Add support for packager to build one-click installers

.gitignore

@@ -29,3 +29,4 @@ devbin
 vendor/ruby
 vendor
 Gemfile.lock
+Compass.pkg

Gemfile

@@ -2,6 +2,7 @@ source :rubygems
 
 gemspec
 
+unless ENV['PKG']
 gem "cucumber", "~> 1.1.4"
 gem "rspec", "~>2.0.0"
 gem "rails", "~> 3.1"
@@ -25,4 +26,6 @@ unless ENV["CI"]
   gem 'guard'
   gem 'guard-test'
   gem 'guard-cucumber'
+  gem 'packager'
+end
 end

Rakefile

@@ -1,7 +1,16 @@
 require 'rubygems'
+if ENV["PKG"]
+  $: << File.expand_path(File.dirname(__FILE__))+"/lib"
+else
   require 'bundler'
   Bundler.setup 
-require 'rake/dsl_definition' rescue nil
+end
+
+begin
+  require 'rake/dsl_definition'
+rescue LoadError
+  #pass
+end
 require 'compass'
 
 # ----- Default: Testing ------
@@ -10,12 +19,17 @@ task :default => [:test, :features]
 
 require 'rake/testtask'
 require 'fileutils'
+
+begin
 require 'cucumber'
 require 'cucumber/rake/task'
 
 Cucumber::Rake::Task.new(:features) do |t|
   t.cucumber_opts = "features --format progress"
 end
+rescue LoadError
+  $stderr.puts "cannot load cucumber"
+end
 
 Rake::TestTask.new :test do |t|
   t.libs << 'lib'
@@ -124,3 +138,20 @@ rescue LoadError => e
   puts "WARNING: #{e}"
 end
 
+begin
+  require 'packager/rake_task'
+  require 'compass/version'
+  # Building a package:
+  # 1. Get packager installed and make sure your system is setup correctly according to their docs.
+  # 2. Make sure you are actually using a universal binary that has been nametooled.
+  # 3. PKG=1 OFFICIAL=1 rake packager:pkg
+  Packager::RakeTask.new(:pkg) do |t|
+    t.package_name = "Compass"
+    t.version = Compass::VERSION
+    t.domain = "compass-style.org"
+    t.bin_files = ["compass"]
+    t.resource_files = FileList["frameworks/**/*"] + ["VERSION.yml", "LICENSE.markdown"]
+  end
+rescue LoadError => e
+  puts "WARNING: #{e}"
+end