make show-source code more readable

lib/pry/commands/show_source.rb

@@ -37,21 +37,29 @@ class Pry
     end
 
     def process
-      obj_name = args.empty? ? nil : args.join(" ")
-      o = Pry::CodeObject.lookup(obj_name, target, _pry_, :super => opts[:super])
-      raise Pry::CommandError, "Couldn't locate #{obj_name}!" if !o
+      code_object = Pry::CodeObject.lookup(obj_name, target, _pry_, :super => opts[:super])
 
-      if opts[:a]
-        result = all_modules(o)
+      if !code_object
+        raise Pry::CommandError, "Couldn't locate #{obj_name}!"
+      end
+
+      if code_object.is_a?(Pry::WrappedModule) && opts.present?(:all)
+        # show all monkey patches for a module
+        result = source_for_all_module_candidates(code_object)
       else
-        result = header(o)
-        result << Code.new(o.source, start_line_for(o)).
+        # show the source for a specific code object
+        result = header(code_object)
+        result << Code.new(code_object.source, start_line_for(code_object)).
           with_line_numbers(use_line_numbers?).to_s
       end
 
       stagger_output result
     end
 
+    def obj_name
+      @obj_name ||= args.empty? ? nil : args.join(" ")
+    end
+
     # we need this helper as some Pry::Method objects can wrap Procs
     # @return [Boolean]
     def real_method_object?(code_object)
@@ -76,7 +84,7 @@ class Pry
       h << "\n#{Pry::Helpers::Text.bold('Number of lines:')} #{code_object.source.lines.count}\n\n"
     end
 
-    def all_modules(mod)
+    def source_for_all_module_candidates(mod)
       result = "Found #{mod.number_of_candidates} candidates for `#{mod.name}` definition:\n"
       mod.number_of_candidates.times do |v|
         candidate = mod.candidate(v)

spec/commands/show_source_spec.rb

@@ -435,6 +435,17 @@ if !PryTestHelpers.mri18_and_no_real_source_location?
           result.should =~ /def class_eval_method/
         end
 
+        it 'should ignore -a when object is not a module' do
+          TestClassForShowSourceClassEval.class_eval do
+            def class_eval_method
+              :bing
+            end
+          end
+
+          result = pry_eval('show-source TestClassForShowSourceClassEval#class_eval_method -a')
+          result.should =~ /bing/
+        end
+
         it 'should show the source for an instance_eval-based monkeypatch' do
           TestClassForShowSourceInstanceEval.instance_eval do
             def instance_eval_method