updater: combine installer logs into the task file

src/scripts/update.sh

@@ -14,8 +14,8 @@ if [[ $# == 1 && "$1" == "--check" ]]; then
     exit 0
 fi
 
-if [[ $# != 1 ]]; then
-    echo "sourceDir argument required"
+if [[ $# != 2 ]]; then
+    echo "Usage: update.sh <sourceDir> <logFile> arguments required"
     exit 1
 fi
 
@@ -24,19 +24,17 @@ function log() {
 }
 
 readonly source_dir="${1}"
+readonly log_file="${2}"
+
 readonly installer_path="${source_dir}/scripts/installer.sh"
+readonly ubuntu_version=$(lsb_release -rs)
 
 log "updating Cloudron with ${source_dir}"
 
-systemctl reset-failed "${updater_service}" 2>/dev/null || true
-
 # StandardError will follow StandardOutput in default inherit mode. https://www.freedesktop.org/software/systemd/man/systemd.exec.html
-readonly DATETIME=`date '+%Y-%m-%d_%H-%M-%S'`
-readonly LOG_FILE="/home/yellowtent/platformdata/logs/updater/cloudron-updater-${DATETIME}.log"
-
-log "starting service ${updater_service}. see logs at ${LOG_FILE}"
-
-if ! systemd-run --property=OOMScoreAdjust=-1000 --unit "${updater_service}" -p StandardOutput=file:${LOG_FILE} ${installer_path}; then
+systemctl reset-failed "${updater_service}" 2>/dev/null || true
+[[ "${ubuntu_version}" == "18.04" ]] && file_mode="file" || file_mode="append"
+if ! systemd-run --property=OOMScoreAdjust=-1000 --unit "${updater_service}" -p StandardOutput=${file_mode}:${log_file} ${installer_path}; then
     log "Failed to install cloudron"
     exit 1
 fi