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|
{
inputs = {
flake-utils.url = "github:numtide/flake-utils";
nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
};
outputs = {
self,
nixpkgs,
flake-utils,
}: let
mapOverlayOverride = prefix: overlay: final: prev: let
overlayPkgs = overlay final prev;
in
{
"${prefix}" = (prev.${prefix} or {}) // builtins.removeAttrs overlayPkgs ["override"];
}
// (overlayPkgs.override or {});
doctrineNoPkgs = self.lib.mkDoctrine {
lib = nixpkgs.lib;
pkgs = null;
};
in
flake-utils.lib.eachDefaultSystem (system: let
pkgs = import nixpkgs {inherit system;};
in {
formatter = pkgs.alejandra;
packages =
(import nixpkgs {
inherit system;
overlays = [self.overlays.default];
}).${
doctrineNoPkgs.prefix
};
})
// {
templates = let
system-flake = {
path = ./templates/system-flake;
description = "Opinionated flake for a NixOS system with Home Manager";
};
in {
inherit system-flake;
default = system-flake;
};
overlays = let
overlay = mapOverlayOverride doctrineNoPkgs.prefix (import ./pkgs);
in {
default = overlay;
${doctrineNoPkgs.prefix} = overlay;
};
homeManagerModules.default = ./modules;
nixosModules.default = ./modules;
lib = {
mkDoctrine = import ./doctrine;
mkSystemFlake = {
flakes,
system,
doctrinePrefix ? null,
formatter ? "alejandra",
paths ? {},
}: let
mkDoctrine = args:
self.lib.mkDoctrine
(args
// optionalAttrs (doctrinePrefix != null) {
prefix = doctrinePrefix;
});
doctrineNoPkgs = mkDoctrine {
lib = nixpkgs.lib;
pkgs = null;
};
optionalFlake = name:
if flakes ? "${name}"
then flakes.${name}
else null;
requireFlake = name:
if flakes ? "${name}"
then flakes.${name}
else throw "Required flake input '${name}' is missing";
nur = optionalFlake "nur";
nixpkgs = requireFlake "nixpkgs";
unstable = optionalFlake "unstable";
home-manager =
if hmSourcePath != null
then requireFlake "home-manager"
else null;
pathFromSelf = path: builtins.toPath "${flakes.self}" + "/${path}";
localOverlayPath = pathFromSelf paths.localOverlay;
nixpkgsConfigPath = pathFromSelf paths.nixpkgsConfig;
nixosSourcePath = pathFromSelf paths.nixosSource;
nixosPlatformsPath = pathFromSelf paths.nixosPlatforms;
hmSourcePath = pathFromSelf paths.hmSource;
hmPlatformsPath = pathFromSelf paths.hmPlatforms;
pkgs = importPkgs nixpkgs;
importPkgs = flake:
import flake ({
inherit system;
overlays = let
conditions = [
{
overlay = nur.overlays.default;
condition = nur != null;
}
# NB: Preserve the relative order
{
overlay = mapOverlayOverride prefix (import ./pkgs);
condition = true;
}
{
overlay = flakes.self.overlays.default;
condition = true;
}
];
in
builtins.map (cond: cond.overlay) (builtins.filter (cond: cond.condition) conditions);
}
// optionalAttrs (paths ? nixpkgsConfig) {
config = import nixpkgsConfigPath {inherit (nixpkgs) lib;};
});
inherit (pkgs) lib;
inherit (nixpkgs.lib) optionalAttrs; # Prevents infinite recursion
inherit (doctrineNoPkgs) prefix;
inherit (doctrineNoPkgs.lib) importAll;
in
{
formatter.${system} =
if formatter == "alejandra"
then pkgs.alejandra
else if formatter == "nixpkgs-fmt"
then pkgs.nixpkgs-fmt
else throw "Unknown formatter: '${formatter}'";
packages.${system} = pkgs.${prefix};
overlays.default = final: prev: let
overlay = final: prev:
if paths ? localOverlay
then import localOverlayPath {inherit final prev flakes;}
else {};
in
mapOverlayOverride prefix overlay final prev
// optionalAttrs (unstable != null) {
unstable = importPkgs unstable;
};
}
// optionalAttrs (paths ? nixosSource) {
nixosConfigurations = let
hostConfig = platform:
self.lib.mkSystem {
inherit flakes pkgs;
doctrine = doctrineNoPkgs;
modules = [
nixosSourcePath
platform
];
};
in
lib.mapAttrs (_: hostConfig) (importAll {root = nixosPlatformsPath;});
}
// optionalAttrs (paths ? hmSource) {
homeConfigurations = let
home = name: platform:
home-manager.lib.homeManagerConfiguration {
inherit pkgs;
extraSpecialArgs = {
inherit flakes;
doctrine = mkDoctrine {
inherit pkgs;
namespace = "hm";
};
};
modules = [
self.homeManagerModules.default
hmSourcePath
platform
];
};
in
lib.mapAttrs home (importAll {root = hmPlatformsPath;});
};
mkSystem = {
pkgs,
flakes,
doctrine,
modules,
}:
flakes.nixpkgs.lib.makeOverridable flakes.nixpkgs.lib.nixosSystem {
inherit pkgs;
inherit (pkgs.stdenv.hostPlatform) system;
modules = [self.nixosModules.default] ++ modules;
specialArgs = {
inherit flakes;
doctrine = self.lib.mkDoctrine {
inherit pkgs;
inherit (doctrine) prefix;
namespace = "sys";
};
};
};
};
};
}
|
