index.js

#!/usr/bin/env node

const fs = require('fs');
const path = require('path');
const clear = require('clear');
const chalk = require('chalk');
const figlet = require('figlet');
const program = require('commander');
const { prompt } = require('inquirer');
const shell = require('shelljs');
const Spinner = require('cli-spinner').Spinner;

const questions = require('./questions');

clear();

console.log(
  chalk.green(
    figlet.textSync('EXY  CLI', { horizontalLayout: 'full' })
  )
);

program
  .version('0.0.1')
  .description('EXY CLI');

program
  .command('init')
  .action(prompt(questions).then(answers => {
    const { template, ...config } = answers;
    const templatePath = `src/${template}`;
    const packagePath = path.resolve(__dirname, templatePath, 'package.json');


    fs.readFile(packagePath, 'utf8', (err, data) => {
      const baseConfig = JSON.parse(data);
      const packageJSONBaseConfig = { ...baseConfig, ...config };

      copyFolderRecursiveSync(path.resolve(__dirname, templatePath), process.cwd());

      const spinner = new Spinner('Installing dependencies.. %s');
      spinner.setSpinnerString('|/-\\');
      spinner.start();

      fs.writeFile(`${template}/package.json`, JSON.stringify(packageJSONBaseConfig, null, 2), (err) => {
        if (err) {
          console.log(err);
        }


        shell.cd(template);
        const install = shell.exec('npm install && npm start', { async: true });

        install.stdout.on('data', () => {
          spinner.stop();
        });

      });
    });


  }));

program.parse(process.argv);


function copyFileSync( source, target ) {

  let targetFile = target;

  //if target is a directory a new file with the same name will be created
  if ( fs.existsSync( target ) ) {
    if ( fs.lstatSync( target ).isDirectory() ) {
      targetFile = path.join( target, path.basename( source ) );
    }
  }

  fs.writeFileSync(targetFile, fs.readFileSync(source));
}

function copyFolderRecursiveSync( source, target ) {
  let files = [];

  //check if folder needs to be created or integrated
  const targetFolder = path.join( target, path.basename( source ) );
  if ( !fs.existsSync( targetFolder ) ) {
    fs.mkdirSync( targetFolder );
  }

  if ( fs.lstatSync( source ).isDirectory() ) {
    files = fs.readdirSync( source );
    files.forEach( function ( file ) {
      const curSource = path.join( source, file );
      if ( fs.lstatSync( curSource ).isDirectory() ) {
        copyFolderRecursiveSync( curSource, targetFolder );
      } else {
        copyFileSync( curSource, targetFolder );
      }
    } );
  }
}