add guardian to allow creating per-project permissions

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Author: mchehab

patchwork/admin.py

@@ -8,6 +8,8 @@
 from django.contrib.auth.models import User
 from django.db.models import Prefetch
 
+from guardian.admin import GuardedModelAdmin
+
 from patchwork.models import Bundle
 from patchwork.models import Check
 from patchwork.models import Cover
@@ -44,7 +46,7 @@ class DelegationRuleInline(admin.TabularInline):
     fields = ('path', 'user', 'priority')
 
 
-class ProjectAdmin(admin.ModelAdmin):
+class ProjectAdmin(GuardedModelAdmin):
     list_display = ('name', 'linkname', 'listid', 'listemail')
     inlines = [
         DelegationRuleInline,

patchwork/settings/base.py

@@ -22,6 +22,7 @@
     'django.contrib.sites',
     'django.contrib.admin',
     'django.contrib.staticfiles',
+    'guardian',
     'patchwork',
 ]
 
@@ -71,6 +72,11 @@
     },
 ]
 
+AUTHENTICATION_BACKENDS = [
+    'django.contrib.auth.backends.ModelBackend',
+    'guardian.backends.ObjectPermissionBackend',
+]
+
 FORM_RENDERER = 'patchwork.forms.PatchworkTableRenderer'
 
 # TODO(stephenfin): Consider changing to BigAutoField when we drop support for