Cake watch file

gistfile1.txt

fs         = require 'fs'
{exec}     = require 'child_process'
util       = require 'util'

appFiles  = [
  {
    destination: "path/to/public/scripts/",
    join: true
    output: "application.js"
    files: [
      #path/to/files
    ]
  },
  {
    destination: "path/to/public/scripts/",
    bare: true
    files: [
      #path/to/files
    ]
  },
]
build = (f) ->
  if f.join
    scripts = []
    for x in f.files
      if fs.lstatSync(x).isDirectory()
        scripts.push "#{x}/*.coffee"
      else
        scripts.push x
    cmd = "coffee -#{if f.bare then 'b' else ''}o #{f.destination} --join #{f.output} --compile " + scripts.join ' '
  else
    cmd = "coffee -c#{if f.bare then 'b' else ''}o #{f.destination} " + f.files.join(' ')
  exec cmd, (err, stdout, stderr) ->
    if err
      util.log 'Error compiling coffee file.'
    else
      util.log 'Done building coffee file.'

task 'watch', 'Watch prod source files and build changes', ->
    util.log "Watching for changes in src"
    for x in appFiles
      for file in x.files then do (file) ->
          fs.watchFile file, (curr, prev) ->
              if +curr.mtime isnt +prev.mtime
                  util.log "Saw change in #{file}"
                  for group in appFiles
                    for f in group.files
                      if f is file
                        build group

task 'build', 'Build single application file from source files', () ->
  build g for g in appFiles