[PATCH] 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 wi=
ll require the use of Celery https://pypi.org/project/celery/ or Backgrou=
nd Task https://pypi.org/project/django-background-tasks/ which require t=
he use of external services and multiple dependencies.
If required we could explore the alternative in the future.

Signed-off-by: Marlon Rodriguez Garcia <marlon.rodriguez-garcia@savoirfai=
relinux.com>
---
 lib/toaster/toastergui/templates/command_line_builds.html | 6 +++++-
 lib/toaster/toastergui/views.py                           | 8 ++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/toaster/toastergui/templates/command_line_builds.html b/=
lib/toaster/toastergui/templates/command_line_builds.html
index fcbe80d8..05db6727 100644
--- a/lib/toaster/toastergui/templates/command_line_builds.html
+++ b/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 =3D '/toastergui/builds/'
+            if (data['response']=3D=3D'building'){
+                location.reload()
+            } else {
+                window.location =3D '/toastergui/builds/'
+            }
         },
         complete:function(data){
         },
diff --git a/lib/toaster/toastergui/views.py b/lib/toaster/toastergui/vie=
ws.py
index 3b5b9f5b..40aed265 100644
--- a/lib/toaster/toastergui/views.py
+++ b/lib/toaster/toastergui/views.py
@@ -2018,6 +2018,14 @@ class CommandLineBuilds(TemplateView):
         logs_dir =3D request.POST.get('dir')
         all_files =3D  request.POST.get('all')
=20
+        # check if a build is already in progress
+        if Build.objects.filter(outcome=3DBuild.IN_PROGRESS):
+            messages.add_message(
+                self.request,
+                messages.ERROR,
+                "A build is already in progress. Please wait for it to c=
omplete before starting a new build."
+            )
+            return JsonResponse({'response': 'building'})
         imported_files =3D EventLogsImports.objects.all()
         try:
             if all_files =3D=3D 'true':
--=20
2.34.1