如何扩展环境变量里面的字符串从文件读取？ [英] How to expand environment variable inside string read from file?

问题描述

我有一个包含路径列表的文件。其中一些可能包括环境变量，例如％USERPROFILE％。

示例：

 ％USERPROFILE％\dir 
 C：\another\dir 
  

然后我使用这段代码读取所有的行并连接到; （可以使用cat和tr命令因为git）：

  set include_file = C：\path\to\file.txt 
 / fdelims =%% i in（'cat％include_file％^ | tr\\\\
;'）do set include_content = %% i 
  / pre> 
 
 
这将创建一个变量，其中包含字符串％USERPROFILE％\dir; C：\another\dir  
通常运行 echo％USERPROFILE％会给你一些类似 C：\Users\xxx\dir 但运行它与％include_content％只是输出原始字符串而不展开％USERPATH％ 
 
 
 
我的最终计划是添加directo这样我的PATH就像这样设置PATH =％include_content％;％PATH％，但这不起作用，因为变量没有展开。
 
 
 
我的问题是我可以以某种方式扩展字符串中的变量，以便将真实的目录添加到路径中？
解决方案
您可以使用 CALL 重新排序一行。 
 
 
 
所以这应该做这个工作
  call setinclude_content = ％include_content％
  
 for循环
 
I have a file with a list of paths. Some of them might include environment variables such as %USERPROFILE%.

Example:
%USERPROFILE%\dir
C:\another\dir
I'm then reading all the lines and concatenating with ; using this code (the cat and tr commands are available because of git):
set include_file=C:\path\to\file.txt
for /f "delims=" %%i in ('cat %include_file% ^| tr "\\n" ";"') do set include_content=%%i
This creates a variable with the string %USERPROFILE%\dir;C:\another\dir
Normally running echo %USERPROFILE% would give you something like C:\Users\xxx\dir but running it with %include_content% just outputs the original string without expanding %USERPATH%

My final plan is to add the directories to my PATH like this set PATH=%include_content%;%PATH% but this doesn't work since the variable isn't expanded.

My question is can I somehow expand the variables in the string so that the real directories get added to the path?
解决方案
You can reparse a line by using CALL.  

So this should do the job
call set "include_content=%include_content%"
After the for loop

                        
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