RNGP - Honor the --active-arch-only when configuring the NDK

packages/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/utils/NdkConfiguratorUtils.kt

@@ -10,6 +10,7 @@ package com.facebook.react.utils
 import com.android.build.api.variant.AndroidComponentsExtension
 import com.android.build.api.variant.Variant
 import com.facebook.react.ReactExtension
+import com.facebook.react.utils.ProjectUtils.getReactNativeArchitectures
 import com.facebook.react.utils.ProjectUtils.isNewArchEnabled
 import java.io.File
 import org.gradle.api.Project
@@ -49,6 +50,13 @@ internal object NdkConfiguratorUtils {
         if ("-DANDROID_STL" !in cmakeArgs) {
           cmakeArgs.add("-DANDROID_STL=c++_shared")
         }
+
+        val architectures = project.getReactNativeArchitectures()
+        // abiFilters are split ABI are not compatible each other, so we set the abiFilters
+        // only if the user hasn't enabled the split abi feature.
+        if (architectures.isNotEmpty() && !ext.splits.abi.isEnable) {
+          ext.defaultConfig.ndk.abiFilters.addAll(architectures)
+        }
       }
     }
   }

packages/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/utils/ProjectUtils.kt

@@ -43,4 +43,13 @@ internal object ProjectUtils {
   internal fun Project.needsCodegenFromPackageJson(model: ModelPackageJson?): Boolean {
     return model?.codegenConfig != null
   }
+
+  internal fun Project.getReactNativeArchitectures(): List<String> {
+    val architectures = mutableListOf<String>()
+    if (project.hasProperty("reactNativeArchitectures")) {
+      val architecturesString = project.property("reactNativeArchitectures").toString()
+      architectures.addAll(architecturesString.split(",").filter { it.isNotBlank() })
+    }
+    return architectures
+  }
 }

packages/react-native-gradle-plugin/src/test/kotlin/com/facebook/react/utils/ProjectUtilsTest.kt

@@ -11,12 +11,12 @@ import com.facebook.react.TestReactExtension
 import com.facebook.react.model.ModelCodegenConfig
 import com.facebook.react.model.ModelPackageJson
 import com.facebook.react.tests.createProject
+import com.facebook.react.utils.ProjectUtils.getReactNativeArchitectures
 import com.facebook.react.utils.ProjectUtils.isHermesEnabled
 import com.facebook.react.utils.ProjectUtils.isNewArchEnabled
 import com.facebook.react.utils.ProjectUtils.needsCodegenFromPackageJson
 import java.io.File
-import org.junit.Assert.assertFalse
-import org.junit.Assert.assertTrue
+import org.junit.Assert.*
 import org.junit.Rule
 import org.junit.Test
 import org.junit.rules.TemporaryFolder
@@ -169,4 +169,41 @@ class ProjectUtilsTest {
 
     assertFalse(project.needsCodegenFromPackageJson(extension))
   }
+
+  @Test
+  fun getReactNativeArchitectures_withMissingProperty_returnsEmptyList() {
+    val project = createProject()
+    assertTrue(project.getReactNativeArchitectures().isEmpty())
+  }
+
+  @Test
+  fun getReactNativeArchitectures_withEmptyProperty_returnsEmptyList() {
+    val project = createProject()
+    project.extensions.extraProperties.set("reactNativeArchitectures", "")
+    assertTrue(project.getReactNativeArchitectures().isEmpty())
+  }
+
+  @Test
+  fun getReactNativeArchitectures_withSingleArch_returnsSingleton() {
+    val project = createProject()
+    project.extensions.extraProperties.set("reactNativeArchitectures", "x86")
+
+    val archs = project.getReactNativeArchitectures()
+    assertEquals(1, archs.size)
+    assertEquals("x86", archs[0])
+  }
+
+  @Test
+  fun getReactNativeArchitectures_withMultipleArch_returnsList() {
+    val project = createProject()
+    project.extensions.extraProperties.set(
+        "reactNativeArchitectures", "armeabi-v7a,arm64-v8a,x86,x86_64")
+
+    val archs = project.getReactNativeArchitectures()
+    assertEquals(4, archs.size)
+    assertEquals("armeabi-v7a", archs[0])
+    assertEquals("arm64-v8a", archs[1])
+    assertEquals("x86", archs[2])
+    assertEquals("x86_64", archs[3])
+  }
 }