How do I embed variables as arguments to variables in Eclipse' external tools?

Question

I'm trying to configure an external tool for eclipse and I want to prompt the user to select a folder under his/her workspace. Eclipse provides a ${folder_prompt} variable that can be used, and it's second parameter is the starting directory. So, I thought I could do something like: ${folder_prompt:"Choose a Folder":${workspace_loc}} but this doesn't seem to work. Is there another way of doing this?

Answer 1

Your example works fine for me (as base directory entry in an external tool configuration). I suggest to look for other problems in your external tool configuration.