refactor: modulization

pkgs/overlays/default.nix

@@ -0,0 +1,7 @@
+{ config }:
+prev: final: {
+  imports = [
+    ./ferium.nix
+    (import ./vesktop.nix { inherit config; })
+  ];
+}

pkgs/overlays/ferium.nix

@@ -0,0 +1,20 @@
+prev: final: {
+  ferium = prev.ferium.overrideAttrs (
+    final: prev: rec {
+      cargoHash = "sha256-yedl4KQCpT7Ai1EPvwD5kzhkHesIjGVAcxKjp5k2jmI=";
+      version = "4.7.0";
+      src = prev.fetchFromGitHub {
+        owner = "gorilla-devs";
+        repo = prev.pname;
+        rev = "v${version}";
+        hash = "sha256-jj3BdaxH7ofhHNF2eu+burn6+/0bPQQZ8JfjXAFyN4A=";
+      };
+
+      cargoDeps = prev.rustPlatform.fetchCargoVendor {
+        inherit (final) pname src version;
+        useFetchCargoVendor = true;
+        hash = final.cargoHash;
+      };
+    }
+  );
+}

pkgs/overlays/vesktop.nix

@@ -0,0 +1,37 @@
+{ config }:
+final: prev:
+let
+  discordIcon = prev.lib.readFile ../../pkgs/assets/discord.svg;
+  discordSplash = prev.lib.readFile ../../pkgs/assets/peepoLeave.gif.base64;
+in
+{
+  vesktop = prev.vesktop.overrideAttrs (oldAttrs: {
+    desktopItems = prev.lib.optional prev.stdenv.hostPlatform.isLinux (
+      (prev.lib.head oldAttrs.desktopItems).override {
+        name = "discord";
+        desktopName = "Discord";
+        exec =
+          if config.hardware.nvidia.prime.offload.enableOffloadCmd == true then
+            "nvidia-offload vesktop %U"
+          else
+            "vesktop %U";
+      }
+    );
+
+    patches = oldAttrs.patches ++ [
+      ../../pkgs/patches/splash.patch
+    ];
+
+    # Change Splash
+    preConfigure = ''
+      echo "${discordSplash}" | base64 -d > static/peepo.gif
+    '';
+
+    # Change Icon
+    postInstall = ''
+      rm -rf $out/share/icons/hicolor/*
+      mkdir -p $out/share/icons/hicolor/scalable/apps
+      echo '${discordIcon}' > $out/share/icons/hicolor/scalable/apps/vesktop.svg
+    '';
+  });
+}