Every backup now writes vaultik-destination.txt at the root of the
backup destination store. While the local index holds snapshots, a
destination without it is not present: snapshot create refuses before
writing, prune and snapshot purge fail, and snapshot list and snapshot
remove warn, as for a destination that cannot be listed. remote nuke
deletes the marker last. The file:// backend no longer creates its
destination directory and checks for it on every write.
Tests that backed up into a directory they never created now use an
existing one; fixtures standing for a written destination carry the
marker.
Judgement call: the marker is rewritten on every backup.
Deviation: snapshot name selection moved out of CreateSnapshot unchanged, for the complexity limit.
Model: opus-5-5
A file that phase 1 of a backup counted and phase 2 could not open,
because it was unreadable under --skip-errors or removed in between,
was added to the unchanged count while its size stayed in
BytesScanned. The summary showed it as unchanged with its bytes backed
up, and the snapshots row's file_count and total_size included it.
The scanner now counts such a file in FilesFailed and takes its size
out of BytesScanned. The summary's files line adds "N failed", and
file_count leaves the file out.
A directory phase 2 cannot record is not counted as failed, since
phase 1 counts no directories; that case has no test.
Model: opus-5-5
sneak
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