Added config-dot-notation for config files.

README.md

@@ -177,6 +177,33 @@ node example.js --foo.bar
 { _: [], "foo.bar": true }
 ```
 
+_Note: as of yargs-parser@14.0.0, `dot-notation` has been split into `dot-notation` and `config-dot-notation`_
+
+### config-dot-notation
+
+* default: `false`
+* key: `config-dot-notation`
+
+Should keys in the config file that contain `.` split into objects?
+
+example config.json:
+```json
+{
+  "foo.bar": true
+}
+```
+_if enabled:_
+```sh
+node example.js --config config.json
+{ _: [], foo: { bar: true } }
+```
+
+_if disabled:_
+```sh
+node example.js --config config.json
+{ _: [], "foo.bar": true }
+```
+
 ### parse numbers
 
 * default: `true`

index.js

@@ -16,6 +16,7 @@ function parse (args, opts) {
     'short-option-groups': true,
     'camel-case-expansion': true,
     'dot-notation': true,
+    'config-dot-notation': false,
     'parse-numbers': true,
     'boolean-negation': true,
     'negation-prefix': 'no-',
@@ -545,7 +546,7 @@ function parse (args, opts) {
       // if the value is an inner object and we have dot-notation
       // enabled, treat inner objects in config the same as
       // heavily nested dot notations (foo.bar.apple).
-      if (typeof value === 'object' && value !== null && !Array.isArray(value) && configuration['dot-notation']) {
+      if (typeof value === 'object' && value !== null && !Array.isArray(value) && configuration['config-dot-notation']) {
         // if the value is an object but not an array, check nested object
         setConfigObject(value, fullKey)
       } else {

test/yargs-parser.js

@@ -567,6 +567,7 @@ describe('yargs-parser', function () {
     it('should load nested options from config file', function () {
       var jsonPath = path.resolve(__dirname, './fixtures/nested_config.json')
       var argv = parser(['--settings', jsonPath, '--nested.foo', 'bar'], {
+        configuration: { 'config-dot-notation': true },
         config: ['settings']
       })
 
@@ -718,6 +719,7 @@ describe('yargs-parser', function () {
 
     it('should load nested options from config object', function () {
       var argv = parser(['--nested.foo', 'bar'], {
+        configuration: { 'config-dot-notation': true },
         configObjects: [{
           a: 'a',
           nested: {