apply_add_decky's compose-up was hard-failing whenever the operator's
~/.docker/buildx/activity/ landed on a read-only mount — the wedge
detection in _compose_with_retry correctly refuses to retry (would
just leak more mounts), but for live materialisation we don't want a
wedged buildx state to abort an admin's mutation. ANTI hit it on
adding decky-a977: 'failed to update builder last activity time: ...
read-only file system → buildx wedge detected → returned non-zero'.
_compose_up_with_buildkit_fallback wraps _compose_with_retry: on a
CalledProcessError whose stderr matches both wedge signatures
(_BUILDX_WEDGE_SIGNATURE + _BUILDX_EROFS_SIGNATURE), it logs a
warning with the manual recovery steps + retries once with
DOCKER_BUILDKIT=0 set. The legacy non-buildx builder doesn't use
the activity dir and isn't affected.
Wired into the two paths that pass --build:
* _materialise_decky_spawn (apply_add_decky)
* _materialise_decky_services_diff (apply_update_decky service add)
_materialise_decky_recreate_base doesn't build — it just recreates a
container from an existing image — so it's not affected.
Operator-facing log message points at the manual fix
(rm -rf ~/.docker/buildx/activity + docker buildx create) so they
can recover at their leisure; we don't ATTEMPT the recovery because
the activity dir might be RO for a reason (zfs/btrfs snapshot, etc.)
that an automated rm would be wrong to fight.
anti
57e527534c