#243 normalised the incoming path but compared it against the value read
raw from the database, so a root stored with a trailing separator never
compared equal. Every edit of it -- a policy change included -- took the
relocation branch, where each planned destination is its own source and
the pre-check refuses. That root could not be edited at all.
`update` now normalises both sides, and hands `relocate_root` the
normalised stored value. `path_is_free` normalises the stored side in SQL
and `create` goes through it too, so `/mnt/x` and `/mnt/x/` cannot be two
roots for one directory -- the unique index compares raw strings and
cannot see that.
Migration 0031 strips the separator from rows already written. It skips
any row whose stripped form another row would also hold, rather than
tripping the unique index: a migration that cannot apply stops the daemon
booting, which is worse than two roots naming one directory.
Also from the same review: `undo` recorded only the leaf directory, so a
failed move into `/mnt/media-v2/tv/kids` left `tv` behind. It now records
every level `create_dir_all` materialised, deepest first, and still never
touches one that was already on disk.
Refs #244.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Miguel Palhas
c4d4ade4da