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

trunk/src/tools/gn/ninja_writer.cc

-// 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.
-
-#include "tools/gn/ninja_writer.h"
-
-#include "tools/gn/location.h"
-#include "tools/gn/ninja_build_writer.h"
-#include "tools/gn/ninja_toolchain_writer.h"
-
-
-NinjaWriter::NinjaWriter(const BuildSettings* build_settings)
-    : build_settings_(build_settings) {
-}
-
-NinjaWriter::~NinjaWriter() {
-}
-
-// static
-bool NinjaWriter::RunAndWriteFiles(const BuildSettings* build_settings) {
-  NinjaWriter writer(build_settings);
-  return writer.WriteRootBuildfiles();
-}
-
-bool NinjaWriter::WriteRootBuildfiles() {
-  // Categorize all targets by toolchain.
-  typedef std::map<Label, std::vector<const Target*> > CategorizedMap;
-  CategorizedMap categorized;
-
-  std::vector<const Target*> all_targets;
-  build_settings_->target_manager().GetAllTargets(&all_targets);
-  for (size_t i = 0; i < all_targets.size(); i++) {
-    categorized[all_targets[i]->label().GetToolchainLabel()].push_back(
-        all_targets[i]);
-  }
-
-  Label default_label =
-      build_settings_->toolchain_manager().GetDefaultToolchainUnlocked();
-
-  // Write out the toolchain buildfiles, and also accumulate the set of
-  // all settings and find the list of targets in the default toolchain.
-  std::vector<const Settings*> all_settings;
-  const std::vector<const Target*>* default_targets = NULL;
-  for (CategorizedMap::const_iterator i = categorized.begin();
-       i != categorized.end(); ++i) {
-    const Settings* settings;
-    {
-      base::AutoLock lock(build_settings_->item_tree().lock());
-      Err ignored;
-      settings =
-          build_settings_->toolchain_manager().GetSettingsForToolchainLocked(
-              LocationRange(), i->first, &ignored);
-    }
-    if (i->first == default_label)
-      default_targets = &i->second;
-    all_settings.push_back(settings);
-    if (!NinjaToolchainWriter::RunAndWriteFile(settings, i->second))
-      return false;
-  }
-
-  // Write the root buildfile.
-  return NinjaBuildWriter::RunAndWriteFile(build_settings_, all_settings,
-                                           *default_targets);
-}