bunch of random refactorings to different commands

lib/pry/code_object.rb

@@ -67,12 +67,12 @@ class Pry
 
     # lookup variables and constants that are not modules
     def default_lookup
-      if str !~ /\S#\S/ && target.eval("defined? #{str} ") =~ /variable|constant/
+      if variable_or_constant?(str)
         obj = target.eval(str)
 
         # restrict to only objects we KNOW for sure support the full API
         # Do NOT support just any object that responds to source_location
-        if [::Proc, ::Method, ::UnboundMethod].any? { |o| obj.is_a?(o) }
+        if sourcable_object?(obj)
           Pry::Method(obj)
         elsif !obj.is_a?(Module)
           Pry::WrappedModule(obj.class)
@@ -98,17 +98,39 @@ class Pry
         Pry::Method.from_str(str,target) || Pry::WrappedModule.from_str(str, target)
       end
 
-      sup = obj.super(super_level) if obj
-      if obj && !sup
+      lookup_super(obj, super_level)
+    end
+
+    private
+
+    def sourcable_object?(obj)
+      [::Proc, ::Method, ::UnboundMethod].any? { |o| obj.is_a?(o) }
+    end
+
+    # Whether `str` represents a variable (or constant) when looked up
+    # in the context of the `target` binding. This is used to
+    # distinguish it from methods or expressions.
+    # @param [String] str The string to lookup
+    def variable_or_constant?(str)
+      str !~ /\S#\S/ && target.eval("defined? #{str} ") =~ /variable|constant/
+    end
+
+    def target_self
+      target.eval('self')
+    end
+
+    # grab the nth (`super_level`) super of `obj
+    # @param [Object] obj
+    # @param [Fixnum] super_level How far up the super chain to ascend.
+    def lookup_super(obj, super_level)
+      return nil if !obj
+
+      sup = obj.super(super_level)
+      if !sup
         raise Pry::CommandError, "No superclass found for #{obj.wrapped}"
       else
         sup
       end
     end
-
-    private
-    def target_self
-      target.eval('self')
-    end
   end
 end

lib/pry/commands/edit/method_patcher.rb

@@ -1,36 +1,37 @@
+require 'forwardable'
+
 class Pry
   class Command::Edit
     class MethodPatcher
-      attr_accessor :method_object
-      attr_accessor :target
-      attr_accessor :_pry_
+      extend Forwardable
+
+      def_delegators :@edit_context, :code_object, :target, :_pry_
 
       def initialize(edit_context)
-        @method_object = edit_context.code_object
-        @target        = edit_context.target
-        @_pry_         = edit_context._pry_
+        @edit_context = edit_context
       end
 
       # perform the patch
       def perform_patch
-        source = wrap_for_nesting(wrap_for_owner(Pry::Editor.edit_tempfile_with_content(adjusted_lines)))
-
-        if method_object.alias?
+        if code_object.alias?
           with_method_transaction do
-            _pry_.evaluate_ruby source
-            Pry.binding_for(method_object.owner).eval("alias #{method_object.name} #{method_object.original_name}")
+            _pry_.evaluate_ruby patched_code
           end
         else
-          _pry_.evaluate_ruby source
+          _pry_.evaluate_ruby patched_code
         end
       end
 
       private
 
+      def patched_code
+        @patched_code ||= wrap(Pry::Editor.edit_tempfile_with_content(adjusted_lines))
+      end
+
       # The method code adjusted so that the first line is rewritten
       # so that def self.foo --> def foo
       def adjusted_lines
-        lines = method_object.source.lines.to_a
+        lines = code_object.source.lines.to_a
         lines[0] = definition_line_for_owner(lines.first)
         lines
       end
@@ -45,12 +46,13 @@ class Pry
       # @param [String] meth_name  The method name before aliasing
       # @param [Module] target  The owner of the method
       def with_method_transaction
-        target = Pry.binding_for(method_object.owner)
-        temp_name = "__pry_#{method_object.original_name}__"
+        target = owner_binding
+        temp_name = "__pry_#{code_object.original_name}__"
 
