June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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124
第
5
章
自动代码生成
在本章中我们将学习如何在
Go
语言项目中使用
Kubernetes
的代码生成器来
编写自定义资源相关的代码。在
Kubernetes
原生资源的代码中广泛使用了代
码生成器技术，我们也将使用与之相同的代码生成器来生成代码框架。
5.1
为何需要代码生成器
Go
语言从设计之初就定位于是一门相对简单的语言。它缺少一些高层的抽象，
也没有类似“泛型”（即类型无关）这种使用相同代码处理不同数据类型的
元编程机制。解决这类问题在
Go
语言中的标准做法就是使用一个外部的代码
生成器。
在
Kubernetes
项目早期，越来越多的资源类型被添加到这个系统中，造成了
越来越多的代码需要被重写。有了代码生成器以后，维护这部分代码的工作
就变得简单很多。起初，
Kubernetes
开发了
Gengo
库，最后基于
Gengo
又开
发了
k8s.io/code-generator
，它提供了一组可以在外部使用的代码生成器。在
下面的章节中，我们会使用这些代码生成器来生成自定义资源相关的代码。
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