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newclear gem logo

newclear Gem Version - Your one line and relax solution to a ground up rebuild of your iOS or Android RubyMotion app.


Sometimes a build gets FUBAR. When you run rake newclear it builds your project from the ground up without you having to interact at each step in the rebuild process. Just type and chillax. We simplify the clean-up to a memorable and automated task.


newclear comes with 4 helpful rake tasks but... 99% of the time you want to run rake newclear.

👑 [bundle exec] rake newclear

The most common and useful command. newclear gives you a new and clear run of your build. All assets cleaned out and then built in the correct order! This is great for kicking off the rebuild to clear any cruft that might be crashing your app.

This runs our nuke task and then rake (rake device for android if you have no emulator running). Ergo, anything run with newclear is like running on a fresh machine.

How does it all work?


Just kidding. If you want to trace the logic, here you go! newclear logic tree

Ancillary Rake Tasks

[bundle exec] rake newb

Sometimes helpful, newb gives you a new build of your app. This is excellent for clearing out data before a test, or making sure your application is built in the correct order.

This runs our nuke task and then rake build:simulator.

[bundle exec] rake nuke

Useful for preparing the build, the nuke task clears everything from previous builds and fetches fresh resources in the correct order. After a nuke, you can be sure that your next build is ready to go.

This will start off with a complete rake clean:all which removes all compiled builds. We then do a speedy bundle install (3 jobs) as your RM resources must be in place before any 3rd party dependencies. Lastly, we verify if you're using pods/gradle and install dependencies appropriately.

[bundle exec] rake newclear:debug

newclear:debug gives you the detected parameters of your setup. If you have any complication with newclear, be sure to use this to makes sure newclear is detecing your system setup correctly.


Add this line to your application's Gemfile:

gem 'newclear'

And then execute:

$ bundle

Or install it yourself as:

$ gem install newclear


We're using Rickert's lovely reset-sim gem in our nuke (when dealing with iOS). So be sure to have accessibility turned on for your terminal, as suggested on the gem's github page


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Update the flow-chart if applicable Flow-Chart
  6. Hula hoop and down a beer in under a minute.
  7. Create new Pull Request


our one line and relax solution to a ground up rebuild of your iOS or Android RubyMotion app.







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