| // Copyright 2015 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 'package:meta/meta.dart'; |
| |
| import 'base/common.dart'; |
| import 'base/context.dart'; |
| import 'base/file_system.dart'; |
| import 'base/io.dart'; |
| import 'base/process.dart'; |
| import 'base/process_manager.dart'; |
| import 'base/time.dart'; |
| import 'cache.dart'; |
| import 'convert.dart'; |
| import 'globals.dart'; |
| |
| class FlutterVersion { |
| @visibleForTesting |
| FlutterVersion([this._clock = const SystemClock()]) { |
| _frameworkRevision = _runGit('git log -n 1 --pretty=format:%H'); |
| _frameworkVersion = GitTagVersion.determine().frameworkVersionFor(_frameworkRevision); |
| } |
| |
| final SystemClock _clock; |
| |
| String _repositoryUrl; |
| String get repositoryUrl { |
| final String _ = channel; |
| return _repositoryUrl; |
| } |
| |
| /// Whether we are currently on the master branch. |
| bool get isMaster { |
| final String branchName = getBranchName(); |
| return !<String>['dev', 'beta', 'stable'].contains(branchName); |
| } |
| |
| static const Set<String> officialChannels = <String>{ |
| 'master', |
| 'dev', |
| 'beta', |
| 'stable', |
| }; |
| |
| /// This maps old branch names to the names of branches that replaced them. |
| /// |
| /// For example, in early 2018 we changed from having an "alpha" branch to |
| /// having a "dev" branch, so anyone using "alpha" now gets transitioned to |
| /// "dev". |
| static Map<String, String> obsoleteBranches = <String, String>{ |
| 'alpha': 'dev', |
| 'hackathon': 'dev', |
| 'codelab': 'dev', |
| }; |
| |
| String _channel; |
| /// The channel is the upstream branch. |
| /// `master`, `dev`, `beta`, `stable`; or old ones, like `alpha`, `hackathon`, ... |
| String get channel { |
| if (_channel == null) { |
| final String channel = _runGit('git rev-parse --abbrev-ref --symbolic @{u}'); |
| final int slash = channel.indexOf('/'); |
| if (slash != -1) { |
| final String remote = channel.substring(0, slash); |
| _repositoryUrl = _runGit('git ls-remote --get-url $remote'); |
| _channel = channel.substring(slash + 1); |
| } else if (channel.isEmpty) { |
| _channel = 'unknown'; |
| } else { |
| _channel = channel; |
| } |
| } |
| return _channel; |
| } |
| |
| /// The name of the local branch. |
| /// Use getBranchName() to read this. |
| String _branch; |
| |
| String _frameworkRevision; |
| String get frameworkRevision => _frameworkRevision; |
| String get frameworkRevisionShort => _shortGitRevision(frameworkRevision); |
| |
| String _frameworkAge; |
| String get frameworkAge { |
| return _frameworkAge ??= _runGit('git log -n 1 --pretty=format:%ar'); |
| } |
| |
| String _frameworkVersion; |
| String get frameworkVersion => _frameworkVersion; |
| |
| String get frameworkDate => frameworkCommitDate; |
| |
| String get dartSdkVersion => Cache.instance.dartSdkVersion; |
| |
| String get engineRevision => Cache.instance.engineRevision; |
| String get engineRevisionShort => _shortGitRevision(engineRevision); |
| |
| Future<void> ensureVersionFile() { |
| return fs.file(fs.path.join(Cache.flutterRoot, 'version')).writeAsString(_frameworkVersion); |
| } |
| |
| @override |
| String toString() { |
| final String versionText = frameworkVersion == 'unknown' ? '' : ' $frameworkVersion'; |
| final String flutterText = 'Flutter$versionText • channel $channel • ${repositoryUrl ?? 'unknown source'}'; |
| final String frameworkText = 'Framework • revision $frameworkRevisionShort ($frameworkAge) • $frameworkCommitDate'; |
| final String engineText = 'Engine • revision $engineRevisionShort'; |
| final String toolsText = 'Tools • Dart $dartSdkVersion'; |
| |
| // Flutter 1.10.2-pre.69 • channel master • https://github.com/flutter/flutter.git |
| // Framework • revision 340c158f32 (84 minutes ago) • 2018-10-26 11:27:22 -0400 |
| // Engine • revision 9c46333e14 |
