Add completion info to irb_info

Author: tompng

lib/irb/cmd/irb_info.rb

@@ -14,6 +14,7 @@ def execute
         str  = "Ruby version: #{RUBY_VERSION}\n"
         str += "IRB version: #{IRB.version}\n"
         str += "InputMethod: #{IRB.CurrentContext.io.inspect}\n"
+        str += "Completion: #{IRB.CurrentContext.io.respond_to?(:completion_info) ? IRB.CurrentContext.io.completion_info : 'off'}\n"
         str += ".irbrc path: #{IRB.rc_file}\n" if File.exist?(IRB.rc_file)
         str += "RUBY_PLATFORM: #{RUBY_PLATFORM}\n"
         str += "LANG env: #{ENV["LANG"]}\n" if ENV["LANG"] && !ENV["LANG"].empty?

lib/irb/completion.rb

@@ -94,6 +94,10 @@ def eval_class_constants
       end
     }
 
+    def inspect
+      'RegexpCompletor'
+    end
+
     # Set of reserved words used by Ruby, you should not use these for
     # constants or variables
     ReservedWords = %w[

lib/irb/input-method.rb

@@ -193,6 +193,10 @@ def initialize
       }
     end
 
+    def completion_info
+      'RegexpCompletor'
+    end
+
     # Reads the next line from this input method.
     #
     # See IO#gets for more information.
@@ -270,6 +274,11 @@ def initialize(completor)
       end
     end
 
+    def completion_info
+      autocomplete_message = IRB.conf[:USE_AUTOCOMPLETE] ? 'Autocomplete' : 'Tab Complete'
+      "#{autocomplete_message}, #{@completor.inspect}"
+    end
+
     def check_termination(&block)
       @check_termination_proc = block
     end

test/irb/test_cmd.rb

@@ -90,6 +90,7 @@ def test_irb_info_multiline
         Ruby\sversion:\s.+\n
         IRB\sversion:\sirb\s.+\n
         InputMethod:\sAbstract\sInputMethod\n
+        Completion: .+\n
         \.irbrc\spath:\s.+\n
         RUBY_PLATFORM:\s.+\n
         East\sAsian\sAmbiguous\sWidth:\s\d\n
@@ -113,6 +114,7 @@ def test_irb_info_singleline
         Ruby\sversion:\s.+\n
         IRB\sversion:\sirb\s.+\n
         InputMethod:\sAbstract\sInputMethod\n
+        Completion: .+\n
         \.irbrc\spath:\s.+\n
         RUBY_PLATFORM:\s.+\n
         East\sAsian\sAmbiguous\sWidth:\s\d\n
@@ -139,6 +141,7 @@ def test_irb_info_multiline_without_rc_files
         Ruby\sversion:\s.+\n
         IRB\sversion:\sirb\s.+\n
         InputMethod:\sAbstract\sInputMethod\n
+        Completion: .+\n
         RUBY_PLATFORM:\s.+\n
         East\sAsian\sAmbiguous\sWidth:\s\d\n
         #{@is_win ? 'Code\spage:\s\d+\n' : ''}
@@ -168,6 +171,7 @@ def test_irb_info_singleline_without_rc_files
         Ruby\sversion:\s.+\n
         IRB\sversion:\sirb\s.+\n
         InputMethod:\sAbstract\sInputMethod\n
+        Completion: .+\n
         RUBY_PLATFORM:\s.+\n
         East\sAsian\sAmbiguous\sWidth:\s\d\n
         #{@is_win ? 'Code\spage:\s\d+\n' : ''}
@@ -196,6 +200,7 @@ def test_irb_info_lang
         Ruby\sversion: .+\n
         IRB\sversion:\sirb .+\n
         InputMethod:\sAbstract\sInputMethod\n
+        Completion: .+\n
         \.irbrc\spath: .+\n
         RUBY_PLATFORM: .+\n
         LANG\senv:\sja_JP\.UTF-8\n