Middleman + Guard + shopify_theme

Guardfile

require 'yaml'

guard :shell do
  watch(/source\/(.*)/) { |m| `bundle exec middleman build --clean` }

  watch(/build\/(.*)/) do |m|
    break if m[0] == 'build/config.yml'

    store = ''
    if File.exist?('build/config.yml')
      config = YAML.load_file('build/config.yml')
      store = config[:store]
    end

    file = Pathname.new(m[0])

    if file.exist?
      puts "shopify (#{store}): uploading #{m[1]}"
      `cd build && bundle exec theme upload #{m[1]}`
    else
      puts "shopify (#{store}): removing #{m[1]}"
      `cd build && bundle exec theme remove #{m[1]}`
    end
  end
end