116244df95
Reported by 白い熊 @相撲道 <guix-devel_gnu.org@sumou.com> at <http://lists.gnu.org/archive/html/guix-devel/2015-03/msg00264.html>. * gnu/services/dmd.scm (assert-no-duplicates): New procedure. (dmd-configuration-file): Use it. * po/guix/POTFILES.in: Add gnu/services/dmd.scm. * tests/guix-system.sh (errorfile): Add test.
106 lines
3.8 KiB
Scheme
106 lines
3.8 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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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 dmd)
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#:use-module (guix ui)
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#:use-module (guix sets)
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#:use-module (guix gexp)
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#:use-module (guix store)
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#:use-module (guix monads)
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#:use-module (guix derivations) ;imported-modules, etc.
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#:use-module (gnu services)
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:export (dmd-configuration-file))
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;;; Commentary:
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;;;
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;;; Instantiating system services as a dmd configuration file.
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;;;
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;;; Code:
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(define (assert-no-duplicates services)
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"Raise an error if SERVICES provide the same dmd service more than once.
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This is a constraint that dmd's 'register-service' verifies but we'd better
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verify it here statically than wait until PID 1 halts with an assertion
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failure."
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(fold (lambda (service set)
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(define (assert-unique symbol)
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(when (set-contains? set symbol)
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(raise (condition
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(&message
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(message
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(format #f (_ "service '~a' provided more than once")
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symbol)))))))
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(for-each assert-unique (service-provision service))
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(fold set-insert set (service-provision service)))
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(setq)
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services))
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(define (dmd-configuration-file services)
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"Return the dmd configuration file for SERVICES."
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(define modules
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;; Extra modules visible to dmd.conf.
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'((guix build syscalls)
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(gnu build file-systems)
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(guix build utils)))
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(assert-no-duplicates services)
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(mlet %store-monad ((modules (imported-modules modules))
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(compiled (compiled-modules modules)))
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(define config
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#~(begin
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(eval-when (expand load eval)
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(set! %load-path (cons #$modules %load-path))
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(set! %load-compiled-path
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(cons #$compiled %load-compiled-path)))
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(use-modules (ice-9 ftw)
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(guix build syscalls)
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(guix build utils)
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((gnu build file-systems)
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#:select (check-file-system canonicalize-device-spec)))
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(register-services
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#$@(map (lambda (service)
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#~(make <service>
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#:docstring '#$(service-documentation service)
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#:provides '#$(service-provision service)
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#:requires '#$(service-requirement service)
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#:respawn? '#$(service-respawn? service)
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#:start #$(service-start service)
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#:stop #$(service-stop service)))
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services))
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;; guix-daemon 0.6 aborts if 'PATH' is undefined, so work around it.
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(setenv "PATH" "/run/current-system/profile/bin")
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(format #t "starting services...~%")
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(for-each start
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'#$(append-map service-provision
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(filter service-auto-start? services)))))
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(gexp->file "dmd.conf" config)))
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;;; dmd.scm ends here
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