Modular, context-aware and aspect-oriented dendritic Nix configurations.
Discussions: https://oeiuwq.zulipchat.com/join/nqp26cd4kngon6mo3ncgnuap/
den.oeiuwq.com
configurations
den
dendritic
nix
aspect
oriented
feat: templates/noflake apps per host to build with nh (#227)
authored by
GitHub
24731d28
4b3f7765
+114
-56
+3
-1
.github/workflows/test.yml
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.github/workflows/test.yml
···
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needs: [approved]
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name: noflake
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runs-on: ubuntu-latest
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env:
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NIX_PATH: "nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz"
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steps:
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- uses: wimpysworld/nothing-but-nix@main
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- uses: cachix/install-nix-action@v31
···
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}
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EOF
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git add templates/noflake/modules/ci-runtime.nix
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- run: cd templates/noflake && nix-build -A flake.nixosConfigurations.igloo.config.system.build.toplevel
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- run: cd templates/noflake && nix-shell . -A den.sh --run 'igloo build'
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minimal:
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needs: [approved]
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name: minimal
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modules/output.nix
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modules/output.nix
···
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{ inputs, lib, ... }:
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if inputs ? flake-parts then
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{ }
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else
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{
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# NOTE: Currently Den needs a top-level attribute where to place configurations,
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# by default it is the `flake` attribute, even if Den uses no flake-parts at all.
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# This definitions has been adapted from https://github.com/hercules-ci/flake-parts
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# project which is licensed with:
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#
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# MIT License
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#
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# Copyright (c) 2021 Hercules CI
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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options.flake = lib.mkOption {
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type = lib.types.submoduleWith {
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modules = [
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{
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freeformType = lib.types.lazyAttrsOf (
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lib.types.unique {
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message = ''
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No option has been declared for this flake output attribute, so its definitions can't be merged automatically.
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Possible solutions:
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- Load a module that defines this flake output attribute
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- Declare an option for this flake output attribute
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- Make sure the output attribute is spelled correctly
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- Define the value only once, with a single definition in a single module
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'';
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} lib.types.raw
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);
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}
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];
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};
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};
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}
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let
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has-flake-parts = inputs ? flake-parts;
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outputOptions.flake = lib.mkOption {
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default = { };
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type = lib.types.submodule { freeformType = lib.types.lazyAttrsOf lib.types.unspecified; };
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};
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in
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{
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options = lib.optionalAttrs (!has-flake-parts) outputOptions;
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}
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templates/noflake/README.md
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templates/noflake/README.md
···
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npins update den # make sure you use latest Den
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```
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This template provides runnable apps for each host/home (see modules/nh.nix)
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```shell
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# default action is `build`
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nix-run . -A den.sh --run igloo
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# you can specify any other action like `switch`, `repl`, `build`, `--help`
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nix-run . -A den.sh --run 'igloo build'
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```
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or
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```shell
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nixos-rebuild build --file . -A flake.nixosConfigurations.igloo
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```
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-3
templates/noflake/modules/den.nix
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templates/noflake/modules/den.nix
···
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{ inputs, ... }:
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{ den, inputs, ... }:
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{
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# we can import this flakeModule even if we dont have flake-parts as input!
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imports = [ inputs.den.flakeModule ];
···
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# tux user on igloo host, using nix-maid
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den.hosts.x86_64-linux.igloo.users.tux.classes = [ "maid" ];
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# tux on iceberg host with NixOS user environment
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den.hosts.x86_64-linux.iceberg.users.tux.classes = [ "user" ];
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# first: `npins add -n darwin github nix-darwin nix-darwin`
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# den.hosts.aarch64-darwin.apple.users.tux.classes = [ "hjem" ];
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# host aspect
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den.aspects.igloo = {
···
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# user aspect
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den.aspects.tux = {
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# user configures host nixos.users.users.tux.isNormalUser.
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# den batteries or your own re-usable aspects
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includes = [ den.provides.define-user ];
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+
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# user configures host <nixos/darwin>.users.users.tux.description
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# Read docs about the `user` class.
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user.isNormalUser = true;
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user.description = "Cute Penguin";
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# user contributes nixos and darwin common config
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os =
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{ pkgs, ... }:
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{
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environment.systemPackages = [ pkgs.hello ];
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};
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# maid class
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maid.file.home.".gitconfig".text = ''
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templates/noflake/modules/nh.nix
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templates/noflake/modules/nh.nix
···
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# Provides shell utilities under `den.sh` for building OS configurations using
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# github:nix-community/nh instead of nixos-rebuild, etc
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{ lib, den, ... }:
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let
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defaultAction = "build";
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denShell =
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pkgs:
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pkgs.mkShell {
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buildInputs = [ pkgs.nh ] ++ (denApps pkgs);
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};
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hosts = lib.concatMap lib.attrValues (lib.attrValues den.hosts);
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homes = lib.concatMap lib.attrValues (lib.attrValues den.homes);
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+
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denApps = pkgs: (map (os pkgs) hosts) ++ (map (hm pkgs) homes);
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+
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os =
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pkgs: host:
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pkgs.writeShellApplication {
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name = host.name;
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runtimeInputs = [ pkgs.nh ];
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text =
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let
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command =
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{
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darwin = "darwin";
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nixos = "os";
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}
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.${host.class};
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attr = lib.concatStringsSep "." ([ "flake" ] ++ host.intoAttr);
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args = lib.concatStringsSep " " [
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"--file"
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"."
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attr
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];
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in
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''
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action="''${1:-${defaultAction}}"
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shift || true
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exec nh ${command} "$action" ${args} "$@"
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'';
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};
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hm =
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pkgs: home:
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pkgs.writeShellApplication {
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name = home.name;
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runtimeInputs = [ pkgs.nh ];
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text =
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let
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attr = lib.concatStringsSep "." ([ "flake" ] ++ home.intoAttr);
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args = lib.concatStringsSep " " [
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"--file"
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"."
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attr
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];
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in
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''
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action="''${1:-${defaultAction}}"
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shift || true
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exec nh home "$action" ${args} "$@"
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'';
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};
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in
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{
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options.den.sh = lib.mkOption {
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description = "Non-flake Den shell environment";
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default = denShell (import <nixpkgs> { });
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};
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}