mac下安装protobuf环境问题小记_mac 安装protobuf

背景：

1、近些时间由python技术栈切入到go的技术栈，事情多了很多，没写过文章，刚好最近有空记录下自己mac上安装protobuf环境问题；

操作步骤：

一、源于grpc官网快速开始，安装protobuf环境；

本地环境声明：之前由于xcode觉得占了太多内存所以卸载了，后来没怎么在个人电脑上开发，所以没关注环境破坏情况，当需要使用时候发现又点糟糕；

首先grpc官网指导安装protobuf命令如下：

按照官网指导就碰到了第一次提示，貌似本地git都不在了，还想用brew install protobuf，于是尝试了下git命令还再不提示如下：

dongchaodeMacBook-Pro:~ dongchao$ git
xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist
Use `sudo xcode-select --switch path/to/Xcode.app` to specify the Xcode that you wish to use for command line developer tools, or use `xcode-select --install` to install the standalone command line developer tools.
See `man xcode-select` for more details.
 
给了提示，于是进去看了一眼；
dongchaodeMacBook-Pro:~ dongchao$ man xcode-select

上述也提示了怎么解决，于是动手：

下载：xcode-select --install 
 
安装等待完成后终端git还是运行有问题，发现man xcode-select是有一个：xcode-select -r
重置记得使用sudo命令；

之后再次检查git命令已经ok，接下来我们继续装protobuf;

再次的异常：

dongchaodeMacBook-Pro:~ dongchao$ brew install protobuf
Updating Homebrew...
Traceback (most recent call last):
	10: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `<main>'
	 9: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `require_relative'
	 8: from /usr/local/Homebrew/Library/Homebrew/global.rb:28:in `<top (required)>'
	 7: from /usr/local/Homebrew/Library/Homebrew/global.rb:28:in `require'
	 6: from /usr/local/Homebrew/Library/Homebrew/os.rb:3:in `<top (required)>'
	 5: from /usr/local/Homebrew/Library/Homebrew/os.rb:21:in `<module:OS>'
	 4: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:58:in `prerelease?'
	 3: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `version'
	 2: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `new'
	 1: from /usr/local/Homebrew/Library/Homebrew/os/mac/version.rb:26:in `initialize'
/usr/local/Homebrew/Library/Homebrew/version.rb:368:in `initialize': Version value must be a string; got a NilClass () (TypeError)
 

然后继续解决：

dongchaodeMacBook-Pro:~ dongchao$ brew update-reset
 
更新后再次：
brew install protobuf
终于成功，接下来是继续按照grpc官网继续往下了；