在外部脚本变量的声明 [英] Declaring variables in external script

问题描述

我绑写它使用在另一个脚本中声明的变量的脚本。
我试过到目前为止使用导出来定义环境变量或只使用本地的。

I'm tying to write a script which uses variables declared in another script. I've tried so far using export to define environmental variables or just using local ones.

所以，我有我的配置脚本：

So I have my config script:

export DIR_STORAGE="/var/storage/"

和脚本试图在同一目录中使用它：

And script trying to use it in the same directory:

source conf.sh
echo "DIR="${DIR_STORAGE}

但似乎并没有工作。我该如何解决这个问题？

but that doesn't seem to work. How can I fix this?

推荐答案

即使你有在同一目录下两个文件，​​源conf.sh 将寻找的conf。 SH在当前目录的。例如：

Even if you have both files in the same directory, source conf.sh will look for conf.sh in the current directory. For example:

SHELL$ pwd
/home/user

SHELL$ ls mydir/
script.sh conf.sh

SHELL$ mydir/script.sh
script.sh: line 1: conf.sh: No such file or directory

在这种情况下，该脚本将寻找'conf.sh在当前的（家）目录，而不是在MYDIR。

In this case, the script will look for 'conf.sh' in the current (home) directory, not under mydir.

要避免这一点，总是寻找在剧本同一目录下的配置文件，常见的做法是使用：

To avoid this and always look for the config file in the same directory where the script is, a common practice is to use:

source "$(dirname $0)/conf.sh"

这将提取从用来调用脚本并追加config文件名给它的命令路径;在上面的例子中，这将成为源MYDIR / conf.sh这应该很好地工作。

This will extract the path from the command you used to invoke the script and append the config file name to it; in the example above, this will become source "mydir/conf.sh" which should work fine.

P.S。如果你使用源有没有必要导出的任何变量。

P.S. If you use source there's no need to export any variables.

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