#!/bin/bash -eu
# ecr_get_image.sh:	get and unpack a docker image from ECR

REPO_NAME="$1"
TAG="${2:-latest}"

IMAGE="$AWS_ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com/$REPO_NAME:$TAG"

docker pull "$IMAGE"

id=$(docker create "$IMAGE")
docker export $id -o "$REPO_NAME.tar"
docker inspect $id > "$REPO_NAME.json"
docker rm $id

dir="$REPO_NAME.$TAG"
if [ -d "$dir" ]; then
	confirm rm -rf "$dir"
fi
mkdir -p "$dir"
tar -xf "$REPO_NAME.tar" -C "$dir"
rm "$REPO_NAME.tar"

docker rmi "$IMAGE"
# docker system prune -a