ensure that database.rules.json has rules key (#196)

lib/config.js

@@ -15,6 +15,8 @@ var parseBoltRules = require('./parseBoltRules');
 var prompt = require('./prompt');
 var resolveProjectPath = require('./resolveProjectPath');
 var utils = require('./utils');
+var validateJsonRules = require('./validateJsonRules');
+var logger = require('./logger');
 
 var Config = function(src, options) {
   this.options = options || {};
@@ -117,7 +119,13 @@ Config.prototype._parseFile = function(target, filePath) {
     if (target === 'database') {
       this.notes.databaseRules = 'json';
     } else if (target === 'database.rules') {
-      return fs.readFileSync(fullPath, 'utf8');
+      var rules = fs.readFileSync(fullPath, 'utf8');
+      if (validateJsonRules(rules)) {
+        return rules;
+      }
+      utils.logWarning(chalk.bold.yellow('database: ') + chalk.bold(filePath) + ' must have an outer ' + chalk.bold('rules') + ' key, for example:');
+      logger.warn('\n{\n\t"rules": {".read": false, ".write": false}\n}');
+      throw new FirebaseError('Database security rules are not correctly formatted', {exit: 1});
     }
     return loadCJSON(fullPath);
   /* istanbul ignore-next */

lib/validateJsonRules.js

@@ -0,0 +1,9 @@
+'use strict';
+
+var cjson = require('cjson');
+var _ = require('lodash');
+
+module.exports = function(rules) {
+  var parsed = cjson.parse(rules);
+  return _.has(parsed, 'rules');
+};