This post originated from an RSS feed registered with Ruby Buzz by Jan Lelis. Original Post: Requirements: A Mini RubyGems plugin Feed Title: rbJ*_*L.net Feed URL: http://feeds.feedburner.com/rbJL Feed Description: Hi, I am a fan of Ruby and like to explore it and the world around ;). So I started this blog, where I am publishing code snippets, tutorials for beginners as well as general thoughts about Ruby, the web or programming in general. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Jan Lelis Latest Posts From rbJ*_*L.net

The .gemspec file of a gem allows to specify requirements for that gem – but usually you do not get to see them. These five lines patch RubyGems, so that gem displays the requirements of a gem after it has been installed:

Listing 1

/38/gem_requirements.rb

Gem.post_install do |gem|
  gem.spec.requirements.each{ |req|
    puts "Please note, the #{gem.spec.name} gem requires: #{req}"
  }
end

github, gem install requirements