defer loading of requires specified on the command line

bin/pry

@@ -46,7 +46,7 @@ See: `https://github.com/banister` for more information.
   end
 
   on :r, :require, "`require` a Ruby script at startup", true do |file|
-    require file
+    Pry.config.requires << file
   end
 
   on :I, "Add a path to the $LOAD_PATH", true do |path|

lib/pry/config.rb

@@ -71,6 +71,10 @@ class Pry
     # @return [Boolean]
     attr_accessor :should_load_plugins
 
+    # Determines whether to load files specified with the -r flag.
+    # @return [Boolean]
+    attr_accessor :should_load_requires
+
     # Config option for history.
     # sub-options include hist.file, hist.load, and hist.save
     # hist.file is the file to save/load history too, e.g
@@ -89,6 +93,9 @@ class Pry
     # @return [OpenStruct]
     attr_accessor :plugins
 
+    # @return [Array<String>] Ruby files to be required after loading any plugins.
+    attr_accessor :requires
+
     # @return [Integer] Amount of results that will be stored into out
     attr_accessor :memory_size
 

lib/pry/pry_class.rb

@@ -82,6 +82,13 @@ class Pry
     end
   end
 
+  # Load any Ruby files specified with the -r flag on the command line.
+  def self.load_requires
+    Pry.config.requires.each do |file|
+      require file
+    end
+  end
+
   # Start a Pry REPL.
   # This method also loads the files specified in `Pry::RC_FILES` the
   # first time it is invoked.
@@ -97,6 +104,7 @@ class Pry
       # multiple times per each new session (i.e in debugging)
       load_rc if Pry.config.should_load_rc
       load_plugins if Pry.config.plugins.enabled
+      load_requires if Pry.config.should_load_requires
       load_history if Pry.config.history.should_load
 
       @initial_session = false
@@ -195,6 +203,9 @@ class Pry
     config.plugins.enabled = true
     config.plugins.strict_loading = true
 
+    config.requires ||= []
+    config.should_load_requires = true
+
     config.history ||= OpenStruct.new
     config.history.should_save = true
     config.history.should_load = true