CAKEFILE

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


package = "Backpack"

src_path    = "./src"
lib_path    = "./lib"
js_path     = "#{lib_path}/js"
bndl_path   = "#{lib_path}/#{package}-bundle.js"
min_path    = "#{lib_path}/#{package}-bundle.min.js"
nm_path     = "./node_modules"
bin_path    = "#{nm_path}/.bin"
spec_path   = "./spec"
spec_lib_path = "#{spec_path}/lib"
spec_src_path = "#{spec_path}/src"
spec_bndl_path = "#{spec_lib_path}/#{package}Spec-bundle.js"


run = (command, callback) ->
  # executes a command and runs a callback when it's done,
  # prints out info while it's doing so
  proc = exec command
  proc.stdout.on 'data', (data) -> print data.toString()
  proc.stderr.on 'data', (data) -> print data.toString()
  proc.on 'exit', (status) -> callback?() if status is 0

# ----------------------------------
# Commands
# ----------------------------------

compile = (watch, callback) ->
  # creates /lib_path/js
  run "#{bin_path}/coffee -co #{js_path} #{src_path}", callback

watchJS = (callback) ->
  # recompiles /src_path to individual JavaScript files in /lib_path/js
  run "#{bin_path}/coffee -wco #{js_path} #{src_path}", callback

watchBundle = (callback) ->
  # recompiles and joins /src_path to /lib_path
  run "#{bin_path}/coffee -j #{bndl_path} -wco #{lib_path} #{src_path}", callback

watchSpecBundle = (callback) ->
  run "#{bin_path}/coffee -j #{spec_bndl_path} -wco #{spec_path} #{spec_src_path}", callback

bundle = (callback) ->
  # creates /lib_path/Backpack-bundle.js
  run "#{bin_path}/coffee -j #{bndl_path} -co #{lib_path} #{src_path}", callback

minify = (callback) ->
  # creates /lib_path/Backpack-bundle.min.js
  run "#{bin_path}/uglifyjs  -o #{min_path} #{bndl_path}", callback

test = (callback) ->
  run "open #{spec_path}/SpecRunner.html", callback

docs = (callback) ->
  run "#{bin_path}/docco #{src_path}/*.coffee", callback


# ----------------------------------
# Tasks
# ----------------------------------

task 'compile', 'Compile CoffeeScript source files', ->
  compile()

task 'build', "Creates /lib_path/Backpack-bundle.js & /lib_path/Backpack-bundle.min.js & /lib_path/js/*.js", ->
  compile(bundle(minify))

task 'test', "Opens Jasmine SpecRunner. Watches BackpackSpec-Bundle.js for changes", ->
  bundle(test(watchSpecBundle))

task 'docs', 'Generate annotated source code with Docco', ->
  docs()

task 'watch', "Recompile CoffeeScript source files when modified to Backpack-bundle.js", ->
  watchBundle()

task 'watch:js', "Recompile CoffeeScript source files when modified to individual .js files", ->
  watchJS()