rakefile

#!/usr/bin/env ruby

ROOT = File.expand_path('.')
TMP = File.join(ROOT, 'tmp')
DEPLOY = File.join(ROOT, '.deploy')
DATASTORE = File.join(TMP, 'drydrop.datastore')
HISTORY = File.join(TMP, 'drydrop.datastore.history')
DRYAPP = File.join(ROOT, 'dryapp')
GAE = File.join(ROOT, 'gae')
GAEEXEC = File.join(ROOT, 'gae', 'python')

NEED_GEMS = %w(rubyzip)
NEED_EGGS = %w()

OSX = PLATFORM =~ /darwin/
WIN = PLATFORM =~ /win32/
NIX = !(OSX || WIN)

APPSERVER_OPTS = "" #"--debug --debug_imports"
APPCFG_OPTS = ""

DRYAPP_TERM_COLOR = [10000,0,10000]

require "rubygems"
require 'yaml'

# http://kpumuk.info/ruby-on-rails/colorizing-console-ruby-script-output/
begin
  require 'Win32/Console/ANSI' if WIN
rescue LoadError
  raise 'You must "sudo gem install win32console" to use terminal colors on Windows'
end

begin
  require 'appscript' if OSX
  include Appscript if OSX
rescue LoadError
  raise 'You must "sudo gem install rb-appscript"'
end

begin
  require 'zip/zip'
rescue LoadError
  raise 'You must "sudo gem install rubyzip"'
end

def colorize(text, color_code)
  "#{color_code}#{text}\e[0m"
end

def red(text); colorize(text, "\e[31m"); end
def green(text); colorize(text, "\e[32m"); end
def yellow(text); colorize(text, "\e[33m"); end
def blue(text); colorize(text, "\e[34m"); end
def magenta(text); colorize(text, "\e[35m"); end
def azure(text); colorize(text, "\e[36m"); end
def white(text); colorize(text, "\e[37m"); end
def black(text); colorize(text, "\e[30m"); end

def file_color(text); yellow(text); end
def dir_color(text); blue(text); end
def cmd_color(text); azure(text); end

#
# you can use FileUtils: http://corelib.rubyonrails.org/classes/FileUtils.html
#
require 'find'

def cp_dir(src, dst)
    puts "#{cmd_color('Copying')} #{dir_color(src)}"
    puts "     -> #{dir_color(dst)}"
    Find.find(src) do |fn|
      next if fn =~ /\.(svn|git)/ 
      next if fn =~ /\.pyc$/ 
      next if fn =~ /\.DS_Store$/ 
      next if fn =~ /Thumbs\.db$/ 
      next if fn =~ /^\./ 
      r = fn[src.size..-1]
      if File.directory? fn
        mkdir(File.join(dst,r), {:verbose => false}) unless File.exist? File.join(dst,r)
      else
        cp(fn, File.join(dst,r), {:verbose => false})
      end
    end
end

def cp_file(src, dst)
  puts "#{cmd_color('Copying')} #{file_color(src)}"
  puts "     -> #{file_color(dst)}"
  cp(src, dst, {:verbose => false})
end

def my_mkdir(dir)
  puts "#{cmd_color('Creating directory')} #{dir_color(dir)}"
  mkdir dir, {:verbose => false}
end

def dep_dir(src)
  cp_dir(File.join(DRYAPP, src), File.join($DEPLOY_DIR, src))
end

def dep_file(src)
  cp_file(File.join(DRYAPP, src), File.join($DEPLOY_DIR, src))
end

def sanitize_path(path)
  path = path.gsub('/', '\\') if WIN
  path = path.gsub('sudo ', '') if WIN
  path
end

def system(path, *params)
  path = sanitize_path(path)
  puts yellow(">> #{path} #{params.join(' ')}")
  Kernel.system(path, *params)
end

def sys(cmd, verbose = true)
  puts yellow("> #{cmd}") if verbose
  `#{sanitize_path(cmd)}`
end

#############################################################################
# helpers

def die(s)
  puts red(s)
  exit(1)
end

def update_sources()
  sys("cd \"#{ROOT}\" && git pull origin master 1>&2")
end

def install_gems(gems)
  gems.each do |g|
    sys("sudo gem install #{g} 1>&2")
  end
end

