[ruby/irb] Transform ls's --grep/-G option to keyword args

(https://github.com/ruby/irb/pull/437)

* Transform ls's --grep/-G option to keyword args

* Make --grep less flexible

* Support -g instead of --grep

* Suppress warnings from symbol aliases

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/irb/cmd/ls.rb b/lib/irb/cmd/ls.rb
index f4a7348bd1..77cf071783 100644
--- a/lib/irb/cmd/ls.rb
+++ b/lib/irb/cmd/ls.rb
@@ -9,6 +9,15 @@ module IRB
 
   module ExtendCommand
     class Ls < Nop
+      def self.transform_args(args)
+        if match = args&.match(/\A(?<args>.+\s|)(-g|-G)\s+(?<grep>[^\s]+)\s*\n\z/)
+          args = match[:args]
+          "#{args}#{',' unless args.chomp.empty?} grep: /#{match[:grep]}/"
+        else
+          args
+        end
+      end
+
       def execute(*arg, grep: nil)
         o = Output.new(grep: grep)