#!/bin/bash
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#
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# Copyright (C) 2019 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Mount Android Runtime and Core Libraries APEX packages required in the chroot directory.
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# This script emulates some the actions performed by `apexd`.
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green='\033[0;32m'
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nc='\033[0m'
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# Setup as root, as some actions performed here require it.
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adb root
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adb wait-for-device
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# Exit early if there is no chroot.
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[[ -n "$ART_TEST_CHROOT" ]] || exit
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# Check that ART_TEST_CHROOT is correctly defined.
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[[ "$ART_TEST_CHROOT" = /* ]] || { echo "$ART_TEST_CHROOT is not an absolute path"; exit 1; }
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# Check that the "$ART_TEST_CHROOT/apex" directory exists.
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adb shell test -d "$ART_TEST_CHROOT/apex" \
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|| { echo "$ART_TEST_CHROOT/apex does not exist or is not a directory"; exit 1; }
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# Create a directory where we extract APEX packages' payloads (ext4 images)
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# under the chroot directory.
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apex_image_dir="/tmp/apex"
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adb shell mkdir -p "$ART_TEST_CHROOT$apex_image_dir"
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# activate_system_package APEX_PACKAGE APEX_NAME
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# ----------------------------------------------
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# Extract payload (ext4 image) from system APEX_PACKAGE and mount it as
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# APEX_NAME in `/apex` under the chroot directory.
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activate_system_package() {
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local apex_package=$1
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local apex_name=$2
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local apex_package_path="/system/apex/$apex_package"
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local abs_mount_point="$ART_TEST_CHROOT/apex/$apex_name"
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local abs_image_filename="$ART_TEST_CHROOT$apex_image_dir/$apex_name.img"
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# Make sure that the (absolute) path to the mounted ext4 image is less than
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# 64 characters, which is a hard limit set in the kernel for loop device
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# filenames (otherwise, we would get an error message from `losetup`, used
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# by `mount` to manage the loop device).
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[[ "${#abs_image_filename}" -ge 64 ]] \
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&& { echo "Filename $abs_image_filename is too long to be used with a loop device"; exit 1; }
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echo -e "${green}Activating package $apex_package as $apex_name${nc}"
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# Extract payload (ext4 image). As standard Android builds do not contain
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# `unzip`, we use the one we built and sync'd to the chroot directory instead.
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local payload_filename="apex_payload.img"
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adb shell chroot "$ART_TEST_CHROOT" \
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/system/bin/unzip -q "$apex_package_path" "$payload_filename" -d "$apex_image_dir"
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# Rename the extracted payload to have its name match the APEX's name.
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adb shell mv "$ART_TEST_CHROOT$apex_image_dir/$payload_filename" "$abs_image_filename"
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# Check that the mount point is available.
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adb shell mount | grep -q " on $abs_mount_point" && \
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{ echo "$abs_mount_point is already used as mount point"; exit 1; }
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# Mount the ext4 image.
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adb shell mkdir -p "$abs_mount_point"
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adb shell mount -o loop,ro "$abs_image_filename" "$abs_mount_point"
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}
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# Activate the Android Runtime APEX.
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# Note: We use the Debug Runtime APEX (which is a superset of the Release Runtime APEX).
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activate_system_package com.android.runtime.debug.apex com.android.runtime
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