get-npm-package-version/index.js

get npm package version

'use strict';

const getNpmPkgVersion = function (packageName, { registry = '', timeout = null } = {}) {
  try {
    if (/[`$&{}[;|<>#\n \t()]/g.test(packageName) || /[`$&{}[;|<>#\n \t()]/g.test(registry)) {
      return null;
    }
    let version;

    const config = {
      stdio: ['pipe', 'pipe', 'ignore']
    };

    if (timeout) {
      config.timeout = timeout;
    }

    if (registry) {
      version = require('child_process').execSync(`npm view ${packageName} version --registry ${registry}`, config);
    } else {
      version = require('child_process').execSync(`npm view ${packageName} version`, config);
    }

    if (version) {
      return version.toString().trim().replace(/^\n*|\n*$/g, '');
    }
    return null;
  } catch (err) {
    return null;
  }
};

getNpmPkgVersion.getNpmPkgVersion = getNpmPkgVersion; // Named export

module.exports = getNpmPkgVersion;