FROM scratch AS base
ENV VERSION=0.32.3
ENV SRC_HASH=1b22781ff5f1f5ab0f8c831fe68609411627406198b7de71ac5ea80b7100700e
ENV SRC_FILE=v${VERSION}.tar.gz
ENV SRC_SITE=https://github.com/derailed/k9s/archive/refs/tags/${SRC_FILE}
ENV GOPATH=/cache/go
ENV GOCACHE=/cache/
ENV GOWORK=off
ENV GOPROXY=https://proxy.golang.org,direct
ENV GOSUMDB=sum.golang.org
ENV CGO_ENABLED=0
ENV GOHOSTOS=linux
ENV GOHOSTARCH=amd64
ENV GO11MODULE=off

FROM base AS fetch
COPY --from=stagex/busybox . /
COPY --from=stagex/go . /
COPY --from=stagex/ca-certificates . /
ADD --checksum=sha256:${SRC_HASH} ${SRC_SITE} .
RUN tar -xvf ${SRC_FILE}
WORKDIR /k9s-${VERSION}
RUN go get ./...

FROM fetch AS build
RUN --network=none go build -trimpath -o k9s -v main.go

FROM build AS install
RUN <<-EOF
    set -eu
    mkdir -p /rootfs/usr/bin/
    cp k9s /rootfs/usr/bin/
EOF

FROM stagex/filesystem AS package
COPY --from=install /rootfs/./ /