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armhf-alpine-qemu/Dockerfile

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FROM golang:1.13.11-alpine3.10 as build
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WORKDIR /tmp/build
COPY resin-xbuild.go /tmp/build
RUN go build -ldflags "-w -s" resin-xbuild.go
RUN apk add --no-cache curl
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ENV QEMU_RELEASE_TAG v6.0.0+balena1
ENV QEMU_RELEASE_FILE qemu-6.0.0+balena1-arm.tar.gz
ENV QEMU_RELEASE_SHA256 359c30fb422a18766642cdc634d575ca2d0b6d6d58bda0ec2e33b425c508194c
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RUN QEMU_URL="https://github.com/balena-io/qemu/releases/download/${QEMU_RELEASE_TAG}/${QEMU_RELEASE_FILE}" ; \
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curl -fsSL ${QEMU_URL} -o ${QEMU_RELEASE_FILE}
RUN echo "${QEMU_RELEASE_SHA256} ${QEMU_RELEASE_FILE}" > ${QEMU_RELEASE_FILE}.sha256sum \
sha256sum -c ${QEMU_RELEASE_FILE}.sha256sum
RUN tar --strip 1 -xzf ${QEMU_RELEASE_FILE}
FROM --platform=linux/arm/v7 alpine:3.14.2
ENV QEMU_EXECVE 1
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COPY --from=build /tmp/build/qemu-arm-static /usr/bin
COPY --from=build /tmp/build/resin-xbuild /usr/bin
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RUN [ "/usr/bin/qemu-arm-static", "/bin/sh", "-exc", "ln -s resin-xbuild /usr/bin/cross-build-start; ln -s resin-xbuild /usr/bin/cross-build-end; ln /bin/sh /bin/sh.real" ]