project: move to nixpkgs Rust infrastructure

This builds the stub and tool using `rustPlatform.buildRustPackage`
which features a stable Rust compiler, recent enough to support UEFI
targets.

In the future, it will rely on properly defined targets for UEFI in
nixpkgs.

flake.lock

@@ -1,34 +1,5 @@
 {
   "nodes": {
-    "crane": {
-      "inputs": {
-        "flake-compat": [
-          "flake-compat"
-        ],
-        "flake-utils": [
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "rust-overlay": [
-          "rust-overlay"
-        ]
-      },
-      "locked": {
-        "lastModified": 1683505101,
-        "narHash": "sha256-VBU64Jfu2V4sUR5+tuQS9erBRAe/QEYUxdVMcJGMZZs=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "7b5bd9e5acb2bb0cfba2d65f34d8568a894cdb6c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -106,11 +77,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1684077912,
+        "lastModified": 1685071405,
-        "narHash": "sha256-HNuVjMGmSp3H1MM4ymne3r07ldIB54GgPQViUZjk5Wc=",
+        "narHash": "sha256-qENk2wk0Zli0zeLDKMNcs8CfhPIHhtRQgPamlFUM/xw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "57ace723895c43160e102cc126933d8b395391ea",
+        "rev": "794a24afefde85c3e9b533443c4c73cd871f9e3a",
         "type": "github"
       },
       "original": {
@@ -151,11 +122,11 @@
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1682596858,
+        "lastModified": 1684842236,
-        "narHash": "sha256-Hf9XVpqaGqe/4oDGr30W8HlsWvJXtMsEPHDqHZA6dDg=",
+        "narHash": "sha256-rYWsIXHvNhVQ15RQlBUv67W3YnM+Pd+DuXGMvCBq2IE=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "fb58866e20af98779017134319b5663b8215d912",
+        "rev": "61e567d6497bc9556f391faebe5e410e6623217f",
         "type": "github"
       },
       "original": {
@@ -166,36 +137,11 @@
     },
     "root": {
       "inputs": {
-        "crane": "crane",
         "flake-compat": "flake-compat",
         "flake-parts": "flake-parts",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
-        "pre-commit-hooks-nix": "pre-commit-hooks-nix",
+        "pre-commit-hooks-nix": "pre-commit-hooks-nix"
-        "rust-overlay": "rust-overlay"
-      }
-    },
-    "rust-overlay": {
-      "inputs": {
-        "flake-utils": [
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1684030847,
-        "narHash": "sha256-z4tOxaN9Cl8C80u6wyZBpPt9A9MbL21fZ3zdB/vG+AU=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "aa1480f16bec7dda3c62b8cdb184c7e823331ba2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
       }
     },
     "systems": {

flake.nix

@@ -18,27 +18,13 @@
     # avoid having multiple versions in our dependencies.
     flake-utils.url = "github:numtide/flake-utils";
 
-    crane = {
-      url = "github:ipetkov/crane";
-      inputs.nixpkgs.follows = "nixpkgs";
-      inputs.rust-overlay.follows = "rust-overlay";
-      inputs.flake-utils.follows = "flake-utils";
-      inputs.flake-compat.follows = "flake-compat";
-    };
-
-    rust-overlay = {
-      url = "github:oxalica/rust-overlay";
-      inputs.nixpkgs.follows = "nixpkgs";
-      inputs.flake-utils.follows = "flake-utils";
-    };
-
     flake-compat = {
       url = "github:edolstra/flake-compat";
       flake = false;
     };
   };
 
-  outputs = inputs@{ self, nixpkgs, crane, rust-overlay, flake-parts, ... }:
+  outputs = inputs@{ self, nixpkgs, flake-parts, ... }:
     flake-parts.lib.mkFlake { inherit inputs; } ({ moduleWithSystem, ... }: {
       imports = [
         # Derive the output overlay automatically from all packages that we define.
@@ -48,27 +34,20 @@
         inputs.pre-commit-hooks-nix.flakeModule
       ];
 
-      flake.nixosModules.lanzaboote = moduleWithSystem (
+      flake.nixosModules.lanzaboote = moduleWithSystem (perSystem@{ config }:
-        perSystem@{ config }:
         { ... }: {
-          imports = [
+          imports = [ ./nix/modules/lanzaboote.nix ];
-            ./nix/modules/lanzaboote.nix
-          ];
 
           boot.lanzaboote.package = perSystem.config.packages.tool;
-        }
+        });
-      );
 
