[Android] Apk size tool.

build/android/apksize.py

Index: build/android/apksize.py
diff --git a/build/android/apksize.py b/build/android/apksize.py
new file mode 100755
index 0000000000000000000000000000000000000000..ae5462bd222a5c5bd4c72139814f3a36c73c6486
--- /dev/null
+++ b/build/android/apksize.py
@@ -0,0 +1,228 @@
+#!/usr/bin/env python
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import collections
+import json
+import logging
+import os
+import sys
+import zipfile
+
+_BASE_CHART = {
+    'format_version': '0.1',
+    'benchmark_name': 'apk_size',
+    'benchmark_description': 'APK size information.',
+    'trace_rerun_options': [],
+    'charts': {}
+}
+
+
+# TODO(rnephew): Add support for split apks.
+class ApkSizeInfo(object):
+
+  def __init__(self, path):
+    """ApkSizeInfo constructor.
+
+    Args:
+      path: Path to apk.
+    """
+    if not os.path.isfile(path):
+      raise IOError('Not a valid file path for apk.')
+    if not os.access(path, os.R_OK):
+      raise IOError('File is not readable.')
+    if not zipfile.is_zipfile(path):
+      raise TypeError('Not a valid apk')
+    logging.info('APK: %s', path)
+    self._apk_size = os.path.getsize(path)
+    self._zipfile = zipfile.ZipFile(path, 'r')
+    self._processed_files = None
+    self._compressed_size = 0
+    self._total_files = 0
+    self._uncompressed_size = 0
+    self._ProcessFiles()
+
+  def _ProcessFiles(self):
+    """Uses zipinfo to process apk file information."""
+    INITIAL_FILE_EXTENSION_INFO = {
+        'number': 0,
+        'compressed_bytes': 0,
+        'uncompressed_bytes': 0
+    }
+    self._processed_files = collections.defaultdict(
+        lambda: dict(INITIAL_FILE_EXTENSION_INFO))
+
+    for f in self._zipfile.infolist():
+      _, file_ext = os.path.splitext(f.filename)
+      file_ext = file_ext[1:] # Drop . from extension.
+
+      self._compressed_size += f.compress_size
+      self._total_files += 1
+      self._uncompressed_size += f.file_size
+      self._processed_files[file_ext]['number'] += 1
+      self._processed_files[file_ext]['compressed_bytes'] += f.compress_size
+      self._processed_files[file_ext]['uncompressed_bytes'] += f.file_size
+    return self._processed_files
+
+  def Compare(self, other_apk):
+    """Compares size information of two apks.
+
+    Args:
+      other_apk: ApkSizeInfo instance to compare size against.
+
+    Returns:
+      Dictionary of comparision results.
+    """
+    if not isinstance(other_apk, type(self)):
+      raise TypeError('Must pass it an ApkSizeInfo object')
+
+    other_lib_compressed = other_apk.processed_files['so']['compressed_bytes']
+    other_lib_uncompressed = (
+        other_apk.processed_files['so']['uncompressed_bytes'])
+    this_lib_compressed = self._processed_files['so']['compressed_bytes']
+    this_lib_uncompressed = self._processed_files['so']['uncompressed_bytes']
+
+    # TODO(rnephew) This will be made obsolete with modern and legacy apks being
+    # separate, a new method to compare will be required eventually.
+    return collections.OrderedDict([
+        ('APK_size_reduction',
+            other_apk.compressed_size - self.compressed_size),
+        ('ARM32_Legacy_install_or_upgrade_reduction',
+            (other_lib_compressed - this_lib_compressed) +
+            (other_lib_uncompressed - this_lib_uncompressed)),
+        ('ARM32_Legacy_system_image_reduction',
+            other_lib_compressed - this_lib_compressed),
+        ('ARM32_Modern_ARM64_install_or_upgrade_reduction',
+            other_lib_uncompressed - this_lib_uncompressed),
+        ('ARM32_Modern_ARM64_system_image_reduction',
+            other_lib_uncompressed - this_lib_uncompressed),
+    ])
+
+  @property
+  def apk_size(self):
+    return self._apk_size
+
+  @property
+  def compressed_size(self):
+    return self._compressed_size
+
+  @property
+  def total_files(self):
+    return self._total_files
+
+  @property
+  def uncompressed_size(self):
+    return self._uncompressed_size
+
+  @property
+  def processed_files(self):
+    return self._processed_files
+
+def add_value(chart_data, graph_title, trace_title, value, units,
+              improvement_direction='down', important=True):
+  chart_data['charts'].setdefault(graph_title, {})
+  chart_data['charts'][graph_title][trace_title] = {
+      'type': 'scalar',
+      'value': value,
+      'units': units,
+      'imporvement_direction': improvement_direction,
+      'important': important
+  }
+
+def chartjson_size_info(apk, output_dir):
+  """Sends size information to perf dashboard.
