index.js

#!/usr/bin/env node
const { exec } = require('child_process')
const fs = require('fs')
const isWsl = require('is-wsl')

try {
	const cwd = process.cwd()
	const modulesPath = cwd + '/node_modules'

	// check if node_modules exists
	const nodeModulesExist = fs.existsSync(modulesPath)
	if (!nodeModulesExist) {
		throw new Error(`A node_modules directory does not exist in this location - ${cwd}`)
	}
	// shell command
	const platform = process.platform
	const command = () => {
		switch (platform) {
			case 'win32':
				return `powershell "Set-Content -Path '${modulesPath}' -Stream com.dropbox.ignored -Value 1"`
			case 'darwin':
				return `xattr -w com.dropbox.ignored 1 ${modulesPath.replace(/\s+/g, '\ ')}`
			case 'linux':
				return isWsl
					? `powershell.exe -Command "Set-Content -Path '${modulesPath.replace(
							`/mnt/${modulesPath.split('/')[2]}`,
							`${modulesPath.split('/')[2]}:`
					  )}' -Stream com.dropbox.ignored -Value 1"`
					: `attr -s com.dropbox.ignored -V 1 ${modulesPath}`
			default:
				throw new Error('Could not identify your OS')
		}
	}

	// execute shell command
	exec(command(), (error, stdout, stderr) => {
		if (error) {
			throw error
		}
		if (stderr) {
			throw stderr
		}

		console.log('Dropbox is now ignoring node_modules.')
	})
} catch (error) {
	console.log(`Error: ${error.message}`)
}