gists.rb

# gem install httparty
# ruby gists.rb

require 'httparty'

class Gists
  include HTTParty

  @username = 'x'
  @password = 'x'

  base_uri 'https://api.github.com'
  basic_auth @username, @password

  def self.delete_private_gists
    gists = get("/users/#{@username}/gists")
    # gists = get("/users/#{@username}/gists?page=2") # ETOOLAZYFORPAGINATION
    gists = gists.select { |g| g["public"] == false }

    if gists.empty?
      false
    else
      gists.each do |gist|
        id = gist["id"]
        puts "deleting #{id}"
        delete "/gists/#{id}"
      end
    end
  end
end

loop do
  break if Gists.delete_private_gists == false
end