Gzip assets when deploying with capistrano and Rails 4.2

0.md

Gzip assets when deploying with capistrano and Rails 4.2

assets.rake

# lib/tasks/assets.rake
namespace :assets do
  task :gzip do
    require 'zlib'

    Dir['public/assets/**/*.{js,css}'].each do |path|
      gz_path = "#{path}.gz"
      next if File.exist?(gz_path)

      Zlib::GzipWriter.open(gz_path) do |gz|
        gz.mtime = File.mtime(path)
        gz.orig_name = path
        gz.write(IO.binread(path))
      end
    end
  end
end

cap_assets.rake

# lib/capistrano/tasks/assets.rake
namespace :deploy do
  namespace :assets do
    task :gzip do
      on roles(:web) do
        within release_path do
          execute :bundle, 'exec rake assets:gzip RAILS_ENV=production'
        end
      end
    end
  end
end

deploy.rb

# config/deploy.rb
after 'deploy:assets:precompile', 'deploy:assets:gzip'