Anchoring the rotation on the newest directory name let the VPS steer
it: one future-dated directory (VPS clock off, or a VPS gone rogue)
pushed the window forward and deleted every real backup, with exit 0
and an ok report. Two more inputs from the outbox could do harm: rsync
-rt rewrote an already pulled .age whenever the VPS served another
version, and an impossible dated name (2026-13-45) failed `date -d`
under set -e, stopping every later pass for good.
- latest is the newest valid dated directory not after today; the
rotation keeps it and the 29 days before it;
- a name is dated only if `date` gives it back unchanged (busybox turns
2026-02-30 into 2026-03-02); an invalid or future name is logged,
never counted, never removed, and the pass goes on;
- --ignore-existing: a pulled file is never rewritten. The VPS writes a
.tmp and renames it, and the filter drops the .tmp.
Refs maximus/la-compagnie-maximus#220
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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