nix: Initial commit of flake

Author: jpds

flake.lock

@@ -0,0 +1,32 @@
+{
+  description = "Nix flake for OpenZFS (ZFS)";
+
+  # The inputs, such as Nixpkgs and flake-utils
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; # Adjust to the desired channel or version
+
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  # Outputs from this flake (e.g. packages, system configurations)
+  outputs =
+    {
+      nixpkgs,
+      flake-utils,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+        openzfs = pkgs.callPackage ./nix/default.nix {
+          kernel = pkgs.linux_6_12;
+        };
+      in
+      {
+        packages.default = openzfs;
+      }
+    );
+}

flake.nix

@@ -0,0 +1,138 @@
+{
+  stdenv,
+  lib,
+  pkgs,
+  kernel,
+  kernelModuleMakeFlags ? [ ],
+  autoreconfHook,
+  attr,
+  coreutils,
+  gawk,
+  gnused,
+  gnugrep,
+  ksh,
+  libtirpc,
+  libuuid,
+  nukeReferences,
+  openssl,
+  pam,
+  pkg-config,
+  python3,
+  systemd,
+  udevCheckHook,
+  zlib,
+}:
+
+stdenv.mkDerivation {
+  pname = "zfs";
+  version = "2.3.4-${kernel.version}"; # Specify the version of ZFS you want
+
+  src = ./..;
+
+  preConfigure = ''
+    # The kernel module builds some tests during the configurePhase, this envvar controls their parallelism
+    export TEST_JOBS=$NIX_BUILD_CORES
+    if [ -z "$enableParallelBuilding" ]; then
+      export TEST_JOBS=1
+    fi
+  '';
+
+  postPatch = ''
+    patchShebangs scripts tests
+
+    substituteInPlace ./config/user-systemd.m4    --replace-fail "/usr/lib/modules-load.d" "$out/etc/modules-load.d"
+    substituteInPlace ./config/zfs-build.m4       --replace-fail "\$sysconfdir/init.d"     "$out/etc/init.d" \
+      --replace-fail "/etc/default"            "$out/etc/default"
+    substituteInPlace ./contrib/initramfs/Makefile.am \
+      --replace-fail "/usr/share/initramfs-tools" "$out/usr/share/initramfs-tools"
+
+    substituteInPlace ./udev/vdev_id \
+      --replace-fail "PATH=/bin:/sbin:/usr/bin:/usr/sbin" \
+       "PATH=${
+         lib.makeBinPath [
+           coreutils
+           gawk
+           gnused
+           gnugrep
+           systemd
+         ]
+       }"
+
+    substituteInPlace ./config/zfs-build.m4 \
+      --replace-fail "bashcompletiondir=/etc/bash_completion.d" \
+        "bashcompletiondir=$out/share/bash-completion/completions" \
+      --replace-fail 'DEBUG_CFLAGS="-Werror"' ' '
+
+    # Tests
+    # Not required with Nix
+    sed -i s/"^constrain_path$"/""/ scripts/zfs-tests.sh
+    substituteInPlace ./scripts/zfs-tests.sh \
+      --replace-fail '"$STF_PATH/ksh"'            "${lib.getExe pkgs.ksh}"
+    substituteInPlace ./tests/test-runner/bin/test-runner.py.in \
+      --replace-fail "/usr/share/zfs/"            "$out/share/zfs/" \
+      --replace-fail "KILL = 'kill'"            "KILL = '${lib.getExe' pkgs.coreutils "kill"}'" \
+      --replace-fail "SUDO = 'sudo'"            "SUDO = '/run/wrappers/bin/sudo'" \
+      --replace-fail "TRUE = 'true'"            "TRUE = '${lib.getExe' pkgs.coreutils "true"}'"
+  '';
+
+  buildInputs = [
+    attr
+    libtirpc
+    libuuid
+    openssl
+    pam
+    python3
+    systemd
+    zlib
+  ];
+
+  nativeBuildInputs = [
+    autoreconfHook
+    ksh
+    nukeReferences
+    pkg-config
+    udevCheckHook
+    kernel.moduleBuildDependencies
+  ];
+
+  enableParallelBuilding = true;
+
+  configureFlags = [
+    "--with-linux=${kernel.dev}/lib/modules/${kernel.modDirVersion}/source"
+    "--with-linux-obj=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "--with-dracutdir=$(out)/lib/dracut"
+    "--with-udevdir=$(out)/lib/udev"
+    "--with-systemdunitdir=$(out)/etc/systemd/system"
+    "--with-systemdpresetdir=$(out)/etc/systemd/system-preset"
+    "--with-systemdgeneratordir=$(out)/lib/systemd/system-generator"
+    "--with-mounthelperdir=$(out)/bin"
+    "--libexecdir=$(out)/libexec"
+    "--sysconfdir=/etc"
+    "--localstatedir=/var"
+    "--enable-systemd"
+    "--enable-pam"
+
+    # Debug
+    "--enable-debug"
+    "--enable-debuginfo"
+    "--enable-asan"
+    "--enable-ubsan"
+    "--enable-debug-kmem"
+    "--enable-debug-kmem-tracking"
+  ]
+  ++ map (f: "KERNEL_${f}") kernelModuleMakeFlags;
+
+  doInstallCheck = true;
+
+  installFlags = [
+    "sysconfdir=\${out}/etc"
+    "DEFAULT_INITCONF_DIR=\${out}/default"
+    "INSTALL_MOD_PATH=\${out}"
+  ];
+
+  meta = with lib; {
+    description = "OpenZFS on Linux";
+    license = licenses.cddl;
+    platforms = platforms.linux;
+  };
+}