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authorLudovic Courtès <ludo@gnu.org>2014-02-19 20:58:24 +0100
committerLudovic Courtès <ludo@gnu.org>2014-02-19 20:58:24 +0100
commitdb4fdc04cc05495788ee54ae25baf8cd056917dc (patch)
tree53532ba52a48e6a8c81e26e5ffbc668906da3596 /gnu/services/dmd.scm
parent7fe492e8d956de17ad2af2ed0d1843a745d06e17 (diff)
downloadguix-db4fdc04cc05495788ee54ae25baf8cd056917dc.tar
guix-db4fdc04cc05495788ee54ae25baf8cd056917dc.tar.gz
gnu: Introduce the (gnu services ...) modules.
* gnu/system/dmd.scm: Remove file. Move contents to... * gnu/services.scm, gnu/services/base.scm, gnu/services/dmd.scm, gnu/services/networking.scm, gnu/services/xorg.scm: ... here. New files. * gnu/system.scm, gnu/system/vm.scm: Adjust accordingly. * guix/scripts/system.scm (%user-module): Likewise. * doc/guix.texi (Using the Configuration System): Likewise. (Defining Services): Likewise.
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.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 services dmd)
+ #:use-module (guix monads)
+ #:use-module (gnu services)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-1)
+ #:export (dmd-configuration-file))
+
+;;; Commentary:
+;;;
+;;; Instantiating system services as a dmd configuration file.
+;;;
+;;; Code:
+
+(define (dmd-configuration-file services etc)
+ "Return the dmd configuration file for SERVICES, that initializes /etc from
+ETC (the name of a directory in the store) on startup."
+ (define config
+ `(begin
+ (use-modules (ice-9 ftw))
+
+ (register-services
+ ,@(map (lambda (service)
+ `(make <service>
+ #:docstring ',(service-documentation service)
+ #:provides ',(service-provision service)
+ #:requires ',(service-requirement service)
+ #:respawn? ',(service-respawn? service)
+ #:start ,(service-start service)
+ #:stop ,(service-stop service)))
+ services))
+
+ ;; /etc is a mixture of static and dynamic settings. Here is where we
+ ;; initialize it from the static part.
+ (format #t "populating /etc from ~a...~%" ,etc)
+ (let ((rm-f (lambda (f)
+ (false-if-exception (delete-file f)))))
+ (rm-f "/etc/static")
+ (symlink ,etc "/etc/static")
+ (for-each (lambda (file)
+ ;; TODO: Handle 'shadow' specially so that changed
+ ;; password aren't lost.
+ (let ((target (string-append "/etc/" file))
+ (source (string-append "/etc/static/" file)))
+ (rm-f target)
+ (symlink source target)))
+ (scandir ,etc
+ (lambda (file)
+ (not (member file '("." ".."))))))
+
+ ;; Prevent ETC from being GC'd.
+ (rm-f "/var/nix/gcroots/etc-directory")
+ (symlink ,etc "/var/nix/gcroots/etc-directory"))
+
+ (format #t "starting services...~%")
+ (for-each start ',(append-map service-provision services))))
+
+ (text-file "dmd.conf" (object->string config)))
+
+;;; dmd.scm ends here