Dockerfile.discovery-handler

ARG RUST_VERSION=1.73.0
FROM --platform=$BUILDPLATFORM rust:${RUST_VERSION} as build
RUN apt-get update && \
    apt-get install -y --no-install-recommends protobuf-compiler 
ARG TARGETPLATFORM RUST_VERSION
RUN case "$TARGETPLATFORM" in \
    "linux/arm/v7") echo "armv7-unknown-linux-gnueabihf";; \
    "linux/arm64") echo "aarch64-unknown-linux-gnu";; \
    "linux/amd64") echo "x86_64-unknown-linux-gnu";; \
    *) exit 1;; \
    esac > /rust_target
RUN rustup target add --toolchain $RUST_VERSION $(cat /rust_target)
RUN rustup component add rustfmt --toolchain $RUST_VERSION
RUN USER=root cargo new --bin dh
WORKDIR /dh
COPY ./Cargo.toml ./Cargo.toml
RUN cargo build --release && \
    rm ./src/*.rs && \
    DEP_PATH=`echo "./target/release/deps/mqtt-discovery-handler*" | tr - _` && \
    rm $DEP_PATH
COPY ./src ./src
RUN cargo build --release

FROM debian:buster-slim
RUN apt-get update && \
    apt-get install -y --no-install-recommends libssl-dev && \
    apt-get clean
COPY --from=build /dh/target/release/mqtt-discovery-handler /mqtt-discovery-handler
ENTRYPOINT ["/mqtt-discovery-handler"]