82 lines
1.6 KiB
Markdown
82 lines
1.6 KiB
Markdown
---
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marp: true
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---
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# NixOS
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## Build your own ISO image from flake
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```shell
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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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---
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## Nix writers
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- Jednoduchý způsob přidávání skriptů v různých programovacích jazycích do systému
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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) - pro všechny možnosti konfigurace skriptů
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- [https://nixos.wiki/wiki/Nix-writers](https://nixos.wiki/wiki/Nix-writers) - 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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---
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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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