ARG BUILDPLATFORM=linux/amd64

# Precompile key slow-to-build dependencies
FROM --platform=$BUILDPLATFORM golang:1.14.2-alpine as go-deps
WORKDIR /linkerd-build
COPY go.mod go.sum ./
COPY bin/install-deps bin/
RUN go mod download
ARG TARGETARCH
RUN ./bin/install-deps $TARGETARCH

## compile metrics-apiservice
FROM go-deps as golang
WORKDIR /linkerd-build
COPY pkg pkg
COPY controller controller
COPY viz/metrics-api viz/metrics-api
COPY viz/pkg viz/pkg

ARG TARGETARCH
RUN CGO_ENABLED=0 GOOS=linux GOARCH=$TARGETARCH go build -o /out/metrics-api -tags prod -mod=readonly -ldflags "-s -w" ./viz/metrics-api/cmd

## package runtime
FROM scratch
ENV PATH=$PATH:/go/bin
COPY LICENSE /linkerd/LICENSE
COPY --from=golang /out/metrics-api /go/bin/metrics-api

ENTRYPOINT ["/go/bin/metrics-api"]