Building and Running

• m update_engine_nonetd to build
• run scripts/reload_update_engine.sh to stop currently running update_engine and run locally built update_engine
• If scripts/reload_update_engine.sh fails with .so errors, run adb push $OUT/system/lib64/*.so /data to push local .so to device.
• python3 scripts/update_device.py <path to ota.zip> --no-postinstall to install OTA, look for onPayloadApplicationComplete(ErrorCode::kSuccess (0)) as an indicator for successful OTA install. If --no-slot-switch is passed to update_device.py, look for onPayloadApplicationComplete(ErrorCode::kUpdatedButNotActive (52)) instead.
• On failed OTA install, use logcat adb logcat -d -s update_engine to inspect update_engine logs. logcat output tend to be long, so either pipe to a file or use tail command to check the last few lines.
• Cleanup any install OTA with adb shell update_engine_client --reset_status