This code was used by Code Climate to figure out where classes, modules and methods live

code_locator.rb

    def in_module(name, file, line, last_line)
      if Sexp === name then
        name = case name.first
               when :colon2 then
                 name = name.flatten
                 name.delete :const
                 name.delete :colon2
                 name.join("::")
               when :colon3 then
                 name.last.to_s
               else
                 raise "unknown type #{name.inspect}"
               end
      end

      @constant_stack.unshift name
      line_location = LineLocation.new(file, line..last_line)

      unless @module_line_counts_stack.empty?
        old_line_count = @module_line_counts_stack.first.last
        @module_line_counts_stack.first[1] = old_line_count - line_location.line_count
      end

      @module_line_counts_stack.unshift([klass_name, line_location.line_count])
      yield
      module_name, exclusive_line_count = @module_line_counts_stack.shift
      @constant_stack.shift


      if !@class_locations[module_name] || (@class_locations[module_name].line_count < exclusive_line_count)
        @class_locations[module_name] = line_location
      end
    end

    def in_klass name, file, line, last_line
      if Sexp === name then
        name = case name.first
               when :colon2 then
                 name = name.flatten
                 name.delete :const
                 name.delete :colon2
                 name.join("::")
               when :colon3 then
                 name.last.to_s
               else
                 raise "unknown type #{name.inspect}"
               end
      end

      @constant_stack.unshift name

      line_location = LineLocation.new(file, line..last_line)
      if !@class_locations[klass_name] || (@class_locations[klass_name].line_count < line_location.line_count)
        @class_locations[klass_name] = line_location
      end

      unless @module_line_counts_stack.empty?
        old_line_count = @module_line_counts_stack.first.last
        @module_line_counts_stack.first[1] = old_line_count - line_location.line_count
      end

      yield
      @constant_stack.shift
    end

    def in_method(name, file, line, last_line)
      @method_stack.unshift name.to_s

      line_location = LineLocation.new(file, line..last_line)
      if !@method_locations[signature] || (@method_locations[signature].line_count < line_location.line_count)
        @method_locations[signature] = line_location
      end

      yield
      @method_stack.shift
    end