Allow to set RAILS_GROUPS for assets:precompile

CHANGELOG.md

@@ -1,6 +1,7 @@
 # [master][]
 
 * Your contribution here!
+* rails_assets_groups config option to set RAILS_GROUPS (https://github.com/capistrano/rails/pull/135)
 
 # [1.2.3][] (Mar 4 2017)
 

README.md

@@ -71,6 +71,9 @@ set :assets_roles, [:web, :app]
 # This should match config.assets.prefix in your rails config/application.rb
 set :assets_prefix, 'prepackaged-assets'
 
+# RAILS_GROUPS env value for the assets:precompile task. Default to nil.
+set :rails_assets_groups, :assets
+
 # If you need to touch public/images, public/javascripts, and public/stylesheets on each deploy
 set :normalize_asset_timestamps, %w{public/images public/javascripts public/stylesheets}
 

lib/capistrano/tasks/assets.rake

@@ -65,7 +65,7 @@ namespace :deploy do
     task :precompile do
       on release_roles(fetch(:assets_roles)) do
         within release_path do
-          with rails_env: fetch(:rails_env) do
+          with rails_env: fetch(:rails_env), rails_groups: fetch(:rails_assets_groups) do
             execute :rake, "assets:precompile"
           end
         end