Fix error suppression in update script

Remove || true error suppression and properly check file/service state before operations

Author: Gabriel Baker

install/nebula-sync-install.sh

@@ -270,12 +270,18 @@ if [[ ! -f "$INSTALL_PATH/nebula-sync" ]]; then
 fi
 
 msg_info "Stopping service"
-systemctl stop nebula-sync.service &>/dev/null || true
+if systemctl is-active --quiet nebula-sync.service 2>/dev/null; then
+  systemctl stop nebula-sync.service
+fi
 msg_ok "Stopped service"
 
 msg_info "Backing up configuration"
-cp "$ENV_PATH" /tmp/nebula-sync.env.bak 2>/dev/null || true
-msg_ok "Backed up configuration"
+if [[ -f "$ENV_PATH" ]]; then
+  cp "$ENV_PATH" /tmp/nebula-sync.env.bak
+  msg_ok "Backed up configuration"
+else
+  msg_warn "Configuration file not found, skipping backup"
+fi
 
 msg_info "Detecting latest Nebula-Sync release"
 LATEST_RELEASE=$(curl -fsSL https://api.github.com/repos/lovelaze/nebula-sync/releases/latest | sed -n 's/.*"tag_name": *"\([^"]*\)".*/\1/p')
@@ -302,9 +308,13 @@ chmod +x nebula-sync
 msg_ok "Downloaded Nebula-Sync"
 
 msg_info "Restoring configuration"
-cp /tmp/nebula-sync.env.bak "$ENV_PATH" 2>/dev/null || true
-rm -f /tmp/nebula-sync.env.bak
-msg_ok "Restored configuration"
+if [[ -f /tmp/nebula-sync.env.bak ]]; then
+  cp /tmp/nebula-sync.env.bak "$ENV_PATH"
+  rm -f /tmp/nebula-sync.env.bak
+  msg_ok "Restored configuration"
+else
+  msg_warn "Backup file not found, keeping existing configuration"
+fi
 
 msg_info "Saving version"
 echo "${LATEST_RELEASE}" > "/opt/nebula-sync_version.txt"