Q:

svn:ignore exclude a file from being ignored

I have a directory which contains files with various extensions.  I would like to do the equivalent of the following .gitignore code in svn:ignore:  
*.* #  ignore everything
! .htaccess # except this file

How do I achieve this in svn:ignore? 

A:

If you've already added the .htaccess file to SVN control, then it won't matter.  You will always see changes to that file.  The only time the ignore list comes into play is for files which have not yet been added to the repository.  You can ignore everything in the directory globally and still add the .htaccess file to SVN control and see modifications, etc.