readme: move example to flake template

Replace inline flake.nix example with a proper flake template that users
can instantiate with `nix flake init`. This makes it easier to get
started and we can easier test the example.
This commit is contained in:
Jörg Thalheim 2025-12-15 16:12:53 +01:00
parent fb53769c7a
commit 2d721419e6
3 changed files with 148 additions and 104 deletions

View file

@ -23,91 +23,16 @@ nix run '.#munix' -- testvm fastfetch
**Create a custom VM:** **Create a custom VM:**
Create a `flake.nix` in a new directory using this flake as an input providing the necessary NixOS module: Use the template to bootstrap a new munix project:
```nix ```bash
{ mkdir my-vm && cd my-vm
inputs = { nix flake init -t 'git+https://git.clan.lol/clan/munix#musictest'
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; git init && git add flake.nix
munix.url = "git+https://git.clan.lol/clan/munix?shallow=1&ref=main"; nix run
munix.inputs.nixpkgs.follows = "nixpkgs";
};
outputs = { self, nixpkgs, munix, ... }: {
# First, define system configuration in a module:
nixosModules.musictest = { pkgs, ... }: {
system.stateVersion = "26.05";
programs.dconf.enable = true;
fonts.packages = with pkgs; [ adwaita-fonts ];
environment.systemPackages = with pkgs; [ euphonica ];
# Local background service as a demo that doesn't require network creds :)
services.mpd = {
enable = true;
startWhenNeeded = true;
musicDirectory = "/etc/demo-music";
user = "appvm";
group = "appvm";
extraConfig = ''
audio_output {
type "pipewire"
name "Pipewire Output"
}
'';
};
environment.etc."demo-music/0101GhostsI.ogg".source = pkgs.fetchurl {
# just a CC-BY-SA licensed example
url = "https://archive.org/download/NineInchNailsGhostsI-Iv24bit48khz/0101GhostsI.ogg";
sha256 = "0iijm1c191aqkxybl4a4gvlpnf72hk4896lwvp0xixkhds88qzxi";
};
};
# And then define system closures per arch using the module above:
nixosConfigurations.musictest-aarch64 = nixpkgs.lib.nixosSystem {
system = "aarch64-linux";
modules = [
munix.nixosModules.default
self.nixosModules.musictest
];
};
nixosConfigurations.musictest-x86_64 = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
munix.nixosModules.default
self.nixosModules.musictest
];
};
apps.aarch64-linux.default = {
type = "app";
program = "${nixpkgs.legacyPackages.aarch64-linux.symlinkJoin {
name = "munix";
paths = [ munix.packages.aarch64-linux.munix ];
buildInputs = [ nixpkgs.legacyPackages.aarch64-linux.makeWrapper ];
postBuild = ''
wrapProgram $out/bin/munix --add-flags ${self.nixosConfigurations.musictest-aarch64.config.system.build.toplevel} --set MICROVM_DEFAULT_COMMAND euphonica
'';
}}/bin/munix";
meta.description = "Run Music Demo App";
};
apps.x86_64-linux.default = {
type = "app";
program = "${nixpkgs.legacyPackages.x86_64-linux.symlinkJoin {
name = "munix";
paths = [ munix.packages.x86_64-linux.munix ];
buildInputs = [ nixpkgs.legacyPackages.x86_64-linux.makeWrapper ];
postBuild = ''
wrapProgram $out/bin/munix --add-flags ${self.nixosConfigurations.musictest-x86_64.config.system.build.toplevel} --set MICROVM_DEFAULT_COMMAND euphonica
'';
}}/bin/munix";
meta.description = "Run Music Demo App";
};
};
}
``` ```
And `nix run`! This creates a `flake.nix` with a music player demo (MPD + Euphonica). Edit the module to customize your VM.
(TODO: helpers will be provided to reduce the necessary boilerplate)
## munix Options ## munix Options

