Useful windows batch file snippets

template.bat

:: Check if argument equals string
if /i "%1" equ "/resume" (
  echo Resuming now!
)

:: Allow argument, but override if needed
set action=%1
if "%action%"=="" (
	set action=start
)

:: Check for administrator permissions
NET SESSION >nul 2>&1
IF %ERRORLEVEL% NEQ 0 (
    ECHO Failure: Current permissions inadequate.  You should run this with elevated permissions.
    :: `setx` failed without admin permissions
    :: Part of `choco install netfx-4.6.1-devpack` failed
    goto :eof
)

:: Build a datetime string (20161802T104304)... can't do UTC probably
for /f "tokens=1-8 delims=::./ " %%A in ('echo %DATE% %TIME%') do set FileDateTime=%%D%%C%%BT%%E%%F%%G
:: Better to read: 2016-18-02 104759
for /f "tokens=1-8 delims=::./ " %%A in ('echo %DATE% %TIME%') do set FileDateTime=%%D-%%C-%%B %%E%%F%%G