linux_lqx, linux_zen: refactor to unify

Unify linux_zen and linux_lqx -> zen-kernels

pkgs/os-specific/linux/kernel/linux-lqx.nix

@@ -1,26 +0,0 @@
-{ lib, fetchFromGitHub, buildLinux, linux_zen, ... } @ args:
-
-let
-  version = "5.15.16";
-  suffix = "lqx2";
-in
-
-buildLinux (args // {
-  modDirVersion = "${version}-${suffix}";
-  inherit version;
-  isZen = true;
-
-  src = fetchFromGitHub {
-    owner = "zen-kernel";
-    repo = "zen-kernel";
-    rev = "v${version}-${suffix}";
-    sha256 = "sha256-kdT/hiASZ72pkS0Igta0KT0GWTgDRjxBnd5CQ0eonfg=";
-  };
-
-  extraMeta = {
-    branch = "5.14/master";
-    maintainers = with lib.maintainers; [ atemu ];
-    description = linux_zen.meta.description + " (Same as linux_zen but less aggressive release schedule)";
-  };
-
-} // (args.argsOverride or { }))

pkgs/os-specific/linux/kernel/linux-zen.nix

@@ -1,39 +0,0 @@
-{ lib, fetchFromGitHub, buildLinux, ... } @ args:
-
-let
-  # having the full version string here makes it easier to update
-  modDirVersion = "5.18.5-zen1";
-  parts = lib.splitString "-" modDirVersion;
-  version = lib.elemAt parts 0;
-  suffix = lib.elemAt parts 1;
-
-  numbers = lib.splitString "." version;
-  branch = "${lib.elemAt numbers 0}.${lib.elemAt numbers 1}";
-  rev = if ((lib.elemAt numbers 2) == "0") then "v${branch}-${suffix}" else "v${modDirVersion}";
-in
-
-buildLinux (args // {
-  inherit version modDirVersion;
-  isZen = true;
-
-  src = fetchFromGitHub {
-    owner = "zen-kernel";
-    repo = "zen-kernel";
-    inherit rev;
-    sha256 = "sha256-q6a8Wyzs6GNQ39mV+q/9N6yo/kXS9ZH+QTfGka42gk4=";
-  };
-
-  structuredExtraConfig = with lib.kernel; {
-    ZEN_INTERACTIVE = yes;
-    # TODO: Remove once #175433 reaches master
-    # https://nixpk.gs/pr-tracker.html?pr=175433
-    WERROR = no;
-  };
-
-  extraMeta = {
-    inherit branch;
-    maintainers = with lib.maintainers; [ atemu andresilva ];
-    description = "Built using the best configuration and kernel sources for desktop, multimedia, and gaming workloads.";
-  };
-
-} // (args.argsOverride or { }))

pkgs/os-specific/linux/kernel/zen-kernels.nix

@@ -0,0 +1,40 @@
+{ lib, fetchFromGitHub, buildLinux, ... } @ args:
+
+let
+  zenVariant = {
+    version = "5.18.5";
+    suffix = "zen1";
+    sha256 = "sha256-q6a8Wyzs6GNQ39mV+q/9N6yo/kXS9ZH+QTfGka42gk4=";
+    isLqx = false;
+  };
+  lqxVariant = {
+    version = "5.15.16";
+    suffix = "lqx2";
+    sha256 = "sha256-kdT/hiASZ72pkS0Igta0KT0GWTgDRjxBnd5CQ0eonfg=";
+    isLqx = true;
+  };
+  zenKernelsFor = { version, suffix, sha256, isLqx }: buildLinux (args // {
+    inherit version;
+    modDirVersion = "${lib.concatStringsSep "." (lib.take 3 (lib.splitVersion version ++ [ "0" "0" ]))}-${suffix}";
+    isZen = true;
+
+    src = fetchFromGitHub {
+      owner = "zen-kernel";
+      repo = "zen-kernel";
+      rev = "v${version}-${suffix}";
+      inherit sha256;
+    };
+
+    extraMeta = {
+      branch = lib.versions.majorMinor version + "/master";
+      maintainers = with lib.maintainers; [ atemu andresilva psydvl ];
+      description = "Built using the best configuration and kernel sources for desktop, multimedia, and gaming workloads." +
+        lib.optionalString isLqx " (Same as linux_zen but less aggressive release schedule)";
+    };
+
+  } // (args.argsOverride or { }));
+in
+{
+  zen = zenKernelsFor zenVariant;
+  lqx = zenKernelsFor lqxVariant;
+}

pkgs/top-level/linux-kernels.nix

@@ -196,19 +196,23 @@ in {
       ];
     };
 
-    linux_zen = callPackage ../os-specific/linux/kernel/linux-zen.nix {
-      kernelPatches = [
-        kernelPatches.bridge_stp_helper
-        kernelPatches.request_key_helper
-      ];
-    };
+    # Using zenKernels like this due lqx&zen came from one source, but may have different base kernel version
+    # https://github.com/NixOS/nixpkgs/pull/161773#discussion_r820134708
+    zenKernels = callPackage ../os-specific/linux/kernel/zen-kernels.nix;
 
-    linux_lqx = callPackage ../os-specific/linux/kernel/linux-lqx.nix {
+    linux_zen = (zenKernels {
       kernelPatches = [
         kernelPatches.bridge_stp_helper
         kernelPatches.request_key_helper
       ];
-    };
+    }).zen;
+
+    linux_lqx = (zenKernels {
+      kernelPatches = [
+        kernelPatches.bridge_stp_helper
+        kernelPatches.request_key_helper
+      ];
+    }).lqx;
 
     # This contains both the STABLE and EDGE variants of the XanMod kernel
     xanmodKernels = callPackage ../os-specific/linux/kernel/xanmod-kernels.nix;