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// This script is used to initialize the build in a module or plugin project.
// During this phase, the script applies the Maven plugin and configures the
// destination of the local repository.
// The local repository will contain the AAR and POM files.
import java.nio.file.Paths
import org.gradle.api.Project
import org.gradle.api.artifacts.Configuration
import org.gradle.api.artifacts.maven.MavenDeployer
import org.gradle.api.plugins.MavenPlugin
import org.gradle.api.tasks.Upload
void configureProject(Project project, String outputDir) {
if (!project.hasProperty("android")) {
throw new GradleException("Android property not found.")
}
if (!project.android.hasProperty("libraryVariants")) {
throw new GradleException("Can't generate AAR on a non Android library project.");
}
project.apply plugin: "maven"
// Snapshot versions include the timestamp in the artifact name.
// Therefore, remove the snapshot part, so new runs of `flutter build aar` overrides existing artifacts.
// This version isn't relevant in Flutter since the pub version is used
// to resolve dependencies.
project.version = project.version.replace("-SNAPSHOT", "")
if (project.hasProperty("buildNumber")) {
project.version = project.property("buildNumber")
}
project.android.libraryVariants.all { variant ->
addAarTask(project, variant)
}
project.uploadArchives {
repositories {
mavenDeployer {
repository(url: "file://${outputDir}/outputs/repo")
}
}
}
if (!project.property("is-plugin").toBoolean()) {
return
}
if (project.hasProperty('localEngineOut')) {
// TODO(egarciad): Support local engine.
// This most likely requires refactoring `flutter.gradle`, so the logic can be reused.
throw new GradleException(
"Local engine isn't supported when building the plugins as AAR. " +
"See: https://github.com/flutter/flutter/issues/40866")
}
String storageUrl = System.getenv('FLUTTER_STORAGE_BASE_URL') ?: "https://storage.googleapis.com"
// This is a Flutter plugin project. Plugin projects don't apply the Flutter Gradle plugin,
// as a result, add the dependency on the embedding.
project.repositories {
maven {
url "$storageUrl/download.flutter.io"
}
}
String engineVersion = Paths.get(getFlutterRoot(project), "bin", "internal", "engine.version")
.toFile().text.trim()
project.dependencies {
// Add the embedding dependency.
compileOnly ("io.flutter:flutter_embedding_release:1.0.0-$engineVersion") {
// We only need to expose io.flutter.plugin.*
// No need for the embedding transitive dependencies.
transitive = false
}
}
}
void configurePlugin(Project project, String outputDir) {
if (!project.hasProperty("android")) {
// A plugin doesn't support the Android platform when this property isn't defined in the plugin.
return
}
configureProject(project, outputDir)
}
String getFlutterRoot(Project project) {
if (!project.hasProperty("flutter-root")) {
throw new GradleException("The `-Pflutter-root` flag must be specified.")
}
return project.property("flutter-root")
}
void addAarTask(Project project, variant) {
String variantName = variant.name.capitalize()
String taskName = "assembleAar$variantName"
project.tasks.create(name: taskName) {
// This check is required to be able to configure the archives before `uploadArchives` runs.
if (!project.gradle.startParameter.taskNames.contains(taskName)) {
return
}
project.uploadArchives.repositories.mavenDeployer {
pom {
artifactId = "${project.name}_${variant.name.toLowerCase()}"
}
}
overrideDefaultPublishConfig(project, variant)
// Generate the Maven artifacts.
finalizedBy "uploadArchives"
}
}
// This method mimics the logic in AGP when `android.defaultPublishConfig` is set in `build.gradle`:
// https://android.googlesource.com/platform/tools/base/+/studio-master-dev/build-system/gradle-core/src/main/java/com/android/build/gradle/internal/variant/VariantHelper.java
//
// Unfortunately, `android.defaultPublishConfig` cannot be overridden at this point since
// AGP already run this code.
void overrideDefaultPublishConfig(Project project, variant) {
String variantName = variant.name.capitalize()
Task bundle = project.tasks.findByName("bundle${variantName}Aar") // gradle:3.2.0
if (bundle == null) {
bundle = project.tasks.findByName("bundle${variantName}") // gradle:3.1.0
}
if (bundle == null) {
throw new GradleException("Can't generate AAR for variant ${variantName}.");
}
// Clear the current archive artifacts since the artifacts are based on `android.defaultPublishConfig`.
project.configurations["archives"].artifacts.clear()
// Add the artifact that will be published.
project.artifacts.add("archives", bundle)
def scopeMappings = project.uploadArchives.repositories.mavenDeployer.pom.scopeMappings
// Clear the scope mappings added by AGP since they are based on the current `android.defaultPublishConfig`.
scopeMappings.mappings.clear()
// Add the new mappings.
for (Configuration configuration : flattenConfiguration(variant.runtimeConfiguration)) {
scopeMappings.addMapping(/* priority = */ 300, configuration, "compile")
}
}
Set<Configuration> flattenConfiguration(Configuration configuration) {
Set<Configuration> configs = [configuration]
for (Configuration extend : configuration.extendsFrom) {
configs.addAll(flattenConfiguration(extend))
}
return configs
}
projectsEvaluated {
assert rootProject.hasProperty("is-plugin")
if (rootProject.property("is-plugin").toBoolean()) {
assert rootProject.hasProperty("output-dir")
// In plugin projects, the root project is the plugin.
configureProject(rootProject, rootProject.property("output-dir"))
return
}
// The module project is the `:flutter` subproject.
Project moduleProject = rootProject.subprojects.find { it.name == "flutter" }
assert moduleProject != null
assert moduleProject.hasProperty("output-dir")
configureProject(moduleProject, moduleProject.property("output-dir"))
// Gets the plugin subprojects.
Set<Project> modulePlugins = rootProject.subprojects.findAll {
it.name != "flutter" && it.name != "app"
}
// When a module is built as a Maven artifacts, plugins must also be built this way
// because the module POM's file will include a dependency on the plugin Maven artifact.
// This is due to the Android Gradle Plugin expecting all library subprojects to be published
// as Maven artifacts.
modulePlugins.each { pluginProject ->
configurePlugin(pluginProject, moduleProject.property("output-dir"))
moduleProject.android.libraryVariants.all { variant ->
// Configure the `assembleAar<variantName>` task for each plugin's projects and make
// the module's equivalent task depend on the plugin's task.
String variantName = variant.name.capitalize()
moduleProject.tasks.findByPath("assembleAar$variantName")
.dependsOn(pluginProject.tasks.findByPath("assembleAar$variantName"))
}
}
}