anchor.diff: -FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.13-alpine as builder
  +FROM --platform=${BUILDPLATFORM:-linux/amd64} tonistiigi/xx:golang AS xgo
  +FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.13-alpine AS builder
   
   ARG BUILD_DATE
   ARG VCS_REF
  -ARG VERSION
  +ARG VERSION=dev
  +
  +ENV CGO_ENABLED 0
  +ENV GO111MODULE on
  +ENV GOPROXY https://goproxy.io
  +COPY --from=xgo / /
   
   ARG TARGETPLATFORM
  -ARG BUILDPLATFORM
  -RUN printf "I am running on ${BUILDPLATFORM:-linux/amd64}, building for ${TARGETPLATFORM:-linux/amd64}\n$(uname -a)\n" \
  -  && $(case ${TARGETPLATFORM:-linux/amd64} in \
  -      "linux/amd64")   echo "GOOS=linux GOARCH=amd64" > /tmp/.env                       ;; \
  -      "linux/arm/v6")  echo "GOOS=linux GOARCH=arm GOARM=6" > /tmp/.env                 ;; \
  -      "linux/arm/v7")  echo "GOOS=linux GOARCH=arm GOARM=7" > /tmp/.env                 ;; \
  -      "linux/arm64")   echo "GOOS=linux GOARCH=arm64" > /tmp/.env                       ;; \
  -      "linux/386")     echo "GOOS=linux GOARCH=386" > /tmp/.env                         ;; \
  -      "linux/ppc64le") echo "GOOS=linux GOARCH=ppc64le" > /tmp/.env                     ;; \
  -      "linux/s390x")   echo "GOOS=linux GOARCH=s390x" > /tmp/.env                       ;; \
  -      *)               echo "TARGETPLATFORM ${TARGETPLATFORM} not found..." && exit 1   ;; \
  -    esac) \
  -  && cat /tmp/.env
  -RUN env $(cat /tmp/.env | xargs) go env
  +RUN go env
   
   RUN apk --update --no-cache add \
       build-base \
  
positive.code: 
  WORKDIR /app
  
  ENV GO111MODULE on
  ENV GOPROXY https://goproxy.io
  COPY go.mod .
  COPY go.sum .
  RUN env $(cat /tmp/.env | xargs) go mod download
  COPY . ./
  
  ARG VERSION=dev
  RUN env $(cat /tmp/.env | xargs) go build -ldflags "-w -s -X 'main.version=${VERSION}'" -v -o ftpgrab cmd/main.go
  
  FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine:latest
  
  
negative.code: RUN apk --update --no-cache add \
      ca-certificates \
      libressl \
      tzdata \
    && rm -rf /tmp/* /var/cache/apk/*
  
  COPY --from=builder /app/ftpgrab /usr/local/bin/ftpgrab
  