read a usage file to process.stdout, and quit with some exit code
npm install usage-and-quitread a usage file to process.stdout, and quit with some exit code
``javascript`
var join = require('path').join
var pathTo = f => join(__dirname, f)
var usageFile = pathTo('usage.txt')
var usage = require('..')
usage(usageFile)
`
npm install usage-and-quit
will print pathToUsageFile to stdout.
exitCode` is 1 by default.
BSD