Re: Question: loading code when two packages are load?

[Stefan Monnier]

> I’ve been working on the integration of crdt.el with a few other packages 
> (xscheme.el, comint.el).
> Those code only make sense when both crdt.el and the “client” package are 
> loaded.
> Is there a way to lazy load those code?

Some ways to address these kinds of problem:

- Move the relevant code to `crdt-<foo>.el` and then arrange for
  `crdt-<foo>.el` to be loaded when need for example using an autoloaded
  `crdt-<foo>-setup` function and in `crdt.el` you do
  `(add-hook '<foo>-mode-hook 'crdt-<foo>-setup).

- Put the code inside an `with-eval-after-load`.

- Just add enough `defvar`s and `declare-function` to silence the
  warnings.

The first solution above is arguably the cleanest, but can be a too
heavy if the code of `crdt-<foo>.el` is trivial.


        Stefan