added custom_completions.rb for customizable tab completions

lib/pry.rb

@@ -26,6 +26,7 @@ require "pry/print"
 require "pry/command_base"
 require "pry/commands"
 require "pry/prompts"
+require "pry/custom_completions"
 require "pry/completion"
 require "pry/core_extensions"
 require "pry/pry_class"

lib/pry/custom_completions.rb

@@ -0,0 +1,5 @@
+class Pry
+
+  # This proc will be instance_eval's against the active Pry instance
+  DEFAULT_CUSTOM_COMPLETIONS = proc { commands.commands.keys }
+end

lib/pry/prompts.rb

@@ -23,4 +23,9 @@ class Pry
 
   # A simple prompt - doesn't display target or nesting level
   SIMPLE_PROMPT = [proc { ">> " }, proc { ">* " }]
+
+  FILE_PROMPT = [
+                 proc { |target_self, _| "pry(#{Pry.view_clip(target_self)}:#{Dir.pwd}> " },
+                 proc { |target_self, _| "pry(#{Pry.view_clip(target_self)}:#{Dir.pwd}* " }
+                ]
 end

lib/pry/pry_class.rb

@@ -57,6 +57,8 @@ class Pry
     #     :after_session => proc { puts "goodbye" }
     attr_accessor :hooks
 
+    attr_accessor :custom_completions
+
     # Get the array of Procs to be used for the prompts by default by
     # all Pry instances.
     # @return [Array<Proc>] The array of Procs to be used for the
@@ -192,6 +194,7 @@ class Pry
     @prompt = DEFAULT_PROMPT
     @print = DEFAULT_PRINT
     @hooks = DEFAULT_HOOKS
+    @custom_completions = DEFAULT_CUSTOM_COMPLETIONS
     @color = true
     @should_load_rc = true
     @rc_loaded = false

lib/pry/pry_instance.rb

@@ -2,7 +2,7 @@ class Pry
 
   # The list of configuration options.
   CONFIG_OPTIONS = [:input, :output, :commands, :print,
-                   :prompt, :hooks]
+                   :prompt, :hooks, :custom_completions]
 
   attr_accessor *CONFIG_OPTIONS
 
@@ -93,7 +93,7 @@ class Pry
 
     return_value
   end
-  
+
   # Start a read-eval-print-loop.
   # If no parameter is given, default to top-level (main).
   # @param [Object, Binding] target The receiver of the Pry session
@@ -149,7 +149,7 @@ class Pry
 
     if input == Readline
       # Readline tab completion
-      Readline.completion_proc = Pry::InputCompleter.build_completion_proc(target, commands.commands.keys)
+      Readline.completion_proc = Pry::InputCompleter.build_completion_proc target, instance_eval(&custom_completions)
     end