Containerfile


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# Two binaries, one image, Alpine in both stages, matching git-forge's own
# Containerfile.
#
# forge/ is vendored by ./fetch-forge before a build and is not committed.

FROM alpine:3.23 AS build
RUN apk add --no-cache go
WORKDIR /src

COPY forge/ ./forge/
COPY go.mod ./syncd/
COPY *.go ./syncd/

# Static, so the runtime image needs no Go. buildvcs is off because neither tree
# carries a .git this build should read.
RUN cd forge && CGO_ENABLED=0 go build -trimpath -buildvcs=false -ldflags "-s -w" -o /git-forge .
RUN cd syncd && CGO_ENABLED=0 go build -trimpath -buildvcs=false -ldflags "-s -w" -o /syncd .

FROM alpine:3.23
# git-daemon is not the daemon here: in Alpine that subpackage is where
# git-http-backend lives, and without it every clone and push answers 500.
# tini reaps what git leaves: a detached gc is reparented to PID 1 and would
# otherwise stay a zombie.
RUN apk add --no-cache git git-daemon cgit highlight ca-certificates tini
COPY --from=build /git-forge /usr/local/bin/git-forge
COPY --from=build /syncd /usr/local/bin/syncd
# Which git-forge this is; syncd logs it at startup.
COPY --from=build /src/forge/.rev /etc/git-forge.rev

# Non-root, and the datadir is credential material, so 0700 and one owner.
RUN adduser -D -H -u 1000 forge \
	&& install -d -o forge -g forge -m 0700 /var/lib/git-forge
USER forge
ENV HOME=/tmp

# No VOLUME: this disk is ephemeral by design and the durable copy is in the
# bucket. 8081 is syncd; git-forge listens on loopback only.
EXPOSE 8081
ENTRYPOINT ["/sbin/tini", "--", "/usr/local/bin/syncd"]