MacOS 12.3后删除python的问题

MacOS 12.3 把自带python删除了。bundle打包fsevents依赖报错
以为多难的问题，走了不少弯路。。。

> fsevents@1.2.13 install /Users/admin/jenkins/workspace/sit-saas-app-ios/saasDashboard/node_modules/fsevents
> node install.js

gyp info it worked if it ends with ok
gyp info using node-gyp@3.8.0
gyp info using node@12.4.0 | darwin | x64
gyp ERR! configure error 
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
gyp ERR! stack     at PythonFinder.failNoPython (/usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:484:19)
gyp ERR! stack     at PythonFinder.<anonymous> (/usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:406:16)
gyp ERR! stack     at F (/usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/which/which.js:68:16)
gyp ERR! stack     at E (/usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/which/which.js:80:29)
gyp ERR! stack     at /usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/which/which.js:89:16
gyp ERR! stack     at /usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/isexe/index.js:42:5
gyp ERR! stack     at /usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/isexe/mode.js:8:5
gyp ERR! stack     at FSReqCallback.oncomplete (fs.js:165:21)
gyp ERR! System Darwin 21.4.0
gyp ERR! command "/usr/local/node-v12.4.0/bin/node" "/usr/local/node-v12.4.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/admin/jenkins/workspace/sit-saas-app-ios/saasDashboard/node_modules/fsevents
gyp ERR! node -v v12.4.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok 

解决方法

安装python2.7
python官网下载2.7.18版本，安装即可。

无用的实践（不用看了，仅做记录）

• 安装python2.7

//优先安装wget
brew install wget

//安装python2.7
wget http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tgz

//双击解压后
cd Python-2.7.3
./configure
make
make altinstall

//后发现为exe，卸载
make distclean    //uninstall/distclean/veryclean

• 安装python3

brew install python3
//版本不对后卸载
brew uninstall python3

2.关联到环境变量python
由于新系统权限问题，ln -s未能修改成功
ln -s /usr/bin/python3 /usr/bin/python
尝试修改.bash_profile

vi ~/.bash_profile

//./bash_profile 添加以下代码
export PATH="/usr/local/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/bin:${PATH}"
export PATH="/usr/local/opt/python@3.9/bin:${PATH}"
alias python="/usr/local/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/bin/python3.9"

//生效文件
source ~/.bash_profile

参考文章：
python环境变量修改
安装不同版本python