Ruby script to update all your forked repositories

fork_updater.rb

#!/usr/bin/env ruby

require 'octokit'
require 'logger'

@logger = Logger.new("output.log")

def update_fork(repo)
  repo_name = repo.name
  # clone the repository -- octokit doesn't provide this feature as it's a github api library
  @logger.info("cloning into #{repo.ssh_url}")
  system("git clone #{repo.ssh_url} #{repo_name}")
  # setup upstream for updating
  @logger.info("setup upstream to #{repo.parent.ssh_url}")
  system("cd #{repo_name} && git remote add upstream #{repo.parent.ssh_url}")
  # do the update
  @logger.info("doing the update with push")
  system("cd #{repo_name} && git fetch upstream && git rebase upstream/master && git push origin")
ensure
  # ensure that the folder is cleaned up
  @logger.info("cleanup: removing the repository folder")
  system("rm -fr #{repo_name}")
end

client = Octokit::Client.new(:access_token => ENV['GIT_TOKEN'], per_page: 100)
repos = client.repos({}, query: {type: 'owner', sort: 'asc'})

# Go through all the pages and add them to the list of repositories.
repos.concat(client.last_response.rels[:next].get.data)

repos = repos.select{ |r| r.fork }

@logger.info("going to update '#{repos.length}' repositories")

repos.each do |repo|
  # get the repositories information
  @logger.info("updating #{repo.name}")
  r = client.repository(repo.id)
  update_fork(r)
end