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A NixOS Plymouth theme displaying a fancy growing and shrinking NixOS Logo

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Warning: Using this repo for some reason bloats the initrd quite a bit (up to 50 MB). Use it with boot.loader.systemd-boot.configurationLimit or a /boot of at least a gigabyte. On EFI Systems it's also possible to keep the initrd on the main partition when switching to Grub. Checkout the nixos wiki.

This repo contains a plymouth theme for Nixos, thanks to discourse for giving me motivation.

Install

The package is currently not in nixpkgs.

Flakes

You can include it in your flakes.nix like this:

{
  inputs.nixos-boot.url = "github:Melkor333/nixos-boot";
  outputs = { self, nixpkgs, nixos-boot }:
  {
    nixosConfigurations."<hostname>" = nixpkgs.lib.nixosSystem {
      modules = [ nixos-boot.nixosModules.default ./configuration.nix ];
      system  = "x86_64-linux";
    };
  };
}

Non Flakes

You can include it in your configuration.nix like this:

{ config, lib, pkgs, ...}:
let
  # Fetch the repository
  nixos-boot-src = pkgs.fetchFromGitHub {
    owner = "Melkor333";
    repo = "nixos-boot";
    rev = "main";
    sha256 = "sha256-Dj8LhVTOrHEnqgONbCEKIEyglO7zQej+KS08faO9NJk=";
  };
in
{
  imports = [ "${nixos-boot-src}/modules.nix" ];
}

Configuration

Enable nixos-boot in your configuration:

{ config, lib, pkgs, ...}:
{
  # ...
  nixos-boot = {
    enable  = true;

    # Different colors
    # bgColor.red   = 100; # 0 - 255
    # bgColor.green = 100; # 0 - 255
    # bgColor.blue  = 100; # 0 - 255

    # If you want to make sure the theme is seen when your computer starts too fast
    # duration = 3; # in seconds
  };
}

Themes

load_unload

The first theme, load & unload:

nixos logo loading and unloading

evil-nixos

The second theme, a spinning logo looking a bit communistic:

nixos logo with communist colors

Adding new themes

  • Create directory under src
  • Copy all files as .png in there
  • copy the src/template.plymouth to src/THEME/THEME.plymouth
    • replace the word THEME with the actual theme
    • adjust the description & Comment
  • copy the src/template.script to src/THEME/THEME.script
    • change the line "image_quantity" to match the amount of pictures
    • Create a gif from the pngs in the folder:
    magick convert -delay 5 -loop 0 -background white $(ls -v *.png) -alpha remove THEME.gif
    
  • Add the new entry to modules.nix
    type = lib.types.enum [ "load_unload" "evil-nixos" "THEME" ];
  • Create a Readme Entry

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A NixOS Plymouth theme displaying a fancy growing and shrinking NixOS Logo

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