Fix and cleanup Mojo and Mandoline python scripts.

mojo/tools/mopy/gn.py

-# 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.
-
-"""
-GN-related configuration functions, e.g., to produce a Config object from a GN
-args.gn file).
-"""
-
-
-import ast
-import os.path
-import re
-
-from .config import Config
-
-
-def BuildDirectoryForConfig(config, src_root):
-  """
-  Returns the build directory for the given configuration.
-  """
-  subdir = ""
-  if config.target_os == Config.OS_ANDROID:
-    subdir += "android_"
-    if config.target_cpu != Config.ARCH_ARM:
-      subdir += config.target_cpu + "_"
-  elif config.target_os == Config.OS_CHROMEOS:
-    subdir += "chromeos_"
-  subdir += "Debug" if config.is_debug else "Release"
-  if config.sanitizer == Config.SANITIZER_ASAN:
-    subdir += "_asan"
-  if not(config.is_debug) and config.dcheck_always_on:
-    subdir += "_dcheck"
-  return os.path.join(src_root, "out", subdir)
-
-
-def GNArgsForConfig(config):
-  """
-  Return the arguments for gn for the given configuration. This function returns
-  a dictionary with boolean values as boolean.
-  """
-  gn_args = {}
-
-  gn_args["is_debug"] = bool(config.is_debug)
-  gn_args["is_asan"] = config.sanitizer == Config.SANITIZER_ASAN
-
-  if config.is_clang is not None:
-    gn_args["is_clang"] = bool(config.is_clang)
-  else:
-    gn_args["is_clang"] = config.target_os not in (Config.OS_ANDROID,
-                                                   Config.OS_WINDOWS)
-
-  if config.values.get("use_goma"):
-    gn_args["use_goma"] = True
-    gn_args["goma_dir"] = config.values["goma_dir"]
-  else:
-    gn_args["use_goma"] = False
-
-  gn_args["dcheck_always_on"] = config.dcheck_always_on
-
-  gn_args["mojo_use_nacl"] = config.values.get("use_nacl", False)
-
-  if config.target_os == Config.OS_ANDROID:
-    gn_args["os"] = "android"
-  elif config.target_os == Config.OS_CHROMEOS:
-    gn_args["os"] = "chromeos"
-    gn_args["use_glib"] = False
-    gn_args["use_system_harfbuzz"] = False
-  elif config.target_os == Config.OS_LINUX:
-    gn_args["use_aura"] = False
-    gn_args["use_glib"] = False
-    gn_args["use_system_harfbuzz"] = False
-
-  gn_args["target_cpu"] = config.target_cpu
-
-  extra_args = config.values.get("gn_args")
-  if extra_args:
-    for arg in extra_args.split():
-      (name, val) = arg.split('=')
-      gn_args[name] = val
-
-  return gn_args
-
-
-def CommandLineForGNArgs(gn_args):
-  """
-  Returns the list of gn arguments to use with the gn command line.
-  """
-  def _ToCommandLine(key, value):
-    if type(value) is bool:
-      return "%s=%s" % (key, "true" if value else "false")
-    return "%s=\"%s\"" % (key, value)
-  return [_ToCommandLine(x, y) for x, y in gn_args.iteritems()]
-
-
-def ConfigForGNArgs(args):
-  """
-  Return the Config object for the given gn arguments. This function takes a
-  dictionary with boolean values as boolean.
-  """
-  config_args = {}
-  config_args["is_debug"] = args.get("is_debug", False)
-  config_args["sanitizer"] = (
-      Config.SANITIZER_ASAN if args.get("is_asan") else None)
-  config_args["is_clang"] = args.get("is_clang", False)
-  config_args["use_goma"] = args.get("use_goma", False)
-  if config_args["use_goma"]:
-    config_args["goma_dir"] = args.get("goma_dir")
-  config_args["use_nacl"] = args.get("mojo_use_nacl", False)
-  config_args["target_os"] = args.get("target_os")
-  config_args["target_cpu"] = args.get("target_cpu")
-  config_args["dcheck_always_on"] = args.get("dcheck_always_on")
-  return Config(**config_args)
-
-
-def ParseGNConfig(build_dir):
-  """
-  Parse the gn config file present in |build_dir|. This function returns a
-  dictionary with boolean values as boolean.
-  """
-  TRANSLATIONS = {
-      "true": "True",
-      "false": "False",
-  }
-  gn_file = os.path.join(build_dir, "args.gn")
-  values = {}
-  with open(gn_file, "r") as f:
-    for line in f.readlines():
-      line = re.sub("\s*#.*", "", line)
-      result = re.match("^\s*(\w+)\s*=\s*(.*)\s*$", line)
-      if result:
-        key = result.group(1)
-        value = result.group(2)
-        values[key] = ast.literal_eval(TRANSLATIONS.get(value, value))
-
-  # TODO(msw): The build dir is derived from GN args 'is_debug' and 'target_os'.
-  #            The script should probably use its 'build_dir' argument instead.
-  if not "is_debug" in values:
-    values["is_debug"] = "Debug" in build_dir
-
-  return values