Re: [gentoo-user] 'if echo hello' in .bashrc

[Mike Kazantsev <mike_kazantsev@fraggod.net>]

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On Fri, 8 May 2009 14:38:58 +0100
Stroller <stroller@stellar.eclipse.co.uk> wrote:

> To find the part to which I refer you'll need to scroll down about  
> halfway through that page to "Colorize grep"; the author advises adding:
> 
>    if echo hello|grep --color=auto l >/dev/null 2>&1; then
>      export GREP_OPTIONS='--color=auto' GREP_COLOR='1;32'
>    fi
> 
> to ~/.bashrc
> 
> Why does he echo hello, please?

Some greps (like BSD one) might not support '--color' option, so "echo
hello|grep --color=auto l" will return error code, skipping if clause,
and won't break grep operation by adding an unsupported option.

-- 
Mike Kazantsev // fraggod.net

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