环境变量中的批处理文件变量

Question

I have a program named go.exe , and I pass it a file name example so that it can make a log file named example_golog.txt .

The problem here is that I want to only call the executable without explicitly giving a filename or making a user have to give a file name.

My solution to this was to name a system variable called GO whose value is go.exe %~n0 . What's wrong with this is instead of the %~n0 part getting the file name of the batch file that called it, my go.exe file just makes a text file called %~n0_golog.txt .

Is there any way around this so that %~n0 will do it's magic in the batch files that call it in go.exe %~n0 ?

EDIT:

My system variable: Name: GO Value: go %~n0

My test.bat file:

@echo on
%GO% 
pause

When I run test.bat , the %~n0 does not expand out.

So instead of test_golog.txt being made, %~n0_golog.txt is made

Answer 1

In your batch file, you can call it to dereference the variable.

echo %go% will report go %~n0 .

call echo %go% will report go test (from a batch file named test).

You can use whatever other sets you need from there.