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// Copyright 2014 The Flutter 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 'package:meta/meta.dart';
import '../base/error_handling_io.dart';
import '../base/file_system.dart';
import '../base/process.dart';
import '../base/terminal.dart';
import '../globals.dart' as globals;
import '../project.dart';
import '../reporting/reporting.dart';
import 'gradle_utils.dart';
import 'multidex.dart';
typedef GradleErrorTest = bool Function(String);
/// A Gradle error handled by the tool.
class GradleHandledError {
const GradleHandledError({
required this.test,
required this.handler,
this.eventLabel,
});
/// The test function.
/// Returns [true] if the current error message should be handled.
final GradleErrorTest test;
/// The handler function.
final Future<GradleBuildStatus> Function({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) handler;
/// The [BuildEvent] label is named gradle-[eventLabel].
/// If not empty, the build event is logged along with
/// additional metadata such as the attempt number.
final String? eventLabel;
}
/// The status of the Gradle build.
enum GradleBuildStatus {
/// The tool cannot recover from the failure and should exit.
exit,
/// The tool can retry the exact same build.
retry,
}
/// Returns a simple test function that evaluates to `true` if at least one of
/// `errorMessages` is contained in the error message.
GradleErrorTest _lineMatcher(List<String> errorMessages) {
return (String line) {
return errorMessages.any((String errorMessage) => line.contains(errorMessage));
};
}
/// The list of Gradle errors that the tool can handle.
///
/// The handlers are executed in the order in which they appear in the list.
///
/// Only the first error handler for which the [test] function returns [true]
/// is handled. As a result, sort error handlers based on how strict the [test]
/// function is to eliminate false positives.
final List<GradleHandledError> gradleErrors = <GradleHandledError>[
licenseNotAcceptedHandler,
networkErrorHandler,
permissionDeniedErrorHandler,
flavorUndefinedHandler,
r8FailureHandler,
minSdkVersionHandler,
transformInputIssueHandler,
lockFileDepMissingHandler,
multidexErrorHandler,
incompatibleKotlinVersionHandler,
minCompileSdkVersionHandler,
jvm11RequiredHandler,
outdatedGradleHandler,
sslExceptionHandler,
zipExceptionHandler,
incompatibleJavaAndGradleVersionsHandler,
remoteTerminatedHandshakeHandler,
couldNotOpenCacheDirectoryHandler,
];
const String _boxTitle = 'Flutter Fix';
// Multidex error message.
@visibleForTesting
final GradleHandledError multidexErrorHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:',
'The number of method references in a .dex file cannot exceed 64K.',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printStatus('${globals.logger.terminal.warningMark} App requires Multidex support', emphasis: true);
if (multidexEnabled) {
globals.printStatus(
'Multidex support is required for your android app to build since the number of methods has exceeded 64k. '
'See https://docs.flutter.dev/deployment/android#enabling-multidex-support for more information. '
"You may pass the --no-multidex flag to skip Flutter's multidex support to use a manual solution.\n",
indent: 4,
);
if (!androidManifestHasNameVariable(project.directory)) {
globals.printStatus(
r'Your `android/app/src/main/AndroidManifest.xml` does not contain `android:name="${applicationName}"` '
'under the `application` element. This may be due to creating your project with an old version of Flutter. '
'Add the `android:name="\${applicationName}"` attribute to your AndroidManifest.xml to enable Flutter\'s multidex support:\n',
indent: 4,
);
globals.printStatus(r'''
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
...
<application
...
android:name=''',
indent: 8,
newline: false,
color: TerminalColor.grey,
);
globals.printStatus(r'"${applicationName}"', color: TerminalColor.green, newline: true);
globals.printStatus(r'''
...>
''',
indent: 8,
color: TerminalColor.grey,
);
globals.printStatus(
'You may also roll your own multidex support by following the guide at: https://developer.android.com/studio/build/multidex\n',
indent: 4,
);
return GradleBuildStatus.exit;
}
if (!multiDexApplicationExists(project.directory)) {
globals.printStatus(
'Flutter tool can add multidex support. The following file will be added by flutter:\n',
indent: 4,
);
globals.printStatus(
'android/app/src/main/java/io/flutter/app/FlutterMultiDexApplication.java\n',
indent: 8,
);
String selection = 'n';
// Default to 'no' if no interactive terminal.
