Initial snapshot support. Building now requires KVM too

templates/snapshot.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+function save {
+  local token=$(cat /root/.emulator_console_auth_token)
+  expect -f /snapshot.expect $token
+}
+
+function clean_up {
+    echo "Cleaning up"
+    rm /tmp/.X1-lock
+
+    kill $XVFB_PID
+    exit
+}
+
+echo "Starting emulator"
+trap clean_up SIGHUP SIGINT SIGTERM
+export DISPLAY=:1
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/android-sdk-linux/emulator/lib64/qt/lib:/opt/android-sdk-linux/emulator/lib64/libstdc++:/opt/android-sdk-linux/emulator/lib64:/opt/android-sdk-linux/emulator/lib64/gles_swiftshader
+Xvfb :1 +extension GLX +extension RANDR +extension RENDER +extension XFIXES -screen 0 1024x768x24 &
+XVFB_PID=$!
+
+cd /opt/android-sdk-linux/emulator
+LIBGL_DEBUG=verbose ./qemu/linux-x86_64/qemu-system-i386 -avd x86 -snapshot default -no-snapshot-save &
+EMULATOR_PID=$!
+
+adb wait-for-device
+
+boot_completed=`adb -e shell getprop sys.boot_completed 2>&1`
+timeout=0
+until [ "X${boot_completed:0:1}" = "X1" ]; do
+    sleep 1
+    boot_completed=`adb shell getprop sys.boot_completed 2>&1 | head -n 1`
+    echo "Read boot_completed property: <$boot_completed>"
+    let "timeout += 1"
+    if [ $timeout -gt 300 ]; then
+         echo "Failed to start emulator"
+         exit 1
+    fi
+done
+
+sleep 5
+
+save
+adb emu kill
+
+# Doesn't work: triggers cold boot
+# qemu-img convert -O qcow2 -c /root/.android/avd/x86.avd/userdata-qemu.img /root/.android/avd/x86.avd/userdata-qemu.img_qcow2
+# mv /root/.android/avd/x86.avd/userdata-qemu.img_qcow2 /root/.android/avd/x86.avd/userdata-qemu.img
+
+# Moving adb binary away so that stopping adb server with delay will release the emulator and will make it available for external connections
+mv /opt/android-sdk-linux/platform-tools/adb /opt/android-sdk-linux/platform-tools/_adb
+
+echo "Great Scott!"
+clean_up