Add "backup" tool

utils/backup/backup

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+user="default"
+path="."
+
+usage() {
+    echo
+    echo "A trivial script to upload your files into ClickHouse."
+    echo "You might want to use something like Dropbox instead, but..."
+    echo
+    echo "Usage: $0 --host <hostname> [--user <username>] --password <password> <path>"
+    exit 1
+}
+
+while [[ "$#" -gt 0 ]]; do
+    case "$1" in
+        --host)
+            host="$2"
+            shift 2
+            ;;
+        --user)
+            user="$2"
+            shift 2
+            ;;
+        --password)
+            password="$2"
+            shift 2
+            ;;
+        --help)
+            usage
+            ;;
+        *)
+            path="$1"
+            shift 1
+            ;;
+    esac
+done
+
+if [ -z "$host" ] || [ -z "$password" ]; then
+    echo "Error: --host and --password are mandatory."
+    usage
+fi
+
+clickhouse-client --host "$host" --user "$user" --password "$password" --secure --query "CREATE TABLE IF NOT EXISTS default.files (time DEFAULT now(), path String, content String CODEC(ZSTD(6))) ENGINE = MergeTree ORDER BY (path, time)" &&
+find "$path" -type f | clickhouse-local --input-format LineAsString \
+    --max-block-size 1 --min-insert-block-size-rows 0 --min-insert-block-size-bytes '100M' --max-insert-threads 1 \
+    --query "INSERT INTO FUNCTION remoteSecure('$host', default.files, '$user', '$password') (path, content) SELECT line, file(line) FROM table" --progress