View file

@ -27,34 +27,56 @@
}; };
}; };
outputs = { self, nixpkgs, flake-utils, virtwl, sidebus, muvm-src, libkrun-src, libkrunfw-src, ... }: { outputs =
nixosModules.testvm = nixpkgs.lib.modules.importApply ./nixosModules/testvm.nix { inherit virtwl; }; {
nixosModules.default = nixpkgs.lib.modules.importApply ./nixosModules/default.nix { inherit self virtwl sidebus; }; self,
nixpkgs,
flake-utils,
virtwl,
sidebus,
muvm-src,
libkrun-src,
libkrunfw-src,
...
}:
{
nixosModules.testvm = nixpkgs.lib.modules.importApply ./nixosModules/testvm.nix { inherit virtwl; };
nixosModules.default = nixpkgs.lib.modules.importApply ./nixosModules/default.nix {
inherit self virtwl sidebus;
};
nixosConfigurations.testvm-x86_64 = nixpkgs.lib.nixosSystem { templates.musictest = {
system = "x86_64-linux"; description = "Music player demo VM with MPD and Euphonica";
modules = [ path = ./templates/musictest;
self.nixosModules.default };
self.nixosModules.testvm
{ nixpkgs.config.allowUnfree = true; }
];
};
nixosConfigurations.testvm-aarch64 = nixpkgs.lib.nixosSystem { nixosConfigurations.testvm-x86_64 = nixpkgs.lib.nixosSystem {
system = "aarch64-linux"; system = "x86_64-linux";
modules = [ modules = [
self.nixosModules.default self.nixosModules.default
self.nixosModules.testvm self.nixosModules.testvm
{ nixpkgs.config.allowUnfree = true; } { nixpkgs.config.allowUnfree = true; }
]; ];
}; };
} // flake-utils.lib.eachSystem [ "x86_64-linux" "aarch64-linux" ] (system:
nixosConfigurations.testvm-aarch64 = nixpkgs.lib.nixosSystem {
system = "aarch64-linux";
modules = [
self.nixosModules.default
self.nixosModules.testvm
{ nixpkgs.config.allowUnfree = true; }
];
};
}
// flake-utils.lib.eachSystem [ "x86_64-linux" "aarch64-linux" ] (
system:
let let
pkgs = import nixpkgs { pkgs = import nixpkgs {
inherit system; inherit system;
config.allowUnfree = true; config.allowUnfree = true;
}; };
in { in
{
checks = checks =
(pkgs.lib.mapAttrs' (n: pkgs.lib.nameValuePair "package-${n}") self.packages.${system}) (pkgs.lib.mapAttrs' (n: pkgs.lib.nameValuePair "package-${n}") self.packages.${system})
@ -99,5 +121,6 @@
muvm = self.packages.${system}.muvm; muvm = self.packages.${system}.muvm;
sidebus-broker = sidebus.packages.${system}.sidebus-broker; sidebus-broker = sidebus.packages.${system}.sidebus-broker;
}; };
}); }
);
} }

View file

@ -0,0 +1,96 @@
{
nixConfig = {
extra-substituters = [ "https://cache.clan.lol" ];
extra-trusted-public-keys = [
"cache.clan.lol-1:3KztgSAB5R1M+Dz7vzkBGzXdodizbgLXGXKXlcQLA28="
];
};
inputs = {
munix.url = "git+https://git.clan.lol/clan/munix?shallow=1&ref=main";
nixpkgs.follows = "munix/nixpkgs";
};
outputs =
{
self,
nixpkgs,
munix,
...
}:
{
# First, define system configuration in a module:
nixosModules.musictest =
{ pkgs, ... }:
{
system.stateVersion = "26.05";
programs.dconf.enable = true;
fonts.packages = with pkgs; [ adwaita-fonts ];
environment.systemPackages = with pkgs; [ euphonica ];
# Local background service as a demo that doesn't require network creds :)
services.mpd = {
enable = true;
startWhenNeeded = true;
musicDirectory = "/etc/demo-music";
user = "appvm";
group = "appvm";
extraConfig = ''
audio_output {
type "pipewire"
name "Pipewire Output"
}
'';
};
environment.etc."demo-music/0101GhostsI.ogg".source = pkgs.fetchurl {
# just a CC-BY-SA licensed example
url = "https://archive.org/download/NineInchNailsGhostsI-Iv24bit48khz/0101GhostsI.ogg";
sha256 = "0iijm1c191aqkxybl4a4gvlpnf72hk4896lwvp0xixkhds88qzxi";
};
};
# And then define system closures per arch using the module above:
nixosConfigurations.musictest-aarch64 = nixpkgs.lib.nixosSystem {
system = "aarch64-linux";
modules = [
munix.nixosModules.default
self.nixosModules.musictest
];
};
nixosConfigurations.musictest-x86_64 = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
munix.nixosModules.default
self.nixosModules.musictest
];
};
apps.aarch64-linux.default = {
type = "app";
program = "${
nixpkgs.legacyPackages.aarch64-linux.symlinkJoin {
name = "munix";
paths = [ munix.packages.aarch64-linux.munix ];
buildInputs = [ nixpkgs.legacyPackages.aarch64-linux.makeWrapper ];
postBuild = ''
wrapProgram $out/bin/munix --add-flags ${self.nixosConfigurations.musictest-aarch64.config.system.build.toplevel} --set MICROVM_DEFAULT_COMMAND euphonica
'';
}
}/bin/munix";
meta.description = "Run Music Demo App";
};
apps.x86_64-linux.default = {
type = "app";
program = "${
nixpkgs.legacyPackages.x86_64-linux.symlinkJoin {
name = "munix";
paths = [ munix.packages.x86_64-linux.munix ];
buildInputs = [ nixpkgs.legacyPackages.x86_64-linux.makeWrapper ];
postBuild = ''
wrapProgram $out/bin/munix --add-flags ${self.nixosConfigurations.musictest-x86_64.config.system.build.toplevel} --set MICROVM_DEFAULT_COMMAND euphonica
'';
}
}/bin/munix";
meta.description = "Run Music Demo App";
};
};
}