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toddsampson/IsThisGemInstalled.rb

Created November 13, 2013 21:04
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Gist for Discovering if a Gem was Installed blog post: http://www.cloudspace.com/blog/?s=Is+this+gem+installed%3F
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IsThisGemInstalled.rb
dependency = Gem::Dependency.new "authlogic", ">2"
specs = Gem.source_index.search dependency
puts "the gem is not installed" if specs.empty?
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