add quiet output

lib/commands/check.js

@@ -53,7 +53,12 @@ module.exports = {
       name: 'warn-only',
       boolean: true,
       default: false
-    }
+    },
+	{
+	  name: 'quiet',
+	  boolean: true,
+	  default: false
+	}
   ],
   command: onCommand
 };

lib/formatters/index.js

@@ -5,5 +5,6 @@ module.exports = {
   default: require('./default'),
   summary: require('./summary'),
   json: require('./json'),
+  quiet: require('./quiet'),
   none: require('./none')
 };

lib/formatters/quiet.js

@@ -0,0 +1,36 @@
+'use strict';
+
+var Chalk = require('chalk');
+var Table = require('cli-table');
+var Cvss = require('cvss');
+
+module.exports = function (err, data, pkgPath) {
+
+  var returnString = '';
+
+  if (err) {
+    if (data) {
+      returnString += Chalk.red('(+) ') + 'Debug output: ' + JSON.stringify(Buffer.isBuffer(data) ? data.toString() : data) + '\n';
+    }
+
+    return returnString + Chalk.yellow('(+) ') + err;
+  }
+
+  var width = 80;
+  var colWidth = 15;
+  if (process.stdout.isTTY) {
+    width = process.stdout.getWindowSize()[0] - 10;
+    if (!width || width <= colWidth) {
+      width = 80;
+    }
+  }
+  if (data.length === 0) {
+
+    return '';
+  }
+
+  returnString += Chalk.red('(+) ') + data.length + ' vulnerabilities found\n';
+
+
+  return returnString;
+};