解决在 mac os 下终端无法显示 git 当前分支的情况

vi .bash_profile

# 若不存在，则新建
touch .bash_profile
vi .bash_profile

# Git branch in prompt.
function git_branch {
   branch="git branch 2>/dev/null | grep "</span>^*<span class="string">" | sed -e "</span>s/^* //<span class="string">""
   if [ "${branch}" != "" ];then
       if [ "${branch}" = "(no branch)" ];then
           branch="(git rev-parse --short HEAD...)"
       fi
       echo " ($branch)"
   fi
}
 
export PS1='[email protected] [ 33[01;36m]W[ 33[01;32m]$(git_branch)[ 33[00m] $ '