Docker-based wrapper for npm and friends

$

#!/usr/bin/env bash

# Usage:
#
#  - Run something: ./$ npm --version
#  - Setup something: Add a suitable `prepare` script to your `package.json`, e.g.
#
#       "scripts": {
#         "prepare": "npm i -g @zeit/ncc"
#       }
#
# Important: This container jumps into your work directory with root permissions!

set -eu

project_name="$(basename "${PWD}")"
container_name="${project_name}-node-box"

container_exists() {
    docker ps --all --format 'table {{.Names}}' | grep -qc "${1}"
}

if ! container_exists "${container_name}"; then
    docker run \
        --detach --rm \
        --name "${container_name}" \
        -v "$PWD":/usr/src/app \
        -w /usr/src/app \
        node:12-slim \
        tail -f /dev/null # block
    echo "Container ${container_name} started -- don't forget to stop it later!"

    docker exec -it \
        -w /usr/src/app \
        "${container_name}" \
        npm run prepare
fi

docker exec -it \
    -w /usr/src/app \
    "${container_name}" \
    "${@}"

"Proper" implementation based on this idea: container-do