Merge pull request #345 from jangsutsr/7532_disallow_custom_inv_src_from_using_wrong_cred

Disallow custom inventory sources from using meaningless credentials

awx/main/models/inventory.py

@@ -1143,6 +1143,11 @@ class InventorySourceOptions(BaseModel):
         # from the instance metadata instead of those explicitly provided.
         elif self.source in CLOUD_PROVIDERS and self.source != 'ec2':
             raise ValidationError(_('Credential is required for a cloud source.'))
+        elif self.source == 'custom' and cred and cred.credential_type.kind in ('scm', 'ssh', 'insights', 'vault'):
+            raise ValidationError(_(
+                'Credentials of type machine, source control, insights and vault are '
+                'disallowed for custom inventory sources.'
+            ))
         return cred
 
     def clean_source_regions(self):