lib/irb/workspace.rb

   1 #
   2 #   irb/workspace-binding.rb -
   3 #       $Release Version: 0.9.5$
   4 #       $Revision: 11708 $
   5 #       $Date: 2007-02-12 15:01:19 -0800 (Mon, 12 Feb 2007) $
   6 #       by Keiju ISHITSUKA(keiju@ruby-lang.org)
   7 #
   8 # --
   9 #
  10 #
  11 #
  12 module IRB
  13   class WorkSpace
  14     # create new workspace. set self to main if specified, otherwise
  15     # inherit main from TOPLEVEL_BINDING.
  16     def initialize(*main)
  17       if main[0].kind_of?(Binding)
  18         @binding = main.shift
  19       elsif IRB.conf[:SINGLE_IRB]
  20         @binding = TOPLEVEL_BINDING
  21       else
  22         case IRB.conf[:CONTEXT_MODE]
  23         when 0  # binding in proc on TOPLEVEL_BINDING
  24           @binding = eval("proc{binding}.call",
  25                       TOPLEVEL_BINDING,
  26                       __FILE__,
  27                       __LINE__)
  28         when 1  # binding in loaded file
  29           require "tempfile"
  30           f = Tempfile.open("irb-binding")
  31           f.print <<EOF
  32           $binding = binding
  33 EOF
  34           f.close
  35           load f.path
  36           @binding = $binding
  37
  38         when 2  # binding in loaded file(thread use)
  39           unless defined? BINDING_QUEUE
  40             require "thread"
  41
  42             IRB.const_set("BINDING_QUEUE", SizedQueue.new(1))
  43             Thread.abort_on_exception = true
  44             Thread.start do
  45               eval "require \"irb/ws-for-case-2\"", TOPLEVEL_BINDING, __FILE__, __LINE__
  46             end
  47             Thread.pass
  48           end
  49           @binding = BINDING_QUEUE.pop
  50
  51         when 3  # binging in function on TOPLEVEL_BINDING(default)
  52           @binding = eval("def irb_binding; binding; end; irb_binding",
  53                       TOPLEVEL_BINDING,
  54                       __FILE__,
  55                       __LINE__ - 3)
  56         end
  57       end
  58       if main.empty?
  59         @main = eval("self", @binding)
  60       else
  61         @main = main[0]
  62         IRB.conf[:__MAIN__] = @main
  63         case @main
  64         when Module
  65           @binding = eval("IRB.conf[:__MAIN__].module_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
  66         else
  67           begin
  68             @binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
  69           rescue TypeError
  70             IRB.fail CantChangeBinding, @main.inspect
  71           end
  72         end
  73       end
  74       eval("_=nil", @binding)
  75     end
  76
  77     attr_reader :binding
  78     attr_reader :main
  79
  80     def evaluate(context, statements, file = __FILE__, line = __LINE__)
  81       eval(statements, @binding, file, line)
  82     end
  83
  84     # error message manipulator
  85     def filter_backtrace(bt)
  86       case IRB.conf[:CONTEXT_MODE]
  87       when 0
  88         return nil if bt =~ /\(irb_local_binding\)/
  89       when 1
  90         if(bt =~ %r!/tmp/irb-binding! or
  91            bt =~ %r!irb/.*\.rb! or
  92            bt =~ /irb\.rb/)
  93           return nil
  94         end
  95       when 2
  96         return nil if bt =~ /irb\/.*\.rb/
  97       when 3
  98         return nil if bt =~ /irb\/.*\.rb/
  99         bt.sub!(/:\s*in `irb_binding'/){""}
 100       end
 101       bt
 102     end
 103
 104     def IRB.delete_caller
 105     end
 106   end
 107 end