docker-magento/compose/bin/install-php-extensions

#!/bin/bash
if ! bin/cliq ls /usr/local/bin/install-php-extensions; then
  echo "Downloading install-php-extensions, just a moment..."
  bin/rootnotty curl -sSLf \
    -o /usr/local/bin/install-php-extensions \
    https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions
  bin/rootnotty chmod +x /usr/local/bin/install-php-extensions
fi

bin/root install-php-extensions "$@"