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path: root/modules/programs/home-manager.nix
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{ config, lib, pkgs, ... }:

with lib;
with import ../lib/dag.nix { inherit lib; };

let

  cfg = config.programs.home-manager;

in

{
  meta.maintainers = [ maintainers.rycee ];

  options = {
    programs.home-manager = {
      enable = mkEnableOption "Home Manager";

      modulesPath = mkOption {
        type = types.nullOr types.str;
        default = null;
        example = "$HOME/devel/home-manager/modules";
        description = ''
          The default path to use for Home Manager modules. If this
          path does not exist then
          <filename>$HOME/.config/nixpkgs/home-manager/modules</filename>
          and <filename>$HOME/.nixpkgs/home-manager/modules</filename>
          will be attempted.
        '';
      };
    };
  };

  config = mkIf cfg.enable {
    home.packages = [
      (import ../../home-manager {
        inherit pkgs;
        inherit (cfg) modulesPath;
      })
    ];

    # Uninstall manually installed home-manager, if such exists.
    # Without this a file collision error will be printed.
    home.activation.uninstallHomeManager =
      dagEntryBetween [ "installPackages" ] [ "writeBoundary" ] ''
        if nix-env -q | grep -q '^home-manager$' ; then
          $DRY_RUN_CMD nix-env -e home-manager

          echo "You can now remove the 'home-manager' packageOverride"
          echo "or overlay in '~/.config/nixpkgs/', if you want."
        fi
      '';
  };
}