try {
selection = await globals.terminal.promptForCharInput(
<String>['y', 'n'],
logger: globals.logger,
prompt: 'Do you want to continue with adding multidex support for Android?',
defaultChoiceIndex: 0,
);
} on StateError catch (e) {
globals.printError(
e.message,
indent: 0,
);
}
if (selection == 'y') {
ensureMultiDexApplicationExists(project.directory);
globals.printStatus(
'Multidex enabled. Retrying build.\n',
indent: 0,
);
return GradleBuildStatus.retry;
}
}
} else {
globals.printBox(
'Flutter multidex handling is disabled. If you wish to let the tool configure multidex, use the --multidex flag.',
title: _boxTitle,
);
}
return GradleBuildStatus.exit;
},
eventLabel: 'multidex-error',
);
// Permission defined error message.
@visibleForTesting
final GradleHandledError permissionDeniedErrorHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'Permission denied',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printBox(
'${globals.logger.terminal.warningMark} Gradle does not have execution permission.\n'
'You should change the ownership of the project directory to your user, '
'or move the project to a directory with execute permissions.',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'permission-denied',
);
/// Gradle crashes for several known reasons when downloading that are not
/// actionable by Flutter.
@visibleForTesting
final GradleHandledError networkErrorHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'java.io.FileNotFoundException: https://downloads.gradle.org',
'java.io.IOException: Unable to tunnel through proxy',
'java.lang.RuntimeException: Timeout of',
'java.util.zip.ZipException: error in opening zip file',
'javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake',
'java.net.SocketException: Connection reset',
'java.io.FileNotFoundException',
"> Could not get resource 'http",
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printError(
'${globals.logger.terminal.warningMark} '
'Gradle threw an error while downloading artifacts from the network.'
);
return GradleBuildStatus.retry;
},
eventLabel: 'network',
);
/// Handles corrupted jar or other types of zip files.
///
/// If a terminal is attached, this handler prompts the user if they would like to
/// delete the $HOME/.gradle directory prior to retrying the build.
///
/// If this handler runs on a bot (e.g. a CI bot), the $HOME/.gradle is automatically deleted.
///
/// See also:
/// * https://github.com/flutter/flutter/issues/51195
/// * https://github.com/flutter/flutter/issues/89959
/// * https://docs.gradle.org/current/userguide/directory_layout.html#dir:gradle_user_home
@visibleForTesting
final GradleHandledError zipExceptionHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'java.util.zip.ZipException: error in opening zip file',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printError(
'${globals.logger.terminal.warningMark} '
'Your .gradle directory under the home directory might be corrupted.'
);
bool shouldDeleteUserGradle = await globals.botDetector.isRunningOnBot;
if (!shouldDeleteUserGradle && globals.terminal.stdinHasTerminal) {
try {
final String selection = await globals.terminal.promptForCharInput(
<String>['y', 'n'],
logger: globals.logger,
prompt: 'Do you want to delete the .gradle directory under the home directory?',
defaultChoiceIndex: 0,
);
shouldDeleteUserGradle = selection == 'y';
} on StateError catch (e) {
globals.printError(
e.message,
indent: 0,
);
}
}
if (shouldDeleteUserGradle) {
final String? homeDir = globals.platform.environment['HOME'];
if (homeDir == null) {
globals.logger.printStatus("Could not delete .gradle directory because there isn't a HOME env variable");
return GradleBuildStatus.retry;
}
final Directory userGradle = globals.fs.directory(globals.fs.path.join(homeDir, '.gradle'));
globals.logger.printStatus('Deleting ${userGradle.path}');
try {
ErrorHandlingFileSystem.deleteIfExists(userGradle, recursive: true);
} on FileSystemException catch (err) {
globals.printTrace('Failed to delete Gradle cache: $err');
}
}
return GradleBuildStatus.retry;
},
eventLabel: 'zip-exception',
);
// R8 failure.
