release-profile.ts

#!/usr/bin/env ts-node

/* eslint-disable no-console */
import {execSync} from 'child_process';
import fs from 'fs';
import parseCommandLineArguments from './utils/parseCommandLineArguments';

// Function to find .cpuprofile files in the current directory
function findCpuProfileFiles() {
    const files = fs.readdirSync(process.cwd());
    return files.filter((file) => file.endsWith('.cpuprofile'));
}

const argsMap = parseCommandLineArguments();

// Determine sourcemapPath based on the platform flag passed
let sourcemapPath: string | undefined;
if (argsMap.platform === 'ios') {
    sourcemapPath = 'main.jsbundle.map';
} else if (argsMap.platform === 'android') {
    sourcemapPath = 'android/app/build/generated/sourcemaps/react/productionRelease/index.android.bundle.map';
} else if (argsMap.platform === 'web') {
    sourcemapPath = 'dist/merged-source-map.js.map';
} else {
    console.error('Please specify the platform using --platform=ios or --platform=android');
    process.exit(1);
}

// Attempt to find .cpuprofile files
const cpuProfiles = findCpuProfileFiles();
if (cpuProfiles.length === 0) {
    console.error('No .cpuprofile files found in the root directory.');
    process.exit(1);
} else if (cpuProfiles.length > 1) {
    console.error('Multiple .cpuprofile files found. Please specify which one to use by placing only one .cpuprofile in the root or specifying the filename as an argument.');
    process.exit(1);
} else {
    // Construct the command
    const cpuprofileName = cpuProfiles[0];
    const command = `npx react-native-release-profiler --local "${cpuprofileName}" --sourcemap-path "${sourcemapPath}"`;

    console.log(`Executing: ${command}`);

    // Execute the command
    try {
        const output = execSync(command, {stdio: 'inherit'});
        console.log(output.toString());
    } catch (error) {
        if (error instanceof Error) {
            console.error(`Error executing command: ${error.toString()}`);
        }

        process.exit(1);
    }
}