init cachy kernel

packages/linux-cachyos/kernel.nix

@@ -0,0 +1,84 @@
+{
+  cachyConfig,
+  kconfigToNix,
+  config,
+  configfile,
+  callPackage,
+  lib,
+  linuxManualConfig,
+  stdenv,
+  # Weird injections
+  kernelPatches ? [ ],
+  features ? null,
+  randstructSeed ? "",
+  # For tests
+  kernelPackages,
+  flakes,
+  final,
+}:
+let
+  inherit (cachyConfig.versions.linux) version;
+  # Single-value optional attr
+  optionalAttr =
+    key: pred: value:
+    if pred then { "${key}" = value; } else { };
+in
+(linuxManualConfig {
+  inherit
+    stdenv
+    version
+    features
+    randstructSeed
+    ;
+  inherit (configfile) src;
+  modDirVersion = lib.versions.pad 3 "${version}${cachyConfig.versions.suffix}";
+
+  inherit config configfile;
+  allowImportFromDerivation = false;
+
+  kernelPatches =
+    kernelPatches
+    ++ builtins.map (filename: {
+      name = builtins.baseNameOf filename;
+      patch = filename;
+    }) configfile.passthru.kernelPatches;
+
+  extraMeta = {
+    maintainers = with lib.maintainers; [
+      dr460nf1r3
+      pedrohlc
+    ];
+    inherit (configfile.meta) platforms;
+  };
+}).overrideAttrs
+  (prevAttrs: {
+    postPatch = prevAttrs.postPatch + configfile.extraVerPatch;
+    # bypasses https://github.com/NixOS/nixpkgs/issues/216529
+    passthru =
+      prevAttrs.passthru
+      // {
+        inherit cachyConfig kconfigToNix;
+        features = {
+          efiBootStub = true;
+          ia32Emulation = true;
+          netfilterRPFilter = true;
+        };
+        isLTS = false;
+        isZen = true;
+        isHardened = cachyConfig.cpuSched == "hardened";
+        isLibre = false;
+        updateScript = null;
+        tests = (prevAttrs.passthru.tests or { }) // {
+          plymouth = import ./test.nix {
+            inherit kernelPackages;
+            inherit (flakes) nixpkgs;
+            chaotic = flakes.self;
+          } final;
+        };
+      }
+      // optionalAttr "updateScript" (cachyConfig.withUpdateScript != null) (
+        callPackage ./update.nix {
+          inherit (cachyConfig) withUpdateScript;
+        }
+      );
+  })