ECR login helper for bash.

ecr_login.sh

# Login to ECR, optionally specifying a profile namd and region.
ecr_login () {
  local profile_name="$1"
  local region="$2"
  local args=()
  if [ -n "$profile_name" ]; then
    args=("${args[@]}" "--profile=$profile_name")
  fi
  if [ -n "$region" ]; then
    args=("${args[@]}" "--region=$region")
  fi
  local auth_result=$(aws "${args[@]}" ecr get-authorization-token --output text)
  if [ -z "$auth_result" ]; then
    return
  fi
  local token=$(echo "$auth_result" | cut -f2 | base64 --decode | cut -d: -f2)
  local url=$(echo "$auth_result" | cut -f4)
  echo "$token" | docker login --password-stdin -u AWS "$url"
}