Otapreopt: Add init script for A/B artifact move

LOCAL_MODULE_CLASS := EXECUTABLES

LOCAL_SRC_FILES := otapreopt_script.sh

# Let this depend on otapreopt and the chroot tool, so we just have to mention one in a

# configuration.

LOCAL_REQUIRED_MODULES := otapreopt otapreopt_chroot

# Let this depend on otapreopt, the chroot tool and the slot script, so we just have to mention one

# in a configuration.

LOCAL_REQUIRED_MODULES := otapreopt otapreopt_chroot otapreopt_slot

include $(BUILD_PREBUILT)

# When /data is available, look for A/B artifacts for the current slot and move them

# into the dalvik-cache (relabeling them).

on post-fs-data

    exec - root -- /system/bin/otapreopt_slot

    # The dalvik-cache was not moved itself, so as to restrict the rights of otapreopt_slot.

    # But now the relabeling is annoying as there is no force option available here. So

    # explicitly list all the ISAs we know.

    restorecon_recursive /data/dalvik-cache/arm /data/dalvik-cache/arm64 /data/dalvik-cache/mips /data/dalvik-cache/mips64 /data/dalvik-cache/x86 /data/dalvik-cache/x86_64

#!/system/bin/sh

#

# Copyright (C) 2016 The Android Open Source Project

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#      http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

# This script will move artifacts for the currently active slot.

SLOT_SUFFIX=$(getprop ro.boot.slot_suffix)

if test -n "$SLOT_SUFFIX" ; then

  if test -d /data/ota/$SLOT_SUFFIX/dalvik-cache ; then

    log -p i -t otapreopt_slot "Moving A/B artifacts for slot ${SLOT_SUFFIX}."

    rm -rf /data/dalvik-cache/*

    mv /data/ota/$SLOT_SUFFIX/dalvik-cache/* /data/dalvik-cache/

    rmdir /data/ota/$SLOT_SUFFIX/dalvik-cache

    rmdir /data/ota/$SLOT_SUFFIX

  else

    log -p i -t otapreopt_slot "No A/B artifacts found for slot ${SLOT_SUFFIX}."

  fi

  exit 0

else

  log -p w -t otapreopt_slot "Slot property empty."

  exit 1

fi