Files
flutter/packages/flutter_tools/gradle/src/main/groovy/flutter.groovy
Gray Mackall e971379436 Convert AppPluginLoaderPlugin to Kotlin, and add NativePluginLoaderReflectionBridge to expose it in Kotlin (#166027)
Graph [stolen from Barteks
comment](https://github.com/flutter/flutter/pull/161352#issuecomment-2611252732)
documenting the existing (pre pr) state:

```mermaid
graph TD;
  flutter.groovy -- import --> native_plugin_loader.groovy;
  flutter.groovy -- import --> BaseApplicationNameHandler.kt;
  module_plugin_loader.groovy -- "ext" --> native_plugin_loader.groovy;
  app_plugin_loader.groovy  -- import --> native_plugin_loader.groovy;
  include_flutter.groovy -- "apply from: " --> module_plugin_loader.groovy;
```
1. Converts the `app_plugin_loader.groovy` to kotlin source. 
2. Converts the `module_plugin_loader.groovy` to kotlin script. This
can't be changed to kotlin source yet, as we will need to instruct users
to make a change to their host app-level gradle files before we can turn
down script application of this separate gradle plugin. This is a
breaking change, and will need a quarter at least of notice.
3. Unfortunately, the main Flutter Gradle plugin depends on being able
to call methods of the `native_plugin_loader`, which we could do in
groovy via wacky dynamic behavior, calling across the compiled
plugin->script plugin barrier. We can't do this in Kotlin source, and we
also can't fully convert `native_plugin_loader` to kotlin source yet
because of (2), so I've added a `NativePluginLoaderReflectionBridge`
that allows us to access the methods in the
`native_plugin_loader.gradle.kts` from the Kotlin source files, calling
across the compiled plugin->script plugin barrier as we were before.

The plan here is
1. to follow up by adding a converted `native_plugin_loader.gradle.kts`
in Kotlin source, and migrating all paths but the host-app using a
module-as-source to use the converted approach (but not deleting the old
way)
2. maintaining both ways for a release or two, with the script
application printing a message notifying users to update to the
non-script based application of the `module_plugin_loader`.
3. Then we can delete the script based apply, and also the reflection
bridge.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

---------

Co-authored-by: Gray Mackall <mackall@google.com>
2025-04-02 20:29:13 +00:00

723 lines
39 KiB
Groovy

/* groovylint-disable LineLength, UnnecessaryGString, UnnecessaryGetter */
// 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 com.android.build.OutputFile
import com.android.build.gradle.AbstractAppExtension
import com.android.build.gradle.api.BaseVariantOutput
import com.android.build.gradle.tasks.PackageAndroidArtifact
import com.android.build.gradle.tasks.ProcessAndroidResources
import com.android.builder.model.BuildType
import com.flutter.gradle.BaseApplicationNameHandler
import com.flutter.gradle.DependencyVersionChecker
import com.flutter.gradle.FlutterExtension
import com.flutter.gradle.FlutterPluginConstants
import com.flutter.gradle.FlutterTask
import com.flutter.gradle.FlutterPluginUtils
import com.flutter.gradle.NativePluginLoaderReflectionBridge
import org.gradle.api.file.Directory
import java.nio.file.Paths
import org.apache.tools.ant.taskdefs.condition.Os
import org.gradle.api.GradleException
import org.gradle.api.JavaVersion
import org.gradle.api.Project
import org.gradle.api.Plugin
import org.gradle.api.Task
import org.gradle.api.UnknownTaskException
import org.gradle.api.tasks.Copy
import org.gradle.api.tasks.TaskProvider
import org.gradle.api.tasks.bundling.Jar
import org.gradle.internal.os.OperatingSystem
class FlutterPlugin implements Plugin<Project> {
private final static String propLocalEngineRepo = "local-engine-repo"
/**
* The name prefix for flutter builds. This is used to identify gradle tasks
* where we expect the flutter tool to provide any error output, and skip the
* standard Gradle error output in the FlutterEventLogger. If you change this,
* be sure to change any instances of this string in symbols in the code below
* to match.
*/
static final String FLUTTER_BUILD_PREFIX = "flutterBuild"
private Project project
private File flutterRoot
private File flutterExecutable
private String localEngine
private String localEngineHost
private String localEngineSrcPath
private Properties localProperties
private String engineVersion
private String engineRealm
private List<Map<String, Object>> pluginList
private List<Map<String, Object>> pluginDependencies
/**
* Flutter Docs Website URLs for help messages.
