239 lines
4.6 KiB
Markdown
239 lines
4.6 KiB
Markdown
---
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marp: true
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class: invert
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paginate: true
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footer: "Albert Vala, Filip Kohout, Nix flakes & Nix command"
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---
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<style>
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@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');
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:root {
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background-color: rgb(10,10,10);
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font-family: Ubuntu, Arial
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}
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h1 {
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color: rgb(87, 175, 246)
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}
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code {
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background-color: rgb(10,10,10)
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}
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header {
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color: rgb(100,100,100)
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}
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footer {
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color: rgb(100,100,100)
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}
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</style>
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# Nix flakes & Nix command
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---
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# Nix Command
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* Nove nix cli
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* Flake support
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---
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# Porovnani
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```shell
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nix-shell -p cowsay #Stare
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nix shell nixpkgs#cowsay #Nove
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nix run nixpkgs#cowsay #Nove
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```
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---
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# Commandy
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| Command | Na |
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| ------------ | ---------------------------------- |
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| flake new | Vytvoreni flaky z template |
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| develop | Build environment shell |
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| shell | temp shell s nejakym programem |
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| config check | Check configu na potencialni chyby |
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| run | Spusti output z flaky |
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---
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# Flakes
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* ## Proc?
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* Lockfiles.
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* Flake inputs
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* ## Na co?
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* Cokoliv.
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---
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# Jak pouzit flakes na system configuraci?
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* Flake je jen cast zbytek je v normalnich nix filech
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* Zbytek konfigurace bere inputy z flaky.
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* Neprijdeme o nic jen mame lock file a moznost flake jako inputu
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---
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# Flake example
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```nix
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{
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description = "NixOS configuration";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
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home-manager.url = "github:nix-community/home-manager";
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home-manager.inputs.nixpkgs.follows = "nixpkgs";
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zen-browser.url = "github:0xc000022070/zen-browser-flake";
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};
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outputs = inputs @ {
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nixpkgs,
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home-manager,
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zen-browser,
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...
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}: {
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nixosConfigurations = {
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laptop = nixpkgs.lib.nixosSystem {
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system = "x86_64-linux";
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modules = [
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./laptop/configuration.nix
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home-manager.nixosModules.home-manager
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{
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home-manager.useGlobalPkgs = false;
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home-manager.useUserPackages = true;
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home-manager.extraSpecialArgs = {inherit zen-browser;};
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home-manager.users.albert = import ./modules/home.nix;
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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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```
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---
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```nix
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{
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zen-browser,
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config,
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pkgs,
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...
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}: {
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home.username = "nixFreak";
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home.homeDirectory = "/home/nixFreak";
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home.stateVersion = "24.05";
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home.packages = with pkgs;
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[
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cowsay
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]
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++ [
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zen-browser.packages."${system}".default
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];
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programs.home-manager.enable = true;
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}
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```
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---
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# Inputs
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* `nix flake metadata --json | jq` - zobrazí vstupy
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* lock aktuální verze
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* `nix flake update` - aktualizace všech vstupů
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* `nix flake update [home-manager]` - aktualizace jednoho vstupu
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* `nix flake show` - zobrazí flake strukturu
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```nix
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
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nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.11";
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nixpkgs-current = "github:nixos/nixpkgs?ref=3058cf84bce1aba7b1820cb24319a171572217ba-dirty";
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}
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```
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---
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# Nixos-rebuild
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* Je to jen bash script
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```shell
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nixos-rebuild --flake
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nh os switch
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```
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```shell
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nix build /etc/nixos#nixosConfigurations.nixos.config.system.build.toplevel \
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&& ./result/bin/switch-to-configuration switch
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```
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---
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# Remote building
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- `nixos-rebuild --target-host nixFreak@192.168.8.32 switch --flake .#default`
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- `--use-remote-sudo`
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- `--build-host` - konfigurace tady
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- `--target-host` - konfigurace tam
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---
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# Virtual machine
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`nix run github:nix-community/nixos-generators -- -c ./flake.nix --flake '#default' -f vm --disk-size 20480`
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---
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# Nix writers
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- Jednoduchý způsob přidávání skriptů v různých programovacích jazycích do
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systému ve flake konfiguraci
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- Rozdíl oproti klasickému `pkgs.writeShellScriptBin`
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- [nixpkgs](https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/writers/scripts.nix) -
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pro všechny možnosti konfigurace skriptů
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- [https://nixos.wiki/wiki/Nix-writers](https://nixos.wiki/wiki/Nix-writers) -
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osekaná wiki
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---
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```nix
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pkgs.writers.writeBash "hello-world-bash" {}
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''
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echo "Hello world!"
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''
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pkgs.writers.writePython3 "hello-world-python" {}
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''
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print("Hello world!")
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''
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pkgs.writers.writeRust "hello-world-rust" {}
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''
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fn main() {
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println!("Hello world!")
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}
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''
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```
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---
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```nix
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pkgs.writers.writePython3 "hello-world-python"
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{
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libraries = [ pkgs.python3Packages.requests ];
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makeWrapperArgs = [
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"--prefix", "PATH", ":", "${pkgs.sl}/bin",
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];
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}
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''
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print("Hello world!")
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''
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```
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