feat: check node.js and npm required versions

package.json

@@ -14,7 +14,8 @@
     "randomstring": "^1.1.3",
     "rimraf": "^2.5.0",
     "shelljs": "^0.5.3",
-    "yargs": "^3.31.0"
+    "yargs": "^3.31.0",
+    "semver": "^5.3.0"
   },
   "devDependencies": {},
   "repository": {

src/Commands/check.js

@@ -0,0 +1,48 @@
+'use strict'
+
+/**
+ * adonis-cli
+ *
+ * (c) Harminder Virk <virk@adonisjs.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+*/
+
+const colors = require('colors')
+const execSync = require('child_process').execSync
+const semver = require('semver')
+
+const requiredNodeVersion = '>=4.0.0'
+const requiredNpmVersion = '>=3.0.0'
+
+module.exports = function (argv) {
+  const nodejsVersion = process.version.replace('v', '')
+  const npmVersion = execSync('npm -v', {input: 'string', 'encoding': 'utf-8'})
+
+  console.log('-----------AdonisJS requirements check--------------')
+  console.log(`${colors.green('AdonisJS needs Node.JS >= 4.0.0 and npm >= 3.0.0\n')}`)
+  console.log(`${colors.green('verifying node.js and npm current installed versions...')}`)
+
+  console.log('\nYour current Node.JS version: ' + colors.yellow(nodejsVersion))
+  console.log('Your current npm version: ' + colors.yellow(npmVersion))
+
+  if (!semver.satisfies(nodejsVersion, requiredNodeVersion)) {
+    console.log(`${colors.red('\nYour current Node.js version does not met AdonisJS requirements.')}`)
+    console.log(`${colors.red('Please update your Node.JS version before continue.')}`)
+    return
+  }
+
+  if (!semver.satisfies(npmVersion, requiredNpmVersion)) {
+    console.log(`${colors.red('\nYour Current npm version does not met AdonisJS requirements.')}`)
+    console.log(`${colors.red('Please update your npm version with this command: ')}`)
+    console.log(`${colors.yellow('npm install -g npm')}`)
+    return
+  }
+
+  if (!semver.satisfies(nodejsVersion, requiredNodeVersion) || !semver.satisfies(npmVersion, requiredNpmVersion)) {
+    return false
+  }
+
+  return true
+}

src/Commands/index.js

@@ -11,5 +11,6 @@
 
 module.exports = {
   new: require('./new'),
-  fix: require('./fix')
+  fix: require('./fix'),
+  check: require('./check')
 }