implementation of 'touch' command on Windows

touch.cmd

Windows does not natively include a touch command.

You can use any of the available public versions or you can use your own version.
Save this code as touch.cmd and place it somewhere in your path.

    @echo off
    setlocal enableextensions disabledelayedexpansion

    (for %%a in (%*) do if exist "%%~a" (
        pushd "%%~dpa" && ( copy /b "%%~nxa"+,, & popd )
    ) else (
        type nul > "%%~fa"
    )) >nul 2>&1

It will iterate over it argument list, and for each element if it exists, update the file timestamp, else, create it.