FROM scratch AS base
ENV VERSION=1.8.9
ENV SRC_HASH=962fe7d3da7653519d2975e130244af9286db32041b0745613aebf89949a9009
ENV SRC_FILE=v${VERSION}.tar.gz
ENV SRC_SITE=https://github.com/fullstorydev/grpcurl/archive/refs/tags/${SRC_FILE}
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 GOLDFLAGS="-w -extldflags \"-static\" -X \"main.version=${VERSION}\""

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 ${SRC_FILE}
WORKDIR grpcurl-${VERSION}
ENV GOPATH="/grpcurl-${VERSION}"
RUN go get ./...

FROM fetch AS build
RUN --network=none go build -trimpath -v ./cmd/grpcurl

from build as install
RUN <<-EOF
    set -eu
    mkdir -p /rootfs/usr/bin/
    cp grpcurl /rootfs/usr/bin/
EOF

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