前几天写的​​七牛​​​的参赛demo，用bash写了一个便捷安装的脚本，涉及到了路径相关的判断，从​​stackoverflow​​，加上自己的实践整理一下。

简单版

下面是一个最简单的实现，可以解决大多数问题，缺陷是对于软链接显示的是软链接所在的目录


lineos:false 

#!/bin/bash
DIR="$( cd "$( dirname "$0"  )" && pwd  )"

完善版

这个版本解决了使用​​ln -s target linkName​​创造软链接无法正确取到真实脚本的问题。


lineos:false 

#!/bin/bash
SOURCE="$0"
while [ -h "$SOURCE"  ]; do # resolve $SOURCE until the file is no longer a symlink
    DIR="$( cd -P "$( dirname "$SOURCE"  )" && pwd  )"
    SOURCE="$(readlink "$SOURCE")"
    [[ $SOURCE != /*  ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
DIR="$( cd -P "$( dirname "$SOURCE"  )" && pwd  )"