*/
private final String kWebsiteDeploymentAndroidBuildConfig = "https://flutter.dev/to/review-gradle-config"
@Override
void apply(Project project) {
this.project = project
Project rootProject = project.rootProject
if (FlutterPluginUtils.isFlutterAppProject(project)) {
rootProject.tasks.register("generateLockfiles") {
doLast {
rootProject.subprojects.each { subproject ->
String gradlew = (OperatingSystem.current().isWindows()) ?
"${rootProject.projectDir}/gradlew.bat" : "${rootProject.projectDir}/gradlew"
rootProject.exec {
workingDir(rootProject.projectDir)
executable(gradlew)
args(":${subproject.name}:dependencies", "--write-locks")
}
}
}
}
}
String flutterRootPath = resolveProperty("flutter.sdk", System.getenv("FLUTTER_ROOT"))
if (flutterRootPath == null) {
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file or with a FLUTTER_ROOT environment variable.")
}
flutterRoot = project.file(flutterRootPath)
if (!flutterRoot.isDirectory()) {
throw new GradleException("flutter.sdk must point to the Flutter SDK directory")
}
engineVersion = FlutterPluginUtils.shouldProjectUseLocalEngine(project)
? "+" // Match any version since there's only one.
: "1.0.0-" + Paths.get(flutterRoot.absolutePath, "bin", "cache", "engine.stamp").toFile().text.trim()
engineRealm = Paths.get(flutterRoot.absolutePath, "bin", "cache", "engine.realm").toFile().text.trim()
if (engineRealm) {
engineRealm += "/"
}
// Configure the Maven repository.
String hostedRepository = System.getenv(FlutterPluginConstants.FLUTTER_STORAGE_BASE_URL) ?: FlutterPluginConstants.DEFAULT_MAVEN_HOST
String repository = FlutterPluginUtils.shouldProjectUseLocalEngine(project)
? project.property(propLocalEngineRepo)
: "$hostedRepository/${engineRealm}download.flutter.io"
rootProject.allprojects {
repositories {
maven {
url(repository)
}
}
}
// Load shared gradle functions
project.apply from: Paths.get(flutterRoot.absolutePath, "packages", "flutter_tools", "gradle", "src", "main", "scripts", "native_plugin_loader.gradle.kts")
FlutterExtension extension = project.extensions.create("flutter", FlutterExtension)
Properties localProperties = new Properties()
File localPropertiesFile = rootProject.file("local.properties")
if (localPropertiesFile.exists()) {
localPropertiesFile.withReader("UTF-8") { reader ->
localProperties.load(reader)
}
}
extension.flutterVersionCode = localProperties.getProperty("flutter.versionCode", "1")
extension.flutterVersionName = localProperties.getProperty("flutter.versionName", "1.0")
this.addFlutterTasks(project)
FlutterPluginUtils.forceNdkDownload(project, flutterRootPath)
// By default, assembling APKs generates fat APKs if multiple platforms are passed.
// Configuring split per ABI allows to generate separate APKs for each abi.
// This is a noop when building a bundle.
if (FlutterPluginUtils.shouldProjectSplitPerAbi(project)) {
project.android {
splits {
abi {
// Enables building multiple APKs per ABI.
enable(true)
// Resets the list of ABIs that Gradle should create APKs for to none.
reset()
// Specifies that we do not want to also generate a universal APK that includes all ABIs.
universalApk(false)
}
}
}
}
final String propDeferredComponentNames = "deferred-component-names"
if (project.hasProperty(propDeferredComponentNames)) {
String[] componentNames = project.property(propDeferredComponentNames).split(",").collect {":${it}"}
project.android {
dynamicFeatures = componentNames
}
}
FlutterPluginUtils.getTargetPlatforms(project).each { targetArch ->
String abiValue = FlutterPluginConstants.PLATFORM_ARCH_MAP[targetArch]
project.android {
if (FlutterPluginUtils.shouldProjectSplitPerAbi(project)) {
splits {
abi {
include(abiValue)
}
}
}
}
}
String flutterExecutableName = Os.isFamily(Os.FAMILY_WINDOWS) ? "flutter.bat" : "flutter"
flutterExecutable = Paths.get(flutterRoot.absolutePath, "bin", flutterExecutableName).toFile()
// Validate that the provided Gradle, Java, AGP, and KGP versions are all within our
// supported range.
