create-kvell-app/src/helpers/validationHelpers.js

Command line tool to setup Node.js applications

import validateNpmPackageName from "validate-npm-package-name";
import chalk from "chalk";
import { existsSync } from "fs";

const log = console.log;

export const validatePackageName = packageName => {
  if (packageName) {
    const validationResult = validateNpmPackageName(packageName);
    if (validationResult.validForNewPackages && validationResult.validForOldPackages) {
      return true;
    } else {
      const errors = [...(validationResult.warnings || []), ...(validationResult.errors || [])];
      log();
      log(`Could not create project with the name ${chalk.bold.red(`'${packageName}'.`)}`);
      log(
        `The name '${chalk.bold.red(
          `'${packageName}'`
        )}' violates the following npm naming restrictions:`
      );
      log();
      errors.forEach(error => {
        log(chalk.bold.red(`* ${error}`));
      });
      log();
      return false;
    }
  } else {
    // No project directory specified
    log();
    log("Please specifiy a name for your project directory:");
    log(`  ${chalk.blue("create-node-app")} ${chalk.green("<project-directory>")}`);
    log();
    log("For example:");
    log(`  ${chalk.blue("create-node-app")} ${chalk.green("my-node-app")}`);
    // log();
    // log("This directory name will also be your projects's name.");
    return false;
  }
};

export const validateOptions = parsedArgs => {
  // let databaseName = parsedArgs["--database"] || "mongodb";
  const packageName = parsedArgs._[0];
  // enableAutoWatchers = parsedArgs["--auto-template-watcher"];

  // if (databaseName !== "mongodb" && databaseName !== "postgres") {
  //   log();
  //   log(`The boilerplate supports the following databases only:`);
  //   log(chalk.redBright("*mongodb"));
  //   log(chalk.redBright("*postgres"));
  //   log();
  //   return {
  //     valid: false
  //   };
  // } else {
  if (!packageName) {
    return {
      valid: false
    };
  }
  return {
    valid: true,
    argsData: {
      packageName
      // databaseName,
      // enableAutoWatchers
    }
  };
  // }
};

export const doesDirectoryAlreadyExists = directoryName => {
  const directoryParentPath = process.cwd();
  const directoryPath = `${directoryParentPath}/${directoryName}`;
  if (existsSync(directoryPath)) {
    log(`Could not create project with the name ${chalk.bold.yellow(`'${directoryName}'.`)}`);
    log();
    log(
      `Directory ${chalk.bold.yellow(`'${directoryName}'`)} already exists in ${chalk.bold.magenta(
        `'${directoryParentPath}'`
      )}.`
    );
    log();
    return false;
  } else {
    return true;
  }
};