Is this possible with tortoiseSVN?:
Always freeze svn:externals
for tags
the scenario is our trunk will always use the \'HEAD\' revision for externa
The recommended best practice is to always use an explicit revision (not HEAD) in externals definitions. From the documentation:
You should seriously consider using explicit revision numbers in all of your externals definitions. Doing so means that you get to decide when to pull down a different snapshot of external information, and exactly which snapshot to pull. … For software projects, this could be the difference between a successful and a failed build of an older snapshot of your complex codebase.
To directly answer your question: no, it’s not possible to automatically change the externals definitions when tagging using TortoiseSVN. It will have to be done manually when creating the tag.