jar_info_utils.py (2101B)
1 # Copyright 2018 The Chromium Authors 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 import os 6 7 # Utilities to read and write .jar.info files. 8 # 9 # A .jar.info file contains a simple mapping from fully-qualified Java class 10 # names to the source file that actually defines it. 11 # 12 # For APKs, the .jar.info maps the class names to the .jar file that which 13 # contains its .class definition instead. 14 15 16 def ReadAarSourceInfo(info_path): 17 """Returns the source= path from an .aar's source.info file.""" 18 # The .info looks like: "source=path/to/.aar\n". 19 with open(info_path) as f: 20 return f.read().rstrip().split('=', 1)[1] 21 22 23 def ParseJarInfoFile(info_path): 24 """Parse a given .jar.info file as a dictionary. 25 26 Args: 27 info_path: input .jar.info file path. 28 Returns: 29 A new dictionary mapping fully-qualified Java class names to file paths. 30 """ 31 info_data = dict() 32 if os.path.exists(info_path): 33 with open(info_path, 'r') as info_file: 34 for line in info_file: 35 line = line.strip() 36 if line: 37 fully_qualified_name, path = line.split(',', 1) 38 info_data[fully_qualified_name] = path 39 return info_data 40 41 42 def WriteJarInfoFile(output_obj, info_data, source_file_map=None): 43 """Generate a .jar.info file from a given dictionary. 44 45 Args: 46 output_obj: output file object. 47 info_data: a mapping of fully qualified Java class names to filepaths. 48 source_file_map: an optional mapping from java source file paths to the 49 corresponding source .srcjar. This is because info_data may contain the 50 path of Java source files that where extracted from an .srcjar into a 51 temporary location. 52 """ 53 for fully_qualified_name, path in sorted(info_data.items()): 54 if source_file_map and path in source_file_map: 55 path = source_file_map[path] 56 assert not path.startswith('/tmp'), ( 57 'Java file path should not be in temp dir: {}'.format(path)) 58 output_obj.write(('{},{}\n'.format(fully_qualified_name, 59 path)).encode('utf8'))