home/flake.nix

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{
description = "Samw's home environment, as managed by nix/home-manager.";
inputs = {
# Nixpkgs
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nixpkgs = {url = "github:nixos/nixpkgs/release-22.11";};
# Other modules
home-manager = {
url = "github:nix-community/home-manager/release-22.11";
inputs.nixpkgs.follows = "nixpkgs";
};
flake-utils.url = "github:numtide/flake-utils";
devshell = {
url = "github:numtide/devshell";
inputs.flake-utils.follows = "flake-utils";
inputs.nixpkgs.follows = "nixpkgs";
};
};
outputs = inputs: let
overlays = [
# Add our own local packages
(final: prev: rec {
# Make my local packages available as pkgs.mypkgs.<foo>
mypkgs = prev.callPackage ./pkgs {};
})
];
in (rec {
profiles = import ./home/profiles.nix;
lib = {
mkHome = {
profiles,
system,
username ? "samw",
}:
inputs.home-manager.lib.homeManagerConfiguration {
pkgs = (import inputs.nixpkgs {
inherit system;
config.allowUnfree = true; # Yes I know it's bad for me
});
modules = [
{ home = {
inherit username;
homeDirectory =
if (inputs.nixpkgs.lib.systems.elaborate system).isDarwin
then "/Users/${username}"
else "/home/${username}";
stateVersion = "21.11";
};}] ++ profiles ++ [
{nixpkgs.overlays = overlays;}
# See comment in home/default.nix.
({ pkgs, ... }: {
nix = {
enable = true;
package = pkgs.nix;
settings.experimental-features = "nix-command flakes";
settings.max-jobs = "auto"; # Gotta go fast (build derivations in parallel)
# Pin the nixpkgs registry to our locked nixpkgs. This means that we
# get the same packages via e.g. nix shell as we have at the system
# level, so less duplication overall and no more fetching that 30MB src
# every time you run nix shell.
registry.nixpkgs.flake = inputs.nixpkgs;
};
})
];
extraSpecialArgs = {inherit system;};
};
};
# Standalone home-manager configurations
homeConfigurations = {
boron = lib.mkHome {
system = "aarch64-darwin";
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profiles = with profiles; [default dev dev-gui sensitive mac docker aws];
username = "samuel.willcocks";
};
zinc = lib.mkHome {
system = "aarch64-darwin";
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profiles = with profiles; [default dev dev-gui sensitive mac];
};
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luroy = lib.mkHome {
system = "x86_64-linux";
profiles = with profiles; [default dev];
};
};
}
# Per-system things
// (inputs.flake-utils.lib.eachDefaultSystem (system: let
pkgs = import inputs.nixpkgs {
inherit system;
overlays = overlays ++ [inputs.devshell.overlay];
};
platform = pkgs.lib.systems.elaborate system;
in {
# Flake interface to my local packages.
# - `callPackage` puts some junk in mypkgs (`override` and
# `overrideDerivation`) so we filter out anything that isn't a derivation
# - We also filter out any packages that aren't supported on the current
# platform.
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packages = with pkgs.lib; (filterAttrs (_: v: (isDerivation v && meta.availableOn platform v)) pkgs.mypkgs);
formatter = pkgs.alejandra;
# A devshell with useful utils
devShells.default = pkgs.devshell.mkShell {
packages = [
inputs.home-manager.defaultPackage.${system}
];
};
})));
}