Allow container list override in main pipeline

README.md

@@ -113,6 +113,16 @@ Preview all stages without stopping containers, copying, or deleting:
 sudo /backupdockerscripts/backup.sh --dry-run
 ```
 
+Select a different container list for one complete pipeline run:
+
+```bash
+sudo /backupdockerscripts/backup.sh --containers containers-special.txt
+```
+
+Relative container-list paths are resolved from the repository directory;
+absolute paths are also accepted. The selected list affects only the container
+archive stage, after which configured transfer methods and pruning continue.
+
 Run individual parts:
 
 ```bash

backup.sh

@@ -3,12 +3,13 @@
 set -Eeuo pipefail
 SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
 . "$SCRIPT_DIR/lib/common.sh"
-DRY_RUN=0; SKIP_CONTAINERS=0; SKIP_PRUNE=0
+DRY_RUN=0; SKIP_CONTAINERS=0; SKIP_PRUNE=0; CONTAINERS_OVERRIDE=""
 while [[ $# -gt 0 ]]; do
   case "$1" in
     --dry-run|-t) DRY_RUN=1 ;; --skip-containers) SKIP_CONTAINERS=1 ;; --skip-prune) SKIP_PRUNE=1 ;;
+    --containers|-f) CONTAINERS_OVERRIDE="${2:?Missing containers file}"; shift ;;
     -h|--help)
-      echo "Usage: ${0##*/} [--dry-run] [--skip-containers] [--skip-prune]"
+      echo "Usage: ${0##*/} [--dry-run] [--containers FILE] [--skip-containers] [--skip-prune]"
       echo "Methods run in BACKUP_METHODS order. Add methods/NN-name.sh and list name in BACKUP_METHODS."
       exit 0 ;;
     *) die "Unknown option: $1" 2 ;;
@@ -19,14 +20,17 @@ require_command flock
 mkdir -p "$(dirname "$LOCK_FILE")"
 exec 9>"$LOCK_FILE"
 flock -n 9 || die "Another backup run holds lock: $LOCK_FILE"
-stage_args=(); (( DRY_RUN )) && stage_args+=(--dry-run)
+stage_args=()
+(( DRY_RUN )) && stage_args+=(--dry-run)
+[[ -n "$CONTAINERS_OVERRIDE" ]] && stage_args+=(--containers "$CONTAINERS_OVERRIDE")
 log START "Backup pipeline for $BACKUP_HOSTNAME"
 (( SKIP_CONTAINERS )) || "$SCRIPT_DIR/stages/10-containers.sh" "${stage_args[@]}"
+method_args=(); (( DRY_RUN )) && method_args+=(--dry-run)
 for method in $BACKUP_METHODS; do
   method_script=""
   while IFS= read -r candidate; do method_script="$candidate"; break; done < <(find "$SCRIPT_DIR/methods" -maxdepth 1 -type f -name "*-${method}.sh" -print | sort)
   [[ -n "$method_script" ]] || die "Configured backup method not found: $method"
-  "$method_script" "${stage_args[@]}"
+  "$method_script" "${method_args[@]}"
 done
-(( SKIP_PRUNE )) || "$SCRIPT_DIR/stages/90-prune.sh" "${stage_args[@]}"
+(( SKIP_PRUNE )) || "$SCRIPT_DIR/stages/90-prune.sh" "${method_args[@]}"
 log DONE "Backup pipeline completed successfully"