Wrap your amazing Rakefile in a gem

wrake.md

$ bundle gem wrake
$ cd wrake
$ vi wrake.gemspec
  - Fill in TODOs on description and summary
  - Add 'rake' runtime depedency at the bottom
    - spec.add_runtime_dependency "rake"

$ vi lib/wrake/Rakefile

# lib/wrake/Rakefile
desc "Prints 'hello'"
task :hello do
  puts 'hello'
end

task default: :hello

$ mkdir bin
$ vi bin/wrake

#!/usr/bin/env ruby
# bin/wrake

require 'wrake'

rakefile = File.join(
  File.expand_path(File.join(File.dirname(__FILE__), '..')),
  'lib', 'wrake', 'Rakefile'
)

puts `rake -f #{rakefile} #{ARGV.join ' '}`

$ git add --all && git commit -m 'Initial commit'
$ bundle exec rake install
$ wrake -T
  # rake hello  # Prints 'hello'