Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/settings.h

-// Copyright (c) 2013 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.
-
-#ifndef TOOLS_GN_SETTINGS_H_
-#define TOOLS_GN_SETTINGS_H_
-
-#include "base/files/file_path.h"
-#include "tools/gn/build_settings.h"
-#include "tools/gn/import_manager.h"
-#include "tools/gn/output_file.h"
-#include "tools/gn/scope.h"
-#include "tools/gn/source_dir.h"
-#include "tools/gn/toolchain.h"
-
-// Holds the settings for one toolchain invocation. There will be one
-// Settings object for each toolchain type, each referring to the same
-// BuildSettings object for shared stuff.
-//
-// The Settings object is const once it is constructed, which allows us to
-// use it from multiple threads during target generation without locking (which
-// is important, because it gets used a lot).
-//
-// The Toolchain object holds the set of stuff that is set by the toolchain
-// declaration, which obviously needs to be set later when we actually parse
-// the file with the toolchain declaration in it.
-class Settings {
- public:
-  enum TargetOS {
-    UNKNOWN,
-    LINUX,
-    MAC,
-    WIN
-  };
-
-  // Constructs a toolchain settings. The output_subdir_name is the name we
-  // should use for the subdirectory in the build output directory for this
-  // toolchain's outputs. It should have no slashes in it. The default
-  // toolchain should use an empty string.
-  Settings(const BuildSettings* build_settings,
-           const Toolchain* toolchain,
-           const std::string& output_subdir_name);
-  ~Settings();
-
-  const BuildSettings* build_settings() const { return build_settings_; }
-
-  // Danger: this must only be used for getting the toolchain label until the
-  // toolchain has been resolved. Otherwise, it will be modified on an
-  // arbitrary thread when the toolchain invocation is found. Generally, you
-  // will only read this from the target generation where we know everything
-  // has been resolved and won't change.
-  const Toolchain* toolchain() const { return toolchain_; }
-
-  bool IsMac() const { return target_os_ == MAC; }
-  bool IsWin() const { return target_os_ == WIN; }
-
-  TargetOS target_os() const { return target_os_; }
-  void set_target_os(TargetOS t) { target_os_ = t; }
-
-  const OutputFile& toolchain_output_subdir() const {
-    return toolchain_output_subdir_;
-  }
-  const SourceDir& toolchain_output_dir() const {
-    return toolchain_output_dir_;
-  }
-
-  // Directory for generated files.
-  const SourceDir& toolchain_gen_dir() const {
-    return toolchain_gen_dir_;
-  }
-
-  // The import manager caches the result of executing imported files in the
-  // context of a given settings object.
-  //
-  // See the ItemTree getter in GlobalSettings for why this doesn't return a
-  // const pointer.
-  ImportManager& import_manager() const { return import_manager_; }
-
-  const Scope* base_config() const { return &base_config_; }
-  Scope* base_config() { return &base_config_; }
-
- private:
-  const BuildSettings* build_settings_;
-
-  const Toolchain* toolchain_;
-
-  TargetOS target_os_;
-
-  mutable ImportManager import_manager_;
-
-  // The subdirectory inside the build output for this toolchain. For the
-  // default toolchain, this will be empty (since the deafult toolchain's
-  // output directory is the same as the build directory). When nonempty, this
-  // is guaranteed to end in a slash.
-  OutputFile toolchain_output_subdir_;
-
-  // Full source file path to the toolchain output directory.
-  SourceDir toolchain_output_dir_;
-
-  SourceDir toolchain_gen_dir_;
-
-  Scope base_config_;
-
-  DISALLOW_COPY_AND_ASSIGN(Settings);
-};
-
-#endif  // TOOLS_GN_SETTINGS_H_