找出 bash 中最后设置环境变量的位置
好吧，我知道有一个 bash 调试器。但我正在寻找的是，如果我的启动脚本之一中有一个环境变量，并且我不知道它是如何设置的或它可能在哪里，除了详尽地搜索脚本之外，还有其他方法可以找到它吗？
我的意思是有没有一种机制/工具可以提供这样的东西？ bash 是否跟踪变量设置位置？
尽管这看起来似乎不是很重要，但有一天，当我帮助朋友安装 OpenCL 时，我突然想到了这个问题，并且该包应该自动设置变量 $ATISTREAMSDKROOT 。无论如何，该包应该向 /etc/profile.d 添加一个文件以允许设置变量，但事实并非如此。幸运的是，该变量显示为空白。
但我想知道如果它没有显示为空白，并且该包将其添加到某个随机文件中，除了寻找它之外，我可能无法知道它在哪里。
当然，我知道人们可以编写一两个 sed 命令并搜索脚本，但我会考虑进行详尽的搜索：D
Okay I know there is a bash debugger. But what I'm seeking is if I had an environment variable in one of my startup scripts and I don't know how it was set or where it might be, is there a way to find it other than exhaustively searching the scripts?
I mean is there a mechanism/tool that provides such a thing? Does bash keep track of variable setting locations?
Even though this might not seem very important but it crossed my mind the other day when I was helping a friend install OpenCL and the package supposedly set the variable $ATISTREAMSDKROOT automatically. Anyway the package was supposed to add a file to /etc/profile.d to allow for setting the variable, but it didn't. And luckily the variable came out blank.
But I was wondering if it hadn't come out blank, and the package added it to some random file, I would have probably had no way of telling where it is other than looking for it.
Of course I know one could write a sed command or two and search through the scripts but I'd consider that exhaustive search :D
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一种选择是使用以下命令启动 bash 实例：
... 并查找该输出中设置变量的位置。要将输出重定向到文件，您可以执行以下操作：
您应该在输出中看到每个文件的来源。
One option would be to start an instance of bash with:
... and look for where the variable is set in that output. To redirect that output to a file, you could do:
You should see in the output where each file is sourced.