// Package winexec runs PowerShell on Windows hosts.
//
// It exists because three subsystems - updates, workload collection and
// workload logs - all need the same invocation, and because getting a
// multi-line script past Go quoting, cmd.exe quoting and PowerShell's own
// parser is a problem worth solving once.
package winexec

import (
	"encoding/base64"
	"unicode/utf16"
)

// EncodeCommand renders a script for powershell.exe -EncodedCommand: UTF-16LE,
// no byte-order mark, base64. This is deliberately free of build tags so it is
// tested on a Linux development machine like every other pure function here.
func EncodeCommand(script string) string {
	units := utf16.Encode([]rune(script))
	b := make([]byte, 0, len(units)*2)
	for _, u := range units {
		b = append(b, byte(u), byte(u>>8))
	}
	return base64.StdEncoding.EncodeToString(b)
}