Adding 'usernixos', where I start a modular kind-of-nixos that can go into
"nix-env -i" profiles, as a container for flexible configuration at the style of nixos, to be defined in .nixpkgs/config.nix, with the main target of generating an activation script. svn path=/nixpkgs/trunk/; revision=33445
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26
pkgs/build-support/usernixos/activation.nix
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26
pkgs/build-support/usernixos/activation.nix
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@ -0,0 +1,26 @@
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{ pkgs, config, ... }:
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let
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script = pkgs.writeScriptBin "usernixos" (''
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#!${pkgs.bash}/bin/bash
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'' + config.activationContents);
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in
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with pkgs.lib;
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{
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options = {
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activation = mkOption {
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default = {};
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};
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activationContents = mkOption {
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default = "";
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internal = true;
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merge = concatStringsSep "\n";
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description = ''
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Commands to run at activation
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'';
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};
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};
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config.activation.toplevel = script;
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}
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59
pkgs/build-support/usernixos/bashrc.nix
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59
pkgs/build-support/usernixos/bashrc.nix
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@ -0,0 +1,59 @@
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# Generator for .bashrc
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{pkgs, config, ...}:
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with pkgs.lib;
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let
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bashrcFile = pkgs.writeScript "bashrc" config.bashrc.contents;
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cfg = config.bashrc;
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in
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{
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options = {
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environment.editor = mkOption {
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default = "${pkgs.vim}/bin/vim";
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type = types.string;
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description = ''
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Editor
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'';
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};
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bashrc = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable of .bashrc generation on activation
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'';
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};
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destination = mkOption {
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default = "~/.bashrc";
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type = types.string;
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description = ''
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The symlink that will point to the generated bashrc at activation time
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'';
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};
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contents = mkOption {
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default = "";
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type = types.string;
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merge = concatStringsSep "\n";
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description = ''
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Enable of .bashrc generation on activation
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'';
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};
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};
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};
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config.bashrc.contents = ''
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export EDITOR="${config.environment.editor}"
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'';
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config.activationContents = mkIf cfg.enable ''
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if [ -e "${cfg.destination}" ]; then
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echo Cannot set "${cfg.destination}", it exists
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exit 1
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fi
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ln -sf ${bashrcFile} "${cfg.destination}"
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'';
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}
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31
pkgs/build-support/usernixos/eval-config.nix
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31
pkgs/build-support/usernixos/eval-config.nix
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{ system ? builtins.currentSystem
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, pkgs ? null
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, baseModules ? import ./module-list.nix
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, extraArgs ? {}
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, modules
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}:
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let extraArgs_ = extraArgs; pkgs_ = pkgs; system_ = system; in
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rec {
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# These are the NixOS modules that constitute the system configuration.
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configComponents = modules ++ baseModules;
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# Merge the option definitions in all modules, forming the full
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# system configuration. It's not checked for undeclared options.
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systemModule =
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pkgs.lib.fixMergeModules configComponents extraArgs;
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optionDefinitions = systemModule.config;
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optionDeclarations = systemModule.options;
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inherit (systemModule) options;
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# These are the extra arguments passed to every module. In
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# particular, Nixpkgs is passed through the "pkgs" argument.
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extraArgs = extraArgs_ // {
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inherit pkgs modules baseModules;
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};
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config = systemModule.config;
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}
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4
pkgs/build-support/usernixos/module-list.nix
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4
pkgs/build-support/usernixos/module-list.nix
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[
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./activation.nix
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./bashrc.nix
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]
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inherit pkgs lib;
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};
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usernixos = let
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configmodule = getConfig [ "usernixos" ] null;
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eval = (import ../build-support/usernixos/eval-config.nix) {
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inherit pkgs system;
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modules = [ configmodule ];
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};
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in
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assert configmodule != null;
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eval.config.activation.toplevel;
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platforms = import ./platforms.nix;
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