Wroclaw/nixos-configuration
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pkgs/overlays: create, move unstable there

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also in unstable: use nixpkgs option to define
if unstable nixpkgs expressions should be from
nixos or nixpkgs channel
(default true, use nixos channel)
This commit is contained in:
Wroclaw 2024-06-17 07:24:06 +02:00
parent 3b7c1594ac
commit 88f348a2c9
2 changed files with 46 additions and 27 deletions
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37
nix-os/unstable-packages.nix
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@ -1,37 +1,20 @@
{config, pkgs, lib, ...}:
let
nixos-unstable-exprs = builtins.fetchTarball https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz;
nixos-unstable = import nixos-unstable-exprs {
inherit (config.nixpkgs) config localSystem crossSystem;
overlays = if config.unstable.usePkgsOverlays then config.pkgs.overlays else [];
};
nixos-unstable-version = builtins.concatStringsSep "." [
(builtins.readFile "${builtins.toString nixos-unstable-exprs}/.version")
(builtins.readFile "${builtins.toString nixos-unstable-exprs}/.version-suffix")
];
cfg = config.unstable;
unstableOverlay = import ../pkgs/overlays/unstable.nix;
in
{
options.unstable = {
enable = lib.mkEnableOption (lib.mkDoc ''
use of unstable packages in configuration. You can use `unstablePkgs` in configuration modules
'') // { default = true; };
usePkgsOverlays = lib.mkEnableOption (lib.mkDoc ''
use overlays from `nixpkgs.overlays`
'');
pkgs = lib.mkOption {
default = if config.unstable.enable then nixos-unstable else pkgs;
description = lib.mkDoc ''
acts like pkgs, but it has unstable packages if `unstable.enable` is enabled.
You can also use `unstablePkgs` in module arguments.
'';
visible = true;
readOnly = true;
type = lib.types.pkgs;
};
};
config._module.args.unstablePkgs = config.unstable.pkgs;
config.system.extraSystemBuilderCmds = lib.mkIf config.unstable.enable ''
echo ${nixos-unstable-version} > $out/nixos-unstable-version
'';
}
config = {
_module.args.unstablePkgs = if config.unstable.enable then pkgs.unstable else pkgs;
nixpkgs.overlays = lib.mkIf cfg.enable [ unstableOverlay ];
system.extraSystemBuilderCmds = lib.mkIf config.unstable.enable ''
echo ${pkgs.unstableVersion} > $out/nixos-unstable-version
'';
};
}