Setting primary executable instance

[Tim Johnson]

* Brandon Allbery <allbery.b at gmail.com> [141019 17:20]:
> On Sun, Oct 19, 2014 at 9:05 PM, Tim Johnson <tim at akwebsoft.com> wrote:
> 
> > I've installed emacs 24.
> >
> > If I do
> > which -a emacs
> >
> > I get
> > /opt/local/bin/emacs ## New emacs
> > /usr/bin/emacs       ## Old emacs
> >
> 
> 1. "which" lies a lot. use "type".
> 2. Which one is found depends on a number of things:
>   a. the order of directories in $PATH; earlier ones override later ones.
> (MacPorts install normally puts /opt/local/bin at the front of $PATH.)
>   b. most shells do command hashing of some kind (this is one of the
> reasons that "which" lies, as it usually can't see either the current value
> of $PATH or the command hash in your current shell, whereas "type" is
> required to be a shell builtin that shows what your shell actually
> "knows"); depending on your shell, "hash -r" or "rehash" will force it to
> flush its command hash and see changes in $PATH.
> 
> And no, the port command can't reach into your shell and make it do
> something different automatically, at least not without tricky operations
> that could make it dump core instead. You must do that yourself.
  Good tips. Thanks.

-- 
Tim 
tim at tee jay forty nine dot com or akwebsoft dot com
http://www.akwebsoft.com, http://www.tj49.com