[WIP] Partial bot skeleton, non-functional though

vendor/github.com/cockroachdb/pebble/vfs/disk_usage_windows.go

@@ -0,0 +1,22 @@
+// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+//go:build windows
+// +build windows
+
+package vfs
+
+import "golang.org/x/sys/windows"
+
+func (defaultFS) GetDiskUsage(path string) (DiskUsage, error) {
+	p, err := windows.UTF16PtrFromString(path)
+	if err != nil {
+		return DiskUsage{}, err
+	}
+	var freeBytes uint64
+	du := DiskUsage{}
+	err = windows.GetDiskFreeSpaceEx(p, &du.AvailBytes, &du.TotalBytes, &freeBytes)
+	du.UsedBytes = du.TotalBytes - freeBytes
+	return du, err
+}