@jimpick/dat-next/src/extensions.js

Dat is the package manager for data. Easily share and version control data.

var debug = require('debug')('dat')

module.exports = runExtension

function runExtension (opts) {
  debug('Trying Extenion', opts._[0])

  var extName = opts._.shift()
  trySpawn(function () {
    console.error('We could not run the extension. Please make sure it is installed:')
    console.error(`npm install -g dat-${extName}`)
    process.exit(1)
  })

  function trySpawn (cb) {
    var spawn = require('child_process').spawn
    var child = spawn('dat-' + extName, process.argv.splice(3))
    child.stdout.pipe(process.stdout)
    child.stderr.pipe(process.stderr)
    child.on('error', function (err) {
      if (err.code === 'ENOENT') return cb()
      throw err
    })
    child.on('close', function (code) {
      process.exit(code)
    })
  }
}