[PATCH 3/3] prepman: Deprecate it

According to PMS, calling prepman from ebuilds was never allowed.
Last usage in Gentoo repository has been removed on 2019-04-14.

Signed-off-by: Ulrich Müller <[email protected]>
---
 bin/ebuild-helpers/prepman | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/bin/ebuild-helpers/prepman b/bin/ebuild-helpers/prepman
index 871fd589b..0c0a7e812 100755
--- a/bin/ebuild-helpers/prepman
+++ b/bin/ebuild-helpers/prepman
@@ -1,8 +1,12 @@
 #!/usr/bin/env bash
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2023 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # Note: this really does nothing these days. It's going to be banned
 # when the last consumers are gone.
 
+source "${PORTAGE_BIN_PATH}"/isolated-functions.sh || exit 1
+
+eqawarn "QA Notice: '${0##*/}' is not allowed in ebuild scope"
+
 exit 0
-- 
2.40.0