1#!/usr/bin/env python 2# 3# Copyright (C) 2018 The Android Open Source Project 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17import apex_manifest_pb2 18from google.protobuf import message 19from google.protobuf.json_format import MessageToJson 20import zipfile 21 22class ApexManifestError(Exception): 23 24 def __init__(self, errmessage): 25 # Apex Manifest parse error (extra fields) or if required fields not present 26 self.errmessage = errmessage 27 28 29def ValidateApexManifest(file): 30 try: 31 with open(file, "rb") as f: 32 manifest_pb = apex_manifest_pb2.ApexManifest() 33 manifest_pb.ParseFromString(f.read()) 34 except message.DecodeError as err: 35 raise ApexManifestError(err) 36 # Checking required fields 37 if manifest_pb.name == "": 38 raise ApexManifestError("'name' field is required.") 39 if manifest_pb.version == 0: 40 raise ApexManifestError("'version' field is required.") 41 if manifest_pb.noCode and (manifest_pb.preInstallHook or 42 manifest_pb.postInstallHook): 43 raise ApexManifestError( 44 "'noCode' can't be true when either preInstallHook or postInstallHook is set" 45 ) 46 return manifest_pb 47 48def fromApex(apexFilePath): 49 with zipfile.ZipFile(apexFilePath, 'r') as apexFile: 50 with apexFile.open('apex_manifest.pb') as manifestFile: 51 manifest = apex_manifest_pb2.ApexManifest() 52 manifest.ParseFromString(manifestFile.read()) 53 return manifest 54 55def toJsonString(manifest): 56 return MessageToJson(manifest, indent=2)