140 lines
5.4 KiB
EmacsLisp
140 lines
5.4 KiB
EmacsLisp
;;; guix-emacs.el --- Emacs packages installed with Guix
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;; Copyright © 2014, 2015, 2016 Alex Kost <alezost@gmail.com>
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;; This file is part of GNU Guix.
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;; GNU Guix is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Guix is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file provides auxiliary code for working with Emacs packages
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;; installed with Guix.
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;;; Code:
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(require 'cl-lib)
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(unless (require 'guix-profiles nil t)
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(defvar guix-user-profile (expand-file-name "~/.guix-profile")))
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(defcustom guix-package-enable-at-startup t
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"If non-nil, activate Emacs packages installed in a user profile.
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Set this variable to nil before requiring `guix-emacs' file to
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avoid loading autoloads of Emacs packages installed in
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`guix-user-profile'."
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:type 'boolean
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:group 'guix)
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(defcustom guix-emacs-activate-after-operation t
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"Activate Emacs packages after installing.
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If nil, do not load autoloads of the Emacs packages after
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they are successfully installed."
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:type 'boolean
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:group 'guix)
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(defvar guix-emacs-autoloads nil
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"List of the last loaded Emacs autoloads.")
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(defvar guix-emacs-autoloads-regexp
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(rx (group (* any) "-autoloads")
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".el" (zero-or-one "c") string-end)
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"Regexp to match Emacs 'autoloads' file.")
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(defun guix-emacs-directory (&optional profile)
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"Return directory with Emacs packages installed in PROFILE.
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If PROFILE is nil, use `guix-user-profile'."
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(expand-file-name "share/emacs/site-lisp"
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(or profile guix-user-profile)))
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(defun guix-emacs-find-autoloads (directory)
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"Return a list of Emacs 'autoloads' files in DIRECTORY.
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The files in the list do not have extensions (.el, .elc)."
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(cl-remove-duplicates
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(delq nil
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(mapcar (lambda (file)
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(when (string-match guix-emacs-autoloads-regexp file)
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(match-string 1 file)))
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(directory-files directory 'full-name nil 'no-sort)))
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:test #'string=))
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(defun guix-emacs-subdirs (directory)
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"Return list of DIRECTORY subdirectories."
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(cl-remove-if (lambda (file)
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(or (string-match-p (rx "/." string-end) file)
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(string-match-p (rx "/.." string-end) file)
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(not (file-directory-p file))))
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(directory-files directory 'full-name nil 'no-sort)))
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(defun guix-emacs-directories (&optional profile)
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"Return the list of directories under PROFILE that contain Emacs packages.
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This includes both `share/emacs/site-lisp/guix.d/PACKAGE'
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sub-directories and `share/emacs/site-lisp' itself.
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If PROFILE is nil, use `guix-user-profile'.
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Return nil, if Emacs packages are not installed in PROFILE."
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(let ((root-dir (guix-emacs-directory (or profile guix-user-profile))))
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(when (file-directory-p root-dir)
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(let* ((pkgs-dir (expand-file-name "guix.d" root-dir))
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(pkgs-dirs (when (file-directory-p pkgs-dir)
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(guix-emacs-subdirs pkgs-dir))))
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(cons root-dir pkgs-dirs)))))
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;;;###autoload
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(defun guix-emacs-autoload-packages (&rest profiles)
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"Autoload Emacs packages installed in PROFILES.
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If PROFILES are not specified, use `guix-user-profile'.
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'Autoload' means add directories with Emacs packages to
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`load-path' and load 'autoloads' files matching
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`guix-emacs-autoloads-regexp'."
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(interactive (list (if (fboundp 'guix-profile-prompt)
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(funcall 'guix-profile-prompt)
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guix-user-profile)))
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(let ((profiles (or profiles
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(list guix-user-profile))))
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(dolist (profile profiles)
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(let ((dirs (guix-emacs-directories profile)))
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(when dirs
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(let* ((autoloads (cl-mapcan #'guix-emacs-find-autoloads
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dirs))
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(new-autoloads (cl-nset-difference autoloads
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guix-emacs-autoloads
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:test #'string=)))
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(dolist (dir dirs)
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(cl-pushnew (directory-file-name dir)
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load-path
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:test #'string=))
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(dolist (file new-autoloads)
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(load file 'noerror))
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(setq guix-emacs-autoloads
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(append new-autoloads guix-emacs-autoloads))))))))
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(defun guix-emacs-load-autoloads-maybe ()
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"Load autoloads for Emacs packages if needed.
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See `guix-emacs-activate-after-operation' for details."
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(and guix-emacs-activate-after-operation
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;; FIXME Since a user can work with a non-current profile (using
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;; C-u before `guix-search-by-name' and other commands), emacs
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;; packages can be installed to another profile, and the
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;; following code will not work (i.e., the autoloads for this
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;; profile will not be loaded).
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(guix-emacs-autoload-packages guix-current-profile)))
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(when guix-package-enable-at-startup
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(guix-emacs-autoload-packages))
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(provide 'guix-emacs)
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;;; guix-emacs.el ends here
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