DialogBind is a library wrapping around message box displaying tools (zenity and xmessage) on Linux, macOS and Windows written in Ruby.
A simple example
require 'dialogbind' if ('Would you like me to show you a random number?', 'Message') == false then ('You have selected no.') else (rand(20).to_s, 'Your random number') end
This tiny program in Ruby will show a question dialog with yes and no buttons, with title "Message" and text "Would you like me to show you a random number?". That dialog will return either true if yes was clicked, otherwise, it returns false. If false is returned, an error with text "You have selected no." pops up. Otherwise, a random number from 0 to 19 is generated and is displayed in an information message box with title "Your random number".
sudo gem install dialogbind
And then include it in your Ruby code the following way:
That's it! You can use it from your code, but it will only work on Linux, macOS, Windows and FreeBSD. Other platforms are not supported right now.
Docs are available on RubyDoc: http://www.rubydoc.info/gems/dialogbind/