add package for 'biri', a fork of niri with PRs merged

modules/packages/biri.nix

@@ -0,0 +1,40 @@
+{ inputs, self, ... }: {
+  perSystem = { pkgs, ... }: {
+    packages = let
+      finalAttrs = rec {
+        name = "${pname}-${version}";
+        pname = "biri";
+        version = "26.04";
+
+        src = pkgs.fetchFromGitHub {
+          owner = "barrulus";
+          repo = pname;
+          rev = "82efb3c0fb688a0c738d15517a2e6a44ed7ca703";
+          hash = "sha256-Gg4UHnugGnVZifxfKRUnxt3T+DSPgUvHEfE9tflA5zM=";
+        };
+
+        cargoHash = "sha256-aNovCzrTtmqTO33YtZap47npdN73zXC1bap5q5dZvZk=";
+      };
+
+      overrideAttrs = with pkgs; prev: {
+        rustPlatform = prev.rustPlatform // {
+          buildRustPackage = args: pkgs.rustPlatform.buildRustPackage (args finalAttrs // finalAttrs);
+        };
+      };
+    in {
+      biri = pkgs.niri.override (prev: overrideAttrs prev);
+
+      biri-unwrapped = pkgs.niri.override (prev: (overrideAttrs prev) // {
+        rustPlatform = (overrideAttrs prev).rustPlatform // {
+          buildRustPackage = args: pkgs.rustPlatform.buildRustPackage (args finalAttrs // {
+            postInstall = ''
+              install -Dm0644 README.md resources/default-config.kdl -t $doc/share/doc/niri
+              mv docs/wiki $doc/share/doc/niri/wiki
+              cp -r . $out
+            '';
+          });
+        };
+      });
+    };
+  };
+}