1 files changed, 34 insertions, 0 deletions
diff --git a/lib/irb/cmd/measure.rb b/lib/irb/cmd/measure.rb
new file mode 100644
index 0000000000..6161d15bcb
--- /dev/null
+++ b/lib/irb/cmd/measure.rb
@@ -0,0 +1,34 @@
+require_relative "nop"
+
+# :stopdoc:
+module IRB
+  module ExtendCommand
+    class Measure < Nop
+      def initialize(*args)
+        super(*args)
+      end
+
+      def execute(type = nil, arg = nil)
+        case type
+        when :off
+          IRB.conf[:MEASURE] = nil
+          IRB.unset_measure_callback(arg)
+        when :list
+          IRB.conf[:MEASURE_CALLBACKS].each do |type_name, _|
+            puts "- #{type_name}"
+          end
+        when :on
+          IRB.conf[:MEASURE] = true
+          added = IRB.set_measure_callback(type)
+          puts "#{added.first} is added."
+        else
+          IRB.conf[:MEASURE] = true
+          added = IRB.set_measure_callback(type)
+          puts "#{added.first} is added."
+        end
+        nil
+      end
+    end
+  end
+end
+# :startdoc: