react-native-builder-bob/lib/src/targets/codegen/patches/patchCodegenAndroidPackage.js

CLI to build JavaScript files for React Native libraries

import path from 'node:path';
import fs from 'fs-extra';
import kleur from 'kleur';
export const CODEGEN_DOCS = 'https://reactnative.dev/docs/the-new-architecture/using-codegen#configuring-codegen';
/**
 * Currently, running react-native codegen generates java files with package name `com.facebook.fbreact.specs`.
 * This is a known issue in react-native itself.
 * You can find the relevant line here: https://github.com/facebook/react-native/blob/dc460147bb00d6f912cc0a829f8040d85faeeb13/packages/react-native/scripts/codegen/generate-artifacts-executor.js#L459.
 * To workaround, this function renames the package name to the one provided in the codegenConfig.
 * @throws if codegenConfig.outputDir.android or codegenConfig.android.javaPackageName is not defined in package.json
 * @throws if the codegenAndroidPath does not exist
 */
export async function patchCodegenAndroidPackage(projectPath, 
// eslint-disable-next-line @typescript-eslint/no-explicit-any
packageJson, report) {
    let codegenAndroidPath = packageJson.codegenConfig?.outputDir?.android;
    if (!codegenAndroidPath) {
        throw new Error(`Your package.json doesn't contain codegenConfig.outputDir.android. Please see ${CODEGEN_DOCS}`);
    }
    codegenAndroidPath = path.resolve(projectPath, codegenAndroidPath);
    if (!(await fs.pathExists(codegenAndroidPath))) {
        throw new Error(`The codegen android path defined in your package.json: ${codegenAndroidPath} doesn't exist.`);
    }
    const codegenJavaPackageName = packageJson.codegenConfig.android.javaPackageName;
    if (!codegenJavaPackageName) {
        throw new Error(`Your package.json doesn't contain codegenConfig.android.javaPackageName. Please see ${CODEGEN_DOCS}`);
    }
    const codegenJavaPath = path.resolve(codegenAndroidPath, `java/com/facebook/fbreact/specs`);
    // If this issue is ever fixed in react-native, this check will prevent the patching from running.
    if (!(await fs.pathExists(codegenJavaPath))) {
        report.info(`Could not find ${kleur.blue(path.relative(projectPath, codegenJavaPath))}. Skipping patching codegen java files.`);
        return;
    }
    const javaFiles = await fs.readdir(codegenJavaPath);
    await Promise.all(javaFiles.map(async (file) => {
        const filePath = path.resolve(codegenJavaPath, file);
        const fileContent = await fs.readFile(filePath, 'utf8');
        const newFileContent = fileContent.replace('package com.facebook.fbreact.specs', `package ${codegenJavaPackageName}`);
        await fs.writeFile(filePath, newFileContent);
    }));
    const newPackagePath = path.resolve(codegenAndroidPath, 'java', codegenJavaPackageName.replace(/\./g, path.sep));
    if (!(await fs.pathExists(newPackagePath))) {
        await fs.mkdir(newPackagePath, { recursive: true });
    }
    await Promise.all(javaFiles.map(async (file) => {
        const filePath = path.resolve(codegenJavaPath, file);
        const newFilePath = path.resolve(newPackagePath, file);
        await fs.rename(filePath, newFilePath);
    }));
    if (await fs.pathExists(path.resolve(codegenAndroidPath, 'java/com/facebook/react/viewmanagers'))) {
        // Keep the view managers
        await fs.rm(path.resolve(codegenAndroidPath, 'java/com/facebook/fbreact'), {
            recursive: true,
        });
    }
    else {
        // Delete the entire facebook namespace
        await fs.rm(path.resolve(codegenAndroidPath, 'java/com/facebook'), {
            recursive: true,
        });
    }
}
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