fastly-list-domains.rb

#!/usr/bin/env ruby

require 'fastly'

service_id = 'deadbeefdeadbeef'

fastly = Fastly.new(:api_key => 'deadbeefdeadbeefdeadbeef')
service = fastly.get_service(service_id)
latest_version = service.version

existing_domains = Array.new
domain_lister = Fastly::Client.new(:api_key => 'deadbeefdeadbeef')
domain_lister.get(Fastly::Domain.list_path(:service_id => service.id, :version => latest_version.number)).each do |domain|
   existing_domains.push domain['name']
end
existing_domains.each do |domain|
    puts "Existing domain: #{domain}"
end