组件编译器

定制组件编译器都遵循与页编译器相同的模型，可以为部分布局、定制组件和内容布局创建该编译器。

编译过程中，cec compile-template 命令将在与组件的 render.js 文件相同的位置查找 compile.js 文件：

src
- components
  - <yourComponent>
    - assets
      - render.js
      - compile.js

如果此文件不存在，将不编译组件并将在运行时呈现组件。

如果该文件确实存在，它需要实施 compile() 接口，其返回 Promise。例如，以下 Starter-Blog-Author-Summary 是定制内容布局编译器：

var fs = require('fs'),
path = require('path'),
mustache = require('mustache');

var ContentLayout = function (params) {
    this.contentClient = params.contentClient;
    this.contentItemData = params.contentItemData || {};
    this.scsData = params.scsData;
};

ContentLayout.prototype = {
    contentVersion: '>=1.0.0 <2.0.0',

    compile: function () {
        var compiledContent = '',
            content = JSON.parse(JSON.stringify(this.contentItemData)),
            contentClient = this.contentClient;

         // Store the id
         content.fields.author_id = content.id;

         if (this.scsData) {
             content.scsData = this.scsData;
             contentType = content.scsData.showPublishedContent === true ? 
'published' : 'draft';            
             secureContent = content.scsData.secureContent;
        } 

        // calculate the hydrate data
        content.hydrateData = JSON.stringify({
            contentId: content.id,
            authorName: content.fields['starter-blog-author_name']
        });

        try {
            // add in style - possible to add to <head> but inline for 
simplicity
            var templateStyle = fs.readFileSync(path.join(__dirname,
'design.css'), 'utf8');
            content.style = '<style>' + templateStyle + '</style>';
 
            var templateHtml = fs.readFileSync(path.join(__dirname,
'layout.html'), 'utf8');
            compiledContent = mustache.render(templateHtml, content);
        } catch (e) {
            console.error(e.stack);
        }

        return Promise.resolve({
            content: compiledContent,
            hydrate: true // note that we want to hydrate this component using the render.js hydrate() function. This is required for when the user clicks on the author
        });
    }
};

module.exports = ContentLayout;