164 lines
6.2 KiB
Scheme
164 lines
6.2 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2019, 2020, 2021 Oleg Pykhalov <go.wigust@gmail.com>
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;;; Copyright © 2020 Peng Mei Yu <i@pengmeiyu.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 nix)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages bash)
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#:use-module (gnu packages package-management)
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#:use-module (gnu services base)
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#:use-module (gnu services configuration)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services web)
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#:use-module (gnu services)
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#:use-module (gnu system shadow)
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#:use-module (guix gexp)
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#:use-module (guix packages)
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#:use-module (guix records)
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#:use-module (guix store)
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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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#:use-module (ice-9 format)
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#:use-module (guix modules)
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#:export (nix-service-type
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nix-configuration
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nix-configuration?))
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;;; Commentary:
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;;;
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;;; This module provides a service definition for the Nix daemon.
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;;;
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;;; Code:
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(define-record-type* <nix-configuration>
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nix-configuration make-nix-configuration
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nix-configuration?
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(package nix-configuration-package ;file-like
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(default nix))
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(sandbox nix-configuration-sandbox ;boolean
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(default #t))
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(build-directory nix-configuration-build-directory ;string
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(default "/tmp"))
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(build-sandbox-items nix-configuration-build-sandbox-items ;list of strings
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(default '()))
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(extra-config nix-configuration-extra-config ;list of strings
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(default '()))
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(extra-options nix-configuration-extra-options ;list of strings
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(default '())))
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;; Copied from gnu/services/base.scm
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(define* (nix-build-accounts count #:key
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(group "nixbld")
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(shadow shadow))
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"Return a list of COUNT user accounts for Nix build users with the given
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GID."
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(unfold (cut > <> count)
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(lambda (n)
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(user-account
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(name (format #f "nixbld~2,'0d" n))
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(system? #t)
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(group group)
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(supplementary-groups (list group "kvm"))
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(comment (format #f "Nix Build User ~2d" n))
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin"))))
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1+
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1))
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(define (nix-accounts _)
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"Return the user accounts and user groups."
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(cons (user-group
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(name "nixbld")
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(system? #t)
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;; Use a fixed GID so that we can create the store with the right
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;; owner.
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(id 40000))
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(nix-build-accounts 10 #:group "nixbld")))
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(define (nix-activation _)
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;; Return the activation gexp.
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#~(begin
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(use-modules (guix build utils)
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(srfi srfi-26))
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(for-each (cut mkdir-p <>) '("/nix/store" "/nix/var/log"
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"/nix/var/nix/gcroots/per-user"
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"/nix/var/nix/profiles/per-user"))
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(chown "/nix/store"
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(passwd:uid (getpw "root")) (group:gid (getpw "nixbld01")))
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(chmod "/nix/store" #o775)
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(for-each (cut chmod <> #o777) '("/nix/var/nix/profiles"
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"/nix/var/nix/profiles/per-user"))))
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(define nix-service-etc
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(match-lambda
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(($ <nix-configuration> package sandbox build-directory build-sandbox-items extra-config)
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(let ((ref-file (references-file package)))
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`(("nix/nix.conf"
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,(computed-file
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"nix.conf"
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#~(begin
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(use-modules (srfi srfi-26)
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(ice-9 format))
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(with-output-to-file #$output
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(lambda _
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(define internal-sandbox-paths
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(call-with-input-file #$ref-file read))
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(format #t "sandbox = ~a~%" (if #$sandbox "true" "false"))
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;; config.nix captures store file names.
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(format #t "build-sandbox-paths = ~{~a ~}~%"
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(append (list (string-append "/bin/sh=" #$bash-minimal "/bin/sh"))
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internal-sandbox-paths
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'#$build-sandbox-items))
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(for-each (cut display <>) '#$extra-config)))))))))))
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(define nix-shepherd-service
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;; Return a <shepherd-service> for Nix.
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(match-lambda
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(($ <nix-configuration> package _ build-directory _ _ extra-options)
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(list
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(shepherd-service
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(provision '(nix-daemon))
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(documentation "Run nix-daemon.")
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(requirement '())
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(start #~(make-forkexec-constructor
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(list (string-append #$package "/bin/nix-daemon")
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#$@extra-options)
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#:environment-variables
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(list (string-append "TMPDIR=" #$build-directory)
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"PATH=/run/current-system/profile/bin")))
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(respawn? #f)
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(stop #~(make-kill-destructor)))))))
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(define nix-service-type
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(service-type
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(name 'nix)
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(extensions
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(list (service-extension shepherd-root-service-type nix-shepherd-service)
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(service-extension account-service-type nix-accounts)
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(service-extension activation-service-type nix-activation)
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(service-extension etc-service-type nix-service-etc)
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(service-extension profile-service-type
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(compose list nix-configuration-package))))
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(description "Run the Nix daemon.")
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(default-value (nix-configuration))))
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;;; nix.scm ends here
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