1 files changed, 54 insertions, 0 deletions
diff --git a/scripts/rollover/rollover.sh b/scripts/rollover/rollover.sh
new file mode 100644
index 0000000..d6e3fab
--- /dev/null
+++ b/scripts/rollover/rollover.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+[ -d "$BACKUP_DIR" ] || {
+  echo "Not a directory: $BACKUP_DIR" >&2
+  exit 1
+}
+
+ts_regex='^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}$'
+
+shopt -s nullglob
+candidates=()
+for p in "$BACKUP_DIR"/*; do
+  [[ -d "$p" ]] || continue
+  name="${p##*/}"
+  [[ "$name" =~ $ts_regex ]] && candidates+=("$name")
+done
+shopt -u nullglob
+
+if ((${#candidates[@]} == 0)); then
+  echo "No matching timestamp directories found in $BACKUP_DIR"
+  exit 0
+fi
+
+mapfile -t sorted < <(printf '%s\n' "${candidates[@]}" | LC_ALL=C sort -r)
+newest="${sorted[0]}"
+newest_path="${BACKUP_DIR%/}/$newest"
+
+for name in "${sorted[@]:1}"; do
+  rm -rf -- "${BACKUP_DIR%/}/$name"
+done
+
+date_part="${newest%%T*}"
+
+if date --version >/dev/null 2>&1; then
+  weekname="$(date -d "$date_part" +%G-W%V)"
+else
+  weekname="$(date -jf "%Y-%m-%d" "$date_part" +%G-W%V)"
+fi
+
+target="${BACKUP_DIR%/}/${weekname}"
+
+if [[ "$newest_path" == "$target" ]]; then
+  echo "Newest directory already named '$target'. Done."
+  exit 0
+fi
+
+if [[ -e "$target" && "$target" != "$newest_path" ]]; then
+  echo "Target '$target' already exists. Refusing to overwrite." >&2
+  exit 1
+fi
+
+mv -- "$newest_path" "$target"
+echo "rolled $newest over to $target"