# Go build
FROM golang:1.22 AS go-build

# Add known_hosts entries for GitHub and GitLab
RUN mkdir ~/.ssh
RUN ssh-keyscan github.com >> ~/.ssh/known_hosts
RUN ssh-keyscan gitlab.com >> ~/.ssh/known_hosts

COPY Makefile /app/
WORKDIR /app
COPY go.* /app/
RUN go mod download
COPY core /app/core
COPY pkg /app/pkg
COPY cmd /app/cmd
COPY api /app/api

# These are ARGS are defined here to minimise cache misses
# (cf. https://docs.docker.com/engine/reference/builder/#impact-on-build-caching)
# Pass these flags so we don't have to copy .git/ for those commands to work
ARG GIT_COMMIT="_unset_"
ARG LDFLAGS="-X localbuild=true"

RUN --mount=type=cache,target=/root/.cache/go-build LDFLAGS=${LDFLAGS##-X localbuild=true} GIT_COMMIT=$GIT_COMMIT make gitops-bucket-server

#  Distroless
FROM gcr.io/distroless/base as runtime
COPY --from=go-build /app/bin/gitops-bucket-server /gitops-bucket-server
COPY --from=go-build /root/.ssh/known_hosts /root/.ssh/known_hosts

ENTRYPOINT ["/gitops-bucket-server"]