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# Copyright (C) 2019 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
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
# Mount Android Runtime and Core Libraries APEX packages required in the chroot directory.
# This script emulates some the actions performed by `apexd`.
# Setup as root, as some actions performed here require it.
adb root
adb wait-for-device
# Exit early if there is no chroot.
[[ -n "$ART_TEST_CHROOT" ]] || exit
# Check that ART_TEST_CHROOT is correctly defined.
[[ "$ART_TEST_CHROOT" = /* ]] || { echo "$ART_TEST_CHROOT is not an absolute path"; exit 1; }
# Check that the "$ART_TEST_CHROOT/apex" directory exists.
adb shell test -d "$ART_TEST_CHROOT/apex" \
|| { echo "$ART_TEST_CHROOT/apex does not exist or is not a directory"; exit 1; }
# Create a directory where we extract APEX packages' payloads (ext4 images)
# under the chroot directory.
adb shell mkdir -p "$ART_TEST_CHROOT$apex_image_dir"
# activate_system_package APEX_PACKAGE APEX_NAME
# ----------------------------------------------
# Extract payload (ext4 image) from system APEX_PACKAGE and mount it as
# APEX_NAME in `/apex` under the chroot directory.
activate_system_package() {
local apex_package=$1
local apex_name=$2
local apex_package_path="/system/apex/$apex_package"
local abs_mount_point="$ART_TEST_CHROOT/apex/$apex_name"
local abs_image_filename="$ART_TEST_CHROOT$apex_image_dir/$apex_name.img"
# Make sure that the (absolute) path to the mounted ext4 image is less than
# 64 characters, which is a hard limit set in the kernel for loop device
# filenames (otherwise, we would get an error message from `losetup`, used
# by `mount` to manage the loop device).
[[ "${#abs_image_filename}" -ge 64 ]] \
&& { echo "Filename $abs_image_filename is too long to be used with a loop device"; exit 1; }
echo -e "${green}Activating package $apex_package as $apex_name${nc}"
# Extract payload (ext4 image). As standard Android builds do not contain
# `unzip`, we use the one we built and sync'd to the chroot directory instead.
local payload_filename="apex_payload.img"
adb shell chroot "$ART_TEST_CHROOT" \
/system/bin/unzip -q "$apex_package_path" "$payload_filename" -d "$apex_image_dir"
# Rename the extracted payload to have its name match the APEX's name.
adb shell mv "$ART_TEST_CHROOT$apex_image_dir/$payload_filename" "$abs_image_filename"
# Check that the mount point is available.
adb shell mount | grep -q " on $abs_mount_point" && \
{ echo "$abs_mount_point is already used as mount point"; exit 1; }
# Mount the ext4 image.
adb shell mkdir -p "$abs_mount_point"
adb shell mount -o loop,ro "$abs_image_filename" "$abs_mount_point"
# Activate the Android Runtime APEX.
# Note: We use the Debug Runtime APEX (which is a superset of the Release Runtime APEX).