ERROR: 'rake/rdoctask' is obsolete and no longer supported

Question

Out of the blue, I started getting the following error message:

(in /Users/me/.rvm/gems/ruby-1.9.3-p125@mysql2/gems/rails-0.9.5)
rake aborted!
ERROR: \'rake/         


        

Answer 1

The following works for me using ruby 1.9.3p448 (2013-06-27 revision 41675):

1) Use rake version 10.1.0 (put following in your Gemfile):

gem 'rake', '10.1.0'

(Note you can likely use another version, but the line number below might change.)

2) Comment line 54 of your Rakefile and replace it as follows:

#require 'rake/rdoctask'
gem 'rdoc', ">= 2.4.2"
require 'rdoc/task'

3) Test

$ bundle install
$ bundle exec rake