How to use the rake.rb file? Should I require it inside my rake file?

[jfrux]

When I do require 'sinatra/sprockets/rake' in my Rakefile
and then I run $ rake assets:precompile I'm getting an error:

$ rake assets:precompile
rake aborted!
Don't know how to build task 'environment'
/Users/joshua/Projects/alphasights-sinatra-sprockets/lib/sinatra/sprockets/rake.rb:6:in `block (2 levels) in <top (required)>'
/Users/joshua/.rvm/gems/ruby-2.0.0-p0/bin/ruby_noexec_wrapper:14:in `eval'
/Users/joshua/.rvm/gems/ruby-2.0.0-p0/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => assets:clean:all
(See full trace by running task with --trace)

I removed "environment" from the equation and I then get:

rake aborted!
undefined method `settings' for nil:NilClass
/Users/joshua/Projects/alphasights-sinatra-sprockets/lib/sinatra/sprockets/rake.rb:37:in `block (3 levels) in <top (required)>'
/Users/joshua/Projects/alphasights-sinatra-sprockets/lib/sinatra/sprockets/rake.rb:6:in `block (2 levels) in <top (required)>'
/Users/joshua/.rvm/gems/ruby-2.0.0-p0/bin/ruby_noexec_wrapper:14:in `eval'
/Users/joshua/.rvm/gems/ruby-2.0.0-p0/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => assets:clean:all
(See full trace by running task with --trace)