The API 37 preview E2E boot has flaked twice (#285, #333) with only
"did not boot within 300s" and no root-cause signal. Add rich boot
diagnostics by default, kept in parity between CI and the local
hand-provisioning script (api37_e2e.py):
- Launch the emulator with `-verbose -debug init,avd_config,kernel`
(diagnostics only; no boot-affecting flag changed), still redirecting
to $EMU_LOG.
- Stream `adb logcat -v time` to a file from the moment the device
registers (via `adb wait-for-device logcat`, backgrounded).
- On a boot timeout, dump accel-check, /dev/kvm presence, GPU mode,
free mem/disk, the AVD config.ini and the emulator.log tail; CI writes
these to a boot-diagnostics file, the local script prints them.
- CI uploads emulator.log + logcat.txt + boot-diagnostics.txt as an
artifact with `if: always()` so they survive a timeout/cancel, and
prints a concise summary (accel/KVM status + last 50 lines of
emulator.log) to the step log.
The existing 2-attempt boot retry + boot-completed wait loop are
unchanged; the diagnostics are additive.
Closes#334
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
9e771a9590