Generate multi-lingual index

lib/output/ebook.js

@@ -159,4 +159,9 @@ EbookOutput.prototype.ebookConvertOption = function() {
     });
 };
 
+// Don't write multi-lingual index for wbook
+EbookOutput.prototype.outputMultilingualIndex = function() {
+
+};
+
 module.exports = EbookOutput;

lib/output/website.js

@@ -210,11 +210,30 @@ WebsiteOutput.prototype.finish = function() {
     .then(function() {
         if (that.book.isLanguageBook()) return;
         return that.plugins.copyResources(that.name, that.resolve('gitbook'));
+    })
+
+    // Generate homepage to select languages
+    .then(function() {
+        if (!that.book.isMultilingual()) return;
+        return that.outputMultilingualIndex();
     });
 };
 
 // ----- Utilities ----
 
+// Write multi-languages index
+WebsiteOutput.prototype.outputMultilingualIndex = function() {
+    var that = this;
+
+    return that.render('languages', that.getContext())
+    .then(function(html) {
+        return that.writeFile(
+            'index.html',
+            html
+        );
+    });
+};
+
 // Render a template using nunjucks
 // Templates are stored in `_layouts` folders
 WebsiteOutput.prototype.render = function(tpl, context) {

test/mock.js

@@ -84,6 +84,22 @@ function outputDefaultBook(Output, files, summary, opts) {
     });
 }
 
+// Output a book with a specific generator
+function outputBook(Output, files, opts) {
+    return setupBook(files, opts)
+    .then(function(book) {
+        // Parse the book
+        return book.parse()
+
+        // Start generation
+        .then(function() {
+            var output = new Output(book);
+            return output.generate()
+                .thenResolve(output);
+        });
+    });
+}
+
 // Log an error
 function logError(err) {
     console.log(err.stack || err);
@@ -93,6 +109,7 @@ module.exports = {
     fs: nodeFS,
     setupFS: setupFS,
     setupBook: setupBook,
+    outputBook: outputBook,
     setupDefaultBook: setupDefaultBook,
     outputDefaultBook: outputDefaultBook,
     logError: logError

test/output-website.js

@@ -25,7 +25,6 @@ describe('Website Output', function() {
         it('should correctly copy plugins', function() {
             output.should.have.file('gitbook/gitbook-plugin-highlight/website.css');
         });
-
     });
 
     describe('Book with chapters', function() {
@@ -58,7 +57,42 @@ describe('Website Output', function() {
             output.should.have.file('hello/index.html');
             output.should.have.file('hello/test.html');
         });
+    });
 
+    describe('Multilingual Book', function() {
+        var output;
+
+        before(function() {
+            return mock.outputBook(WebsiteOutput, {
+                'LANGS.md': '# Languages\n\n'
+                    + '* [en](./en)\n'
+                    + '* [fr](./fr)\n\n',
+                'en/README.md': '# Hello',
+                'fr/README.md': '# Bonjour'
+
+            })
+            .then(function(_output) {
+                output = _output;
+            });
+        });
+
+        it('should correctly generate an index.html for each language', function() {
+            output.should.have.file('en/index.html');
+            output.should.have.file('fr/index.html');
+        });
+
+        it('should correctly copy assets', function() {
+            output.should.have.file('gitbook/app.js');
+        });
+
+        it('should not copy assets for each language', function() {
+            output.should.have.not.file('en/gitbook/app.js');
+            output.should.have.not.file('fr/gitbook/app.js');
+        });
+
+        it('should correctly generate an index.html', function() {
+            output.should.have.file('index.html');
+        });
     });
 
 });