// TODO(gmackall) Dependency version checking is currently implemented as an additional
// Gradle plugin because we can't import it from Groovy code. As part of the Groovy
// -> Kotlin migration, we should remove this complexity and perform the checks inside
// of the main Flutter Gradle Plugin.
// See https://github.com/flutter/flutter/issues/121541#issuecomment-1920363687.
final Boolean shouldSkipDependencyChecks = project.hasProperty("skipDependencyChecks") && project.getProperty("skipDependencyChecks")
if (!shouldSkipDependencyChecks) {
try {
DependencyVersionChecker.checkDependencyVersions(project)
} catch (Exception e) {
if (!project.hasProperty("usesUnsupportedDependencyVersions") || !project.usesUnsupportedDependencyVersions) {
// Possible bug in dependency checking code - warn and do not block build.
project.logger.error("Warning: Flutter was unable to detect project Gradle, Java, " +
"AGP, and KGP versions. Skipping dependency version checking. Error was: "
+ e)
}
else {
// If usesUnsupportedDependencyVersions is set, the exception was thrown by us
// in the dependency version checker plugin so re-throw it here.
throw e
}
}
}
// Use Kotlin source to handle baseApplicationName logic due to Groovy dynamic dispatch bug.
BaseApplicationNameHandler.setBaseName(project)
String flutterProguardRules = Paths.get(flutterRoot.absolutePath, "packages", "flutter_tools",
"gradle", "flutter_proguard_rules.pro")
project.android.buildTypes {
// Add profile build type.
profile {
initWith(debug)
if (it.hasProperty("matchingFallbacks")) {
matchingFallbacks = ["debug", "release"]
}
}
// TODO(garyq): Shrinking is only false for multi apk split aot builds, where shrinking is not allowed yet.
// This limitation has been removed experimentally in gradle plugin version 4.2, so we can remove
// this check when we upgrade to 4.2+ gradle. Currently, deferred components apps may see
// increased app size due to this.
if (FlutterPluginUtils.shouldShrinkResources(project)) {
release {
// Enables code shrinking, obfuscation, and optimization for only
// your project's release build type.
minifyEnabled(true)
// Enables resource shrinking, which is performed by the Android Gradle plugin.
// The resource shrinker can't be used for libraries.
shrinkResources(FlutterPluginUtils.isBuiltAsApp(project))
// Fallback to `android/app/proguard-rules.pro`.
// This way, custom Proguard rules can be configured as needed.
proguardFiles(project.android.getDefaultProguardFile("proguard-android-optimize.txt"), flutterProguardRules, "proguard-rules.pro")
}
}
}
if (FlutterPluginUtils.shouldProjectUseLocalEngine(project)) {
// This is required to pass the local engine to flutter build aot.
String engineOutPath = project.property("local-engine-out")
File engineOut = project.file(engineOutPath)
if (!engineOut.isDirectory()) {
throw new GradleException("local-engine-out must point to a local engine build")
}
localEngine = engineOut.name
localEngineSrcPath = engineOut.parentFile.parent
String engineHostOutPath = project.property("local-engine-host-out")
File engineHostOut = project.file(engineHostOutPath)
if (!engineHostOut.isDirectory()) {
throw new GradleException("local-engine-host-out must point to a local engine host build")
}
localEngineHost = engineHostOut.name
}
project.android.buildTypes.all(this.&addFlutterDependencies)
}
/**
* Adds the dependencies required by the Flutter project.
* This includes:
* 1. The embedding
* 2. libflutter.so
*/
void addFlutterDependencies(BuildType buildType) {
FlutterPluginUtils.addFlutterDependencies(project, buildType, getPluginList(project), engineVersion)
}
/**
* Configures the Flutter plugin dependencies.
*
* The plugins are added to pubspec.yaml. Then, upon running `flutter pub get`,
* the tool generates a `.flutter-plugins-dependencies` file, which contains a map to each plugin location.
* Finally, the project's `settings.gradle` loads each plugin's android directory as a subproject.
*/
private void configurePlugins(Project project) {
configureLegacyPluginEachProjects(project)
getPluginList(project).each { Map<String, Object> plugin ->
FlutterPluginUtils.configurePluginProject(project, plugin, engineVersion)
}
getPluginList(project).each {Map<String, Object> plugin ->
FlutterPluginUtils.configurePluginDependencies(project, plugin)
}
}
// TODO(54566, 48918): Can remove once the issues are resolved.