#
def install_eggs(eggs)
  eggs.each do |e|
    sys("sudo easy_install #{e} 1>&2")
  end
end

def prepare_gae()
  return if File.exists?(GAE)
  sys("svn co http://googleappengine.googlecode.com/svn/trunk/ \"#{GAE}\" 1>&2")
end

def update_gae()
  die "GAE not present at #{GAE}" unless File.exists?(GAE)
  sys("cd \"#{GAE}\" && svn up 1>&2")
end

def remove_gae()
  return unless File.exists?(GAE)
  die "dir \"#{GAE}\" seems to be invalid" if GAE.size<"/gae".size
  sys("rm -Rf \"#{GAE}\" 1>&2")
end

def get_app_server_pid()
  if NIX
    res = sys("ps au|grep dev_appserver")
    return unless res
    lines = res.split("\n")
    return unless lines[1]
    return lines[1].split(' ')[1] unless lines[1]=~/grep/i
    nil
  else
    res = sys("ps -a|grep dev_appserver")
    return unless res
    lines = res.split("\n")
    lines.each do |line|
      return line.split(' ').first unless line=~/grep/i
    end
    nil
  end
end

def shutdown_dryapp()
  pid = get_app_server_pid()
  return unless pid
  puts "Shutdowning DryApp (PID=#{pid})"
  sys("kill #{pid} 1>&2")
end

def run_in_terminal(cmd, title, background=[0,0,0])
  if OSX
    # see http://www.nach-vorne.de/2007/11/22/terminal-trick
    # and http://onrails.org/articles/2007/11/28/scripting-the-leopard-terminal
    # and http://blog.cbciweb.com/articles/2008/05/02/scripting-mac-terminal-using-ruby
    begin
      puts yellow("!> #{cmd}")
      term = app('Terminal')
      term.activate()
      current_window = term.windows.first
      old_tab = current_window.selected_tab.get()

      tab = find_terminal_tab(background)
      unless tab
        app("System Events").application_processes["Terminal.app"].keystroke("t", :using => :command_down)
        tab = current_window.tabs.last
      end
      term.do_script(cmd, :in => tab)
      tab.background_color.set(background)
      tab.title_displays_custom_title.set(true)
      tab.custom_title.set(title)
      current_window.selected_tab.set(old_tab)
      sleep 0.1
    rescue
      die "OSX command failed"
    end
  else
    system(cmd)
  end
end

def find_terminal_tab(color)
  return unless OSX

  term = app('Terminal')
  term.windows.get.each do |win|
    begin
      win.tabs.get.each do |tab|
        return tab if color == tab.background_color.get()
      end
    rescue
    end
  end
  nil
end

def app_server_cmd(opts=nil)
  server = 'dev_appserver.py'
  server = "#{GAEEXEC}/#{server}" if File.exists?(GAEEXEC)
  opts = opts || APPSERVER_OPTS
  "#{server} #{opts} --datastore_path=#{DATASTORE} --history_path=#{HISTORY} #{DRYAPP}"
end

def appcfg_cmd(command='')
  server = 'appcfg.py'
  server = "#{GAEEXEC}/#{server}" if File.exists?(GAEEXEC)
  "#{server} #{APPCFG_OPTS} #{command}"
end

def run_dryapp()
  sys("mkdir \"#{TMP}\" 1>&2") unless File.exists?(TMP)
  puts 'Running DryApp (server-side) ...'
  run_in_terminal("cd #{DRYAPP} && clear && #{app_server_cmd}", 'DryApp', DRYAPP_TERM_COLOR)
end

def clear_datastore()
  sys("#{app_server_cmd('--clear_datastore')} 1>&2")
end


def git_info_from_working_copy
  $git_info = sys("git show | grep commit | cut -d\" \" -f2").strip
end

def zip_python_module(name)
  dep_dir(name)
  $modules << name
end

def patch_main_py()
  path = File.expand_path(File.join($DEPLOY_DIR, 'drydrop_handler.py'))
  puts "#{cmd_color('Patching')} #{file_color(path)}"
  
  lines = []
  File.open(path, "r") do |f|
    f.each do |line|
      if line =~ /# GENERATED: here we will setup import paths for baked version !!!/
        $modules.each do |m|
          lines << line.gsub(/# GENERATED: here we will setup import paths for baked version !!!/, 
            "if '#{m}.zip' not in sys.path: sys.path.insert(0, '#{m}.zip');")
        end
      else
        lines << line
      end
    end
  end
  File.open(path, "w") do |f|
    f << lines
  end
end

# force persistent timestamps inside zip for uploading only incremental changes
module Zip
  class ZipFile
    def add(entry, srcPath, &continueOnExistsProc)
      continueOnExistsProc ||= proc { false }
      check_entry_exists(entry, continueOnExistsProc, "add")
      newEntry = entry.kind_of?(ZipEntry) ? entry : ZipEntry.new(@name, entry.to_s, "", "", 0, 0, 
        ZipEntry::DEFLATED, 0, time  = Time.local(2000,"jan",1,0,0,0))
      newEntry.gather_fileinfo_from_srcpath(srcPath)
      @entrySet << newEntry
    end
  end
end

def zipit(fn, prefix = "")
  puts "#{cmd_color('Zipping')} #{dir_color(fn)}"
  dst = "#{fn}.zip"
  Zip::ZipFile.open(dst, Zip::ZipFile::CREATE) { |zipfile|
    Find.find(fn) do |f|
      next if File.directory? f
      r = f[fn.size+1..-1]
      r = prefix+"/"+r if prefix.size>0
      zipfile.add(r, f)
    end
  }
  File.chmod(0644, dst)
  sys("rm -rf \"#{fn}\"", false)
end

def bake(name)
  $modules = []
  
  git_info_from_working_copy()
  die('not under git version control!') if $git_info == ''
  version = $git_info[0..6]

