Simple script to backup all my stuff

servant.js

#!/usr/bin/env node

var fs = require('fs');

function help() {
  var output = [
    'servant - help you handle those tiny little things',
    '',
    'Usage:',
    '   servant config - Display servant config files',
    '   servant backup - Backup your basic config files',
    '   servant recover - Recover your config files'
  ].join("\n");
  console.log(output);
}

function getConfig() {
  var home = process.env.HOME || '/tmp';
  var target = home + '/Dropbox/Backup';
  var setting = {
    "backup": [
      {from: home + '/.bashrc', to: target + '/bashrc'},
      {from: home + '/.bash_profile', to: target + '/bash_profile'}
    ]
  };
  return setting;
}

function backup(type) {
  if (type != 'backup' && type != 'recover') return;

  var config = getConfig();
  config.backup.forEach(function(c) {
    var from, to;
    if (type == 'backup') {
      from = c.from;
      to = c.to;
    } else {
      from = c.to;
      to = c.from;
    }

    var rStream = fs.createReadStream(c.from);
    var wStream = fs.createWriteStream(c.to);
    rStream.pipe(wStream);

    rStream.on('error', function(e) {
      console.error(c.from + " does not exist!");
      process.exit(1);
    });
    wStream.on('error', function(e) {
      console.error("Backup to " + c.to + " fail!");
      process.exit(1);
    });
  });
}

if (process.argv.length < 3) {
  help();
  process.exit(1);
} else {
  switch(process.argv[2]) {
    case 'config':
      break;
    case 'backup':
      backup('backup');
      break;
    case 'recover':
      backup('recover');
      break;
    default:
      console.error('Not support this action!');
      help();
      process.exit(1);
  }
}