Extract plugins versions from root build.gradle.kts

as it was before

experimental/examples/falling-balls-mpp/build.gradle.kts

@@ -1,22 +1,18 @@
-buildscript {
-    repositories {
-        gradlePluginPortal()
-        google()
-        mavenCentral()
-        mavenLocal()
-    }
-    dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
-        classpath("com.android.tools.build:gradle:7.3.1")
-        classpath("org.jetbrains.compose:compose-gradle-plugin:1.2.1")
-    }
+plugins {
+    // this is necessary to avoid the plugins to be loaded multiple times
+    // in each subproject's classloader
+    kotlin("jvm") apply false
+    kotlin("multiplatform") apply false
+    kotlin("android") apply false
+    id("com.android.application") apply false
+    id("com.android.library") apply false
+    id("org.jetbrains.compose") apply false
 }
 
-allprojects {
+subprojects {
     repositories {
         google()
         mavenCentral()
-        mavenLocal()
         maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
     }
 }

experimental/examples/falling-balls-mpp/gradle.properties

@@ -12,3 +12,6 @@ kotlin.native.enableDependencyPropagation=false
 kotlin.mpp.enableGranularSourceSetsMetadata=true
 # Enable kotlin/native experimental memory model
 kotlin.native.binary.memoryModel=experimental
+kotlin.version=1.7.20
+agp.version=7.1.3
+compose.version=1.2.1

experimental/examples/falling-balls-mpp/settings.gradle.kts

@@ -1,12 +1,25 @@
 pluginManagement {
     repositories {
-        google()
-        jcenter()
         gradlePluginPortal()
-        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+        google()
     }
 
+    plugins {
+        val kotlinVersion = extra["kotlin.version"] as String
+        val agpVersion = extra["agp.version"] as String
+        val composeVersion = extra["compose.version"] as String
+
+        kotlin("jvm").version(kotlinVersion)
+        kotlin("multiplatform").version(kotlinVersion)
+        kotlin("android").version(kotlinVersion)
+        id("com.android.base").version(agpVersion)
+        id("com.android.application").version(agpVersion)
+        id("com.android.library").version(agpVersion)
+        id("org.jetbrains.compose").version(composeVersion)
+    }
 }
+
 rootProject.name = "falling-balls-mpp"
 
 include(":androidApp")

experimental/examples/widgets-gallery/build.gradle.kts

@@ -1,22 +1,18 @@
-buildscript {
-    repositories {
-        gradlePluginPortal()
-        google()
-        mavenCentral()
-        mavenLocal()
-    }
-    dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
-        classpath("com.android.tools.build:gradle:7.3.1")
-        classpath("org.jetbrains.compose:compose-gradle-plugin:1.2.1")
-    }
+plugins {
+    // this is necessary to avoid the plugins to be loaded multiple times
+    // in each subproject's classloader
+    kotlin("jvm") apply false
+    kotlin("multiplatform") apply false
+    kotlin("android") apply false
+    id("com.android.application") apply false
+    id("com.android.library") apply false
+    id("org.jetbrains.compose") apply false
 }
 
-allprojects {
+subprojects {
     repositories {
         google()
         mavenCentral()
-        mavenLocal()
         maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
     }
 }

experimental/examples/widgets-gallery/gradle.properties

@@ -12,3 +12,6 @@ kotlin.native.enableDependencyPropagation=false
 kotlin.mpp.enableGranularSourceSetsMetadata=true
 # Enable kotlin/native experimental memory model
 kotlin.native.binary.memoryModel=experimental
+kotlin.version=1.7.20
+agp.version=7.1.3
+compose.version=1.2.1

experimental/examples/widgets-gallery/settings.gradle.kts

@@ -1,12 +1,25 @@
 pluginManagement {
     repositories {
-        google()
-        jcenter()
         gradlePluginPortal()
-        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+        google()
     }
 
+    plugins {
+        val kotlinVersion = extra["kotlin.version"] as String
+        val agpVersion = extra["agp.version"] as String
+        val composeVersion = extra["compose.version"] as String
+
+        kotlin("jvm").version(kotlinVersion)
+        kotlin("multiplatform").version(kotlinVersion)
+        kotlin("android").version(kotlinVersion)
+        id("com.android.base").version(agpVersion)
+        id("com.android.application").version(agpVersion)
+        id("com.android.library").version(agpVersion)
+        id("org.jetbrains.compose").version(composeVersion)
+    }
 }
+
 rootProject.name = "widgets-gallery"
 
 include(":androidApp")