328 lines
12 KiB
Python
328 lines
12 KiB
Python
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# Copyright 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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"""OtaTools class."""
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import logging
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import os
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import tempfile
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from acloud import errors
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from acloud.internal.lib import utils
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logger = logging.getLogger(__name__)
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_BIN_DIR_NAME = "bin"
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_LPMAKE = "lpmake"
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_BUILD_SUPER_IMAGE = "build_super_image"
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_AVBTOOL = "avbtool"
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_SGDISK = "sgdisk"
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_SIMG2IMG = "simg2img"
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_MK_COMBINED_IMG = "mk_combined_img"
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_UNPACK_BOOTIMG = "unpack_bootimg"
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_BUILD_SUPER_IMAGE_TIMEOUT_SECS = 30
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_AVBTOOL_TIMEOUT_SECS = 30
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_MK_COMBINED_IMG_TIMEOUT_SECS = 180
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_UNPACK_BOOTIMG_TIMEOUT_SECS = 30
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_MISSING_OTA_TOOLS_MSG = ("%(tool_name)s is not found. Run `make otatools` "
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"in build environment, or set --local-tool to an "
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"extracted otatools.zip.")
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def FindOtaToolsDir(search_paths):
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"""Find OTA tools directory in the search paths.
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Args:
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search_paths: List of paths, the directories to search for OTA tools.
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Returns:
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The directory containing OTA tools.
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Raises:
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errors.CheckPathError if OTA tools are not found.
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"""
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for search_path in search_paths:
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if os.path.isfile(os.path.join(search_path, _BIN_DIR_NAME,
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_BUILD_SUPER_IMAGE)):
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return search_path
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raise errors.CheckPathError(_MISSING_OTA_TOOLS_MSG %
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{"tool_name": "OTA tool directory"})
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def FindOtaTools(search_paths):
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"""Find OTA tools in the search paths.
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Args:
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search_paths: List of paths, the directories to search for OTA tools.
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Returns:
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An OtaTools object.
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Raises:
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errors.CheckPathError if OTA tools are not found.
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"""
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return OtaTools(FindOtaToolsDir(search_paths))
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def GetImageForPartition(partition_name, image_dir, **image_paths):
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"""Map a partition name to an image path.
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This function is used with BuildSuperImage or MkCombinedImg to mix
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image_dir and image_paths into the output file.
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Args:
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partition_name: String, e.g., "system", "product", and "vendor".
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image_dir: String, the directory to search for the images that are not
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given in image_paths.
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image_paths: Pairs of partition names and image paths.
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Returns:
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The image path if the partition is in image_paths.
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Otherwise, this function returns the path under image_dir.
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Raises
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errors.GetLocalImageError if the image does not exist.
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"""
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image_path = (image_paths.get(partition_name) or
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os.path.join(image_dir, partition_name + ".img"))
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if not os.path.isfile(image_path):
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raise errors.GetLocalImageError(
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"Cannot find image for partition %s" % partition_name)
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return image_path
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class OtaTools:
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"""The class that executes OTA tool commands."""
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def __init__(self, ota_tools_dir):
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self._ota_tools_dir = os.path.abspath(ota_tools_dir)
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def _GetBinary(self, name):
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"""Get an executable file from _ota_tools_dir.
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Args:
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name: String, the file name.
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Returns:
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String, the absolute path.
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Raises:
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errors.NoExecuteCmd if the file does not exist.
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"""
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path = os.path.join(self._ota_tools_dir, _BIN_DIR_NAME, name)
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if not os.path.isfile(path):
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raise errors.NoExecuteCmd(_MISSING_OTA_TOOLS_MSG %
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{"tool_name": name})
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utils.SetExecutable(path)
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return path
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@staticmethod
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def _RewriteMiscInfo(output_file, input_file, lpmake_path, get_image):
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"""Rewrite lpmake and image paths in misc_info.txt.
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Misc info consists of multiple lines of <key>=<value>.
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Sample input_file:
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lpmake=lpmake
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dynamic_partition_list= system system_ext product vendor
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Sample output_file:
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lpmake=/path/to/lpmake
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dynamic_partition_list= system system_ext product vendor
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system_image=/path/to/system.img
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system_ext_image=/path/to/system_ext.img
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product_image=/path/to/product.img
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vendor_image=/path/to/vendor.img
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This method replaces lpmake with the specified path, and sets
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*_image for every partition in dynamic_partition_list.
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Args:
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output_file: The output file object.
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input_file: The input file object.
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lpmake_path: The path to lpmake binary.
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get_image: A function that takes the partition name as the
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parameter and returns the image path.
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"""
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partition_names = ()
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for line in input_file:
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split_line = line.strip().split("=", 1)
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if len(split_line) < 2:
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split_line = (split_line[0], "")
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if split_line[0] == "dynamic_partition_list":
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partition_names = split_line[1].split()
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elif split_line[0] == "lpmake":
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output_file.write("lpmake=%s\n" % lpmake_path)
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continue
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elif split_line[0].endswith("_image"):
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continue
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output_file.write(line)
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if not partition_names:
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logger.w("No dynamic partition list in misc info.")
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for partition_name in partition_names:
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output_file.write("%s_image=%s\n" %
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(partition_name, get_image(partition_name)))
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@utils.TimeExecute(function_description="Build super image")
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@utils.TimeoutException(_BUILD_SUPER_IMAGE_TIMEOUT_SECS)
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def BuildSuperImage(self, output_path, misc_info_path, get_image):
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"""Use build_super_image to create a super image.
