blob: 557f17d8b3b754f5f55bde10d2a6f28a1ca6af05 (
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
|
/*
Manages the things that are needed for a traditional nix-channel based
configuration to work.
See also
- ./nix.nix
- ./nix-flakes.nix
*/
{ config, lib, ... }:
let
inherit (lib)
mkIf
mkOption
stringAfter
types
;
cfg = config.nix;
in
{
options = {
nix = {
nixPath = mkOption {
type = types.listOf types.str;
default = [
"nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixos"
"nixos-config=/etc/nixos/configuration.nix"
"/nix/var/nix/profiles/per-user/root/channels"
];
description = lib.mdDoc ''
The default Nix expression search path, used by the Nix
evaluator to look up paths enclosed in angle brackets
(e.g. `<nixpkgs>`).
'';
};
};
system = {
defaultChannel = mkOption {
internal = true;
type = types.str;
default = "https://nixos.org/channels/nixos-unstable";
description = lib.mdDoc "Default NixOS channel to which the root user is subscribed.";
};
};
};
config = mkIf cfg.enable {
environment.extraInit =
''
if [ -e "$HOME/.nix-defexpr/channels" ]; then
export NIX_PATH="$HOME/.nix-defexpr/channels''${NIX_PATH:+:$NIX_PATH}"
fi
'';
environment.sessionVariables = {
NIX_PATH = cfg.nixPath;
};
system.activationScripts.nix-channel = stringAfter [ "etc" "users" ]
''
# Subscribe the root user to the NixOS channel by default.
if [ ! -e "/root/.nix-channels" ]; then
echo "${config.system.defaultChannel} nixos" > "/root/.nix-channels"
fi
'';
};
}
|