'box rm' deletes a box and every snapshot it has; 'box new --from' clones,
but the clone still lives on the same host. Nothing a box held could outlive
a teardown — which made #66's upgrade refusal honest but lossy. This adds
the way out and the way back:
- box export <box> [<file>] [--instance-only]: wraps 'incus export' into one
portable backup tarball (default <box>-<UTC stamp>.tar.gz), snapshots
included by default. Requires the box stopped (require_stopped grew an
honest reason parameter: export is down by OUR decision, not incus's).
Credentials are SHOUTED, not scrubbed — the artifact carries the box's
whole disk, and scrubbing a disk image is a promise tarball surgery
cannot keep.
- box import <file> [--name <box>]: reads the artifact's name from
backup/index.yaml up front, refuses any name an existing instance holds
(the resolve_box boundary from the other side), pre-flights the stack
(require_stack, factored out of cmd_new), imports, then re-stamps the
HOST's truth onto the artifact's: user.box=1 (legacy tag honored), the
box-net placement (profile assign, the migrate-host move), fresh volatile
MACs (imports restore volatile.* verbatim — a re-import beside its
sibling collided at start with 'MAC address already defined on another
NIC', measured live on Incus 6.0.4), and reset_identity, exactly like a
clone.
- restricted tier: box grant now converges restricted.backups allow —
export rides the backup API, which incus-user's restricted projects block
by default exactly like snapshots (incus 6.0 permissions.go,
AllowBackupCreation). Import is plain instance creation and needs no key.
- tests: driven usage errors + fail-closed grep/line-order guards for every
daemon-gated invariant; CI's rehearsal job now runs a live round-trip
(mint, write, snapshot, down, export, rm, import, assert the file, the
snapshot, the tag, the agent, and the collision refusal).
The whole flow was verified against a live Incus 6.0.4 daemon: running-box
refusal, export, overwrite guard, rm, import with and without --name,
re-home onto box-net, sibling re-import with distinct MACs and machine-ids,
pre-export file and snapshot present in both.
Closes#70
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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