ci: request subsystem maintainers review (#1053)

Link: https://github.com/nix-community/stylix/pull/1053

Co-authored-by: NAHO <90870942+trueNAHO@users.noreply.github.com>
Reviewed-by: Daniel Thwaites <danth@danth.me>
Reviewed-by: Matt Sturgeon <matt@sturgeon.me.uk>
Reviewed-by: NAHO <90870942+trueNAHO@users.noreply.github.com>

flake/dev/default.nix

@@ -4,7 +4,8 @@
     ./dev-shell.nix
     ./packages.nix
     ./pre-commit.nix
-    ./treefmt.nix
     ./public-and-dev-version-consistency.nix
+    ./subsystem-maintainers.nix
+    ./treefmt.nix
   ];
 }

flake/dev/subsystem-maintainers.nix

@@ -0,0 +1,17 @@
+{ lib, ... }:
+{
+  perSystem =
+    { pkgs, ... }:
+    {
+      packages.subsystem-maintainers = pkgs.writeText "subsystem-maintainers" (
+        lib.pipe ../../stylix/meta.nix [
+          (lib.flip pkgs.callPackage { })
+          (lib.mapAttrs (
+            _: meta: map (maintainer: maintainer.github) (meta.maintainers or [ ])
+          ))
+          (lib.mapAttrs' (name: lib.nameValuePair "modules/${name}/"))
+          builtins.toJSON
+        ]
+      );
+    };
+}

flake/propagated-packages.nix

@@ -24,6 +24,7 @@
         {
           inherit (config.partitions.dev.module.flake.packages.${system})
             all-maintainers
+            subsystem-maintainers
             ;
         }
         (lib.mkIf pkgs.stdenv.hostPlatform.isLinux (