How to set, require and use a ruby ​​gem

I am trying to use rakein my ruby ​​script ... (Ruby 1.8.6, JRuby 1.6.5)

A loaded rake using gem install --remote rake, looks normal during installation ...

Fetching: rake-0.9.2.2.gem (100%)
Successfully installed rake-0.9.2.2
1 gem installed

I have a simple ruby ​​script that works fine, but when I import raketo use any of the following requires, it starts complaining ....

require 'rake'
LoadError: no such file to load -- rake
  or
require '/lib/rake'
LoadError: no such file to load -- lib/rake

After some searching, I found that adding require 'rubygems'just before rakefixes the problem ....

require 'rubygems'
require 'rake'

Despite the fact that it works, I have some questions ...

• The gem specification doesn't rakeshow require_pathhow lib, so why doesn't it work require '/lib/rake'? Do I not understand the meaning require_path?

• require 'rubygems' require 'rake'