check-npm-package.js

/**
 * Adapted from https://github.com/tmeasday/check-npm-versions
 */
import fs from 'fs';
import semver from 'semver';
import colors from 'colors';
import logger from './logger';
import ImportPathHelpers from './helpers/import-path-helpers';

export default function checkNpmPackage(packageWithVersion) {
  const [ packageName, packageVersion ] = packageWithVersion.split('@');

  if (!verifyPackageExists(packageName, packageVersion)) {
    return false;
  }

  return checkNpmVersion(packageName, packageVersion);
}

function verifyPackageExists(packageName, packageVersion) {
  const packagePath = `${ImportPathHelpers.basePath}/node_modules/${packageName}`;
  const doesPackageExist = fs.existsSync(packagePath);
  if (!doesPackageExist) {
    logger.error(colors.red.bold(`Error checking npm module: ${packageName}@${packageVersion} (required by nathantreid:css-modules): module not found. Please ensure you have installed the module; here is the command:\n meteor npm install ${packageName} --save-dev\n`));
  }

  return doesPackageExist;
}

function checkNpmVersion(name, version) {
  try {
    const installedVersion = require(`${name}/package.json`).version;
    if (semver.satisfies(installedVersion, version)) {
      return true;
    } else {
      logger.warn(colors.yellow.bold(`WARNING: version mismatch for ${name}; installed version is ${installedVersion}, but version ${version} is required by nathantreid:css-modules)`));
      return true;
    }
  } catch (e) {
    logger.error(colors.red.bold(`Error checking package: ${name}@${version} (required by nathantreid:css-modules): ${e.message}`));
    return false;
  }
}