[ios][prebuild] build swift package from prebuild script

This commit adds building the swift package from the prebuild script:

- Added swiftpackage.js for building the swift package
- Added calling building from the main script
- Added configurable build type from the main script.
- Removed params in jsdoc from the link method

packages/react-native/scripts/ios-prebuild.js

@@ -12,6 +12,7 @@ const {prepareHermesArtifactsAsync} = require('./ios-prebuild/hermes');
 const {
   prepareReactNativeDependenciesArtifactsAsync,
 } = require('./ios-prebuild/reactNativeDependencies');
+const {buildSwiftPackage} = require('./ios-prebuild/swiftpackage');
 const {
   createFolderIfNotExists,
   createLogger,
@@ -53,10 +54,6 @@ async function main() {
      * Creates a hard link from one path to another. For each subfolder
      * in the source path, it creates a link in the target path with an
      * underscore prefix.
-     * @param {string} fromPath - The path to the source file or directory
-     * @param {string} includePath - Path in the headers folder to create the link
-     * @throws {Error} If the source path does not exist or if the link creation fails
-     * @returns {void}
      */
     const link = (fromPath /*:string*/, includePath /*:string*/) => {
       const source = path.resolve(root, fromPath);
@@ -113,10 +110,21 @@ async function main() {
       });
     };
 
-    // HERMES ARTIFACTS
-    await prepareHermesArtifactsAsync(currentVersion, 'debug');
+    // BUILD TYPE
+    const buildType = process.env.BUILD_TYPE ?? 'debug';
+    if (buildType !== 'debug' && buildType !== 'release') {
+      throw new Error(
+        `Invalid build type: ${buildType}. Must be either "debug" or "release".`,
+      );
+    }
 
-    await prepareReactNativeDependenciesArtifactsAsync(currentVersion, 'debug');
+    // HERMES ARTIFACTS
+    await prepareHermesArtifactsAsync(currentVersion, buildType);
+
+    await prepareReactNativeDependenciesArtifactsAsync(
+      currentVersion,
+      buildType,
+    );
 
     // CODEGEN
     const codegenPath = path.join(root, '.build/codegen');
@@ -168,6 +176,10 @@ async function main() {
       'react/renderer/imagemanager',
     );
 
+    // BUILD SWIFT PACKAGE
+    const frameworkPaths = buildSwiftPackage(root, buildFolder, buildType);
+
+
     // Done!
     prebuildLog('🏁 Done!');
   } catch (err) {

packages/react-native/scripts/ios-prebuild/swiftpackage.js

@@ -0,0 +1,77 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+const {createLogger} = require('./utils');
+const {execSync} = require('child_process');
+const fs = require('fs');
+const glob = require('glob');
+const path = require('path');
+
+const buildLog = createLogger('SPM');
+
+function buildSwiftPackage(
+  rootFolder /*: string */,
+  buildFolder /*: string */,
+  buildType /*: 'debug' | 'release' */,
+) /*: Array<string> */ {
+  const outputFolder = path.join(buildFolder, 'output', 'spm', buildType);
+  const buildPlatform = (platform /*:string*/) => {
+    const buildCommand =
+      `xcodebuild -scheme React -destination "generic/platform=${platform}" -derivedDataPath "${outputFolder}" ` +
+      `-configuration "${buildType}" SKIP_INSTALL=NO BUILD_LIBRARY_FOR_DISTRIBUTION=YES OTHER_SWIFT_FLAGS="-no-verify-emitted-module-interface"`;
+    buildLog('Building Swift package for ' + 'debug');
+    buildLog(buildCommand);
+
+    execSync(buildCommand, {
+      cwd: rootFolder,
+      stdio: 'inherit',
+    });
+  };
+
+  // TODO: Extend with platforms/targets
+  buildPlatform('iOS simulator');
+  buildPlatform('iOS');
+
+  // Use glob to find all the frameworks in the output folder
+  const productsFolder = path.join(outputFolder, 'Build/Products');
+  if (!fs.existsSync(productsFolder)) {
+    throw new Error(
+      `Output folder does not exist: ${productsFolder}. Did the build fail?`,
+    );
+  }
+
+  // The frameworks are in the products folder under a platform/buildType folder and are directories ending with .framework
+  const frameworks = glob.sync('**/*.framework', {
+    cwd: productsFolder,
+    absolute: true,
+  });
+
+  if (frameworks.length === 0) {
+    throw new Error(
+      `No frameworks found in the output folder: ${productsFolder}`,
+    );
+  }
+
+  const frameworkPaths = frameworks.filter(p => p.endsWith('React.framework'));
+  if (frameworkPaths.length === 0) {
+    throw new Error(
+      `No React.framework found in the output folder: ${productsFolder}`,
+    );
+  }
+  buildLog('React.frameworks:');
+  frameworkPaths.forEach(p => {
+    buildLog('  ' + p);
+  });
+  return frameworkPaths;
+}
+
+module.exports = {
+  buildSwiftPackage,
+};