Unshell NPM | npm.io

shell

Set your shell free !

Combine the flexibility of a programming language with the knowledge of shell command. As developer, sometimes, we need to run shell scripts. It will be cool to do so with the familiarity of a programming language. An an ops, sometimes, we need to run complex shell scripts. It will be cool to do so with the power of a programming language.

Features

Light: There are no dependencies
Easy: A small abstraction over child_process
Async: Work with async/await command
Testable: Unshell script are easily testable because they yield execution control

Setup

Execute script through Shell

npm install -g unshell

Embedded script inside apps

npm install unshell

Usage

Execute script through Shell

Execute script through unshell runtime

Usage:
  unshell COMMAND [SCRIPT_PATH] [ARGS...]

Commands:
  help      Print this help message
  run       run a script through unshell runtime

Given the script: pause.js to pause all docker containers

module.exports = function * pause () {
  const ids = yield * fetchContainerIds()

  for(const id of ids) {
    yield `docker pause ${id}`
  }
}

function * fetchContainerIds () {
  const ids = yield `docker ps -q --no-trunc`

  return ids.split('\n').filter(Boolean)
}

Run it through unshell

unshell run pause.js

Embedded script inside apps

Given the precedent script pause.js Run it with zeit/micro

module.exports = (req, res) => {
  const {resolve} = require('path')
  const {unshell} = require('unshell')

  try {
    const script = require(resolve('./scripts/pause.js'))
    unshell({env: process.env})(script)

    res.end('OK')
  } catch (err) {
    res.end('NOK')
  }
}