blob: da458a5748401b91230a3f4ba6072e1e6ff98e86 (
plain) (
blame)
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
{ config, lib, options, pkgs, ... }:
let
cfg = config.system.nixos;
opt = options.system.nixos;
inherit (lib)
concatStringsSep mapAttrsToList toLower
literalExpression mkRenamedOptionModule mkDefault mkOption trivial types;
needsEscaping = s: null != builtins.match "[a-zA-Z0-9]+" s;
escapeIfNeccessary = s: if needsEscaping s then s else ''"${lib.escape [ "\$" "\"" "\\" "\`" ] s}"'';
attrsToText = attrs:
concatStringsSep "\n" (
mapAttrsToList (n: v: ''${n}=${escapeIfNeccessary (toString v)}'') attrs
) + "\n";
osReleaseContents = {
NAME = "NixOS";
ID = "nixos";
VERSION = "${cfg.release} (${cfg.codeName})";
VERSION_CODENAME = toLower cfg.codeName;
VERSION_ID = cfg.release;
BUILD_ID = cfg.version;
PRETTY_NAME = "NixOS ${cfg.release} (${cfg.codeName})";
LOGO = "nix-snowflake";
HOME_URL = "https://nixos.org/";
DOCUMENTATION_URL = "https://nixos.org/learn.html";
SUPPORT_URL = "https://nixos.org/community.html";
BUG_REPORT_URL = "https://github.com/NixOS/nixpkgs/issues";
};
initrdReleaseContents = osReleaseContents // {
PRETTY_NAME = "${osReleaseContents.PRETTY_NAME} (Initrd)";
};
initrdRelease = pkgs.writeText "initrd-release" (attrsToText initrdReleaseContents);
in
{
imports = [
(mkRenamedOptionModule [ "system" "nixosVersion" ] [ "system" "nixos" "version" ])
(mkRenamedOptionModule [ "system" "nixosVersionSuffix" ] [ "system" "nixos" "versionSuffix" ])
(mkRenamedOptionModule [ "system" "nixosRevision" ] [ "system" "nixos" "revision" ])
(mkRenamedOptionModule [ "system" "nixosLabel" ] [ "system" "nixos" "label" ])
];
options.system = {
nixos.version = mkOption {
internal = true;
type = types.str;
description = "The full NixOS version (e.g. <literal>16.03.1160.f2d4ee1</literal>).";
};
nixos.release = mkOption {
readOnly = true;
type = types.str;
default = trivial.release;
description = "The NixOS release (e.g. <literal>16.03</literal>).";
};
nixos.versionSuffix = mkOption {
internal = true;
type = types.str;
default = trivial.versionSuffix;
description = "The NixOS version suffix (e.g. <literal>1160.f2d4ee1</literal>).";
};
nixos.revision = mkOption {
internal = true;
type = types.nullOr types.str;
default = trivial.revisionWithDefault null;
description = "The Git revision from which this NixOS configuration was built.";
};
nixos.codeName = mkOption {
readOnly = true;
type = types.str;
default = trivial.codeName;
description = "The NixOS release code name (e.g. <literal>Emu</literal>).";
};
stateVersion = mkOption {
type = types.str;
default = cfg.release;
defaultText = literalExpression "config.${opt.release}";
description = ''
Every once in a while, a new NixOS release may change
configuration defaults in a way incompatible with stateful
data. For instance, if the default version of PostgreSQL
changes, the new version will probably be unable to read your
existing databases. To prevent such breakage, you should set the
value of this option to the NixOS release with which you want
to be compatible. The effect is that NixOS will use
defaults corresponding to the specified release (such as using
an older version of PostgreSQL).
It‘s perfectly fine and recommended to leave this value at the
release version of the first install of this system.
Changing this option will not upgrade your system. In fact it
is meant to stay constant exactly when you upgrade your system.
You should only bump this option, if you are sure that you can
or have migrated all state on your system which is affected
by this option.
'';
};
defaultChannel = mkOption {
internal = true;
type = types.str;
default = "https://nixos.org/channels/nixos-unstable";
description = "Default NixOS channel to which the root user is subscribed.";
};
configurationRevision = mkOption {
type = types.nullOr types.str;
default = null;
description = "The Git revision of the top-level flake from which this configuration was built.";
};
};
config = {
system.nixos = {
# These defaults are set here rather than up there so that
# changing them would not rebuild the manual
version = mkDefault (cfg.release + cfg.versionSuffix);
};
# Generate /etc/os-release. See
# https://www.freedesktop.org/software/systemd/man/os-release.html for the
# format.
environment.etc = {
"lsb-release".text = attrsToText {
LSB_VERSION = "${cfg.release} (${cfg.codeName})";
DISTRIB_ID = "nixos";
DISTRIB_RELEASE = cfg.release;
DISTRIB_CODENAME = toLower cfg.codeName;
DISTRIB_DESCRIPTION = "NixOS ${cfg.release} (${cfg.codeName})";
};
"os-release".text = attrsToText osReleaseContents;
};
boot.initrd.systemd.contents = {
"/etc/os-release".source = initrdRelease;
"/etc/initrd-release".source = initrdRelease;
};
# We have to use `warnings` because when warning in the default of the option
# the warning would also be shown when building the manual since the manual
# has to evaluate the default.
#
# TODO Remove this and drop the default of the option so people are forced to set it.
# Doing this also means fixing the comment in nixos/modules/testing/test-instrumentation.nix
warnings = lib.optional (options.system.stateVersion.highestPrio == (lib.mkOptionDefault { }).priority)
"system.stateVersion is not set, defaulting to ${config.system.stateVersion}. Read why this matters on https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion.";
};
# uses version info nixpkgs, which requires a full nixpkgs path
meta.buildDocsInSandbox = false;
}
|