Dockerfile

# Stage 1: Build the NativeAOT shared library
FROM mcr.microsoft.com/dotnet/sdk:10.0-aot AS build

WORKDIR /src
COPY native_lib/ native_lib/

# NativeAOT requires an explicit RID. Detect it from the container arch.
RUN ARCH=$(uname -m) && \
    case "$ARCH" in \
      aarch64) RID="linux-arm64" ;; \
      x86_64)  RID="linux-x64" ;; \
      *)       echo "Unsupported: $ARCH" && exit 1 ;; \
    esac && \
    dotnet publish native_lib/ -c Release -r "$RID" -o /build

# Stage 2: Ruby runtime with the native library
FROM ruby:4.0

WORKDIR /app
COPY ruby/ ruby/
COPY --from=build /build/NativeLib.so build/

RUN cd ruby && bundle install

CMD ["bundle", "exec", "--gemfile=ruby/Gemfile", "ruby", "ruby/benchmark.rb"]