Re: emacs packages

[Pjotr Prins <pjotr.public12@thebird.nl>]

Awesome developments!

On Tue, Jun 16, 2015 at 06:00:44PM +0200, Ludovic Courtès wrote:
> Federico Beffa <beffa@ieee.org> skribis:
> 
> > To be concrete about what I'm proposing, attached you find:
> >
> > - An ELPA package importer
> > - An 'emacs-build-system'
> 
> Sounds very useful to me!
> 
> > There are a lot of Emacs packages. For this reason I would like to
> > propose to prefix them with 'emacs-' as we do with Python, ...
> 
> Sounds good.  I think I prefer ‘emacs-’ to ‘el-’ because that’s probably
> what people expect.
> 
> > To make those packages automatically available in Emacs without the
> > need for any code in the user '.emacs' file, I would suggest to
> > include in our Emacs package site initialization file some custom code
> > (to activate our ELPA emacs packages) such as the one in the attached
> > 'guix-elpa.el' file.
> 
> guix.el already takes care of that (info "(guix) Emacs Initial Setup"),
> so that should be enough.
> 
> Some random comments:
> 
> > ;; Path relative to 'out' where we install ELPA packages.  We avoid the
> > ;; ".../elpa" path as Emacs expects to find the ELPA repository
> > ;; 'archive-contents' file and the archive signature.
> > (define guix-elpa-packages-path "/share/emacs/site-lisp/guix.d")
> 
> Rather %install-suffix (“path” is used exclusively to refer to search
> paths in GNU.)
> 
> > (define* (build #:key outputs inputs #:allow-other-keys)
> >   "Compile .el files."
> >   (let* ((emacs (string-append (assoc-ref inputs "emacs") "/bin/emacs"))
> >          (out (assoc-ref outputs "out"))
> >          (name-ver (store-dir->elpa-name-version out))
> >          (el-dir (string-append out guix-elpa-packages-path "/" name-ver)))
> 
> Please align the lets.  :-)
> 
> >       (fold (lambda (f s)
> >               (and s (zero? (system* emacs "--batch" "-Q" "-L" el-dir
> >                                      "-f" "batch-byte-compile" f))))
> >             #t (find-files "." "\\.el$")))))
> 
> Should probably use ‘emacs-batch-eval’ from (guix build emacs-utils),
> and perhaps define ‘emacs-byte-compile’ there.
> 
> > (define* (copy #:key outputs #:allow-other-keys)
> >   "Copy the package content to the installation directory."
> 
> s/copy/install/ ?
> 
> > ;; from (guix utils).  Should we put it in (guix build utils)?
> > (define (package-name->name+version name)
> >   "Given NAME, a package name like \"foo-0.9.1b\", return two values:
> 
> Yes, should probably be moved to (guix build utils) eventually.
> 
> Thanks for the great initiative!
> 
> Ludo’.
> 

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