Pass parent BUNDLE_GEMFILE when shell out

Author: zetachang

.travis.yml

@@ -5,7 +5,6 @@ rvm:
   - 2.1
   - jruby-19mode
 script:
-  - BUNDLE_GEMFILE=$PWD/Gemfile bundle install
   - bundle exec rake test_app
   - bundle exec rake
 gemfile:

spec/reactive-ruby/rails/asset_pipeline_spec.rb

@@ -3,7 +3,8 @@
 if ruby?
 RSpec.describe 'test_app generator' do
   it "does not interfer with asset precompilation" do
-    expect(system("cd spec/test_app; bundle exec rake assets:precompile")).to be_truthy
+    env = { "BUNDLE_GEMFILE" => ENV['BUNDLE_GEMFILE'] }
+    expect(system(env, "cd spec/test_app; bundle exec rake assets:precompile")).to be_truthy
   end
 end
 end