Toggle diff (251 lines)
diff --git a/doc/guix.texi b/doc/guix.texi
index 3bf2dee752..dc27b7437e 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -40517,6 +40517,7 @@ services)}.
* Shepherd: Shepherd Home Service. Managing User's Daemons.
* SSH: Secure Shell. Setting up the secure shell client.
* Desktop: Desktop Home Services. Services for graphical environments.
+* Emacs: Emacs Home Service. Service for running Emacs.
* Guix: Guix Home Services. Services for Guix.
@end menu
@c In addition to that Home Services can provide
@@ -41348,6 +41349,56 @@ The package providing the @code{/bin/dbus-daemon} command.
@end table
@end deftp
+@node Emacs Home Service
+@subsection Emacs Home Service
+
+@defvr {Scheme Variable} home-emacs-service-type
+This is the service type for configuring the Emacs text editor and
+running its daemon.
+
+Note that if you have an existing @file{~/.emacs} and/or
+@file{~/.emacs.d}, the configuration aspect of this service will
+not function, as they take precedence over @file{~/.config/emacs},
+which this service uses in the interest of cleanliness. To migrate
+to the XDG directory, run these commands:
+
+@example
+$ cp ~/.emacs.d $XDG_CONFIG_HOME/emacs
+$ cp ~/.emacs $XDG_CONFIG_HOME/emacs/init.el
+@end example
+@end defvr
+
+@deftp {Data Type} home-emacs-configuration
+The configuration record for @code{home-emacs-service-type}.
+
+@table @asis
+@item @code{emacs} (default: @code{emacs})
+The package providing the @file{/bin/emacs} and @file{/bin/emacsclient}
+commands.
+
+@item @code{packages} (default: @code{'()})
+Packages providing Emacs plugins to add to the daemon's load paths.
+
+@item @code{native-compile?} (default: @code{#f})
+Whether to recompile all @code{packages}, using the provided @code{emacs}
+package in place of @code{emacs-minimal}, which will enable native
+compilation if the @code{emacs} package supports it. All
+non-@code{-minimal} Emacs packages at version 28 or above should support
+native compilation.
+
+@item @code{init-file} (default: @code{(plain-file "init.el" "")})
+The file-like to use as @file{init.el}, the main Emacs configuration
+file.
+
+@item @code{early-init-file} (default: @code{(plain-file "early-init.el" "")})
+The file-like to use as @file{early-init.el}, which is loaded early in
+the initialisation process, before the GUI is started.
+
+@item @code{debug?} (default: @code{#f})
+Whether to enable detailed debug log output with backtraces.
+@end table
+@end deftp
+
@node Guix Home Services
@subsection Guix Home Services
diff --git a/gnu/home/services/emacs.scm b/gnu/home/services/emacs.scm
new file mode 100644
index 0000000000..a727a2f246
--- /dev/null
+++ b/gnu/home/services/emacs.scm
@@ -0,0 +1,162 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 ( <paren@disroot.org>
+;;;
+;;; 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu home services emacs)
+ #:use-module (gnu home services)
+ #:use-module (gnu home services shepherd)
+ #:autoload (gnu packages emacs) (emacs-minimal
+ emacs)
+ #:use-module (gnu services configuration)
+ #:use-module (guix gexp)
+ #:use-module (guix packages)
+ #:use-module (guix records)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+
+ #:export (home-emacs-configuration
+ home-emacs-service-type))
+
+(define list-of-file-likes?
+ (list-of file-like?))
+
+(define-configuration/no-serialization home-emacs-configuration
+ (emacs
+ (file-like emacs)
+ "The package providing @file{/bin/emacs}.")
+ (packages
+ (list-of-file-likes '())
+ "Packages to add to the Emacs plugin load path.")
+ (native-compile?
+ (boolean #f)
+ "Whether to compile the @code{packages} using the Emacs package
+provided as the value of the @code{emacs} field, which will enable
+native compilation if the @code{emacs} package supports it.")
+ (init-file
+ (file-like (plain-file "init.el" ""))
+ "File-like to use as the initialisation Lisp file.")
+ (early-init-file
+ (file-like (plain-file "early-init.el" ""))
+ "File-like to use as the pre-initialisation Lisp file.")
