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;;; guix-emacs.el --- Emacs packages installed with Guix
;; Copyright © 2014 Alex Kost <alezost@gmail.com>
;; This file is part of GNU Guix.
;; GNU Guix is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Guix is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file provides auxiliary code for working with Emacs packages
;; installed with Guix.
;;; Code:
(require 'guix-profiles)
(defcustom guix-emacs-activate-after-operation t
"Activate Emacs packages after installing.
If nil, do not load autoloads of the Emacs packages after
they are successfully installed."
:type 'boolean
:group 'guix)
(defvar guix-emacs-autoloads nil
"List of the last loaded Emacs autoloads.")
(defun guix-emacs-directory (&optional profile)
"Return directory with Emacs packages installed in PROFILE.
If PROFILE is nil, use `guix-user-profile'."
(expand-file-name "share/emacs/site-lisp"
(or profile guix-user-profile)))
(defun guix-emacs-find-autoloads (&optional profile)
"Return list of autoloads of Emacs packages installed in PROFILE.
If PROFILE is nil, use `guix-user-profile'.
Return nil if there are no emacs packages installed in PROFILE."
(let ((dir (guix-emacs-directory profile)))
(if (file-directory-p dir)
(directory-files dir 'full-name "-autoloads\\.el\\'")
(message "Directory '%s' does not exist." dir)
nil)))
;;;###autoload
(defun guix-emacs-load-autoloads (&optional all)
"Load autoloads for Emacs packages installed in a user profile.
If ALL is nil, activate only those packages that were installed
after the last activation, otherwise activate all Emacs packages
installed in `guix-user-profile'."
(interactive "P")
(let* ((autoloads (guix-emacs-find-autoloads))
(files (if all
autoloads
(cl-nset-difference autoloads guix-emacs-autoloads
:test #'string=))))
(dolist (file files)
(load file 'noerror))
(setq guix-emacs-autoloads autoloads)))
(defun guix-emacs-load-autoloads-maybe ()
"Load autoloads for Emacs packages if needed.
See `guix-emacs-activate-after-operation' for details."
(and guix-emacs-activate-after-operation
(guix-emacs-load-autoloads)))
(provide 'guix-emacs)
;;; guix-emacs.el ends here
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