bash 删除变量末尾的斜线
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Remove slash from the end of a variable
提问by Burntime
the bash auto completion make a / at the end of a directory how i can strip this out?
bash 自动完成在目录末尾创建一个 / 我如何去掉它？
Thanks for hints.
谢谢你的提示。
#!/bin/sh
target=
function backup(){
date=`date "+%y%m%d_%H%M%S"`
PWD=`pwd`
path=$PWD/$target
tar czf /tmp/$date$target.tar.gz $path
}
backup
回答by Gregory Pakosz
Use target=${1%/}
用 target=${1%/}
See this the parameter substitution of this bash scripting guidefor more.
有关更多信息，请参阅此bash 脚本指南的参数替换。
回答by amenzhinsky
I think better solution to canonize paths is realpath $pathor with -moption if it doesn't exist.
This solution automaticaly removes unnecessary slashes and adds pwd
我认为更好的规范路径的解决方案是realpath $path或者-m如果它不存在的话。此解决方案会自动删除不必要的斜杠并添加密码
回答by John P. Fisher
Be careful, bash3 added perl-similar regex to bash. The guide mentioned covers this as well as the official guide at GNU, but not all references do.
小心，bash3 向 bash 添加了与 perl 类似的正则表达式。提到的指南涵盖了这一点以及GNU的 官方指南，但并非所有参考资料都如此。
What did I do?
我做了什么？
Substitute 2.19/*to be 2.19.
替代2.19/*为2.19。
Solution
解决方案
VER="2.19/foo-bar"
NEWVER=${VER%/*}
