Two halves: the ladder could not climb the commonest versioning scheme,
and nothing ever climbed it on its own.
The ladder stepped by bumping a tag's LAST numeric component, so
v1.158.0 went v1.158.1, v1.158.2, … and never arrived at v1.159.0. It
then failed closed, refusing to build a path. Synapse publishes
v1.159.0 and no v1.158.1 at all, so Matrix could not be laddered by the
button either — three-part semver minor bumps were simply unreachable.
updaterNextRung now considers a bump of every component, keeps the
candidates that exist upstream and takes the smallest: the next release
by definition, whether it lands in the patch position or crosses into a
new major. Shape discipline is unchanged, so 31-fpm-alpine still never
becomes 31-apache, and each rung is still probed, so none can be
skipped. updaterTagBumpAt moves here from the scan, its natural home,
which also breaks a source cycle.
updaterUpgradeAuto then climbs at most ONE rung per app per calendar
day, inside the install window, for apps set to auto. One rung because a
ladder run unattended can be several migrations deep before anyone
looks, and "restore the snapshot from a minute ago" stops comforting
once four have stacked; one a day so there is time to notice. It crosses
a major if that is genuinely the next release — refusing would strand an
app on the last version of its line forever — but one step at a time,
never as a leap. Two stamps: the target rung (a failure is not retried
until something newer ships) and the day.
Every rung goes through updaterUpgradeApp unchanged, so GATE 1 still
refuses any app without a real verifier, and the per-rung contract is
identical to the button: snapshot fail-closed, set version, pull, up,
verify, restore that rung and stop on any failure. History now records
the trigger instead of hardcoding "manual", including on the rollback
paths. CFG_UPDATER_LADDER_AUTO gates the whole thing separately from
CFG_UPDATER_AUTO, because "keep my apps patched" and "move my apps
between versions unattended" are different appetites for risk.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
64344bc5dc