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* fix(build): clear stale archzfs from the pacoloco cache tooCraig Jennings2026-05-221-0/+34
| | | | | | archzfs re-uploads its GitHub release assets under the same filename, so pacoloco keeps serving a zfs-dkms/zfs-utils it cached earlier while pacman fetches a fresh archzfs.db with a new checksum. The two mismatch and pacstrap aborts with "invalid or corrupted package." build.sh already drops the stale packages from the host pacman cache, but it never cleared the pacoloco layer, which the VM test installs route through too, so test-install.sh kept hitting the corruption (four times in one session). build.sh runs as root, so it now clears /var/cache/pacoloco/pkgs/archzfs/zfs-* alongside the host cache, which makes the build-then-test flow self-healing. The pacoloco cache is root-owned and test-install.sh runs as the user, so it can't clear it unattended. Instead, test-install.sh now recognizes the corruption (is_archzfs_cache_corruption) and prints how to clear it, the way it already names the SSH_PORT override on a port collision. A retry alone won't help since it hits the same cached file, so this fails fast with the hint rather than retrying.
* fix(test): fail clearly when the VM forward port is takenCraig Jennings2026-05-221-0/+31
| | | | | | A test run launched qemu without first checking the SSH forward port, so a collision with another VM already holding it surfaced only as an opaque "Failed to start VM," with qemu unable to bind and no hint why. I added a port_in_use check in run_test before the launch: it errors with the port number and the SSH_PORT override to set, records the failure, and moves on. The check lives in run_test, not start_vm, because start_vm runs in a command substitution (vm_pid=$(start_vm ...)) where this harness's non-exiting error() would be captured as the PID instead of failing the run. The pure half, port_listening_in, takes an `ss -tln` snapshot as a string so it's unit-testable.
* test: make SSH_PORT overridable in test-install.shCraig Jennings2026-05-221-0/+21
| | | | The port was hardcoded, so a test run collided with any other VM already forwarding 2222. It now defaults to 2222, so existing invocations are unchanged. SSH_PORT=2223 scripts/test-install.sh picks a free port to run alongside another VM.
* feat(test): retry pacstrap through transient mirror flakesCraig Jennings2026-05-201-0/+216
test-install.sh aborts a whole 5-minute VM run when pacstrap hits a transient mirror blip, and the suite reports a failure indistinguishable from a real install regression. run_test now retries the install up to twice, but only when the in-VM log shows both pacstrap's "Failed to install packages to new root" marker and a download/network indicator. A deterministic failure like "target not found" carries the marker without a network indicator, so it still fails fast. archangel's failure trap exports the pool and unmounts on abort, so each retry re-partitions and re-pacstraps from a clean state. Wiring the predicate up needed a source-guard so bats can source the harness, which had none. With that in place I unit-covered the pure helpers — is_transient_install_failure, char_to_qemu_key, get_disk_count, get_disk_args — and lifted char_to_qemu_key out of monitor_sendkeys so the QEMU keymap is testable on its own. The keymap test found a dead branch. The backslash case pattern was '\\', which never matches a lone backslash because bash matches one against '\', so a passphrase containing a backslash would have sent an invalid QEMU keyname instead of "backslash". No test passphrase uses one, so it never bit. I fixed the pattern.