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README.md: elaborate on project structure
Provide details for contribution and bootstrapping.
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Timothy DeHerrera
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README.md
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README.md
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# Introduction
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This project is under construction as a rewrite of my [legacy][old]
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NixOS configuration, using the [experimental][rfc] _flakes_ mechanism.
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NixOS configuration, using the experimental [flakes][rfc] mechanism.
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#### [Flake Talk][video]
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# Usage
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Enter a nix-shell either manually or automatically using [direnv][direnv]. This
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will set up the exerimental nix features that need to be available to use
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[flakes][pr]. A basic `rebuild` command is included in the shell to replace
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`nixos-rebuild` for now.
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## [setup][pr]:
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```nix
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{
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nix.package = nixFlakes;
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nix.extraOptions = ''
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experimental-features = nix-command flakes
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'';
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}
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```
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Usage: rebuild [host] {switch|boot|test}
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```
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### sans [NixOS][nixos]:
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```
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# nix-env -f '<nixpkgs>' -iA nixFlakes
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You can specify one of the host configurations from the [hosts](hosts)
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directory. If omitted, it will default to your systems current hostname.
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# echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf
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In addtion:
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```
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rebuild iso
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```
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Will make a minimal and bootable iso image of the [niximg](hosts/niximg.nix)
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configuration. You can customize the image by editing this file.
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You can also install the packages declared in [pkgs](pkgs) without needing
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to install NixOS. For example:
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```
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# from top-level
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nix profile install ".#packages.x86_64-linux.purs"
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```
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# Contributing
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The purpose of this repository is to allow for simpler modularity and
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maintainability than was achieved in a previous effort. Flakes, along with a
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standardized structure, make this simple.
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## Hosts
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Distributions for particular machines should be stored in the [hosts](hosts)
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directory. Every file in this directory will be added automatically to the
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available NixOS configurations available in the `nixosConfigurations` flake
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output. See the [`default.nix`](hosts/default.nix) for implementation details.
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## Profiles
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More abstract configurations that can be reused by multiple machines should
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go in the [profiles](profiles) directory. It's structure is pretty straight
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forward. Just have a look to get an idea. Every profile should have a
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`default.nix` to easily import it. You can also stick things in the profile's
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subdirectory which are not automatically imported by its `default.nix` but are
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meant to be manually imported from a host (useful for less common, or
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specialized configurations).
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In addition, profiles can depend on other profiles. For example, The
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[graphical](profiles/graphical) profile depends on [develop](profiles/develop)
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simply by importing it in its [`default.nix`](profiles/graphical/default.nix).
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## Users
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User declaration belongs in the [users](users) directory. Everything related to
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your user should be declared here. For convenience, [home-manager][home-manager]
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is available automatically for home directory setup.
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## Modules and Packages
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All [modules](modules/default.nix) and [pkgs](pkgs/default.nix) are available
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for every configuration automatically. Simply add a `*.nix` file to one of
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these directories declaring your module or package, and update the
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corresponding `default.nix` to point to it. Now you can use your new module or
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install your new package as usual.
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Doing this will also add them to the flake's `nixosModules` or `overlays`
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outputs to import them easily into an external NixOS configuration as well.
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## Pull Requests
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If you'd like to add a package, module, profile or host configuration please
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be sure to format your code with [`nixpkgs-fmt`][nixpkgs-fmt] before
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opening a pull-request. The commit message follows the same semantics as
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[nixpkgs][nixpkgs]. You can use a `#` symbol to specify abiguities. For example,
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`develop#zsh: <rest of commit message>` would tell me that your updating the
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`zsh` configuration living under the `develop` profile.
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# License
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@ -43,8 +95,12 @@ included here, which may be derivative works of the packages to
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which they apply. The aforementioned artifacts are all covered by the
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licenses of the respective packages.
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[rfc]: https://github.com/tweag/rfcs/blob/flakes/rfcs/0049-flakes.md
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[pr]: https://github.com/NixOS/nixpkgs/pull/68897
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[video]: https://www.youtube.com/watch?v=UeBX7Ide5a0
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[direnv]: https://direnv.net
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[home-manager]: https://github.com/nrdxp/home-manager
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[NixOS]: https://nixos.org
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[nixpkgs-fmt]: https://github.com/nix-community/nixpkgs-fmt
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[nixpkgs]: https://github.com/NixOS/nixpkgs
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[old]: https://github.com/nrdxp/nixos
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[pr]: https://github.com/NixOS/nixpkgs/pull/68897
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[rfc]: https://github.com/tweag/rfcs/blob/flakes/rfcs/0049-flakes.md
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[video]: https://www.youtube.com/watch?v=UeBX7Ide5a0
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