hello.rake

task :hello do
  boot_file = File.expand_path('../../../config/boot', __FILE__)

  require 'rubygems'
  require boot_file
  require 'irb'

  IRB.start
end

output.txt

$ rake hello --trace
** Invoke hello (first_time)
** Execute hello
rake aborted!
No such file or directory - hello
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/magic-file.rb:7:in `initialize'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/magic-file.rb:7:in `open'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/magic-file.rb:7:in `open'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/input-method.rb:77:in `initialize'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/context.rb:82:in `new'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/context.rb:82:in `initialize'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb.rb:99:in `new'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb.rb:99:in `initialize'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb.rb:56:in `new'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb.rb:56:in `start'
/www/myproject/lib/tasks/hello.rake:8:in `block in <top (required)>'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/Users/brad/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/bin/rake:19:in `load'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/bin/rake:19:in `<main>'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/bin/ruby_noexec_wrapper:14:in `eval'
/Users/brad/.rvm/gems/ruby-1.9.3-p194@global/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => hello