bitbake: toaster: add 'nobuild' option to Toaster

Add a 'nobuild' option for starting Toaster without the project
and hosted builds support. This allows a Toaster host to provide
local build statistics without opening the host to external users
building projects.

[YOCTO #12315]

(Bitbake rev: 2d14d6004b6add5ce07295fff1144ade2e54e1c9)

Signed-off-by: David Reyna <David.Reyna@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/widgets.py

@@ -41,6 +41,7 @@ import types
 import json
 import collections
 import re
+import os
 
 from toastergui.tablefilter import TableFilterMap
 
@@ -86,6 +87,9 @@ class ToasterTable(TemplateView):
         context['table_name'] = type(self).__name__.lower()
         context['empty_state'] = self.empty_state
 
+        # global variables
+        context['project_enable'] = ('1' == os.environ.get('TOASTER_BUILDSERVER'))
+
         return context
 
     def get(self, request, *args, **kwargs):