;;; guix-emacs.el --- Emacs packages installed with Guix ;; Copyright © 2014, 2015, 2016 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 'cl-lib) (unless (require 'guix-profiles nil t) (defvar guix-user-profile (expand-file-name "~/.guix-profile"))) (defcustom guix-package-enable-at-startup t "If non-nil, activate Emacs packages installed in a user profile. Set this variable to nil before requiring `guix-emacs' file to avoid loading autoloads of Emacs packages installed in `guix-user-profile'." :type 'boolean :group 'guix) (defvar guix-emacs-autoloads nil "List of the last loaded Emacs autoloads.") (defvar guix-emacs-autoloads-regexp (rx (group (* any) "-autoloads") ".el" (zero-or-one "c") string-end) "Regexp to match Emacs 'autoloads' file.") (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 (directory) "Return a list of Emacs 'autoloads' files in DIRECTORY. The files in the list do not have extensions (.el, .elc)." (cl-remove-duplicates (delq nil (mapcar (lambda (file) (when (string-match guix-emacs-autoloads-regexp file) (match-string 1 file))) (directory-files directory 'full-name nil 'no-sort))) :test #'string=)) (defun guix-emacs-subdirs (directory) "Return list of DIRECTORY subdirectories." (cl-remove-if (lambda (file) (or (string-match-p (rx "/." string-end) file) (string-match-p (rx "/.." string-end) file) (not (file-directory-p file)))) (directory-files directory 'full-name nil 'no-sort))) (defun guix-emacs-directories (&optional profile) "Return the list of directories under PROFILE that contain Emacs packages. This includes both `share/emacs/site-lisp/guix.d/PACKAGE' sub-directories and `share/emacs/site-lisp' itself. If PROFILE is nil, use `guix-user-profile'. Return nil, if Emacs packages are not installed in PROFILE." (let ((root-dir (guix-emacs-directory (or profile guix-user-profile)))) (when (file-directory-p root-dir) (let* ((pkgs-dir (expand-file-name "guix.d" root-dir)) (pkgs-dirs (when (file-directory-p pkgs-dir) (guix-emacs-subdirs pkgs-dir)))) (cons root-dir pkgs-dirs))))) ;;;###autoload (defun guix-emacs-autoload-packages (&rest profiles) "Autoload Emacs packages installed in PROFILES. If PROFILES are not specified, use a default user and system profiles. 'Autoload' means add directories with Emacs packages to `load-path' and load 'autoloads' files matching `guix-emacs-autoloads-regexp'." (interactive (list (if (fboundp 'guix-profile-prompt) (funcall 'guix-profile-prompt) guix-user-profile))) (let ((profiles (or profiles (list "/run/current-system/profile" guix-user-profile)))) (dolist (profile profiles) (let ((dirs (guix-emacs-directories profile))) (when dirs (let* ((autoloads (cl-mapcan #'guix-emacs-find-autoloads dirs)) (new-autoloads (cl-nset-difference autoloads guix-emacs-autoloads :test #'string=))) (dolist (dir dirs) (cl-pushnew (directory-file-name dir) load-path :test #'string=)) (dolist (file new-autoloads) (load file 'noerror)) (setq guix-emacs-autoloads (append new-autoloads guix-emacs-autoloads)))))))) (when guix-package-enable-at-startup (guix-emacs-autoload-packages)) (provide 'guix-emacs) ;;; guix-emacs.el ends here