-      flake.nixosModules.uki = moduleWithSystem (
+      flake.nixosModules.uki = moduleWithSystem (perSystem@{ config }:
-        perSystem@{ config }:
         { lib, ... }: {
-          imports = [
+          imports = [ ./nix/modules/uki.nix ];
-            ./nix/modules/uki.nix
-          ];
 
-          boot.loader.uki.stub = lib.mkDefault "${perSystem.config.packages.fatStub}/bin/lanzaboote_stub.efi";
+          boot.loader.uki.stub = lib.mkDefault
-        }
+            "${perSystem.config.packages.fatStub}/bin/lanzaboote_stub.efi";
-      );
+        });
 
       systems = [
         "x86_64-linux"
@@ -79,94 +58,23 @@
 
       perSystem = { config, system, pkgs, ... }:
         let
-          pkgs = import nixpkgs {
+          pkgs = import nixpkgs { inherit system; };
-            system = system;
+          uefiPkgs = import nixpkgs {
-            overlays = [
+            inherit system;
-              rust-overlay.overlays.default
+            crossSystem = {
-            ];
+              config = "${pkgs.hostPlatform.linuxArch}-windows";
+              rustc.config = "${pkgs.hostPlatform.linuxArch}-unknown-uefi";
+              libc = null;
+              useLLVM = true;
+            };
           };
 
           inherit (pkgs) lib;
 
-          uefi-rust-stable = pkgs.rust-bin.fromRustupToolchainFile ./rust/stub/rust-toolchain.toml;
+          stub = uefiPkgs.callPackage ./nix/packages/stub.nix { };
-          craneLib = crane.lib.x86_64-linux.overrideToolchain uefi-rust-stable;
+          fatStub =
-
+            uefiPkgs.callPackage ./nix/packages/stub.nix { fatVariant = true; };
-          # Build attributes for a Rust application.
+          tool = pkgs.callPackage ./nix/packages/tool.nix { };
-          buildRustApp = lib.makeOverridable (
-            { src
-            , target ? null
-            , doCheck ? true
-            , extraArgs ? { }
-            }:
-            let
-              commonArgs = {
-                inherit src;
-                CARGO_BUILD_TARGET = target;
-                inherit doCheck;
-
-                # Workaround for https://github.com/ipetkov/crane/issues/262.
-                dummyrs = pkgs.writeText "dummy.rs" ''
-                  #![allow(unused)]
-
-                  #![cfg_attr(
-                    any(target_os = "none", target_os = "uefi"),
-                    no_std,
-                    no_main,
-                  )]
-
-                  #[cfg_attr(any(target_os = "none", target_os = "uefi"), panic_handler)]
-                  fn panic(_info: &::core::panic::PanicInfo<'_>) -> ! {
-                      loop {}
-                  }
-
-                  #[cfg_attr(any(target_os = "none", target_os = "uefi"), export_name = "efi_main")]
-                  fn main() {}
-                '';
-              } // extraArgs;
-
-              cargoArtifacts = craneLib.buildDepsOnly commonArgs;
-            in
-            {
-              package = craneLib.buildPackage (commonArgs // {
-                inherit cargoArtifacts;
-              });
-
-              clippy = craneLib.cargoClippy (commonArgs // {
-                inherit cargoArtifacts;
-                cargoClippyExtraArgs = "-- --deny warnings";
-              });
-
-              rustfmt = craneLib.cargoFmt (commonArgs // { inherit cargoArtifacts; });
-            }
-          );
-
-          stubCrane = buildRustApp {
-            src = craneLib.cleanCargoSource ./rust/stub;
-            target = "x86_64-unknown-uefi";
-            doCheck = false;
-          };
-
-          fatStubCrane = stubCrane.override {
-            extraArgs = {
-              cargoExtraArgs = "--no-default-features --features fat";
-            };
-          };
-
-          stub = stubCrane.package;
-          fatStub = fatStubCrane.package;
-
-          toolCrane = buildRustApp {
-            src = ./rust/tool;
-            extraArgs = {
-              TEST_SYSTEMD = pkgs.systemd;
-              nativeCheckInputs = with pkgs; [
-                binutils-unwrapped
-                sbsigntool
-              ];
-            };
-          };
-
-          tool = toolCrane.package;
 
