ARG GOVERSION=latest

#

# Maybe build Syncthing. This is a bit ugly as we can't make an entire

# section of the Dockerfile conditional, so we end up always pulling the

# golang image as builder. Then we check if the executable we need already

# exists (pre-built) otherwise we build it.

#

FROM golang:$GOVERSION AS builder

ARG BUILD_USER

ARG BUILD_HOST

ARG TARGETARCH

WORKDIR /src

COPY . .

ENV CGO_ENABLED=0

RUN if [ ! -f syncthing-linux-$TARGETARCH ] ; then \

go run build.go -no-upgrade build syncthing ; \

mv syncthing syncthing-linux-$TARGETARCH ; \

fi

#

# The rest of the Dockerfile uses the binary from the builder, prebuilt or

# not.

#

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"

EXPOSE 8384 22000/tcp 22000/udp 21027/udp

VOLUME ["/var/syncthing"]

RUN apk add --no-cache ca-certificates curl libcap su-exec tzdata

COPY --from=builder /src/syncthing-linux-$TARGETARCH /bin/syncthing

COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh

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

HEALTHCHECK --interval=1m --timeout=10s \

CMD curl -fkLsS -m 2 127.0.0.1:8384/rest/noauth/health | grep -o --color=never OK || exit 1

ENV STGUIADDRESS=0.0.0.0:8384

ENV STHOMEDIR=/var/syncthing/config

RUN chmod 755 /bin/entrypoint.sh

ENTRYPOINT ["/bin/entrypoint.sh", "/bin/syncthing"]