[ruby/irb] Add "show_cmds" command to list all commands'

descriptions
(https://github.com/ruby/irb/pull/463)

https://github.com/ruby/irb/commit/7e857655ac

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/irb/cmd/subirb.rb b/lib/irb/cmd/subirb.rb
index 4d113c5bd7..43364f1393 100644
--- a/lib/irb/cmd/subirb.rb
+++ b/lib/irb/cmd/subirb.rb
@@ -30,24 +30,36 @@ module IRB
     end
 
     class IrbCommand < MultiIRBCommand
+      category "IRB"
+      description "Start a child IRB."
+
       def execute(*obj)
         IRB.irb(nil, *obj)
       end
     end
 
     class Jobs < MultiIRBCommand
+      category "IRB"
+      description "List of current sessions."
+
       def execute
         IRB.JobManager
       end
     end
 
     class Foreground < MultiIRBCommand
+      category "IRB"
+      description "Switches to the session of the given number."
+
       def execute(key)
         IRB.JobManager.switch(key)
       end
     end
 
     class Kill < MultiIRBCommand
+      category "IRB"
+      description "Kills the session with the given number."
+
       def execute(*keys)
         IRB.JobManager.kill(*keys)
       end