module Middleman::CoreExtensions::FileWatcher::InstanceMethods

def file_changed(*args, &block)
  self.class.file_changed(*args, &block)
end

def file_deleted(*args)
  self.class.file_deleted(*args)
end

def file_did_change(path)
  file_changed.each do |callback, matcher|
    next if path.match(%r{^#{build_dir}/})
    next if !matcher.nil? && !path.match(matcher)
    instance_exec(path, &callback)
  end
end

def file_did_delete(path)
  file_deleted.each do |callback, matcher|
    next if path.match(%r{^#{build_dir}/})
    next unless matcher.nil? || path.match(matcher)
    instance_exec(path, &callback)
  end
end