rustPlatform.maturinBuildHook: init

This build hook can be used to build Python packages using maturin.

pkgs/build-support/rust/hooks/default.nix

@@ -4,6 +4,7 @@
 , diffutils
 , lib
 , makeSetupHook
+, maturin
 , rust
 , stdenv
 , target ? rust.toRustTargetSpec stdenv.hostPlatform
@@ -62,4 +63,14 @@ in {
         '';
       };
     } ./cargo-setup-hook.sh) {};
+
+  maturinBuildHook = callPackage ({ }:
+    makeSetupHook {
+      name = "maturin-build-hook.sh";
+      deps = [ cargo maturin ];
+      substitutions = {
+        inherit ccForBuild ccForHost cxxForBuild cxxForHost
+          rustBuildPlatform rustTargetPlatform rustTargetPlatformSpec;
+      };
+    } ./maturin-build-hook.sh) {};
 }

pkgs/build-support/rust/hooks/maturin-build-hook.sh

@@ -0,0 +1,39 @@
+maturinBuildHook() {
+    echo "Executing maturinBuildHook"
+
+    runHook preBuild
+
+    if [ ! -z "${buildAndTestSubdir-}" ]; then
+        pushd "${buildAndTestSubdir}"
+    fi
+
+    (
+    set -x
+    env \
+      "CC_@rustBuildPlatform@=@ccForBuild@" \
+      "CXX_@rustBuildPlatform@=@cxxForBuild@" \
+      "CC_@rustTargetPlatform@=@ccForHost@" \
+      "CXX_@rustTargetPlatform@=@cxxForHost@" \
+      maturin build \
+        --cargo-extra-args="-j $NIX_BUILD_CORES --frozen" \
+        --target @rustTargetPlatformSpec@ \
+        --manylinux off \
+        --strip \
+        --release \
+        ${maturinBuildFlags-}
+    )
+
+    runHook postBuild
+
+    if [ ! -z "${buildAndTestSubdir-}" ]; then
+        popd
+    fi
+
+    # Move the wheel to dist/ so that regular Python tooling can find it.
+    mkdir -p dist
+    mv target/wheels/*.whl dist/
+
+    echo "Finished maturinBuildHook"
+}
+
+buildPhase=maturinBuildHook

pkgs/development/compilers/rust/make-rust-platform.nix

@@ -26,5 +26,5 @@ rec {
   # Hooks
   inherit (callPackage ../../../build-support/rust/hooks {
     inherit cargo;
-  }) cargoBuildHook cargoSetupHook;
+  }) cargoBuildHook cargoSetupHook maturinBuildHook;
 }