Re: [ELPA] New package: triples

[Andrew Hyatt <ahyatt@gmail.com>]

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On Thu, Oct 27, 2022 at 11:34 AM Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> > About the possibility of using one or the other, whichever is available,
> how
> > would that work in terms of package dependencies? I don't think it's
> > possible to have an OR dependency specified in the package-dependencies
> > line in the source, but really only one of emacsql or emacs29 would be
> > required.  If you have any insight into this, it'd be useful.
>
> Package dependencies just tell the package manager to install other
> packages to try and make it easier on users to get a working package.
> But you don't need to have a precise/exact description of the
> real dependencies in the `Package-Requires` (as long as the
> correct byte-compilation of your package actually depends on some other
> package, e.g. if your package uses a macro defined in the other package).
>
> You can just remove the `emacsql` dependency from `Package-Requires` and
> replace it with a runtime check for the presence of either `emacsql` or
> the new sqlite support that emits an error when applicable (with
> a message explaining to the user that they need to have one of those two
> thingies before they can use the package).
> [ Just make sure the error is not emitted just because the file(s) from
>   your package are loaded, but only when some code is actually called.  ]
>

This is now done, you can find the new code that can either use emacs 29
builtin sqlite, or emacsql, on a new branch, at
https://github.com/ahyatt/triples/tree/combined.



>
>
>         Stefan
>
>

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