bash 中的访问修饰符

access modifiers in bash

假设我有一个 bash 脚本,我希望一些变量在获取时出现,而其他变量只能从脚本中访问(函数和变量)。实现这一目标的惯例是什么?

假设 test.sh 是您的 bash 脚本。

你可以做的是提取所有常见项目并将它们放入 common.sh 中,其他脚本可以获取这些项目。

BASH_SOURCE 数组在此处帮助您:

考虑这个脚本,source.sh

#!/bin/bash
if [[ ${BASH_SOURCE[0]} == "[=10=]" ]]; then
    # this code is run when the script is _executed_
    foo=bar

    privFunc() { echo "running as a script"; }

    main() {
        privFunc
        publicFunc
    }
fi

# this code is run when script is executed or sourced
answer=42
publicFunc() { echo "Hello, world!"; }

echo "[=10=] - ${BASH_SOURCE[0]}"

[[ ${BASH_SOURCE[0]} == "[=10=]" ]] && main

运行它:

$ bash source.sh
source.sh - source.sh
running as a script
Hello, world!

采购:

$ source source.sh
bash - source.sh
$ declare -p answer
declare -- answer="42"
$ declare -p foo
bash: declare: foo: not found
$ publicFunc
Hello, world!
$ privFunc
bash: privFunc: command not found
$ main
bash: main: command not found