FROM rust:1.99 AS builder
# bindgen, used by the Rust SDK to generate bindings for the dynamic modules ABI,
# requires libclang.
RUN --mount=type=tmpfs,target=/var/cache/apt \
    --mount=type=tmpfs,target=/var/lib/apt/lists \
    apt-get -qq update \
    && apt-get -qq install -y clang
WORKDIR /build
# Fetch the dependencies first to leverage the Docker cache.
COPY ./Cargo.toml ./Cargo.lock ./
RUN mkdir src \
    && touch src/lib.rs \
    && cargo fetch \
    && rm -rf src
COPY ./src src
RUN cargo build --release

FROM envoyproxy/envoy:dev
ENV ENVOY_DYNAMIC_MODULES_SEARCH_PATH=/usr/local/lib
COPY --from=builder /build/target/release/libdynamic_mod_rust.so /usr/local/lib/libdynamic_mod_rust.so
COPY ./envoy.yaml /etc/envoy.yaml
RUN chmod go+r /etc/envoy.yaml /usr/local/lib/libdynamic_mod_rust.so
CMD ["/usr/local/bin/envoy", "-c", "/etc/envoy.yaml", "--service-cluster", "proxy"]