An example SSH-key-adding class for Github

add-key.rb

require 'rubygems'
require 'httparty'
require 'io/console'

class GithubApi
  include HTTParty
  base_uri 'https://api.github.com'

  def initialize(username, password)
    @auth = {:username => username, :password => password}
    self.class.headers({"Authorization" => "token #{token}"})
  end

  def token
    if @token
      @token
    else
      auth = authorizations.find {|a| a['app']['name'] =~ /umts-smeagol/} ||
        self.class.post("/authorizations", :basic_auth => @auth, :body => auth_template).parsed_response

      @token = auth['token']
    end
  end

  def authorizations
    auth = self.class.get("/authorizations", :basic_auth => @auth)
    if auth.response.class == Net::HTTPOK
      return auth
    else
      raise ResponseError, auth.response
    end
  end

  def auth_template
    {"note"=>"umts-smeagol",
     "note_url"=>"https://github.com/umts/smeagol",
     "scopes"=>["user"]}.to_json
  end

  def add_key(public_key)
    response = self.class.post("/user/keys",
                    :body => { "title" => "testing", "key" => public_key }.to_json)

    return response.code == 201
  end
end

user = 'werebus'
print "Enter password for #{user}: "
passwd = STDIN.noecho(&:gets).chomp
gh = GithubApi.new(user, passwd)

keyfile = File.open(File.join(ENV['HOME'], ".ssh", "id_rsa.pub"))
puts "No go" unless gh.add_key(keyfile.read)
keyfile.close