template override between cookbooks

foo.rb

template "/tmp/foo.rb"
  source "foo.rb.erb"
  cookbook "banana"
end

nginx-recipes-commons.rb

template "/tmp/foo.rb"
  source "foo.rb.erb"
  cookbook "banana"
end

template "#{node['nginx']['dir']}/sites-available/default" do
  source "default-site.erb"
  owner "root"
  group "root"
  mode 0644
end

other_shit.rb

include_recipe "whatever_cookbook::foo"

begin
  t = resources(:template => "/tmp/foo.rb")
  t.source "bonkers.rb.erb"
  t.cookbook "definitely_not_banana"
rescue Chef::Exceptions::ResourceNotFound
  Chef::Log.warn "could not find template /tmp/foo.rb to modify"
end

project-recipes-default.rb

include_recipe "nginx"

begin
  t = resources("template[#{node['nginx']['dir']}/sites-available/default]")
  t.source "/home/vagrant/myapp/cookbooks/project/templates/default-site.erb"
  t.cookbook "project"
rescue Chef::Exceptions::ResourceNotFound
  Chef::Log.warn "could not find template your template override!"
end