fix(node): support npm passthrough when env isnt supported due to old…

… node version (lirantal#25)

bin/npq-hero.js

@@ -1,6 +1,11 @@
 #!/usr/bin/env node
 'use strict'
 
+// Require minimum node version or bail out
+const cliSupport = require('../lib/helpers/cliSupportHandler')
+cliSupport.isEnvSupport() ||
+  (cliSupport.noSupportError() && cliSupport.packageManagerPassthrough())
+
 const inquirer = require('inquirer')
 const yargs = require('yargs')
 const pkgMgr = require('../lib/packageManager')

bin/npq.js

@@ -1,8 +1,11 @@
 #!/usr/bin/env node
 'use strict'
 
-const inquirer = require('inquirer')
+// Require minimum node version or bail out
+const cliSupport = require('../lib/helpers/cliSupportHandler')
+cliSupport.isEnvSupport() || cliSupport.noSupportError(true)
 
+const inquirer = require('inquirer')
 const cli = require('../lib/cli')
 const pkgMgr = require('../lib/packageManager')
 const Marshall = require('../lib/marshall')

lib/helpers/cliSupportHandler.js

@@ -0,0 +1,35 @@
+'use strict'
+
+const chalk = require('chalk')
+const childProcess = require('child_process')
+const semver = require('semver')
+const DEFAULT_PKGMGR = process.env.NPQ_PKG_MGR || 'npm'
+
+const nodeVersion = process.versions.node
+
+module.exports.isEnvSupport = function () {
+  if (!semver.satisfies(nodeVersion, '>=7.6.0')) {
+    return false
+  }
+
+  return true
+}
+
+module.exports.noSupportError = function (failFast) {
+  console.error(chalk.red('error:'), 'npq suppressed due to old node version')
+
+  if (failFast === true) {
+    process.exit(-1)
+  }
+
+  return true
+}
+
+module.exports.packageManagerPassthrough = function () {
+  const result = childProcess.spawnSync(DEFAULT_PKGMGR, process.argv.slice(2), {
+    stdio: 'inherit',
+    shell: true
+  })
+
+  process.exit(result.status)
+}