Standardize CT update backup handling (#15937)

ct/slskd.sh

@@ -36,19 +36,17 @@ function update_script() {
     [[ -f /etc/systemd/system/soularr.service ]] && systemctl stop soularr.timer soularr.service
     msg_ok "Stopped Service(s)"
 
-    msg_info "Backing up config"
-    cp /opt/slskd/config/slskd.yml /opt/slskd.yml.bak
-    msg_ok "Backed up config"
+    create_backup /opt/slskd/config/slskd.yml
 
     CLEAN_INSTALL=1 fetch_and_deploy_gh_release "Slskd" "slskd/slskd" "prebuild" "latest" "/opt/slskd" "slskd-*-linux-$(arch_resolve "x64" "arm64").zip"
 
-    msg_info "Restoring config"
-    mv /opt/slskd.yml.bak /opt/slskd/config/slskd.yml
+    restore_backup
 
+    msg_info "Migrating config"
     # Migrate 0.25.0 breaking config key renames
     sed -i 's/^global:/transfers:/' /opt/slskd/config/slskd.yml
     sed -i 's/^integration:/integrations:/' /opt/slskd/config/slskd.yml
-    msg_ok "Restored config"
+    msg_ok "Migrated config"
 
     msg_info "Starting Service(s)"
     systemctl start slskd
@@ -63,13 +61,11 @@ function update_script() {
       msg_ok "Stopped Timer and Service"
     fi
 
-    msg_info "Backing up Soularr config"
-    cp /opt/soularr/config.ini /opt/soularr_config.ini.bak
-    cp /opt/soularr/run.sh /opt/soularr_run.sh.bak
-    msg_ok "Backed up Soularr config"
+    create_backup /opt/soularr/config.ini /opt/soularr/run.sh
 
     PYTHON_VERSION="3.11" setup_uv
     CLEAN_INSTALL=1 fetch_and_deploy_gh_release "Soularr" "mrusse/soularr" "tarball" "latest" "/opt/soularr"
+    restore_backup
     msg_info "Updating Soularr"
     cd /opt/soularr
     $STD uv venv -c venv
@@ -78,11 +74,6 @@ function update_script() {
     deactivate
     msg_ok "Updated Soularr"
 
-    msg_info "Restoring Soularr config"
-    mv /opt/soularr_config.ini.bak /opt/soularr/config.ini
-    mv /opt/soularr_run.sh.bak /opt/soularr/run.sh
-    msg_ok "Restored Soularr config"
-
     msg_info "Starting Soularr Timer"
     systemctl restart soularr.timer
     msg_ok "Started Soularr Timer"