[PATCH v3 7/8] systemd.bbclass: support user units in postinst and prerm hooks

["Artur Kowalski" <arturkow2000@gmail.com>]

Handle user units in a manner similar to system units where possible.
Not everything is supported by systemd, but systemd limitations only
affect runtime package management - during update user services are not
reloaded/restart and each user must re-login or manually restart
services.

Signed-off-by: Artur Kowalski <arturkow2000@gmail.com>
---
 meta/classes-recipe/systemd.bbclass | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/meta/classes-recipe/systemd.bbclass b/meta/classes-recipe/systemd.bbclass
index 177ee5d974..4c9f51d33d 100644
--- a/meta/classes-recipe/systemd.bbclass
+++ b/meta/classes-recipe/systemd.bbclass
@@ -40,14 +40,24 @@ if systemctl >/dev/null 2>/dev/null; then
 		for service in ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}; do
 			systemctl ${OPTS} enable "$service"
 		done
+
+		for service in ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", True, d)}; do
+			systemctl --global ${OPTS} enable "$service"
+		done
 	fi
 
 	if [ -z "$D" ]; then
+		# Reload only system service manager
+		# --global for daemon-reload is not supported: https://github.com/systemd/systemd/issues/19284
 		systemctl daemon-reload
 		[ -n "${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}" ] && \
 			systemctl preset ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}
 
+		[ -n "${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", True, d)}" ] && \
+			systemctl --global preset ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", True, d)}
+
 		if [ "${SYSTEMD_AUTO_ENABLE}" = "enable" ]; then
+			# --global flag for restart is not supported by systemd (see above)
 			[ -n "${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}" ] && \
 				systemctl --no-block restart ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}
 		fi
@@ -62,6 +72,10 @@ if systemctl >/dev/null 2>/dev/null; then
 			systemctl stop ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}
 			systemctl disable ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", False, d)}
 		fi
+
+		# same as above, --global flag is not supported for stop so do disable only
+		[ -n "${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", True, d)}" ] && \
+			systemctl --global disable ${@systemd_filter_services("${SYSTEMD_SERVICE_ESCAPED}", True, d)}
 	fi
 fi
 }
@@ -111,6 +125,9 @@ def systemd_service_exists(service, user, d):
 
     return path != ''
 
+def systemd_filter_services(services, user, d):
+    return ' '.join(service for service in services.split() if systemd_service_exists(service, user, d))
+
 python systemd_populate_packages() {
     import re
     import shlex
-- 
2.47.1