Wrap profile into the execute() function

[loonies]

Looks like the $workdir is not working at times i.e. it works on
initially created session, but doesn't work if session is detached and
reattached. Looks like the problem is that sourced profile variable
$workdir is not exported and available in the shell.

One solution that comes to my mind is to wrap plumbing code into an
execute() function and define variables before and outside of that
function, so the profile file is sourced every time, when creating
initial session and when reattaching to the session again.