Capistrano task for compiling tasks locally

deploy.rb

# UPDATE: This will only work for Capistrano 2.x and probably will not work for Capistrano 3.
#
# This Gist was based on fernando blat post: (http://fernando.blat.es/post/12563486374/optimize-deploy-time-compiling-your-assets-locally)

set :rails_env, 'production'

namespace :assets do
  desc 'Run the precompile task locally and rsync with shared'
  task :precompile do
    run_locally('rm -rf public/assets/*')
    run_locally("RAILS_ENV=#{rails_env} rake assets:precompile")
    run_locally('touch assets.tgz && rm assets.tgz')
    run_locally('tar zcvf assets.tgz public/assets/')
    run_locally('mv assets.tgz public/assets/')
  end

  desc 'Upload precompiled assets'
  task :upload_assets do
    upload "public/assets/assets.tgz", "#{release_path}/assets.tgz"
    run "cd #{release_path}; tar zxvf assets.tgz; rm assets.tgz"
  end
end

before 'deploy:update_code', 'assets:precompile'
after 'deploy:create_symlink', 'assets:upload_assets'