Batch script: convert path to linux format using wslpath

try this:

echo "%cd%" -- "%~dp0"

%cd%Return the path without ending backslashes. So you can add a second variable that clears it.

set "scriptDir=%~dp0"
set "scriptDir=%scriptDir:~0,-1%"

UPDATE (with string replacement only - use toLinuxPath subroutine)

@echo off

call ::toLinuxPath "%userprofile%\AppData\Local\Temp" tempF
echo %tempF%
exit /b 0

:toLinuxPath [returnVariable - the result will be stored in it; If omitted will be only echoed]
setlocal 

    set "_path=%~p1"
    set "name=%~nx1"
    set "drive=%~d1"

    set "rtrn=%~2"

    set "result=/mnt/%drive:~0,1%%_path:\=/%%name%"


endlocal & (
    if "%~2" neq "" (
        set "%rtrn%=%result%"
    ) else (
        echo %result%
    )
)