ARG GOVERSION=latest
FROM golang:$GOVERSION AS builder
ARG BUILD_USER
ARG BUILD_HOST
ARG TARGETARCH

WORKDIR /src
COPY . .

ENV CGO_ENABLED=0
RUN if [ ! -f stdiscosrv-linux-$TARGETARCH ] ; then \
    go run build.go -no-upgrade build stdiscosrv ; \
    mv stdiscosrv stdiscosrv-linux-$TARGETARCH ; \
  fi

FROM alpine
ARG TARGETARCH

LABEL org.opencontainers.image.authors="The Syncthing Project" \
      org.opencontainers.image.url="https://syncthing.net" \
      org.opencontainers.image.documentation="https://docs.syncthing.net" \
      org.opencontainers.image.source="https://github.com/syncthing/syncthing" \
      org.opencontainers.image.vendor="The Syncthing Project" \
      org.opencontainers.image.licenses="MPL-2.0" \
      org.opencontainers.image.title="Syncthing Discovery Server"

EXPOSE 19200 8443

VOLUME ["/var/stdiscosrv"]

RUN apk add --no-cache ca-certificates su-exec

COPY --from=builder /src/stdiscosrv-linux-$TARGETARCH /bin/stdiscosrv
COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh

ENV PUID=1000 PGID=1000 HOME=/var/stdiscosrv

HEALTHCHECK --interval=1m --timeout=10s \
  CMD nc -z localhost 8443 || exit 1

WORKDIR /var/stdiscosrv
ENTRYPOINT ["/bin/entrypoint.sh", "/bin/stdiscosrv"]