Re: Canceling upgrade in svn_wc__wipe_postupgrade()

Philip Martin <philip.martin_at_wandisco.com> writes:

> The intention is that renaming the wc.db file makes the working copy a
> 1.7 working copy. At that stage running 'svn cleanup' will finish the
> upgrade.

There is a window between renaming the wc.db file and removing the 1.6
metadata by running the workqueue to completion. During this time the
working copy is a 1.7 working copy but the user could use a 1.6 client
on it.

Removing the 1.6 metadata takes time, I don't know if it is possible to
make it closer to 'atomic'. I think it would help if the workqueue
wrote the top level .svn/format file earlier, but that would not stop a
1.6 client operating on a subdir. I suppose the workqueue could even
write .svn/format files through the whole working copy, before removing
the .svn subdirs.

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