1 files changed, 86 insertions, 0 deletions
diff --git a/Omni/Bild/Deps/bitsandbytes.nix b/Omni/Bild/Deps/bitsandbytes.nix
new file mode 100644
index 0000000..eb32aac
--- /dev/null
+++ b/Omni/Bild/Deps/bitsandbytes.nix
@@ -0,0 +1,86 @@
+{ lib, buildPythonPackage, fetchFromGitHub, python, pythonOlder, pytestCheckHook
+, setuptools, torch, einops, lion-pytorch, scipy, symlinkJoin }:
+
+let
+  pname = "bitsandbytes";
+  version = "0.38.0";
+
+  inherit (torch) cudaPackages cudaSupport;
+  inherit (cudaPackages) cudaVersion;
+
+  # NOTE: torchvision doesn't use cudnn; torch does!
+  #   For this reason it is not included.
+  cuda-common-redist = with cudaPackages; [
+    cuda_cccl # <thrust/*>
+    libcublas # cublas_v2.h
+    libcurand
+    libcusolver # cusolverDn.h
+    libcusparse # cusparse.h
+  ];
+
+  cuda-native-redist = symlinkJoin {
+    name = "cuda-native-redist-${cudaVersion}";
+    paths = with cudaPackages;
+      [
+        cuda_cudart # cuda_runtime.h cuda_runtime_api.h
+        cuda_nvcc
+      ] ++ cuda-common-redist;
+  };
+
+  cuda-redist = symlinkJoin {
+    name = "cuda-redist-${cudaVersion}";
+    paths = cuda-common-redist;
+  };
+
+in buildPythonPackage {
+  inherit pname version;
+  format = "pyproject";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "TimDettmers";
+    repo = pname;
+    rev = "refs/tags/${version}";
+    hash = "sha256-gGlbzTDvZNo4MhcYzLvWuB2ec7q+Qt5/LtTbJ0Rc+Kk=";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile --replace "/usr/bin/g++" "g++" --replace "lib64" "lib"
+    substituteInPlace bitsandbytes/cuda_setup/main.py  \
+      --replace "binary_path = package_dir / binary_name"  \
+                "binary_path = Path('$out/${python.sitePackages}/${pname}')/binary_name"
+  '' + lib.optionalString torch.cudaSupport ''
+    substituteInPlace bitsandbytes/cuda_setup/main.py  \
+      --replace "/usr/local/cuda/lib64" "${cuda-native-redist}/lib"
+  '';
+
+  CUDA_HOME = "${cuda-native-redist}";
+
+  preBuild = if torch.cudaSupport then
+    with torch.cudaPackages;
+    let
+      cudaVersion = lib.concatStrings
+        (lib.splitVersion torch.cudaPackages.cudaMajorMinorVersion);
+    in "make CUDA_VERSION=${cudaVersion} cuda${cudaMajorVersion}x"
+  else
+    "make CUDA_VERSION=CPU cpuonly";
+
+  nativeBuildInputs = [ setuptools ]
+    ++ lib.optionals torch.cudaSupport [ cuda-native-redist ];
+  buildInputs = lib.optionals torch.cudaSupport [ cuda-redist ];
+
+  propagatedBuildInputs = [ torch ];
+
+  doCheck = false; # tests require CUDA and also GPU access
+  nativeCheckInputs = [ pytestCheckHook einops lion-pytorch scipy ];
+
+  pythonImportsCheck = [ "bitsandbytes" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/TimDettmers/bitsandbytes";
+    description = "8-bit CUDA functions for PyTorch";
+    license = licenses.mit;
+    maintainers = with maintainers; [ bcdarwin ];
+  };
+}