bitbake: toaster: Added validation to stop import if there is a build in progress

Added validation to prevent simultaneous imports from running because the database fails at runtime.
The option to create a queue was taken into consideration. However, it will require the use of Celery https://pypi.org/project/celery/ or Background Task https://pypi.org/project/django-background-tasks/ which require the use of external services and multiple dependencies.
If required we could explore the alternative in the future.

(Bitbake rev: eb417e27be5717a259f27e98dbd73255b1a42fc9)

Signed-off-by: Marlon Rodriguez Garcia <marlon.rodriguez-garcia@savoirfairelinux.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/templates/command_line_builds.html

@@ -152,7 +152,11 @@ function _ajax_update(file, all, dir){
         type: "POST",
         data: {file: file, all: all, dir: dir},
         success:function(data){
-            window.location = '/toastergui/builds/'
+            if (data['response']=='building'){
+                location.reload()
+            } else {
+                window.location = '/toastergui/builds/'
+            }
         },
         complete:function(data){
         },

bitbake/lib/toaster/toastergui/views.py

@@ -2018,6 +2018,14 @@ class CommandLineBuilds(TemplateView):
         logs_dir = request.POST.get('dir')
         all_files =  request.POST.get('all')
 
+        # check if a build is already in progress
+        if Build.objects.filter(outcome=Build.IN_PROGRESS):
+            messages.add_message(
+                self.request,
+                messages.ERROR,
+                "A build is already in progress. Please wait for it to complete before starting a new build."
+            )
+            return JsonResponse({'response': 'building'})
         imported_files = EventLogsImports.objects.all()
         try:
             if all_files == 'true':