update-cygwin.bat

:::::::::::::::::::::::::::::::::::::::::
:: Automatically check & get admin rights
:::::::::::::::::::::::::::::::::::::::::
@echo off
CLS
ECHO.
ECHO =============================
ECHO Running Admin shell
ECHO =============================

:checkPrivileges
NET FILE 1>NUL 2>NUL
if '%errorlevel%' == '0' ( goto gotPrivileges ) else ( goto getPrivileges )

:getPrivileges
if '%1'=='ELEV' (shift & goto gotPrivileges)
ECHO.
ECHO **************************************
ECHO Invoking UAC for Privilege Escalation
ECHO **************************************

setlocal DisableDelayedExpansion
set "batchPath=%~0"
setlocal EnableDelayedExpansion
ECHO Set UAC = CreateObject^("Shell.Application"^) > "%temp%\OEgetPrivileges.vbs"
ECHO UAC.ShellExecute "!batchPath!", "ELEV", "", "runas", 1 >> "%temp%\OEgetPrivileges.vbs"
"%temp%\OEgetPrivileges.vbs"
exit /B

:gotPrivileges
::::::::::::::::::::::::::::
::START
::::::::::::::::::::::::::::
setlocal & pushd .

powershell -Command "& {(new-object System.Net.WebClient).DownloadFile('http://cygwin.com/setup-x86_64.exe','setup-x86_64.exe')}"

if errorlevel 1 (
   echo Failed to download Cygwin installer.
   exit.
) else (
   setup-x86_64.exe --upgrade-also --quiet-mode
)

if errorlevel 1 echo Something went wrong with the Cygwin installer.
del setup-x86_64.exe
pause