moby--moby/hack/make/.ensure-frozen-images-windows

#!/bin/bash
set -e

# This scripts sets up the required images for Windows to Windows CI

# Tag (microsoft/)windowsservercore as latest
set +e
! BUILD=$(docker images | grep windowsservercore | grep -v latest | awk '{print $2}')
if [ -z $BUILD ]; then
	echo "ERROR: Could not find windowsservercore images"
	exit 1
fi

# Get the name. Around 2016 6D TP5, these have the microsoft/ prefix, hence cater for both.
! IMAGENAME=$(docker images | grep windowsservercore | grep -v latest | awk '{print $1}')
if [ -z $IMAGENAME ]; then
	echo "ERROR: Could not find windowsservercore image"
	exit 1
fi

! LATESTCOUNT=$(docker images | grep windowsservercore | grep -v $BUILD | wc -l)
if [ $LATESTCOUNT -ne 1 ]; then
	set -e
	docker tag $IMAGENAME:$BUILD windowsservercore:latest
	echo "INFO: Tagged $IMAGENAME:$BUILD as windowsservercore:latest"
fi

# Busybox (requires windowsservercore)
if [ -z "$(docker images | grep busybox)" ]; then
	echo "INFO: Building busybox"
	docker build -t busybox https://raw.githubusercontent.com/jhowardmsft/busybox/master/Dockerfile
fi