Unblock build-from-source on nightlies (#39634)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/39634

Running build from source as suggested here:
https://reactnative.dev/contributing/how-to-build-from-source
is currently broken for nightly versions (and for 0.73).

This fixes it by:
- Fixing the import of the Gradle Version Catalog
- Actually adding the Gradle version catalog to the NPM package
- Fixing how the build Codegen CLI task is invoked for build-from-source
- Updating the search directories for codegenDir/reactNativeDir from build-from-source

Changelog:
[Internal] [Fixed] - Unblock build-from-source on nightlies

Reviewed By: cipolleschi

Differential Revision: D49562595

fbshipit-source-id: 9594b7d947569d41c461a7e8287d3ae68fb87b98

packages/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/internal/PrivateReactExtension.kt

@@ -30,7 +30,7 @@ abstract class PrivateReactExtension @Inject constructor(project: Project) {
           .directoryProperty()
           .convention(
               // This is the default for the project root if the users hasn't specified anything.
-              // If the project is called "react-native-github"
+              // If the project is called "react-native-github" or "react-native-build-from-source"
               //   - We're inside the Github Repo -> root is defined by RN Tester (so no default
               // needed)
               //   - We're inside an includedBuild as we're performing a build from source
@@ -39,7 +39,8 @@ abstract class PrivateReactExtension @Inject constructor(project: Project) {
               //   - We're inside a user project, so inside the ./android folder. Default should be
               // ../
               // User can always override this default by setting a `root =` inside the template.
-              if (project.rootProject.name == "react-native-github") {
+              if (project.rootProject.name == "react-native-github" ||
+                  project.rootProject.name == "react-native-build-from-source") {
                 project.rootProject.layout.projectDirectory.dir("../../")
               } else {
                 project.rootProject.layout.projectDirectory.dir("../")

packages/react-native/ReactAndroid/build.gradle

@@ -392,6 +392,10 @@ task prepareKotlinBuildScriptModel {
 final def buildCodegenCLITask = tasks.register('buildCodegenCLI', BuildCodegenCLITask) {
     it.codegenDir.set(file("$rootDir/node_modules/@react-native/codegen"))
     it.bashWindowsHome.set(project.findProperty("react.internal.windowsBashPath"))
+    it.onlyIf {
+        // For build from source scenario, we don't need to build the codegen at all.
+        rootProject.name != "react-native-build-from-source"
+    }
 }
 
 /**
@@ -790,6 +794,16 @@ react {
     jsRootDir = file("../Libraries")
 }
 
+// For build from source, we need to override the privateReact extension.
+// This is neeeded as the build-from-source won't have a com.android.application
+// module to apply the plugin to, so it's codegenDir and reactNativeDir won't be evaluated.
+if (rootProject.name == "react-native-build-from-source") {
+    privateReact {
+        codegenDir = file("$rootDir/../@react-native/codegen")
+        reactNativeDir = file("$rootDir")
+    }
+}
+
 kotlin {
     jvmToolchain(17)
 }

packages/react-native/package.json

@@ -35,6 +35,7 @@
     "cli.js",
     "flow",
     "gradle.properties",
+    "gradle/libs.versions.toml",
     "index.js",
     "interface.js",
     "jest-preset.js",

packages/react-native/settings.gradle.kts

@@ -19,11 +19,7 @@ pluginManagement {
   }
 }
 
-dependencyResolutionManagement {
-  versionCatalogs { create("libs") { from(files("gradle/libs.versions.toml")) } }
-}
-
-rootProject.name = "react-native-github"
+rootProject.name = "react-native-build-from-source"
 
 include(":packages:react-native:ReactAndroid")