Automatically skip assets precompiling if no changes were made.

README.md

Assets precompiling

Automatically skip assets precompiling if no changes were made.

Be sure you have lib/assets vendor/assets lib/assets/ directories !! If want to have empty directories, create .keep file !

assets.rb

# config/recipes/assets.rb
namespace :deploy do
  namespace :assets do
    task :precompile, roles: :web, except: { no_release: true } do
      from = source.next_revision(current_revision)
      if releases.length <= 1 || capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ lib/assets/ app/assets/ | wc -l").to_i > 0
        run %Q{cd #{latest_release} && #{rake} RAILS_ENV=#{rails_env} #{asset_env} assets:precompile}
      else
        logger.info "Skipping asset pre-compilation because there were no asset changes"
      end
    end
  end
end

Capfile

load 'deploy' if respond_to?(:namespace) # cap2 differentiator
load 'deploy/assets'
Dir['config/recipes/*.rb'].each { |plugin| load(plugin) }
load 'config/deploy'