treewide: CUDA reformat with nixfmt-rfc-style

.git-blame-ignore-revs

@@ -102,3 +102,6 @@ fb0e5be84331188a69b3edd31679ca6576edb75a
 
 # systemd: break too long lines of Nix code
 67643f8ec84bef1482204709073e417c9f07eb87
+
+# {pkgs/development/cuda-modules,pkgs/test/cuda,pkgs/top-level/cuda-packages.nix}: reformat all CUDA files with nixfmt-rfc-style 2023-03-01
+802a1b4d3338f24cbc4efd704616654456d75a94

.github/workflows/check-nix-format.yml

@@ -0,0 +1,50 @@
+# This file was copied mostly from check-maintainers-sorted.yaml.
+# NOTE: Formatting with the RFC-style nixfmt command is not yet stable. See
+# https://github.com/NixOS/rfcs/pull/166.
+# Because of this, this action is not yet enabled for all files -- only for
+# those who have opted in.
+name: Check that Nix files are formatted
+
+on:
+  pull_request_target:
+permissions:
+  contents: read
+
+jobs:
+  nixos:
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'NixOS'
+    steps:
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        with:
+          # pull_request_target checks out the base branch by default
+          ref: refs/pull/${{ github.event.pull_request.number }}/merge
+      - uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
+        with:
+          # explicitly enable sandbox
+          extra_nix_config: sandbox = true
+      - name: Install nixfmt
+        run: nix-env -f default.nix -iAP nixfmt-rfc-style
+      - name: Check that Nix files are formatted according to the RFC style
+        # Each environment variable beginning with NIX_FMT_PATHS_ is a list of
+        # paths to check with nixfmt.
+        env:
+          # Format paths related to the Nixpkgs CUDA ecosystem.
+          NIX_FMT_PATHS_CUDA: |
+            pkgs/development/cuda-modules
+            pkgs/test/cuda
+            pkgs/top-level/cuda-packages.nix
+        # Iterate over all environment variables beginning with NIX_FMT_PATHS_.
+        run: |
+          for env_var in "${!NIX_FMT_PATHS_@}"; do
+            readarray -t paths <<< "${!env_var}"
+            if [[ "${paths[*]}" == "" ]]; then
+              echo "Error: $env_var is empty."
+              exit 1
+            fi
+            echo "Checking paths: ${paths[@]}"
+            if ! nixfmt --check "${paths[@]}"; then
+              echo "Error: nixfmt failed."
+              exit 1
+            fi
+          done

pkgs/development/cuda-modules/backend-stdenv.nix

@@ -21,6 +21,6 @@ let
   assertCondition = true;
 in
 
-  /* TODO: Consider testing whether we in fact use the newer libstdc++ */
+# TODO: Consider testing whether we in fact use the newer libstdc++
 
 lib.extendDerivation assertCondition passthruExtra cudaStdenv

pkgs/development/cuda-modules/cuda-library-samples/extension.nix

@@ -1,4 +1,4 @@
-{hostPlatform, lib}:
+{ hostPlatform, lib }:
 let
   # Samples are built around the CUDA Toolkit, which is not available for
   # aarch64. Check for both CUDA version and platform.
@@ -8,7 +8,7 @@ let
   extension =
     final: _:
     lib.attrsets.optionalAttrs platformIsSupported {
-      cuda-library-samples = final.callPackage ./generic.nix {};
+      cuda-library-samples = final.callPackage ./generic.nix { };
     };
 in
 extension

pkgs/development/cuda-modules/cuda-library-samples/generic.nix

@@ -22,7 +22,7 @@ let
       cmake
       addOpenGLRunpath
     ];
-    buildInputs = [cudatoolkit];
+    buildInputs = [ cudatoolkit ];
     postFixup = ''
       for exe in $out/bin/*; do
         addOpenGLRunpath $exe
@@ -36,7 +36,7 @@ let
         cuSPARSE, cuSOLVER, cuFFT, cuRAND, NPP and nvJPEG.
       '';
       license = lib.licenses.bsd3;
-      maintainers = with lib.maintainers; [obsidian-systems-maintenance] ++ lib.teams.cuda.members;
+      maintainers = with lib.maintainers; [ obsidian-systems-maintenance ] ++ lib.teams.cuda.members;
     };
   };
 in
@@ -69,9 +69,9 @@ in
 
       src = "${src}/cuTENSOR";
 
-      buildInputs = [cutensor];
+      buildInputs = [ cutensor ];
 
-      cmakeFlags = ["-DCUTENSOR_EXAMPLE_BINARY_INSTALL_DIR=${builtins.placeholder "out"}/bin"];
+      cmakeFlags = [ "-DCUTENSOR_EXAMPLE_BINARY_INSTALL_DIR=${builtins.placeholder "out"}/bin" ];
 
       # CUTENSOR_ROOT is double escaped
       postPatch = ''

pkgs/development/cuda-modules/cuda-samples/generic.nix

@@ -15,65 +15,63 @@
 let
   inherit (lib) lists strings;
 in
-backendStdenv.mkDerivation (
-  finalAttrs: {
-    strictDeps = true;
+backendStdenv.mkDerivation (finalAttrs: {
+  strictDeps = true;
 
-    pname = "cuda-samples";
-    version = cudaVersion;
+  pname = "cuda-samples";
+  version = cudaVersion;
 
