FROM alpine AS builder
ARG MDNS_REPEATER_VERSION=local
WORKDIR /
COPY mdns-repeater.c mdns-repeater.c
RUN set -ex && \
    apk add --no-cache build-base && \
    gcc -o /bin/mdns-repeater mdns-repeater.c -DMDNS_REPEATER_VERSION=\"${MDNS_REPEATER_VERSION}\"

FROM alpine

RUN set -ex && \
    apk add --no-cache vlan libcap bash
COPY --from=builder /bin/mdns-repeater /bin/mdns-repeater
COPY run.sh /app/
RUN chmod +x /bin/mdns-repeater && setcap cap_net_raw=+ep /bin/mdns-repeater && chmod +x /app/run.sh

ENTRYPOINT ["/app/run.sh", "${VLANS}"]