@visibleForTesting
final GradleHandledError r8FailureHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'com.android.tools.r8',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printBox(
'${globals.logger.terminal.warningMark} The shrinker may have failed to optimize the Java bytecode.\n'
'To disable the shrinker, pass the `--no-shrink` flag to this command.\n'
'To learn more, see: https://developer.android.com/studio/build/shrink-code',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'r8',
);
/// Handle Gradle error thrown when Gradle needs to download additional
/// Android SDK components (e.g. Platform Tools), and the license
/// for that component has not been accepted.
@visibleForTesting
final GradleHandledError licenseNotAcceptedHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'You have not accepted the license agreements of the following SDK components',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
const String licenseNotAcceptedMatcher =
r'You have not accepted the license agreements of the following SDK components:\s*\[(.+)\]';
final RegExp licenseFailure = RegExp(licenseNotAcceptedMatcher, multiLine: true);
final Match? licenseMatch = licenseFailure.firstMatch(line);
globals.printBox(
'${globals.logger.terminal.warningMark} Unable to download needed Android SDK components, as the '
'following licenses have not been accepted: '
'${licenseMatch?.group(1)}\n\n'
'To resolve this, please run the following command in a Terminal:\n'
'flutter doctor --android-licenses',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'license-not-accepted',
);
final RegExp _undefinedTaskPattern = RegExp(r'Task .+ not found in root project.');
final RegExp _assembleTaskPattern = RegExp(r'assemble(\S+)');
/// Handler when a flavor is undefined.
@visibleForTesting
final GradleHandledError flavorUndefinedHandler = GradleHandledError(
test: (String line) {
return _undefinedTaskPattern.hasMatch(line);
},
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final RunResult tasksRunResult = await globals.processUtils.run(
<String>[
globals.gradleUtils!.getExecutable(project),
'app:tasks' ,
'--all',
'--console=auto',
],
throwOnError: true,
workingDirectory: project.android.hostAppGradleRoot.path,
environment: globals.java?.environment,
);
// Extract build types and product flavors.
final Set<String> variants = <String>{};
for (final String task in tasksRunResult.stdout.split('\n')) {
final Match? match = _assembleTaskPattern.matchAsPrefix(task);
if (match != null) {
final String variant = match.group(1)!.toLowerCase();
if (!variant.endsWith('test')) {
variants.add(variant);
}
}
}
final Set<String> productFlavors = <String>{};
for (final String variant1 in variants) {
for (final String variant2 in variants) {
if (variant2.startsWith(variant1) && variant2 != variant1) {
final String buildType = variant2.substring(variant1.length);
if (variants.contains(buildType)) {
productFlavors.add(variant1);
}
}
}
}
final String errorMessage = '${globals.logger.terminal.warningMark} Gradle project does not define a task suitable for the requested build.';
final File buildGradle = project.directory.childDirectory('android').childDirectory('app').childFile('build.gradle');
if (productFlavors.isEmpty) {
globals.printBox(
'$errorMessage\n\n'
'The ${buildGradle.absolute.path} file does not define '
'any custom product flavors. '
'You cannot use the --flavor option.',
title: _boxTitle,
);
} else {
globals.printBox(
'$errorMessage\n\n'
'The ${buildGradle.absolute.path} file defines product '
'flavors: ${productFlavors.join(', ')}. '
'You must specify a --flavor option to select one of them.',
title: _boxTitle,
);
}
return GradleBuildStatus.exit;
},
eventLabel: 'flavor-undefined',
);
final RegExp _minSdkVersionPattern = RegExp(r'uses-sdk:minSdkVersion ([0-9]+) cannot be smaller than version ([0-9]+) declared in library \[\:(.+)\]');
/// Handler when a plugin requires a higher Android API level.