// This means all references to `.flutter-plugins` are then removed and
// apps only depend exclusively on the `plugins` property in `.flutter-plugins-dependencies`.
/**
* Workaround to load non-native plugins for developers who may still use an
* old `settings.gradle` which includes all the plugins from the
* `.flutter-plugins` file, even if not made for Android.
* The settings.gradle then:
* 1) tries to add the android plugin implementation, which does not
* exist at all, but is also not included successfully
* (which does not throw an error and therefore isn't a problem), or
* 2) includes the plugin successfully as a valid android plugin
* directory exists, even if the surrounding flutter package does not
* support the android platform (see e.g. apple_maps_flutter: 1.0.1).
* So as it's included successfully it expects to be added as API.
* This is only possible by taking all plugins into account, which
* only appear on the `dependencyGraph` and in the `.flutter-plugins` file.
* So in summary the plugins are currently selected from the `dependencyGraph`
* and filtered then with the [doesSupportAndroidPlatform] method instead of
* just using the `plugins.android` list.
*/
static private void configureLegacyPluginEachProjects(Project project) {
try {
// Read the contents of the settings.gradle file.
// Remove block/line comments
String settingsText = FlutterPluginUtils.getSettingsGradleFileFromProjectDir(project.projectDir, project.logger).text
settingsText = settingsText.replaceAll(/(?s)\/\*.*?\*\//, '').replaceAll(/(?m)\/\/.*$/, '')
if (!settingsText.contains("'.flutter-plugins'")) {
return
}
} catch (FileNotFoundException ignored) {
throw new GradleException("settings.gradle/settings.gradle.kts does not exist: " +
"${FlutterPluginUtils.getSettingsGradleFileFromProjectDir(project.projectDir, project.logger).absolutePath}")
}
// TODO(matanlurey): https://github.com/flutter/flutter/issues/48918.
project.logger.quiet("Warning: This project is still reading the deprecated '.flutter-plugins. file.")
project.logger.quiet("In an upcoming stable release support for this file will be completely removed and your build will fail.")
project.logger.quiet("See https:/flutter.dev/to/flutter-plugins-configuration.")
List<Map<String, Object>> deps = getPluginDependencies(project)
List<String> plugins = getPluginList(project).collect { it.name as String }
deps.removeIf { plugins.contains(it.name) }
deps.each {
Project pluginProject = project.rootProject.findProject(":${it.name}")
if (pluginProject == null) {
// Plugin was not included in `settings.gradle`, but is listed in `.flutter-plugins`.
project.logger.error("Plugin project :${it.name} listed, but not found. Please fix your settings.gradle/settings.gradle.kts.")
} else if (FlutterPluginUtils.pluginSupportsAndroidPlatform(pluginProject)) {
// Plugin has a functioning `android` folder and is included successfully, although it's not supported.
// It must be configured nonetheless, to not throw an "Unresolved reference" exception.
FlutterPluginUtils.configurePluginProject(project, it, engineVersion)
/* groovylint-disable-next-line EmptyElseBlock */
} else {
// Plugin has no or an empty `android` folder. No action required.
}
}
}
/**
* Gets the list of plugins (as map) that support the Android platform.
*
* The map value contains either the plugins `name` (String),
* its `path` (String), or its `dependencies` (List<String>).
