Npxd NPM | npm.io

npxd

npx for Docker

npxd <command> is like npx <command> but runs command inside Docker container defined in docker-compose.yml.

The main benefit: seamless command invocation from either host machine or inside container:

if invoked from host machine - ensures container is running via docker compose up and runs command via docker compose exec
if invoked from inside container - just runs command ¯\_(ツ)_/¯

Usage

Ensure you have docker-compose.yml file in your project
Install npxd (details):
```
npm i -D npxd
```

Prepend package.json scripts with npxd:

"scripts": {
-  "test": "mocha test/*.js",
+  "test": "npxd mocha test/*.js",
},

Run as usual from your host machine:
```
npm test
```

Check results of command executed in container:

$ npm test

> npxd mocha test/*.js

Recreating example_app_1 ... done

  ✓ should add numbers

  1 passing (36ms)

See full example code in example directory.

Installation

There are to installation options:

Install from NPM (recommended)

Installing from npm will add npxd executable to node_modules/.bin of your project. You will be able to use npxd command in package.json scripts.

npm i -D npxd

Install from GitHub

Alternatively you can download script directly from GitHub and store it in your project. It allows you to adopt script for your needs (as it's a few lines of code). But in that case you should invoke it as ./npxd.sh not npxd in package.json scripts.

wget -O npxd.sh https://raw.githubusercontent.com/vitalets/npxd/main/npxd.sh
chmod +x npxd.sh

Passing env variables

This will NOT work:

"scripts": {
  "lint": "FOO=42 npxd eslint ./src"
},

But this will work:

"scripts": {
  "lint": "npxd env FOO=42 eslint ./src"
},

Configuring service name

if there is single service in docker-compose.yml, commands will automatically run inside it
if there are several services in docker-compose.yml, you should create .npxdrc file containing target service name

Example of .npxdrc that runs commands in my_app service: