mojo/tools/mopy/config.py

   1 # Copyright 2014 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5
   6 import ast
   7 import os.path
   8 import platform
   9 import re
  10 import sys
  11
  12
  13 class Config(object):
  14   '''A Config contains a dictionary that species a build configuration.'''
  15
  16   # Valid values for target_os:
  17   OS_ANDROID = 'android'
  18   OS_CHROMEOS = 'chromeos'
  19   OS_LINUX = 'linux'
  20   OS_MAC = 'mac'
  21   OS_WINDOWS = 'windows'
  22
  23   # Valid values for target_cpu:
  24   ARCH_X86 = 'x86'
  25   ARCH_X64 = 'x64'
  26   ARCH_ARM = 'arm'
  27
  28   def __init__(self, build_dir=None, target_os=None, target_cpu=None,
  29                is_debug=None, apk_name='MojoRunner.apk'):
  30     '''Function arguments take precedence over GN args and default values.'''
  31     assert target_os in (None, Config.OS_ANDROID, Config.OS_CHROMEOS,
  32                          Config.OS_LINUX, Config.OS_MAC, Config.OS_WINDOWS)
  33     assert target_cpu in (None, Config.ARCH_X86, Config.ARCH_X64,
  34                           Config.ARCH_ARM)
  35     assert is_debug in (None, True, False)
  36
  37     self.values = {
  38       'build_dir': build_dir,
  39       'target_os': self.GetHostOS(),
  40       'target_cpu': self.GetHostCPU(),
  41       'is_debug': True,
  42       'dcheck_always_on': False,
  43       'is_asan': False,
  44       'apk_name': apk_name,
  45     }
  46
  47     self._ParseGNArgs()
  48     if target_os is not None:
  49       self.values['target_os'] = target_os
  50     if target_cpu is not None:
  51       self.values['target_cpu'] = target_cpu
  52     if is_debug is not None:
  53       self.values['is_debug'] = is_debug
  54
  55   @staticmethod
  56   def GetHostOS():
  57     if sys.platform == 'linux2':
  58       return Config.OS_LINUX
  59     if sys.platform == 'darwin':
  60       return Config.OS_MAC
  61     if sys.platform == 'win32':
  62       return Config.OS_WINDOWS
  63     raise NotImplementedError('Unsupported host OS')
  64
  65   @staticmethod
  66   def GetHostCPU():
  67     # Derived from //native_client/pynacl/platform.py
  68     machine = platform.machine()
  69     if machine in ('x86', 'x86-32', 'x86_32', 'x8632', 'i386', 'i686', 'ia32',
  70                    '32'):
  71       return Config.ARCH_X86
  72     if machine in ('x86-64', 'amd64', 'AMD64', 'x86_64', 'x8664', '64'):
  73       return Config.ARCH_X64
  74     if machine.startswith('arm'):
  75       return Config.ARCH_ARM
  76     raise Exception('Cannot identify CPU arch: %s' % machine)
  77
  78   def _ParseGNArgs(self):
  79     '''Parse the gn config file from the build directory, if it exists.'''
  80     TRANSLATIONS = { 'true': 'True', 'false': 'False', }
  81     if self.values['build_dir'] is None:
  82       return
  83     gn_file = os.path.join(self.values['build_dir'], 'args.gn')
  84     if not os.path.isfile(gn_file):
  85       return
  86
  87     with open(gn_file, 'r') as f:
  88       for line in f:
  89         line = re.sub('\s*#.*', '', line)
  90         result = re.match('^\s*(\w+)\s*=\s*(.*)\s*$', line)
  91         if result:
  92           key = result.group(1)
  93           value = result.group(2)
  94           self.values[key] = ast.literal_eval(TRANSLATIONS.get(value, value))
  95
  96   # Getters for standard fields ------------------------------------------------
  97
  98   @property
  99   def build_dir(self):
 100     '''Build directory path.'''
 101     return self.values['build_dir']
 102
 103   @property
 104   def target_os(self):
 105     '''OS of the build/test target.'''
 106     return self.values['target_os']
 107
 108   @property
 109   def target_cpu(self):
 110     '''CPU arch of the build/test target.'''
 111     return self.values['target_cpu']
 112
 113   @property
 114   def is_debug(self):
 115     '''Is Debug build?'''
 116     return self.values['is_debug']
 117
 118   @property
 119   def dcheck_always_on(self):
 120     '''DCHECK and MOJO_DCHECK are fatal even in release builds'''
 121     return self.values['dcheck_always_on']
 122
 123   @property
 124   def is_asan(self):
 125     '''Is ASAN build?'''
 126     return self.values['is_asan']
 127
 128   @property
 129   def apk_name(self):
 130     '''Name of the APK file to run'''
 131     return self.values['apk_name']