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

trunk/src/tools/gn/command_gen.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 "base/bind.h"
-#include "base/command_line.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/time/time.h"
-#include "tools/gn/build_settings.h"
-#include "tools/gn/commands.h"
-#include "tools/gn/ninja_target_writer.h"
-#include "tools/gn/ninja_writer.h"
-#include "tools/gn/scheduler.h"
-#include "tools/gn/setup.h"
-#include "tools/gn/standard_out.h"
-
-namespace {
-
-// Suppress output on success.
-const char kSwitchQuiet[] = "q";
-
-}  // namespace
-
-int RunGenCommand(const std::vector<std::string>& args) {
-  base::TimeTicks begin_time = base::TimeTicks::Now();
-
-  // Deliberately leaked to avoid expensive process teardown.
-  Setup* setup = new Setup;
-  if (!setup->DoSetup())
-    return 1;
-
-  // Cause the load to also generate the ninja files for each target.
-  setup->build_settings().set_target_resolved_callback(
-      base::Bind(&NinjaTargetWriter::RunAndWriteFile));
-
-  // Do the actual load. This will also write out the target ninja files.
-  if (!setup->Run())
-    return 1;
-
-  // Write the root ninja files.
-  if (!NinjaWriter::RunAndWriteFiles(&setup->build_settings())) {
-    Err(Location(),
-        "Couldn't open root buildfile(s) for writing").PrintToStdout();
-    return 1;
-  }
-
-  base::TimeTicks end_time = base::TimeTicks::Now();
-
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(kSwitchQuiet)) {
-    OutputString("Done. ", DECORATION_GREEN);
-
-    // TODO(brettw) get the number of targets without getting the entire list.
-    std::vector<const Target*> all_targets;
-    setup->build_settings().target_manager().GetAllTargets(&all_targets);
-    std::string stats = "Generated " +
-        base::IntToString(static_cast<int>(all_targets.size())) +
-        " targets from " +
-        base::IntToString(
-            setup->scheduler().input_file_manager()->GetInputFileCount()) +
-        " files in " +
-        base::IntToString((end_time - begin_time).InMilliseconds()) + "ms\n";
-    OutputString(stats);
-  }
-
-  return 0;
-}