sha_function.sh

#!/bin/bash
#set -x
get_manifest_sha (){
    local repo=$1
    local arch=$2
    docker pull -q $1 &>/dev/null
    docker manifest inspect $1 > "$2".txt
    sha=""
    i=0
    while [ "$sha" == "" ] && read -r line
    do
        archecture=$(jq .manifests[$i].platform.architecture "$2".txt |sed -e 's/^"//' -e 's/"$//')
        if [ "$archecture" = "$2" ];then
            sha=$(jq .manifests[$i].digest "$2".txt  |sed -e 's/^"//' -e 's/"$//')
            echo ${sha}
        fi
        i=$i+1
    done < "$2".txt
}

get_sha(){
    repo=$1
    docker pull $1 &>/dev/null
    #sha=$(docker image inspect $1 |jq .[0].RootFS.Layers |grep sha)
    sha=$(docker image inspect $1 | jq --raw-output '.[0].RootFS.Layers|.[]')   # [0] means first element of list,[]means all the elments of lists
    echo $sha
}

is_base (){
    local base_sha    # alpine
    local image_sha   # new image
    local base_repo=$1
    local image_repo=$2

    base_sha=$(get_sha $base_repo)
    image_sha=$(get_sha $image_repo)

    for i in $base_sha; do
        local found="false"
        for j in $image_sha; do
            if [[ $i = $j ]]; then
                found="true"
                break
            fi
        done
        if [ $found == "false" ]; then
            echo "false"
            return 0
        fi
    done
    echo "true"
}

compare (){
    result_arm=$(is_base $1 $2)
    result_arm64=$(is_base $3 $4)
    result_amd64=$(is_base $5 $6)
    if [ $result_arm == "false" ] || [ $result_amd64 == "false" ] || [ $result_arm64 == "false" ]
    then
        echo "true"
    else
        echo "false"
    fi
}

create_manifest (){
    local repo=$1
    local tag1=$2
    local tag2=$3
    local x86=$4
    local rpi=$5
    local arm64=$6
    docker manifest create $repo:$tag1 $x86 $rpi $arm64
    docker manifest create $repo:$tag2 $x86 $rpi $arm64
    docker manifest annotate $repo:$tag1 $x86 --arch amd64
    docker manifest annotate $repo:$tag1 $rpi --arch arm
    docker manifest annotate $repo:$tag1 $arm64 --arch arm64
    docker manifest annotate $repo:$tag2 $x86 --arch amd64
    docker manifest annotate $repo:$tag2 $rpi --arch arm
    docker manifest annotate $repo:$tag2 $arm64 --arch arm64
}