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

trunk/src/tools/gn/ninja_build_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_build_writer.h"
-
-#include <fstream>
-
-#include "base/command_line.h"
-#include "base/file_util.h"
-#include "base/process/process_handle.h"
-#include "base/strings/utf_string_conversions.h"
-#include "build/build_config.h"
-#include "tools/gn/build_settings.h"
-#include "tools/gn/filesystem_utils.h"
-#include "tools/gn/input_file_manager.h"
-#include "tools/gn/scheduler.h"
-#include "tools/gn/target.h"
-
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
-namespace {
-
-std::string GetSelfInvocationCommand(const BuildSettings* build_settings) {
-#if defined(OS_WIN)
-  wchar_t module[MAX_PATH];
-  GetModuleFileName(NULL, module, MAX_PATH);
-  //result = "\"" + WideToUTF8(module) + "\"";
-  base::FilePath executable(module);
-#elif defined(OS_MACOSX)
-  // FIXME(brettw) write this on Mac!
-  base::FilePath executable("gn");
-#else
-  base::FilePath executable =
-      base::GetProcessExecutablePath(base::GetCurrentProcessHandle());
-#endif
-
-/*
-  // Append the root path.
-  CommandLine* cmdline = CommandLine::ForCurrentProcess();
-  result += " --root=\"" + FilePathToUTF8(settings->root_path()) + "\"";
-*/
-
-  CommandLine cmdline(executable);
-  cmdline.AppendSwitchPath("--root", build_settings->root_path());
-
-  // TODO(brettw) append other parameters.
-
-#if defined(OS_WIN)
-  return WideToUTF8(cmdline.GetCommandLineString());
-#else
-  return cmdline.GetCommandLineString();
-#endif
-}
-
-}  // namespace
-
-NinjaBuildWriter::NinjaBuildWriter(
-    const BuildSettings* build_settings,
-    const std::vector<const Settings*>& all_settings,
-    const std::vector<const Target*>& default_toolchain_targets,
-    std::ostream& out)
-    : build_settings_(build_settings),
-      all_settings_(all_settings),
-      default_toolchain_targets_(default_toolchain_targets),
-      out_(out),
-      path_output_(build_settings->build_dir(), ESCAPE_NINJA, true),
-      helper_(build_settings) {
-}
-
-NinjaBuildWriter::~NinjaBuildWriter() {
-}
-
-void NinjaBuildWriter::Run() {
-  WriteNinjaRules();
-  WriteSubninjas();
-  WritePhonyAndAllRules();
-}
-
-// static
-bool NinjaBuildWriter::RunAndWriteFile(
-    const BuildSettings* build_settings,
-    const std::vector<const Settings*>& all_settings,
-    const std::vector<const Target*>& default_toolchain_targets) {
-  base::FilePath ninja_file(build_settings->GetFullPath(
-      SourceFile(build_settings->build_dir().value() + "build.ninja")));
-  file_util::CreateDirectory(ninja_file.DirName());
-
-  std::ofstream file;
-  file.open(FilePathToUTF8(ninja_file).c_str(),
-            std::ios_base::out | std::ios_base::binary);
-  if (file.fail())
-    return false;
-
-  NinjaBuildWriter gen(build_settings, all_settings,
-                       default_toolchain_targets, file);
-  gen.Run();
-  return true;
-}
-
-void NinjaBuildWriter::WriteNinjaRules() {
-  out_ << "rule gn\n";
-  out_ << "  command = " << GetSelfInvocationCommand(build_settings_) << "\n";
-  out_ << "  description = GN the world\n\n";
-
-  out_ << "build build.ninja: gn";
-
-  // Input build files.
-  std::vector<SourceFile> input_files;
-  g_scheduler->input_file_manager()->GetAllInputFileNames(&input_files);
-  for (size_t i = 0; i < input_files.size(); i++) {
-    out_ << " ";
-    path_output_.WriteFile(out_, input_files[i]);
-  }
-
-  // Other files read by the build.
-  std::vector<SourceFile> other_files = g_scheduler->GetGenDependencies();
-  for (size_t i = 0; i < other_files.size(); i++) {
-    out_ << " ";
-    path_output_.WriteFile(out_, other_files[i]);
-  }
-
-  out_ << std::endl << std::endl;
-}
-
-void NinjaBuildWriter::WriteSubninjas() {
-  for (size_t i = 0; i < all_settings_.size(); i++) {
-    out_ << "subninja ";
-    path_output_.WriteFile(out_,
-                           helper_.GetNinjaFileForToolchain(all_settings_[i]));
-    out_ << std::endl;
-  }
-  out_ << std::endl;
-}
-
-void NinjaBuildWriter::WritePhonyAndAllRules() {
-  std::string all_rules;
-
-  // Write phony rules for the default toolchain (don't do other toolchains or
-  // we'll get naming conflicts).
-  for (size_t i = 0; i < default_toolchain_targets_.size(); i++) {
-    const Target* target = default_toolchain_targets_[i];
-    if (target->output_type() == Target::NONE)
-      continue;  // Nothing to generate.
-
-    OutputFile target_file = helper_.GetTargetOutputFile(target);
-    if (target_file.value() != target->label().name()) {
-      out_ << "build " << target->label().name() << ": phony ";
-      path_output_.WriteFile(out_, target_file);
-      out_ << std::endl;
-    }
-
-    if (!all_rules.empty())
-      all_rules.append(" $\n    ");
-    all_rules.append(target_file.value());
-  }
-
-  if (!all_rules.empty()) {
-    out_ << "\nbuild all: phony " << all_rules << std::endl;
-    out_ << "default all" << std::endl;
-  }
-}
-