Dockerfile-sample-using-buildx

# Using buildx
# See https://docs.docker.com/buildx/working-with-buildx/

ARG ARCHITECTURE=amd64

FROM golang:alpine AS build
ARG TARGETPLATFORM
ARG BUILDPLATFORM
ARG ARCHITECTURE=${ARCHITECTURE}
ENV ARCHITECTURE $ARCHITECTURE
RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM" > /log
RUN if [ "$TARGETPLATFORM" = "linux/amd64" ]; then ARCHITECTURE=amd64; elif [ "$TARGETPLATFORM" = "linux/arm/v7" ]; then ARCHITECTURE=arm64; elif [ "$TARGETPLATFORM" = "linux/arm64" ]; then ARCHITECTURE=arm64; else ARCHITECTURE=amd64; fi \
    && echo ${ARCHITECTURE}

FROM alpine
COPY --from=build /log /log