116 lines
4.8 KiB
Nix
116 lines
4.8 KiB
Nix
# Experimental flake interface to Nixpkgs.
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# See https://github.com/NixOS/rfcs/pull/49 for details.
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{
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description = "A collection of packages for the Nix package manager";
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outputs = { self }:
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let
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libVersionInfoOverlay = import ./lib/flake-version-info.nix self;
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lib = (import ./lib).extend libVersionInfoOverlay;
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forAllSystems = lib.genAttrs lib.systems.flakeExposed;
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jobs = forAllSystems (system: import ./pkgs/top-level/release.nix {
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nixpkgs = self;
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inherit system;
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});
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in
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{
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lib = lib.extend (final: prev: {
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nixos = import ./nixos/lib { lib = final; };
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nixosSystem = args:
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import ./nixos/lib/eval-config.nix (
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{
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lib = final;
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# Allow system to be set modularly in nixpkgs.system.
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# We set it to null, to remove the "legacy" entrypoint's
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# non-hermetic default.
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system = null;
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modules = args.modules ++ [
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# This module is injected here since it exposes the nixpkgs self-path in as
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# constrained of contexts as possible to avoid more things depending on it and
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# introducing unnecessary potential fragility to changes in flakes itself.
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#
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# See: failed attempt to make pkgs.path not copy when using flakes:
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# https://github.com/NixOS/nixpkgs/pull/153594#issuecomment-1023287913
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({ config, pkgs, lib, ... }: {
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config.nixpkgs.flake.source = self.outPath;
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})
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];
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} // builtins.removeAttrs args [ "modules" ]
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);
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});
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checks = forAllSystems (system: {
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tarball = jobs.${system}.tarball;
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# Exclude power64 due to "libressl is not available on the requested hostPlatform" with hostPlatform being power64
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} // lib.optionalAttrs (self.legacyPackages.${system}.stdenv.hostPlatform.isLinux && !self.legacyPackages.${system}.targetPlatform.isPower64) {
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# Test that ensures that the nixosSystem function can accept a lib argument
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# Note: prefer not to extend or modify `lib`, especially if you want to share reusable modules
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# alternatives include: `import` a file, or put a custom library in an option or in `_module.args.<libname>`
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nixosSystemAcceptsLib = (self.lib.nixosSystem {
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pkgs = self.legacyPackages.${system};
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lib = self.lib.extend (final: prev: {
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ifThisFunctionIsMissingTheTestFails = final.id;
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});
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modules = [
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./nixos/modules/profiles/minimal.nix
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({ lib, ... }: lib.ifThisFunctionIsMissingTheTestFails {
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# Define a minimal config without eval warnings
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nixpkgs.hostPlatform = "x86_64-linux";
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boot.loader.grub.enable = false;
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fileSystems."/".device = "nodev";
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# See https://search.nixos.org/options?show=system.stateVersion&query=stateversion
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system.stateVersion = lib.trivial.release; # DON'T do this in real configs!
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})
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];
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}).config.system.build.toplevel;
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});
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htmlDocs = {
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nixpkgsManual = builtins.mapAttrs (_: jobSet: jobSet.manual) jobs;
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nixosManual = (import ./nixos/release-small.nix {
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nixpkgs = self;
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}).nixos.manual;
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};
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devShells = forAllSystems (system: {
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default = import ./shell.nix { inherit system; };
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});
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# The "legacy" in `legacyPackages` doesn't imply that the packages exposed
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# through this attribute are "legacy" packages. Instead, `legacyPackages`
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# is used here as a substitute attribute name for `packages`. The problem
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# with `packages` is that it makes operations like `nix flake show
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# nixpkgs` unusably slow due to the sheer number of packages the Nix CLI
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# needs to evaluate. But when the Nix CLI sees a `legacyPackages`
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# attribute it displays `omitted` instead of evaluating all packages,
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# which keeps `nix flake show` on Nixpkgs reasonably fast, though less
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# information rich.
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legacyPackages = forAllSystems (system:
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(import ./. { inherit system; }).extend (final: prev: {
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lib = prev.lib.extend libVersionInfoOverlay;
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})
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);
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nixosModules = {
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notDetected = ./nixos/modules/installer/scan/not-detected.nix;
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/*
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Make the `nixpkgs.*` configuration read-only. Guarantees that `pkgs`
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is the way you initialize it.
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Example:
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{
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imports = [ nixpkgs.nixosModules.readOnlyPkgs ];
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nixpkgs.pkgs = nixpkgs.legacyPackages.x86_64-linux;
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}
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*/
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readOnlyPkgs = ./nixos/modules/misc/nixpkgs/read-only.nix;
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};
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};
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}
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