if ("%1"=="") goto usage

@echo This should not execute

@echo Done.
goto :eof

:usage
@echo Usage: %0 <EnvironmentName>
exit 1

@echo off

if [%1]==[] goto usage
@echo This should not execute
@echo Done.
goto :eof
:usage
@echo Usage: %0 ^<EnvironmentName^>
exit /B 1

echo "%1"

if ("%1"=="") echo match1

if "%1"=="" echo match2

C:>echo ""
""

C:>if ("" == "") echo match1

C:>if "" == "" echo match2
match2