Capistrano Pre-compile Assets Locally and Deploy through Git

example_deploy.rb

#
# One solution for deploying assets to production servers through git while 
# precompiling the assets on the local development system.
#
# By Frank Rietta
# Copyright 2012 Rietta Inc. All Rights Reserved.
# Licensed as open source under terms of the BSD license.
#
# The script switches to the deploy branch, syncs it down, merges the changes from master, precompiles the
# assets and then pushes those to the deploy branch on remote so that the capistrano script can deploy the
# latest code.
#

namespace :preflight do
  task :prepare_assets_in_git do
    %x{bundle update}
    %x{git checkout deploy}
    %x{git pull origin deploy}
    %x{git merge master}
    %x{bundle exec rake assets:precompile}
    %x{git add .}
    %x{git commit -m "Automatic deployment"}
    %x{git push origin deploy}
  end
end

# ... Your Deploy Code Here ...

# Compile bundle and gems into the vendors/cache directory
before "deploy:update_code", 'preflight:prepare_assets_in_git'