Re: Autoload plus extra configurations

[Eric]

On May 19, 2:39 pm, Anselm Helbig <anselm.helbig
+news2...@googlemail.com> wrote:
> Hi!
>
>
>
>
>
> > > I'm shifting a bunch of libraries to autoload in order to reduce load
> > > times, and running into an issue with extra configuration for those
> > > autoloaded libraries. Tramp, for instance, is enormous and slow and I
> > > don't use it often. I want to autoload it, but I've also got some
> > > extra configuration that accesses tramp-default-methods and tramp-set-
> > > completion-fuction, which are unavailable until tramp is actually
> > > loaded.
>
> > > Is there a way that I can tuck these configurations inside a hook that
> > > runs only when tramp is actually loaded, or otherwise delay the
> > > evaluation of these configurations until the proper variables and
> > > functions are available?
>
> > I think tramp *is* autoloaded only at the last possible moment in recent
> > Emacs versions.  At least it is autoloaded only when I try to open a
> > file URI that requires tramp here in Emacs 23.X.
>
> > Having said that, please have a look at `eval-after-load'.
>
> > For example, I load a separate lisp source file to configure emacs-w3m
> > in my `~/.emacs' file, but only after the "w3m" module is itself loaded:
>
> >   (eval-after-load "w3m"
> >     '(require 'keramida-w3m))
>
> > A similar Lisp form loads "keramida-erc.el" from my load-path, but only
> > when I explicitly load "erc" by invoking it:
>
> >   (eval-after-load "erc"
> >     '(require 'keramida-erc))
>
> > Yet another form loads my cc-mode customizations and hooks, but only
> > the first time I edit a file that triggers cc-mode to load:
>
> >   (eval-after-load "cc-mode"
> >     '(require 'keramida-cc-extra))
>
> > Note that the Lisp form passed to eval-after-load must be quoted!  If
> > you don't quote it, Emacs will try to evaluate it at the same time
> > before the `eval-after-load' form, which is very unlikely to be the
> > intended result.
>
> Also note that if you've need to execute more than one form you will need a
> progn around them, e.g.
>
>   (eval-after-load "erc"
>     '(progn
>        (erc-update-modules)
>        (erc-nickserv-identify-mode 'nick-change)))

Perfect! Thanks very much to you both, that's just what I was looking
for.

Eric


>
> HTH,
>
> Anselm
>
> --
> Anselm Helbig
> mailto:anselm.helbig+news2...@googlemail.com