crafterm / sprinkle

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Sprinkle is a software provisioning tool you can use to build remote servers with. eg. to install a Rails, or Sinatra stack on a brand new slice directly after its been created

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sprinkle / lib / sprinkle / verifiers / ruby.rb
100644 25 lines (22 sloc) 0.826 kb
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module Sprinkle
  module Verifiers
    # = Ruby Verifiers
    #
    # The verifiers in this module are ruby specific. 
    module Ruby
      Sprinkle::Verify.register(Sprinkle::Verifiers::Ruby)
      
      # Checks if ruby can require the <tt>files</tt> given. <tt>rubygems</tt>
      # is always included first.
      def ruby_can_load(*files)
        # Always include rubygems first
        files = files.unshift('rubygems').collect { |x| "require '#{x}'" }
        
        @commands << "ruby -e \"#{files.join(';')}\""
      end
      
      # Checks if a gem exists by calling "sudo gem list" and grepping against it.
      def has_gem(name, version=nil)
        version = version.nil? ? '' : version.gsub('.', '\.')
        @commands << "sudo gem list | grep -e '^#{name} (.*#{version}.*)$'"
      end
    end
  end
end