Fix #1294: multilingual book should extend the book's config

lib/api/decodeConfig.js

@@ -1,5 +1,3 @@
-var Config = require('../models/config');
-
 /**
     Decode changes from a JS API to a config object
 
@@ -13,7 +11,7 @@ function decodeGlobal(config, result) {
     delete values.generator;
     delete values.output;
 
-    return Config.updateValues(config, values);
+    return config.updateValues(values);
 }
 
 module.exports = decodeGlobal;

lib/models/config.js

@@ -18,6 +18,16 @@ Config.prototype.getValues = function() {
     return this.get('values');
 };
 
+/**
+    Change the file for the configuration
+
+    @param {File} file
+    @return {Config}
+*/
+Config.prototype.setFile = function(file) {
+    return this.set('file', file);
+};
+
 /**
     Return a configuration value by its key path
 
@@ -40,7 +50,7 @@ Config.prototype.getValue = function(keyPath, def) {
 
     @param {String} key
     @param {Mixed} value
-    @return {Mixed}
+    @return {Config}
 */
 Config.prototype.setValue = function(keyPath, value) {
     keyPath = Config.keyToKeyPath(keyPath);
@@ -94,6 +104,35 @@ Config.prototype.setPluginDependencies = function(deps) {
     return this.setValue('plugins', plugins);
 };
 
+
+/**
+    Update values for an existing configuration
+
+    @param {Object} values
+    @returns {Config}
+*/
+Config.prototype.updateValues = function(values) {
+    values = Immutable.fromJS(values);
+
+    return this.set('values', values);
+};
+
+/**
+    Update values for an existing configuration
+
+    @param {Config} config
+    @param {Object} values
+    @returns {Config}
+*/
+Config.prototype.mergeValues = function(values) {
+    var currentValues = this.getValues();
+    values = Immutable.fromJS(values);
+
+    currentValues = currentValues.mergeDeep(values);
+
+    return this.set('values', currentValues);
+};
+
 /**
     Create a new config for a file
 
@@ -120,19 +159,6 @@ Config.createWithValues = function(values) {
     });
 };
 
-/**
-    Update values for an existing configuration
-
-    @param {Config} config
-    @param {Object} values
-    @returns {Config}
-*/
-Config.updateValues = function(config, values) {
-    values = Immutable.fromJS(values);
-
-    return config.set('values', values);
-};
-
 
 /**
     Convert a keyPath to an array of keys

lib/output/generateBook.js

@@ -2,7 +2,6 @@ var path = require('path');
 var Immutable = require('immutable');
 
 var Output = require('../models/output');
-var Config = require('../models/config');
 var Promise = require('../utils/promise');
 var fs = require('../utils/fs');
 
@@ -41,7 +40,7 @@ function processOutput(generator, startOutput) {
                 var book = output.getBook();
                 var config = book.getConfig();
 
-                config = Config.updateValues(config, result);
+                config = config.updateValues(result);
                 book = book.set('config', config);
                 return output.set('book', book);
             }

lib/parse/__tests__/parseBook.js

@@ -27,6 +27,41 @@ describe('parseBook', function() {
         });
     });
 
+    it('should extend configuration for multilingual book', function() {
+        var fs = createMockFS({
+            'LANGS.md': '# Languages\n\n* [en](en)\n* [fr](fr)',
+            'book.json': '{ "title": "Test", "author": "GitBook" }',
+            'en': {
+                'README.md': 'Hello',
+                'book.json': '{ "title": "Test EN" }'
+            },
+            'fr': {
+                'README.md': 'Bonjour'
+            }
+        });
+        var book = Book.createForFS(fs);
+
+        return parseBook(book)
+        .then(function(resultBook) {
+            var books = resultBook.getBooks();
+
+            expect(resultBook.isMultilingual()).toBe(true);
+            expect(books.size).toBe(2);
+
+            var en = books.get('en');
+            var fr = books.get('fr');
+
+            var enConfig = en.getConfig();
+            var frConfig = fr.getConfig();
+
+            expect(enConfig.getValue('title')).toBe('Test EN');
+            expect(enConfig.getValue('author')).toBe('GitBook');
+
+            expect(frConfig.getValue('title')).toBe('Test');
+            expect(frConfig.getValue('author')).toBe('GitBook');
+        });
+    });
+
     it('should parse book in a directory', function() {
         var fs = createMockFS({
             'book.json': JSON.stringify({

lib/parse/parseConfig.js

@@ -1,7 +1,5 @@
 var Promise = require('../utils/promise');
-var Config = require('../models/config');
 
-var File = require('../models/file');
 var validateConfig = require('./validateConfig');
 var CONFIG_FILES = require('../constants/configFiles');
 
@@ -13,6 +11,7 @@ var CONFIG_FILES = require('../constants/configFiles');
 */
 function parseConfig(book) {
     var fs = book.getFS();
+    var config = book.getConfig();
 
     return Promise.some(CONFIG_FILES, function(filename) {
         // Is this file ignored?
@@ -38,13 +37,18 @@ function parseConfig(book) {
     })
 
     .then(function(result) {
-        var file = result? result.file : File();
         var values = result? result.values : {};
-
         values = validateConfig(values);
 
-        var config = Config.create(file, values);
-        return book.set('config', config);
+        // Set the file
+        if (result.file) {
+            config = config.setFile(result.file);
+        }
+
+        // Merge with old values
+        config = config.mergeValues(values);
+
+        return book.setConfig(config);
     });
 }