Checks if a docker image tag exists in AWS ECR, and returns an exit code different than 0 if it doesn't.

find-aws-ecr-image.sh

#!/usr/bin/env bash
# Checks if a docker image tag exists in AWS ECR, and returns an exit code different than 0 if it doesn't.

REGISTRY_ID="${1%%.*}"
IMAGE_TAG=${1##*:}
REPOSITORY="$(echo ${1%%:*} | cut -d / -f 2,3)"

if [[ -z "$REGISTRY_ID" ]] || [[ -z "$IMAGE_TAG" ]] || [[ -z "$REPOSITORY" ]] ; then
    echo "Usage: $( basename $0 ) url:tag"
    echo "Example: $( basename $0 NNNNNNNNN.dkr.ecr.eu-west-1.amazonaws.com/repo-something:latest) "
    exit 1
fi

IMAGE_META="$( aws ecr describe-images --registry-id $REGISTRY_ID --repository-name=$REPOSITORY --image-ids=imageTag=$IMAGE_TAG 2> /dev/null )"

if [[ $? == 0 ]]; then
    if echo "${IMAGE_META}" | jq '.imageDetails[0].imageTags' | grep -q \"$IMAGE_TAG\";then
      echo "$1 found"
    else
      echo "$IMAGE_TAG not found or the JSON response changed"
      exit 2
    fi
else
    echo "$1 not found. Please check if the image for this branch has been built and the CI/CD job finished successfuly."
    exit 1
fi