Re: Controlling script execution without environment variables based on file content

John Bartley K7AAY escribió:
> Need to peek in a file, and based on what you see, conditionally
> execute a subroutine in an XP batch file? Tired of trying to figure
> out how to stuff a value into an environment variable?  Instead, use
> GNU grep from gnuwin32.sourceforge.net and try:
> 
> grep CONDITION filename && goto JUST-DO-IT
> rem DON'T DO IT - put commands here to perform if condition not met
> goto OVER-IT
> :JUST-DO-IT
> put commands here to perform if condition met
> :OVER-IT
> 
> The portion of the first command line after the && only executes if
> the grep was successful. If grep found what you were looking for, the
> script branches to JUST-DO-IT. If grep did not find what you were
> looking for, the next line executes, and all lines below it, until you
> hit the second goto which sends you over the the JUST-DO-IT branch,
> and rejoins the script at OVER-IT.

The script can be rewritten as:

grep -q CONDITION filename
if not ERRORLEVEL 1 (
    put commands here to perform if CONDITION found
) else (
    put commands here to perform if CONDITION not found
)

Yes, this is for Windows XP.

Hope this helps.
-- 
Manuel Collado - http://lml.ls.fi.upm.es/~mcollado