Mac zsh环境下which python路径异常与node-gyp报错问题

目标 #

让which python命令返回/usr/bin/python2.7，且该路径对应的可执行文件能正常运行。

当前问题 #

• which python当前错误返回：

  /Library/Frameworks/Python.framework/Versions/2.7/bin/python
  

• echo $PYTHON能正确返回/usr/bin/python2.7，但which命令结果未符合预期
• 使用zsh shell，已执行source ~/.zshrc并重启电脑，问题依旧

环境信息 #

系统PATH输出 #

/Users/myname/.nvm/versions/node/v16.16.0/bin:/usr/bin:/Users/myname/.sdkman/candidates/java/current/bin:/Users/myname/.nvm/versions/node/v16.16.0/bin:/usr/bin/python2.7:/Library/Frameworks/Python.framework/Versions/2.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/myname/tools/apache-maven-3.8.1/bin:/Users/myname/tools/apache-maven-3.8.1/bin

.zshrc中的相关配置 #

export PYTHON="/usr/bin/python2.7"
export PATH="$PYTHON:$PATH"

.zshrc完整内容 #

export PYTHON="/usr/bin/python2.7"
export PATH="$PYTHON:$PATH"

# Believe only the above 2 lines is relevant. Leaving the rest in just in case.

export M2_HOME=/Users/name/tools/apache-maven-3.8.1
export PATH=$PATH:$M2_HOME/bin
export NODEJS_ORG_MIRROR=https://myserver-proxy
export NVM_NODEJS_ORG_MIRROR=$NODEJS_ORG_MIRROR
export NODE_ENV=development
export NODE_CERTS="/Users/name/certs.pem"

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

export ZSH="$HOME/.oh-my-zsh"
ZSH_THEME="robbyrussell"
plugins=(git)
source $ZSH/oh-my-zsh.sh

#THIS MUST BE AT THE END OF THE FILE FOR SDKMAN TO WORK!!!
export SDKMAN_DIR="$HOME/.sdkman"
[[ -s "$HOME/.sdkman/bin/sdkman-init.sh" ]] && source "$HOME/.sdkman/bin/sdkman-init.sh"
export JETBRAINS_LICENSE_SERVER="http://jetbrains.something.com:443"

更新排查信息 #

执行ls -lah /usr/bin/python2.7返回：

ls: /usr/bin/python2.7: No such file or directory

但进入/usr/bin目录后，输入python2.7可以正常打开交互式Python shell。

触发问题的场景 #

安装Node项目时出现node-gyp报错，具体信息如下：

gyp info using node-gyp@3.8.0
gyp info using node@14.18.2 | darwin | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "/usr/bin/python2.7" in the PATH
gyp verb `which` failed Error: not found: /usr/bin/python2.7
gyp verb `which` failed     at getNotFoundError (/Users/name/projects/fe/aa/node_modules/which/which.js:13:12)

gyp ERR! configure error 
gyp ERR! stack Error: Can't find Python executable "/usr/bin/python2.7", you can set the PYTHON env variable.

疑问 #

请问我遗漏了什么配置？

内容的提问来源于stack exchange，提问作者karvai