前言
我在上周的DX分享介绍中，提到过DX的核心就是面向package（包包）的开发模式。同学要像更快的上手DX，就一定要掌握 Package Development Model 。
今天为各位开始学DX的同学带来的就是Trailhead 中
Package Development Model 这个module 的导读。希望能帮助大家快速掌握这一DX的核心概念。
想下新的真理之源 Imagine a New Source of Truth
包开发的好处：
- Improving team development and collaboration.
- Modular development process with specification of dependencies among packages.
- Versioning to help with change management
- Facilitating automated testing and continuous integration.
- Making the release cycle more efficient and agile.
- Improved version control system (VCS) synchronization through change-tracking of Setup features
- More fine-grained visibility and clarity into the change management of your production org
这章主要需要理解包开发是如果提供灵活性的，相对于原来的基于Org的开发模式。
使用集成工具提高效率 Increase Productivity with Integrated Tools
介绍了 CLI, VS Code ， VCS, Scratch Org
Scratch Org 的做用：
- Start a new project.
- Start a new feature branch.
- Test a new feature.
- Start automated testing.
- Perform development tasks directly in an org.
- Start from “scratch” with a fresh new org.
了解代码驱动开发 Understand Source-Driven Development
Your source is organized into packages based on a group of features or customizations you want to deliver together. The Salesforce DX project reflects this package-based approach to organizing your source.
这节主要围绕 Scratch 对代码驱动开发的一些流程做了介绍。一定不要错过。
学习如果测试，构建，发布DX项目 Learn How to Test, Build, and Release with Salesforce DX
应用部署
主要围绕这张图在讲。
计划移动到包开发 Plan Your Move to Packages
对把已有项目迁移到包开发模式提出了相关建议。仅供参考。
