Scheduler: Provide full meta-data for file-graph traversals

Since we potentially have a one-to-many mapping here, we simply use
the first `item` to provide the meta-data. This is a bit hacky, but
needs full SGraph development to be fixed "properly".

loki/bulk/scheduler.py

@@ -656,7 +656,11 @@ def process(self, transformation):
                         if not items:
                             continue
 
-                    transformation.apply(items[0].source, items=items)
+                    _item = items[0]
+                    transformation.apply(
+                        items[0].source, role=_item.role, mode=_item.mode,
+                        item=_item, items=items, targets=_item.targets,
+                    )
             else:
                 for item in traversal:
                     if item_filter and not isinstance(item, item_filter):

tests/test_scheduler.py

@@ -1497,10 +1497,7 @@ def __init__(self):
             self.record = []
 
         def transform_file(self, sourcefile, **kwargs):
-            if 'item' in kwargs:
-                self.record += [kwargs['item'].name + '::' + sourcefile.path.name]
-            else:
-                self.record += [sourcefile.path.name]
+            self.record += [sourcefile.path.name]
 
         def transform_module(self, module, **kwargs):
             self.record += [kwargs['item'].name + '::' + module.name]
@@ -1563,10 +1560,7 @@ def __init__(self):
             self.record = []
 
         def transform_file(self, sourcefile, **kwargs):
-            if 'item' in kwargs:
-                self.record += [kwargs['item'].name + '::' + sourcefile.path.name]
-            else:
-                self.record += [sourcefile.path.name]
+            self.record += [sourcefile.path.name]
 
         def transform_module(self, module, **kwargs):
             self.record += [kwargs['item'].name + '::' + module.name]