| // Tools • Dart 2.1.0 (build 2.1.0-dev.8.0 bf26f760b1) |
| |
| return '$flutterText\n$frameworkText\n$engineText\n$toolsText'; |
| } |
| |
| Map<String, Object> toJson() => <String, Object>{ |
| 'frameworkVersion': frameworkVersion ?? 'unknown', |
| 'channel': channel, |
| 'repositoryUrl': repositoryUrl ?? 'unknown source', |
| 'frameworkRevision': frameworkRevision, |
| 'frameworkCommitDate': frameworkCommitDate, |
| 'engineRevision': engineRevision, |
| 'dartSdkVersion': dartSdkVersion, |
| }; |
| |
| /// A date String describing the last framework commit. |
| String get frameworkCommitDate => _latestGitCommitDate(); |
| |
| static String _latestGitCommitDate([ String branch ]) { |
| final List<String> args = <String>['git', 'log']; |
| |
| if (branch != null) |
| args.add(branch); |
| |
| args.addAll(<String>['-n', '1', '--pretty=format:%ad', '--date=iso']); |
| return _runSync(args, lenient: false); |
| } |
| |
| /// The name of the temporary git remote used to check for the latest |
| /// available Flutter framework version. |
| /// |
| /// In the absence of bugs and crashes a Flutter developer should never see |
| /// this remote appear in their `git remote` list, but also if it happens to |
| /// persist we do the proper clean-up for extra robustness. |
| static const String _versionCheckRemote = '__flutter_version_check__'; |
| |
| /// The date of the latest framework commit in the remote repository. |
| /// |
| /// Throws [ToolExit] if a git command fails, for example, when the remote git |
| /// repository is not reachable due to a network issue. |
| static Future<String> fetchRemoteFrameworkCommitDate(String branch) async { |
| await _removeVersionCheckRemoteIfExists(); |
| try { |
| await _run(<String>[ |
| 'git', |
| 'remote', |
| 'add', |
| _versionCheckRemote, |
| 'https://github.com/flutter/flutter.git', |
| ]); |
| await _run(<String>['git', 'fetch', _versionCheckRemote, branch]); |
| return _latestGitCommitDate('$_versionCheckRemote/$branch'); |
| } finally { |
| await _removeVersionCheckRemoteIfExists(); |
| } |
| } |
| |
| static Future<void> _removeVersionCheckRemoteIfExists() async { |
| final List<String> remotes = (await _run(<String>['git', 'remote'])) |
| .split('\n') |
| .map<String>((String name) => name.trim()) // to account for OS-specific line-breaks |
| .toList(); |
| if (remotes.contains(_versionCheckRemote)) |
| await _run(<String>['git', 'remote', 'remove', _versionCheckRemote]); |
| } |
| |
| static FlutterVersion get instance => context.get<FlutterVersion>(); |
| |
| /// Return a short string for the version (e.g. `master/0.0.59-pre.92`, `scroll_refactor/a76bc8e22b`). |
| String getVersionString({ bool redactUnknownBranches = false }) { |
| if (frameworkVersion != 'unknown') |
| return '${getBranchName(redactUnknownBranches: redactUnknownBranches)}/$frameworkVersion'; |
| return '${getBranchName(redactUnknownBranches: redactUnknownBranches)}/$frameworkRevisionShort'; |
| } |
| |
| /// Return the branch name. |
| /// |
| /// If [redactUnknownBranches] is true and the branch is unknown, |
| /// the branch name will be returned as `'[user-branch]'`. |
| String getBranchName({ bool redactUnknownBranches = false }) { |
| _branch ??= () { |
| final String branch = _runGit('git rev-parse --abbrev-ref HEAD'); |
| return branch == 'HEAD' ? channel : branch; |
| }(); |
| if (redactUnknownBranches || _branch.isEmpty) { |
| // Only return the branch names we know about; arbitrary branch names might contain PII. |
| if (!officialChannels.contains(_branch) && !obsoleteBranches.containsKey(_branch)) |
| return '[user-branch]'; |
| } |
| return _branch; |
| } |
| |
| /// Returns true if `tentativeDescendantRevision` is a direct descendant to |
| /// the `tentativeAncestorRevision` revision on the Flutter framework repo |
| /// tree. |
| bool checkRevisionAncestry({ |
| String tentativeDescendantRevision, |
