examples/ask_valid.rb
# frozen_string_literal: true
require_relative "../lib/tty-prompt"
prompt = TTY::Prompt.new
prompt.ask("Folder name?") do |q|
q.required(true)
q.validate ->(v) { return !Dir.exist?(v) }
q.messages[:valid?] = "Folder already exists?"
q.messages[:required?] = "Folder name must not be empty"
end