gistfile1.rb

namespace :heroku do
  
  desc "Prepare and deploy the application to heroku"
  task :deploy => ['heroku:deploy:default']
  
  namespace :deploy do

    task :default => ['assets:compile', 'assets:minify', :commit, :push, 'assets:cleanup']
    
    desc "Commit pre-deployment changes"
    task :commit do
      puts 'Committing deployment changes'
      system "git add public/stylesheets/compiled public/sprockets.js && git commit -m 'Prepared for heroku deployment'"
    end
    
    desc "Push application to heroku" 
    task :push do
      puts 'Pushing application to heroku'
      system "git push heroku master"
    end
    
    desc "Prepare and deploy the application to heroku and run pending migrations" 
    task :migrations => :default do
      puts 'Running pending migrations'
      system "heroku rake db:migrate"
    end

  end
  
end

namespace :assets do
  
  desc "Compiles and concatenates javascripts and stylesheets"
  task :compile => ['sprockets:install_script', 'sprockets:install_assets'] do
    puts "Compiled and concatenated javascripts"
    system "compass -e production --force"
    puts "Compiled and concatenated stylesheets"
  end
  
  desc "Minifies cached javascript and stylesheets"
  task :minify do
    
    require 'rubygems'
    require 'jsmin'
    require 'cssmin'
  
    Dir.glob("#{File.dirname(__FILE__)}/../../public/stylesheets/compiled/*.css").each do |css| 
      f = ""
      File.open(css, 'r') {|file| f << CSSMin.minify(file)}
      File.open(css, 'w') {|file| file.write(f)}
      puts "Minified #{css}"
    end
  
    Dir.glob("#{File.dirname(__FILE__)}/../../public/sprockets.js").each do |js| 
      f = ""
      File.open(js, 'r') {|file| f << JSMin.minify(file)}
      File.open(js, 'w') {|file| file.write(f)}
      puts "Minified #{js}"
    end
  
  end
  
  desc "Remove compiled and concatenated assets"
  task :cleanup do
    Dir.glob("#{File.dirname(__FILE__)}/../../public/stylesheets/compiled/*.css").each do |css| 
      FileUtils.rm_rf(css)
      system "git rm #{css}"
    end
    puts 'Removed compiled stylesheets'
    Dir.glob("#{File.dirname(__FILE__)}/../../public/sprockets.js").each do |js|
      FileUtils.rm_rf(js)
      system "git rm #{js}"
    end
    puts 'Removed compiled javascripts'
  end
  
end