# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 2020-09-12 18:18:12
# Node ID dd9e286124681ba027c2df853ec8d71e2b90a8c1
# Parent  e53a3d0ef416e3b7c5538457da33cc4c0a22cb75

resourceutil: document when we expect to take the importlib.resouces code path

Differential Revision: https://phab.mercurial-scm.org/D9018

diff --git a/mercurial/utils/resourceutil.py b/mercurial/utils/resourceutil.py
--- a/mercurial/utils/resourceutil.py
+++ b/mercurial/utils/resourceutil.py
@@ -55,6 +55,8 @@ else:
 
 
 try:
+    # importlib.resources exists from Python 3.7; see fallback in except clause
+    # further down
     from importlib import resources
 
     from .. import encoding
@@ -78,6 +80,8 @@ try:
 
 
 except (ImportError, AttributeError):
+    # importlib.resources was not found (almost definitely because we're on a
+    # Python version before 3.7)
 
     def open_resource(package, name):
         path = os.path.join(_package_path(package), name)