FROM scratch AS base
ENV VERSION=0.16.2
ENV SRC_FILE=v${VERSION}.tar.gz
ENV SRC_SITE=https://github.com/docker/buildx/archive/${SRC_FILE}
ENV SRC_HASH=f314635765f3dc5efe089244280cd24a577e83d339fec1970fed16977bf28382

FROM base AS fetch
ADD --checksum=sha256:${SRC_HASH} ${SRC_SITE} .

FROM fetch AS build
COPY --from=stagex/musl . /
COPY --from=stagex/bash . /
COPY --from=stagex/busybox . /
COPY --from=stagex/go . /
COPY --from=stagex/make . /
COPY --from=stagex/gcc . /
COPY --from=stagex/binutils . /
COPY --from=stagex/pkgconf . /
RUN tar -xf ${SRC_FILE}
ENV GOPROXY=https://proxy.golang.org,direct
ENV GOSUMDB=sum.golang.org
ENV GOPATH=/cache/go
ENV GOBIN=${GOPATH}/bin
ENV PATH=${GOBIN}:${PATH}
WORKDIR /buildx-${VERSION}
RUN <<-EOF
    set -eux
    mkdir -p out
    go build \
        -v \
        -modcacherw \
        --ldflags=" \
            -w -s -buildid= \
		    -X github.com/moby/buildkit/version.Version=${VERSION} \
		    -X github.com/moby/buildkit/version.Revision=stagex \
		    -X github.com/moby/buildkit/version.PKG=github.com/docker/buildx \
        " \
        -o docker-buildx \
        ./cmd/buildx
EOF

FROM build AS install
RUN install -Dm755 docker-buildx -t /rootfs/usr/libexec/docker/cli-plugins/

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