A PowerShell Batch wrapper

wrapper.cmd

# 2>NUL & @CLS & PUSHD "%~dp0" & "%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -nol -nop -ep bypass "[IO.File]::ReadAllText('%~f0')|iex" & POPD & EXIT /B

<#
@
Stops a command from echoing to the console host.

# 2>NUL & @CLS
This allows us to comment out the batch wrapper part from the powershell script and eats the cmd.exe error since # is not a command or control character.

PUSHD "%~dp0"
Ensure our working directory is the same as the script's root so we can use $PWD accurately in the script (since $PSScriptRoot will be unavailable).

"%SystemRoot%\[...]\powershell.exe"
Ensure we're executing the right interpreter. If this is compromised, there's no hope for the system anyways.

-nol -nop -ep bypass
-NoLogo -NoProfile -ExecutionPolicy Bypass

"[IO.File]::ReadAllText('%~f0')|iex"
-Command "Invoke-Expression -Command ([System.IO.File]::ReadAllText('%~f0'))"
%~f0 will evaluate to the script's fully-qualified name. This piece is what actually executes our script with Invoke-Expression. powershell.exe will not execute files without a .ps1 extension so this piece is necessary without creating an intermediate temp file.

POPD
Resets the working directory.

EXIT /B
Allows %ERRORLEVEL% to be reflected properly.
#>