bin/rumai in rumai-3.2.1 vs bin/rumai in rumai-3.2.2

@@ -1,13 +1,50 @@
 #!/usr/bin/env ruby
 #
-# This program is an interactive shell for Rumai.
+# This is an interactive Ruby shell (IRB) for Rumai.
 #
-# Command-line options and arguments given to this program are passed
-# directly to the underlying IRB (the interactive Ruby shell) session.
 #
+# Usage:
+#
+#   rumai [Options] [STUFF_FOR_IRB]
+#
+#   STUFF_FOR_IRB : Arguments and options for `irb`.
+#
+#
+# Options:
+#
+#   -h, --help    : Show this message and exit.
+#
+#   -v, --version : Show version number and exit.
+#
 
+$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+require 'rumai'
+
+# parse command line
+if ARGV.delete('-h') or ARGV.delete('--help')
+  puts
+  puts Rumai.inspect
+  puts Rumai::TAGLINE
+  puts
+  puts
+  puts File.read(__FILE__)[/^#(\r?\n)(.*?)\1\1/m, 2].gsub(/^# ?/, '')
+  puts
+  puts
+  puts 'Read the user manual for more information:'
+  puts
+  puts "  #{Rumai::INSTDIR}/doc/index.html"
+  puts
+  puts "  #{Rumai::WEBSITE}"
+  puts
+  exit
+elsif ARGV.delete('-v') or ARGV.delete('--version')
+  puts Rumai::VERSION
+  exit
+end
+
+# start IRB session
 require 'irb'
 require 'irb/completion' # enable TAB-completion
 
 module IRB
   ##
@@ -26,11 +63,7 @@
     catch :IRB_EXIT do
       irb.eval_input
     end
   end
 end
-
-# start IRB session
-$LOAD_PATH << File.expand_path('../../lib', __FILE__)
-require 'rumai'
 
 IRB.start_session Rumai