FROM golang AS step_0

ENV CGO_ENABLED=0 GO111MODULE=on
WORKDIR /root
COPY . .
RUN go build -ldflags "-w -s" -o /proxy

################################################################################

FROM alpine:edge AS step_1

WORKDIR /root
RUN apk add --no-cache build-base linux-headers

RUN wget https://www.bitwizard.nl/mtr/files/mtr-0.94.tar.gz \
    -O mtr-0.94.tar.gz
RUN tar xvf mtr-0.94.tar.gz \
    && cd mtr-0.94 \
    && ./configure --without-gtk --without-ncurses --without-jansson --without-ipinfo --disable-bash-completion \
    && make -j4 LDFLAGS="-static" \
    && strip /root/mtr-0.94/mtr \
    && strip /root/mtr-0.94/mtr-packet

################################################################################

FROM scratch AS step_2
ENV PATH=/
COPY --from=step_0 /proxy /
COPY --from=step_1 /root/mtr-0.94/mtr /
COPY --from=step_1 /root/mtr-0.94/mtr-packet /
ENTRYPOINT ["/proxy"]