| String tentativeAncestorRevision, |
| }) { |
| final ProcessResult result = processManager.runSync( |
| <String>['git', 'merge-base', '--is-ancestor', tentativeAncestorRevision, tentativeDescendantRevision], |
| workingDirectory: Cache.flutterRoot, |
| ); |
| return result.exitCode == 0; |
| } |
| |
| /// The amount of time we wait before pinging the server to check for the |
| /// availability of a newer version of Flutter. |
| @visibleForTesting |
| static const Duration checkAgeConsideredUpToDate = Duration(days: 3); |
| |
| /// We warn the user if the age of their Flutter installation is greater than |
| /// this duration. The durations are slightly longer than the expected release |
| /// cadence for each channel, to give the user a grace period before they get |
| /// notified. |
| /// |
| /// For example, for the beta channel, this is set to five weeks because |
| /// beta releases happen approximately every month. |
| @visibleForTesting |
| static Duration versionAgeConsideredUpToDate(String channel) { |
| switch (channel) { |
| case 'stable': |
| return const Duration(days: 365 ~/ 2); // Six months |
| case 'beta': |
| return const Duration(days: 7 * 8); // Eight weeks |
| case 'dev': |
| return const Duration(days: 7 * 4); // Four weeks |
| default: |
| return const Duration(days: 7 * 3); // Three weeks |
| } |
| } |
| |
| /// The amount of time we wait between issuing a warning. |
| /// |
| /// This is to avoid annoying users who are unable to upgrade right away. |
| @visibleForTesting |
| static const Duration maxTimeSinceLastWarning = Duration(days: 1); |
| |
| /// The amount of time we pause for to let the user read the message about |
| /// outdated Flutter installation. |
| /// |
| /// This can be customized in tests to speed them up. |
| @visibleForTesting |
| static Duration timeToPauseToLetUserReadTheMessage = const Duration(seconds: 2); |
| |
| /// Reset the version freshness information by removing the stamp file. |
| /// |
| /// New version freshness information will be regenerated when |
| /// [checkFlutterVersionFreshness] is called after this. This is typically |
| /// used when switching channels so that stale information from another |
| /// channel doesn't linger. |
| static Future<void> resetFlutterVersionFreshnessCheck() async { |
| try { |
| await Cache.instance.getStampFileFor( |
| VersionCheckStamp.flutterVersionCheckStampFile, |
| ).delete(); |
| } on FileSystemException { |
| // Ignore, since we don't mind if the file didn't exist in the first place. |
| } |
| } |
| |
| /// Checks if the currently installed version of Flutter is up-to-date, and |
| /// warns the user if it isn't. |
| /// |
| /// This function must run while [Cache.lock] is acquired because it reads and |
| /// writes shared cache files. |
| Future<void> checkFlutterVersionFreshness() async { |
| // Don't perform update checks if we're not on an official channel. |
| if (!officialChannels.contains(channel)) { |
| return; |
| } |
| |
| final DateTime localFrameworkCommitDate = DateTime.parse(frameworkCommitDate); |
| final Duration frameworkAge = _clock.now().difference(localFrameworkCommitDate); |
| final bool installationSeemsOutdated = frameworkAge > versionAgeConsideredUpToDate(channel); |
| |
| // Get whether there's a newer version on the remote. This only goes |
| // to the server if we haven't checked recently so won't happen on every |
| // command. |
| final DateTime latestFlutterCommitDate = await _getLatestAvailableFlutterDate(); |
| final VersionCheckResult remoteVersionStatus = |
| latestFlutterCommitDate == null |
| ? VersionCheckResult.unknown |
| : latestFlutterCommitDate.isAfter(localFrameworkCommitDate) |
| ? VersionCheckResult.newVersionAvailable |
| : VersionCheckResult.versionIsCurrent; |
| |
| // Do not load the stamp before the above server check as it may modify the stamp file. |
