Jannis Braun
a4333c4c23
Finding 1: no-arg branch used 'ls ... | while' which, under set -euo pipefail, exits 1 on an empty backups dir (glob matches nothing). Replace with shopt nullglob array check that prints a clear message and exit 0. Finding 2: pass $TS and $SNAP_NAME as positional args to the inner alpine shell instead of interpolating them into the sh -c string, making the swap injection-proof. Behavior unchanged: pre-restore copy -> clear WAL/SHM -> install.
67 lines
2.2 KiB
Bash
Executable File
67 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Restore the Backspace SQLite DB from a snapshot in data/backups/.
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# Usage:
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# ./restore.sh List available snapshots.
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# ./restore.sh <snapshot.db> Restore the named snapshot (path or basename).
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set -euo pipefail
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cd "$(dirname "$0")"
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BACKUP_DIR="data/backups"
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DB="data/backspace.db"
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if [[ ! -d "$BACKUP_DIR" ]]; then
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echo "No backups directory at $BACKUP_DIR." >&2
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exit 1
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fi
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# No arg: list snapshots newest-first and exit.
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if [[ $# -eq 0 ]]; then
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shopt -s nullglob
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snaps=("$BACKUP_DIR"/*.db)
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shopt -u nullglob
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if [[ ${#snaps[@]} -eq 0 ]]; then
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echo "No snapshots found in $BACKUP_DIR."
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exit 0
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fi
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echo "Available snapshots (newest first):"
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for f in $(ls -1t "$BACKUP_DIR"/*.db); do
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printf " %s (%s)\n" "$(basename "$f")" "$(du -h "$f" | cut -f1)"
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done
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echo ""
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echo "Restore with: ./restore.sh <snapshot-filename>"
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exit 0
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fi
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# Resolve the snapshot to a basename inside BACKUP_DIR (restore is always from data/backups/).
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SNAP_NAME="$(basename "$1")"
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if [[ ! -f "$BACKUP_DIR/$SNAP_NAME" ]]; then
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echo "Snapshot not found in $BACKUP_DIR: $SNAP_NAME" >&2
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exit 1
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fi
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echo "About to restore: $BACKUP_DIR/$SNAP_NAME"
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echo "This will REPLACE $DB. The current DB is saved first as a pre-restore snapshot."
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read -rp "Continue? [y/N] " yn
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[[ "${yn,,}" == "y" ]] || { echo "Aborted."; exit 0; }
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echo "[1/3] Stopping backspace container..."
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docker compose stop backspace
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# data/backspace.db and data/backups/ are container-owned (root). The host user cannot
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# cp/rm them directly, so do the swap inside a throwaway root container that mounts data/.
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# (youruser is in the docker group on both boxes — no sudo prompt.)
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TS="$(date -u +%Y%m%dT%H%M%S)"
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echo "[2/3] Swapping DB inside a root container (pre-restore copy + WAL clear + install)..."
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docker run --rm -v "$(pwd)/data:/data" alpine sh -c '
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set -e
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if [ -f /data/backspace.db ]; then
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cp /data/backspace.db "/data/backups/backspace-$1-pre-restore.db"
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fi
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rm -f /data/backspace.db-wal /data/backspace.db-shm
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cp "/data/backups/$2" /data/backspace.db
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' sh "$TS" "$SNAP_NAME"
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echo "[3/3] Starting backspace container..."
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docker compose start backspace
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echo "Done. Watch health: docker compose logs -f backspace"
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