variable in variable cmd bat

Question

I import variables from config.txt to my .bat file.

The following is the content of my config.txt:

param1 = %LOCALAPPDATA%\Programs  
param2 = %LOCALAPPDATA%\Programs\Myfolder

This is my .bat file content:

for /f "delims=" %%L in (config.txt) do set %%L  
echo %param1%

This outputs:

%LOCALAPPDATA%\Programs

But I want it to output:

C:\Users\Alaska\AppData\Local\Programs

Answer 1

If you want another round of variable expansion, use the call command.

If you need the variable to contain %LOCALAPPDATA%, then use it in front of the echo command:

for /f "delims=" %%L in (config.txt) do set %%L
call echo %param1%

If you want the variable to be expanded to its full value, use it in front of the set command:

for /f "delims=" %%L in (config.txt) do call set %%L
echo %param1%