I'm trying to find a variable or a command that will tell me where the
currently executing script lives.

So, If I'm running /foo/bar.sh, I'm looking for a something that will
give me "/foo/", while I'm inside the script bar.sh.

On windows, this is "%~dp0".

On linux, `pwd` isn't right all the time, because it tells the
location the script was executed from, not where it lives.

$0 is not normalized, it can have all sorts of interesting paths in it.

The best I have come up with so far is:

PROG=`which $0`
PROGDIR=`dirname $PROG`
echo $PROGDIR

But I'm not yet convinced that this will always work.

Is there an easier way to do this?

Thanks,

Dan