#!/usr/bin/env python
#
# Copyright (C) 2008 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.

import os, sys, imp

LOCAL_DIR = os.path.abspath(os.path.join(os.path.dirname(os.path.abspath(__file__)), '..'))
RELEASETOOLS_DIR = os.path.abspath(os.path.join(LOCAL_DIR, '../../../build/tools/releasetools'))
TARGET_DIR = os.getenv('OUT')

# Add releasetools directory to python path
sys.path.append(RELEASETOOLS_DIR)

# Import the existing file so we just have to rewrite the modules we need.
# This is a nasty hack as the filename doesn't end in .py, but it works
filename = os.path.join(RELEASETOOLS_DIR, 'sign_target_files_apks')
f = open(filename, 'rU')
sign_target_files_apks = imp.load_module('sign_target_files_apks', f, filename, ('', 'U', 1))
f.close()

from sign_target_files_apks import *

__doc__ = sign_target_files_apks.__doc__

from common import File

def RebuildRecovery(image_name, unpack_dir, fs_config_file):
    """Takes the modified recovery ramdisk and rebuilds the recovery
    image"""

    recovery_ramdisk_dir = os.path.join(unpack_dir, "RECOVERY", "RAMDISK")
    ramdisk_cpio = os.path.join(TARGET_DIR, "ramdisk-recovery.cpio")
    ramdisk_cpio_tmp = os.path.join(TARGET_DIR, "ramdisk-recovery.cpio.orig")
    recovery_kernel_dir = os.path.join(TARGET_DIR, "obj", "KERNEL_RECOVERY_OBJ")
    recovery_kernel_out = os.path.join(recovery_kernel_dir, "arch", "arm", "boot",
                                       "zImage")

    print("Rebuilding the recovery image...")

    # temporary move the original ramdisk, move it back later
    if os.path.exists(ramdisk_cpio):
        os.rename(ramdisk_cpio, ramdisk_cpio_tmp)
    else:
        print("no ramdisk in $OUT dir")
        raise OSError(2, 'No such file or directory', ramdisk_cpio)

    ramdisk = open(ramdisk_cpio, "w")
    cmd = ["mkbootfs", "-f", fs_config_file, recovery_ramdisk_dir]
    p = subprocess.call(cmd, stdout=ramdisk)
    if p:
        raise ValueError("mkbootfs of %s failed" % recovery_ramdisk_dir)

    cross_compile = os.getenv('ARM_EABI_TOOLCHAIN')
    subprocess.call(["make", "-C", "kernel/samsung/smdk4412",
                     "O=" + recovery_kernel_dir, "ARCH=arm",
                     "CROSS_COMPILE=" + cross_compile, "zImage"])
    if p:
        raise ValueError("rebuilding recovery failed: " + str(p))

    os.rename(ramdisk_cpio_tmp, ramdisk_cpio)

    return File.FromLocalFile(image_name, recovery_kernel_out)


def GetBootableImage(name, prebuilt_name, unpack_dir, tree_subdir,
                     info_dict=None):

    if prebuilt_name == "recovery.img":
        fs_config = "META/" + tree_subdir.lower() + "_filesystem_config.txt"
        return RebuildRecovery(name, unpack_dir, os.path.join(unpack_dir,
                                                              fs_config))
    else:
        return File.FromLocalFile(name, os.path.join(TARGET_DIR, prebuilt_name))

common.GetBootableImage = GetBootableImage

if __name__ == '__main__':
  try:
    main(sys.argv[1:])
  except common.ExternalError as e:
    print()
    print("   ERROR: %s" % e)
    print()
    sys.exit(1)