-        target.eval("alias #{temp_name} #{method_object.original_name}")
+        target.eval("alias #{temp_name} #{code_object.original_name}")
         yield
-        target.eval("alias #{method_object.original_name} #{temp_name}")
+        target.eval("alias #{code_object.name} #{code_object.original_name}")
+        target.eval("alias #{code_object.original_name} #{temp_name}")
       ensure
         target.eval("undef #{temp_name}") rescue nil
       end
@@ -68,13 +70,26 @@ class Pry
       # @param String   The original definition line. e.g. def self.foo(bar, baz=1)
       # @return String  The new definition line. e.g. def foo(bar, baz=1)
       def definition_line_for_owner(line)
-        if line =~ /^def (?:.*?\.)?#{Regexp.escape(method_object.original_name)}(?=[\(\s;]|$)/
-          "def #{method_object.original_name}#{$'}"
+        if line =~ /^def (?:.*?\.)?#{Regexp.escape(code_object.original_name)}(?=[\(\s;]|$)/
+          "def #{code_object.original_name}#{$'}"
         else
-          raise CommandError, "Could not find original `def #{method_object.original_name}` line to patch."
+          raise CommandError, "Could not find original `def #{code_object.original_name}` line to patch."
         end
       end
 
+      # Provide a binding for the `code_object`'s owner context.
+      # @return [Binding]
+      def owner_binding
+        Pry.binding_for(code_object.owner)
+      end
+
+      # Apply wrap_for_owner and wrap_for_nesting successively to `source`
+      # @param [String] source
+      # @return [String] The wrapped source.
+      def wrap(source)
+        wrap_for_nesting(wrap_for_owner(source))
+      end
+
       # Update the source code so that when it has the right owner when eval'd.
       #
       # This (combined with definition_line_for_owner) is backup for the case that
@@ -84,7 +99,7 @@ class Pry
       # @param [String] source  The source to wrap
       # @return [String]
       def wrap_for_owner(source)
-        Thread.current[:__pry_owner__] = method_object.owner
+        Thread.current[:__pry_owner__] = code_object.owner
         source = "Thread.current[:__pry_owner__].class_eval do\n#{source}\nend"
       end
 
@@ -101,7 +116,7 @@ class Pry
       # @param [String] source  The source to wrap.
       # @return [String]
       def wrap_for_nesting(source)
-        nesting = Pry::Code.from_file(method_object.source_file).nesting_at(method_object.source_line)
+        nesting = Pry::Code.from_file(code_object.source_file).nesting_at(code_object.source_line)
 
         (nesting + [source] + nesting.map{ "end" } + [""]).join("\n")
       rescue Pry::Indent::UnparseableNestingError => e

lib/pry/commands/whereami.rb

@@ -44,19 +44,11 @@ class Pry
       "#{@file} @ line #{@line} #{@method && @method.name_with_owner}"
     end
 
-    def nothing_to_do?
-      opts.quiet? && (internal_binding?(target) || !code?)
-    end
-
     def process
       if nothing_to_do?
         return
       elsif internal_binding?(target)
-        if target_self == TOPLEVEL_BINDING.eval("self")
-          output.puts "At the top level."
-        else
-          output.puts "Inside #{Pry.view_clip(target_self)}."
-        end
+        handle_internal_binding
         return
       end
 
@@ -69,6 +61,22 @@ class Pry
 
     private
 
+    def nothing_to_do?
+      opts.quiet? && (internal_binding?(target) || !code?)
+    end
+
+    def top_level?
+      target_self == TOPLEVEL_BINDING.eval("self")
+    end
+
+    def handle_internal_binding
+      if top_level?
+        output.puts "At the top level."
+      else
+        output.puts "Inside #{Pry.view_clip(target_self)}."
+      end
+    end
+
     def show_method?
       args.empty? && @method && @method.source? && @method.source_range.count < 20 &&
       # These checks are needed in case of an eval with a binding and file/line

lib/pry/commands/wtf.rb

@@ -32,10 +32,16 @@ class Pry
       if opts.verbose?
         output.puts Pry::Code.new(_pry_.last_exception.backtrace, 0, :text).with_line_numbers.to_s
       else
-        output.puts Pry::Code.new(_pry_.last_exception.backtrace.first([captures[0].size, 0.5].max * 10), 0, :text).with_line_numbers.to_s
+        output.puts Pry::Code.new(_pry_.last_exception.backtrace.first(size_of_backtrace), 0, :text).with_line_numbers.to_s
       end
     end
-  end
 
-  Pry::Commands.add_command(Pry::Command::Wtf)
+    private
+
+    def size_of_backtrace
+      [captures[0].size, 0.5].max * 10
+  end
+end
+
+Pry::Commands.add_command(Pry::Command::Wtf)
 end