@visibleForTesting
final GradleHandledError minSdkVersionHandler = GradleHandledError(
test: (String line) {
return _minSdkVersionPattern.hasMatch(line);
},
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final File gradleFile = project.directory
.childDirectory('android')
.childDirectory('app')
.childFile('build.gradle');
final Match? minSdkVersionMatch = _minSdkVersionPattern.firstMatch(line);
assert(minSdkVersionMatch?.groupCount == 3);
final String textInBold = globals.logger.terminal.bolden(
'Fix this issue by adding the following to the file ${gradleFile.path}:\n'
'android {\n'
' defaultConfig {\n'
' minSdkVersion ${minSdkVersionMatch?.group(2)}\n'
' }\n'
'}\n'
);
globals.printBox(
'The plugin ${minSdkVersionMatch?.group(3)} requires a higher Android SDK version.\n'
'$textInBold\n'
'Following this change, your app will not be available to users running Android SDKs below ${minSdkVersionMatch?.group(2)}.\n'
'Consider searching for a version of this plugin that supports these lower versions of the Android SDK instead.\n'
'For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'plugin-min-sdk',
);
/// Handler when https://issuetracker.google.com/issues/141126614 or
/// https://github.com/flutter/flutter/issues/58247 is triggered.
@visibleForTesting
final GradleHandledError transformInputIssueHandler = GradleHandledError(
test: (String line) {
return line.contains('https://issuetracker.google.com/issues/158753935');
},
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final File gradleFile = project.directory
.childDirectory('android')
.childDirectory('app')
.childFile('build.gradle');
final String textInBold = globals.logger.terminal.bolden(
'Fix this issue by adding the following to the file ${gradleFile.path}:\n'
'android {\n'
' lintOptions {\n'
' checkReleaseBuilds false\n'
' }\n'
'}'
);
globals.printBox(
'This issue appears to be https://github.com/flutter/flutter/issues/58247.\n'
'$textInBold',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'transform-input-issue',
);
/// Handler when a dependency is missing in the lockfile.
@visibleForTesting
final GradleHandledError lockFileDepMissingHandler = GradleHandledError(
test: (String line) {
return line.contains('which is not part of the dependency lock state');
},
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final File gradleFile = project.directory
.childDirectory('android')
.childFile('build.gradle');
final String textInBold = globals.logger.terminal.bolden(
'To regenerate the lockfiles run: `./gradlew :generateLockfiles` in ${gradleFile.path}\n'
'To remove dependency locking, remove the `dependencyLocking` from ${gradleFile.path}'
);
globals.printBox(
'You need to update the lockfile, or disable Gradle dependency locking.\n'
'$textInBold',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'lock-dep-issue',
);
@visibleForTesting
final GradleHandledError incompatibleKotlinVersionHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'was compiled with an incompatible version of Kotlin',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final File gradleFile = project.directory
.childDirectory('android')
.childFile('build.gradle');
globals.printBox(
'${globals.logger.terminal.warningMark} Your project requires a newer version of the Kotlin Gradle plugin.\n'
'Find the latest version on https://kotlinlang.org/docs/releases.html#release-details, then update ${gradleFile.path}:\n'
"ext.kotlin_version = '<latest-version>'",
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'incompatible-kotlin-version',
);
final RegExp _outdatedGradlePattern = RegExp(r'The current Gradle version (.+) is not compatible with the Kotlin Gradle plugin');
@visibleForTesting
final GradleHandledError outdatedGradleHandler = GradleHandledError(
test: _outdatedGradlePattern.hasMatch,
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final File gradleFile = project.directory
.childDirectory('android')
.childFile('build.gradle');
final File gradlePropertiesFile = project.directory
.childDirectory('android')
.childDirectory('gradle')
.childDirectory('wrapper')
.childFile('gradle-wrapper.properties');
globals.printBox(
'${globals.logger.terminal.warningMark} Your project needs to upgrade Gradle and the Android Gradle plugin.\n\n'
'To fix this issue, replace the following content:\n'
'${gradleFile.path}:\n'
' ${globals.terminal.color("- classpath 'com.android.tools.build:gradle:<current-version>'", TerminalColor.red)}\n'
' ${globals.terminal.color("+ classpath 'com.android.tools.build:gradle:$templateAndroidGradlePluginVersion'", TerminalColor.green)}\n'