  $DEPLOY_DIR = File.join(DEPLOY, "#{version}")
  die "something bad with deploy dir #{deploy_dir}" if $DEPLOY_DIR.size<=".deploy".size
  
  sys("rm -rf \"#{$DEPLOY_DIR}\" 1>&2") if File.exists?($DEPLOY_DIR)
  my_mkdir($DEPLOY_DIR)
  
  dep_file('app.yaml')
  dep_file('index.yaml')
  dep_file('drydrop_handler.py')

  zip_python_module('drydrop')
  zip_python_module('routes')
  zip_python_module('yaml')
  zip_python_module('simplejson')
  zip_python_module('jinja2')
  zip_python_module('firepython')
  zip_python_module('pygments')
  
  $modules.each do |mod|
    src = File.join($DEPLOY_DIR, mod)
    zipit(src, mod)
  end

  patch_app_yaml(version, name)
  patch_main_py()

  sys("cd \"#{$DEPLOY_DIR}\" && find . -exec touch -am -t 01010000.00 '{}' ';'")
end

def remove_from_deploy_dir(path)
  die "something bad with dir #{path}" if path.size<"deploy".size
  puts "#{cmd_color('Removing')} #{dir_color(path)}"
  sys("rm -rf \"#{path}\"")
end

def patch_app_yaml(version, name)
  path = File.expand_path(File.join($DEPLOY_DIR, 'app.yaml'))
  puts "#{cmd_color('Patching')} #{file_color(path)}"
  lines = []
  File.open(path, "r") do |f|
    f.each do |line|
      lines << line.gsub(/^application:.*$/, "application: #{name}")
    end
  end
  File.open(path, "w") do |f|
    f << lines
  end
end

def clear_pyc()
  puts "#{cmd_color('Removing all *.pyc in '+DRYAPP)}"
  sys("cd \"#{ROOT}\" && find . -name \"*.pyc\" -exec rm '{}' ';'")
end

def touch_js()
  puts "#{cmd_color('Touching all *.js in '+DRYAPP)}"
  sys("cd \"#{ROOT}\" && find . -name \"*.js\" -exec touch '{}' ';'")
end

def touch_html()
  puts "#{cmd_color('Touching all *.html in '+DRYAPP)}"
  sys("cd \"#{ROOT}\" && find . -name \"*.html\" -exec touch '{}' ';'")
end

def cache_buster()
  clear_pyc()
  touch_js()
  touch_html()
end

#############################################################################

#----------------------------------------------------------------------------
desc "(re)starts server (=> http://localhost:8080)"
task :start do
  shutdown_dryapp()
  cache_buster()
  run_dryapp()
  puts blue('-> http://localhost:8080/')
end

#----------------------------------------------------------------------------
desc "stops server"
task :stop do
  shutdown_dryapp()
end

#----------------------------------------------------------------------------
desc "updates project sources from github"
task :update do
  update_sources()
end

#----------------------------------------------------------------------------
desc "installs dependencies"
task :setup do
  install_gems(NEED_GEMS)
  install_eggs(NEED_EGGS)
end

#----------------------------------------------------------------------------
desc "switches to edge GAE (svn checkout from code.google.com)"
task :edge_gae do
  prepare_gae()
  update_gae()
end

#----------------------------------------------------------------------------
desc "switches to system GAE (!!! removes $drydrop/gae directory)"
task :site_gae do
  remove_gae()
end

#----------------------------------------------------------------------------
desc "clears datastore"
task :clear do
  clear_datastore()
end

#----------------------------------------------------------------------------
desc "removes all *.pyc in subtree, touches *.(js|html)"
task :cache_buster do
  cache_buster()
end

#----------------------------------------------------------------------------
desc "bakes version for deploy"
task :bake do
  name = ENV["project"]
  die("Please specify appengine project name: rake upload project=drydroptest") unless name
  
  answer = sys("git status")
  is_clean = !!answer.match(/working directory clean/)

  puts 'Baking version ...'
  sys("mkdir \"#{DEPLOY}\" 1>&2") unless File.exists?(DEPLOY)
  bake(name)
  puts red("Your working copy is not clean. You should commit all changes.") unless is_clean
end

#----------------------------------------------------------------------------
desc "uploads baked version to appspot"
task :upload => :bake do
  puts 'Uploading version to appspot ...'
  system(appcfg_cmd("update \"#{$DEPLOY_DIR}\""))
end

#----------------------------------------------------------------------------
desc "removes deploy directory"
task :clean_deploy do
  sys("rm -rf \"#{DEPLOY}\"")
end

#----------------------------------------------------------------------------
task :default => :start