Fix finding packages without an ``__init__.py`` (#1333)

1 files changed, 7 insertions, 1 deletions

diff --git a/astroid/modutils.py b/astroid/modutils.py
index 6d698469..b20a1840 100644
--- a/astroid/modutils.py
+++ b/astroid/modutils.py
@@ -297,6 +297,9 @@ def _get_relative_base_path(filename, path_to_check):
     if os.path.normcase(real_filename).startswith(path_to_check):
         importable_path = real_filename
 
+    # if "var" in path_to_check:
+    #     breakpoint()
+
     if importable_path:
         base_path = os.path.splitext(importable_path)[0]
         relative_base_path = base_path[len(path_to_check) :]
@@ -307,8 +310,11 @@ def _get_relative_base_path(filename, path_to_check):
 
 def modpath_from_file_with_callback(filename, path=None, is_package_cb=None):
     filename = os.path.expanduser(_path_from_filename(filename))
+    paths_to_check = sys.path.copy()
+    if path:
+        paths_to_check += path
     for pathname in itertools.chain(
-        path or [], map(_cache_normalize_path, sys.path), sys.path
+        paths_to_check, map(_cache_normalize_path, paths_to_check)
     ):
         if not pathname:
             continue