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35 lines
2.5 KiB
Org Mode
35 lines
2.5 KiB
Org Mode
:PROPERTIES:
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:ID: 963c043e-4972-4b29-8360-223ec3465203
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:END:
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#+title: Nix packages
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#+date: 2021-07-18 21:23:26 +08:00
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#+date_modified: 2021-12-12 23:48:08 +08:00
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#+language: en
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- the most important component managed with [[id:3b3fdcbf-eb40-4c89-81f3-9d937a0be53c][Nix package manager]] are [[id:8f23f862-a19a-4a13-8d8f-69c280a8e072][Nix derivations]]
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- derivations are basically recipes how the Nix build daemon compiles the package
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- most derivations are verbose but we can easily create one with nixpkgs
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- for certain setups such as common conventions for certain programming languages like Rust and Go, nixpkgs has [[https://nixos.org/manual/nixpkgs/unstable/#chap-language-support][environments created for those]];
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different versions may have changes so be sure to go into the appropriate documentation and create packages for a specific channel;
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this is significantly easier with [[id:6873de22-9eac-492c-93a8-6cdf8cbfc0f8][Nix flakes]]
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* Ecosystems
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- while derivations can be interacted with the builtin function =builtins.derivation=, it isn't really recommended since it is very verbose;
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instead, you use =stdenv.mkDerivation= from nixpkgs
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- nixpkgs is the official repository of NixOS containing the standard library extending the [[id:a57e63a7-6daa-4639-910d-c6648df156a3][Nix language]], the largest repository of packages (counting up to 80,000 as of 2021-12-12), and various NixOS modules used to build the system itself
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- nixpkgs contains =stdenv= which is a derivation meant to be a base for other packages
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- stdenv contains base packages that virtually all packages have (inside nixpkgs)
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-
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- =stdenv.mkDerivation= is a convenient way of creating derivations;
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however, it is very abstract and a lot of events happening around it
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- this is a function that accepts a large attribute set
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- it will map its arguments corresponding to a parameter in the final derivation made with =stdenv= (which is a shell script)
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- attributes are usually just variables;
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this is especially prevelant if
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- packages can also set setup hooks (i.e., =setupHook=) that are essentially shell scripts to be added in the final derivation
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- example: [[https://github.com/NixOS/nixpkgs/tree/nixos-21.11/pkgs/development/tools/build-managers/cmake][cmake]], [[https://github.com/NixOS/nixpkgs/tree/nixos-21.11/pkgs/development/libraries/glib][glib]], and [[https://github.com/NixOS/nixpkgs/tree/nixos-21.11/pkgs/development/tools/build-managers][most of the build systems at nixpkgs]]
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