fix(config): only strip comments on json files

lib/load_config.js

@@ -15,11 +15,17 @@ var yaml = require('js-yaml'),
  * @throws {Error} if the file cannot be read.
  */
 function loadConfig(filePath) {
+  var ext = path.extname(filePath);
+  var rawFile = fs.readFileSync(
+    path.resolve(process.cwd(), filePath), 'utf8'
+  );
+
   try {
-    return yaml.safeLoad(
-      stripComments(
-        fs.readFileSync(
-          path.resolve(process.cwd(), filePath), 'utf8')));
+    if (ext === '.json') {
+      return JSON.parse(stripComments(rawFile));
+    }
+
+    return yaml.safeLoad(rawFile);
   } catch (e) {
     e.message = 'Cannot read config file: ' +
       filePath +

test/config_fixture/config

@@ -0,0 +1 @@
+foo: bar

test/config_fixture/config.yaml

@@ -0,0 +1 @@
+foo: bar

test/config_fixture/config.yml

@@ -0,0 +1 @@
+foo: bar

test/config_fixture/config_links.yml

@@ -0,0 +1,2 @@
+foo: >-
+  hello [link](https://github.com/my/link) world

test/lib/load_config.js

@@ -16,5 +16,17 @@ test('loadConfig', function (t) {
   t.deepEqual(loadConfig(path.join(__dirname, '../config_fixture/config_comments.json')),
     { foo: 'bar' }, 'config with comments');
 
+  t.deepEqual(loadConfig(path.join(__dirname, '../config_fixture/config.yaml')),
+    { foo: 'bar' }, 'config.yaml');
+
+  t.deepEqual(loadConfig(path.join(__dirname, '../config_fixture/config.yml')),
+    { foo: 'bar' }, 'config.yml');
+
+  t.deepEqual(loadConfig(path.join(__dirname, '../config_fixture/config')),
+    { foo: 'bar' }, 'config in yaml without extension');
+
+  t.deepEqual(loadConfig(path.join(__dirname, '../config_fixture/config_links.yml')),
+    { foo: 'hello [link](https://github.com/my/link) world' }, 'config with markdown link');
+
   t.end();
 });