Sake task to copy your DSA SSH pubkey to a remote host's authorized_keys

ssh-keys.sake.rb

desc 'Copy ssh-key to authorized_keys on $HOST for $USER'
task 'ssh:keys' do
  host = (ENV["HOST"]
  user = (ENV["USER"]
  if (host and user) then
    sh("ssh #{user}@#{host} 'mkdir -p .ssh/'")
    sh("cat .ssh/id_dsa.pub | ssh #{user}@#{host} 'cat >> .ssh/authorized_keys'")
  end
end

# Example usage:
# sake ssh:keys HOST=mywebsite.com USER=deploy