84d4358635
Nix 1.6 (accidentally) changed the semantics of strings like
"${path}/bla", so this happened to work on 1.6 but not before.
57 lines
1.5 KiB
Nix
57 lines
1.5 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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{
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options = {
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system.nixosVersion = mkOption {
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type = types.uniq types.string;
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description = "NixOS version.";
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};
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system.nixosVersionSuffix = mkOption {
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type = types.uniq types.string;
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description = "NixOS version suffix.";
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};
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system.nixosCodeName = mkOption {
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type = types.uniq types.string;
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description = "NixOS release code name.";
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};
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};
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config = {
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system.nixosVersion =
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mkDefault (builtins.readFile "${toString pkgs.path}/.version" + config.system.nixosVersionSuffix);
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system.nixosVersionSuffix =
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let suffixFile = "${toString pkgs.path}/.version-suffix"; in
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mkDefault (if builtins.pathExists suffixFile then builtins.readFile suffixFile else "pre-git");
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# Note: code names must only increase in alphabetical order.
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system.nixosCodeName = "Aardvark";
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# Generate /etc/os-release. See
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# http://0pointer.de/public/systemd-man/os-release.html for the
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# format.
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environment.etc = singleton
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{ source = pkgs.writeText "os-release"
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''
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NAME=NixOS
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ID=nixos
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VERSION="${config.system.nixosVersion} (${config.system.nixosCodeName})"
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VERSION_ID="${config.system.nixosVersion}"
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PRETTY_NAME="NixOS ${config.system.nixosVersion} (${config.system.nixosCodeName})"
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HOME_URL="http://nixos.org/"
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'';
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target = "os-release";
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};
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};
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}
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