Ruby Script for appending pdfs with Prawn

script.rb

#!/usr/bin/ruby

require 'json'
require 'prawn'

raw = File.open("data.json")
json = JSON.parse(raw.read)

Prawn::Document.generate("result.pdf", {:page_size => 'A4', :skip_page_creation => true}) do |pdf|
	json["teams"].each do |team|
	    if File.exists?(team["file"])
	    	nb_pages = Prawn::Document.new(:template => team["file"]).page_count
	    	puts "Appending " + team["file"] + "..." 
	    	(1..nb_pages).each do |i|
	    		puts "Page " + i + " / " + nb_pages
			  	pdf.start_new_page(:template => team["file"], :template_page => i)
			end
		end
	end
end