Rakefile in cosmosc2-demo-5.0.4 vs Rakefile in cosmosc2-demo-5.0.5

@@ -18,18 +18,25 @@
 # copyright holder
 
 PLUGIN_NAME = Dir['*.gemspec'][0].split('.')[0..-2].join('.')
 
 task :require_version do
-  unless ENV['VERSION']
+  if ENV['VERSION']
+    if ENV['VERSION'] =~ /-/
+      # Add Timestamp to prerelease versions
+      ENV['VERSION'] = ENV['VERSION'] + "." + Time.now.utc.strftime("%Y%m%d%H%M%S")
+    end
+  else
     puts "VERSION is required: rake <task> VERSION=X.X.X"
     exit 1
   end
 end
 
 task :build => [:require_version] do
   _, platform, *_ = RUBY_PLATFORM.split("-")
   if platform == 'mswin32' or platform == 'mingw32'
     puts "Warning: Building gem on Windows will lose file permissions"
   end
+  # Build the widgets in the src directory
+  system("yarn run build")
   system("gem build #{PLUGIN_NAME}")
 end