I have hosted my code on code.google.com. I selected subversion as the repository to be used and have checked-in all my code. I am trying to create a tag on the repository and I am unable to find any straightforward way to do this. Can someone please guide me as to what needs to be done to create a tag? Do I use some subversion command? Or is there something available in the UI in code.google.com to do this which I am overlooking?
Subversion supports tags only by convention. You should make a copy (svn cp) of your trunk branch to tags/foo and that's it. There is no special command.
So, for example:
svn cp https://PROJECT.googlecode.com/svn/trunk/ https://PROJECT.googlecode.com/svn/tags/TAG/