Acked-by: Mike Gilbert <[email protected]>
Signed-off-by: Ulrich Müller <[email protected]>
---
v2: Add explanation and documentation reference to warning message

 eclass/acct-user.eclass | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/eclass/acct-user.eclass b/eclass/acct-user.eclass
index f658aa0eabc3..c9d335c4e558 100644
--- a/eclass/acct-user.eclass
+++ b/eclass/acct-user.eclass
@@ -431,6 +431,20 @@ acct-user_pkg_postinst() {
                opts+=( --prefix "${ROOT}" )
        fi
 
+       local g old_groups del_groups=""
+       old_groups=$(egetgroups "${ACCT_USER_NAME}")
+       for g in ${old_groups//,/ }; do
+               has "${g}" "${groups[@]}" || del_groups+="${del_groups:+, }${g}"
+       done
+       if [[ -n ${del_groups} ]]; then
+               ewarn "Removing user ${ACCT_USER_NAME} from group(s): 
${del_groups}"
+               ewarn "To retain the user's group membership in the local 
system"
+               ewarn "config, override with 
ACCT_USER_${ACCT_USER_NAME^^}_GROUPS"
+               ewarn "or ACCT_USER_${ACCT_USER_NAME^^}_GROUPS_ADD in 
make.conf."
+               ewarn "Documentation reference:"
+               ewarn 
"https://wiki.gentoo.org/wiki/Practical_guide_to_the_GLEP_81_migration#Override_user_groups";
+       fi
+
        elog "Updating user ${ACCT_USER_NAME}"
        # usermod outputs a warning if unlocking the account would result in an
        # empty password. Hide stderr in a text file and display it if usermod 
fails.
-- 
2.42.0


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