ValidationMessage('None')];
	}
	} else {
	messages = await Device.descriptions(devices)
	.map((String msg) => new ValidationMessage(msg)).toList();
	}
	return new ValidationResult(devices.isEmpty ? ValidationType.partial : ValidationType.installed, messages);
	}
	}

	class ValidatorWithResult extends DoctorValidator {
	final ValidationResult result;

	ValidatorWithResult(String title, this.result) : super(title);

	@override
	Future<ValidationResult> validate() async => result;
	}