[chef] Modifying LWRP call in library cookbook

[James Wilford < >]

Hi,

I'm using the application_ruby cookbook to deploy a rails app. I'm
trying to get zero-downtime restarts working Unicorn and I found a
guide at https://gist.github.com/czarneckid/4639793 which seems to
work, but I need to use a custom runit template.

When I call the application provider in my wrapper cookbook, this
creates a runit service:

My wrapper:

name = 'myapp'

application name do
 (snip)

  unicorn do
    restart_command do
      execute "/etc/init.d/#{name} restart" do
        user "root"
      end
    end
    worker_processes 2
    listen ({ "#{app_path}/shared/.unicorn.sock" => { :tcp_nodelay =>
true, :backlog => 100 }})
    pid    "#{app_path}/shared/pids/unicorn.pid"
    stderr_path "#{app_path}/shared/log/unicorn.stderr.log"
    stdout_path "#{app_path}/shared/log/unicorn.stdout.log"
    before_exec "ENV['BUNDLE_GEMFILE'] = \"#{app_path}/current/Gemfile\""
    before_fork before_fork
    after_fork  after_fork
  end
end

https://github.com/opscode-cookbooks/application_ruby/blob/master/providers/unicorn.rb:

  runit_service new_resource.name do
    run_template_name 'unicorn'
    log_template_name 'unicorn'
    owner new_resource.owner if new_resource.owner
    group new_resource.group if new_resource.group

    cookbook 'application_ruby'
    options(
      :app => new_resource,
      :bundler => new_resource.bundler,
      :bundle_command => new_resource.bundle_command,
      :rails_env => new_resource.environment_name,
      :smells_like_rack =>
::File.exists?(::File.join(new_resource.path, "current", "config.ru"))
    )
  end

I'd like to change the 'cookbook' line there to use my own cookbook,
so I can write a custom template. I tried changing the template
resource for the runit file:

srv = resources("template[/etc/sv/myapp/run]")
srv.cookbook = 'my_cookbook'

but I get "Cannot find a resource matching template[/etc/sv/myapp/run]
(did you define it first?)"

Is it possible to do this or do I need to fork the application_ruby cookbook?

Thanks

James