Add dag library to config.lib

Also replace all imports of `dag.nix` by the entry in `config.lib`.

modules/files.nix

@@ -1,7 +1,7 @@
 { pkgs, config, lib, ... }:
 
+with config.lib.dag;
 with lib;
-with import ./lib/dag.nix { inherit lib; };
 
 let
 

modules/home-environment.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ./lib/dag.nix { inherit lib; };
 
 let
 

modules/modules.nix

@@ -74,6 +74,7 @@ let
     config._module.args.baseModules = modules;
     config._module.args.pkgs = lib.mkDefault pkgs;
     config._module.check = check;
+    config.lib.dag = import lib/dag.nix { inherit lib; };
     config.nixpkgs.system = mkDefault pkgs.system;
   };
 

modules/programs/gnome-terminal.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ../lib/dag.nix { inherit lib; };
 
 let
 

modules/programs/home-manager.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ../lib/dag.nix { inherit lib; };
 
 let
 

modules/programs/info.nix

@@ -20,8 +20,8 @@
 
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ../lib/dag.nix { inherit lib; };
 
 let
 

modules/services/polybar.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ../lib/dag.nix { inherit lib; };
 
 let
 

modules/services/window-managers/i3.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ../../lib/dag.nix { inherit lib; };
 
 let
 

modules/services/window-managers/xmonad.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ../../lib/dag.nix { inherit lib; };
 
 let
 

modules/systemd.nix

@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 
+with config.lib.dag;
 with lib;
-with import ./lib/dag.nix { inherit lib; };
 
 let