Super simple script to copy Github tag labels from one repository to another. Uses the Octokit gem.

copy_github_labels.rb

require 'octokit'

# https://help.github.com/articles/creating-an-access-token-for-command-line-use/
client = Octokit::Client.new(:access_token => "getmefromgithub")

COPY_FROM_REPO = "repo/old"
COPY_TO_REPO = "repo/new"

current_labels = client.labels(COPY_FROM_REPO)

current_labels.each do |label|
  begin
    client.add_label(COPY_TO_REPO, label.name, label.color)
    puts "Added #{label.name} - ##{label.color}"
  rescue Exception => e
    puts "#{label.name} already exists" if e.class == Octokit::UnprocessableEntity
  end
end

I used this one instead: https://gist.github.com/douglascayers/9fbc6f2ad899f12030c31f428f912b5c