#!/bin/sh

#
# downloadArchive
# ${1} : The download url
# ${2} : the checksum
# ${3} : the filename of download target
# ${4} : the checksum command to use (default sha256sum)
#
downloadArchive(){
    url=${1}
    sum=${2}
    archive=${3}
    if [ -n ${4} ]
    then
        checkCmd=${4}
    else
        checkCmd="sha256sum"
    fi

    wget -q ${url}
    set +e
    echo "${sum} ${archive}" | ${checkCmd} -cs
    if [ ${?} ]
    then
        set -e
        return 0
    else
        set -e
        return 2
    fi
}

extractArchiveXZ(){
    source=${1}
    destination=${2}
    cmd="tar xzvf"

    if [ ! -d ${destination} ]
    then
       mkdir -p ${destination}
    fi
    ${cmd} ${source} -C ${destination}
    return ${?}
}

cleanUpImage(){
    rm -rf /var/cache/apk/*
    rm -rf /tmp/*
    rm -rf /root/.ssh
}