smallest version of R8

Author: irodotos7

example/android/kotlinlib/1-hello-kotlin/app/proguard-rules.pro

@@ -1,6 +1,7 @@
 # Add project specific ProGuard rules here.
 # You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
+# override def proguardReleaseConfigs: T[Seq[PathRef]] in build.mill
+
 #
 # For more details, see
 #   http://developer.android.com/guide/developing/tools/proguard.html

scalalib/src/mill/javalib/android/AndroidAppModule.scala

@@ -792,7 +792,7 @@ trait AndroidAppModule extends AndroidModule {
 
     val r8ArgsBuilder = Seq.newBuilder[String]
 
-    r8ArgsBuilder += androidSdkModule().r8Path().path.toString
+    r8ArgsBuilder += androidSdkModule().r8Exe().path.toString
 
     if (androidIsDebug())
       r8ArgsBuilder += "--debug"

scalalib/src/mill/javalib/android/AndroidModule.scala

@@ -724,12 +724,10 @@ trait AndroidModule extends JavaModule {
     )
   }
 
-  // Additional library classes (if any) that should be treated as provided
+  /** Additional library classes (if any) that should be treated as provided */
   def libraryClassesPaths: T[Seq[PathRef]] = T {
     Seq(
       androidSdkModule().androidJarPath(),
-      androidSdkModule().r8LibPath(),
-      androidSdkModule().r8LibClasspath(),
       androidSdkModule().androidCoreModulesPath(),
       androidSdkModule().androidOptionalApacheHttpLegacy(),
       androidSdkModule().androidOptionalCar(),
@@ -743,25 +741,31 @@ trait AndroidModule extends JavaModule {
     true
   }
 
-  // Specifies the path to the main-dex rules file, which contains ProGuard rules
-  // for determining which classes should be included in the primary DEX file.
+  /**
+   * Specifies the path to the main-dex rules file, which contains ProGuard rules
+   * for determining which classes should be included in the primary DEX file.
+   */
   def mainDexRules: T[Option[PathRef]] = T {
     Some(PathRef(androidResources()._1.path / "main-dex-rules.pro"))
   }
 
-  // Returns the path to the main-dex list file, which explicitly lists the classes
-  // to be included in the primary DEX file. Currently, this is not defined.
+  /**
+   * Returns the path to the main-dex list file, which explicitly lists the classes
+   * to be included in the primary DEX file. Currently, this is not defined.
+   */
   def mainDexList: T[Option[PathRef]] = T {
     None
   }
 
-  // Provides the output path for the generated main-dex list file, which is used
-  // during the DEX generation process.
+  /**
+   *  Provides the output path for the generated main-dex list file, which is used
+   *  during the DEX generation process.
+   */
   def mainDexListOutput: T[Option[PathRef]] = T {
     Some(androidModuleGeneratedSourcesFunc().mainDexListOutput)
   }
 
-  // Optional baseline profile for ART rewriting
+  /** Optional baseline profile for ART rewriting */
   def baselineProfile: T[Option[PathRef]] = T {
     None
   }

scalalib/src/mill/javalib/android/AndroidSdkModule.scala

@@ -208,18 +208,10 @@ trait AndroidSdkModule extends Module {
    *
    * @return A task containing a [[PathRef]] pointing to the r8 directory.
    */
-  def r8Path: T[PathRef] = Task {
+  def r8Exe: T[PathRef] = Task {
     PathRef(sdkPath().path / "cmdline-tools/latest/bin/r8")
   }
 
-  def r8LibPath: T[PathRef] = Task {
-    PathRef(sdkPath().path / "cmdline-tools/latest/lib/r8.jar")
-  }
-
-  def r8LibClasspath: T[PathRef] = Task {
-    PathRef(sdkPath().path / "cmdline-tools/latest/lib/r8-classpath.jar")
-  }
-
   /**
    * Installs the necessary Android SDK components such as platform-tools, build-tools, and Android platforms.
    *