Improve scripts

scripts/host_patch.sh

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+#####################################################################
+#   AVD MagiskInit Setup
+#####################################################################
+#
+# Support API level: 23 - 35
+#
+# With an emulator booted and accessible via ADB, usage:
+# ./build.py avd_patch path/to/booted/avd-image/ramdisk.img
+#
+# The purpose of this script is to patch AVD ramdisk.img and do a
+# full integration test of magiskinit under several circumstances.
+# After patching ramdisk.img, close the emulator, then select
+# "Cold Boot Now" in AVD Manager to force a full reboot.
+#
+#####################################################################
+# AVD Init Configurations:
+#
+# rootfs w/o early mount: API 23 - 25
+# rootfs with early mount: API 26 - 27
+# Legacy system-as-root: API 28
+# 2 stage init: API 29 - 35
+#####################################################################
+
+if [ ! -f /system/build.prop ]; then
+  # Running on PC
+  echo 'Please run `./build.py avd_patch` instead of directly executing the script!'
+  exit 1
+fi
+
+cd /data/local/tmp
+chmod 755 busybox
+
+if [ -z "$FIRST_STAGE" ]; then
+  export FIRST_STAGE=1
+  export ASH_STANDALONE=1
+  # Re-exec script with busybox
+  exec ./busybox sh $0 "$@"
+fi
+
+TARGET_FILE="$1"
+OUTPUT_FILE="$1.magisk"
+
+if echo "$TARGET_FILE" | grep -q 'ramdisk'; then
+  IS_RAMDISK=true
+else
+  IS_RAMDISK=false
+fi
+
+# Extract files from APK
+unzip -oj magisk.apk 'assets/util_functions.sh' 'assets/stub.apk'
+. ./util_functions.sh
+
+api_level_arch_detect
+
+unzip -oj magisk.apk "lib/$ABI/*" -x "lib/$ABI/libbusybox.so"
+for file in lib*.so; do
+  chmod 755 $file
+  mv "$file" "${file:3:${#file}-6}"
+done
+
+if $IS_RAMDISK; then
+  ./magiskboot decompress "$TARGET_FILE" ramdisk.cpio
+else
+  ./magiskboot unpack "$TARGET_FILE"
+fi
+cp ramdisk.cpio ramdisk.cpio.orig
+
+export KEEPVERITY=true
+export KEEPFORCEENCRYPT=true
+
+echo "KEEPVERITY=$KEEPVERITY" > config
+echo "KEEPFORCEENCRYPT=$KEEPFORCEENCRYPT" >> config
+echo "PREINITDEVICE=$(./magisk --preinit-device)" >> config
+# For API 28, we also manually disable SystemAsRoot
+# Explicitly override skip_initramfs by setting RECOVERYMODE=true
+[ $API = "28" ] && echo 'RECOVERYMODE=true' >> config
+cat config
+
+./magiskboot compress=xz magisk magisk.xz
+./magiskboot compress=xz stub.apk stub.xz
+./magiskboot compress=xz init-ld init-ld.xz
+
+./magiskboot cpio ramdisk.cpio \
+"add 0750 init magiskinit" \
+"mkdir 0750 overlay.d" \
+"mkdir 0750 overlay.d/sbin" \
+"add 0644 overlay.d/sbin/magisk.xz magisk.xz" \
+"add 0644 overlay.d/sbin/stub.xz stub.xz" \
+"add 0644 overlay.d/sbin/init-ld.xz init-ld.xz" \
+"patch" \
+"backup ramdisk.cpio.orig" \
+"mkdir 000 .backup" \
+"add 000 .backup/.magisk config"
+
+rm -f ramdisk.cpio.orig config *.xz
+if $IS_RAMDISK; then
+  ./magiskboot compress=gzip ramdisk.cpio "$OUTPUT_FILE"
+else
+  ./magiskboot repack "$TARGET_FILE" "$OUTPUT_FILE"
+  ./magiskboot cleanup
+fi