inject-cmdline-to-template.sh: add checking /dev/rtc0 to script

Signed-off-by: Norio Nomura <[email protected]>

hack/inject-cmdline-to-template.sh

@@ -109,14 +109,15 @@ done
 # provision:
 # - mode: boot
 #   # Booting with a kernel image lacks an RTC, so time synchronization is needed to prevent network errors.
-#   script: systemctl enable systemd-time-wait-sync.service
-if ! yq --exit-status eval '.provision[] | select(.script == "systemctl enable systemd-time-wait-sync.service")' "${template}" &>/dev/null; then
-	echo "Injecting provision[0].script 'systemctl enable systemd-time-wait-sync.service' to ${template}"
+#   script: test -c /dev/rtc0 || systemctl enable systemd-time-wait-sync.service
+readonly enable_wait_sync="test -c /dev/rtc0 || systemctl enable systemd-time-wait-sync.service"
+if ! yq --exit-status eval '.provision[] | select(.script == "'"${enable_wait_sync}"'")' "${template}" &>/dev/null; then
+	echo "Injecting provision[0].script '${enable_wait_sync}' to ${template}"
 	limactl edit --log-level error --set '
 		.provision = [
 			{
 				"mode": "boot",
-				"script": "systemctl enable systemd-time-wait-sync.service"
+				"script": "'"${enable_wait_sync}"'"
 			}| .mode head_comment="Booting with a kernel image lacks an RTC, so time synchronization is needed to prevent network errors."
 		] + (.provision // [])
 	' "${template}"