-    src = fetchFromGitHub {
-      owner = "NVIDIA";
-      repo = finalAttrs.pname;
-      rev = "v${finalAttrs.version}";
-      inherit hash;
-    };
+  src = fetchFromGitHub {
+    owner = "NVIDIA";
+    repo = finalAttrs.pname;
+    rev = "v${finalAttrs.version}";
+    inherit hash;
+  };
 
-    nativeBuildInputs =
-      [
-        autoAddDriverRunpath
-        pkg-config
-      ]
-      # CMake has to run as a native, build-time dependency for libNVVM samples.
-      # However, it's not the primary build tool -- that's still make.
-      # As such, we disable CMake's build system.
-      ++ lists.optionals (strings.versionAtLeast finalAttrs.version "12.2") [cmake];
+  nativeBuildInputs =
+    [
+      autoAddDriverRunpath
+      pkg-config
+    ]
+    # CMake has to run as a native, build-time dependency for libNVVM samples.
+    # However, it's not the primary build tool -- that's still make.
+    # As such, we disable CMake's build system.
+    ++ lists.optionals (strings.versionAtLeast finalAttrs.version "12.2") [ cmake ];
 
-    dontUseCmakeConfigure = true;
+  dontUseCmakeConfigure = true;
 
-    buildInputs = [
-      cudatoolkit
-      freeimage
-      glfw3
-    ];
+  buildInputs = [
+    cudatoolkit
+    freeimage
+    glfw3
+  ];
 
-    # See https://github.com/NVIDIA/cuda-samples/issues/75.
-    patches = lib.optionals (finalAttrs.version == "11.3") [
-      (fetchpatch {
-        url = "https://github.com/NVIDIA/cuda-samples/commit/5c3ec60faeb7a3c4ad9372c99114d7bb922fda8d.patch";
-        hash = "sha256-0XxdmNK9MPpHwv8+qECJTvXGlFxc+fIbta4ynYprfpU=";
-      })
-    ];
+  # See https://github.com/NVIDIA/cuda-samples/issues/75.
+  patches = lib.optionals (finalAttrs.version == "11.3") [
+    (fetchpatch {
+      url = "https://github.com/NVIDIA/cuda-samples/commit/5c3ec60faeb7a3c4ad9372c99114d7bb922fda8d.patch";
+      hash = "sha256-0XxdmNK9MPpHwv8+qECJTvXGlFxc+fIbta4ynYprfpU=";
+    })
+  ];
 
-    enableParallelBuilding = true;
+  enableParallelBuilding = true;
 
-    preConfigure = ''
-      export CUDA_PATH=${cudatoolkit}
-    '';
+  preConfigure = ''
+    export CUDA_PATH=${cudatoolkit}
+  '';
 
-    installPhase = ''
-      runHook preInstall
+  installPhase = ''
+    runHook preInstall
 
-      install -Dm755 -t $out/bin bin/${backendStdenv.hostPlatform.parsed.cpu.name}/${backendStdenv.hostPlatform.parsed.kernel.name}/release/*
+    install -Dm755 -t $out/bin bin/${backendStdenv.hostPlatform.parsed.cpu.name}/${backendStdenv.hostPlatform.parsed.kernel.name}/release/*
 
-      runHook postInstall
-    '';
+    runHook postInstall
+  '';
 
-    meta = {
-      description = "Samples for CUDA Developers which demonstrates features in CUDA Toolkit";
-      # CUDA itself is proprietary, but these sample apps are not.
-      license = lib.licenses.bsd3;
-      maintainers = with lib.maintainers; [obsidian-systems-maintenance] ++ lib.teams.cuda.members;
-    };
-  }
-)
+  meta = {
+    description = "Samples for CUDA Developers which demonstrates features in CUDA Toolkit";
+    # CUDA itself is proprietary, but these sample apps are not.
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ obsidian-systems-maintenance ] ++ lib.teams.cuda.members;
+  };
+})

pkgs/development/cuda-modules/cuda/extension.nix

@@ -1,4 +1,4 @@
-{cudaVersion, lib}:
+{ cudaVersion, lib }:
 let
   inherit (lib) attrsets modules trivial;
   redistName = "cuda";
@@ -63,23 +63,21 @@ let
             featureRelease
             ;
         }).overrideAttrs
-          (
-            prevAttrs: {
-              # Add the package-specific license.
-              meta = prevAttrs.meta // {
-                license =
-                  let
-                    licensePath =
-                      if redistribRelease.license_path != null then
-                        redistribRelease.license_path
-                      else
-                        "${pname}/LICENSE.txt";
-                    url = "https://developer.download.nvidia.com/compute/cuda/redist/${licensePath}";
-                  in
-                  lib.licenses.nvidiaCudaRedist // {inherit url;};
-              };
-            }
-          );
+          (prevAttrs: {
+            # Add the package-specific license.
+            meta = prevAttrs.meta // {
+              license =
+                let
+                  licensePath =
+                    if redistribRelease.license_path != null then
+                      redistribRelease.license_path
+                    else
+                      "${pname}/LICENSE.txt";
+                  url = "https://developer.download.nvidia.com/compute/cuda/redist/${licensePath}";
+                in
+                lib.licenses.nvidiaCudaRedist // { inherit url; };
+            };
+          });
     in
     drv;