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#!/bin/bash
# Copyright (C) 2021 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
# This util launches the Android emulator and ensures it doesn't stuck/freeze
# by detecting that and restarting it
set -e
EMULATOR_MAX_RETRIES=5
EMULATOR_EXEC="$ANDROID_SDK_ROOT/emulator/emulator"
ADB_EXEC="$ANDROID_SDK_ROOT/platform-tools/adb"
if [ -z "${ANDROID_EMULATOR}" ]
then
EMULATOR_NAME="@emulator_x86_api_23"
else
EMULATOR_NAME="$ANDROID_EMULATOR"
fi
function check_for_android_device
{
$ADB_EXEC devices \
| awk 'NR==2{print $2}' | grep -qE '^(online|device)$'
}
# WARNING: On the very first boot of the emulator it happens that the device
# "finishes" booting and getprop shows bootanim=stopped and
# boot_completed=1. But sometimes not all packages have been installed (`pm
# list packages` shows only 16 packages installed), and after around half a
# minute the boot animation starts spinning (bootanim=running) again despite
# boot_completed=1 all the time. After some minutes the boot animation stops
# again and the list of packages contains 80 packages. Only then the device is
# fully booted, and only then is dev.bootcomplete=1.
#
# To reproduce the emulator booting as the first time, you have to delete the
# cached images found inside $HOME/.android especially the
# "userdata-qemu.img.qcow2" file.
function check_if_fully_booted
{
# The "getprop" command separates lines with \r\n so we trim them
bootanim=` $ADB_EXEC shell getprop init.svc.bootanim | tr -d '\r\n'`
boot_completed=`$ADB_EXEC shell getprop sys.boot_completed | tr -d '\r\n'`
bootcomplete=` $ADB_EXEC shell getprop dev.bootcomplete | tr -d '\r\n'`
echo "bootanim=$bootanim boot_completed=$boot_completed bootcomplete=$bootcomplete"
[ "$bootanim" = stopped ] && [ "$boot_completed" = 1 ] && [ "$bootcomplete" = 1 ]
}
for counter in `seq ${EMULATOR_MAX_RETRIES}`
do
$ADB_EXEC start-server
if check_for_android_device
then
echo "Emulator is already running but it shouldn't be. Aborting\!"
exit 3
fi
echo "Starting emulator, try ${counter}/${EMULATOR_MAX_RETRIES}"
$EMULATOR_EXEC $EMULATOR_NAME \
-gpu swiftshader_indirect -no-audio -partition-size 4096 \
-cores 4 -memory 16000 -no-snapshot-load -no-snapshot-save \
</dev/null >$HOME/emulator.log 2>&1 &
emulator_pid=$!
disown $emulator_pid
echo "Waiting for emulated device to appear..."
$ADB_EXEC wait-for-device
echo "Waiting a few minutes for the emulator to fully boot..."
emulator_status=down
for i in `seq 300`
do
sleep 1
if check_for_android_device && check_if_fully_booted
then
emulator_status=up
break
fi
done
# If emulator status is still offline after timeout period,
# we can assume it's stuck, and we must restart it
if [ $emulator_status = up ]
then
echo "Emulator started successfully"
break
else
if [ $counter -lt $EMULATOR_MAX_RETRIES ]
then
echo "Emulator failed to start, forcefully killing current instance and re-starting emulator"
kill $emulator_pid || true
sleep 5
elif [ $counter -eq $EMULATOR_MAX_RETRIES ]
then
echo "Emulator failed to start, reached maximum number of retries. Aborting\!"
exit 2
fi
fi
done
exit 0
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