今天在编译eos源码的时候一直报如下错误。
fatal: destination path 'mongo-cxx-driver' already exists and is not an empty directory.
Unable to clone MongoDB C++ driver at this time.
Exiting now.
我猜想可能跟我通过brew手动安装了一些库有关，因而我尝试清除掉所有brew已经安装的软件来解决这个问题，具体操作如下：
删除brew库
cd `brew --prefix`
$ rm -rf Cellar
$ brew prune
$ rm -rf Library .git .gitignore bin/brewREADME.mdshare/man/man1/brew
$ rm -rf ~/Library/Caches/Homebrew
重装brew
ruby -e "$(curl -fsSL/Homebrew/install/master/install)"
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