Add tag to a docker image in ECR via AWS CLI

ecr-add-tag.sh

#!/usr/bin/env bash

function ecr-add-tag() {
  if (( $# < 3 )); then
    echo "Wrong number of arguments. Usage:  ecr-add-tag ECR_REPO_NAME TAG_TO_FIND TAG_TO_ADD [AWS_PROFILE]"
    return
  fi
  local repo_name=$1
  local existing_tag=$2
  local new_tag=$3
  local profile=$4
  [[ ! -z "$profile" ]] && profile="--profile ${profile}"

  manifest=`aws ecr batch-get-image ${profile} \
                    --repository-name $repo_name \
                    --image-ids imageTag=$existing_tag \
                    --query 'images[].imageManifest' \
                    --output text`
  aws ecr put-image ${profile} \
                    --repository-name $repo_name \
                    --image-tag $new_tag \
                    --image-manifest "${manifest}"
}

Thank you so much