Undefined method `find_by_name' for Gem::Specification:Class

Question

I created the spec/ structure for my puppet module using rspec-puppet-init. However, I am getting this strange error: Undefined method find_by_name for Gem::Specification:Class. I am running ruby 1.8.7 for RHEL6.

$ rake spec
(in /etc/puppet/modules/profiles)
rake aborted!
undefined method `find_by_name' for Gem::Specification:Class
/etc/puppet/modules/profiles/Rakefile:22
(See full trace by running task with --trace)

I then ran it with --trace and get this:

rake aborted!
undefined method `find_by_name' for Gem::Specification:Class
/etc/puppet/modules/profiles/Rakefile:22
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2382:in `load'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2382:in `raw_load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2067:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2015:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1999:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2067:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1997:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19

In my Rakefile (this is autogenerated):

require 'rake'
require 'rspec/core/rake_task'

desc "Run all RSpec code examples"
RSpec::Core::RakeTask.new(:rspec) do |t|
  t.rspec_opts = File.read("spec/spec.opts").chomp || ""
end

SPEC_SUITES = (Dir.entries('spec') - ['.', '..','fixtures']).select {|e| File.directory? "spec/#{e}" }
namespace :rspec do
  SPEC_SUITES.each do |suite|
    desc "Run #{suite} RSpec code examples"
    RSpec::Core::RakeTask.new(suite) do |t|
      t.pattern = "spec/#{suite}/**/*_spec.rb"
      t.rspec_opts = File.read("spec/spec.opts").chomp || ""
    end
  end
end
task :default => :rspec

begin
  if Gem::Specification::find_by_name('puppet-lint')
    require 'puppet-lint/tasks/puppet-lint'
    PuppetLint.configuration.ignore_paths = ["spec/**/*.pp", "vendor/**/*.pp"]
    task :default => [:rspec, :lint]
  end
rescue Gem::LoadError
end

Any idea what is wrong? I am not a ruby expert by any means.

My RubyGems Environment:

RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.7
  - RUBY VERSION: 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]
  - INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: /usr/bin/ruby
  - EXECUTABLE DIRECTORY: /usr/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /usr/lib/ruby/gems/1.8
     - /home/staticx/.gem/ruby/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/

Answer 1

Per @engineersmnky, I ran the following:

$ gem update --system

I then had to re-run these commands:

$ sudo gem install rake
$ sudo gem install puppetlabs_spec_helper
$ sudo gem install puppet-lint