gistfile1.txt

/Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/1.0.rb:44:in `block in to_feed': required variables of maker.channel are not set: about (RSS::NotSetError)
  from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:231:in `_set_default_values'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:368:in `_set_default_values'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:393:in `_set_default_values'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:224:in `set_default_values'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/1.0.rb:31:in `to_feed'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:414:in `setup_channel'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/1.0.rb:21:in `setup_elements'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:445:in `to_feed'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:439:in `make'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker/base.rb:402:in `make'
	from /Users/zzak/.rubies/ruby-trunk/lib/ruby/2.1.0/rss/maker.rb:28:in `make'
	from rss1.0.rb:3:in `<main>'

rss1.0.rb

require "rss"

rss = RSS::Maker.make("1.0") do |maker|
  maker.channel.language = "en"
  maker.channel.author = "matz"
  maker.channel.updated = Time.now.to_s
  maker.channel.link = "http://www.ruby-lang.org/en/feeds/news.rss"
  maker.channel.title = "Example Feed"
  maker.channel.description = "A longer description of my feed."
  maker.items.new_item do |item|
    item.link = "http://www.ruby-lang.org/en/news/2010/12/25/ruby-1-9-2-p136-is-released/"
    item.title = "Ruby 1.9.2-p136 is released"
    item.updated = Time.now.to_s
  end
end

puts rss