A lo-tech gem auto-updated script

gem_update.rb

# Important: please make sure to still carefully read each gem changelog!

require 'yaml'

def system!(cmd)
  raise "Cannot run command!!!" unless system(cmd)
end

gems = YAML.load(IO.read('outdated.yml')).fetch('gems')
gems.each do |gem|
  puts "Auto-update #{gem}"
  system!("bundle update #{gem}")
  puts "Testing for #{gem}"
  if system("git diff --exit-code Gemfile.lock")
    puts "Nothing to update"
  else
    if system("bundle exec rspec")
      puts "Tests successful - committing upgrade for #{gem}"
      system!("git add Gemfile.lock")
      system!("git commit -m \"Update #{gem}\"")
    else
      puts "Tests failed!"
      system!("git checkout Gemfile.lock")
    end
  end
end

outdated.yml

# fill this with bundle outdated or similar
gems:
  - httparty
  - recurly
  - awesome_print