feat(bundlers)!: Export deb, rpm and AppImage bundlers

- All logic is contained in a new `./bundlers/default.nix` module
- Add a `bundlers` `perSystem` output
- Export `deb` and `rpm` bundlers from our fork of `juliosueiras-nix/nix-utils`
  (used by `NixOS/bundlers`, which we originally used)
- Export the `AppImage` bundler from `ralismark/nix-appimage`

Author: reo101

bundlers/default.nix

@@ -0,0 +1,35 @@
+{
+  lib,
+  flake-parts-lib,
+  inputs,
+  ...
+}:
+{
+  imports = [
+    (flake-parts-lib.mkTransposedPerSystemModule {
+      name = "bundlers";
+      option = lib.mkOption {
+        type = lib.types.lazyAttrsOf (lib.types.functionTo lib.types.package);
+        default = { };
+      };
+      file = ./flake.nix;
+    })
+  ];
+
+  perSystem =
+    {
+      pkgs,
+      inputs',
+      config,
+      ...
+    }:
+    {
+      bundlers = {
+        inherit (inputs'.nix-bundlers.bundlers)
+          toDeb
+          toRpm
+          ;
+        toAppimage = inputs'.nix-appimage.bundlers.default;
+      };
+    };
+}

flake.lock

@@ -230,12 +230,11 @@
     };
 
     nix-bundlers = {
-      url = "github:NixOS/bundlers";
+      url = "github:juliosueiras-nix/nix-utils";
       inputs.nixpkgs.follows = "nixpkgs";
-      # TODO: re-add when CI's `nix` starts supporting transitive overrides
-      # inputs.nix-utils.inputs.nixpkgs.follows = "nixpkgs";
-      # inputs.nix-utils.inputs.flake-utils.follows = "flake-utils";
-      # inputs.nix-bundle.inputs.utils.follows = "flake-utils";
+      inputs.systems.follows = "systems";
+      inputs.flake-parts.follows = "flake-parts";
+      inputs.flake-utils.follows = "flake-utils";
     };
 
     nix-appimage = {
@@ -263,6 +262,7 @@
         ./modules
         ./packages
         ./shells
+        ./bundlers
       ];
       systems = [
         "x86_64-linux"