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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 Sou Bunnbu <iyzsong@gmail.com>
+;;;
+;;; 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 dict)
+ #:use-module (guix gexp)
+ #:use-module (guix records)
+ #:use-module (gnu services)
+ #:use-module (gnu services shepherd)
+ #:use-module (gnu system shadow)
+ #:use-module ((gnu packages admin) #:select (shadow))
+ #:use-module (gnu packages dico)
+ #:use-module (gnu packages dictionaries)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+ #:use-module (ice-9 match)
+ #:export (dicod-service
+ dicod-configuration
+ dicod-database
+ %dicod-database:gcide))
+
+
+;;;
+;;; GNU Dico.
+;;;
+
+(define-record-type* <dicod-configuration>
+ dicod-configuration make-dicod-configuration
+ dicod-configuration?
+ (dico dicod-configuration-dico (default dico))
+ (databases dicod-configuration-databases
+ ;; list of <dicod-database>
+ (default (list %dicod-database:gcide))))
+
+(define-record-type* <dicod-database>
+ dicod-database make-dicod-database
+ dicod-database?
+ (name dicod-database-name)
+ (module dicod-database-module)
+ (options dicod-database-options (default '())))
+
+(define %dicod-database:gcide
+ (dicod-database
+ (name "gcide")
+ (module "gcide")
+ (options (list #~(string-append "dbdir=" #$gcide "/share/gcide")
+ "idxdir=/var/run/dicod"))))
+
+(define %dicod-accounts
+ (list (user-group
+ (name "dicod")
+ (system? #t))
+ (user-account
+ (name "dicod")
+ (group "dicod")
+ (system? #t)
+ (home-directory "/var/empty")
+ (shell #~(string-append #$shadow "/sbin/nologin")))))
+
+(define (dicod-configuration-file config)
+ (define dicod-configuration->text
+ (match-lambda
+ (($ <dicod-configuration> dico databases)
+ (append-map (match-lambda
+ (($ <dicod-database> name module options)
+ `("
+load-module " ,module ";
+database {
+ name \"" ,name "\";
+ handler \"" ,module
+ (string-join (list ,@options) " " 'prefix) "\";
+}\n")))
+ databases))))
+ (apply mixed-text-file "dicod.conf" (dicod-configuration->text config)))
+
+(define %dicod-activation
+ #~(begin
+ (use-modules (guix build utils))
+ (let ((user (getpwnam "dicod"))
+ (rundir "/var/run/dicod"))
+ (mkdir-p rundir)
+ (chown rundir (passwd:uid user) (passwd:gid user)))))
+
+(define (dicod-shepherd-service config)
+ (list (shepherd-service
+ (provision '(dicod))
+ (documentation "Run the dicod daemon.")
+ (start #~(make-forkexec-constructor
+ (list (string-append #$dico "/bin/dicod") "--foreground"
+ (string-append
+ "--config=" #$(dicod-configuration-file config)))
+ #:user "dicod" #:group "dicod"))
+ (stop #~(make-kill-destructor)))))
+
+(define dicod-service-type
+ (service-type
+ (name 'dict)
+ (extensions
+ (list (service-extension account-service-type
+ (const %dicod-accounts))
+ (service-extension activation-service-type
+ (const %dicod-activation))
+ (service-extension shepherd-root-service-type
+ dicod-shepherd-service)))))
+
+(define* (dicod-service #:key (config (dicod-configuration)))
+ "Return a service that runs the @command{dicod} daemon, an implementation
+of DICT server (@pxref{Dicod,,, dico, GNU Dico Manual}).
+
+The optional @var{config} argument specifies the configuration for
+@command{dicod}, which should be a @code{<dicod-configuration>} object, by
+default it serves the GNU Collaborative International Dictonary of English.
+
+You can add @command{open localhost} to your @file{~/.dico} file to make
+@code{localhost} the default server for @command{dico}
+client (@pxref{Initialization File,,, dico, GNU Dico Manual})."
+ (service dicod-service-type config))