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Diffstat (limited to 'gnu/packages/aux-files')
| -rw-r--r-- | gnu/packages/aux-files/emacs/guix-emacs.el | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/gnu/packages/aux-files/emacs/guix-emacs.el b/gnu/packages/aux-files/emacs/guix-emacs.el new file mode 100644 index 0000000000..099261a013 --- /dev/null +++ b/gnu/packages/aux-files/emacs/guix-emacs.el @@ -0,0 +1,123 @@ +;;; 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 |