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Check the environment profile so that we autoload packages that are given as arguments to "guix environment" but are not in the system or user profile. Note that the union of Emacs packages in the system, user, and environment profiles will be autoloaded even when --pure was passed to "guix environment", because it's not clear how to detect that --pure was given. * gnu/packages/aux-files/emacs/guix-emacs.el (guix-emacs-autoload-packages): Add Emacs packages from GUIX_ENVIRONMENT profile. Signed-off-by: Alex Kost <alezost@gmail.com>
115 lines
4.5 KiB
EmacsLisp
115 lines
4.5 KiB
EmacsLisp
;;; guix-emacs.el --- Emacs packages installed with Guix
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;; Copyright © 2014, 2015, 2016, 2017 Alex Kost <alezost@gmail.com>
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;; Copyright © 2017 Kyle Meyer <kyle@kyleam.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 to autoload 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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(defvar guix-user-profile (expand-file-name "~/.guix-profile"))
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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 a default user and system
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profiles.
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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-read-package-profile)
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(funcall 'guix-read-package-profile)
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guix-user-profile)))
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(let* ((env (getenv "GUIX_ENVIRONMENT"))
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(profiles (or profiles
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(append (list "/run/current-system/profile"
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guix-user-profile)
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(and env (list env))))))
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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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(provide 'guix-emacs)
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;;; guix-emacs.el ends here
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