//tools/binary_size: Consolidate most tools into "supersize" command

tools/binary_size/paths.py

-# Copyright 2017 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.
-
-"""Functions for dealing with determining --tool-prefix."""
-
-import distutils.spawn
-import logging
-import os
-
-_STATUS_DETECTED = 1
-_STATUS_VERIFIED = 2
-
-
-def AddOptions(parser):
-  parser.add_argument('--tool-prefix', default='',
-                      help='Path prefix for c++filt.')
-  parser.add_argument('--output-directory',
-                      help='Path to the root build directory.')
-
-
-class LazyPaths(object):
-  def __init__(self, args=None, tool_prefix=None, output_directory=None,
-               input_file=None):
-    tool_prefix = tool_prefix or (args and args.tool_prefix)
-    output_directory = output_directory or (args and args.output_directory)
-    self._tool_prefix = tool_prefix
-    self._output_directory = output_directory
-    self._input_file = input_file
-    self._output_directory_status = _STATUS_DETECTED if output_directory else 0
-    self._tool_prefix_status = _STATUS_DETECTED if tool_prefix else 0
-
-  @property
-  def tool_prefix(self):
-    if self._tool_prefix_status < _STATUS_DETECTED:
-      self._tool_prefix_status = _STATUS_DETECTED
-      self._tool_prefix = self._DetectToolPrefix() or ''
-      logging.debug('Detected --tool-prefix=%s', self._tool_prefix)
-    return self._tool_prefix
-
-  @property
-  def output_directory(self):
-    if self._output_directory_status < _STATUS_DETECTED:
-      self._output_directory_status = _STATUS_DETECTED
-      self._output_directory = self._DetectOutputDirectory()
-      logging.debug('Detected --output-directory=%s', self._output_directory)
-    return self._output_directory
-
-  def VerifyOutputDirectory(self):
-    output_directory = self.output_directory
-    if self._output_directory_status < _STATUS_VERIFIED:
-      self._output_directory_status = _STATUS_VERIFIED
-      if not output_directory or not os.path.isdir(output_directory):
-        raise Exception('Bad --output-directory. Path not found: %s' %
-                        output_directory)
-      logging.info('Using --output-directory=%s', output_directory)
-    return output_directory
-
-  def VerifyToolPrefix(self):
-    tool_prefix = self.tool_prefix
-    if self._tool_prefix_status < _STATUS_VERIFIED:
-      self._tool_prefix_status = _STATUS_VERIFIED
-      if os.path.sep not in tool_prefix:
-        full_path = distutils.spawn.find_executable(tool_prefix + 'c++filt')
-      else:
-        full_path = tool_prefix + 'c++filt'
-
-      if not full_path or not os.path.isfile(full_path):
-        raise Exception('Bad --tool-prefix. Path not found: %s' % full_path)
-      logging.info('Using --tool-prefix=%s', self._tool_prefix)
-    return tool_prefix
-
-  def _DetectOutputDirectory(self):
-    # See if input file is in out/Release.
-    abs_path = os.path.abspath(self._input_file)
-    release_idx = abs_path.find('Release')
-    if release_idx != -1:
-      output_directory = abs_path[:release_idx] + 'Release'
-      output_directory = os.path.relpath(abs_path[:release_idx] + '/Release')
-      return output_directory
-
-    # See if CWD=output directory.
-    if os.path.exists('build.ninja'):
-      return '.'
-    return None
-
-  def _DetectToolPrefix(self):
-    output_directory = self.output_directory
-    if output_directory:
-      # Auto-detect from build_vars.txt
-      build_vars_path = os.path.join(output_directory, 'build_vars.txt')
-      if os.path.exists(build_vars_path):
-        with open(build_vars_path) as f:
-          build_vars = dict(l.rstrip().split('=', 1) for l in f if '=' in l)
-        return os.path.normpath(
-            os.path.join(output_directory, build_vars['android_tool_prefix']))
-    return None