Working version of the https://gist.github.com/redroot/acf3b8235ba8cb99ae2b

working.rb

namespace :update do
  task :services do
    REPOS.each do |repo_path|

      uncommitted_files = `cd #{repo_path} && git status --porcelain | wc -l`.strip.chomp.to_i

      if uncommitted_files == 0
        puts "Updating #{repo_path} ..."

        puts `cd #{repo_path} && BUNDLE_GEMFILE=#{repo_path}/Gemfile bundle update config-gem`
        puts `cd #{repo_path} && git commit -a -m "Updated config-gem"`
        puts `cd #{repo_path} && git pull --rebase && git push`

      else
        puts "#{repo_path} has uncommitted files, skipping ..."
      end

    end
  end
end