https://stackoverflow.com/questions/3572030/bash-script-absolute-path-with-os-x
https://blog.youkuaiyun.com/robertsong2004/article/details/54809105
- 安装 coreutils
$ brew install coreutils - 在 .bash_profile 追加一个 function
function realpath() {
[[ $1 = /* ]] && echo “ 1 " ∣ ∣ e c h o " 1" || echo " 1"∣∣echo"PWD/${1#./}”
}
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