update-local-flakes: Make available as package

If extensions have their lock file updated in some cases,
running .#updateLocalFlakes will not work.

common/update-local-flakes/default.nix

@@ -0,0 +1,2 @@
+{ pkgs, ... }:
+pkgs.writers.writePython3Bin "update-local-flakes" {} (builtins.readFile ./update-local-flakes.py)

common/update-local-flakes/overlay.nix

@@ -0,0 +1,3 @@
+(self: super: {
+  update-local-flakes = super.callPackage ./. {};
+})

flake.nix

@@ -42,6 +42,9 @@
         config = {
           allowUnfree = true;
         };
+        overlays = [
+          (import ./common/update-local-flakes/overlay.nix)
+        ];
       };
       homeManagerConfig = {
         sharedModules = [ self.homeManagerModules.dotfiles ];
@@ -72,7 +75,9 @@
         };
         flakeTools = { self }: flake-utils.lib.eachDefaultSystem (system:
           let
-            pkgs = nixpkgs.legacyPackages.${system};
+            pkgs = import nixpkgs (nixpkgsConfig // {
+              inherit system;
+            });
           in
           {
             apps = {
@@ -94,10 +99,10 @@
                   ${pkgs.lix}/bin/nix repl --expr 'let flake = builtins.getFlake "${self}"; in flake // flake.nixosConfigurations // rec { pkgs = import ${nixpkgs} {}; lib = pkgs.lib; }'
                 ''}";
               };
+              # Available globally should this be needed in times of shenanigans
               updateLocalFlakes = {
                 type = "app";
-                program = "${pkgs.writers.writePython3 "update-local-flakes" { }
-                (builtins.readFile ./common/update-local-flakes.py)}";
+                program = "${pkgs.update-local-flakes}/bin/update-local-flakes";
               };
               nixosRebuild = {
                 type = "app";

hm/rebuild/default.nix

@@ -1,6 +1,7 @@
 { pkgs, config, ... }:
 {
   home.packages = [
+    pkgs.update-local-flakes
     (pkgs.writeShellApplication {
       name = "rb";
       text = ''
@@ -13,21 +14,20 @@
         nixos_flake="$(readlink -f /etc/nixos)"
         if [ -f "$nixos_flake/flake.nix" ]
         then
-          # TODO For extensions this only works on systems where the flake has been resolved
-          nix run "$nixos_flake#updateLocalFlakes" -- "$nixos_flake"
+          update-local-flakes "$nixos_flake"
           nix run "$nixos_flake#nixosRebuild" -- "$verb" "$@"
         fi
         # TODO Fix nix-on-droid and home-manager
         # hm_flake="${config.xdg.configHome}/home-manager/flake.nix"
         # if [ -f "$hm_flake" ]
         # then
-        #   {ulf} "$hm_flake"
+        #   update-local-flakes "$hm_flake"
         #   home-manager "$verb" "$@"
         # fi
         # nod_flake="${config.xdg.configHome}/nix-on-droid/flake.nix"
         # if [ -f "$nod_flake" ]
         # then
-        #   {ulf} "$nod_flake"
+        #   update-local-flakes "$nod_flake"
         #   nix-on-droid "$verb" --flake "$(dirname "$nod_flake")" "$@"
         # fi
       '';