execwait + silent

[hanen.jomaa]

I want doing that,

but in my .bat i have a condition if

it depend of the valu return from executed command, in NSIS, can doing that ?

my script is like :

for /F %%i in ('perl.exe -Version') do set ver=%%i


if "%ver%" EQU "perl not installed " goto install

:install
install perl

[jpderuiter]

You can get the printed text from a command with nsExec::ExecToStack (and skip batch file):

code:
nsExec::ExecToStack '"perl.exe" -Version'

Pop $0 # return value/error/timeout

Pop $1 # printed text

StrCpy $1 "$1" "" -18 # only keep last 18 characters from the returned string

${If} $1 == "perl not installed"

   goto install

${EndIf}