Script cleanup.

tools/restore-server.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# Restores a backup made by backup-server.sh into MINECRAFT_SERVER_PATH.
+# Each top-level item in the archive (plugins, config, worlds, settings) is
+# replaced; a "pre-restore" backup of the current state is taken first.
+#
+# Usage: restore-server.sh [-y|--yes] [--no-backup] [backup-file|name]
+#   Defaults to the newest backup in MINECRAFT_BACKUP_PATH.
+
+set -euo pipefail
+
+TOOLS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=setup-env.sh
+source "$TOOLS_DIR/setup-env.sh"
+
+ASSUME_YES=false
+SAFETY_BACKUP=true
+ARCHIVE=""
+for arg in "$@"; do
+  case "$arg" in
+    -y|--yes) ASSUME_YES=true ;;
+    --no-backup) SAFETY_BACKUP=false ;;
+    -h|--help) sed -n '2,8p' "$0"; exit 0 ;;
+    -*) echo "Unknown option: $arg" >&2; exit 1 ;;
+    *) ARCHIVE="$arg" ;;
+  esac
+done
+
+if [[ -z "$ARCHIVE" ]]; then
+  ARCHIVE=$(ls -t "$MINECRAFT_BACKUP_PATH"/backup-*.tar.bz2 2>/dev/null | head -n1 || true)
+  [[ -n "$ARCHIVE" ]] || { echo "Error: no backups found in $MINECRAFT_BACKUP_PATH." >&2; exit 1; }
+elif [[ ! -f "$ARCHIVE" && -f "$MINECRAFT_BACKUP_PATH/$ARCHIVE" ]]; then
+  ARCHIVE="$MINECRAFT_BACKUP_PATH/$ARCHIVE"
+fi
+[[ -f "$ARCHIVE" ]] || { echo "Error: backup not found: $ARCHIVE" >&2; exit 1; }
+ARCHIVE="$(cd "$(dirname "$ARCHIVE")" && pwd)/$(basename "$ARCHIVE")"
+
+if pgrep -f "java.*paper-.*\.jar" >/dev/null; then
+  echo "Error: the server is running. Stop it first (tools/stop-server.sh)." >&2
+  exit 1
+fi
+
+ENTRIES=$(tar -tjf "$ARCHIVE")
+if grep -qE '^/|(^|/)\.\.(/|$)' <<<"$ENTRIES"; then
+  echo "Error: archive contains absolute or '..' paths; refusing to restore." >&2
+  exit 1
+fi
+TOP_LEVEL=$(sed -E 's#^\./##; s#/.*##' <<<"$ENTRIES" | { grep -vE '^\.?$' || true; } | sort -u)
+[[ -n "$TOP_LEVEL" ]] || { echo "Error: backup is empty." >&2; exit 1; }
+
+echo "Restore $(basename "$ARCHIVE") into $MINECRAFT_SERVER_PATH"
+echo "These items will be replaced:"
+sed 's/^/  /' <<<"$TOP_LEVEL"
+if ! $ASSUME_YES; then
+  read -r -p "Continue? [y/N] " reply
+  [[ "$reply" =~ ^[Yy]$ ]] || { echo "Aborted."; exit 1; }
+fi
+
+mkdir -p "$MINECRAFT_SERVER_PATH"
+if $SAFETY_BACKUP && [[ -n "$(ls -A "$MINECRAFT_SERVER_PATH")" ]]; then
+  "$TOOLS_DIR/backup-server.sh" pre-restore
+fi
+
+while IFS= read -r item; do
+  rm -rf "${MINECRAFT_SERVER_PATH:?}/$item"
+done <<<"$TOP_LEVEL"
+
+tar -xjf "$ARCHIVE" -C "$MINECRAFT_SERVER_PATH"
+echo "Restored $(basename "$ARCHIVE")."