为 shell 脚本提供参数和帮助部分 [英] Giving a parameter and help section to shell script

问题描述

我有一个问题，我想手动确定文件夹名称.例如，如果用户按如下方式运行此脚本，

I have a problem that I want to determine folder name manually. For example, if user runs this script as below,

./scriptname -k 

他们可以获取结果，但文件夹名称是在脚本中确定的.如何手动确定文件夹名称，如下所示?

They can take the results, but folder names are determined in script. How can I determine folder name manually as below?

推荐答案

你可以把帮助写成一个函数:

You could write the help as a function:

usage(){
cat <<EOT
Usage: ${0##*/} dir1 dir2
EOT
}

if [ $# -ne 2 ]; then
    usage
    echo 'please enter two folder names'
    exit 1
fi

if [ ! -d "$1" ]; then
    usage
    echo "$1 is not a folder"
    exit 1
fi

if [ ! -d "$2" ]; then
    usage
    echo "$2 is not a folder"
    exit 1
fi

# continue script

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