ARG BUILDPLATFORM=linux/amd64

# Precompile key slow-to-build dependencies
FROM --platform=$BUILDPLATFORM golang:1.22-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 tap
FROM go-deps as golang
WORKDIR /linkerd-build
COPY pkg pkg
# TODO: remove after https://github.com/linkerd/linkerd2/issues/5661
COPY controller controller
# TODO: remove when BuildResource is refactored
# https://github.com/linkerd/linkerd2/issues/5589
COPY viz/metrics-api/gen/viz viz/metrics-api/gen/viz
COPY viz/tap viz/tap
COPY viz/pkg viz/pkg

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

## package runtime
FROM scratch
COPY LICENSE /linkerd/LICENSE
COPY --from=golang /out/tap /tap

ENTRYPOINT ["/tap"]