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Re: emacs packages
From: |
Federico Beffa |
Subject: |
Re: emacs packages |
Date: |
Wed, 17 Jun 2015 09:42:44 +0200 |
On Tue, Jun 16, 2015 at 6:00 PM, Ludovic Courtès <address@hidden> wrote:
>> - An ELPA package importer
>> - An 'emacs-build-system'
>
> Sounds very useful to me!
Thanks for the interest!
>> 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.
Unfortunately this doesn't work without modification. The reason is
that I follow the emacs package.el strategy to install each ELPA
package in it's own sub-directory. Specifically, I'm installing each
package into ".../site-lisp/guix.d/PACKAGE-NAME-VERSION/". The code
in 'guix.el', however, doesn't look in sub-directories below the
profile's '.../site-lisp'.
Another needed detail is the fact that some package's autoload file
(e.g., the one used by AUCTeX) includes a (require 'XXX) statement,
where XXX is a library file provided by the same package. For this to
work, I need to add the directory with the '.el' files to 'load-path'
before loading the autoload file. Then, some package's autoload file
add themselves to the 'load-path'. Therefore we need to remove the
double entry.
This is (part of) the code that I adapted from Emacs package.el to do that:
(defun guix-package-load-all (dir)
"Activate all packages below DIR. (Adapted from Emacs
'package-activate-1' in 'package.el'.)"
(when (file-directory-p dir)
(dolist (subdir (directory-files dir))
(let ((pkg-dir (expand-file-name subdir dir)))
(when (file-directory-p pkg-dir)
(let* ((pkg-desc (guix-package-load-descriptor pkg-dir))
(name (guix-package-desc-name pkg-desc))
(pkg-file (expand-file-name
(format "%s-autoloads.el" name) pkg-dir)))
(when (file-exists-p pkg-file)
;; For some packages to be properly loaded (e.g.,
;; AUCTeX), they must be on the load-path. However,
;; some packages add themselves to the load-path. Hence
;; the check to avoid duplications.
(push pkg-dir load-path)
(let ((old-lp load-path))
(with-demoted-errors (load pkg-file nil t))
(unless (eq old-lp load-path)
(setq load-path old-lp))))))))))
The reason for using separate sub-directory is to avoid name clashes
(README, ...). Would be nice to adapt the code in guix.el to look into
subdirectories as well.
Regards,
Fede
- emacs packages, Federico Beffa, 2015/06/15
- Re: emacs packages, Mathieu Lirzin, 2015/06/15
- Re: emacs packages, Ludovic Courtès, 2015/06/16
- Re: emacs packages, Ludovic Courtès, 2015/06/19
- Re: emacs packages, Federico Beffa, 2015/06/19
- Re: emacs packages, Ludovic Courtès, 2015/06/21
- Re: emacs packages, Federico Beffa, 2015/06/22
- Re: emacs packages, Ludovic Courtès, 2015/06/22
- Re: emacs packages, Federico Beffa, 2015/06/23
- Re: emacs packages, Ludovic Courtès, 2015/06/23