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ARG GO_VERSION=1.12.10

ARG BUILDX_COMMIT=v0.3.1

ARG BUILDX_REPO=https://github.com/docker/buildx.git

FROM golang:${GO_VERSION}-stretch AS build

ARG BUILDX_REPO

RUN git clone "${BUILDX_REPO}" /buildx

WORKDIR /buildx

ARG BUILDX_COMMIT

RUN git fetch origin "${BUILDX_COMMIT}":build && git checkout build

RUN go mod download

ARG GOOS

ARG GOARCH

# Keep these essentially no-op var settings for debug purposes.

# It allows us to see what the GOOS/GOARCH that's being built for is.

RUN GOOS="${GOOS}" GOARCH="${GOARCH}" BUILDX_COMMIT="${BUILDX_COMMIT}"; \

pkg="github.com/docker/buildx"; \

ldflags="\

-X \"${pkg}/version.Version=$(git describe --tags)\" \

-X \"${pkg}/version.Revision=$(git rev-parse --short HEAD)\" \

-X \"${pkg}/version.Package=buildx\" \

"; \

go build -ldflags "${ldflags}" -o /usr/bin/buildx ./cmd/buildx

FROM golang:${GO_VERSION}-stretch

COPY --from=build /usr/bin/buildx /usr/bin/buildx

ENTRYPOINT ["/usr/bin/buildx"]