function preparePlugins(output) {
    var book = output.getBook();

    return Promise()

    // Only load plugins for main book
    .then(function() {
        if (book.isLanguageBook()) {
            return output.getPlugins();
        } else {
            return Plugins.loadForBook(book);
        }
    })

    // Update book's configuration using the plugins
    .then(function(plugins) {
        return Plugins.validateConfig(book, plugins)
        .then(function(newBook) {
            return output.merge({
                book: newBook,
                plugins: plugins
            });
        });
    });
}
function preparePlugins(output) {
    var book = output.getBook();

    return Promise()

    // Only load plugins for main book
    .then(function() {
        if (book.isLanguageBook()) {
            return output.getPlugins();
        } else {
            return Plugins.loadForBook(book);
        }
    })

    // Update book's configuration using the plugins
    .then(function(plugins) {
        return Plugins.validateConfig(book, plugins)
        .then(function(newBook) {
            return output.merge({
                book: newBook,
                plugins: plugins
            });
        });
    });
}
function preparePlugins ( output ) { var book = output . getBook ( ) ; return Promise ( ) // Only load plugins for main book . then ( function ( ) { if ( book . isLanguageBook ( ) ) { return output . getPlugins ( ) ; } else { return Plugins . loadForBook ( book ) ; } } ) // Update book's configuration using the plugins . then ( function ( plugins ) { return Plugins . validateConfig ( book , plugins ) . then ( function ( newBook ) { return output . merge ( { book : newBook , plugins : plugins } ) ; } ) ; } ) ; }
Load and setup plugins

@param {Output}
@return {Promise<Output>}
Load and setup plugins
Prepare plugins for the book