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"]