           wrappedTool = pkgs.runCommand "lzbt"
             {
@@ -177,7 +85,9 @@
             # Clean PATH to only contain what we need to do objcopy. Also
             # tell lanzatool where to find our UEFI binaries.
             makeWrapper ${tool}/bin/lzbt $out/bin/lzbt \
-              --set PATH ${lib.makeBinPath [ pkgs.binutils-unwrapped pkgs.sbsigntool ]} \
+              --set PATH ${
+                lib.makeBinPath [ pkgs.binutils-unwrapped pkgs.sbsigntool ]
+              } \
               --set LANZABOOTE_STUB ${stub}/bin/lanzaboote_stub.efi
           '';
         in
@@ -188,24 +98,21 @@
             lzbt = wrappedTool;
           };
 
-          overlayAttrs = {
+          overlayAttrs = { inherit (config.packages) tool; };
-            inherit (config.packages) tool;
-          };
 
-          checks =
+          checks = let
-            let
             nixosLib = import (pkgs.path + "/nixos/lib") { };
-              runTest = module: nixosLib.runTest {
+            runTest = module:
+              nixosLib.runTest {
                 imports = [ module ];
                 hostPkgs = pkgs;
               };
-            in
+          in {
-            {
+            toolFmt = (tool.override { enableFmt = true; });
-              toolClippy = toolCrane.clippy;
+            stubFmt = (stub.override { enableFmt = true; });
-              stubClippy = stubCrane.clippy;
+            toolClippy = (tool.override { enableLint = true; });
-              fatStubClippy = fatStubCrane.clippy;
+            stubClippy = (stub.override { enableLint = true; });
-              toolFmt = toolCrane.rustfmt;
+            fatStubClippy = (fatStub.override { enableLint = true; });
-              stubFmt = stubCrane.rustfmt;
           } // (import ./nix/tests/lanzaboote.nix {
             inherit pkgs;
             lanzabooteModule = self.nixosModules.lanzaboote;
@@ -236,18 +143,10 @@
                 export PATH=$PATH:${systemdUkify}/lib/systemd
               '';
 
-            packages =
+            packages = [
-              let
+              pkgs.uefi-run
-                uefi-run = pkgs.callPackage ./nix/packages/uefi-run.nix {
-                  inherit craneLib;
-                };
-              in
-              [
-                uefi-run
               pkgs.openssl
-                (pkgs.sbctl.override {
+              (pkgs.sbctl.override { databasePath = "pki"; })
-                  databasePath = "pki";
-                })
               pkgs.sbsigntool
               pkgs.efitools
               pkgs.python39Packages.ovmfvartool
@@ -257,10 +156,7 @@
               pkgs.cargo-release
             ];
 
-            inputsFrom = [
+            inputsFrom = [ config.packages.stub config.packages.tool ];
-              config.packages.stub
-              config.packages.tool
-            ];
 
             TEST_SYSTEMD = pkgs.systemd;
           };

nix/packages/stub.nix

@@ -0,0 +1,66 @@
+{ rust, rustPlatform, clippy, rustfmt, stdenv, lib, runCommand, enableFmt ? false, enableLint ? false, fatVariant ? false }:
+
+let
+  targetSpec = rust.toRustTargetSpec stdenv.hostPlatform;
+  targetIsJSON = lib.hasSuffix ".json" targetSpec;
+  shortTarget =
+    if targetIsJSON then
+      (lib.removeSuffix ".json" (builtins.baseNameOf "${targetSpec}"))
+    else targetSpec;
+in
+rustPlatform.buildRustPackage
+  ({
+    pname = "lanzaboote_stub";
+    version = "0.3.0";
+    src = runCommand "src" { } ''
+      install -D ${../../rust/stub/Cargo.toml} $out/Cargo.toml
+      install -D ${../../rust/stub/Cargo.lock} $out/Cargo.lock
+      cp -r ${../../rust/stub/src} $out/src
+    '';
+
+  # We don't want the thin code.
+  buildNoDefaultFeatures = true;
+  buildFeatures = if fatVariant then [ "fat" ] else [ "thin" ];
+
+    # We don't want the thin code.
+    buildNoDefaultFeatures = fatVariant;
+    buildFeatures = lib.optional fatVariant "fat";
+
+    cargoLock = {
+      lockFile = ../../rust/stub/Cargo.lock;
+    };
+
+    # Necessary because our `cc-wrapper` doesn't understand MSVC link options.
+    RUSTFLAGS = "-Clinker=${stdenv.cc.bintools}/bin/${stdenv.cc.targetPrefix}ld.lld -Clinker-flavor=lld-link";
+    # Necessary because otherwise we will get (useless) hardening options in front of
+    # -flavor link which will break the whole command-line processing for the ld.lld linker.
+    hardeningDisable = [ "all" ];
+
+    meta = with lib; {
+      description = "Lanzaboote UEFI stub for SecureBoot enablement on NixOS systems";
+      homepage = "https://github.com/nix-community/lanzaboote";
+      license = licenses.mit;
+      platforms = [ "x86_64-windows" "aarch64-windows" "i686-windows" ];
+    };
+  } // lib.optionalAttrs enableLint {
+    buildPhase = ''
+      cargo clippy --target ${shortTarget} --all-features -- -D warnings
+      if grep -R 'dbg!' ./src; then
+        echo "use of dbg macro found in code!"
+        false
+      fi
+    '';
+
+    installPhase = ''
+      touch $out
+    '';
+  } // lib.optionalAttrs enableFmt {
+    buildPhase = ''
+      echo "checking formatting..."
+      cargo fmt --all -- --check
+    '';
+
+    installPhase = ''
+      touch $out
+    '';
+  })

