Re: Proposing debugging aid in scripts

[Julian Gilbey <J.D.Gilbey@qmw.ac.uk>]

On Sat, Jan 08, 2000 at 08:19:56PM +0100, Christian Hammers wrote:
> Hello
> 
> Since I begun using debconf I had very much problems because my scripts 
> suddenly were completely silent as I removed all the nice "echo"
> commands that before told me what was going on.
> 
> To solve this problem (verbose for me, no output for users), I started 
> inserting the following line in all my postinst/preinst etc. scripts:
> 
> $DEBIAN_SCRIPT_DEBUG || set -v -x
> 
> This helped me very much. Does anybody has similar tricks, too ? 

if [ -n "$DEBIAN_SCRIPT_DEBUG" ]
then
    echo=echo
else
    echo=:
fi

Then use $echo everywhere.

Alternatively, use something like:

if ...; then echo(){ command echo "$@"; } ; else echo(){ } ; fi

and then use echo normally from then on.

   Julian

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  Julian Gilbey, Dept of Maths, QMW, Univ. of London. J.D.Gilbey@qmw.ac.uk
        Debian GNU/Linux Developer,  see http://www.debian.org/~jdg
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