* See [NativePluginLoader#getPlugins] in packages/flutter_tools/gradle/src/main/scripts/native_plugin_loader.gradle.kts
*/
private List<Map<String, Object>> getPluginList(Project project) {
if (pluginList == null) {
pluginList = NativePluginLoaderReflectionBridge.getPlugins(project.ext, FlutterPluginUtils.getFlutterSourceDirectory(project))
}
return pluginList
}
// TODO(54566, 48918): Remove in favor of [getPluginList] only, see also
// https://github.com/flutter/flutter/blob/1c90ed8b64d9ed8ce2431afad8bc6e6d9acc4556/packages/flutter_tools/lib/src/flutter_plugins.dart#L212
/** Gets the plugins dependencies from `.flutter-plugins-dependencies`. */
private List<Map<String, Object>> getPluginDependencies(Project project) {
if (pluginDependencies == null) {
Map meta = NativePluginLoaderReflectionBridge.getDependenciesMetadata(project.ext, FlutterPluginUtils.getFlutterSourceDirectory(project))
if (meta == null) {
pluginDependencies = []
} else {
assert(meta.dependencyGraph instanceof List<Map>)
pluginDependencies = meta.dependencyGraph as List<Map<String, Object>>
}
}
return pluginDependencies
}
private String resolveProperty(String name, String defaultValue) {
if (localProperties == null) {
localProperties = FlutterPluginUtils.readPropertiesIfExist(new File(project.projectDir.parentFile, "local.properties"))
}
return project.findProperty(name) ?: localProperties?.getProperty(name, defaultValue)
}
private void addFlutterTasks(Project project) {
if (project.state.failure) {
return
}
String[] fileSystemRootsValue = null
final String propFileSystemRoots = "filesystem-roots"
if (project.hasProperty(propFileSystemRoots)) {
fileSystemRootsValue = project.property(propFileSystemRoots).split("\\|")
}
String fileSystemSchemeValue = null
final String propFileSystemScheme = "filesystem-scheme"
if (project.hasProperty(propFileSystemScheme)) {
fileSystemSchemeValue = project.property(propFileSystemScheme)
}
Boolean trackWidgetCreationValue = true
final String propTrackWidgetCreation = "track-widget-creation"
if (project.hasProperty(propTrackWidgetCreation)) {
trackWidgetCreationValue = project.property(propTrackWidgetCreation).toBoolean()
}
String frontendServerStarterPathValue = null
final String propFrontendServerStarterPath = "frontend-server-starter-path"
if (project.hasProperty(propFrontendServerStarterPath)) {
frontendServerStarterPathValue = project.property(propFrontendServerStarterPath)
}
String extraFrontEndOptionsValue = null
final String propExtraFrontEndOptions = "extra-front-end-options"
if (project.hasProperty(propExtraFrontEndOptions)) {
extraFrontEndOptionsValue = project.property(propExtraFrontEndOptions)
}
String extraGenSnapshotOptionsValue = null
final String propExtraGenSnapshotOptions = "extra-gen-snapshot-options"
if (project.hasProperty(propExtraGenSnapshotOptions)) {
extraGenSnapshotOptionsValue = project.property(propExtraGenSnapshotOptions)
}
String splitDebugInfoValue = null
final String propSplitDebugInfo = "split-debug-info"
if (project.hasProperty(propSplitDebugInfo)) {
splitDebugInfoValue = project.property(propSplitDebugInfo)
}
Boolean dartObfuscationValue = false
final String propDartObfuscation = "dart-obfuscation"
if (project.hasProperty(propDartObfuscation)) {
dartObfuscationValue = project.property(propDartObfuscation).toBoolean()
}
Boolean treeShakeIconsOptionsValue = false
final String propTreeShakeIcons = "tree-shake-icons"
if (project.hasProperty(propTreeShakeIcons)) {
treeShakeIconsOptionsValue = project.property(propTreeShakeIcons).toBoolean()
}
String dartDefinesValue = null
final String propDartDefines = "dart-defines"
if (project.hasProperty(propDartDefines)) {
dartDefinesValue = project.property(propDartDefines)
}
String performanceMeasurementFileValue
final String propPerformanceMeasurementFile = "performance-measurement-file"
if (project.hasProperty(propPerformanceMeasurementFile)) {
performanceMeasurementFileValue = project.property(propPerformanceMeasurementFile)
}
String codeSizeDirectoryValue
final String propCodeSizeDirectory = "code-size-directory"
if (project.hasProperty(propCodeSizeDirectory)) {
codeSizeDirectoryValue = project.property(propCodeSizeDirectory)
}
Boolean deferredComponentsValue = false
final String propDeferredComponents = "deferred-components"
if (project.hasProperty(propDeferredComponents)) {
deferredComponentsValue = project.property(propDeferredComponents).toBoolean()
}
Boolean validateDeferredComponentsValue = true
final String propValidateDeferredComponents = "validate-deferred-components"
if (project.hasProperty(propValidateDeferredComponents)) {
validateDeferredComponentsValue = project.property(propValidateDeferredComponents).toBoolean()
}
FlutterPluginUtils.addTaskForJavaVersion(project)
if (FlutterPluginUtils.isFlutterAppProject(project)) {
FlutterPluginUtils.addTaskForPrintBuildVariants(project)
FlutterPluginUtils.addTasksForOutputsAppLinkSettings(project)
}
List<String> targetPlatforms = FlutterPluginUtils.getTargetPlatforms(project)
def addFlutterDeps = { variant ->
if (FlutterPluginUtils.shouldProjectSplitPerAbi(project)) {
variant.outputs.each { output ->
// Assigns the new version code to versionCodeOverride, which changes the version code
// for only the output APK, not for the variant itself. Skipping this step simply
// causes Gradle to use the value of variant.versionCode for the APK.
