1  
   2  class Time
   3  
   4    # this code adds a Time.freeze method to make time "stand still"
   5    # during execution of a block. This can be helpful during testing of
   6    # methods that depend on Time.new or Time.now
   7    #
   8    # Example:
   9    #
  10    #   Time.freeze do
  11    #      puts Time.new.to_f
  12    #      # ... do stuff; real time passes
  13    #      puts Time.new.to_f     # outputs same time as above
  14    #   end
  15    #   # ... time returns to normal
  16    #
  17    # An optional Time object may be passed to freeze to a specific time:
  18    #
  19    #   Time.freeze(Time.at(2007, 11, 15)) do
  20    #      # ...
  21    #   end
  22    #
  23    # While inside the block, Time.frozen? will return true
  24  
  25    class << self
  26  
  27      def now
  28        @time || orig_new
  29      end
  30  
  31      alias_method :orig_freeze, :freeze
  32      alias_method :orig_new, :new
  33      alias_method :new, :now
  34  
  35      # makes time "stand still" during execution of a block. if no time is
  36      # supplied, the current time is used. While in the block, Time.new and
  37      # Time.now will always return the "frozen" value.
  38      def freeze(time = nil)
  39        raise "A block is required" unless block_given?
  40        begin
  41          prev = @time
  42          @time = time || now
  43          yield
  44        ensure
  45          @time = prev
  46        end
  47      end
  48  
  49      def frozen?
  50        !@time.nil?
  51      end
  52  
  53    end
  54  end

   1  
   2  namespace :rails do
   3    namespace :freeze do
   4      desc "Lock to a specific rails version. Defaults to 1.1.5 or specify with RELEASE=x.y.z"
   5      task :version do
   6        rel = ENV['RELEASE'] || '1.1.5'
   7        tag = 'rel_' + rel.split(/[.-]/).join('-')
   8        rails_svn = "http://dev.rubyonrails.org/svn/rails/tags/#{tag}"
   9  
  10        puts "Freezing to #{tag} using #{rails_svn}"
  11        sh "type svn"
  12        
  13        dir = 'vendor/rails'
  14        rm_rf dir
  15        mkdir_p dir
  16        for framework in %w( railties actionpack activerecord actionmailer activesupport actionwebservice )
  17          checkout = "#{dir}/#{framework}"
  18          sh "svn export #{rails_svn}/#{framework} #{checkout}"
  19          unless test ?d, checkout then
  20            puts "ERROR: checkout missing: #{checkout}"
  21            exit 1
  22          end
  23        end
  24      end
  25    end
  26  end

   1  
   2  rake rails:freeze:version