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Args:
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output_path: The path to the output super image.
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misc_info_path: The path to the misc info that provides parameters
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to create the super image.
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get_image: A function that takes the partition name as the
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parameter and returns the image path.
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"""
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build_super_image = self._GetBinary(_BUILD_SUPER_IMAGE)
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lpmake = self._GetBinary(_LPMAKE)
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new_misc_info_path = None
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try:
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with open(misc_info_path, "r") as misc_info:
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with tempfile.NamedTemporaryFile(
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prefix="misc_info_", suffix=".txt",
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delete=False, mode="w") as new_misc_info:
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new_misc_info_path = new_misc_info.name
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self._RewriteMiscInfo(new_misc_info, misc_info, lpmake,
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get_image)
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utils.Popen(build_super_image, new_misc_info_path, output_path)
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finally:
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if new_misc_info_path:
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os.remove(new_misc_info_path)
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@utils.TimeExecute(function_description="Make disabled vbmeta image.")
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@utils.TimeoutException(_AVBTOOL_TIMEOUT_SECS)
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def MakeDisabledVbmetaImage(self, output_path):
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"""Use avbtool to create a vbmeta image with verification disabled.
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Args:
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output_path: The path to the output vbmeta image.
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"""
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avbtool = self._GetBinary(_AVBTOOL)
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utils.Popen(avbtool, "make_vbmeta_image",
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"--flag", "2",
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"--padding_size", "4096",
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"--output", output_path)
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@staticmethod
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def _RewriteSystemQemuConfig(output_file, input_file, get_image):
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"""Rewrite image paths in system-qemu-config.txt.
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Sample input_file:
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out/target/product/generic_x86_64/vbmeta.img vbmeta 1
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out/target/product/generic_x86_64/super.img super 2
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Sample output_file:
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/path/to/vbmeta.img vbmeta 1
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/path/to/super.img super 2
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This method replaces the first entry of each line with the path
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returned by get_image.
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Args:
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output_file: The output file object.
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input_file: The input file object.
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get_image: A function that takes the partition name as the
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parameter and returns the image path.
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"""
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for line in input_file:
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split_line = line.split()
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if len(split_line) == 3:
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output_file.write("%s %s %s\n" % (get_image(split_line[1]),
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split_line[1],
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split_line[2]))
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else:
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output_file.write(line)
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@utils.TimeExecute(function_description="Make combined image")
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@utils.TimeoutException(_MK_COMBINED_IMG_TIMEOUT_SECS)
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def MkCombinedImg(self, output_path, system_qemu_config_path, get_image):
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"""Use mk_combined_img to create a disk image.
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Args:
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output_path: The path to the output disk image.
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system_qemu_config: The path to the config that provides the
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parition information on the disk.
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get_image: A function that takes the partition name as the
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parameter and returns the image path.
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"""
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mk_combined_img = self._GetBinary(_MK_COMBINED_IMG)
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sgdisk = self._GetBinary(_SGDISK)
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simg2img = self._GetBinary(_SIMG2IMG)
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new_config_path = None
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try:
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with open(system_qemu_config_path, "r") as config:
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with tempfile.NamedTemporaryFile(
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prefix="system-qemu-config_", suffix=".txt",
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delete=False, mode="w") as new_config:
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new_config_path = new_config.name
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self._RewriteSystemQemuConfig(new_config, config,
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get_image)
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mk_combined_img_env = {"SGDISK": sgdisk, "SIMG2IMG": simg2img}
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utils.Popen(mk_combined_img,
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"-i", new_config_path,
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"-o", output_path,
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env=mk_combined_img_env)
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finally:
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if new_config_path:
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os.remove(new_config_path)
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@utils.TimeExecute(function_description="Unpack boot image")
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@utils.TimeoutException(_UNPACK_BOOTIMG_TIMEOUT_SECS)
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def UnpackBootImg(self, out_dir, boot_img):
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"""Use unpack_bootimg to unpack a boot image to a direcotry.
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Args:
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out_dir: The output directory.
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boot_img: The path to the boot image.
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"""
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unpack_bootimg = self._GetBinary(_UNPACK_BOOTIMG)
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utils.Popen(unpack_bootimg,
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"--out", out_dir,
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"--boot_img", boot_img)
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def MixSuperImage(self, super_image, misc_info, image_dir,
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system_image=None, vendor_image=None,
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vendor_dlkm_image=None, odm_image=None,
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odm_dlkm_image=None):
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"""Create mixed super image from device images and given partition
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images.
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Args:
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super_image: Path to the output super image.
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misc_info: Path to the misc_info.txt.
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image_dir: Path to image files excluding system image.
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system_image: Path to the system image.
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vendor_image: Path to the vendor image.
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vendor_dlkm_image: Path to the vendor_dlkm image.
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odm_image: Path to the odm image.
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odm_dlkm_image: Path to the odm_dlkm image.
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"""
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self.BuildSuperImage(
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super_image, misc_info,
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lambda partition: GetImageForPartition(
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partition, image_dir,
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system=system_image,
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vendor=vendor_image,
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vendor_dlkm=vendor_dlkm_image,
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odm=odm_image,
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odm_dlkm=odm_dlkm_image))
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