first commit

scripts/ops/prune-backups.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+BACKUP_ROOT="${1:-$ROOT_DIR/backups}"
+KEEP_COUNT="${2:-14}"
+
+if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
+  cat <<'USAGE'
+Usage:
+  scripts/ops/prune-backups.sh [backup-root] [keep-count]
+
+Examples:
+  scripts/ops/prune-backups.sh
+  scripts/ops/prune-backups.sh /var/backups/productier 30
+USAGE
+  exit 0
+fi
+
+if ! [[ "$KEEP_COUNT" =~ ^[0-9]+$ ]] || [[ "$KEEP_COUNT" -lt 1 ]]; then
+  echo "[error] keep-count must be a positive integer" >&2
+  exit 1
+fi
+
+if [[ ! -d "$BACKUP_ROOT" ]]; then
+  echo "[info] backup root does not exist; nothing to prune"
+  exit 0
+fi
+
+mapfile -t backup_dirs < <(
+  find "$BACKUP_ROOT" -mindepth 1 -maxdepth 1 -type d -printf '%f\n' \
+    | grep -E '^[0-9]{8}T[0-9]{6}Z$' \
+    | sort -r
+)
+
+if [[ "${#backup_dirs[@]}" -le "$KEEP_COUNT" ]]; then
+  echo "[info] no pruning needed (${#backup_dirs[@]} backup(s), keep=$KEEP_COUNT)"
+  exit 0
+fi
+
+for backup_name in "${backup_dirs[@]:$KEEP_COUNT}"; do
+  target="$BACKUP_ROOT/$backup_name"
+  echo "[step] removing old backup: $target"
+  rm -rf "$target"
+done
+
+echo "[ok] pruned backups, kept latest $KEEP_COUNT"