app_base::deploy

group :deployers do
  members node['app_base']['deployers']
end

directory "/deployment" do
  group :deployers
end

cookbook_file "/deployment/ssh_key.pem" do
  source "deploy_key"
  group :deployers
end

cookbook_file "/deployment/ssh_wrapper.sh" do
  source "ssh_wrapper"
  group :deployers
end

app_my_name::deploy

node.set['app_base']['deployers'] = node['app_base']['deployers'] + 'my_app_user'

deploy 'my_app'
  ssh_wrapper '/deployment/ssh_wrapper.sh'
  ...
end