add repo path to base env when loading libs

src/bundlewrap/repo.py

@@ -223,15 +223,15 @@ def __setstate__(self, state):
         self.__path = state
 
 
-def nodes_from_file(filepath, libs):
+def nodes_from_file(filepath, libs, repo_path):
     """
     Returns a list of nodes as defined in the given nodes.py.
     """
     try:
         flat_node_dict = utils.getattr_from_file(
             filepath,
             'nodes',
-            base_env={'libs': libs},
+            base_env={'libs': libs, 'repo_path': repo_path},
         )
     except KeyError:
         raise RepositoryError(
@@ -427,7 +427,7 @@ def populate_from_path(self, path):
 
         # populate nodes
         self.node_dict = {}
-        for node in nodes_from_file(self.nodes_file, self.libs):
+        for node in nodes_from_file(self.nodes_file, self.libs, self.path):
             self.add_node(node)
 
     @utils.cached_property