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1 | ;;; guix-emacs.el --- Emacs packages installed with Guix |
2 | ||
e4e21546 | 3 | ;; Copyright © 2014, 2015, 2016 Alex Kost <alezost@gmail.com> |
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4 | |
5 | ;; This file is part of GNU Guix. | |
6 | ||
7 | ;; GNU Guix is free software; you can redistribute it and/or modify | |
8 | ;; it under the terms of the GNU General Public License as published by | |
9 | ;; the Free Software Foundation, either version 3 of the License, or | |
10 | ;; (at your option) any later version. | |
11 | ||
12 | ;; GNU Guix is distributed in the hope that it will be useful, | |
13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;; GNU General Public License for more details. | |
16 | ||
17 | ;; You should have received a copy of the GNU General Public License | |
18 | ;; along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | ||
20 | ;;; Commentary: | |
21 | ||
22 | ;; This file provides auxiliary code for working with Emacs packages | |
23 | ;; installed with Guix. | |
24 | ||
25 | ;;; Code: | |
26 | ||
6078594b | 27 | (require 'cl-lib) |
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28 | (unless (require 'guix-profiles nil t) |
29 | (defvar guix-user-profile (expand-file-name "~/.guix-profile"))) | |
12f2490a | 30 | |
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31 | (defcustom guix-package-enable-at-startup t |
32 | "If non-nil, activate Emacs packages installed in a user profile. | |
33 | Set this variable to nil before requiring `guix-emacs' file to | |
34 | avoid loading autoloads of Emacs packages installed in | |
35 | `guix-user-profile'." | |
36 | :type 'boolean | |
37 | :group 'guix) | |
38 | ||
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39 | (defcustom guix-emacs-activate-after-operation t |
40 | "Activate Emacs packages after installing. | |
41 | If nil, do not load autoloads of the Emacs packages after | |
42 | they are successfully installed." | |
43 | :type 'boolean | |
44 | :group 'guix) | |
45 | ||
46 | (defvar guix-emacs-autoloads nil | |
47 | "List of the last loaded Emacs autoloads.") | |
48 | ||
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49 | (defvar guix-emacs-autoloads-regexp |
50 | (rx (group (* any) "-autoloads") | |
51 | ".el" (zero-or-one "c") string-end) | |
52 | "Regexp to match Emacs 'autoloads' file.") | |
53 | ||
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54 | (defun guix-emacs-directory (&optional profile) |
55 | "Return directory with Emacs packages installed in PROFILE. | |
56 | If PROFILE is nil, use `guix-user-profile'." | |
57 | (expand-file-name "share/emacs/site-lisp" | |
58 | (or profile guix-user-profile))) | |
59 | ||
77411390 | 60 | (defun guix-emacs-find-autoloads-in-directory (directory) |
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61 | "Return a list of Emacs 'autoloads' files in DIRECTORY. |
62 | The files in the list do not have extensions (.el, .elc)." | |
63 | (cl-remove-duplicates | |
64 | (delq nil | |
65 | (mapcar (lambda (file) | |
66 | (when (string-match guix-emacs-autoloads-regexp file) | |
67 | (match-string 1 file))) | |
68 | (directory-files directory 'full-name nil 'no-sort))) | |
69 | :test #'string=)) | |
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70 | |
71 | (defun guix-emacs-subdirs (directory) | |
72 | "Return list of DIRECTORY subdirectories." | |
73 | (cl-remove-if (lambda (file) | |
74 | (or (string-match-p (rx "/." string-end) file) | |
75 | (string-match-p (rx "/.." string-end) file) | |
76 | (not (file-directory-p file)))) | |
77 | (directory-files directory 'full-name nil 'no-sort))) | |
78 | ||
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79 | (defun guix-emacs-find-autoloads (&optional profile) |
80 | "Return list of autoloads of Emacs packages installed in PROFILE. | |
81 | If PROFILE is nil, use `guix-user-profile'. | |
82 | Return nil if there are no emacs packages installed in PROFILE." | |
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83 | (let ((elisp-root-dir (guix-emacs-directory profile))) |
84 | (if (file-directory-p elisp-root-dir) | |
85 | (let ((elisp-pkgs-dir (expand-file-name "guix.d" elisp-root-dir)) | |
86 | (root-autoloads (guix-emacs-find-autoloads-in-directory | |
87 | elisp-root-dir))) | |
88 | (if (file-directory-p elisp-pkgs-dir) | |
89 | (let ((pkgs-autoloads | |
90 | (cl-mapcan #'guix-emacs-find-autoloads-in-directory | |
91 | (guix-emacs-subdirs elisp-pkgs-dir)))) | |
92 | (append root-autoloads pkgs-autoloads)) | |
93 | root-autoloads)) | |
8c9610be | 94 | (message "Directory '%s' does not exist." elisp-root-dir) |
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95 | nil))) |
96 | ||
97 | ;;;###autoload | |
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98 | (defun guix-emacs-load-autoloads (&optional profile) |
99 | "Load autoloads for Emacs packages installed in PROFILE. | |
100 | If PROFILE is nil, use `guix-user-profile'. | |
101 | Add autoloads directories to `load-path'." | |
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102 | (interactive (list (if (fboundp 'guix-profile-prompt) |
103 | (funcall 'guix-profile-prompt) | |
104 | guix-user-profile))) | |
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105 | (let* ((autoloads (guix-emacs-find-autoloads profile)) |
106 | (new-autoloads (cl-nset-difference autoloads | |
107 | guix-emacs-autoloads | |
108 | :test #'string=))) | |
109 | (dolist (file new-autoloads) | |
110 | (cl-pushnew (directory-file-name (file-name-directory file)) | |
111 | load-path | |
77411390 | 112 | :test #'string=) |
12f2490a | 113 | (load file 'noerror)) |
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114 | (setq guix-emacs-autoloads |
115 | (append new-autoloads guix-emacs-autoloads)))) | |
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116 | |
117 | (defun guix-emacs-load-autoloads-maybe () | |
118 | "Load autoloads for Emacs packages if needed. | |
119 | See `guix-emacs-activate-after-operation' for details." | |
120 | (and guix-emacs-activate-after-operation | |
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121 | ;; FIXME Since a user can work with a non-current profile (using |
122 | ;; C-u before `guix-search-by-name' and other commands), emacs | |
123 | ;; packages can be installed to another profile, and the | |
124 | ;; following code will not work (i.e., the autoloads for this | |
125 | ;; profile will not be loaded). | |
126 | (guix-emacs-load-autoloads guix-current-profile))) | |
12f2490a | 127 | |
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128 | (when guix-package-enable-at-startup |
129 | (add-to-list 'load-path (guix-emacs-directory)) | |
130 | (guix-emacs-load-autoloads)) | |
131 | ||
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132 | (provide 'guix-emacs) |
133 | ||
134 | ;;; guix-emacs.el ends here |