'${gradlePropertiesFile.path}:\n'
' ${globals.terminal.color('- https://services.gradle.org/distributions/gradle-<current-version>-all.zip', TerminalColor.red)}\n'
' ${globals.terminal.color('+ https://services.gradle.org/distributions/gradle-$templateDefaultGradleVersion-all.zip', TerminalColor.green)}',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'outdated-gradle-version',
);
final RegExp _minCompileSdkVersionPattern = RegExp(r'The minCompileSdk \(([0-9]+)\) specified in a');
@visibleForTesting
final GradleHandledError minCompileSdkVersionHandler = GradleHandledError(
test: _minCompileSdkVersionPattern.hasMatch,
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
final Match? minCompileSdkVersionMatch = _minCompileSdkVersionPattern.firstMatch(line);
assert(minCompileSdkVersionMatch?.groupCount == 1);
final File gradleFile = project.directory
.childDirectory('android')
.childDirectory('app')
.childFile('build.gradle');
globals.printBox(
'${globals.logger.terminal.warningMark} Your project requires a higher compileSdkVersion.\n'
'Fix this issue by bumping the compileSdkVersion in ${gradleFile.path}:\n'
'android {\n'
' compileSdkVersion ${minCompileSdkVersionMatch?.group(1)}\n'
'}',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'min-compile-sdk-version',
);
@visibleForTesting
final GradleHandledError jvm11RequiredHandler = GradleHandledError(
test: (String line) {
return line.contains('Android Gradle plugin requires Java 11 to run');
},
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printBox(
'${globals.logger.terminal.warningMark} You need Java 11 or higher to build your app with this version of Gradle.\n\n'
'To get Java 11, update to the latest version of Android Studio on https://developer.android.com/studio/install.\n\n'
'To check the Java version used by Flutter, run `flutter doctor -v`.',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'java11-required',
);
/// Handles SSL exceptions: https://github.com/flutter/flutter/issues/104628
@visibleForTesting
final GradleHandledError sslExceptionHandler = GradleHandledError(
test: _lineMatcher(const <String>[
'javax.net.ssl.SSLException: Tag mismatch!',
'javax.crypto.AEADBadTagException: Tag mismatch!',
]),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printError(
'${globals.logger.terminal.warningMark} '
'Gradle threw an error while downloading artifacts from the network.'
);
return GradleBuildStatus.retry;
},
eventLabel: 'ssl-exception-tag-mismatch',
);
/// If an incompatible Java and Gradle versions error is caught, we expect an
/// error specifying that the Java major class file version, one of
/// https://javaalmanac.io/bytecode/versions/, is unsupported by Gradle.
final RegExp _unsupportedClassFileMajorVersionPattern = RegExp(r'Unsupported class file major version\s+\d+');
@visibleForTesting
final GradleHandledError incompatibleJavaAndGradleVersionsHandler = GradleHandledError(
test: (String line) {
return _unsupportedClassFileMajorVersionPattern.hasMatch(line);
},
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
// TODO(reidbaker): Replace URL with constant defined in
// https://github.com/flutter/flutter/pull/123916.
globals.printBox(
"${globals.logger.terminal.warningMark} Your project's Gradle version "
'is incompatible with the Java version that Flutter is using for Gradle.\n\n'
'To fix this issue, consult the migration guide at docs.flutter.dev/go/android-java-gradle-error.',
title: _boxTitle,
);
return GradleBuildStatus.exit;
},
eventLabel: 'incompatible-java-gradle-version',
);
@visibleForTesting
final GradleHandledError remoteTerminatedHandshakeHandler = GradleHandledError(
test: (String line) => line.contains('Remote host terminated the handshake'),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printError(
'${globals.logger.terminal.warningMark} '
'Gradle threw an error while downloading artifacts from the network.'
);
return GradleBuildStatus.retry;
},
eventLabel: 'remote-terminated-handshake',
);
@visibleForTesting
final GradleHandledError couldNotOpenCacheDirectoryHandler = GradleHandledError(
test: (String line) => line.contains('> Could not open cache directory '),
handler: ({
required String line,
required FlutterProject project,
required bool usesAndroidX,
required bool multidexEnabled,
}) async {
globals.printError(
'${globals.logger.terminal.warningMark} '
'Gradle threw an error while resolving dependencies.'
);
return GradleBuildStatus.retry;
},
eventLabel: 'could-not-open-cache-directory',
);