// For more, see https://developer.android.com/studio/build/configure-apk-splits
Integer abiVersionCode = FlutterPluginConstants.ABI_VERSION[output.getFilter(OutputFile.ABI)]
if (abiVersionCode != null) {
output.versionCodeOverride =
abiVersionCode * 1000 + variant.versionCode
}
}
}
// Build an AAR when this property is defined.
boolean isBuildingAar = project.hasProperty("is-plugin")
// In add to app scenarios, a Gradle project contains a `:flutter` and `:app` project.
// `:flutter` is used as a subproject when these tasks exists and the build isn't building an AAR.
Task packageAssets
Task cleanPackageAssets
try {
packageAssets = project.tasks.named("package${variant.name.capitalize()}Assets").get()
} catch (UnknownTaskException ignored) {
packageAssets = null
}
try {
cleanPackageAssets = project.tasks.named("cleanPackage${variant.name.capitalize()}Assets").get()
} catch (UnknownTaskException ignored) {
cleanPackageAssets = null
}
boolean isUsedAsSubproject = packageAssets && cleanPackageAssets && !isBuildingAar
String variantBuildMode = FlutterPluginUtils.buildModeFor(variant.buildType)
String flavorValue = variant.getFlavorName()
String taskName = FlutterPluginUtils.toCamelCase(["compile", FLUTTER_BUILD_PREFIX, variant.name])
// Be careful when configuring task below, Groovy has bizarre
// scoping rules: writing `verbose isVerbose()` means calling
// `isVerbose` on the task itself - which would return `verbose`
// original value. You either need to hoist the value
// into a separate variable `verbose verboseValue` or prefix with
// `this` (`verbose this.isVerbose()`).
TaskProvider<FlutterTask> compileTaskProvider = project.tasks.register(taskName , FlutterTask) {
flutterRoot(this.flutterRoot)
flutterExecutable(this.flutterExecutable)
buildMode(variantBuildMode)
minSdkVersion(variant.mergedFlavor.minSdkVersion.apiLevel)
localEngine(this.localEngine)
localEngineHost(this.localEngineHost)
localEngineSrcPath(this.localEngineSrcPath)
targetPath(FlutterPluginUtils.getFlutterTarget(project))
verbose(FlutterPluginUtils.isProjectVerbose(project))
fastStart(FlutterPluginUtils.isProjectFastStart(project))
fileSystemRoots(fileSystemRootsValue)
fileSystemScheme(fileSystemSchemeValue)
trackWidgetCreation(trackWidgetCreationValue)
targetPlatformValues = targetPlatforms
sourceDir(FlutterPluginUtils.getFlutterSourceDirectory(project))
intermediateDir(project.file(project.layout.buildDirectory.dir("${FlutterPluginConstants.INTERMEDIATES_DIR}/flutter/${variant.name}/")))
frontendServerStarterPath(frontendServerStarterPathValue)
extraFrontEndOptions(extraFrontEndOptionsValue)
extraGenSnapshotOptions(extraGenSnapshotOptionsValue)
splitDebugInfo(splitDebugInfoValue)
treeShakeIcons(treeShakeIconsOptionsValue)
dartObfuscation(dartObfuscationValue)
dartDefines(dartDefinesValue)
performanceMeasurementFile(performanceMeasurementFileValue)
codeSizeDirectory(codeSizeDirectoryValue)
deferredComponents(deferredComponentsValue)
validateDeferredComponents(validateDeferredComponentsValue)
flavor(flavorValue)
}
Task compileTask = compileTaskProvider.get()
File libJar = project.file(project.layout.buildDirectory.dir("${FlutterPluginConstants.INTERMEDIATES_DIR}/flutter/${variant.name}/libs.jar"))
TaskProvider<Jar> packJniLibsTaskProvider = project.tasks.register("packJniLibs${FLUTTER_BUILD_PREFIX}${variant.name.capitalize()}", Jar) {
destinationDirectory = libJar.parentFile
archiveFileName = libJar.name
dependsOn(compileTask)
targetPlatforms.each { targetPlatform ->
String abi = FlutterPluginConstants.PLATFORM_ARCH_MAP[targetPlatform]
from("${compileTask.intermediateDir}/${abi}") {
include("*.so")
// Move `app.so` to `lib/<abi>/libapp.so`
rename { String filename ->
return "lib/${abi}/lib${filename}"
}
}
// Copy the native assets created by build.dart and placed in build/native_assets by flutter assemble.
