Improve rails:template undefined LOCATION variable error message fixed

railties/lib/rails/tasks/framework.rake

@@ -2,9 +2,10 @@ namespace :rails do
   desc "Update configs and some other initially generated files (or use just update:configs, update:scripts, or update:application_controller)"
   task :update => [ "update:configs", "update:scripts", "update:application_controller" ]
 
-  desc "Applies the template supplied by LOCATION=/path/to/template"
+  desc "Applies the template supplied by LOCATION=(/path/to/template) or URL"
   task :template do
     template = ENV["LOCATION"]
+    raise "No LOCATION value given. Please set LOCATION either as path to a file or a URL" if template.blank?
     template = File.expand_path(template) if template !~ %r{\A[A-Za-z][A-Za-z0-9+\-\.]*://}
 
     require 'rails/generators'