Gemfile in trailblazer-rails-2.1.4 vs Gemfile in trailblazer-rails-2.1.5

@@ -1,9 +1,30 @@
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in trailblazer-rails.gemspec
 gemspec
 
-# gem "trailblazer", path: "../trailblazer"
-# gem "trailblazer", github: "apotonick/trailblazer"
-# gem "trailblazer-loader", github: "trailblazer/trailblazer-loader"
-# gem "trailblazer-loader", path: "../trailblazer-loader"
+case ENV['GEMS_SOURCE']
+when 'local'
+  gem "reform-rails", path: "../reform-rails"
+  gem "trailblazer", path: "../trailblazer"
+  gem "trailblazer-loader", path: "../trailblazer-loader"
+  gem "trailblazer-cells", path: "../trailblazer-cells"
+  gem "cells-rails", path: "../cells-rails"
+  gem "cells-erb", path: "../cells-erb"
+when 'github'
+  gem "reform-rails", github: "trailblazer/reform-rails"
+  gem "trailblazer", github: "trailblazer/trailblazer"
+  gem "trailblazer-loader", github: "trailblazer/trailblazer-loader"
+  gem "trailblazer-cells", github: "trailblazer/trailblazer-cells"
+  gem "cells-rails", github: "trailblazer/cells-rails"
+  gem "cells-erb", github: "trailblazer/cells-erb"
+when 'custom'
+  eval_gemfile('GemfileCustom')
+else # use rubygems releases
+  gem "reform-rails"
+  gem "trailblazer"
+  gem "trailblazer-loader"
+  gem "trailblazer-cells"
+  gem "cells-rails"
+  gem "cells-erb"
+end