fix: cli options should override package.json options

The first priority from CLI(from user) settings then package.json.

Fixed #845

__tests__/lib/merge_config.js

@@ -10,7 +10,30 @@ test('bad config', async function() {
   }
 });
 
-test('nc(mergeConfig)', function(done) {
+test('right merging package configuration', async function() {
+  // Omit configuration from output, for simplicity
+  var nc = _.curryRight(_.omit, 2)([
+    'config',
+    'no-package',
+    'parseExtension',
+    'project-homepage',
+    'project-version'
+  ]);
+  return mergeConfig({
+    config: path.join(__dirname, '../config_fixture/config.json'),
+    'no-package': true,
+    'project-name': 'cool Documentation'
+  })
+    .then(nc)
+    .then(res => {
+      expect(res).toEqual({
+        'project-name': 'cool Documentation',
+        foo: 'bar'
+      });
+    });
+});
+
+test('nc(mergeConfig)', async function() {
   // Omit configuration from output, for simplicity
   var nc = _.curryRight(_.omit, 2)([
     'config',
@@ -21,7 +44,7 @@ test('nc(mergeConfig)', function(done) {
     'project-version'
   ]);
 
-  Promise.all(
+  return Promise.all(
     [
       [
         { config: path.join(__dirname, '../config_fixture/config.json') },
@@ -74,7 +97,5 @@ test('nc(mergeConfig)', function(done) {
           expect(res).toEqual(pair[1]);
         })
     )
-  ).then(res => {
-    done();
-  });
+  );
 });

src/merge_config.js

@@ -3,7 +3,6 @@
 var yaml = require('js-yaml'),
   fs = require('fs'),
   pify = require('pify'),
-  _ = require('lodash'),
   readPkgUp = require('read-pkg-up'),
   path = require('path'),
   stripComments = require('strip-json-comments');
@@ -29,7 +28,7 @@ function processToc(config: DocumentationConfig, absFilePath: string) {
  * values of `name` and `version` config.
  *
  * @param {Object} config the user-provided config, usually via argv
- * @returns {Object} configuration with inferred parameters
+ * @returns {Promise<Object>} configuration with inferred parameters
  * @throws {Error} if the file cannot be read.
  */
 function mergePackage(config: Object): Promise<Object> {
@@ -38,16 +37,12 @@ function mergePackage(config: Object): Promise<Object> {
   }
   return (
     readPkgUp()
-      .then(pkg =>
-        _.defaults(
-          {},
-          _.mapKeys(
-            _.pick(pkg.pkg, ['name', 'homepage', 'version']),
-            (val, key) => `project-${key}`
-          ),
-          config
-        )
-      )
+      .then(pkg => {
+        ['name', 'homepage', 'version'].forEach(key => {
+          config[`project-${key}`] = config[`project-${key}`] || pkg.pkg[key];
+        });
+        return config;
+      })
       // Allow this to fail: this inference is not required.
       .catch(() => config)
   );