// The `$project.layout.buildDirectory` is '.android/Flutter/build/' instead of 'build/'.
String buildDir = "${FlutterPluginUtils.getFlutterSourceDirectory(project)}/build"
String nativeAssetsDir = "${buildDir}/native_assets/android/jniLibs/lib"
from("${nativeAssetsDir}/${abi}") {
include("*.so")
rename { String filename ->
return "lib/${abi}/${filename}"
}
}
}
}
Task packJniLibsTask = packJniLibsTaskProvider.get()
FlutterPluginUtils.addApiDependencies(project, variant.name, project.files {
packJniLibsTask
})
TaskProvider<Copy> copyFlutterAssetsTaskProvider = project.tasks.register(
"copyFlutterAssets${variant.name.capitalize()}" , Copy
) {
dependsOn(compileTask)
with(compileTask.assets)
String currentGradleVersion = project.getGradle().getGradleVersion()
// See https://docs.gradle.org/current/javadoc/org/gradle/api/file/ConfigurableFilePermissions.html
// See https://github.com/flutter/flutter/pull/50047
if (FlutterPluginUtils.compareVersionStrings(currentGradleVersion, "8.3") >= 0) {
filePermissions {
user {
read = true
write = true
}
}
} else {
// See https://docs.gradle.org/8.2/dsl/org.gradle.api.tasks.Copy.html#org.gradle.api.tasks.Copy:fileMode
// See https://github.com/flutter/flutter/pull/50047
fileMode(0644)
}
if (isUsedAsSubproject) {
dependsOn(packageAssets)
dependsOn(cleanPackageAssets)
into(packageAssets.outputDir)
return
}
// `variant.mergeAssets` will be removed at the end of 2019.
def mergeAssets = variant.hasProperty("mergeAssetsProvider") ?
variant.mergeAssetsProvider.get() : variant.mergeAssets
dependsOn(mergeAssets)
dependsOn("clean${mergeAssets.name.capitalize()}")
mergeAssets.mustRunAfter("clean${mergeAssets.name.capitalize()}")
into(mergeAssets.outputDir)
}
Task copyFlutterAssetsTask = copyFlutterAssetsTaskProvider.get()
if (!isUsedAsSubproject) {
def variantOutput = variant.outputs.first()
def processResources = variantOutput.hasProperty(FlutterPluginConstants.PROP_PROCESS_RESOURCES_PROVIDER) ?
variantOutput.processResourcesProvider.get() : variantOutput.processResources
processResources.dependsOn(copyFlutterAssetsTask)
}
// The following tasks use the output of copyFlutterAssetsTask,
// so it's necessary to declare it as an dependency since Gradle 8.
// See https://docs.gradle.org/8.1/userguide/validation_problems.html#implicit_dependency.
def tasksToCheck = [
"compress${variant.name.capitalize()}Assets",
"bundle${variant.name.capitalize()}Aar",
"bundle${variant.name.capitalize()}LocalLintAar"
]
tasksToCheck.each { taskTocheck ->
try {
project.tasks.named(taskTocheck).configure { task ->
task.dependsOn(copyFlutterAssetsTask)
}
} catch (UnknownTaskException ignored) {
}
}
return copyFlutterAssetsTask
} // end def addFlutterDeps
if (FlutterPluginUtils.isFlutterAppProject(project)) {
AbstractAppExtension android = (AbstractAppExtension) project.extensions.findByName("android")
android.applicationVariants.configureEach { variant ->
Task assembleTask = variant.assembleProvider.get()
if (!FlutterPluginUtils.shouldConfigureFlutterTask(project, assembleTask)) {
return
}
Task copyFlutterAssetsTask = addFlutterDeps(variant)
BaseVariantOutput variantOutput = variant.outputs.first()
ProcessAndroidResources processResources = variantOutput.hasProperty(FlutterPluginConstants.PROP_PROCESS_RESOURCES_PROVIDER) ?
variantOutput.processResourcesProvider.get() : variantOutput.processResources
processResources.dependsOn(copyFlutterAssetsTask)
// Copy the output APKs into a known location, so `flutter run` or `flutter build apk`
// can discover them. By default, this is `<app-dir>/build/app/outputs/flutter-apk/<filename>.apk`.
