presentation-nix-flakes/prezentace.md

marp	class	paginate	footer
true	invert	true	Albert Vala, Filip Kohout, Nix flakes & Nix command

Nix flakes & Nix command

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nix command

• Nove nix cli

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Proc zmena?

• Protoze treba nix-shell se nemel pouzivat na nix-shell -p
• Flake support

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Porovnani

nix-shell -p cowsay nix shell nixpkgs#cowsay

nix eval nix why-depends

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Flakes

Why tho?

• Lockfiles.
• Flake inputs

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Na co flaku pouzit?

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Jak pouzit flakes na system configuraci?

• Flake je jen cast zbytek je v normalnich nix filech
• Zbytek konfigurace bere inputy z flaky.
• Neprijdeme o nic jen mame lock file a moznost flake jako inputu

---

Flake example

{
  description = "NixOS configuration";
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    zen-browser.url = "github:0xc000022070/zen-browser-flake";
  };
  outputs = inputs @ {
    nixpkgs,
    home-manager,
    zen-browser,
    ...
  }: {
    nixosConfigurations = {
      laptop = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./laptop/configuration.nix
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = false;
            home-manager.useUserPackages = true;
            home-manager.extraSpecialArgs = {inherit zen-browser;};
            home-manager.users.albert = import ./modules/home.nix;
          }
        ];
      };
    };
  };
}