Find the tag of a Docker image having only the SHA256

get-docker-image-tag-by-sha.sh

#!/bin/bash

SHA256_HASH="5bb4faffc8b35e2702b2ffa78e982b979d7b66db29bd55b0c58de8fa745df661"

for i in {1..1000}
do
   echo "Looking into page: $i"

   curl "https://registry.hub.docker.com/v2/repositories/apache/superset/tags/?page=$i" \
    | jq '.results[] | select(.["images"][]["digest"] == "sha256:'${SHA256_HASH}'")'
done

For official images like https://hub.docker.com/_/node the namespace is "library".

Also, I think @Kyu meant for $hash to be $SHA256_HASH. Fixed:

#!/bin/bash

SHA256_HASH="5bb4faffc8b35e2702b2ffa78e982b979d7b66db29bd55b0c58de8fa745df661"
NAMESPACE='apache'
REPO_NAME='superset'

for i in {1..1000}; do 
    if [ $i -eq 100 ]; then
        echo -e "\e[35mSleeping for 7 seconds on page $i...\e[0m"
        sleep 7
    fi

    echo "Looking into page: $i"

    result=$(
        curl -s "https://registry.hub.docker.com/v2/repositories/$NAMESPACE/$REPO_NAME/tags/?page=$i" \
        | jq -r ".results[] | select(.[\"images\"][][\"digest\"] == \"sha256:$SHA256_HASH\" or .digest == \"sha256:$SHA256_HASH\")"
    ) || break

    if [ ! -z "$result" ]; then
        echo "$result" | jq '.'
        break
    fi
done