if [ $1 ]; then
  export AWS_DEFAULT_PROFILE=$1
  export AWS_PROFILE=$1
  export AWS_EB_PROFILE=$1
  return
elif [ $AWS_PROFILE ]; then
  unset AWS_DEFAULT_PROFILE AWS_PROFILE AWS_EB_PROFILE
  echo AWS profile cleared.
  return
fi

echo "Available profiles"
grep profile ~/.aws/config | sed -E 's/\[profile (.+)\]/\1/'