Node.js compress a directory with tar; and write it to a tmp dir.

simple-tar.coffee

###
Allow the user to download a file or a directory as a _.tar.gz_
compressed version.

###
fs        = require "fs"
{exec}    = require "child_process"
{resolve} = require "path"

# `callback` receives `(tarPath)`
module.exports = (path, callback) ->
  fileName = path.split("/")
  fileName = fileName[fileName.length - 1]
  newPath  = "./tmp/#{ fileName }.tar.gz"
  
  exec "tar -czf '#{ newPath }' '#{ path }'",
  (err, stdout, stderr) ->
    throw err if err
    
    callback newPath