Question

svn add guess_language/
svn: warning: 'guess_language' is already under version control

Why is this? When I downloaded it, it was under SVN. (I downloaded it from SVN)
How do I release that svn…so that I can turn it into a regular directory?

Answer 1

Remove the .svn directory inside guess_language/ and it’s parent (if that also came from another SVN repository). This should allow you to add it to another SVN repository.

This also must be done recursively through guess_language‘s children. A command which can do this for you (depending on your Linux environment) is:

find . -name '.svn' -type d -exec rm -rf {} \;

(You probably shouldn’t just take that for granted, test it with a non-deleting version, i.e find . -name '.svn' -type d and check the only directories listed are the ones you want to remove.)