+
+  Args:
+    apk: ApkSizeInfo object
+  """
+  data = _BASE_CHART.copy()
+  files = apk.processed_files
+  add_value(data, 'files', 'total', apk.total_files, 'count')
+  add_value(data, 'size', 'total_size_compressed', apk.compressed_size, 'bytes')
+  add_value(data, 'size', 'total_size_uncompressed', apk.uncompressed_size,
+            'bytes')
+  add_value(data, 'size', 'apk_overhead', apk.apk_size - apk.compressed_size,
+           'bytes')
+  for ext in files:
+    add_value(data, 'files', ext, files[ext]['number'], 'count')
+    add_value(data, 'size_compressed', ext, files[ext]['compressed_bytes'],
+              'bytes')
+    add_value(data, 'size_uncompressed', ext, files[ext]['uncompressed_bytes'],
+              'bytes')
+
+  logging.info('Outputing data to json file %s', output_dir)
+  with open(os.path.join(output_dir, 'results-chart.json'), 'w') as json_file:
+    json.dump(data, json_file)
+
+def print_human_readable_size_info(apk):
+  """Prints size information in human readable format.
+
+  Args:
+    apk: ApkSizeInfo object
+  """
+  files = apk.processed_files
+  logging.critical('Stats for files as they exist within the apk:')
+  for ext in files:
+    logging.critical('  %-8s %s bytes in %s files', ext,
+                     files[ext]['compressed_bytes'], files[ext]['number'])
+  logging.critical('--------------------------------------')
+  logging.critical(
+      'All Files: %s bytes in %s files', apk.compressed_size, apk.total_files)
+  logging.critical('APK Size: %s', apk.apk_size)
+  logging.critical('APK overhead: %s', apk.apk_size - apk.compressed_size)
+  logging.critical('--------------------------------------')
+  logging.critical('Stats for files when extracted from the apk:')
+  for ext in files:
+    logging.critical('  %-8s %s bytes in %s files', ext,
+                     files[ext]['uncompressed_bytes'], files[ext]['number'])
+  logging.critical('--------------------------------------')
+  logging.critical(
+      'All Files: %s bytes in %s files', apk.uncompressed_size, apk.total_files)
+
+def chartjson_compare(compare_dict, output_dir):
+  """Sends size comparison between two apks to perf dashboard.
+
+  Args:
+    compare_dict: Dictionary returned from APkSizeInfo.Compare()
+  """
+  data = _BASE_CHART.copy()
+  for key, value in compare_dict.iteritems():
+    add_value(data, 'compare', key, value, 'bytes')
+
+  logging.info('Outputing data to json file %s', output_dir)
+  with open(os.path.join(output_dir, 'results-chart.json'), 'w') as json_file:
+    json.dump(data, json_file)
+
+def print_human_readable_compare(compare_dict):
+  """Prints size comparison between two apks in human readable format.
+
+  Args:
+    compare_dict: Dictionary returned from ApkSizeInfo.Compare()
+  """
+  for key, value in compare_dict.iteritems():
+    logging.critical('  %-50s %s bytes', key, value)
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('file_path')
+  parser.add_argument('-c', '--compare', help='APK to compare against.')
+  parser.add_argument('-o', '--output-dir',
+                      help='Sets it to return data in bot readable format')
+  parser.add_argument('-d', '--device', help='Dummy option for perf runner.')
+  args = parser.parse_args()
+
+  apk = ApkSizeInfo(args.file_path)
+  if args.compare:
+    compare_dict = apk.Compare(ApkSizeInfo(args.compare))
+    print_human_readable_compare(compare_dict)
+    if args.output_dir:
+      chartjson_compare(compare_dict, args.output_dir)
+  else:
+    print_human_readable_size_info(apk)
+    if args.output_dir:
+       chartjson_size_info(apk, args.output_dir)
+
+if __name__ == '__main__':
+  sys.exit(main())