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Date: Thu, 25 Nov 2010 14:29:41 +0100
From: Alexandre Bezroutchko <abb AT gremwell DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: Portable Cygwin: replacing drivename in a text file
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Hi Fergus,

The problem is $HOME contains '/' character used as delimited in regex. 
You need to escape it first:

HOME_ESCAPED=`echo "$HOME" | sed 's#/#\\\\/#g'`
echo 123 | sed "s/2/$HOME_ESCAPED/g"

It is not cygwin-specific.

Cheers,
Alex
www.gremwell.com

On 11/25/2010 02:15 PM, Fergus wrote:
>> I can't get the syntax quite right.
>> Can anybody help, please? Thank you very much.
>
> Thanks very much indeed for various suggestions, much appreciated. I
> guess by yakking on about "drivename" I moved the focus of my question
> to its practical application and thereby managed to blur things. My real
> question is
>
> Given the string 123 how can I use sed to change it to 1$HOME3 or, in my
> case, 1/home/user3. Various combinations of ' " and ` (also arbitrary
> separators) all fail as in
>
> echo 123 | sed 's/2/"$HOME"/g'
> echo 123 | sed 's/2/`$HOME`/g'
> echo 123 | sed "s/2/'"$HOME"'/g"
> echo 123 | sed 's/2/@$HOME@/g'
>
> Thank you (again).
>
> Fergus
>
>
>
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