Nix ecosystem: Difference between revisions

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detailed information on NixOS development including examples with links to where the development happens, this specifically includes non-technical examples to show that contribution does not have to be code
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|+'''The NixOS core ecosystem stack'''
|+'''The NixOS core ecosystem stack'''
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<div style="font-size: 1.3em; font-weight: bold">NixOS</div>
<div style="font-size: 1.3em; font-weight: bold">NixOS</div>
A Linux distribution and configuration system built using Nixpkgs
A Linux distribution and configuration system built using Nixpkgs.
!
!
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<div style="font-size: 1.3em; font-weight: bold">Nixpkgs</div>
<div style="font-size: 1.3em; font-weight: bold">Nixpkgs</div>
A large, community-maintained repository of packages
A large, community-maintained repository of packages.
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<div style="font-size: 1.3em; font-weight: bold">Hydra</div>
<div style="font-size: 1.3em; font-weight: bold">Hydra</div>
A continuous build system built on Nix
A continuous build system built on Nix.
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<div style="font-size: 1.3em; font-weight: bold">Nix</div>
<div style="font-size: 1.3em; font-weight: bold">Nix</div>
A pure and functional build system
A pure and functional build system.
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== Usage of NixOS ==
== Usage of NixOS ==
Users install the ''NixOS'' distribution on their computers just as any other Linux distribution. They read about packages to install and configuration options in ''Nixpgs'' via https://search.nixos.org and this wiki. They use the ''Nix'' language to declaratively describe in a text file what software packages should be installed and how the system should be configured. They run 2 command line programs in a terminal to transform the system into the described system. They use the system as any other Linux system.
Users install the ''NixOS'' distribution on their computers just as any other Linux distribution. They read about packages to install and configuration options in ''Nixpkgs'' via https://search.nixos.org and this wiki. They use the ''Nix'' language to declaratively describe in a text file what software packages should be installed and how the system should be configured. They run 2 command line programs in a terminal to transform the system into the described system. They use the system as any other Linux system.


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== Development of NixOS ==
== Development of NixOS ==
Developers of ''NixOS'' mainly work on ''Nixpkgs'' to describe in text files in ''Nix'' language how software packages should be build. After peer review these changes are integrated in ''Nixpkgs''. Some of these packages are pre built on ''Hydra'' to reduce the update time for ''NixOS'' users.
Developers of ''NixOS'' mainly work on ''Nixpkgs''. ''NixOS'' development itself is compromised of three large areas as well as some others which are smaller by volume (but no less important). The major ones include packaging, the module system, and documentation. Packaging is done in ''Nixpkgs'' and is not exclusive to ''NixOS'' or even Linux-based platforms. Maintainers of packages which are not exclusive to ''NixOS'' (such as tooling required to run the distribution itself) usually take care of multiple platforms although not strictly required. The module system is the way in which services running on ''NixOS'' are primarily configured. This area stretches from "low-level" configuration such as ''systemd'' unit files or providing custom kernel configuration up to configuration file generation for specific services. The module system is the primary way for users to configure ''NixOS'', and lives in the <code>nixos/</code> subdirector of ''Nixpkgs''. Documentation is largely embedded in packaging and module system data, although free-standing markdown files are also contained in the ''Nixpkgs'' repository. Documentation also includes maintaining the website, Wiki, and other aspects of the wider ecosystem. The first two categories are almost exclusively ''Nix'' language code written in text files, while the latter is a mix of ''Nix'' code, markdown files, and various other formats.
All contributions to ''Nixpkgs'', regardless of whether they affect ''NixOS'' or not, are subject to peer review before being integrated into ''Nixpkgs''. Many packages alongside documentation and supplementary materials such as ISOs or tarballs are pre built on ''Hydra'' to reduce the update time for ''NixOS'' users.
Those three categories are largest by contribution volume, however many maintainers also engage in activities surrounding the NixOS foundation, maintaining the infrastructure on which website, ''Hydra'', and other tools run on, or developing tooling required for NixOS.


{| class="wikitable"
|+ Various examples of ''NixOS'' development along with links.
! Type of development !! Location of Development !! Examples
|-
| Platform Agnostic Packaging || ''Nixpkgs'' || [https://github.com/NixOS/nixpkgs/blob/bf3287dac860542719fe7554e21e686108716879/pkgs/tools/misc/coreutils/default.nix coreutils package], [https://github.com/NixOS/nixpkgs/tree/5fe6820251dfab92c84ff356a7c7c336f8d8490c/pkgs/stdenv ''stdenv'' framework], [https://github.com/NixOS/nixpkgs/blob/5fe6820251dfab92c84ff356a7c7c336f8d8490c/pkgs/applications/office/libreoffice/default.nix Libreoffice package]
|-
| Platform Agnostic Tooling || ''Nixpkgs'' and various repositories || [https://github.com/NixOS/nix upstream/default Nix implementation (CppNix)], [https://github.com/NixOS/hydra ''Hydra'' source code], [https://github.com/NixOS/nixpkgs-merge-bot ''Nixpkgs'' merge bot]
|-
| ''NixOS'' Tooling || mostly ''Nixpkgs'' || [https://github.com/NixOS/nixpkgs/tree/5fe6820251dfab92c84ff356a7c7c336f8d8490c/pkgs/by-name/ni/nixos-rebuild-ng nixos-rebuild-ng source code], [https://github.com/NixOS/nixpkgs/blob/5fe6820251dfab92c84ff356a7c7c336f8d8490c/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix ''NixOS'' Installation ISOs]
|-
| ''NixOS'' Module System || ''Nixpkgs'' || [https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/display-managers/default.nix Display Manager configuration], [https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/databases/mysql.nix MySQL (and derivative) database configuration]
|-
| Infrastructure || || [https://github.com/NixOS/nixos-wiki-infra Infrastructure for this Wiki], [https://github.com/NixOS/infra ''NixOS'' infra]
|-
| Documentation || || [https://wiki.nixos.org This Wiki], [https://github.com/NixOS/nixpkgs/blob/8d92119c540d78599ba208010c722a60958810f4/doc/stdenv/stdenv.chapter.md ''stdenv'' documentation], [https://github.com/NixOS/nixpkgs/blob/master/nixos/doc/manual/configuration/ipv6-config.section.md ''NixOS'' IPv6 configuration] (visible in the [https://nixos.org/manual/nixos/stable/#sec-ipv6 IPv6 section of the ''NixOS'' manual]), [https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md ''Nixpkgs'' Contribution Guidelines]
|-
| Tech Organisation || || [https://github.com/NixOS/nixpkgs/issues/390768 ''NixOS'' RelEng], [https://github.com/NixOS/rfcs/ ''Nix'' and ''NixOS'' RFCs]
|-
| Other || || [https://github.com/NixOS/nixos-artwork ''NixOS'' artwork], [https://discourse.nixos.org/ ''NixOS'' (and related) discourse], [https://github.com/NixOS/foundation ''NixOS Foundation'']
|}
See also: [https://github.com/NixOS/org Nix organisation repository]


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