1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019, 2020 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2020 Peng Mei Yu <i@pengmeiyu.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 nix)
#:use-module (gnu packages admin)
#:use-module (gnu packages package-management)
#:use-module (gnu services base)
#:use-module (gnu services configuration)
#:use-module (gnu services shepherd)
#:use-module (gnu services web)
#:use-module (gnu services)
#:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module (guix records)
#:use-module (guix store)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:use-module (guix modules)
#:export (nix-service-type
nix-configuration
nix-configuration?))
;;; Commentary:
;;;
;;; This module provides a service definition for the Nix daemon.
;;;
;;; Code:
(define-record-type* <nix-configuration>
nix-configuration make-nix-configuration
nix-configuration?
(package nix-configuration-package ;package
(default nix))
(sandbox nix-configuration-sandbox ;boolean
(default #t))
(extra-config nix-configuration-extra-config ;list of strings
(default '()))
(extra-options nix-configuration-extra-options ;list of strings
(default '())))
;; Copied from gnu/services/base.scm
(define* (nix-build-accounts count #:key
(group "nixbld")
(shadow shadow))
"Return a list of COUNT user accounts for Nix build users with the given
GID."
(unfold (cut > <> count)
(lambda (n)
(user-account
(name (format #f "nixbld~2,'0d" n))
(system? #t)
(group group)
(supplementary-groups (list group "kvm"))
(comment (format #f "Nix Build User ~2d" n))
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin"))))
1+
1))
(define (nix-accounts _)
"Return the user accounts and user groups."
(cons (user-group
(name "nixbld")
(system? #t)
;; Use a fixed GID so that we can create the store with the right
;; owner.
(id 40000))
(nix-build-accounts 10 #:group "nixbld")))
(define (nix-activation _)
;; Return the activation gexp.
#~(begin
(use-modules (guix build utils)
(srfi srfi-26))
(for-each (cut mkdir-p <>) '("/nix/store" "/nix/var/log"
"/nix/var/nix/gcroots/per-user"
"/nix/var/nix/profiles/per-user"))
(chown "/nix/store"
(passwd:uid (getpw "root")) (group:gid (getpw "nixbld01")))
(chmod "/nix/store" #o775)
(for-each (cut chmod <> #o777) '("/nix/var/nix/profiles"
"/nix/var/nix/profiles/per-user"))))
(define nix-service-etc
(match-lambda
(($ <nix-configuration> package sandbox build-sandbox-items extra-config)
`(("nix/nix.conf"
,(computed-file
"nix.conf"
#~(begin
(use-modules (srfi srfi-26)
(ice-9 format))
(with-output-to-file #$output
(lambda _
(format #t "sandbox = ~a~%" (if #$sandbox "true" "false"))
(for-each (cut display <>) '#$extra-config))))))))))
(define nix-shepherd-service
;; Return a <shepherd-service> for Nix.
(match-lambda
(($ <nix-configuration> package _ _ _ extra-options)
(list
(shepherd-service
(provision '(nix-daemon))
(documentation "Run nix-daemon.")
(requirement '())
(start #~(make-forkexec-constructor
(list (string-append #$package "/bin/nix-daemon")
#$@extra-options)))
(respawn? #f)
(stop #~(make-kill-destructor)))))))
(define nix-service-type
(service-type
(name 'nix)
(extensions
(list (service-extension shepherd-root-service-type nix-shepherd-service)
(service-extension account-service-type nix-accounts)
(service-extension activation-service-type nix-activation)
(service-extension etc-service-type nix-service-etc)
(service-extension profile-service-type
(compose list nix-configuration-package))))
(description "Run the Nix daemon.")
(default-value (nix-configuration))))
;;; nix.scm ends here
|