#!/usr/bin/env bash

set -xe

SOURCE=$1
TAG=$2

require_input() {
    input=$1
    name=$2

    if [ "$input" == "" ]; then
        echo "Input, $name, required but not present"
        exit 1;
    fi
}

require_input "$SOURCE" "Dockerfile"
require_input "$TAG" "container tag"

architectures=('arm64v8' 'arm32v7' 'amd64')

for architecture in "${architectures[@]}"; do
    sed "s/FROM ubuntu/FROM $architecture\/ubuntu/g" "$SOURCE" > ""$SOURCE"-$architecture"
    if [ "$architecture" == arm32v7 ]; then
        sed -i'' 's/x64/armv7l/g' ""$SOURCE"-$architecture" # for node
        sed -i'' 's/amd64/armhf/g' ""$SOURCE"-$architecture" # for tini
    fi

    if [ "$architecture" == arm64v8 ]; then
        sed -i'' 's/x64/arm64/g' ""$SOURCE"-$architecture" # for node
        sed -i'' 's/amd64/arm64/g' ""$SOURCE"-$architecture" # for tini
    fi

    buildah build-using-dockerfile -f ""$SOURCE"-$architecture" -t "$TAG-$architecture" ..

    rm ""$SOURCE"-$architecture"
done