pathutil: resurrect comment about path auditing order
It was removed at
51c86c6167c1, but expensive symlink traversal isn't the
only reason we should walk path components from the root.
--- a/mercurial/pathutil.py Wed Oct 16 14:12:48 2019 +0200
+++ b/mercurial/pathutil.py Sat Feb 01 12:57:32 2020 +0900
@@ -100,8 +100,10 @@
parts.pop()
normparts.pop()
# It's important that we check the path parts starting from the root.
- # This means we won't accidentally traverse a symlink into some other
- # filesystem (which is potentially expensive to access).
+ # We don't want to add "foo/bar/baz" to auditeddir before checking if
+ # there's a "foo/.hg" directory. This also means we won't accidentally
+ # traverse a symlink into some other filesystem (which is potentially
+ # expensive to access).
for i in range(len(parts)):
prefix = pycompat.ossep.join(parts[: i + 1])
normprefix = pycompat.ossep.join(normparts[: i + 1])