179 lines
6.3 KiB
Scheme
179 lines
6.3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2016 Sou Bunnbu <iyzsong@gmail.com>
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;;; Copyright © 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2017 Huang Ying <huang.ying.caritas@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; 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 (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; 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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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services dict)
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#:use-module (guix gexp)
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#:use-module (guix records)
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#:use-module (gnu services)
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#:use-module (gnu services shepherd)
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#:use-module (gnu system shadow)
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#:use-module ((gnu packages admin) #:select (shadow))
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#:use-module (gnu packages dico)
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#:use-module (gnu packages dictionaries)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 match)
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#:export (dicod-service
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dicod-service-type
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dicod-configuration
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dicod-handler
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dicod-database
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%dicod-database:gcide))
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;;;
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;;; GNU Dico.
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;;;
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(define-record-type* <dicod-configuration>
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dicod-configuration make-dicod-configuration
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dicod-configuration?
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(dico dicod-configuration-dico (default dico))
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(interfaces dicod-configuration-interfaces ;list of strings
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(default '("localhost")))
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(handlers dicod-configuration-handlers ;list of <dicod-handler>
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(default '()))
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(databases dicod-configuration-databases ;list of <dicod-database>
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(default (list %dicod-database:gcide))))
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(define-record-type* <dicod-handler>
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dicod-handler make-dicod-handler
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dicod-handler?
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(name dicod-handler-name)
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(module dicod-handler-module (default #f))
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(options dicod-handler-options (default '())))
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(define-record-type* <dicod-database>
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dicod-database make-dicod-database
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dicod-database?
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(name dicod-database-name)
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(handler dicod-database-handler)
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(complex? dicod-database-complex? (default #f))
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(options dicod-database-options (default '())))
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(define %dicod-database:gcide
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(dicod-database
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(name "gcide")
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(handler "gcide")
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(options (list #~(string-append "dbdir=" #$gcide "/share/gcide")
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"idxdir=/var/run/dicod"))))
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(define %dicod-accounts
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(list (user-group
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(name "dicod")
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(system? #t))
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(user-account
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(name "dicod")
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(group "dicod")
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(system? #t)
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))))
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(define (dicod-configuration-file config)
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(define handler->text
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(match-lambda
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(($ <dicod-handler> name #f '())
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`("
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load-module " ,name ";"))
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(($ <dicod-handler> name #f options)
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(handler->text (dicod-handler
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(name name)
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(module name)
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(options options))))
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(($ <dicod-handler> name module options)
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`("
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load-module " ,name " {
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command \"" ,module (string-join (list ,@options) " " 'prefix) "\";
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}\n"))))
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(define database->text
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(match-lambda
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(($ <dicod-database> name handler #f options)
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(append
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(handler->text (dicod-handler
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(name handler)))
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(database->text (dicod-database
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(name name)
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(handler handler)
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(complex? #t)
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(options options)))))
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(($ <dicod-database> name handler complex? options)
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`("
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database {
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name \"" ,name "\";
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handler \"" ,handler
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(string-join (list ,@options) " " 'prefix) "\";
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}\n"))))
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(define configuration->text
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(match-lambda
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(($ <dicod-configuration> dico (interfaces ...) handlers databases)
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(append `("listen ("
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,(string-join interfaces ", ") ");\n")
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(append-map handler->text handlers)
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(append-map database->text databases)))))
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(apply mixed-text-file "dicod.conf" (configuration->text config)))
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(define %dicod-activation
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#~(begin
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(use-modules (guix build utils))
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(let ((user (getpwnam "dicod"))
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(rundir "/var/run/dicod"))
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(mkdir-p rundir)
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(chown rundir (passwd:uid user) (passwd:gid user)))))
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(define (dicod-shepherd-service config)
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(let ((dicod (file-append (dicod-configuration-dico config)
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"/bin/dicod"))
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(dicod.conf (dicod-configuration-file config)))
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(list (shepherd-service
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(provision '(dicod))
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(documentation "Run the dicod daemon.")
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(start #~(make-forkexec-constructor
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(list #$dicod "--foreground"
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(string-append "--config=" #$dicod.conf))
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#:user "dicod" #:group "dicod"))
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(stop #~(make-kill-destructor))))))
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(define dicod-service-type
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(service-type
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(name 'dict)
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(extensions
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(list (service-extension account-service-type
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(const %dicod-accounts))
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(service-extension activation-service-type
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(const %dicod-activation))
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(service-extension shepherd-root-service-type
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dicod-shepherd-service)))))
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(define* (dicod-service #:key (config (dicod-configuration)))
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"Return a service that runs the @command{dicod} daemon, an implementation
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of DICT server (@pxref{Dicod,,, dico, GNU Dico Manual}).
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The optional @var{config} argument specifies the configuration for
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@command{dicod}, which should be a @code{<dicod-configuration>} object, by
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default it serves the GNU Collaborative International Dictonary of English.
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You can add @command{open localhost} to your @file{~/.dico} file to make
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@code{localhost} the default server for @command{dico}
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client (@pxref{Initialization File,,, dico, GNU Dico Manual})."
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(service dicod-service-type config))
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