FROM rustembedded/cross:x86_64-unknown-linux-musl AS amd64-builder

ARG UID=991
ARG GID=991

ENV TOOLCHAIN=stable
ENV TARGET=x86_64-unknown-linux-musl
ENV TOOL=x86_64-linux-musl

RUN \
 apt-get update && \
 apt-get upgrade -y

RUN \
 addgroup --gid "${GID}" build && \
 adduser \
    --disabled-password \
    --gecos "" \
    --ingroup build \
    --uid "${UID}" \
    --home /opt/build \
    build

ADD https://sh.rustup.rs /opt/build/rustup.sh

RUN \
 chown -R build:build /opt/build

USER build
WORKDIR /opt/build

ENV PATH="$PATH:/opt/build/.cargo/bin"

RUN \
 chmod +x rustup.sh && \
 ./rustup.sh --default-toolchain $TOOLCHAIN --profile minimal -y && \
 rustup target add $TARGET

FROM amd64-builder as builder

ARG TAG=master
ARG REPOSITORY=https://git.asonix.dog/asonix/relay
ARG BINARY=relay

RUN \
 git clone -b $TAG $REPOSITORY repo

WORKDIR /opt/build/repo

RUN \
 cargo build --release --target $TARGET && \
 $TOOL-strip target/$TARGET/release/$BINARY

FROM amd64/alpine:3.12

ARG UID=991
ARG GID=991
ARG BINARY=relay
ARG TARGET=x86_64-unknown-linux-musl

RUN \
 apk add tini && \
 addgroup --gid $GID relay && \
 adduser -D -G relay -u $UID -g "" -h /opt/relay relay && \
 chown -R relay:relay /opt/relay

COPY --from=builder /opt/build/repo/target/$TARGET/release/$BINARY /usr/bin/$BINARY

EXPOSE 8080
WORKDIR /opt/relay
USER relay
ENTRYPOINT ["/sbin/tini", "--"]
CMD ["relay"]