# -----------------------------------------------------------------------------
# The base image for building the k9s binary
FROM --platform=$BUILDPLATFORM golang:1.27.2-alpine3.24@sha256:f92b6ef800e499660581efdabdf25d9d817a9d124eaf900924f0504e7e27e12d AS build

ARG TARGETOS
ARG TARGETARCH
ENV GOOS=$TARGETOS
ENV GOARCH=$TARGETARCH

WORKDIR /k9s
COPY go.mod go.sum ./
RUN go mod download
COPY main.go Makefile ./
COPY internal internal
COPY cmd cmd
RUN apk --no-cache add --update make \
  && make build

# -----------------------------------------------------------------------------
# Build the final Docker image for the target platform (not the build host).
# Pinning this stage to $BUILDPLATFORM would yield an amd64 runtime image (incl.
# kubectl) even for the arm64 manifest entry, so we let it default to
# $TARGETPLATFORM and use buildx's TARGETARCH to fetch the matching kubectl.
FROM alpine:3.24.2@sha256:294b683cb724975bec92580e1e685676bd4b50bda910ddb8c51d4cabeaec77e6
ARG KUBECTL_VERSION="v1.37.0"
ARG TARGETARCH

COPY --from=build /k9s/execs/k9s /bin/k9s
RUN apk --no-cache add --update ca-certificates \
  && apk --no-cache add --update -t deps curl vim \
  && curl -f -L https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/${TARGETARCH}/kubectl -o /usr/local/bin/kubectl \
  && chmod +x /usr/local/bin/kubectl \
  && apk del --purge deps

ENTRYPOINT [ "/bin/k9s" ]