Remove the enableSeparateBuildPerCPUArchitecture from the template en…

…tirely (facebook#36341)

Summary:
Pull Request resolved: facebook#36341

See react-native-community/discussions-and-proposals#602 for more context.
TL;DR: this flag is used for an edge case. We should not expose it to every users but move it to a guide.

I'll publish a guide on the website on how to achieve the same feature.

Changelog:
[Android] [Changed] - Remove the enableSeparateBuildPerCPUArchitecture from the template entirely

Reviewed By: cipolleschi

Differential Revision: D43695574

fbshipit-source-id: 0a8bc7a169804de41e0b0cf813d184301635b907

packages/rn-tester/android/app/build.gradle

@@ -57,14 +57,6 @@ react {
     enableHermesOnlyInVariants = ["hermesDebug", "hermesRelease"]
 }
 
-/**
- * Set this to true to create four separate APKs instead of one,
- * one for each native architecture. This is useful if you don't
- * use App Bundles (https://developer.android.com/guide/app-bundle/)
- * and want to have separate APKs to upload to the Play Store.
- */
-def enableSeparateBuildPerCPUArchitecture = true
-
 /**
  * Run Proguard to shrink the Java bytecode in release builds.
  */
@@ -146,7 +138,7 @@ android {
     }
     splits {
         abi {
-            enable enableSeparateBuildPerCPUArchitecture
+            enable true
             universalApk false
             reset()
             include (*reactNativeArchitectures())

template/android/app/build.gradle

@@ -1,8 +1,6 @@
 apply plugin: "com.android.application"
 apply plugin: "com.facebook.react"
 
-import com.android.build.OutputFile
-
 /**
  * This is the configuration block to customize your React Native Android app.
  * By default you don't need to apply any configuration, just uncomment the lines you need.
@@ -52,14 +50,6 @@ react {
     // hermesFlags = ["-O", "-output-source-map"]
 }
 
-/**
- * Set this to true to create four separate APKs instead of one,
- * one for each native architecture. This is useful if you don't
- * use App Bundles (https://developer.android.com/guide/app-bundle/)
- * and want to have separate APKs to upload to the Play Store.
- */
-def enableSeparateBuildPerCPUArchitecture = false
-
 /**
  * Set this to true to Run Proguard on Release builds to minify the Java bytecode.
  */
@@ -78,16 +68,6 @@ def enableProguardInReleaseBuilds = false
  */
 def jscFlavor = 'org.webkit:android-jsc:+'
 
-/**
- * Private function to get the list of Native Architectures you want to build.
- * This reads the value from reactNativeArchitectures in your gradle.properties
- * file and works together with the --active-arch-only flag of react-native run-android.
- */
-def reactNativeArchitectures() {
-    def value = project.getProperties().get("reactNativeArchitectures")
-    return value ? value.split(",") : ["armeabi-v7a", "x86", "x86_64", "arm64-v8a"]
-}
-
 android {
     ndkVersion rootProject.ext.ndkVersion
 
@@ -101,15 +81,6 @@ android {
         versionCode 1
         versionName "1.0"
     }
-
-    splits {
-        abi {
-            reset()
-            enable enableSeparateBuildPerCPUArchitecture
-            universalApk false  // If true, also generate a universal APK
-            include (*reactNativeArchitectures())
-        }
-    }
     signingConfigs {
         debug {
             storeFile file('debug.keystore')
@@ -130,22 +101,6 @@ android {
             proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
         }
     }
-
-    // applicationVariants are e.g. debug, release
-    applicationVariants.all { variant ->
-        variant.outputs.each { output ->
-            // For each separate APK per architecture, set a unique version code as described here:
-            // https://developer.android.com/studio/build/configure-apk-splits.html
-            // Example: versionCode 1 will generate 1001 for armeabi-v7a, 1002 for x86, etc.
-            def versionCodes = ["armeabi-v7a": 1, "x86": 2, "arm64-v8a": 3, "x86_64": 4]
-            def abi = output.getFilter(OutputFile.ABI)
-            if (abi != null) {  // null for the universal-debug, universal-release variants
-                output.versionCodeOverride =
-                        defaultConfig.versionCode * 1000 + versionCodes.get(abi)
-            }
-
-        }
-    }
 }
 
 dependencies {