fix deprecated pkg_resources

hpy/devel/__init__.py

@@ -201,16 +201,23 @@ def handle_hpy_ext_modules(dist, attr, hpy_ext_modules):
 _HPY_UNIVERSAL_MODULE_STUB_TEMPLATE = """
 # DO NOT EDIT THIS FILE!
 # This file is automatically generated by hpy
-
 def __bootstrap__():
-
-    from sys import modules
-    from os import environ
-    from pkg_resources import resource_filename
+    from sys import modules, version_info
+    from os import environ, path
+    from contextlib import nullcontext
+    from importlib import resources
     from hpy.universal import _load_bootstrap
-    ext_filepath = resource_filename(__name__, {ext_file!r})
-    m = _load_bootstrap({module_name!r}, __name__, __package__, ext_filepath,
-                        __loader__, __spec__, environ)
+    ext_name = {ext_file!r}
+    if not __package__:
+        # directly called with python -m
+        ctx = nullcontext(path.join(path.dirname(__file__), ext_name))
+    elif version_info < (3, 9):
+        ctx = resources.path(__package__, ext_name)
+    else:
+        ctx = nullcontext(resources.files(__package__).joinpath(ext_name))
+    with ctx as ext_filepath:
+        m = _load_bootstrap({module_name!r}, __name__, __package__, str(ext_filepath),
+                            __loader__, __spec__, environ)
     modules[__name__] = m
 
 __bootstrap__()