chore: import upstream snapshot with attribution

ci/docker/ray-cpp-wheel.Dockerfile

@@ -0,0 +1,89 @@
+# syntax=docker/dockerfile:1.3-labs
+#
+# Ray C++ Wheel Builder
+# =====================
+# Builds manylinux2014-compatible ray-cpp wheel using pre-built C++ artifacts from wanda cache.
+#
+# This is a minimal Dockerfile for ray-cpp wheel builds only.
+# It copies only the files needed for the cpp wheel, reducing build context size.
+
+ARG RAY_CORE_IMAGE
+ARG RAY_CPP_CORE_IMAGE
+ARG RAY_JAVA_IMAGE
+ARG RAY_DASHBOARD_IMAGE
+ARG MANYLINUX_VERSION
+ARG HOSTTYPE
+
+FROM ${RAY_CORE_IMAGE} AS ray-core
+FROM ${RAY_CPP_CORE_IMAGE} AS ray-cpp-core
+FROM ${RAY_JAVA_IMAGE} AS ray-java
+FROM ${RAY_DASHBOARD_IMAGE} AS ray-dashboard
+
+# Main build stage - manylinux2014 provides GLIBC 2.17
+FROM rayproject/manylinux2014:${MANYLINUX_VERSION}-jdk-${HOSTTYPE} AS builder
+
+ARG BUILDKITE_COMMIT
+
+WORKDIR /home/forge/ray
+
+# Copy artifacts from all stages
+COPY --from=ray-core /ray_pkg.zip /tmp/
+COPY --from=ray-core /ray_py_proto.zip /tmp/
+COPY --from=ray-java /ray_java_pkg.zip /tmp/
+COPY --from=ray-dashboard /dashboard.tar.gz /tmp/
+
+# Minimal source files needed for cpp wheel build
+COPY --chown=forge ci/build/build-ray-cpp-wheel.sh ci/build/
+COPY --chown=forge README.rst pyproject.toml ./
+COPY --chown=forge python/setup.py python/
+COPY --chown=forge python/LICENSE.txt python/
+COPY --chown=forge python/MANIFEST.in python/
+COPY --chown=forge python/ray/_version.py python/ray/
+
+USER forge
+ENV BUILDKITE_COMMIT=${BUILDKITE_COMMIT:-unknown}
+RUN --mount=from=ray-cpp-core,source=/,target=/ray-cpp-core,ro \
+    <<'EOF'
+#!/bin/bash
+set -euo pipefail
+
+# Clean extraction dirs to avoid stale leftovers
+rm -rf /tmp/ray_pkg /tmp/ray_java_pkg /tmp/ray_cpp_pkg
+mkdir -p /tmp/ray_pkg /tmp/ray_java_pkg /tmp/ray_cpp_pkg
+
+# Unpack pre-built artifacts
+unzip -o /tmp/ray_pkg.zip -d /tmp/ray_pkg
+unzip -o /tmp/ray_py_proto.zip -d python/
+unzip -o /tmp/ray_java_pkg.zip -d /tmp/ray_java_pkg
+mkdir -p python/ray/dashboard/client/build
+tar -xzf /tmp/dashboard.tar.gz -C python/ray/dashboard/client/build/
+
+# C++ core artifacts
+cp -r /tmp/ray_pkg/ray/* python/ray/
+
+# Java JARs
+cp -r /tmp/ray_java_pkg/ray/* python/ray/
+
+# C++ API artifacts (headers, libs, examples)
+unzip -o /ray-cpp-core/ray_cpp_pkg.zip -d /tmp/ray_cpp_pkg
+cp -r /tmp/ray_cpp_pkg/ray/cpp python/ray/
+
+# Build Python-agnostic cpp wheel
+./ci/build/build-ray-cpp-wheel.sh
+
+# Sanity check: ensure wheels exist
+if [[ ! -d .whl ]]; then
+  echo "ERROR: .whl directory not created"
+  exit 1
+fi
+wheels=($(find .whl -maxdepth 1 -name '*.whl'))
+if (( ${#wheels[@]} == 0 )); then
+  echo "ERROR: No wheels produced in .whl/"
+  ls -la .whl
+  exit 1
+fi
+
+EOF
+
+FROM scratch
+COPY --from=builder /home/forge/ray/.whl/*.whl /opt/artifacts/