Search and Destroy - Free up disk space deleting "node_modules" folders recursively

sad.js

#!/usr/bin/env node
// Search and Destroy
//
const path = require('path')
const fs = require('fs')

const createPackageJson = () => {
  const packageJsonContent = `
  {
    "name": "sad",
    "main": "sad.js",
    "dependencies": {
      "commander": "^2.20.0",
      "chalk-pipe": "^2.0.0",
      "fs-extra": "^7.0.1"
    }
  }
  `
  fs.writeFileSync(`${__dirname}/package.json`, packageJsonContent)
}

try {
  const program = require.resolve('commander')
  const chalkPipe = require.resolve('chalk-pipe')
  const fsExtra = require.resolve('fs-extra')
} catch (error) {
  console.error('Please install missing libraries! (Run: yarn)')
  createPackageJson()
  process.exit(1)
}

const program = require('commander')
const chalkPipe = require('chalk-pipe')
const fsExtra = require('fs-extra')

const chalk = (format) => (text) => {
  return console.log(chalkPipe(format)(`${text}`))
}
const okMsg = chalk('bgGreen.black')
const errorMsg = chalk('bgRed.#cccccc')
const warningMsg = chalk('orange.bold')
const textMsg = chalk('bgBlue.bold.white')

function* walkSync(dir) {
  const files = fs.readdirSync(dir)

  for (const file of files) {
    const pathToFile = path.join(dir, file)
    const isDirectory = fs.lstatSync(pathToFile).isDirectory()
    if (isDirectory) {
      if (file === 'node_modules') {
        yield pathToFile
      } else {
        yield* walkSync(pathToFile)
      }
    }
  }
}

let workingDir
program
  .version('0.0.1')
  .arguments('<dir>')
  .option('-e, --exclude [directory]', 'Do not remove "node_modules" within this directory - [Optional]')
  .action((dir) => {
    workingDir = dir
  })

program.on('--help', function () {
  textMsg('')
  textMsg('Examples:')
  textMsg('  $ sad ')
  textMsg('  $ sad -e my_active_project')
  textMsg('  $ sad ~')
  textMsg('  $ sad --help')
})
program.parse(process.argv)

if (typeof (workingDir) === 'undefined') {
  workingDir = '.'
}
const options = program.opts()
if (options.exclude) errorMsg(`Excluding: ${options.exclude}`)

okMsg('Starting..')
console.time('time:spent:onDelete')
for (const folder of walkSync(workingDir)) {
  if(!folder.startsWith(options.exclude)){ 
    warningMsg(` Deleting folder : ${folder}`)
    fsExtra.removeSync(folder)
  }
}
console.timeEnd('time:spent:onDelete')
textMsg('Done!')