feat: backport android of new arch project

Author: Sunbreak

packages/create-react-native-library/templates/native-common/android/build.gradle

@@ -27,6 +27,31 @@ apply plugin: "com.android.library"
 apply plugin: "kotlin-android"
 <% } -%>
 
+<% if (project.view && (project.arch === "new" || project.arch === "mixed")) { -%>
+import groovy.json.JsonSlurper
+
+// https://github.com/callstack/react-native-builder-bob/discussions/359
+def registrationCompat = {
+  def reactNativeManifest = file("$projectDir/../node_modules/react-native/package.json").exists()
+    ? file("$projectDir/../node_modules/react-native/package.json") // developer mode, to run example app
+    : file("$projectDir/../../react-native/package.json")
+  def reactNativeVersion = new JsonSlurper().parseText(reactNativeManifest.text).version as String
+  // Fabric was introduced at [email protected], full CMake support were introduced at [email protected]
+  // Use Android.mk for compatibility with [email protected]/0.69
+  reactNativeVersion.matches('(0.68.*|0.69.*)')
+}()
+
+def codegenViewLibraryName = "<%- project.name + 'View' -%>"
+def codegenViewModuleName = {
+  // Autolink for Fabric uses codegenConfig.name in package.json since [email protected]
+  // Use codegenViewLibraryName for compatibility with [email protected]/0.69
+  def libraryManifestJson = new JsonSlurper().parseText(file("$projectDir/../package.json").text)
+  registrationCompat ? codegenViewLibraryName : libraryManifestJson.codegenConfig.name
+}()
+<% } -%>
+
+def appProject = rootProject.allprojects.find { it.plugins.hasPlugin('com.android.application') }
+
 if (isNewArchitectureEnabled()) {
   apply plugin: "com.facebook.react"
 }
@@ -40,7 +65,7 @@ def getExtOrIntegerDefault(name) {
 }
 
 android {
-<% if (project.cpp) { -%>
+<% if (project.cpp || (project.view && (project.arch === "new" || project.arch === "mixed"))) { -%>
   ndkVersion getExtOrDefault("ndkVersion")
 <% } -%>
   compileSdkVersion getExtOrIntegerDefault("compileSdkVersion")
@@ -49,13 +74,35 @@ android {
     minSdkVersion getExtOrIntegerDefault("minSdkVersion")
     targetSdkVersion getExtOrIntegerDefault("targetSdkVersion")
     buildConfigField "boolean", "IS_NEW_ARCHITECTURE_ENABLED", isNewArchitectureEnabled().toString()
+<% if (project.view && (project.arch === "new" || project.arch === "mixed")) { -%>
+    buildConfigField "String", "CODEGEN_MODULE_REGISTRATION", (isNewArchitectureEnabled() && registrationCompat ? "\"${codegenViewModuleName}_registration\"" : "null")
+<% } -%>
 <% if (project.cpp) { -%>
     externalNativeBuild {
       cmake {
         cppFlags "-O2 -frtti -fexceptions -Wall -fstack-protector-all"
         abiFilters "x86", "x86_64", "armeabi-v7a", "arm64-v8a"
       }
     }
+<% } else if (project.view && (project.arch === "new" || project.arch === "mixed")) { -%>
+    if (isNewArchitectureEnabled() && registrationCompat) {
+      def reactAndroidProject = project(':ReactAndroid')
+      externalNativeBuild {
+        ndkBuild {
+          arguments "APP_PLATFORM=android-21",
+                    "APP_STL=c++_shared",
+                    "NDK_TOOLCHAIN_VERSION=clang",
+                    "GENERATED_SRC_DIR=$buildDir/generated/source", // for react_codegen_* in this library's codegen/jni
+                    "PROJECT_BUILD_DIR=${appProject.buildDir}", // for REACT_NDK_EXPORT_DIR in ReactAndroid's Android-prebuilt.mk
+                    "REACT_ANDROID_DIR=${reactAndroidProject.projectDir}",
+                    "REACT_ANDROID_BUILD_DIR=${reactAndroidProject.buildDir}",
+                    "CODEGEN_MODULE_NAME=$codegenViewModuleName"
+          cFlags "-Wall", "-Werror", "-fexceptions", "-frtti", "-DWITH_INSPECTOR=1"
+          cppFlags "-std=c++17"
+          targets "${codegenViewModuleName}_registration"
+        }
+      }
+    }
 <% } -%>
   }
 <% if (project.cpp) { -%>
@@ -64,6 +111,15 @@ android {
       path "CMakeLists.txt"
     }
   }
+<% } else if (project.view && (project.arch === "new" || project.arch === "mixed")) { -%>
+  if (isNewArchitectureEnabled() && registrationCompat) {
+    // We configure the NDK build only if you decide to opt-in for the New Architecture.
+    externalNativeBuild {
+      ndkBuild {
+        path "Android.mk"
+      }
+    }
+  }
 <% } -%>
   buildTypes {
     release {
@@ -130,7 +186,11 @@ dependencies {
 if (isNewArchitectureEnabled()) {
   react {
     jsRootDir = file("../src/")
+<% if (project.view && (project.arch === "new" || project.arch === "mixed")) { %>
+    libraryName = codegenViewLibraryName
+<% } else { -%>
     libraryName = "<%- project.view ? project.name + 'View' : project.name -%>"
+<% } -%>
     codegenJavaPackageName = "com.<%- project.package -%>"
   }
 }