brew安装包报错：fatal: not in a git directory_brew fatal: not in a git directory

具体报错：

fatal: not in a git directory

Error: Command failed with exit 128: git

解决办法：

输入brew -v，发现错误：在存储库中检测到可疑的所有权。

//由于文件或目录的所有权设置不正确而导致的
fatal: detected dubious ownership in repository at '/opt/homebrew/Library/Taps/homebrew/homebrew-core'
To add an exception for this directory, call: 
 
	git config --global --add safe.directory /opt/homebrew/Library/Taps/homebrew/homebrew-core
Homebrew/homebrew-core (no Git repository)
 
 
fatal: detected dubious ownership in repository at '/opt/homebrew/Library/Taps/homebrew/homebrew-cask'
To add an exception for this directory, call:
 
	git config --global --add safe.directory /opt/homebrew/Library/Taps/homebrew/homebrew-cask

输入git开头的两行再brew -v。然后就可以安装其他包了。

可能的原因：

可能是因为用国内源下载导致的。/opt/homebrew/Library/Taps/homebrew/homebrew-core和/opt/homebrew/Library/Taps/homebrew/homebrew-cask是Homebrew使用的两个存储库（repositories），它们包含Homebrew的核心公式（Formula）和Cask公式。没有他们的使用权限就无法下载。