+ (debug?
+ (boolean #f)
+ "Whether to enable debugging."))
+
+(define (home-emacs-profile-packages config)
+ (list (home-emacs-configuration-emacs config)))
+
+(define (home-emacs-transformed-packages config)
+ (map (if (home-emacs-configuration-native-compile? config)
+ (package-input-rewriting
+ `((,emacs-minimal
+ . ,(home-emacs-configuration-emacs config))))
+ identity)
+ (let ((packages (home-emacs-configuration-packages config)))
+ (concatenate
+ (cons packages
+ (map (compose (cute map second <>)
+ package-transitive-propagated-inputs)
+ packages))))))
+
+(define (home-emacs-shepherd-services config)
+ (list (shepherd-service
+ (provision '(emacs))
+ (documentation "Start the Emacs daemon.")
+ (modules '((ice-9 ftw)
+ (srfi srfi-1)
+ (srfi srfi-26)))
+ (start
+ #~(make-forkexec-constructor
+ (list #$(file-append
+ (home-emacs-configuration-emacs config)
+ "/bin/emacs")
+ "--fg-daemon" "--eval"
+ (format #f "~s"
+ `(progn
+ (setq custom-file
+ (concat (or (getenv "XDG_CONFIG_HOME")
+ (concat (getenv "HOME")
+ "/.config"))
+ "/emacs/custom.el"))
+ (load custom-file)))
+ #$@(if (home-emacs-configuration-debug? config)
+ (list "--debug-init")
+ '()))
+ #:log-file
+ (format #f "~a/emacs.log"
+ (or (getenv "XDG_LOG_HOME")
+ (format #f "~a/.local/var/log"
+ (getenv "HOME"))))
+ #:environment-variables
+ (let ((env-var
+ (lambda (name path)
+ (define (regular-directory? directory)
+ (not (member directory (list "." ".."))))
+
+ (define (package-paths package)
+ (let ((directory (string-append package "/" path)))
+ (if (file-exists? directory)
+ (cons directory
+ (map (cute string-append directory "/" <>)
+ (scandir directory regular-directory?)))
+ '())))
+
+ (let ((old-value (getenv name)))
+ (string-append
+ name "="
+ (string-join
+ (append-map
+ package-paths
+ (list #$@(home-emacs-transformed-packages config)))
+ ":" (if old-value
+ 'suffix
+ 'infix))
+ (or old-value ""))))))
+ (append (default-environment-variables)
+ (list (env-var "EMACSLOADPATH"
+ "share/emacs/site-lisp")
+ (env-var "EMACSNATIVELOADPATH"
+ "lib/emacs/native-site-lisp"))))))
+ (stop
+ #~(make-forkexec-constructor
+ (list #$(file-append
+ (home-emacs-configuration-emacs config)
+ "/bin/emacsclient")
+ "--eval" "(kill-emacs)"))))))
+
+(define (home-emacs-xdg-configuration-files config)
+ `(("emacs/early-init.el"
+ ,(home-emacs-configuration-early-init-file config))
+ ("emacs/init.el"
+ ,(home-emacs-configuration-init-file config))))
+
+(define home-emacs-service-type
+ (service-type
+ (name 'home-emacs)
+ (extensions
+ (list (service-extension
+ home-profile-service-type
+ home-emacs-profile-packages)
+ (service-extension
+ home-shepherd-service-type
+ home-emacs-shepherd-services)
+ (service-extension
+ home-xdg-configuration-files-service-type
+ home-emacs-xdg-configuration-files)))
+ (default-value (home-emacs-configuration))
+ (description
+ "Configure and run the GNU Emacs extensible text editor.")))
diff --git a/gnu/local.mk b/gnu/local.mk
index 8247180bef..3431c771b8 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -88,6 +88,7 @@ GNU_SYSTEM_MODULES = \
%D%/home/services.scm \
%D%/home/services/desktop.scm \
%D%/home/services/symlink-manager.scm \
+ %D%/home/services/emacs.scm \
%D%/home/services/fontutils.scm \
%D%/home/services/guix.scm \
%D%/home/services/pm.scm \
--
2.38.0