nix/packages/tool.nix

@@ -0,0 +1,67 @@
+{ stdenv
+, systemd
+, binutils-unwrapped
+, sbsigntool
+, rustPlatform
+, lib
+, runCommand
+, fetchurl
+, clippy
+, rustfmt
+, path
+, enableLint ? false
+, enableFmt ? false
+}:
+rustPlatform.buildRustPackage
+  ({
+    pname = "lanzaboote_tool";
+    version = "0.3.0";
+    src = runCommand "src" { } ''
+      install -D ${../../rust/tool/Cargo.toml} $out/Cargo.toml
+      install -D ${../../rust/tool/Cargo.lock} $out/Cargo.lock
+      cp -r ${../../rust/tool/src} $out/src
+    '';
+
+    TEST_SYSTEMD = systemd;
+
+    nativeBuildInputs = lib.optional enableLint clippy ++ lib.optional enableFmt rustfmt;
+
+    cargoLock = {
+      lockFile = ../../rust/tool/Cargo.lock;
+    };
+
+    nativeCheckInputs = [
+      binutils-unwrapped
+      sbsigntool
+    ];
+
+    meta = with lib; {
+      description = "Lanzaboote UEFI tooling for SecureBoot enablement on NixOS systems";
+      homepage = "https://github.com/nix-community/lanzaboote";
+      license = licenses.mit;
+    };
+  } // lib.optionalAttrs enableLint {
+    doCheck = false;
+    buildPhase = ''
+      cargo clippy --all-targets --all-features -- -D warnings
+      if grep -R 'dbg!' ./src; then
+        echo "use of dbg macro found in code!"
+        false
+      fi
+    '';
+
+    installPhase = ''
+      touch $out
+    '';
+  } // lib.optionalAttrs enableFmt {
+    doCheck = false;
+
+    buildPhase = ''
+      echo "checking formatting..."
+      cargo fmt --all -- --check
+    '';
+
+    installPhase = ''
+      touch $out
+    '';
+  })

nix/packages/uefi-run.nix

@@ -1,21 +0,0 @@
-{ fetchFromGitHub, craneLib, makeWrapper, OVMF, qemu }:
-craneLib.buildPackage {
-  src = fetchFromGitHub {
-    owner = "Richard-W";
-    repo = "uefi-run";
-
-    rev = "8ba33c934525458a784a6620705bcf46c3ca91d2";
-    sha256 = "fwzWdOinW/ECVI/65pPB1shxPdl2nZThAqlg8wlWg/g=";
-  };
-
-  nativeBuildInputs = [ makeWrapper ];
-
-  postInstall = ''
-    # The hook runs for the dependency-only derivation where the binary is not
-    # produced. We need to skip it there.
-    if [ -f $out/bin/uefi-run ]; then
-      wrapProgram "$out/bin/uefi-run" \
-        --add-flags '--bios-path ${OVMF.fd}/FV/OVMF.fd --qemu-path ${qemu}/bin/qemu-system-x86_64'
-    fi
-  '';
-}