| final VersionCheckStamp stamp = await VersionCheckStamp.load(); |
| final DateTime lastTimeWarningWasPrinted = stamp.lastTimeWarningWasPrinted ?? _clock.ago(maxTimeSinceLastWarning * 2); |
| final bool beenAWhileSinceWarningWasPrinted = _clock.now().difference(lastTimeWarningWasPrinted) > maxTimeSinceLastWarning; |
| |
| // We show a warning if either we know there is a new remote version, or we couldn't tell but the local |
| // version is outdated. |
| final bool canShowWarning = |
| remoteVersionStatus == VersionCheckResult.newVersionAvailable || |
| (remoteVersionStatus == VersionCheckResult.unknown && |
| installationSeemsOutdated); |
| |
| if (beenAWhileSinceWarningWasPrinted && canShowWarning) { |
| final String updateMessage = |
| remoteVersionStatus == VersionCheckResult.newVersionAvailable |
| ? newVersionAvailableMessage() |
| : versionOutOfDateMessage(frameworkAge); |
| printStatus(updateMessage, emphasis: true); |
| await Future.wait<void>(<Future<void>>[ |
| stamp.store( |
| newTimeWarningWasPrinted: _clock.now(), |
| ), |
| Future<void>.delayed(timeToPauseToLetUserReadTheMessage), |
| ]); |
| } |
| } |
| |
| @visibleForTesting |
| static String versionOutOfDateMessage(Duration frameworkAge) { |
| String warning = 'WARNING: your installation of Flutter is ${frameworkAge.inDays} days old.'; |
| // Append enough spaces to match the message box width. |
| warning += ' ' * (74 - warning.length); |
| |
| return ''' |
| ╔════════════════════════════════════════════════════════════════════════════╗ |
| ║ $warning ║ |
| ║ ║ |
| ║ To update to the latest version, run "flutter upgrade". ║ |
| ╚════════════════════════════════════════════════════════════════════════════╝ |
| '''; |
| } |
| |
| @visibleForTesting |
| static String newVersionAvailableMessage() { |
| return ''' |
| ╔════════════════════════════════════════════════════════════════════════════╗ |
| ║ A new version of Flutter is available! ║ |
| ║ ║ |
| ║ To update to the latest version, run "flutter upgrade". ║ |
| ╚════════════════════════════════════════════════════════════════════════════╝ |
| '''; |
| } |
| |
| /// Gets the release date of the latest available Flutter version. |
| /// |
| /// This method sends a server request if it's been more than |
| /// [checkAgeConsideredUpToDate] since the last version check. |
| /// |
| /// Returns null if the cached version is out-of-date or missing, and we are |
| /// unable to reach the server to get the latest version. |
| Future<DateTime> _getLatestAvailableFlutterDate() async { |
| Cache.checkLockAcquired(); |
| final VersionCheckStamp versionCheckStamp = await VersionCheckStamp.load(); |
| |
| if (versionCheckStamp.lastTimeVersionWasChecked != null) { |
| final Duration timeSinceLastCheck = _clock.now().difference(versionCheckStamp.lastTimeVersionWasChecked); |
| |
| // Don't ping the server too often. Return cached value if it's fresh. |
| if (timeSinceLastCheck < checkAgeConsideredUpToDate) |
| return versionCheckStamp.lastKnownRemoteVersion; |
| } |
| |
| // Cache is empty or it's been a while since the last server ping. Ping the server. |
| try { |
| final DateTime remoteFrameworkCommitDate = DateTime.parse(await FlutterVersion.fetchRemoteFrameworkCommitDate(channel)); |
| await versionCheckStamp.store( |
| newTimeVersionWasChecked: _clock.now(), |
| newKnownRemoteVersion: remoteFrameworkCommitDate, |
| ); |
| return remoteFrameworkCommitDate; |
| } on VersionCheckError catch (error) { |
| // This happens when any of the git commands fails, which can happen when |
| // there's no Internet connectivity. Remote version check is best effort |
| // only. We do not prevent the command from running when it fails. |
| printTrace('Failed to check Flutter version in the remote repository: $error'); |
| // Still update the timestamp to avoid us hitting the server on every single |
