#!/bin/sh

# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2020-present Matthias Reichl <hias@horus.com>
# Copyright (C) 2020-present Team LibreELEC (https://libreelec.tv)

EARLY_DIR="$2"

log() {
  echo "libreelec-target-generator: $@" > /dev/kmsg
}

if [ -z "$EARLY_DIR" ]; then
  log "error: generator directory missing"
  exit 1
fi

TARGET=""

for arg in $(cat /proc/cmdline); do
  case "$arg" in
    textmode)
      TARGET="textmode.target"
      ;;
    installer)
      TARGET="installer.target"
      ;;
  esac
done

BACKUP_EXTENSION_LIST=".tar .tar.gz .tar.bz2 .tar.xz"
for extension in $BACKUP_EXTENSION_LIST; do
  BACKUP_FILE=$(ls -1 /storage/.restore/*${EXTENSION} 2>/dev/null | head -n 1)
  [ -n "${BACKUP_FILE}" ] && break
done

if [ -f /storage/.please_resize_me ]; then
  TARGET="fs-resize.target"
elif [ -f /storage/.cache/reset_hard -o -f /storage/.cache/reset_soft ]; then
  TARGET="factory-reset.target"
elif [ -f "$BACKUP_FILE" ]; then
  TARGET="backup-restore.target"
elif [ -f /storage/.rpi_flash_firmware ]; then
  TARGET="rpi-flash-firmware.target"
fi

if [ -n "$TARGET" ]; then
  ln -sT "/usr/lib/systemd/system/$TARGET" "$EARLY_DIR/default.target" 2>/dev/kmsg || log "error creating symlink to $TARGET: $?"
fi