Upgrading a WC to single-DB: upgrade_to_wcng() calls
svn_wc__db_upgrade_begin() to create a new DB, and then svn_wc__db_wclock_obtain() and then svn_wc__write_upgraded_entries() The _wclock_obtain() fails because it checks that the node with relpath "" exists. Normally in libsvn_wc a new DB is created with svn_wc__db_init() which inserts a row for relpath "", but svn_wc__db_upgrade_begin() doesn't. What's the best solution here? Not lock it? Have svn_wc__db_upgrade_begin() create an initial "" row? Have svn_wc__db_wclock_obtain() NOT check for existence of a "" row? The first and last options don't sound right. Creating an initial "" row does sound right, and requires (presumably) a modification of svn_wc__write_upgraded_entries(). - Julian