| // command if for some reason we cannot connect (eg. we may be offline). |
| await versionCheckStamp.store( |
| newTimeVersionWasChecked: _clock.now(), |
| ); |
| return null; |
| } |
| } |
| } |
| |
| /// Contains data and load/save logic pertaining to Flutter version checks. |
| @visibleForTesting |
| class VersionCheckStamp { |
| const VersionCheckStamp({ |
| this.lastTimeVersionWasChecked, |
| this.lastKnownRemoteVersion, |
| this.lastTimeWarningWasPrinted, |
| }); |
| |
| final DateTime lastTimeVersionWasChecked; |
| final DateTime lastKnownRemoteVersion; |
| final DateTime lastTimeWarningWasPrinted; |
| |
| /// The prefix of the stamp file where we cache Flutter version check data. |
| @visibleForTesting |
| static const String flutterVersionCheckStampFile = 'flutter_version_check'; |
| |
| static Future<VersionCheckStamp> load() async { |
| final String versionCheckStamp = Cache.instance.getStampFor(flutterVersionCheckStampFile); |
| |
| if (versionCheckStamp != null) { |
| // Attempt to parse stamp JSON. |
| try { |
| final dynamic jsonObject = json.decode(versionCheckStamp); |
| if (jsonObject is Map) { |
| return fromJson(jsonObject); |
| } else { |
| printTrace('Warning: expected version stamp to be a Map but found: $jsonObject'); |
| } |
| } catch (error, stackTrace) { |
| // Do not crash if JSON is malformed. |
| printTrace('${error.runtimeType}: $error\n$stackTrace'); |
| } |
| } |
| |
| // Stamp is missing or is malformed. |
| return const VersionCheckStamp(); |
| } |
| |
| static VersionCheckStamp fromJson(Map<String, dynamic> jsonObject) { |
| DateTime readDateTime(String property) { |
| return jsonObject.containsKey(property) |
| ? DateTime.parse(jsonObject[property]) |
| : null; |
| } |
| |
| return VersionCheckStamp( |
| lastTimeVersionWasChecked: readDateTime('lastTimeVersionWasChecked'), |
| lastKnownRemoteVersion: readDateTime('lastKnownRemoteVersion'), |
| lastTimeWarningWasPrinted: readDateTime('lastTimeWarningWasPrinted'), |
| ); |
| } |
| |
| Future<void> store({ |
| DateTime newTimeVersionWasChecked, |
| DateTime newKnownRemoteVersion, |
| DateTime newTimeWarningWasPrinted, |
| }) async { |
| final Map<String, String> jsonData = toJson(); |
| |
| if (newTimeVersionWasChecked != null) |
| jsonData['lastTimeVersionWasChecked'] = '$newTimeVersionWasChecked'; |
| |
| if (newKnownRemoteVersion != null) |
| jsonData['lastKnownRemoteVersion'] = '$newKnownRemoteVersion'; |
| |
| if (newTimeWarningWasPrinted != null) |
| jsonData['lastTimeWarningWasPrinted'] = '$newTimeWarningWasPrinted'; |
| |
| const JsonEncoder prettyJsonEncoder = JsonEncoder.withIndent(' '); |
| Cache.instance.setStampFor(flutterVersionCheckStampFile, prettyJsonEncoder.convert(jsonData)); |
| } |
| |
| Map<String, String> toJson({ |
| DateTime updateTimeVersionWasChecked, |
| DateTime updateKnownRemoteVersion, |
| DateTime updateTimeWarningWasPrinted, |
| }) { |
| updateTimeVersionWasChecked = updateTimeVersionWasChecked ?? lastTimeVersionWasChecked; |
| updateKnownRemoteVersion = updateKnownRemoteVersion ?? lastKnownRemoteVersion; |
| updateTimeWarningWasPrinted = updateTimeWarningWasPrinted ?? lastTimeWarningWasPrinted; |
| |
| final Map<String, String> jsonData = <String, String>{}; |
| |
| if (updateTimeVersionWasChecked != null) |
| jsonData['lastTimeVersionWasChecked'] = '$updateTimeVersionWasChecked'; |
| |
| if (updateKnownRemoteVersion != null) |
| jsonData['lastKnownRemoteVersion'] = '$updateKnownRemoteVersion'; |
| |
| if (updateTimeWarningWasPrinted != null) |
| jsonData['lastTimeWarningWasPrinted'] = '$updateTimeWarningWasPrinted'; |
| |
| return jsonData; |
| } |
| } |
| |
| /// Thrown when we fail to check Flutter version. |
| /// |
| /// This can happen when we attempt to `git fetch` but there is no network, or |
| /// when the installation is not git-based (e.g. a user clones the repo but |
