Windows bat file how to verify output of a command

Question

I want to verify an installation on a windows (XP) machine. So i want to create a .bat file that does the work.

I want to verify commands like

jruby --version

and echo "OK" if it gives reasonable output. So in pseudocode:

if( `jruby --version`.startsWith("jruby 1.5.6") then 
  echo "OK"
else
  echo "FAIL: Jruby not working!"

Any ideas on how to make that comparison in a bat file?

score 1 · Accepted Answer · edited Mar 01 '11 at 19:32

1

@echo off
jruby --version 2>&1 | findstr /I /C:"jruby 1.5.6" > nul

if %errorlevel% == 0 (
    echo "OK"
) else (
    echo "FAIL: Jruby not working!"
)

pause

edited Mar 01 '11 at 19:32

Jesper Rønn-Jensen

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answered Mar 01 '11 at 15:48

Rene Larsen

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Thanks Rene. I wonder about that `%errorlevel%`. Will this also work for multiple following checks, so that i can do a series of checks. One failing must not lead to the next failing. – Jesper Rønn-Jensen Mar 01 '11 at 19:30
Hi Jesper. You can with `%errorlevel%` decide after each command/check if you want to exit out or not, the `%errorlevel%` will get a new state after each command. Maybe you want to save the state of `%errorlevel%` in another variable, and then use the information at the end of all checks - you decide all by your self. – Rene Larsen Mar 01 '11 at 20:15

Windows bat file how to verify output of a command

1 Answers1