lib/rubocop/extension/generator/cli.rb in rubocop-extension-generator-0.2.2 vs lib/rubocop/extension/generator/cli.rb in rubocop-extension-generator-0.2.3

@@ -2,10 +2,12 @@
   module Extension
     module Generator
       class CLI
         BANNER = <<~TEXT
           Usage: rubocop-extension-generator NAME
+
+          The NAME must start with rubocop-, like rubocop-rspec.
         TEXT
 
         def self.run(argv)
           new(argv).run
         end
@@ -15,15 +17,22 @@
         end
 
         def run
           # For --help
           opt = OptionParser.new(BANNER)
+          opt.version = VERSION
           args = opt.parse(@argv)
 
           name = args.first
-          raise "It must be named `rubocop-*`. For example: rubocop-rspec" unless name.match?(/\Arubocop-\w+\z/)
+          fail!(opt) unless name
+          fail!(opt) unless name.match?(/\Arubocop-\w+\z/)
 
           Generator.new(name).generate
+        end
+
+        private def fail!(opt)
+          puts opt.help
+          exit 1
         end
       end
     end
   end
 end