| /// then removes .git). |
| class VersionCheckError implements Exception { |
| |
| VersionCheckError(this.message); |
| |
| final String message; |
| |
| @override |
| String toString() => '$VersionCheckError: $message'; |
| } |
| |
| /// Runs [command] and returns the standard output as a string. |
| /// |
| /// If [lenient] is true and the command fails, returns an empty string. |
| /// Otherwise, throws a [ToolExit] exception. |
| String _runSync(List<String> command, { bool lenient = true }) { |
| final ProcessResult results = processManager.runSync(command, workingDirectory: Cache.flutterRoot); |
| |
| if (results.exitCode == 0) |
| return results.stdout.trim(); |
| |
| if (!lenient) { |
| throw VersionCheckError( |
| 'Command exited with code ${results.exitCode}: ${command.join(' ')}\n' |
| 'Standard error: ${results.stderr}' |
| ); |
| } |
| |
| return ''; |
| } |
| |
| String _runGit(String command) { |
| return runSync(command.split(' '), workingDirectory: Cache.flutterRoot); |
| } |
| |
| /// Runs [command] in the root of the Flutter installation and returns the |
| /// standard output as a string. |
| /// |
| /// If the command fails, throws a [ToolExit] exception. |
| Future<String> _run(List<String> command) async { |
| final ProcessResult results = await processManager.run(command, workingDirectory: Cache.flutterRoot); |
| |
| if (results.exitCode == 0) |
| return results.stdout.trim(); |
| |
| throw VersionCheckError( |
| 'Command exited with code ${results.exitCode}: ${command.join(' ')}\n' |
| 'Standard error: ${results.stderr}' |
| ); |
| } |
| |
| String _shortGitRevision(String revision) { |
| if (revision == null) |
| return ''; |
| return revision.length > 10 ? revision.substring(0, 10) : revision; |
| } |
| |
| class GitTagVersion { |
| const GitTagVersion(this.x, this.y, this.z, this.hotfix, this.commits, this.hash); |
| const GitTagVersion.unknown() |
| : x = null, |
| y = null, |
| z = null, |
| hotfix = null, |
| commits = 0, |
| hash = ''; |
| |
| /// The X in vX.Y.Z. |
| final int x; |
| |
| /// The Y in vX.Y.Z. |
| final int y; |
| |
| /// The Z in vX.Y.Z. |
| final int z; |
| |
| /// the F in vX.Y.Z+hotfix.F |
| final int hotfix; |
| |
| /// Number of commits since the vX.Y.Z tag. |
| final int commits; |
| |
| /// The git hash (or an abbreviation thereof) for this commit. |
| final String hash; |
| |
| static GitTagVersion determine() { |
| return parse(_runGit('git describe --match v*.*.* --first-parent --long --tags')); |
| } |
| |
| static GitTagVersion parse(String version) { |
| final RegExp versionPattern = RegExp(r'^v([0-9]+)\.([0-9]+)\.([0-9]+)(?:\+hotfix\.([0-9]+))?-([0-9]+)-g([a-f0-9]+)$'); |
| final List<String> parts = versionPattern.matchAsPrefix(version)?.groups(<int>[1, 2, 3, 4, 5, 6]); |
| if (parts == null) { |
| printTrace('Could not interpret results of "git describe": $version'); |
| return const GitTagVersion.unknown(); |
| } |
| final List<int> parsedParts = parts.take(5).map<int>((String source) => source == null ? null : int.tryParse(source)).toList(); |
| return GitTagVersion(parsedParts[0], parsedParts[1], parsedParts[2], parsedParts[3], parsedParts[4], parts[5]); |
| } |
| |
| String frameworkVersionFor(String revision) { |
| if (x == null || y == null || z == null || !revision.startsWith(hash)) |
| return '0.0.0-unknown'; |
| if (commits == 0) { |
| if (hotfix != null) |
| return '$x.$y.$z+hotfix.$hotfix'; |
| return '$x.$y.$z'; |
| } |
| if (hotfix != null) |
| return '$x.$y.$z+hotfix.${hotfix + 1}-pre.$commits'; |
| return '$x.$y.${z + 1}-pre.$commits'; |
| } |
| } |
| |
| enum VersionCheckResult { |
| /// Unable to check whether a new version is available, possibly due to |
| /// a connectivity issue. |
| unknown, |
| /// The current version is up to date. |
| versionIsCurrent, |
| /// A newer version is available. |
| newVersionAvailable, |
| } |