check-version.js

/*eslint no-var:0, complexity:0, prefer-arrow-callback:0, brace-style:0*/
'use strict';

var format = require('util').format;
var ok = require('assert').ok;
var expected = process.argv[2].split('.');

process.versions.node.split('.').forEach(function(v, i, actual){switch(i){

  //Major.
  case 0: return ok(expected[0] === v, format(
    'Expected Node major version to be %s. Got %s.', expected[0], v
  ));

  //Minor.
  case 1: return ok(expected[1] <= v, format(
    'Expected Node minor version to be at least %s. Got %s.', expected[1], v
  ));

  //Patch.
  case 2: return ok(expected[1] < actual[1] || expected[2] <= v, format(
    'Expected Node to be patched to at least %s.%s.%s (currently at patch %s).',
    expected[0], expected[1], expected[2], v
  ));

  //Whoops?
  default: throw new Error('Failed to parse Node version');

}});