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bye18e

@E18e/Is Npm

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Last update

Aug 9, 2024

Replace is-npm Module Codemod

Introduction

This codemod replaces the is-npm npm module with a more efficient implementation using built-in Node.js environment variables. It eliminates the dependency on the library, reducing bundle size and improving performance by leveraging native features.

Before

import { isNpm, isYarn, isNpmOrYarn } from 'is-npm';


if (isNpm) {
    console.log('Running in npm environment');
}


if (isYarn) {
    console.log('Running in yarn environment');
}


if (isNpmOrYarn) {
    console.log('Running in either npm or yarn environment');
}

After

if (
    (process.env.npm_config_user_agent &&
        process.env.npm_config_user_agent.startsWith('npm')) ||
    (process.env.npm_package_json &&
        process.env.npm_package_json.endsWith('package.json')) ||
    (process.env.npm_config_user_agent &&
        process.env.npm_config_user_agent.startsWith('yarn'))
) {
    console.log('Running in npm or yarn environment');
} else if (process.env.npm_config_user_agent &&
    process.env.npm_config_user_agent.startsWith('npm')) {
    console.log('Running in npm environment');
} else if (process.env.npm_config_user_agent &&
    process.env.npm_config_user_agent.startsWith('yarn')) {
    console.log('Running in yarn environment');
}

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