Question

I am writing a cmd script for creating self signed certificate using keytool. I wanted to check if the alias already present in keystore ,

So I need to execute the below command and store it in a variable. So that if the variable is null I can assume that alias doesnt exists,

  keytool -list -v -storepass "%KEYSTORE_PASS%" -keystore cert/seurat-keystore.jks ^| find "Alias name: 1"

I tried with

   FOR /F "tokens=* delims=" %%A IN ('keytool -list -v -storepass "%KEYSTORE_PASS%" -keystore cert/seurat-keystore.jks ^| find "Alias name: 1"') DO SET Variable=%%A
    echo %Variable%

but it displays echo off. Same I achieved in shell script using the below code,

   if [ -n  "$(keytool -list -v -storepass "${KEYSTORE_PASS}" -keystore cert/seurat-keystore.jks | grep 'Alias name: 1')" ] ; then
   fi

How can I achieve the same in cmd script ? Any help will be really appreciable !!!

Answer 1

Excuse me. You wrote “if the variable is null I can assume that alias doesnt exists”. If the echo %variable% command show ECHO OFF, then the variable is null! I think your code is correct, but slightly change it this way:

FOR /F "tokens=* delims=" %%A IN ('keytool -list -v -storepass "%KEYSTORE_PASS%" -keystore cert/seurat-keystore.jks ^| find "Alias name: 1"') DO SET Variable=%%A
if "%Variable%" == "" (
   echo The alias doesn't exists
) else (
   echo The alias is: %Variable%
)

Another way is:

if not defined Variable (
   echo The alias doesn't exists
) else (
   echo The alias is: %Variable%
)