//
// The filename consists of `app<-abi>?<-flavor-name>?-<build-mode>.apk`.
// Where:
// * `abi` can be `armeabi-v7a|arm64-v8a|x86|x86_64` only if the flag `split-per-abi` is set.
// * `flavor-name` is the flavor used to build the app in lower case if the assemble task is called.
// * `build-mode` can be `release|debug|profile`.
variant.outputs.each { output ->
assembleTask.doLast {
PackageAndroidArtifact packageApplicationProvider = variant.packageApplicationProvider.get()
Directory outputDirectory = packageApplicationProvider.outputDirectory.get()
String outputDirectoryStr = outputDirectory.toString()
String filename = "app"
String abi = output.getFilter(OutputFile.ABI)
if (abi != null && !abi.isEmpty()) {
filename += "-${abi}"
}
if (variant.flavorName != null && !variant.flavorName.isEmpty()) {
filename += "-${variant.flavorName.toLowerCase()}"
}
filename += "-${FlutterPluginUtils.buildModeFor(variant.buildType)}"
project.copy {
from new File("$outputDirectoryStr/${output.outputFileName}")
into new File("${project.layout.buildDirectory.dir("outputs/flutter-apk").get()}")
rename {
return "${filename}.apk"
}
}
}
}
}
// Copy the native assets created by build.dart and placed here by flutter assemble.
// This path is not flavor specific and must only be added once.
// If support for flavors is added to native assets, then they must only be added
// once per flavor; see https://github.com/dart-lang/native/issues/1359.
String nativeAssetsDir = "${project.layout.buildDirectory.get()}/../native_assets/android/jniLibs/lib/"
android.sourceSets.main.jniLibs.srcDir(nativeAssetsDir)
configurePlugins(project)
FlutterPluginUtils.detectLowCompileSdkVersionOrNdkVersion(project, getPluginList(project))
return
}
// Flutter host module project (Add-to-app).
String hostAppProjectName = project.rootProject.hasProperty("flutter.hostAppProjectName") ? project.rootProject.property("flutter.hostAppProjectName") : "app"
Project appProject = project.rootProject.findProject(":${hostAppProjectName}")
assert(appProject != null) : "Project :${hostAppProjectName} doesn't exist. To customize the host app project name, set `flutter.hostAppProjectName=<project-name>` in gradle.properties."
// Wait for the host app project configuration.
appProject.afterEvaluate {
assert(appProject.android != null)
project.android.libraryVariants.all { libraryVariant ->
Task copyFlutterAssetsTask
appProject.android.applicationVariants.all { appProjectVariant ->
Task appAssembleTask = appProjectVariant.assembleProvider.get()
if (!FlutterPluginUtils.shouldConfigureFlutterTask(project, appAssembleTask)) {
return
}
// Find a compatible application variant in the host app.
//
// For example, consider a host app that defines the following variants:
// | ----------------- | ----------------------------- |
// | Build Variant | Flutter Equivalent Variant |
// | ----------------- | ----------------------------- |
// | freeRelease | release |
// | freeDebug | debug |
// | freeDevelop | debug |
// | profile | profile |
// | ----------------- | ----------------------------- |
//
// This mapping is based on the following rules:
// 1. If the host app build variant name is `profile` then the equivalent
// Flutter variant is `profile`.
// 2. If the host app build variant is debuggable
// (e.g. `buildType.debuggable = true`), then the equivalent Flutter
// variant is `debug`.
// 3. Otherwise, the equivalent Flutter variant is `release`.
String variantBuildMode = FlutterPluginUtils.buildModeFor(libraryVariant.buildType)
if (FlutterPluginUtils.buildModeFor(appProjectVariant.buildType) != variantBuildMode) {
return
}
copyFlutterAssetsTask = copyFlutterAssetsTask ?: addFlutterDeps(libraryVariant)
Task mergeAssets = project
.tasks
.findByPath(":${hostAppProjectName}:merge${appProjectVariant.name.capitalize()}Assets")
assert(mergeAssets)
mergeAssets.dependsOn(copyFlutterAssetsTask)
}
}
}
configurePlugins(project)
FlutterPluginUtils.detectLowCompileSdkVersionOrNdkVersion(project, getPluginList(project))
}
}