Automatic input in Ruby script?

Question

Im running this command from ruby script:

system "trad install"

This will prompt me three times for choosing y/n.

Is there a way to automatically choose y,y,n?

Answer 1

well, you might want to use

pipe = IO.popen("trad install")
pipe.write "yyn"

Not sure if that works, however.

Answer 2

I don't think you can do that. If trad is your application, the best way is to add options to it.

Answer 3

You can probably automate a run with Session and Ruby's built-in pty/expect (which seems to have no online documentation). (Dave Thomas has a few brief examples of expect and pty in recent editions of Programming Ruby, if you have a copy of that.)

However, I agree with Dmitry: it's almost certainly easier to adjust trad if possible.

Answer 4

echo -e "Y\nN\nN\n" | trad install