migrate to declarative plugins {} block

android/app/build.gradle

@@ -1,3 +1,11 @@
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlinx-serialization'
+    id 'dev.flutter.flutter-gradle-plugin'
+    id 'com.google.android.gms.oss-licenses-plugin'
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -6,31 +14,16 @@ if (localPropertiesFile.exists()) {
     }
 }
 
-def flutterRoot = localProperties.getProperty('flutter.sdk')
-if (flutterRoot == null) {
-    throw new FileNotFoundException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
-}
-
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
 if (flutterVersionCode == null) {
-    //noinspection GroovyUnusedAssignment
     flutterVersionCode = '1'
 }
 
 def flutterVersionName = localProperties.getProperty('flutter.versionName')
 if (flutterVersionName == null) {
-    //noinspection GroovyUnusedAssignment
     flutterVersionName = '1.0'
 }
 
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'kotlinx-serialization'
-apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
-apply plugin: 'com.google.android.gms.oss-licenses-plugin'
-
-import com.android.build.OutputFile
-
 android {
 
     namespace 'com.yubico.authenticator'
@@ -58,7 +51,6 @@ android {
         versionName flutterVersionName
     }
 
-
     buildTypes {
         release {
             minifyEnabled true
@@ -78,7 +70,7 @@ android {
     applicationVariants.all { variant ->
         variant.outputs.each { output ->
             def abiCodes = ['armeabi-v7a': 1, 'arm64-v8a': 2, x86: 3, x86_64: 4]
-            def abiCode = abiCodes.get(output.getFilter(OutputFile.ABI))
+            def abiCode = abiCodes.get(output.getFilter(com.android.build.OutputFile.ABI))
             output.versionCodeOverride = variant.versionCode * 10 + (abiCode != null ? abiCode : 0)
         }
     }

android/build.gradle

@@ -1,18 +1,3 @@
-buildscript {
-    ext.kotlin_version = '1.9.22'
-    repositories {
-        google()
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:8.1.4'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
-        classpath 'com.google.android.gms:oss-licenses-plugin:0.10.6'
-    }
-}
-
 allprojects {
     repositories {
         google()

android/settings.gradle

@@ -1,11 +1,35 @@
+pluginManagement {
+    def flutterSdkPath = {
+        def properties = new Properties()
+        file("local.properties").withInputStream { properties.load(it) }
+        def flutterSdkPath = properties.getProperty("flutter.sdk")
+        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+        return flutterSdkPath
+    }()
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+    resolutionStrategy {
+        eachPlugin {
+            // https://github.com/google/play-services-plugins/issues/223
+            if (requested.id.id == "com.google.android.gms.oss-licenses-plugin") {
+                useModule("com.google.android.gms:oss-licenses-plugin:${requested.version}")
+            }
+        }
+    }
+}
+
+plugins {
+    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+    id "com.android.application" version "8.1.4" apply false
+    id "org.jetbrains.kotlin.android" version "1.9.22" apply false
+    id "org.jetbrains.kotlin.plugin.serialization" version "1.9.22" apply false
+    id "com.google.android.gms.oss-licenses-plugin" version "0.10.6" apply false
+}
+
 include ':app'
-
-def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
-def properties = new Properties()
-
-assert localPropertiesFile.exists()
-localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
-
-def flutterSdkPath = properties.getProperty("flutter.sdk")
-assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
-apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"