@echo off

setlocal

REM Set intermediate env vars because the %VAR:x=y% notation below
REM (which replaces the string x with the string y in VAR)
REM doesn't handle undefined environment variables. This way
REM we're always dealing with defined variables in those tests.
set CHK_HOME=_%AWS_RDS_HOME%

if "%CHK_HOME:"=%" == "_" goto HOME_MISSING

"%AWS_RDS_HOME:"=%\bin\rds.cmd" rds-add-tag-to-resource %*
goto DONE
:HOME_MISSING
echo AWS_RDS_HOME is not set
exit /b 1

:DONE